CN101435451B - Movable arm potential energy recovery method and apparatus of hydraulic excavator - Google Patents

Movable arm potential energy recovery method and apparatus of hydraulic excavator Download PDF

Info

Publication number
CN101435451B
CN101435451B CN2008101438747A CN200810143874A CN101435451B CN 101435451 B CN101435451 B CN 101435451B CN 2008101438747 A CN2008101438747 A CN 2008101438747A CN 200810143874 A CN200810143874 A CN 200810143874A CN 101435451 B CN101435451 B CN 101435451B
Authority
CN
China
Prior art keywords
solenoid valve
generator
energy
accumulator
potential energy
Prior art date
Application number
CN2008101438747A
Other languages
Chinese (zh)
Other versions
CN101435451A (en
Inventor
黄中华
刘少军
Original Assignee
中南大学
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 中南大学 filed Critical 中南大学
Priority to CN2008101438747A priority Critical patent/CN101435451B/en
Publication of CN101435451A publication Critical patent/CN101435451A/en
Application granted granted Critical
Publication of CN101435451B publication Critical patent/CN101435451B/en

Links

Abstract

The invention discloses a method for recovering potential energy of a movable arm of a hydraulic digging machine and a device thereof. The method comprises the following steps: firstly, the potential energy is stored through an energy accumulator in the retraction process of a hydraulic cylinder; and secondly the stored energy in the energy accumulator drives a generator to generate electricity, thereby realizing the recovery of the potential energy of the movable arm of the hydraulic digging machine. A mode for storing the potential energy is to convert the potential energy into pressure energy. The energy accumulator and the generator are connected through a proportioning valve so as to control the rotational speed of the generator. The method realizes high-efficiency recovery of the potential energy of the movable arm of the hydraulic digging machine; the principle of the method is to skillfully change the working time of hydraulic oil for power generation through the function of energy storage of the energy accumulator and provide effective buffering for recovering the potential energy; in addition, through the throttling control of the proportioning valve, the method reduces pressure fluctuation of the hydraulic oil in the power generation process, realizes the adjustment of the working rotational speed of the generator, improves the working efficiency of the generator and further improves the efficiency of energy recovery.

Description

A kind of Hydraulic Excavator's Boom potential energy recovery method and device

Technical field

The invention belongs to electromechanical integration technology area, relate to a kind of Hydraulic Excavator's Boom potential energy recovery method and device.

Background technique

Hydraulic shovel is a kind of typical periodic job equipment, and the decline of swing arm is the typical link of its operation cycle.When Hydraulic Excavator's Boom descended, common hydraulic shovel was the rate of descent of regulating working arm through the aperture of control valve, realized stopping of swing arm descending motion through closed control valve.Common hydraulic shovel does not have energy recycle device usually, and swing arm is transferred the most of consumption of the potential energy that discharges in the process on control valve, has caused the waste of energy.

Hybrid power hydraulic excavator is owing to be equipped with storage battery and generator, can be recycled into electric energy to the potential energy in the Hydraulic Excavator's Boom decline process in theory and is stored in the storage battery, is used further to the drive motor acting in due course.Existing oil electric mixed dynamic Hydraulic Excavator's Boom potential energy recovery method is employed in serial connection oil hydraulic motor and generator on the swing arm oil hydraulic cylinder oil circuit mostly, is recycled into electric energy to the potential energy of swing arm through hydraulic motor-driving generator.Because the time that can carry out energy recovery in the Hydraulic Excavator's Boom decline process is usually less than 2 seconds, and the pressure surge of hydraulic oil is big in the callback course, it is very low to cause generator to be operated in the efficient of inefficient district, energy recovery.

Summary of the invention

Technical problem to be solved by this invention provides a kind of Hydraulic Excavator's Boom potential energy recovery method and device, to improve the reuse efficiency of Hydraulic Excavator's Boom potential energy.

