CN108644160A - A kind of overflow valve dynamic characteristic improvement device - Google Patents
A kind of overflow valve dynamic characteristic improvement device Download PDFInfo
- Publication number
- CN108644160A CN108644160A CN201810876223.2A CN201810876223A CN108644160A CN 108644160 A CN108644160 A CN 108644160A CN 201810876223 A CN201810876223 A CN 201810876223A CN 108644160 A CN108644160 A CN 108644160A
- Authority
- CN
- China
- Prior art keywords
- overflow valve
- valve
- displacement pump
- constant displacement
- overflow
- 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
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Classifications
-
- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- 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
-
- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
Abstract
The invention discloses a kind of overflow valve dynamic characteristics to improve device,Including hydraulic cylinder,Accumulator and fuel tank,The side of fuel tank is equipped with constant displacement pump,The liquid outlet of constant displacement pump is connected by the oil inlet of pipeline and hydraulic cylinder,First check valve is installed between constant displacement pump and hydraulic cylinder,There is the second check valve by Pipe installing between constant displacement pump and the first check valve,There is spill valve in the outlet of second check valve by Pipe installing,A kind of overflow valve dynamic characteristic of the present invention improves device,First overflow valve,The design of second overflow valve and third overflow valve parallel connection,By the pre compressed magnitude for adjusting respective spring,The Opening pressure of the three direct-acting overflow valves formula that is stepped is set gradually to increase,It is gradually reduced in the identical amount of opening formula of being stepped of pressure,In this way when spill valve by a step signal (flow Q) in the case where being impacted suddenly,Hydraulic oil will reduce the impact of system.
Description
Technical field
The present invention relates to a kind of overflow valve, more particularly to a kind of overflow valve dynamic characteristic improves device.
Background technology
In coal working face, severe due to working environment, the working condition of mechanical part inevitably can be by some shadows
Ring make its can not quickly, precisely, stablize effective work, so for improving mechanical equipment sensitivity and stability to closing weight
It wants, and overflow valve is as one of the important mechanical structure for ensureing that hydraulic support safety and stability effectively works, the sensitivity of reaction
Indispensable role is played to the security reliability of hydraulic support in the work course with accuracy, therefore to overflow valve spirit
The research of sensitivity and stability has great importance.
Currently, in constant displacement pump flow restriction control system, constant displacement pump provides constant flow rate, when system pressure increases,
The demand of flow can be made to reduce, overflow valve can open overflow at this time, make extra traffic flow oil return box, ensure overflow valve import
The stability of pressure, the i.e. stability of pump discharge pressure, but for current existing technology, overflow valve reaches surely from unlatching
The time determined needed for state is long, and system pressure overshoot is bigger, influences the dynamic accuracy of entire hydraulic system.
Invention content
The purpose of the present invention is to provide a kind of overflow valve dynamic characteristics to improve device, to solve to carry in above-mentioned background technology
In the constant displacement pump flow restriction control system gone out, overflow valve is from opening long, the system pressure that reaches time needed for stable state
Overshoot is bigger, the problem of influencing the dynamic accuracy of entire hydraulic system.
To achieve the above object, the present invention provides the following technical solutions：A kind of overflow valve dynamic characteristic improvement device, including
The side of hydraulic cylinder, accumulator and fuel tank, the fuel tank is equipped with constant displacement pump, and the liquid outlet of the constant displacement pump passes through pipeline and liquid
The oil inlet of cylinder pressure connects, and the first check valve is equipped between the constant displacement pump and hydraulic cylinder, the constant displacement pump and first is unidirectionally
There are the second check valve, the outlet of second check valve to have spill valve by Pipe installing by Pipe installing between valve.
As a preferred technical solution of the present invention, the spill valve includes the first overflow valve, the second overflow valve
With third overflow valve, first overflow valve, the second overflow valve and third overflow valve are parallel with one another, first overflow valve,
The outlet of two overflow valves and third overflow valve is connected to by pipeline with fuel tank respectively.
As a preferred technical solution of the present invention, the inlet of the constant displacement pump is connected by pipeline and fuel tank internal
It is logical.
As a preferred technical solution of the present invention, being installed in series between second check valve and spill valve has
Accumulator.
As a preferred technical solution of the present invention, the piston drive of the hydraulic cylinder is connected with load.
