CN101893008A - Rapid hydraulic drive system - Google Patents
Rapid hydraulic drive system Download PDFInfo
- Publication number
- CN101893008A CN101893008A CN 201010244637 CN201010244637A CN101893008A CN 101893008 A CN101893008 A CN 101893008A CN 201010244637 CN201010244637 CN 201010244637 CN 201010244637 A CN201010244637 A CN 201010244637A CN 101893008 A CN101893008 A CN 101893008A
- Authority
- CN
- China
- Prior art keywords
- oil
- drive system
- hydraulic drive
- rapid hydraulic
- airtight cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to a rapid hydraulic drive system which comprises an oil storage tank, an oil pump, a change valve and an oil cylinder, wherein the oil cylinder is internally provided with a piston which divides the oil cylinder into a first airtight cavity and a second airtight cavity; the piston is connected with a piston rod which is arranged in the second airtight cavity in a penetrating mode and penetrates out of the oil cylinder; the oil storage tank is connected with the oil circuit of the first airtight cavity through the oil pump by means of the oil supply circuit of the change valve; the second airtight cavity is full of gas; preferably, the oil cylinder is also provided with a cushion cavity, and the rapid hydraulic drive system also comprises an air storage tank, a gas circuit check valve, an oil discharge tank, an oil circuit check valve, an energy accumulator, an oil circuit pressure gage, a relief valve, an overflow oil tank, a temperature controller and a control unit; and the control unit is respectively and electrically connected with the oil pump and the change valve. The rapid hydraulic drive system of the invention has high hydraulic drive speed, high hydraulic piston motion frequency, low cost and simple structure, and is suitable for large-scale generalization and application.
Description
Technical field
The present invention relates to the drive system technical field, particularly the hydraulic driving system technical field specifically is a kind of rapid hydraulic drive system, and its conventional hydraulic driving system speed wants fast, hydraulic piston motion frequency height.
Background technique
At present, application of hydraulic system more and more widely has been applied in a plurality of fields, for example can be used in the manufacturing field of solar facilities, is used for punch press punching and flanging process.
Hydraulic system be with fluid as working medium, utilize fluid pressure can and the package unit by the work of the operating hydraulically operated actuator of annexes such as control valve, acting as by changing pressure of hydraulic system increases active force.
A complete hydraulic system is made up of five parts, i.e. dynamical element, executive component, control unit, auxiliary element (annex) and hydraulic oil.The effect of dynamical element is the pressure energy that the mechanical energy of prime mover is converted to liquid, refers to the oil pump in the hydraulic system, and it provides power to whole hydraulic system.The structural type of oil pump generally has gear pump, vane pump and plunger pump; The effect of executive component (as oil hydraulic cylinder and oil hydraulic motor) is that the pressure with liquid can be converted to mechanical energy, drives load and does straight reciprocating motion or rotation motion; Control unit (being various hydrovalves) controls and regulates pressure, flow and the direction of liquid in hydraulic system; Auxiliary element comprises fuel tank, oil purifier, oil pipe and pipe joint, seal ring, quick release coupling, high-pressure ball valve, hose assembly, pressure measuring tie-in, pressure gauge, oil level indicator, oil thermometer etc.; Hydraulic oil is the working medium that transmits energy in the hydraulic system, and several big classes such as various mineral oil, emulsified liquid and Synthetic Hydraulic Oil are arranged.
But the major defect of existing common hydraulic system is that speed is slow, and complex structure, and used element is many.Existing rapid hydraulic drive system then need adopt servovalve or Proportional valve, and not only energy consumption is big for it, the cost height, and to the oil contamination sensitivity, also inconvenience realizes computer control.
Therefore, expect a kind of quick hydraulic system, its hydraulic driving speed is fast, hydraulic piston motion frequency height, and also cost is low, simple in structure.
