Tool for measuring air gap between stator and rotor of generator set

Abstract

The utility model relates to the technical field of measuring tools, in particular to a tool for measuring an air gap between a stator and a rotor of a generator set. Comprising an inner diameter telescopic measuring gauge and a handheld frame used in cooperation with the inner diameter telescopic measuring gauge. The handheld frame comprises two groups of semicircular cylinders which are buckled at the vertical rod end of the telescopic inner diameter measuring gauge, the two groups of semicircular cylinders are detachably connected, a handheld handle is fixed on one semicircular cylinder, and semicircular buckles which are buckled at the horizontal telescopic end of the telescopic inner diameter measuring gauge are fixedly mounted on the two semicircular cylinders. Compared with the prior art, the process of calculating the proportion of the wedge-shaped plate is reduced, and data processing is more concise. The chalk dust does not need to be scattered again during measurement every time, and only the locking knob needs to be locked / locked, so that the operation process is few, the operation is more convenient and rapid, and the measurement time cost is low; the novel measurement mode is simpler and more convenient, errors are effectively reduced, and data are more accurate.

Description

TECHNICAL FIELD

[0001] The utility model relates to measuring tool technical field especially relates to a tool for measuring air gap between stator and rotor of generator set. BACKGROUND

[0002] Stator rotor air gap is the important parameter of generator set operation, and the stator rotor gap is the important parameter of the center of the generator set and the unit swing control. The national standard and the manufacturer technical requirement are very high to the installation precision requirement of the positioning rib, and the specification requires that the gap between the stator rotor cannot exceed the design gap ± 4%. The traditional method for measuring the stator rotor air gap is to make a wedge-shaped plate according to a certain inclination ratio, and the surface of the wedge-shaped plate is smeared with chalk dust. The wedge-shaped plate is inserted between the stator rotor air gap and tightly attached, the wedge-shaped plate is taken out, the position of the chalk dust disappearance is observed, the thickness of the position is measured by using a vernier caliper, and the thickness of the wedge-shaped plate at the position of the chalk dust disappearance is calculated by the inclination ratio and the thickness of the wedge-shaped plate, and the data (the thickness of the wedge-shaped plate is the air gap between the stator rotor) is recorded.

[0003] The stator rotor is measured by using the wedge-shaped plate, the contact surface of the wedge-shaped plate and the stator rotor is three-point intersection (a, b, c), the chalk dust disappearance position is distributed on two surfaces, the error is large when the measurement is carried out by using the vernier caliper, the detection position is limited when the stator rotor air gap is checked, the measurement point is single, and the chalk dust needs to be covered again every time the measurement is carried out, the operation process is complicated, the measurement efficiency is low, the measurement point is multiple, the precision requirement is high, the installed quality is difficult to guarantee, the normal operation and the service life of the unit are affected, and the quality accident is easily buried. The chalk dust is scattered everywhere, which is not conducive to the protection of the stator rotor finished product and environmental protection.

[0004] Therefore, the utility model provides a tool for measuring the air gap between the stator and the rotor of the generator set, which is faster and improves the measurement accuracy when measuring the air gap. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the problems in the prior art and provides a tool for measuring the air gap between the stator and the rotor of the generator set.

[0006] In order to achieve the above object, the utility model adopts the following technical scheme:

[0007] A tool for measuring the air gap between the stator and the rotor of the generator set comprises an inner diameter telescopic gauge and a hand-held frame matched with the inner diameter telescopic gauge.

[0008] The hand-held frame comprises two groups of half cylinders buckled on the end of the vertical rod of the inner diameter telescopic gauge, the two groups of half cylinders are detachably connected, a hand-held handle is fixed on one half cylinder, and half buckles buckled on the horizontal telescopic end of the inner diameter telescopic gauge are fixed and installed on the two half cylinders.

[0009] Preferably, the half buckles of the two groups of half cylinders are not less than two and are arranged at equal intervals.

[0010] Preferably, a handle connector is detachably installed at the bottom end of the hand-held handle.

[0011] Preferably, the upper ends of the paired half buckles on the two half cylinders are rotationally connected.

[0012] Preferably, threads matched for use are arranged on the lower ends of the two groups of half cylinders, and nuts are jointly screwed on the two groups of threads.

