A power unit torque load measuring device

Abstract

This utility model relates to the field of load testing technology, and in particular discloses a power unit torque load measuring device. The measuring device includes a load cylinder and a liquid tank connected to the load cylinder. The load cylinder includes a cylinder body and a spiral shaft rotatably disposed within the cylinder body. The liquid tank is connected to the cylinder body via a through hole. The rotating spiral shaft drives the liquid in the cylinder body to flow into the liquid tank through a first one-way valve and a regulating valve. The liquid in the liquid tank flows into the cylinder body through a second through hole. A sensor is used to measure the rotational speed or torque of the spiral shaft. The control unit adjusts the opening of the regulating valve according to the sensor's measurement data. When testing the power unit, the power unit drives the spiral shaft to rotate. The sensor detects the rotational speed or torque of the spiral shaft. The control unit adjusts the opening of the regulating valve to keep the rotational speed or torque of the spiral shaft constant, thereby realizing automatic testing of the power unit's service life and improving testing accuracy.

Description

Technical Field

[0001] This utility model relates to the field of load testing technology, and in particular discloses a power unit torque load measuring device. Background Technology

[0002] Various mechanical equipment requires power units; for example, torque output power units are commonly used. After the torque output power unit is manufactured, its performance and lifespan need to be tested, especially under load. Accurate testing of its performance and lifespan is crucial. Existing load testing structures for torque output power units are complex, inaccurate, and inconvenient to use. Utility Model Content

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a power unit torque load measuring device. The sensor detects the rotational speed or torque of the screw shaft, and the control unit adjusts the opening of the regulating valve to keep the rotational speed or torque of the screw shaft constant, thereby realizing automatic testing of the service life of the power unit and improving the testing accuracy.

[0004] To achieve the above objectives, this utility model provides a power unit torque load measuring device, comprising a load cylinder and a liquid tank connected to the load cylinder; the load cylinder includes a cylinder body for containing liquid and a spiral shaft rotatably disposed within the cylinder body, the power unit to be tested being used to drive the spiral shaft to rotate; it also includes a sensor, a first one-way valve, a regulating valve, and a control unit; the cylinder body has a first through hole and a second through hole, the liquid tank being connected to the cylinder body via the through hole, the rotating spiral shaft driving the liquid in the cylinder body to flow into the liquid tank through the first one-way valve and the regulating valve, and the liquid in the liquid tank flowing into the cylinder body through the second through hole; the sensor, regulating valve, and power unit are electrically connected to the control unit respectively; the sensor is used to measure the rotational speed or torque of the spiral shaft, and the control unit adjusts the opening of the regulating valve according to the measurement data of the sensor.

[0005] The liquid tank is located above the cylinder body. The spiral shaft includes a shaft body rotatably disposed inside the cylinder body and spiral blades disposed on the shaft body. The spiral blades are spirally wound around the outside of the shaft body and extend along the length direction of the shaft body. The shaft body protrudes out of the cylinder body and is connected to the power unit via a coupling.

[0006] The rotation axis of the helical shaft is parallel to the horizontal plane, and the first through hole and the second through hole are located at both ends of the top wall of the cylinder.

[0007] It also includes a second check valve, through which the liquid in the liquid tank enters the cylinder body via the second check valve and the second through hole.

[0008] It also includes two liquid return pipes, two first check valves, and the lower ends of the two liquid return pipes are respectively connected to the first through hole and the second through hole of the cylinder. Both liquid return pipes are connected to the upper end of the liquid tank via regulating valves. The two first check valves are respectively installed on the two liquid return pipes.

[0009] It also includes two pressure gauges electrically connected to the control unit. The two pressure gauges are respectively installed in the liquid return pipe and are used to measure the pressure of the liquid flowing through the liquid return pipe.

[0010] It also includes a liquid passage pipe, and there are two second one-way valves. The liquid tank is connected to the first through hole and the second through hole of the cylinder body through the liquid passage pipe. The upper end of the liquid passage pipe is connected to the bottom wall of the liquid tank, and the two second one-way valves are respectively set at the lower end of the liquid passage pipe.

[0011] The liquid tank is equipped with a cooling unit, which is electrically connected to the control unit. The cooling unit is used to reduce the temperature of the liquid in the liquid tank.

[0012] The spiral shaft has two ends that protrude from the cylinder body at opposite ends. One end of the spiral shaft protruding from the cylinder body is connected to the power unit, and the sensor is located at the other end of the spiral shaft protruding from the cylinder body.

