Testing equipment for flow performance of fuel pump

Abstract

The utility model relates to the field of fuel pump testing, in particular to fuel pump flow performance testing equipment, which comprises a rack, an enclosure frame fixed at the upper end of the rack, a testing box fixed in the middle of the enclosure frame, a testing mechanism mounted in the testing box, and an impurity removal mechanism. Fuel oil is injected into the test box, after impurities in the fuel oil are precipitated to the bottom of the test box, the valve body on the oil pumping pipe is opened, then the pump body is started, the fuel oil at the bottom of the test box is pumped out through the pump body, when the fuel oil passes through the filter screen in the filter box, the impurities in the fuel oil can be filtered, and the fuel oil is connected into the test box through the output end of the return pipe; the filtered fuel oil flows back into the test box, the condition in the test box is observed through the observation plate, the valve body and the pump body on the oil pumping pipe are closed after impurities deposited at the bottom of the fuel oil are cleaned, and then the flow performance of the fuel oil pump can be tested. In this way, the possibility that impurities in the fuel oil affect the test result can be avoided to the maximum extent.

Description

Technical Field

[0001] The utility model relates to the field of fuel pump testing, in particular to a testing device for the flow performance of a fuel pump. Background Technique

[0002] A fuel pump is a professional term in the automotive parts industry. It is one of the basic components of an electronic fuel injection system for automobiles and is located inside the vehicle fuel tank. The function of the fuel pump is to suck fuel out of the fuel tank, pressurize it, and then transport it to the fuel supply pipe, and cooperate with the fuel pressure regulator to establish a certain fuel pressure. After the vehicle fuel pump is produced, it is necessary to use a testing device for the flow performance of the vehicle fuel pump to test the flow performance of the fuel pump.

[0003] After retrieving the patent document with the publication number CN214170791U, this patent document discloses "a testing device for the flow performance of a vehicle fuel pump. This device is provided with a fuel filter screen, a motor, a rotating shaft, and a brush. The motor is started by being externally connected to a power supply, driving the rotating shaft and the brush to rotate, so that the bristles move below the fuel filter screen. The bristles can sweep away foreign objects attached to the fuel filter screen and prevent impurities from accumulating near the fuel filter screen, making the fluidity at the bottom of the fuel pump better and preventing foreign objects in the fuel from attaching to the fuel filter screen, affecting the accuracy of the test data on the flow performance of the fuel pump.";

[0004] However, when the above device cleans the fuel filter screen, it is necessary for the motor to drive the brush structure to rotate to clean the fuel filter screen. Most of the existing cleaning structures are similar to the above structure. However, when cleaning in this way, it is easy to cause a certain fluctuation in the fuel liquid, and such filtration and cleaning are likely to affect the fuel pumping volume of the fuel pump, resulting in inaccurate flow measurement. Content of the Utility Model

[0005] The purpose of the utility model is to provide a testing device for the flow performance of a fuel pump to solve the above problems.

[0006] The utility model realizes the above purpose through the following technical solutions:

[0007] A testing device for the flow performance of a fuel pump includes a bench. A surrounding frame is fixed at the upper end of the bench, a testing box is fixed in the middle of the surrounding frame, a testing mechanism is installed inside the testing box, and an impurity removal mechanism is further included;

[0008] The impurity removal mechanism includes an observation plate fixed on the front end face of the testing box. A suction pipe is fixed at the bottom of the testing box. A drain pipe is arranged on one side of the suction pipe and is connected to the bottom of the testing box. Valves are installed in the middle of both the suction pipe and the drain pipe. A pump body is installed at the output end of the suction pipe. A filter box is fixed at the output end of the pump body. A filter screen is fixed inside the filter box. A return pipe is fixed at the output end of the filter box, and the output end of the return pipe extends into the testing box.

[0009] Preferably, the bottom of the test box has a structure that is wider at the top and narrower at the bottom, and the observation plate is made of a transparent material.

[0010] Preferably, the oil extraction pipe, the oil discharge pipe, and the reflux pipe are all rigid pipes made of plastic material.

[0011] Preferably, the filter screen has a frame-shaped structure with one end open.

[0012] Preferably, the test mechanism includes two electric push rods. The two electric push rods are respectively installed at both ends of the test box, and the telescopic ends of the two electric push rods are arranged opposite to each other. Clamping arc plates are fixed to the telescopic ends of the two electric push rods. A fuel pump main body is arranged between the two clamping arc plates. A circulation pipe is arranged at the upper end of the fuel pump main body, and the input end of the circulation pipe is connected to the oil outlet end of the fuel pump main body. A flow tester is installed in the middle section of the circulation pipe, and the outer shell structure of the flow tester is fixed to the upper end of the test box. A pressure regulating device is arranged on one side of the circulation pipe, and the output pipe of the pressure regulating device is connected to the circulation pipe.

