Propeller impeller dynamic balancing method and dynamic balancing tool

Abstract

A kind of dynamic balancing method of propeller impeller, comprising the following steps: first, manufacture impeller, then measure impeller, then process impeller surface;Impeller is assembled on dynamic balancing tool;Two top one clip is used to machine the outer circle surface of impeller;Work tool counterweight is pasted on the inner cavity arc surface of impeller, the unbalance of impeller dynamic balancing is calculated, and each value is input into dynamic balancing machine, initial dynamic balancing test is carried out, so that impeller and dynamic balancing tool realize initial dynamic balancing qualification;Work tool counterweight is removed, titanium alloy counterweight of the same material as impeller is welded;Impeller and dynamic balancing tool are placed on dynamic balancing machine again to carry out dynamic balancing test, and the unbalance value of impeller is obtained, the surface of titanium alloy counterweight and the inner cavity arc surface of impeller are polished using tools, so that impeller and dynamic balancing tool are dynamically balanced as a whole.The design is simple to measure and easy to use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of impeller dynamic balancing test, and particularly relates to a dynamic balancing method and dynamic balancing tool for a propeller impeller. BACKGROUND

[0002] At present, the propeller is generally used to provide power and improve speed, and is widely applied in the fields of ships and automobiles. The impeller is a main component of the propeller. The impeller with poor static balancing performance will increase the noise and vibration of the moving part, and will generate a large unbalanced torque in the high-speed working state, thereby affecting the operation quality and precision of the main engine. Therefore, the impeller must be dynamically balanced after actual production and preparation. The traditional dynamic balancing test method relies on manual polishing, and the unbalance amount is removed by directly polishing the unbalanced part on the surface of the impeller. In the polishing process, the polishing amount is uncontrollable, and only the experience of the worker can be relied on. The impeller needs to be polished and tested repeatedly many times to achieve the required balancing precision. SUMMARY

[0003] The present application aims to overcome the defects and problems of the existing impeller test method, and provide a dynamic balancing method and dynamic balancing tool for a propeller impeller, which are simple to test and convenient to use.

[0004] To achieve the above purpose, the technical solution of the present application is as follows:

[0005] A dynamic balancing method for a propeller impeller, the dynamic balancing method comprising the following steps:

[0006] S1, manufacturing an impeller, then measuring the impeller, and then processing the surface of the impeller;

[0007] S2, assembling the impeller on a dynamic balancing tool;

[0008] S3, machining the outer cylindrical surface of the impeller in a two-topping-one-clamping manner;

[0009] S4, pasting a tool counterweight on the inner cavity arc surface of the impeller, calculating the unbalance amount of the impeller dynamic balancing, inputting each value into a dynamic balancing machine, and performing an initial dynamic balancing test to make the impeller and the dynamic balancing tool achieve initial dynamic balancing qualification;

[0010] S5, removing the tool counterweight, and welding a titanium alloy counterweight made of the same material as the impeller;

[0011] S6, placing the impeller and the dynamic balancing tool on the dynamic balancing machine again to perform a dynamic balancing test, obtaining the unbalance amount value and position of the impeller again, and polishing the surface of the titanium alloy counterweight and the inner cavity arc surface of the impeller using a tool, so that the impeller and the dynamic balancing tool are dynamically balanced as a whole.

[0012] The specific steps of the step S1 are:

[0013] S11, manufacturing the impeller blank by using the additive manufacturing 3D printing method, so that the impeller blank is uniform in material and sufficient in machining allowance;

[0014] S12, detecting the type value of the impeller blank by using the handheld portable articulated arm, and analyzing the data model collected by scanning, so as to change the coordinate system and offset the machining allowance;

[0015] S13, performing numerical control machining on all surfaces of the impeller, and reserving a single-sided allowance on the outer circle of the blade of the impeller;

[0016] S14, detecting the type value of the finished impeller by using the handheld portable articulated arm again, and confirming the state of the finished impeller.

[0017] The specific steps of the step S2 are:

[0018] S21, first placing the large end of the impeller upward on a work platform with a hole in the middle;

[0019] S22, first installing the key in the corresponding key groove of the dynamic balance shaft, and installing the simulation filling block in the corresponding balance block groove of the dynamic balance shaft, so that the simulation filling block and the key are symmetrically distributed along the axis of the dynamic balance shaft, and then installing the second spacer ring on the dynamic balance shaft;

[0020] S23, first placing the dynamic balance shaft vertically, and then installing the dynamic balance shaft into the inner hole of the impeller from the large end of the impeller, at this time, one end of the dynamic balance shaft is located outside the small end of the impeller, and the lower end of the second spacer ring abuts against the upper end of the hub of the impeller, then the first spacer ring and the double anti-loose round nut are installed on the dynamic balance shaft from the small end of the impeller in sequence, so that the impeller is fixed.

