Clamping device for automatic detection of generator rotor and use method of clamping device

Abstract

The invention discloses a clamping device for automatic detection of a generator rotor and a use method thereof, the clamping device comprises a support arm, one end of the support arm is screwed and provided with a puller screw, the other end of the support arm is provided with a conductive block, and one side, facing the puller screw, of the conductive block forms a clamping surface; a transverse hole is formed in the conductive block, an insulating sleeve is installed on the side, located on the clamping face, of the transverse hole, a contact is installed in the insulating sleeve in a sliding mode, the insulating sleeve insulates the contact from the conductive block, one end of the contact extends out of the clamping face, the other end of the contact abuts against one end of a first spring, and the other end of the first spring abuts against an insulating pipe. The insulating tube is fixedly mounted in the transverse hole; the current measuring wire is electrically connected with the conductive block, and one end of the voltage measuring wire is electrically connected with the contact. The clamping device can increase the contact area with a rotor coil conductor, is stable in contact, and can meet the detection requirements of direct-current resistance, alternating-current impedance, alternating-current withstand voltage and insulation resistance under the condition that the clamping device does not need to be replaced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of generator rotor detection, and particularly relates to a kind of for generator rotor automation detection clamping device and its using method. BACKGROUND

[0002] Generator rotor factory test, power failure detection, preventive test, involve direct current resistance, alternating current impedance, alternating current withstand voltage and insulation resistance and multiple detection items, in order to ensure the accuracy of voltage measurement value, excess conductor resistance voltage cannot be counted, voltage needs to be led out from the rotor of the tested product, and cannot be led out with current. And according to the standard alternating current withstand voltage test, the rotor needs to withstand 2500V high voltage, and the rotor needs to withstand 200A large current when testing direct current resistance. During the project detection, the traditional wiring clamp such as alligator clip is used to clamp the top outside conductor of the rotor, and high voltage and large current are applied for testing, especially large current test, which requires that the contact surface area of the wiring clamp and the top metal sheet conductor of the rotor is large and stable, so as to ensure stable current transmission. The existing alligator clip is a metal clamp with serrated edge, and the top conductor of the rotor is a plane, the serrated contact surface of the alligator clip cannot completely match the plane of the top conductor of the rotor, the contact area is small and easy to loosen, the contact is unstable, the contact resistance value changes due to the change of clamping position and contact area each time, it cannot be used for a long time, and the clamp will be hot, which cannot form stable large current test. The test needs to adjust the test clamp repeatedly, and the measured data cannot truly reflect the actual operation situation.

[0003] When the generator rotor needs to detect multiple items such as direct current resistance, alternating current impedance, alternating current withstand voltage and insulation resistance, there is no clamp that can adapt to large current and large voltage at present, so different clamps need to be used for each switching of items, which is low in efficiency, easy to make mistakes and has safety hazards. In order to change this situation, a clamping device capable of increasing contact area and being stable is needed to ensure stable transmission of large current and high voltage. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a kind of for generator rotor automation detection clamping device and its using method, which can increase the contact area with the rotor coil conductor, and the contact is more stable, without replacing the clamping device, it can meet the detection requirements of direct current resistance, alternating current impedance, alternating current withstand voltage and insulation resistance.

[0005] To achieve the above objectives, in a first aspect, this application provides an automated detection and clamping device for generator rotors, comprising a support arm, one end of which is screwed with a tightening screw, and the other end of which is fitted with a conductive block. The conductive block forms a clamping surface facing the tightening screw. A transverse hole is provided in the conductive block, and an insulating sleeve is installed on one side of the clamping surface of the transverse hole. A contact is slidably installed in the insulating sleeve, which insulates the contact from the conductive block. One end of the contact extends from the clamping surface, and the other end abuts against one end of a first spring. The other end of the first spring abuts against an insulating tube, which is fixedly installed in the transverse hole. A current measuring wire is electrically connected to the conductive block, and one end of a voltage measuring wire is electrically connected to the contact. The other end passes through the first spring and the insulating tube, and then exits from the conductive block.

[0006] The insulating sleeve includes a support portion, one end of which is provided with a first protrusion and the other end with a second protrusion. Inside the insulating sleeve, one end of the first protrusion is provided with a first sliding hole and one end of the second protrusion is provided with a second sliding hole. The first sliding hole and the second sliding hole are connected, and the inner diameter of the first sliding hole is smaller than the inner diameter of the second sliding hole. The transverse hole is provided with a flange on one side of the clamping surface, and the support portion abuts against the flange. The contact includes a first column, one end of which is provided with a second column. The first column is slidably installed in the second sliding hole, and the second column passes through the first sliding hole and extends out of the clamping surface.

