CN210003433U

CN210003433U - noise-reduction fuel pump

Info

Publication number: CN210003433U
Application number: CN201920810195.4U
Authority: CN
Inventors: 廖宁
Original assignee: Beijing Changcheng Huaguan Automobile Technology Development Co Ltd
Current assignee: CH Auto Technology Co Ltd; Beijing Changcheng Huaguan Automobile Technology Development Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-01-31
Anticipated expiration: 2029-05-31

Abstract

The utility model discloses an fuel pump of making an uproar falls, including air-vent valve, time oil pipe and diffraction pump, the air-vent valve through time oil pipe with the diffraction pump is connected, the utility model discloses a fuel pump of making an uproar falls has solved that the fluid flow rate is fast behind the fuel entering the diffraction pump through the air-vent valve, and frequency list to the fluid that leads to strikes great to the diffraction pump, makes the problem that the noise increases, and then has increased whole car travelling comfort.

Description

noise-reduction fuel pump

Technical Field

The utility model relates to the field of automotive technology, especially, relate to kinds of fuel pumps of making an uproar fall.

Background

Along with the higher and higher requirements of customers on the whole vehicle comfort, the whole vehicle comfort is paid more and more attention of whole vehicle factories. NVH noise in a vehicle cab is an important factor influencing driving comfort, wherein NVH noise of a fuel pump accounts for a large proportion of total noise in the vehicle cab, so that control of the NVH noise of the fuel pump by various large automobile companies is more and more strict.

Specifically, the noise of the fuel pump mainly comprises two parts, wherein is the noise generated when the pump core of the fuel pump runs, and the other part is the noise generated by the oil return system of the fuel pump, namely, the diffraction can be generated when return oil flows through a pressure regulating valve and enters a diffraction pump, so that the fuel oil in the fuel tank is sucked into the oil storage barrel of the fuel pump through the oil return system, and after the fuel oil enters an oil return pipe through the pressure regulating valve, the whole process can generate great noise because the oil return speed is high and the frequency is single , and the impact on an oil return path is great.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an kind of fuel pumps of making an uproar falls for it is very fast to solve fluid velocity of flow behind the fuel entering the diffraction pump through the air-vent valve, and frequency list , thereby the fuel that leads to strikes great to the diffraction pump, makes the problem that the noise increases.

The utility model provides a technical problem adopt following technical scheme:

noise reduction fuel pump comprises a pressure regulating valve, an oil return pipe and a diffraction pump, wherein the pressure regulating valve is connected with the diffraction pump through the oil return pipe.

, the diffraction pump comprises a left pump body, a right pump body, a drainage part, a buffer part and a pressure relief part;

the pump comprises a left pump body, a right pump body, a buffer part, a left pump body, an oil return pipe, a tubular connecting part, a second cavity, a tubular connecting part, a drainage part, a buffer part and a pressure relief part, wherein the th cavity is formed inside the left pump body, the left pump body is connected with the oil return pipe, the tubular connecting part is formed on the side wall of the right end of the left pump body, the second cavity is formed inside the right pump body, the left end of the right pump body is communicated with the left pump body through the tubular connecting part, the right end of the right pump body is formed into an oil outlet, the oil outlet is connected with the oil outlet pipe, the drainage part.

And , a sealing ring is arranged at the joint of the drainage part and the tubular connecting part.

, the second chamber has a conical shape and has a largest cross-section near the end of chamber .

And , the oil outlet of the second chamber is designed to be in a small hole structure.

, the buffer part is a spiral column structure.

The utility model has the advantages of the utility model discloses a fuel pump of making an uproar falls has solved that the fluid flow speed is fast behind the fuel gets into the diffraction pump through the air-vent valve, and frequency list to the fluid that leads to strikes great to the diffraction pump, makes the problem that the noise increases, and then has increased whole car travelling comfort.

Drawings

Fig. 1 is a schematic diagram of an overall structure of a noise reduction fuel pump according to the present invention;

FIG. 2 is a schematic view illustrating a flow direction of a fuel passage of the noise reduction fuel pump according to the present invention;

FIG. 3 is a top view of the noise reducing fuel pump of the present invention;

fig. 4 is a sectional view of the noise reduction fuel pump of the present invention taken along the line a-a.

The notation in the figures means: 1-a pressure regulating valve; 2-an oil return pipe; 3-a diffraction pump; 4-left pump body; 5-right pump body; 6-a drainage part; 7-a buffer member; 8-a pressure relief portion; 9-a tubular connection; 10-oil outlet pipe.

