Engine hydraulic system functional testing equipment

Abstract

This application provides a functional testing device for an engine hydraulic system, relating to engine testing. It includes a frame, an oil tank, a motor, an oil pump, a tee, a main return oil pipe, an unloading oil pipe, and monitoring devices. The oil tank is mounted on the frame, and the motor is also mounted on the frame. The oil pump is drivenly connected to the motor, and its inlet is connected to the outlet of the oil tank. The tee is installed at the outlet of the oil pump. One end of the main return oil pipe is connected to the tee, and the other end is connected to the oil tank. One end of the unloading oil pipe is connected to the tee, and the other end is connected to the oil tank. A safety valve is installed on the unloading oil pipe. Two sets of monitoring devices are installed on the main return oil pipe and the unloading oil pipe, respectively. This application evaluates the cooperative performance and stability of the oil pump and the safety valve.

Description

Technical Field

[0001] This application relates to the field of engine testing, and more specifically, to a functional testing device for an engine hydraulic system. Background Technology

[0002] For large engine hydraulic systems, pressure stability, as a key performance indicator, is affected by multiple complex factors, resulting in a high degree of system complexity. These factors include, but are not limited to, the matching performance between the safety valve and the oil pump, as well as the manufacturing quality of core components such as the oil pump and safety valve.

[0003] Current testing systems widely used in the industry have significant limitations: they can either only perform independent stability tests on safety valves or only conduct separate performance tests on oil pumps. This testing approach cannot assess the coordinated performance of the oil pump and safety valve, and in particular, it cannot comprehensively test the overall stability performance when the two are operating in combination. Utility Model Content

[0004] The purpose of this application is to provide a functional testing device for an engine hydraulic system, which can evaluate the coordinated working performance of the oil pump and the safety valve, and comprehensively test the overall stability performance of the two when they are running in combination.

[0005] This utility model provides a functional testing device for an engine hydraulic system. The device includes a frame, an oil tank, a motor, an oil pump, a tee, a main return oil pipe, an unloading oil pipe, and a monitoring device. The oil tank is mounted on the frame, the motor is mounted on the frame, the oil pump is drivenly connected to the motor, and the oil inlet of the oil pump is connected to the oil outlet of the oil tank. The tee is installed at the oil outlet of the oil pump. One end of the main return oil pipe is connected to the tee, and the other end of the main return oil pipe is connected to the oil tank. One end of the unloading oil pipe is connected to the tee, and the other end of the unloading oil pipe is connected to the oil tank. The unloading oil pipe is equipped with a safety valve. The monitoring device consists of two sets, which are respectively installed on the main return oil pipe and the unloading oil pipe.

[0006] In an optional embodiment, the engine hydraulic system functional testing equipment further includes a flow regulating valve installed in the main return oil pipeline.

[0007] In an optional embodiment, the flow regulating valve is positioned relative to the monitoring device near the outlet of the main return oil pipeline.

[0008] In an optional embodiment, the engine hydraulic system function testing equipment further includes a heater installed inside the oil tank to heat the engine oil in the tank.

[0009] In an optional embodiment, the engine hydraulic system functional testing equipment further includes a frequency converter connected to the motor.

[0010] In an optional embodiment, the monitoring device includes a flow meter for monitoring the flow rate of the main return oil pipeline and the unloading oil pipeline.

[0011] In an optional embodiment, the monitoring device further includes a pressure gauge for monitoring the pressure of the main return oil pipeline and the unloading oil pipeline.

[0012] In an optional embodiment, the safety valve is installed at the oil inlet of the unloading pipeline.

[0013] In an optional embodiment, the unloading pipe between the safety valve and the monitoring device is a rigid pipe, and the unloading pipe between the monitoring device and the oil tank is a flexible pipe.

[0014] In an optional implementation, the main return oil pipeline is a rigid pipe.

[0015] Compared to existing technologies, the beneficial effects of this application are: This application achieves performance evaluation of the coordinated operation of the oil pump and safety valve by installing an oil pump and safety valve in an engine hydraulic system functional testing device, and comprehensively tests the overall stability performance of the two when they are running in combination. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A three-dimensional structural schematic diagram of the engine hydraulic system functional testing equipment in some embodiments is shown; Figure 2 Another three-dimensional structural schematic diagram of the engine hydraulic system functional test equipment in some embodiments is shown (some components are omitted); Figure 3 It shows Figure 2 Enlarged view of section A.

