CN204878107U - Throttle overflow valve - Google Patents
Throttle overflow valve Download PDFInfo
- Publication number
- CN204878107U CN204878107U CN201520640772.1U CN201520640772U CN204878107U CN 204878107 U CN204878107 U CN 204878107U CN 201520640772 U CN201520640772 U CN 201520640772U CN 204878107 U CN204878107 U CN 204878107U
- Authority
- CN
- China
- Prior art keywords
- valve
- overflow
- spool
- valve body
- throttling
- 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
Links
Landscapes
- Safety Valves (AREA)
Abstract
本实用新型公开了一种节流溢流阀，由阀体、弹簧、阀盖、阀芯组成；其特征是：阀体内部为柱形空腔且后端为敞口，阀体前端部设进油口，前侧部设溢油口；阀体后端与阀盖扣合；阀芯置于空腔内，弹簧置于阀芯后部；阀芯前端设节流孔，前侧部设溢流孔，当阀芯前端抵靠阀体前端时阀芯的溢流孔与阀体的溢流口联通，节流孔与溢流孔联通。本实用新型节流溢流阀为单一结构，结构简单，体积小、反应灵敏，解决泵的低速（转速小于100r/min）运转，同时起到系统超载保护作用。该节流溢流阀与普通安全阀相比，还具有小幅压力波动响应快，同时具有压力过载保护功能，溢流时压力超调也比较小等优点。
The utility model discloses a throttling and overflow valve, which is composed of a valve body, a spring, a valve cover and a valve core; Oil port, the front side is provided with an oil spill port; the rear end of the valve body is fastened with the bonnet; the valve core is placed in the cavity, and the spring is placed at the rear of the valve core; An orifice, when the front end of the valve core abuts against the front end of the valve body, the overflow hole of the valve core communicates with the overflow port of the valve body, and the throttle hole communicates with the overflow hole. The throttling and overflow valve of the utility model has a single structure, simple structure, small volume and sensitive response, which solves the problem of low-speed (rotating speed less than 100r/min) operation of the pump and at the same time plays the role of system overload protection. Compared with ordinary safety valves, this throttling and overflow valve also has the advantages of quick response to small pressure fluctuations, pressure overload protection function, and relatively small pressure overshoot during overflow.
Description
Technical field
The utility model relates to a kind of throttling relief valve for hydraulic system, particularly relates to a kind of throttling relief valve of the pump control hydraulic system for driven by servomotor.
Background technique
Along with the pump control hydraulic system of driven by servomotor is applied, also more and more higher to the requirement of pump control on market, require that large discharge, highi degree of accuracy control, energy-conservation, this falls.In pump pressure maintaining period, revolution speed is lower, and often lower than 100r/min, now volumetric efficiency is lower, has a certain impact to the use of pump.
Throttle valve and relief valve are components and parts conventional in hydraulic system, and throttling relief valve is also common hydraulic element, is a kind of pressure compensation type throttle valve.Existing throttling relief valve is generally formed in parallel by relief valve and throttle valve.The high pressure oil p of inlet, a part goes to actuator through throttle valve, and another part to deoil case through the flow-off of relief valve.Relief valve upper and lower end communicates with the pressure oil before and after throttle valve respectively.When outlet pressure increases, spool moves down, and turns down flow-off, and spillage drag increases, and inlet pressure p increases thereupon, and the pressure reduction thus before and after throttle valve remains unchanged substantially; Vice versa.Namely the impact of load is not substantially subject to by the flow of valve.Although throttle valve and relief valve can be made of one by some existing throttling relief valve, be still structurally two absolute construction, complex structure, amount of parts is more, and fabricating cost is high.
Model utility content
Technical problem to be solved in the utility model is, overcomes the defect that prior art exists, provides a kind of throttling relief valve; for single structure, structure is simple, and volume is little, be quick on the draw; solve low speed (rotating speed the is less than 100r/min) running of pump, play system overcharge protective action simultaneously.
Throttling relief valve of the present utility model, is made up of valve body, spring, valve gap, spool; It is characterized in that: valve inner is cylindrical cavity and rear end is uncovered, and valve body front end establishes filler opening, and front side portion establishes oil spilling mouth; Valve rear end and valve gap fasten; Spool is placed in cavity, and spring is placed in spool rear portion; Throttle orifice is established in spool front end, and front side portion establishes overflow hole, when the overflow hole of spool front end against spool during valve body front end and the flow-off UNICOM of valve body, and throttle orifice and overflow hole UNICOM.
Optimum scheme is: the throttle orifice degree of depth h of spool and diameter d ratio are 0.5, k is thin wall small hole.
When reynolds' number is greater than critical value, flow coefficient C d is temperature influence not, when pressure is constant, can not be subject to the impact of temperature by the flow of throttle orifice k, guarantee the accurate control of pressurize value.If the appearance of abnormal pressure fuctuation within a narrow range of actuator, when the pressure reduction of throttle orifice increases, have more fluid and pass through, when the pressure reduction of throttle orifice reduces, fluid also can correspondingly be reduced by throttle orifice, is conducive to the accurate control of system dwell pressure like this.When significantly raising appears in the pressure of actuator, cannot pass through throttle orifice in time, now fluid pushes spring pressure release open, realizes pressure protect.This throttling relief valve, compared with common safety valve, also has small size pressure surge response fast, has pressure overload protection function simultaneously, the pressure overshoot also advantage such as smaller during overflow.
Accompanying drawing explanation
Fig. 1 is throttling structure of relief valve generalized section of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is elaborated.