[0007] A support sleeve is provided at the other end of the first column, one end of the first spring is fitted onto the support sleeve, and the voltage measuring wire is fixed inside the support sleeve.

[0008] The inner hole of the insulating tube has a ring platform at one end facing the insulating sleeve, and the other end of the first spring abuts against the ring platform.

[0009] A plug is installed at the end of the transverse hole away from the clamping surface. An clearance hole is provided on the insulating sleeve. A wire-passing hole is provided on the conductive block at the position corresponding to the clearance hole. The other end of the voltage measuring wire passes through the clearance hole on the first spring and the insulating tube, and then passes out through the wire-passing hole.

[0010] The conductive block is provided with a connection hole, and the other end of the support arm is inserted into the connection hole for fixation; the support arm is provided with a corresponding hole, which is concentric with the transverse hole and has the same inner diameter.

[0011] The support arm has a third sliding hole at one end inserted into the connecting hole, and a second spring is installed in the third sliding hole. The conductive block has a fourth sliding hole at the position corresponding to the third sliding hole. A sliding member is slidably and sealingly installed in the third and fourth sliding holes. One end of the sliding member abuts against the second spring, and the other end extends out of the fourth sliding hole. The support arm has a feed hole that communicates with the third sliding hole. The top of the feed hole has a receiving cavity, and a sliding plug is installed in the receiving cavity. A sealing cap is screwed onto the top of the receiving cavity, and a third spring is installed between the sealing cap and the sliding plug. The sliding member includes a sliding column, and a flow channel is provided inside the sliding column. During the process of the sliding member retracting into the third sliding hole, the conductive paste in the receiving cavity is output from the flow channel inside the sliding column to the clamping surface.

[0012] The flow channel inside the sliding column includes a guide hole located inside the sliding column. The guide hole is open at one end of the sliding column that extends out of the clamping surface and closed at the other end. A first valve hole is radially provided at one end inside the sliding column, and the first valve hole communicates with the guide hole. When the sliding member retracts to the third sliding hole, the first valve hole communicates with the feed hole for a period of time.

[0013] The flow channel inside the sliding column includes a guide hole inside the sliding column, which is closed at both ends. A first valve hole is provided at one end inside the sliding column, and a second valve hole is provided at the other end. The first valve hole and the second valve hole are respectively connected to the guide hole. A collecting groove is provided inside the fourth sliding hole. Multiple connecting holes are also provided inside the conductive block. One end of the connecting hole is connected to the collecting groove, and the other end extends to the clamping surface. When the sliding member retracts to the third sliding hole, the first valve hole is connected to the feed hole for a period of time, and the second valve hole is connected to the collecting groove.

[0014] A clamping block is installed at one end of the tightening screw facing the clamping surface; an extension rod is provided at the end of the tightening screw connected to the clamping block, and the end of the extension rod is provided with an arc head, the diameter of which is larger than the diameter of the extension rod; one end of the extrusion block is an extrusion surface, and the other end is provided with a blind hole, the bottom of which is an arc concave surface that matches the arc head; the extension rod is inserted into the blind hole, the arc head abuts against the arc concave surface; a screw is screwed onto the extrusion block, the threaded end of which is close to the extension rod.

[0015] Limiting plates are provided on both sides of the clamping block, and the two limiting plates are slidably disposed on both sides of the support arm.

