Air gap measuring device

Abstract

The utility model relates to the technical field of measuring equipment, and discloses an air gap measuring device which comprises a first sliding rod, a second sliding rod and a fixing mechanism. The fixing mechanism is connected with the rotor to fix the first sliding rod and the second sliding rod, the first sliding rod and the second sliding rod slide in the circumferential direction of the rotor so that the first sliding rod and the second sliding rod can measure different positions of the air gap in the axial direction, and the first sliding rod and the second sliding rod are in sliding connection with the fixing mechanism in the length direction. The first sliding rod and the second sliding rod can stretch into the air gap by different depths, the technical problems that in the prior art, air gap measurement is not comprehensive, and the air gap measurement result is not reliable are solved, and the technical effects that air gap measurement is more comprehensive, and the measurement result is more accurate are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring equipment, in particular to an air gap measuring device. Background Art

[0002] The air gap is an important channel for the motor to establish a magnetic field. When installing or overhauling large generators, the stator and rotor air gaps are often carefully measured and adjusted. During normal operation of the motor, the air gap is usually measured in real time by electronic products such as air gap sensors and eddy current sensors. When the motor stops, different air gap measurement devices are often used for on-site measurement.

[0003] The existing conventional measurement is to use a homemade wedge-shaped wooden strip or an extra-long wedge-shaped feeler gauge for measurement. This measurement method is relatively rough and the measurement results are unreliable. The existing air gap measurement tools all use the contact to touch the air gap opening position, or the contact extends into the air gap to a specified depth to measure the width of the air gap. It is impossible to measure different depths and different positions of the air gap, and the measurement results are not comprehensive. Utility Model Content

[0004] The utility model aims to provide an air gap measuring device to solve the technical problems in the prior art that the air gap measurement is incomplete and the air gap measurement result is unreliable.

[0005] In order to solve the above technical problems, the utility model provides an air gap measuring device, comprising: a first sliding rod, a second sliding rod and a fixing mechanism;

[0006] The fixing mechanism extends along the circumference of the rotor, the fixing mechanism is connected to the rotor, the first sliding bar and the second sliding bar are respectively slidably connected to the fixing mechanism along the circumference of the rotor, the first sliding bar and the second sliding bar are hinged on the fixing mechanism, and the first sliding bar and the second sliding bar are respectively slidably connected to the fixing mechanism along the length direction.

[0007] In an optional embodiment, the fixing mechanism includes a fixing assembly and a support rod;

[0008] The fixing assembly is arranged to extend along the circumference of the rotor, the fixing assembly is connected to the rotor, one end of the support rod is slidably connected to the fixing assembly, the support rod is arranged perpendicular to the axis of the rotor, and the support rod is slidably connected to the first sliding rod and the second sliding rod respectively.

[0009] In an optional embodiment, an adjustment groove is provided on the support rod, the adjustment groove is provided through the support rod along the height direction of the support rod, the adjustment groove extends along the length direction of the support rod, and the first sliding rod and the second sliding rod are respectively slidably connected to the adjustment groove.

[0010] In an optional embodiment, it also includes an adjustment block;

[0011] The adjusting block is slidably connected to the adjusting slot, and the first sliding rod and the second sliding rod are respectively inserted into the adjusting block and slidably connected to the adjusting block.

[0012] In an optional embodiment, a locking member is also included;

[0013] The locking member is threadedly connected to the adjusting block, and the locking member abuts against the first sliding rod and the second sliding rod respectively.

[0014] In an optional embodiment, the fixing assembly includes a track bar and a connecting rope;

[0015] The track rod and the connecting rope are respectively wound around the rotor along the axial direction of the rotor, and the track rod is detachably connected to the connecting rope.

[0016] In an optional embodiment, a slide rail is provided in the track rod, and a sliding block is provided on a side of the support rod close to the rotor;

[0017] The slide rail is arranged on the surface of the track rod along the axial direction of the rotor, and the sliding block extends into the slide rail and is slidably connected with the slide rail.

