Gearbox operating valve test bed

Abstract

The invention belongs to the technical field of mechanical part testing, and provides a gearbox operating valve test bed. A gearbox operating valve test bed comprises a flow control oil way, a tested valve body and an oil supply way, the flow control oil way is provided with a first outlet end and a second outlet end, the first outlet end is the tested valve body, the second outlet end is the oil supply way, the flow control oil way comprises a first valve body and a control valve block, and flow meters are arranged at the two ends of the first valve body. The flow meters comprise the first flow meter and the second flow meter, the first flow meter is located on the side, close to the first valve body, of the tested valve body, and the second flow meter is located between the control valve block and the first valve body. The real-time output pressure of the oil supply path is monitored, so that an oil path element is protected, and the first valve body and the subsequent detected valve body are prevented from being damaged; and measuring the flow of the input end of the measured valve body by adopting a first flow meter to obtain the flow feedback information of the working condition of the measured valve body.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical component testing and provides a gearbox control valve test bench. Background Art

[0002] The hydraulic system is the most important system of the gearbox, and the control valve is the core component of the hydraulic system. It is responsible for distributing the oil output from the pump to each clutch as needed and ensuring the stability of the clutch charging pressure. Therefore, the performance of the control valve is crucial to the gearbox. The prior art CN112729810B provides a test assembly, test method and test system for a gearbox oil pump and a functional valve, which integrates the performance test of the gearbox oil pump and the performance test of the functional valve. Among them, a calibration oil circuit is used to match the pipe diameters of different gearbox oil pumps, and the actual flow resistance of the gearbox oil pump after being installed in the gearbox is simulated to a great extent, thereby improving the accuracy of the gearbox detection; at the same time, a dynamic oil pressure test oil circuit and a static oil pressure test oil circuit are used to simulate the different flow and pressure conditions corresponding to each functional valve on the gearbox oil pump when the gearbox oil pump is changing speed, so as to achieve the matching of the gearbox flow and pressure. The prior art can meet the customer's real simulation test of each functional valve on the oil pump. The inventor believes that the prior art has room for improvement. Summary of the invention

[0003] The purpose of the present invention is to use multiple independent flow meters outside the tested valve body to independently measure the total flow of the flow control oil circuit and the flow fed back to the input end of the working condition of the tested valve body, so as to avoid disassembling the tested valve body. Secondly, the test equipment of the existing gearbox control valve test bench is streamlined to make the existing test equipment easy to disassemble; and improve the versatility of the gearbox control valve test bench. To this end, the present invention provides a gearbox control valve test bench, including a flow control oil circuit, a tested valve body and an oil supply oil circuit, the flow control oil circuit is provided with a first outlet end and a second outlet end, the first outlet end is the tested valve body, and the second outlet end is the oil supply oil circuit, the flow control oil circuit includes a first valve body and a control valve block, both ends of the first valve body are provided with flow meters, the flow meters include a first flow meter and a second flow meter, the first flow meter is located on the side of the tested valve body close to the first valve body, and the second flow meter is located between the control valve block and the first valve body. A second flowmeter is used to measure the total flow from the oil supply circuit to the first valve body, and the real-time output pressure of the pump of the oil supply circuit is monitored, so that the operator can judge the pressure stability of the oil supply circuit, thereby protecting the oil circuit components and avoiding damage to the first valve body and the subsequent valve body to be tested; further, the first valve body is a ball valve, which can control the oil supply circuit, control the flow to the valve body to be tested, and deliver the excess flow to the oil tank; the first flowmeter is used to measure the flow at the input end of the valve body to be tested, and obtain the flow information fed back by the valve body to be tested under the working pressure. For example, under different oil supply circuit pressures below the rated pressure of the valve body to be tested, the total system flow at the second flowmeter and the feedback flow of the valve body to be tested at the first flowmeter are collected, and the corresponding flow changes of the valve body to be tested at different pressures can be measured; above the rated pressure of the valve body to be tested and below the rated pressure of the gearbox control valve test bench, the total system flow of the second flowmeter and the feedback flow of the valve body to be tested at the first flowmeter are collected, and the pressure limiting capacity of the valve body to cope with pressure exceeding the rated pressure can be measured.

