CN204113776U - 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
- Publication number
- CN204113776U CN204113776U CN201420584726.XU CN201420584726U CN204113776U CN 204113776 U CN204113776 U CN 204113776U CN 201420584726 U CN201420584726 U CN 201420584726U CN 204113776 U CN204113776 U CN 204113776U
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- valve
- oil
- pressure
- relief valve
- accumulator
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Abstract
The utility model provides a kind of energy-conservation second voltage regulation loop of hydraulic system, comprise the oil feed pump be connected with fuel tank, the oil outlet end of described oil feed pump is connected with three-position four-way valve, two oil outlets of described three-position four-way valve are all connected with the oil inlet end from return one-way cylinder by accumulator, solenoid 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 relay; Two oil outlets of described three-position four-way valve are also connected to the second relief valve, the 3rd relief valve, are connected with the first relief valve between described oil feed pump and three-position four-way valve.Oil feed pump is in discontinuous operation state in the course of the work, thus reach energy-conservation object, it also avoid the problem of system high oil temperature simultaneously, protects equipment security of operation.
Description
Technical field
The utility model relates to hydraulic system, is specifically related to a kind of energy-conservation second voltage regulation loop of hydraulic system.
Background technique
Transship to prevent hydraulic system; make hydraulic system constant pressure in whole or in part or be no more than certain numerical value and protective system safety; set up or limit the Maximum operating pressure of hydraulic system by pressure-control circuit, or enable executive component realize multiple different pressure alteration in the different phase of working procedure.Have single-stage pressure-control circuit and multi-stage pressure regulating loop, applying wider fundamental circuit at present is in the industrial production second voltage regulation loop.Although second voltage regulation loop uses when 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 in the process of two kinds of fixation pressures difference pressurize, and the continuous firing of oil pump not only wastes the energy but also increases system oil temperature.
Model utility content
The utility model, in order to solve the problems of the technologies described above, provide a kind of energy-conservation second voltage regulation loop of hydraulic system, makes oil feed pump realize interval work, thus reaches the object of saving energy reduction oil circuit pressure and oil temperature.
The technical solution of the utility model is: a kind of energy-conservation second voltage regulation loop of hydraulic system, comprise the oil feed pump be connected with fuel tank, the oil outlet end of described oil feed pump is connected with three-position four-way valve, two oil outlets of described three-position four-way valve are all connected with the oil inlet end from return one-way cylinder by accumulator, solenoid 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 relay; Two oil outlets of described three-position four-way valve are also connected to the second relief valve, the 3rd relief valve, are connected with the first relief valve between described oil feed pump and three-position four-way valve.
Further, the overflow working pressure of described first relief valve, the second relief valve and the 3rd relief valve is respectively P6A, P6B and P6C, and between them, pressure size is P6A > P6C > P6B.
Further, described fuel tank and oil feed pump are connected with strainer, and described first relief valve, the second relief valve are all connected with fuel tank by secondary filter with the outlet end of the 3rd relief valve.
Further, described solenoid valve is Solenoid ball valve.
Further, an oil outlet of described three-position four-way valve is connected with the oil inlet end from return one-way cylinder by non-return valve, the first accumulator, the first Solenoid ball valve successively; Another oil outlet of three-position four-way valve is connected with the oil inlet end from return one-way cylinder by the 3rd Solenoid ball valve, the second accumulator, the second Solenoid ball valve successively.
More excellent, described first relief valve is serially connected with the first hydralic pressure gauge; Described first accumulator is in series with the first pressure relay, the 3rd hydralic pressure gauge successively; Second accumulator is in series with the second pressure relay, the second hydralic pressure gauge successively.
In the utility model, the first pressure relay is provided with one a little less than the low pressure limit value of the 3rd relief valve and the upper pressure limit value a little more than the 3rd relief valve, when the pressure in the first accumulator is lower than low pressure limit value set by the first pressure relay, then open oil feed pump, carry out fuel feeding makeup energy in the first accumulator.When reaching the upper pressure limit value set by the first pressure relay, the spool of three-position four-way valve will automatically return to meta, then oil feed pump stops continuing to fill energy to the first accumulator and shutting down.
