A convenient and universal generator air gap measuring tool

Abstract

This invention provides a convenient and universal generator air gap measuring tool. One end of a horizontally placed hollow rod is connected to a long lead screw passing through it via a nut, and the other end is welded to the outer side of the middle of a vertically placed metal cylinder. A spring is hung at the top of the metal cylinder, and a metal cylinder is hung below the spring. The metal cylinder can enclose the spring and the metal cylinder. A handle is welded to one end of the lead screw, and the other end can fix the metal cylinder inside the metal cylinder. The metal cylinder is locked by the lead screw, and the spring force causes the metal cylinder and the metal cylinder to press against both sides of the generator air gap, thereby determining the generator air gap length. This invention addresses the problems of traditional generator air gap measuring tools, such as easy damage, complex operation, and limited applicability, by providing a convenient and universal generator air gap measuring tool that is low in cost, easy to operate, and suitable for narrow areas.

Description

Technical Field

[0001] This utility model relates to the field of generator measuring tools, specifically to a convenient and universal generator air gap measuring tool. Background Technology

[0002] In the field of generator measurement tools, generator air gap measuring tools are key devices for detecting the safe operating distance of generator stator and rotor, which is crucial for the long-term stable operation of the unit and the assessment of maintenance quality. However, traditional generator air gap measuring tools have some shortcomings in use. Specifically: First, traditional generator air gap measuring tools generally use hydraulic transmission or lever amplification mechanisms, which have many parts and are prone to jamming or damage in the oily and dusty working environment of generators, increasing operating costs. Second, traditional generator air gap measuring tools require frequent replacement of different probes for different measurement objects, which leads to reduced measurement efficiency, complicated spare parts management, and increased human error. Finally, traditional generator air gap measuring tools have a large overall radial dimension, making them unable to be inserted in narrow areas, which limits the applicability of the measuring tools. Based on this, this utility model provides a convenient and universal generator air gap measuring tool. Utility Model Content

[0003] The purpose of this invention is to address the technical problems existing in the background art by providing a convenient and universal generator air gap measurement tool.

[0004] To achieve the above objectives, this utility model employs the following technical solution:

[0005] A convenient and universal generator air gap measuring tool comprises a horizontally placed hollow rod, one end of which is connected to a long lead screw passing through it via a nut, and the other end of which is welded to the outer side of the middle of a vertically placed metal cylinder. A spring is hung at the top of the metal cylinder, and a metal cylinder is hung below the spring. The metal cylinder can enclose the spring and the metal cylinder. A handle is welded to one end of the long lead screw, and the other end can fix the metal cylinder inside the metal cylinder. Two symmetrical vertical guide grooves are provided on the inner side of the metal cylinder, avoiding the direction of travel of the hollow rod. Several guide blocks matching the guide grooves are provided on the outer wall of the metal cylinder.

[0006] Preferably, the nut is stepped, with an external thread at its large diameter end that is threaded to the end of the hollow long rod, and an internal thread at its small diameter end that engages with the external thread on the outer surface of the long rod, so that the long rod can be screwed into and locked inside the hollow long rod by the nut.

[0007] Preferably, one end of the long lead screw that fixes the metal cylinder is an arc shape that can fit tightly against the surface of the metal cylinder, thereby stably fixing the metal cylinder.

[0008] Preferably, the height of the metal cylinder is less than the distance of the generator air gap to be measured, and the sum of the heights of the metal cylinder and the metal column is greater than the distance of the generator air gap to be measured.

[0009] Preferably, the end of the metal cylinder is spherical, so that it can fit the inner contour of the generator stator when measuring the air gap between the generator rotor and the stator.

[0010] Preferably, a buffer pad made of a flexible material with low elastic modulus is installed on the outer side of the ends of the metal cylinder and the metal tube. The thickness of the buffer pad does not exceed 0.1 mm, and the maximum deformation during compression does not exceed 0.02 mm, thereby providing buffer protection when the metal cylinder and the metal tube come into contact with the generator stator and rotor.

[0011] Preferably, the length of the metal cylinder is a known fixed value, and graduations are marked on the metal cylinder, with the graduations starting at the end of the metal cylinder.