Compared with prior art, the beneficial effects of the invention are as follows：A kind of overflow valve dynamic characteristic of the present invention improves device, the
The design of one overflow valve, the second overflow valve and third overflow valve parallel connection, by adjusting the pre compressed magnitude of respective spring, make three it is straight
The Opening pressure of the dynamic formula overflow valve formula that is stepped gradually increases, i.e., is stepped in the identical amount of opening of pressure
Formula is gradually reduced, in this way when spill valve by step signal (flow Q) in the case where being impacted suddenly, hydraulic oil pair
The impact of system will reduce, you can reach the overshoot of stable state required time and system pressure with reduction system；
Concatenated accumulator can play the role of buffering, be impacted suddenly by a step signal (flow Q) when spill valve
In the case of, it prevents fluid that the performance for influencing pump cannot be discharged at once, plays important cushioning effect, enhance the stability of system.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
In figure：1, it loads；2, piston；3, hydraulic cylinder；4, the first check valve；5, the second check valve；6, accumulator；7, first
Overflow valve；8, the second overflow valve；9, third overflow valve；10, fuel tank；11, constant displacement pump.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the present invention provides a kind of overflow valve dynamic characteristics to improve device, including hydraulic cylinder 3, accumulator 6
With fuel tank 10, the side of fuel tank 10 is equipped with constant displacement pump 11, the oil inlet that the liquid outlet of constant displacement pump 11 passes through pipeline and hydraulic cylinder 3
Connection, is equipped with the first check valve 4, passes through pipeline between constant displacement pump 11 and the first check valve 4 between constant displacement pump 11 and hydraulic cylinder 3
Second check valve 5 is installed, there is spill valve in the outlet of the second check valve 5 by Pipe installing.
Preferably, spill valve includes the first overflow valve 7, the second overflow valve 8 and third overflow valve 9, the first overflow valve
7, the second overflow valve 8 and third overflow valve 9 are parallel with one another, the outlet of the first overflow valve 7, the second overflow valve 8 and third overflow valve 9
It is connected to respectively with fuel tank 10 by pipeline, the first overflow valve 7 in parallel, the second overflow valve 8 and third overflow valve 9 can pass through
The pre compressed magnitude for adjusting respective spring makes the Opening pressure of the three direct-acting overflow valves formula that is stepped gradually increase, i.e., by
The amount of opening formula of being stepped is gradually reduced in the case of press strip part is identical.
Preferably, the inlet of constant displacement pump 11 is connected to by pipeline with 10 inside of fuel tank, and constant displacement pump 11 will be inside fuel tank 10
Hydraulic oil extraction.
Preferably, being installed in series between the second check valve 5 and spill valve has accumulator 6, and accumulator 6 plays important
Cushioning effect avoids spill valve in the case where being impacted suddenly by a step signal (flow Q), cannot beat at once
It opens, causes fluid that cannot be discharged at once, to influence the performance of pump.
Preferably, the piston 2 of hydraulic cylinder 3 is sequentially connected with load 1, and hydraulic cylinder 3 passes through movement of the piston 2 with dynamic load 1.
When specifically used, a kind of overflow valve dynamic characteristic of the present invention improves device, when hydraulic cylinder 3 works, constant displacement pump 11
By the hydraulic oil extraction inside fuel tank 10, hydraulic oil enters by the first check valve 4 in hydraulic cylinder 3, the oil in constant displacement pump 11
When pressing through big, extra oil can pass through the second check valve 5, when being buffered in accumulator 6, the first overflow valve 7, second along branch
Overflow valve 8 and third overflow valve 9 are opened, and when establishing the model of three overflow valve parallel connections, need to be adjusted regulator bolts, be made be pressurized
After the valve port of the first overflow valve of Direct Action Type 7 opens 1/3 in the case of condition is identical, the second overflow valve of Direct Action Type 8 is gradually opened,
When the amount of opening of the first overflow valve of Direct Action Type 7 reaches the 2/3 of entire valve port, the amount of opening of the second overflow valve of Direct Action Type 8 reaches whole
A valve port 1/3 when Direct Action Type third overflow valve 9 gradually open again, such spill valve will make extra hydraulic pressure
Oil reflux fuel tank ensures that hydraulic oil reduces the impact of system, you can reach the stable state required time with reduction system
With the overshoot of system pressure.
In the description of the present invention, it is to be understood that, term " coaxial ", " bottom ", " one end ", " top ", " middle part ",
The orientation or positional relationship of the instructions such as " other end ", "upper", " side ", " top ", "inner", " front ", " center ", " both ends " is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as pair
The limitation of the present invention.
In addition, term " first ", " second ", " third ", " the 4th " are used for description purposes only, and should not be understood as instruction or
It implies relative importance or implicitly indicates the quantity of indicated technical characteristic, define " first ", " second ", " the as a result,
Three ", the feature of " the 4th " can explicitly or implicitly include at least one of the features.
In the present invention unless specifically defined or limited otherwise, term " installation ", " setting ", " connection ", " fixation ",
Terms such as " being screwed on " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be with
It is mechanical connection, can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary two
The interaction relationship of connection or two elements inside a element, unless otherwise restricted clearly, for the common of this field
For technical staff, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of overflow valve dynamic characteristic improves device, including hydraulic cylinder (3), accumulator (6) and fuel tank (10), feature exists
In the side of the fuel tank (10) is equipped with constant displacement pump (11), and the liquid outlet of the constant displacement pump (11) passes through pipeline and hydraulic cylinder
(3) oil inlet connection, the first check valve (4), the constant displacement pump are equipped between the constant displacement pump (11) and hydraulic cylinder (3)
(11) there are the second check valve (5), the outlet of second check valve (5) logical by Pipe installing between the first check valve (4)
Piping is equipped with spill valve.