Technical solution of the present invention is following:

A kind of Hydraulic Excavator's Boom potential energy recovery method is characterized in that, stores the potential energy in the oil hydraulic cylinder retraction process through accumulator earlier, again the energy storage in the accumulator is driven generator for electricity generation, realizes the recovery of Hydraulic Excavator's Boom potential energy.

The mode of said storage of potential energy is that potential energy converting and energy is become the pressure ability.

The passing ratio valve connects the rotating speed with the control generator between described accumulator and the generator.

A kind of Hydraulic Excavator's Boom potential energy recovering device is characterized in that, comprises oil hydraulic cylinder, fuel tank, accumulator, motor, generator and energy storage device; One end of described oil hydraulic cylinder is connected with fuel tank through first solenoid valve; The other end is connected with fuel tank through second solenoid valve; The rear end of described oil hydraulic cylinder is connected through the 3rd solenoid valve with accumulator; Described accumulator is connected with generator through the 4th solenoid valve, motor; Described generator is electrically connected with energy storage device.

Described Hydraulic Excavator's Boom potential energy recovering device also comprises controller, and described controller is connected with first solenoid valve, second solenoid valve, the 3rd solenoid valve and the control end of the 4th solenoid valve.

Described first solenoid valve, second solenoid valve and the 3rd solenoid valve are two-position two-way solenoid valve.

Described the 4th solenoid valve is the bi-bit bi-pass Proportional valve.

Described generator is connected with energy storage device through inverter.

Beneficial effect:

The present invention has realized the high efficiente callback of Hydraulic Excavator's Boom potential energy; Its principle is that the energy storage effect through accumulator has changed the operating time that hydraulic oil is used to generate electricity dexterously, efficient buffer is provided for the recovery of potential energy, in addition; The throttling control of passing ratio valve has reduced the pressure surge of hydraulic oil in the power generation process; Realize the adjusting of generator working speed, improved the working efficiency of generator, and then improved the efficient of energy recovery.

Convert the potential energy in the oil hydraulic cylinder retraction process to the pressure ability earlier through accumulator, through the control of controller, be used to drive generator for electricity generation to the pressure oil in the accumulator then.Because the energy storage effect of accumulator, the deficiency when having avoided existing energy recovery can only occur in the oil hydraulic cylinder withdrawal has effectively prolonged the time of energy recovery.

Through the aperture of controller adjustment bi-bit bi-pass Proportional valve, the pressure reduction when keeping hydraulic oil to flow through generator remains unchanged basically, realizes the adjusting of generator working speed, guarantees that generator is operated in high efficient area.Overcome the low shortcoming of original potential energy recovering device potential energy reuse efficiency thus.

Description of drawings

Fig. 1 is a Hydraulic Excavator's Boom potential energy energy recycle device schematic representation.

Embodiment

Following instance is to further specify of the present invention, rather than the restriction scope of invention.

Embodiment 1:

As shown in Figure 1; Oil electric mixed dynamic Hydraulic Excavator's Boom potential energy recovering device; Comprise oil hydraulic cylinder 3, controller 1, accumulator 2, two-position two-way solenoid valve 4,5 and 7, bi-bit bi-pass Proportional valve 6 (wherein two-position two-way solenoid valve 4,7 and 5 and first solenoid valve, second solenoid valve, the 3rd solenoid valve and the 4th solenoid valve of bi-bit bi-pass Proportional valve 6 respectively corresponding summary of the invention parts), generator 9, oil hydraulic motor 10, inverter 11, accumulator 12 and fuel tank 8; Two-position two-way solenoid valve 4,5 and 7 is normally closed solenoid valve; Bi-bit bi-pass Proportional valve 6 is normally closed Proportional valve; Two-position two-way solenoid valve 4 is installed between oil hydraulic cylinder 3 rod chamber hydraulic fluid ports and the fuel tank 8; Two-position two-way solenoid valve 7 is installed between oil hydraulic cylinder 3 rodless cavity hydraulic fluid ports and the fuel tank 8, and two-position two-way solenoid valve 5 one ends link to each other with the hydraulic fluid port of oil hydraulic cylinder 3 rodless cavities, and the other end links to each other with bi-bit bi-pass Proportional valve 6.Accumulator 2 is installed between two-position two-way solenoid valve 5 and the bi-bit bi-pass Proportional valve 6.Oil hydraulic motor 10, generator 9, inverter 11 and accumulator 12 have been connected in series after the bi-bit bi-pass Proportional valve 6 successively.The output of controller 2 links to each other with two-position two-way solenoid valve 4,5,7, bi-bit bi-pass Proportional valve 6 and generator 9 respectively.Need to prove in addition: what label among Fig. 18 was corresponding is same fuel tank, is drawn as the standard that a plurality of just industries are drawn.

