Self-pressurized fuel tank test system

Abstract

The present invention provides a self-pressurizing oil tank test system, which belongs to the field of oil tank test technology, and includes a hydraulic workstation; the oil outlet of the hydraulic workstation is connected to a three-way control valve 0, and the two outlets of the three-way control valve 0 are respectively connected to a pressure detection oil circuit and a high-pressure seal detection oil circuit, and the outlets of the pressure detection oil circuit are respectively connected to a high-pressure branch and a low-pressure branch, and the starting pressure of the high-pressure chamber is detected: the pressure in the high-pressure chamber and the pressure in the low-pressure chamber are adjusted to preset values, the pressure in the high-pressure chamber is increased, and the high-pressure chamber pressure when the oil level gauge starts to move is recorded; the starting pressure of the low-pressure chamber is detected: the pressure in the high-pressure chamber and the pressure in the low-pressure chamber are adjusted to preset values, the pressure in the low-pressure chamber is increased, and the low-pressure chamber pressure when the oil level gauge starts to move is detected. The advantages are: detecting the starting working pressure can evaluate the performance of the self-pressurizing oil tank, ensure normal operation within the design parameter range, and help discover potential faults.

Description

Technical Field

[0001] The invention belongs to the technical field of oil tank testing, and in particular relates to a self-pressurizing oil tank testing system. Background Art

[0002] The self-pressurizing oil tank is mainly used in closed hydraulic systems. The self-pressurizing oil tank is an oil storage device for the hydraulic energy system. At the same time, it pressurizes the pump suction port and compensates for the change in oil volume during storage during operation. It is mainly composed of an oil tank shell, a booster spring, a large piston, a sealing ring, and a small piston. When the hydraulic pump is started, the self-pressurizing oil tank provides the initial boost pressure for the hydraulic pump inlet, and at the same time feeds back the hydraulic pump outlet pressure to the hydraulic pump inlet in a certain proportion, so that the hydraulic pump inlet pressure increases. When the system is working, the self-pressurizing oil tank can supplement a certain flow rate to reduce pressure fluctuations. The self-pressurizing oil tank can also compensate for changes in the system oil volume caused by temperature changes, avoid the oil circuit pressure being in an extremely low state during the storage process of the system, and prevent leakage and pipeline damage. During operation, the oil tank is unlocked, and the large piston is pushed to move under the action of the spring to pressurize the hydraulic system;

[0003] In order to test the indicators of the self-pressurizing fuel tank and determine whether the performance of the self-pressurizing fuel tank meets the requirements, it is necessary to test the performance of various indicators of the self-pressurizing fuel tank. Summary of the invention

[0004] The technical problem to be solved by the present invention is to detect the performance of various indicators of a self-pressurizing oil tank. In view of the shortcomings of the prior art, a self-pressurizing oil tank testing system capable of testing the indicators of a self-pressurizing oil tank is provided. In order to solve the above technical problems, the technical scheme adopted by the present invention is: comprising a hydraulic workstation, a test bench, a hydraulic pump and a mounting bench, the hydraulic workstation is installed inside the test bench, the hydraulic pump and the mounting bench are fixedly installed on the test bench, and the self-pressurizing oil tank is installed on the mounting bench; the oil outlet of the hydraulic workstation is connected to a three-way control valve O, the two outlets of the three-way control valve O are respectively connected to a pressure detection oil circuit and a high-pressure sealing detection oil circuit, the outlet of the pressure detection oil circuit is respectively connected to a high-pressure branch and a low-pressure branch, and the high-pressure chamber of the self-pressurizing oil tank is connected to There is a three-way control valve ten, and the outlet of the high-pressure sealing detection oil circuit is connected to the three-way control valve ten; the high-pressure branch is used to connect to the three-way control valve ten, and the low-pressure branch is used to communicate with the low-pressure chamber of the self-pressurizing oil tank, the pressure detection oil circuit is connected to the hydraulic pump, and the outlets of the high-pressure branch and the low-pressure branch are both connected to the return oil pipeline of the hydraulic workstation; the test system is used to detect the starting pressure of the high-pressure chamber of the self-pressurizing oil tank: adjust the pressure in the high-pressure chamber and the pressure in the low-pressure chamber to preset values, increase the pressure in the high-pressure chamber, and record the high-pressure chamber pressure when the oil level dipstick starts to move; the test system is also used to detect the starting pressure of the low-pressure chamber of the self-pressurizing oil tank: adjust the pressure in the high-pressure chamber and the pressure in the low-pressure chamber to preset values, increase the pressure in the low-pressure chamber, and detect the low-pressure chamber pressure when the oil level dipstick starts to move

[0005] Furthermore, the pressure detection oil circuit is installed with a straight-through control valve 1, a straight-through control valve 3, a pressure gauge 5, a pressure regulating valve, a pressure gauge 4, a straight-through control valve 4 and a first filter, and one end of the straight-through control valve 4 is connected to a hydraulic pump; the low-pressure branch is installed with a straight-through control valve 5 and a straight-through control valve 7, the low-pressure branch is installed with a straight-through control valve 9, and one side of the straight-through control valve 9 is installed with a pressure gauge 3, the low-pressure chamber is arranged between the straight-through control valve 5 and the straight-through control valve 7, and the low-pressure branch is connected to the low-pressure chamber through the outlet of the straight-through control valve 5; the high-pressure branch is installed with a straight-through control valve 6 and a straight-through control valve 8, the high-pressure branch is installed with a pressure gauge 1, and the three-way control valve 10 is arranged between the straight-through control valve 6 and the straight-through control valve 8.