[0021] The specific steps of the step S3 are:

[0022] First, measure the outer diameter of the tool setting point of the outer circle of the dynamic balance shaft by using the outer diameter micrometer, then zero the machine tool coordinate system at this point, and simultaneously press the holes at both ends of the dynamic balance shaft and clamp the left end of the dynamic balance shaft, and then start machining the outer diameter of the impeller, so that the gap between the outer circle of the impeller and the impeller cover is equal.

[0023] The specific steps of calculating the unbalance amount of the dynamic balance of the impeller are:

[0024] First, place the first counterweight and the second counterweight in the inner cavity of the impeller by using the double-face balance method, and define the plane of the first counterweight perpendicular to the dynamic balance shaft as the first correction plane, and define the plane of the second counterweight perpendicular to the dynamic balance shaft as the second correction plane;

[0025] Secondly, the left and right supporting positions of the dynamic balance shaft are protruded outward, the distance a from the first correction surface to the left supporting position, the distance b between the first correction surface and the second correction surface, and the distance c from the second correction surface to the right supporting position are obtained through the positions of the first counterweight and the second counterweight, and the distance L1 from the large end of the impeller to the left supporting position and the distance L2 from the small end of the impeller to the right supporting position are obtained through a, b and c, and the impeller and the dynamic balance tool are placed on the dynamic balance machine according to the distances L1 and L2;

[0026] Finally, the whole impeller and dynamic balance tool are weighed to obtain the whole weight m of the dynamic balance parts, the theoretical radius r1 of the first counterweight at the first correction surface is obtained, the theoretical radius r2 of the second counterweight at the second correction surface is obtained, and the unbalance amounts m1 and m2 are obtained through the calculation formula of the allowable unbalance amount of the impeller 1.

[0027] The specific steps of the step S5 are as follows:

[0028] The titanium alloy counterweight of the same material as the impeller is welded at the marked position after the pasted tool counterweight is removed.

[0029] When welding, the point thermometer is used to monitor the welding temperature, so that the welding temperature of the titanium alloy counterweight does not exceed 60°.

[0030] The specific steps of the step S6 are as follows:

[0031] Firstly, the impeller and the dynamic balance tool are placed on the dynamic balance machine for dynamic balance test, the unbalance amount values and positions at the first correction surface and the second correction surface of the impeller are obtained, the inner cavity counterweight surface and the inner cavity arc surface of the impeller are polished using the pneumatic spherical milling cutter and the cylindrical dome milling cutter, the titanium alloy counterweight is polished first in the polishing process, the data change value is observed after polishing, the polishing position is adjusted according to the angle and size of the data change, and finally the inner cavity arc surface of the impeller is polished, so that the whole impeller and dynamic balance tool are dynamically balanced.

[0032] A dynamic balancing tool of a propeller impeller, the dynamic balancing tool comprises a dynamic balancing shaft, the dynamic balancing shaft comprises a left supporting part, a belt driving part, a second mounting part, an impeller mounting part, a first mounting part, an outer circle tool setting part, a right supporting part connected in sequence from left to right, a center threaded hole is arranged on the end face of the left supporting part, the belt driving part is externally provided with a driving belt, the second spacer ring is sleeved on the second mounting part, the balance block groove and the key groove are symmetrically arranged on the two sides of the impeller mounting part, the key is mounted in the key groove, the simulation filling block is mounted in the balance block groove, the hub of the impeller is mounted on the impeller mounting part through the key and the simulation filling block, the first spacer ring is sleeved on the first mounting part, the second spacer ring and the first spacer ring are respectively abutted on the left and right end faces of the hub, the double anti-loose round nut is threadedly connected with the outer circle tool setting part and abutted at one end on the first spacer ring, and a center hole is arranged on the end face of the left supporting part.

[0033] A stop step is arranged at the joint of the right supporting part and the outer circle tool setting part, and the diameter of the left end of the stop step is larger than that of the right end.

[0034] Compared with the prior art, the beneficial effects of the present application are that:

[0035] 1、In the dynamic balancing method and dynamic balancing tool of the propeller impeller, the impeller is clamped and fixed through the dynamic balancing tool, so that the impeller is more stable during dynamic balancing test, the dynamic balancing shaft and the impeller are processed by grinding and turning, the size precision of processing is high, the product assembly state is simulated by the weight block of the tool, after the initial dynamic balancing test is qualified, the titanium alloy weight block is installed for dynamic balancing test, the cost is saved, and the utilization rate of the titanium alloy material is improved. Therefore, the present application is simple to calibrate and convenient to use.

