Pressure test tool for fuel booster pump shell and test method thereof

Abstract

The invention discloses a pressure test tool for a fuel oil booster pump shell, which comprises a base mounted at the lower end of the fuel oil booster pump shell when a pressure test is carried out on the fuel oil booster pump shell, and is characterized in that the base is placed on a workbench on which the pressure test needs to be carried out on the fuel oil booster pump shell; and the gland structure is used for pressing the fuel oil booster pump shell on the base when a pressure test is carried out on the fuel oil booster pump shell, and the gland structure is arranged at the upper end of the fuel oil booster pump shell needing to be subjected to the pressure test. Through effective combination of the low-pressure test structure and the high-pressure test structure, the upper part and the lower part of the fuel booster pump shell can be subjected to corresponding high-pressure and low-pressure tests, the pressure test tool is poor in overall sealing performance, and in the test process, the test efficiency is greatly improved. Oil is not easy to leak out from gaps between the fuel oil booster pump shell and the low-pressure test structure and between the fuel oil booster pump shell and the high-pressure test structure, and great convenience is brought to pressure test work of the fuel oil booster pump shell.

Description

Technical Field

[0001] The invention relates to the technical field of fuel booster pump housing pressure testing, and in particular to a fuel booster pump housing pressure testing tool and a testing method thereof. Background Art

[0002] Liquid fuel cannot be burned directly. It can only be burned by gasifying liquid fuel and mixing it with air through a fuel booster pump to form a combustible gas. Fuel booster pumps are mainly used in power systems in the fields of aviation and navigation. Their performance directly affects the safety and performance of the power system. Therefore, the production quality of fuel booster pumps is crucial. Fuel booster pumps mainly rely on multi-way valves to control the rise of the plunger, pump out high-pressure fuel, and enter the cylinder through high-pressure oil pipes and injectors. The injector converts liquid oil into fine mist particles and spreads them in the combustion chamber to facilitate the heating, evaporation, and diffusion of the fuel. After that, the multi-way valve is used to drain the oil to return the plunger to its position.

[0003] Therefore, the sealing performance of the fuel booster pump housing will affect the amount of fuel injected by the injector, which will affect the operation of the diesel engine. Therefore, it is necessary to use a pressure test tool to perform a pressure test on the fuel booster pump housing to detect the sealing performance of the fuel booster pump housing.

[0004] At present, the overall design of the pressure test tooling used to detect the fuel booster pump housing is relatively complex, and the entire detection process is relatively cumbersome, and the corresponding pressure test on the fuel booster pump housing cannot be performed efficiently. In addition, the overall sealing performance of the existing pressure test tooling used to detect the fuel booster pump housing is poor. During the test, oil is very likely to leak from the gap between the fuel booster pump housing and the pressure test tooling, which brings great inconvenience to the pressure test work of the fuel booster pump housing. Summary of the invention

[0005] In order to solve the problems existing in the prior art, the purpose of the present invention is to provide a pressure test tool and a test method for a fuel booster pump housing. The pressure test tool and the test method have a reasonable overall design, a simple structure, and are easy to operate. Through the effective combination of the low-pressure pressure test structure and the high-pressure pressure test structure, the upper and lower parts of the fuel booster pump housing can be subjected to corresponding high and low pressure tests. The overall sealing performance of the pressure test tool is poor. During the test, the oil is not easy to leak out from the gap between the fuel booster pump housing and the low-pressure pressure test structure and the high-pressure pressure test structure, which brings great convenience to the pressure test work of the fuel booster pump housing.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A pressure test tool for a fuel booster pump housing, characterized in that it includes

[0008] A base installed on the lower end of the fuel booster pump housing when performing a pressure test on the fuel booster pump housing, the base being placed on a workbench where the fuel booster pump housing needs to be pressure tested;

[0009] A gland structure for pressing the fuel booster pump housing onto the base when performing a pressure test on the housing, wherein the gland structure is arranged on the upper end of the fuel booster pump housing that needs to be pressure tested;

[0010] A stud structure for effectively connecting the base and the gland structure, wherein the stud structure is arranged between the base and the gland structure;

[0011] a low-pressure test structure for performing a low-pressure test on the upper portion of the fuel booster pump housing, wherein the low-pressure test structure is connected to a low-pressure chamber disposed on the upper portion of the fuel booster pump housing;

[0012] A high pressure test structure for performing a high pressure test on the lower part of a fuel booster pump housing, wherein the high pressure test structure is communicated with a high pressure chamber arranged at the lower part of the fuel booster pump housing.