[0006] Furthermore, the outlet of the high-pressure sealing detection oil circuit is connected to the high-pressure chamber through the three-way control valve ten, and the high-pressure sealing detection oil circuit is installed with a straight-through control valve two, a pointer pressure gauge six and a second filter.

[0007] Furthermore, the hydraulic pump includes an oil storage cylinder, on which a hand pressure handle and a fine-tuning handle are installed. The oil storage cylinder controls the oil pressure through the hand pressure handle and the fine-tuning handle. The oil storage cylinder is provided with a pipeline interface and a pressure gauge interface. The oil storage cylinder is connected to the pressure detection oil circuit through the pipeline interface, and the oil storage cylinder is connected to pressure gauge 8 through the pressure gauge interface.

[0008] Further, the mounting platform is provided with a support block and a support block, the self-pressurizing oil tank is supported by the support block and the support block, a pressure ring is installed on the support block, and the self-pressurizing oil tank is installed on the mounting platform through the pressure ring and the support block;

[0009] A low-pressure chamber oil pipe and a high-pressure chamber oil pipe are installed on the self-pressurizing oil tank. The self-pressurizing oil tank is used to communicate with the low-pressure branch through the low-pressure chamber oil pipe and to communicate with the high-pressure branch through the high-pressure chamber oil pipe. A dial indicator is provided on one side of the support block.

[0010] Furthermore, the test system is also used to detect the sealing performance of the low-pressure chamber of the self-pressurized oil tank: the hydraulic workstation injects oil and pressurizes the low-pressure chamber through the pressure detection oil circuit and the low-pressure branch, controls the closure of the pressure detection oil circuit, adjusts the pressure of the low-pressure chamber to the set value and maintains it, and checks the sealing of the low-pressure chamber.

[0011] Furthermore, the test system is also used to detect the elastic force of the small spring of the self-pressurized oil tank to overcome the resistance: fill the low-pressure chamber with oil, control the pressure detection oil circuit to be closed, release the pressure detection oil circuit to allow the small spring to restore its deformation and push the piston to move in the low-pressure chamber, record the position of the oil level dipstick before and after the piston moves, and obtain the moving distance of the small spring of the self-pressurized oil tank to overcome the resistance.

[0012] Furthermore, the test system is also used to detect the self-boosting pressure of the low-pressure chamber of the self-boosting oil tank: fill oil into the low-pressure chamber and seal it, record the position of the oil level dipstick, control the large spring of the self-boosting oil tank to act on the large piston, compare the low-pressure chamber pressure values ​​before and after the large spring acts on the large piston, and detect the self-boosting pressure of the low-pressure chamber of the self-boosting oil tank.

[0013] Furthermore, the method for the test system to detect the starting pressure of the high-pressure chamber of the self-pressurizing oil tank also includes: filling the high-pressure chamber with oil to make the small spring of the self-pressurizing oil tank close to the natural state, releasing the pressure of the low-pressure chamber and the high-pressure chamber to make the small spring in the natural state, using a hydraulic pump to pressurize the high-pressure chamber through the pressure detection oil circuit and the high-pressure branch, and obtaining the high-pressure starting pressure by obtaining the pressure of the high-pressure chamber when the oil level dipstick starts to move;

[0014] The method for the test system to detect the starting pressure of the low-pressure chamber of the self-pressurized oil tank also includes: injecting oil into the high-pressure chamber and pressurizing it through the pressure detection oil circuit and the high-pressure branch, relieving the pressure in the high-pressure chamber to put the small spring in a natural state, using a hydraulic pump to inject oil into the low-pressure chamber and pressurize it through the pressure detection oil circuit and the low-pressure branch, and obtaining the low-pressure starting pressure by obtaining the pressure of the low-pressure chamber when the oil level dipstick starts to move.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. After the pressure of the high-pressure chamber and the low-pressure chamber of the self-pressurizing oil tank is returned to zero, pressure is introduced into the high-pressure chamber and the low-pressure chamber respectively, and the pressure of the high-pressure chamber and the low-pressure chamber when the oil level dipstick starts to move is recorded to obtain the starting pressure of the high-pressure chamber and the low-pressure chamber of the self-pressurizing oil tank. By detecting the starting working pressure, the performance of the self-pressurizing oil tank can be evaluated to ensure normal operation within the design parameter range, and help discover potential faults or abnormal conditions.

[0017] 2. After filling the low-pressure chamber with oil, the large spring of the self-pressurizing oil tank acts on the low-pressure chamber pressure value before and after the large piston to obtain the self-pressurizing pressure of the large spring, and determine whether the pressure meets the set standard.

