CN210217972U

CN210217972U - VE distribution pump damping delivery valve

Info

Publication number: CN210217972U
Application number: CN201920808883.7U
Authority: CN
Inventors: Guowei Wu; 吴国伟; Zhenting Zhang; 张振廷
Original assignee: Nanjing Weifu Jinning Coltd
Current assignee: Nanjing Weifu Jinning Coltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-03-31
Anticipated expiration: 2029-05-31

Abstract

The utility model discloses a VE distribution pump damping oil outlet valve, including the tight seat of pipy oil outlet valve, the tight seat outside of oil outlet valve has protrudingly, and the tight seat tip of oil outlet valve has the step hole, and the downthehole case that is provided with of step, step hole opening part connect the disk seat that produces oil through the jump ring, and the disk seat center that produces oil has the perforating hole, the case includes the columnar core, core one end center is provided with the guiding hole, guiding hole bottom center is provided with the throttle aperture that link up, the guiding hole root evenly is provided with round oil duct hole, oil duct hole link up the core lateral wall, be provided with the spring in the guiding hole, the tight seat tip step hole bottom of spring end contact oil outlet valve, the disk seat that produces oil is located the terminal surface in the step hole is hugged closely. The oil outlet valve does not need a pressing limiter, greatly reduces the processing difficulty and the assembling steps, improves the production efficiency and reduces the manufacturing cost.

Description

VE distribution pump damping delivery valve

Technical Field

The utility model relates to a fuel pump equipment technical field, concretely relates to VE distribution pump damping delivery valve.

Background

In the VE pump fuel oil system, an oil outlet valve is arranged between an oil pump and a high-pressure oil pipe. The oil outlet valve is similar to a one-way valve in function, when the oil pump supplies oil, the oil outlet valve is opened in the positive direction, the oil pump supplies oil to the high-pressure oil pipe, and the pressure at the end of the oil sprayer rises rapidly and oil injection begins. When the oil supply is finished, the valve core of the oil outlet valve is seated, and meanwhile, the high-pressure oil pipe is ensured to participate in rapid pressure reduction, so that the rapid closing of the oil injector is realized, and the oil injection is stopped.

The existing direct injection engine VE pump is commonly provided with a damping oil outlet valve, a valve core and a limiter are arranged in a valve seat, and the limiter is in interference fit with the valve seat and is pressed through equipment such as a press machine. The oil outlet valve has the advantages of small size, small diameter of the stopper, tight fit, high processing requirement, high production difficulty, low yield and high manufacturing cost, and meanwhile, the pressing operation needs to be carried out by using pressing equipment, positioning tools and the like in the processing process.

Disclosure of Invention

The utility model provides a to above-mentioned defect, provide a VE distribution pump damping delivery valve, its concrete technical scheme as follows:

the utility model provides a VE distribution pump damping delivery valve, includes the tight seat of pipy delivery valve, and the tight seat outside of delivery valve has protrudingly, and the tight seat tip of delivery valve has the step hole, and the downthehole case that is provided with of step, step hole opening part connect the delivery valve seat through the jump ring, and delivery valve seat center has the perforating hole, the case includes cylindrical core, core one end center is provided with the guiding hole, guiding hole bottom center is provided with the throttle aperture that link up, the guiding hole root evenly is provided with round oil duct hole, oil duct hole link up the core lateral wall, be provided with the spring in the guiding hole, the tight seat tip step hole bottom of spring end contact delivery valve, the valve core terminal surface is hugged closely under the spring action and is delivered the valve seat and is located the terminal.

As an improvement of the scheme, the length of the valve core is shorter than the distance from the bottom surface of the stepped hole of the oil outlet valve tight seat to the inner end surface of the oil outlet valve seat in the stepped hole.

As an improvement of the scheme, the opening of the throttling small hole at the end part of the valve core is a horn mouth.

As an improvement of the scheme, the end face of the valve core is provided with a chamfer or a rounding, and the opening of the valve core guide hole is provided with a chamfer or a rounding.

As a improvement of the scheme, the number of the oil passage holes is 4.

Compared with the prior art, the utility model adopts the above technical scheme, the technical effect who has is:

1. the valve core of the VE distribution pump damping oil outlet valve disclosed by the utility model is directly arranged in the oil outlet valve tightening seat, and a pressing limiter is not needed like the traditional oil outlet valve, so that the processing difficulty and the assembling steps are greatly reduced, the production efficiency is improved, and the manufacturing cost is reduced;

2. the utility model discloses a VE distribution pump damping goes out oil valve, its case is longer for traditional play oil valve case length, in the tight seat of play oil valve, case itself has the guide effect, and during the pilot hole in the case was arranged in to the spring simultaneously, guaranteed that the case can not take place the skew in the use, reduceed service failure.

