CN1439591A - Hydraulic lift energy-saving control system with hydraulic transformer - Google Patents
Hydraulic lift energy-saving control system with hydraulic transformer Download PDFInfo
- Publication number
- CN1439591A CN1439591A CN 03116048 CN03116048A CN1439591A CN 1439591 A CN1439591 A CN 1439591A CN 03116048 CN03116048 CN 03116048 CN 03116048 A CN03116048 A CN 03116048A CN 1439591 A CN1439591 A CN 1439591A
- Authority
- CN
- China
- Prior art keywords
- motor
- hydraulic
- pump
- pipeline
- way valve
- 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.)
- Granted
Links
- 230000001105 regulatory effect Effects 0.000 claims description 19
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000004146 energy storage Methods 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 7
- 230000002441 reversible effect Effects 0.000 abstract description 3
- 230000004044 response Effects 0.000 abstract description 2
- 239000002828 fuel tank Substances 0.000 description 11
- 230000008859 change Effects 0.000 description 7
- 230000001133 acceleration Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Landscapes
- Fluid-Pressure Circuits (AREA)
- Elevator Control (AREA)
Abstract
An energy-saving control system for hydraulic elevator features use of a hydraulic pressure changer composed of variable or quantitative pump and motor. Said pressure changer can get energy from constant-pressure network and provide it to load without pressure loss, or reverse the energy from load. Its avdantages are high dynamic response speed and pressure amplifying effect.
Description
Technical field
The present invention relates to a kind of hydraulic elevator energy-saving control system that adopts hydraulic transformer.
Background technology
Hydraulic elevator so far, has experienced the development course of valve control hydraulic efficiency pressure system to the variable frequency control hydraulic efficiency pressure system at the beginning of produce, and energy-saving and cost-reducing be one of key subjects of developing of this area research always.
Traditional valve control throttling governing system technology in present hydraulic elevator control system is the most ripe, most widely used general, and it mainly is to use the running velocity that throttling governing technology in the hydraulic technique is come the modulated pressure elevator.Its maximum advantage is exactly that system is succinct, and control is convenient, and price is low.But because the mode of throttling is adopted in speed governing, a big chunk expenditure of energy of system is at throttle orifice, so such system energy consumption is big, efficient is very low.
The volumetric speed control mode also is one of elevator mode of speed control, and along with the development of converter technique, the speed control system with adjustable displacement that adopts variable-frequency motor to drive quantitative pump/motor has also been made significant headway especially in recent years.This traditional valve controlled velocity modulation system of contrast of system has bearing power and adapts to, the advantage that descending energy is partially recycled, thus energy-conservation more many than valve control system, but installed power is still bigger, and, make the system cost costliness owing to adopted frequency converter.
Summary of the invention
The purpose of this invention is to provide a kind of hydraulic elevator energy-saving control system that adopts hydraulic transformer.Use the pressure-energy conversion principle and the Principles of Regulation of hydraulic transformer, the serial mechanism that adopts a quantitative pump/motor and a variable pump/motor is as energy transfer element, the high pressure liquid pressure energy that is stored in the energy storage there is not throttle loss ground supply low-voltage load, promote the elevator upward movement, thereby realize pressure transformation and transmission of energy from high to low.When elevator is descending, adopt the pressure-energy transfer mechanism of hydraulic transformer principle to become high pressure to load low pressure, the gravitional force that elevator is descended can reclaim, stores among the energy storage, thus the recovery and reuse of realization energy.
As follows in order to reach foregoing invention purpose the technical solution used in the present invention: as to comprise the hydraulic transformer of forming by variable pump/motor, fix-displacement pump/motor, an end of variable pump/motor is through the filter connected tank in the hydraulic transformer, the other end is connected with hydraulic control one-way valve with an end of quantitative pump/motor, variable pump/motor regulating mechanism, the safety valve of recharging oil device, the slippage pump of system respectively, and hydraulic control one-way valve also is connected with energy storage with first pressure sensor.