[0018] Explanation of key component symbols: 100-Frame; 200-Oil tank; 300-Motor; 310-Coupling; 400-Oil pump; 500-Tee; 600-Main return oil pipe; 610-Flow regulating valve; 611-Adjusting handle; 700-Unloading oil pipe; 710-Safety valve; 800-Monitoring device; 900-Suction pipe. Detailed Implementation

[0019] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0020] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0022] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] Example 1 Please see Figure 1 and Figure 2 This embodiment is applicable to the hydraulic system test of the engine. The test content is to evaluate the cooperative working performance of the oil pump 400 and the safety valve 710, and to detect the overall stability performance of the two when they are running in combination.

[0025] This embodiment provides an engine hydraulic system function testing device, which includes a frame 100, an oil tank 200, a motor 300, an oil pump 400, a three-way valve 500, a main return oil pipe 600, an unloading oil pipe 700, and a monitoring device 800.

[0026] The rack 100 provides a stable installation space.

[0027] The oil tank 200 is mounted on the frame 100. Specifically, the oil tank 200 is installed in the mounting space of the frame 100, and the oil tank 200 contains enough oil to meet the test requirements.

[0028] The motor 300 is mounted on the frame 100. In this embodiment, the engine hydraulic system function test equipment can also include a frequency converter (not shown in the figure) and a coupling 310. The frequency converter is connected to the motor 300, and the motor 300 adjusts its speed through the frequency converter to achieve stepless speed regulation. The coupling 310 is connected to the motor 300 and the oil pump 400 respectively, and is located between the motor 300 and the oil pump 400. The motor 300 drives the oil pump 400 to start through the coupling 310, and the oil pump 400 draws oil from the oil tank 200.

[0029] The oil pump 400 is connected to the motor 300, and the oil inlet of the oil pump 400 is connected to the oil outlet of the oil tank 200. Since the motor 300 has a stepless speed regulation function, the oil pump 400 can realize stepless control of the pump flow rate, control the total output flow of the oil pump 400, and improve the test accuracy.

[0030] In this embodiment, an oil suction pipe 900 can be set between the oil pump 400 and the oil tank 200. One end of the oil suction pipe 900 is connected to the oil inlet of the oil pump 400, and the other end is connected to the oil outlet of the oil tank 200.

[0031] The three-way valve 500 is installed at the oil outlet of the oil pump 400. The three-way valve 500 has three connectors, which are defined as the first connector, the second connector and the third connector. The first connector is connected to the oil outlet of the oil pump 400 to realize the oil inlet of the three-way valve 500, and the second connector and the third connector are used for the oil outlet of the three-way valve 500.

[0032] One end of the main return oil pipe 600 is connected to the tee 500, and the other end of the main return oil pipe 600 is connected to the oil tank 200. In this embodiment, one end of the main return oil pipe 600 is connected to the second connector. After the oil is drawn out from the oil suction pipe 900, it returns to the oil tank 200 through the main return oil pipe 600.

[0033] In this embodiment, the main return oil pipeline 600 can be configured as a rigid pipe.

[0034] One end of the unloading pipe 700 is connected to the tee 500, and the other end of the unloading pipe 700 is connected to the oil tank 200. In this embodiment, one end of the unloading pipe 700 is connected to the third connector.

[0035] The oil unloading pipe 700 is equipped with a safety valve 710. Specifically, the safety valve 710 is installed at the oil inlet of the oil unloading pipe 700. When the pressure does not reach the set pressure of the safety valve 710, the oil flows back to the oil tank 200 only from the main return oil pipe 600. When the pressure reaches the set pressure of the safety valve 710, the excess oil flows back to the oil tank 200 from the safety valve 710 and the oil unloading pipe 700.

[0036] The unloading pipe 700 between the safety valve 710 and the monitoring device 800 is a rigid pipe, while the unloading pipe 700 between the monitoring device 800 and the oil tank 200 is a flexible pipe.

[0037] Two sets of monitoring devices 800 are installed on the main return oil pipeline 600 and the unloading oil pipeline 700, respectively. Each monitoring device 800 includes a flow meter and a pressure gauge. The flow meter monitors the flow rate in the main return oil pipeline 600 and the unloading oil pipeline 700. The pressure gauge monitors the pressure in the main return oil pipeline 600 and the unloading oil pipeline 700.

