Oil supply system matching test equipment

Abstract

The present invention discloses an oil supply system matching test device, comprising: an oil supply pressure-boosting and temperature-regulating flow path, a first regulating flow path, a main oil supply flow path, and a plurality of branch oil supply flow paths. Throttle valves are respectively provided in the first regulating flow path and each branch oil supply flow path, a flow meter is provided in the main oil supply flow path, and a switch valve is provided in each branch oil supply flow path, which is used to perform a single bearing cavity flow characteristic test by adjusting the switch valve in the first regulating flow path when the switch valve and the throttle valve of the measured branch oil supply flow path are fully opened. Or when the switch valve in the measured branch oil supply flow path is opened, the oil supply system matching test without a pressure regulating valve is performed by adjusting the switch valve in its flow path and the switch valve in the first regulating flow path, so as to simulate the engine oil supply system for testing when the valve is not connected. The equipment of the present invention takes into account the cavity pressure difference of the bearing cavity during the test, so that the system matching test result is more consistent with the whole machine test, thereby improving the test accuracy and test precision.

Description

Technical Field

[0001] The invention relates to the technical field of engine lubricating oil supply system, and in particular to a matching test device for the oil supply system. Background Art

[0002] The aircraft engine lubricating oil system distributes lubricating oil of a certain pressure to each lubrication point. The quantitative supply is generally achieved by controlling the oil supply pressure difference of the nozzles at each lubrication point. The oil supply pressure is in front of the nozzle, and the cavity pressure of the bearing cavity is behind the nozzle. The quantitatively supplied lubricating oil flow can ensure that the lubrication point is lubricated and cooled according to the designed flow, and at the same time ensure that the return oil pump can recover the lubricating oil in the cavity. The lubricating oil system generally realizes this function through a combination of a booster pump and a regulating valve. The pressure in each bearing cavity is inconsistent due to the difference in the sealing air pressure and the return oil pump capacity. In order to ensure that the pressure difference of each oil supply point is close, that is, the difference between the oil supply pressure and the cavity pressure of each cavity is close, an oil supply throttle nozzle is generally designed to compensate for the cavity pressure difference.

[0003] During the development of the lubricating oil system, in order to ensure the matching of the boost pump, the pressure regulating valve and the lubrication points of each cavity, it is necessary to carry out a matching test of the oil supply system. The existing test methods generally do not take into account the pressure difference of each lubricating oil cavity, and directly equate the cavity pressure to atmospheric pressure, resulting in a large difference between the test results and the whole machine; at the same time, the test is not carried out in combination with the pressure regulating valve, which leads to a certain difference between the test results and the actual working conditions of the engine. Especially for engines with large differences in pressure between each cavity, there may be problems of insufficient or excessive oil supply caused by mismatch of the oil supply system; or a separate lubricating oil pump is used to simulate the pressure regulating valve to control the back pressure, which is costly; in addition, the test process is not conducive to automated matching, resulting in low test efficiency. Summary of the invention

[0004] The present invention provides an oil supply system matching test device to solve the technical problem that the existing test method generally does not take into account the cavity pressure difference of each lubricating oil cavity, directly equates the cavity pressure to atmospheric pressure, resulting in a large difference between the test result and the whole machine.

[0005] The technical solution adopted by the present invention is as follows:

[0006] An oil supply system matching test device comprises: an oil supply, pressurizing and temperature regulating flow path for supplying lubricating oil and pressurizing and heating the lubricating oil, a first regulating flow path, a main oil supply flow path, and a plurality of branch oil supply flow paths whose oil outlet ends are respectively connected to the bearing cavity; the oil inlet ends of the first regulating flow path and the main oil supply flow path are respectively connected to the oil outlet ends of the oil supply, pressurizing and temperature regulating flow path, the oil outlet end of the first regulating flow path is connected to the oil return end of the oil supply, pressurizing and temperature regulating flow path to return oil, and the oil outlet end of the main oil supply flow path is respectively connected to the oil inlet ends of the branch oil supply flow paths; a throttle valve is respectively provided in the first regulating flow path and the branch oil supply flow paths, a flow meter is provided in the main oil supply flow path, and each branch oil supply flow path A switch valve with an opening and closing setting is also provided in the oil supply flow path, so that when the switch valve and the throttle valve in the branch oil supply flow path to be measured are fully opened, a single bearing cavity flow characteristic test is performed by adjusting the switch valve in the first regulating flow path, so as to measure the flow rate of the bearing cavity under different temperatures and pressures; or when the switch valve in the branch oil supply flow path to be measured is opened, a matching test of the oil supply system without a pressure regulating valve is performed by adjusting the switch valve in its flow path and the switch valve in the first regulating flow path, so as to simulate the engine fuel supply system for testing when the valve is not connected, and obtain the system oil supply characteristics under different temperature and pressure conditions.

[0007] Furthermore, the oil supply, boost and temperature regulation flow circuit includes a lubricating oil tank, a first oil pipe whose oil inlet end is connected to the lubricating oil tank, and a boost pump, a lubricating oil filter, a heater and a first pressure gauge for measuring the pressure in the pipeline which are sequentially arranged in the first oil pipeline along the flow direction of the lubricating oil; the oil inlet end of the first regulating flow circuit and the oil inlet end of the main oil supply flow circuit are respectively connected to the oil outlet end of the first oil pipe.

[0008] Furthermore, the first regulating flow path includes a second oil pipeline for transporting oil, and a first throttle valve and a radiator sequentially arranged in the second oil pipeline along the flow direction of the lubricating oil; the oil inlet end of the second oil pipeline is connected to the oil outlet end of the first oil pipeline, and the oil outlet end of the second oil pipeline is connected to the lubricating oil tank.