Summary of the invention
The objective of the invention is to have overcome above-mentioned shortcoming of the prior art, a kind of rapid hydraulic drive system is provided, its hydraulic driving speed is fast, hydraulic piston motion frequency height, and also cost is low, simple in structure, is suitable for large-scale promotion application.
To achieve these goals, rapid hydraulic drive system of the present invention has adopted following technological scheme:
This rapid hydraulic drive system, comprise fuel reserve tank, oil pump, selector valve and oil cylinder, thereby be provided with piston in the described oil cylinder and be divided into the first airtight cavity and the second airtight cavity by described piston, described piston is connected with piston rod, described piston rod wears the described second airtight cavity and passes described oil cylinder, be characterized in that described fuel reserve tank is connected the described second airtight cavity gassy by described oil pump via the fuel feeding road of described selector valve with the described first airtight cavity oil circuit.
Preferably, described rapid hydraulic drive system also comprises gas holder and gas circuit one-way valve, and described gas holder is connected with the described second airtight cavity gas circuit by described gas circuit one-way valve.
Preferably, described oil cylinder also has buffer cavity, and described buffer cavity is communicated with the described second airtight cavity gas circuit.
More preferably, described gas circuit one-way valve is a source of the gas bigeminy part.
More preferably, described rapid hydraulic drive system also comprises the gas circuit pressure gauge, and described gas circuit pressure gauge is connected in the gas circuit that connects between described gas holder and the described gas circuit one-way valve.
Preferably, described rapid hydraulic drive system also comprises the draining case, and described draining case is connected with the described first airtight cavity oil circuit by the draining road of described commutator.
More preferably, described fuel reserve tank and described draining case are same fuel tank.
Preferably, described rapid hydraulic drive system also comprises the oil circuit one-way valve, and described fuel reserve tank is connected with described selector valve oil circuit by described oil circuit one-way valve.
Preferably, described rapid hydraulic drive system also comprises accumulator, and described accumulator is connected in the oil circuit that connects between described fuel reserve tank and the described selector valve.
Preferably, described rapid hydraulic drive system also comprises the oil circuit pressure gauge, and described oil circuit pressure gauge is connected in the oil circuit that connects between described fuel reserve tank and the described selector valve.
More preferably, described oil circuit pressure gauge is a pressure gauge with electric contact.
Preferably, described rapid hydraulic drive system also comprises relief valve and oil spilling case, and described oil spilling case is connected in the oil circuit that connects between described fuel reserve tank and the described selector valve by described relief valve.
More preferably, described relief valve is an electromagnetic relief valve.
More preferably, described oil spilling case and described fuel reserve tank are same fuel tank.
Preferably, described selector valve is a solenoid directional control valve.
Preferably, described rapid hydraulic drive system also comprises oil purifier, and described fuel reserve tank is connected with described oil pump oil circuit by described oil purifier.
Preferably, described rapid hydraulic drive system also comprises temperature controller, and described temperature controller is connected in the oil circuit that connects between described fuel reserve tank and the described selector valve.
Preferably, described rapid hydraulic drive system also comprises control unit, and described control unit circuit respectively connects described oil pump and described selector valve.
Beneficial effect of the present invention is specific as follows:
1, the present invention uses innovation design idea, in the first airtight cavity of oil cylinder is liquid oil, in the second airtight cavity is gas, thereby oil-gas is running alternately, makes the steadily high-speed and high-efficiency combination of gentle moving system of high pressure of hydraulic system, has successfully realized the target of high pressure+high speed, hydraulic driving speed is fast, hydraulic piston motion frequency height, and cost is low, simple in structure, is suitable for large-scale promotion application.
2, accumulator of the present invention is connected in the oil circuit that connects between described fuel reserve tank and the described selector valve, thereby when piston during to the motion of the first airtight cavity (mainly being when not needing fuel feeding), oil pump can enter the high pressure oil storage in the accumulator, and when the needs fuel feeding, oil can be supplied with oil cylinder simultaneously from accumulator and oil pump, thereby press down fast, simultaneously can play buffer function, make that the oil pressure in the oil cylinder is steady, design ingenious uniqueness, promote systematic function, be suitable for large-scale promotion application.
