Simple device suitable for opening test of pressure-limiting valve of gear pump of diesel engine

Abstract

A simple device suitable for a diesel engine gear pump pressure-limiting valve opening test comprises a pressure-limiting valve of a gear pump and further comprises a pressure-limiting valve simulation installation assembly, a portable manual hydraulic pump and a memory type pressure gauge, the portable manual hydraulic pump is arranged on one side of the memory type pressure gauge, and a guide pipe is arranged on the other side of the memory type pressure gauge. The other end of the conduit is communicated with the pressure-limiting valve simulation installation assembly. The pressure limiting valve simulation installation assembly is communicated with the portable manual hydraulic pump through a guide pipe. The pressure-limiting valve simulation installation assembly and a pressure-limiting valve of the gear pump are the same in installation structure and size. The pressure limiting valve simulation installation assembly is provided with an installation hole connected with the portable manual hydraulic pump. And the memory type pressure gauge is arranged on the portable manual hydraulic pump. The working environment of the pressure limiting valve in the actual gear pump can be accurately simulated, so that the accuracy and the reliability of a test result are ensured; by simulating the actual installation state, the performance of the pressure limiting valve in the high-pressure working environment can be reflected more truly.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical processing, in particular to a simple device suitable for an opening test of a pressure limiting valve of a gear pump of a diesel engine. Background Art

[0002] The pressure limiting valve of a diesel engine gear pump is an important safety device in the diesel engine fuel system or lubrication system. Its main function is to automatically open to release excess pressure when the system pressure exceeds the set value, thereby protecting the entire system from damage caused by excessive pressure.

[0003] At present, the opening test of the pressure limiting valve of the diesel engine gear pump is generally carried out on a test bench or with the help of a specific device. If the pressure limiting valve does not open within the required pressure range, the operator needs to stop the test, remove the pressure limiting valve from the gear pump, and readjust its setting value. Adjusting the pressure limiting valve usually requires the use of special tools and equipment to ensure the accuracy and reliability of its setting value. During the adjustment process, the operator needs to carefully observe the opening of the pressure limiting valve and gradually adjust its setting value as needed until the pressure limiting valve can open normally within the required pressure range before continuing with the subsequent flow test. The operation is relatively inconvenient. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a simple device suitable for opening test of a pressure limiting valve of a diesel engine gear pump, so as to at least partially solve the above technical problems.

[0005] The technical solution adopted by the utility model is as follows:

[0006] The utility model proposes a simple device suitable for an opening test of a pressure-limiting valve of a gear pump of a diesel engine, comprising a pressure-limiting valve of a gear pump, a pressure-limiting valve simulation installation component, a portable manual hydraulic pump and a memory-type pressure gauge, wherein the portable manual hydraulic pump is arranged on one side of the memory-type pressure gauge, a conduit is arranged on the other side of the memory-type pressure gauge, and the other end of the conduit is connected to the pressure-limiting valve simulation installation component.

[0007] As a further solution of the utility model, the pressure limiting valve simulation installation assembly is connected to the portable manual hydraulic pump through a conduit.

[0008] As a further solution of the present invention, the pressure-limiting valve simulation installation assembly has the same installation structure and dimensions as the pressure-limiting valve of the gear pump.

[0009] As a further solution of the utility model, the pressure limiting valve simulation installation component is provided with an installation hole connected to the portable manual hydraulic pump.

[0010] As a further solution of the utility model, the memory pressure gauge is installed on the portable manual hydraulic pump.

[0011] As a further solution of the utility model, the pressure limiting valve simulation installation assembly adopts Rp3 / 8 thread to be connected with the external thread at the interface of the portable manual hydraulic pump.

[0012] Implementing the technical solution of the utility model will have the following beneficial effects:

[0013] The opening pressure test of the pressure limiting valve of the diesel engine gear pump of the utility model can be carried out separately, and when the opening pressure of the pressure limiting valve is within a qualified range, it can be installed to the gear pump, eliminating the need for repeated disassembly, assembly and adjustment.

[0014] The utility model can accurately simulate the working environment of the pressure limiting valve in the actual gear pump, thereby ensuring the accuracy and reliability of the test results; by simulating the actual installation state, the performance of the pressure limiting valve in a high-pressure working environment can be more realistically reflected.