When the left end energising of three-position four-way valve, then open the 3rd Solenoid ball valve and the second Solenoid ball valve, hydraulic oil enters pushing piston-rod in return one-way cylinder by them.The low working pressure of the current hydraulic system determined by the adjustment pressure of the second relief valve is stored in second accumulator, after the second accumulator has stored ability, then close the 3rd Solenoid ball valve, the second Solenoid ball valve, and the right-hand member of three-position four-way valve is energized, opens the first Solenoid ball valve, hydraulic oil will through 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 decided by the adjustment pressure of the 3rd relief valve, and after having stored, the core valve of three-position four-way valve transforms to neutral position, and oil feed pump is shut down stand-by.
Because the pressure now in return one-way cylinder is high workload pressure, the first accumulator is by for providing lasting, stable oil pressure from return one-way cylinder.When low working pressure gear will be transformed to 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, to have section hydraulic oil in return one-way cylinder turns back in fuel tank by the second relief valve, after the pressure in return one-way cylinder reduces, second pressure relay by closedown the 3rd Solenoid ball valve, then the second accumulator by for providing one to continue from return one-way cylinder, the oil pressure of low temperature.
First relief valve in the utility model, the overflow working pressure of the second relief valve and the 3rd relief 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 difference 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 to accumulator with only needing discontinuous, and do not need continuous operation fuel feeding.So second voltage regulation loop of the present utility model in the course of the work oil feed pump be in discontinuous operation state, thus reach energy-conservation object, it also avoid the problem of system high oil temperature simultaneously, protect equipment security of operation.
In addition because oil feed pump is in discontinuous operation state all the time, so in second voltage regulation loop works process, reduce operating noise, whole system is made to have lower noisy environment, so second voltage regulation loop structure is particularly useful for the forward loading system of engineering vehicle case bridge test stand, can detect preferably the noise situations of testpieces itself in case bridge process of the test, the hydraulic system of test stand does not affect greatly it simultaneously.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Fig. 1 is the utility model second voltage regulation circuit diagram.
In figure: 1-fuel tank, 2-strainer, 3-oil feed pump, 4-secondary filter, 5-three-position four-way valve, 6A-first relief valve, 6B-second relief valve, 6C-the 3rd relief valve, 7A-first hydralic pressure gauge, 7B-second hydralic pressure gauge, 7C-the 3rd hydralic pressure gauge, 8A-first pressure relay, 8B-second pressure relay, 9A-first accumulator, 9B-second accumulator, 10A-first Solenoid ball valve, 10B-second Solenoid ball valve, 10C-the 3rd Solenoid ball valve, 11-from return one-way cylinder, 12-non-return valve.
Embodiment
As shown in Figure 1, a kind of energy-conservation second voltage regulation loop of hydraulic system, comprise the oil feed pump 3 be connected with fuel tank 1, the oil outlet end of described oil feed pump 3 is connected with three-position four-way valve 5, and an oil outlet of described three-position four-way valve 5 is connected with the oil inlet end from return one-way cylinder 11 by non-return valve 12, first accumulator 9A, the first Solenoid ball valve 10A successively; Another oil outlet of three-position four-way valve 5 is connected with the oil inlet end from return one-way cylinder 11 by the 3rd Solenoid ball valve 10C, the second accumulator 9B, the second Solenoid ball valve 10B successively, is connected with fuel tank 1 from the oil outlet end of return one-way cylinder 11.Two oil outlets of three-position four-way valve 5 are also connected to the second relief valve 6B, the 3rd relief valve 6C, are connected with the first relief valve 6A between oil feed pump 3 and three-position four-way valve 5; First relief valve 6A is serially connected with the first hydralic pressure gauge 7A; Described first accumulator 9A is in series with the first pressure relay 8A, the 3rd hydralic pressure gauge 7C successively; Second accumulator 9B is in series with the second pressure relay 8B, the second hydralic pressure gauge 7B successively.Fuel tank 1 and oil feed pump 3 are connected with strainer 2, and the first relief valve 6A, the second relief valve 6B are all connected with fuel tank 1 by secondary filter 4 with the outlet end of the 3rd relief valve 6C.
Further, the overflow working pressure of described first relief valve 6A, the second relief valve 6B and the 3rd relief valve 6C is respectively P6A, P6B and P6C, and between them, pressure size is P6A > P6C > P6B.Wherein P6A is the safety pressure of hydraulic system, and P6C is one grade of large working pressure of hydraulic system, and P6B is the low working pressure of second gear of hydraulic system.
