Fuel pump switching device and fuel pump testing system

Abstract

The utility model belongs to the technical field of fuel pump performance testing, and relates to a fuel pump switching device and a fuel pump testing system. The switching device for testing the fuel pump comprises a first oil way, a second oil way, a shell, a spring, a supporting frame and a lining. The shell and the supporting frame are fixed in a butt joint mode, the lining is arranged in a cavity between the shell and the supporting frame, a spring is arranged between one end of the lining and the end of the inner wall of the shell, and the other end of the lining abuts against the end of the supporting frame. A first oil way connecting port and a second pipeline connecting port are formed in one side of the bushing; and the other side of the bushing is provided with a connector which is butted with two oil nozzles of the fuel pump. According to the device provided by the utility model, the bushing is pre-tightened by using the spring, after the oil pump is clamped, enough force is provided to ensure the reliability of connection between the oil nozzle of the oil pump and the device, and meanwhile, the contact position adopts plastic soft contact such as rubber, so that the oil nozzle is protected, and the reliable sealing performance is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of fuel pump performance testing, and relates to a fuel pump adapter device and a fuel pump testing system. Background Technique

[0002] The fuel pump is a key component in the fuel supply system, and its core function is to ensure a stable and sufficient fuel supply for the engine. During operation, the pump body is rotated by an electric motor to generate negative pressure, thereby sucking fuel from the fuel tank and delivering the fuel to the engine fuel supply pipeline by means of pressure. This process is crucial for the engine to continuously obtain the required fuel during operation and maintain normal power output. Therefore, fuel pumps are widely used in the fields of aerospace, ships, automobiles, industrial manufacturing, etc.

[0003] As a device for pumping fuel, the fuel pump delivers fuel to the engine. Before leaving the factory, the fuel pump needs to undergo various performance tests. The performance of the fuel pump directly affects the fuel supply volume and supply pressure of the engine, and has a decisive impact on aspects such as the starting, acceleration, and driving smoothness of the engine. During the production process of the fuel pump, we need to detect the performance of the fuel pump, such as detecting the flow rate, fuel pumping capacity, efficiency and other performances of the fuel pump, so as to judge whether the performance of the product meets the specified requirements. During the test, in order to ensure the connection reliability between the fuel pump and the oil circuit, generally, a threaded connection method is adopted at the nozzle. In this design form, it takes a relatively long time to clamp the fuel pump each time the fuel pump is tested. If a quick-insert oil circuit method is used, the integrity of the oil circuit will be damaged, and the reliability of the oil circuit will be reduced. Therefore, it is crucial to be able to quickly clamp the fuel pump during the fuel pump test while ensuring the sealing reliability of the oil port docking. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a fuel pump adapter device and a fuel pump testing system, which are used to solve the problem that the oil pump joint can be quickly replaced while ensuring the sealing performance during the fuel pump performance test.

[0005] Technical Solution: To achieve the above object, on the one hand, the utility model provides a fuel pump adapter device, including: a first oil circuit, a second oil circuit, a housing, a spring, a support frame, and a bushing;

[0006] The housing is butt-jointed and fixed with the support frame. The bushing is placed in the cavity between the housing and the support frame. A spring is arranged between one end of the bushing and the inner wall end of the housing, and the other end of the bushing abuts against the end of the support frame. A first oil circuit connection port and a second pipeline connection port are opened on one side of the bushing; interfaces for docking with two nozzles of the fuel pump are opened on the other side of the bushing.

[0007] Further, a circular limiting shoulder is opened along the inner hole at the end of the support frame for limiting the end of the bushing.

[0008] Further, the butt joint interface between the bushing and the fuel pump nozzle is arranged in a stepped structure, and sealing rings are arranged on the two stepped wall surfaces; the sealing ring can be a rubber ring.

[0009] Further, the first oil circuit connection port and the second pipeline connection port of the bushing are respectively butted with the first pipeline and the second pipeline, and the two pipelines are both fixed on the bushing.

[0010] Further, springs are arranged around the two pipelines, and the springs are in a compressed state.

