CN205136174U - Energy -saving constant pressure oil source system - Google Patents
Energy -saving constant pressure oil source system Download PDFInfo
- Publication number
- CN205136174U CN205136174U CN201520798588.XU CN201520798588U CN205136174U CN 205136174 U CN205136174 U CN 205136174U CN 201520798588 U CN201520798588 U CN 201520798588U CN 205136174 U CN205136174 U CN 205136174U
- Authority
- CN
- China
- Prior art keywords
- pressure
- oil source
- constant pressure
- source system
- accumulator
- 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 - Fee Related
Links
Abstract
The utility model provides an energy -saving constant pressure oil source system, works as the utility model discloses use behind the hydraulic pressure servo of intermittent type nature oil expenses, the set pressure of electromagnetism unloading valve is higher than the set pressure of relief pressure valve all the time, through the pressure regulating effect of relief pressure valve and the steady voltage effect of second energy storage ware, has effectively guaranteed the stability of constant pressure oil source system output pressure. At the constant pressure oil source when oil mass is less for the system, voltol oil in the first energy storage ware in ration hydraulic pump exit can be supplied with in the entry of relief pressure valve as the oil sources in the long period, the export overwhelming majority time of ration hydraulic pump all is in the off -load state, only be less than 83% o'clock of electromagnetism unloading valve set pressure when the inlet pressure of electromagnetism unloading valve, electromagnetism unloading valve entry is just cut off with the passageway of oil return opening, because the long -time off -load state that is in of quantitative hydraulic pump export, so the spill losses that is produced by constant pressure oil source system self is minimum, thereby the difficult problem that current constant pressure oil source energy consumption is big and the delivery pressure is unstable has effectively been overcome.
Description
Technical field
The utility model belongs to technical field of hydraulic, particularly relates to a kind of energy-saving constant pressure oil source system, is applicable to the Hydrauservo System of intermittence oil.
Background technique
In Hydrauservo System, in order to ensure the control performance of servovalve, then need the inlet pressure of servovalve to keep constant, need to adopt constant pressure oil source, and the constant pressure oil source of routine mainly contain following three kinds of forms for this reason:
1. relief valve and accumulator are set at quantitative delivery side of pump;
2. guide type electromagnetic unloading valve and accumulator are set at quantitative delivery side of pump;
3. directly constant pressure variable displacement pump is adopted.
For the constant pressure oil source of the first form, the delivery pressure of metering pump is set up by the relief valve in its outlet port, and accumulator is used for absorbing pressure fluctuation, and it has the advantages that structural type is simple and pressure fluctuation is little; But the relief power loss of this kind of form constant pressure oil source is comparatively large, and system heating is serious, inefficiency.
For the constant pressure oil source of the second form, accumulator is connected with guide's hydraulic fluid port of unloading electromagnetic valve, when system pressure (pressure namely in accumulator) reaches the setting value of unloading electromagnetic valve, valve body is opened by the remote control mouth of unloading electromagnetic valve by high pressure oil completely, oil hydraulic pump is made to be in unloaded unloading condition, and in unloading electromagnetic valve, be integrated with one-way valve, therefore system pressure is kept by accumulator; When system pressure drops to a certain definite value, unloading electromagnetic valve is closed, and system is boosted, simultaneously oil-filled to accumulator, it has the advantages that working efficiency is high and spill losses is little, and under actuator's action condition infrequently, does not even need to arrange cooler and cool hydraulic system; But, the range of pressure fluctuations of this kind of form constant pressure oil source is comparatively large, and within being generally 17% of unloading electromagnetic valve set pressure, and it is larger that servovalve inlet pressure can be caused to fluctuate, thus affect the factor for enlarged flow of servovalve, be therefore unfavorable for the control performance ensureing servovalve.
