CN216803302U

CN216803302U - U-shaped sealing ring installation tool of high-pressure oil pump

Info

Publication number: CN216803302U
Application number: CN202123033273.0U
Authority: CN
Inventors: 吴尚华; 黄汉龙; 余军民; 王巍
Original assignee: CSSC Marine Power Zhenjiang Co Ltd
Current assignee: CSSC Marine Power Zhenjiang Co Ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-06-24
Anticipated expiration: 2031-12-06

Abstract

The utility model discloses a U-shaped sealing ring installation tool of a high-pressure oil pump, which comprises an assembly sleeve, an installation conical barrel, an expansion sleeve and a screw, wherein an inner hole of the assembly sleeve and a blind hole at one end of the installation conical barrel are in clearance fit with the excircle of a plunger, the assembly sleeve is sleeved on the middle part of the plunger, the installation conical barrel is sleeved on the other end of the plunger, and the U-shaped sealing ring sleeved on the middle part of the plunger is positioned between the installation conical barrel and the assembly sleeve. One end of the screw is screwed into a threaded hole in the other end of the mounting cone, a blind hole in one end of the expansion sleeve is sleeved on the mounting cone, and the blind hole is in clearance fit with the outer circle of the mounting cone. The plunger piston mounting structure is simple in structure, simple, convenient and accurate to mount, ensures the accurate mounting position of the U-shaped sealing ring on the plunger piston, improves the mounting efficiency and avoids the mounting risk.

Description

U-shaped sealing ring installation tool of high-pressure oil pump

Technical Field

The utility model relates to an installation tool for an oil pump sealing ring, in particular to an installation tool for installing a sealing ring on a high-pressure oil pump core, and belongs to the technical field of diesel engine assembly.

Background

The high-pressure oil pump is commonly used for fuel oil delivery of an internal combustion engine, is a main component of a fuel supply system of a diesel engine, and is used for supplying high-pressure diesel oil to an oil injector in a timed and quantitative mode. In the field debugging of the diesel engine, a pump core and a plunger in a high-pressure oil pump need to be detached, and the thickness of a gasket in the pump core is adjusted, so that the purpose of adjusting the lift of the plunger is achieved. However, the existing method for manually installing the U-shaped sealing ring on the plunger is easy to damage the U-shaped sealing ring, and the U-shaped sealing ring cannot be quickly and accurately installed at the corresponding position of the middle part of the plunger in the installation process, so that the high-pressure oil pump leaks oil.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a U-shaped sealing ring mounting tool of a high-pressure oil pump, which improves the mounting quality and the mounting work efficiency of a U-shaped sealing ring.

The utility model is realized by the following technical scheme:

a U-shaped sealing ring mounting tool of a high-pressure oil pump comprises a mounting sleeve, a mounting cone, an expansion sleeve and a screw, wherein an inner hole of the mounting sleeve and a blind hole at one end of the mounting cone are in clearance fit with an excircle of a plunger; the blind hole at one end of the installation conical cylinder is sleeved on the other end of the plunger, the bottom surface of the blind hole abuts against the end head at the other end of the plunger, and the U-shaped sealing ring sleeved on the middle part of the plunger is positioned between the end surface at one end of the installation conical cylinder and the end surface at the other end of the assembly sleeve; the outer peripheral surface of the end head at the other end of the mounting conical cylinder is a conical outer peripheral surface, a threaded hole communicated with the blind hole is formed in the center of the end head at the other end of the mounting conical cylinder, an exhaust hole communicated with the blind hole is also axially formed in the end head at the other end of the mounting conical cylinder, and one end of a screw is screwed into the threaded hole; the blind hole of the one end of the expansion sleeve is sleeved on the installation conical cylinder, the blind hole is in clearance fit with the excircle of the installation conical cylinder, and the other end of the screw penetrates out of the central hole at the other end of the expansion sleeve.