[0013] Preferably, rubber layers are provided on the arc-shaped inner walls of the two clamping arc plates, and the output end of the circulation pipe faces the inside of the test box.

[0014] The beneficial effects compared with the prior art are as follows:

[0015] Before the device operates, fuel is injected into the test box. After the impurities in the fuel settle to the bottom of the test box, the valve body on the oil extraction pipe is opened, and then the pump body is started to pump out the fuel at the bottom of the test box. When the fuel passes through the filter screen in the filter box, the impurities in the fuel can be filtered. The filtered fuel flows back into the test box through the output end of the reflux pipe. The situation inside the test box is observed through the observation plate. When the impurities settled at the bottom of the fuel are cleared, the valve body and the pump body on the oil extraction pipe are closed, and then the flow performance of the fuel pump can be tested. In this way, the possibility that impurities in the fuel affect the test results can be maximally avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic structural diagram of a test device for the flow performance of a fuel pump according to the present invention;

[0018] Figure 2It is a schematic structural diagram of the impurity removal mechanism in a test device for the flow performance of a fuel pump according to the present utility model;

[0019] Figure 3 It is a main sectional view of the impurity removal mechanism in a test device for the flow performance of a fuel pump according to the present utility model;

[0020] Figure 4 It is a schematic structural diagram of the test box and the test mechanism in a test device for the flow performance of a fuel pump according to the present utility model.

[0021] The description of the reference numerals is as follows:

[0022] 1. Bench; 11. Base; 12. Fixing bolt; 2. Enclosure; 21. Test box; 22. Observation plate; 23. Oil suction pipe; 24. Drain pipe; 25. Valve body; 26. Pump body; 27. Filter box; 28. Filter net; 29. Return pipe; 3. Electric push rod; 31. Clamping arc plate; 32. Fuel pump main body; 33. Flow pipe; 34. Flow tester; 35. Pressure regulating device. Detailed implementation manners

[0023] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0024] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0025] The present utility model will be further described below with reference to the drawings:

[0026] As Figures 1-4 shown, a test device for the flow performance of a fuel pump includes a test bench 1. A surrounding frame 2 is fixed to the upper end of the test bench 1, and a test box 21 is fixed in the middle of the surrounding frame 2. A test mechanism is installed inside the test box 21, and an impurity removal mechanism is also included.

[0027] Two bases 11 are fixed to the lower end of the test bench 1, and a plurality of fixing bolts 12 are arranged in the middle of the bases 11; the device can be fixed to a suitable position through the fixing bolts 12.

[0028] The impurity removal mechanism includes an observation plate 22. The observation plate 22 is fixed to the front end face of the test box 21. The bottom of the test box 21 is of a structure that is wider at the top and narrower at the bottom. The observation plate 22 is made of a transparent material. An oil suction pipe 23 is fixed to the bottom of the test box 21. A drain pipe 24 is arranged on one side of the oil suction pipe 23, and the drain pipe 24 is connected to the bottom of the test box 21. Valves 25 are installed in the middle of both the oil suction pipe 23 and the drain pipe 24. A pump body 26 is installed at the output end of the oil suction pipe 23. A filter box 27 is fixed to the output end of the pump body 26. A filter net 28 is fixed inside the filter box 27. The filter net 28 is of a frame structure with one end open. A return pipe 29 is fixed to the output end of the filter box 27, and the output end of the return pipe 29 extends into the test box 21. The oil suction pipe 23, the drain pipe 24, and the return pipe 29 are all hard pipes made of plastic material; fuel is injected into the test box 21. After the impurities in the fuel precipitate to the bottom of the test box 21, the valve 25 on the oil suction pipe 23 is opened, and then the pump body 26 is started to pump out the fuel at the bottom of the test box 21. When the fuel passes through the filter net 28 in the filter box 27, the impurities inside the fuel can be filtered. The filtered fuel will flow back into the test box 21 through the output end of the return pipe 29. The situation inside the test box 21 is observed through the observation plate 22. When the impurities precipitated at the bottom of the fuel are cleared, the valve 25 on the oil suction pipe 23 and the pump body 26 are closed, and then the flow performance of the fuel pump can be tested. In this way, the possibility that impurities in the fuel affect the test results can be maximally avoided.