[0018] 3. By respectively introducing pressure into the high-pressure chamber and the low-pressure chamber and maintaining the pressure, the sealing performance indicators of the high-pressure chamber and the low-pressure chamber can be tested to avoid affecting the test results of the high-pressure starting pressure and the low-pressure starting pressure due to the sealing performance not meeting the standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0020] Figure 1 : A schematic diagram of the structure of the self-pressurizing oil tank in Embodiment 1 of the present invention;

[0021] Figure 2 : Hydraulic principle diagram of the self-pressurizing oil tank test in Example 1 of the present invention;

[0022] Figure 3 : Distribution diagram of the pressure detection oil circuit and the high-pressure seal detection oil circuit as well as the high-pressure branch and the low-pressure branch in Example 1 of the present invention;

[0023] Figure 4 : A schematic diagram of the structure of the self-pressurizing oil tank test bench in Example 1 of the present invention;

[0024] Figure 5 : A schematic diagram of the structure of a hydraulic pump in Embodiment 2 of the present invention;

[0025] Figure 6 : Hydraulic principle diagram of the hydraulic pump in embodiment 2 of the present invention;

[0026] Figure 7: Schematic diagram of the installation of the self-pressurizing oil tank in Example 2 of the present invention.

[0027] Among them, E1, oil storage cylinder; E2, hand pressure handle; E3, fine adjustment handle; E4, pipeline interface; E5, pressure gauge interface; E6, pressure regulating valve; E7, dial indicator; K0, three-way control valve 0; K1, straight-through control valve 1; K2, straight-through control valve 2; K3, straight-through control valve 3; K4, straight-through control valve 4; K5, straight-through control valve 5; K6, straight-through control valve 6; K7, straight-through control valve 7; K8, straight-through control valve 8; K9, straight-through control valve 9; K10, three-way control valve 10; Q1, pressure detection oil circuit; Q2, high-pressure branch; Q3, low-pressure branch; W1, high Pressure seal detection oil circuit; Y1, hydraulic workstation; Y2, test bench; Y3, hydraulic pump; Y4, installation table; Y5, return oil pipeline; Y6, first filter; Y7, second filter; Z1, self-pressurized oil tank; Z2, high-pressure chamber; Z3, low-pressure chamber; Z4, small piston; Z5, large piston; Z6, small spring; Z7, large spring; Z8, spring pressure plate; Z9, fixing pin; Z10, oil level dipstick; M1, pressure gauge one; M2, pressure gauge two; M3, pressure gauge three; M4, pressure gauge four; M5, pressure gauge five; M6, pointer pressure gauge six; M7, return oil pressure gauge seven. DETAILED DESCRIPTION

[0028] In order to better understand the present invention, the content of the present invention is further clearly described below in conjunction with the embodiments and the accompanying drawings, but the protection content of the present invention is not limited to the following embodiments. In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details.

[0029] like Figure 1 As shown, the self-pressurizing oil tank Z1 includes a high-pressure chamber Z2 and a low-pressure chamber Z3, a small piston Z4 is arranged inside the high-pressure chamber Z2, a large piston Z5 is arranged inside the low-pressure chamber Z3, a small spring Z6 is arranged inside the self-pressurizing oil tank Z1, one end of the small spring Z6 is connected to the large piston Z5, a large spring Z7 is arranged inside the self-pressurizing oil tank Z1, one end of the large spring Z7 is connected to a spring pressure plate Z8, a fixing pin Z9 for fixing the spring pressure plate Z8 is arranged on the self-pressurizing oil tank Z1, the spring pressure plate Z8 is used to abut against the large piston Z5, an oil level dipstick Z10 is connected to one side of the small piston Z4, and one end of the oil level dipstick Z10 passes through the self-pressurizing oil tank Z1;

[0030] Example 1: See Figure 2-7, a self-pressurizing oil tank test system of this embodiment, which includes a hydraulic workstation Y1, a test bench Y2, a hydraulic pump Y3 and a mounting bench Y4, wherein the hydraulic workstation Y1 is installed inside the test bench Y2, and the hydraulic pump Y3 and the mounting bench Y4 are fixedly installed on the test bench Y2;

[0031] The oil outlet of the hydraulic workstation Y1 is connected to a three-way control valve OK0, and the two outlets of the three-way control valve OK0 are respectively connected to a pressure detection oil circuit Q1 and a high-pressure seal detection oil circuit W1, and the outlet of the pressure detection oil circuit Q1 is respectively connected to a high-pressure branch Q2 and a low-pressure branch Q3, and the high-pressure chamber Z2 of the self-pressurizing oil tank is connected to a three-way control valve + K10, and the outlet of the high-pressure seal detection oil circuit W1 is connected to the three-way control valve + K10;

[0032] The high-pressure branch Q2 is used to connect to the three-way control valve + K10, the low-pressure branch Q3 is used to communicate with the low-pressure chamber Z3 of the self-pressurizing oil tank, the pressure detection oil circuit Q1 is connected to the hydraulic pump Y3, and the outlets of the high-pressure branch Q2 and the low-pressure branch Q3 are both connected to the return oil pipeline Y5 of the hydraulic workstation Y1;