[0013] Beneficial effects: When the power unit needs to be tested, the power unit starts up and drives the screw shaft to rotate. The sensor detects the speed or torque of the screw shaft. The control unit automatically adjusts the opening of the regulating valve according to the actual measurement data of the sensor, so that the speed or torque of the screw shaft remains constant, thereby realizing the automatic testing of the service life of the power unit and improving the test accuracy. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] The reference numerals in the figures include:

[0016] 1—Load cylinder; 2—Liquid tank; 3—Cylinder body

[0017] 4—Screw shaft; 5—Sensor; 6—First check valve

[0018] 7—Regulating valve; 8—Control unit; 9—Helical blade

[0019] 11—Second check valve; 12—Liquid return pipe; 13—Liquid transfer pipe

[0020] 14—Pressure gauge 15—Cooling unit 16—Exhaust pipe

[0021] 17—Fixed base 111—Power unit. Detailed Implementation

[0022] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0023] Reference Figure 1 The present invention relates to a power unit torque load measuring device, comprising a load cylinder 1 and a liquid tank 2 connected to the load cylinder 1; the liquid tank 2 is used to hold external liquid, and the liquid can be hydraulic oil according to actual needs, that is, hydraulic oil is used as a damping fluid. Of course, at this time the load cylinder 1 is an oil cylinder.

[0024] The load cylinder 1 includes a cylinder body 3 for containing liquid and a spiral shaft 4 rotatably disposed within the cylinder body 3. The axis of rotation of the spiral shaft 4 is parallel to the horizontal plane. The power unit 111 to be tested is used to drive the spiral shaft 4 to rotate. The power unit 111 can be a motor, etc. Of course, the power unit 111 can also be a combination of a motor and a reducer.

[0025] It also includes a sensor 5, a first one-way valve 6, a regulating valve 7 and a control unit 8. The cylinder body 3 is provided with a first through hole and a second through hole. The liquid tank 2 is connected to the cylinder body 3 through the through hole. In this embodiment, different parts of the liquid tank 2 are respectively connected to the first through hole and the second through hole of the cylinder body 3.

[0026] When the power unit 111 drives the screw shaft 4 to rotate, the rotating screw shaft 4 drives the liquid in the cylinder 3 to flow into the liquid tank 2 through the first one-way valve 6 and the regulating valve 7. The first one-way valve 6 prevents the liquid in the liquid tank 2 from flowing into the cylinder 3 through the regulating valve 7. The liquid in the liquid tank 2 flows into the cylinder 3 through the second through hole. Preferably, the liquid in the liquid tank 2 flows into the cylinder 3 through the second through hole under its own gravity. The liquid in the liquid tank 2 can automatically flow into the cylinder 3 without being subjected to the force of an additional power pump, avoiding errors in the test results caused by the liquid being subjected to the force of a power pump.

[0027] Sensor 5, regulating valve 7, and power unit 111 are electrically connected to control unit 8 respectively. Sensor 5 is used to measure the rotational speed or torque of screw shaft 4. That is, sensor 5 can be a speed sensor 5 or a torque sensor 5. The speed sensor 5 is used to measure the rotational speed of screw shaft 4, and the torque sensor 5 is used to measure the torque of screw shaft 4. Control unit 8 adjusts the opening of regulating valve 7 according to the measurement data of sensor 5.

[0028] Preferably, the control unit 8 is equipped with a display screen that displays the parameter values ​​of the sensor 5, the regulating valve 7, and the power unit 111. Users can directly view the parameter values ​​through the display screen, which improves the convenience of viewing the test process.

[0029] When the power unit 111 needs to be tested, the power unit 111 starts and drives the spiral shaft 4 to rotate. The sensor 5 detects the speed or torque of the spiral shaft 4. The control unit 8 automatically adjusts the opening of the regulating valve 7 according to the actual measurement data of the sensor 5, so that the speed or torque of the spiral shaft 4 remains constant, thereby realizing the automatic testing of the service life of the power unit 111 and improving the test accuracy.

[0030] In this embodiment, the liquid tank 2 is located above the cylinder 3. The spiral shaft 4 includes a shaft rotatably disposed inside the cylinder 3 and spiral blades 9 disposed on the outside of the shaft. The spiral blades 9 are spirally wound around the outside of the shaft and extend along the length of the shaft. The shaft protrudes outside the cylinder 3 and is connected to the power unit 111 via a coupling. In use, the power unit 111 is connected to the shaft, and the power unit 111 drives the shaft and spiral blades 9 to rotate. The rotating spiral blades 9 drive the liquid in the cylinder 3 to fall into the solution tank through the first one-way valve 6 and the regulating valve 7. At the same time, the liquid in the liquid tank 2 automatically flows into the cylinder 3 under the action of gravity to replenish the liquid.