[0009] Furthermore, the main oil supply flow path includes a main oil supply pipe for oil transportation, and a first flow meter, a second flow meter and a fourth throttle valve arranged in the main oil supply pipe in sequence along the flow direction of the lubricating oil; the oil inlet end of the main oil supply pipe is connected to the oil outlet end of the first oil transportation pipe, and the oil outlet end of the main oil supply pipe is respectively connected to the oil inlet end of each branch oil supply flow path.

[0010] Furthermore, multiple groups of branch oil supply flow paths are arranged in parallel in sequence, and each branch oil supply flow path includes a branch oil supply pipe for oil transportation, and a branch switch valve, a branch first pressure meter, a branch throttle valve and a branch second pressure meter arranged in the branch oil supply pipe in sequence along the flow direction of the lubricating oil; the oil inlet end of the branch oil supply pipe is connected to the oil outlet end of the main oil supply pipe, and the oil outlet end of the branch oil supply pipe is connected to the bearing cavity.

[0011] Furthermore, the oil supply system matching test equipment also includes a second regulating flow path and a pressure regulating overflow flow path with a pressure regulating valve; the oil inlet end and the oil outlet end of the second regulating flow path are respectively connected to the oil outlet end of the oil supply boost temperature regulating flow path and the oil outlet end of the first regulating flow path, and the oil inlet end and the oil outlet end of the pressure regulating overflow flow path are respectively connected to the main oil supply flow path and the oil outlet end of the first regulating flow path; a throttle valve is also provided in the second regulating flow path, and a switch valve is also provided in the pressure regulating overflow flow path, so that when the switch valve is opened, multiple throttle valves in the first regulating flow path, the main oil supply flow path and the second regulating flow path are adjusted, and then the oil supply system matching test with the pressure regulating valve is carried out on the basis of the oil supply system matching test without the pressure regulating valve, so as to verify the matching of the oil supply system and the pressure regulating valve.

[0012] Furthermore, the second regulating flow path includes a third oil pipeline for oil transportation, and a third throttle valve, a second pressure gauge and a second throttle valve arranged in sequence in the third oil pipeline along the flow direction of the lubricating oil; the oil inlet end of the third oil pipeline is connected to the oil outlet end of the first oil pipeline, and the oil outlet end of the third oil pipeline is connected to the oil outlet end of the first regulating flow path.

[0013] Furthermore, the pressure-regulating overflow flow path includes a fourth oil pipeline for oil transportation, and a first switching valve and a pressure regulating valve sequentially arranged in the fourth oil pipeline along the flow direction of the lubricating oil; the oil inlet end of the fourth oil pipeline is connected to the main oil supply pipe between the first flow meter and the second flow meter, and the oil outlet end of the fourth oil pipeline is connected to the oil outlet end of the first regulating flow path; two pressure sensing ports for sensing pressure of the pressure regulating valve are respectively connected to the main oil supply pipe after the fourth throttle valve and the third oil pipeline between the third throttle valve and the second throttle valve.

[0014] Furthermore, the oil supply system matching test equipment also includes an oil collection and return flow path for collecting and returning all return oil in the test, and the oil collection and return flow path includes: an oil collection tank, an oil return pipe whose oil inlet end is connected to the oil collection tank, and an oil return pump connected to the return oil pipe; the oil outlet end of the bearing cavity of the branch oil supply flow path is connected to the oil collection tank; and the oil outlet end of the return oil pipe is connected to the oil outlet end of the first regulating flow path.

[0015] Furthermore, the oil supply system matching test equipment also includes a pressure regulation characteristic verification flow circuit for conducting a pressure regulation characteristic test of a separate pressure regulating valve, and the pressure regulation characteristic verification flow circuit includes: a fifth oil pipeline for oil transportation, a second switch valve and a fifth throttle valve sequentially arranged in the fifth oil pipeline; the oil inlet end of the fifth oil pipeline is connected to the oil outlet end of the main oil supply flow circuit, and the oil outlet end of the fifth oil pipeline is connected to the oil collecting tank.

[0016] The present invention has the following beneficial effects:

[0017] In the oil supply system matching test equipment of the present invention, the multifunctional use in multiple scenarios such as single bearing cavity flow characteristic test and oil supply system matching test without pressure regulating valve can be realized by simple valve switching, which reduces the time and economic cost of setting up multiple test equipment and disassembling and assembling test pieces on different equipment; on the other hand, when the test equipment of the present invention is used to perform the oil supply system matching test without pressure regulating valve, by "adjusting the opening of the throttle valve in the branch oil supply flow path and the opening of the throttle valve in the first regulating flow path, the pressure before the bearing cavity reaches the set value, and at the same time, the branch oil supply The difference before and after the throttle valve in the oil flow path is close to the set value of the bearing cavity pressure, and after the test, the opening of the throttle valve in the branch oil flow path is kept and locked. This operation allows the cavity pressure difference of the bearing cavity to be considered during the test, and the set cavity pressure is locked in the subsequent test process, rather than directly equating the cavity pressure to atmospheric pressure, so that the system matching test results are more consistent with the whole machine test, thereby improving the test accuracy and precision. At the same time, by using a throttle valve to simulate the cavity pressure, it also makes it easier to simulate multiple different bearing cavities without adding additional cavity pressure simulation equipment, which is more economical and feasible.

[0018] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 It is a schematic diagram of the oil supply system matching test equipment of the preferred embodiment of the present invention.

