CN104405937A - Check valve structure for fuel oil pump - Google Patents
Check valve structure for fuel oil pump Download PDFInfo
- Publication number
- CN104405937A CN104405937A CN201410663837.4A CN201410663837A CN104405937A CN 104405937 A CN104405937 A CN 104405937A CN 201410663837 A CN201410663837 A CN 201410663837A CN 104405937 A CN104405937 A CN 104405937A
- Authority
- CN
- China
- Prior art keywords
- valve body
- valve
- valve rod
- cylinder
- oil outlet
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
- F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a check valve structure for a fuel oil pump. The check valve structure comprises an oil outlet casing, a valve rod, a valve rod, a valve and a valve rod guide part, wherein the valve rod is arranged in the oil outlet casing, the valve body is fixedly connected with the end part of the valve rod, the valve is matched with the valve body to be closed, the valve rod guide part is arranged in the oil outlet casing, one end, far away from the valve body, of the valve rod is arranged in the valve rod guide part, the valve rod is matched with the valve rod guide part to realize the guide, in addition, a check spring is arranged outside the valve rod, one end of the check spring is abutted against the valve body, and the other end of the check spring is abutted against the valve body guide part. After the technical scheme is adopted, the check spring can be stably fixed on the valve rod under the condition that the fuel oil pressure fluctuates, the falling is avoided, meanwhile, through the matched guide of the valve rod guide part and the valve rod, the centering performance of the linear reciprocating movement of the valve rod is realized, and the defect that the sealing between the valve body and the valve door is not tight is overcome.
Description
Technical field
The present invention relates to fuel oil supply system technical field, be specifically related to a kind of check valve structure of fuel pump.
Background technique
Vehicle fuel supply system requires still to keep certain pressure after car load is flame-out, therefore arranges check valve structure at the oil outlet place of fuel pump, after cut-out of fuel pump, stops the fuel oil reverse flow of system pipeline, with the pressure in keeping system pipeline.
Existing fuel pump check valve structure, as shown in Figure 1, check valve 4 ' is provided with in oil outlet housing 1 ', seam valve body 2 ' is resisted against the opening of check valve 4 ', check valve body 2 ' is provided with the first cone boss 21 ', integrated second cone boss 11 ' is provided with in oil outlet housing 1 ', the small end of the first cone boss 21 ' and the second cone boss 11 ' is disposed adjacent, and check spring 3 ' is set between, fuel oil enters from check valve 4 ', fuel pressure forces check spring 3 ' compresses, check valve body 2 ' is opened, work as cut-out of fuel pump, check spring 3 ' applies spring-return power on check valve body 2 ', fuel oil is closed in oil outlet housing 1 '.
But, in existing structure, check spring 3 ' is set on two cone bosses, and check spring 3 ' and adjacent component are without being connected, when fuel oil acts on check valve body 2 ', the direction of its active force is disorderly and unsystematic, do not have rule, easily causes check spring 3 ' torsional deformation and comes off, simultaneously, due to when check valve body 2 ' moves without guide structure,, there is deflection, cause with check valve 4 ' poorly sealed in the movement locus that during return, easy disengaging affected by vibration is preset.
Summary of the invention
The invention provides a kind of check valve structure of fuel pump, the reliability of check valve body motion can be improved, realize the excellent sealing of check valve body and check valve, and avoid coming off of check spring.
To achieve these goals, this invention takes following technological scheme:
A kind of check valve structure of fuel pump, comprise oil outlet housing, the valve rod be located in described oil outlet housing, be fixed in described valve stem end valve body, coordinate the valve of locking with described valve body, also comprise the stem guiding portion be located in described oil outlet housing, described valve rod is located in described stem guiding portion away from one end of described valve body, described valve rod coordinates with described stem guiding portion and leads, and be provided with check spring outside described valve rod, one end of described check spring and described valve body against, the other end and described valve body guide portion against.
Preferably, described stem guiding portion comprises the end being located at described oil outlet housing and the cylinder extended in described oil outlet housing, and described valve rod coordinates with described cylinder and leads.
