KR20090127664A - Apparatus for load testing of actuator - Google Patents

Abstract

PURPOSE: A translation cam power actuator load testing apparatus is provided to connect a hydraulic cylinder to a reservoir directly and control the flow rate and pressure of the fluid using a servo valve. CONSTITUTION: A translation cam power actuator load testing apparatus comprises a test stand, a load cell(120), an actuator support stand(132) and a load generation unit(200). The test stand supports a plurality of parts. The load cell is included in one side of the test stand. The load cell measures the load. The actuator support stand is formed in one side of the test stand. The actuator support stand supports an actuator(130).

Description

Linear force actuator load testing device {Apparatus for load testing of actuator}

The present invention relates to a test apparatus, and more particularly, a load performance test of a hydraulic actuator can be efficiently performed by a load generating means having a simple structure including a hydraulic cylinder, an oil reservoir, and a flow rate / pressure regulator (servo valve). It relates to a power actuator load tester.

In general, a transducer for converting movable energy (electrical energy) into mechanical displacement or stress is called an actuator, and the present invention relates to a test apparatus for testing the load performance of such a hydraulic actuator.

In a conventional load performance testing apparatus of a conventional hydraulic actuator, a load generator is used to generate a load. In addition, a separate power pack is required to operate the bushing cylinder provided in the load generator.

That is, a separate independent power pack is required to operate the bushing cylinder (hydraulic cylinder) to the test specification required for the test, and a separate hydraulic device must be provided to drive the power pack.

The hydraulic device includes a hydraulic pump, an electric motor, an oil reservoir, a plurality of control valves, and an associated hydraulic device.

Therefore, the load performance test apparatus of the conventional hydraulic actuator is required to increase the size of the test apparatus due to the power pack, etc., and high cost is required. That is, since a power pack is required, there is a problem in that a hydraulic pump and an electric motor for driving the pump, a reservoir for storing fluid, a valve and a pressure / flow control hydraulic device, and a hydraulic oil supply pipe are required.

As described above, the conventional hydraulic actuator adverb performance test apparatus has a problem in that manufacturing cost is increased, maintenance is difficult, and hydraulic oil leaks due to a large number of long pipes, and noise of the pump is severe and large hydraulic pressure is increased. There is an excess of weight and volume due to the system.

An object of the present invention is to solve the problems of the prior art as described above, instead of using a separate power pack, connecting the bushing cylinder (hydraulic cylinder) directly to the oil reservoir and the oil flow and hydraulic pressure adjustment by the servo valve It is to provide a linear force actuator load test apparatus to achieve this.

According to an aspect of the present invention, there is provided a linear force actuator load test apparatus including: a test stand for supporting a plurality of components; A load cell provided at one side of the test stand and measuring a load; An actuator support unit which is integrally formed on one side of the test stand and supports an actuator which becomes a test sample; It is provided on one side of the test stand, and has a configuration including a load generating means for generating a load; The load generating means is characterized in that the hydraulic cylinder is provided with a two-way piston rod, a reservoir for storing the fluid, and a control valve for adjusting the flow rate and pressure of the fluid supplied to the hydraulic cylinder.

According to the linear power actuator load test apparatus of the present invention as described above, unlike a general hydraulic load test apparatus, the load performance test is independently possible without an external hydraulic power pack. That is, if the hydraulic cylinder for the load is manually operated in conjunction with the operation of the test sample, the hydraulic oil of the cylinder is sucked into and discharged into the reservoir, and the pressure and flow rate of the suction and discharge flow paths are used.

As described above, in the present invention, the bushing cylinder is directly connected to the oil reservoir and the flow rate and the hydraulic pressure are adjusted using a servo valve. Therefore, there is an advantage that the load measurement of the test sample can be efficiently performed. As such, the performance test of the test sample is not only convenient, but also has side effects such as cost reduction, energy saving, and noise reduction.