The object of the utility model can be further achieved by the following technical measures:

furthermore, an inner taper hole connected with the expansion sleeve blind hole is formed in one end head of the expansion sleeve, and the inner taper hole is matched with the tapered peripheral surface of the other end port of the assembling sleeve; the small end of the inner taper hole is connected with the adjacent positioning counter bore, and the positioning counter bore is matched with the excircle of the U-shaped sealing ring; when the U-shaped sealing ring is pushed in place, one side end face of the U-shaped sealing ring abuts against the bottom face of the positioning counter bore, and two ends of the positioning counter bore are respectively connected with the small end of the inner taper hole and one end of the expansion sleeve blind hole; one end of the expansion sleeve abuts against the corresponding end face of the annular step at the other end of the assembly sleeve, and the inner conical hole is attached to the conical outer peripheral face of the end at the other end of the assembly sleeve.

Furthermore, the taper of the tapered peripheral surface of the end head at the other end of the assembling sleeve and the taper of the inner taper hole of the end head at one end of the expansion sleeve are both 1: 10.

Furthermore, the peripheral face of one end of the expansion sleeve is provided with a locking ring groove, the rubber ring sleeve is sleeved in the locking ring groove to lock one end of the expansion sleeve, and the peripheral face of the other end of the expansion sleeve is provided with an arc-shaped groove.

Furthermore, the assembling sleeve, the mounting cone and the expansion sleeve are all made of Teflon.

The plunger piston sealing device is simple in structure, only three pipe fittings of the assembling sleeve, the mounting cone and the expanding sleeve are needed, the end head of the other end of the expanding sleeve is abutted against the annular step of the other end of the assembling sleeve, and the inner taper hole of the expanding sleeve and the conical outer peripheral surface of the end head of the other end of the assembling sleeve are attached to each other, so that the U-shaped sealing ring can be quickly mounted on the plunger piston, the U-shaped sealing ring cannot be damaged by a sharp edge on the plunger piston, the accurate mounting position of the U-shaped sealing ring on the plunger piston can be guaranteed, and the plunger piston provided with the U-shaped sealing ring can be conveniently mounted in a pump core of a high-pressure oil pump. The installation efficiency is improved, and the installation risk is avoided.

Advantages and features of the present invention will be illustrated and explained by the following non-restrictive description of preferred embodiments thereof, given by way of example only with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic structural diagram of the installation tool of the utility model.

Detailed Description

The utility model is further illustrated by the following figures and examples.

As shown in fig. 1, the installation tool of this embodiment includes an assembly sleeve 1, an installation cone 2, an expansion sleeve 3 and a screw 4, an assembly sleeve inner hole 11 and a blind hole 21 at one end of the installation cone 2 are both in clearance fit with an outer circle of a plunger 10, the assembly sleeve 1 is sleeved on the middle of the plunger 10, the left end of the assembly sleeve 1 abuts against the end face of a crosshead 101 at the middle of the plunger 10, an annular groove 12 and an annular step 13 are sequentially arranged on the outer peripheral surface at the right end of the assembly sleeve 1, and the outer peripheral surface at the port at the right end of the assembly sleeve 1 is an outer conical surface 14. The blind hole 21 of installation awl section of thick bamboo 2 left end is overlapped on the plunger 10 right-hand member, and the blind hole 21 bottom surface supports and leans on the plunger 10 right-hand member end for installation awl section of thick bamboo 2 is fixed a position on plunger 10 middle part, and U type sealing washer 20 is located between the left end terminal surface of installation awl section of thick bamboo 2 and the assembly sleeve 1 right-hand member terminal surface. The outer peripheral surface of the right end of the installation conical cylinder 2 is a conical outer peripheral surface which is convenient for the expansion sleeve 3 to be sleeved in, a threaded hole 22 communicated with the blind hole 21 is formed in the center of the right end of the installation conical cylinder 2, an exhaust hole 23 communicated with the blind hole 21 is further axially formed in the other end of the installation conical cylinder, and when the blind hole 21 of the installation conical cylinder 2 is sleeved on the plunger 10, air in the blind hole 21 can be conveniently exhausted. The left end of the screw 4 is screwed into the threaded hole 22, so that the mounting cone 2 is pushed to move to the left on the plunger 10. An expansion sleeve blind hole 31 at the left end of the expansion sleeve 3 is sleeved on the installation conical barrel 2, the expansion sleeve blind hole 31 is in clearance fit with the excircle of the installation conical barrel 2, and the other end of the screw 4 penetrates out of a central hole 32 at the right end of the expansion sleeve 3.