[0031] The first and second through holes are located on the left and right ends of the top wall of the cylinder body 3, respectively. Compared with the through holes being located on the bottom wall of the cylinder body 3, this facilitates the flow of liquid from the liquid tank 2 into the cylinder body 3 and reduces the risk of liquid leakage from the cylinder body 3 through the through holes.

[0032] It also includes a second check valve 11, through which liquid in the liquid tank 2 enters the cylinder 3 under the influence of gravity via the second check valve 11 and the second through hole. The second check valve 11 prevents liquid in the cylinder 3 from flowing into the liquid tank 2 through the second through hole.

[0033] It also includes a liquid passage pipe 13, and two second one-way valves 11. The liquid tank 2 is connected to the first through hole and the second through hole of the cylinder 3 through the liquid passage pipe 13. The upper end of the liquid passage pipe 13 is connected to the bottom wall of the liquid tank 2. The two second one-way valves 11 are respectively installed on the lower end of the liquid passage pipe 13, and the lower end of the liquid passage pipe 13 is connected to the top wall of the cylinder 3.

[0034] It also includes two liquid return pipes 12, and two first check valves 6. The lower ends of the two liquid return pipes 12 are respectively connected to the first through hole and the second through hole of the cylinder body 3. Both liquid return pipes 12 are connected to the upper end of the liquid tank 2 via regulating valves 7. Preferably, the liquid return pipes 12 are connected to the top wall of the liquid tank 2. The first check valves 6 and regulating valves 7 are both installed on the liquid return pipes 12. The two first check valves 6 are respectively installed on the two liquid return pipes 12. In this embodiment, the two liquid return pipes 12 share a common pipe, and there is one regulating valve 7 installed on the common pipe.

[0035] With the configuration of two liquid return pipes 12, two first one-way valves 6, and two second one-way valves 11, when the screw shaft 4 rotates clockwise, the liquid in the cylinder 3 is driven to flow out through the first through hole and into the liquid tank 2 through the first one-way valve 6 and the regulating valve 7. At this time, the liquid in the liquid tank 2 flows through the second one-way valve 11 and into the cylinder 3 through the second through hole. When the screw shaft 4 rotates counterclockwise, the liquid in the cylinder 3 is driven to flow out through the second through hole and into the liquid tank 2 through the first one-way valve 6 and the regulating valve 7. At this time, the liquid in the liquid tank 2 flows through the second one-way valve 11 and into the cylinder 3 through the first through hole.

[0036] It also includes two pressure gauges 14 electrically connected to the control unit 8. The two pressure gauges 14 are respectively installed on the liquid return pipe 12. The pressure gauges 14 are used to measure the pressure value of the liquid flowing through the liquid return pipe 12, so as to monitor the liquid pressure in the liquid return pipe 12.

[0037] The liquid tank 2 is equipped with a cooling unit 15, which is electrically connected to the control unit 8. The cooling unit 15 is used to reduce the temperature of the liquid in the liquid tank 2. By using the cooling unit 15 to cool the liquid in the liquid tank 2, the accuracy of the test is avoided due to thermal expansion and contraction caused by temperature changes in the liquid. Depending on the actual needs, the cooling unit 15 can be a cooling pipe installed inside the liquid tank 2. Coolant from the outside, which is cooler than the liquid in the liquid tank 2, flows through the cooling pipe to cool the liquid in the liquid tank 2. Alternatively, the cooling unit 15 can be a refrigerator, etc. In this case, the control unit 8 regulates the cooling unit 15 to lower the temperature, using the cooling zone unit to carry away the heat from the liquid in the liquid tank 2, thereby cooling the liquid in the liquid tank 2.

[0038] The liquid tank 2 is equipped with a temperature sensor 5 electrically connected to the control unit 8. The temperature sensor 5 is located on the outside of the liquid tank 2 and is used to measure the temperature of the liquid inside the liquid tank 2. The display screen shows the temperature value measured by the temperature sensor 5. By viewing the content displayed on the screen, the user can directly know the actual temperature of the liquid inside the liquid tank 2, making it easy to observe the actual temperature of the liquid flowing through the cylinder 3 and the liquid tank 2.

[0039] Preferably, the liquid tank 2 is equipped with a liquid level sensor electrically connected to the control unit 8. The liquid level sensor is used to measure the liquid level value in the liquid tank 2. When the liquid level value in the liquid tank 2 is lower than the preset liquid level value, the control unit 8 regulates the external liquid supply device to input liquid into the liquid tank 2, so that the liquid level in the liquid tank 2 rises to the required liquid level height.