Quantitative pump/motor in the hydraulic transformer is by coupler and variable pump/motor mechanical connection, be connected with the photoelectric encoder that tests the speed by another coupler, the other end of quantitative pump/motor is connected with second pressure sensor with an end of major loop hydraulic control one-way valve, the other end of major loop hydraulic control one-way valve is connected with plunger cylinder with the 3rd pressure sensor.
The photoelectric encoder that tests the speed, hydraulic control one-way valve, variable pump/motor regulating mechanism, first, second and third pressure sensor of testing the speed on photoelectric encoder, major loop hydraulic control one-way valve, the plunger cylinder are electrically connected with computer control system respectively.
Be connected to manual lowering valve and manual pump between major loop hydraulic control one-way valve and the plunger cylinder.
Advantage of the present invention is: the hydraulic transformer technology is to grow up on the basis of constant pressure network secondary regulation technology, it is by this special pressure-energy conversion component of hydraulic transformer, from constant pressure network, extract the energy supply load, as pressure intensifier, it can not be adjusted into network pressure the arbitrary value in the pressure range with having throttle loss, thereby realizes the harmless transmission of energy; Voltage transformer transformation process is reversible, both can be to the load energy output, also can be from the load recuperated energy, thus realize the utilization again of energy; The dynamic response of hydraulic transformer is fast, can realize real-time control easily; Hydraulic transformer can use as pressure amplifier, produces the delivery pressure much higher than input pressure.
Description of drawings
Accompanying drawing is a structural principle scheme drawing of the present invention.
The specific embodiment
Accompanying drawing is for adopting the hydraulic elevator energy-saving control system structure principle chart of hydraulic transformer, wherein: the 1st, the variable pump/motor, one end is connected with filter 45 by pipeline 41, connect fuel tank 46 by pipeline 42, one end is by pipeline 31 and pipeline 32,30 connect, and with quantitative pump/motor 2 by 47 coaxial connections of coupler, the 2nd, quantitative pump/motor, one end is by pipeline 30 and pipeline 31,32 connect, the other end is connected with pressure sensor 13-2 by pipeline 29, the 3rd, photoelectric encoder tests the speed, be installed on another axle head of quantitative pump/motor 2 by another coupler (50), the 4th, the major loop hydraulic control one-way valve, one end is connected with pressure sensor 13-2 by pipeline 28, the other end is connected with pressure sensor 13-3 by pipeline 27, and the 5th, manual lowering valve, an end connects oil sump tank 46 by pipeline 39, the other end is connected with pressure sensor 13-3 by pipeline 26, the 6th, manual pump, an end connects oil sump tank 46 by pipeline 38, and the other end is by pipeline 24 and pipeline 23,25 connect, the 7th, plunger case, by pipeline 23 and pipeline 24,25 connect, and the 8th, the photoelectric encoder on the lift car is installed in lift car one side, the 9th, the slippage pump of system, one end connects oil sump tank 46 by pipeline 43, and the other end is by pipeline 34 and pipeline 33,35,36 connect, and the 10th, the safety valve of recharging oil device, one end connects oil sump tank 46 by pipeline 44, the other end is by pipeline 35 and pipeline 33,34,36 connect, and the 11st, the hydraulic control