[0013] In a preferred embodiment of the present invention, a lower protrusion protruding toward one side of the fuel boost pump housing is provided in the middle of the base, and the lower protrusion extends into the inner cavity of the lower part of the fuel boost pump housing, and a high-pressure chamber requiring a high-pressure test is provided between the outer wall of the lower protrusion and the inner wall of the lower inner cavity of the fuel boost pump housing.

[0014] In a preferred embodiment of the present invention, a high-pressure upper end sealing ring for improving the sealing performance is provided between the upper end of the lower protrusion and the inner cavity of the lower part of the fuel boost pump housing, and the high-pressure upper end sealing ring is arranged in a high-pressure upper end sealing groove opened on the outer peripheral surface of the upper end of the lower protrusion.

[0015] In a preferred embodiment of the present invention, a high-pressure lower end sealing groove is provided on the base and in the circumferential direction of the inner cavity located at the lower part of the fuel boost pump housing, and a high-pressure lower end sealing ring is provided in the high-pressure lower end sealing groove for improving the sealing performance between the base and the lower end of the fuel boost pump housing.

[0016] In a preferred embodiment of the present invention, the gland structure comprises

[0017] A cover plate, the cover plate is arranged on the upper end of the fuel booster pump housing, an upper convex foot is arranged in the middle of the cover plate and protrudes toward one side of the fuel booster pump housing, the upper convex foot extends into the inner cavity of the upper part of the fuel booster pump housing, and a low-pressure cavity requiring a low-pressure test is arranged between the outer wall of the cover plate and the inner wall of the upper inner cavity of the fuel booster pump housing;

[0018] A pressure plate is used to press the cover plate onto the upper end of the fuel boost pump housing. The pressure plate is pressed onto the upper side of the cover plate and fixedly mounted at the upper end of the fuel boost pump housing by upper screws.

[0019] In a preferred embodiment of the present invention, a low-pressure lower end sealing ring for improving the sealing performance is provided between the lower end of the upper protrusion and the inner cavity of the upper part of the fuel boost pump housing, and the low-pressure lower end sealing ring is arranged in a low-pressure lower end sealing groove opened on the outer peripheral surface of the lower end of the upper protrusion.

[0020] In a preferred embodiment of the present invention, a low-pressure upper end sealing ring for improving the sealing performance is provided between the upper end of the upper protrusion and the inner cavity of the upper part of the fuel boost pump housing, and the low-pressure upper end sealing ring is arranged in a low-pressure upper end sealing groove opened on the outer peripheral surface of the upper end of the upper protrusion.

[0021] In a preferred embodiment of the present invention, the stud structure includes two screws symmetrically arranged on both sides of the pressure plate, and the lower ends of the screws pass through the through holes respectively opened on both sides of the pressure plate and the cover plate and then cooperate with the threaded holes symmetrically opened on both sides of the base, and a nut is provided at the upper end of the screw.

[0022] In a preferred embodiment of the present invention, the low-pressure pressure test structure includes a low-pressure pump pressure joint, the oil inlet of the low-pressure pump pressure joint is connected with the oil outlet of the low-pressure pressure equipment, the oil outlet of the low-pressure pump pressure joint is installed on the fuel boost pump housing through a blind plate and is connected with the low-pressure chamber on the upper part of the fuel boost pump housing, and a low-pressure oil inlet channel distributed along its axis is opened at the center position of the low-pressure pump pressure joint.

[0023] In a preferred embodiment of the present invention, the high-pressure pressure test structure includes a high-pressure pump pressure joint, the oil inlet of the high-pressure pump pressure joint is connected with the oil outlet of the high-pressure pressure equipment, the oil outlet of the high-pressure pump pressure joint is connected with the high-pressure chamber at the lower part of the fuel boost pump housing through an oil channel opened on the fuel boost pump housing, and a high-pressure oil inlet channel distributed along its axis is opened at the center position of the high-pressure pump pressure joint.