Preferably, described stem guiding portion comprises the first cylinder, second cylinder of coaxial line, with the connecting tendon being connected described first cylinder and described second, described first cylinder and described oil outlet housing affixed, described second cylinder coordinates with described valve rod and leads.
Preferably, described connecting tendon is located at the outer wall of described second cylinder and is connected with described first cylinder along its axial extension.
Preferably, the inwall of described oil outlet housing is provided with the first groove, and described first cylinder setting-in is fixed in described first groove.
Preferably, be also provided with valve body stop part, described valve body stop part is located at described valve body and is entered within the stroke of pump core.
Preferably, described valve body stop part comprises three bar shaped muscle, and each described bar shaped muscle radially intersects at axle center place from the inwall of described valve respectively.
Preferably, described valve rod is provided with installation base, and described valve body is provided with mounting groove, and described installation base is flush-mounted in described mounting groove.
Preferably, described valve is provided with conical surface near the opening end of described valve body, and described conical surface coordinates locking with the outer wall of described valve body.
Preferably, described oil outlet housing and described stem guiding portion are acetal plastic part, and described valve body is oil resistant rubber part.
The beneficial effect that the present invention obtains is:
The invention provides a kind of check valve structure of fuel pump, comprise oil outlet housing, the valve rod be located in described oil outlet housing, be fixed in described valve stem end valve body, coordinate the valve of locking with described valve body, also comprise the stem guiding portion be located in described oil outlet housing, described valve rod is located in described stem guiding portion away from one end of described valve body, described valve rod coordinates with described stem guiding portion and leads, and be provided with check spring outside described valve rod, one end of described check spring and described valve body against, the other end and described valve body guide portion against.Adopt technique scheme, when there is fluctuation in fuel pressure, check spring still can be stable be fixed on valve rod, avoid and come off, simultaneously, to be coordinated with valve rod by stem guiding portion and lead, achieve the centering of valve rod straight reciprocating motion, improve valve body and the not tight defect of valve seal.
Accompanying drawing explanation
Fig. 1 is the sectional view of the check valve structure of prior art;
Fig. 2 is the half sectional view of an embodiment of check valve structure of the present invention;
Fig. 3 is the half sectional view of an embodiment of oil outlet housing of the present invention;
Fig. 4 is the partial sectional view of an embodiment of oil outlet housing of the present invention;
Fig. 5 is the axonometric drawing of an embodiment in stem guiding portion of the present invention;
Fig. 6 is the sectional view of an embodiment of oil outlet housing of the present invention and stem guiding portion cooperating structure;
Fig. 7 is the sectional view of an embodiment of the linkage structure of valve rod of the present invention and valve body.
Description of reference numerals:
1 '-oil outlet housing; 11 '-the second cone boss; 2 '-seam valve body; 3 '-check spring; 4 '-check valve; 21 '-the first cone boss; 10-oil outlet housing; 11-first groove; 12-guide surface; 20-valve rod; 21-installation base; 30-valve body; 31-mounting groove; 40-valve; 41-conical surface; 50-check spring; 60-stem guiding portion; 61-first cylinder; 62-second cylinder; 63-connecting tendon; 70-valve body stop part; 100-check valve structure.
Embodiment
In order to make those skilled in the art better understand technological scheme of the present invention, below in conjunction with accompanying drawing, the present invention is described in detail.
Shown in composition graphs 2-7, the invention provides a kind of check valve structure 100 of fuel pump, comprise oil outlet housing 10, be located at the valve rod 20 in oil outlet housing 10, be fixed in the valve body 30 of valve rod 20 end, the valve 40 of locking is coordinated with valve body 30, in order to improve the defect of prior art, invention has been following technological improvement: also comprise the stem guiding portion 60 be located in oil outlet housing 10, valve rod 20 is located in stem guiding portion 60 away from one end of valve body 30, valve rod 20 coordinates with stem guiding portion 60 and leads, and be provided with check spring 50 outside valve rod 20, one end of check spring 50 and valve body 30 against, the other end and valve body 30 guide portion against.Adopt technique scheme, when there is fluctuation in fuel pressure, check spring 50 still can be stable be fixed on valve rod 20, avoid and come off, simultaneously, to be coordinated with valve rod 20 by stem guiding portion 60 and lead, achieve the centering of valve rod 20 straight reciprocating motion, improve the defect that valve body 30 is poorly sealed with valve 40.