Description of drawings
Fig. 1 is the structure connection diagram of a specific embodiment of the present invention.
Embodiment
In order more to be expressly understood technology contents of the present invention, describe in detail especially exemplified by following examples, its purpose only is better to understand content of the present invention and unrestricted protection scope of the present invention.
See also shown in Figure 1, rapid hydraulic drive system of the present invention comprises fuel reserve tank 1, oil pump 2, selector valve 3 and oil cylinder 4, thereby be provided with piston 5 in the described oil cylinder 4 and be divided into the first airtight cavity 41 and the second airtight cavity 42 by described piston 5, described piston 5 is connected with piston rod 6, described piston rod 6 wears the described second airtight cavity 42 and passes described oil cylinder 4, described fuel reserve tank 1 is connected described second airtight cavity 42 gassies by described oil pump 2 via the fuel feeding road of described selector valve 3 with described first airtight cavity 41 oil circuits.
If the tightness of the second airtight cavity 42 is very good, then can not use gas holder 7.Preferably, described rapid hydraulic drive system also comprises gas holder 7 and gas circuit one-way valve 8, and described gas holder 7 is connected with described second airtight cavity 42 gas circuits by described gas circuit one-way valve 8.In specific embodiments of the invention, described gas circuit one-way valve 8 is source of the gas bigeminy parts.Source of the gas bigeminy part is an one-way valve, also is a pressure regulator valve, only allows gas from gas holder 7 to oil cylinder 4 the second airtight cavity 42, and guarantees that the air pressure in the second airtight cavity 42 is not less than setting value.When piston 5 during to 42 motions of the second airtight cavity, air pressure in the second airtight cavity 42 can be higher than setting value, at this moment, gas in the second airtight cavity 42 can not flow in the gas holder 7, when piston 5 when the second airtight cavity 42 moves to the end, the second airtight cavity, 42 spaces are 0, and this moment, gas can be stored in the pipeline between the second airtight cavity 42 and the source of the gas bigeminy part.Certainly, piston 5 can not move to the end to the second airtight cavity 42, decides according to job requirement; When piston 5 during to 41 motions of the first airtight cavity, the air pressure in the second airtight cavity 42 constantly reduces, if be lower than setting value, this source of the gas bigeminy part can be opened and supply gas, and gas holder 7 plays the effect of make-up gas.
If do not use gas holder 7, in another specific embodiment of the present invention, can also adopt following replacement scheme: described oil cylinder 4 also has the buffer cavity (not shown), and described buffer cavity is communicated with described second airtight cavity 42 gas circuits.Guarantee piston 5 when the second airtight cavity 42 moves to the end, gas can be contained in the buffer cavity.
In specific embodiments of the invention, described rapid hydraulic drive system also comprises gas circuit pressure gauge 9, and described gas circuit pressure gauge 9 is connected in the gas circuit that connects between described gas holder 7 and the described gas circuit one-way valve 8.
Preferably, described rapid hydraulic drive system also comprises draining case 10, and described draining case 10 is connected with described first airtight cavity 41 oil circuits by the draining road of described commutator 3.In specific embodiments of the invention, described fuel reserve tank 1 and described draining case 10 are same fuel tank.Thereby the liquid oil that comes out from the draining road will directly flow back to the fuel reserve tank 1, directly recycling.
Preferably, described rapid hydraulic drive system also comprises oil circuit one-way valve 11, and described fuel reserve tank 1 is connected with described selector valve 3 oil circuits by described oil circuit one-way valve 11.
