CN110792540A - Leak protection plunger matching parts for injection pump - Google Patents
Leak protection plunger matching parts for injection pump Download PDFInfo
- Publication number
- CN110792540A CN110792540A CN201810875477.2A CN201810875477A CN110792540A CN 110792540 A CN110792540 A CN 110792540A CN 201810875477 A CN201810875477 A CN 201810875477A CN 110792540 A CN110792540 A CN 110792540A
- Authority
- CN
- China
- Prior art keywords
- plunger
- arc
- shaped groove
- oil
- sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/442—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston means preventing fuel leakage around pump plunger, e.g. fluid barriers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention belongs to the technical field of plungers for oil injection pumps, and particularly relates to a leakage-proof plunger matching part for an oil injection pump, which comprises a plunger arranged in a plunger sleeve, wherein a first annular oil storage groove and a second annular oil storage groove are arranged on the inner circumferential surface of an inner sleeve of the plunger sleeve, and the first annular oil storage groove and the second annular oil storage groove are not communicated; the plunger comprises an inner plunger sleeve and an outer plunger sleeve, a first arc-shaped groove and a second arc-shaped groove are respectively arranged on the outer circumferential surface of the inner plunger sleeve, a third arc-shaped groove and a fourth arc-shaped groove are respectively arranged on the inner circumferential surface of the outer plunger sleeve, and the first arc-shaped groove, the second arc-shaped groove, the third arc-shaped groove and the fourth arc-shaped groove are axially arranged; the first arc-shaped groove and the third arc-shaped groove are oppositely arranged to form a first oil return channel, an oil return opening at the upper end of the first oil return channel is communicated with the low-pressure oil cavity, and the lower end of the first oil return channel is communicated with the first annular oil storage groove. According to the invention, the plunger is designed as a split mechanism, the inner sleeve and the outer sleeve are correspondingly designed with the arc-shaped grooves, and the two arc-shaped grooves form the oil return channel, so that internal combustion oil leakage is introduced into the low-pressure oil cavity, and the internal leakage fuel oil is effectively prevented from permeating into other parts of the oil pump.
Description
Technical Field
The invention relates to a leakage-proof plunger and barrel assembly for an oil injection pump, and belongs to the technical field of plungers for oil injection pumps.
Background
The plunger in the fuel injection pump does up-and-down reciprocating motion relative to the plunger sleeve, low-pressure fuel is pressed into the high-pressure fuel pipe, part of the fuel can leak to the annular oil storage groove of the plunger sleeve along a fit clearance in the oil pressing process, and the internally leaked fuel can permeate to other parts of the oil pump to influence the use of products.
Disclosure of Invention
The invention aims to provide a leakage-proof plunger matching part for an oil injection pump.
The invention aims to realize the technical scheme that the leakage-proof plunger matching part for the oil injection pump comprises a plunger sleeve and a plunger, wherein the plunger is arranged in the plunger sleeve, and the leakage-proof plunger matching part is characterized in that a first annular oil storage groove and a second annular oil storage groove are arranged on the inner circumferential surface of an inner sleeve of the plunger;
the plunger comprises a plunger inner sleeve and a plunger outer sleeve, a first arc-shaped groove and a second arc-shaped groove are respectively arranged on the outer circumferential surface of the inner sleeve, a third arc-shaped groove and a fourth arc-shaped groove are respectively arranged on the inner circumferential surface of the plunger outer sleeve, and the first arc-shaped groove, the second arc-shaped groove, the third arc-shaped groove and the fourth arc-shaped groove are axially arranged;
the first arc-shaped groove and the third arc-shaped groove are oppositely arranged to form a first oil return channel, an oil return opening at the upper end of the first oil return channel is communicated with the low-pressure oil cavity, and the lower end of the first oil return channel is communicated with the first annular oil storage groove;
the second arc-shaped groove and the fourth arc-shaped groove are oppositely arranged to form a second oil return channel, an oil return opening at the upper end of the second oil return channel is communicated with the low-pressure oil cavity, and the lower end of the second oil return channel is communicated with the second annular oil storage groove.
Preferably, an oil return opening at the upper end of the first oil return channel is flush with the top surface of the plunger sleeve.
Preferably, an oil return opening at the upper end of the first and second oil return passages is flush with the top surface of the plunger sleeve.
Preferably, the plunger inner sleeve is of a step structure, and the upper part of the plunger inner sleeve is tightly matched with the plunger outer sleeve.
Compared with the prior art, the invention has the following beneficial effects: the plunger is sleeved with an inner sleeve and an outer sleeve, the inner sleeve and the outer sleeve are correspondingly provided with arc-shaped grooves, the two arc-shaped grooves form an oil return channel, the oil return channel is communicated with the annular oil storage groove of the plunger, the inner leakage fuel oil is discharged into the low-pressure oil cavity from an oil return port through the oil return channel, and the inner leakage fuel oil is effectively prevented from permeating other parts of the oil pump.
Description of the drawings:
FIG. 1 is a schematic diagram of a leak-proof plunger and barrel assembly for an injection pump according to the present invention.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to the accompanying drawings.
As shown in figure 1, the leak-proof plunger and barrel assembly for the injection pump comprises a plunger sleeve 2 and a plunger 1, wherein the plunger 1 is arranged in the plunger sleeve 2.
The inner circumferential surface of the plunger inner sleeve 22 is provided with a first annular oil storage groove 31 and a second annular oil storage groove 32, and the first annular oil storage groove 31 and the second annular oil storage groove 32 are not communicated.
