Large direct current motor rotating shaft bearing pressure eccentricity detection device

Abstract

The utility model relates to the field of motors, in particular to a large-scale direct-current motor rotating shaft bearing pressure eccentricity detection device which comprises a detection cabin, a conveying frame for moving a rotating shaft is horizontally and slidably arranged in the detection cabin, and a supporting frame is vertically and slidably arranged at the inlet portion of the detection cabin. A rotating oil cylinder for driving the rotating shaft to rotate is arranged at the opposite end of the inlet part of the detection cabin, a pressurizing unit is horizontally and slidably arranged at the top end in the detection cabin, a temperature rising unit is arranged on the side wall in the detection cabin, and a detection unit coaxial with the rotating shaft is fixedly arranged on the inner wall of the inlet part of the detection cabin; the bearing pressure eccentricity detection device for the rotating shaft of the large-scale direct-current motor can pressurize each part of the rotating shaft and detect the bearing capacity of each position, and can be matched with a rotating oil cylinder to detect the static and dynamic eccentricity of the rotating shaft, so that the eccentricity of the rotating shaft in a pressurized state can be conveniently recorded; and the stability and the strength of the rotating shaft during working are determined.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to a detection device for the pressing eccentricity of a large DC motor rotating shaft bearing. Background Art

[0002] After the production and manufacturing of the motor rotating shaft are completed, it is necessary to detect its bearing capacity to determine the weighing capacity and working stability of the rotating shaft. The current detection methods cannot detect multiple positions of the rotating shaft, and at the same time, the existing detection methods can only detect the rotating shaft in a single state, resulting in a certain gap between the detection results and the actual situation. Therefore, how to overcome the above existing technical problems and defects has become a key problem to be solved. Summary of the Utility Model

[0003] The invention purpose of the utility model is to overcome the defects described in the background art, so as to realize a detection device for the pressing eccentricity of a large DC motor rotating shaft bearing. The device can pressurize each part of the rotating shaft, detect the bearing capacity of each position, and at the same time can cooperate with the rotating oil cylinder to detect the static and dynamic eccentricities of the rotating shaft, so as to determine the stability and strength of the rotating shaft during operation.

[0004] To achieve the above invention purpose, the technical solution of the utility model is: a detection device for the pressing eccentricity of a large DC motor rotating shaft bearing, including a detection chamber. A conveying frame for moving the rotating shaft is horizontally slidably arranged inside the detection chamber. A support frame is vertically slidably arranged at the inlet part of the detection chamber. A rotating oil cylinder for driving the rotating shaft to rotate is arranged at the opposite end of the inlet part of the detection chamber. A pressurizing unit is horizontally slidably arranged at the top end inside the detection chamber. A temperature rise unit for heating the detection chamber is arranged on the inner side wall inside the detection chamber. A detection unit coaxial with the rotating shaft is fixedly arranged on the inner wall of the inlet part of the detection chamber.

[0005] In the above detection device for the pressing eccentricity of a large DC motor rotating shaft bearing, a cabin door is hingedly arranged at the inlet part of the detection chamber, and one side cabin wall of the detection chamber is made of transparent material. The situation inside the cabin can be directly viewed, which is convenient for observing and recording the detection process.

[0006] In the above detection device for the pressing eccentricity of a large DC motor rotating shaft bearing, a chute is opened along the length direction on the inner bottom plate of the detection chamber, and the conveying frame moves in the chute. A first bidirectional motor is fixedly arranged inside the detection chamber at the end of the conveying frame. The output end of the first bidirectional motor is fixedly provided with a first screw rod that penetrates the conveying frame and is threadedly connected to the conveying frame. At least one group of rollers is rotatably arranged at the top end of the conveying frame, and the rollers are located at the bottom ends on both sides of the rotating shaft. It can support the rotating shaft, transport the rotating shaft into the detection chamber, and assist the rotating shaft to rotate during detection.

[0007] In the above-mentioned large DC motor bearing pressing eccentricity detection device, the cross-section of the support frame is in an L-shaped structure. At the top end inside the detection chamber, a first hydraulic cylinder is vertically and fixedly arranged, and the extending end of the first hydraulic cylinder is fixedly arranged with the top end of the support frame. A conveyor belt for rotatably supporting the rotating shaft is arranged on the support frame. It can passively convey the rotating shaft and at the same time support the end of the rotating shaft during detection, which is convenient for detecting the pressing eccentricity of the rotating shaft.