Fig. 1 is the utility model throttling structure of relief valve generalized section, is made up of valve body 1, spring 2, cover plate 3, spool 4, and valve inner is cylindrical cavity and rear end is uncovered, and valve body front end establishes filler opening 7, and front side portion establishes oil spilling mouth 6; Valve rear end and valve gap fasten (screw thread tight seal); Spool is placed in cavity, and spring is placed in spool rear portion, and spool front end is against valve body front end; Spool is hollow, and throttle orifice k is established in its front end, and front side portion establishes overflow hole 5 and when the overflow hole 5 of spool front end against spool during valve body front end and flow-off 6 UNICOM of valve body.The degree of depth h of the throttle orifice k on spool and diameter d ratio are 0.5, are thin wall small hole.When reynolds' number is greater than critical value, flow coefficient C d is temperature influence not, when dwell pressure is constant, can not be subject to the impact of temperature by the flow of throttle orifice k, guarantee the accurate control of pressurize value.When the appearance of abnormal pressure fuctuation within a narrow range of oil hydraulic press, when the pressure reduction of throttle orifice k increases, have more fluid and pass through, when the pressure reduction of throttle orifice k reduces, fluid also can correspondingly be reduced by throttle orifice k, is conducive to the accurate control of system dwell pressure like this.When significantly raising appears in the pressure of oil hydraulic press, cannot pass through throttle orifice k in time, the fluid now in system pushes spring 2 pressure release open, realizes pressure protect.This throttling relief valve, compared with common safety valve, also has small size pressure surge response fast, has pressure overload protection function simultaneously.
Claims (2)
1. a throttling relief valve, is made up of valve body, spring, valve gap, spool; It is characterized in that: valve inner is cylindrical cavity and rear end is uncovered, and valve body front end establishes filler opening, and front side portion establishes oil spilling mouth; Valve rear end and valve gap fasten; Spool is placed in cavity, and spring is placed in spool rear portion; Throttle orifice is established in spool front end, and front side portion establishes overflow hole, when the overflow hole of spool front end against spool during valve body front end and the flow-off UNICOM of valve body, and throttle orifice and overflow hole UNICOM.
2. throttling relief valve according to claim 1, is characterized in that: the degree of depth in throttling spool hole and diameter ratio are 0.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520640772.1U CN204878107U (en) | 2015-08-24 | 2015-08-24 | Throttle overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520640772.1U CN204878107U (en) | 2015-08-24 | 2015-08-24 | Throttle overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204878107U true CN204878107U (en) | 2015-12-16 |
Family
ID=54822484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520640772.1U Expired - Lifetime CN204878107U (en) | 2015-08-24 | 2015-08-24 | Throttle overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204878107U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041754A (en) * | 2015-08-24 | 2015-11-11 | 南京埃斯顿自动化股份有限公司 | Throttling overflow valve |
| CN113719656A (en) * | 2021-08-30 | 2021-11-30 | 华中科技大学 | Follow-up valve core assembly, direct-acting overflow valve and pilot-operated overflow valve |
-
2015
- 2015-08-24 CN CN201520640772.1U patent/CN204878107U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041754A (en) * | 2015-08-24 | 2015-11-11 | 南京埃斯顿自动化股份有限公司 | Throttling overflow valve |
| CN113719656A (en) * | 2021-08-30 | 2021-11-30 | 华中科技大学 | Follow-up valve core assembly, direct-acting overflow valve and pilot-operated overflow valve |
| CN113719656B (en) * | 2021-08-30 | 2022-06-14 | 华中科技大学 | Follow-up valve core assembly, direct-acting overflow valve and pilot-operated overflow valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105041754A (en) | Throttling overflow valve | |
| CN206513903U (en) | A kind of high-pressure fluid check valve | |
| CN101776200B (en) | Variable-pressure overflow valve used for lubricating | |
| CN204878107U (en) | Throttle overflow valve | |
| CN211315256U (en) | A large flow variable pressure difference automatic constant flow valve | |
| CN103363163A (en) | Decompression valve for electro-hydraulic servo injection modeling machine | |
| CN205117709U (en) | Pressure limiting valve of oil pump | |
| CN202209456U (en) | Differential safety valve | |
| CN204267803U (en) | Pilot operated check valve | |
| CN207486154U (en) | A kind of deep supervoltage sea water speed governing valve in full sea | |
| CN202520680U (en) | Novel direct-acting overflow valve | |
| CN203614485U (en) | Overflow valve | |
| CN203892648U (en) | Differential safety valve and oil inlet connecting plate assembly with same | |
| CN203731067U (en) | Bridge rectifying valve block for bilateral backing pump | |
| MY147826A (en) | Miniflow valve | |
| CN203516093U (en) | Pressure and flow control valve of steering oil pump | |
| CN204704184U (en) | Relief valve | |
| CN205243999U (en) | Prevent flame -out hydraulic system off -load electromagnetism valves of engine low -speed | |
| CN201687791U (en) | Rectifier valve sealed by spherical surface | |
| CN203421244U (en) | Direct-acting pressure reduction valve | |
| CN204201243U (en) | Valve control mechanism | |
| CN107990021B (en) | A kind of direct-acting triple pressure reducing valve with pressure feedback structure | |
| CN205277953U (en) | Automobile parts machine tool's hydraulic pressure station | |
| CN206280320U (en) | A kind of radiator control valve group | |
| CN204344583U (en) | A kind of activated actuator pump system with pressurize balanced protection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A throttle relief valve Effective date of registration: 20220803 Granted publication date: 20151216 Pledgee: Nanjing Branch of Jiangsu Bank Co.,Ltd. Pledgor: NANJING ESTUN AUTOMATION Co. Registration number: Y2022320000430 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230630 Granted publication date: 20151216 Pledgee: Nanjing Branch of Jiangsu Bank Co.,Ltd. Pledgor: NANJING ESTUN AUTOMATION Co. Registration number: Y2022320000430 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20151216 |