The plunger 1 comprises a plunger inner sleeve 22 and a plunger outer sleeve 21, and a first arc-shaped groove 221 and a second arc-shaped groove 222 are respectively arranged on the outer circumferential surface of the inner sleeve 22.
The inner circumferential surface of the plunger outer sleeve 21 is respectively provided with a third arc-shaped groove 211 and a fourth arc-shaped groove 212, and the first arc-shaped groove 221, the second arc-shaped groove 222, the third arc-shaped groove 211 and the fourth arc-shaped groove 212 are axially arranged.
The first arc-shaped groove 221 and the third arc-shaped groove 211 are oppositely arranged to form a first oil return channel 41, an oil return opening at the upper end of the first oil return channel is communicated with the low-pressure oil chamber, and the lower end of the first oil return channel is communicated with the first annular oil storage groove 31.
The second arc-shaped groove 222 and the fourth arc-shaped groove 212 are oppositely arranged to form a second oil return passage 42, an oil return opening at the upper end of the second oil return passage is communicated with the low-pressure oil chamber, and the lower end of the second oil return passage is communicated with the second annular oil storage groove 32.
And an oil return opening at the upper end of the first oil return channel is flush with the top surface of the plunger sleeve 2.
And an oil return port at the upper end of the first and second oil return channels is flush with the top surface of the plunger sleeve 2.
The plunger inner sleeve 22 is of a stepped structure, and the upper part of the plunger inner sleeve 22 is tightly matched with the plunger outer sleeve 21.
The plunger in the injection pump does up-and-down reciprocating motion relative to the plunger sleeve, low-pressure fuel is pressed into the high-pressure fuel pipe, partial fuel can leak to the annular oil storage groove of the plunger sleeve along a fit clearance in the process of pressing the fuel, the plunger sleeve is designed into an inner sleeve and outer sleeve structure, inner and outer sleeves are correspondingly provided with arc grooves, two arc grooves form an oil return channel, the oil return channel is communicated with the annular oil storage groove of the plunger, the inner-leakage fuel is discharged into a low-pressure oil cavity from an oil return opening through the oil return channel, and the inner-leakage fuel is effectively prevented from permeating to other parts of the oil pump.
Claims (4)
1. A leakage-proof plunger matching part for an oil injection pump comprises a plunger sleeve (2) and a plunger (1), wherein the plunger (1) is arranged in the plunger sleeve (2), and the leakage-proof plunger matching part is characterized in that a first annular oil storage groove (31) and a second annular oil storage groove (32) are formed in the inner circumferential surface of a plunger inner sleeve (22), and the first annular oil storage groove (31) and the second annular oil storage groove (32) are not communicated;
the plunger (1) comprises a plunger inner sleeve (22) and a plunger outer sleeve (21), a first arc-shaped groove (221) and a second arc-shaped groove (222) are respectively arranged on the outer circumferential surface of the inner sleeve (22), a third arc-shaped groove (211) and a fourth arc-shaped groove (212) are respectively arranged on the inner circumferential surface of the plunger outer sleeve (21), and the first arc-shaped groove (221), the second arc-shaped groove (222), the third arc-shaped groove (211) and the fourth arc-shaped groove (212) are axially arranged;
the first arc-shaped groove (221) and the third arc-shaped groove (211) are oppositely arranged to form a first oil return channel (41), an oil return opening at the upper end of the first oil return channel is communicated with the low-pressure oil cavity, and the lower end of the first oil return channel is communicated with the first annular oil storage groove (31);
the second arc-shaped groove (222) and the fourth arc-shaped groove (212) are oppositely arranged to form a second oil return channel (42), an oil return opening at the upper end of the second oil return channel is communicated with the low-pressure oil cavity, and the lower end of the second oil return channel is communicated with the second annular oil storage groove (32).
2. The leak-proof plunger and barrel assembly for the oil injection pump as claimed in claim 1, wherein an oil return port at the upper end of the first oil return passage is flush with the top surface of the plunger sleeve (2).
3. The leak-proof plunger and barrel assembly for the oil injection pump according to claim 1 or 2, wherein an oil return port at the upper end of the first and second oil return channels is flush with the top surface of the plunger sleeve (2).
4. The leak-proof plunger and barrel assembly for the oil injection pump as claimed in claim 3, wherein said plunger inner sleeve (22) is of a stepped structure, and the upper portion of the plunger inner sleeve (22) is tightly fitted with the plunger outer sleeve (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810875477.2A CN110792540A (en) | 2018-08-03 | 2018-08-03 | Leak protection plunger matching parts for injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810875477.2A CN110792540A (en) | 2018-08-03 | 2018-08-03 | Leak protection plunger matching parts for injection pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110792540A true CN110792540A (en) | 2020-02-14 |
Family
ID=69425648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810875477.2A Pending CN110792540A (en) | 2018-08-03 | 2018-08-03 | Leak protection plunger matching parts for injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110792540A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115773240A (en) * | 2023-02-02 | 2023-03-10 | 仪征威业油泵油嘴有限公司 | Oil pump convenient to adjust |
-
2018
- 2018-08-03 CN CN201810875477.2A patent/CN110792540A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115773240A (en) * | 2023-02-02 | 2023-03-10 | 仪征威业油泵油嘴有限公司 | Oil pump convenient to adjust |
| CN115773240B (en) * | 2023-02-02 | 2023-04-14 | 仪征威业油泵油嘴有限公司 | Oil pump convenient to adjust |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200214 |