CN219317073U

CN219317073U - Pump body structure of fuel pump

Info

Publication number: CN219317073U
Application number: CN202320719852.0U
Authority: CN
Inventors: 谯登江; 郑荣标; 谯丹; 薛海靖
Original assignee: Wenzhou Tianqi Auto Parts Co ltd
Current assignee: Wenzhou Tianqi Auto Parts Co ltd
Priority date: 2023-04-04
Filing date: 2023-04-04
Publication date: 2023-07-07
Anticipated expiration: 2033-04-04

Abstract

The utility model discloses a pump body structure of a fuel pump, which comprises a shell, wherein an outer ring is arranged in the shell, an inner hole of the outer ring is provided with a rotor groove, the bottom of the rotor groove is provided with an oil inlet, the outer wall of the outer ring is locally provided with oil outlet holes which are distributed in sequence, an inner rotor is eccentrically arranged in the rotor groove, the outer peripheral wall of the inner rotor is uniformly provided with strip-shaped grooves, the strip-shaped grooves are arranged along the diameter direction of the inner rotor, blades sliding along the strip-shaped grooves are arranged in the strip-shaped grooves, and the blades are square. Thus, the technical effects of reliable structure and stable performance are achieved.

Description

Pump body structure of fuel pump

Technical Field

The utility model relates to an automobile fuel pump, in particular to a fuel pump body structure.

Background

The pump body structure of the traditional fuel pump comprises a pump body, a motor and a shell. The motor is electrified to drive the pump body to rotate, so that fuel is sucked from the oil inlet, flows through the inside of the electric fuel pump, and is pressed out from the oil outlet to supply oil to the fuel system.

The general pump body structure is the impeller, causes vacuum low pressure in the oil inlet part in the high-speed rotation process of the impeller, and then inhales the fuel oil through the oil inlet of pump cover, and the inhaled fuel oil gets into the inside of pump shell after the pressurization of fuel pump impeller and then is pressed out through the oil-out, provides the fuel that possesses certain pressure for fuel system, and the impeller of general pump body structure is difficult to control owing to the clearance between the impeller and the pump body inner wall, and the structure is unreliable, can produce great noise in the rotation process, and the performance is difficult to guarantee.

Disclosure of Invention

In order to solve the problems, the utility model aims to provide a fuel pump body structure which is reliable in structure, low in noise and stable in performance.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a fuel pump body structure, includes the casing in install the outer lane, the hole of outer lane is provided with the rotor groove open the bottom in rotor groove has the inlet port, the outer wall part of outer lane is equipped with the oil outlet that distributes in proper order the inner rotor is installed to the rotor inslot decentered, the outer perisporium equipartition of inner rotor has the bar groove, the bar groove is followed the diameter direction setting of inner rotor install along its gliding blade in the bar groove, the blade is the square form.

The minimum clearance between the inner rotor and the inner wall of the outer ring is between 0.05mm and 0.1 and mm.

The bottom of the strip-shaped groove is convexly provided with a jacking-open lug.

The outer wall of outer lane is equipped with curved oil groove, and the bottom of this oil groove is the arc, the oil groove corresponds to outer lane tangential side wall on set up the oil outlet.

The structure of the utility model has low manufacturing cost, the fit clearance between the inner rotor and the pump body is automatically ensured after the machining, the clearance is not required to be manually adjusted during the assembly, the assembly efficiency is high, the noise is low, the product performance consistency is good, and the technical effects of reliable structure and stable performance are achieved.

The utility model is further described below with reference to the drawings and detailed description.

Drawings

FIG. 1 is a block diagram of a specific embodiment of the present utility model;

FIG. 2 is a diagram showing the fit of the outer race and the inner rotor in accordance with an embodiment of the present utility model;

fig. 3 is a perspective view of an outer race in accordance with an embodiment of the present utility model.

Detailed Description

The present utility model is described in detail below by way of examples only for further explanation of the present utility model and is not to be construed as limiting the scope of the present utility model.