The left end of the expansion sleeve 3 is provided with an inner taper hole 33 connected with the expansion sleeve blind hole 31, and the inner taper hole 33 is matched with the tapered peripheral surface of the right end port of the assembly sleeve 1; the small end of the inner taper hole 33 is connected with the adjacent positioning counter bore 34, and the positioning counter bore 34 is matched with the excircle of the U-shaped sealing ring 20. When the U-shaped sealing ring 20 is pushed in place, one side end face of the U-shaped sealing ring abuts against the bottom face of the positioning counter bore 34, and two ends of the positioning counter bore 34 are respectively connected with the small end of the inner taper hole 33 and the left end of the expansion sleeve blind hole 31. The end head of the left end of the expansion sleeve 3 is abutted against the corresponding end surface of the annular step 13 at the right end of the assembly sleeve 1, and the inner taper hole 33 is attached to the tapered peripheral surface of the end head at the right end of the assembly sleeve 1. The taper of the tapered peripheral surface of the right end of the assembling sleeve 1 and the taper of the inner taper hole 33 of the left end of the expansion sleeve 3 are both 1: 10.

The peripheral face of 3 left end ends of cover that expand is equipped with locking

annular groove

35, and 5 covers of rubber circle lock the left end of cover 3 in locking

annular groove

35, and 3 right-hand member end peripheral faces of cover that expand are equipped with arc wall 36.

The using process of the utility model is as follows:

1) preparing before installation, firstly removing an auxiliary oil injection pipe of the high-pressure oil pump and cleaning the outside, then removing the plunger 10 of the high-pressure oil pump by using a special tool, taking out the damaged U-shaped sealing ring 20 and cleaning the plunger 10 of the high-pressure oil pump.

2) The U-shaped sealing ring 20 is heated by a hot air gun at 145 ℃, so that the heated expansion inner diameter of the U-shaped sealing ring is increased, and the U-shaped sealing ring is convenient to install.

3) Installing the assembling sleeve 1, sleeving the assembling sleeve 1 on the middle part of the plunger 10, enabling the left end of the assembling sleeve 1 to abut against the end face of a crosshead 101 in the middle part of the plunger 10, and manually sleeving the heated U-shaped sealing ring 20 on the plunger 10.

4) The installation awl section of thick bamboo 2 promotes U type sealing washer 20 to the corresponding position of plunger 10, in screwing the screw hole 22 of installation awl section of thick bamboo 2 right-hand member end center with 4 left ends of screw, then 4 right-hand member ends of hand holding screw, the blind hole 21 cover that will install the awl section of thick bamboo 2 cover left end is on the plunger 10 right end, reuse installation awl section of thick bamboo 2 promotes U type sealing washer 20 on the plunger 10, until the blind hole 21 bottom surface of installation awl section of thick bamboo 2 left end supports and leans on the plunger 10 right-hand member end, installation awl section of thick bamboo 2 left end port pushes away U type sealing washer 20 to the corresponding position of plunger 10.

5) And installing the expansion sleeve 3, and installing the U-shaped sealing ring 20 in place through the expansion sleeve 3. Firstly, the rubber ring 5 is sleeved in a locking ring groove 35 at the left end of the expansion sleeve 3 to lock the left end of the expansion sleeve 3, then the arc-shaped groove 36 at the right end of the expansion sleeve 3 is held by hands, the expansion sleeve blind hole 31 at one end of the expansion sleeve 3 is sleeved on the installation taper barrel 2 to push the expansion sleeve 3 to move towards the direction of the assembly sleeve 1 until the right side of the U-shaped sealing ring 20 is abutted against the end face of a positioning counter bore 35 at the left end of the expansion sleeve 3, the other left end of the expansion sleeve 3 is abutted against an annular step 13 at the right end of the assembly sleeve 1, and the inner conical hole 33 of the expansion sleeve 3 and the conical outer peripheral face of the right end of the assembly sleeve 1 are mutually abutted, so that the installation of the U-shaped sealing ring 5 is completed.

