CN202545911U - Unloading valve - Google Patents
Unloading valve Download PDFInfo
- Publication number
- CN202545911U CN202545911U CN201220136355XU CN201220136355U CN202545911U CN 202545911 U CN202545911 U CN 202545911U CN 201220136355X U CN201220136355X U CN 201220136355XU CN 201220136355 U CN201220136355 U CN 201220136355U CN 202545911 U CN202545911 U CN 202545911U
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- China
- Prior art keywords
- valve
- spool
- valve body
- opening
- spring
- 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 - Lifetime
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Abstract
The utility model relates to a valve, in particular to an unloading valve. Valve holes of a valve body include a left valve hole and a right valve hole; the inner wall of the left valve hole is in interference fit with a valve core; a spring is arranged between the inner wall of the right valve hole and the valve core; one end of the spring is pressed against a fixing sheet arranged on the circumference of the valve core; the other end of the spring is pressed against a pressure adjusting bolt arranged at the right end of the valve body; the circumference of a body at the top end of the valve core is provided with a groove which is matched with an oil outlet; the groove is communicated with a blind hole in the valve core; and the open end of the blind hole in the valve core is communicated with an oil return port. The conventional diaphragm type structure is changed into a piston type structure, so that pressure adjustment is more stable, and the pressure fluctuating range is shortened; a steel valve core is adopted, so that the defect of unstable performance caused by the change of a rubber sealing piece along with the ambient temperature, salt mist, corrosion and the like is overcome; and the unloading valve is simple in structure, the quantity of components is small, and production cost and production process are reduced.
Description
Technical field
The utility model relates to a kind of valve, is specially a kind of unloading valve.
Background technique
The unloading function of unloading valve all is by outside pressure controlled of valve, usually by off-load be valve inlet pressure, thereby reach the balance of pressure in hydraulic pressure or the pressure system.In the existing unloading valve product, majority is the diaphragm type unloading valve, and its pressure regulation range of the unloading valve of this structure is along with the improve of pressure unloading, and the pressure regulation range is also increasing, the instability that this regulates with regard to build-up of pressure.
The model utility content
To the problem that exists in the existing technology, the purpose of the utility model is to provide a kind of technological scheme of unloading valve.
Described unloading valve comprises valve body and spool, and the valve opening left end of valve body is a filler opening; The valve opening right-hand member of valve body is a return opening; At the arranged outside O of valve body left end RunddichtringO, set out hydraulic fluid port on the valve body on O RunddichtringO right side, it is characterized in that: the valve opening of valve body is divided into left valve opening and right valve opening; Left side valve opening inwall and spool interference fit; Between right valve opening inwall and the spool spring is set, spring one end apical grafting is arranged on the fixed plate on the spool circumference, and spring the other end apical grafting is arranged on the regulator bolts of valve body right-hand member; Spool left end body circumference is provided with the groove that matches with oil outlet, and this groove communicates with the interior blind hole of spool, and the opening end of blind hole communicates with return opening in the spool.
Described unloading valve is characterized in that described valve body right-hand member outer wall is provided with the lock screw that cooperates with the regulator bolts apical grafting.
Described unloading valve is characterized in that described regulator bolts is a hollow-core construction.
Described unloading valve is characterized in that described spool and valve body are slidingly matched.
The utility model changes existing diaphragm type structure into piston cylinder operator, and it is more stable that pressure is regulated, and the pressure surge scope is littler; Adopt the steel part spool, avoided receiving variation such as ambient temperature, salt fog, corrosion and the defective of the unstable properties that causes with rubber seal; Simple in structure, parts are few, reduced cost of production and manufacturing procedure.
Description of drawings
Fig. 1 is the structural representation of the utility model normal working;
Fig. 2 is the structural representation of the utility model unloading condition;
Among the figure: the 1-valve body; The 2-groove; The 3-spring; The 4-lock screw; The 5-regulator bolts; The 6-return opening; The 7-fixed plate; The 8-blind hole; The 9-oil outlet; The 10-O RunddichtringO; The 11-filler opening; The 12-spool.
Embodiment
Below in conjunction with Figure of description the utility model is further specified:
Unloading valve comprises valve body 1 and spool 12, and spool 12 is slidingly arranged in the valve body 1; The valve opening left end of valve body 1 is a filler opening 11, and the valve opening right-hand member of valve body 1 is a return opening 6, at the arranged outside O RunddichtringO 10 of valve body 1 left end; Set out hydraulic fluid port 9 on the valve body 1 on O RunddichtringO 10 right sides, the valve opening of valve body 1 is divided into left valve opening and right valve opening, left valve opening inwall and spool 12 interference fit; Between right valve opening inwall and the spool 12 spring 3 is set, spring 3 one end apical graftings are arranged on the fixed plate 7 on the spool circumference, and spring 3 the other end apical graftings are arranged on the regulator bolts 5 of valve body right-hand member; Regulator bolts 5 is a hollow-core construction, and with valve body 1 threaded, valve body 1 right-hand member outer wall is provided with the lock screw 4 that cooperates with regulator bolts 5 apical graftings; Lock screw 4 can play the effect of location regulator bolts 5, prevents that pressure is excessive and makes regulator bolts 5 instabilities; Spool 12 left end body circumference are provided with the groove 2 that matches with oil outlet, and this groove 2 communicates with spool 12 interior blind holes 8, and the opening end of blind holes 8 communicates with return opening 6 in the spool 12.