As shown in fig. 1-3, the present embodiment discloses a pump body structure of a fuel pump, which comprises a housing 1, and an oil outlet pipe 10 is installed on the housing. The inner ring 2 is arranged in the shell 1, the inner hole of the outer ring 2 is provided with a rotor groove 21, the bottom of the rotor groove 21 is provided with an oil inlet hole 210, the outer wall part of the outer ring 2 is provided with oil outlet holes 22 which are distributed in sequence, the inner rotor 3 is eccentrically arranged in the rotor groove 21, the inner rotor 3 is driven by the motor 4, the outer peripheral wall of the inner rotor 3 is uniformly provided with strip grooves 31, the strip grooves correspond to the oil outlet holes in position, the strip grooves 31 are arranged along the diameter direction of the inner rotor 3, the strip grooves 31 are internally provided with blades 5 sliding along the strip grooves, the blades 5 are square, after the motor 4 drives the inner rotor 3 to rotate, the blades 5 in the strip grooves 31 outwards move under the action of centrifugal force and abut against the inner wall of the outer ring 2, and as the inner rotor 3 is eccentrically arranged in the rotor groove 21, when the blades 5 rotate to the gap between the inner wall of the outer ring 2 and the inner rotor 3, larger vacuum low pressure can be generated, so that the oil inlet holes 210 at the bottom of the rotor groove 21 suck fuel and the fuel along with the rotation of the inner rotor 3, and the blades 5 are discharged from the positions of the oil outlet holes 22.

The end faces of the blades 5 facing the inner wall of the outer ring 2 are arc-shaped, so that the blades 5 are placed in the strip-shaped grooves 31 and form a whole with the same radian with the outer wall of the rotor.

The minimum clearance between the inner rotor 3 and the inner wall of the outer ring 2 is between 0.05mm and 0.1 and mm. The gap can ensure that the inner rotor 3 can not generate larger noise in the rotating process, and meanwhile, when the blade 5 scrapes the minimum gap position from the position with large gap, larger vacuum pressure difference can be generated, so that the fuel output efficiency is improved.

The bottom of the bar-shaped groove 31 is convexly provided with a jacking-up bump 310. The ejector projection 310 can prevent the end face of the blade 5 from being attached to the bottom face of the bar-shaped groove 31 in vacuum, thereby affecting the movement of the blade 5.

An arc-shaped oil outlet groove 23 is formed in the outer wall of the outer ring 2, the bottom of the oil outlet groove 23 is arc-shaped, one end of the arc-shaped oil outlet groove 23 is connected with one end of an opening of the oil outlet groove 23, and an oil outlet hole 22 is formed in the side wall, corresponding to the tangential direction of the outer ring 2, of the oil outlet groove 23. By the structure, when the blade 5 scrapes fuel, the fuel can be timely discharged from the oil outlet 22, and the fuel output efficiency is further improved.

By adopting the technical scheme, the structure is low in manufacturing cost, the fit clearance between the inner rotor 3 and the pump body is automatically ensured after the inner rotor and the pump body are machined, manual clearance adjustment is not needed during assembly, the assembly efficiency is high, the noise is low, the product performance consistency is good, and the technical effects of reliable structure and stable performance are achieved.

Claims

1. The utility model provides a fuel pump body structure, includes casing, its characterized in that: the shell in install the outer lane, the hole of outer lane is provided with the rotor groove the inlet port is opened to the bottom of rotor groove, the outer wall part of outer lane is equipped with the oil outlet hole that distributes in proper order the inner rotor is installed to the rotor inslot eccentrically, the outer perisporium equipartition of inner rotor has the bar groove, the bar groove is followed the diameter direction setting of inner rotor install along its gliding blade in the bar groove, the blade is the square form.

2. The fuel pump body structure of claim 1, wherein: the minimum clearance between the inner rotor and the inner wall of the outer ring is between 0.05mm and 0.1 and mm.

3. The fuel pump body structure of claim 1, wherein: the bottom of the strip-shaped groove is convexly provided with a jacking-open lug.

4. The fuel pump body structure of claim 1, wherein: the outer wall of outer lane is equipped with curved oil outlet groove, and the bottom of this oil outlet groove is the arc, set up on the lateral wall of oil outlet groove the oil outlet hole.