[0021] Legend:

[0022] 1. Oil supply, boosting and temperature regulating flow path; 11. Lubricating oil tank; 12. First oil delivery pipe; 13. Booster pump; 14. Lubricating oil filter; 15. Heater; 16. First pressure measuring device;

[0023] 2. First regulating flow path; 21. Second oil pipeline; 22. First throttle valve; 23. Radiator;

[0024] 3. Main oil supply flow path; 31. Main oil supply pipe; 32. First flow meter; 33. Second flow meter; 34. Fourth throttle valve; 35. Third pressure measuring device;

[0025] 4. branch oil supply flow path; 41. branch oil supply pipe; 42. branch switch valve; 43. branch first pressure measuring device; 44. branch throttle valve; 45. branch second pressure measuring device;

[0026] 5. Bearing cavity;

[0027] 6. Second regulating flow path; 61. Third oil pipeline; 62. Third throttle valve; 63. Second pressure measuring device; 64. Second throttle valve;

[0028] 7. Pressure regulating overflow flow path; 71. Fourth oil pipeline; 72. First switch valve; 73. Pressure regulating valve;

[0029] 8. Oil return flow path; 81. Oil return pool; 82. Oil return pipe; 83. Oil return pump;

[0030] 9. Pressure regulation characteristic verification flow path; 91. Fifth oil pipeline; 92. Second switch valve; 93. Fifth throttle valve. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0032] Reference Figure 1 The preferred embodiment of the present invention provides an oil supply system matching test device, comprising: an oil supply, pressurizing and temperature regulating flow path 1 for supplying, pressurizing and heating lubricating oil, a first regulating flow path 2, a main oil supply flow path 3, and a plurality of branch oil supply flow paths 4 whose oil outlet ends are respectively connected to the bearing cavity 5. The oil inlet ends of the first regulating flow path 2 and the main oil supply flow path 3 are respectively connected to the oil outlet ends of the oil supply, pressurizing and temperature regulating flow path 1, the oil outlet end of the first regulating flow path 2 is connected to the oil return end of the oil supply, pressurizing and temperature regulating flow path 1, and the oil outlet end of the main oil supply flow path 3 is respectively connected to the oil inlet ends of each branch oil supply flow path 4. The first regulating flow path 2 and each branch oil supply flow path 4 are respectively provided with a throttle valve, the main oil supply flow path 3 is provided with a flow meter, and each branch oil supply flow path 4 is also provided with a switch valve with an opening and closing setting, so that when the switch valve and the throttle valve in the branch oil supply flow path 4 to be measured are fully opened, the switch valve in the first regulating flow path 2 is adjusted to perform a flow characteristic test of a single bearing cavity 5, so as to measure the flow rate of the bearing cavity 5 under different temperatures and pressures. Or when the switch valve in the branch oil supply flow path 4 to be measured is opened, the switch valve in its flow path and the switch valve in the first regulating flow path 2 are adjusted to perform a matching test of the oil supply system without the pressure regulating valve 73, so as to simulate the engine oil supply system when the valve is not connected to perform the test, and obtain the system oil supply characteristics under different temperature and pressure conditions.

[0033] When the oil supply system matching test equipment of the present invention is used to conduct a single bearing cavity flow characteristic test, the steps include: the first step is to Figure 1The test equipment is built according to the schematic diagram shown, and the test pieces are connected (in the present invention, multiple bearing cavities 5 connected to the oil outlet ends of multiple branch oil supply channels 4), and all the switch valves and throttle valves in the first regulating channel 2 and each branch oil supply channel 4 are in a closed state; the second step is to fully open the switch valve and throttle valve in the first branch oil supply channel 4 that needs to be tested, and then adjust the opening of the throttle valve in the first regulating channel 2 so that the pressure at the oil outlet end of the branch oil supply channel 4 is close to the set value, and record the test data in this state (referring to the pressure of all pressure measuring points set in the test channel, the lubricating oil flow rate in the test channel, the lubricating oil temperature, etc.); the third step is to close the switch valve in the first branch oil supply channel 4, and open the switch valve and fully open the throttle valve in the second branch oil supply channel 4 that needs to be measured, and then perform the above second step, and record the test data in this state; the fourth step is to repeat the third step until the measurement of all branch oil supply channels 4 is completed. Therefore, by setting up the test flow path, the flow rate of the bearing cavity under different temperatures and pressures can be measured. Of course, a flow meter may not be set in the flow path, and the flow rate of a single nozzle inside the bearing cavity can be measured by manual oil connection.

[0034] When the oil supply system matching test equipment of the present invention is used to perform an oil supply system matching test without a pressure regulating valve, the following steps are included: Figure 1The test equipment is built according to the schematic diagram shown, and the test pieces are connected (in the present invention, multiple bearing cavities 5 connected to the oil outlet ends of multiple branch oil supply paths 4), and all the switch valves and throttle valves in the first regulating path 2 and each branch oil supply path 4 are in a closed state; the second step is to open the switch valve in the first branch oil supply path 4 to be measured, and adjust the opening of the throttle valve of the path, and at the same time adjust the opening of the throttle valve in the first regulating path 2, so that the pressure before passing through the bearing cavity reaches the set value, and at the same time the difference before and after the throttle valve in the branch oil supply path 4 is close to the set value of the bearing cavity pressure, record the test data in this state (referring to the pressure of all pressure measuring points set in the test path, the lubricating oil flow rate in the test path, the lubricating oil temperature, etc.), and keep the opening of the throttle valve in the branch oil supply path 4 and lock it; the third step is to open the second Open the switch valve in the branch oil supply flow path 4, and close the switch valve in the first branch oil supply flow path 4 at the same time, then perform the second step above, and record the test data in this state, and finally keep the opening of the throttle valve in the second branch oil supply flow path 4 and lock it; the fourth step, repeat the third step above until the measurement of all branch oil supply flow paths 4 is completed; finally, after the measurement of the last branch oil supply flow path 4 is completed, open the switch valves in all previous branch oil supply flow paths 4, and adjust the throttle valve of the first regulating flow path 2 at the same time, so that the flow meter in the main oil supply flow path 3 displays a flow rate equal to the sum of the flow rates of each bearing cavity in all branch oil supply flow paths 4 measured in the single bearing cavity flow characteristic test, and record the test data in this state (referring to the pressure of all pressure measuring points set in the test flow path, the lubricating oil flow rate in the test flow path, the lubricating oil temperature, etc.).