In addition, in the linear force actuator load test apparatus according to the present invention, a sensor for checking an operating position and a speed of a test sample is installed to be interlocked with a test sample, and a displacement sensor installed in the test device detects an operating position of the test sample. Designed to allow position control, the flow and hydraulic controls are controlled by the servovalve and electrically remotely controlled. As such, it is possible to adjust and monitor the load device by an electric signal, and to secure driver adjustability by using a position sensor or the like installed in the test device, thereby making it possible to obtain more compact and more accurate measurement data.

In addition, in the present invention, since a linearly actuated high-response actuator that can be operated independently is used, the hydraulic load can be generated even in a non-powered state according to the operation of the actuator, and the hydraulic oil can be efficiently supplied without cavitation in the pipeline when the hydraulic oil is supplied and returned. Load testing is possible. As described above, the present invention has the advantage that the load test under various conditions of the optimum high-response high-efficiency hydraulic actuator can be performed.

Hereinafter, the configuration of the linear power actuator load test apparatus according to the present invention will be described with reference to the accompanying drawings.

1 is a front view showing the configuration of a preferred embodiment of the linear power actuator load test apparatus according to the present invention, Figure 2 is a left side view of FIG. 3 is a circuit configuration diagram of the linear power actuator load test apparatus according to the present invention.

As shown in these figures, the linear force actuator load test apparatus according to the present invention includes a test stand 100 for supporting a plurality of parts, a load cell 120 for measuring a load, and an actuator 130 serving as a test sample. Actuator support 132 for supporting the) and load generating means 200 for generating a load or the like.

The test stand 100 is formed in a table shape for supporting a plurality of components as shown, the upper side of the test stand 100 is provided with a guide rail 102 long to the left and right (in Figure 1).

In addition, the guide rail 102 is mounted with a sliding plate 104 so as to be slid left and right. That is, the sliding plate 104 is mounted on the guide rail 102 to slide along the longitudinal direction of the test stand 100.

The load cell support 106 is fixedly installed on the upper side of the sliding plate 104. The load cell support 106 is for supporting the load cell 120. Thus, as shown, the load cell 120 is fixed to the left side (in Figure 1) of the load cell support 106. In addition, the load cell 120 is further provided with a load meter 122.

The actuator support 132 is integrally formed at the upper right end of the test stand 100. The actuator support 132 serves to support the actuator 130 to be a test sample. Thus, as shown, the actuator 130 is mounted between the actuator support 132 and the load cell support 106.

The actuator 130 is a linear power high response actuator is used. In other words, the pump and the motor is built in itself so that it can be operated by itself, and the actuator is capable of speeding up or slowing down the operating speed of the actuator by controlling the rotation speed of the motor.

One side of the actuator 130, the displacement sensor 132 for measuring the moving distance of the rod constituting the actuator 130 is further provided. The displacement sensor 132 detects the operating position of the actuator 130 which is a test sample to enable accurate position control. The displacement sensor 132 may further include a displacement meter 134 and a speedometer 136.

The load generating means 200 is provided on the left side (in FIG. 1) of the test stand 100, and the load generating means 200 includes a hydraulic cylinder 210 having a bidirectional piston rod and a fluid. A plurality of components, such as a storage oil reservoir 220 to store, and a control valve 230 for adjusting the flow rate and pressure of the fluid supplied to the hydraulic cylinder 210.

Looking in more detail, the cylinder support 212 is formed to protrude upward from the upper left side of the test stand 100, the hydraulic cylinder 210 is installed long in the test stand 100 to the left and right (Fig. 1). do. The hydraulic cylinder 210 is composed of a bidirectional piston rod to balance control in the expansion and contraction direction in the cylinder.

The hydraulic cylinder 210 is passively moved in the present invention. That is, when the actuator 130 is actively operated by its own power, the hydraulic cylinder 210 is passively moved by the force of the actuator 130.

As shown, the rod 214 protrudes to the right side (in FIG. 1) of the hydraulic cylinder 210, and the rod 214 and the load cell 120 are connected by a link 215. . In detail, a partition plate 211 is formed in the hydraulic cylinder 210 to partition the left and right spaces, and the left side space 211a and the right side space 211b on the left side are centered on the partition plate 211. (See Figure 3).

In addition, the hydraulic cylinder 210 is connected to the reservoir pipes 216 and 216 'that communicate with the reservoir 220, and the valve pipe 218 connected to the control valve 230 is installed.

