Maintenance method of generator diode assembly

Abstract

The embodiment of the invention discloses a maintenance method for a generator diode assembly. The maintenance method comprises the following steps: disassembling the diode assembly into a plurality of parts; the multiple parts are cleaned; checking the plurality of parts; the plurality of parts comprise diodes, and forward voltage drop detection is carried out on the diodes; performing reverse electric leakage detection on the diode; the plurality of parts further comprise resistors, and the resistance values of the resistors are detected; assembling the plurality of parts into a diode assembly; and the assembled diode assembly is tested. By adopting the method to maintain the diode assembly, disassembly, part detection and part reassembly of the diode assembly are realized, so that the problem that only the whole diode assembly can be replaced in the prior art can be solved, part-level maintenance is realized, the fault diode assembly is replaced by repair, and the maintenance efficiency is improved. And the product maintenance cost is reduced, and the economic benefit is improved on the premise of ensuring the reliability.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of aero-engine maintenance, and particularly relate to a maintenance method of a generator diode assembly. BACKGROUND

[0002] A diode assembly is arranged in an aero-generator. With the increase of the in-flight time of the aero-generator, the failure rate of the diode assembly is continuously increasing. However, due to some reasons of the diode assembly manufacturer, the diode assembly can only be replaced as a whole in the related art, and the diode assembly cannot be maintained, which will lead to the increase of product maintenance cost. SUMMARY

[0003] The present application aims to at least solve one of the problems in the prior art or related art.

[0004] Therefore, according to the technical scheme of the present application, a maintenance method of a generator diode assembly is provided, which comprises: disassembling the diode assembly into multiple parts; cleaning the multiple parts; inspecting the multiple parts; the multiple parts comprising diodes, detecting the forward voltage drop of the diodes; detecting the reverse leakage current of the diodes; the multiple parts further comprising resistors, detecting the resistance values of the resistors; assembling the multiple parts into the diode assembly; and testing the assembled diode assembly.

[0005] In some technical schemes provided by the present application, the diode assembly comprises a first shell and a twist lock fixing frame, the twist lock fixing frame has a locking boss, the first shell has a clamping groove, the locking boss is clamped in the clamping groove, and the diode assembly is disassembled, comprising: pressing down the twist lock fixing frame to make the locking boss move out of the clamping groove along the axial direction of the first shell; rotating the twist lock fixing frame to make the locking boss and the corresponding clamping groove dislocated along the circumferential direction of the first shell; taking out the twist lock fixing frame from the first shell; and dismounting other parts from the first shell.

[0006] In some technical schemes provided by the present application, the inspection of the multiple parts comprises: visually or instrumentally inspecting all the parts to determine whether the parts are damaged; if the parts are damaged, determining that the parts are unqualified and replacing the corresponding parts; and if the parts are not damaged, determining that the parts are qualified.

[0007] In some technical solutions provided in the application, the forward voltage drop of the diode is detected, including: connecting the positive electrode of the diode to the positive electrode of a direct current power supply, and connecting the negative electrode of the diode to the negative electrode of the direct current power supply; increasing the current at a constant speed to a first current value within a first time length, immediately reducing the current to 0A and turning off the direct current power supply, detecting the voltage drop of the diode when the current is reduced from the first current value to 0A and recording it as a first voltage drop; if the first voltage drop is greater than a preset voltage drop, it is determined that the diode is unqualified and the diode is replaced; if the first voltage drop is less than or equal to the preset voltage drop, it is determined that the diode is qualified.

[0008] In some technical solutions provided in the application, the resistance value of the resistor is detected, including: connecting the two ends of the resistor to an ohmmeter and measuring the resistance value of the resistor as a first resistance value; if the first resistance value is outside a preset resistance range, it is determined that the resistor is unqualified; if the first resistance value is within the preset resistance range, the two ends of the resistor are reversely connected to the ohmmeter, and the resistance value of the resistor is measured as a second resistance value; if the second resistance value is outside the preset resistance range, it is determined that the resistor is unqualified; if the second resistance value is within the preset resistance range, it is determined that the resistor is qualified.

[0009] In some technical solutions provided in the application, the reverse leakage current of the diode is detected, including: connecting the positive electrode of the diode to the negative electrode of a direct current high potential tester, and connecting the negative electrode of the diode to the positive electrode of the direct current high potential tester; increasing the voltage at a constant speed to a first voltage value within a second time length, and detecting the leakage current of the diode; if the leakage current is greater than a preset leakage current, it is determined that the diode is unqualified and the diode is replaced; if the leakage current is less than or equal to the preset leakage current, it is determined that the diode is qualified.

[0010] In some embodiments provided in the application, the diode assembly comprises a first shell, a twist lock fixing frame, a plurality of terminals, a second shell, a plurality of connecting pieces, a plurality of diode parts, a resistor part, a first connecting tab, a base, a pivot, a plurality of first gaskets, a plurality of second gaskets, and a plurality of spring washers. The plurality of terminals comprises a positive output terminal, a negative output terminal, and a plurality of diode terminals. The plurality of parts are assembled into the diode assembly, comprising: the inner wall of the first shell has two first installation grooves, the positive output terminal and the negative output terminal are respectively installed in the two first installation grooves; the second shell is installed at the first end of the first shell, the second shell has two second installation grooves, the second shell is rotated to align the two second installation grooves with the two first installation grooves, and the positive output terminal and the negative output terminal respectively extend out of the second shell from the two second installation grooves; the plurality of diode terminals are moved into the first shell and connected to the second shell through the plurality of connecting pieces, any connecting piece is exposed to the second shell, and the connecting piece can conduct electricity; the direction from the first end of the first shell to the second end of the first shell is the first direction, and the plurality of diode parts, the resistor part, the first connecting tab, the base, the pivot, the plurality of first gaskets, the plurality of second gaskets, and the plurality of spring washers are sequentially loaded into the first shell from the second end of the first shell in the first direction; the twist lock fixing frame is installed at the second end of the first shell to axially limit the parts in the first shell.

[0011] In some technical solutions provided in the application, any one of the diode parts comprises a second lug, a diode locator and a diode, the resistor part comprises a third lug, a resistor locator and a resistor, and the plurality of diode parts, the resistor part, the first lug, the base, the pivot, the plurality of first gaskets, the plurality of second gaskets and the plurality of spring washers are sequentially arranged in the first housing from the second end of the first housing in the first direction, comprising: sequentially arranging the second lug, the diode locator and the diode of any one of the plurality of diode parts in the first housing in the first direction; sequentially arranging the third lug, the resistor locator and the resistor in the first housing in the first direction; arranging the first lug in the first housing; sequentially arranging the base and the pivot in the first housing in the first direction, the base has a first arc surface, the first arc surface abuts against the first lug, the pivot has a second arc surface, and the second arc surface abuts against the base; sequentially arranging the plurality of first gaskets, the plurality of second gaskets and the plurality of spring washers in the first housing in the first direction; wherein in the first direction, the second lugs of the plurality of odd-numbered diode parts sequentially and cyclically contact the positive output terminal and the negative output terminal, and the second lugs of the plurality of even-numbered diode parts sequentially contact the plurality of diode terminals; any one of the diode locators has a receiving groove for accommodating a corresponding diode, two diode locators of adjacent diode parts form a group, and in the first direction, the orientations of the receiving grooves of the diode locators in each group change alternately according to the first end of the first housing and the second end of the first housing; in the case where the orientation of the receiving groove of the diode locator is toward the first end of the first housing, the positive electrode of the diode corresponding to the diode locator is toward the second end of the first housing and contacts the adjacent second lug, and the negative electrode contacts the corresponding second lug; in the case where the orientation of the receiving groove of the diode locator is toward the second end of the first housing, the negative electrode of the diode corresponding to the diode locator is toward the second end of the first housing and contacts the adjacent second lug, and the positive electrode contacts the corresponding second lug; the bottom wall and the side wall of the receiving groove are provided with a first positioning groove, any one of the second lugs has a contact piece for contacting the terminal, and any one of the first positioning grooves avoids one of the plurality of terminals, the first positioning groove is used for avoiding the terminal contacted by the second lug of the diode part adjacent to and close to the second end of the first housing and for accommodating the contact piece of the second lug of the diode part adjacent to and close to the second end of the first housing; the third lug contacts the negative output terminal, the two sides of the third lug respectively contact the resistor and the adjacent diode, the resistor locator has a second positioning groove, and the second positioning groove avoids the positive output terminal; and the first lug contacts the positive output terminal.