[0035] In the oil supply system matching test equipment of the present invention, the multifunctional use in multiple scenarios such as single bearing cavity flow characteristic test and oil supply system matching test without pressure regulating valve can be realized by simple valve switching, which reduces the time and economic cost of setting up multiple test equipment and disassembling and assembling test pieces on different equipment; on the other hand, when the test equipment of the present invention is used to perform the oil supply system matching test without pressure regulating valve, by "adjusting the opening of the throttle valve in the branch oil supply flow path 4 and the opening of the throttle valve in the first regulating flow path 2, the pressure before the bearing cavity reaches the set value, and at the same time, the branch oil supply The difference before and after the throttle valve in the oil flow path 4 is close to the set value of the bearing cavity pressure, and after the test, the opening of the throttle valve in the oil supply flow path 4 is maintained and locked. This operation allows the cavity pressure difference of the bearing cavity to be considered during the test, and the set cavity pressure is locked in the subsequent test process, rather than directly equating the cavity pressure to atmospheric pressure, so that the system matching test results are more consistent with the whole machine test, thereby improving the test accuracy and precision. At the same time, by using a throttle valve to simulate the cavity pressure, it also makes it easier to simulate multiple different bearing cavities without adding additional cavity pressure simulation equipment, which is more economical and feasible.

[0036] Alternatively, if Figure 1As shown, the oil supply boosting and temperature regulating flow path 1 includes a lubricating oil tank 11, a first oil delivery pipe 12 whose oil inlet end is connected to the lubricating oil tank 11, and a booster pump 13, a lubricating oil filter 14, a heater 15 and a first pressure measuring device 16 for measuring the pressure in the pipeline which are sequentially arranged in the first oil delivery pipe 12 along the flow direction of the lubricating oil. The oil inlet end of the first regulating flow path 2 and the oil inlet end of the main oil supply flow path 3 are respectively connected to the oil outlet end of the first oil delivery pipe 12.

[0037] Alternatively, if Figure 1 As shown, the first regulating flow path 2 includes a second oil delivery pipe 21 for delivering oil, and a first throttle valve 22 and a radiator 23 sequentially arranged in the second oil delivery pipe 21 along the flow direction of the lubricating oil. The oil inlet end of the second oil delivery pipe 21 is connected to the oil outlet end of the first oil delivery pipe 12, and the oil outlet end of the second oil delivery pipe 21 is connected to the lubricating oil tank 11.

[0038] Alternatively, if Figure 1 As shown, the main oil supply flow path 3 includes a main oil supply pipe 31 for oil delivery, and a first flow meter 32, a second flow meter 33 and a fourth throttle valve 34 sequentially arranged in the main oil supply pipe 31 along the flow direction of the lubricating oil. The oil inlet end of the main oil supply pipe 31 is connected to the oil outlet end of the first oil delivery pipe 12, and the oil outlet end of the main oil supply pipe 31 is respectively connected to the oil inlet end of each branch oil supply flow path 4.

[0039] Alternatively, if Figure 1 As shown, multiple groups of branch oil supply flow paths 4 are arranged in parallel in sequence, and each branch oil supply flow path 4 includes a branch oil supply pipe 41 for oil transportation, and a branch switch valve 42, a branch first pressure gauge 43, a branch throttle valve 44 and a branch second pressure gauge 45 arranged in the branch oil supply pipe 41 in sequence along the flow direction of the lubricating oil. The oil inlet end of the branch oil supply pipe 41 is connected to the oil outlet end of the main oil supply pipe 31, and the oil outlet end of the branch oil supply pipe 41 is connected to the bearing cavity 5.

[0040] Specifically, Figure 1 As shown, when the number of branch oil supply channels 4 is three arranged in parallel, when the test equipment of the present invention is used to perform a single bearing cavity flow characteristic test, the specific operation is as follows:

[0041] a. Build the test equipment according to the schematic diagram, connect to the three bearing chambers, and all the switch valves and throttle valves in the equipment are in the closed state;

[0042] b. The fourth throttle valve 34 is fully opened to perform flow calibration of a single bearing cavity;

[0043] c. Open the branch switch valve 42 and the branch throttle valve 44 in the first branch oil supply flow path 4 and fully open them. Adjust the opening of the first throttle valve 22 so that the value P5 of the branch second pressure gauge 45 is close to the set value. Record the test data in this state.

[0044] d. Close the branch switch valve 42 of the first branch oil supply flow path 4, open the branch switch valve 42 of the second branch oil supply flow path 4, and fully open the branch throttle valve 44, and adjust the opening of the first throttle valve 22 so that the value P5 of the second branch pressure gauge 45 in the second branch oil supply flow path 4 is close to the set value, and record the test data in this state;

[0045] e. Close the branch switch valve 42 of the second branch oil supply flow path 4, open the branch switch valve 42 of the third branch oil supply flow path 4, and fully open the branch throttle valve 44, and adjust the opening of the first throttle valve 22 so that the value P5 of the second pressure gauge 45 in the branch of the third branch oil supply flow path 4 is close to the set value, and record the test data in this state.