[0018] In an optional embodiment, a first push head is provided at one end of the first sliding rod, and a second push head is provided at one end of the second sliding rod. The first push head and the second push head are arranged close to each other, and the first sliding rod and the second sliding rod respectively drive the first push head and the second push head to extend into the air gap.

[0019] In an optional embodiment, the distance from the first pusher head to the support rod is consistent with the distance from the second pusher head to the support rod.

[0020] In an optional embodiment, the first sliding rod and the second sliding rod are respectively provided with scales, and the scales are respectively extended along the length direction of the first sliding rod and the length direction of the second sliding rod.

[0021] The utility model provides an air gap measuring device, comprising a first slide bar, a second slide bar and a fixing mechanism; the fixing mechanism is connected to a rotor to fix the first slide bar and the second slide bar, the first slide bar and the second slide bar slide along the circumferential direction of the rotor so that the first slide bar and the second slide bar can measure different positions of the air gap along the axial direction, the first slide bar and the second slide bar are respectively slidably connected to the fixing mechanism along the length direction so that the first slide bar and the second slide bar can extend into the air gap at different depths, thereby solving the technical problems of incomplete air gap measurement and unreliable air gap measurement results in the prior art, and achieving the technical effect of more comprehensive air gap measurement and more accurate measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the air gap measuring device mentioned in the embodiment of the utility model;

[0023] Figure 2 It is a front view of the air gap measuring device mentioned in the embodiment of the utility model;

[0024] Figure 3 It is a top view of the air gap measuring device mentioned in the embodiment of the present utility model.

[0025] In the figure, 1-first sliding rod; 2-second sliding rod; 3-support rod; 4-adjusting slot; 5-sliding block; 6-track rod; 7-slide rail; 8-first push head; 9-second push head. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the specific implementation of the present utility model in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the related art, the air gap refers to the gap between the stator and the rotor. Taking the form of the stator wrapped around the rotor as an example, the air gap is measured using a homemade wedge-shaped wooden strip or an extra-long wedge-shaped feeler gauge. This measurement method is relatively rough and the measurement results are unreliable. The air gap measurement tools all use the contact to reach the air gap opening position, or the contact is extended into the air gap to a specified depth to measure the width of the air gap. It is impossible to measure different depths and different positions of the air gap, and the measurement results are not comprehensive.

[0029] In view of this, if Figure 1-Figure 3 As shown, some embodiments of the utility model provide an air gap measuring device, including: a first slide bar 1, a second slide bar 2 and a fixing mechanism; the fixing mechanism extends along the circumference of the rotor, the fixing mechanism is connected to the rotor, the first slide bar 1 and the second slide bar 2 are respectively slidably connected to the fixing mechanism along the circumference of the rotor, the first slide bar 1 and the second slide bar 2 are hinged on the fixing mechanism, and the first slide bar 1 and the second slide bar 2 are respectively slidably connected to the fixing mechanism along the length direction.

[0030] In the above embodiment, the first slide bar 1 and the second slide bar 2 can be made of metal, the cross-section of the first slide bar 1 and the second slide surface can be circular, the first slide bar 1 and the second slide bar 2 are respectively slidably connected to the fixing mechanism, wherein the sliding can include two modes, the first sliding mode is that the first slide bar 1 and the second slide bar 2 slide relative to the fixing mechanism along the axial direction of the rotor, and the second sliding mode includes that the first slide bar 1 and the second slide bar 2 slide relative to the fixing mechanism along their own length directions, respectively. The first sliding mode can make the first slide bar 1 and the second slide bar 2 contact different axial positions of the air gap, and the second sliding mode can make the first slide bar 1 and the second slide bar 2 contact different depths of the air gap, so that the first slide bar 1 and the second slide bar 2 can measure different circumferential positions of the air gap and different depths of the air gap, so that the measurement is more comprehensive and the measurement is more reliable.

