A torque testing device for a rotary actuator
By designing a highly compatible torque testing device, the problems of model adaptation and angle adjustment of rotary actuators were solved, realizing multi-model compatibility and torque testing at different angles for high-torque valve rotary actuators, thus improving testing efficiency and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LUOYANG REASTAR TRANSMISSION
- Filing Date
- 2025-05-21
- Publication Date
- 2026-06-02
AI Technical Summary
Existing technologies lack torque testing devices that can be compatible with various types of rotary actuators and can test the forward and reverse output torque at different angles, especially for rotary actuators of high-torque valves.
A torque testing device was designed, including a test bench, an input spline shaft, a spline sleeve, and a transition spline. Torque is transmitted through spline engagement, and the spline sleeve is connected to the stepped surface of the input spline shaft by a locating pin or locating plate, allowing the spline sleeve to automatically disengage after unlocking. Combined with a moving fixture, the spline sleeve can be easily lifted using the lever principle to achieve torque testing at different angles.
It achieves multi-model compatibility of high-torque valve rotary actuators and forward and reverse torque testing at different angles, reducing manpower consumption and improving testing efficiency and safety.
Smart Images
Figure CN224317206U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of torque testing technology, specifically relating to a torque testing device for rotary actuators. Background Technology
[0002] With the development of oil and gas extraction and construction, there is a growing demand for upgrading the technology and equipment in the petroleum industry. Fracturing equipment will develop towards higher power, modularity, and portability. Among these advancements, high-torque valves are becoming increasingly widely used, making it imperative to design rotary actuators whose output torque meets the market's requirements for high-torque valves.
[0003] Currently, torque testing of rotary actuators for high-torque valves requires specialized torque testing equipment, but such equipment is scarce. Furthermore, since rotary actuators come in various models, and testing requires angle adjustments to measure output torque at different angles and in both forward and reverse directions, a torque testing system must be compatible with multiple rotary actuator models and capable of testing output torque at different angles. Utility Model Content
[0004] The purpose of this invention is to provide a torque testing device for rotary actuators, used for testing the output torque of rotary actuators in high-torque valves. It is compatible with various models of rotary actuators and can also test the output torque of rotary actuators in different angle states, both forward and reverse.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a torque testing device for a rotary actuator, comprising a test bench, an input spline shaft, a spline sleeve, and a transition spline rotatably mounted on the test bench. The first end of the input spline shaft is used to connect to the power output shaft of the rotary actuator to be tested, and the second end of the input spline shaft is engaged with the transition spline shaft through the spline sleeve. The transition spline shaft is used to connect to one end of a torque sensor, and the other end of the torque sensor is fixed on the test bench.
[0006] The input spline shaft is divided into an upper small-diameter section and a lower large-diameter section, with a stepped surface formed between the small-diameter section and the large-diameter section;
[0007] The upper part of the spline sleeve is provided with symmetrically arranged positioning holes, and positioning pins or positioning pieces are installed in the positioning holes. After the inner end of the positioning pin or positioning piece is supported on the stepped surface to position the spline sleeve vertically, an unlocking space is reserved below the spline sleeve. The height of the unlocking space allows the spline sleeve to completely detach from the input spline shaft after it is released from positioning and falls.
[0008] Specifically, the first end of the input spline shaft is provided with a spline for meshing with the power output shaft of the rotary actuator under test.
[0009] Preferably, the lower end of the transition spline shaft is provided with a connecting flange, and the connecting flange and the torque sensor are fixedly connected by bolts.
[0010] Preferably, a transition plate is fixedly connected to the test bench, the rotary actuator to be tested is fixedly mounted on the transition plate, and the first end of the input spline shaft passes through the opening of the transition plate.
[0011] As a further option, the torque testing device also includes a movable fixture for controlling the lifting of the spline sleeve. The movable fixture is disposed at the lower part of the test bench and includes a rotating support and a rotating component. The rotating component is rotatably mounted on the rotating support, and the portion of the rotating component located on one side of the rotation axis is connected to the spline sleeve, while the portion of the rotating component located on the other side of the rotation axis extends out of the test bench to provide a force application point.
[0012] Specifically, the rotating support is a support rod, and the rotating component includes a lever and a connecting frame. The support rod is fixed to the lower part of the test bench. The lever is rotatably connected to the support rod through a bushing. One end of the lever extending into the test bench is fixedly connected to the lower part of the connecting frame. A pedal is installed on the end of the lever extending out of the test bench. The upper part of the connecting frame is used to connect with the opposite sides of the spline sleeve.
[0013] Alternatively, the rotating support can be a support rod, which includes a lever and a connecting frame. The support rod is rotatably mounted on the lower part of the test bench. The lever and the support rod are fixedly connected in a cross shape. One end of the lever extending into the test bench is fixedly connected to the lower part of the connecting frame. One end of the lever extending out of the test bench is equipped with a pedal or handle. The upper part of the connecting frame is used to connect with the opposite sides of the spline sleeve.