[0046] Specifically, Figure 1 As shown, when the number of branch oil supply flow paths 4 is three arranged in parallel, when the test equipment of the present invention is used to perform an oil supply system matching test without a pressure regulating valve, the specific operation is as follows:

[0047] a. Build the test equipment according to the schematic diagram, connect to the three bearing chambers, and all the switch valves and throttle valves in the equipment are in the closed state;

[0048] f. Open the branch switch valve 42 of the first branch oil supply flow path 4, adjust the opening of the branch throttle valve 44, and adjust the opening of the first throttle valve 22 at the same time, so that the value P5 of the second pressure measuring device 45 of the branch before the bearing cavity reaches the set value, and at the same time, the difference between the values ​​P4 and P5 of the first pressure measuring device 43 of the branch is close to the set value of the bearing cavity pressure, record the test data in this state, keep the opening of the branch throttle valve 44 in the first branch oil supply flow path 4 and lock it;

[0049] g. Close the branch switch valve 42 in the first branch oil supply flow path 4, and open the branch switch valve 42 in the second branch oil supply flow path 4, adjust the opening of the branch throttle valve 44, and adjust the opening of the first throttle valve 22, so that the value P5 of the second pressure measuring device 45 of the branch before the bearing cavity reaches the set value, and at the same time, the difference between the values ​​P4 and P5 of the first pressure measuring device 43 of the branch is close to the set value of the bearing cavity pressure, record the test data in this state, keep the opening of the branch throttle valve 44 in the second branch oil supply flow path 4 and lock it;

[0050] h. Close the branch switch valve 42 in the second branch oil supply flow path 4, and open the branch switch valve 42 in the third branch oil supply flow path 4, adjust the opening of the branch throttle valve 44, and adjust the opening of the first throttle valve 22, so that the value P5 of the second pressure measuring device 45 of the branch before the bearing cavity reaches the set value, and at the same time, the difference between the values ​​P4 and P5 of the first pressure measuring device 43 of the branch is close to the set value of the bearing cavity pressure, record the test data in this state, keep the opening of the branch throttle valve 44 in the third branch oil supply flow path 4 and lock it;

[0051] i. Open the branch switch valves 42 of the first and second branch oil supply paths 4, adjust the opening of the first throttle valve 22, so that the flow rate displayed by the flowmeter is equal to the sum of the flow rates of each bearing cavity measured in the above steps c, d, and e, and record the test data in this state.

[0052] Alternatively, if Figure 1 As shown, the oil supply system matching test equipment also includes a second regulating flow path 6 and a pressure regulating overflow flow path 7 with a pressure regulating valve 73. The oil inlet end and the oil outlet end of the second regulating flow path 6 are respectively connected to the oil outlet end of the oil supply boost temperature regulating flow path 1 and the oil outlet end of the first regulating flow path 2, and the oil inlet end and the oil outlet end of the pressure regulating overflow flow path 7 are respectively connected to the oil outlet end of the main oil supply flow path 3 and the first regulating flow path 2. A throttle valve is also provided in the second regulating flow path 6, and a switch valve is also provided in the pressure regulating overflow flow path 7, so that when the switch valve is opened, multiple throttle valves in the first regulating flow path 2, the main oil supply flow path 3, and the second regulating flow path 6 are adjusted, and then the oil supply system matching test with the pressure regulating valve 73 is carried out on the basis of the oil supply system matching test without the pressure regulating valve 73, so as to verify the matching of the oil supply system and the pressure regulating valve 73.

[0053] In this option, if Figure 1 As shown, the second regulating flow path 6 includes a third oil delivery pipe 61 for delivering oil, and a third throttle valve 62, a second pressure gauge 63 and a second throttle valve 64 which are sequentially arranged in the third oil delivery pipe 61 along the flow direction of the lubricating oil. The oil inlet end of the third oil delivery pipe 61 is connected to the oil outlet end of the first oil delivery pipe 12, and the oil outlet end of the third oil delivery pipe 61 is connected to the oil outlet end of the first regulating flow path 2.

[0054] Furthermore, if Figure 1 As shown, the pressure regulating overflow flow path 7 includes a fourth oil delivery pipe 71 for oil delivery, and a first switch valve 72 and a pressure regulating valve 73 sequentially arranged in the fourth oil delivery pipe 71 along the flow direction of the lubricating oil. The oil inlet end of the fourth oil delivery pipe 71 is connected to the main oil supply pipe 31 between the first flow meter 32 and the second flow meter 33, and the oil outlet end of the fourth oil delivery pipe 71 is connected to the oil outlet end of the first regulating flow path 2. The two pressure sensing ports for sensing pressure of the pressure regulating valve 73 are respectively connected to the main oil supply pipe 31 after the fourth throttle valve 34 and the third oil delivery pipe 61 between the third throttle valve 62 and the second throttle valve 64.