[0008] In the above-mentioned large DC motor bearing pressing eccentricity detection device, the rotating cylinder fixes the rotating shaft and drives the rotating shaft to rotate through a three-jaw chuck fixedly arranged at its output end. It can fix the end of the rotating shaft through the three-jaw chuck and at the same time drive the rotating shaft to rotate during detection.

[0009] In the above-mentioned large DC motor bearing pressing eccentricity detection device, the pressing unit includes a second hydraulic cylinder horizontally sliding along the length direction at the top end inside the detection chamber. At the top end inside the detection chamber, a second bidirectional motor is fixedly arranged, and the output end of the second motor is fixedly arranged with a second screw rod passing through the second hydraulic cylinder and threadedly arranged with the second hydraulic cylinder. The extending end of the second hydraulic cylinder is fixedly arranged with an arc-shaped plate imitating the shape of the rotating shaft, and a plurality of rotating wheels are rotatably arranged in the concave part of the arc-shaped plate. The movable pressing unit can press various parts of the rotating shaft, so as to detect the static and dynamic eccentricities of the rotating shaft and determine the stability and strength of the rotating shaft during operation.

[0010] In the above-mentioned large DC motor bearing pressing eccentricity detection device, the temperature rise unit includes a heating chamber opened on the side wall of the detection chamber, and an electric heating sheet is arranged inside the heating chamber. It can change the temperature inside the detection chamber, simulate the temperature conditions in which the rotating shaft is actually located during operation, and thus assist in detecting the rotating shaft.

[0011] In the above-mentioned large DC motor bearing pressing eccentricity detection device, the detection unit includes a laser displacement sensor coaxially arranged with the rotating shaft on the inner wall of the cabin door. It can detect the displacement of the end of the rotating shaft, which is convenient for recording the eccentricity of the rotating shaft under the pressing state, and further determine the stability and strength of the rotating shaft during operation.

[0012] Compared with the prior art, the large DC motor bearing pressing eccentricity detection device of the present utility model has at least the following beneficial effects:

[0013] 1. The large DC motor bearing pressing eccentricity detection device of the present utility model is provided with a conveying frame and a support frame for moving the rotating shaft, which can support the rotating shaft, at the same time transport the rotating shaft into the detection chamber, and can assist the rotating shaft to rotate during detection.

[0014] 2. The large DC motor rotor bearing pressing eccentricity detection device of the present utility model is provided with a rotary oil cylinder for driving the rotary shaft to rotate, a pressing unit slidably arranged at the top of the detection chamber, and a detection unit, which can press various parts of the rotary shaft, detect the bearing capacity of each position, and at the same time cooperate with the rotary oil cylinder to detect the static and dynamic eccentricities of the rotary shaft, facilitate the recording of the eccentricity of the rotary shaft under the pressing state, and further determine the stability and strength of the rotary shaft during operation.

[0015] 3. The large DC motor rotor bearing pressing eccentricity detection device of the present utility model is provided with a temperature rise unit for heating the detection chamber, which can change the temperature inside the detection chamber and simulate the temperature conditions in which the rotary shaft is actually located during operation, so as to assist in detecting the rotary shaft.

[0016] 4. The large DC motor rotor bearing pressing eccentricity detection device of the present utility model is provided with a cabin wall made of transparent material, which can directly view the situation inside the cabin and facilitate the observation and recording of the detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall structural schematic diagram of the large DC motor rotor bearing pressing eccentricity detection device of the present utility model;

[0018] Figure 2 is the internal structural schematic diagram of the large DC motor rotor bearing pressing eccentricity detection device of the present utility model;

[0019] Figure 3 is the schematic diagram of the position of the runner of the large DC motor rotor bearing pressing eccentricity detection device of the present utility model;

[0020] Figure 4 is the schematic diagram of the position of the rotary oil cylinder of the large DC motor rotor bearing pressing eccentricity detection device of the present utility model.

[0021] In the figure: 1, detection chamber; 2, conveying rack; 3, support rack; 4, rotary oil cylinder;

[0022] 5, pressing unit; 51, second hydraulic cylinder; 52, second bidirectional motor; 53, second screw rod; 54, arc plate; 55, runner;

[0023] 6, temperature rise unit; 61, temperature rise chamber; 62, electric heating sheet;

[0024] 7, detection unit; 71, laser displacement sensor;

[0025] 8, cabin door; 9, chute; 10, first bidirectional motor; 11, first screw rod; 12, roller; 13, first hydraulic cylinder; 14, conveyor belt; 15, three-jaw chuck. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The large DC motor rotor bearing pressing eccentricity detection device of the present utility model will be described in more detail below in conjunction with the attached drawings and through specific implementation manners.