2. a kind of overflow valve dynamic characteristic according to claim 1 improves device, it is characterised in that：The spill valve
Including the first overflow valve (7), the second overflow valve (8) and third overflow valve (9), first overflow valve (7), the second overflow valve
(8) and third overflow valve (9) is parallel with one another, and first overflow valve (7), the second overflow valve (8) and third overflow valve (9) go out
Mouth is connected to by pipeline with fuel tank (10) respectively.
3. a kind of overflow valve dynamic characteristic according to claim 1 improves device, it is characterised in that：The constant displacement pump (11)
Inlet by being connected to inside pipeline and fuel tank (10).
4. a kind of overflow valve dynamic characteristic according to claim 1 improves device, it is characterised in that：Second check valve
(5) being installed in series between spill valve has accumulator (6).
5. a kind of overflow valve dynamic characteristic according to claim 1 improves device, it is characterised in that：The hydraulic cylinder (3)
Piston (2) be sequentially connected with load (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810876223.2A CN108644160A (en) | 2018-08-03 | 2018-08-03 | A kind of overflow valve dynamic characteristic improvement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810876223.2A CN108644160A (en) | 2018-08-03 | 2018-08-03 | A kind of overflow valve dynamic characteristic improvement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108644160A true CN108644160A (en) | 2018-10-12 |
Family
ID=63760735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810876223.2A Pending CN108644160A (en) | 2018-08-03 | 2018-08-03 | A kind of overflow valve dynamic characteristic improvement device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108644160A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709779A (en) * | 2020-12-28 | 2021-04-27 | 太原重工股份有限公司 | Hydraulic safety buffer device for continuous pipe rolling unit |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1650771A1 (en) * | 1968-03-13 | 1970-11-12 | Linde Ag | Drive unit with a common energy source for several consumers |
| CN201521512U (en) * | 2009-10-19 | 2010-07-07 | 路文忠 | Digital electro-hydraulic servo driving device adopting servo motor for direct drive |
| CN202897848U (en) * | 2012-09-07 | 2013-04-24 | 上海三一科技有限公司 | Mast pulling servo control hydraulic system and crane |
| CN203230677U (en) * | 2013-03-19 | 2013-10-09 | 浙江海洋学院 | Automatic oil supplementing system of closed hydraulic cargo winch |
| CN103482372A (en) * | 2013-09-24 | 2014-01-01 | 长春发电设备总厂 | Hydraulic semi-luffing tripper car of head-sinking-preventing bucket-wheel stacker-reclaimer |
| CN104595284A (en) * | 2015-01-04 | 2015-05-06 | 宁波锦球机械有限公司 | Unloading valve of emulsified liquid system |
| CN105805097A (en) * | 2016-05-06 | 2016-07-27 | 华侨大学 | Recycling and reusing system of overflow losses of overflow valves |
| CN106870482A (en) * | 2017-03-14 | 2017-06-20 | 温州大学 | The vibration hydraulic system of cement pavement resonance rock crushing plant |
-
2018
- 2018-08-03 CN CN201810876223.2A patent/CN108644160A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1650771A1 (en) * | 1968-03-13 | 1970-11-12 | Linde Ag | Drive unit with a common energy source for several consumers |
| CN201521512U (en) * | 2009-10-19 | 2010-07-07 | 路文忠 | Digital electro-hydraulic servo driving device adopting servo motor for direct drive |
| CN202897848U (en) * | 2012-09-07 | 2013-04-24 | 上海三一科技有限公司 | Mast pulling servo control hydraulic system and crane |
| CN203230677U (en) * | 2013-03-19 | 2013-10-09 | 浙江海洋学院 | Automatic oil supplementing system of closed hydraulic cargo winch |
| CN103482372A (en) * | 2013-09-24 | 2014-01-01 | 长春发电设备总厂 | Hydraulic semi-luffing tripper car of head-sinking-preventing bucket-wheel stacker-reclaimer |
| CN104595284A (en) * | 2015-01-04 | 2015-05-06 | 宁波锦球机械有限公司 | Unloading valve of emulsified liquid system |
| CN105805097A (en) * | 2016-05-06 | 2016-07-27 | 华侨大学 | Recycling and reusing system of overflow losses of overflow valves |
| CN106870482A (en) * | 2017-03-14 | 2017-06-20 | 温州大学 | The vibration hydraulic system of cement pavement resonance rock crushing plant |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709779A (en) * | 2020-12-28 | 2021-04-27 | 太原重工股份有限公司 | Hydraulic safety buffer device for continuous pipe rolling unit |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181012 |
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| RJ01 | Rejection of invention patent application after publication |