[0016] On the other hand, the present invention also provides a method of using the aforementioned automated testing clamping device for generator rotors, for detecting DC resistance, AC impedance, AC withstand voltage, and insulation resistance of generator rotors. The method includes the following steps: S1. By rotating the clamping screw, adjust the distance between the clamping screw and the clamping surface so that the distance is 3 to 5 times greater than the thickness of the conductor at the top of the rotor; S2. Clamp the two clamping devices onto the two conductors at the top of the rotor coil respectively. During clamping, first move the clamping device to place the conductor between the clamping screw and the clamping surface. Then, bring the sliding part and the contact to the conductor, and then rotate the clamping screw to bring the clamping screw into contact with the conductor. After that, quickly rotate the clamping screw to push the conductor toward the clamping surface. During the pushing process, the sliding part retracts toward the third sliding hole. During this process, the receiving cavity, the feed hole and the flow channel inside the sliding column are connected. The conductive paste in the receiving cavity is squeezed by the third spring and output from the flow channel inside the sliding column to the clamping surface. S3. When the conductor comes into contact with the clamping surface, the flow channel inside the sliding column is misaligned and closed with the feed hole. S4. After the two clamping devices are installed, connect the current measuring wires and voltage measuring wires on the two clamping devices to the AC / DC integrated tester. S5. When testing DC resistance, AC impedance, AC withstand voltage and insulation resistance, use an integrated AC / DC tester. When testing insulation resistance and DC resistance, switch the integrated tester to DC voltage output. At this time, DC resistance is a high current test item, and the current is stably transmitted to the rotor conductor through the conductive block in the clamping device. During AC withstand voltage and AC impedance tests, the integrated tester is switched to AC voltage output. At this time, AC impedance is a high voltage test item. The contacts are compressed and spring back, and the contacts maintain stable contact with the rotor conductor to ensure reliable transmission of voltage signals. Perform DC resistance, AC impedance, insulation resistance and AC withstand voltage tests in sequence, and record the test data; S5. After the test, keep the clamping surface in contact with the conductor, rotate the tightening screw in the opposite direction to move the tightening screw away from the conductor, and then quickly remove the clamping device.

[0017] Compared with the prior art, the above-conceptual technical solution conceived in this application has the following beneficial effects: 1. The conductive block of this invention is used to contact the rotor coil conductor. The clamping surface of the conductive block has a larger area, thereby increasing the contact area with the rotor coil conductor. The tightening screw is used to tighten the rotor coil conductor, making the rotor coil conductor tightly abut against the clamping surface, thus making the contact between the clamping surface and the rotor coil conductor more stable. The current measuring wire is electrically connected to the conductive block, and the larger contact surface can meet the requirements of large current. The voltage measuring wire is electrically connected to the contact, thereby meeting the measurement requirements of large voltage and small current. The voltage measuring wire does not contact the rotor coil conductor through the conductive block, but directly contacts the rotor coil conductor through the contact, making the measurement of small current more accurate. Without changing the clamping device, it can meet the detection requirements of DC resistance, AC impedance, AC withstand voltage and insulation resistance. Large current and large voltage can pass stably for a long time, improving the accuracy and efficiency of testing, reducing test errors, and making operation simple and convenient.

[0018] 2. The sliding member of the present invention includes a sliding column, and a flow channel is provided inside the sliding column. During the process of the sliding member retracting towards the third sliding hole, the conductive paste in the receiving cavity is output from the flow channel inside the sliding column to the clamping surface, thereby improving the conductivity between the clamping surface and the rotor coil conductor.

[0019] 3. By setting up a clamping block, the present invention enables the clamping screw to clamp the rotor coil conductor more stably. When the rotor coil conductor is deformed, the clamping block can adaptively adjust its angle due to the abutment between the arc head and the arc concave surface, thereby improving clamping stability. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0021] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0022] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of AA.

[0023] Figure 3 This is a schematic diagram of the tightening screw in this invention.

[0024] Figure 4 for Figure 2 Enlarged structural diagram at point A in the middle.

[0025] Figure 5 This is a cross-sectional structural diagram of the insulating tube, insulating sleeve, and contact of the present invention.

[0026] Figure 6 for Figure 4Enlarged structural diagram at point B, showing the slider in the extended state.

[0027] Figure 7 for Figure 4 Enlarged structural diagram at point B in the middle, showing the sliding component in its retracted state.

[0028] Figure 8 for Figure 4 A magnified structural diagram at point B, showing the state of the slider after it has retracted to its limit.

[0029] Figure label: Current measuring wire 1, voltage measuring wire 2; Support arm 10, corresponding hole 12, receiving cavity 13, sliding plug 14, third spring 15, sealing cover 16, feed hole 17, third sliding hole 18, sealing ring 19; Tightening screw 20, extension rod 21, arc head 22; Conductive block 30, clamping surface 31, connecting hole 32, transverse hole 33, flange 34, wire hole 35, fourth sliding hole 36, collecting groove 37, connecting hole 38; Insulating tube 40, ring platform 41, first spring 42, clearance hole 43; Plug 50; Insulating sleeve 60, support part 61, first boss 62, second boss 63, first sliding hole 64, second sliding hole 65; Contact 70, first column 71, second column 72, support sleeve 73; Sliding component 80, sliding column 81, guide hole 82, first valve hole 83, second valve hole 84, second spring 85; Clamping block 90; extrusion surface 91, blind hole 92, arc concave surface 93, limiting plate 94. Detailed Implementation

[0030] To more clearly illustrate the purpose, technical solution, and beneficial effects of this application, a further detailed description of this application is provided below in conjunction with illustrations and specific embodiments. It should be specifically noted that the specific embodiments described below are only for illustrating the technical content of this application and do not constitute a limitation on the scope of protection of this application.