[0004] Preferably, the flow control oil circuit further comprises an oil separation oil circuit, the oil separation oil circuit connects the first valve body and the oil supply oil circuit, and the oil separation oil circuit is provided with an adjustable pressure reducing valve and a first overflow valve in parallel, and the adjustable pressure reducing valve and the first overflow valve are both connected to the first valve body and the oil supply oil circuit. The oil separation oil circuit is provided with an adjustable pressure reducing valve and a first overflow valve in parallel to ensure that the input pressure is maintained within the upper limit range, and the first overflow valve protects the first valve body and the valve body to be tested from being damaged or even leaking due to the oil pressure of the oil supply oil circuit.

[0005] Preferably, the control valve block includes a switch control valve, and the switch control valve of the gearbox operating valve test bench is a one-way valve, which unidirectionally conducts the oil circuit from the oil supply circuit to the first valve body. The switch control valve is set to control the on-off of the oil circuit, so that the oil circuit between the oil supply circuit and the valve body to be tested can be cut off in time, so as to avoid the mutual influence caused by abnormal phenomena between the oil supply circuit and the valve body to be tested during the experiment, resulting in the chain scrapping of the gearbox control valve test bench and the valve body to be tested, thereby reducing the loss cost of test failure; the switch control valve is a one-way valve, so as to avoid the oil pressure in the oil supply circuit dropping or stopping the oil supply, so that the oil pressure inside the valve body to be tested is greater than the oil pressure in the oil supply circuit, resulting in oil return phenomenon, resulting in damage to the oil circuit components of the oil supply circuit.

[0006] Preferably, the control valve block includes an accumulator, and the oil circuit between the accumulator and the switch control valve is provided with a second relief valve, and the second relief valve is connected to the oil supply circuit. The accumulator can absorb the pressure pulse at the end of the oil supply circuit, ensure the stability of the oil pressure provided by the oil supply circuit, and avoid the first valve body and the valve body to be tested from being subjected to abnormal oil impact, for example, the pressure pulse generated when the oil pressure of the oil supply circuit is quickly raised and lowered; the pressure pulse generated when the oil pressure change is transformed, etc.

[0007] Preferably, the oil supply circuit includes an oil tank, and a temperature control device is provided in the oil tank. The temperature control device includes a heater and a cooler. The oil tank is provided with an outlet end, and the outlet end is connected to the control valve block. The temperature control device provided in the oil tank can adjust the temperature of the oil in the oil circuit. The maximum oil temperature does not exceed 130°C, and the minimum temperature is not lower than -20°C. It is used to simulate the oil temperature of different working conditions, for example, the high temperature state of the oil in the valve body to be tested under long-term work; the low temperature state of the oil received by the valve body to be tested when the gearbox is started in a cold environment; and the working state of the oil in the valve body to be tested from low temperature to high temperature due to the working time, etc., so that the valve body to be tested can be fully and truly simulated to improve the comprehensiveness of the test.

[0008] Preferably, the oil supply circuit also includes a filter and a metering pump, the oil circuit between the outlet and the control valve block is provided with a filter and a metering pump, the oil tank is provided with at least two inlet ports, and the inlet ports are connected to the first overflow valve and the second overflow valve. The oil tank is provided with multiple inlet ports, collecting the oil overflowing from the first overflow valve and the second overflow valve back to the oil tank, reducing the waste of oil in the oil circuit, and using a filter to filter the oil circuit provided by the oil supply circuit, reducing the impurity content in the oil during the oil supply process, and preventing the impurities in the oil from damaging the subsequent oil circuit components; the main pump motor drives the metering pump to suck the oil in the oil tank into the metering pump.

[0009] Preferably, both ends of the valve body to be tested are provided with quick connectors, one end of the quick connector is directly connected to the valve body to be tested, and the other end of the quick connector is connected to the flow control oil circuit. The connectors at both ends of the valve body to be tested use quick connectors to increase the speed of disassembly and assembly of the valve body to be tested; the connection end of the quick connector directly connected to the flow control oil circuit is fixed, and only the connection end with the valve body to be tested needs to be replaced, which can improve the versatility of the gearbox control valve test bench and adapt to different types of valve bodies to be tested.

[0010] Preferably, a flange is provided at the connection end of the quick connector, the interior of the flange is a conical surface, and a stopper is provided on the outer side of the middle part of the flange. The stopper on the outer side of the middle part of the flange can limit the matching length of the quick connector and the flow control oil circuit when the quick connector connects the flow control oil circuit and the valve body to be tested, and limit the matching length of the quick connector and the flow control oil circuit.