[0033] The test system is used to detect the starting pressure of the high-pressure chamber Z2 of the self-pressurized oil tank: adjust the pressure in the high-pressure chamber Z2 and the pressure in the low-pressure chamber Z3 to a preset value, the preset value is 0, increase the pressure of the high-pressure chamber Z2, and record the pressure of the high-pressure chamber Z2 when the oil level dipstick Z10 starts to move;

[0034] The test system is also used to detect the starting pressure of the low-pressure chamber Z3 of the self-pressurized oil tank: adjust the pressure in the high-pressure chamber Z2 and the pressure in the low-pressure chamber Z3 to preset values, the preset value is 0, increase the pressure in the low-pressure chamber Z3, and detect the pressure in the low-pressure chamber Z3 when the oil level dipstick Z10 starts to move.

[0035] See also Figure 2-3 The pressure detection oil circuit Q1 is equipped with a through control valve K1, a through control valve K3, a pressure gauge M5, a pressure regulating valve E6, a pressure gauge M4, a through control valve K4 and a first filter Y6. One end of the through control valve K4 is connected to a hydraulic pump Y3.

[0036] The low-pressure branch Q3 is equipped with a through control valve five K5 and a through control valve seven K7, the low-pressure branch Q3 is equipped with a through control valve nine K9, a pressure gauge three M3 is installed on one side of the through control valve nine K9, the low-pressure chamber Z3 is arranged between the through control valve five K5 and the through control valve seven K7, and the low-pressure branch Q3 is connected with the low-pressure chamber Z3 through the outlet of the through control valve five K5;

[0037] The high-pressure branch Q2 is provided with a straight-through control valve six K6 and a straight-through control valve eight K8, the high-pressure branch Q2 is provided with a pressure gauge one M1, and the three-way control valve ten K10 is arranged between the straight-through control valve six K6 and the straight-through control valve eight K8.

[0038] See also Figure 2-3 The outlet of the high-pressure sealing detection oil circuit W1 is connected to the high-pressure chamber Z2 through the three-way control valve K10, and the high-pressure sealing detection oil circuit W1 is installed with a straight-through control valve K2, a pointer pressure gauge M6 and a second filter Y7.

[0039] See also Figure 2-3, pressure gauge 1 M1, pressure gauge 2 M2, pressure gauge 3 M3 are 0.1-level high-precision digital pressure gauges, and M8 is 0.2-level high-precision digital pressure gauge. Pressure gauge 4 M4, pressure gauge 5 M5, pointer pressure gauge 6 M6 are 0.4-level pointer pressure gauges, and return oil pressure gauge 7 M7 is a 1.6-level return oil pointer pressure gauge. Hydraulic workstation Y1 is an open hydraulic system. The plunger pump of the hydraulic workstation is connected to the left side of the three-way control valve 0K0 through a quick-change joint (input) hose, and the right side of the three-way control valve 0K0 is connected to the straight-through control valve 1 K1 through a stainless steel pipe. The outlet of the straight-through control valve 1 K1 is connected to the inlet of the pressure regulating valve E6 (pressure reducing valve) through a stainless steel pipe. A three-way joint is set between the outlet of the straight-through control valve 1 K1 and the inlet of the pressure regulating valve E6 (pressure reducing valve), and the other end is connected to the pressure gauge 5 M5 pressure gauge through a pressure measuring hose. The output port of the pressure regulating valve E6 is connected to the straight-through control valve K3 and the pressure gauge M4 through a stainless steel pipe and a three-way joint. The outlet of the straight-through control valve K3 is connected to the throttle valve E8 through a stainless steel pipe, and the outlet of the throttle valve E8 is connected to the straight-through control valve K4 and the filter through a stainless steel pipe and a three-way joint; the straight-through control valve K4 is connected to the hydraulic pump Y3 through a steel pipe. A pressure gauge M8 is installed on the hydraulic pump Y3. The hydraulic pump Y3 is a high-precision manual hydraulic pump with a spiral fine-tuning mechanism. The outlet of the filter is connected to the through control valve 5 K5, through control valve 6 K6 through stainless steel pipe and three-way joint, wherein the outlet of the through control valve 5 K5 is connected to the through control valve 7 K7, through control valve 9 K9 and the low-pressure chamber Z3 of the self-pressurizing oil tank Z1 through stainless steel pipe and three-way joint, the other side of the through control valve 9 K9 is connected to the pressure gauge 3 M3 digital pressure gauge, and the other end of the through control valve 6 K6 is connected to the pressure gauge 1 M1, through control valve 8 K8 and three-way control valve 10 K10 through a three-way joint. The three-way control valve 10 K10 is connected to the high-pressure chamber Z2 of the self-pressurizing oil tank Z1, through control valve 8 K8 and through control valve 2 K2 respectively, and the through control valve 2 K2 is connected to the three-way control valve 0 K0 through a stainless steel pipe. The straight-through control valve 7 K7 and the straight-through control valve 8 K8 are connected to the quick-change joint (output) through a three-way joint stainless steel pipe and a hose. The straight-through control valve 7 K7 and the straight-through control valve 8 K8 and the quick-change joint (output) are connected to the return oil pressure gauge 7 M7 through a pressure measuring hose;