[0040] The two ends of the helical shaft 4 protrude from the two far apart ends of the cylinder body 3. One end of the helical shaft 4 protruding from the cylinder body 3 is connected to the power unit 111, and the sensor 5 is installed on the other end of the helical shaft 4 protruding from the cylinder body 3. The sensor 5 and the coupling are located on the left and right sides of the cylinder body 3, respectively.

[0041] The top of the liquid tank 2 is equipped with an exhaust pipe 16, through which the mist inside the liquid tank 2 is discharged. By adding the exhaust pipe 16, it is possible to facilitate the free exchange of gas inside the liquid tank 2 with the outside air, and to avoid the gas pressure inside the liquid tank 2 from rising or falling, which would interfere with the accuracy of the test.

[0042] The hydraulic load testing device also includes a fixed base 17. The load cylinder 1, liquid tank 2, and power unit 111 are all fixedly mounted on the same fixed base 17. The load cylinder 1, liquid tank 2, and power unit 111 share a common fixed reference. Compared to installing the load cylinder 1, liquid tank 2, and power unit 111 on different fixed references, this ensures that the load cylinder 1, liquid tank 2, and power unit 111 are relatively stationary, further helping to improve the test yield. The power unit 111 is detachably connected to the fixed base 17. According to actual needs, users can replace different power units 111, thereby realizing automatic testing of different power units 111.

[0043] The above content is only a preferred embodiment of this utility model, and the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A power unit torque load measuring device, comprising a load cylinder and a liquid tank communicating with the load cylinder; the load cylinder includes a cylinder body for containing liquid and a spiral shaft rotatably disposed within the cylinder body, wherein the power unit to be tested is used to drive the spiral shaft to rotate; characterized in that: It also includes a sensor, a first check valve, a regulating valve, and a control unit. The cylinder body is provided with a first through hole and a second through hole. The liquid tank is connected to the cylinder body through the through hole. The rotating screw shaft drives the liquid in the cylinder body to flow into the liquid tank through the first check valve and the regulating valve. The liquid in the liquid tank flows into the cylinder body through the second through hole. The sensor, regulating valve, and power unit are electrically connected to the control unit. The sensor is used to measure the rotational speed or torque of the screw shaft. The control unit adjusts the opening of the regulating valve according to the measurement data of the sensor.

2. The power unit torque load measuring device according to claim 1, characterized in that: The liquid tank is located above the cylinder body. The spiral shaft includes a shaft body rotatably disposed inside the cylinder body and spiral blades disposed on the shaft body. The spiral blades are spirally wound around the outside of the shaft body and extend along the length direction of the shaft body. The shaft body protrudes out of the cylinder body and is connected to the power unit via a coupling.

3. The power unit torque load measuring device according to claim 1, characterized in that: The axis of rotation of the screw shaft is parallel to the horizontal plane, and the first through hole and the second through hole are located at both ends of the top wall of the cylinder.

4. The power unit torque load measuring device according to claim 1, characterized in that: It also includes a second check valve, through which the liquid in the tank enters the cylinder body via the second check valve and the second through-hole.

5. The power unit torque load measuring device according to claim 1, characterized in that: It also includes two liquid return pipes, two first check valves, and the lower ends of the two liquid return pipes are respectively connected to the first through hole and the second through hole of the cylinder. Both liquid return pipes are connected to the upper end of the liquid tank via regulating valves, and the two first check valves are respectively installed on the two liquid return pipes.

6. The power unit torque load measuring device according to claim 5, characterized in that: It also includes two pressure gauges electrically connected to the control unit. The two pressure gauges are respectively installed in the liquid return pipe and are used to measure the pressure of the liquid flowing through the liquid return pipe.

7. The power unit torque load measuring device according to claim 4, characterized in that: It also includes a liquid passage pipe, and there are two second one-way valves. The liquid tank is connected to the first through hole and the second through hole of the cylinder body through the liquid passage pipe. The upper end of the liquid passage pipe is connected to the bottom wall of the liquid tank, and the two second one-way valves are respectively set at the lower end of the liquid passage pipe.

8. The power unit torque load measuring device according to claim 1, characterized in that: The liquid tank is equipped with a cooling unit, which is electrically connected to the control unit. The cooling unit is used to reduce the temperature of the liquid in the liquid tank.

9. The power unit torque load measuring device according to claim 1, characterized in that: The two ends of the spiral shaft protrude from the cylinder body at opposite ends. One end of the spiral shaft protruding from the cylinder body is connected to the power unit, and the sensor is located at the other end of the spiral shaft protruding from the cylinder body.

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