[0031] Regarding the explanation of terminology: In this application, "and / or" is used to describe the relationship between related objects, covering three possible situations: taking "A and / or B" as an example, it can indicate the situation where only A exists, A and B exist simultaneously, or only B exists; the symbol " / " indicates the "or" relationship between related objects, such as "A / B" which refers to A or B.

[0032] Regarding the description of the embodiments: The terms "exemplary" and "for example" appearing in this application are only used to illustrate the technical solutions through specific examples. It should be particularly emphasized that any implementation method or design scheme marked as "exemplary" or "for example" should not be construed as having an advantage over other solutions. Such expressions are only used to present the technical concepts more intuitively.

[0033] Example 1: See Figure 1 , 2 This invention provides an automated detection and clamping device for generator rotors, comprising a support arm 10, which has a U-shaped structure. One end of the support arm 10 is screwed with a tightening screw 20, and the other end is fitted with a conductive block 30. The conductive block 30 forms a clamping surface 31 on the side facing the tightening screw 20. A transverse hole 33 is provided inside the conductive block 30. An insulating sleeve 60 is installed on the side of the transverse hole 33 located on the clamping surface 31. A contact 70 is slidably installed inside the insulating sleeve 60, which insulates the contact 70 from the conductive block 30. One end of the contact 70 extends from the clamping surface 31, and the other end abuts against one end of a first spring 42. The other end of the first spring 42 abuts against an insulating tube 40, which is fixedly installed inside the transverse hole 33. A current measuring wire 1 is electrically connected to the conductive block 30, and a voltage measuring wire 2 is electrically connected to the contact 70 at one end, and the other end passes through the first spring 42 and the insulating tube 40 before exiting from the conductive block 30.

[0034] The conductive block 30 is used to contact the rotor coil conductor. The clamping surface 31 of the conductive block 30 has a larger area, thereby increasing the contact area with the rotor coil conductor. The tightening screw 20 is used to tighten the rotor coil conductor, making the rotor coil conductor tightly abut against the clamping surface 31, making the contact between the clamping surface 31 and the rotor coil conductor more stable. The current measuring lead 1 is electrically connected to the conductive block 30, and its larger contact surface can meet the needs of large current. The voltage measuring lead 2 is electrically connected to the contact 70, thereby meeting the needs of high voltage and low current measurement. The voltage measuring lead 2 does not contact the rotor coil conductor through the conductive block 30, but directly contacts the rotor coil conductor through the contact 70, making the measurement of small current more accurate. Without changing the clamping device, it can meet the detection needs of DC resistance, AC impedance, AC withstand voltage and insulation resistance.

[0035] In this embodiment, both the conductive block 30 and the contact 70 are made of copper.

[0036] See Figure 2 , 45. The insulating sleeve 60 includes a support portion 61. One end of the support portion 61 is provided with a first protrusion 62, and the other end is provided with a second protrusion 63. The insulating sleeve 60 has a first sliding hole 64 at the end of the first protrusion 62 and a second sliding hole 65 at the end of the second protrusion 63. The first sliding hole 64 and the second sliding hole 65 are connected, and the inner diameter of the first sliding hole 64 is smaller than the inner diameter of the second sliding hole 65. A flange 34 is provided on one side of the transverse hole 33 located on the clamping surface 31, and the support portion 61 abuts against the flange 34. The contact 70 includes a first column 71. One end of the first column 71 is provided with a second column 72. The first column 71 is slidably installed in the second sliding hole 65, and the second column 72 passes through the first sliding hole 64 and extends out of the clamping surface 31. The above structure insulates the contact 70 from the conductive block 30 and allows the contact 70 to expand and contract elastically. During testing, the contact 70 can be pressed tightly against the conductor under the elastic force of the first spring 42, resulting in higher stability.

[0037] See Figure 5 A support sleeve 73 is provided at the other end of the first column 71. One end of the first spring 42 is fitted onto the support sleeve 73, and the voltage measuring wire 2 is fixed inside the support sleeve 73. The support sleeve 73 not only serves to position the first spring 42, limiting its placement on the contact 70, but also serves to connect the voltage measuring wire 2. In use, one end of the voltage measuring wire 2 is connected to the support sleeve 73 by soldering.