[0013] Preferably, the upper end of the hand-held handle is a vertical mounting part attached to the end of the vertical rod of the inner diameter telescopic gauge, the middle part is an outwardly expanded part, and the lower end is a vertical connecting part.

[0014] Preferably, the outwardly expanded part is located below the middle part of the end of the vertical rod of the inner diameter telescopic gauge.

[0015] Preferably, one side wall of the two half cylinders is fixed with the hand-held handle, and the other lower end is fixed with a clamping handle, the lower end of the clamping handle is bent towards the hand-held handle, and an opening with a width greater than the diameter of the end of the vertical rod of the inner diameter telescopic gauge is arranged at the bent part of the clamping handle.

[0016] Compared with the prior art, the utility model provides a tool for measuring the air gap between the stator and the rotor of a generator set, which has the following beneficial effects:

[0017] 1. Compared with the traditional technology, the process of calculating the proportion of the wedge-shaped plate is reduced, and data processing is more concise.

[0018] 2. It is not necessary to sprinkle chalk every time of measurement, only the locking knob needs to be locked, the operation process is less, it is more convenient and rapid, and the measurement time cost is low.

[0019] 3. The three-point contact of the wedge-shaped plate may cause the vernier caliper not to be on the same working surface during measurement, the measurement data is inaccurate, the error is large after conversion by the proportional method, the new measurement method is more simple, effectively reduces the error, and the data is more accurate.

[0020] 4. The operation is convenient, time is saved, and the construction period can be saved to a certain extent during air gap inspection.

[0021] The other advantages, objects and features of the present application will be in part apparent and in part pointed out below in the specification. In some aspects, the present application will be obvious from the following detailed description in conjunction with the accompanying drawings. In other aspects, the present application will be readily utilised based on the description in this summary to enable practitioners to realize the present application and to apply the teachings of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a perspective view of the present application.

[0023] Figure 2 is a front view and a side view of the present application Figure 1

[0024] Figure 3 is a partial view of the present application at A Figure 1

[0025] Figure 4 is a partial view of the present application at B Figure 2

[0026] Figure 5 is an exploded view of the present application

[0027] Figure 6 is a view of the present application showing the connection between the handle and the grip

[0028] Figure 7 is a front view and a perspective view of the present application showing the handle and the grip in a cooperating state

[0029] Figure 8 is a view of the present application showing the measurement of the air gap of the wedge-shaped plate in the background art

[0030] In the figure: 1, inner diameter telescopic gauge; 2, hand-held frame; 201, semi-cylinder; 202, semi-circular buckle; 203, hand-held handle; 204, grip; 205, screw thread; 206, nut; 3, clamping handle; 4, wedge-shaped plate; 5, stator; 6, rotor. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application. Figures 1-8 It should be apparent that the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0032] In order to solve the problems in the prior art, the present embodiment provides a tool for measuring the air gap between the stator and the rotor of a generator set, which comprises an inner diameter telescopic gauge 1 and a hand-held frame 2 used in conjunction with the inner diameter telescopic gauge 1.

[0033] ​​​The inner diameter telescopic gauge 1 comprises a vertical rod end (i.e. a micrometer screw), a fixed sleeve at the lower side of the vertical rod end, a differential cylinder at the lower end of the fixed sleeve, a force measuring device (knob) at the lower end of the differential cylinder, a telescopic measuring claw at the upper end of the vertical rod end, and a lengthening locking rod which can extend the length of the vertical rod end.

[0034] The hand-held frame 2 comprises two groups of half-cylinders 201 buckled on the vertical rod end of the inner diameter telescopic gauge 1, and the two groups of half-cylinders 201 are detachably connected, one half-cylinder 201 is fixed with a hand-held handle 203, and both half-cylinders 201 are fixedly installed with half-cylinder buckles 202 buckled on the horizontal telescopic end of the inner diameter telescopic gauge 1. The two half-cylinder buckles 202 are combined into a whole circular buckle.