The working procedure of this device is following: when the piston rod of oil hydraulic cylinder 3 is withdrawn; If need not carry out energy recovery; Then open two-position two-way solenoid valve 4,7; Close two-position two-way solenoid valve 5 and bi-bit bi-pass Proportional valve 6, the hydraulic oil in the fuel tank 8 is through the rod chamber of two-position two-way solenoid valve 4 entering oil hydraulic cylinders 3, and the hydraulic oil in oil hydraulic cylinder 3 rodless cavities is through two-position two-way solenoid valve 7 oil sump tanks; Carry out energy recovery if desired; Then close two-position two-way solenoid valve 7 and bi-bit bi-pass Proportional valve 6 earlier; Connect two-position two-way solenoid valve 4,5 again; Hydraulic oil in the fuel tank 8 is through the rod chamber of two-position two-way solenoid valve 4 entering oil hydraulic cylinders 3, and the hydraulic oil in oil hydraulic cylinder 3 rodless cavities is filled in the accumulator 2.When needs carry out energy recovery; Controller 1 is closed two-position two-way solenoid valve 5,7; Connect two-position two-way solenoid valve 4 and bi-bit bi-pass Proportional valve 6; Pressure oil in the accumulator 2 flows into oil hydraulic motor 10, drives generator 9 generatings, and the electric energy that generator 9 produces is stored in the accumulator 12 through inverter 11.

Convert the potential energy in oil hydraulic cylinder 3 retraction process to the pressure ability earlier through accumulator 2, through the control of controller 1, be used to drive generator 9 generatings to the pressure oil in the accumulator 2 then.Because the energy storage effect of accumulator 2, the deficiency when having avoided existing energy recovery can only occur in oil hydraulic cylinder 3 withdrawals has effectively prolonged the time of energy recovery.

Aperture through controller 1 adjustment bi-bit bi-pass Proportional valve 6; Pressure reduction when keeping hydraulic oil to flow through generator 9 remains unchanged basically; Realize electric energy that generator 9 outputs are stable and the adjusting that realizes motor 9 working speeds, guarantee that generator 9 is operated in high efficient area.

Claims (2)

