Electric actuator worm torque detection device
By setting up a disc spring and a sensor in the worm torque detection device of the electric actuator, the problems of vulnerability of varistorable electrical components and deviation of detection results in the prior art are solved, and accurate torque detection and control are achieved.
Patent Information
- Application Number
- CN202421756775.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-24
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-07-24
AI Technical Summary
In existing electric actuators, varistor-electric components are prone to damage and are susceptible to temperature influence, resulting in large deviations in detection results, making it difficult to accurately detect the output torque of the force shaft.
An electric actuator worm torque detection device is designed. By setting a disc spring on the electric worm, and adjusting gaskets and corresponding displacement sensors and pressure sensors are respectively provided on both sides of the disc spring, the displacement and pressure amount of the deformation of the disc spring are measured respectively to ensure the accuracy of the detection results.
Through mutual comparison of the detection results, the accuracy of torque detection is ensured, the torque control of the electric actuator is ensured, and the valve damage caused by deviations in the detection results are avoided.
Smart Images
Figure CN222774157U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric actuator parts, in particular to a worm torque detection device for an electric actuator. Background Art
[0002] The valve electric actuator is a mechatronic industrial equipment used in conjunction with the valve to control the opening and closing of the valve. It mainly applies a certain torque to the valve to make the valve fully open or fully closed. The torque control principle is that when the torque required to open or close the valve under abnormal conditions is greater than the controllable torque set by the valve electric actuator, the torque structure will act and cut off the control circuit, causing the motor to stop, thereby protecting the valve from damage.
[0003] The output torque of the output shaft is a key parameter of an electric actuator. The current detection method is to set a pressure-sensitive electrical component on the measuring shaft, and display the output torque state of the output shaft by detecting the pressure change on the pressure-sensitive electronic component, so as to set the output shaft torque. The disadvantage of this structure is that the pressure-sensitive electronic component is very easy to be damaged and is easily affected by temperature, resulting in large deviations in the detection results. Summary of the invention
[0004] In view of the deficiencies in the prior art, the utility model provides a worm torque detection device for an electric actuator.
[0005] The technical solution provided by the utility model is:
[0006] A worm torque detection device for an electric actuator comprises an electric worm, one end of the electric worm is provided with a worm gear for meshing with the output shaft of the electric actuator motor, a first deep groove ball bearing and a second deep groove ball bearing are provided on the side of the worm gear, a disc spring is provided between the first deep groove ball bearing and the second deep groove ball bearing, an adjustment gasket is provided between the disc spring and the first deep groove ball bearing, one side of the adjustment gasket is cooperatedly connected with a displacement sensor, and a pressure sensor for transmitting a pressure signal is provided between the disc spring and the second deep groove ball bearing.
[0007] The worm gear is connected to the electric worm through a flat key.
[0008] An elastic retaining ring for the shaft is arranged on the outer side of the worm gear.
[0009] The electric worm is sleeved with a flameproof bushing.
[0010] The pressure sensor is in a circular ring shape and matches the contour of the contact end of the disc spring.
[0011] The beneficial effects of the utility model are as follows: the utility model arranges a disc spring on the electric worm, and arranges adjustment gaskets and corresponding displacement sensors and pressure sensors on both sides of the disc spring, respectively measures the displacement and pressure of the disc spring deformation, and compares the test results with each other to ensure the accuracy of the test results and guarantee the torque control of the electric actuator. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;
[0013] Figure 2 It is a schematic diagram of the installation of an embodiment of the utility model. DETAILED DESCRIPTION
[0014] The embodiments of the present utility model will be further described below in conjunction with the accompanying drawings.
[0015] like Figure 1-2 As shown, a worm torque detection device for an electric actuator includes an electric worm 1, a worm gear 2 for meshing with an output shaft 101 of an electric actuator motor is provided at one end of the electric worm 1, a first deep groove ball bearing 5 and a second deep groove ball bearing 10 are provided on the side of the worm gear 2, the first deep groove ball bearing 5 and the second deep groove ball bearing 10 are used to fix the electric worm 1 in the electric actuator, and the deep groove ball bearings reduce friction when the electric worm is axially displaced, thereby improving the accuracy of torque detection. A disc spring 6 is provided between the first deep groove ball bearing 5 and the second deep groove ball bearing 10, an adjustment gasket 7 is provided between the disc spring 6 and the first deep groove ball bearing 5, a displacement sensor 8 is connected to one side of the adjustment gasket 7, a pressure sensor 9 for transmitting a pressure signal is provided between the disc spring 6 and the second deep groove ball bearing 10, the displacement sensor 8 and the pressure sensor 9 are respectively electrically connected to an encoder or a host computer, and the encoder or the host computer outputs the corresponding pressure signal and displacement signal, and by comparison, the detection result is ensured to be accurate, thereby ensuring the torque control of the electric actuator.
[0016] In this embodiment, the worm gear 2 is connected to the electric worm 1 through a flat key, and an elastic retaining ring 4 for the shaft is provided on the outer side of the worm gear 2 to prevent axial movement of the worm gear 2 and ensure the stability of the transmission.
[0017] In this embodiment, a flameproof bushing 11 is sleeved on the electric worm 1. When in an inflammable and explosive working condition, the flameproof bushing 11 can effectively prevent the occurrence of explosion accidents and ensure safety.
[0018] In this embodiment, the pressure sensor 9 is in a circular ring shape, which is adapted to the contour of the contact end of the disc spring 6, so that the pressure sensor 9 can be completely attached to the disc spring 6, making the contact between the disc spring 6 and the pressure sensor 6 closer, and then can accurately sense the pressure applied by the disc spring 6, thereby improving the efficiency and accuracy of detecting torque.
[0019] The embodiments should not be regarded as limiting the present invention, and any non-creative improvements made based on the spirit of the present invention should be regarded as falling within the protection scope of the present invention.
Claims
1. A worm torque detection device for an electric actuator, characterized in that: It includes an electric worm, one end of which is provided with a worm gear for meshing with the output shaft of the electric actuator motor, a first deep groove ball bearing and a second deep groove ball bearing are provided on the side of the worm gear, a disc spring is provided between the first deep groove ball bearing and the second deep groove ball bearing, an adjustment gasket is provided between the disc spring and the first deep groove ball bearing, one side of the adjustment gasket is cooperated and connected with a displacement sensor, and a pressure sensor for transmitting a pressure signal is provided between the disc spring and the second deep groove ball bearing.
2. The electric actuator worm torque detection device according to claim 1, characterized in that: The worm gear is connected to the electric worm through a flat key.
3. The electric actuator worm torque detection device according to claim 1, characterized in that: An elastic retaining ring for the shaft is arranged on the outer side of the worm gear.
4. The electric actuator worm torque detection device according to claim 1, characterized in that: The electric worm is sleeved with a flameproof bushing.
5. The electric actuator worm torque detection device according to claim 1, characterized in that: The pressure sensor is in a circular ring shape and matches the contour of the contact end of the disc spring.