[0035] According to the above technical solution:

[0036] In use, first, according to the design of the air gap of the stator 5 and the rotor 6, select the appropriate specification of the inner diameter telescopic gauge 1, and then carry out zero adjustment and calibration. Then install the inner diameter telescopic gauge 1 on the hand-held frame 2. After installation, the upper end of the vertical rod end (micrometer screw part) of the inner diameter telescopic gauge 1 is buckled by the two groups of half-cylinders 201; the inner diameter telescopic gauge 1 is fixed by the horizontal telescopic end (measuring claw). Under the cooperation of the two groups of half-cylinders 201 and the two half-cylinder buckles 202, the inner diameter telescopic gauge 1 is firmly embedded on the hand-held frame 2 and cannot be lifted and deflected relative to the hand-held frame 2. Holding the hand-held handle 203 can insert the telescopic measuring end of the inner diameter telescopic gauge 1 into the air gap between the stator 5 and the rotor 6 for measurement.

[0037] Measurement process:

[0038] 1. Lock the gauge at the minimum range position.

[0039] 2. Put the hand-held fixed frame vertically into the air gap between the stator 5 and the rotor 6.

[0040] 3. The telescopic head of the gauge reaches the predetermined measurement point position.

[0041] 4. The two ends of the telescopic gauge are perpendicular to the inner and outer surfaces of the stator 5 and the rotor 6.

[0042] 5. Cancel the locking by the lengthening rod locking knob.

[0043] 6. The two end heads of the telescopic gauge are tightly attached to the surfaces of the stator 5 and the rotor 6.

[0044] 7. Lock again by the lengthening rod locking knob.

[0045] 8. Hold the hand-held fixed frame tightly and rotate it 90° to the left / right, and then take it out slowly (to prevent collision with the inner and outer surfaces of the stator 5 and the rotor 6 during the taking-out process due to the too small air gap).

[0046] 9, the vernier caliper is used for measuring the length of the two ends of the gauge and recording (the data is the size of the air gap between the stator 5 and the rotor 6).

[0047] 10, analysis and processing adjustment.

[0048] Compared with the prior art, the process of calculating the proportion of the wedge-shaped plate is reduced, and the data processing is more concise.

[0049] It is not necessary to sprinkle chalk every time, only to lock the knob, the operation process is less, more convenient and rapid, and the measurement time cost is low.

[0050] The three-point contact of the wedge-shaped plate may cause the vernier caliper not to be on the same working surface during measurement, the measurement data is inaccurate, and the error is large after conversion by the proportion method. The new measurement method is more simple, effectively reduces the error, and the data is more accurate.

[0051] In a further embodiment of the present scheme, the inner diameter telescopic gauge 1 is generally provided with a plurality of measuring claws. Therefore, in the present embodiment, the half-cylinder buckles 202 of the two groups of half-cylinders 201 are not less than two groups and are arranged at equal intervals. Each pair of half-cylinders 201 corresponds to a group of measuring claws, and preferably, the half-cylinders 201 are arranged in two pairs. This makes the buckling between the hand-held frame 2 and the inner diameter telescopic gauge 1 more stable.

[0052] In a further embodiment of the present scheme, the bottom end of the hand-held handle 203 is detachably connected with a handle connector 204. For example, the bottom end of the hand-held handle 203 is provided with a threaded hole 205, and the upper end of the handle connector 204 is provided with a threaded column. The threaded hole 205 is matched with the threaded column to detachably connect the hand-held handle 203 with the handle connector 204. The hand-held handle 203 is lengthened to adapt to the measurement of air gaps at different depths.

[0053] In a further embodiment of the present scheme, as shown in Figs. 1 to 4, Figure 3 , Figs. 5 to 8, Figure 4 , Figs. 9 to 12, Figure 5 the upper ends of the two half-cylinder buckles 202 on the two half-cylinders 201 are rotatably connected. The two groups of half-cylinders 201 form a whole, preventing them from being lost during storage. It is also convenient for the two half-cylinder buckles 202 to abut and buckle on the horizontal measurement end of the inner diameter telescopic gauge 1.

[0054] In a further embodiment of the present scheme, the sidewalls of the lower ends of the two groups of half-cylinders 201 are provided with matching threads 205, and a nut 206 is screwed on the two threads 205. The threads 205 on the two half-cylinders 201 together form a set of smooth threads 205. After the inner diameter telescopic gauge 1 is inserted into the hand-held frame 2, the nut 206 is screwed, the two half-cylinders 201 are tightly connected, and the inner diameter telescopic gauge 1 is firmly inserted into the hand-held frame 2. The two half-cylinder buckles 202 are rotatably connected,

[0055] In a further embodiment of the present application, the upper end of the hand handle 203 is a vertical mounting portion attached to the vertical rod end of the inner diameter telescopic gauge 1, the middle portion is an outwardly expanded portion, and the lower end is a vertical connecting portion. The upper end of the hand handle 203 is attached to the vertical rod end of the inner diameter telescopic gauge 1, which can avoid the interference between the hand handle 203 and the stator 5 and rotor 6 when the hand handle 203 is inserted into the air gap between the stator 5 and the rotor 6. The middle portion is outwardly expanded, so that there is a gripping gap between the hand holding portion of the hand handle 203 and the inner diameter telescopic gauge 1, which is convenient to hold when in use.