[0038] See Figure 5 An annular platform 41 is provided at one end of the inner hole of the insulating tube 40 facing the insulating sleeve 60, and the other end of the first spring 42 abuts against the annular platform 41. Through the above structure, the first spring 42 is confined within the insulating tube 40.

[0039] See Figure 2 , 4 A plug 50 is installed at the end of the transverse hole 33 away from the clamping surface 31. An clearance hole 43 is provided on the insulating sleeve 60. A wire-passing hole 35 is provided on the conductive block 30 at the position corresponding to the clearance hole 43. The other end of the voltage measuring wire 2 passes through the first spring 42 and the clearance hole 43 on the insulating tube 40, and then exits through the wire-passing hole 35. Through this structure, the insulating tube 40, the insulating sleeve 60, and the contact 70 are installed, and the voltage measuring wire 2 can exit through the conductive block 30.

[0040] See Figure 2 , 3The conductive block 30 is provided with a connection hole 32, and the other end of the support arm 10 is inserted into the connection hole 32 for fixation; the support arm 10 is provided with a corresponding hole 12, which is concentric with the transverse hole 33 and has the same inner diameter. Through the above structure, the support arm 10 is connected and fixed to the conductive block 30, and the installation of the insulating tube 40, the insulating sleeve 60, and the contact 70 is satisfied.

[0041] Example 2: Based on Example 1, see Figure 2 , 4 6. One end of the support arm 10 inserted into the connecting hole 32 is provided with a third sliding hole 18. A second spring 85 is installed in the third sliding hole 18. The conductive block 30 is provided with a fourth sliding hole 36 at the position corresponding to the third sliding hole 18. A sliding member 80 is slidably and sealingly installed in the third sliding hole 18 and the fourth sliding hole 36. One end of the sliding member 80 abuts against the second spring 85, and the other end extends out of the fourth sliding hole 36. The support arm 10 is provided with a feed hole 17 communicating with the third sliding hole 18. The top of the feed hole 17 is provided with... There is a receiving cavity 13, in which a sliding plug 14 is installed. A sealing cap 16 is screwed onto the top of the receiving cavity 13, and a third spring 15 is installed between the sealing cap 16 and the sliding plug 14. The sliding member 80 includes a sliding column 81, in which a flow channel is provided. During the process of the sliding member 80 retracting towards the third sliding hole 18, the conductive paste in the receiving cavity 13 is output from the flow channel inside the sliding column 81 to the clamping surface 31, thereby improving the conductivity between the clamping surface 31 and the rotor coil conductor.

[0042] In use, conductive paste is filled into the receiving cavity 13, the third spring 15 squeezes the sliding plug 14, and the sliding plug 14 applies pressure to the conductive paste. When the flow channel is open, the conductive paste in the receiving cavity 13 is output from the flow channel inside the sliding column 81 to the clamping surface 31.

[0043] In one embodiment, the flow channel inside the sliding column 81 includes a guide hole 82 located inside the sliding column 81. The guide hole 82 is open at one end of the sliding column 81 extending from the clamping surface 31 and closed at the other end. A first valve hole 83 is radially arranged at one end inside the sliding column 81, and the first valve hole 83 communicates with the guide hole 82. When the sliding member 80 retracts towards the third sliding hole 18, the first valve hole 83 communicates with the feed hole 17 for a period of time. With this structure, the conductive paste is extruded into the area around the sliding member 80.

[0044] In another option, see Figure 6The flow channel inside the sliding column 81 includes a guide hole 82 inside the sliding column 81, which is closed at both ends. A first valve hole 83 is provided at one end inside the sliding column 81, and a second valve hole 84 is provided at the other end. The first valve hole 83 and the second valve hole 84 are respectively connected to the guide hole 82. A collecting groove 37 is provided inside the fourth sliding hole 36. Multiple connecting holes 38 are also provided inside the conductive block 30. One end of each connecting hole 38 is connected to the collecting groove 37, and the other end extends to the clamping surface 31. When the sliding member 80 retracts towards the third sliding hole 18, the first valve hole 83 is connected to the feed hole 17 for a period of time, and the second valve hole 84 is connected to the collecting groove 37. With this structure, a larger area of ​​conductive paste can be extruded.

[0045] The third sliding hole 18 has annular grooves installed on both sides of the first valve hole 83, and a sealing ring 19 is installed in the annular groove.

[0046] See Figure 6 At this time, the sliding member 80 is in the extended state, and the first valve hole 83 is completely misaligned and closed with the feed hole 17.