Looking in more detail, as shown in FIG. 3, the reservoir pipes 216 and 216 'are formed in pairs, and are formed of a left reservoir pipe 216 and a right reservoir pipe 216', and the valve pipe 218 again. It is branched into the left channel 218a and the right channel 218b. Accordingly, the left oil reservoir 216 and the left oil passage 218a are connected to the left space 211 a inside the hydraulic cylinder 210, and the right oil reservoir 216 ′ and the right oil passage 218 b are connected to the oil pressure. It is connected to the right space 211b of the cylinder 210.

The reservoirs 216 and 216 ', the left flow passage 218a and the right flow passage 218b are each equipped with a check valve C for controlling the one-way flow of the fluid, and the valve pipe 218 has foreign substances. A filter P for filtering the filter is further provided.

An upper side of the hydraulic cylinder 210 is provided with a control valve 230 is connected to the valve pipe 218, this control valve 230 to adjust the flow rate and the pressure of the fluid in accordance with the strength of the current, It consists of a servo valve. Since the servovalve is generally used a lot, detailed description of the function is omitted here.

In addition, the control valve 230 is integrally formed with a regulator (230a), one side is further provided with a pressure sensor 232 and a pressure gauge 234 for measuring the pressure of the fluid.

The oil reservoir 220 is installed inside the test stand 100. Accordingly, the reservoir 220 and the hydraulic cylinder 210 are connected by the reservoirs 216 and 216 ', and the reservoir 220 is provided with an air supply pipe 222 through which air for forming hydraulic pressure is supplied. More connected.

On the other hand, between the control valve 230 and the reservoir 220 is provided with a discharge passage 240 and an exhaust passage 242 for guiding the movement of the fluid. Accordingly, the fluid is moved through the discharge passage 240 by the control valve 230 controlled by electricity, and the fluid is supplied to the oil reservoir 220 and the hydraulic cylinder 210. In addition, the fluid drained during operation of the control valve 230 is introduced into the reservoir 220 through the drainage passage 242.

The discharge passage 240 and the drain passage 242 are further provided with a separate control valve 244 for controlling the opening and closing of the passage to control the flow of the fluid. Reference numeral 246 is a connection hose.

Hereinafter, the operation of the linear power actuator load test apparatus will be described.

First, in order to install the actuator 130 which is a test sample in the linear power actuator load test apparatus of the present invention as described above, the sliding plate 104 is moved to the left side (in FIG. 1). That is, when the load cell support 106 fixed to the sliding plate 104 is pulled to the left side, the sliding plate 104 slides along the guide rail 102 to move to the left side.

Then, the actuator 130 is inserted between the load cell support 106 and the actuator support 132. First, the right end of the actuator 130 is fixed to the actuator 130, and then the left end of the actuator 130 is hooked by pulling the load cell support 106 to the right.

After the actuator 130, which is a test sample, is mounted by the above process, measurement is started, and the fluid discharged from the hydraulic cylinder 210 is supplied through the control valve 230 to form a constant load.

The operating state and fluid flow at this time will be described in more detail with reference to FIG. 3.

As described above, the actuator 130, which is a test sample, is a linearly acting high-response actuator that can be operated by itself, so that the left and right flows occur according to the operation of the actuator 130, and the flow can be adjusted quickly or slowly. Done. In addition, the operation of the actuator 130 is measured and displayed by the displacement sensor 132, the displacement meter 134, and the speedometer 136.

For example, when the rod of the actuator 130 moves to the right (in FIG. 3) according to the operation of the actuator 130 (see solid arrow), the hydraulic cylinder 210 connected by the link 215 is provided. This force is transmitted to the rod, the rod 214 and the partition plate 211 of the hydraulic cylinder 210 is moved to the right.

Therefore, the fluid in the right space 211b located on the right side of the partition plate 211 is discharged from the hydraulic cylinder 210 through the right flow passage 218b. The fluid guided through the right flow passage 218b passes through the control valve 230 through the valve pipe 218, and the control valve 230 controls the amount and pressure of the fluid passing therethrough.