one-way valve of accumulator loop, an end connects energy storage 12 by pipeline 37, the other end is by pipeline 36 and pipeline 33,34,35 connect, the 12nd, bag type accumulator is by pipeline 37 and accumulator loop hydraulic control one-way valve 11, pipeline 38 connects 13-1,2, the 3rd, pressure sensor, pressure sensor 13-1 is connected pressure sensor 13-2 and pipeline 28 by pipeline 48 with pipeline 37,29 connect, pressure sensor 13-3 and pipeline 25,26,27 connect, the 14th, variable pump/motor regulating mechanism, an end connects fuel tank 46, and the other end is by pipeline 40 and pipeline 32,33 connect, the 15th, the energy storage pressure signal input line, the signal of pressure sensor 13-1 is input to computer control system 49,16th, and the output line of control accumulator loop electromagnetic valve is exported to hydraulic control one-way valve 11 to the control signal of computer control system 49, the 17th, the control signal wire of variable pump/motor regulating mechanism, the control signal of computer control system 49 is exported to variable pump/motor regulating mechanism 14,18th, and quantitative pump/motor delivery pressure signal input line is input to computer control system 49 to the signal of pressure sensor 13-2, the 19th, the output line of control major loop electromagnetic valve, the control signal of computer control system 49 is exported to hydraulic control one-way valve 4,20th, and pressure-energy conversion device axle head tach signal input line inputs to computer control system 49 to the signal of photoelectric encoder 3, the 21st, load pressure signal input line, the signal of pressure sensor 13-3 is input to computer control system 49,22nd, and the car speed signal input line inputs to computer control system 49 to the signal of photoelectric encoder 8, pipeline 23 joint pin plug cylinders 7, pipeline 24,25, pipeline 24 connecting lines 23,25, pipeline 25 connecting lines 23,24, pipeline 26 connects manual lowering valve 5, pressure sensor 13-3, pipeline 25,27, pipeline 27 connects major loop hydraulic control one-way valve 4, pressure sensor 13-3, pipeline 25,27, pipeline 28 connects major loop hydraulic control one-way valve 4, pressure sensor 13-2, pipeline 29, pipeline 29 connects pressure sensor 13-2, quantitative pump/motor 2, pipeline 28, pipeline 30 connects quantitative pump/motor 2, pipeline 31,32, pipeline 31 link variable pump/motors 1, pipeline 30,32, pipeline 32 connecting lines 30,31,33,40, pipeline 33 connecting lines 32,34,35,36,40, pipeline 34 connects complementary energy device 9, pipeline 33,35,36, pipeline 35 connecting lines 33,34,36, pipeline 36 connects accumulator loop hydraulic control one-way valve 11, pipeline 33,34,35, pipeline 37 connects accumulator loop hydraulic control one-way valve 11, energy storage 12, pipeline 48, pipeline 38 connects manual pump 6 and fuel tank 46, pipeline 39 connects manual lowering valve 5 and fuel tank 46, pipeline 40 link variable pump/motor regulating mechanisms 14, pipeline 32,33, pipeline 41 link variable pump/motors 1 and filter 45, pipeline 42 connects filter 45 and fuel tank 46, pipeline 43 connects oil-supplementing system 9 and fuel tank 46, pipeline 44 connects accumulator loop safety valve 10 and fuel tank 46,45th, filter, and an end is connected with variable pump/motor 1 by pipeline 41, the other end is connected with fuel tank 46 by pipeline 42, the 46th, fuel tank, the 47th, the coupler of link variable pump/motor 1 and quantitative pump/motor 2, the 49th, computer control system.
Divide two operating modes of uplink and downlink that the principle of work of this system is described below.