3. The utility model discloses a VE distribution pump damping goes out oil valve constitutes the fuel oil circuit through the oil duct hole that the case lateral wall evenly set up and the interior guiding hole of case, compares in traditional play oil valve, and whole oil circuit is more unobstructed, and it is littleer to fire oil flow and hinder.

Drawings

FIG. 1 is a schematic view of the VE dispensing pump damping delivery valve structure;

FIG. 2 is a schematic structural diagram of the open state of the damping oil outlet valve of the VE distribution pump;

FIG. 3 is a schematic view of the valve core structure;

reference numerals: 1. an oil outlet valve seat; 2. a clamp spring; 3. a valve core; 4. a spring; 5. the oil outlet valve is tightly seated; 301. a core body; 302. a sealing surface; 303. a small orifice; 304. an oil passage hole; 305. a guide hole; 306. and a spring seat surface.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout.

Fig. 1 shows a VE dispensing pump damping outlet valve, which comprises a tubular outlet valve retainer 5, wherein the outlet valve retainer 5 is externally provided with a protrusion for connecting with a pump body. The end part of the oil outlet valve tight seat 5 is provided with a step hole, a valve core 3 is arranged in the step hole, the opening of the step hole is connected with an oil outlet valve seat 1 through a clamp spring 2, and the center of the oil outlet valve seat 1 is provided with a through hole.

As shown in fig. 3, the valve body 3 includes a columnar core body 301, a guide hole 305 is provided at the center of one end of the core body 301, a through small throttle hole 303 is provided at the center of the bottom of the guide hole 305, four oil passage holes 304 are uniformly provided at the root of the guide hole 305, and the oil passage holes 304 penetrate through the side wall of the core body 301. The guide hole 305 is internally provided with a spring 4, one end of the spring 4 is contacted with the bottom of the stepped hole at the end part of the oil outlet valve fastening seat 5, and the other end is contacted with a spring seat surface 306 at the bottom of the guide hole 305. The end face of the valve core 3 is tightly attached to the oil outlet valve seat 1 under the action of the spring 4 and is positioned on the inner end face of the stepped hole. The length of the valve core 3 is shorter than the distance from the bottom surface of the step hole of the oil outlet valve tight seat 5 to the inner end surface of the step hole of the oil outlet valve seat 1. The opening of the throttling small hole 303 at the end part of the valve core 3 is a horn mouth. The end face of the valve core 3 is provided with a chamfer, and the opening of the guide hole 305 of the valve core 3 is provided with a chamfer.

As shown in fig. 2, in the open state of the oil outlet valve, when the oil pump supplies oil, the valve core 3 overcomes the force of the spring 4 to move upwards until the opening section of the guide opening of the valve core 3 contacts the bottom surface of the step hole of the oil outlet valve fastening seat 5, at this time, the sealing surface 302 between the valve core 3 and the oil outlet valve seat 1 is opened, and high-pressure fuel flows into the step hole annular belt part of the oil outlet valve fastening seat 5 through the gap between the sealing surface 302 and the end surface of the oil outlet valve seat 1, flows into the guide hole 305 through the four oil passage holes 304 on the valve core 3, and finally flows to the high-pressure oil pipe; when the oil supply is finished, as shown in fig. 1, under the action of the force of the spring 4, the valve core 3 moves downwards, and the end sealing surface 302 of the valve core is tightly attached to the section of the oil outlet valve seat 1 to realize sealing. At this time, the residual pressure in the high-pressure oil pipe is relieved through a small throttling hole 303 in the valve core 3.

The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention.

Claims

1. The utility model provides a VE distribution pump damping delivery valve, includes the tight seat of pipy delivery valve, and the tight seat outside of delivery valve has protrudingly, and the tight seat tip of delivery valve has the step hole, and the downthehole case that is provided with of step, step hole opening part connect the delivery valve seat through the jump ring, and delivery valve seat center has the perforating hole, its characterized in that, the case includes the columnar core, core one end center is provided with the guiding hole, guiding hole bottom center is provided with the throttle aperture that link up, the guiding hole root evenly is provided with round oil duct hole, oil duct hole link up the core lateral wall, be provided with the spring in the guiding hole, the tight seat tip step hole bottom of spring end contact delivery valve, the case terminal surface is hugged closely the delivery valve seat and is located the terminal surface in the step hole.

2. The VE dispensing pump damping oil outlet valve according to claim 1, wherein the spool length is shorter than the distance from the bottom surface of the stepped bore of the outlet valve seating to the inner end surface of the stepped bore of the outlet valve seating.

3. The VE dispensing pump damping delivery valve of claim 2, wherein the spool end throttling orifice opening is flared.

4. A VE dispensing pump damping delivery valve according to claim 1, 2 or 3, characterized in that the spool end face has a chamfer or radius and the spool pilot hole opening has a chamfer or radius.

5. A VE dispensing pump damping delivery valve according to claim 1, 2 or 3, characterised in that said oil passage aperture is 4.