Preferably, described rapid hydraulic drive system also comprises accumulator 12, and described accumulator 12 is connected in the oil circuit that connects between described fuel reserve tank 1 and the described selector valve 3.In specific embodiments of the invention, described accumulator 12 is connected in the oil circuit that connects between described oil circuit one-way valve 11 and the described selector valve 3.Thereby at piston 5 during to 41 motions of the first airtight cavity (mainly being when not needing fuel feeding), oil pump 2 can enter the high pressure oil storage in the accumulator 12, when the needs fuel feeding, oil can be supplied with oil cylinder 4 simultaneously from accumulator 12 and oil pump 2, thereby snap action piston 5 makes it press to the second airtight cavity 42, and accumulator 12 can play buffer function simultaneously, makes oil pressure reach certain numerical value, guarantee pressure stability, thereby make that the oil pressure in the oil cylinder 4 is steady.
Preferably, described rapid hydraulic drive system also comprises oil circuit pressure gauge 13, and described oil circuit pressure gauge 13 is connected in the oil circuit that connects between described fuel reserve tank 1 and the described selector valve 3.In specific embodiments of the invention, described oil circuit pressure gauge 13 is pressure gauge with electric contacts, and described pressure gauge with electric contact is connected in the oil circuit that connects between described oil circuit one-way valve 11 and the described selector valve 3.Pressure gauge with electric contact can be indicated oil pressure numerical value in real time, is convenient to observe and monitoring, avoids occurring that oil pressure is too high causes danger.
Preferably, described rapid hydraulic drive system also comprises relief valve 14 and oil spilling case 15, and described oil spilling case 15 is connected in the oil circuit that connects between described fuel reserve tank 1 and the described selector valve 3 by described relief valve 14.In specific embodiments of the invention, described relief valve 14 is electromagnetic relief valves, and described electromagnetic relief valve is connected in the oil circuit that connects between described oil circuit one-way valve 11 and the described selector valve 3, and described oil spilling case 15 and described fuel reserve tank 1 are same fuel tank.Thereby will directly flow back to the fuel reserve tank 1 from the liquid oil that relief valve 14 comes out, directly recycling.Electromagnetic relief valve can keep oil pressure to be no more than setting value, and when oil pressure surpassed setting value, unnecessary oil will release and reclaim, and it is an one-way valve, can set its earial drainage force value as required.
Described selector valve 3 can be any suitable selector valve.In specific embodiments of the invention, described selector valve 3 is solenoid directional control valves.
In specific embodiments of the invention, described rapid hydraulic drive system also comprises oil purifier 16, and described fuel reserve tank 1 is connected with described oil pump 2 oil circuits by described oil purifier 16.
Preferably, described rapid hydraulic drive system also comprises temperature controller 17, and described temperature controller 17 is connected in the oil circuit that connects between described fuel reserve tank 1 and the described selector valve 3.In specific embodiments of the invention, described temperature controller 17 is connected to described oil purifier 16.
Preferably, described rapid hydraulic drive system also comprises the control unit (not shown), and described control unit circuit respectively connects described oil pump 2 and described selector valve 3.In specific embodiments of the invention, described control unit circuit respectively connects described oil pump 2, described solenoid directional control valve, described source of the gas bigeminy part, described gas circuit pressure gauge 9, described oil circuit one-way valve 11, described accumulator 12, described pressure gauge with electric contact, described electromagnetic relief valve and described temperature controller 16.
The working principle of above-mentioned rapid hydraulic drive system is summarized as follows: because solenoid directional control valve directly is connected with oil cylinder 4, during fuel feeding, open on the fuel feeding road of solenoid directional control valve, the high pressure oil that comes out from oil pump 2 enters the first airtight cavity 41 of oil cylinder 4 fast by the fuel feeding road of solenoid directional control valve, promote piston 5 and shift to the second airtight cavity 42, compress the pressurized gas in the second airtight cavity 42 simultaneously; Compression pressure is increased; After realizing that piston rod 6 moves down execution (for example punching press), the solenoid directional control valve commutation, open on the draining road, oil pressure is 0, the first airtight cavity 41 fast pressure relief, and pressurized gas air pressure is the highest in the second airtight cavity 42 at this moment, because the effect of pressurized gas in the second airtight cavity 42, make piston 5 shift to the first airtight cavity 41 fast, oil flows back to fuel reserve tank 1 the inside, reuses.