[0011] The present invention provides a gearbox control valve test bench, comprising a flow control oil circuit, a tested valve body and an oil supply oil circuit, the flow control oil circuit is provided with a first outlet end and a second outlet end, the first outlet end is the tested valve body, the second outlet end is the oil supply oil circuit, the flow control oil circuit comprises a first valve body and a control valve block, both ends of the first valve body are provided with flow meters, the flow meters comprise a first flow meter and a second flow meter, the first flow meter is located on a side of the tested valve body close to the first valve body, the second flow meter is located between the control valve block and the first valve body, and has the following beneficial effects: ensuring that the input pressure is maintained within an upper limit range, the oil leaked from the overflow valve can be collected and directly returned to the oil tank; the oil tank is provided with a heater and a cooler, which can simulate the oil temperature within a certain range; absorbing the pressure impact of the oil supply oil circuit, eliminating pulsation, providing a stable oil source to the tested valve body, and eliminating interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0013] Figure 1 It is a structural schematic diagram of a gearbox control valve test bench of the present invention; Figure 2 It is a structural schematic diagram of the control valve block of the present invention; Figure 3 It is a structural schematic diagram of the flow control oil circuit of the present invention; Figure 4 It is a structural schematic diagram of the connection structure of the valve body to be tested of the present invention; Figure 5 It is a schematic structural diagram of the quick connector of the present invention.

[0014] Explanation of reference numerals: 1 oil tank; 2 temperature sensor; 3 main pump motor; 4 metering pump; 5 filter; 6 control valve block; 61 accumulator; 62 switch control valve; 63 second relief valve; 7 second flow meter; 8 first valve body; 9 first flow meter; 10 oil distribution circuit; 101 first relief valve; 102 adjustable pressure reducing valve; 11 measured valve body; 12 small motor; 13 hydraulic pump; 14 cooler; 15 quick connector; 151 flange. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0016] Embodiment 1 like Figure 1 As shown, a gearbox control valve test bench, in this embodiment, consists of an oil tank 1, a temperature sensor 2, a main pump motor 3, a metering pump 4, a filter 5, a control valve block 6, a second flowmeter 7, a first valve body 8, a first flowmeter 9, an oil distribution circuit 10, a valve body to be tested 11, a small motor 12, a hydraulic pump 13, and a cooler 14, wherein the second flowmeter 7, the first valve body 8, and the first flowmeter 9 constitute a flow control circuit, the flow control circuit is provided with a first outlet end and a second outlet end, the first outlet end is the valve body to be tested 11, and the second outlet end is the oil supply circuit, the flow control circuit includes the first valve body 8 and the control valve block, both ends of the first valve body 8 are provided with flowmeters, the flowmeters include the first flowmeter and the second flowmeter 7, the first flowmeter is located on the side of the valve body to be tested 11 close to the first valve body 8, and the second flowmeter 7 is located between the control valve block and the first valve body 8. The second flowmeter 7 is used to measure the total flow from the oil supply circuit to the first valve body 8, and the real-time output pressure of the pump of the oil supply circuit is monitored, so that the operator can judge the pressure stability of the oil supply circuit, thereby protecting the oil circuit components and avoiding damage to the first valve body 8 and the subsequent tested valve body 11; further, the first valve body 8 is a ball valve that can control the oil supply, control the flow to the tested valve body 11, and deliver the excess flow to the oil tank; the first flowmeter is used to measure the flow at the input end of the tested valve body 11, and obtain the flow feedback of the tested valve body 11 under the working pressure. For example, under different oil supply line pressures below the rated pressure of the tested valve body 11, the total system flow at the second flowmeter 7 and the feedback flow of the tested valve body 11 at the first flowmeter are collected, so that the corresponding flow changes of the tested valve body 11 at different pressures can be measured; when the pressure is above the rated pressure of the tested valve body 11 and below the rated pressure of the transmission control valve test bench, the total system flow of the second flowmeter 7 and the feedback flow of the tested valve body 11 at the first flowmeter are collected, so that the pressure limiting capacity of the tested valve body 11 to cope with the pressure exceeding the rated pressure can be measured.

[0017] like Figure 3 The flow control oil circuit includes a second flow meter 7, a first valve body 8, and a first flow meter 9. The flow control oil circuit also includes an oil separation oil circuit 10. The oil separation oil circuit 10 connects the first valve body 8 and the oil supply oil circuit. The oil separation oil circuit 10 is provided with an adjustable pressure reducing valve 102 and a first overflow valve in parallel. The adjustable pressure reducing valve 102 and the first overflow valve are both connected to the first valve body 8 and the oil supply oil circuit. The oil from the oil supply oil circuit is measured by the second flow meter 7 to obtain a total flow rate. The oil passes through the first valve body 8. The oil separation oil circuit 10 is provided with an adjustable pressure reducing valve 102 and a first overflow valve in parallel to ensure that the input pressure is maintained within the upper limit range. The first overflow valve protects the first valve body 8 and the valve body 11 to be tested from being damaged or even leaking due to the oil pressure of the oil supply oil circuit.