[0040] See also Figure 2-3The test system is also used to detect the sealing performance of the low-pressure chamber Z3 of the self-boosting oil tank: before detecting the starting pressure of the low-pressure chamber Z3 of the self-boosting oil tank, open the hydraulic workstation Y1, close the straight-through control valve K1, open the straight-through control valve K2, rotate the three-way control valve OK0, the three-way control valve K10, and close the straight-through control valve K7; the hydraulic workstation Y1 injects oil and pressurizes the low-pressure chamber Z3 through the pressure detection oil circuit Q1 and the low-pressure branch Q3, adjusts the pressure regulating switch to raise the pressure gauge M2 to P2MPa, closes the straight-through control valve K3, opens the straight-through control valve K4, controls the pressure detection oil circuit Q1 to be closed, adjusts the handle of the hydraulic pump Y3 to raise the pressure gauge M2 to P3MPa, and checks after 5 minutes that there is no leakage at each seal and the pressure of the pressure gauge M2 should not drop.

[0041] See also Figure 2-3 The test system is also used to detect the elastic force of the small spring Z6 of the self-pressurized oil tank to overcome the resistance: after the low-pressure sealing test (the spring pressure plate Z8 is positioned by the limit pin Z9 at this time, so that the large spring Z7 is pressed by the spring pressure plate Z8 and does not act on the large piston Z5), the low-pressure chamber Z3 is filled with oil to make the small spring Z6 in a state of compression to the limit, the straight-through control valve four K4 is closed, the pressure detection oil circuit Q1 is controlled to be closed, the oil level dipstick Z10 is installed, the oil level dipstick Z10 scale is checked, and the scale value L1 is recorded; the straight-through control valve seven K7 is opened, the pressure detection oil circuit Q1 is released from the closure, the small spring Z6 returns to the natural state and pushes the large piston Z5 to discharge the oil from the low-pressure chamber Z3, and the stopwatch is used for timing. After 3 minutes, the oil level dipstick Z10 scale is checked again, and the scale value L2 is recorded to obtain the moving distance of the small spring Z6 of the self-pressurized oil tank to overcome the resistance.

[0042] See also Figure 2-3The test system is also used to detect the self-boosting pressure of the low-pressure chamber Z3 of the self-boosting oil tank: after detecting the starting pressure of the low-pressure chamber Z3 of the self-boosting oil tank, when the pointer of the pressure gauge three M3 returns to zero, close the straight-through control valve six K6, the straight-through control valve seven K7, and the straight-through control valve nine K9, and open the straight-through control valve eight K8. Open the hydraulic workstation Y1 and the straight-through control valve five K5, adjust the switch of the pressure regulating valve E6 to inject oil into the low-pressure chamber Z3 of the self-boosting oil tank (the spring pressure plate Z8 is positioned by the limit pin Z9 at this time, so that the large spring Z7 is pressed by the spring pressure plate Z8 and does not act on the large piston Z5), and observe the oil level dipstick Z10 at the same time. When the measuring rod extends L4mm, the small spring Z6 is in a natural state, close the straight-through control valve five K5, adjust the switch of the pressure regulating valve E6 to reduce the pressure gauge four M4 to 0, close the hydraulic workstation Y1, and close the straight-through control valve. Control valve three K3, straight-through control valve four K4, keep the low-pressure chamber Z3 closed, open the straight-through control valve nine K9, quickly pull out the limit pin Z9 of the self-pressurizing oil tank Z1, when you hear the unhooking sound (the large and small springs Z6 act on the large piston Z5 at the same time), observe the pressure value of pressure gauge three M3, and make a record. This pressure value is the self-pressurizing pressure, which should not be less than P8Mpa. Compare the pressure value of the low-pressure chamber Z3 before and after the large spring Z7 acts on the large piston Z5, and detect the self-pressurizing pressure of the low-pressure chamber Z3 of the self-pressurizing oil tank.

[0043] See also Figure 2-3The method for the test system to detect the starting pressure of the high-pressure chamber Z2 of the self-boosting oil tank also includes: rotating the three-way control valve OK0 to connect the hydraulic oil input end with the pressure regulating valve E6, opening the straight-through control valve K1 and the straight-through control valve K3, closing the straight-through control valve K4, adjusting the switch of the pressure regulating valve E6 to increase the pressure of the pressure gauge M4 to P4Mpa; closing the straight-through control valve K8 and the straight-through control valve K5, opening the straight-through control valve K7, and opening the straight-through control valve K6 (at this time, the three-way control valve K10 is connected with the straight-through control valve K6), when the oil level gauge Z10 scale rises to L3mm, filling the high-pressure chamber Z2 with oil, and at the same time making the small spring Z6 of the self-boosting oil tank close to the natural state; adjusting the switch of the pressure regulating valve E6 to reduce the pressure of the pressure gauge M4 to 0, and then closing the hydraulic workstation Y1, Make the output pressure of the hydraulic station 0; close the through control valve 3 K3, through control valve 5 K5, through control valve 6 K6, open through control valve 8 K8 and through control valve 7 K7, release the rubber ring resistance, make the small spring Z6 in a natural state, and close the through control valve 8 K8 after the scale of the pressure gauge 1 M1 returns to zero, so that the pressure of the low-pressure oil chamber and the high-pressure oil chamber return to zero at the same time; put the measuring head of the dial gauge E7 on the outer end face of the large end face of the oil level dipstick Z10, and return the scale of the dial gauge E7 to zero; open the through control valve 4 K4, slowly open the through control valve 6 K6, turn the fine adjustment handle E3 of the hydraulic pump Y3, so that M1 gradually and slowly increases the pressure, and carefully observe the dial gauge E7. When the pointer of the dial gauge E7 moves, immediately close the through control valve 6 K6, and at the same time determine the pressure indicated by the pointer of M1 and make a record. This pressure is the high-pressure starting pressure P5.