[0055] When the test equipment of the present invention is used to perform a matching test of an oil supply system with a pressure regulating valve, the pressure regulating valve 73 is connected on the basis of the matching test of the oil supply system without a pressure regulating valve, and the first switch valve 72 is opened at the same time, and the fourth throttle valve 34 is adjusted, so that under the set flow rate, the difference between the value P1 of the first pressure sensor 16 and the value P3 of the third pressure sensor 35 set behind the fourth throttle valve 34 is close to the target value, and the opening of the fourth throttle valve 34 is locked, thereby simulating the pressure loss of the engine lubricating oil system from the outlet of the lubricating oil pump to the inlet of the bearing cavity. These losses are usually caused by components such as oil filters, radiators and flow paths. By simulating this loss, the working pressure of the pressure regulating valve can be obtained more accurately. One of the pressure sources required to be felt, namely, the bearing cavity inlet pressure; and then jointly adjust the openings of the first throttle valve 22, the second throttle valve 64, and the third throttle valve 62, so that the value P2 of the second pressure gauge 63 is close to the target value, and at the same time, the first flow meter 32 displays that the flow rate reaches a given value, and records the test data under this state, thereby simulating another pressure source required to be felt by the pressure regulating valve, namely, the bearing cavity outlet pressure. The simulation of the two pressure sources required to be felt by the pressure regulating valve is realized through a simple throttle valve without adding corresponding pressure source simulation equipment, which usually includes another set of lubricating oil pumps and other equipment, so that the system is simpler and has lower cost while accurately simulating the working conditions of the pressure regulating valve. On the other hand, when the pressure regulating valve 73 is working, it generally senses the bearing cavity inlet pressure and the bearing cavity pressure to change its internal flow area, thereby adjusting the overflow flow and changing the bearing cavity pressure. In previous test equipment, these two pressure sources required for the pressure regulating valve to work are generally realized by adding additional lubricating oil pumps, valves and other equipment, which makes the system more complicated and costly. In the present invention, the excess oil supply flow of the lubricating oil pump, that is, the overflow flow, is utilized, and the throttle valve is reasonably configured to simulate the working pressure source of the pressure regulating valve, making the test equipment simpler and less costly.

[0056] Furthermore, if Figure 1 As shown, the oil supply system matching test equipment also includes an oil return flow path 8 for collecting and returning all the return oil in the test, and the oil return flow path 8 includes:

[0057] An oil collection tank 81 , an oil return pipe 82 whose oil inlet end is connected to the oil collection tank 81 , and an oil return pump 83 connected to the oil return pipe 82 .

[0058] The oil outlet end of the bearing cavity 5 of the branch oil supply flow path 4 is connected to the oil collection tank 81 .

[0059] The oil outlet end of the oil return pipe 82 is connected to the oil outlet end of the first regulating flow path 2 .

[0060] like Figure 1As shown, the flow process of the lubricating oil in the test equipment of the present invention is as follows: the booster pump 13 draws oil from the lubricating oil tank 11, the lubricating oil is filtered through the lubricating oil filter 14 after being pressurized, and then heated by the heater 15, and then divided into multiple paths: one path passes through the first throttle valve 22 and enters the radiator 23; the second path passes through the third throttle valve 62 and the second throttle valve 64 in sequence and then enters the radiator 23, and a pipeline can be connected between the third throttle valve 62 and the second throttle valve 64 to lead the pressure to the pressure regulating valve 73 as the back pressure of the bearing cavity; the third path flows through the first flow meter 32, the second flow meter 33, and the fourth throttle valve 34, and then is supplied to each bearing cavity, and the lubricating oil pipeline can be connected at the outlet of the fourth throttle valve 34 to lead the pressure to the pressure regulating valve 73 to be used as the oil supply pressure In the simulation, there is an oil interface between the first flow meter 32 and the second flow meter 33 to lead the oil to the pressure regulating valve 73. A first switch valve 72 is set on the branch to cut off the branch when the pressure regulating valve test is not performed. The oil overflow formed after the pressure regulating valve flows back to the radiator 23; the third lubricating oil is distributed to each bearing cavity oil supply branch, each branch is provided with a switch valve and a throttle valve, and pressure measuring points are set before and after the throttle valve. After the lubricating oil passes through each bearing cavity test piece, it flows into the oil collection pool 81. The lubricating oil in the oil collection pool 81 is pumped back by the return oil pump 83, and after merging with the first route, the second route and the pressure regulating valve overflow in front of the radiator 23, it enters the radiator 23 to adjust the temperature, and then returns to the lubricating oil tank 11.

[0061] Specifically, Figure 1 As shown, when the number of branch oil supply flow paths 4 is three arranged in parallel, when the test equipment of the present invention is used to perform the oil supply system matching test with the pressure regulating valve, the specific operation is as follows:

[0062] a. Build the test equipment according to the schematic diagram, connect to the three bearing chambers, and all the switch valves and throttle valves in the equipment are in the closed state;

[0063] f. Open the branch switch valve 42 of the first branch oil supply flow path 4, adjust the opening of the branch throttle valve 44, and adjust the opening of the first throttle valve 22 at the same time, so that the value P5 of the second pressure measuring device 45 of the branch before the bearing cavity reaches the set value, and at the same time, the difference between the values ​​P4 and P5 of the first pressure measuring device 43 of the branch is close to the set value of the bearing cavity pressure, record the test data in this state, keep the opening of the branch throttle valve 44 in the first branch oil supply flow path 4 and lock it;

[0064] g. Close the branch switch valve 42 in the first branch oil supply flow path 4, and open the branch switch valve 42 in the second branch oil supply flow path 4, adjust the opening of the branch throttle valve 44, and adjust the opening of the first throttle valve 22, so that the value P5 of the second pressure measuring device 45 of the branch before the bearing cavity reaches the set value, and at the same time, the difference between the values ​​P4 and P5 of the first pressure measuring device 43 of the branch is close to the set value of the bearing cavity pressure, record the test data in this state, keep the opening of the branch throttle valve 44 in the second branch oil supply flow path 4 and lock it;