[0036] 2、In the dynamic balancing method and dynamic balancing tool of the propeller impeller, the impeller blank is manufactured by 3D printing, the initial unbalance of the impeller dynamic balancing can be reduced, the mold cost generated when the blank is a casting can be saved, and the present application is suitable for single-piece small-batch production, the impeller is detected by the handheld portable articulated arm, the on-site operation is simple, and the applicability is strong, the surface of the impeller is processed by numerical control machining, and the initial unbalance of the impeller dynamic balancing is small. Therefore, the present application is simple to operate and has strong applicability.

[0037] 3, In the propeller impeller dynamic balancing method and dynamic balancing tool, the balance block groove is processed at the symmetrical position of the key groove, the weight difference caused by the density difference between the product spindle and the dynamic balancing spindle can be eliminated, the dynamic balancing spindle outer circle is processed in the two top mode, the impeller outer circle is processed in the two top one clamp mode, the final size requirement of the impeller outer circle can be guaranteed, the size precision of processing is higher, the stop step is arranged on the right supporting part, when the axial stop device locked on the dynamic balancing machine fails, the safety protection function of axial stop can be played. Therefore, the present application has high reliability and high test precision.

[0038] 4, In the propeller impeller dynamic balancing method and dynamic balancing tool, the first counterweight and the second counterweight are installed in the inner cavity of the impeller by adopting the double-face balancing mode, the allowable unbalance of the impeller can be obtained according to the horizontal distance of the first counterweight and the second counterweight and the radius distance from the dynamic balancing shaft axis, the actual placement position can be adjusted conveniently, detection and protection are easy, and the impeller dynamic balancing test operation is safer and more reliable. Therefore, the present application has high reliability and stable working process. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 It is the assembly schematic view of the impeller and the dynamic balancing tool in the application.

[0040] Figure 2 It is the structure schematic view of the impeller in the application.

[0041] Figure 3 It is the structure schematic view of the dynamic balancing shaft in the application.

[0042] Figure 4 It is Figure 3 The sectional view schematic view at A-A in the application.

[0043] Figure 5 It is the side view schematic view of the key in the application.

[0044] Figure 6 It is the top view schematic view of the key in the application.

[0045] Figure 7 It is the side view schematic view of the simulation filling block in the application.

[0046] Figure 8 It is the top view schematic view of the simulation filling block in the application.

[0047] Figure 9 It is the front view schematic view of the double anti-loose round nut in the application.

[0048] Figure 10 It is the sectional view schematic view of the double anti-loose round nut in the application.

[0049] Figure 11It is a schematic diagram of the connection between the impeller and the dynamic balancing shaft in the present invention.

[0050] In the figure: impeller 1, blades 11, hub 12, inner cavity 13, big end 14, small end 15, inner hole 16, dynamic balancing shaft 2, left supporting part 21, center threaded hole 211, belt drive part 22, second mounting part 23, impeller mounting part 24, keyway 241, balancing block groove 242, first mounting part 25, outer circle tool setting part 26, right supporting part 27, center hole 271, stop step 28, first spacer ring 3, second spacer ring 4, double anti-loosening round nut 5, key 6, simulated filling block 7, first counterweight block 8, second counterweight block 9. DETAILED DESCRIPTION

[0051] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0052] See also Figures 1 to 11 A method for dynamic balancing of a propeller impeller, the method comprising the following steps:

[0053] S1, first manufacture the impeller 1, then measure the impeller 1, and then process the surface of the impeller 1;

[0054] S2. Assemble the impeller 1 on the dynamic balancing tool;

[0055] S3. Use the method of two tops and one clamp to turn the outer surface of the impeller;

[0056] S4. Paste the tooling weights on the arc surface of the inner cavity 13 of the impeller 1, calculate the imbalance of the dynamic balance of the impeller 1, and input the various values ​​into the dynamic balancing machine to perform an initial dynamic balancing test to ensure that the impeller 1 and the dynamic balancing tooling achieve the initial dynamic balance.

[0057] S5. Remove the tooling counterweight and weld a titanium alloy counterweight made of the same material as impeller 1;

[0058] S6. Place the impeller 1 and the dynamic balancing fixture back on the dynamic balancing machine for a dynamic balancing test to re-obtain the unbalance value and position of the impeller 1. Use tools to polish the surface of the titanium alloy counterweight block and the arc surface of the inner cavity 13 of the impeller 1 to achieve dynamic balance of the impeller 1 and the dynamic balancing fixture as a whole.