[0014] Specifically, the upper part of the connecting frame is provided with two unconnected connecting rods, which are connected to the spline sleeve.
[0015] Furthermore, columnar bosses are provided on opposite sides of the spline sleeve, and the end of the connecting rod is sleeved on the columnar bosses.
[0016] Alternatively, grooves are provided on opposite sides of the spline sleeve, and the end of the connecting rod is inserted into the groove.
[0017] The beneficial effects of this utility model are: This utility model achieves torque transmission through the meshing between splines, which can conveniently test the forward and reverse output torque of the rotary actuator of a high torque valve.
[0018] The input spline shaft of this invention is easy to replace and can meet the torque testing requirements of different models of rotary actuators, giving the device good compatibility and covering torque testing of multiple models of rotary actuators.
[0019] The spline sleeve of this invention is supported on the stepped surface of the input spline shaft by a locating pin or locating plate, which can maintain the engagement of the spline sleeve with the input spline shaft and the transition spline shaft to realize torque transmission. After the locating pin or locating plate is removed, the spline sleeve can automatically fall off and separate from the input spline shaft due to its own weight. At this time, the input spline shaft can be rotated and drive the power output shaft in the rotary actuator to rotate synchronously. Then, the spline sleeve can be re-engaged with the input spline shaft and the transition spline shaft to test the forward and reverse output torque of the rotary actuator at different angles.
[0020] The movable fixture in this invention can use the lever principle to control the lifting of the spline sleeve, making the lifting process more labor-saving and convenient, and avoiding the time-consuming and labor-intensive manual lifting. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the structure of the present invention in Embodiment 1;
[0023] Figure 2 This is a schematic diagram of the structure of the present invention in Embodiment 2;
[0024] Figure 3 This is a schematic diagram of the lever mechanism in Example 2;
[0025] The markings in the diagram are: 1. Test bench, 2. Torque sensor, 3. Transition spline shaft, 4. Spline sleeve, 401. Columnar boss, 5. Transition plate, 6. Input spline shaft, 7. Stepped surface, 8. Positioning hole, 9. Moving fixture, 901. Lever, 902. Bushing, 903. Support rod, 904. Sleeve, 905. Connecting frame, 906. Pedal. Detailed Implementation
[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention in any way.
[0027] Example 1
[0028] like Figure 1 As shown, a torque testing device for rotary actuators is used to test the forward and reverse output torque of rotary actuators of high-torque valves.
[0029] The torque testing device of this utility model includes a test bench 1, a torque sensor 2, a transition spline shaft 3, a spline sleeve 4, a transition plate 5, and an input spline shaft 6. The transition plate 5 is bolted to the top of the test bench 1 for mounting the rotary actuator to be tested. The input spline shaft 6 is rotatably mounted on the upper part of the test bench 4. The upper end of the input spline shaft 6 is its first end, and the lower end is its second end. Both the upper and lower ends of the input spline shaft 6 are provided with splines, and the spline portion at the upper end of the input spline shaft 6 extends from the opening in the transition plate 5 for meshing with the power output shaft of the rotary actuator to be tested, thereby transmitting torque. The lower end face of the input spline shaft 6 and the upper end face of the transition spline shaft 3 are fitted together, and the lower diameter of the input spline shaft 6 is equal to the upper diameter of the transition spline shaft 3. The upper end of the transition spline shaft 3 is provided with splines, so the spline sleeve 4 can simultaneously engage with both the input spline shaft 6 and the transition spline shaft 3, realizing the transmission of torque from the input spline shaft 6 to the transition spline shaft 3 through the spline sleeve 4. The lower end face of the transition spline shaft 3 is in contact with and fixedly connected to the upper end face of the torque sensor 2, and the lower end of the torque sensor 2 is fixed on the test bench 1.
[0030] Furthermore, the input spline shaft 6 is divided into a small-diameter section and a large-diameter section. The upper end of the small-diameter section is provided with a spline for meshing with the power output shaft of the rotary actuator under test. The large-diameter section meshes with the spline sleeve 4 via a spline. A stepped surface 7 is formed between the small-diameter section and the large-diameter section. The upper end of the spline sleeve 4 is provided with symmetrical positioning holes 8, and positioning pins or positioning pieces are inserted into the positioning holes 8. The inner ends of the positioning pins or positioning pieces rest on the stepped surface 7 to lock the spline sleeve 4, ensuring that the spline sleeve 4 can simultaneously mesh with the input spline shaft 6 and the transition spline shaft 3.
