Radial clearance measuring shaft end adapter sleeve structure and measuring method

Abstract

The present application belongs to the technical field of measurement fixture design, and particularly relates to a structure and a method for measuring the radial clearance of a shaft end. The structure comprises a shaft sleeve (1) for inserting the output shaft of a rotary transformer, a circular contact surface (2) arranged at the front end of the shaft sleeve (1), the contact surface (2) being tapered on the side facing the rotary transformer, a connecting portion (3) arranged in the middle of the shaft sleeve (1), symmetrical holes (4) arranged on the connecting portion (3) above the horizontal center line, the holes (4) being provided with soft ropes for connecting weights, and threaded holes arranged on the side surface of the shaft sleeve (1) for passing through a locking screw (5) to press the output shaft of the rotary transformer. The present application is suitable for measuring the radial clearance of rotary transformers and sensors with small shaft extension and for reading the radial clearance of the root of a rotating shaft.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of measuring fixture design. Specifically relates to a kind of radial clearance measurement shaft end adapter sleeve structure and measurement method. BACKGROUND

[0002] As Figure 3 As shown in the prior art, in the shaft end radial clearance measurement fixture of rotary transformer, shaft end force is controlled by shaft end adapter sleeve, and the soft rope is connected with the weight, and the lengthened measuring rod is contacted with the rotary shaft to read the dial value. Since the measuring space size left for the shaft end support sleeve rear part of the adapter sleeve structure is small, the special measuring rod is narrow and slender, and the strength and rigidity are not enough. Deformation is easily caused. In measurement use, friction is easily generated with shaft end face, which affects the measurement accuracy of product. SUMMARY

[0003] The purpose of the present application is to provide a kind of radial clearance measurement shaft end adapter sleeve structure and measurement method, which can read the radial clearance of rotary shaft root and has small shaft extension size, and has radial clearance measurement of rotary transformer and sensor with shaft end force size requirement.

[0004] The technical scheme of the present application is as follows:

[0005] A kind of radial clearance measurement shaft end adapter sleeve structure, comprising:

[0006] The shaft sleeve 1 of rotary transformer output shaft is inserted, the front end of the shaft sleeve 1 is provided with a circular contact surface 2, the contact surface 2 is tapered on the side facing the rotary transformer, the shaft sleeve 1 is provided with a connecting part 3 in the middle, the connecting part 3 is symmetrically punched 4 on the horizontal plane through the center, the hole 4 is provided with a soft rope connected with the weight, and the threaded hole is opened on the side surface of the shaft sleeve 1, and the threaded hole is opened on the side surface of the shaft sleeve 1.

[0007] The taper of the contact surface 2 on the side facing the motor is 0.5 degrees to 1 degree from the center to the outer circle.

[0008] The connecting part 3 is a disc, and the disc is symmetrically punched 4 on the horizontal plane through the center.

[0009] The connecting part 3 is an ear arranged on the left and right sides of the shaft sleeve 1.

[0010] The side of the contact surface 2 away from the motor is tapered.

[0011] The outer circle edge of the contact surface 2 has a length.

[0012] A kind of radial clearance measurement shaft end adapter sleeve structure measurement method, comprising:

[0013] The shaft sleeve 1 is centrally inserted into the output shaft of the rotary transformer, and the contact surface 2 is attached to the end surface of the rotary transformer. The measurement head is on the side of the contact surface 2 facing the rotary transformer, and the horizontal deflection amount of the end surface of the shaft end adapter sleeve is read.

[0014] A radial gap measurement shaft end adapter sleeve structure measurement method, comprising:

[0015] The shaft sleeve 1 is centrally inserted into the output shaft of the rotary transformer, and the contact surface 2 is attached to the end surface of the rotary transformer. The measurement head is on the side of the contact surface 2 facing the rotary transformer, and the horizontal deflection amount of the end surface of the shaft end adapter sleeve is read.