[0059] The specific steps of step S1 are:

[0060] S11. Manufacture the impeller 1 blank using an additive manufacturing 3D printing method, so that the impeller 1 blank has a uniform material and a sufficient machining allowance;

[0061] S12, using a handheld portable articulated arm to detect the blank shape value of the impeller 1, and at the same time analyzing the data model collected by scanning, and performing machining allowance deflection by changing the coordinate system;

[0062] S13, numerical control machining is performed on all surfaces of the impeller 1, and a single-sided allowance is reserved on the outer circle of the blade 11 of the impeller 1;

[0063] S14, the type value of the finished impeller 1 is detected again using the handheld portable articulated arm, and the state of the finished impeller 1 is confirmed.

[0064] The specific steps of the step S2 are:

[0065] S21, first, the large end 14 of the impeller 1 is placed upward and placed on a work platform with a hole in the middle;

[0066] S22, first, the key 6 is installed in the corresponding key groove 241 of the dynamic balance shaft 2, and the simulation filling block 7 is installed in the corresponding balance block groove 242 of the dynamic balance shaft 2, so that the simulation filling block 7 and the key 6 are symmetrically distributed along the axis of the dynamic balance shaft 2, and then the second spacer ring 4 is installed on the dynamic balance shaft 2;

[0067] S23, first, the dynamic balance shaft 2 is placed vertically, and the dynamic balance shaft 2 is installed in the inner hole 16 of the impeller 1 from the large end 14 of the impeller 1, at this time, one end of the dynamic balance shaft 2 is located outside the small end 15 of the impeller 1, and the lower end of the second spacer ring 4 abuts against the upper end of the hub 12 of the impeller 1, and then the first spacer ring 3 and the double anti-loose round nut 5 are installed on the dynamic balance shaft 2 from the small end 15 of the impeller 1 in sequence, so that the impeller 1 is fixed.

[0068] The specific steps of the step S3 are:

[0069] First, the outer diameter of the tool setting point of the outer circle of the dynamic balance shaft 2 is measured by using an outer diameter micrometer, and then the machine tool coordinate system is zeroed at this point, and the holes at the left and right ends of the dynamic balance shaft 2 are actuated, and the left end of the dynamic balance shaft 2 is clamped, and then the outer diameter of the impeller 1 is machined, so that the gap between the outer circle of the impeller 1 and the propeller impeller cover is equal.

[0070] The specific steps of calculating the unbalance of the dynamic balance of the impeller 1 are:

[0071] First, the first counterweight 8 and the second counterweight 9 are placed at the inner cavity 13 of the impeller 1 in a double-face balance manner, and the plane perpendicular to the dynamic balance shaft 2 of the first counterweight 8 is defined as the first correction surface, and the plane perpendicular to the dynamic balance shaft 2 of the second counterweight is defined as the second correction surface;

[0072] Secondly, the left and right support positions of the dynamic balance shaft 2 are protruded outward, the distance a from the first correction surface to the left support position, the distance b between the first correction surface and the second correction surface, and the distance c from the second correction surface to the right support position are obtained through the positions of the first counterweight 8 and the second counterweight 9, and the distance L1 from the large end 14 of the impeller 1 to the left support position and the distance L2 from the small end 15 of the impeller 1 to the right support position of the theoretical impeller 1 are obtained through a, b and c, and the impeller 1 and the dynamic balance tool are placed on the dynamic balance machine according to the distances L1 and L2;

[0073] Finally, the whole impeller 1 and dynamic balance tool are weighed to obtain the whole weight m of the dynamic balance parts, the theoretical radius r1 of the first counterweight 8 at the first correction surface is obtained, the theoretical radius r2 of the second counterweight 9 at the second correction surface is obtained, and the unbalance amounts m1 and m2 are obtained through the calculation formula of the allowable unbalance amount of the impeller 1.

[0074] The specific steps of the step S5 are as follows:

[0075] The titanium alloy counterweight of the same material as the impeller 1 is welded at the marked position after the counterweight is pasted and the pasted tool counterweight is removed.

[0076] When welding, the point thermometer is used to monitor the welding temperature, so that the welding temperature of the titanium alloy counterweight does not exceed 60°.