6) And disassembling the tool, namely respectively disassembling the expansion sleeve 3 and the mounting cone 2, then disassembling a crosshead 101 in the middle of the plunger 10, taking down the assembling sleeve 1 sleeved on the middle of the plunger 10, then assembling the crosshead 101, and finally assembling the plunger 10 provided with the U-shaped sealing ring 20 into a pump core of a high-pressure oil pump.

In addition to the above embodiments, the present invention may have other embodiments, and any technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of the claims of the present invention.

Claims

1. A U-shaped sealing ring mounting tool of a high-pressure oil pump is characterized by comprising a mounting sleeve, a mounting cone, an expansion sleeve and a screw, wherein an inner hole of the mounting sleeve and a blind hole at one end of the mounting cone are in clearance fit with an excircle of a plunger; the blind hole at one end of the installation conical cylinder is sleeved on the other end of the plunger, the bottom surface of the blind hole abuts against the end head at the other end of the plunger, and the U-shaped sealing ring sleeved on the middle part of the plunger is positioned between the end surface at one end of the installation conical cylinder and the end surface at the other end of the assembly sleeve; the outer peripheral surface of the end head at the other end of the mounting conical cylinder is a conical outer peripheral surface, a threaded hole communicated with the blind hole is formed in the center of the end head at the other end of the mounting conical cylinder, an exhaust hole communicated with the blind hole is also axially formed in the end head at the other end of the mounting conical cylinder, and one end of a screw of the threaded hole is screwed into the threaded hole; the blind hole of the expansion sleeve at one end of the expansion sleeve is sleeved on the mounting conical cylinder, the blind hole of the expansion sleeve is in clearance fit with the excircle of the mounting conical cylinder, and the other end of the screw penetrates out of the central hole at the other end of the expansion sleeve.

2. The tool for installing the U-shaped sealing ring of the high-pressure oil pump according to claim 1, wherein an inner taper hole connected with the expansion sleeve blind hole is formed in one end of the expansion sleeve, and the inner taper hole is matched with the tapered peripheral surface of the other end port of the assembling sleeve; the small end of the inner taper hole is connected with the adjacent positioning counter bore, and the positioning counter bore is matched with the excircle of the U-shaped sealing ring; when the U-shaped sealing ring is pushed in place, one side end face of the U-shaped sealing ring abuts against the bottom face of the positioning counter bore, and two ends of the positioning counter bore are respectively connected with the small end of the inner taper hole and one end of the expansion sleeve blind hole; one end of the expansion sleeve abuts against the corresponding end face of the annular step at the other end of the assembly sleeve, and the inner conical hole is attached to the conical outer peripheral face of the end at the other end of the assembly sleeve.

3. The tool for installing the U-shaped sealing ring of the high-pressure oil pump as claimed in claim 2, wherein the taper of the tapered outer peripheral surface of the end head at the other end of the assembling sleeve and the taper of the inner taper hole of the end head at one end of the expansion sleeve are both 1: 10.

4. The tool for installing the U-shaped seal ring of the high-pressure oil pump as claimed in claim 2, wherein the outer peripheral surface of one end of the expansion sleeve is provided with a locking ring groove, the rubber ring is sleeved in the locking ring groove to lock the one end of the expansion sleeve, and the outer peripheral surface of the other end of the expansion sleeve is provided with an arc-shaped groove.

5. The tool for installing the U-shaped sealing ring of the high-pressure oil pump according to claim 1, wherein the assembling sleeve, the installing conical cylinder and the expansion sleeve are all made of Teflon.