[0044] The method for the test system to detect the starting pressure of the low-pressure chamber Z3 of the self-boosting oil tank also includes: opening the hydraulic workstation Y1, opening the straight-through control valve six K6 and the straight-through control valve seven K7, closing the straight-through control valve five K5 and the straight-through control valve eight K8 (at this time, the straight-through control valve six K6 is connected to the three-way control valve ten K10), adjusting the switch of the pressure regulating valve E6, filling the high-pressure chamber Z2 with oil through the pressure detection oil circuit Q1 and the high-pressure branch Q2, closing the straight-through control valve six K6, and adjusting the switch of the pressure regulating valve E6 to increase the pressure When the pressure of gauge 4 M4 drops to P6MPa, close the hydraulic workstation Y1; open the through control valve 8 K8 and through control valve 9 K9 in turn to release the pressure of high-pressure chamber Z2 and put the small spring Z6 in a natural state; close the through control valve 3 K3 and through control valve 7 K7, open the through control valve 5 K5, open the through control valve 4 K4, connect and seal the hydraulic pump Y3 with the low-pressure branch Q3, place the measuring head of dial gauge E7 on the outer end face of the large end face of the oil level gauge Z10, and return the scale of dial gauge E7 to zero. Gently press the hydraulic pump Y3 by hand and press the handle E2, inject oil and pressurize the low-pressure chamber Z3 through the pressure detection oil circuit Q1 and the low-pressure branch Q3, so that the pressure of pressure gauge 3 M3 gradually increases, and observe the dial gauge E7 carefully at the same time. When the pointer of dial gauge E7 moves, immediately close the through control valve 5 K5, and determine the pressure indicated by the pointer of pressure gauge 3 M3, and make a record. This pressure is the low-pressure starting pressure P7.

[0045] See also Figure 2-3 The test system is also used to detect the sealing performance of the high-pressure chamber Z2 of the self-boosting oil tank: open the hydraulic workstation Y1, close the straight-through control valve K1, open the straight-through control valve K2, rotate the three-way control valve 0K0 and the three-way control valve 10K10, start the hydraulic workstation Y1, and make the pressure of the pointer pressure gauge 6M6 rise to P1MPa and maintain it for 5 minutes. Check the small piston Z4 and each plug of the self-boosting oil tank Z1, and the sealing part shall not leak oil.

[0046] Beneficial Effects

[0047] 1. By respectively introducing pressure into the high-pressure chamber Z2 and the low-pressure chamber Z3 and maintaining the pressure, the sealing performance indicators of the high-pressure chamber Z2 and the low-pressure chamber Z3 can be tested to avoid affecting the test results of the high-pressure starting pressure and the low-pressure starting pressure due to the sealing performance not meeting the standards.

[0048] 2. After the pressure of the high-pressure chamber Z2 and the low-pressure chamber Z3 of the self-pressurizing oil tank is returned to zero, the pressure is respectively introduced into the high-pressure chamber Z2 and the low-pressure chamber Z3, and the pressure of the high-pressure chamber Z2 and the low-pressure chamber Z3 when the oil level dipstick Z10 starts to move is recorded to obtain the starting pressure of the high-pressure chamber Z2 and the low-pressure chamber Z3 of the self-pressurizing oil tank Z1. By detecting the starting working pressure, the performance of the self-pressurizing oil tank Z1 can be evaluated to ensure that it works normally within the design parameter range. Detecting the starting pressure can help discover potential faults or abnormal conditions.

[0049] 3. After filling the low-pressure chamber Z3 with oil, the large spring Z7 of the self-pressurizing oil tank Z1 acts on the pressure value of the low-pressure chamber Z3 before and after the large piston Z5 to obtain the self-pressurizing pressure of the large spring Z7, and determine whether the pressure meets the set standard.

[0050] Embodiment 2: A self-pressurizing fuel tank testing system, comprising: Figure 5-6 The hydraulic pump Y3 includes an oil storage cylinder E1, on which a hand pressure handle E2 and a fine-tuning handle E3 are installed. The oil storage cylinder E1 controls the oil pressure through the hand pressure handle E2 and the fine-tuning handle E3. The oil storage cylinder E1 is provided with a pipeline interface E4 and a pressure gauge interface E5. The oil storage cylinder E1 is connected to the pressure detection oil circuit Q1 through the pipeline interface E4, and the oil storage cylinder E1 is connected to the pressure gauge eight M8 through the pressure gauge interface E5.