[0011] On the other hand, the present utility model also proposes a fuel pump test system, and the test system includes:

[0012] A fuel pump, a fuel tank, a signal generator, a power supply, a controller, a pressure sensor, a flowmeter, and a quick-connect tooling;

[0013] The two nozzles of the fuel pump are connected to the test oil circuit through the quick-connect tooling; the test oil circuit includes a first oil circuit and a second oil circuit; one end of the first oil circuit is directly connected to the fuel tank, and the other end is connected to the inlet of the oil pump; the second oil circuit is divided into oil circuit A and oil circuit B. One end of oil circuit A is connected to the fuel tank, and the other end is connected to the outlet of the oil pump in series with a flow control valve; one end of oil circuit B is connected to the fuel tank, and the other end is connected to the outlet of the oil pump in series with a throttle valve, and a pressure sensor is also arranged between the throttle valve and the outlet of the oil pump; the flowmeter is communicated with the starting point of the second oil circuit;

[0014] The controller collects the signal of the pressure sensor and converts it into a corresponding control signal according to the test requirements. After being processed by the signal generator, the control signal drives the fuel pump to output a corresponding oil pressure, and the signal generator is powered by the power supply.

[0015] Further, the fuel pump is fixed on the test platform through a fixing bracket.

[0016] Technical effect: The fuel pump adapter device designed by the present utility model is a quick-connect tooling for fuel pump performance testing. This tooling can realize the quick replacement of the joints during the fuel pump testing process; avoid direct butt joint between the test pipeline and the fuel pump from damaging the nozzle; the device proposed by the present utility model uses a spring to pre-tighten the bushing. After the oil pump is clamped, there is enough force to ensure the reliability of the connection between the oil pump nozzle and the device. At the same time, the contact position adopts a soft contact of plastics such as rubber to protect the nozzle and has a reliable sealing performance. In the test system proposed by the present utility model, quick clamps are used before and after the fuel pump test, which is convenient for the installation and disassembly of the fuel pump and greatly improves the test efficiency. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the fuel pump adapter device proposed by the present utility model;

[0018] Figure 2 Schematic diagram of the composition of the fuel pump test system of the present utility model;

[0019] Among them, 1 - adapter joint, 2 - fixed bracket, 3 - fuel pump, 4 - signal generator, 5 - power supply, 6 - controller, 7 - pressure sensor, 8 - throttle valve, 9 - drain valve, 10 - fuel tank, 11 - flow meter, 12 - fixture;

[0020] 1A - first pipeline, 1B - second pipeline, 1C - spring, 1D - housing, 1F - bushing, 1G - first rubber ring, 1H - second rubber ring, 1J - support frame; 3A - first nozzle of the fuel pump, 3B - second nozzle of the fuel pump. Specific embodiments

[0021] Next, the technical solution of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work shall fall within the protection scope of the present utility model.

[0022] As Figure 1 , in order to achieve the quick connection between the fuel pump nozzles and the test pipeline, the present utility model specifically designs a fuel pump adapter device, including: a first oil pipeline 1A, a second oil pipeline 1B, a housing 1D, a spring 1C, a support frame 1J, and a bushing 1F;

[0023] After the housing 1D is butted with the support frame 1J, they are fixed into one body by screws; the bushing 1F is installed in the cavity between the housing 1D and the support frame 1J, and the bushing 1F can axially slide in the cavity; a spring 1C is arranged between one end of the bushing 1F and the inner wall end of the housing 1D, and under the action of the spring force, the other end of the bushing 1F abuts against the end of the support frame 1J; a connection port for the first oil pipeline 1A and a connection port for the second pipeline 1B are opened on one side of the bushing 1F; interfaces for docking with two nozzles (3A, 3B) of the fuel pump are opened on the other side of the bushing 1F.

[0024] In the designed structure, in order to better realize the end limit of the bushing, a circular limit shoulder is opened along the inner hole at the end of the support frame 1J. When the bushing 1F moves to the right, the shoulder can limit the end of the bushing to prevent the bushing from being ejected by the spring force.

[0025] In a specific implementation case, the docking interfaces between the bushing 1F and the fuel pump nozzles are set as a stepped structure, and rubber rings are arranged on the two stepped wall surfaces to achieve contact sealing, that is, the first rubber ring 1G and the second rubber ring 1H in the figure; the rubber rings can be directly fixed in the stepped docking interfaces to prevent the fuel pump nozzles from falling off during the docking process.

[0026] For the other side of the bushing, the first oil passage connection port and the second pipeline connection port are respectively butted against the first pipeline and the second pipeline, and both pipelines are fixed on the bushing. Springs are arranged around the two pipelines, and the springs are in a compressed state. They always hold against the bushing to ensure that the right side of the bushing is always butted tightly against the fuel pump nozzle, ensuring sealing reliability.