[0012] In some technical solutions provided in the application, before the diode assembly is disassembled into multiple parts, the torsion lock fixing frame has a convex platform surface on the side facing the second end of the first shell, the distance between the convex platform surface and the end surface of the second end of the first shell is measured and recorded as a first distance; after the diode assembly is disassembled into multiple parts, the distance between the convex platform surface and the end surface of the side of the torsion lock fixing frame facing the first end of the first shell is measured and recorded as a second distance; the pivot has a positioning surface on the side facing the second end of the first shell, the positioning surface is attached to the first gasket, in the case that the second shell, the multiple diode parts, the resistor part, the first connecting piece, the base and the pivot are installed in the first shell, the distance between the positioning surface and the end surface of the second end of the first shell is measured and recorded as a third distance; the sum of the thicknesses of the multiple first gaskets is measured and recorded as a first thickness; the thickness of one second gasket is measured and recorded as a second thickness; the pre-tightening height of the multiple spring washers is determined according to the number, thickness, maximum compression amount and designed stroke amount of the spring washers; the number of the second gaskets is determined according to the first distance, the second distance, the third distance, the first thickness, the second thickness and the pre-tightening height.

[0013] In some technical solutions provided in the application, the assembled diode assembly is tested, including: connecting the positive and negative poles of a direct current power supply to two terminals in the multiple terminals respectively to retest the multiple diodes in the assembled diode assembly; increasing the current at a constant speed to a first current value within a first time length, immediately reducing the current to 0A and turning off the direct current power supply, detecting the voltage drop of the diode assembly in the process of reducing the current from the first current value to 0A and recording it as a second voltage drop; if the second voltage drop is greater than a preset voltage drop, it is determined that the diode assembly is unqualified; if the second voltage drop is less than or equal to the preset voltage drop, it is determined that the diode assembly is qualified; electrically connecting three diode terminals in the multiple diode terminals which are in contact with the second connecting piece to a three-phase alternating current power supply, controlling the output voltage of the three-phase alternating current power supply; recording the direct current voltage and alternating current voltage between the positive output terminal and the negative output terminal; if the direct current voltage is within a first preset voltage range and the alternating current voltage is less than or equal to a second preset voltage, it is determined that the diode assembly is qualified; if the direct current voltage is outside the first preset voltage range and / or the alternating current voltage is greater than the second preset voltage, it is determined that the diode assembly is unqualified; connecting the positive output terminal and the negative output terminal to an ohmmeter and measuring the resistance value as a third resistance value; if the third resistance value is outside a preset resistance range, it is determined that the diode assembly is unqualified; if the third resistance value is within the preset resistance range, reversing the connection of the positive output terminal and the negative output terminal to the ohmmeter and measuring the resistance value as a fourth resistance value; if the fourth resistance value is outside the preset resistance range, it is determined that the diode assembly is unqualified; if the fourth resistance value is within the preset resistance range, it is determined that the diode assembly is qualified.

[0014] Compared with the prior art, the application at least includes the following beneficial effects:

[0015] By adopting the method for repairing the diode assembly, the disassembly, part detection and part reassembly of the diode assembly are realized, thereby the problem that only the diode assembly can be replaced in the prior art is solved, part-level repair is realized, the diode assembly with faults is replaced by repair, product maintenance cost is reduced, and economic benefits are improved under the premise of ensuring reliability. BRIEF DESCRIPTION OF DRAWINGS

[0016] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The detailed description is made with reference to the accompanying drawings.

[0017] Figure 1 Fig. 1 shows a flowchart of a method for repairing a diode assembly of a generator according to an embodiment of the present application;

[0018] Figure 2 Fig. 2 shows a flowchart of a method for repairing a diode assembly of a generator according to another embodiment of the present application;

[0019] Figure 3 Fig. 3 shows a flowchart of a method for repairing a diode assembly of a generator according to still another embodiment of the present application;

[0020] Figure 4 Fig. 4 shows a flowchart of a method for repairing a diode assembly of a generator according to yet another embodiment of the present application;

[0021] Figure 5 Fig. 5 shows a flowchart of a method for repairing a diode assembly of a generator according to still another embodiment of the present application;

[0022] Figure 6 Fig. 6 shows a flowchart of a method for repairing a diode assembly of a generator according to yet another embodiment of the present application;

[0023] Figure 7 Fig. 7 shows a flowchart of a method for repairing a diode assembly of a generator according to still another embodiment of the present application;

[0024] Figure 8 Fig. 8 shows a flowchart of a method for repairing a diode assembly of a generator according to yet another embodiment of the present application;

[0025] Figure 9 Fig. 9 shows a flowchart of a method for repairing a diode assembly of a generator according to still another embodiment of the present application;

[0026] Figure 10 Fig. 10 shows a flowchart of a method for repairing a generator diode assembly according to an embodiment of the present application;

[0027] Figure 11 Fig. 11 shows an exploded view of a diode assembly according to an embodiment of the present application;

[0028] Figure 12 Fig. 12 shows a schematic diagram of steps for assembling a diode assembly according to an embodiment of the present application;

[0029] Figure 13 Fig. 13 shows a top view of a diode assembly according to an embodiment of the present application;

[0030] Figure 14 Fig. 14 shows a cross-sectional view along the A-A section of Fig. 13; Figure 13

[0031] Figure 15 Fig. 15 shows a schematic diagram of a structure of a second gasket according to an embodiment of the present application;

[0032] Figure 16 Fig. 16 shows a schematic diagram of a structure of a second gasket according to an embodiment of the present application;

[0033] Figure 17 Fig. 17 shows a schematic diagram of a structure of a second gasket according to an embodiment of the present application.

[0034] In the drawings, Figures 11 to 17 Correspondence between reference signs and component names in the drawings is as follows:

[0035] 100, diode assembly, 111, first housing, 113, twist lock holder, 115, first end of first housing, 117, second end of first housing, 118, boss surface, 119, limiting surface, 120, second housing, 121, connecting piece, 130, terminal, 131, positive output terminal, 132, negative output terminal, 133, diode terminal, 140, diode part, 141, second connecting piece, 142, diode, 143, diode positioner, 144, first positioning groove, 145, contact piece, 146, accommodating groove, 150, resistor part, 151, resistor, 152, resistor positioner, 153, third connecting piece, 160, first connecting piece, 161, base, 162, pivot, 163, first arc surface, 164, second arc surface, 165, positioning surface, 170, first gasket, 180, second gasket, 190, spring washer. DETAILED DESCRIPTION

[0036] ​In order to better understand the above technical solutions, the technical solutions of the embodiments of the present application are described in detail below with reference to the drawings and specific embodiments. It should be understood that the specific features in the embodiments of the present application and the specific embodiments are detailed descriptions of the technical solutions of the embodiments of the present application, and are not limitations of the technical solutions of the present application. In the case of no conflict, the technical features in the embodiments of the present application and the specific embodiments can be combined with each other.

[0037] The technical solutions of the embodiments of the present application are described below with reference to the drawings and specific embodiments. Figures 1 to 17 The maintenance method of the generator diode assembly provided by some embodiments of the present application is described below.

[0038] The maintenance method of the generator diode assembly provided by some embodiments of the present application is described below. Figure 1 As shown in the figure, the method comprises:

[0039] 102: disassembling the diode assembly into multiple parts;

[0040] 104: cleaning the multiple parts;

[0041] 106: inspecting the multiple parts;

[0042] 108: the multiple parts include diodes, and forward voltage drop detection is performed on the diodes;

[0043] 110: reverse leakage current detection is performed on the diodes;

[0044] 112: the multiple parts further include resistors, and resistance values of the resistors are detected;

[0045] 114: assembling the multiple parts into a diode assembly;

[0046] 116: testing the assembled diode assembly.

[0047] The maintenance method of the generator diode assembly provided by the present application is suitable for the maintenance of the diode assembly in an aero-generator. First, the diode assembly is disassembled into multiple parts, then the multiple parts disassembled from the diode assembly are cleaned and inspected. Specifically, all parts are cleaned with isopropyl alcohol to remove lubricating oil, grease and other contaminants on the parts, and then the parts are preliminarily inspected for appearance damage, overheating, fatigue, excessive wear or cracking. The multiple parts of the diode assembly include diodes, and the electrical performance of the diodes is detected to determine whether the diodes are qualified. Specifically, forward voltage drop detection is first performed on the diodes, and then reverse leakage current detection is performed on the diodes. The number of diodes can be multiple, and the multiple diodes are sequentially subjected to forward voltage drop detection and reverse leakage current detection.

[0048] Further, the diode assembly further comprises a resistor, and the resistance value of the resistor is detected. In the above detection step, if a defective part is detected, for example, the part has appearance damage, the forward voltage drop or reverse leakage of the diode is defective, or the resistance value of the resistor is defective, the defective part needs to be replaced, and if all parts are detected to be qualified, the parts do not need to be replaced.

[0049] Further, after the detection of all parts is completed, all parts are reassembled to reassemble the parts into the diode assembly. Then, the assembled diode assembly is tested to determine whether the assembly process is correct, whether the parts in the diode assembly are correctly connected, and whether the parts are assembled in place.