1. a Hydraulic Excavator's Boom potential energy recovery method is characterized in that, stores the potential energy in the oil hydraulic cylinder retraction process through accumulator earlier, again the energy storage in the accumulator is driven generator for electricity generation, realizes the recovery of Hydraulic Excavator's Boom potential energy;
The mode of said storage of potential energy is that potential energy converting and energy is become the pressure ability;
The passing ratio valve connects the rotating speed with the control generator between described accumulator and the generator;
Described Hydraulic Excavator's Boom potential energy recovery method is based on Hydraulic Excavator's Boom potential energy recovering device, and described Hydraulic Excavator's Boom potential energy recovering device comprises oil hydraulic cylinder, fuel tank, accumulator, motor, generator and energy storage device; The rod chamber of described oil hydraulic cylinder is connected with fuel tank through first solenoid valve; Rodless cavity is connected with fuel tank through second solenoid valve; The rodless cavity of described oil hydraulic cylinder is connected through the 3rd solenoid valve with accumulator; Described accumulator is connected with generator through bi-bit bi-pass Proportional valve, motor; Described generator is electrically connected with energy storage device;
Described controller is connected with first solenoid valve, second solenoid valve, the 3rd solenoid valve and the control end of bi-bit bi-pass Proportional valve;
Described first solenoid valve, second solenoid valve and the 3rd solenoid valve are two-position two-way solenoid valve;
Described generator is connected with energy storage device through inverter;
Concrete controlling method is:
When the piston rod of oil hydraulic cylinder is withdrawn; If need not carry out energy recovery; Then open first solenoid valve and second solenoid valve; Close the 3rd solenoid valve and bi-bit bi-pass Proportional valve, the hydraulic oil in the fuel tank is through the rod chamber of first solenoid valve entering oil hydraulic cylinder, and the hydraulic oil in the oil hydraulic cylinder rodless cavity is through the second solenoid valve oil sump tank; Carry out energy recovery if desired; Then close second solenoid valve and bi-bit bi-pass Proportional valve earlier; Connect first solenoid valve and the 3rd solenoid valve again, the hydraulic oil in the fuel tank gets into oil hydraulic cylinder (3) rod chamber through first solenoid valve, and the hydraulic oil in the oil hydraulic cylinder rodless cavity is filled in the accumulator;
Through the aperture of controller adjustment bi-bit bi-pass Proportional valve, the pressure reduction when keeping hydraulic oil to flow through generator remains unchanged, and realizes electric energy that generator output is stable and the adjusting that realizes the engine operation rotating speed.
2. a Hydraulic Excavator's Boom potential energy recovering device is characterized in that, comprises oil hydraulic cylinder, fuel tank, accumulator, motor, generator and energy storage device; The rod chamber of described oil hydraulic cylinder is connected with fuel tank through first solenoid valve; Rodless cavity is connected with fuel tank through second solenoid valve; The rodless cavity of described oil hydraulic cylinder is connected through the 3rd solenoid valve with accumulator; Described accumulator is connected with generator through bi-bit bi-pass Proportional valve, motor; Described generator is electrically connected with energy storage device;
Described controller is connected with first solenoid valve, second solenoid valve, the 3rd solenoid valve and the control end of bi-bit bi-pass Proportional valve;
Described first solenoid valve, second solenoid valve and the 3rd solenoid valve are two-position two-way solenoid valve;
Described generator is connected with energy storage device through inverter.
CN2008101438747A 2008-12-09 2008-12-09 Movable arm potential energy recovery method and apparatus of hydraulic excavator CN101435451B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2008101438747A CN101435451B (en) 2008-12-09 2008-12-09 Movable arm potential energy recovery method and apparatus of hydraulic excavator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2008101438747A CN101435451B (en) 2008-12-09 2008-12-09 Movable arm potential energy recovery method and apparatus of hydraulic excavator

Publications (2)

Publication Number Publication Date
CN101435451A CN101435451A (en) 2009-05-20
CN101435451B true CN101435451B (en) 2012-03-28

Family

ID=40710035

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2008101438747A CN101435451B (en) 2008-12-09 2008-12-09 Movable arm potential energy recovery method and apparatus of hydraulic excavator

Country Status (1)