[0047] See Figure 7 This is a schematic diagram of the retracted state of the sliding member 80. At this time, the first valve hole 83 and the feed hole 17 are partially misaligned or aligned. The conductive paste in the receiving cavity 13 is squeezed out from the guide hole 82 inside the sliding column 81 through the connecting hole 38 to the clamping surface 31.

[0048] See Figure 8 At this point, the sliding member 80 has retracted to its limit. At this point, the first valve hole 83 and the feed hole 17 are completely misaligned and closed, and the conductive paste in the receiving cavity 13 cannot be squeezed out.

[0049] Example 3: See Figure 2 , 3 A clamping block 90 is installed at one end of the tightening screw 20 facing the clamping surface 31. An extension rod 21 is provided at the end of the tightening screw 20 connected to the clamping block 90. ​​The end of the extension rod 21 has an arc-shaped head 22, the diameter of which is larger than the diameter of the extension rod 21. One end of the pressing block 90 is a pressing surface 91, and the other end has a blind hole 92. The bottom of the blind hole 92 is an arc-shaped concave surface 93 that matches the arc-shaped head 22. The extension rod 21 is inserted into the blind hole 92, and the arc-shaped head 22 abuts against the arc-shaped concave surface 93. A screw is screwed onto the pressing block 90, with the threaded end of the screw close to the extension rod 21. By setting the clamping block 90, the tightening screw 20 can clamp the rotor coil conductor more stably. When the rotor coil conductor deforms, the clamping block 90 adaptively adjusts its angle due to the abutment between the arc-shaped head 22 and the arc-shaped concave surface 93, improving clamping stability.

[0050] Furthermore, limit plates 94 are provided on both sides of the clamping block 90. ​​The two limit plates 94 are slidably disposed on both sides of the support arm 10. When the tightening screw 20 is rotated, the clamping block 90 will not rotate.

[0051] Example 4: A method for using an automated testing clamping device for generator rotors is described, used to test the DC resistance, AC impedance, AC withstand voltage, and insulation resistance of generator rotors. The method includes the following steps: S1. By rotating the tightening screw 20, adjust the distance between the tightening screw 20 and the clamping surface 31 so that the distance is 3 to 5 times greater than the thickness of the conductor at the top of the rotor; S2. Clamp the two clamping devices onto the two conductors at the top of the rotor coil respectively. During clamping, first move the clamping devices to place the conductors between the tightening screw 20 and the clamping surface 31; then bring the sliding member 80 and the contact 70 into contact with the conductors, and then rotate the tightening screw 20 to bring it into contact with the conductors; then quickly rotate the tightening screw 20 to push the conductors toward the clamping surface 31; during the pushing process, the sliding member 80 retracts toward the third sliding hole 18. During this process, the flow channels inside the receiving cavity 13, the feed hole 17, and the sliding column 81 are connected. The conductive paste in the receiving cavity 13 is squeezed by the third spring 15 and output from the flow channel inside the sliding column 81 to the clamping surface 31. Figure 6 , 7 As shown; S3. When the conductor abuts against the clamping surface 31, the flow channel inside the sliding column 81 is misaligned and closed with the feed hole 17, such as... Figure 8 As shown; S4. After the two clamping devices are installed, connect the current measuring wire 1 and voltage measuring wire 2 on the two clamping devices to the AC / DC integrated tester. S5. When testing DC resistance, AC impedance, AC withstand voltage and insulation resistance, there is no need to switch the clamping device; use an integrated AC / DC tester for testing. When testing insulation resistance and DC resistance, switch the integrated tester to DC voltage output. At this time, DC resistance is a high current test item, and there is no need to switch the high current clamping device. The current is stably transmitted to the rotor conductor through the conductive block 30 in the clamping device. During AC withstand voltage and AC impedance testing, the integrated tester is switched to AC voltage output. At this time, AC impedance is a high voltage test item, and there is no need to switch to the high voltage clamping device. The contact 70 rebounds under pressure, and the contact 70 maintains stable contact with the rotor conductor to ensure reliable transmission of voltage signal. Perform DC resistance, AC impedance, insulation resistance and AC withstand voltage tests in sequence, and record the test data; S5. After the test, keep the clamping surface 31 in contact with the conductor, rotate the tightening screw 20 in the opposite direction to move the tightening screw 20 away from the conductor, and then quickly remove the clamping device to prevent the conductive paste from overflowing when removing the clamping device.