Up operating mode:
Behind the up calling signal in computer control system 49 receives stop or car, the pressure signal of pressure sensor 13-1 and 13-2 is compared, and send control signal 17.Control signal 17 is according to the pressure signal comparative result of control presssure sensor 13-1 and 13-2, and the discharge capacity of regulated variable pump/motor 1 makes hydraulic transformer after hydraulic control electromagnetic switch valve 11 is opened, variable pump/motor 1 and quantitatively pump/motor 2 moment and be zero.Control signal 16 is opened hydraulic control electromagnetic switch valve 11 then, and computer control system 49 changes control signal 17, thereby the discharge capacity of regulated variable pump/motor 1, make quantitative pump/motor 2 output torques greater than variable pump/motor 1 output torque, this moment, quantitatively pump/motor 2 was done " motor ", drove variable pump/motor 1 and did " pump ", and hydraulic transformer just changes, from fuel tank 46 oil suctions, quantitative pump/motor 2 delivery rates.When active pressure reached the load pressure value, hydraulic control one-way valve 4 was open, and hydraulic actuating cylinder begins to quicken upward movement.Quicken in the operational process at elevator, computer control system 49 is according to the actual speed of the lift car feedback of photoelectric encoder 8, compare with the ideal velocity run curve, and according to the tach signal of photoelectric encoder 3, the pressure signal of pressure sensor 13-1,13-2, the discharge capacity of regulated variable pump/motor 1, thus change the variable pump/motor 1 and the quantitative moment of torsion difference of 2 of pump/motors, change the acceleration/accel of elevator, thereby change the rotating speed of voltage transformer; When elevator speed enters at the uniform velocity, computer control system 49 is according to the actual speed of the lift car feedback of photoelectric encoder 8, compare with the ideal velocity run curve, and according to the tach signal of photoelectric encoder 3, the pressure signal of pressure sensor 13-1,13-2, the discharge capacity of regulated variable pump/motor 1 makes the moment of torsion of 2 of variable pump/motor 1 and quantitative pump/motors reach a kind of dynamical equilibrium; When lift car during near stop, begin to enter the decelerating phase, computer control system 49 is adjusted the discharge capacity of variable pump/motor 1, and it is negative making the moment of torsion difference between variable pump/motor 1 and the quantitative pump/motor 2, the hydraulic transformer acceleration/accel is a negative value, thereby makes speed drop be low to moderate the flat bed rotating speed; When elevator speed entered the flat bed section, computer control system 49 regulating control signals 17 were adjusted the discharge capacity of variable pump/motor 1, made variable pump/motor 1, quantitatively the moment of torsion of 2 of pump/motors reaches dynamical equilibrium again, and elevator is with low cruise; Computer control system 49 receives the danger signal that the dry reed switch in the hoistway provides, and just closes electromagnetic switch valve 11, and lift car ends by hydraulic control one-way valve 4, rests in stop.Descending operating mode:
Behind the descending calling signal in computer control system 49 receives stop or car, the pressure signal of pressure sensor 13-1 and 13-2 is compared, and send control signal 17.Control signal 17 is according to the pressure signal comparative result of control presssure sensor 13-1 and 13-2, and the discharge capacity of regulated variable pump/motor 1 makes hydraulic transformer after hydraulic control electromagnetic switch valve 11 is opened, variable pump/motor 1 and quantitatively pump/motor 2 moment and be zero.Control signal 16 is opened hydraulic control electromagnetic switch valve 11 then, and computer control system 49 changes control signal 17, thereby the discharge capacity of regulated variable variable pump/motor 1, make quantitative pump/motor 2 output torques greater than variable pump/motor 1 output torque, this moment, quantitatively pump/motor 2 was done " motor ", drove variable pump/motor 1 and did " pump ", and hydraulic