CN202493366U - Fuel oil delivery pump - Google Patents
Fuel oil delivery pump Download PDFInfo
- Publication number
- CN202493366U CN202493366U CN2012201434574U CN201220143457U CN202493366U CN 202493366 U CN202493366 U CN 202493366U CN 2012201434574 U CN2012201434574 U CN 2012201434574U CN 201220143457 U CN201220143457 U CN 201220143457U CN 202493366 U CN202493366 U CN 202493366U
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- CN
- China
- Prior art keywords
- seal ring
- fuel transfer
- transfer pump
- vertical portion
- oil
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a fuel oil delivery pump which comprises a pump body, an oil cylinder, a cam transmission mechanism, a push rod and a sealing ring. A first accommodation cavity is arranged in the pump body, an oil discharge hole is arranged on the pump body, a second accommodation cavity is positioned in the oil cylinder, the oil cylinder is fixed at the lower end of the pump body, and the second accommodation cavity is communicated with the first accommodation cavity. The cam transmission mechanism is arranged in the second accommodation cavity, the push rod is connected with the cam transmission mechanism, one portion of the push rod is arranged in the first accommodation cavity, the other portion of the push rod is arranged in the second accommodation cavity, the sealing ring is sleeved on the push rod, an annular oil discharge groove is arranged on the sealing ring and extends along the circumferential direction of the sealing ring, and the oil discharge hole is communicated with the oil discharge groove. According to an embodiment of the fuel oil delivery pump, the fuel oil delivery pump has the advantages of being easy to assemble, long in service life and the like.
Description
Technical field
The utility model relates to a kind of fuel transfer pump.
Background technique
The fuel transfer pump of the oil supply system of DENG utilizes camshaft power that the fuel delivery in the fuel tank is arrived the high-pressure service pump filler opening when DENG is worked.But structurally there is certain defective in the prior fuel oil transfer pump.In order to improve the sealability of fuel transfer pump, can on the push rod of fuel transfer pump, seal ring be set.The prior fuel oil transfer pump has very high requirement to the installation precision of seal ring, promptly at axial position with position accuracy demand all arranged in the radial direction.That is to say that the position of seal ring is unique, increased the assembling difficulty of seal ring so widely.
The model utility content
The utility model is intended to solve at least one of technical problem that exists in the existing technology.
For this reason, the utility model purpose is to propose the fuel transfer pump of a kind of easy assembling, long service life.
For realizing above-mentioned purpose, according to the utility model a kind of fuel transfer pump is proposed, said fuel transfer pump comprises: the pump housing has first receiving cavity and the said pump housing and is provided with and unloads oilhole in the said pump housing; Oil cylinder has the lower end that second receiving cavity and said oil cylinder are fixed on the said pump housing in the said oil cylinder, wherein said second receiving cavity is communicated with said first receiving cavity; Cam drive, said cam drive are located in said second receiving cavity; Push rod, said push rod links to each other with said cam drive; And seal ring; Said seal ring be fixed on the wall of said first receiving cavity and said ring set on said push rod; The oil groove and said of unloading that wherein said seal ring is provided with annular unloads the extending circumferentially of oil groove along said seal ring, and the said oilhole that unloads is communicated with the said oil groove that unloads.
According to the fuel transfer pump of the utility model through unloading oil groove along the annular of the extending circumferentially of said seal ring said and the said said oilhole that unloads on unloading oil groove and being located at the said pump housing is connected being provided with on the said seal ring;, the axial position that when said seal ring is installed, only need control said seal ring need not control the radial direction of said seal ring thereby getting final product; Promptly only need guarantee saidly to unload oil groove and the said oilhole that unloads gets final product relatively, can reduce the assembling difficulty of said seal ring so widely.Therefore, the fuel transfer pump according to the utility model has advantages such as easy assembling.Wherein, The fuel oil that leaks can get into said unloading in the oil groove; Because the said oil groove that unloads is communicated with the said oilhole that unloads, the fuel oil that therefore leaks can be discharged to outside the fuel transfer pump according to the utility model through the said oilhole that unloads, thereby the fuel oil that can prevent heads enters in the said oil cylinder.