[0031] The utility model provides an air gap measuring device, comprising a first slide bar 1, a second slide bar 2 and a fixing mechanism; the fixing mechanism is connected to a rotor to fix the first slide bar 1 and the second slide bar 2, the first slide bar 1 and the second slide bar 2 slide along the circumferential direction of the rotor so that the first slide bar 1 and the second slide bar 2 can measure different positions of the air gap along the axial direction, the first slide bar 1 and the second slide bar 2 are respectively slidably connected to the fixing mechanism along the length direction so that the first slide bar 1 and the second slide bar 2 can extend into the air gap at different depths, thereby solving the technical problems of incomplete air gap measurement and unreliable air gap measurement results in the prior art, and achieving the technical effect of more comprehensive air gap measurement and more accurate measurement results.

[0032] In an optional embodiment, the fixing mechanism includes a fixing assembly and a support rod 3; the fixing assembly is arranged to extend along the circumference of the rotor, the fixing assembly is connected to the rotor, one end of the support rod 3 is slidably connected to the fixing assembly, the support rod 3 is arranged perpendicular to the axis of the rotor, and the support rod 3 is slidably connected to the first sliding rod 1 and the second sliding rod 2 respectively.

[0033] In the above embodiment, the fixing component is wound around the rotor, and the fixing component can be made of a flexible material with elasticity. The fixing component can be in a circular ring shape. The fixing component is arranged close to the rotor surface along the circumferential direction of the rotor, wherein the fixing component can be attached to the rotating shaft of the rotor, and the fixing component can be firmly fixed to the rotating shaft of the rotor through its own elasticity. Since the fixing component is made of an elastic material, the fixing component can adapt to rotating shafts of different diameters. Furthermore, one end of the support rod 3 is arranged on the fixing component, and one end of the support rod 3 can be slidably connected to the fixing component so that the support rod 3 can slide relative to the fixed component, so that the support rod 3 drives the first sliding rod 1 and the second sliding rod 2 to rotate along the circumferential direction of the rotating shaft, so that different positions of the air gap can be measured along the circumferential direction of the rotating shaft, and the support rod 3 can be in a long strip shape, and the cross-section of the support rod 3 can be rectangular. The length direction of the support rod 3 is arranged perpendicular to the axis of the rotating shaft, so that the support rod 3 can rotate relative to the rotating shaft along the circumferential direction of the rotating shaft to achieve measurement of different positions of the air gap.

[0034] Optionally, the length direction of the support rod 3 and the axis of the rotor are located on different planes, and the length direction of the support rod 3 is not arranged toward the axis of the rotor. At this time, the support rod 3 can be deflected, thereby driving the first slide bar 1 and the second slide bar 2 to deflect, and the plane where the support rod 3 is deflected is still set perpendicular to the axis of the rotor. By sliding one end of the support rod 3 relative to the fixed component, the support rod 3 can be rotated relative to the fixed component, so that the support rod 3 can drive the first slide bar 1 and the second slide bar 2 to extend into air gaps of different diameters.

[0035] In an optional embodiment, an adjustment groove 4 is provided on the support rod 3, and the adjustment groove 4 is provided through the support rod 3 along the height direction of the support rod 3. The adjustment groove 4 is extended along the length direction of the support rod 3, and the first sliding rod 1 and the second sliding rod 2 are respectively slidably connected to the adjustment groove 4.

