CN105041754A - Throttling overflow valve - Google Patents
Throttling overflow valve Download PDFInfo
- Publication number
- CN105041754A CN105041754A CN201510521758.4A CN201510521758A CN105041754A CN 105041754 A CN105041754 A CN 105041754A CN 201510521758 A CN201510521758 A CN 201510521758A CN 105041754 A CN105041754 A CN 105041754A
- Authority
- CN
- China
- Prior art keywords
- valve
- throttling
- overflow
- valve body
- spool
- 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
- 239000000945 filler Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/025—Pressure reducing valves
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a throttling overflow valve. The throttling overflow valve is composed of a valve body, a spring, a valve deck and a valve element. The throttling overflow valve is characterized in that a cylindrical cavity is formed in the valve body; the rear end of the valve body is open; an oil inlet is formed in the front end of the valve body; an oil overflow port is formed in the front side of the valve body; the rear end of the valve body is buckled to the valve deck; the valve element is arranged in the cavity; the spring is located behind the valve element; a throttling hole is formed in the front end of the valve element; an overflow hole is formed in the front side of the valve element; and when the front end of the valve element abuts against the front end of the valve body, the overflow hole of the valve element is communicated with the overflow port of the valve body, and the throttling hole is communicated with the overflow hole. The throttling overflow valve is of a single structure, is simple in structure, small in size and sensitive in response, solves low-speed (the rotation speed is smaller than 100r/min) running problem, and meanwhile has an overload protection function for a system. Compared with a common safety valve, the throttling overflow valve has the beneficial effects that a small-amplitude pressure fluctuation response is fast, meanwhile, the pressure overload protection function is achieved, and pressure over speed is small in the overflow process.
Description
Technical field
The present invention relates to a kind of throttling relief valve for hydraulic system, particularly relate 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.
Summary of the invention
Technical problem to be solved by this invention 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 invention, 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 invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is elaborated.
Fig. 1 is throttling structure of relief valve generalized section of the present invention, 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 |
|---|---|---|---|
| CN201510521758.4A CN105041754A (en) | 2015-08-24 | 2015-08-24 | Throttling overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510521758.4A CN105041754A (en) | 2015-08-24 | 2015-08-24 | Throttling overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105041754A true CN105041754A (en) | 2015-11-11 |
Family
ID=54448617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510521758.4A Pending CN105041754A (en) | 2015-08-24 | 2015-08-24 | Throttling overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105041754A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630578A (en) * | 2019-08-26 | 2019-12-31 | 中联重科股份有限公司 | Control valve and hydraulic control circuit |
| CN111692149A (en) * | 2020-05-25 | 2020-09-22 | 宁波华液机器制造有限公司 | Stacked three-way flow valve |
| CN114508876A (en) * | 2020-11-16 | 2022-05-17 | 广东美的制冷设备有限公司 | Throttle valve, air condensing units and air conditioner |
| CN115681243A (en) * | 2022-11-17 | 2023-02-03 | 徐州阿马凯液压技术有限公司 | Feedback overflow valve for negative flow control hydraulic system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3980095A (en) * | 1975-02-10 | 1976-09-14 | Mcavoy Dennis J | Power transmission |
| CN202007804U (en) * | 2011-03-30 | 2011-10-12 | 南京航海仪器二厂有限公司 | Throttle valve with pressure protection function |
| CN104196780A (en) * | 2014-09-18 | 2014-12-10 | 芜湖高昌液压机电技术有限公司 | Speed regulating loop for lifter outlet overflow throttling valve |
| CN204153230U (en) * | 2014-08-12 | 2015-02-11 | 常州福磊石材有限公司 | Anti-plugging one-way throttle valve |
| CN204878107U (en) * | 2015-08-24 | 2015-12-16 | 南京埃斯顿自动化股份有限公司 | Throttle overflow valve |
-
2015
- 2015-08-24 CN CN201510521758.4A patent/CN105041754A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3980095A (en) * | 1975-02-10 | 1976-09-14 | Mcavoy Dennis J | Power transmission |
| CN202007804U (en) * | 2011-03-30 | 2011-10-12 | 南京航海仪器二厂有限公司 | Throttle valve with pressure protection function |
| CN204153230U (en) * | 2014-08-12 | 2015-02-11 | 常州福磊石材有限公司 | Anti-plugging one-way throttle valve |
| CN104196780A (en) * | 2014-09-18 | 2014-12-10 | 芜湖高昌液压机电技术有限公司 | Speed regulating loop for lifter outlet overflow throttling valve |
| CN204878107U (en) * | 2015-08-24 | 2015-12-16 | 南京埃斯顿自动化股份有限公司 | Throttle overflow valve |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630578A (en) * | 2019-08-26 | 2019-12-31 | 中联重科股份有限公司 | Control valve and hydraulic control circuit |
| CN111692149A (en) * | 2020-05-25 | 2020-09-22 | 宁波华液机器制造有限公司 | Stacked three-way flow valve |
| CN114508876A (en) * | 2020-11-16 | 2022-05-17 | 广东美的制冷设备有限公司 | Throttle valve, air condensing units and air conditioner |
| CN115681243A (en) * | 2022-11-17 | 2023-02-03 | 徐州阿马凯液压技术有限公司 | Feedback overflow valve for negative flow control hydraulic system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151111 |