[0052] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the invention. Modifications and variations made by those skilled in the art in accordance with the spirit of the invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. An automated detection and clamping device for generator rotors, characterized in that: Includes a support arm (10), one end of which is screwed with a tightening screw (20), and the other end is fitted with a conductive block (30), the conductive block (30) forming a clamping surface (31) on the side facing the tightening screw (20). The conductive block (30) is provided with a transverse hole (33). An insulating sleeve (60) is installed on one side of the clamping surface (31) of the transverse hole (33). A contact (70) is slidably installed in the insulating sleeve (60). The insulating sleeve (60) insulates the contact (70) from the conductive block (30). One end of the contact (70) extends out from the clamping surface (31), and the other end abuts against one end of the first spring (42). The other end of the first spring (42) abuts against the insulating tube (40). The insulating tube (40) is fixedly installed in the transverse hole (33). The current measuring wire (1) is electrically connected to the conductive block (30). One end of the voltage measuring wire (2) is electrically connected to the contact (70), and the other end passes through the first spring (42) and the insulating tube (40) before exiting from the conductive block (30).

2. The automatic detection and clamping device for generator rotors according to claim 1, characterized in that: The insulating sleeve (60) includes a support portion (61), one end of which is provided with a first boss (62) and the other end with a second boss (63). Inside the insulating sleeve (60), one end of the first boss (62) is provided with a first sliding hole (64), and one end of the second boss (63) is provided with a second sliding hole (65). The first sliding hole (64) and the second sliding hole (65) are connected, and the inner diameter of the first sliding hole (64) is smaller than that of the second sliding hole (65). The inner diameter of the transverse hole (33) is provided with a flange (34) on one side of the clamping surface (31), and the support part (61) abuts against the flange (34); the contact (70) includes a first column (71), a second column (72) is provided at one end of the first column (71), the first column (71) is slidably installed in the second sliding hole (65), the second column (72) passes through the first sliding hole (64), and the second column (72) extends out of the clamping surface (31).

3. The automatic detection and clamping device for generator rotors according to claim 2, characterized in that: The other end of the first column (71) is provided with a support sleeve (73), one end of the first spring (42) is fitted onto the support sleeve (73), and the voltage measuring wire (2) is fixed inside the support sleeve (73).

4. The automatic detection and clamping device for generator rotors according to claim 1, characterized in that: The inner hole of the insulating tube (40) has a ring platform (41) at one end facing the insulating sleeve (60), and the other end of the first spring (42) abuts against the ring platform (41).

5. A generator rotor automated detection and clamping device according to claim 1 or 4, characterized in that: A plug (50) is installed at one end of the transverse hole (33) away from the clamping surface (31). An avoidance hole (43) is provided on the insulating sleeve (60). A wire hole (35) is provided on the conductive block (30) at the position corresponding to the avoidance hole (43). The other end of the voltage measuring wire (2) passes through the first spring (42) and the avoidance hole (43) on the insulating tube (40), and then passes out through the wire hole (35).

6. The automatic detection and clamping device for generator rotors according to claim 1, characterized in that: The conductive block (30) is provided with a connection hole (32), and the other end of the support arm (10) is inserted into the connection hole (32) for fixation; the support arm (10) is provided with a corresponding hole (12), and the corresponding hole (12) is concentric with the transverse hole (33) and has the same inner diameter.

7. The automated detection and clamping device for generator rotors according to claim 6, characterized in that: The support arm (10) is provided with a third sliding hole (18) at one end of the connection hole (32). A second spring (85) is installed in the third sliding hole (18). The conductive block (30) is provided with a fourth sliding hole (36) at the position corresponding to the third sliding hole (18). A sliding member (80) is slidably and sealingly installed in the third sliding hole (18) and the fourth sliding hole (36). One end of the sliding member (80) abuts against the second spring (85), and the other end extends out of the fourth sliding hole (36). The support arm (10) is provided with a feed hole (17) that communicates with the third sliding hole (18). The top of the feed hole (17) is provided with a receiving cavity (13), a sliding plug (14) is installed in the receiving cavity (13), a sealing cap (16) is screwed onto the top of the receiving cavity (13), and a third spring (15) is installed between the sealing cap (16) and the sliding plug (14); the sliding member (80) includes a sliding column (81), and a flow channel is provided inside the sliding column (81). During the process of the sliding member (80) retracting towards the third sliding hole (18), the conductive paste in the receiving cavity (13) is output from the flow channel inside the sliding column (81) to the clamping surface (31).