[0018] like Figure 2 As shown, the control valve block includes a switch control valve, and the switch control valve of the gearbox operating valve test bench is a one-way valve, which unidirectionally conducts the oil circuit from the oil supply oil circuit to the first valve body 8. The switch control valve is set to control the on-off of the oil circuit, which can timely cut off the oil circuit between the oil supply oil circuit and the valve body to be tested, so as to avoid the mutual influence caused by abnormal phenomena between the oil supply oil circuit and the valve body to be tested during the experiment, resulting in the chain scrapping of the gearbox control valve test bench and the valve body to be tested, thereby reducing the loss cost of test failure; the switch control valve is a one-way valve, which avoids the oil pressure inside the valve body to be tested 11 greater than the oil pressure of the oil supply oil circuit after the oil supply oil circuit drops or stops supplying oil, resulting in oil return phenomenon, which causes damage to the oil circuit components of the oil supply oil circuit.

[0019] The control valve block includes an accumulator 61, and the oil circuit between the accumulator 61 and the switch control valve is provided with a second relief valve 63, and the second relief valve 63 is connected to the oil supply oil circuit. The accumulator 61 can absorb the pressure pulse at the end of the oil supply oil circuit, ensure the stability of the oil pressure provided by the oil supply oil circuit, and prevent the first valve body 8 and the valve body to be tested from being subjected to abnormal oil impact, such as the pressure pulse generated when the oil pressure of the oil supply oil circuit is quickly increased and decreased; the pressure pulse generated when the oil pressure changes and changes, etc.

[0020] like Figure 1As shown, the oil supply circuit includes an oil tank 1, a temperature sensor 2, a main pump motor 3, a metering pump 4, and a filter 5. The outlet section of the metering pump 4 is connected to the filter 5, and the oil reaches the control valve block 6 through the filter 5. The oil supply circuit includes an oil tank, and a temperature control device is provided in the oil tank. The temperature control device includes a heater and a cooler 14. The oil tank is provided with an outlet end, and the outlet end is connected to the control valve block. The oil tank is provided with a temperature control device to adjust the temperature of the oil. The maximum oil temperature does not exceed 130°C, which is used to simulate the oil temperature of different working conditions, for example, the high temperature state of the oil of the valve body to be tested under long-term work; the low temperature state of the oil received by the valve body to be tested when the gearbox is started in a cold environment, so that the valve body to be tested can be fully simulated and tested, thereby improving the comprehensiveness of the test.

[0021] The oil supply circuit also includes a filter 5 and a metering pump 4. The oil circuit between the outlet and the control valve block is provided with a filter 5 and a metering pump 4. The oil tank is provided with at least two inlet ports, and the inlet ports are connected to the first overflow valve and the second overflow valve 63. The oil tank is provided with multiple inlet ports, and the oil overflowing from the first overflow valve and the second overflow valve 63 is collected and returned to the oil tank to reduce the waste of oil in the oil circuit. The filter 5 is used to filter the oil circuit provided by the oil supply circuit to reduce the impurity content in the oil during the oil supply process, and to prevent the impurities in the oil from damaging the subsequent oil circuit components; the main pump motor drives the metering pump 4 to suck the oil in the oil tank into the metering pump 4.

[0022] like Figure 4 As shown, both ends of the tested valve body 11 are provided with quick connectors 15, one end of the quick connector 15 is directly connected to the tested valve body 11, and the other end of the quick connector 15 is connected to the flow control oil circuit. The connectors at both ends of the tested valve body 11 use quick connectors 15 to increase the disassembly and assembly speed of the tested valve body 11; the connection end of the quick connector 15 directly connected to the flow control oil circuit is fixed, and only the connection end with the tested valve body 11 needs to be replaced, which can improve the versatility of the gearbox control valve test bench and adapt to different types of tested valve bodies 11.