Country Link
CN (1) CN101435451B (en)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7900444B1 (en) 2008-04-09 2011-03-08 Sustainx, Inc. Systems and methods for energy storage and recovery using compressed gas
US7958731B2 (en) 2009-01-20 2011-06-14 Sustainx, Inc. Systems and methods for combined thermal and compressed gas energy conversion systems
US7963110B2 (en) 2009-03-12 2011-06-21 Sustainx, Inc. Systems and methods for improving drivetrain efficiency for compressed gas energy storage
US8037678B2 (en) 2009-09-11 2011-10-18 Sustainx, Inc. Energy storage and generation systems and methods using coupled cylinder assemblies
US8046990B2 (en) 2009-06-04 2011-11-01 Sustainx, Inc. Systems and methods for improving drivetrain efficiency for compressed gas energy storage and recovery systems
US8104274B2 (en) 2009-06-04 2012-01-31 Sustainx, Inc. Increased power in compressed-gas energy storage and recovery
US8117842B2 (en) 2009-11-03 2012-02-21 Sustainx, Inc. Systems and methods for compressed-gas energy storage using coupled cylinder assemblies
US8171728B2 (en) 2010-04-08 2012-05-08 Sustainx, Inc. High-efficiency liquid heat exchange in compressed-gas energy storage systems
US8191362B2 (en) 2010-04-08 2012-06-05 Sustainx, Inc. Systems and methods for reducing dead volume in compressed-gas energy storage systems
US8225606B2 (en) 2008-04-09 2012-07-24 Sustainx, Inc. Systems and methods for energy storage and recovery using rapid isothermal gas expansion and compression
US8234863B2 (en) 2010-05-14 2012-08-07 Sustainx, Inc. Forming liquid sprays in compressed-gas energy storage systems for effective heat exchange
US8240140B2 (en) 2008-04-09 2012-08-14 Sustainx, Inc. High-efficiency energy-conversion based on fluid expansion and compression
US8240146B1 (en) 2008-06-09 2012-08-14 Sustainx, Inc. System and method for rapid isothermal gas expansion and compression for energy storage
US8250863B2 (en) 2008-04-09 2012-08-28 Sustainx, Inc. Heat exchange with compressed gas in energy-storage systems
US8448433B2 (en) 2008-04-09 2013-05-28 Sustainx, Inc. Systems and methods for energy storage and recovery using gas expansion and compression
US8474255B2 (en) 2008-04-09 2013-07-02 Sustainx, Inc. Forming liquid sprays in compressed-gas energy storage systems for effective heat exchange
US8479505B2 (en) 2008-04-09 2013-07-09 Sustainx, Inc. Systems and methods for reducing dead volume in compressed-gas energy storage systems
US8495872B2 (en) 2010-08-20 2013-07-30 Sustainx, Inc. Energy storage and recovery utilizing low-pressure thermal conditioning for heat exchange with high-pressure gas
US8539763B2 (en) 2011-05-17 2013-09-24 Sustainx, Inc. Systems and methods for efficient two-phase heat transfer in compressed-air energy storage systems
US8578708B2 (en) 2010-11-30 2013-11-12 Sustainx, Inc. Fluid-flow control in energy storage and recovery systems
US8667792B2 (en) 2011-10-14 2014-03-11 Sustainx, Inc. Dead-volume management in compressed-gas energy storage and recovery systems
US8677744B2 (en) 2008-04-09 2014-03-25 SustaioX, Inc. Fluid circulation in energy storage and recovery systems
US8733095B2 (en) 2008-04-09 2014-05-27 Sustainx, Inc. Systems and methods for efficient pumping of high-pressure fluids for energy
RU2709270C1 (en) * 2018-08-01 2019-12-17 Федеральное государственное бюджетное образовательное учреждение высшего образования "Псковский государственный университет" Single-bucket excavator