[0024] A method for pressure testing a fuel booster pump housing, characterized in that it comprises the following steps:

[0025] The first step: placing the base horizontally on the test platform, and then vertically installing the fuel booster pump housing to be pressure tested on the base so that its lower protruding foot is inserted into the inner cavity at the lower part of the fuel booster pump housing;

[0026] The second step: installing the gland structure on the upper end of the fuel booster pump housing that needs to be pressure tested, inserting the upper protruding foot into the inner cavity of the upper part of the fuel booster pump housing, and connecting the gland structure to the base through the stud structure;

[0027] The third step: install the blanking plate bolts to the upper part of the fuel booster pump housing, then install the low-pressure joint gasket on the oil outlet end of the low-pressure pump pressure joint, install the oil outlet end on the blanking plate, and make it connected with the low-pressure chamber set on the upper part of the fuel booster pump housing, and then connect the oil inlet of the low-pressure pump pressure joint with the oil outlet of the low-pressure pressure device;

[0028] Step 4: Install the high-pressure joint gasket on the oil outlet end of the high-pressure pump joint, install the oil outlet end on the lower part of the fuel booster pump housing, and connect it with the high-pressure chamber arranged at the lower part of the fuel booster pump housing through the oil passage arranged at the lower part of the fuel booster pump housing, and then connect the oil inlet of the high-pressure pump joint with the oil outlet of the high-pressure pressure device;

[0029] Step 5: Simultaneously start the low-pressure pressure equipment and the high-pressure pressure equipment to perform corresponding low-pressure and high-pressure pressure tests on the upper and lower parts of the fuel boost pump housing respectively.

[0030] Compared with the prior art, the present invention has a reasonable overall design, a simple structure, and is easy to operate. Through the effective combination of the low-pressure pressure test structure and the high-pressure pressure test structure, the upper and lower parts of the fuel booster pump housing can be subjected to corresponding high and low pressure tests. The overall sealing performance of the pressure test tooling is poor. During the test, the oil is not easy to leak out from the gap between the fuel booster pump housing and the low-pressure pressure test structure and the high-pressure pressure test structure, which brings great convenience to the pressure test work of the fuel booster pump housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a structural schematic diagram of the present invention.

[0033] Figure 2 It is a structural schematic diagram of the base of the present invention.

[0034] Figure 3 It is a structural schematic diagram of the pressing plate of the present invention.

[0035] Figure 4It is a structural schematic diagram of the cover plate of the present invention.

[0036] Figure 5 It is a structural schematic diagram of the dead plate of the present invention. DETAILED DESCRIPTION

[0037] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below with reference to specific diagrams.

[0038] Reference Figure 1-Figure 5 As shown, a pressure test fixture for a fuel boost pump housing is shown, including a base 100, a gland structure 200, a stud structure 300, a low-pressure pressure test structure 400 and a high-pressure pressure test structure 500.

[0039] The base 100 is installed on the lower end of the fuel booster pump housing 1200 when a pressure test is performed on the fuel booster pump housing 1200. The base 100 is placed on a workbench where a pressure test is required on the fuel booster pump housing 1200.

[0040] The gland structure 200 is used to press the fuel boost pump housing 1200 onto the base 100 when performing a pressure test on the fuel boost pump housing 1200. The gland structure 200 is disposed on the upper end of the fuel boost pump housing 1200 that needs to be pressure tested.

[0041] The stud structure 300 is used to effectively connect the base 100 and the gland structure 200 . The stud structure 300 is disposed between the base 100 and the gland structure 200 .

[0042] The low-pressure test structure 400 is used to perform a low-pressure test on the upper portion of the fuel boost pump housing 1200 . The low-pressure test structure 400 is connected to a low-pressure chamber disposed at the upper portion of the fuel boost pump housing 1200 .

[0043] The high-pressure pressure test structure 500 is used to perform a high-pressure pressure test on the lower part of the fuel boost pump housing 1200 . The high-pressure pressure test structure 500 is connected to a high-pressure chamber provided at the lower part of the fuel boost pump housing 1200 .

[0044] A lower protrusion 110 is provided in the middle of the base 100 and protrudes toward one side of the fuel boost pump housing 1200. The lower protrusion 110 extends into the inner cavity at the lower part of the fuel boost pump housing 1200. A high-pressure chamber 700 for high-pressure testing is provided between its outer wall and the inner wall of the lower inner cavity of the fuel boost pump housing 1200.

