CN111794887B

CN111794887B - High pressure pump

Info

Publication number: CN111794887B
Application number: CN201910275952.7A
Authority: CN
Inventors: 王永涛
Original assignee: Vitesco Automotive Changchun Co Ltd
Current assignee: Vitesco Automotive Changchun Co Ltd
Priority date: 2019-04-08
Filing date: 2019-04-08
Publication date: 2022-04-12
Anticipated expiration: 2039-04-08
Also published as: CN111794887A

Abstract

The invention provides a high-pressure pump, which comprises a main body part and an oil outlet valve arranged on the main body part. The oil outlet valve comprises an oil outlet pipe, a valve seat, an elastic piece and a thrust piece, the oil outlet pipe is provided with an oil outlet hole, and the valve seat, the elastic piece and the thrust piece are arranged in the oil outlet hole. The thrust piece is fixed to the oil outlet, and the elastic piece is arranged between the valve seat and the thrust piece. The thrust piece is arranged on the outer side of the valve seat. When fuel oil does not exist, the valve seat enables the oil outlet valve to be in a closed state under the action of the elastic force of the elastic sheet; when the pressure of the fuel oil measured in the valve seat is larger than the elastic force of the elastic piece, the valve seat moves outwards, and the oil outlet valve is opened; when the pressure of the fuel oil measured in the valve seat is smaller than the elastic force of the elastic piece, the oil outlet valve is closed. The oil outlet valve of the high-pressure pump has a simple structure and is convenient to assemble.

Description

High pressure pump

Technical Field

The present invention relates to a high-pressure pump, and more particularly to a high-pressure pump for delivering fuel.

Background

The high pressure pump includes a pump chamber and a piston disposed in the pump chamber and capable of reciprocating. The high-pressure pump is also provided with an oil outlet valve, and the pressurized fuel flows out of the oil outlet valve under the action of the piston.

Chinese patent publication No. CN102287304A discloses a high pressure pump provided with an oil outlet valve. The oil outlet valve comprises an oil outlet pipe, a valve seat, a spring, a ball valve and a thrust piece. Since there are many parts, it is troublesome to assemble the parts. Meanwhile, the oil outlet pipe is directly fixed on the main body part of the high-pressure pump, and the valve seat, the spring, the ball valve and the thrust piece are assembled on the main body part of the high-pressure pump, so that the assembly difficulty of the high-pressure pump is increased.

Disclosure of Invention

The invention aims to provide a high-pressure pump with an oil outlet valve, which is simple to assemble.

According to one aspect of the present invention, there is provided a high pressure pump including a main body portion and an oil outlet valve provided to the main body portion. The oil outlet valve comprises an oil outlet pipe, a valve seat, an elastic piece and a thrust piece, the oil outlet pipe is provided with an oil outlet hole, and the valve seat, the elastic piece and the thrust piece are arranged in the oil outlet hole. The thrust piece is fixed to the oil outlet, and the elastic piece is arranged between the valve seat and the thrust piece. The thrust piece is arranged on the outer side of the valve seat. When fuel oil does not exist, the valve seat enables the oil outlet valve to be in a closed state under the action of the elastic force of the elastic piece; when the pressure of the fuel oil measured in the valve seat is larger than the elastic force of the elastic piece, the valve seat moves outwards, and the oil outlet valve is opened; when the pressure of the fuel oil measured in the valve seat is smaller than the elastic force of the elastic piece, the oil outlet valve is closed.

Preferably, the oil outlet is equipped with the guide part that sets up and play the guide effect to the disk seat with the disk seat clearance, is located the first district section of guide part internal survey and is located the second district section in the guide part outside, the oil outlet still is equipped with and is connected and than the guide part recess that the outside was sunken, the disk seat is equipped with the tip, the lateral wall that links to each other with the tip and locates the through-hole of lateral wall, the disk seat still is equipped with one end and is connected with the second district section, the drain hole that the other end passes through-hole and external connection, when the oil valve is opened, form a passageway of being connected recess and first district section between disk seat and the oil pipe, the through-hole overlaps with the recess at least partially, the drain hole passes through hole and recess intercommunication.

Preferably, the guide part comprises a first guide part arranged on one side of the groove and a second guide part arranged on the other side of the groove.

Preferably, the oil outlet pipe is provided with a sealing surface which is positioned at the oil outlet hole and is obliquely arranged, the end part of the valve seat is provided with an end surface which is matched with the sealing surface and is obliquely arranged, and the end surface of the valve seat is abutted against the sealing surface so as to close the oil outlet valve.

Preferably, when the outlet valve is opened, the upper fixed point of the end surface of the valve seat is located at the groove.

Preferably, the groove is an annular groove, and the surface of the groove is vertical to the central axis of the oil outlet valve.

Preferably, the number of the through holes is at least two, and the through holes are uniformly distributed on the side wall.

Preferably, the thrust piece is fixed in the oil outlet hole in a threaded or interference fit mode, and the thrust piece is provided with a central hole.

