CN104265703B - A kind of energy-conservation second voltage regulation loop of hydraulic system - Google Patents
A kind of energy-conservation second voltage regulation loop of hydraulic system Download PDFInfo
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- CN104265703B CN104265703B CN201410532046.8A CN201410532046A CN104265703B CN 104265703 B CN104265703 B CN 104265703B CN 201410532046 A CN201410532046 A CN 201410532046A CN 104265703 B CN104265703 B CN 104265703B
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- valve
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- accumulator
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
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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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
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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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention provides the energy-conservation second voltage regulation loop of a kind of hydraulic system, including the oil feed pump being connected with fuel tank, the oil outlet end of described oil feed pump connects three-position four-way valve, two oil-outs of described three-position four-way valve are all connected with the oil inlet end from return one-way cylinder by accumulator, electromagnetic valve, and the described oil outlet end from return one-way cylinder is connected with described fuel tank；Described accumulator side is in series with pressure switch；Two oil-outs of described three-position four-way valve have been also respectively connected with the second overflow valve, the 3rd overflow valve, and being connected between described oil feed pump and three-position four-way valve has the first overflow valve.Oil feed pump is in discontinuous operation state in the course of the work, thus has reached energy-conservation purpose, the problem that simultaneously it also avoid system high oil temperature, and the equipment that protects runs safety.
Description
Technical field
The present invention relates to hydraulic system, be specifically related to the energy-conservation second voltage regulation loop of a kind of hydraulic system.
Background technology
In order to prevent hydraulic system from transshipping; make hydraulic system pressure in whole or in part constant or protect security of system less than certain numerical value; set up or limit the maximum working pressure of hydraulic system by pressure-control circuit, or make executive component be capable of multiple different pressure alteration in the different phase of work process.Having single-stage pressure-control circuit and multi-stage pressure regulating loop, applying wider fundamental circuit the most in the industrial production is second voltage regulation loop.Although second voltage regulation loop uses in the case of being applicable to two kinds of fixation pressure checkers, but there is a drawback in this loop, that is exactly that oil feed pump is always in continuous firing during two kinds of fixation pressures respectively pressurize, and the continuous firing of oil pump not only wastes the energy but also increases system oil temperature.
Summary of the invention
The present invention is to solve above-mentioned technical problem, it is provided that the energy-conservation second voltage regulation loop of a kind of hydraulic system, make oil feed pump realize interval work, thus reach to save the energy and reduce the purpose of oil circuit pressure and oil temperature.
The technical scheme is that the energy-conservation second voltage regulation loop of a kind of hydraulic system, including the oil feed pump being connected with fuel tank, the oil outlet end of described oil feed pump connects three-position four-way valve, two oil-outs of described three-position four-way valve are all connected with the oil inlet end from return one-way cylinder by accumulator, electromagnetic valve, and the described oil outlet end from return one-way cylinder is connected with described fuel tank；Described accumulator side is in series with pressure switch；Two oil-outs of described three-position four-way valve have been also respectively connected with the second overflow valve, the 3rd overflow valve, and being connected between described oil feed pump and three-position four-way valve has the first overflow valve.
Further, the overflow operating pressure of described first overflow valve, the second overflow valve and the 3rd overflow valve is respectively P6A, P6B and P6C, and between them, pressure size is P6A ＞ P6C ＞ P6B.
Further, described fuel tank and oil feed pump connect has coarse filter, the port of export of described first overflow valve, the second overflow valve and the 3rd overflow valve to be all connected with fuel tank by fine filter.
Further, described electromagnetic valve is Solenoid ball valve.
Further, an oil-out of described three-position four-way valve passes sequentially through non-return valve, the first accumulator, the first Solenoid ball valve are connected with the oil inlet end from return one-way cylinder；Another oil-out of three-position four-way valve passes sequentially through the 3rd Solenoid ball valve, the second accumulator, the second Solenoid ball valve are connected with the oil inlet end from return one-way cylinder.