[0015] The portable manual hydraulic pump of the utility model makes the device portable and flexible, and can be carried out in different locations and environments, thereby improving the convenience and application scope of the test; at the same time, the operation of the manual hydraulic pump is relatively simple, and no additional power source is required, thereby further reducing the use cost and maintenance difficulty.

[0016] The utility model has a portable memory pressure gauge which can record and display the pressure changes during the test. By observing and analyzing the data of the pressure gauge, the test personnel can have a deeper understanding of the working state of the pressure limiting valve, thus providing a basis for subsequent improvement and optimization.

[0017] The connection between the pressure limiting valve simulation installation component of the utility model and the portable manual hydraulic pump adopts Rp3 / 8 thread, which ensures the stability and reliability of the connection, can effectively prevent problems such as pressure leakage or loose connection during the test process, and ensures the accuracy of the test results.

[0018] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of the gear pump pressure limiting valve installation proposed in the embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the pressure limiting valve simulation installation assembly proposed in an embodiment of the utility model.

[0022] In the figure: 1. Pressure limiting valve simulation installation assembly; 2. Portable manual hydraulic pump; 3. Memory type pressure gauge; 4. Catheter.

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. DETAILED DESCRIPTION

[0024] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0025] It should be noted that the terms "first", "second", etc. are only used to distinguish between description and position description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the feature defined as "first" etc. may explicitly or implicitly include one or more of the features; similarly, when the quantity of certain features is not limited in the form of words such as "two" or "three", it should be noted that the feature also explicitly or implicitly includes one or more feature quantities;

[0026] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms such as "installation", "connection", "fixation" and the like should be understood in a broad sense; for example, it can be a fixed connection, a detachable connection, or an integral molding; it can be a mechanical connection, a direct connection, welding, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the drawings in the specification and the specific circumstances.

[0027] In the description of the embodiments of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0028] like Figure 1 to Figure 2 As shown, an embodiment of the utility model provides a simple device suitable for a diesel engine gear pump pressure limiting valve opening test, including a pressure limiting valve of a gear pump, and also including a pressure limiting valve simulation installation component 1, a portable manual hydraulic pump 2 and a memory type pressure gauge 3. The portable manual hydraulic pump 2 is arranged on one side of the memory type pressure gauge, and a conduit 4 is provided on the other side of the memory type pressure gauge. The other end of the conduit 4 is connected to the pressure limiting valve simulation installation component 1.

[0029] In the specific application of the embodiment of the utility model, first, the pressure limiting valve assembly of the gear pump is installed on the pressure limiting valve simulation installation assembly 1 in the utility model; then, the gear pump pressure limiting valve to be tested is installed in the pressure limiting valve simulation installation assembly 1 shown; the memory pressure gauge 3 is installed on the portable manual hydraulic pump 2, and the portable manual hydraulic pump 2 and the pressure limiting valve simulation installation assembly 1 are connected by a high-pressure hose; to test the opening pressure of the gear pump pressure limiting valve, at this time, manually operate the portable manual hydraulic pump 2, and after the pressure reaches a certain value, the steel ball of the gear pump pressure limiting valve is forced to push the spring, and the pressure limiting valve opens, and the hydraulic oil leaks at this time; then one needle of the memory pressure gauge 3 falls directly, and the other needle remains at the pressure value at the moment of pressure relief, which is the value of the opening pressure of the pressure limiting valve.

[0030] The pressure limiting valve simulation installation assembly 1 in the device simulates the actual installation environment of the pressure limiting valve in the diesel engine gear pump, so that the pressure limiting valve can be tested in an environment close to the actual working state. The portable manual hydraulic pump 2 is the power source of the device, responsible for generating high-pressure oil and delivering the high-pressure oil to the pressure limiting valve simulation installation assembly 1 through the conduit 4. By manually operating the hydraulic pump, the opening test of the pressure limiting valve under different pressure conditions can be realized.