[0038] In this embodiment, the flow rate and pressure stability are monitored in real time using a flow meter and a pressure gauge, and the coordinated working performance of the oil pump 400 and the safety valve 710 is evaluated using flow rate and pressure data.

[0039] In some embodiments, the engine hydraulic system functional testing equipment further includes a flow regulating valve 610, which is installed in the main return oil pipeline 600. The flow regulating valve 610 is used to regulate the load on the main return oil pipeline 600, thereby testing the comprehensive stability of the oil pump 400 and the safety valve 710 under different loads.

[0040] Please see Figure 2 and Figure 3 The flow regulating valve 610 is positioned relative to the monitoring device 800 near the oil outlet of the main return oil pipeline 600. In this embodiment, the flow regulating valve 610 is equipped with an adjusting handle 611. The opening degree of the flow regulating valve 610 is controlled by rotating the adjusting handle 611, thereby controlling the flow rate of the engine oil.

[0041] Please continue reading. Figure 1 and Figure 2 In some embodiments, the engine hydraulic system function test equipment also includes a heater (not shown in the figure), which is installed in the oil tank 200 to heat the oil in the oil tank 200. The heater is used to test the effect of different oil temperatures on pressure stability.

[0042] For example, when the temperature is high, the viscosity of the engine oil decreases. Test the effect of high-temperature engine oil on the hydraulic components in the engine hydraulic system, especially whether it affects the stiffness of the hydraulic component springs.

[0043] It is understood that this embodiment is designed to test the oil pump 400 and the safety valve 710. Therefore, the other components besides the oil pump 400 and the safety valve 710 are common components and are installed as a whole for backup. Before testing, the oil pump 400 and the safety valve 710 to be tested can be installed.

[0044] This application achieves a performance evaluation of the coordinated operation of the oil pump 400 and the safety valve 710 by installing an oil pump 400 and a safety valve 710 in an engine hydraulic system functional testing device, and comprehensively tests the overall stability performance of the two when they are running in combination.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A functional testing device for an engine hydraulic system, characterized in that, The system includes a frame, an oil tank, a motor, an oil pump, a tee, a main return oil pipe, an unloading oil pipe, and monitoring devices. The oil tank is mounted on the frame, the motor is mounted on the frame, the oil pump is driven and connected to the motor, and the oil inlet of the oil pump is connected to the oil outlet of the oil tank. The tee is installed at the oil outlet of the oil pump. One end of the main return oil pipe is connected to the tee, and the other end of the main return oil pipe is connected to the oil tank. One end of the unloading oil pipe is connected to the tee, and the other end of the unloading oil pipe is connected to the oil tank. The unloading oil pipe is equipped with a safety valve. The monitoring devices consist of two sets, which are respectively installed on the main return oil pipe and the unloading oil pipe.

2. The engine hydraulic system functional testing equipment as described in claim 1, characterized in that, It also includes a flow regulating valve, which is installed in the main return oil pipeline.

3. The engine hydraulic system functional testing equipment as described in claim 2, characterized in that, The flow regulating valve is located near the oil outlet of the main return oil pipeline relative to the monitoring device.

4. The engine hydraulic system functional testing equipment as described in claim 2, characterized in that, It also includes a heater, which is installed inside the oil tank to heat the oil in the tank.

5. The engine hydraulic system functional testing equipment as described in claim 4, characterized in that, It also includes a frequency converter, which is connected to the motor.

6. The engine hydraulic system functional testing equipment as described in any one of claims 1 to 5, characterized in that, The monitoring device includes a flow meter, which is used to monitor the flow rate of the main return oil pipeline and the unloading oil pipeline.

7. The engine hydraulic system functional testing equipment as described in claim 6, characterized in that, The monitoring device also includes a pressure gauge, which is used to monitor the pressure of the main return oil pipeline and the unloading oil pipeline.

8. The engine hydraulic system functional testing equipment as described in any one of claims 1 to 5, characterized in that, The safety valve is installed at the oil inlet of the unloading pipeline.

9. The engine hydraulic system functional testing equipment as described in claim 8, characterized in that, The unloading pipe between the safety valve and the monitoring device is a rigid pipe, while the unloading pipe between the monitoring device and the oil tank is a flexible pipe.

10. The engine hydraulic system functional testing equipment as described in any one of claims 1 to 5, characterized in that, The main return oil pipeline is a rigid pipe.

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