[0023] like Figure 5 As shown, the connection end of the quick connector 15 is provided with a flange 151, the interior of the flange 151 is a conical surface, and a baffle is provided on the outer side of the middle part of the flange 151. The baffle on the outer side of the middle part of the flange 151 can limit the matching length of the quick connector 15 and the flow control oil circuit when the quick connector 15 connects the flow control oil circuit and the valve body 11 to be tested, and limit the matching length of the quick connector 15 and the flow control oil circuit; the interior of the flange is a conical surface, and the cone angle of the conical surface is 24° in this embodiment. The conical surface gradually reduces the internal pipe diameter of the flange, speeds up the flow rate of the oil at the flange, and relatively improves the sealing performance at the flange to prevent oil leakage.

[0024] The present invention provides a gearbox control valve test bench, comprising a flow control oil circuit, a tested valve body 11 and an oil supply oil circuit, the flow control oil circuit is provided with a first outlet end and a second outlet end, the first outlet end is the tested valve body 11, and the second outlet end is the oil supply oil circuit, the flow control oil circuit comprises a first valve body 8 and a control valve block, both ends of the first valve body 8 are provided with flow meters, the flow meters comprise a first flow meter and a second flow meter 7, the first flow meter is located on the side of the tested valve body 11 close to the first valve body 8, the second flow meter 7 is located between the control valve block and the first valve body 8, and has the following beneficial effects: ensuring that the input pressure is maintained within an upper limit range, and the oil leaked from the overflow valve can be collected and directly returned to the oil tank; the oil tank is provided with a heater and a cooler 14, which can simulate the oil temperature within a certain range; absorbing the pressure shock of the oil supply oil circuit, eliminating pulsation, providing a stable oil source to the tested valve body 11, and eliminating interference.

[0025] The above embodiments and / or implementation methods are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any form. Any technical personnel in this field may make slight changes to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention.

Claims

1. A gearbox control valve test bench, comprising a flow control oil circuit, a valve body (11) to be tested and an oil supply oil circuit, characterized in that: The flow control oil circuit is provided with a first outlet end and a second outlet end, the first outlet end is a tested valve body (11), and the second outlet end is an oil supply oil circuit, the flow control oil circuit comprises a first valve body (8), at least two flow meters and a control valve block (6), both ends of the first valve body (8) are provided with flow meters, the flow meters comprise a first flow meter (9) and a second flow meter (7), the first flow meter (9) is located on a side of the tested valve body (11) close to the first valve body (8), and the second flow meter (7) is located between the control valve block (6) and the first valve body (8).

2. A transmission control valve test bench according to claim 1, characterized in that: The flow control oil circuit further comprises an oil distribution oil circuit (10), wherein the oil distribution oil circuit (10) is connected to the first valve body (8) and the oil supply oil circuit, and the oil distribution oil circuit (10) is provided with an adjustable pressure reducing valve (102) and a first overflow valve (101) in parallel, and the adjustable pressure reducing valve (102) and the first overflow valve (101) are both connected to the first valve body (8) and the oil supply oil circuit.

3. The transmission control valve test bench according to claim 1, characterized in that: The control valve block (6) comprises a switch control valve (62); the switch control valve (62) of the gearbox operating valve test bench is a one-way valve; the switch control valve (62) unidirectionally conducts the oil passage from the oil supply passage to the oil passage of the first valve body (8).

4. A transmission control valve test bench according to claim 3, characterized in that: The control valve block (6) comprises an accumulator (61), and the oil circuit between the accumulator (61) and the switch control valve (62) is provided with a second overflow valve (63), and the second overflow valve (63) is connected to the oil supply circuit.

5. The transmission control valve test bench according to claim 1, characterized in that: The oil supply circuit comprises an oil tank (1), a temperature control device is provided in the oil tank (1), the temperature control device comprises a heater and a cooler (14), and the oil tank (1) is provided with an outlet end, the outlet end is connected to the control valve block (6).

6. A transmission control valve test bench according to claim 5, characterized in that: The oil supply circuit further comprises a filter (5) and a metering pump (4); the oil circuit between the outlet end and the control valve block (6) is provided with a filter (5) and a metering pump (4); the oil tank (1) is provided with at least two inlet ends, the inlet ends being connected to the first overflow valve (101) and the second overflow valve (63).

7. The transmission control valve test bench according to claim 1, characterized in that: Both ends of the tested valve body (11) are provided with quick connectors (15), one end of the quick connector (15) is directly connected to the tested valve body (11), and the other end of the quick connector (15) is connected to the flow control oil circuit.

8. The transmission control valve test bench according to claim 1, characterized in that: Both ends of the quick connector (15) are flanges (151), the interior of the connection end of the flange (151) is a conical surface, and a stopper is provided on the outside of the middle part of the flange (151).

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