In addition,, can reduce the leakage rate of fuel oil widely, therefore can not dilute said in-oil cylinder lubricating oil, thereby avoid pulling fastness and avoid damaging parts such as said oil cylinder, said push rod, said cam drive through said seal ring is set.Therefore, the fuel transfer pump according to the utility model has advantages such as long service life.
In addition, the fuel transfer pump according to the utility model can also have following additional technical characteristics:
The bottom of said seal ring is provided with the lip limit.
Said fuel transfer pump also comprises the pretension elastic component, and said pretension elastic component is sleeved on the said seal ring.
Said pretension elastic component is a preloading spring, and said preloading spring is sleeved on the top of said seal ring.
Said fuel transfer pump also comprises the sealing skeleton, and the bottom of said sealing skeleton is located on the said seal ring, limits holding space between the top of said sealing skeleton and the said seal ring, and said preloading spring is located in the said holding space.
Said seal ring is provided with the extending circumferentially of the said seal ring of mounting groove and said mounting groove edge of annular, and said sealing skeleton comprises: the first vertical portion, and the said first vertical portion is installed in the said mounting groove; Horizontal part, an end of said horizontal part links to each other with the upper end of the said first vertical portion; With the second vertical portion, the lower end of the said second vertical portion links to each other with the other end of said horizontal part, limits said holding space between the wherein said second vertical portion and the said seal ring.
The said first vertical portion, said horizontal part and the said second vertical portion are integrally formed.
Said oil cylinder is fixed on the lower end of the said pump housing through fastening piece.
Said fastening piece is a plurality of, the spaced apart setting of said a plurality of fastening pieces.
Additional aspect of the utility model and advantage part in the following description provide, and part will become obviously from the following description, or recognize through the practice of the utility model.
Description of drawings
Above-mentioned and/or additional aspect of the utility model and advantage obviously with are easily understood becoming embodiment's the description from combining figs, wherein:
Fig. 1 is the structural representation according to the utility model embodiment's fuel transfer pump; With
Fig. 2 is the partial structurtes schematic representation according to the utility model embodiment's fuel transfer pump.
Embodiment
Describe the embodiment of the utility model below in detail, said embodiment's example is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment who is described with reference to the drawings below, only be used to explain the utility model, and can not be interpreted as restriction the utility model.
In the description of the utility model; It will be appreciated that; Term " vertically ", " laterally ", " on ", the orientation of indications such as D score, " preceding ", " back ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward " or position relation be for based on orientation shown in the drawings or position relation; Only be to describe with simplifying for the ease of describing the utility model; Rather than the device or the element of indication or hint indication must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction to the utility model.
In addition, term " first ", " second " only are used to describe purpose, and can not be interpreted as indication or hint relative importance.
In the description of the utility model, unless otherwise prescribed and limit, need to prove; Term " installation ", " linking to each other ", " connection " should be done broad understanding, for example, can be mechanical connection or electrical connection; Also can be the connection of two element internals, can be directly to link to each other, and also can link to each other indirectly through intermediary; For those of ordinary skill in the art, can understand the concrete implication of above-mentioned term as the case may be.
See figures.1.and.2 below and describe fuel transfer pump according to the utility model embodiment.As depicted in figs. 1 and 2, comprise the pump housing 1, oil cylinder 10, cam drive 5, push rod 6 and seal ring 11 according to the utility model embodiment's fuel transfer pump.