In above-mentioned structure, there is various embodiments in stem guiding portion 60, as embodiment one: arrange at the outer wall of valve rod 20 boss in axial direction extended, the inwall of oil outlet housing 10 arranges chute, and boss is slidably connected to realization in chute and coordinates guiding; For another example embodiment two: stem guiding portion 60 comprises the end being located at oil outlet housing 10 and the cylinder extended to oil outlet housing 10 inside, valve rod 20 coordinates with cylinder and leads, in sum, embodiment two comparatively embodiment one compares, structure is relatively simple, and avoids and on oil outlet housing 10, offer chute weaken himself intensity.But, consider the structure bulkier of embodiment two, in order to overcome this defect, the present invention is preferably as follows embodiment three: stem guiding portion 60 comprises the first cylinder 61, second cylinder 62 of coaxial line, with the connecting tendon 63 of connection first cylinder 61 and the second cylinder 62, first cylinder 61 is affixed with oil outlet housing 10, and the second cylinder 62 coordinates with valve rod 20 and leads.Integrally-built cylinder is optimized for the first cylinder 61 and the second cylinder 62 of Split type structure by this scheme, and it is affixed with oil outlet housing 10 by the first cylinder 61, second cylinder 62 coordinates with valve rod 20 and leads, and both saves material, and achieves again the lightweight of fuel oil pump assembly.
And further, connecting tendon 63 is located at the outer wall of the second cylinder 62 and is axially connected with the first cylinder 61 along it, compare between the adjacent face that connecting tendon 63 is comparatively located at two cylinder by this scheme, join strength is strengthened, and the connecting tendon 63 in this scheme achieve simultaneously with check spring 50 against, the design simplified the structure.
Further, according to the structure of above-mentioned preferred valve body guide portion 60, the first cylinder 61 is preferably as follows linkage structure with oil outlet housing 10, and the inwall of oil outlet housing 10 is provided with the first groove 11, first cylinder 61 setting-in and is fixed in the first groove 11.Particularly, stem guiding portion 60 puts into oil outlet housing 10 from one end of the second cylinder 62, and the first cylinder 61 is press-fited in the first groove 11 of annular, then tightened up by the end of hot riveting technique by oil outlet housing 10, both realizations are fixed, this structural manufacturing process is simple, connects reliable, and saves the use of link.More preferably, conveniently install, the end of oil outlet housing 10 is provided with guide surface 12, and guide surface 12 reduces installation difficulty, improves installation efficiency.
In order to avoid valve body 30 depart from valve rod 20 time, valve body 30 enter pump core blocking fuel pump, check valve structure 100 provided by the invention is also provided with valve body stop part 70, and valve body stop part 70 is located at valve body 30 and is entered within the stroke of pump core.This structure, while guarantee fuel oil passes through smoothly, blocks valve body 30 and enters pump core initiation fuel pump failure.Valve body stop part 70 can be preferably as follows embodiment: it comprises three bar shaped muscle, and each bar shaped muscle radially intersects at axle center place from the inwall of valve 40 respectively.This scenario-frame is simple, and it is convenient to realize, and less to the circulating resistance of fuel oil.Certainly, valve body stop part 70 also can be set to other structures, as arranged projection at the inwall of valve 40, increases surface friction drag during relative movement between valve body 30 and valve 40, thus increases the difficulty that valve body 30 enters pump core.
Except above-mentioned embodiment avoids valve body 30 to enter except pump core, valve body 30 also can be avoided from another point of view to enter pump core, namely ensure the reliable connection of valve body 30 and valve rod 20, guarantee that both can not come off.Preferred embodiment is: valve rod 20 is provided with installation base 21, is provided with mounting groove 31 in valve body 30, and installation base 21 is flush-mounted in mounting groove 31.And due to valve body 30 preferred rubber material, before installation, make it expand by heating, embedded in mounting groove 31 by installation base 21, and be stablely after the cooling period coated on valve rod 20, this scheme reduces valve body 30 and to come off the probability of valve rod 20, and vibrational power flow is simple, it is convenient to realize.Certainly, also both also screw connecting structure can be adopted.