For the constant pressure oil source of the third form, when hydraulic system delivery pressure changes, constant pressure variable displacement pump can change the position of variable cylinder by controlling pilot valve, thus the discharge capacity of adjustment constant pressure variable displacement pump self, therefore constant pressure variable displacement pump can export according to the discharge capacity of the change adjustment of system pressure self, and then the system of maintenance delivery pressure becomes; Compared with the first form, really the working efficiency of hydraulic system can greatly be improved, and reduce the energy consumption of system, but show after practical application, the interior discharge of constant pressure variable displacement pump self can increase with the rising of pressure, volumetric efficiency also can decrease, even if when constant pressure variable displacement pump is in small displacement output state, the heating value of system is still obvious; In addition, when load flow produces larger change, the speed of response lower (being about 1Hz) of the pilot valve adjustment variable cylinder of constant pressure variable displacement pump self, makes constant pressure variable displacement pump in the process of flow automatic regulation, causes the delivery pressure of constant pressure oil source to occur larger fluctuation.
Can find out, the constant pressure oil source of above-mentioned three kinds of forms, can meet without any a kind of the requirement that working efficiency is high, delivery pressure fluctuation is little and energy consumption is low simultaneously.Therefore, need a kind of constant pressure oil source system of brand-new design badly, it should have, and working efficiency is high simultaneously, delivery pressure fluctuates little and that energy consumption is low feature.
Model utility content
For prior art Problems existing, the utility model provides a kind of energy-saving constant pressure oil source system, effectively can improve energy utilization rate, thus reduces energy consumption, and effectively can ensure the stable of delivery pressure.
To achieve these goals, the utility model adopts following technological scheme: a kind of energy-saving constant pressure oil source system, comprise quantitative hydraulic pump, unloading electromagnetic valve, reduction valve, high pressure filter, back pressure safety check, return filter, first accumulator, second accumulator, first pressure gauge and the second pressure gauge, the inlet port of described quantitative hydraulic pump is connected with fuel tank, the oil outlet of quantitative hydraulic pump is connected with the entrance of unloading electromagnetic valve, the return opening of unloading electromagnetic valve is connected with the return opening of the entrance of back pressure safety check and constant pressure oil source system, the outlet of unloading electromagnetic valve and the entrance of reduction valve, first accumulator and the first pressure gauge are connected, the drain tap of reduction valve is connected with fuel tank, the outlet of reduction valve and the entrance of high pressure filter, second accumulator and the second pressure gauge are connected, the outlet of high pressure filter is connected with the oil outlet of constant pressure oil source system, the described outlet of back pressure safety check is connected with the entrance of return filter, and the outlet of return filter is connected with fuel tank.
Described first accumulator and the second accumulator all adopt bag type accumulator.
The controlling method of the energy-saving constant pressure oil source system described in employing, comprises the steps:
Step one: before constant pressure oil source system is run first, is respectively the first accumulator and the second accumulator filling nitrogen, and the nitrogen pressure that fills of the first accumulator is 1.05F
ps, the nitrogen pressure that fills of the second accumulator is 0.75F
ps, wherein F
psfor the setup pressure value of the oil outlet of constant pressure oil source system;
Step 2: start quantitative hydraulic pump, power-off after the electromagnet of unloading electromagnetic valve obtains electric 15 seconds simultaneously, quantitative hydraulic pump realizes zero load startup;
Step 3: when constant pressure oil source system is run first, is manually adjusted to 1.4F by the setting pressure of unloading electromagnetic valve
ps, the setting pressure of reduction valve is adjusted to F
ps, wherein F
psfor the setup pressure value of the oil outlet of constant pressure oil source system.
The beneficial effects of the utility model:
After constant pressure oil source system of the present utility model is applied in the Hydrauservo System of intermittence oil, the setting pressure due to unloading electromagnetic valve is 1.4F
ps, therefore the pressure regulation spectrum of unloading electromagnetic valve is at 1.16F
ps~ 1.4F
psbetween, all the time higher than the setting pressure of reduction valve, by the pressure regulation effect of reduction valve and the pressure stabilization function of the second accumulator, effectively ensure that the stable of constant pressure oil source system delivery pressure.