Detailed Description

The technical solution of the present invention is further illustrated in steps by referring to the following embodiments and the accompanying drawings.

Example 1

The embodiment provides kinds of fuel pumps that make an uproar falls for it is faster to solve the fluid velocity of flow after fuel gets into the diffraction pump through the pressure-regulating valve, and frequency list to the fuel that leads to is great to the impact of diffraction pump, makes the problem of noise increase.

As shown in figure 1, the noise reduction fuel pump comprises a pressure regulating valve 1, an oil return pipe 2 and a diffraction pump 3, wherein the pressure regulating valve 1 is connected with the diffraction pump 3 through the oil return pipe 2.

The diffraction pump 3 comprises a left pump body 4, a right pump body 5, a drainage part 6, a buffer part 7 and a pressure relief part 8, wherein a -th cavity is formed inside the left pump body 4, the left pump body 4 is connected with an oil return pipe 2 to enable fuel oil to flow into a -th cavity, a tubular connecting part 9 is formed on the side wall of the right end of the left pump body 4, a second cavity is formed inside the right pump body 5, the left end of the right pump body 5 is communicated with the left pump body 4 through the tubular connecting part 9, the right end of the right pump body 5 is formed into an oil outlet, the oil outlet is connected with the oil outlet pipe 10, the drainage part 6 is formed into a tubular shape, is arranged in the left pump body 4 and connected with the tubular connecting part 9 and used for draining the fuel oil in a -th cavity, the buffer part 7 is arranged in the tubular connecting part 9, and the pressure relief part 8 is located on.

In the embodiment of the present invention, a sealing ring is disposed at the connection between the drainage portion 6 and the tubular connection portion 9, and the sealing ring is used for preventing oil from leaking; the second cavity of the right pump body 5 is in a conical structure, and the cross-sectional area of the leftmost end of the second cavity is the largest; the right pump body 5 has a buffering effect on high-speed oil by reducing the diameter of the oil passage so as to achieve the purpose of reducing noise; an oil outlet at the right end of the right pump body 5 is designed to be of a small hole structure, so that the flow rate and frequency of oil can be changed, and the noise is reduced; the pressure relief part 8 is used for preventing the pressure in the diffraction pump 3 from being too high, so that the problems of too high oil return back pressure caused by the too high pressure and pressure deviation of the pressure regulating valve 1 caused by the too high oil return back pressure are avoided; the buffer member 7 is of a spiral column structure, can reduce the flow rate of oil and change the flow frequency of fuel oil, and slows down the impact on the diffraction pump 3 so as to achieve the purpose of reducing noise.

In addition , the oil flows out from the diffraction pump 3 and flows into the oil storage barrel through the oil outlet pipe 10, and a cap structure is designed on the oil outlet pipe 10 and is used for preventing the oil from being sprayed to the outside of the oil storage barrel, so that the problem of insufficient oil storage of the oil storage barrel occurs.

The sequence of the above embodiments is only for convenience of description and does not represent the advantages and disadvantages of the embodiments.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

The noise reduction fuel pump is characterized by comprising a pressure regulating valve, an oil return pipe and a diffraction pump, wherein the pressure regulating valve is connected with the diffraction pump through the oil return pipe.
2. The noise reducing fuel pump of claim 1, wherein the diffraction pump includes a left pump body, a right pump body, a flow diverter, a buffer, and a relief;

the pump comprises a left pump body, a right pump body, a buffer part, a left pump body, an oil return pipe, a tubular connecting part, a second cavity, a tubular connecting part, a drainage part, a buffer part and a pressure relief part, wherein the th cavity is formed inside the left pump body, the left pump body is connected with the oil return pipe, the tubular connecting part is formed on the side wall of the right end of the left pump body, the second cavity is formed inside the right pump body, the left end of the right pump body is communicated with the left pump body through the tubular connecting part, the right end of the right pump body is formed into an oil outlet, the oil outlet is connected with the oil outlet pipe, the drainage part.
3. The noise reducing fuel pump of claim 2, wherein a seal ring is disposed at a junction of the flow-inducing portion and the tubular connecting portion.
4. The noise reducing fuel pump of claim 2, wherein the second chamber is conical in configuration and has a largest cross-section proximate an end of the -th chamber .
5. The noise reducing fuel pump of claim 2, wherein the second chamber outlet is configured as an orifice structure.
6. The noise reducing fuel pump of claim 2, wherein the bumper is of a spiral post construction.