[0036] In the above embodiment, a penetrating adjustment groove 4 is provided on the support rod 3, and the adjustment groove 4 is in the shape of an elongated strip. The length direction of the adjustment groove 4 is arranged parallel to the length direction of the support rod 3, the center line of the adjustment groove 4 is arranged at the center line position of the support rod 3, and the width of the adjustment groove 4 is smaller than the width of the support rod 3, and the penetration direction of the adjustment groove 4 is parallel to the axial direction of the rotor, and the first slide bar 1 and the second slide bar 2 are both arranged in the adjustment groove 4, and the hinge position of the first slide bar 1 and the second slide bar 2 is located in the adjustment groove 4, and the first slide bar 1 and the second slide bar 2 are respectively slidably connected to the adjustment groove 4, wherein the first slide bar 1 and the second slide bar 2 can slide along the length direction of the adjustment groove 4 at the same time to adapt to air gaps of different diameters, and at the same time, the first slide bar 1 and the second slide bar 2 can slide relative to the adjustment groove 4 along their own length direction, so that the first slide bar 1 and the second slide bar 2 can simultaneously extend into the air gap to measure the positions of different depths of the air gap, and the measurement is more comprehensive.

[0037] In an optional embodiment, an adjustment block is further included; the adjustment block is slidably connected to the adjustment slot 4, and the first sliding rod 1 and the second sliding rod 2 are respectively inserted into the adjustment block and slidably connected to the adjustment block.

[0038] In the above embodiment, the adjustment block can be made of metal. The length of the adjustment block is smaller than the length of the adjustment slot 4. Figure 1 The upper and lower ends shown can extend out of the adjustment slot 4 and extend to both sides so that the adjustment block is slidably connected to the adjustment slot 4 and is firmly fixed. The adjustment block can also be slidably connected to the first slide bar 1 and the second slide bar 2 respectively, wherein the adjustment block can include a first adjustment block and a second adjustment block, and the first adjustment block and the second adjustment block are respectively provided with a first groove and a second groove with semicircular cross-sections, and the first groove and the second groove are set away from each other, the first groove is slidably connected to the first slide bar 1, and the second groove is slidably connected to the second slide bar 2, and the first adjustment block and the second adjustment block are moved away from each other by screwing a bolt between the first adjustment block and the second adjustment block, and the first slide bar 1 and the second slide bar 2 are respectively pressed against the inner wall of the adjustment slot 4 through the grooves to realize the fixation of the adjustment block and the fixation of the first slide bar 1 and the second slide bar 2.

[0039] Optionally, when it is necessary to adjust the depth of the first slide bar 1 and the second slide bar 2 extending into the air gap, the first adjustment block and the second adjustment block are loosened by removing the bolts between the first adjustment block, so that the first slide bar 1 can slide relative to the first groove and the second slide bar 2 can slide relative to the second groove.

[0040] In an optional embodiment, a locking piece is further included; the locking piece is threadedly connected to the adjustment block, and the locking piece abuts against the first sliding rod 1 and the second sliding rod 2 respectively.

[0041] In the above embodiment, the locking piece can be set as a locking bolt, and two locking pieces can be provided, and the two locking pieces are respectively arranged on the first adjusting block and the second adjusting block, and the two locking pieces are respectively abutted against the first slide bar 1 and the second slide bar 2 through threaded holes. After the bolt is screwed into the first adjusting block and the second adjusting block to press the first slide bar 1 and the second slide bar 2 against the inner wall of the adjusting groove 4, the locking pieces on the first adjusting block and the second adjusting block can be respectively adjusted to make the locking pieces abut against the first slide bar 1 and the second slide bar 2 respectively, so as to better fix the first slide bar 1 and the second slide bar 2, avoid the movement of the first slide bar 1 and the second slide bar 2 during the side face process, and make the measurement result more accurate.

[0042] In an optional embodiment, the fixing assembly includes a track rod 6 and a connecting rope; the track rod 6 and the connecting rope are respectively wound around the rotor along the axial direction of the rotor, and the track rod 6 and the connecting rope are detachably connected.