The fluid passing through the control valve 230 is introduced into the reservoir 220 through the discharge passage 240, and the fluid introduced into the reservoir 220 is hydraulically supplied through the left reservoir pipe 216. It flows into the left space 211a inside the cylinder 210.

On the contrary, when the rod of the actuator 130 moves to the left side (see FIG. 3), such a force is transmitted to the hydraulic cylinder 210 connected by the link 215, and the hydraulic cylinder 210 is moved. The rod 214 and the partition plate 211 are moved to the left side.

Therefore, the fluid in the left space 211a located on the left side of the partition plate 211 is discharged from the hydraulic cylinder 210 through the left flow passage 218a. The fluid guided through the left channel 218a passes through the control valve 230 through the valve pipe 218, and the control valve 230 controls the amount and pressure of the fluid passing therethrough.

The fluid passing through the control valve 230 is introduced into the reservoir 220 through the discharge passage 240, and the fluid introduced into the reservoir 220 passes through the right reservoir pipe 216 '. Through the hydraulic cylinder 210 is introduced into the right space 211b.

By this process, the circulation of the fluid is achieved.

As the fluid circulates according to the operation of the actuator 130 and the flow of the hydraulic cylinder 210, the flow of the fluid is selectively controlled by the control valve 230, and by the pressure sensor 232. The pressure of the fluid is measured and displayed externally.

On the other hand, since the displacement sensor 132 is mounted on the actuator 130 which is the test sample, the user can recognize the load performance of the actuator 130 by the value measured by the displacement sensor 132. .

The scope of the present invention is not limited to the above-exemplified embodiments, and many other modifications based on the present invention will be possible to those skilled in the art within the above technical scope.

1 is a front view showing the configuration of a preferred embodiment of the linear force actuator load test apparatus according to the present invention.

Figure 2 is a left side view of the embodiment of the present invention shown in Figure 1;

Figure 3 is a circuit diagram of a preferred embodiment of the linear power actuator load test apparatus according to the present invention.

Explanation of symbols on the main parts of the drawings

100. Test stand 120. Load cell

130. Actuator 200. Load generating means

210. Hydraulic cylinder 220. Oil storage

230. Control valve

Claims (8)

A test stand 100 supporting a plurality of components; A load cell 120 provided at one side of the test stand 100 and measuring a load; An actuator support 132 integrally formed on one side of the test stand 100 and supporting an actuator 130 which becomes a test sample; It is provided on one side of the test stand (100), and has a configuration including a load generating means (200) for generating a load; The load generating means 200, Hydraulic cylinder 210 is provided with a two-way piston rod, the reservoir 220 for storing the fluid, and the control valve 230 for adjusting the flow rate and pressure of the fluid supplied to the hydraulic cylinder (210) is provided Linear force actuator load tester. The method of claim 1, wherein the upper side of the test stand 100, A sliding plate 104 sliding along the longitudinal direction of the test stand 100 and a load cell support 106 fixed to the sliding plate 104; The load cell 120, the linear force actuator load test apparatus, characterized in that fixed to the load cell support 106. The method of claim 1 or 2, wherein the control valve 230, A linear force actuator load tester, characterized in that it consists of a servo valve, which regulates the flow rate and the pressure of the fluid according to the strength of the current. The method of claim 3, wherein the control valve 230, A linear force actuator load test apparatus, characterized in that the pressure sensor 232 and the pressure gauge 234 for measuring the pressure of the fluid is provided. The method of claim 4, wherein one side of the actuator 130, Linear force actuator load test apparatus, characterized in that the displacement sensor 132 further measures the moving distance of the rod constituting the actuator (130). The apparatus of claim 5, wherein the plurality of flow paths connected to the hydraulic cylinders (210) are provided with check valves (C) for limiting one-way flow of the fluid. According to claim 1, One side of the test stand 100, The linear force actuator load test device, characterized in that the cylinder support (212) for supporting the hydraulic cylinder 210 is formed integrally. 8. The linear force actuator load testing apparatus according to claim 7, wherein one side of the hydraulic cylinder (210) is further provided with a filter (P).

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