transformer just changes, from fuel tank 46 oil suctions, quantitative pump/motor 2 delivery rates.When active pressure reaches the load pressure value, the control signal 19 that computer control system 49 is sent is opened hydraulic control one-way valve 4, change control signal 17 simultaneously, the discharge capacity of regulated variable pump/motor 1, make quantitative pump/motor 2 output torques less than variable pump/motor 1 output torque, the hydraulic transformer forward is slowed down, and enter reverse acceleration phase.Quicken in the operational process at elevator, computer control system 49 is according to the actual speed of the lift car feedback of photoelectric encoder 8, compare with the ideal velocity run curve, and according to the tach signal of photoelectric encoder 3, the pressure signal of pressure sensor 13-1,13-2, the discharge capacity of regulated variable pump/motor 1, thus change the variable pump/motor 1 and the quantitative moment of torsion difference of 2 of pump/motors, change the acceleration/accel of elevator, thereby change the rotating speed of voltage transformer; When elevator speed enters at the uniform velocity, computer control system 49 is according to the actual speed of the lift car feedback of photoelectric encoder 8, compare with the ideal velocity run curve, and according to the tach signal of photoelectric encoder 3, the pressure signal of pressure sensor 13-1,13-2, the discharge capacity of regulated variable pump/motor 1 makes the moment of torsion of 2 of variable pump/motor 1 and quantitative pump/motors reach a kind of dynamical equilibrium; When lift car during near stop, begin to enter the decelerating phase, computer control system 49 is adjusted the discharge capacity of variable pump/motor 1, and it is negative making the moment of torsion difference between variable pump/motor 1 and the quantitative pump/motor 2, the hydraulic transformer acceleration/accel is a negative value, thereby makes speed drop be low to moderate the flat bed rotating speed; When elevator speed entered the flat bed section, computer control system 49 regulating control signals 17 were adjusted the discharge capacity of variable pump/motor 1, made variable pump/motor 1, quantitatively the moment of torsion of 2 of pump/motors reaches dynamical equilibrium again, and elevator is with low cruise; When computer control system 49 receives the danger signal that the dry reed switch in the hoistway provides, just close electromagnetic switch valve 11, lift car ends by hydraulic control one-way valve 4, rests in stop.
Claims (2)
1. a hydraulic elevator energy-saving control system that adopts hydraulic transformer is characterized in that comprising the hydraulic transformer of being made up of variable pump/motor (1), quantitative pump/motor (2) in the system, and its structure is as follows:
1) end of the variable pump/motor (1) in the hydraulic transformer is through filter (45) connected tank (46), the other end is connected with hydraulic control one-way valve (11) with an end of quantitative pump/motor (30), variable pump/motor regulating mechanism (14), the safety valve (10) of recharging oil device, the slippage pump (9) of system respectively, and hydraulic control one-way valve (11) also is connected with energy storage (12) with first pressure sensor (13.1);
2) the quantitative pump/motor (2) in the hydraulic transformer is by coupler (47) and variable pump/motor (1) mechanical connection, be connected with the photoelectric encoder that tests the speed (3) by another coupler (50), quantitatively pump/motor (2) other end is connected with second pressure sensor (13.2) with an end of major loop hydraulic control one-way valve (4), and the other end of major loop hydraulic control one-way valve (4) is connected with plunger cylinder (7) with the 3rd pressure sensor (13.3);
3) photoelectric encoder that tests the speed (8), hydraulic control one-way valve (11), variable pump/motor regulating mechanism (14), first, second and third pressure sensor (13.1,13.2,13.3) that tests the speed on photoelectric encoder (3), major loop hydraulic control one-way valve (4), the plunger cylinder (7) is electrically connected with computer control system (49) respectively.