8. The automated detection and clamping device for generator rotors according to claim 7, characterized in that: The flow channel inside the sliding column (81) includes a guide hole (82) inside the sliding column (81). The guide hole (82) is open at one end of the sliding column (81) extending out of the clamping surface (31) and closed at the other end. A first valve hole (83) is radially provided at one end inside the sliding column (81). The first valve hole (83) is connected to the guide hole (82). When the sliding member (80) retracts to the third sliding hole (18), the first valve hole (83) is connected to the feed hole (17) for a period of time.

9. The automatic detection and clamping device for generator rotor according to claim 7, characterized in that: The flow channel inside the sliding column (81) includes a guide hole (82) inside the sliding column (81). The two ends of the guide hole (82) are closed. One end inside the sliding column (81) is provided with a first valve hole (83), and the other end outside is provided with a second valve hole (84). The first valve hole (83) and the second valve hole (84) are respectively connected to the guide hole (82). The fourth sliding hole (36) is provided with a collection groove (37). The conductive block (30) is also provided with multiple connecting holes (38). One end of the connecting hole (38) is connected to the collection groove (37), and the other end extends to the clamping surface (31). When the sliding member (80) retracts to the third sliding hole (18), the first valve hole (83) is connected to the feed hole (17) for a period of time, and the second valve hole (84) is connected to the collection groove (37).

10. The automatic detection and clamping device for generator rotor according to claim 1, characterized in that: The clamping screw (20) is fitted with a clamping block (90) at one end facing the clamping surface (31); the end of the clamping screw (20) connected to the clamping block (90) is provided with an extension rod (21), and the end of the extension rod (21) is provided with an arc head (22), the diameter of the arc head (22) is larger than the diameter of the extension rod (21); one end of the extrusion block (90) is an extrusion surface (91), and the other end is provided with a blind hole (92), the bottom of the blind hole (92) is an arc concave surface (93) adapted to the arc head (22), the extension rod (21) is inserted into the blind hole (92), the arc head (22) abuts against the arc concave surface (93), and a screw is screwed onto the extrusion block (90), the threaded end of the screw is close to the extension rod (21).

11. The automatic detection and clamping device for generator rotors according to claim 10, characterized in that: Limiting plates (94) are respectively provided on both sides of the clamping block (90), and the two limiting plates (94) are slidably arranged on both sides of the support arm (10).

12. The method of using the generator rotor automated detection clamping device as described in claim 7, characterized in that: This device is used to test the DC resistance, AC impedance, AC withstand voltage, and insulation resistance of a generator rotor. The usage method includes the following steps: S1. By rotating the clamping screw (20), adjust the distance between the clamping screw (20) and the clamping surface (31) so that the distance is greater than 3 to 5 times the thickness of the conductor at the top of the rotor; S2. Clamp the two clamping devices onto the two conductors at the top of the rotor coil respectively. When clamping, first move the clamping device to place the conductor between the tightening screw (20) and the clamping surface (31). Then, bring the sliding member (80) and the contact (70) into contact with the conductor. Then rotate the tightening screw (20) to bring the tightening screw (20) into contact with the conductor. Then, quickly rotate the tightening screw (20) to push the conductor toward the clamping surface (31). During the pushing process, the sliding member (80) retracts toward the third sliding hole (18). During the process, the flow channels inside the receiving cavity (13), the feed hole (17) and the sliding column (81) are connected. The conductive paste in the receiving cavity (13) is squeezed by the third spring (15) and output from the flow channel inside the sliding column (81) to the clamping surface (31). S3. When the conductor abuts against the clamping surface (31), the flow channel inside the sliding column (81) and the feed hole (17) are misaligned and closed. S4. After the two clamping devices are installed, connect the current measuring wire (1) and voltage measuring wire (2) on the two clamping devices to the AC / DC integrated tester. S5. When testing DC resistance, AC impedance, AC withstand voltage and insulation resistance, use an integrated AC / DC tester. When testing insulation resistance and DC resistance, switch the integrated tester to DC voltage output. At this time, DC resistance is a high current test item. The current is stably transmitted to the rotor conductor through the conductive block (30) in the clamping device. When testing AC withstand voltage and AC impedance, switch the integrated tester to AC voltage output. At this time, AC impedance is a high voltage test item. The contact (70) is compressed and rebounds. The contact (70) maintains stable contact with the rotor conductor to ensure reliable transmission of voltage signal. Perform DC resistance, AC impedance, insulation resistance and AC withstand voltage tests in sequence, and record the test data; S5. After the test, keep the clamping surface (31) in contact with the conductor, rotate the tightening screw (20) in the opposite direction to make the tightening screw (20) move away from the conductor by a certain distance, and then quickly remove the clamping device.

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