[0031] Furthermore, the transition spline shaft 3 has sufficient length reserved below the spline to allow the spline sleeve 4 to simultaneously engage with both the input spline shaft 6 and the transition spline shaft 3. After being locked by a positioning plate or positioning pin, an unlocking space can be formed below the spline sleeve 4, and the height of the unlocking space allows the spline sleeve 4 to completely disengage from the input spline shaft 6 after falling. In this way, after the spline sleeve 4 is unlocked and falls, it can completely disengage from the input spline shaft 6, allowing the input spline shaft 6 to be rotated.
[0032] Furthermore, a connecting flange is provided at the lower end of the transition spline shaft 3, and the connecting flange and the torque sensor 2 are fixedly connected by bolts.
[0033] During testing, the test bench 1 is fixed to the ground using anchor bolts. The rotary actuator to be tested is fixed to the transition plate 5 with bolts, and the power output shaft of the rotary actuator is meshed with the input spline shaft 6. The hydraulic station supplies oil to drive the rotary actuator to rotate in both directions. The torque at the power output end of the rotary actuator is transmitted to the torque sensor 2 through the input spline shaft 6, spline sleeve 4, and transition spline shaft 3. The output torque of the rotary actuator is read by the torque sensor 2.
[0034] During testing, the spline sleeve 4 is supported on the stepped surface of the input spline shaft 6 by a locating pin or locating plate to prevent it from falling directly and to lock it at a certain angle. When the test angle needs to be adjusted, the locating pin or locating plate is removed to release the lock on the spline sleeve 4, allowing it to fall off the input spline shaft 6. Then, the input spline shaft 6 is rotated to the required angle, which will drive the power output shaft of the rotary actuator under test to rotate synchronously. After adjustment, the spline sleeve 4 is lifted into position by the protrusion 401 on its side and repositioned and locked, so that the spline sleeve 4 re-engages with the input spline shaft 6 and the transition spline shaft 3, allowing the torque test at that angle to be performed.
[0035] This device can also replace the input spline shaft 6 with different models to meet the torque testing requirements of different rotary actuators. Different models of input spline shaft 6 have the same spline at the lower end, so after replacing the input spline shaft 6, the original spline sleeve 4 can still be used, reducing the number of compatible parts.
[0036] Example 2
[0037] like Figure 2 As shown, the difference between this embodiment and Embodiment 1 is that this embodiment also includes a movable fixture 9 for controlling the lifting of the spline sleeve 4. Since the spline sleeve 4 is quite heavy, lifting it manually is time-consuming, labor-intensive, and poses certain safety hazards. Therefore, this embodiment proposes a movable fixture 9 that utilizes the lever principle to achieve the lifting of the spline sleeve 4 with less effort.
[0038] The structure of the movable tooling 9 is as follows: Figure 3As shown, the test bench 1 includes a support rod 903 as a rotating support, a lever 901 as a rotating component, and a connecting frame 905 connected to it. The support rod 903 is fixedly installed at the bottom of the test bench 1, serving as the fulcrum of the lever 901. The middle part of the lever 901 is rotatably supported on the support rod 903. This rotatable support can be achieved through a bushing 902. The surface of the bushing 902 is fixedly connected to the lower part of the lever 901, such as by screws or welding. The bushing 902 is fitted onto the support rod 903 and can rotate on the support rod 903. One end of the lever 901 is connected to the connecting frame 905, and the other end is provided with a pedal 906. The connecting frame 905 is generally C-shaped. Its closed side is fixedly connected to the lever 901 by bolts or welding, and its open side is provided with two connecting rods 904, which are not connected to each other.
[0039] When the movable fixture 9 is connected to the spline sleeve 4, the support rod 903, which serves as a fulcrum in the movable fixture 9, is located below the test bench 1. One end of the lever 901, on which a pedal 906 is mounted, extends from below the test bench 1, so that the operator can step on the pedal 906 to control the up-and-down movement of the connecting frame 905. The two connecting rods 904 of the connecting frame 905 are connected to the two columnar bosses 401 on both sides of the spline sleeve 4. For example, a groove can be provided at the end of the connecting rod 904, and the rod can be fitted onto the columnar bosses 401 through the groove. Alternatively, the connecting rod 904 can be made into a hollow rod and fitted onto the columnar bosses 401.
[0040] The spline sleeve 4 can fall by its own weight during the falling process, so there is no need to control the moving fixture 9. Of course, when the distance below the spline sleeve 4 is large, in order to avoid impacting the spline sleeve 4 and reduce noise, the pedal 906 can be stepped on during the falling process of the spline sleeve 4 to control the spline sleeve 4 to fall slowly.
[0041] When it is necessary to raise the spline sleeve 4, step on the pedal 906, the connecting frame 905 will rise, pushing the connected spline sleeve 4 to rise and engage with the input spline shaft 6. After it is raised to the position, insert a positioning pin or positioning piece into the positioning hole 8 of the spline sleeve 4. The inner end of the positioning pin or positioning piece rests on the stepped surface 7 to lock the spline sleeve 4.