More excellent, described first overflow valve is serially connected with the first hydralic pressure gauge；Described first accumulator has been sequentially connected in series the first pressure switch, the 3rd hydralic pressure gauge；Second accumulator has been sequentially connected in series the second pressure switch, the second hydralic pressure gauge.
In the present invention, the first pressure switch is provided with low pressure limit value and the upper pressure limit value of the slightly above the 3rd overflow valve of slightly below the 3rd overflow valve, when the pressure in the first accumulator is less than the low pressure limit value set by the first pressure switch, then open oil feed pump, supplement energy to carrying out fuel feeding in the first accumulator.When reaching the upper pressure limit value set by the first pressure switch, the spool of three-position four-way valve will automatically return to middle position, then oil feed pump stops continuing to fill energy to the first accumulator and shutting down.
When the left end of three-position four-way valve is energized, then opening the 3rd Solenoid ball valve and the second Solenoid ball valve, hydraulic oil enters pushing piston-rod in return one-way cylinder by them.Second accumulator stores the low operating pressure of the current hydraulic system determined by the regulation pressure of the second overflow valve, after the second accumulator has stored ability, then close the 3rd Solenoid ball valve, the second Solenoid ball valve, and make the right-hand member of three-position four-way valve be energized, open the first Solenoid ball valve, hydraulic oil run past non-return valve, the first Solenoid ball valve and enter pushing piston-rod in return one-way cylinder.Now the pressure of hydraulic system will become the high workload pressure determined by the regulation pressure of the 3rd overflow valve, and after having stored, the core valve of three-position four-way valve transforms to centre position, and oil feed pump is shut down stand-by.
Owing to now the pressure in return one-way cylinder is high workload pressure, the first accumulator by for provide from return one-way cylinder continue, stable oil pressure.When to transform to low operating pressure gear from the pressure of return one-way cylinder, then close the first Solenoid ball valve, open the 3rd Solenoid ball valve, the second Solenoid ball valve, section hydraulic oil will be had in return one-way cylinder and return in fuel tank by the second overflow valve, after the pressure in return one-way cylinder reduces, second pressure switch will cut out the 3rd Solenoid ball valve, then the second accumulator is by for providing lasting a, oil pressure for low temperature from return one-way cylinder.
In the present invention, the overflow operating pressure of the first overflow valve, the second overflow valve and the 3rd overflow valve is respectively P6A, P6B and P6C, between them, pressure size is P6A ＞ P6C ＞ P6B, and in two-stage loop, the hydraulic oil of current hydraulic system is stored respectively with accumulator, realized by the pressure differential of hydraulic oil automatically providing hydraulic oil to from return one-way cylinder, drive and work from return one-way cylinder, and oil feed pump carries out replenisher force feed with only needing discontinuous to accumulator, without the fuel feeding that works continuously.So the second voltage regulation loop oil feed pump in the course of the work of the present invention is in discontinuous operation state, thus having reached energy-conservation purpose, the problem that simultaneously it also avoid system high oil temperature, the equipment that protects runs safety.
All the time discontinuous operation state it is in additionally, due to oil feed pump, so during second voltage regulation loop works, reduce operating noise, make whole system will have relatively low noisy environment, so second voltage regulation loop structure is particularly suited for the forward loading system of engineering truck case bridge testing stand, can preferably detect the noise situations of testpieces itself in case bridge process of the test, it is not affected greatly by the hydraulic system of testing stand simultaneously.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings the present invention is described in further detail:
Fig. 1 is second voltage regulation circuit diagram of the present invention.
In figure: 1-fuel tank, 2-coarse filter, 3-oil feed pump, 4-fine filter, 5-three-position four-way valve, 6A-the first overflow valve, 6B-the second overflow valve, 6C-the 3rd overflow valve, 7A-the first hydralic pressure gauge, 7B-the second hydralic pressure gauge, 7C-the 3rd hydralic pressure gauge, 8A-the first pressure switch, 8B-the second pressure switch, 9A-the first accumulator, 9B-the second accumulator, 10A-the first Solenoid ball valve, 10B-the second Solenoid ball valve, 10C-the 3rd Solenoid ball valve, 11-is from return one-way cylinder, 12-non-return valve.