[0016] The beneficial effects of the present application are:

[0017] The present application designs a new shaft end adapter sleeve structure Figure 1 The original adapter sleeve single positioning force position size H structure is changed to an integrated design combined with the measurement surface. The measurement point is closer to the root of the output shaft end, and closer to the design measurement requirements of the product. The combined process structure greatly improves the performance, precision, and service life of the tool. The new structure of the shaft end adapter sleeve measurement surface is Figure 2 The new method of reading the horizontal deflection amount of the end surface of the shaft end adapter sleeve by the measurement head is added to the previous radial gap measurement method of reading the horizontal displacement amount by the measurement head. The horizontal displacement amount can be amplified due to the trigonometric relationship between the end surface measurement point and the radial displacement amount of the horizontal output shaft. It better discriminates the true value of the output shaft measurement. It is suitable for radial gap measurement of rotary transformers and sensors that require reading the radial gap of the shaft root and have small shaft extension size. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram of the shaft end adapter sleeve assembly structure;

[0019] Among them, the shaft sleeve (1); the contact surface (2); the connecting part (3); the hole (4); the locking screw (5).

[0020] H is the force size required to measure the distance from the shaft end, the shaft end adapter sleeve main body, and the locking screw for compression, and the two small holes are for tying the weight soft rope.

[0021] Figure 2 is a local enlarged view of the measurement surface.

[0022] Figure 3 is a schematic diagram of the original tool measurement sleeve and special measurement rod structure. DETAILED DESCRIPTION

[0023] The radial gap measurement shaft end adapter sleeve structure size of the present application is as shown in Figure 1 , comprising:

[0024] The shaft sleeve 1 of the plug-in rotary transformer output shaft, the front end of the shaft sleeve 1 is provided with a circular contact surface 2, the surface of the contact surface 2 facing the rotary transformer is tapered, the middle part of the shaft sleeve 1 is provided with a connecting part 3, the connecting part 3 is symmetrically punched 4 on the horizontal plane passing through the center, the hole 4 is tied with a soft rope connected with a weight, the side of the shaft sleeve 1 is provided with a threaded hole, and the tight screw 5 is pressed against the rotary transformer output shaft through the threaded hole. In use, the rotary transformer output shaft is inserted into the shaft sleeve 1 for limiting, and the right end surface is close to the root of the rotary transformer output shaft. The tight screw 5 on the internal thread is pressed to position without movement, and at least two tight screws 5 are used to ensure the fastening effect, and the threaded holes are opened on the side. The two holes 4 are tied with a soft rope connected with a weight respectively, and the measuring surface can contact the dial gauge to read the numerical value.

[0025] In order to prevent the contact surface 2 from interfering with the end surface of the transformer during measurement, the taper of the surface of the contact surface 2 facing the motor is 0.5-1 degrees from the center to the outer circle.

[0026] In actual use, in order to facilitate processing, the connecting part 3 can be a disc, and the disc is symmetrically punched 4 on the horizontal plane passing through the center. Alternatively, in order to save materials, the connecting part 3 can be an ear arranged on the left and right sides of the shaft sleeve 1.

[0027] In order to increase the structural strength of the adapter sleeve, the surface of the contact surface 2 away from the motor is tapered.

[0028] The contact surface 2 has a length, that is, the contact surface 2 has a thickness at the thinnest part of the outer circle, so that the second measurement method of the application can conveniently measure the head clamping position.

[0029] The adapter sleeve structure is used to provide two measurement methods different from the prior art:

[0030] The first radial gap measurement shaft end adapter sleeve structure measurement method comprises:

[0031] The rotary transformer output shaft is inserted into the center of the shaft sleeve 1, the surface of the contact surface 2 facing the rotary transformer is attached to the end surface of the rotary transformer, the measuring head is on the side of the contact surface 2 facing the rotary transformer, and the horizontal deflection amount of the end surface of the shaft end adapter sleeve is read.

[0032] This method can directly read the horizontal deflection amount of the contact point, and there is no need to worry about the problem that the physical space is small due to the short output shaft, and the measuring head is difficult to measure.

[0033] The second radial gap measurement shaft end adapter sleeve structure measurement method comprises:

[0034] The rotary transformer output shaft is inserted into the center of the shaft sleeve 1, the surface of the contact surface 2 facing the rotary transformer is attached to the end surface of the rotary transformer, the measuring head is on the side of the contact surface 2 facing the rotary transformer, and the horizontal deflection amount of the end surface of the shaft end adapter sleeve is read.