[0027] The present utility model also specifically proposes the specific application of the fuel pump adapter device designed as above. In an applicable test scenario, the fuel pump adapter device is used as a quick-connect tooling. See specifically Figure 2 as shown, a designed fuel pump test system, which test system includes:

[0028] Quick-connect tooling 1, fixed bracket 2, fuel pump 3, signal generator 4, power supply 5, controller 6, pressure sensor 7, throttle valve 8, drain valve 9, fuel tank 10, flow meter 11;

[0029] The two nozzles (3A, 3B) of the fuel pump 3 are connected to the test oil passage through the quick-connect tooling 1; the test oil passage includes a first oil passage and a second oil passage. One end of the first oil passage is directly connected to the fuel tank 10, and the other end is connected to the oil pump inlet; the second oil passage is divided into oil passage A and oil passage B. Among them, a drain valve 9 is connected in series on oil passage A. One end of oil passage A is connected to the fuel tank 10, and the other end is connected to the oil pump outlet;

[0030] A throttle valve 8 is connected in series on oil passage B; one end of oil passage B is connected to the fuel tank 10, and the other end is connected to the oil pump outlet; a pressure sensor 7 is also arranged between the oil pump outlet and the throttle valve 8; the flow meter 11 is communicated with the starting point of the second oil passage.

[0031] The controller 6 collects the signal of the pressure sensor 7 and according to the test requirements, converts it into a corresponding control signal, which is processed by the signal generator 4 and then drives the fuel pump 3 to output a corresponding oil pressure. The signal generator 4 is powered by the power supply 5. The fuel pump 3 is fixed on the test platform through the fixed bracket 2, and a clamp 12 is also arranged at the other end to realize the fixation of the fuel pump 3.

[0032] The above specific embodiments or cases are only used to explain and illustrate the technical solutions of the present utility model, and do not limit the present utility model. The parts not described in detail are regarded as conventional technical means in the art; those of ordinary skill in the art should understand that: based on the design concept of the present application, it should be possible to adaptively modify the technical solutions recorded in the foregoing embodiments, or equivalently replace some or all of the technical features therein. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present utility model.

Claims

1. A fuel pump adapter device, characterized in that, Including: The first oil circuit, the second oil circuit, the housing, the spring, the support frame, and the bushing; The housing is butt - joint fixed with the support frame. The bushing is placed in the cavity between the housing and the support frame. A spring is arranged between one end of the bushing and the inner wall end of the housing, and the other end of the bushing abuts against the end of the support frame. A first oil - circuit connection port and a second - pipeline connection port are opened on one side of the bushing. An interface for docking with two nozzles of the fuel pump is opened on the other side of the bushing.

2. The fuel pump adapter device according to claim 1, characterized in that, A circular limiting shoulder is opened along the inner hole at the end of the support frame for limiting the end of the bushing.

3. A fuel pump adapter device as claimed in claim 1, characterized in that, The interface for the bushing to dock with the fuel - pump nozzle is set as a stepped structure, and sealing rings are arranged on both stepped wall surfaces; the sealing rings can be rubber rings.

4. The fuel pump adapter device according to claim 3, characterized in that, The first oil - circuit connection port and the second - pipeline connection port of the bushing are respectively docked with the first pipeline and the second pipeline, and both pipelines are fixed on the bushing.

5. The fuel pump adapter device according to claim 4, characterized in that, Springs are arranged around the two pipelines, and the springs are in a compressed state.

6. A fuel pump test system, characterized in that, The test system includes: The fuel pump, the fuel tank, the signal generator, the power supply, the controller, the pressure sensor, the flowmeter, and the quick - plug tooling; the quick - plug tooling is the fuel - pump adapter device described in any one of claims 1 - 5; The two nozzles of the fuel pump are connected to the test oil circuit through the quick - plug tooling; the test oil circuit includes the first oil circuit and the second oil circuit; one end of the first oil circuit is directly connected to the fuel tank, and the other end is connected to the inlet of the oil pump; the second oil circuit is divided into oil circuit A and oil circuit B. One end of oil circuit A is connected to the fuel tank, and the other end is connected to the outlet of the oil pump after being connected in series with a bleed valve; one end of oil circuit B is connected to the fuel tank, and the other end is connected to the outlet of the oil pump after being connected in series with a throttle valve, and a pressure sensor is also arranged between the throttle valve and the outlet of the oil pump; the flowmeter is communicated with the starting point of the second oil circuit; The controller collects the signal of the pressure sensor and, according to the test requirements, converts it into a corresponding control signal. After being processed by the signal generator, it drives the fuel pump to output the corresponding oil pressure, and the signal generator is powered by the power supply.

7. The fuel pump test system according to claim 6, characterized in that, The fuel pump is fixed on the test platform through a fixed bracket.

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