Detailed description of the invention
As shown in Figure 1, a kind of energy-conservation second voltage regulation loop of hydraulic system, including the oil feed pump 3 being connected with fuel tank 1, the oil outlet end of described oil feed pump 3 connects three-position four-way valve 5, and an oil-out of described three-position four-way valve 5 passes sequentially through non-return valve the 12, first accumulator 9A, the first Solenoid ball valve 10A is connected with the oil inlet end from return one-way cylinder 11；Another oil-out of three-position four-way valve 5 passes sequentially through the 3rd Solenoid ball valve 10C, the second accumulator 9B, the second Solenoid ball valve 10B are connected with the oil inlet end from return one-way cylinder 11, is connected with fuel tank 1 from the oil outlet end of return one-way cylinder 11.Two oil-outs of three-position four-way valve 5 have been also respectively connected with the second overflow valve 6B, the 3rd overflow valve 6C, be connected and have the first overflow valve 6A between oil feed pump 3 with three-position four-way valve 5；First overflow valve 6A is serially connected with the first hydralic pressure gauge 7A；Described first accumulator 9A has been sequentially connected in series the first pressure switch 8A, the 3rd hydralic pressure gauge 7C；Second accumulator 9B has been sequentially connected in series the second pressure switch 8B, the second hydralic pressure gauge 7B.Fuel tank 1 and oil feed pump 3 connect has coarse filter 2, the first overflow valve 6A, the port of export of the second overflow valve 6B and the 3rd overflow valve 6C to be all connected with fuel tank 1 by fine filter 4.
Further, described first overflow valve 6A, the overflow operating pressure of the second overflow valve 6B and the 3rd overflow valve 6C are respectively P6A, P6B and P6C, and between them, pressure size is P6A ＞ P6C ＞ P6B.Wherein P6A is the safe pressure of hydraulic system, and P6C is one grade of big operating pressure of hydraulic system, and P6B is two grades of low operating pressures of hydraulic system.
Hydraulic oil is extracted out from fuel tank 1 by oil feed pump 3 by coarse filter 2, and when the spool of three-position four-way valve 5 is in an intermediate position, the oil that oil feed pump 3 is got can be by the first overflow valve 6A again in fine filter 4 returns to fuel tank 1.Now oil feed pump 3 is in sky loaded-up condition, and wherein the first hydralic pressure gauge 7A is shown that hydraulic system pressure, and the first overflow valve 6A plays the effect of system pressure protection.
When the left end of three-position four-way valve 5 is energized, open the 3rd Solenoid ball valve 10C and the second Solenoid ball valve 10B simultaneously, hydraulic oil runs past the 3rd Solenoid ball valve 10C, the second Solenoid ball valve 10B and enters in return one-way cylinder 11, simultaneously by extrapolated for the piston rod of oil cylinder.Now the pressure of hydraulic system is then to be determined by the regulation pressure of the second overflow valve 6B, and this pressure is P6B.And the first hydralic pressure gauge 7A, the second hydralic pressure gauge 7B will show the pressure P6B of current hydraulic system simultaneously, two force value are identical.It is simultaneously provided with the pressure P6B storing current hydraulic system in the second accumulator 9B in the middle of this oil circuit, after the second accumulator 9B has stored ability, simultaneously closes off the 3rd Solenoid ball valve 10C, the second Solenoid ball valve 10B.
Then being energized by the right-hand member of three-position four-way valve 5, and open the first Solenoid ball valve 10A, hydraulic oil runs past non-return valve the 12, first Solenoid ball valve 10A and enters in return one-way cylinder 11, simultaneously by extrapolated for the piston rod of oil cylinder.The pressure of the most whole hydraulic system is controlled becoming by the regulation of the 3rd overflow valve 6C, and pressure store, with P6C, is the energy of P6C in the first accumulator 9A by pressure, and the pressure in return one-way cylinder 1 also will be increased to P6C.After the ability in the first accumulator 9A has stored, the core valve of three-position four-way valve 5 is transformed to centre position, and oil feed pump 3 is shut down stand-by.