[0043] In the above embodiment, the track rod 6 can be semicircular, the track rod 6 can be made of metal to adapt to the rotor shaft, the track rod 6 can be replaced, and track rods 6 with different radii can adapt to shafts with different diameters. The connecting rope can be made of elastic material. The connecting rope can connect the two ends of the track rod 6 after the track rod 6 is stuck on the shaft, so that the connecting rope and the track rod 6 are surrounded by the shaft, so that the track rod 6 is more stably fixed on the shaft. After measuring the air gap on one side, if you want to change the measuring position, you can loosen the track rod 6 and adjust the installation position of the track rod 6 to achieve measurement of each position.

[0044] In an optional embodiment, a slide rail 7 is provided in the track rod 6, and a sliding block 5 is provided on the side of the support rod 3 close to the rotor; the slide rail 7 is provided on the surface of the track rod 6 along the axial direction of the rotor, and the sliding block 5 extends into the slide rail 7 and is slidably connected with the slide rail 7.

[0045] In the above embodiment, the slide rail 7 can be set on one side of the track rod 6, and the slide rail 7 can also be semicircular. The slide rail 7 is extended along the surface of the track rod 6. An opening is set on one side of the slide rail 7. The sliding block 5 enters the slide rail 7 through the opening and is slidably connected with the slide rail 7 so that the sliding block 5 can slide along the slide rail 7. Furthermore, the sliding block 5 can be welded on the end face of the support rod 3, and the support rod 3 slides relative to the track rod 6 through the sliding block 5, so that the support rod 3 drives the first slide bar 1 and the second slide bar 2 to different positions corresponding to the air gap.

[0046] In an optional embodiment, a first push head 8 is provided at one end of the first slide rod 1, and a second push head 9 is provided at one end of the second slide rod 2. The first push head 8 and the second push head 9 are arranged close to each other, and the first slide rod 1 and the second slide rod 2 respectively drive the first push head 8 and the second push head 9 to extend into the air gap.

[0047] In the above embodiment, the first push head 8 and the second push head 9 can both be made of metal material or high molecular polymer material, such as polyvinyl chloride. The first push head 8 and the second push head 9 are fixedly connected to the first slide bar 1 and the second slide bar 2 respectively, and the first push head 8 and the second push head 9 are respectively in contact with the inner walls on both sides of the air gap, wherein the distance from the first push head 8 to the end face of the first slide bar 1 is a fixed value, and the distance from the second push head 9 to the end face of the second slide bar 2 is a fixed value, that is, the first push head 8 and the second push head 9 can be set to a spherical shape respectively, and the distance between the end of the first slide bar 1 away from the first push head 8 and the end of the second slide bar 2 away from the second push head 9 is determined according to the distance between the two ends of the first slide bar 1 and the second slide bar 2 and the adjusting block respectively, and then the width of the air gap is determined in combination with the size of the first push head 8 and the second push head 9, so that the measurement result is more accurate.

[0048] In an optional embodiment, the distance from the first pusher head 8 to the support rod 3 is consistent with the distance from the second pusher head 9 to the support rod 3 .

[0049] In the above embodiment, the connecting line of the first push head 8 and the second push head 9 is arranged parallel to the length direction of the support rod 3, and the distance between the first push head 8 and the adjusting block is consistent with the distance between the second push head 9 and the adjusting block, so that the connecting line of the first push head 8 and the second push head 9 is parallel to the connecting line of the end of the first slide bar 1 away from the first push head 8 and the end of the second slide bar 2 away from the second push head 9, so that the two triangles above and below the adjusting block can be regarded as similar triangles, thereby judging the width of the air gap by the length of the first slide bar 1 and the second slide bar 2 on the upper and lower sides of the adjusting block, and by the distance between the end of the first slide bar 1 away from the first push head 8 and the end of the second slide bar 2 away from the second push head 9.

[0050] In an optional embodiment, scales are respectively provided on the first sliding bar 1 and the second sliding bar 2 , and the scales are respectively extended along the length direction of the first sliding bar 1 and the length direction of the second sliding bar 2 .