[0031] The memory type pressure gauge 3 is used to monitor and record the oil pressure passing through the pressure limiting valve in real time. It can not only display the current oil pressure value, but also memorize and save the pressure data in multiple tests, which is convenient for subsequent data analysis and processing. When the portable manual hydraulic pump 2 starts working, the high-pressure oil flows into the pressure limiting valve simulation installation component 1 through the conduit 4, and then acts on the pressure limiting valve. As the oil pressure increases, the pressure limiting valve will automatically open when it reaches its opening pressure, allowing excess oil to flow back, thereby preventing the system pressure from being too high.

[0032] The memory type pressure gauge 3 will continuously record the changes in the oil pressure, especially the pressure value at the moment the pressure limiting valve is opened. By comparing and analyzing these data, it can be determined whether the opening performance of the pressure limiting valve meets the design requirements.

[0033] In a possible implementation manner, the pressure-limiting valve simulation installation assembly 1 is connected to the portable manual hydraulic pump 2 through a conduit 4 .

[0034] In the specific application of the embodiment of the utility model, the pressure limiting valve simulation installation assembly 1 provides an installation and working condition of the pressure limiting valve in a similar real diesel engine working environment, and can simulate the layout and pressure changes of the internal oil circuit of the gear pump, so that the pressure limiting valve can be tested for performance under conditions similar to actual operation. The portable manual hydraulic pump 2 is responsible for generating high-pressure oil. Through manual operation, the hydraulic pump can pressurize the oil and transport the high-pressure oil to the pressure limiting valve simulation installation assembly 1 through the conduit 4; the conduit 4 not only connects the hydraulic pump and the simulation installation assembly, but also ensures the fluidity and pressure stability of the oil during the transportation process.

[0035] During the test, when the portable manual hydraulic pump 2 is started and produces high-pressure oil, the oil will flow into the pressure-limiting valve simulation installation assembly 1 through the conduit 4; when the pressure-limiting valve reaches its set working pressure, the pressure-limiting valve will open to allow excess oil to flow back to avoid excessive pressure in the system, thereby simulating and testing the normal operation of the pressure-limiting valve in the gear pump.

[0036] In a possible implementation manner, the pressure-limiting valve simulation installation assembly 1 has the same installation structure and dimensions as the pressure-limiting valve of the gear pump.

[0037] In the specific application of the embodiment of the utility model, the pressure-limiting valve simulation installation component 1 has the same installation structure as the pressure-limiting valve of the gear pump, which can ensure that the pressure-limiting valve simulation installation component 1 can completely simulate the installation position and working environment of the pressure-limiting valve inside the gear pump. The pressure-limiting valve simulation installation component 1 has the same size as the pressure-limiting valve of the gear pump, and the consistency of the size ensures that during the test, the pressure-limiting valve simulation installation component 1 can withstand the same pressure and load as the actual pressure-limiting valve.

[0038] The simple device can perform performance tests on the pressure-limiting valve under conditions close to the real working environment. The tester can manually operate the portable manual hydraulic pump 2 to gradually increase the pressure and observe when the pressure-limiting valve opens and its performance during the opening process.

[0039] In a possible implementation manner, the pressure-limiting valve simulation installation assembly 1 is provided with an installation hole connected to the portable manual hydraulic pump 2 .

[0040] In the specific application of the embodiment of the utility model, the pressure limiting valve simulation installation component 1 can simulate the actual installation environment and working state of the pressure limiting valve in the diesel engine gear pump. The pressure limiting valve simulation installation component 1 is provided with a mounting hole connected to the portable manual hydraulic pump 2, which can conveniently connect the hydraulic pump with the simulation installation component to form a complete test system.

[0041] During operation, the tester operates the portable manual hydraulic pump 2 to inject pressure oil into the pressure limiting valve simulation installation component 1. Due to the presence of the installation hole, the pressure oil can flow smoothly into the component and act on the simulated pressure limiting valve. As the pressure continues to increase, the tester can observe and record the opening of the pressure limiting valve, including the pressure value when opening, the performance during the opening process, and other key data.

[0042] In a possible implementation, the memory-type pressure gauge 3 is installed on the portable manual hydraulic pump 2 .

