Sliding bearing shaft vibration measuring structure for large motor
By introducing adjustment screw sleeves and locking nuts into the sliding bearings, the problem of the shaft displacement sensor cannot be adjusted is solved, and the distance between the shaft displacement sensor and the outer wall of the rotor is flexible, improving measurement accuracy and operation Convenience.
Patent Information
- Application Number
- CN202420907302.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-29
AI Technical Summary
In the prior art, the shaft displacement sensor cannot be adjusted after being installed inside the sliding bearing, resulting in the inability to accurately measure the vibration value of the rotor and cannot accurately reflect the operation of the equipment.
A large motor sliding bearing shaft vibration measurement structure is designed, and the adjustment screw sleeve and lock nut are installed by forming a vertical screw through hole on the top plate of the outer shell of the bearing main body, allowing the adjustment screw sleeve to be rotated. To adjust the distance between the inductive end of the shaft displacement sensor and the outer wall surface of the rotor.
The flexible adjustment of the distance between the shaft displacement sensor and the outer wall of the rotor is achieved, which improves the accuracy of measurement and simplifies the adjustment process.
Smart Images
Figure CN222163282U_ABST
Abstract
Description
Technical field:
[0001] The utility model relates to the technical field related to shaft testing, and more specifically to a shaft vibration measuring structure for a sliding bearing used for a large motor. Background technology:
[0002] As one of the important supporting components in rotating machinery, sliding bearings are widely used in various large motors.
[0003] The vibration value of the rotor can reflect the operation of the equipment more intuitively. Usually, it is necessary to arrange a shaft displacement sensor in the area inside the bearing close to the rotor to monitor the vibration value of the rotor. In order to accurately measure the vibration value of the rotor, the distance between the shaft displacement sensor and the rotor (shaft) needs to be precisely adjusted. However, the shaft displacement sensor is installed inside the bearing, and the outer wall of the bearing is far away from the shaft. After the bearing is installed, the shaft displacement sensor cannot be adjusted, resulting in a large distance between it and the outer wall of the rotor, making it impossible to accurately measure the vibration value of the shaft. Utility model content:
[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide a sliding bearing shaft vibration measuring structure for large motors, which only requires rotating and adjusting the threaded sleeve to change the distance between the sensing end of the shaft displacement sensor and the outer wall surface of the rotor, thereby improving the measurement accuracy and being easy to adjust.
[0005] The solution of the utility model to solve the technical problem is:
[0006] A sliding bearing shaft vibration detection structure for a large motor, comprising a bearing body, wherein a rotor is installed in the bearing body;
[0007] At least one vertical threaded through hole is formed on the top plate of the outer shell of the bearing body, an adjusting threaded sleeve is threaded in the vertical threaded through hole, the inner end of the adjusting threaded sleeve extends into the outer shell, an axial displacement sensor is installed at the inner end of the adjusting threaded sleeve, and the sensing end of the axial displacement sensor is close to the top surface of the corresponding part of the rotor.
[0008] The top of the adjusting threaded sleeve extends out of the top surface of the top plate of the outer shell of the bearing body and is threaded with a locking nut, and the bottom surface of the locking nut is pressed against the top surface of the top plate of the outer shell of the bearing body.
[0009] The outstanding effects of the utility model are:
[0010] It only needs to rotate the adjusting screw sleeve to change the distance between the sensing end of the shaft displacement sensor and the outer wall surface of the rotor, thereby improving the measurement accuracy and being easy to adjust. Description of the drawings:
[0011] Figure 1 It is a partial top view of the utility model when it is installed as a whole;
[0012] Figure 2 yes Figure 1 A partial enlarged view of . Specific implementation method:
[0013] For example, see Figure 1 to Figure 2 As shown, a sliding bearing shaft vibration detection structure for a large motor includes a bearing body 10, in which a rotor 20 is installed;
[0014] At least one vertical screw connection hole is formed on the top plate of the outer shell of the bearing body 10. In this embodiment, one vertical screw connection hole is formed, and the adjusting screw connection sleeve 30 is screwed in the vertical screw connection hole. The adjusting screw connection sleeve 30 is an elongated tube. The inner end of the adjusting screw connection sleeve 30 extends into the outer shell, and the outer end of the adjusting screw connection sleeve 30 extends out of the top surface of the top plate of the outer shell of the bearing body 10.
[0015] An axial displacement sensor 40 is installed at the inner end of the adjusting threaded sleeve 30 , and the sensing end of the axial displacement sensor 40 is close to the top surface of the corresponding position of the rotor 20 .