[0077] The specific steps of the step S6 are as follows:

[0078] Firstly, the impeller 1 and the dynamic balance tool are placed on the dynamic balance machine again for dynamic balance test, the unbalance amount values and positions at the first correction surface and the second correction surface of the impeller 1 are obtained, and the inner cavity 13 counterweight surface and the inner cavity 13 arc surface of the impeller 1 are polished using the pneumatic spherical milling cutter and the cylindrical dome milling cutter, in the polishing process, the titanium alloy counterweight is polished first, after polishing, the dynamic balance machine is started to see the change value of the data, according to the angle and size of the data change, the polishing position is adjusted, and finally the inner cavity 13 arc surface of the impeller 1 is polished, so that the whole impeller 1 and the dynamic balance tool are dynamically balanced.

[0079] A dynamic balancing tool of a propeller impeller, the dynamic balancing tool comprises a dynamic balancing shaft 2, the dynamic balancing shaft 2 comprises a left supporting part 21, a belt driving part 22, a second mounting part 23, an impeller mounting part 24, a first mounting part 25, an outer circle tool setting part 26 and a right supporting part 27 which are sequentially connected from left to right, a central threaded hole 211 is formed in the end face of the left supporting part 21, a driving belt is placed outside the belt driving part 22, the second spacer ring 4 is sleeved on the second mounting part 23, balance block grooves 242 and key grooves 241 are symmetrically formed in the two sides of the impeller mounting part 24, the key 6 is mounted in the key groove 241, the simulation filling block 7 is mounted in the balance block groove 242, the hub 12 of the impeller 1 is mounted on the impeller mounting part 24 through the key 6 and the simulation filling block 7, the first spacer ring 3 is sleeved on the first mounting part 25, the second spacer ring 4 and the first spacer ring 3 abut the left and right end faces of the hub 12 respectively, the double anti-loose round nut 5 is threadedly connected to the outer circle tool setting part 26 and abuts one end of the first spacer ring 3, and a central hole 271 is formed in the end face of the left supporting part 21.

[0080] A stop step 28 is arranged at the intersection of the right supporting part 27 and the outer circle tool setting part 26, and the diameter of the left end of the stop step 28 is greater than that of the right end.

[0081] The principles of the application are as follows:

[0082] The material of the impeller 1 is titanium alloy, an axial stop device is arranged on the dynamic balancing machine, the axial stop device is arranged relative to the right end of the dynamic balancing shaft 2, the material of the simulation filling block 7 is titanium alloy, the outer dimension is the same as the outer contour of the balance block groove 242, and the material of the dynamic balancing shaft 2 is carbon steel. When the dynamic balancing test of the impeller is performed, the key 6, the simulation filling block 7 and the second spacer ring 4 are sequentially mounted on the dynamic balancing shaft 2, then the dynamic balancing shaft 2 is hoisted to be vertical through the central threaded hole 211, is loaded into the inner hole 16 of the impeller 1, then the first spacer ring 3 and the double anti-loose round nut 5 are sequentially mounted, the mounted impeller and the dynamic balancing tool are placed to be flat, the outer circle is processed, the reflective strip of the rotating speed is pasted on the outer circle of the shaft end of the right supporting part 27 after processing, the pressure rod with a roller is used to press on the end face, the right supporting part 27 and the stop step 28 are reserved with a gap of 5mm, the driving belt is placed at the belt driving part 22, and the dynamic balancing machine is started after the placement is qualified, and the dynamic balancing test is performed.

[0083] Example 1:

[0084] Referring to Figures 1 to 11 , S1, the impeller 1 is first manufactured, then the impeller 1 is measured, and then the surface of the impeller 1 is processed, and the specific steps are as follows:

[0085] S11, adopt additive manufacturing 3D printing method to manufacture impeller 1 blank, single side allowance 5±2mm, make impeller 1 blank material uniform and processing allowance sufficient;

[0086] S12, use handheld portable articulated arm to detect impeller 1 blank type value, analyze the data model collected by scanning, change the coordinate system, and process the allowance bias;

[0087] S13, carry out numerical control processing to all surfaces of the impeller 1, and reserve single side allowance 1mm on the outer circle of the blade 11 of the impeller 1;

[0088] S14, use handheld portable articulated arm to detect the type value of the finished impeller 1 again, and confirm the state of the finished impeller 1.