Due to the P6C that the pressure in return one-way cylinder 11 is one grade of high workload pressure, the first accumulator 9A by for provide from return one-way cylinder 11 continue, stable oil pressure.When to transform to low operating pressure gear from the pressure of return one-way cylinder 11, then close the first Solenoid ball valve 10A, make the first accumulator 9A to act on from return one-way cylinder 11 again.Open the 3rd Solenoid ball valve 10C, the second Solenoid ball valve 10B the most respectively, due to now high than the pressure P6B that the second overflow valve 6B is arranged from the oil pressure P6C of return one-way cylinder 11, returned in fuel tank 1 so section hydraulic oil will be had in return one-way cylinder 11 by the second overflow valve 6B.Pressure set by pressure that during whole, second accumulator 9B is kept and the second overflow valve 6B is identical is all P6B.After the pressure in return one-way cylinder 11 is down to P6B, 3rd Solenoid ball valve 10C will be controlled by the second pressure switch 8B, 3rd Solenoid ball valve 10C is closed rapidly, then the second accumulator 9B is by for providing lasting a, pressure for temperature from return one-way cylinder 11, and pressure now is low operating pressure P6B from return one-way cylinder 11.
Due to from each operating pressure of return one-way cylinder 11 all by P6C when P6B changes, all can flow back in fuel tank 1 from the first accumulator 9A by some hydraulic oil, so often the first accumulator 9A being accomplished by carrying out energy supplement after pressure alteration several times.First pressure switch 8A is arranged the pressure P6C lower limit of slightly below the 3rd overflow valve and the higher limit of the pressure P6C of the slightly above the 3rd overflow valve, when the pressure in the first accumulator 9A is less than the low pressure limit value set by the first pressure switch 8A, then open oil feed pump 3, and make three-position four-way valve 5 be maintained at right-hand member energising.So oil feed pump 3 will carry out energy supplement in giving the first accumulator 9A.When reaching the upper pressure limit value set by the first pressure switch 8A after energy supplement completes, the spool of three-position four-way valve 5 will automatically return to middle position, then oil feed pump 3 stops continuing to fill energy and shut down in the first accumulator 9A.The first accumulator 9A after supplementary energy can proceed the conversion of the most high and low operating pressure.Owing to whole loop oil feed pump 3 in the course of the work is in discontinuous operation state, thus reach energy-conservation purpose, the problem that simultaneously it also avoid system high oil temperature.
Above example is not limited only to protection scope of the present invention, all basic thoughts based on the present invention and modify or change broadly fall into protection scope of the present invention.
Claims (6)
1. the energy-conservation second voltage regulation loop of a hydraulic system, including the oil feed pump (3) being connected with fuel tank (1), it is characterized in that: the oil outlet end of described oil feed pump (3) connects three-position four-way valve (5), two oil-outs of described three-position four-way valve (5) are all connected with the oil inlet end from return one-way cylinder (11) by accumulator, electromagnetic valve, and the described oil outlet end from return one-way cylinder (11) is connected with described fuel tank (1)；Described accumulator side is in series with pressure switch；Two oil-outs of described three-position four-way valve (5) have been also respectively connected with the second overflow valve (6B), the 3rd overflow valve (6C), and being connected between described oil feed pump (3) with three-position four-way valve (5) has the first overflow valve (6A).
Energy-conservation second voltage regulation loop the most according to claim 1, it is characterized in that: the overflow operating pressure of described first overflow valve (6A), the second overflow valve (6B) and the 3rd overflow valve (6C) is respectively P6A, P6B and P6C, between them, pressure size is P6A ＞ P6C ＞ P6B.