This unloading valve can be used in the multiple different pipeline, plays the off-load effect.
Matching with the oil pump of unloading valve and grease lubrication system is combined into example, describes its working principle in detail:
Pressurized state is as shown in Figure 1, and when oil pump was worked, spool was at oil pressure effect lower compression spring; This moment, filler opening was communicated with oil outlet, and system begins fuel feeding, when pressure fuel pump and spring force balance; Spool left end and oil outlet keep certain clearance, and gap length can be through the adjustment regulator bolts;
Unloading condition is as shown in Figure 2; When oil pump quits work; Spool resets under the effect of spring, and groove that is provided with on the spool left end circumference and the oil outlet on the valve body are complementary, and the grease of lubrication system pipeline the inside flow back into fuel tank through the oil outlet of valve body, blind hole, the return opening in the spool; Because the adhesion effect of grease makes the pipeline can appearance of negative pressure, just can return air in the pipeline, so just get ready for fuel feeding next time.
Claims (4)
1. unloading valve comprises valve body and spool, and the valve opening left end of valve body is a filler opening; The valve opening right-hand member of valve body is a return opening; At the arranged outside O of valve body left end RunddichtringO, set out hydraulic fluid port on the valve body on O RunddichtringO right side, it is characterized in that: the valve opening of valve body is divided into left valve opening and right valve opening; Left side valve opening inwall and spool interference fit; Between right valve opening inwall and the spool spring is set, spring one end apical grafting is arranged on the fixed plate on the spool circumference, and spring the other end apical grafting is arranged on the regulator bolts of valve body right-hand member; Spool left end body circumference is provided with the groove that matches with oil outlet, and this groove communicates with the interior blind hole of spool, and the opening end of blind hole communicates with return opening in the spool.
2. unloading valve according to claim 1 is characterized in that described valve body right-hand member outer wall is provided with the lock screw that cooperates with the regulator bolts apical grafting.
3. unloading valve according to claim 1 is characterized in that described regulator bolts is a hollow-core construction.
4. unloading valve according to claim 1 is characterized in that described spool and valve body are slidingly matched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220136355XU CN202545911U (en) | 2012-03-31 | 2012-03-31 | Unloading valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220136355XU CN202545911U (en) | 2012-03-31 | 2012-03-31 | Unloading valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202545911U true CN202545911U (en) | 2012-11-21 |
Family
ID=47166549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220136355XU Expired - Lifetime CN202545911U (en) | 2012-03-31 | 2012-03-31 | Unloading valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202545911U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104088845A (en) * | 2014-07-22 | 2014-10-08 | 株洲市文佳实业有限公司 | Passive overpressure unloading valve |
| CN104321573A (en) * | 2012-05-23 | 2015-01-28 | 罗伯特·博世有限公司 | Pressure limiting valve and fuel injecion plant for an internal combustion engine comprising said pressure limiting valve |
| CN105065736A (en) * | 2015-07-14 | 2015-11-18 | 上海交通大学 | Load self-adaptive safety valve adopting changeable throttling orifice |
| CN108590861A (en) * | 2018-03-06 | 2018-09-28 | 中国航发哈尔滨东安发动机有限公司 | A kind of Fuel Bleed Valve |
| CN109268332A (en) * | 2018-11-15 | 2019-01-25 | 广西柳工机械股份有限公司 | High-low pressure unloading valve and loader hydraulic system |
-
2012
- 2012-03-31 CN CN201220136355XU patent/CN202545911U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104321573A (en) * | 2012-05-23 | 2015-01-28 | 罗伯特·博世有限公司 | Pressure limiting valve and fuel injecion plant for an internal combustion engine comprising said pressure limiting valve |
| CN104088845A (en) * | 2014-07-22 | 2014-10-08 | 株洲市文佳实业有限公司 | Passive overpressure unloading valve |
| CN105065736A (en) * | 2015-07-14 | 2015-11-18 | 上海交通大学 | Load self-adaptive safety valve adopting changeable throttling orifice |
| CN108590861A (en) * | 2018-03-06 | 2018-09-28 | 中国航发哈尔滨东安发动机有限公司 | A kind of Fuel Bleed Valve |
| CN109268332A (en) * | 2018-11-15 | 2019-01-25 | 广西柳工机械股份有限公司 | High-low pressure unloading valve and loader hydraulic system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121121 |
|
| CX01 | Expiry of patent term |