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0028] See Figures 1-4 , the large DC motor rotor bearing pressing eccentricity detection device of this embodiment can pressurize various parts of the rotating shaft, detect the bearing capacity of each position, and at the same time cooperate with the rotary oil cylinder 4 to detect the static and dynamic eccentricities of the rotating shaft, which is convenient to record the eccentricity of the rotating shaft under the pressurized state, and then determine the stability and strength of the rotating shaft during operation. In this embodiment, it mainly includes a detection chamber 1, a hatch 8 is hingedly arranged at the inlet of the detection chamber 1, and one side wall of the detection chamber 1 is made of transparent material. A control module is also provided. A conveying rack 2 for moving the rotating shaft is horizontally slidably arranged inside the detection chamber 1, a chute 9 is opened along the length direction on the inner bottom plate of the detection chamber 1, and the conveying rack 2 moves in the chute 9. A first bidirectional motor 10 is fixedly arranged inside the detection chamber 1 at the end of the conveying rack 2, and the first bidirectional motor 10 is centrally controlled by the control module. The output end of the first bidirectional motor 10 is fixedly provided with a first screw rod 11 that penetrates through the conveying rack 2 and is threadedly connected to the conveying rack 2. At least one group of rollers 12 are rotatably arranged at the top of the conveying rack 2, and the rollers 12 are located at the bottom ends on both sides of the rotating shaft.

[0029] A support frame 3 is vertically slidably arranged at the inlet of the detection chamber 1, and the cross section of the support frame 3 is in an L-shaped structure. A first hydraulic cylinder 13 is vertically fixedly arranged at the top inside the detection chamber 1, and the first hydraulic cylinder 13 is centrally controlled by the control module. The extending end of the first hydraulic cylinder 13 is fixedly arranged with the top of the support frame 3. A conveyor belt 14 for supporting the rotating shaft is rotatably arranged on the support frame 3.

[0030] When performing a pressure-bearing test on the completed rotating shaft, first open the hatch 8, and then control the first bidirectional motor 10 to work through the control module. The first bidirectional motor 10 drives the first screw 11 to rotate, thereby moving the conveying rack 2 to the side of the support rack 3 in the chute 9. Carry the rotating shaft onto the conveying rack 2 and the support rack 3, and then control the first bidirectional motor 10 to reverse through the control module, so that the conveying rack 2 moves the rotating shaft into the inspection chamber 1. At this time, the conveyor belt 14 is used to assist in moving the rotating shaft. When the rotating shaft completely enters the inspection chamber 1, close the hatch 8, and at this time, the pressure-bearing eccentricity test can be carried out. During the test, the movement of the conveying rack 2 can be controlled at any time through the control module, so as to change the length that can be detected when the rotating shaft is detected.

[0031] When performing static or dynamic tests on the rotating shaft, the first hydraulic cylinder 13 can be controlled to work through the control module, so that the support rack 3 moves downward to suspend the end of the rotating shaft, thereby testing the rotating shaft. At the same time, during dynamic testing, the roller 12 is used to assist the rotation of the rotating shaft. When testing the rotating shaft, the situation inside the chamber can be directly viewed through the transparent chamber wall, which is convenient for observing and recording the testing process.

[0032] In order to detect the pressure-bearing capacity of the rotating shaft. Refer to Figures 2-4 , in this embodiment, a rotary cylinder 4 for driving the rotation of the rotating shaft is provided at the opposite end of the inlet part of the inspection chamber 1, and the rotary cylinder 4 is centrally controlled by the control module. The rotary cylinder 4 fixes and drives the rotation of the rotating shaft through a three-jaw chuck 15 fixedly arranged at its output end. The three-jaw chuck 15 is a mature existing technology and will not be elaborated here. A pressurizing unit 5 is horizontally slidably arranged at the top end inside the inspection chamber 1. The pressurizing unit 5 includes a second hydraulic cylinder 51 horizontally slidably arranged along the length direction at the top end inside the inspection chamber 1. The second hydraulic cylinder 51 is centrally controlled by the control module. A second bidirectional motor 52 is fixedly arranged at the top end inside the inspection chamber 1, and the second bidirectional motor 52 is centrally controlled by the control module. The output end of the second motor is fixedly provided with a second screw 53 that penetrates through the second hydraulic cylinder 51 and is threadedly arranged with the second hydraulic cylinder 51. The extending end of the second hydraulic cylinder 51 is fixedly provided with an arc-shaped plate 54 that is shaped to fit the rotating shaft, and a plurality of rotating wheels 55 are rotatably arranged in the recessed part of the arc-shaped plate 54.