2. according to the said a kind of hydraulic elevator energy-saving control system that adopts hydraulic transformer of claim 1, it is characterized in that being connected between major loop hydraulic control one-way valve (4) and the plunger cylinder (7) manual lowering valve (5) and manual pump (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03116048 CN1206147C (en) | 2003-03-26 | 2003-03-26 | Hydraulic lift energy-saving control system with hydraulic transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03116048 CN1206147C (en) | 2003-03-26 | 2003-03-26 | Hydraulic lift energy-saving control system with hydraulic transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1439591A true CN1439591A (en) | 2003-09-03 |
| CN1206147C CN1206147C (en) | 2005-06-15 |
Family
ID=27797080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03116048 Expired - Fee Related CN1206147C (en) | 2003-03-26 | 2003-03-26 | Hydraulic lift energy-saving control system with hydraulic transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1206147C (en) |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427771C (en) * | 2006-12-14 | 2008-10-22 | 浙江大学 | Energy saving hydraulic lifting system of variable hydraulic counterweight |
| CN102606549A (en) * | 2012-03-23 | 2012-07-25 | 三一集团有限公司 | Hydraulic energy-saving system and hydraulic hoisting equipment |
| CN102878151A (en) * | 2012-09-19 | 2013-01-16 | 浙江大学 | Multifunctional test device for high-speed heavy duty hydraulic system |
| CN103016430A (en) * | 2012-12-21 | 2013-04-03 | 哈尔滨工业大学 | Swash plate piston hydraulic transformer controlled by swing hydraulic motor |
| CN103174689A (en) * | 2013-03-29 | 2013-06-26 | 哈尔滨工业大学 | Variable electro-hydraulic servo hydraulic transformer |
| CN103241619A (en) * | 2013-05-22 | 2013-08-14 | 太原理工大学 | Energy saving elevator and operation control method thereof |
| CN103241606A (en) * | 2013-05-22 | 2013-08-14 | 太原理工大学 | Electro-hydraulic hybrid driving mine lifting device and control method thereof |
| CN103562568A (en) * | 2011-05-31 | 2014-02-05 | 沃尔沃建筑设备公司 | A hydraulic system and a method for controlling a hydraulic system |
| CN104370228A (en) * | 2014-11-12 | 2015-02-25 | 中国石油天然气股份有限公司 | Winch and oil pumping unit |
| CN105041786A (en) * | 2015-08-14 | 2015-11-11 | 南京工程学院 | Hydraulic vibration excitation device of variable-rigidity mechanism based on hydraulic transformer and energy accumulators |
| CN105128662A (en) * | 2015-07-31 | 2015-12-09 | 燕山大学 | Hydraulic bridge crane generator energy-saving power generation system |
| CN106144855A (en) * | 2016-08-19 | 2016-11-23 | 湖南电气职业技术学院 | The method and apparatus that a kind of tractive driving apparatus of load balance and energy regenerating utilize |
| CN106958546A (en) * | 2017-04-17 | 2017-07-18 | 燕山大学 | Numeric type hydraulic transformer |
| CN107140514A (en) * | 2017-06-29 | 2017-09-08 | 广东工业大学 | A kind of energy-saving hydraulic staircase |
| CN107738970A (en) * | 2016-11-25 | 2018-02-27 | 重庆键英液压机电有限公司 | Lowering or hoisting gear based on multistage hydraulic cylinder |
| CN107738967A (en) * | 2016-11-25 | 2018-02-27 | 重庆键英液压机电有限公司 | Lowering or hoisting gear and its control method based on multistage hydraulic cylinder |
| CN107738968A (en) * | 2016-11-25 | 2018-02-27 | 重庆键英液压机电有限公司 | The Hydraulic Power Transmission System of hydraulic elevator |
| CN107738969A (en) * | 2016-11-25 | 2018-02-27 | 重庆键英液压机电有限公司 | Hydraulic Power Transmission System based on multistage hydraulic cylinder |
| CN108792890A (en) * | 2018-06-27 | 2018-11-13 | 江苏大学 | A kind of hydraulic transformer formula hydraulic elevator synchronization loop |
| CN109110587A (en) * | 2017-06-26 | 2019-01-01 | 奥的斯电梯公司 | Hydraulic elevator system based on the control of the valve of position or speed |