Preferably, the elastic member is a spring.

Preferably, the oil outlet is in a stepped cylindrical shape.

The oil outlet valve of the high-pressure pump is formed by four components, namely the oil outlet pipe, the valve seat, the elastic part and the thrust part, so that the number of parts is reduced, and the assembly difficulty is reduced.

Drawings

FIG. 1 is a partially exploded perspective view of the high pressure pump of the present invention.

Fig. 2 is an exploded view of the delivery valve.

FIG. 3 is a perspective view of the flowline.

Fig. 4 is a perspective view of the valve seat.

Fig. 5 is a perspective view of the stopper.

Fig. 6 is a partial sectional view of the delivery valve of the high pressure pump of the present invention when closed.

Fig. 7 is a partial sectional view of the delivery valve of the high pressure pump of the present invention when open.

Detailed Description

Referring to fig. 1, the present invention discloses a high pressure pump 100, which includes a main body 2, an electromagnetic valve 3 disposed on the main body 2, and an oil outlet valve 1 disposed on the main body 2. The electromagnetic valve 3 is used for controlling the opening and closing of the oil inlet valve.

As further shown in fig. 2 to 5, the oil outlet valve 1 includes an oil outlet pipe 11, a valve seat 12, an elastic member 13, and a thrust member 14. The oil outlet pipe 11 is provided with an oil outlet hole 115, and the valve seat 12, the elastic member 13, and the thrust member 14 are provided in the oil outlet hole 11). The thrust member 14 is fixed to the oil outlet hole 115. The elastic member 13 is provided between the valve seat 12 and the thrust member 14, and the thrust member 14 is provided outside the valve seat 12. In the present invention, the thrust member 14 being provided outside the valve seat 12 means that the valve seat 12 is closer to a pump chamber (not shown) of the high-pressure pump 100 than the thrust member 14.

When there is no fuel, the valve seat 12 makes the delivery valve 1 in the closed state by the elastic force of the elastic member 13; when the pressure of the fuel oil measured in the valve seat 12 is larger than the elastic force of the elastic part 13, the valve seat 12 moves outwards, and the oil outlet valve 1 is opened; when the pressure of the fuel measured in the valve seat 12 is smaller than the elastic force of the elastic member 13, the delivery valve 1 is closed. The high-pressure pump 100 of the present invention can control the opening and closing of the delivery valve 1, and at the same time, reduce the number of parts and reduce the difficulty of assembling the delivery valve 1.

The flowline 11 includes a main body portion 111, a first extension portion 112 extending forwardly from the base portion 111, and a second extension portion 113 extending rearwardly from the base portion 111. The oil outlet hole 115 penetrates the oil outlet pipe 11. The oil outlet hole 115 is provided with a guide portion 1151 which is provided with a clearance from the valve seat 12 and guides the valve seat 12, a first section 1152 which is located on the inner side of the guide portion 1151, and a second section 1153 which is located on the outer side of the guide portion 1153. The inner side and the outer side are defined with respect to the main body 2, and the inner side closer to the main body 2 than the guide portion 1151 is referred to as the inner side, and the outer side farther from the main body 2 than the guide portion 1151 is. The oil outlet hole 115 is further provided with a third section 1154, the third section 1154 is provided with threads, and the thrust block 14 is fixed to the third section 1154 by means of a threaded connection. The thrust member 14 may also be secured to the third section 1154 by other means, such as an interference fit.

The oil outlet hole 115 is also provided with a groove 116 connected to the guide portion 1151 and recessed outward from the guide portion 1151. The outer side here is defined with respect to the center axis L of the outlet valve 1, and the outer side here is away from the center axis L. The guide portion 1151 includes a first guide portion 11511 provided at one side of the groove 116 and a second guide portion 11512 provided at the other side of the groove 116. Although a gap is provided between the guide portion 1151 and the valve seat 12, the gap mainly plays a role of guiding. Sometimes there may be only one of the first guide portion 11511 and the second guide portion 11512 for the purpose of processing. The groove 116 is an annular groove, and the surface of the groove 116 is perpendicular to the central axis L of the oil outlet valve 1. In other embodiments, the recess 116 may be provided in other shapes. The oil outlet pipe 11 is provided with an obliquely arranged sealing surface 1155 at the oil outlet hole 115. The oil outlet hole 115 is stepped cylindrical.

The valve seat 12 has an end 124, a sidewall 123 connected to the end 124, and a through hole 121 formed in the sidewall 123, and the valve seat 12 further has a liquid guide hole 122 having one end connected to the second section 1153 and the other end connected to the outside through the through hole 121. The end 124 of the valve seat 12 is provided with an end surface 125 which is engaged with the sealing surface 1155 and is disposed obliquely, and the end surface 125 of the valve seat 12 interferes with the sealing surface 1155 to close the outlet valve 1. The number of the through holes 121 is at least two, and the through holes are uniformly distributed on the side wall 123. In the present embodiment, the through holes 121 are provided in four.