[0043] In the specific application of the embodiment of the utility model, in the diesel engine gear pump pressure limiting valve opening test, in order to ensure the accuracy and reliability of the test data, a memory type pressure gauge 3 is specially used in the simple device and installed on the portable manual hydraulic pump 2; this installation method enables the pressure gauge to display the pressure value output by the hydraulic pump in real time, providing an intuitive data reference for the test personnel. The memory type pressure gauge 3 has a unique memory function, which can record and save the highest pressure value during the test, which is particularly important in the pressure limiting valve opening test. It can help the test personnel accurately capture the pressure peak value at the moment of the pressure limiting valve opening, so as to judge the working state and performance of the pressure limiting valve.

[0044] During the test, as the portable manual hydraulic pump 2 is continuously operated, pressurized oil is injected into the pressure-limiting valve simulation installation assembly 1; the memory-type pressure gauge 3 will display the pressure value output by the hydraulic pump in real time, and gradually rise as the pressure increases. When the pressure-limiting valve reaches the opening condition, it will quickly open and release the pressure. At this time, the memory-type pressure gauge 3 will record the highest pressure value in this process.

[0045] Through the memory-type pressure gauge 3, testers can more accurately understand the working performance of the pressure-limiting valve under different pressure conditions, thereby providing strong data support for its subsequent maintenance and optimization; at the same time, the design of this simple device also improves the efficiency and convenience of the test, allowing testers to more easily perform the opening test of the pressure-limiting valve.

[0046] In a possible implementation, the pressure-limiting valve simulation installation assembly 1 is connected to the external thread at the interface of the portable manual hydraulic pump 2 using an Rp3 / 8 thread.

[0047] In the specific application of the embodiment of the utility model, the design of the threaded connection ensures the close fit and stable transmission between the pressure limiting valve simulation installation component 1 and the portable manual hydraulic pump 2. By rotating and locking, the Rp3 / 8 thread can firmly connect the two together to form a closed pressure test system. When the portable manual hydraulic pump 2 starts working, it will provide pressure oil to the pressure limiting valve simulation installation component 1 through the external thread at the interface. Due to the close connection of the thread, the pressure oil can be smoothly and stably transmitted to the pressure limiting valve simulation installation component 1, simulating the pressure environment generated by the gear pump during actual work.

[0048] In the pressure limiting valve simulation installation assembly 1, the pressure limiting valve will be placed in a specific position so that it can accurately respond to the simulated pressure environment. When the pressure reaches the opening threshold of the pressure limiting valve, the pressure limiting valve will automatically open to release the pressure, thereby protecting the gear pump from damage caused by excessive pressure.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0051] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A simple device suitable for opening test of pressure limiting valve of gear pump of diesel engine, comprising pressure limiting valve of gear pump, characterized in that: It also comprises a pressure-limiting valve simulation installation component (1), a portable manual hydraulic pump (2) and a memory-type pressure gauge (3), wherein the portable manual hydraulic pump (2) is arranged on one side of the memory-type pressure gauge, and a conduit (4) is arranged on the other side of the memory-type pressure gauge, and the other end of the conduit (4) is connected to the pressure-limiting valve simulation installation component (1).

2. A simple device suitable for diesel engine gear pump pressure limiting valve opening test according to claim 1, characterized in that: The pressure-limiting valve simulation installation assembly (1) is in communication with the portable manual hydraulic pump (2) via a conduit (4).

3. A simple device suitable for diesel engine gear pump pressure limiting valve opening test according to claim 1, characterized in that: The pressure-limiting valve simulation installation component (1) has the same installation structure and dimensions as the pressure-limiting valve of the gear pump.

4. A simple device suitable for diesel engine gear pump pressure limiting valve opening test according to claim 1, characterized in that: The pressure-limiting valve simulation installation component (1) is provided with an installation hole connected to the portable manual hydraulic pump (2).

5. A simple device suitable for diesel engine gear pump pressure limiting valve opening test according to claim 1, characterized in that: The memory type pressure gauge (3) is installed on the portable manual hydraulic pump (2).

6. A simple device suitable for diesel engine gear pump pressure limiting valve opening test according to claim 1, characterized in that: The pressure limiting valve simulation installation component (1) is connected to the external thread at the interface of the portable manual hydraulic pump (2) using an Rp3 / 8 thread.

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