This system employs innovation design idea adopts the alternately running of oil-gas, makes the steadily high-speed and high-efficiency combination of gentle moving system of high pressure of hydraulic system, has successfully realized the target of high pressure+high speed.
Use numerical control hydraulic punch press (XS8-12T) stable working of this system, easy to operate, the precision height, speed is fast.During system works, oil pump 2 outlet pressure are set up at 100～120Kg/cm
2, the compression pressure of the second airtight cavity 42 of oil cylinder 4 is at 8～9Kg/cm
2The time, when stroke was 50mm, the single-point drawing velocity reached per minute 90 times back and forth, and single cylinder stamping-out pressure reaches 15 tons.Satisfy the requirement in solar energy inside and outside bucket punching and anti-hole fully.
By the reasonable Arrangement to oil-gas double-action pressure cylinder (being above-mentioned oil cylinder 4), the numerical control hydraulic punch press can once be finished solar energy inside and outside bucket punching and the whole technologies in anti-hole; Different size can conveniently switch on the PLC man-machine interface, and working efficiency is very high.
To sum up, rapid hydraulic drive system hydraulic driving speed of the present invention is fast, hydraulic piston motion frequency height, and also cost is low, simple in structure, is suitable for large-scale promotion application.
In this specification, the present invention is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (11)
1. rapid hydraulic drive system, comprise fuel reserve tank, oil pump, selector valve and oil cylinder, thereby be provided with piston in the described oil cylinder and be divided into the first airtight cavity and the second airtight cavity by described piston, described piston is connected with piston rod, described piston rod wears the described second airtight cavity and passes described oil cylinder, it is characterized in that described fuel reserve tank is connected the described second airtight cavity gassy by described oil pump via the fuel feeding road of described selector valve with the described first airtight cavity oil circuit.
2. rapid hydraulic drive system according to claim 1 is characterized in that, described rapid hydraulic drive system also comprises gas holder and gas circuit one-way valve, and described gas holder is connected with the described second airtight cavity gas circuit by described gas circuit one-way valve.
3. rapid hydraulic drive system according to claim 1 is characterized in that described oil cylinder also has buffer cavity, and described buffer cavity is communicated with the described second airtight cavity gas circuit.
4. rapid hydraulic drive system according to claim 1 is characterized in that described rapid hydraulic drive system also comprises the draining case, and described draining case is connected with the described first airtight cavity oil circuit by the draining road of described commutator.
5. rapid hydraulic drive system according to claim 4 is characterized in that, described fuel reserve tank and described draining case are same fuel tank.
6. rapid hydraulic drive system according to claim 1 is characterized in that described rapid hydraulic drive system also comprises the oil circuit one-way valve, and described fuel reserve tank is connected with described selector valve oil circuit by described oil circuit one-way valve.
7. rapid hydraulic drive system according to claim 1 is characterized in that described rapid hydraulic drive system also comprises accumulator, and described accumulator is connected in the oil circuit that connects between described fuel reserve tank and the described selector valve.
8. rapid hydraulic drive system according to claim 1, it is characterized in that, described rapid hydraulic drive system also comprises relief valve and oil spilling case, and described oil spilling case is connected in the oil circuit that connects between described fuel reserve tank and the described selector valve by described relief valve.
9. rapid hydraulic drive system according to claim 8 is characterized in that, described oil spilling case and described fuel reserve tank are same fuel tank.
10. rapid hydraulic drive system according to claim 1 is characterized in that described rapid hydraulic drive system also comprises temperature controller, and described temperature controller is connected in the oil circuit that connects between described fuel reserve tank and the described selector valve.