The thrust member 14 is fixed to the oil outlet hole 115 by means of a threaded connection, and the thrust member 14 is provided with a center hole 142. The thrust member 14 includes a fixing portion 141 and a protrusion 143 formed to extend forward from the fixing portion 141. The center hole 142 penetrates the fixing portion 141 and the protruding portion 143. The fixing portion 141 cooperates with the third section 1154 to fix the thrust member 14 within the oil outlet hole 115.

The elastic member 13 is a spring. In other embodiments, the elastic member 13 may be another elastic member. When the elastic member 13 is a spring, the hole of the elastic member is caught on the protrusion 143.

Referring further to fig. 6 and 7, when the outlet valve 1 is open, the valve seat 12 is in the first position 6. The upper set point 1251 of the end surface 125 of the valve seat 12 is located at the recess 116. The valve seat 12 and the flow line 11 form a passage 4 connecting the groove 116 and the first section 1152, the through hole 121 is at least partially overlapped with the groove 116, and the fluid guide hole 122 is communicated with the groove 116 through the through hole 121. The fuel at the first section 1152 flows into the groove 116 through the passage 4, then flows into the drain hole 122 through the through hole 121, then flows into the center hole 142, and finally flows out of the second section 1153.

When the delivery valve 1 is closed, the valve seat 12 is now in the second position 5. Under the elastic force of the elastic member 13, the end surface 125 of the valve seat 12 collides with the sealing surface 1155 to close the outlet valve 1. Preferably, the end surface 125 of the valve seat 12 and the sealing surface 1155 are conical surfaces.

It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. A high-pressure pump comprises a main body part (2) and an oil outlet valve (1) arranged on the main body part (2), and is characterized in that the oil outlet valve (1) comprises an oil outlet pipe (11), a valve seat (12), an elastic piece (13) and a thrust piece (14), the oil outlet pipe (11) is provided with an oil outlet hole (115), the valve seat (12), the elastic piece (13) and the thrust piece (14) are arranged in the oil outlet hole (115), the thrust piece (14) is fixed to the oil outlet hole (115), the oil outlet hole (115) is provided with a guide part (1151) which is arranged in a gap with the valve seat (12) and plays a guiding role on the valve seat (12), a first section (1152) which is arranged in the guide part (1151) and a second section (1153) which is arranged outside the guide part (1151), the oil outlet hole (115) is further provided with a groove (116) which is connected with the guide part (1151) and is recessed to the outside than the guide part (1151), the oil outlet valve is characterized in that the valve seat (12) is provided with an end part (124), a side wall (123) connected with the end part (124) and a through hole (121) arranged on the side wall (123), the valve seat (12) is further provided with a liquid guide hole (122) with one end connected with the second section (1153) and the other end connected with the outside through the through hole (121), when the oil outlet valve (1) is opened, a channel (4) connecting the groove (116) with the first section (1152) is formed between the valve seat (12) and the oil outlet pipe (11), the through hole (121) is at least partially overlapped with the groove (116), the liquid guide hole (122) is communicated with the groove (116) through the through hole (121), the oil outlet pipe (11) is provided with an obliquely arranged sealing surface (1155) positioned at the oil outlet hole (115), the end part (124) of the valve seat (12) is provided with an end surface (125) matched with the sealing surface (1155) and obliquely arranged, the end surface (125) of the valve seat (12) is abutted against the sealing surface (1155) so as to close the oil outlet valve (1), the elastic member (13) is arranged between the valve seat (12) and the thrust member (14), the thrust member (14) is arranged on the outer side of the valve seat (12), and the valve seat (12) enables the oil outlet valve (1) to be in a closed state under the action of the elastic force of the elastic member (13) when fuel is not supplied; when the pressure of the fuel oil measured in the valve seat (12) is larger than the elastic force of the elastic part (13), the valve seat (12) moves outwards, and the oil outlet valve (1) is opened; when the pressure of the fuel measured in the valve seat (12) is smaller than the elastic force of the elastic member (13), the delivery valve (1) is closed.

2. The high-pressure pump according to claim 1, characterized in that the upper set point (1251) of the end surface (125) of the valve seat (12) is located at the groove (116) when the delivery valve (1) is opened.

3. The high-pressure pump according to claim 1, characterized in that the groove (116) is an annular groove, and the surface of the groove (116) is perpendicular to the central axis of the delivery valve (1).

4. The high-pressure pump according to claim 1, characterized in that the through-holes (121) are at least two and are evenly distributed over the side wall (123).

5. The high pressure pump of claim 1, wherein the thrust piece (14) is secured within the oil outlet bore (115) by a threaded connection or an interference fit, the thrust piece (14) being provided with a central bore (142).

6. The high-pressure pump as claimed in claim 1, characterized in that the elastic element (13) is a spring.

7. The high pressure pump according to claim 1, wherein the oil outlet hole (115) is stepped cylindrical.