Have first receiving cavity 17 and the pump housing 1 in the pump housing 1 and be provided with and unload oilhole 16, have the lower end that second receiving cavity 18 and oil cylinder 10 are fixed on the pump housing 1 in the oil cylinder 10, wherein second receiving cavity 18 is communicated with first receiving cavity 17.Cam drive 5 is located in second receiving cavity 18.Push rod 6 links to each other with cam drive 5.Seal ring 11 is fixed on the wall of first receiving cavity 17, and seal ring 11 is sleeved on the push rod 6, and wherein seal ring 11 is provided with unloading oil groove 14 and unloading the extending circumferentially of oil groove 14 along seal ring 11 of annular, unloads oilhole 16 and unloads oil groove 14 and be communicated with.
According to the utility model embodiment's fuel transfer pump through be provided with on the seal ring 11 along the annular of the extending circumferentially of seal ring 11 unload oil groove 14 and unload oil groove 14 and be located at the pump housing 1 on the oilhole 16 that unloads be connected;, the axial position that when seal ring 11 is installed, only need control seal ring 11 need not control the radial direction of seal ring 11 thereby getting final product; Promptly only need guarantee to unload oil groove 14 and unload oilhole 16 and get final product relatively, can reduce the assembling difficulty of seal ring 11 so widely.Therefore, the fuel transfer pump according to the utility model embodiment has advantages such as easy assembling.Wherein, The fuel oil that leaks can get into and unload in the oil groove 14; Owing to unload oil groove 14 and unload oilhole 16 and is communicated with, so the fuel oil of leakage can be discharged to outside the fuel transfer pump according to the utility model embodiment through unloading oilhole 16, thereby the fuel oil that can prevent heads enters in the oil cylinder 10.
In addition,, can reduce the leakage rate of fuel oil widely, therefore can not dilute the lubricating oil in the oil cylinder 10, thereby avoid pulling fastness and avoid damaging parts such as oil cylinder 10, push rod 6, cam drive 5 through seal ring 11 is set.Therefore, the fuel transfer pump according to the utility model embodiment has advantages such as long service life.
Particularly, as shown in Figure 1, the part of push rod 6 is positioned at first receiving cavity 17, and another part of push rod 6 is positioned at second receiving cavity 18, and push rod 6 moves under the drive of cam drive 5 along the vertical direction.Like this, in said fuel transfer pump working procedure, the length of the length of the part that is positioned at first receiving cavity 17 of push rod 6 and the part that is positioned at second receiving cavity 18 of push rod 6 all is to change in time.
As shown in Figure 2, in some embodiments of the utility model, the bottom of seal ring 11 can be provided with lip limit 15.Through bottom lip limit 15 is set, thereby can prevents that the machine oil in the oil cylinder 10 from being taken out of when the to-and-fro motion by push rod 6, solved problems such as oil consumption is big, befouling environment like this at seal ring 11.In other words, the fuel transfer pump according to the utility model embodiment has the low advantage of operating cost.
In some examples of the utility model, as shown in Figure 2, said fuel transfer pump can also comprise pretension elastic component 13, and pretension elastic component 13 can be sleeved on the seal ring 11.In other words, pretension elastic component 13 can be an annular, and pretension elastic component 13 can be along the extending circumferentially of seal ring 11.Through pretension elastic component 13 is set, thereby can seal ring 11 be pressed on the push rod 6, can further improve the sealing effect of seal ring 11 like this.Advantageously, pretension elastic component 13 can be a preloading spring, and said preloading spring can be sleeved on the top of seal ring 11, can make said fuel delivery pump structure more reasonable like this.
As shown in Figure 2; In an embodiment of the utility model; Said fuel transfer pump can also comprise sealing skeleton 12; The sealing skeleton 12 the bottom can be located on the seal ring 11, the sealing skeleton 12 top can and seal ring 11 between limit holding space, said preloading spring can be located in the said holding space.Through sealing skeleton 12 is set, not only can protect, and compare with said preloading spring to said preloading spring, sealing skeleton 12 can more closely cooperate with the wall of first receiving cavity 17.