[0056] In a further embodiment of the present application, the outwardly expanded portion is located below the middle portion of the vertical rod end of the inner diameter telescopic gauge 1. This can ensure that the horizontal measuring end of the inner diameter telescopic gauge 1 can be inserted into the air gap between the stator 5 and the rotor 6 to a sufficient depth, so as to ensure the measurement accuracy.

[0057] In a further embodiment of the present application, another connection structure of two half-cylinders 201 is provided in the present embodiment. One of the two half-cylinders 201 is fixed with a hand handle 203 on the side wall, and the other is fixed with a clamping handle 3 at the lower end. The lower end of the clamping handle 3 is bent towards the hand handle 203, and an opening with a width greater than the diameter of the vertical rod end of the inner diameter telescopic gauge 1 is arranged on the bent portion of the clamping handle 3. In this way, one half-cylinder 201 is opened, the inner diameter telescopic gauge 1 is inserted, and then the other half-cylinder 201 is buckled. The lower end of the clamping handle 3 is buckled on the hand handle 203, and they are held together, so that the inner diameter telescopic gauge 1 can be buckled on the hand holder 2. Compared with the need to screw the thread 205, this way is more convenient and faster.

[0058] The above description is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacements or changes according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

[0059] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0060] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model.

Claims

1. A tool for measuring the air gap between the stator and rotor of a generator set, characterized by, The utility model relates to a hand-held inner diameter telescopic gauge, which comprises an inner diameter telescopic gauge (1) and a hand-held frame (2) matched with the inner diameter telescopic gauge (1). The hand-held frame (2) comprises two groups of half cylinders (201) buckled on the vertical rod ends of the inner diameter telescopic gauge (1), the two groups of half cylinders (201) are detachably connected, one half cylinder (201) is fixed with a hand-held handle (203), and the two half cylinders (201) are both fixed with half buckles (202) buckled on the horizontal telescopic ends of the inner diameter telescopic gauge (1).

2. A tool for measuring the air gap between the stator and rotor of a generator set according to claim 1, characterized in that, The half buckles (202) of the two groups of half cylinders (201) are not less than two groups and are arranged at equal intervals.

3. A tool for measuring the air gap between the stator and rotor of an electrical generator as defined in claim 1, wherein, The bottom end of the hand-held handle (203) is detachably provided with a handle connector (204).

4. A tool for measuring the air gap between the stator and rotor of an electrical generator as defined in claim 1, wherein, The upper ends of the paired half buckles (202) of the two half cylinders (201) are rotatably connected.

5. A tool for measuring the air gap between the stator and rotor of an electrical generator as defined in claim 4, wherein, The lower ends of the two groups of half cylinders (201) are provided with matched threads (205) on the side walls, and the two groups of threads (205) are jointly screwed with nuts (206).

6. A tool for measuring the air gap between the stator and rotor of an electrical generator as defined in claim 1, wherein, The upper end of the hand-held handle (203) is a vertical mounting part close to the vertical rod end of the inner diameter telescopic gauge (1), the middle part is an outward expansion part, and the lower end is a vertical connecting part.

7. A tool for measuring the air gap between the stator and rotor of an electrical generator as defined in claim 6, wherein, The outward expansion part is located below the middle part of the vertical rod end of the inner diameter telescopic gauge (1).

8. A tool for measuring the air gap between the stator and rotor of an electrical generator as defined in claim 4 wherein, One of the two half cylinders (201) is fixed with a hand-held handle (203) on the side wall, and the other is fixed with a clamping handle (3) at the lower end, the clamping handle (3) is bent and extended towards the hand-held handle (203) at the lower end, and the bent part of the clamping handle (3) is provided with an opening with a width greater than the diameter of the vertical rod end of the inner diameter telescopic gauge (1).

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