[0012] Preferably, the outer surface of the handle is provided with anti-slip texture to increase the stability of the operator's grip during measurement and prevent the measuring tool from falling or shifting due to slippage.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] 1. Mechanical locking structure that is not easily damaged and easy to maintain: This utility model adopts a mechanical structure of spring pop-out and lead screw locking, which avoids the problem of complex transmission components jamming caused by oil and dust in the generator working environment, ensuring that the mechanism is not easily damaged and the components are easy to maintain.

[0015] 2. One universal probe, no need for frequent replacement: The probe of this utility model adopts a rigid cylindrical design, and its spherical end can adapt to stator profiles with different inner diameters. The air gap of the generator can be measured without replacing the probe. This not only improves the measurement efficiency and simplifies spare parts management, but also reduces the error caused by frequent replacement of probes.

[0016] 3. Compact design, suitable for narrow areas: This utility model adopts a straight rod design. The measuring part composed of a metal cylinder and a metal column has a small radial dimension, which can be easily inserted into narrow areas, ensuring a wider range of applicability of the measuring tool and improving the flexibility and comprehensiveness of measurement. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a front view of a convenient and universal generator air gap measuring tool according to this utility model.

[0019] Figure 2 This is a partially enlarged view of a convenient and universal generator air gap measuring tool according to this utility model.

[0020] Figure descriptions: 1. Handle; 2. Lead screw; 3. Nut; 4. Hollow rod; 5. Metal cylinder; 6. Spring; 7. Metal cylinder; 8. Buffer pad; 9. Guide groove; 10. Guide block. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1-2 The embodiments of this utility model will be described in further detail below.

[0022] like Figure 1-2 As shown, the assembly includes a handle 1, a long lead screw 2, a nut 3, a hollow long rod 4, a metal cylinder 5, a spring 6, a metal cylinder 7, a buffer pad 8, a guide groove 9, and a guide block 10. The long lead screw 2 passes through the interior of the hollow long rod 4. One end of the hollow long rod 4 has an internal thread that engages with the external thread of the large-diameter end of the stepped nut 3. The internal thread of the small-diameter end of the stepped nut 3 engages with the external thread on the outer surface of the long lead screw 2, allowing the long lead screw 2 to be screwed into and locked inside the hollow long rod 4. The other end of the hollow long rod 4 is welded to the outer side of the middle of the metal cylinder 5. One end of the long lead screw 2 is welded with a handle 1, and the other end can be fixed to the metal cylinder 7 inside the metal cylinder 5. The end of the long lead screw 2 that fixes the metal cylinder 7 is an arc shape that can fit tightly against the surface of the metal cylinder 7, thereby stably fixing the metal cylinder 7.

[0023] A spring 6 is suspended from the top of a metal cylinder 5, and a metal cylinder 7 is suspended from the bottom of the spring 6. The metal cylinder 5 can enclose the spring 6 and the metal cylinder 7. Two symmetrical vertical guide grooves 9 are provided on the inner side of the metal cylinder 5, avoiding the direction of travel of the hollow long rod 4. Several guide blocks 10, matching the guide grooves 9, are provided on the outer wall of the metal cylinder 7. The guide blocks 10 slide within the guide grooves 9 to ensure that the metal cylinder 7 moves in a straight line within the metal cylinder 5, thereby improving the accuracy of the air gap measurement. The inner diameter of the guide groove 9 is larger than the outer diameter of the spring 6. The height of the metal cylinder 5 is less than the distance of the generator air gap to be measured, and the sum of the heights of the metal cylinder 5 and the metal cylinder 7 is greater than the distance of the generator air gap to be measured. The metal cylinder 7 has a spherical end. A buffer pad 8 made of a flexible material with low elastic modulus is installed at the ends of the metal cylinder 7 and the metal cylinder 5. The buffer pad 8 has a thickness not exceeding 0.1 mm and a maximum deformation of not more than 0.02 mm under compression, thus providing buffer protection when the metal cylinder 7 and the metal cylinder 5 come into contact with the generator stator and rotor. The length of the metal cylinder 5 is a known fixed value, and graduations are marked on the metal cylinder 7, starting from the end of the metal cylinder 7.

[0024] The specific working principle is as follows: Measuring the air gap of a generator mainly refers to measuring the distance between the stator and rotor inside the generator. When it is necessary to use this measuring tool to measure the air gap of the generator:

[0025] First, outside the generator, the workers press the metal cylinder 7 into the top of the metal barrel 5, so that the spring 6 is compressed under the pressure of the metal cylinder 7. At this time, the handle 1 is rotated to send the long screw 2 into the metal barrel 5 to push against the metal cylinder 7, so as to fix the metal cylinder 7 in the metal barrel 5 and compress the spring 6. The length of the metal barrel 5 at this time is recorded as A.