[0065] h. Close the branch switch valve 42 in the second branch oil supply flow path 4, and open the branch switch valve 42 in the third branch oil supply flow path 4, adjust the opening of the branch throttle valve 44, and adjust the opening of the first throttle valve 22, so that the value P5 of the second pressure measuring device 45 of the branch before the bearing cavity reaches the set value, and at the same time, the difference between the values ​​P4 and P5 of the first pressure measuring device 43 of the branch is close to the set value of the bearing cavity pressure, record the test data in this state, keep the opening of the branch throttle valve 44 in the third branch oil supply flow path 4 and lock it;

[0066] i. Open the branch switch valves 42 of the first and second branch oil supply paths 4, adjust the opening of the first throttle valve 22, so that the flow rate displayed by the flow meter is equal to the sum of the flow rates of the bearing chambers measured in the above steps c, d, and e, and record the test data in this state;

[0067] j. Connect the pressure regulating valve 73, open the first switch valve 72, and adjust the fourth throttle valve 34 so that the difference between the value P1 of the first pressure gauge 16 and the value P3 of the third pressure gauge 35 is close to the target value under the set flow rate, and the opening of the fourth throttle valve 34 is locked; jointly adjust the openings of the first throttle valve 22, the second throttle valve 64 and the third throttle valve 62 so that the value P2 of the second pressure gauge 63 is close to the target value, and at the same time, the first flow meter 32 displays that the flow rate reaches a given value, and record the test data in this state (referring to the pressure of all pressure measuring points set in the test flow path, the lubricating oil flow rate in the test flow path, the lubricating oil temperature, etc.).

[0068] Alternatively, if Figure 1 As shown, the oil supply system matching test equipment also includes a pressure regulating characteristic verification flow path 9 for performing a pressure regulating characteristic test of a separate pressure regulating valve 73, and the pressure regulating characteristic verification flow path 9 includes: a fifth oil pipeline 91 for oil transportation, a second switch valve 92 and a fifth throttle valve 93 sequentially arranged in the pipeline of the fifth oil pipeline 91. The oil inlet end of the fifth oil pipeline 91 is connected to the oil outlet end of the main oil supply flow path 3, and the oil outlet end of the fifth oil pipeline 91 is connected to the oil collection tank 81. Through the above operation, it is possible to simulate the oil supply characteristics of the engine through the fifth throttle valve 93 without a bearing cavity test piece, and to simulate the working condition of the pressure regulating valve. This configuration increases the test requirements that the system can meet, and a set of equipment can take into account multiple tests, which can significantly reduce costs.

[0069] Specifically, Figure 1 As shown, when the number of branch oil supply channels 4 is three arranged in parallel, when the test equipment of the present invention is used to perform a pressure regulating valve characteristic test alone, the specific operation is as follows:

[0070] a. Build the test equipment according to the schematic diagram, connect to the three bearing chambers, and all the switch valves and throttle valves in the equipment are in the closed state;

[0071] k. If only the pressure regulating valve characteristic test is carried out separately and there is no bearing cavity test piece, close the switch valves in each oil supply flow path 4 and open the second switch valve 92 at the same time. The rest is the same as step j in the above-mentioned oil supply system matching test with a pressure regulating valve.

[0072] In the oil supply system matching test equipment of the present invention, by using switch valves and throttle valves driven by electric or other means and converting each operation step into control logic, automatic control can be quickly realized, thereby improving the test efficiency. At the same time, multiple tests can be taken into account as needed, thereby increasing the test scope and significantly reducing the test cost.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fuel supply system matching test equipment, characterized in that: include: An oil supply, pressurizing and temperature regulating flow path (1) for supplying lubricating oil and pressurizing and heating the lubricating oil, a first regulating flow path (2), a main oil supply flow path (3), and a plurality of branch oil supply flow paths (4) each having oil outlet ends connected to a bearing cavity (5); The oil inlet ends of the first regulating flow path (2) and the main oil supply flow path (3) are respectively connected to the oil outlet end of the oil supply pressurizing and temperature regulating flow path (1); the oil outlet end of the first regulating flow path (2) is connected to the oil return end of the oil supply pressurizing and temperature regulating flow path (1); and the oil outlet end of the main oil supply flow path (3) is respectively connected to the oil inlet end of each branch oil supply flow path (4); A throttle valve is provided in each of the first regulating flow path (2) and each branch oil supply flow path (4), a flow meter is provided in the main oil supply flow path (3), and each branch oil supply flow path (4) is also provided with a switch valve with an opening and closing setting, so that when the switch valve and the throttle valve in the branch oil supply flow path (4) to be measured are fully opened, the switch valve in the first regulating flow path (2) is adjusted to perform a flow characteristic test of a single bearing cavity (5), so as to measure the flow of the bearing cavity (5) under different temperatures and pressures; When the switch valve in the branch oil supply flow path (4) to be measured is opened, a matching test of the oil supply system without the pressure regulating valve (73) is performed by adjusting the switch valve in the flow path and the switch valve in the first regulating flow path (2), so as to simulate the engine oil supply system when the valve is not connected and obtain the system oil supply characteristics under different temperature and pressure conditions; The oil supply system matching test equipment further comprises a second regulating flow path (6) and a pressure regulating overflow flow path (7) with a pressure regulating valve (73); the oil inlet end and the oil outlet end of the second regulating flow path (6) are respectively connected to the oil outlet end of the oil supply pressure-boosting and temperature-regulating flow path (1) and the oil outlet end of the first regulating flow path (2); the oil inlet end and the oil outlet end of the pressure regulating overflow flow path (7) are respectively connected to the oil outlet end of the main oil supply flow path (3) and the first regulating flow path (2); a throttle valve is further provided in the second regulating flow path (6), and a switch valve is further provided in the pressure regulating overflow flow path (7), so that when the switch valve is opened, a plurality of throttle valves in the first regulating flow path (2), the main oil supply flow path (3) and the second regulating flow path (6) are adjusted, and then the oil supply system matching test with the pressure regulating valve (73) is performed on the basis of the oil supply system matching test without the pressure regulating valve (73), so as to verify the matching of the oil supply system and the pressure regulating valve (73).