[0016] The top of the adjusting threaded sleeve 30 extends out of the top surface of the top plate of the outer shell of the bearing body 10 and is threaded with a locking nut 1, and the bottom surface of the locking nut 1 is pressed against the top surface of the top plate of the outer shell of the bearing body 10. The locking nut 1 is used to achieve a firm fixing effect of the adjusting threaded sleeve 30.
[0017] Furthermore, an internal thread is formed on the inner side wall of the bottom end of the adjusting threaded sleeve 30 , the external thread of the connecting sleeve 31 is threaded on the internal thread, and the shaft displacement sensor 40 is threaded on the internal thread of the connecting sleeve 31 .
[0018] Furthermore, a radially extending edge 32 is formed on the outer side wall of the bottom end of the connecting sleeve body 31 , and the top surface of the radially extending edge 32 is pressed against the bottom end surface of the adjusting threaded sleeve 30 .
[0019] Furthermore, a first locking nut 41 is threadedly connected to the middle portion of the shaft displacement sensor 40 , and a top surface of the first locking nut 41 is pressed against a bottom end surface of the connecting sleeve body 31 .
[0020] Furthermore, the lower portion of the shaft displacement sensor 40 extends out of the bottom end of the connecting sleeve 31 .
[0021] The electrical connection line of the shaft displacement sensor 40 can extend upward along the adjusting screw sleeve 30 to the top surface of the top plate of the outer shell of the bearing body 10 and be electrically connected to a control host installed outside.
[0022] When it is in use, when the control host does not display the sensing signal data of the shaft displacement sensor 40, it means that the distance between the sensing end of the shaft displacement sensor 40 and the outer wall surface of the rotor 20 is large, and the locking nut 1 can be loosened as needed, and then the adjusting screw sleeve 30 is rotated to move the adjusting screw sleeve 30 downward, so that the sensing end of the shaft displacement sensor 40 is close to the outer wall surface of the rotor 20 (that is, the main shaft), and the control host can obtain the corresponding data. When adjusting, it always observes the control host. When data appears on it, it means that the adjustment is in place. At this time, just tighten the locking nut 1. It is adjusted on the outside of the bearing body 10, which makes it easy to adjust and operate.
[0023] The above description is only a preferred embodiment of the utility model. It is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A shaft vibration detection structure for a sliding bearing used in a large motor, comprising a bearing body (10), characterized in that: A rotor (20) is installed in the bearing body (10); At least one vertical screw-connected through hole is formed on the top plate of the outer shell of the bearing body (10), an adjusting screw-connected sleeve (30) is screwed into the vertical screw-connected through hole, the inner end of the adjusting screw-connected sleeve (30) extends into the outer shell, a shaft displacement sensor (40) is installed at the inner end of the adjusting screw-connected sleeve (30), and the sensing end of the shaft displacement sensor (40) is close to the top surface of the corresponding position of the rotor (20).
2. The structure for measuring shaft vibration of a sliding bearing for a large motor according to claim 1, characterized in that: The top of the adjusting threaded sleeve (30) extends out of the top surface of the top plate of the outer shell of the bearing body (10) and is threaded with a locking nut (1), and the bottom surface of the locking nut (1) is pressed against the top surface of the top plate of the outer shell of the bearing body (10).
3. The structure for measuring shaft vibration of sliding bearings for large motors according to claim 1, characterized in that: An internal thread is formed on the inner side wall of the bottom end of the adjusting threaded sleeve (30), the external thread of the connecting sleeve (31) is threaded on the internal thread, and a shaft displacement sensor (40) is threaded on the internal thread of the connecting sleeve (31).
4. The structure for measuring shaft vibration of a sliding bearing for a large motor according to claim 3, characterized in that: A radially extending edge (32) is formed on the outer side wall of the bottom end of the connecting sleeve body (31), and the top surface of the radially extending edge (32) is pressed against the bottom end surface of the adjusting threaded sleeve (30).
5. The structure for measuring shaft vibration of a sliding bearing for a large motor according to claim 3, characterized in that: A first locking nut (41) is threadedly connected to the middle of the shaft displacement sensor (40), and the top surface of the first locking nut (41) is pressed against the bottom end surface of the connecting sleeve (31).
6. The structure for measuring shaft vibration of sliding bearings for large motors according to claim 3, characterized in that: The lower part of the shaft displacement sensor (40) extends out of the bottom end of the connecting sleeve (31).