[0050] By using the method to repair the diode assembly, the disassembly of the diode assembly, the detection of the parts, and the reassembly of the parts are realized, thereby solving the problem that only the diode assembly can be replaced in the prior art, realizing part-level repair, and achieving repair instead of replacement for the diode assembly with faults, reducing product maintenance cost, and improving economic benefit on the premise of ensuring reliability.

[0051] In some embodiments, optionally, the diode assembly comprises a first shell and a twist lock fixing frame, the twist lock fixing frame has a locking boss, the first shell has a clamping groove, the locking boss is clamped in the clamping groove, and the embodiment of the application provides another method for repairing a generator diode, as shown in Figure 2 The step of disassembling the diode assembly specifically comprises:

[0052] 202: The twist lock fixing frame is pressed down to move the locking boss out of the clamping groove along the axial direction of the first shell;

[0053] 204: The twist lock fixing frame is rotated to dislocate the locking boss from the corresponding clamping groove along the circumferential direction of the first shell;

[0054] 206: The twist lock fixing frame is taken out of the first shell;

[0055] 208: Other parts are removed from the first shell.

[0056] In this embodiment, the step of disassembling the diode assembly is specifically limited. The diode assembly comprises a first shell and a twist lock fixing frame, the twist lock fixing frame is clamped at the end of the first shell to limit the parts in the first shell. The twist lock fixing frame has a locking boss, the first shell has a clamping groove, and the locking boss is clamped in the clamping groove. When the diode assembly is disassembled, the twist lock fixing frame needs to be separated from the first shell, and then the parts in the first shell are taken out to realize the disassembly of the diode assembly.

[0057] Firstly, the lower torsion lock fixing frame is pressed to make the locking protrusion move out of the clamping groove along the axial direction of the first shell. Specifically, a special tool can be used to align the groove at the end of the torsion lock fixing frame, and then the special tool is pressed by a press, and the pressure is transmitted to the torsion lock fixing frame by the special tool, so that the locking protrusion of the torsion lock fixing frame moves out of the clamping groove of the first shell under the action of the pressure. The pressure can also be applied to the torsion lock fixing frame in other ways, such as directly applying pressure to the torsion lock fixing frame by a press, or manually applying pressure to the torsion lock fixing frame by an operator.

[0058] Further, after the locking protrusion moves out of the clamping groove under the action of the pressure, the torsion lock fixing frame is rotated to dislocate the locking protrusion from the corresponding clamping groove along the circumferential direction of the first shell, so that the locking protrusion can be prevented from returning to the clamping groove when the torsion lock fixing frame is removed from the first shell later. Then the torsion lock fixing frame is moved along the axial direction of the first shell, and the torsion lock fixing frame is removed from the first shell. Since the torsion lock fixing frame is used to axially limit the parts in the first shell, after the removal of the torsion lock fixing frame is completed, the parts in the first shell can be sequentially removed from the first shell, and other parts connected to the first shell can also be removed from the first shell.

[0059] By using this method to disassemble the diode assembly, damage to the parts can be avoided, and the disassembly efficiency is high, and the disassembly work can be completed without using too many special equipment.

[0060] In some embodiments, optionally, the application provides another maintenance method for a generator diode, as shown in Figure 3 As shown in the figure, the step of inspecting the plurality of parts specifically includes:

[0061] 302: visually or instrumentally inspecting all the parts;

[0062] 304: determining whether the parts are damaged, if the parts are damaged, step 306 is performed, and if the parts are not damaged, step 308 is performed;

[0063] 306: determining that the parts are unqualified and replacing the corresponding parts;

[0064] 308: determining that the parts are qualified.

[0065] In this embodiment, when a plurality of parts are inspected, each part can be preliminarily inspected by visual inspection or by an instrument. Specifically, the appearance of each part is inspected to check whether the part has any of the problems of appearance damage, overheating, fatigue, excessive wear or cracking. If it is determined that the part has any of the above problems, it is determined that the part is damaged, and the corresponding part is replaced. If the part does not have any of the above problems, it is determined that the part is qualified, and subsequent detection can be performed. In this way, the part that has already been damaged can be replaced, and preliminary maintenance of the diode assembly is achieved.

[0066] In some embodiments, optionally, the application provides another method for repairing a generator diode, as shown in Figure 4 The step of detecting the forward voltage drop of the diode specifically includes:

[0067] 402: connecting the positive electrode of the diode to the positive electrode of the DC power supply and connecting the negative electrode of the diode to the negative electrode of the DC power supply;

[0068] 404: increasing the current to a first current value at a constant speed within a first time period, immediately reducing the current to 0A and turning off the DC power supply, detecting the voltage drop of the diode during the process of reducing the current from the first current value to 0A and recording it as a first voltage drop;

[0069] 406: determining whether the first voltage drop is greater than a preset voltage drop, if the first voltage drop is greater than the preset voltage drop, performing step 408, if the first voltage drop is less than or equal to the preset voltage drop, performing step 410;

[0070] 408: determining that the diode is unqualified and replacing the diode;

[0071] 410: determining that the diode is qualified.

[0072] In this embodiment, the method for repairing a generator diode is further limited. The plurality of parts of the diode assembly include a diode. When the forward voltage drop of the diode is detected, a DC power supply for detection is prepared, the positive electrode of the diode is connected to the positive electrode of the DC power supply, and the negative electrode of the diode is connected to the negative electrode of the DC power supply. Then the DC power supply is turned on, the current is increased to a first current value at a constant speed within a first time period, when the current reaches the first current value, the current is immediately reduced to 0A, and the DC power supply is turned off. The voltage drop of the diode during the process of reducing the current from the first current value to 0A is detected and recorded as a first voltage drop. Then it is determined whether the first voltage drop is greater than a preset voltage drop. If the first voltage drop is greater than the preset voltage drop, it is determined that the diode is unqualified and the diode is replaced. If the first voltage drop is less than or equal to the preset voltage drop, it is determined that the diode is qualified and subsequent detection can be performed. The detection of the plurality of diodes is sequentially completed.

[0073] In a possible embodiment, the first time length is less than or equal to 3s, the first current value ranges from 9A to 11A, and the preset voltage drop is 1.4V.

[0074] By using the method to detect the forward voltage drop of the diode, the electrical performance of the diode can be detected, and the unqualified diode can be replaced.

[0075] In some embodiments, optionally, the embodiment of the application provides another maintenance method for the generator diode, as shown in Figure 5 The step of detecting the resistance value of the resistor specifically includes:

[0076] 502: connecting the two ends of the resistor to the multimeter and measuring the resistance value of the resistor as a first resistance value;

[0077] 504: determining whether the first resistance value is within a preset resistance range, if the first resistance value is outside the preset resistance range, performing step 506, and if the first resistance value is within the preset resistance range, performing step 508;

[0078] 506: determining that the resistor is unqualified and replacing the resistor;

[0079] 508: reversely connecting the two ends of the resistor to the multimeter and measuring the resistance value of the resistor as a second resistance value;

[0080] 510: determining whether the second resistance value is within the preset resistance range, if the second resistance value is outside the preset resistance range, performing step 512, and if the second resistance value is within the preset resistance range, performing step 514;

[0081] 512: determining that the resistor is unqualified and replacing the resistor;

[0082] 514: determining that the resistor is qualified.

[0083] In this embodiment, the maintenance method for the generator diode is further limited. The plurality of parts of the diode assembly further includes a resistor. When detecting the resistance value of the resistor, a multimeter for detection is prepared first, the two ends of the resistor are connected to the two terminals of the multimeter respectively, and the resistance value of the resistor is measured by the multimeter as a first resistance value. The first resistance value is compared with a preset resistance range. If the first resistance value is within the preset resistance range, the resistor can be subjected to subsequent detection. If the first resistance value is outside the preset resistance range, it is determined that the resistor is unqualified, and the resistor is replaced.

[0084] Further, if the first resistance value is within the preset resistance range, the two ends of the resistor are reversely connected to the two terminals of the multimeter, and the resistance value of the resistor is measured by the multimeter as a second resistance value. The second resistance value is compared with the preset resistance range. If the second resistance value is within the preset resistance range, the resistor is determined to be qualified. If the second resistance value is outside the preset resistance range, the resistor is determined to be unqualified, and the resistor is replaced.

[0085] In a possible embodiment, the preset resistance range is 66Ω to 95Ω.

[0086] By using the method to detect the resistance of the resistor, the electrical performance of the resistor can be detected, and the unqualified resistor can be replaced.

[0087] In some embodiments, optionally, the embodiment of the present application provides another maintenance method for the generator diode, as shown in Figure 6 The step of detecting the reverse leakage current of the diode specifically includes:

[0088] 602: connecting the anode of the diode to the negative electrode of the direct-current high potential tester and connecting the cathode of the diode to the positive electrode of the direct-current high potential tester;

[0089] 604: increasing the voltage to the first voltage value at a constant speed within a second time length, and detecting the leakage current of the diode;

[0090] 606: determining whether the leakage current is greater than a preset leakage current. If the leakage current is greater than the preset leakage current, step 608 is performed. If the leakage current is less than or equal to the preset leakage current, step 610 is performed.