In order to improve the sealability of valve body 30 and valve 40, be preferably provided with conical surface 41 at valve 40 near the opening end of valve body 30, conical surface 41 coordinates locking with the inwall of valve body 30.This approach increases the area of contact between valve body 30 and valve 40, improve both fitment stability, strengthen sealability.
Check valve structure 100 provided by the invention, optimizes hydraulic fluid port housing 10 and stem guiding portion 60 is acetal plastic part; Valve body 30 is oil resistant rubber part, and polyoxymethylene has good oil resistance and self lubricity, extends the working life in oil outlet housing 10 and stem guiding portion 60, reduces assembling difficulty between the two; In like manner, the valve body 30 of oil resistant rubber material, can reduce greasy dirt to destructions such as its corrosional qualitative changes, extend its working life.
Although the present invention is described in conjunction with above embodiment, but the present invention is not limited to above embodiment, and just by the restriction of claim, related domain common technique personnel can easily modify to it and change, but do not leave essential idea of the present invention and scope.
Claims (10)
1. the check valve structure of a fuel pump, comprise oil outlet housing, the valve rod be located in described oil outlet housing, be fixed in described valve stem end valve body, coordinate the valve of locking with described valve body, it is characterized in that, also comprise the stem guiding portion be located in described oil outlet housing, described valve rod is located in described stem guiding portion away from one end of described valve body, described valve rod coordinates with described stem guiding portion and leads, and be provided with check spring outside described valve rod, one end of described check spring and described valve body against, the other end and described valve body guide portion against.
2. check valve structure according to claim 1, is characterized in that, described stem guiding portion comprises the end being located at described oil outlet housing and the cylinder extended in described oil outlet housing, and described valve rod coordinates with described cylinder and leads.
3. check valve structure according to claim 1, it is characterized in that, described stem guiding portion comprises the first cylinder, second cylinder of coaxial line, with the connecting tendon being connected described first cylinder and described second, described first cylinder and described oil outlet housing affixed, described second cylinder coordinates with described valve rod and leads.
4. check valve structure according to claim 3, is characterized in that, described connecting tendon is located at the outer wall of described second cylinder and is connected with described first cylinder along its axial extension.
5. check valve structure according to claim 3, is characterized in that, the inwall of described oil outlet housing is provided with the first groove, and described first cylinder setting-in is fixed in described first groove.
6. the check valve structure according to any one of claim 1-5, is characterized in that, is also provided with valve body stop part, and described valve body stop part is located at described valve body and is entered within the stroke of pump core.
7. check valve structure according to claim 6, is characterized in that, described valve body stop part comprises three bar shaped muscle, and each described bar shaped muscle radially intersects at axle center place from the inwall of described valve respectively.
8. the check valve structure according to any one of claim 1-5, is characterized in that, described valve rod is provided with installation base, and described valve body is provided with mounting groove, and described installation base is flush-mounted in described mounting groove.
9. the check valve structure according to any one of claim 1-5, is characterized in that, described valve is provided with conical surface near the opening end of described valve body, and described conical surface coordinates locking with the outer wall of described valve body.