| CN111396378A (en) * | 2020-04-09 | 2020-07-10 | 大连理工大学 | Motor-driven hydraulic system for crane luffing mechanism and method of operation thereof |
| CN113915178A (en) * | 2021-10-08 | 2022-01-11 | 山东大学 | Full-sea deep pump valve double-control-mode electro-hydraulic actuating unit |
-
2003
- 2003-03-26 CN CN 03116048 patent/CN1206147C/en not_active Expired - Fee Related
Cited By (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427771C (en) * | 2006-12-14 | 2008-10-22 | 浙江大学 | Energy saving hydraulic lifting system of variable hydraulic counterweight |
| CN103562568B (en) * | 2011-05-31 | 2016-10-05 | 沃尔沃建筑设备公司 | Hydraulic system and for controlling the method for hydraulic system |
| CN103562568A (en) * | 2011-05-31 | 2014-02-05 | 沃尔沃建筑设备公司 | A hydraulic system and a method for controlling a hydraulic system |
| CN102606549A (en) * | 2012-03-23 | 2012-07-25 | 三一集团有限公司 | Hydraulic energy-saving system and hydraulic hoisting equipment |
| CN102606549B (en) * | 2012-03-23 | 2014-09-10 | 三一集团有限公司 | Hydraulic energy-saving system and hydraulic hoisting equipment |
| CN102878151A (en) * | 2012-09-19 | 2013-01-16 | 浙江大学 | Multifunctional test device for high-speed heavy duty hydraulic system |
| CN103016430A (en) * | 2012-12-21 | 2013-04-03 | 哈尔滨工业大学 | Swash plate piston hydraulic transformer controlled by swing hydraulic motor |
| CN103174689B (en) * | 2013-03-29 | 2015-06-24 | 哈尔滨工业大学 | Variable electro-hydraulic servo hydraulic transformer |
| CN103174689A (en) * | 2013-03-29 | 2013-06-26 | 哈尔滨工业大学 | Variable electro-hydraulic servo hydraulic transformer |
| CN103241606A (en) * | 2013-05-22 | 2013-08-14 | 太原理工大学 | Electro-hydraulic hybrid driving mine lifting device and control method thereof |
| CN103241606B (en) * | 2013-05-22 | 2014-11-05 | 太原理工大学 | Electro-hydraulic hybrid driving mine lifting device and control method thereof |
| CN103241619A (en) * | 2013-05-22 | 2013-08-14 | 太原理工大学 | Energy saving elevator and operation control method thereof |
| CN104370228A (en) * | 2014-11-12 | 2015-02-25 | 中国石油天然气股份有限公司 | Winch and oil pumping unit |
| CN105128662B (en) * | 2015-07-31 | 2018-01-23 | 燕山大学 | Hydraulic driving electric generator energy-conserving electricity generation system |
| CN105128662A (en) * | 2015-07-31 | 2015-12-09 | 燕山大学 | Hydraulic bridge crane generator energy-saving power generation system |
| CN105041786B (en) * | 2015-08-14 | 2017-06-20 | 南京工程学院 | A kind of hydraulic exciting device based on hydraulic transformer, accumulator variation rigidity mechanism |
| CN105041786A (en) * | 2015-08-14 | 2015-11-11 | 南京工程学院 | Hydraulic vibration excitation device of variable-rigidity mechanism based on hydraulic transformer and energy accumulators |
| CN106144855B (en) * | 2016-08-19 | 2018-10-23 | 湖南电气职业技术学院 | The method and apparatus that a kind of tractive driving apparatus of load balance and energy regenerating utilize |
| CN106144855A (en) * | 2016-08-19 | 2016-11-23 | 湖南电气职业技术学院 | The method and apparatus that a kind of tractive driving apparatus of load balance and energy regenerating utilize |
| CN107738969A (en) * | 2016-11-25 | 2018-02-27 | 重庆键英液压机电有限公司 | Hydraulic Power Transmission System based on multistage hydraulic cylinder |
| CN107738970A (en) * | 2016-11-25 | 2018-02-27 | 重庆键英液压机电有限公司 | Lowering or hoisting gear based on multistage hydraulic cylinder |
| CN107738967A (en) * | 2016-11-25 | 2018-02-27 | 重庆键英液压机电有限公司 | Lowering or hoisting gear and its control method based on multistage hydraulic cylinder |
| CN107738968A (en) * | 2016-11-25 | 2018-02-27 | 重庆键英液压机电有限公司 | The Hydraulic Power Transmission System of hydraulic elevator |