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5143858B2 (en) * 2010-04-20 2013-02-13 住友重機械工業株式会社 Construction machinery
CN101846121A (en) * 2010-06-01 2010-09-29 湖南山河智能机械股份有限公司 Energy recovering system of hydraulic executing mechanism
CN101956405A (en) * 2010-07-15 2011-01-26 吉林大学 Gravitational potential energy recovery device during descending of engineering machinery movable arm
DE102010051650A1 (en) * 2010-11-17 2012-05-24 Liebherr-Hydraulikbagger Gmbh Implement
DE102010051651A1 (en) * 2010-11-17 2012-05-24 Liebherr-Hydraulikbagger Gmbh implement
WO2012105345A1 (en) * 2011-02-03 2012-08-09 日立建機株式会社 Power regeneration device for work machine
CN102071718B (en) * 2011-03-01 2012-11-14 山河智能装备股份有限公司 System for recovering energy of excavator
WO2012126266A1 (en) 2011-03-21 2012-09-27 Yang Shuanglai Lifting system and lifting method for jib of project machine and project machine thereof
CN102691682A (en) * 2011-03-21 2012-09-26 杨双来 Method and device for potential energy recovery and storage by utilizing deadweight of crane jib
CN102678690B (en) * 2012-05-22 2015-05-20 山河智能装备股份有限公司 Potential energy recycling hydraulic system of working device
CN102826000B (en) * 2012-08-17 2016-04-06 湖南三一港口设备有限公司 Vehicle hybrid system and container stacking machine
CN104047932B (en) * 2013-03-15 2016-03-30 宝钢工业炉工程技术有限公司 The potential energy recovery system of jacking equipment under Vnsteady loads and using method thereof
CN104047934B (en) * 2013-03-15 2016-03-30 宝钢工业炉工程技术有限公司 The potential energy recovery system of jacking equipment and the matching process when load consecutive variations
CN104047935B (en) * 2013-03-15 2016-03-30 宝钢工业炉工程技术有限公司 The potential energy recovery system of jacking equipment under steady load and using method thereof
CN103452149B (en) * 2013-08-26 2015-07-15 中外合资沃得重工(中国)有限公司 Potential energy recovery hydraulic control device for movable arm of excavator
CN103671295B (en) * 2013-12-17 2016-03-16 四川百世昌重型机械有限公司 A kind of enclosed energy storage hydraulic system
CN104005440A (en) * 2014-06-06 2014-08-27 山东中川液压有限公司 Potential energy recovering control device of hydraulic excavator boom
KR20170066074A (en) * 2015-12-04 2017-06-14 두산인프라코어 주식회사 Hydraulic control apparatus and hydraulic control method for construction machine
CN106939907A (en) * 2016-05-12 2017-07-11 华若延 A kind of energy-recuperation system for building machinery
JP6636977B2 (en) * 2017-03-14 2020-01-29 日立建機株式会社 Hydraulic drive for work machines
CN107420384B (en) * 2017-09-15 2019-04-30 太原理工大学 System is used in the storage of lifting device gravitional force P-V
CN109253120A (en) * 2018-10-17 2019-01-22 太原理工大学 Combination cylinder energy conservation hoisting system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001027206A (en) * 1999-07-13 2001-01-30 Shin Caterpillar Mitsubishi Ltd Control device for hydraulic actuator
CN1958972A (en) * 2005-11-01 2007-05-09 李恒辉 Method for retrieving reciprocating potential energy of working machines and tools
CN1993524A (en) * 2005-06-02 2007-07-04 新履带牵引车三菱有限公司 Working machine
CN101012802A (en) * 2006-12-21 2007-08-08 中国科学院广州能源研究所 Hydraulic cylinder down-suspension floater wave energy generating system
CN201339206Y (en) * 2008-12-09 2009-11-04 中南大学 Movable arm potential energy recovery device of hybrid power hydraulic pressure excavating machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001027206A (en) * 1999-07-13 2001-01-30 Shin Caterpillar Mitsubishi Ltd Control device for hydraulic actuator
CN1993524A (en) * 2005-06-02 2007-07-04 新履带牵引车三菱有限公司 Working machine
CN1958972A (en) * 2005-11-01 2007-05-09 李恒辉 Method for retrieving reciprocating potential energy of working machines and tools
CN101012802A (en) * 2006-12-21 2007-08-08 中国科学院广州能源研究所 Hydraulic cylinder down-suspension floater wave energy generating system
CN201339206Y (en) * 2008-12-09 2009-11-04 中南大学 Movable arm potential energy recovery device of hybrid power hydraulic pressure excavating machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
候波 等.升降式工作台势能回收液压系统研究.《矿山机械》.2007,第35卷(第3期),49-51. *