[0051] See also Figure 7 , the mounting platform Y4 is provided with a support block A and a support block B, the self-pressurizing oil tank Z1 is supported by the support block A and the support block B, a pressure ring B1 is installed on the support block B, and the self-pressurizing oil tank Z1 is installed on the mounting platform Y4 through the pressure ring B1 and the support block B;

[0052] A low-pressure chamber oil pipe Z11 and a high-pressure chamber oil pipe Z12 are installed on the self-pressurizing oil tank Z1. The self-pressurizing oil tank Z1 is used to communicate with the low-pressure branch Q3 through the low-pressure chamber oil pipe Z11, and is used to communicate with the high-pressure branch Q2 through the high-pressure chamber oil pipe Z12. A dial indicator E7 is provided on one side of the support block B.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A self-pressurizing fuel tank test system, characterized in that: It comprises a hydraulic workstation (Y1), a test bench (Y2), a hydraulic pump (Y3) and a mounting platform (Y4), wherein the hydraulic workstation (Y1) is installed inside the test bench (Y2), the hydraulic pump (Y3) and the mounting platform (Y4) are fixedly installed on the test bench (Y2), and the self-pressurizing oil tank (Z1) is installed on the mounting platform (Y4); The oil outlet of the hydraulic workstation (Y1) is connected to a three-way control valve O (K0), the two outlets of the three-way control valve O (K0) are respectively connected to a pressure detection oil circuit (Q1) and a high-pressure sealing detection oil circuit (W1), the outlet of the pressure detection oil circuit (Q1) is respectively connected to a high-pressure branch (Q2) and a low-pressure branch (Q3), the high-pressure chamber (Z2) of the self-pressurizing oil tank is connected to a three-way control valve ten (K10), and the outlet of the high-pressure sealing detection oil circuit (W1) is connected to the three-way control valve ten (K10); The high-pressure branch (Q2) is used to connect to the three-way control valve ten (K10), the low-pressure branch (Q3) is used to communicate with the low-pressure chamber (Z3) of the self-pressurizing oil tank, the pressure detection oil circuit (Q1) is connected to the hydraulic pump (Y3), and the outlets of the high-pressure branch (Q2) and the low-pressure branch (Q3) are both connected to the oil return pipeline (Y5) of the hydraulic workstation (Y1); The test system is used to detect the starting pressure of the high-pressure chamber (Z2) of the self-pressurized oil tank: adjusting the pressure in the high-pressure chamber (Z2) and the pressure in the low-pressure chamber (Z3) to preset values, increasing the pressure in the high-pressure chamber (Z2), and recording the pressure in the high-pressure chamber (Z2) when the oil level dipstick (Z10) starts to move; The test system is also used to detect the starting pressure of the low-pressure chamber (Z3) of the self-pressurized oil tank: adjust the pressure in the high-pressure chamber (Z2) and the pressure in the low-pressure chamber (Z3) to preset values, increase the pressure in the low-pressure chamber (Z3), and detect the pressure in the low-pressure chamber (Z3) when the oil level dipstick (Z10) starts to move.

2. The self-pressurizing fuel tank testing system according to claim 1, characterized in that: The pressure detection oil circuit (Q1) is equipped with a through control valve 1 (K1), a through control valve 3 (K3), a pressure gauge 5 (M5), a pressure regulating valve (E6), a pressure gauge 4 (M4), a through control valve 4 (K4) and a first filter (Y6); one end of the through control valve 4 (K4) is connected to a hydraulic pump (Y3); The low-pressure branch (Q3) is provided with a through control valve five (K5) and a through control valve seven (K7); the low-pressure branch (Q3) is provided with a through control valve nine (K9); a pressure gauge three (M3) is provided on one side of the through control valve nine (K9); the low-pressure chamber (Z3) is arranged between the through control valve five (K5) and the through control valve seven (K7); the low-pressure branch (Q3) is connected to the low-pressure chamber (Z3) through the outlet of the through control valve five (K5); The high-pressure branch (Q2) is provided with a straight-through control valve six (K6) and a straight-through control valve eight (K8), the high-pressure branch (Q2) is provided with a pressure gauge one (M1), and the three-way control valve ten (K10) is arranged between the straight-through control valve six (K6) and the straight-through control valve eight (K8).

3. The self-pressurizing fuel tank testing system according to any one of claims 1 to 2, characterized in that: The outlet of the high-pressure sealing detection oil circuit (W1) is connected to the high-pressure chamber (Z2) through the three-way control valve ten (K10), and the high-pressure sealing detection oil circuit (W1) is installed with a straight-through control valve two (K2), a pointer pressure gauge six (M6) and a second filter (Y7).