| CN106958546B (en) * | 2017-04-17 | 2018-04-06 | 燕山大学 | Numeric type hydraulic transformer |
| CN106958546A (en) * | 2017-04-17 | 2017-07-18 | 燕山大学 | Numeric type hydraulic transformer |
| CN109110587A (en) * | 2017-06-26 | 2019-01-01 | 奥的斯电梯公司 | Hydraulic elevator system based on the control of the valve of position or speed |
| CN109110587B (en) * | 2017-06-26 | 2023-07-18 | 奥的斯电梯公司 | Valve controlled hydraulic elevator system based on position or speed |
| CN107140514A (en) * | 2017-06-29 | 2017-09-08 | 广东工业大学 | A kind of energy-saving hydraulic staircase |
| CN108792890A (en) * | 2018-06-27 | 2018-11-13 | 江苏大学 | A kind of hydraulic transformer formula hydraulic elevator synchronization loop |
| CN111396378A (en) * | 2020-04-09 | 2020-07-10 | 大连理工大学 | Motor-driven hydraulic system for crane luffing mechanism and method of operation thereof |
| CN111396378B (en) * | 2020-04-09 | 2021-03-26 | 大连理工大学 | Motor-driven hydraulic system for crane luffing mechanism and method of operation thereof |
| CN113915178A (en) * | 2021-10-08 | 2022-01-11 | 山东大学 | Full-sea deep pump valve double-control-mode electro-hydraulic actuating unit |
| CN113915178B (en) * | 2021-10-08 | 2022-05-31 | 山东大学 | Full-sea deep pump valve double-control-mode electro-hydraulic actuating unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1206147C (en) | 2005-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1206147C (en) | Hydraulic lift energy-saving control system with hydraulic transformer | |
| CN100427771C (en) | Energy saving hydraulic lifting system of variable hydraulic counterweight | |
| CN102587444B (en) | Oil hybrid system for excavator with energy differential recovery | |
| CN201363332Y (en) | Large inertia variable frequency volume bypass throttling speed governing system | |
| CN101704337B (en) | Parallel-connection type hydraulic-electro hybrid power driving system | |
| CN206346966U (en) | A kind of Direct Drive Electro-hydraulic Servo System applied to asymmetric servo cylinder press | |
| CN107444847A (en) | The long belt conveyor of combination drive | |
| CN202644609U (en) | Full hydraulic bulldozer traveling driving hydraulic device | |
| CN1215962C (en) | Frequency-varying driving elevator hydraulic control system | |
| CN107482840B (en) | Action potential storage and transportation circuit and motor compound drive system and its control method | |
| CN201071519Y (en) | Output torque equalization control device of prime motor | |
| CN107972654A (en) | A kind of braking method and road roller | |
| CN111219369A (en) | Closed hydraulic circuit double-hydraulic-cylinder actuator system | |
| CN201705248U (en) | Continuous pipe injection head control device | |
| CN210949311U (en) | Real-time recovery and utilization system for winch potential energy | |
| CN107906060A (en) | Vehicle parallel type hydraulic hybrid power system and its method with energy regenerating release function | |
| CN207018464U (en) | A kind of machine liquid composite transmission based on Stress control | |
| CN201729582U (en) | Closed hydraulic oil way of hoister | |
| CN101391613B (en) | Hydraulic control system for stepless brake retarder | |
| CN201116558Y (en) | Prime motor output torque balance control device | |
| CN2858744Y (en) | Poleless speed regulation driving device for whole course of milling machine | |
| CN102602852B (en) | Hydraulic hybrid stacking machine | |
| CN109080613A (en) | A kind of hydraulic regenerative braking device, braking method and system | |
| CN212313284U (en) | Wheel hub drive hydraulic hybrid vehicle configuration system | |
| CN1600672A (en) | Speed adjustable cable hoist driven through pressure-fluid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050615 Termination date: 20140326 |