2. The oil supply system matching test equipment according to claim 1, characterized in that: The oil supply, boosting and temperature regulating flow path (1) comprises a lubricating oil tank (11), a first oil delivery pipe (12) whose oil inlet end is connected to the lubricating oil tank (11), and a boosting pump (13), a lubricating oil filter (14), a heater (15) and a first pressure measuring device (16) for measuring the pressure in the pipeline, which are sequentially arranged in the first oil delivery pipe (12) along the flow direction of the lubricating oil; The oil inlet end of the first regulating flow path (2) and the oil inlet end of the main oil supply flow path (3) are respectively connected to the oil outlet end of the first oil delivery pipe (12).

3. The oil supply system matching test equipment according to claim 2, characterized in that: The first regulating flow path (2) comprises a second oil delivery pipe (21) for delivering oil, and a first throttle valve (22) and a radiator (23) which are sequentially arranged in the second oil delivery pipe (21) along the flow direction of the lubricating oil; The oil inlet end of the second oil delivery pipe (21) is connected to the oil outlet end of the first oil delivery pipe (12), and the oil outlet end of the second oil delivery pipe (21) is connected to the lubricating oil tank (11).

4. The oil supply system matching test equipment according to claim 2, characterized in that: The main oil supply flow path (3) comprises a main oil supply pipe (31) for transporting oil, and a first flow meter (32), a second flow meter (33) and a fourth throttle valve (34) which are sequentially arranged in the main oil supply pipe (31) along the flow direction of the lubricating oil; The oil inlet end of the main oil supply pipe (31) is connected to the oil outlet end of the first oil delivery pipe (12), and the oil outlet end of the main oil supply pipe (31) is respectively connected to the oil inlet end of each branch oil supply flow path (4).

5. The oil supply system matching test equipment according to claim 4, characterized in that: A plurality of branch oil supply flow paths (4) are arranged in parallel in sequence, and each branch oil supply flow path (4) comprises a branch oil supply pipe (41) for transporting oil, and a branch switch valve (42), a branch first pressure measuring device (43), a branch throttle valve (44) and a branch second pressure measuring device (45) which are arranged in sequence in the branch oil supply pipe (41) along the flow direction of the lubricating oil; The oil inlet end of the branch oil supply pipe (41) is connected to the oil outlet end of the main oil supply pipe (31), and the oil outlet end of the branch oil supply pipe (41) is connected to the bearing cavity (5).

6. The oil supply system matching test equipment according to claim 4, characterized in that: The second regulating flow path (6) comprises a third oil delivery pipe (61) for delivering oil, and a third throttle valve (62), a second pressure measuring device (63) and a second throttle valve (64) which are sequentially arranged in the third oil delivery pipe (61) along the flow direction of the lubricating oil; The oil inlet end of the third oil delivery pipe (61) is connected to the oil outlet end of the first oil delivery pipe (12), and the oil outlet end of the third oil delivery pipe (61) is connected to the oil outlet end of the first regulating flow path (2).

7. The oil supply system matching test equipment according to claim 4, characterized in that: The pressure regulating overflow flow path (7) comprises a fourth oil delivery pipe (71) for delivering oil, and a first switch valve (72) and a pressure regulating valve (73) which are sequentially arranged in the fourth oil delivery pipe (71) along the flow direction of the lubricating oil; The oil inlet end of the fourth oil delivery pipe (71) is connected to the main oil supply pipe (31) between the first flow meter (32) and the second flow meter (33), and the oil outlet end of the fourth oil delivery pipe (71) is connected to the oil outlet end of the first regulating flow path (2); The two pressure sensing ports of the pressure regulating valve (73) for sensing pressure are respectively connected to the main oil supply pipe (31) after the fourth throttle valve (34) and the third oil delivery pipe (61) between the third throttle valve (62) and the second throttle valve (64).

8. The oil supply system matching test equipment according to claim 1, characterized in that: The oil supply system matching test equipment also includes an oil collection and return flow path (8) for collecting and returning all return oil in the test. The oil collection and return flow path (8) includes: An oil collection tank (81), an oil return pipe (82) whose oil inlet end is connected to the oil collection tank (81), and an oil return pump (83) connected to the oil return pipe (82); The oil outlet end of the bearing cavity (5) of the branch oil supply flow path (4) is connected to the oil collection tank (81); The oil outlet end of the oil return pipe (82) is connected to the oil outlet end of the first regulating flow path (2).

9. The oil supply system matching test equipment according to claim 8, characterized in that: The oil supply system matching test equipment also includes a pressure regulating characteristic verification flow path (9) for performing a pressure regulating characteristic test of a separate pressure regulating valve (73). The pressure regulating characteristic verification flow path (9) includes: A fifth oil delivery pipe (91) for delivering oil, a second switch valve (92) and a fifth throttle valve (93) sequentially arranged in the pipeline of the fifth oil delivery pipe (91); The oil inlet end of the fifth oil delivery pipe (91) is connected to the oil outlet end of the main oil supply flow path (3), and the oil outlet end of the fifth oil delivery pipe (91) is connected to the oil collection tank (81).

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