[0091] 608: determining that the diode is unqualified and replacing the diode;

[0092] 610: determining that the diode is qualified.

[0093] In this embodiment, the maintenance method for the generator diode is further limited. After the forward voltage drop detection of the diode is completed, the reverse leakage current detection of the diode is continued. First, a direct-current high potential tester for detection is prepared, the anode of the diode is connected to the negative electrode of the direct-current high potential tester, and the cathode of the diode is connected to the positive electrode of the direct-current high potential tester. Then, the voltage is increased to the first voltage value at a constant speed within a second time length, and the leakage current of the diode is detected. The detected leakage current is compared with a preset leakage current. If the detected leakage current is greater than the preset leakage current, the diode is determined to be unqualified, and the diode is replaced. If the detected leakage current is less than or equal to the preset leakage current, the diode is determined to be qualified.

[0094] In a possible embodiment, the second time length is 5s, the first voltage value ranges from 590V to 610V, and the preset leakage current is 10μA.

[0095] By adopting the method, the reverse leakage current of the diode is detected, so that the electrical performance of the diode can be detected, and the unqualified diode can be replaced.

[0096] In some embodiments, optionally, the application provides another maintenance method of a generator diode. The diode assembly includes a first shell, a twist lock fixing frame, a plurality of terminals, a second shell, a plurality of connecting pieces, a plurality of diode parts, a resistor part, a first connecting piece, a base, a pivot, a plurality of first gaskets, a plurality of second gaskets, and a plurality of spring washers. The plurality of terminals include a positive output terminal, a negative output terminal, and a plurality of diode terminals, as shown in Figure 7 The step of assembling the plurality of parts into the diode assembly specifically includes:

[0097] 702: The inner wall of the first shell has two first mounting slots, and the positive output terminal and the negative output terminal are respectively mounted in the two first mounting slots;

[0098] 704: The second shell is mounted on the first end of the first shell, the second shell has two second mounting slots, the second shell is rotated to align the two second mounting slots with the two first mounting slots, and the positive output terminal and the negative output terminal respectively extend out of the second shell from the two second mounting slots;

[0099] 706: The plurality of diode terminals are moved into the first shell and connected to the second shell through the plurality of connecting pieces, any connecting piece is exposed to the second shell, and the connecting piece can conduct electricity;

[0100] 708: The direction from the first end of the first shell to the second end of the first shell is the first direction, and the plurality of diode parts, the resistor part, the first connecting piece, the base, the pivot, the plurality of first gaskets, the plurality of second gaskets, and the plurality of spring washers are sequentially loaded into the first shell from the second end of the first shell in the first direction;

[0101] 710: The twist lock fixing frame is mounted on the second end of the first shell to axially limit the parts in the first shell.

[0102] In this embodiment, the assembly process of the diode assembly is defined. The diode assembly includes a first housing, a twist lock holder, a plurality of terminals, a second housing, a plurality of connectors, a plurality of diode sections, a resistor section, a first lug, a base, a pivot, a plurality of first gaskets, a plurality of second gaskets, and a plurality of spring washers. The plurality of terminals includes a positive output terminal, a negative output terminal, and a plurality of diode terminals. After the detection of each part of the diode assembly is completed, each part is reassembled into the diode assembly. First, the positive output terminal and the negative output terminal are assembled. Specifically, the inner wall of the first housing has two first mounting slots, the positive output terminal and the negative output terminal are mounted in the first mounting slots, the first mounting slots extend along the axial direction of the first housing, and a portion of the positive output terminal and the negative output terminal is inserted into the first mounting slots along the axial direction of the first housing.

[0103] Further, the second housing is assembled. The second housing has two second mounting slots adapted to the positive output terminal and the negative output terminal. First, the second housing is aligned with the first end of the first housing, then the second housing is rotated to align the two second mounting slots with the two first mounting slots, and then the second housing is mounted on the first end of the first housing. The portions of the positive output terminal and the negative output terminal exposed from the first housing are inserted into the two second mounting slots, and the end portions of the positive output terminal and the negative output terminal protrude from the second housing to facilitate external testing instruments.

[0104] Further, after the installation of the second housing is completed, the plurality of diode terminals are assembled. Specifically, the diode terminals are connected to the second housing through the connectors, the diode terminals are inserted into the interior of the first housing from the second end of the first housing and abut against the second housing, and then the diode assembly is connected to the second housing through the connectors, and the connectors are exposed from the second housing and can conduct electricity. In this way, the testing instruments can be externally connected to the connectors, so that the testing instruments are electrically connected to the corresponding diode terminals through the connectors. The number of connectors is the same as the number of diode terminals, and the connectors are arranged one-to-one corresponding to the diode terminals.

[0105] In a possible embodiment, the connectors are metal screws, and the torque of the installed screws is 10 pounds / inch to 11 pounds / inch.

[0106] Further, the diode part, the resistor part, the first lug, the base, the pivot, the first gasket, the second gasket and the spring washer are assembled. Specifically, the direction from the first end of the first shell to the second end of the first shell is defined as the first direction, and along the first direction, the plurality of diode parts, the resistor part, the first lug, the base, the pivot, the plurality of first gaskets, the plurality of second gaskets and the plurality of spring washers are sequentially assembled into the first shell along the axial direction of the first shell. That is, the plurality of diode parts, the resistor part, the first lug, the base, the pivot, the plurality of first gaskets, the plurality of second gaskets and the plurality of spring washers are sequentially arranged along the first direction. The plurality of diode parts and the resistor part are respectively conductively connected with the plurality of terminals. Then, the torsion lock fixing frame is used to limit the parts in the first shell. Specifically, the torsion lock fixing frame is installed at the second end of the first shell, and when the torsion lock fixing frame is fixedly connected to the first shell, the parts in the first shell can be axially limited, and the assembly of the diode assembly is completed.

[0107] By using the above method to assemble the parts into the diode assembly, the correct installation of the diode assembly can be realized, the performance of the diode assembly is ensured not to change, and the assembly efficiency is high.

[0108] In some embodiments, optionally, the application provides another method for repairing a generator diode, any diode part includes a second lug, a diode locator and a diode, a resistor part includes a third lug, a resistor locator and a resistor, as shown in Figure 8 The step of sequentially assembling the plurality of diode parts, the resistor part, the first lug, the base, the pivot, the plurality of first gaskets, the plurality of second gaskets and the plurality of spring washers into the first shell from the second end of the first shell along the first direction specifically includes:

[0109] 802: sequentially assembling the second lug, the diode locator and the diode of any diode part in the plurality of diode parts into the first shell along the first direction;

[0110] 804: sequentially assembling the third lug, the resistor locator and the resistor into the first shell along the first direction;

[0111] 806: assembling the first lug into the first shell;

[0112] 808: sequentially assembling the base and the pivot into the first shell along the first direction, the base has a first arc surface, the first arc surface abuts against the first lug, the pivot has a second arc surface, the second arc surface abuts against the base;

[0113] 810: sequentially assembling the plurality of first gaskets, the plurality of second gaskets and the plurality of spring washers into the first shell along the first direction.

[0114] In this embodiment, the assembly process and structure of the diode part and the resistor part are specifically defined. Any diode part includes a second lug, a diode locator and a diode, and when the diode part is assembled, the second lug in the diode part is first assembled into the first housing, and then the diode locator and the diode in the diode part are sequentially assembled into the first housing. Notably, the second lug has an extended contact lug, and when the second lug is installed, the contact lug is attached to one of the plurality of terminals. Specifically, in the first direction, the second lugs of the plurality of odd-numbered diode parts are sequentially and cyclically attached to the positive output terminal and the negative output terminal, and the second lugs of the plurality of even-numbered diode parts are sequentially attached to the plurality of diode terminals. When the first diode part is installed, the second lug of the first diode part is attached to the positive output terminal, when the third diode part is installed, the second lug of the third diode part is attached to the negative output terminal, and when the fifth diode part is installed, the second lug of the fifth diode part is attached to the positive output terminal, and so on. When the second diode part is installed, the second lug of the second diode part is attached to one of the plurality of diode terminals, and when the fourth diode part is installed, the second lug of the fourth diode part is attached to another of the plurality of diode terminals.