[0089] S2, assemble the impeller 1 on the dynamic balance tool, the specific steps are as follows:

[0090] S21, first put the large end 14 of the impeller 1 upwards and place it on a work platform with a hole in the middle;

[0091] S22, first check the outer circle runout of the dynamic balance shaft 2, then use two tips to top the holes at the left and right ends of the dynamic balance shaft 2, then grind the outer circle surface of the dynamic balance shaft 2, after processing, install the key 6 in the corresponding key groove 241 of the dynamic balance shaft 2, and install the simulation filling block 7 in the corresponding balance block groove 242 of the dynamic balance shaft 2, so that the simulation filling block 7 and the key 6 are symmetrically distributed along the axis of the dynamic balance shaft 2, then install the second spacer ring 4 on the dynamic balance shaft 2;

[0092] S23, first place the dynamic balance shaft 2 vertically, put the dynamic balance shaft 2 into the inner hole 16 of the impeller 1 from the large end 14 of the impeller 1, at this time, one end of the dynamic balance shaft 2 is located outside the small end 15 of the impeller 1, and the lower end of the second spacer ring 4 abuts against the upper end of the hub 12 of the impeller 1, then install the first spacer ring 3 and the double anti-loose round nut 5 from the small end 15 of the impeller 1 to the dynamic balance shaft 2 in turn, so as to fix the impeller 1.

[0093] S3, adopt two tips and one clamp to turn the outer circle surface of the impeller, the specific steps are as follows:

[0094] First, measure the outer diameter of the tool setting point of the outer circle of the dynamic balance shaft 2 with an outside micrometer, then zero the machine tool coordinate system at this point, top the holes at the left and right ends of the dynamic balance shaft 2, and clamp the left end of the dynamic balance shaft 2, then start processing the outer diameter of the impeller 1, so that the gap between the outer circle of the impeller 1 and the propeller impeller cover is equal.

[0095] S4, paste the tool counterweight on the inner cavity 13 of the impeller 1, first, place the first counterweight 8 and the second counterweight 9 at the inner cavity 13 of the impeller 1 in a double balance manner, define the first correction plane as the plane perpendicular to the dynamic balance shaft 2 of the first counterweight 8, and define the second correction plane as the plane perpendicular to the dynamic balance shaft 2 of the second counterweight; second, protrude the left and right supporting positions of the dynamic balance shaft 2 outward by 50 mm, obtain the distance a from the first correction plane to the left supporting position, the distance b between the first correction plane and the second correction plane, and the distance c from the second correction plane to the right supporting position through the positions of the first counterweight 8 and the second counterweight 9, and obtain the distance L1 from the large end 14 of the impeller 1 to the left supporting position and the distance L2 from the small end 15 of the impeller 1 to the right supporting position through a, b, and c, and place the impeller 1 and the dynamic balance tool on the dynamic balance machine according to the distances L1 and L2; finally, weigh the impeller 1 and the dynamic balance tool as a whole to obtain the overall weight m of the dynamic balance components, obtain the theoretical radius r1 of the placement position of the first counterweight 8 on the first correction plane, obtain the theoretical radius r2 of the placement position of the second counterweight 9 on the second correction plane, obtain the unbalance amounts m1 and m2 through the calculation formula of the allowable unbalance amount of the impeller 1, input the numerical values into the dynamic balance machine, and perform initial dynamic balance test to make the impeller 1 and the dynamic balance tool achieve initial dynamic balance qualification.

[0096] S5, remove the tool counterweight, and weld the titanium alloy counterweight of the same material as the impeller 1, and the specific steps are as follows:

[0097] Mark the position of the counterweight, remove the tool counterweight, and weld the titanium alloy counterweight of the same material as the impeller 1 at the marked position, the tool counterweight is a self-adhesive square carbon steel block with the same quality, and the distance between the counterweight close to the large end 14 and the large end 14 is 20 mm. When welding, use a point thermometer to monitor the welding temperature, so that the welding temperature of the titanium alloy counterweight does not exceed 60°.

[0098] S6, first, place the impeller 1 and the dynamic balance tool on the dynamic balance machine again to perform dynamic balance test, obtain the unbalance amount values and positions at the first correction plane and the second correction plane of the impeller 1, and then use the pneumatic spherical milling cutter and the cylindrical dome milling cutter to polish the surface of the counterweight and the inner cavity 13 arc surface of the impeller 1, in the polishing process, first polish the titanium alloy counterweight, start the dynamic balance machine after polishing, observe the change value of the data, adjust the polishing position according to the angle and size of the data change, and finally polish the inner cavity 13 arc surface of the impeller 1 to make the impeller 1 and the dynamic balance tool dynamically balanced as a whole.