4. The self-pressurizing fuel tank testing system according to claim 1, characterized in that: The hydraulic pump (Y3) comprises an oil storage cylinder (E1), on which a hand pressure handle (E2) and a fine adjustment handle (E3) are installed. The oil storage cylinder (E1) controls the oil pressure through the hand pressure handle (E2) and the fine adjustment handle (E3). The oil storage cylinder (E1) is provided with a pipeline interface (E4) and a pressure gauge interface (E5). The oil storage cylinder (E1) is connected to a pressure detection oil circuit (Q1) through the pipeline interface (E4), and the oil storage cylinder (E1) is connected to a pressure gauge eight (M8) through the pressure gauge interface (E5).

5. The self-pressurizing fuel tank testing system according to claim 1, characterized in that: The mounting platform (Y4) is provided with a support block (A) and a support block (B), the self-pressurizing oil tank (Z1) is supported by the support block (A) and the support block (B), a pressure ring (B1) is installed on the support block (B), and the self-pressurizing oil tank (Z1) is installed on the mounting platform (Y4) through the pressure ring (B1) and the support block (B); A low-pressure chamber oil pipe (Z11) and a high-pressure chamber oil pipe (Z12) are installed on the self-pressurizing oil tank (Z1); the self-pressurizing oil tank (Z1) is used to communicate with the low-pressure branch (Q3) through the low-pressure chamber oil pipe (Z11), and is used to communicate with the high-pressure branch (Q2) through the high-pressure chamber oil pipe (Z12); and a dial indicator (E7) is provided on one side of the support block (B).

6. The self-pressurizing fuel tank testing system according to claim 1, characterized in that: The test system is also used to detect the sealing performance of the low-pressure chamber (Z3) of the self-pressurized oil tank: the hydraulic workstation (Y1) injects oil and pressurizes the low-pressure chamber (Z3) through the pressure detection oil circuit (Q1) and the low-pressure branch (Q3), controls the pressure detection oil circuit (Q1) to be closed, adjusts the pressure of the low-pressure chamber (Z3) to a set value and maintains it, and checks the sealing of the low-pressure chamber (Z3).

7. The self-pressurizing fuel tank testing system according to claim 1, characterized in that: The test system is also used to detect the elastic force of the small spring (Z6) of the self-pressurized oil tank to overcome the resistance: Fill the low-pressure chamber (Z3) with oil, control the pressure detection oil circuit (Q1) to be closed, release the closure of the pressure detection oil circuit (Q1), allow the small spring (Z6) to recover its deformation and push the piston to move in the low-pressure chamber (Z3), record the position of the oil level dipstick (Z10) before and after the piston moves, and obtain the moving distance of the small spring (Z6) from the booster tank to overcome the resistance.

8. The self-pressurizing fuel tank testing system according to claim 1, characterized in that: The test system is also used to detect the self-boosting pressure of the low-pressure chamber (Z3) of the self-boosting oil tank: Fill the low-pressure chamber (Z3) with oil and seal it, record the position of the oil level dipstick (Z10), control the large spring (Z7) of the self-pressurizing oil tank to act on the large piston (Z5), compare the pressure values ​​of the low-pressure chamber (Z3) before and after the large spring (Z7) acts on the large piston (Z5), and detect the self-pressurizing pressure of the low-pressure chamber (Z3) of the self-pressurizing oil tank.

9. The self-pressurizing fuel tank testing system according to claim 2, characterized in that: The method for the test system to detect the starting pressure of the high-pressure chamber (Z2) of the self-pressurizing oil tank also includes: filling the high-pressure chamber (Z2) with oil to make the small spring (Z6) of the self-pressurizing oil tank close to the natural state, releasing the pressure of the low-pressure chamber (Z3) and the high-pressure chamber (Z2) to make the small spring (Z6) in the natural state, using a hydraulic pump (Y3) to inject oil and pressurize the high-pressure chamber (Z2) through the pressure detection oil circuit (Q1) and the high-pressure branch (Q2), and obtaining the high-pressure starting pressure by obtaining the pressure of the high-pressure chamber (Z2) when the oil level dipstick (Z10) starts to move; The method for the test system to detect the starting pressure of the low-pressure chamber (Z3) of the self-pressurized oil tank also includes: injecting oil into the high-pressure chamber (Z2) to increase pressure through the pressure detection oil circuit (Q1) and the high-pressure branch (Q2), relieving the pressure of the high-pressure chamber (Z2) to place the small spring (Z6) in a natural state, injecting oil into the low-pressure chamber (Z3) to increase pressure through the pressure detection oil circuit (Q1) and the low-pressure branch (Q3) using a hydraulic pump (Y3), and obtaining the low-pressure starting pressure by obtaining the pressure of the low-pressure chamber (Z3) when the oil level dipstick (Z10) starts to move.

10. The self-pressurizing fuel tank testing system according to claim 3, characterized in that: include, The test system is also used to detect the sealing performance of the high-pressure chamber (Z2) of the self-pressurized oil tank: the pressure of the high-pressure chamber (Z2) is adjusted and maintained through the hydraulic workstation (Y1) and the high-pressure sealing detection oil circuit (W1), and the sealing of the high-pressure chamber (Z2) is checked.

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