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8240140B2 (en) 2008-04-09 2012-08-14 Sustainx, Inc. High-efficiency energy-conversion based on fluid expansion and compression
US8763390B2 (en) 2008-04-09 2014-07-01 Sustainx, Inc. Heat exchange with compressed gas in energy-storage systems
US8733094B2 (en) 2008-04-09 2014-05-27 Sustainx, Inc. Systems and methods for energy storage and recovery using rapid isothermal gas expansion and compression
US8733095B2 (en) 2008-04-09 2014-05-27 Sustainx, Inc. Systems and methods for efficient pumping of high-pressure fluids for energy
US8713929B2 (en) 2008-04-09 2014-05-06 Sustainx, Inc. Systems and methods for energy storage and recovery using compressed gas
US8677744B2 (en) 2008-04-09 2014-03-25 SustaioX, Inc. Fluid circulation in energy storage and recovery systems
US8627658B2 (en) 2008-04-09 2014-01-14 Sustainx, Inc. Systems and methods for energy storage and recovery using rapid isothermal gas expansion and compression
US8479505B2 (en) 2008-04-09 2013-07-09 Sustainx, Inc. Systems and methods for reducing dead volume in compressed-gas energy storage systems
US8474255B2 (en) 2008-04-09 2013-07-02 Sustainx, Inc. Forming liquid sprays in compressed-gas energy storage systems for effective heat exchange
US8448433B2 (en) 2008-04-09 2013-05-28 Sustainx, Inc. Systems and methods for energy storage and recovery using gas expansion and compression
US8250863B2 (en) 2008-04-09 2012-08-28 Sustainx, Inc. Heat exchange with compressed gas in energy-storage systems
US8209974B2 (en) 2008-04-09 2012-07-03 Sustainx, Inc. Systems and methods for energy storage and recovery using compressed gas
US8225606B2 (en) 2008-04-09 2012-07-24 Sustainx, Inc. Systems and methods for energy storage and recovery using rapid isothermal gas expansion and compression
US7900444B1 (en) 2008-04-09 2011-03-08 Sustainx, Inc. Systems and methods for energy storage and recovery using compressed gas
US8240146B1 (en) 2008-06-09 2012-08-14 Sustainx, Inc. System and method for rapid isothermal gas expansion and compression for energy storage
US8234862B2 (en) 2009-01-20 2012-08-07 Sustainx, Inc. Systems and methods for combined thermal and compressed gas energy conversion systems
US8122718B2 (en) 2009-01-20 2012-02-28 Sustainx, Inc. Systems and methods for combined thermal and compressed gas energy conversion systems
US7958731B2 (en) 2009-01-20 2011-06-14 Sustainx, Inc. Systems and methods for combined thermal and compressed gas energy conversion systems
US7963110B2 (en) 2009-03-12 2011-06-21 Sustainx, Inc. Systems and methods for improving drivetrain efficiency for compressed gas energy storage
US8046990B2 (en) 2009-06-04 2011-11-01 Sustainx, Inc. Systems and methods for improving drivetrain efficiency for compressed gas energy storage and recovery systems
US8479502B2 (en) 2009-06-04 2013-07-09 Sustainx, Inc. Increased power in compressed-gas energy storage and recovery
US8104274B2 (en) 2009-06-04 2012-01-31 Sustainx, Inc. Increased power in compressed-gas energy storage and recovery
US8109085B2 (en) 2009-09-11 2012-02-07 Sustainx, Inc. Energy storage and generation systems and methods using coupled cylinder assemblies
US8468815B2 (en) 2009-09-11 2013-06-25 Sustainx, Inc. Energy storage and generation systems and methods using coupled cylinder assemblies
US8037678B2 (en) 2009-09-11 2011-10-18 Sustainx, Inc. Energy storage and generation systems and methods using coupled cylinder assemblies
US8117842B2 (en) 2009-11-03 2012-02-21 Sustainx, Inc. Systems and methods for compressed-gas energy storage using coupled cylinder assemblies
US8171728B2 (en) 2010-04-08 2012-05-08 Sustainx, Inc. High-efficiency liquid heat exchange in compressed-gas energy storage systems
US8661808B2 (en) 2010-04-08 2014-03-04 Sustainx, Inc. High-efficiency heat exchange in compressed-gas energy storage systems
US8191362B2 (en) 2010-04-08 2012-06-05 Sustainx, Inc. Systems and methods for reducing dead volume in compressed-gas energy storage systems
US8245508B2 (en) 2010-04-08 2012-08-21 Sustainx, Inc. Improving efficiency of liquid heat exchange in compressed-gas energy storage systems
US8234863B2 (en) 2010-05-14 2012-08-07 Sustainx, Inc. Forming liquid sprays in compressed-gas energy storage systems for effective heat exchange
US8495872B2 (en) 2010-08-20 2013-07-30 Sustainx, Inc. Energy storage and recovery utilizing low-pressure thermal conditioning for heat exchange with high-pressure gas
US8578708B2 (en) 2010-11-30 2013-11-12 Sustainx, Inc. Fluid-flow control in energy storage and recovery systems
US8539763B2 (en) 2011-05-17 2013-09-24 Sustainx, Inc. Systems and methods for efficient two-phase heat transfer in compressed-air energy storage systems
US8806866B2 (en) 2011-05-17 2014-08-19 Sustainx, Inc. Systems and methods for efficient two-phase heat transfer in compressed-air energy storage systems
US8667792B2 (en) 2011-10-14 2014-03-11 Sustainx, Inc. Dead-volume management in compressed-gas energy storage and recovery systems
RU2709270C1 (en) * 2018-08-01 2019-12-17 Федеральное государственное бюджетное образовательное учреждение высшего образования "Псковский государственный университет" Single-bucket excavator