[0099] A dynamic balancing tool for a propeller impeller, the dynamic balancing tool comprising a dynamic balancing shaft 2, the dynamic balancing shaft 2 comprising a left supporting part 21, a belt driving part 22, a second mounting part 23, an impeller mounting part 24, a first mounting part 25, an outer circle tool part 26, a right supporting part 27 connected in sequence from left to right, a central threaded hole 211 is arranged on the end face of the left supporting part 21, a driving belt is placed outside the belt driving part 22, the second spacer ring 4 is sleeved on the second mounting part 23, balance block grooves 242 and key grooves 241 are symmetrically arranged on both sides of the impeller mounting part 24, the key 6 is mounted in the key groove 241, the simulation filling block 7 is mounted in the balance block groove 242, the hub 12 of the impeller 1 is mounted on the impeller mounting part 24 through the key 6 and the simulation filling block 7, the first spacer ring 3 is sleeved on the first mounting part 25, the second spacer ring 4 and the first spacer ring 3 abut the left and right end faces of the hub 12 respectively, the double anti-loose round nut 5 is threadedly connected to the outer circle tool part 26 and abuts one end of the first spacer ring 3, a central hole 271 is arranged on the end face of the left supporting part 21. A stop step 28 is arranged at the intersection of the right supporting part 27 and the outer circle tool part 26, and the diameter of the left end of the stop step 28 is greater than the diameter of the right end.

Claims

1. A method for dynamic balancing of a propeller impeller, characterized in that: The dynamic balancing method comprises the following steps: S1, first manufacturing the impeller (1), then measuring the impeller (1), and then processing the surface of the impeller (1); S2. Assemble the impeller (1) on the dynamic balancing tool; S3, using a two-top and one-clamp method to turn the outer surface of the impeller (1); S4, pasting a tooling weight block on the arc surface of the inner cavity (13) of the impeller (1), calculating the imbalance of the dynamic balance of the impeller (1), and inputting each value into the dynamic balancing machine to perform an initial dynamic balancing test, so that the impeller (1) and the dynamic balancing tooling achieve the initial dynamic balance qualification; S5, remove the tooling counterweight and weld a titanium alloy counterweight made of the same material as the impeller (1); S6. Re-place the impeller (1) and the dynamic balancing tool on the dynamic balancing machine to perform a dynamic balancing test, and re-obtain the value and position of the unbalance amount of the impeller (1). Use a tool to grind the surface of the titanium alloy counterweight block and the arc surface of the inner cavity (13) of the impeller (1) to achieve dynamic balance of the impeller (1) and the dynamic balancing tool as a whole; The specific steps of step S2 are: S21. First, place the impeller (1) with its large end (14) facing upward on a work platform with a hole in the middle; S22, first install the key (6) in the keyway (241) corresponding to the dynamic balancing shaft (2), and at the same time install the simulated filling block (7) in the balancing block groove (242) corresponding to the dynamic balancing shaft (2), so that the simulated filling block (7) and the key (6) are symmetrically distributed along the axis of the dynamic balancing shaft (2), and then install the second spacer ring (4) on the dynamic balancing shaft (2); S23. First, place the dynamic balancing shaft (2) vertically and install the dynamic balancing shaft (2) into the inner hole (16) of the impeller (1) from the large end (14) of the impeller (1). At this time, one end of the dynamic balancing shaft (2) is located outside the small end (15) of the impeller (1), and the lower end of the second spacer ring (4) abuts against the upper end of the hub (12) of the impeller (1). Then, install the first spacer ring (3) and the double anti-loosening round nut (5) on the dynamic balancing shaft (2) from the outside of the small end (15) of the impeller (1) in sequence to fix the impeller (1); The specific steps of calculating the unbalance amount of the dynamic balance of the impeller (1) are: First, a first counterweight (8) and a second counterweight (9) are placed in the inner cavity (13) of the impeller (1) using a double-plane balancing method, with the plane of the first counterweight (8) perpendicular to the dynamic balancing axis (2) defined as a first correction plane, and the plane of the second counterweight perpendicular to the dynamic balancing axis (2) defined as a second correction plane; Secondly, the left and right supporting positions of the dynamic balancing shaft (2) are protruded outwards, and the distance a from the first correction surface to the left supporting position, the distance b between the first correction surface and the second correction surface, and the distance c from the second correction surface to the right supporting position are obtained through the positions of a, b, and c. The theoretical distance L1 from the large end (14) of the impeller (1) to the left supporting position and the distance L2 from the small end (15) of the impeller (1) to the right supporting position can be obtained through a, b, and c. The impeller (1) and the dynamic balancing tool are placed on the dynamic balancing machine according to the distance requirements of L1 and L2. Finally, the impeller (1) and the dynamic balancing tool are weighed as a whole to obtain the overall weight m of the dynamic balancing parts, the theoretical radius r1 of the first counterweight (8) at the position where it is placed on the first correction surface, and the theoretical radius r2 of the second counterweight (9) at the position where it is placed on the second correction surface. The unbalance amounts m1 and m2 are obtained by using the calculation formula of the allowable unbalance amount of the impeller (1).