When constant pressure oil source system oil amount of the present utility model is less, high pressure oil in first accumulator in quantitative hydraulic pump outlet port can be supplied in the entrance of reduction valve in a long time as oil sources, the quantitative hydraulic delivery side of pump overwhelming majority time is all in unloading condition, only have inlet pressure when unloading electromagnetic valve lower than unloading electromagnetic valve setting pressure 83% time, unloading electromagnetic valve cuts off the passage of entrance and return opening, constant pressure oil source system starts boosting, until be raised to setting pressure, then the passage of unloading electromagnetic valve entrance and return opening is opened automatically, quantitative hydraulic delivery side of pump is in unloading condition again, therefore the spill losses produced by constant pressure oil source system self is minimum, thus effectively overcome the difficult problem that existing constant pressure oil source energy consumption is large and delivery pressure is unstable.
Accompanying drawing explanation
Fig. 1 is the hydraulic schematic diagram of a kind of energy-saving constant pressure oil source system of the present utility model;
Fig. 2 is that in embodiment, the output flow of Hydrauservo System to constant pressure oil source requires figure;
In figure, 1-quantitative hydraulic pump, 2-unloading electromagnetic valve, 3-reduction valve, 4-high pressure filter, 5-back pressure safety check, 6-return filter, the 7-the first accumulator, the 8-the second accumulator, the 9-the first pressure gauge, the 10-the second pressure gauge, 11-fuel tank;
The inlet port of Sp-quantitative hydraulic pump, the oil outlet of Pp-quantitative hydraulic pump, the entrance of P2-unloading electromagnetic valve, the return opening of T2-unloading electromagnetic valve, the outlet of A2-unloading electromagnetic valve, the entrance of B3-reduction valve, the drain tap of Y3-reduction valve, the outlet of A3-reduction valve, the entrance of A4-high pressure filter, the outlet of B4-high pressure filter, the entrance of A5-back pressure safety check, the outlet of B5-back pressure safety check, the entrance of A6-return filter, the outlet of B6-return filter, the return opening of T0-constant pressure oil source system, the oil outlet of Ps-constant pressure oil source system,
Qmin-minimum load flow, Qmax-maximum load flow, t
1the demand cycle of-minimum load flow, t
2the demand cycle of-maximum load flow.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, a kind of energy-saving constant pressure oil source system, comprise quantitative hydraulic pump 1, unloading electromagnetic valve 2, reduction valve 3, high pressure filter 4, back pressure safety check 5, return filter 6, first accumulator 7, second accumulator 8, first pressure gauge 9 and the second pressure gauge 10, the inlet port Sp of described quantitative hydraulic pump 1 is connected with fuel tank 11, the oil outlet Pp of quantitative hydraulic pump 1 is connected with the entrance P2 of unloading electromagnetic valve 2, the oil return inlet T 2 of unloading electromagnetic valve 2 is connected with the oil return inlet T 0 of the entrance A5 of back pressure safety check 5 and constant pressure oil source system, the outlet A2 of the unloading electromagnetic valve 2 and entrance B3 of reduction valve 3, first accumulator 7 and the first pressure gauge 9 are connected, the drain tap Y3 of reduction valve 3 is connected with fuel tank 11, the outlet A3 of the reduction valve 3 and entrance A4 of high pressure filter 4, second accumulator 8 and the second pressure gauge 10 are connected, the outlet B4 of high pressure filter 4 is connected with the oil outlet Ps of constant pressure oil source system, the outlet B5 of described back pressure safety check 5 is connected with the entrance A6 of return filter 6, and the outlet B6 of return filter 6 is connected with fuel tank 11.
Described first accumulator 7 and the second accumulator 8 all adopt bag type accumulator.
In the present embodiment, Hydrauservo System to the specific requirement of the output flow of constant pressure oil source as shown in Figure 2, wherein, the demand cycle t of minimum load flow
1be 60 seconds, the demand cycle t of maximum load flow
2be 10 seconds, the setup pressure value F of the oil outlet Ps of constant pressure oil source system
psfor 16MPa, the model of quantitative hydraulic pump 1 is CBT-F440FP (40ml/r), the model of unloading electromagnetic valve 2 is DAW10A2-30/80G24NZ5L, the model of reduction valve 3 is DR105-5X/200YM, the model of high pressure filter 4 is ZU-H-100X5BP, the model of back pressure safety check 5 is H41H-16C (DN25), the model of return filter 6 is FRA-100X10F-TY, first accumulator 7 adopts volume to be the bag type accumulator of 40L, second accumulator 8 adopts volume to be the bag type accumulator of 10L, the range of the first pressure gauge 9 is 40MPa, the range of the second pressure gauge 10 is 25MPa, the volume of fuel tank 11 is 590L.