[0051] In the above embodiment, the scale set on the first slide bar 1 extends along the length direction of the first slide bar 1, and the scale on the second slide bar 2 extends along the length direction of the second slide bar 2. The scales on the first slide bar 1 and the scales on the second slide bar 2 are both used to judge the distances between the two ends of the first slide bar 1 and the two ends of the second slide bar 2 and the adjustment blocks respectively, so as to infer the width of the air gap through the distance between the end of the first slide bar 1 away from the first push head 8 and the end of the second slide bar 2 away from the second push head 9.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air gap measuring device for measuring the width of the air gap between a stator and a rotor, characterized in that: include: A first sliding rod (1), a second sliding rod (2) and a fixing mechanism; The fixing mechanism extends along the circumference of the rotor, the fixing mechanism is connected to the rotor, the first slide bar (1) and the second slide bar (2) are respectively slidably connected to the fixing mechanism along the circumference of the rotor, the first slide bar (1) and the second slide bar (2) are hinged on the fixing mechanism, and the first slide bar (1) and the second slide bar (2) are respectively slidably connected to the fixing mechanism along the length direction.

2. The air gap measuring device according to claim 1, characterized in that: The fixing mechanism comprises a fixing assembly and a support rod (3); The fixing assembly is arranged to extend along the circumference of the rotor, the fixing assembly is connected to the rotor, one end of the support rod (3) is slidably connected to the fixing assembly, the support rod (3) is arranged perpendicular to the axis of the rotor, and the support rod (3) is slidably connected to the first sliding rod (1) and the second sliding rod (2), respectively.

3. The air gap measuring device according to claim 2, characterized in that: The support rod (3) is provided with an adjustment groove (4), the adjustment groove (4) is arranged to penetrate the support rod (3) along the height direction of the support rod (3), the adjustment groove (4) is extended along the length direction of the support rod (3), and the first sliding rod (1) and the second sliding rod (2) are respectively slidably connected to the adjustment groove (4).

4. The air gap measuring device according to claim 3, characterized in that: Also included is a regulating block; The adjustment block is slidably connected to the adjustment slot (4); the first sliding rod (1) and the second sliding rod (2) are respectively inserted into the adjustment block and slidably connected to the adjustment block.

5. The air gap measuring device according to claim 4, characterized in that: Also includes a locking member; The locking piece is threadedly connected to the adjustment block, and the locking piece abuts against the first slide bar (1) and the second slide bar (2) respectively.

6. The air gap measuring device according to claim 2, characterized in that: The fixing assembly comprises a track rod (6) and a connecting rope; The track rod (6) and the connecting rope are respectively wound around the rotor along the axial direction of the rotor, and the track rod (6) and the connecting rope are detachably connected.

7. The air gap measuring device according to claim 6, characterized in that: A slide rail (7) is arranged inside the track rod (6), and a sliding block (5) is arranged on a side of the support rod (3) close to the rotor; The slide rail (7) is arranged on the surface of the track rod (6) along the axial direction of the rotor, and the sliding block (5) extends into the slide rail (7) and is slidably connected to the slide rail (7).

8. The air gap measuring device according to claim 3, characterized in that: A first pusher head (8) is disposed at one end of the first slide bar (1), and a second pusher head (9) is disposed at one end of the second slide bar (2). The first pusher head (8) and the second pusher head (9) are disposed close to each other. The first slide bar (1) and the second slide bar (2) respectively drive the first pusher head (8) and the second pusher head (9) to extend into the air gap.

9. The air gap measuring device according to claim 8, characterized in that: The distance between the first pusher head (8) and the support rod (3) is consistent with the distance between the second pusher head (9) and the support rod (3).

10. The air gap measuring device according to any one of claims 1 to 9, characterized in that: The first slide bar (1) and the second slide bar (2) are respectively provided with scales, and the scales are respectively extended along the length direction of the first slide bar (1) and the length direction of the second slide bar (2).

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