11. rapid hydraulic drive system according to claim 1 is characterized in that, described rapid hydraulic drive system also comprises control unit, and described control unit circuit respectively connects described oil pump and described selector valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010244637 CN101893008A (en) | 2010-08-03 | 2010-08-03 | Rapid hydraulic drive system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010244637 CN101893008A (en) | 2010-08-03 | 2010-08-03 | Rapid hydraulic drive system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101893008A true CN101893008A (en) | 2010-11-24 |
Family
ID=43102308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010244637 Pending CN101893008A (en) | 2010-08-03 | 2010-08-03 | Rapid hydraulic drive system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101893008A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362895A (en) * | 2013-07-31 | 2013-10-23 | 常州神力电机股份有限公司 | Oil inlet system of 160T punch press overload protection hydraulic oil cylinder |
| CN104832498A (en) * | 2015-03-12 | 2015-08-12 | 南车株洲电力机车有限公司 | Oil feeding device |
| CN105730306A (en) * | 2016-04-21 | 2016-07-06 | 北京科技大学 | Pure electronic dump truck hydraulic lifting system and operation method |
| CN106270108A (en) * | 2016-08-29 | 2017-01-04 | 南通锻压设备股份有限公司 | Separate unit integrated form blanking buffer unit |
| CN106363076A (en) * | 2016-08-29 | 2017-02-01 | 天津市天锻压力机有限公司 | Hydraulic system for inner high-pressure steel pipe hydraulic perforating of hydroforming hydraulic machine |
| CN109450358A (en) * | 2018-11-20 | 2019-03-08 | 杭州光曲智能科技有限公司 | A kind of new energy photovoltaic generating system of roofing transformation |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064847A (en) * | 1991-02-28 | 1992-09-30 | 株式会社日立制作所 | Hydraulic hoist |
| DE19928540A1 (en) * | 1999-04-30 | 2000-11-09 | Guenter Diehm | Hydraulic positioning device has cylinder-adjustment piston unit, where piston separates cylinder into air and oil filled chambers |
| CN1526960A (en) * | 2003-09-25 | 2004-09-08 | 浙江大学 | Single rod equal area double acting hydraulic cylinder capable of balancing weight |
| CN2747388Y (en) * | 2004-10-15 | 2005-12-21 | 苏泉窝 | Gas-liquid converting driving device |
| CN201149012Y (en) * | 2007-12-28 | 2008-11-12 | 亨特尔(天津)科技开发有限公司 | Molded board rotating hydraulic device |
| CN101476571A (en) * | 2009-01-24 | 2009-07-08 | 燕山大学 | Parameter self-adapting and regulation leather bag type hydraulic accumulator |
| CN101566175A (en) * | 2009-05-20 | 2009-10-28 | 杨德君 | Gas pressurized device |
| CN201747684U (en) * | 2010-08-03 | 2011-02-16 | 项建卫 | Rapidly hydraulic driving system |
-
2010
- 2010-08-03 CN CN 201010244637 patent/CN101893008A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064847A (en) * | 1991-02-28 | 1992-09-30 | 株式会社日立制作所 | Hydraulic hoist |
| DE19928540A1 (en) * | 1999-04-30 | 2000-11-09 | Guenter Diehm | Hydraulic positioning device has cylinder-adjustment piston unit, where piston separates cylinder into air and oil filled chambers |
| CN1526960A (en) * | 2003-09-25 | 2004-09-08 | 浙江大学 | Single rod equal area double acting hydraulic cylinder capable of balancing weight |
| CN2747388Y (en) * | 2004-10-15 | 2005-12-21 | 苏泉窝 | Gas-liquid converting driving device |
| CN201149012Y (en) * | 2007-12-28 | 2008-11-12 | 亨特尔(天津)科技开发有限公司 | Molded board rotating hydraulic device |
| CN101476571A (en) * | 2009-01-24 | 2009-07-08 | 燕山大学 | Parameter self-adapting and regulation leather bag type hydraulic accumulator |