[0115] Further, the diode locator is used to position the diode, and the diode locator has a receiving groove for receiving the diode, and a first positioning groove is formed on the bottom wall and the side wall of the receiving groove, and the side wall of the receiving groove is provided with a positioning opening, the positioning opening cooperates with the contact lug in the same diode part to realize mutual positioning, and the bottom wall of the receiving groove has an opening, and the diode is assembled into the receiving groove through the opening. The first positioning groove on the diode locator is used to avoid one of the plurality of terminals, specifically, the first positioning groove is used to avoid the terminal contacted by the second lug of the diode part adjacent to the second end of the first housing, and is used to accommodate the contact lug of the second lug of the diode part adjacent to the second end of the first housing, so that the two adjacent diode parts can be positioned with each other. Taking the second and third diode parts as examples, in the first direction, the first positioning groove of the diode locator in the second diode part avoids the negative output terminal, the contact lug of the second lug in the third diode part contacts the negative output terminal, and is inserted into the first positioning groove of the diode locator in the second diode part, and the two are positioned with each other.

[0116] Further, the mounting direction of the diode positioner of each of the plurality of diode sections varies regularly, specifically, two diode positioners of adjacent diode sections are taken as a group, along the first direction, the orientation of the slot of the accommodating slot of each group of diode positioners alternates regularly between the first end of the first shell and the second end of the first shell. In a possible embodiment, along the first direction, the orientation of the slot of the accommodating slot of the diode positioner of the first diode section and the diode positioner of the second diode section is the same, both towards the first end of the first shell, the orientation of the slot of the accommodating slot of the diode positioner of the third diode section and the diode positioner of the fourth diode section is the same, both towards the second end of the first shell, the orientation of the slot of the accommodating slot of the diode positioner of the fifth diode section and the diode positioner of the sixth diode section is the same, both towards the first end of the first shell, and so on.

[0117] Further, the mounting direction of the diode of each of the plurality of diode sections varies with the mounting direction of the diode positioner. Specifically, in the case where the orientation of the slot of the accommodating slot is towards the first end of the first shell, the positive electrode of the diode corresponding to the diode positioner is towards the second end of the first shell and contacts the second terminal of the adjacent diode section, and the negative electrode contacts the corresponding second terminal. In the case where the orientation of the slot of the accommodating slot is towards the second end of the first shell, the negative electrode of the diode corresponding to the diode positioner is towards the second end of the first shell and contacts the second terminal of the adjacent diode section, and the positive electrode contacts the corresponding second terminal. It should be noted that the diode in the diode section closest to the second end of the second shell has no adjacent second terminal, and the two ends of the diode respectively contact the corresponding second terminal and the third terminal of the resistance section. In a possible embodiment, along the first direction, the orientation of the slot of the accommodating slot of the diode positioner of the second diode section is towards the first end of the first shell, the positive electrode of the diode of the diode section is towards the second end of the first shell, and the negative electrode contacts the corresponding second terminal. Along the first direction, the orientation of the slot of the accommodating slot of the diode positioner of the fourth diode section is towards the second end of the first shell, the negative electrode of the diode of the diode section is towards the second end of the first shell, and the positive electrode contacts the corresponding second terminal.

[0118] By assembling in the above manner, the plurality of diodes can respectively contact different two terminals, and then the detection of the different two terminals can be performed after the parts are assembled into the diode assembly, and then the detection of each diode can be realized.

[0119] Further, after the assembly of the plurality of diode parts is completed, the resistor part is assembled into the first shell. Specifically, the third terminal is assembled first, which is in contact with the negative output terminal. Then the resistor locator is assembled, which has a second positioning groove similar to the structure of the diode locator, which avoids the positive output terminal. Then the resistor is assembled, and the two sides of the third terminal are in contact with the resistor and the diode in the adjacent diode part, respectively. Then the first terminal is assembled, which is in contact with the positive output terminal and is inserted into the second positioning groove to position the resistor locator.

[0120] Further, after the installation of the plurality of diode parts and the resistor part is completed, the base and the pivot are sequentially assembled into the first shell along the first direction. The base has a first arc surface with a cross groove on the first arc surface, and the first arc surface is in contact with the first terminal, and the cross groove is in contact with the first terminal. The first arc surface can be a spherical surface. The pivot has a second arc surface, and the side of the base facing the second end of the second shell has an arc groove matching the second arc surface. The second arc surface is in contact with the arc groove of the base, and the second arc surface can be a spherical surface. Then a plurality of first gaskets, a plurality of second gaskets and a plurality of spring washers are sequentially assembled into the first shell along the first direction.

[0121] By using the above method for assembly, the plurality of diodes and resistors can be in contact with the different two terminals, respectively, and then the detection of the different two terminals can be performed after the parts are assembled into the diode assembly, and then the detection of each diode and resistor can be realized.

[0122] In some embodiments, optionally, the application provides another method for repairing a generator diode, as shown in Figure 9 , the method comprises:

[0123] 902: The side of the twist lock fixing frame facing the second end of the first shell has a convex surface, the distance between the convex surface and the end surface of the second end of the first shell is measured, and recorded as the first distance;

[0124] 904: Disassemble the diode assembly into a plurality of parts;

[0125] 906: Measure the distance between the convex surface and the end surface of the side of the twist lock fixing frame facing the first end of the first shell, and record it as the second distance;

[0126] 908: The side of the pivot facing the second end of the first shell has a positioning surface, which is in contact with the first gasket. In the case where the second shell, the plurality of diode parts, the resistor part, the first terminal, the base and the pivot are installed in the first shell, the distance between the positioning surface and the end surface of the second end of the first shell is measured, and recorded as the third distance;

[0127] 910: Measure the sum of the thicknesses of the plurality of first shims, and record as a first thickness;

[0128] 912: Measure the thickness of one second shim, and record as a second thickness;

[0129] 914: Determine the pre-tightening height of the plurality of spring washers according to the number of spring washers, the thickness, the maximum compression amount, and the designed stroke amount;

[0130] 916: Determine the number of second shims according to the first distance, the second distance, the third distance, the first thickness, the second thickness, and the pre-tightening height.

[0131] In this embodiment, the method for repairing the generator diode is further limited. The spring washer is installed in the diode assembly in the present application, and the spring washer is an elastic part with a certain compression amount. The pre-tightening force is provided by compressing the spring washer, but the spring washer will deform after a long period of use, and the compression amount needs to be increased to ensure that it can provide sufficient pre-tightening force. The compression amount of the spring washer can be adjusted by adjusting the number of second shims. Therefore, the number of second shims needs to be determined when assembling the diode assembly.

[0132] The side of the twist lock fixing frame facing the second end of the first shell has a boss surface, and when the twist lock fixing frame is installed on the first shell, the boss surface has a certain distance from the end surface of the second end of the first shell. Before disassembling the diode assembly into a plurality of parts, the distance between the boss surface and the end surface of the second end of the first shell is measured and recorded as a first distance. Then the diode assembly is disassembled. The twist lock fixing frame is removed from the first shell, and then the size of the twist lock fixing frame is measured. Specifically, the distance between the boss surface and the end surface of the side of the twist lock fixing frame facing the first end of the first shell is measured and recorded as a second distance. When the twist lock fixing frame is installed on the first shell, the end surface of the side of the twist lock fixing frame facing the first end of the first shell is in contact with the spring washer.

[0133] Further, the assembly size of the first shell and the pivot is measured. Specifically, the side of the pivot facing the second end of the first shell has a positioning surface, and the positioning surface is in contact with the first shim. In the case where the second shell, the plurality of diode parts, the resistor part, the first connecting piece, the base, and the pivot are installed on the first shell, the distance between the positioning surface and the end surface of the second end of the first shell is measured and recorded as a third distance.

[0134] Further, the sizes of the first gaskets and the second gaskets are measured. The first gaskets and the second gaskets are rigid parts, the sum of the thicknesses of the first gaskets is measured and recorded as the first thickness. Then the thickness of one second gasket is measured and recorded as the second thickness. Then the thickness of each spring washer is measured, the thickness of the unused spring washer is the normal thickness, the difference between the normal thickness and the measured thickness is the maximum compression amount, and the pre-tightening height of the plurality of spring washers can be determined according to the number of spring washers, the thickness, the maximum compression amount and the designed stroke amount.

[0135] Further, the number of second gaskets is determined according to the first distance, the second distance, the third distance, the first thickness, the second thickness and the pre-tightening height.

[0136] In a possible embodiment, as shown in Figure 13 and Figure 14 , the torsion lock fixing frame 113 has a boss surface 118 on the side facing the second end 117 of the first shell, the first shell 110 has a limiting surface 119, when the torsion lock fixing frame 113 is installed on the first shell 111, the boss surface 118 is flush with the limiting surface 119, and there is a certain distance between the boss surface 118 and the second end 117 of the first shell. Before disassembling the diode assembly 100 into multiple parts, first measure the distance between the boss surface 118 and the end surface of the second end 117 of the first shell, and record it as the first distance, the first distance is recorded as size B.

[0137] As shown in Figure 14 , measure the distance between the boss surface 118 and the end surface of the side of the torsion lock fixing frame 113 facing the first end 115 of the first shell, and record it as the second distance, the second distance is recorded as size C.