Energy-conservation second voltage regulation loop the most according to claim 1, it is characterized in that: described fuel tank (1) and oil feed pump (3) connect has coarse filter (2), the port of export of described first overflow valve (6A), the second overflow valve (6B) and the 3rd overflow valve (6C) to be all connected with fuel tank (1) by fine filter (4).
Energy-conservation second voltage regulation loop the most according to claim 1, it is characterised in that: described electromagnetic valve is Solenoid ball valve.
Energy-conservation second voltage regulation loop the most according to claim 4, it is characterised in that: an oil-out of described three-position four-way valve (5) passes sequentially through non-return valve (12), the first accumulator (9A), the first Solenoid ball valve (10A) are connected with the oil inlet end from return one-way cylinder (11)；Another oil-out of three-position four-way valve (5) passes sequentially through the 3rd Solenoid ball valve (10C), the second accumulator (9B), the second Solenoid ball valve (10B) are connected with the oil inlet end from return one-way cylinder (11).
Energy-conservation second voltage regulation loop the most according to claim 5, it is characterised in that: described first overflow valve (6A) is serially connected with the first hydralic pressure gauge (7A)；Described first accumulator (9A) has been sequentially connected in series the first pressure switch (8A), the 3rd hydralic pressure gauge (7C)；Second accumulator (9B) has been sequentially connected in series the second pressure switch (8B), the second hydralic pressure gauge (7B).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410532046.8A CN104265703B (en) | 2014-10-11 | 2014-10-11 | A kind of energy-conservation second voltage regulation loop of hydraulic system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410532046.8A CN104265703B (en) | 2014-10-11 | 2014-10-11 | A kind of energy-conservation second voltage regulation loop of hydraulic system |
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| CN104265703A CN104265703A (en) | 2015-01-07 |
| CN104265703B true CN104265703B (en) | 2016-08-03 |
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| CN201410532046.8A Active CN104265703B (en) | 2014-10-11 | 2014-10-11 | A kind of energy-conservation second voltage regulation loop of hydraulic system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102015116763A1 (en) * | 2015-10-02 | 2017-04-06 | Linde Hydraulics Gmbh & Co. Kg | Hydraulic constant pressure system |
Citations (5)
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|---|---|---|---|---|
| CN201671899U (en) * | 2010-05-19 | 2010-12-15 | 西安邮电学院 | Hydraulic overflow buffer circuit for mechanical arm |
| CN101979869A (en) * | 2010-11-03 | 2011-02-23 | 上海电气液压气动有限公司 | Yaw brake device of wind power generation hydraulic system |
| CN201851270U (en) * | 2010-11-25 | 2011-06-01 | 华锐风电科技(江苏)有限公司 | Hydraulic driving system for braking of wind power generating unit |
| CN202544015U (en) * | 2012-05-04 | 2012-11-21 | 山东理工大学 | Hydraulic system of loader |
| CN204113776U (en) * | 2014-10-11 | 2015-01-21 | 安徽合力股份有限公司 | A kind of energy-conservation second voltage regulation loop of hydraulic system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007247727A (en) * | 2006-03-15 | 2007-09-27 | Kyoritsu Kogyo Kk | Construction and civil engineering machine capable of being powered up by pressure accumulator or pressure booster |
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- 2014-10-11 CN CN201410532046.8A patent/CN104265703B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201671899U (en) * | 2010-05-19 | 2010-12-15 | 西安邮电学院 | Hydraulic overflow buffer circuit for mechanical arm |
| CN101979869A (en) * | 2010-11-03 | 2011-02-23 | 上海电气液压气动有限公司 | Yaw brake device of wind power generation hydraulic system |
| CN201851270U (en) * | 2010-11-25 | 2011-06-01 | 华锐风电科技(江苏)有限公司 | Hydraulic driving system for braking of wind power generating unit |
| CN202544015U (en) * | 2012-05-04 | 2012-11-21 | 山东理工大学 | Hydraulic system of loader |
| CN204113776U (en) * | 2014-10-11 | 2015-01-21 | 安徽合力股份有限公司 | A kind of energy-conservation second voltage regulation loop of hydraulic system |
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