[0033] A detection unit 7 coaxial with the rotating shaft is fixedly arranged on the inner wall of the inlet part of the inspection chamber 1. The detection unit 7 includes a laser displacement sensor 71 coaxially arranged on the inner wall of the hatch 8 and the rotating shaft. The laser displacement sensor 71 feeds back signals to the control module. A temperature rise unit 6 for heating the inspection chamber 1 is arranged on the side wall inside the inspection chamber 1. The temperature rise unit 6 includes a temperature rise chamber 61 opened on the side wall of the inspection chamber 1, and an electric heating sheet 62 is arranged inside the temperature rise chamber 61. The electric heating sheet 62 is centrally controlled by the control module.

[0034] When the rotating shaft completely enters the detection chamber 1, the end of the rotating shaft abuts against the three-jaw chuck 15. At this time, the control module controls the three-jaw chuck 15 to clamp the rotating shaft to fix the position of the rotating shaft. When performing static pressure detection, the control module controls the second hydraulic cylinder 51 to work. The second hydraulic cylinder 51 drives the arc plate 54 to move downward, so that the runner 55 abuts against the rotating shaft. At this time, the rotating shaft can be pressurized through the arc plate 54 and the runner 55, and the laser displacement sensor 71 is used to detect and record the position change of the rotating shaft. When it is necessary to perform pressure detection on other positions, the control module controls the second bidirectional motor 52 to work, so that the second bidirectional motor 52 drives the second screw rod 53 to rotate, thereby moving the second hydraulic cylinder 51 to realize the change of the pressurizing position.

[0035] When performing dynamic pressure detection, the control module controls the rotary cylinder 4 to work. The rotary cylinder 4 drives the three-jaw chuck 15 to drive the rotating shaft to rotate. At this time, pressure detection can be performed on the rotating shaft. During this process, the friction force is reduced through the runner 55 to avoid damage to the rotating shaft. At the same time, the control module can control the electric heating sheet 62 to work to change the temperature in the detection chamber 1 to simulate the temperature conditions when the rotating shaft actually works, so as to assist in performing pressure detection on the rotating shaft.

[0036] The usage method of the large DC motor rotating shaft pressure eccentricity detection device of the present utility model: First, open the hatch 8, and then the control module controls the first bidirectional motor 10 to drive the first screw rod 11 to rotate, and moves the conveying frame 2 to the side of the support frame 3 in the sliding groove 9. Carry the rotating shaft onto the conveying frame 2 and the support frame 3, and then the control module controls the first bidirectional motor 10 to reverse, so that the conveying frame 2 drives the rotating shaft to move into the detection chamber 1. At this time, the conveyor belt 14 is used to assist in moving the rotating shaft. When the rotating shaft completely enters the detection chamber 1, the end of the rotating shaft abuts against the three-jaw chuck 15. At this time, the control module controls the three-jaw chuck 15 to clamp the rotating shaft to fix the position of the rotating shaft. During the detection, the control module can control the movement of the conveying frame 2 at any time, so as to change the length that can be detected when the rotating shaft is detected. At the same time, when the rotating shaft is subjected to static or dynamic detection, the control module controls the first hydraulic cylinder 13 to work, so that the support frame 3 moves downward to suspend the end of the rotating shaft, so as to detect the rotating shaft.

[0037] When performing static pressure detection, the control module controls the second hydraulic cylinder 51 to work. The second hydraulic cylinder 51 drives the arc plate 54 to move downward, so that the runner 55 abuts against the rotating shaft. At this time, the rotating shaft can be pressurized through the arc plate 54 and the runner 55, and the laser displacement sensor 71 is used to detect and record the position change of the rotating shaft. When it is necessary to perform pressure detection on other positions, the control module controls the second bidirectional motor 52 to work, so that the second bidirectional motor 52 drives the second screw rod 53 to rotate, thereby moving the second hydraulic cylinder 51 to realize the change of the pressurizing position.

[0038] When performing dynamic pressure detection, the control module controls the rotation oil cylinder 4 to work. The rotation oil cylinder 4 drives the three-jaw chuck 15 to drive the rotating shaft to rotate. At this time, the rotating shaft can be subjected to pressure detection. At the same time, during dynamic detection, the roller 12 assists the rotation of the rotating shaft. The friction is reduced by the runner 55 to avoid damage to the rotating shaft. At the same time, the control module can control the electric heating sheet 62 to work to change the temperature in the detection chamber 1, simulating the temperature conditions in which the rotating shaft is actually working, so as to assist in the pressure detection of the rotating shaft. When detecting the rotating shaft, the situation inside the chamber can be directly viewed through the transparent chamber wall, which is convenient for observing and recording the detection process.