| CN101566175A (en) * | 2009-05-20 | 2009-10-28 | 杨德君 | Gas pressurized device |
| CN201747684U (en) * | 2010-08-03 | 2011-02-16 | 项建卫 | Rapidly hydraulic driving system |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362895A (en) * | 2013-07-31 | 2013-10-23 | 常州神力电机股份有限公司 | Oil inlet system of 160T punch press overload protection hydraulic oil cylinder |
| CN103362895B (en) * | 2013-07-31 | 2016-05-18 | 常州神力电机股份有限公司 | A kind of 160 tons of punch press overload protection hydraulic jack oil feeding systems |
| CN104832498A (en) * | 2015-03-12 | 2015-08-12 | 南车株洲电力机车有限公司 | Oil feeding device |
| CN105730306A (en) * | 2016-04-21 | 2016-07-06 | 北京科技大学 | Pure electronic dump truck hydraulic lifting system and operation method |
| CN106270108A (en) * | 2016-08-29 | 2017-01-04 | 南通锻压设备股份有限公司 | Separate unit integrated form blanking buffer unit |
| CN106363076A (en) * | 2016-08-29 | 2017-02-01 | 天津市天锻压力机有限公司 | Hydraulic system for inner high-pressure steel pipe hydraulic perforating of hydroforming hydraulic machine |
| CN106363076B (en) * | 2016-08-29 | 2019-01-08 | 天津市天锻压力机有限公司 | The hydraulic system of the hydraulic punching of Steel Tube Special in a kind of liquid-filling shaping hydraulic machine |
| CN106270108B (en) * | 2016-08-29 | 2019-01-29 | 南通锻压设备如皋有限公司 | Separate unit integrated form blanking buffer unit |
| CN109450358A (en) * | 2018-11-20 | 2019-03-08 | 杭州光曲智能科技有限公司 | A kind of new energy photovoltaic generating system of roofing transformation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201747684U (en) | Rapidly hydraulic driving system | |
| CN101893008A (en) | Rapid hydraulic drive system | |
| CN201769389U (en) | Hydraulic press | |
| RU52125U1 (en) | ELECTRIC HYDRAULIC DRIVE PUMP UNIT | |
| CN108383039B (en) | A kind of energy-saving stepping type lifter structure hydraulic control system | |
| CN105782147A (en) | Double-acting hydraulic control system of supercharging device | |
| CN107654333A (en) | A kind of fluid pressure type wave-power device | |
| CN105757015A (en) | Hydraulic driven type non-intermittent supercharging device | |
| CN105757016A (en) | Hydraulic control system of supercharging device | |
| CN105317766A (en) | Integrated hydraulic open-close machine | |
| CN102536924A (en) | Single-hydraulic cylinder single-acting hydraulic system of supercharger | |
| CN203926236U (en) | Single pump dual-speed hydraulic system | |
| CN102464362B (en) | Device for desalinating seawater by transmitting wind energy by hydraulic system | |
| CN201882933U (en) | Device for transmitting wind energy to desalt seawater for hydraulic system | |
| CN201448303U (en) | Device for transforming gas and liquid | |
| CN201372975Y (en) | Hydraulic intensifier for ultra-high pressure tool and ultra-high pressure system using same | |
| CN100387835C (en) | Double-body multi-cylinder high-pressure grouting pump | |
| CN103862705A (en) | Liquid-gas conversion supercharging device of numerical control turret punch | |
| CN203926176U (en) | Integrated hydraulic hoists | |
| CN203144016U (en) | Ultrahigh voltage electric hydraulic pump station | |
| CN202597010U (en) | Pneumatic liquid charge pump for coal mine | |
| CN202558555U (en) | Goods shelf lifting device with function of height display | |
| CN202318283U (en) | Storage rack capable of adjusting height | |
| CN2799942Y (en) | Integrated electro-hydraulic actuator capable of quickly acting and regulating | |
| CN203835648U (en) | Pneumatic and hydraulic pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20101124 |