[0138] As shown in Figure 14 , the pivot 162 has a positioning surface 165 on the side facing the second end 117 of the first shell, the positioning surface 165 is in contact with the first gasket 170, and in the case where the second shell 120, the plurality of diode parts 140, the resistor part 150, the first wiring piece 170, the base 161 and the pivot 162 are installed on the first shell 111, the distance between the positioning surface 165 and the end surface of the second end 117 of the first shell is measured and recorded as the third distance, the third distance is recorded as size D.

[0139] As shown in Figure 14 , the sum of the thicknesses of the plurality of first gaskets 170 is recorded as the first thickness, and the first thickness is the sum of size E and size G. As shown in Figure 15 , Figure 16 and Figure 17As shown, the thickness of a single second gasket 180 is a second thickness, which is recorded as size H. The number of spring washers 190 is N, the thickness of a single spring washer 190 is J, the thickness of a single unused spring washer 190 is a normal thickness K, the maximum compression amount of a single spring washer 190 is K-J, the designed stroke amount of a spring washer 190 is Q, and the pre-tightening height of N spring washers 190 is recorded as L. L, K, J, Q, and N satisfy the following formula:

[0140] L = (J + (K-J) x Q) x N (1)

[0141] Further, the number M of second gaskets is determined according to the first distance B, the second distance C, the third distance D, the first thickness (E+G), the second thickness H, and the pre-tightening height L, and the specific formula is as follows:

[0142] M = (D-B-C-E-G-L) / H (2)

[0143] If the calculation result of M is an integer, the number of second gaskets 180 is determined as M, and if M is a decimal number, the number of second gaskets 180 is determined as the largest integer less than M.

[0144] In some embodiments, as shown, the step of testing the assembled diode assembly specifically includes: Figure 10

[0145] 1002: Connect the positive and negative poles of the direct current power supply to two of the plurality of terminals, respectively, to retest the plurality of diodes in the assembled diode assembly;

[0146] 1004: Increase the current to a first current value at a constant speed within a first time period, immediately reduce the current to 0A and turn off the direct current power supply, detect the voltage drop of the diode assembly during the process of reducing the current from the first current value to 0A and record it as a second voltage drop;

[0147] 1006: Determine whether the second voltage drop is greater than a preset voltage drop, if the second voltage drop is greater than the preset voltage drop, execute step 1008, if the second voltage drop is less than or equal to the preset voltage drop, execute step 1010;

[0148] 1008: Determine that the diode assembly is unqualified;

[0149] 1010: Determine that the diode assembly is qualified;

[0150] 1012: Electrically connect three diode terminals of the plurality of diode terminals in contact with the second wiring piece to a three-phase alternating current power supply, and control the output voltage of the three-phase alternating current power supply;

[0151] 1014: Record the direct current voltage and alternating current voltage between the positive output terminal and the negative output terminal.​

[0152] 1016: determining whether the direct current voltage is within a first preset voltage range and whether the alternating current voltage is less than or equal to a second preset voltage, if the direct current voltage is within the first preset voltage range and the alternating current voltage is less than or equal to the second preset voltage, performing step 1018, if the direct current voltage is outside the first preset voltage range and / or the alternating current voltage is greater than the second preset voltage, performing step 1020;

[0153] 1018: determining that the diode assembly is qualified;

[0154] 1020: determining that the diode assembly is unqualified;

[0155] 1022: connecting the positive output terminal and the negative output terminal to the multimeter and measuring the resistance value as a third resistance value;

[0156] 1024: determining whether the third resistance value is outside a preset resistance range, if the third resistance value is outside the preset resistance range, performing step 1026, if the third resistance value is within the preset resistance range, performing step 1028;

[0157] 1026: determining that the diode assembly is unqualified;

[0158] 1028: connecting the positive output terminal and the negative output terminal to the multimeter in reverse and measuring the resistance value as a fourth resistance value;

[0159] 1030: determining whether the fourth resistance value is outside the preset resistance range, if the fourth resistance value is outside the preset resistance range, performing step 1032, if the fourth resistance value is within the preset resistance range, performing step 1034;

[0160] 1032: determining that the diode assembly is unqualified;

[0161] 1034: determining that the diode assembly is qualified.

[0162] In this embodiment, the method for repairing the generator diode is further limited. After the assembly of the diode assembly is completed, the diode assembly needs to be retested to ensure correct assembly. First, the diode assembly is subjected to a voltage drop test. Prepare a DC power supply for testing, connect the positive and negative terminals of the DC power supply to two of the plurality of terminals to retest the plurality of diodes in the assembled diode assembly. Understandably, the plurality of diodes in the diode assembly are in contact with two of the plurality of terminals, and by connecting the exposed part of the terminals and measuring, the diodes in the first housing can be detected. During testing, first connect the positive and negative terminals of the DC power supply to the two terminals to be tested, then uniformly increase the current to the first current value within the first time period, then immediately reduce the current to 0A and turn off the DC power supply. The voltage drop of the diode assembly during the process of reducing the current from the first current value to 0A is detected, and the voltage drop is recorded as the second voltage drop. Determine whether the second voltage drop is greater than the preset voltage drop. If the second voltage drop is greater than the preset voltage drop, the diode assembly is determined to be unqualified, and if the second voltage drop is less than or equal to the preset voltage drop, the diode assembly is determined to be qualified. Connect the DC power supply to the plurality of terminals in turn, and the plurality of terminals are connected to the plurality of diodes in the diode assembly to test the plurality of diodes in the diode assembly.

[0163] In one possible embodiment, the first time period is less than or equal to 3s, the first current value is in the range of 9A to 11A, and the preset voltage drop is 1.4V.

[0164] Further, the diode assembly is subjected to an AC ripple test. Prepare a three-phase AC power supply for testing. Connect the three diode terminals in contact with the second terminal to the three-phase AC power supply, control the output voltage of the three-phase AC power supply, and the three-phase AC power supply outputs an AC voltage. Then record the DC voltage and AC voltage between the positive and negative output terminals. If the measured DC voltage is within the first preset voltage range, and the measured AC voltage is less than or equal to the second preset voltage, the diode assembly is determined to be qualified. If the measured DC voltage is outside the first preset voltage range, and / or the measured AC voltage is greater than the second preset voltage, the diode assembly is determined to be unqualified.

[0165] In one possible embodiment, the first preset voltage range is 4.5V to 5.5V, and the second preset voltage is 1V.

[0166] Further, a suppression resistor detection is performed on the diode component. First, prepare a multimeter for measurement. Connect the positive output terminal and the negative output terminal to the multimeter, and measure the resistance value as the third resistance value. Compare the third resistance value with the preset resistance range. If the third resistance value is within the preset resistance range, subsequent detection can be performed on the diode component. If the third resistance value is outside the preset resistance range, it is determined that the diode component is unqualified.

[0167] Further, if the third resistance value is within the preset resistance range, reverse-connect the positive output terminal and the negative output terminal to the multimeter, and measure the resistance value as the fourth resistance value. Compare the fourth resistance value with the preset resistance range. If the fourth resistance value is within the preset resistance range, it is determined that the diode component is qualified. If the fourth resistance value is outside the preset resistance range, it is determined that the diode component is unqualified.

[0168] In a possible embodiment, the preset resistance range is from 66 Ω to 95 Ω.

[0169] In a possible embodiment, as Figure 11 and Figure 12 shown, assemble the parts in sequence according to the order of steps 1 to step 30 in Figure 12 . First, rotatably connect the second housing 120 to the first housing 111. Then, install the positive output terminal 131 and the negative output terminal 132 in two first mounting grooves of the first housing 111 respectively. The positive output terminal 131 is denoted as the F+ terminal, and the negative output terminal 132 is denoted as the F- terminal. Rotate the second housing 120 so that the two second mounting grooves on the second housing 120 are respectively aligned with the two first mounting grooves, and the ends of the positive output terminal 131 and the negative output terminal 132 can be respectively inserted into the two second mounting grooves. Install the 4 diode 142 terminals 133 on the second housing 120 through the connecting members 121 respectively. The 4 diode 142 terminals 133 are respectively denoted as the P1 terminal, the P2 terminal, the P3 terminal, and the P4 terminal. Among them, the positive output terminal 131, the negative output terminal 132, and the multiple diode terminals 133 are all terminals 130.