The controlling method of the energy-saving constant pressure oil source system described in employing, comprises the steps:
Step one: before constant pressure oil source system is run first, be respectively the first accumulator 7 and the second accumulator 8 filling nitrogen, the nitrogen pressure that fills of the first accumulator 7 is 1.05F
ps, be specially 16.8MPa, the nitrogen pressure that fills of the second accumulator 8 is 0.75F
ps, be specifically about 12MPa, wherein F
psfor the setup pressure value of the oil outlet Ps of constant pressure oil source system;
Step 2: start quantitative hydraulic pump 1, power-off after the electromagnet of unloading electromagnetic valve 2 obtains electric 15 seconds simultaneously, quantitative hydraulic pump 1 realizes zero load startup;
Step 3: when constant pressure oil source system is run first, is manually adjusted to 1.4F by the setting pressure of unloading electromagnetic valve 2
ps, be specially 22.4MPa, the setting pressure of reduction valve 3 be adjusted to F
ps, be specially 16MPa, wherein F
psfor the setup pressure value of the oil outlet Ps of constant pressure oil source system.
After constant pressure oil source system of the present utility model is applied in the Hydrauservo System of intermittence oil, the setting pressure due to unloading electromagnetic valve 2 is 1.4F
ps, therefore the pressure regulation spectrum of unloading electromagnetic valve 2 is at 1.16F
ps~ 1.4F
psbetween, all the time higher than the setting pressure of reduction valve 3, by the pressure regulation effect of reduction valve 3 and the pressure stabilization function of the second accumulator 8, effectively ensure that the stable of constant pressure oil source system delivery pressure.
When constant pressure oil source system oil amount is less, high pressure oil in first accumulator 7 in quantitative hydraulic pump 1 outlet port can be supplied in the entrance of reduction valve 3 in a long time as oil sources, the outlet overwhelming majority time of quantitative hydraulic pump 1 is all in unloading condition, only have inlet pressure when unloading electromagnetic valve 2 lower than unloading electromagnetic valve 2 setting pressure 83% time, unloading electromagnetic valve 2 cuts off the passage of entrance and return opening, constant pressure oil source system starts boosting, until be raised to setting pressure, then the passage of unloading electromagnetic valve 2 entrance and return opening is opened automatically, the outlet of quantitative hydraulic pump 1 is in unloading condition again, therefore the spill losses produced by constant pressure oil source system self is minimum, thus effectively overcome the difficult problem that existing constant pressure oil source energy consumption is large and delivery pressure is unstable.
Scheme in embodiment is also not used to limit scope of patent protection of the present utility model, does not allly depart from the equivalence that the utility model does and implements or change, and is all contained in the scope of the claims of this case.
Claims (2)
1. an energy-saving constant pressure oil source system, it is characterized in that: comprise quantitative hydraulic pump, unloading electromagnetic valve, reduction valve, high pressure filter, back pressure safety check, return filter, first accumulator, second accumulator, first pressure gauge and the second pressure gauge, the inlet port of described quantitative hydraulic pump is connected with fuel tank, the oil outlet of quantitative hydraulic pump is connected with the entrance of unloading electromagnetic valve, the return opening of unloading electromagnetic valve is connected with the return opening of the entrance of back pressure safety check and constant pressure oil source system, the outlet of unloading electromagnetic valve and the entrance of reduction valve, first accumulator and the first pressure gauge are connected, the drain tap of reduction valve is connected with fuel tank, the outlet of reduction valve and the entrance of high pressure filter, second accumulator and the second pressure gauge are connected, the outlet of high pressure filter is connected with the oil outlet of constant pressure oil source system, the described outlet of back pressure safety check is connected with the entrance of return filter, and the outlet of return filter is connected with fuel tank.