2. The dynamic balancing method for a propeller impeller according to claim 1, characterized in that: The specific steps of step S1 are: S11, using an additive manufacturing 3D printing method to manufacture an impeller (1) blank, so that the impeller (1) blank has a uniform material and a sufficient machining allowance; S12, using a handheld portable articulated arm to detect the blank shape value of the impeller (1), and at the same time analyzing the data model collected by scanning, and performing machining allowance deflection by changing the coordinate system; S13, performing CNC machining on all surfaces of the impeller (1), and simultaneously reserving a single-side margin on the outer circle of the blades (11) of the impeller (1); S14, using the handheld portable articulated arm again to detect the shape value of the impeller (1) after fine processing, and confirm the state of the impeller (1) after fine processing.

3. The method for dynamic balancing of a propeller impeller according to claim 1, characterized in that: The specific steps of step S3 are: First, use an outside micrometer to measure the outside diameter of the outer circle of the dynamic balancing shaft (2) at the tool point, then reset the machine tool coordinate system to zero at this point, and at the same time, push the holes at the left and right ends of the dynamic balancing shaft (2), and clamp the left end of the dynamic balancing shaft (2), and then start processing the outer diameter of the impeller (1) to make the gap between the outer circle of the impeller (1) and the impeller cover of the propeller equal.

4. The method for dynamic balancing of a propeller impeller according to claim 1, characterized in that: The specific steps of step S5 are: Make a mark at the location where the counterweight is pasted, remove the pasted tooling counterweight, and weld a titanium alloy counterweight made of the same material as the impeller (1) at the marked location. The tooling counterweight is a self-adhesive square carbon steel block of equal quality.

5. The method for dynamic balancing of a propeller impeller according to claim 4, characterized in that: During welding, a spot thermometer is used to monitor the welding temperature so that the welding temperature of the titanium alloy counterweight does not exceed 60°.

6. The method for dynamic balancing of a propeller impeller according to claim 1, characterized in that: The specific steps of step S6 are: First, the impeller (1) and the dynamic balancing tool are placed back on the dynamic balancing machine for a dynamic balancing test, and the unbalance values ​​and positions at the first correction surface and the second correction surface of the impeller (1) are obtained. Then, a pneumatic spherical milling cutter and a cylindrical dome milling cutter are used to grind the surface of the inner cavity (13) counterweight block and the inner cavity (13) arc surface of the impeller (1). During the grinding process, grinding is first performed on the titanium alloy counterweight block. After grinding, the dynamic balancing machine is started to observe the change value of the data. According to the angle and size of the data change, the grinding position is adjusted. Finally, grinding is performed on the inner cavity (13) arc surface of the impeller (1) to achieve overall dynamic balance of the impeller (1) and the dynamic balancing tool.

7. A dynamic balancing tool for a propeller impeller, characterized by: The dynamic balancing tool is applied to a dynamic balancing method for a propeller impeller according to any one of claims 1 to 6, wherein the dynamic balancing tool comprises a dynamic balancing shaft (2), and the dynamic balancing shaft (2) comprises a left supporting portion (21), a belt driving portion (22), a second mounting portion (23), an impeller mounting portion (24), a first mounting portion (25), an outer circle tool portion (26), and a right supporting portion (27) connected in sequence from left to right, wherein a central threaded hole (211) is provided on the end face of the left supporting portion (21), a driving belt is placed outside the belt driving portion (22), the second spacer ring (4) is sleeved on the second mounting portion (23), and the two sides of the impeller mounting portion (24) are symmetrically provided with A balancing block groove (242) and a key groove (241), the key (6) is installed in the key groove (241), the simulated filling block (7) is installed in the balancing block groove (242), the hub (12) of the impeller (1) is installed on the impeller mounting portion (24) through the key (6) and the simulated filling block (7), the first spacer ring (3) is sleeved on the first mounting portion (25), the second spacer ring (4) and the first spacer ring (3) are respectively abutted against the left and right end faces of the hub (12), the double anti-loosening round nut (5) is threadedly connected to the outer circle tool portion (26) and one end is abutted against the first spacer ring (3), and a center hole (271) is opened on the end face of the left support portion (21).

8. The dynamic balancing tool for a propeller impeller according to claim 7, characterized in that: A stop step (28) is provided at the intersection of the right supporting portion (27) and the outer circle tool setting portion (26), and the diameter of the left end of the stop step (28) is larger than the diameter of the right end.

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