In a concrete example of the utility model; As shown in Figure 2; Seal ring 11 can be provided with annular mounting groove and said mounting groove can be along the extending circumferentially (opening of said mounting groove makes progress, and wherein above-below direction is shown in the direction of arrow among Fig. 1 and Fig. 2) of seal ring 11.Sealing skeleton 12 can comprise the first vertical portion, horizontal part and the second vertical portion.Wherein, The said first vertical portion can be installed in the said mounting groove; One end of said horizontal part (end of the contiguous push rod 6 of said horizontal part) can link to each other with the upper end of the said first vertical portion; The lower end of the said second vertical portion can link to each other with the other end (end away from push rod 6 of said horizontal part) of said horizontal part, can limit said holding space between the said second vertical portion and the seal ring 11.In other words, sealing skeleton 12 can be Z-shaped substantially.Sealing skeleton 12 has advantage of simple structure like this.
Advantageously, the said first vertical portion, said horizontal part and the said second vertical portion can be integrally formed.So not only can improve the structural strength of sealing skeleton 12 widely, and can simplify the manufacturing process of sealing skeleton 12, the manufacture cost of reduction sealing skeleton 12 widely.
As shown in Figure 1, in an example of the utility model, oil cylinder 10 can be fixed on the lower end of the pump housing 1 through fastening piece (for example bolt).Wherein, said fastening piece can be a plurality of, and the spaced apart setting of said a plurality of fastening pieces is so that more firmly be fixed on oil cylinder 10 lower end of the pump housing 1.
It will be appreciated by persons skilled in the art that fuel transfer pump according to the utility model embodiment can also comprise parts such as fuel-displaced one-way valve 8, oil sucting one-way valve 9, hand pump assembly 3.Because above-mentioned parts are known and irrelevant with the model utility point of the utility model, therefore no longer describe in detail.
Fuel transfer pump according to the utility model embodiment can be to the DENG fuel feeding.See figures.1.and.2 below and describe working procedure according to the utility model embodiment's fuel transfer pump.When DENG was worked, the camshaft of cam drive 5 began rotation so that drive motor pump (it will be appreciated by persons skilled in the art that said motor pump mainly comprises inlet port joint 2, plunger 4, push rod 6, cam drive 5 etc.) work.Said motor pump work can be divided into for two steps, and the first step is the oil suction operating mode, and second step is for pressing oily operating mode.
The oil suction operating mode: cam drive 5 promotes push rod 6 and moves up; And then push rod 6 promotes the elastic force that plungers 4 overcome elastic component 7 (for example spring) and moves up (inlet port joint 2 can link to each other with plunger 4 through elastic component 7, and promptly an end of elastic component 7 can link to each other with inlet port joint 2 and the other end of elastic component 7 can link to each other with plunger 4).At this moment; The volume of the active chamber d of motor pump enlarges so that form certain degree of vacuum, and fuel-displaced one-way valve 8 is closed, and the volume of the compensated cavity f of motor pump dwindles; The compensated cavity f pressure of the fluid of storage in advance raises so that back down oil sucting one-way valve 9, flows to the active chamber d of motor pump.Rise to peak up to push rod 6, active chamber d accomplishes oil-absorbing process.
Press oily operating mode: when the camshaft of cam drive 5 when original position is rotated; Cam ejects the position progressively to be reduced; Elastic component 7 promotes plunger 4, push rod 6 moves downward; This moment, the volume of compensated cavity f was maximum and form certain degree of vacuum, and the outer fluid of the inlet port identical with atmospheric pressure gets into compensated cavity f, and compensated cavity f begins fluid and stores up in advance.The volume of active chamber d dwindles simultaneously, and fluid forms pressure, and oil sucting one-way valve 9 is closed; Fluid is opened fuel-displaced one-way valve 8 through passage e;, reduce as far as possible to main frame high-pressure service pump inlet port fuel feeding from oil outlet, accomplish the preparatory storage of fluid of compensated cavity f and the pressure oil process of active chamber d up to push rod 6.