10. the check valve structure according to any one of claim 1-5, is characterized in that, described oil outlet housing and described stem guiding portion are acetal plastic part, and described valve body is oil resistant rubber part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410663837.4A CN104405937A (en) | 2014-11-18 | 2014-11-18 | Check valve structure for fuel oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410663837.4A CN104405937A (en) | 2014-11-18 | 2014-11-18 | Check valve structure for fuel oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104405937A true CN104405937A (en) | 2015-03-11 |
Family
ID=52643588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410663837.4A Pending CN104405937A (en) | 2014-11-18 | 2014-11-18 | Check valve structure for fuel oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104405937A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108799525A (en) * | 2018-09-10 | 2018-11-13 | 陕西博菲特流体控制装备制造有限公司 | Needle-like pressure reducing valve pressure reduction structure with double centering guide frames |
| CN110905798A (en) * | 2019-12-31 | 2020-03-24 | 洪恩流体科技有限公司 | Automatic anti-overheating device for fire pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003286923A (en) * | 2002-03-28 | 2003-10-10 | Denso Corp | Check valve, and fuel pump module using the same |
| CN101749459A (en) * | 2008-12-09 | 2010-06-23 | 株式会社鹭宫制作所 | Check valve |
| CN102758941A (en) * | 2011-04-29 | 2012-10-31 | 浙江三花股份有限公司 | Refrigeration equipment and one-way valve thereof |
| CN103362711A (en) * | 2012-03-30 | 2013-10-23 | Ti集团自动推进系统有限责任公司 | Fuel system valve assembly |
| CN204226756U (en) * | 2014-11-18 | 2015-03-25 | 安徽江淮汽车股份有限公司 | A kind of check valve structure of fuel pump |
-
2014
- 2014-11-18 CN CN201410663837.4A patent/CN104405937A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003286923A (en) * | 2002-03-28 | 2003-10-10 | Denso Corp | Check valve, and fuel pump module using the same |
| CN101749459A (en) * | 2008-12-09 | 2010-06-23 | 株式会社鹭宫制作所 | Check valve |
| CN102758941A (en) * | 2011-04-29 | 2012-10-31 | 浙江三花股份有限公司 | Refrigeration equipment and one-way valve thereof |
| CN103362711A (en) * | 2012-03-30 | 2013-10-23 | Ti集团自动推进系统有限责任公司 | Fuel system valve assembly |
| CN204226756U (en) * | 2014-11-18 | 2015-03-25 | 安徽江淮汽车股份有限公司 | A kind of check valve structure of fuel pump |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108799525A (en) * | 2018-09-10 | 2018-11-13 | 陕西博菲特流体控制装备制造有限公司 | Needle-like pressure reducing valve pressure reduction structure with double centering guide frames |
| CN108799525B (en) * | 2018-09-10 | 2024-02-23 | 陕西博菲特流体控制装备制造有限公司 | Needle type pressure reducing valve pressure reducing structure with double centering guide structures |
| CN110905798A (en) * | 2019-12-31 | 2020-03-24 | 洪恩流体科技有限公司 | Automatic anti-overheating device for fire pump |
| CN110905798B (en) * | 2019-12-31 | 2024-05-24 | 洪恩流体科技有限公司 | Automatic overheat prevention device of fire pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104989764B (en) | Hole type viscous damper with hole length capable of being automatically adjusted | |
| US10054184B2 (en) | Guiding and sealing unit, particularly for a shock absorber rod | |
| CN104807259A (en) | Electronic expansion valve | |
| WO2015090676A1 (en) | High pressure pump | |
| KR102597661B1 (en) | Electronic expansion valve | |
| CN104405937A (en) | Check valve structure for fuel oil pump | |
| CN204226756U (en) | A kind of check valve structure of fuel pump | |
| CN104006023B (en) | One utilizes gap sealed plunger case | |
| CN204420135U (en) | Flow-rate adjustment piston type axial flow modulating valve | |
| KR102298611B1 (en) | buffer | |
| CN105134991A (en) | Novel cock valve | |
| CN217951085U (en) | Single-cycle oil pressure shock absorber compression valve system | |
| WO2010113636A1 (en) | Hydraulic cylinder | |
| CN104364553B (en) | Improvement in amortisseur | |
| CN210196563U (en) | Eccentric micro-pressure loss check valve | |
| CN204284461U (en) | Be applied to the back suction type high-speed breaking fluid control valve on hot melt adhesive glue rifle | |
| CN204900910U (en) | Novel plug valve | |
| CN205857181U (en) | A kind of pile chuck assembly | |
| CN110925344B (en) | Variable spring assembly | |
| US20150362085A1 (en) | Check valve | |
| CN203683079U (en) | Oil gas recovery self-sealing oil gun | |
| CN208564946U (en) | A kind of plunger sealing structure | |
| CN103244694B (en) | Piston type zero leakage stop valve | |
| CN104481966B (en) | A kind of structure of hydraulic cab trailing type oil cylinder | |
| CN2779134Y (en) | Cushioning type swing gate oil cylinder of concrete pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Applicant after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Applicant before: Anhui Jianghuai Automotive Co., Ltd. |
|
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150311 |