[0170] The diode 142 assembly 100 includes six diode sections 140 and one resistor section 150, which are sequentially loaded into the first housing 111 after the assembly of four diode 142 terminals 133 is completed. In assembling the diode sections 140, the first second terminal lug 141 is first placed into the first housing 111, either second terminal lug 141 having a contact tab 145 capable of contacting either terminal 130, the contact tab 145 of this second terminal lug 141 abutting the F+ terminal. The corresponding diode retainer 143 is then placed with the slot of the receiving slot 146 facing the first end 115 of the first housing, the first retaining slot 144 aligned with the PI terminal, and the corresponding diode 142 is then placed into the first housing 111 with the positive terminal (i.e., the POS (+) shown in Figure 12 ) of the diode 142 facing the second end 117 of the first housing and the negative terminal (i.e., the NEG (-) shown in Figure 12 ) contacting the corresponding second terminal lug 141.

[0171] The second diode section 140 is then assembled by first placing the second second terminal lug 141 into the first housing 111, the second terminal lug 141 abutting the PI terminal, and then placing the corresponding diode retainer 143 with the slot of the receiving slot 146 facing the first end 115 of the first housing, the first retaining slot 144 aligned with the F- terminal, and the corresponding diode 142 is then placed into the first housing 111 with the positive terminal facing the second end 117 of the first housing and the negative terminal contacting the corresponding second terminal lug 141. It is noted that the second terminal lug 141 of the second diode section 140 contacts the positive terminal of the diode 142 of the first diode section 140.

[0172] The third diode section 140 is then assembled by first placing the third second terminal lug 141 into the first housing 111, the second terminal lug 141 abutting the F- terminal, and then placing the corresponding diode retainer 143 with the slot of the receiving slot 146 facing the second end 117 of the first housing, the first retaining slot 144 aligned with the P2 terminal, and the corresponding diode 142 is then placed into the first housing 110 with the negative terminal facing the second end 117 of the first housing and the positive terminal contacting the corresponding second terminal lug 141. It is noted that the second terminal lug 141 of the third diode section 140 contacts the positive terminal of the diode 142 of the second diode section 140.

[0173] The fourth diode section 140 is then assembled by placing the fourth second tab 141 into the first housing 110, with the second tab 141 abutting the P2 terminal, and then placing the mouth of the receiving slot 146 of the corresponding diode retainer 143 toward the second end 117 of the first housing, with the first positioning slot 144 aligned with the F+ terminal, and then placing the corresponding diode 142 into the first housing 111 with the negative side of the diode 142 facing the second end 117 of the first housing and the positive side in contact with the corresponding second tab 141. Note that the second tab 141 of the fourth diode section 140 is in contact with the negative side of the diode 142 of the third diode section 140.

[0174] The fifth diode section 140 is then assembled by placing the fifth second tab 141 into the first housing 111, with the second tab 141 abutting the F+ terminal, and then placing the mouth of the receiving slot 146 of the corresponding diode retainer 143 toward the first end 115 of the first housing, with the first positioning slot 144 aligned with the P3 terminal, and then placing the corresponding diode 142 into the first housing 111 with the positive side of the diode 142 facing the second end 117 of the first housing and the negative side in contact with the corresponding second tab 141. Note that the second tab 141 of the fifth diode section 140 is in contact with the negative side of the diode 142 of the fourth diode section 140.

[0175] The sixth diode section 140 is then assembled by placing the sixth second tab 141 into the first housing 111, with the second tab 141 abutting the P3 terminal, and then placing the mouth of the receiving slot 146 of the corresponding diode retainer 143 toward the first end 115 of the first housing, with the first positioning slot 144 aligned with the F- terminal, and then placing the corresponding diode 142 into the first housing 111 with the positive side of the diode 142 facing the second end 117 of the first housing and the negative side in contact with the corresponding second tab 141. Note that the second tab 141 of the sixth diode section 140 is in contact with the positive side of the diode 142 of the fifth diode section 140.

[0176] The resistor section 150 is then assembled by placing the third tab 153 into the first housing 110, with the third tab 153 abutting the F- terminal, and then placing the resistor retainer 152 into the first housing 110, with the resistor retainer 152 also having a receiving slot 146 with its mouth facing the first end 115 of the first housing and the second positioning slot of the resistor retainer 152 aligned with the F+ terminal. The resistor 151 is then placed into the first housing 110 with one side of the resistor 151 in contact with the third tab 153. Note that the third tab 153 is in contact with the positive side of the diode 142 of the sixth diode section 140.

[0177] Then the first lug 160 is installed into the first housing 110, the first lug 160 contacts the F+ terminal, and the other side of the resistor 151 contacts the first lug 160.

[0178] Then the base 161, the pivot 162, the plurality of first gaskets 170, the plurality of second gaskets 180, and the plurality of spring washers 190 are installed into the first housing 111 in sequence, wherein the base 161 has a first arc surface 163, the first arc surface 163 abuts the first lug 160. The pivot 162 has a second arc surface 164, the base 161 has an arc groove on the side facing the second end 117 of the second housing, the second arc surface 164 abuts the arc groove of the base 161. Finally, the twist lock holder 113 is installed at the second end 117 of the first housing, and the assembly of the diode assembly 100 is completed.

[0179] After the assembly of the diode assembly 100 is completed, the diode assembly 100 needs to be retested. First, the diode assembly 100 is subjected to a voltage drop test. The positive and negative terminals of a direct current power supply are respectively electrically connected to the six groups of terminals of the diode assembly 100, thereby respectively detecting the six diodes 142 in the diode assembly 100. The six groups of terminals are F- and P1 terminals, F- and P2 terminals, F- and P3 terminals, P1 and F+ terminals, P2 and F+ terminals, and P3 and F+ terminals. During each detection, the current is first increased to 10A uniformly within 3s, then immediately reduced to 0A and the direct current power supply is turned off, and the voltage drop of the diode assembly 100 during the current reduction from 10A to 0A is detected. If the voltage drop is greater than 1.4V, the diode assembly 100 is determined to be unqualified, and if the second voltage drop is less than or equal to 1.4V, the diode assembly 100 is determined to be qualified.

[0180] Then the diode assembly 100 is subjected to an alternating current ripple test. The three terminals of a three-phase alternating current power supply are respectively connected to the P1, P2, and P3 terminals, and the three-phase alternating current power supply is controlled to output an alternating voltage. Then the direct current voltage and the alternating voltage between the F+ and F- terminals are recorded. If the measured direct current voltage is within the range of 4.5V to 5.5V, and the measured alternating voltage is less than or equal to 1V, the diode assembly 100 is determined to be qualified. If the measured direct current voltage is outside the range of 4.5V to 5.5V, and / or the measured alternating voltage is greater than 1V, the diode assembly 100 is determined to be unqualified.

[0181] Then the suppression resistance of the diode assembly 100 is detected. The F+ terminal and the F- terminal are connected with the multimeter and the resistance value is measured, if the measured resistance value is within the range of 66Ω to 95Ω, the diode assembly 100 is subjected to subsequent detection, if the measured resistance value is out of the range of 66Ω to 95Ω, the diode assembly 100 is determined to be unqualified.

[0182] Further, if the measured resistance value is within the range of 66Ω to 95Ω, the F+ terminal and the F- terminal are reversely connected with the multimeter and the resistance value is further measured. If the measured resistance value is within the range of 66Ω to 95Ω, the diode assembly 100 is determined to be qualified, if the measured resistance value is out of the range of 66Ω to 95Ω, the diode assembly 100 is determined to be unqualified.

[0183] In the present application, the terms "first", "second", "third" are only for descriptive purpose, and should not be understood as indicating or implying relative importance; the term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and the like should be interpreted broadly, for example, "connecting" can be fixed connection, or detachable connection, or integrally connected; "connecting" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0184] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it should not be understood as a limitation on the present application.

[0185] In the description of the present application, the terms "one embodiment", "some embodiments", "a specific embodiment" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0186] The above is only the preferred embodiment of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for repairing a generator diode assembly, characterized in that, include: The diode assembly is disassembled into multiple parts; Clean multiple of the aforementioned parts; Inspect multiple of the aforementioned parts; Multiple of the aforementioned components include diodes, and forward voltage drop detection is performed on the diodes; Reverse leakage current detection is performed on the diode; The components also include resistors, and the resistance value of the resistors is detected; The plurality of the aforementioned parts are assembled into the diode assembly; The assembled diode assembly is then tested.

2. The method for repairing a generator diode assembly according to claim 1, characterized in that, The diode assembly includes a first housing and a twist-lock retaining bracket. The twist-lock retaining bracket has a locking boss, and the first housing has a snap-fit ​​groove. The locking boss snaps into the snap-fit ​​groove. Disassembling the diode assembly includes: Press down the twist lock fixing bracket to move the locking boss out of the snap-fit ​​groove along the axial direction of the first housing; Rotate the torsion lock fixing bracket to cause the locking boss and the corresponding snap-fit ​​groove to be misaligned along the circumference of the first housing; Remove the twist lock bracket from the first housing; Remove the other parts from the first housing.

3. The method for repairing the generator diode assembly according to claim 1, characterized in that, The inspection of the plurality of said parts includes: All the parts are inspected visually or with instruments to determine whether there is any damage to the parts; If the part is damaged, the part is determined to be defective and the corresponding part is replaced. If the part is undamaged, then the part is deemed qualified.