[0026] Then, the fixed measuring device is inserted between the stator and rotor inside the generator, so that the metal cylinder 7 is aligned with the generator stator and the metal cylinder 5 is aligned with the generator rotor. At this time, the operator rotates the handle 1 in the opposite direction. When the long screw 2 releases the metal cylinder 7, the metal cylinder 7 will pop out under the action of the spring 6, so that the metal cylinder 5 abuts against the generator rotor and the metal cylinder 7 abuts against the generator stator.

[0027] Afterwards, rotate handle 1 forward again until the long screw 2 presses down on the metal cylinder 7 to fix the current extension length. Then, take out the entire measuring device and read the scale number B on the metal cylinder 7 at the connection between the metal cylinder 5 and the metal cylinder 7.

[0028] Finally, the length of the generator air gap is calculated as the length A of the metal cylinder 5 plus the graduation B on the metal cylinder 7 at the connection between the metal cylinder 5 and the metal cylinder 7. Since two buffer pads 8 with a total length of C are fixed at the ends of the metal cylinder 5 and the metal cylinder 7, the final length of the generator air gap is A+B+C.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the concept of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A convenient and universal generator air gap measuring tool, characterized in that: One end of a horizontally placed hollow rod (4) is connected to a long screw rod (2) that runs through it through a nut (3), and the other end is welded to the outer side of the middle of a vertically placed metal cylinder (5); a spring (6) is hung on the top of the metal cylinder (5), and a metal cylinder (7) is hung on the lower part of the spring (6). The metal cylinder (5) can wrap the spring (6) and the metal cylinder (7); a handle (1) is welded to one end of the long screw rod (2), and the other end can fix the metal cylinder (7) inside the metal cylinder (5); two symmetrical vertical guide grooves (9) are provided on the inner side of the metal cylinder (5) away from the direction of travel of the hollow rod (4), and several guide blocks (10) that match the guide grooves (9) are provided on the outer wall of the metal cylinder (7).

2. The convenient and universal generator air gap measuring tool according to claim 1, characterized in that: The nut (3) is stepped, with an external thread at its large diameter end that is threaded to the end of the hollow long rod (4), and an internal thread at its small diameter end that is threaded to the external thread on the outer surface of the long screw (2), so that the long screw (2) can be screwed into and locked inside the hollow long rod (4) by the nut (3).

3. The convenient and universal generator air gap measuring tool according to claim 1, characterized in that: The long screw (2) fixes one end of the metal cylinder (7) in an arc shape that can fit tightly against the surface of the metal cylinder (7), thereby stabilizing the metal cylinder (7).

4. The convenient and universal generator air gap measuring tool according to claim 1, characterized in that: The height of the metal cylinder (5) is less than the distance of the generator air gap to be measured, and the sum of the heights of the metal cylinder (5) and the metal cylinder (7) is greater than the distance of the generator air gap to be measured.

5. The convenient and universal generator air gap measuring tool according to claim 1, characterized in that: The end of the metal cylinder (7) is spherical, and it can fit the inner contour of the generator stator when measuring the air gap between the generator rotor and the stator.

6. The convenient and universal generator air gap measuring tool according to claim 1, characterized in that: A buffer pad (8) made of a flexible material with low elastic modulus is installed on the outer side of the ends of the metal cylinder (7) and the metal tube (5). The thickness of the buffer pad (8) is no more than 0.1 mm, and the maximum deformation during compression is no more than 0.02 mm, thereby providing buffer protection when the metal cylinder (7) and the metal tube (5) come into contact with the generator stator and rotor.

7. The convenient and universal generator air gap measuring tool according to claim 1, characterized in that: The length of the metal cylinder (5) is a known fixed value. Scales are marked on the metal cylinder (7), with the scales starting at the end of the metal cylinder (7).

8. A convenient and universal generator air gap measuring tool according to claim 1, characterized in that: The outer surface of the handle (1) is provided with anti-slip texture to increase the stability of the operator's grip during measurement and prevent the measuring tool from falling or shifting due to slipping.

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