[0045] A high-pressure upper end sealing ring 1000 is provided between the upper end of the lower protruding foot 110 and the inner cavity of the lower part of the fuel boost pump housing 1200 for improving the sealing performance therebetween. The high-pressure upper end sealing ring 1000 is arranged in a high-pressure upper end sealing groove 120 opened on the upper end outer peripheral surface of the lower protruding foot 110.

[0046] A high-pressure lower end sealing groove 130 is provided on the base 100 and in the circumferential direction of the inner cavity at the lower part of the fuel boost pump housing 1200. A high-pressure lower end sealing ring 1100 is provided in the high-pressure lower end sealing groove 130 for improving the sealing performance between the base 100 and the lower end of the fuel boost pump housing 1200. This effectively improves the sealing performance between the base and the inner cavity at the lower part of the fuel boost pump housing.

[0047] The gland structure 200 includes a cover plate 210 and a pressure plate 220. The cover plate 210 is arranged on the upper end of the fuel boost pump housing 1200. An upper protrusion 211 protruding toward one side of the fuel boost pump housing 1200 is provided in the middle of the cover plate 210. The upper protrusion 211 extends into the inner cavity of the upper part of the fuel boost pump housing 1200. A low-pressure chamber 600 requiring a low-pressure test is provided between its outer wall and the inner wall of the upper inner cavity of the fuel boost pump housing 1200.

[0048] The pressure plate 220 is used to press the cover plate 210 onto the upper end of the fuel boost pump housing 1200. The pressure plate 220 is pressed on the upper side of the cover plate 210. Screw fixing holes 221 are symmetrically provided on the pressure plate 220, and the upper screws 1300 are passed through the screw fixing holes 221 to fix it at the upper end of the fuel boost pump housing 1200.

[0049] A low-pressure lower end sealing ring 900 is provided between the lower end of the upper protrusion 211 and the inner cavity of the upper part of the fuel boost pump housing 1200 for improving the sealing performance therebetween. The low-pressure lower end sealing ring 900 is arranged in a low-pressure lower end sealing groove 214 opened on the outer peripheral surface of the lower end of the upper protrusion 211.

[0050] A low-pressure upper end sealing ring 800 is provided between the upper end of the upper protrusion 211 and the inner cavity of the upper part of the fuel boost pump housing 1200 for improving the sealing performance therebetween. The low-pressure upper end sealing ring 800 is arranged in a low-pressure upper end sealing groove 212 opened on the upper end outer peripheral surface of the upper protrusion 211. This effectively improves the sealing performance between the cover plate and the inner cavity of the upper part of the fuel boost pump housing.

[0051] The stud structure 300 includes two screws 310 symmetrically arranged on both sides of the pressure plate 220. The lower ends of the screws 310 pass through the through holes respectively opened on both sides of the pressure plate 220 and the cover plate 210 and then cooperate with the threaded holes 140 symmetrically opened on both sides of the base 100. A nut 311 is provided at the upper end of the screw 310.

[0052] The low-pressure test structure 400 includes a low-pressure pump pressure joint 410, the oil inlet of the low-pressure pump pressure joint 410 is connected with the oil outlet of the low-pressure pressure equipment, a low-pressure gasket 420 is provided at the oil outlet of the low-pressure pump pressure joint 410, and the oil outlet is installed on the fuel boost pump housing 1200 through a blocking plate 430 and is connected with the low-pressure chamber 600 on the upper part of the fuel boost pump housing 1200, and a low-pressure oil inlet channel 411 distributed along its axis is opened at the center position of the low-pressure pump pressure joint 410.

[0053] The high-pressure pressure test structure 500 includes a high-pressure pump pressure joint 510, the oil inlet of the high-pressure pump pressure joint 510 is connected with the oil outlet of the high-pressure pressure equipment, a high-pressure gasket 520 is provided at the oil outlet of the high-pressure pump pressure joint 510, and its oil outlet is connected with the high-pressure chamber 700 at the lower part of the fuel boost pump housing through an oil channel opened on the fuel boost pump housing 1200, and a high-pressure oil inlet channel 511 distributed along its axis is opened at the center position of the high-pressure pump pressure joint 510.