Also Published As

Publication number Publication date
CN101435451A (en) 2009-05-20

Similar Documents

Publication Publication Date Title
KR100517849B1 (en) Construction machinery
US6666022B1 (en) Drive device of working machine
CN102046887B (en) Controller of hybrid construction machine
US8209974B2 (en) Systems and methods for energy storage and recovery using compressed gas
CN103174688B (en) Hydraulic energy-saving system
KR101652112B1 (en) Hybrid Excavator Boom Actuator System and its Control Method
CN101736771B (en) Rotary decelerating and braking energy recovery system of hydraulic excavator
KR20100106215A (en) Drive for a hydraulic excavator
CN104196080B (en) Variable speed volume directly drives pure electric hydraulic crawler excavator and drives and energy-recuperation system
CN103267034B (en) Load sensitive hydraulic system with compensation valve energy recovery function
JP2004100621A (en) Construction equipment
CN102912821B (en) Hydraulic excavating energy saving system
CN101111446B (en) Handling machine using lifting magnet
CN103154390B (en) It is designed to the jumbo operated with basic repetitive cycling
CN101654915B (en) Excavator energy-recuperation system
Ge et al. Efficiency improvement and evaluation of electric hydraulic excavator with speed and displacement variable pump
CN101973271B (en) Driving and energy recovery system for hybrid excavator
CN201649155U (en) Rotary decelerating brake energy recovery system of hydraulic excavator
CN103154387A (en) Construction machine having rotary element
CN102134047B (en) Energy-saving hydraulic system of electric forklift
Lin et al. New compound energy regeneration system and control strategy for hybrid hydraulic excavators
CN102513413B (en) Hydraulic control system for novel servo pump control bending machine
CN104196067B (en) Point chamber independence variable speed volume directly drives pure electro-hydraulic pressure excavator energy-recuperation system
CN103148031A (en) Energy-saving control system of hydraulic movable arm loop
US20060090462A1 (en) Energy regeneration system for working machinery

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: 20120328

Termination date: 20121209