[0035] The method enlarges the outer circle of the contact surface 2, which makes it easier to select the measuring point. The horizontal displacement of the outer circle of the shaft end adapter can be measured at will, which is more convenient than before.

[0036] The structure of the application is compact and easy to process. Since the end surface measuring point has a trigonometric function relationship with the horizontal output shaft, the horizontal movement can be amplified. It better discriminates the true value of the output shaft measurement. It approaches the design requirements.

[0037] Working principle:

[0038] The inner hole of the shaft end adapter is installed in the rotating transformer shaft, and the right end surface is close to the root of the rotating shaft. The set screw on the internal thread is used for pressing and positioning. Two small holes are respectively connected to the soft rope of the weight. When a certain mass of weight is applied on one side, the shaft end adapter and the rotating transformer shaft are deviated to the same side. The dial gauge reading of the measuring point on the measuring surface is the radial displacement of the output shaft (the measuring point and the radial displacement of the rotating shaft have a trigonometric function offset), and vice versa.

[0039] The above is only a specific embodiment of the application. The detailed description of the application is not exhaustive, and the conventional technology is not described in detail. However, the protection scope of the application is not limited to this. Any changes or replacements that can be easily thought of by those skilled in the art within the technical scope disclosed by the application should be covered within the protection scope of the application. The protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A radial gap measuring shaft end adapter sleeve structure, characterized by, It includes: The shaft sleeve (1) of the plug-in rotary transformer output shaft, the front end of the shaft sleeve (1) is provided with a circular contact surface (2), the surface of the contact surface (2) facing the rotary transformer is tapered, the middle part of the shaft sleeve (1) is provided with a connecting part (3), the connecting part (3) is symmetrically punched (4) on the horizontal plane passing through the center, the hole (4) is provided with a soft rope connected with the connecting weight, and the side surface of the shaft sleeve (1) is provided with a threaded hole, and the tight screw (5) is pressed into the rotary transformer output shaft through the threaded hole; in use, the rotary transformer output shaft is inserted into the shaft sleeve (1) for limiting, the right end surface is close to the root of the rotary transformer output shaft, the tight screw (5) on the internal thread is used for pressing and positioning, and there is no movement; in use, the tight screw (5) is at least two, and the threaded hole is opened on the side surface; the two holes (4) are respectively provided with a soft rope connected with the connecting weight, and the contact surface (2) can contact the dial gauge to read the value; The taper of the surface of the contact surface (2) facing the motor is 0.5-1 degrees from the center to the outer circle.

2. The shaft end adapter sleeve structure for radial gap measurement according to claim 1, wherein The connecting part (3) is a disc, and the disc is symmetrically punched (4) on the horizontal plane passing through the center.

3. The shaft end adapter sleeve structure for radial gap measurement according to claim 1, wherein The connecting part (3) is an ear arranged on the left and right sides of the shaft sleeve (1).

4. The shaft end adapter sleeve structure for radial gap measurement according to claim 1, wherein The surface of the contact surface (2) away from the motor is tapered.

5. The shaft end adapter sleeve structure for radial gap measurement according to claim 1, wherein The outer circle edge of the contact surface (2) has a length.

6. A method of measuring a radial gap measuring shaft end adapter sleeve structure, characterized by, The method for the shaft end adapter sleeve structure for radial gap measurement according to any one of claims 1-5, comprising: The rotary transformer output shaft is inserted into the center of the shaft sleeve (1), the surface of the contact surface (2) facing the rotary transformer is attached to the end surface of the rotary transformer, the measuring head is on the outer circle edge of the contact surface (2), and the horizontal displacement amount of the outer circle of the shaft end adapter sleeve is read.

7. A method of measuring a radial gap measuring shaft end adapter sleeve structure, characterized by, The method for the shaft end adapter sleeve structure for radial gap measurement according to any one of claims 1-5, comprising: The rotary transformer output shaft is inserted into the center of the shaft sleeve (1), the surface of the contact surface (2) facing the rotary transformer is attached to the end surface of the rotary transformer, the measuring head is on the outer circle edge of the contact surface (2), and the horizontal displacement amount of the outer circle of the shaft end adapter sleeve is read.

Images