[0042] In embodiment 2, the support rod 903 is fixedly installed, and the lever 901 is rotatably connected to the support rod 903, forming a lever structure. According to the lever principle, in other embodiments, the support rod 903 can also be rotatably installed at the bottom of the test bench 1, and the lever 901 can be fixed to the support rod 903 and arranged in a cross pattern. This also allows the connecting frame 905 to be controlled to lift the spline sleeve 4 by applying force at the outer end of the lever 901.
[0043] In embodiment 2, the pedal 906 is used as the force application point of the lever 901. In other embodiments, if the test stand 1 is positioned too high to easily apply force by stepping on the pedal 906, a handle can be used instead of the pedal 906 as the force application point. In this case, the operator can hold the handle and press down on the lever 901 to lift the spline sleeve 4.
[0044] In embodiment 2, columnar bosses 401 are provided on opposite sides of the spline sleeve 4 for connection with the connecting frame 905. In other embodiments, grooves may also be provided on opposite sides of the spline sleeve 4, and the connecting rod 904 of the connecting frame 905 may be inserted into the grooves.
[0045] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the specific implementation of this utility model with reference to the above embodiments. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model are within the protection scope of the pending claims.
Claims
1. A torque testing device for a rotary actuator, characterized in that: The test bench includes an input spline shaft, a spline sleeve, and a transition spline, all rotatably mounted on the test bench. The first end of the input spline shaft is used to connect to the power output shaft of the rotary actuator under test. The second end of the input spline shaft is engaged with the transition spline shaft through the spline sleeve. The transition spline shaft is used to connect to one end of a torque sensor, and the other end of the torque sensor is fixed on the test bench. The input spline shaft is divided into an upper small-diameter section and a lower large-diameter section, with a stepped surface formed between the small-diameter section and the large-diameter section; The upper part of the spline sleeve is provided with symmetrically arranged positioning holes, and positioning pins or positioning pieces are installed in the positioning holes. After the inner end of the positioning pin or positioning piece is supported on the stepped surface to position the spline sleeve vertically, an unlocking space is reserved below the spline sleeve. The height of the unlocking space allows the spline sleeve to completely detach from the input spline shaft after it is released from positioning and falls.
2. The torque testing device according to claim 1, characterized in that: The first end of the input spline shaft is provided with a spline for meshing with the power output shaft of the rotary actuator under test.
3. The torque testing device according to claim 1, characterized in that: The lower end of the transition spline shaft is provided with a connecting flange, and the connecting flange and the torque sensor are fixedly connected by bolts.
4. The torque testing device according to claim 1, characterized in that: A transition plate is fixedly connected to the test bench, and the rotary actuator to be tested is fixedly installed on the transition plate. The first end of the input spline shaft passes through the opening of the transition plate.
5. The torque testing device according to any one of claims 1 to 4, characterized in that: It also includes a movable fixture for controlling the lifting of the spline sleeve. The movable fixture is located at the lower part of the test bench. The movable fixture includes a rotating support and a rotating component. The rotating component is rotatably mounted on the rotating support. The portion of the rotating component located on one side of the rotation axis is connected to the spline sleeve, and the portion of the rotating component located on the other side of the rotation axis extends out of the test bench to provide a force application point.
6. The torque testing device according to claim 5, characterized in that: The rotating support is a support rod, which includes a lever and a connecting frame. The support rod is fixed to the lower part of the test bench. The lever is rotatably connected to the support rod through a bushing. One end of the lever extending into the test bench is fixedly connected to the lower part of the connecting frame. One end of the lever extending out of the test bench is equipped with a pedal or handle. The upper part of the connecting frame is used to connect with the opposite sides of the spline sleeve.
7. The torque testing device according to claim 5, characterized in that: The rotating support is a support rod, which includes a lever and a connecting frame. The support rod is rotatably mounted on the lower part of the test bench. The lever and the support rod are fixedly connected in a cross shape. One end of the lever extending into the test bench is fixedly connected to the lower part of the connecting frame. One end of the lever extending out of the test bench is equipped with a pedal or handle. The upper part of the connecting frame is used to connect with the opposite sides of the spline sleeve.
8. The torque testing device according to claim 6 or 7, characterized in that: The upper part of the connecting frame is provided with two unconnected connecting rods, which are connected to the spline sleeve.
9. The torque testing device according to claim 8, characterized in that: The spline sleeve has columnar bosses on opposite sides, and the end of the connecting rod is sleeved on the columnar bosses.
10. The torque testing device according to claim 8, characterized in that: The spline sleeve has grooves on its opposite sides, and the end of the connecting rod is inserted into the groove.