2. the energy-saving constant pressure oil source system of one according to claim 1, is characterized in that: described first accumulator and the second accumulator all adopt bag type accumulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520798588.XU CN205136174U (en) | 2015-10-14 | 2015-10-14 | Energy -saving constant pressure oil source system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520798588.XU CN205136174U (en) | 2015-10-14 | 2015-10-14 | Energy -saving constant pressure oil source system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205136174U true CN205136174U (en) | 2016-04-06 |
Family
ID=55621972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520798588.XU Expired - Fee Related CN205136174U (en) | 2015-10-14 | 2015-10-14 | Energy -saving constant pressure oil source system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205136174U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156379A (en) * | 2015-10-14 | 2015-12-16 | 东北大学 | Energy-saving constant-pressure oil source system and control method thereof |
| CN110886726A (en) * | 2019-11-08 | 2020-03-17 | 陕西航天动力高科技股份有限公司 | Double-buffer for outlet of diaphragm pump |
| CN113007159A (en) * | 2021-02-09 | 2021-06-22 | 中国煤炭科工集团太原研究院有限公司 | Hydraulic tensioning method, hydraulic tensioning device and continuous miner |
-
2015
- 2015-10-14 CN CN201520798588.XU patent/CN205136174U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156379A (en) * | 2015-10-14 | 2015-12-16 | 东北大学 | Energy-saving constant-pressure oil source system and control method thereof |
| CN105156379B (en) * | 2015-10-14 | 2017-03-08 | 东北大学 | A kind of energy-saving constant pressure oil source system and its control method |
| CN110886726A (en) * | 2019-11-08 | 2020-03-17 | 陕西航天动力高科技股份有限公司 | Double-buffer for outlet of diaphragm pump |
| CN113007159A (en) * | 2021-02-09 | 2021-06-22 | 中国煤炭科工集团太原研究院有限公司 | Hydraulic tensioning method, hydraulic tensioning device and continuous miner |
| CN113007159B (en) * | 2021-02-09 | 2023-03-10 | 中国煤炭科工集团太原研究院有限公司 | Hydraulic tensioning method, hydraulic tensioning device and continuous miner |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205136174U (en) | Energy -saving constant pressure oil source system | |
| CN201851716U (en) | Reducing valve | |
| CN102678994A (en) | Novel automatic decompression voltage and current stabilizer | |
| CN104989690B (en) | Overload relief valve | |
| CN104533886A (en) | Non-load starting device and method for variable hydraulic pump | |
| CN205401290U (en) | Energy storage ware return circuit is with guide's off -load overflow valve | |
| CN105485067B (en) | A kind of force control hydraulic pressure energy saving of system device | |
| CN201851726U (en) | Pilot overflow valve | |
| CN105156379A (en) | Energy-saving constant-pressure oil source system and control method thereof | |
| CN202356462U (en) | Hydraulic control loop of straightener | |
| CN104029366B (en) | The energy-conserving hydraulic control device of hydraulic injection molding machine | |
| CN203962363U (en) | Electric Electro-hydraulic Proportional Displacement pump with ratio pressure cutting control device | |
| CN113236616B (en) | Proportional variable pump control device and control method thereof | |
| CN204704187U (en) | Overload unloading valve | |
| CN111706563B (en) | Three-way speed regulating valve based on hydraulic motor-generator pressure compensator | |
| CN201233780Y (en) | Automatic water feeding device for high voltage liquid resistor | |
| CN205478592U (en) | Pressure control hydraulic system economizer | |
| CN212985658U (en) | Proportional speed regulating valve group | |
| CN210715319U (en) | Closed hydraulic system for energy accumulator speed regulation | |
| CN203476850U (en) | Flow control device of energy accumulator used for concrete pump truck and concrete pump truck | |
| CN201747689U (en) | Pressure regulating device of hydraulic system | |
| CN105257605A (en) | Energy conversation method and energy conversation device for pressure control hydraulic systems | |
| CN205689505U (en) | A kind of force control hydraulic pressure energy saving of system device | |
| CN102943712B (en) | Variable-flow fuel adjusting valve | |
| CN204573587U (en) | A kind of air cooling Roots pendular ring closed vacuum system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160406 Termination date: 20171014 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |