CN215256549U

CN215256549U - Prevent injection pump plunger bushing of plunger jamming

Info

Publication number: CN215256549U
Application number: CN202121016545.3U
Authority: CN
Inventors: 胡燚
Original assignee: Haiyan Fubang Machinery Co ltd
Current assignee: Haiyan Fubang Machinery Co ltd
Priority date: 2021-05-12
Filing date: 2021-05-12
Publication date: 2021-12-21
Anticipated expiration: 2031-05-12

Abstract

The utility model discloses a prevent injection pump plunger bushing of plunger jamming, including the plunger bushing body, this internal metal covering that is equipped with of plunger bushing, be equipped with the through-hole group that a plurality of intervals set up on the lateral wall of metal covering, the through-hole group comprises a plurality of through-holes that are circumference form interval setting, and the through-hole of two adjacent through-hole groups from top to bottom is crisscross to be set up, all be equipped with the solid lubricating body in the through-hole, the lubricated total area of all solid lubricating bodies accounts for 20 ~ 40% of the area of the inner circle face of the metal covering, compares with prior art, can avoid plunger jamming phenomenon, increase of service life.

Description

Prevent injection pump plunger bushing of plunger jamming

[ technical field ] A method for producing a semiconductor device

The utility model relates to a technical field of plunger bushing, especially a prevent injection pump plunger bushing's of plunger jamming technical field.

[ background of the invention ]

The plunger and barrel of the fuel injection pump is one of three precise parts of diesel engine fuel system, and the plunger reciprocates in the plunger and barrel at high speed under the action of the cam of the fuel pump to pressurize fuel to certain pressure and start to press or drain fuel in set time. The oil supply system of the diesel engine is called a high-pressure oil pump and a fuel injector. The power comes from the engine itself. The oil suction and pressing of the injection pump are completed by the reciprocating motion of the plunger in the plunger sleeve. At present, under the assembly pressure of a plunger sleeve, the plunger often causes the phenomenon of plunger clamping stagnation after being used for a long time, and the service life is short.

[ Utility model ] content

The utility model aims at solving the problem among the prior art, providing a prevent injection pump plunger bushing of plunger jamming, can avoid plunger jamming phenomenon, increase of service life.

In order to realize the purpose, the utility model provides a prevent injection pump plunger bushing of plunger jamming, including the plunger bushing body, this internal metal covering that is equipped with of plunger bushing, be equipped with the through-hole group that a plurality of intervals set up on the lateral wall of metal covering, the through-hole group comprises a plurality of through-holes that are circumference form interval setting, and the through-hole of two adjacent through-hole groups from top to bottom is crisscross to be set up, all be equipped with the solid lubricating body in the through-hole, the lubricated total area of all solid lubricating bodies accounts for 20 ~ 40% of the area of the interior rolling surface of metal covering.

Preferably, the total area of the solid lubricant is 30% of the area of the inner ring surface of the metal jacket body.

Preferably, the upper end of the plunger sleeve body is provided with a retaining ring.

Preferably, the lower end of the plunger sleeve body is provided with an annular fixed body fixedly connected with the plunger sleeve body through a screw, and the inner diameter of the annular fixed body is slightly smaller than that of the metal sleeve body.

Preferably, a sealing mechanism connected to the plunger is provided at a lower end of the annular fixing body.

Preferably, the sealing mechanism comprises an annular connector, a flexible sealing sleeve and an elastic rubber sleeve, the annular connector and the elastic rubber sleeve are respectively arranged at the upper end and the lower end of the flexible sealing sleeve, and the inner diameter of the elastic rubber sleeve is smaller than the diameter of the plunger.

Preferably, the outer circumferential surface of the elastic rubber sleeve is provided with a retaining ring.

Preferably, the annular connecting body is fixedly connected to the annular fixing body by a screw, and a seal ring is provided between the annular fixing body and the annular connecting body.

The utility model has the advantages that: the utility model discloses a with this internal metal covering that is equipped with of plunger bushing, be equipped with the through-hole group that a plurality of intervals set up on the lateral wall of the metal covering, the through-hole group comprises a plurality of through-holes that are circumference form interval setting, the crisscross setting of through-hole of two adjacent through-hole groups from top to bottom, all be equipped with the solid lubricating body in the through-hole, the lubricated total area of all solid lubricating bodies accounts for 20 ~ 40% of the area of the inner circle face of the metal covering, at frictional in-process, the solid transfer membrane that forms lubricated good on the friction surface is transferred to some of solid lubricating bodies, firmly adhere to and evenly cover, frictional wear has been reduced by a wide margin. Along with the friction, the embedded solid lubricant is continuously provided on the friction surface, thereby ensuring the good lubrication of the friction pair in long-term operation; sealing mechanism's design is avoided sliding friction between traditional plunger and the sealing member to cause the impaired of sealing member, influences sealedly, compares with prior art, can avoid plunger jamming phenomenon, increase of service life.

The features and advantages of the present invention will be described in detail by embodiments with reference to the accompanying drawings.

[ description of the drawings ]

Fig. 1 is the utility model discloses a prevent structure schematic diagram of injection pump plunger bushing of plunger jamming.

In the figure: 1-plunger sleeve body, 2-metal sleeve body, 3-through hole, 4-solid lubricating body, 5-retainer ring, 6-sealing mechanism, 7-sealing ring, 8-annular fixed body, 9-sealing pad, 61-annular connector, 62-flexible sealing sleeve, 63-elastic rubber sleeve and 64-retaining ring.