[0054] A method for pressure testing a fuel booster pump housing comprises the following steps:

[0055] The first step: placing the base horizontally on the test platform, and then vertically installing the fuel booster pump housing to be pressure tested on the base so that its lower protruding foot is inserted into the inner cavity at the lower part of the fuel booster pump housing;

[0056] The second step: installing the gland structure on the upper end of the fuel booster pump housing that needs to be pressure tested, inserting the upper protruding foot into the inner cavity of the upper part of the fuel booster pump housing, and connecting the gland structure to the base through the stud structure;

[0057] The third step: install the blanking plate bolts to the upper part of the fuel booster pump housing, then install the low-pressure joint gasket on the oil outlet end of the low-pressure pump pressure joint, install the oil outlet end on the blanking plate, and make it connected with the low-pressure chamber set on the upper part of the fuel booster pump housing, and then connect the oil inlet of the low-pressure pump pressure joint with the oil outlet of the low-pressure pressure device;

[0058] Step 4: Install the high-pressure joint gasket on the oil outlet end of the high-pressure pump joint, install the oil outlet end on the lower part of the fuel booster pump housing, and connect it with the high-pressure chamber arranged at the lower part of the fuel booster pump housing through the oil passage arranged at the lower part of the fuel booster pump housing, and then connect the oil inlet of the high-pressure pump joint with the oil outlet of the high-pressure pressure device;

[0059] Step 5: Simultaneously start the low-pressure pressure equipment and the high-pressure pressure equipment to perform corresponding low-pressure and high-pressure pressure tests on the upper and lower parts of the fuel boost pump housing respectively.

[0060] In summary, the overall design of the present invention is reasonable, the structure is simple, and the operation is convenient. Through the effective combination of the low-pressure pressure test structure and the high-pressure pressure test structure, the upper and lower parts of the fuel boost pump housing can be subjected to corresponding high and low pressure tests. The overall sealing performance of the pressure test tooling is poor. During the test, the oil is not easy to leak out from the gap between the fuel boost pump housing and the low-pressure pressure test structure and the high-pressure pressure test structure, which brings great convenience to the pressure test work of the fuel boost pump housing.

[0061] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A pressure test tool for a fuel booster pump housing, characterized in that: include A base installed on the lower end of the fuel booster pump housing when performing a pressure test on the fuel booster pump housing, the base being placed on a workbench where the fuel booster pump housing needs to be pressure tested; A gland structure for pressing the fuel booster pump housing onto the base when performing a pressure test on the housing, wherein the gland structure is arranged on the upper end of the fuel booster pump housing that needs to be pressure tested; A stud structure for effectively connecting the base and the gland structure, wherein the stud structure is arranged between the base and the gland structure; a low-pressure test structure for performing a low-pressure test on the upper portion of the fuel booster pump housing, wherein the low-pressure test structure is connected to a low-pressure chamber disposed on the upper portion of the fuel booster pump housing; A high pressure test structure for performing a high pressure test on the lower part of a fuel booster pump housing, wherein the high pressure test structure is communicated with a high pressure chamber arranged at the lower part of the fuel booster pump housing.

2. A pressure test fixture for a fuel booster pump housing as claimed in claim 1, characterized in that: A lower convex foot is provided in the middle of the base and protrudes toward one side of the fuel boost pump housing. The lower convex foot extends into the inner cavity at the lower part of the fuel boost pump housing. A high-pressure chamber for high-pressure testing is provided between the outer wall of the lower convex foot and the inner wall of the lower inner cavity of the fuel boost pump housing. A high-pressure upper end sealing ring for improving the sealing performance is provided between the upper end of the lower protruding foot and the inner cavity of the lower part of the fuel booster pump housing. The high-pressure upper end sealing ring is arranged in a high-pressure upper end sealing groove opened on the outer peripheral surface of the upper end of the lower protruding foot.

3. A pressure test fixture for a fuel booster pump housing as claimed in claim 2, characterized in that: A high-pressure lower end sealing groove is provided on the base and in the circumferential direction of the inner cavity at the lower part of the fuel booster pump housing. A high-pressure lower end sealing ring is provided in the high-pressure lower end sealing groove for improving the sealing performance between the base and the lower end of the fuel booster pump housing.

4. A pressure test fixture for a fuel booster pump housing as claimed in claim 1, characterized in that: The gland structure comprises A cover plate, the cover plate is arranged on the upper end of the fuel booster pump housing, an upper convex foot is arranged in the middle of the cover plate and protrudes toward one side of the fuel booster pump housing, the upper convex foot extends into the inner cavity of the upper part of the fuel booster pump housing, and a low-pressure cavity requiring a low-pressure test is arranged between the outer wall of the cover plate and the inner wall of the upper inner cavity of the fuel booster pump housing; A pressure plate is used to press the cover plate onto the upper end of the fuel boost pump housing. The pressure plate is pressed onto the upper side of the cover plate and fixedly mounted at the upper end of the fuel boost pump housing by upper screws.