4. The method for repairing the generator diode assembly according to claim 1, characterized in that, The forward voltage drop detection of the diode includes: Connect the positive terminal of the diode to the positive terminal of the DC power supply, and connect the negative terminal of the diode to the negative terminal of the DC power supply; The current is increased to a first current value at a constant speed within a first time period, the current is immediately reduced to 0A and the DC power supply is turned off, and the voltage drop of the diode is detected and recorded as the first voltage drop during the process of the current decreasing from the first current value to 0A. If the first voltage drop is greater than the preset voltage drop, then the diode is determined to be defective and the diode is replaced. If the first voltage drop is less than or equal to the preset voltage drop, then the diode is determined to be qualified.

5. The method for repairing the generator diode assembly according to claim 4, characterized in that, The detection of the resistance value of the resistor includes: Connect the two ends of the resistor to a multimeter and measure the resistance of the resistor to the first resistance value; If the first resistance value is outside the preset resistance range, the resistor is determined to be unqualified and replaced. If the first resistance value is within the preset resistance range, then the two ends of the resistor are reversed and connected to the multimeter, and the resistance value of the resistor is measured to be the second resistance value; If the second resistance value is outside the preset resistance range, the resistor is determined to be unqualified and replaced. If the second resistance value is within the preset resistance range, then the resistor is determined to be qualified.

6. The method for repairing a generator diode assembly according to claim 1, characterized in that, The reverse leakage current detection of the diode includes: Connect the positive terminal of the diode to the negative terminal of the DC high potential tester, and connect the negative terminal of the diode to the positive terminal of the DC high potential tester. The voltage is increased to the first voltage value at a constant rate over the second time period, and the leakage current of the diode is detected. If the leakage current is greater than the preset leakage current, the diode is determined to be defective and the diode is replaced. If the leakage current is less than or equal to the preset leakage current, then the diode is determined to be qualified.

7. The method for repairing a generator diode assembly according to claim 5, characterized in that, The diode assembly includes a first housing, a torsion lock bracket, multiple terminals, a second housing, multiple connectors, multiple diode sections, a resistor section, a first terminal block, a base, a pivot, multiple first washers, multiple second washers, and multiple spring washers. The multiple terminals include a positive output terminal, a negative output terminal, and multiple diode terminals. Assembling the multiple components into the diode assembly includes: The inner wall of the first housing has two first mounting slots, in which the positive output terminal and the negative output terminal are respectively installed; The second housing is mounted on the first end of the first housing. The second housing has two second mounting slots. The second housing is rotated so that the two second mounting slots are aligned with the two first mounting slots. The positive output terminal and the negative output terminal extend out of the second housing from the two second mounting slots, respectively. Multiple diode terminals are moved into the first housing and connected to the second housing via multiple connectors, with any one of the connectors exposed outside the second housing and the connectors being conductive. The direction from the first end of the first housing to the second end of the first housing is the first direction. Along the first direction, a plurality of diodes, a resistor, a first terminal piece, a base, a pivot, a plurality of first gaskets, a plurality of second gaskets, and a plurality of spring washers are sequentially installed into the first housing from the second end of the first housing. The twist lock bracket is installed at the second end of the first housing to axially limit the parts inside the first housing.

8. The method for repairing the generator diode assembly according to claim 7, characterized in that, Each of the diode portions includes a second terminal block, a diode positioner, and the diode; the resistor portion includes a third terminal block, a resistor positioner, and the resistor; the step of sequentially inserting a plurality of the diode portions, the resistor portions, the first terminal blocks, the base, the pivot, a plurality of first washers, a plurality of second washers, and a plurality of spring washers into the first housing from the second end of the first housing along the first direction includes: The second terminal block of any one of the plurality of diode sections, the diode positioner, and the diode are sequentially installed into the first housing along the first direction; The third terminal block, the resistor positioner, and the resistor are sequentially installed into the first housing along the first direction; Insert the first connector into the first housing; The base and the pivot are sequentially installed into the first housing along the first direction. The base has a first arc-shaped surface that abuts against the first connector. The pivot has a second arc-shaped surface that abuts against the base. A plurality of first gaskets, a plurality of second gaskets, and a plurality of spring washers are sequentially inserted into the first housing along the first direction; In this configuration, along the first direction, the second terminals of a plurality of odd-numbered diode sections sequentially and cyclically contact the positive output terminal and the negative output terminal, while the second terminals of a plurality of even-numbered diode sections sequentially contact a plurality of diode terminals. Each diode positioner has a receiving groove for accommodating the corresponding diode. Diode positioners of two adjacent diode sections form a group. Along the first direction, the orientation of the groove opening of the receiving groove in each group of diode positioners alternates between facing the first end of the first housing and facing the second end of the first housing. When the groove opening faces the first end of the first housing, the positive terminal of the diode corresponding to the diode positioner faces the second end of the first housing and contacts the adjacent second terminal, while the negative terminal contacts the corresponding second terminal. When the groove opening faces the second end of the first housing, the positive terminal of the diode is facing the second end of the first housing and contacts the adjacent second terminal. The negative terminal of the diode corresponding to the diode positioner faces the second end of the first housing and contacts the adjacent second terminal piece, while the positive terminal contacts the corresponding second terminal piece. The bottom and side walls of the receiving groove are provided with first positioning grooves. Each second terminal piece has a contact piece for contacting the terminal. Each first positioning groove avoids one of the plurality of terminals. The first positioning groove avoids the terminal contacted by the second terminal piece of the diode portion adjacent to and near the second end of the first housing, and is used to accommodate the contact piece of the second terminal piece of the diode portion adjacent to and near the second end of the first housing. The third terminal piece contacts the negative output terminal, and its two sides respectively contact the resistor and the adjacent diode. The resistor positioner has a second positioning groove, and the second avoidance groove avoids the positive output terminal. The first terminal piece contacts the positive output terminal.

9. The method for repairing a generator diode assembly according to claim 8, characterized in that, Prior to disassembling the diode assembly into multiple parts, the method further includes: The twist lock fixing bracket has a boss surface on the side facing the second end of the first housing. The distance between the boss surface and the end face of the second end of the first housing is measured and recorded as the first distance. After disassembling the diode assembly into multiple parts, the method further includes: Measure the distance between the boss surface and the end face of the twist lock bracket facing the first end of the first housing, and record it as the second distance; The pivot has a positioning surface on the side facing the second end of the first housing. The positioning surface is in contact with the first gasket. When the second housing, the plurality of diodes, the resistors, the first terminal, the base, and the pivot are mounted on the first housing, the distance between the positioning surface and the end face of the second end of the first housing is measured and recorded as the third distance. The sum of the thicknesses of the multiple first gaskets is measured and recorded as the first thickness; Measure the thickness of one of the second gaskets and record it as the second thickness; The preload height of the multiple spring washers is determined based on the number, thickness, maximum compression, and design stroke of the spring washers; The number of the second pads is determined based on the first distance, the second distance, the third distance, the first thickness, the second thickness, and the preload height.

10. A method for repairing a generator diode assembly according to any one of claims 7 to 9, characterized in that, The testing of the assembled diode assembly includes: The positive and negative terminals of the DC power supply are respectively connected to two of the terminals in the plurality of terminals to retest the plurality of diodes in the assembled diode assembly. The current is increased to the first current value at a constant speed within the first time period, the current is immediately reduced to 0A and the DC power supply is turned off, and the voltage drop of the diode assembly is detected and recorded as the second voltage drop during the process of the current decreasing from the first current value to 0A. If the second voltage drop is greater than the preset voltage drop, then the diode assembly is determined to be defective. If the second voltage drop is less than or equal to the preset voltage drop, then the diode assembly is determined to be qualified; Three of the diode terminals that are in contact with the second terminal are electrically connected to a three-phase AC power supply to control the output voltage of the three-phase AC power supply; Record the DC voltage and AC voltage between the positive output terminal and the negative output terminal; If the DC voltage is within a first preset voltage range and the AC voltage is less than or equal to a second preset voltage, then the diode assembly is determined to be qualified. If the DC voltage is outside the first preset voltage range, and / or the AC voltage is greater than the second preset voltage, then the diode assembly is determined to be defective. Connect the positive output terminal and the negative output terminal to a multimeter and measure the resistance value to the third resistance value; If the third resistance value is outside the preset resistance range, the diode assembly is determined to be defective. If the third resistance value is within the preset resistance range, then the positive output terminal and the negative output terminal are reverse-connected to the multimeter, and the measured resistance value is the fourth resistance value; If the fourth resistance value is outside the preset resistance range, the diode assembly is determined to be defective. If the fourth resistance value is within the preset resistance range, then the diode assembly is determined to be qualified.

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