[ detailed description ] embodiments

Referring to fig. 1, the utility model relates to an injection pump plunger bushing for preventing plunger jamming, which comprises a plunger bushing body 1, a metal sleeve body 2 is arranged in the plunger bushing body 1, a plurality of through hole groups arranged at intervals are arranged on the side wall of the metal sleeve body 2, the through hole groups are composed of a plurality of through holes 3 arranged at intervals in a circumference shape, the through holes 3 of two adjacent through hole groups are arranged in a staggered way, solid lubricating bodies 4 are arranged in the through holes 3, the total lubricating area of all the solid lubricating bodies 4 accounts for 20-40% of the area of the inner ring surface of the metal sleeve body 2, the total lubricating area of all the solid lubricating bodies 4 accounts for 30% of the area of the inner ring surface of the metal sleeve body 2, a retainer ring 5 is arranged at the upper end of the plunger bushing body 1, an annular fixing body 8 fixedly connected with the plunger bushing body 1 through screws is arranged at the lower end of the plunger bushing body 1, the inner diameter of the annular fixing body 8 is slightly smaller than the inner diameter of the metal sleeve body 2, the lower extreme of cyclic annular fixed body 8 is equipped with the sealing mechanism 6 of being connected with the plunger, sealing mechanism 6 includes cyclic annular connector 61, flexible seal cover 62 and elastic rubber cover 63, the upper and lower both ends of flexible seal cover 62 are equipped with cyclic annular connector 61 and elastic rubber cover 63 respectively, elastic rubber cover 63's internal diameter is less than the diameter of plunger, be equipped with retaining ring 64 on the outer lane face of elastic rubber cover 63, cyclic annular connector 61 passes through screw and cyclic annular fixed body 8 fixed connection, be equipped with sealing washer 7 between cyclic annular fixed body 8 and the cyclic annular connector 61.

The utility model discloses the working process:

the utility model relates to a prevent oil spout pump plunger cover of plunger jamming in the course of the work, through being equipped with the metallic sheath body 2 in this 1 with the plunger bushing, be equipped with the through-hole group that a plurality of intervals set up on the lateral wall of the metallic sheath body 2, the through-hole group comprises a plurality of through-holes 3 that are circumference form interval setting, the crisscross setting of through-hole 3 of two adjacent through-hole groups from top to bottom, all be equipped with solid lubricating body 4 in the through-hole 3, the lubricated total area of all solid lubricating bodies 4 accounts for 20 ~ 40% of the area of the inner circle face of the metallic sheath body 2, at the in-process of friction, solid lubricating body 4 partly shifts and forms lubricated good on the friction surface, firmly attached to and the solid transfer membrane that evenly covers, frictional wear has been reduced by a wide margin. Along with the friction, the embedded solid lubricant is continuously provided on the friction surface, thereby ensuring the good lubrication of the friction pair in long-term operation; sealing mechanism 6's design is avoided sliding friction between traditional plunger and the sealing member to cause the impaired of sealing member, influences sealedly, compares with prior art, can avoid plunger jamming phenomenon, increase of service life.

The above-mentioned embodiment is right the utility model discloses an explanation, it is not right the utility model discloses a limited, any right the scheme after the simple transform of the utility model all belongs to the protection scope of the utility model.

Claims

1. The utility model provides a prevent injection pump plunger bushing of plunger jamming which characterized in that: including plunger bushing body (1), be equipped with the metallic sheath body (2) in plunger bushing body (1), be equipped with the through-hole group that a plurality of intervals set up on the lateral wall of the metallic sheath body (2), the through-hole group comprises a plurality of through-holes (3) that are the interval setting of circumference form, and through-hole (3) of two upper and lower adjacent through-hole groups are crisscross to be set up, all be equipped with solid lubricating body (4) in through-hole (3), the lubricated total area of all solid lubricating bodies (4) accounts for 20 ~ 40% of the area of the inner circle face of the metallic sheath body (2).

2. The plunger sleeve of an injection pump for preventing plunger sticking of claim 1, wherein: the total lubricating area of all the solid lubricating bodies (4) accounts for 30% of the area of the inner ring surface of the metal sleeve body (2).

3. The plunger sleeve of an injection pump for preventing plunger sticking of claim 1, wherein: and a check ring (5) is arranged at the upper end of the plunger sleeve body (1).

4. The plunger sleeve of an injection pump for preventing plunger sticking of claim 1, wherein: the lower end of the plunger sleeve body (1) is provided with an annular fixing body (8) fixedly connected with the plunger sleeve body through a screw, and the inner diameter of the annular fixing body (8) is slightly smaller than that of the metal sleeve body (2).

5. The plunger sleeve of an injection pump for preventing plunger sticking of claim 4, wherein: the lower end of the annular fixed body (8) is provided with a sealing mechanism (6) connected with the plunger.

6. The plunger sleeve of an injection pump for preventing plunger sticking of claim 5, wherein: the sealing mechanism (6) comprises an annular connector (61), a flexible sealing sleeve (62) and an elastic rubber sleeve (63), the upper end and the lower end of the flexible sealing sleeve (62) are respectively provided with the annular connector (61) and the elastic rubber sleeve (63), and the inner diameter of the elastic rubber sleeve (63) is smaller than the diameter of the plunger.

7. The plunger sleeve of an injection pump for preventing plunger sticking of claim 6, wherein: and a retaining ring (64) is arranged on the outer ring surface of the elastic rubber sleeve (63).

8. The plunger sleeve of an injection pump for preventing plunger sticking of claim 6, wherein: the annular connecting body (61) is fixedly connected with the annular fixing body (8) through a screw, and a sealing ring (7) is arranged between the annular fixing body (8) and the annular connecting body (61).