[0029] The testing mechanism includes two electric push rods 3, which are respectively installed at both ends of the test box 21, and the telescopic ends of the two electric push rods 3 are arranged oppositely. Clamping arc plates 31 are fixed to the telescopic ends of the two electric push rods 3. Rubber layers are provided on the inner arc walls of the two clamping arc plates 31. A fuel pump main body 32 is arranged between the two clamping arc plates 31. A circulation pipe 33 is provided at the upper end of the fuel pump main body 32. The output end of the circulation pipe 33 faces the inside of the test box 21, and the input end of the circulation pipe 33 is connected to the oil outlet end of the fuel pump main body 32. A flow tester 34 is installed in the middle section of the circulation pipe 33, and the housing structure of the flow tester 34 is fixed to the upper end of the test box 21. A pressure regulating device 35 is arranged on one side of the circulation pipe 33, and the output pipe of the pressure regulating device 35 is connected to the circulation pipe 33. By driving the clamping arc plates 31 to extend out through the two electric push rods 3, the two clamping arc plates 31 can clamp and fix the fuel pump main body 32 in the middle. Through the setting of the flow tester 34, the flow performance of the fuel pump main body 32 can be tested and processed when the device is operating.

[0030] Working principle: Before the device operates, first inject fuel into the test box 21. Observe the fuel in the test box 21 through the observation plate 22. After the impurities in the fuel settle to the bottom of the test box 21, open the valve body 25 on the oil suction pipe 23, and then start the pump body 26 to pump out the fuel and impurities at the bottom of the test box 21 by the pump body 26. When the fuel passes through the filter screen 28 in the filter box 27, the impurities inside the fuel can be filtered. The filtered fuel will flow back into the test box 21 through the output end of the return pipe 29. Observe the situation inside the test box 21 through the observation plate 22. When the impurities settled at the bottom of the fuel are cleared, close the valve body 25 and the pump body 26 on the oil suction pipe 23, and then the flow performance of the fuel pump can be tested and processed. In this way, the possibility that the impurities in the fuel will affect the test results can be maximally avoided. After the impurity removal is completed, place the fuel pump main body 32 to be tested between the two clamping arc plates 31, and then drive the clamping arc plates 31 to extend out through the two electric push rods 3, so that the two clamping arc plates 31 can clamp and fix the fuel pump main body 32 in the middle (note: after the fuel pump main body 32 is clamped, the inlet end of the fuel pump main body 32 needs to be immersed in the fuel inside the test box 21). Then start the fuel pump main body 32 to pump out the fuel inside the test box 21, and make the pumped fuel flow back into the test box 21 through the circulation pipe 33. During this process, the flow tester 34 will test the flow of the passing fuel. When it is necessary to discharge the fuel inside the test box 21, just open the valve body 25 on the drain pipe 24.

[0031] The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the present utility model is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. A fuel pump flow performance test device, comprising a test stand (1), a frame (2) fixed to the upper end of the test stand (1), a test box (21) fixed in the middle of the frame (2), a test mechanism installed inside the test box (21), characterized in that: It also includes a debris removal mechanism; The impurity removal mechanism comprises an observation plate (22), wherein the observation plate (22) is fixed to the front end surface of the test box (21); an oil extraction pipe (23) is fixed to the bottom of the test box (21); an oil discharge pipe (24) is arranged on one side of the oil extraction pipe (23), and the oil discharge pipe (24) is connected to the bottom of the test box (21); a valve body (25) is installed between the oil extraction pipe (23) and the oil discharge pipe (24); a pump body (26) is installed at the output end of the oil extraction pipe (23); a filter box (27) is fixed to the output end of the pump body (26); a filter net (28) is fixed inside the filter box (27); a return pipe (29) is fixed to the output end of the filter box (27), and the output end of the return pipe (29) extends into the test box (21).

2. A fuel pump flow performance testing device according to claim 1, characterized in that: The bottom of the test box (21) is a structure that is wide at the top and narrow at the bottom, and the observation plate (22) is made of a transparent material.

3. A fuel pump flow performance testing device according to claim 1, characterized in that: The oil extraction pipe (23), the oil discharge pipe (24) and the return pipe (29) are all hard pipes made of plastic.

4. A fuel pump flow performance testing device according to claim 1, characterized in that: The filter screen (28) is a frame-shaped structure with one end open.

5. The fuel pump flow performance testing device according to claim 1, characterized in that: The testing mechanism comprises two electric push rods (3), the two electric push rods (3) are respectively mounted at two ends of the testing box (21), and the telescopic ends of the two electric push rods (3) are arranged opposite to each other, the telescopic ends of the two electric push rods (3) are both fixed with clamping arc plates (31), a fuel pump body (32) is arranged between the two clamping arc plates (31), a flow pipe (33) is arranged at the upper end of the fuel pump body (32), and the input end of the flow pipe (33) is connected to the oil outlet end of the fuel pump body (32), a flow tester (34) is installed in the middle section of the flow pipe (33), and the shell structure of the flow tester (34) is fixed to the upper end of the testing box (21), a pressure regulating device (35) is arranged on one side of the flow pipe (33), and the output pipe of the pressure regulating device (35) is connected to the flow pipe (33).

6. A fuel pump flow performance testing device according to claim 5, characterized in that: The arc inner walls of the two clamping arc plates (31) are both provided with a rubber layer, and the output end of the flow tube (33) faces the inside of the test box (21).

Images