Hydraulic oil is extracted out by strainer 2 by oil feed pump 3 from fuel tank 1, and when the spool of three-position four-way valve 5 mediates, the oil that oil feed pump 3 is got can be got back in fuel tank 1 through secondary filter 4 by the first relief valve 6A again.Now oil feed pump 3 is in sky loaded-up condition, and what wherein the first hydralic pressure gauge 7A showed is hydraulic system pressure, and the first relief valve 6A plays the effect of system pressure protection.
When the left end energising of three-position four-way valve 5, open the 3rd Solenoid ball valve 10C and the second Solenoid ball valve 10B simultaneously, hydraulic oil will enter in return one-way cylinder 11, simultaneously by extrapolated for the piston rod of oil cylinder through the 3rd Solenoid ball valve 10C, the second Solenoid ball valve 10B.Now the pressure of hydraulic system is then determined by the adjustment pressure of the second relief valve 6B, and this pressure is P6B.And the first hydralic pressure gauge 7A, the second hydralic pressure gauge 7B will show the pressure P 6B of current hydraulic system simultaneously, two force value are identical.Be provided with the pressure P 6B storing current hydraulic system in the second accumulator 9B in the middle of this oil circuit simultaneously, after the second accumulator 9B has stored ability, close the 3rd Solenoid ball valve 10C, the second Solenoid ball valve 10B simultaneously.
Then be energized by the right-hand member of three-position four-way valve 5, and open the first Solenoid ball valve 10A, hydraulic oil will enter in return one-way cylinder 11, simultaneously by extrapolated for the piston rod of oil cylinder through non-return valve 12, first Solenoid ball valve 10A.Now the adjustment become by the 3rd relief valve 6C controls by the pressure of whole hydraulic system, and pressure store, with P6C, is the energy of P6C in the first accumulator 9A, also will increases to P6C from the pressure of return one-way cylinder 1 li by pressure.After the ability in the first accumulator 9A has stored, the core valve of three-position four-way valve 5 is transformed to neutral position, and oil feed pump 3 has been 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 is by for providing lasting, stable oil pressure from return one-way cylinder 11.When low working pressure gear will be transformed to from the pressure of return one-way cylinder 11, then close the first Solenoid ball valve 10A, the first accumulator 9A cannot be acted on from return one-way cylinder 11 again.And then open the 3rd Solenoid ball valve 10C, the second Solenoid ball valve 10B respectively, the pressure P 6B arranged than the second relief valve 6B due to the oil pressure P6C now from return one-way cylinder 11 is high, is turned back in fuel tank 1 so will have section hydraulic oil in return one-way cylinder 11 by the second relief valve 6B.The pressure that in whole process, the second accumulator 9B keeps is identical with the pressure set by the second relief valve 6B is all P6B.After the Pressure Drop in return one-way cylinder 11 to P6B, second pressure relay 8B will control the 3rd Solenoid ball valve 10C, 3rd Solenoid ball valve 10C is closed rapidly, then the second accumulator 9B by for providing one to continue from return one-way cylinder 11, the pressure of temperature, pressure is now the low working pressure P6B from return one-way cylinder 11.
Due to when each working pressure of return one-way cylinder 11 is all changed to P6B by P6C, some hydraulic oil of capital flows back in fuel tank 1 from the first accumulator 9A, so often just need to carry out energy supplement in the first accumulator 9A after pressure alteration several times.A CLV ceiling limit value a little less than the pressure P 6C lower limit of the 3rd relief valve and the pressure P 6C a little more than the 3rd relief valve is arranged to the first pressure relay 8A, when the pressure in the first accumulator 9A is lower than low pressure limit value set by the first pressure relay 8A, then open oil feed pump 3, and make three-position four-way valve 5 remain on right-hand member energising.Such oil feed pump 3 will be given in the first accumulator 9A and carry out energy supplement.When reaching the upper pressure limit value set by the first pressure relay 8A after energy supplement completes, the spool of three-position four-way valve 5 will automatically return to meta, then oil feed pump 3 stops continuing fill energy and shut down in the first accumulator 9A.The first accumulator 9A after makeup energy can proceed repeatedly the conversion of high and low working pressure.Due to whole loop in the course of the work oil feed pump 3 be in discontinuous operation state, thus reach energy-conservation object, it also avoid the problem of system high oil temperature simultaneously.