[0039] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the field to which the present utility model belongs. The use of words such as "a" or "an" in the specification and claims of this application does not necessarily mean a limitation in quantity. Words such as "comprising" or "including" mean that the elements or items appearing before the word cover the elements or items listed after the word and their equivalents, without excluding other elements or items. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0040] The exemplary embodiments of the present utility model have been described in detail above with reference to the preferred embodiments. However, those skilled in the art can understand that, without departing from the concept of the present utility model, various modifications and variations can be made to the above specific embodiments, and various combinations can be made to the technical features and structures proposed by the present utility model, without exceeding the protection scope of the present utility model.

Claims

1. A large DC motor bearing press-fitting eccentricity detection device, characterized in that: It includes a detection chamber (1), inside which there is a conveying rack (2) with a moving rotating shaft horizontally slidably arranged. At the inlet part of the detection chamber (1), there is a support rack (3) vertically slidably arranged. At the opposite end of the inlet part of the detection chamber (1), there is a rotary oil cylinder (4) for driving the rotating shaft to rotate. Horizontally slidably arranged at the top end inside the detection chamber (1) is a pressurizing unit (5). Arranged on the side wall inside the detection chamber (1) is a temperature rise unit (6) for heating the detection chamber (1). Fixedly arranged on the inner wall of the inlet part of the detection chamber (1) is a detection unit (7) coaxial with the rotating shaft.

2. The large DC motor bearing pressing eccentricity detection device according to claim 1, wherein: A hatch door (8) is hingedly arranged at the inlet part of the detection chamber (1), and one side wall of the detection chamber (1) is made of a transparent material.

3. The large DC motor bearing press-fitting eccentricity detection device according to claim 1, characterized in that: On the inner bottom plate of the detection chamber (1), a chute (9) is opened along its length direction. The conveying rack (2) moves in the chute (9). Inside the detection chamber (1) at the end of the conveying rack (2), a first bidirectional motor (10) is fixedly arranged. At the output end of the first bidirectional motor (10), a first screw rod (11) is fixedly arranged, which penetrates through the conveying rack (2) and is threadedly connected with the conveying rack (2). At least one set of rollers (12) is rotatably arranged at the top end of the conveying rack (2), and the rollers (12) are located at both bottom ends on both sides of the rotating shaft.

4. The large DC motor bearing press eccentricity detection device according to claim 1, characterized in that: The cross-section of the support rack (3) is in an L-shaped structure. Vertically fixedly arranged at the top end inside the detection chamber (1) is a first hydraulic cylinder (13). The extending end of the first hydraulic cylinder (13) is fixedly arranged with the top end of the support rack (3). A conveyor belt (14) for supporting the rotating shaft is rotatably arranged on the support rack (3).

5. The large DC motor bearing pressing eccentricity detection device according to claim 1, characterized in that: The rotary oil cylinder (4) fixes the rotating shaft and drives the rotating shaft to rotate through a three-jaw chuck (15) fixedly arranged at its output end.

6. The large DC motor bearing pressing eccentricity detection device according to claim 1, characterized in that: The pressurizing unit (5) includes a second hydraulic cylinder (51) horizontally slidably arranged along the length direction at the top end inside the detection chamber (1). Fixedly arranged at the top end inside the detection chamber (1) is a second bidirectional motor (52). At the output end of the second bidirectional motor, a second screw rod (53) is fixedly arranged, which penetrates through the second hydraulic cylinder (51) and is threadedly arranged with the second hydraulic cylinder (51). The extending end of the second hydraulic cylinder (51) is fixedly arranged with an arc-shaped plate (54) arranged in imitation of the rotating shaft. A plurality of rotating wheels (55) are rotatably arranged in the concave part of the arc-shaped plate (54).

7. The large DC motor bearing press-fitting eccentricity detection device according to claim 1, characterized in that: The temperature rise unit (6) includes a temperature rise cavity (61) opened on the side wall of the detection chamber (1), and an electric heating sheet (62) is arranged inside the temperature rise cavity (61).

8. The large DC motor bearing press-fitting eccentricity detection device according to claim 2, characterized in that: The detection unit (7) includes a laser displacement sensor (71) arranged coaxial with the rotating shaft on the inner wall of the hatch door (8).

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