5. A pressure test fixture for a fuel booster pump housing as claimed in claim 4, characterized in that: A low-pressure lower end sealing ring for improving the sealing performance is provided between the lower end of the upper protruding foot and the inner cavity of the upper part of the fuel booster pump housing. The low-pressure lower end sealing ring is arranged in a low-pressure lower end sealing groove opened on the outer peripheral surface of the lower end of the upper protruding foot.

6. A pressure test fixture for a fuel booster pump housing as claimed in claim 4, characterized in that: A low-pressure upper end sealing ring for improving the sealing performance is provided between the upper end of the upper protruding foot and the inner cavity of the upper part of the fuel booster pump housing. The low-pressure upper end sealing ring is arranged in a low-pressure upper end sealing groove opened on the outer peripheral surface of the upper end of the upper protruding foot.

7. A pressure test tool for a fuel booster pump housing as claimed in claim 1, characterized in that: The stud structure includes two screws symmetrically arranged on both sides of the pressure plate. The lower ends of the screws pass through the through holes respectively opened on both sides of the pressure plate and the cover plate and then cooperate with the threaded holes symmetrically opened on both sides of the base. A nut is provided at the upper end of the screw.

8. A pressure test tool for a fuel booster pump housing as claimed in claim 1, characterized in that: The low-pressure pressure test structure includes a low-pressure pump pressure joint, the oil inlet of the low-pressure pump pressure joint is connected with the oil outlet of the low-pressure pressure equipment, the oil outlet of the low-pressure pump pressure joint is installed on the fuel booster pump housing through a blocking plate and is connected with the low-pressure chamber on the upper part of the fuel booster pump housing, and a low-pressure oil inlet channel distributed along its axis is opened at the center position of the low-pressure pump pressure joint.

9. A pressure test fixture for a fuel booster pump housing as claimed in claim 1, characterized in that: The high-pressure pressure test structure includes a high-pressure pump pressure joint, the oil inlet of the high-pressure pump pressure joint is connected with the oil outlet of the high-pressure pressure equipment, the oil outlet of the high-pressure pump pressure joint is connected with the high-pressure chamber at the lower part of the fuel boost pump housing through an oil channel opened on the fuel boost pump housing, and a high-pressure oil inlet channel distributed along its axis is opened at the center position of the high-pressure pump pressure joint.

10. A method for pressure testing a fuel booster pump housing, characterized in that: The pressure test method is implemented based on a pressure test tool for a fuel booster pump housing as described in any one of claims 1 to 9, and comprises the following steps: The first step: placing the base horizontally on the test platform, and then vertically installing the fuel booster pump housing to be pressure tested on the base so that its lower protruding foot is inserted into the inner cavity at the lower part of the fuel booster pump housing; The second step: installing the gland structure on the upper end of the fuel booster pump housing that needs to be pressure tested, inserting the upper protruding foot into the inner cavity of the upper part of the fuel booster pump housing, and connecting the gland structure to the base through the stud structure; The third step: install the blanking plate bolts to the upper part of the fuel booster pump housing, then install the low-pressure joint gasket on the oil outlet end of the low-pressure pump pressure joint, install the oil outlet end on the blanking plate, and make it connected with the low-pressure chamber set on the upper part of the fuel booster pump housing, and then connect the oil inlet of the low-pressure pump pressure joint with the oil outlet of the low-pressure pressure device; Step 4: Install the high-pressure joint gasket on the oil outlet end of the high-pressure pump joint, install the oil outlet end on the lower part of the fuel booster pump housing, and connect it with the high-pressure chamber arranged at the lower part of the fuel booster pump housing through the oil passage arranged at the lower part of the fuel booster pump housing, and then connect the oil inlet of the high-pressure pump joint with the oil outlet of the high-pressure pressure device; Step 5: Start the low-pressure pressure device and the high-pressure pressure device at the same time to perform corresponding low-pressure and high-pressure pressure tests on the upper and lower parts of the fuel boost pump housing respectively.

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