The oil suction operating mode is a work cycle according to the utility model embodiment's fuel transfer pump with pressing oily operating mode, and said fuel transfer pump carries out said work cycle again and again so that through the outside pump oil of oil outlet.
In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means the concrete characteristic, structure, material or the characteristics that combine this embodiment or example to describe and is contained among at least one embodiment or example of the utility model.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete characteristic, structure, material or the characteristics of description can combine with suitable manner in any one or more embodiments or example.
Although illustrated and described the embodiment of the utility model; Those having ordinary skill in the art will appreciate that: under the situation of principle that does not break away from the utility model and aim, can carry out multiple variation, modification, replacement and modification to these embodiments, the scope of the utility model is limited claim and equivalent thereof.
Claims (9)
1. a fuel transfer pump is characterized in that, comprising:
The pump housing has first receiving cavity and the said pump housing and is provided with and unloads oilhole in the said pump housing;
Oil cylinder has the lower end that second receiving cavity and said oil cylinder are fixed on the said pump housing in the said oil cylinder, wherein said second receiving cavity is communicated with said first receiving cavity;
Cam drive, said cam drive are located in said second receiving cavity;
Push rod, said push rod links to each other with said cam drive; With
Seal ring; Said seal ring be fixed on the wall of said first receiving cavity and said ring set on said push rod; The oil groove and said of unloading that wherein said seal ring is provided with annular unloads the extending circumferentially of oil groove along said seal ring, and the said oilhole that unloads is communicated with the said oil groove that unloads.
2. fuel transfer pump according to claim 1 is characterized in that the bottom of said seal ring is provided with the lip limit.
3. fuel transfer pump according to claim 1 is characterized in that, also comprises the pretension elastic component, and said pretension elastic component is sleeved on the said seal ring.
4. fuel transfer pump according to claim 3 is characterized in that, said pretension elastic component is a preloading spring, and said preloading spring is sleeved on the top of said seal ring.
5. fuel transfer pump according to claim 4; It is characterized in that, also comprise the sealing skeleton, the bottom of said sealing skeleton is located on the said seal ring; Limit holding space between the top of said sealing skeleton and the said seal ring, said preloading spring is located in the said holding space.
6. fuel transfer pump according to claim 5 is characterized in that, said seal ring is provided with the extending circumferentially of the said seal ring of mounting groove and said mounting groove edge of annular, and said sealing skeleton comprises:
The first vertical portion, the said first vertical portion is installed in the said mounting groove;
Horizontal part, an end of said horizontal part links to each other with the upper end of the said first vertical portion; With
The second vertical portion, the lower end of the said second vertical portion links to each other with the other end of said horizontal part, limits said holding space between the wherein said second vertical portion and the said seal ring.
7. fuel transfer pump according to claim 6 is characterized in that, the said first vertical portion, said horizontal part and the said second vertical portion are integrally formed.
8. fuel transfer pump according to claim 1 is characterized in that, said oil cylinder is fixed on the lower end of the said pump housing through fastening piece.
9. fuel transfer pump according to claim 8 is characterized in that, said fastening piece is a plurality of, the spaced apart setting of said a plurality of fastening pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201434574U CN202493366U (en) | 2012-04-09 | 2012-04-09 | Fuel oil delivery pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201434574U CN202493366U (en) | 2012-04-09 | 2012-04-09 | Fuel oil delivery pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202493366U true CN202493366U (en) | 2012-10-17 |
Family
ID=46999598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201434574U Expired - Fee Related CN202493366U (en) | 2012-04-09 | 2012-04-09 | Fuel oil delivery pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202493366U (en) |
-
2012
- 2012-04-09 CN CN2012201434574U patent/CN202493366U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Hu Qingfang Inventor after: Yi Bin Inventor before: Hu Qingfang Inventor before: Yi Bin |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121017 Termination date: 20180409 |