Above embodiment is not limited only to protection domain of the present utility model, all modify based on basic thought of the present utility model or change all belong to protection domain of the present utility model.
Claims (6)
1. the energy-conservation second voltage regulation loop of a hydraulic system, comprise the oil feed pump (3) be connected with fuel tank (1), it is characterized in that: the oil outlet end of described oil feed pump (3) is connected with three-position four-way valve (5), two oil outlets of described three-position four-way valve (5) are all connected with the oil inlet end from return one-way cylinder (11) by accumulator, solenoid 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 relay; Two oil outlets of described three-position four-way valve (5) are also connected to the second relief valve (6B), the 3rd relief valve (6C), are connected with the first relief valve (6A) between described oil feed pump (3) and three-position four-way valve (5).
2. energy-conservation second voltage regulation loop according to claim 1, it is characterized in that: the overflow working pressure of described first relief valve (6A), the second relief valve (6B) and the 3rd relief valve (6C) is respectively P6A, P6B and P6C, and between them, pressure size is P6A > P6C > P6B.
3. energy-conservation second voltage regulation loop according to claim 1, it is characterized in that: described fuel tank (1) and oil feed pump (3) are connected with strainer (2), described first relief valve (6A), the second relief valve (6B) are all connected with fuel tank (1) by secondary filter (4) with the outlet end of the 3rd relief valve (6C).
4. energy-conservation second voltage regulation loop according to claim 1, is characterized in that: described solenoid valve is Solenoid ball valve.
5. energy-conservation second voltage regulation loop according to claim 4, is characterized in that: an oil outlet of described three-position four-way valve (5) is connected with the oil inlet end from return one-way cylinder (11) by non-return valve (12), the first accumulator (9A), the first Solenoid ball valve (10A) successively; Another oil outlet of three-position four-way valve (5) is connected with the oil inlet end from return one-way cylinder (11) by the 3rd Solenoid ball valve (10C), the second accumulator (9B), the second Solenoid ball valve (10B) successively.
6. energy-conservation second voltage regulation loop according to claim 5, is characterized in that: described first relief valve (6A) is serially connected with the first hydralic pressure gauge (7A); Described first accumulator (9A) is in series with the first pressure relay (8A), the 3rd hydralic pressure gauge (7C) successively; Second accumulator (9B) is in series with the second pressure relay (8B), the second hydralic pressure gauge (7B) successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420584726.XU CN204113776U (en) | 2014-10-11 | 2014-10-11 | A kind of energy-conservation second voltage regulation loop of hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420584726.XU CN204113776U (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 | Publication Date |
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| CN204113776U true CN204113776U (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420584726.XU Withdrawn - After Issue CN204113776U (en) | 2014-10-11 | 2014-10-11 | A kind of energy-conservation second voltage regulation loop of hydraulic system |
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| CN (1) | CN204113776U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265703A (en) * | 2014-10-11 | 2015-01-07 | 安徽合力股份有限公司 | Energy saving secondary pressure regulating loop circuit of hydraulic system |
| CN105697436A (en) * | 2016-04-12 | 2016-06-22 | 浙江大学 | Hydraulic system with flow priority control function for small-volume blind cavity pressure control |
| CN108331794A (en) * | 2018-02-09 | 2018-07-27 | 安徽工程大学 | A kind of hydraulic shunting system of arbitrary distribution pressure ratio |
-
2014
- 2014-10-11 CN CN201420584726.XU patent/CN204113776U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265703A (en) * | 2014-10-11 | 2015-01-07 | 安徽合力股份有限公司 | Energy saving secondary pressure regulating loop circuit of hydraulic system |
| CN104265703B (en) * | 2014-10-11 | 2016-08-03 | 安徽合力股份有限公司 | A kind of energy-conservation second voltage regulation loop of hydraulic system |
| CN105697436A (en) * | 2016-04-12 | 2016-06-22 | 浙江大学 | Hydraulic system with flow priority control function for small-volume blind cavity pressure control |
| CN105697436B (en) * | 2016-04-12 | 2017-07-28 | 浙江大学 | The small volume cell pressure control hydraulic system that a kind of flow is preferentially supplied |
| CN108331794A (en) * | 2018-02-09 | 2018-07-27 | 安徽工程大学 | A kind of hydraulic shunting system of arbitrary distribution pressure ratio |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150121 Effective date of abandoning: 20160803 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |