CN100451336C - Low idling energy consumption hydraulic power source - Google Patents

Low idling energy consumption hydraulic power source Download PDF

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Publication number
CN100451336C
CN100451336C CNB2006100124743A CN200610012474A CN100451336C CN 100451336 C CN100451336 C CN 100451336C CN B2006100124743 A CNB2006100124743 A CN B2006100124743A CN 200610012474 A CN200610012474 A CN 200610012474A CN 100451336 C CN100451336 C CN 100451336C
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China
Prior art keywords
pump
hydraulic
motor
control
controller
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CNB2006100124743A
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Chinese (zh)
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CN1821574A (en
Inventor
权龙�
李敏
秦太龙
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太原理工大学
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Publication of CN1821574A publication Critical patent/CN1821574A/en
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Publication of CN100451336C publication Critical patent/CN100451336C/en

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Abstract

The present invention relates to a low idling energy consumption hydraulic power source, which belongs to the technical field of fluid drive and control. The present invention is an oil supplying device used for reducing the energy consumption of a hydraulic system in the non-work period or partial load work condition. The present invention is composed of a hydraulic pump 1, a motor 2, a motor speed controller 3, an energy accumulator 4, an electromagnetic valve 5, a pressure sensor 6, a displacement sensor 7, a controller 8, pipelines 9 and 10, a proportional valve of a control executor 11, direction valves 12 and 13, etc. components. The present invention is characterized in that the hydraulic pump 1 is a constant pressure variable pump, the displacement sensor 7 is additionally arranged on the hydraulic pump 1, and the displacement sensor 7 is used for detecting the pump displacement; the present invention has a complex function of constant pressure, constant flow and constant power control by altering the rotation speed of the hydraulic pump 1; the power consumption of the hydraulic system is reduced by reducing the rotation speed of the hydraulic pump 1 in the non-work period or partial load work condition.

Description

Low idling energy consumption hydraulic power source

One, technical field:

Low idling energy consumption hydraulic power source of the present invention belongs to fluid transmission and control technique field, is the power source that certain pressure and flow are provided for hydraulic actuator.

Two, background technique:

Hydraulic power supply is fluid transmission and control system for final controlling element provides the unit of power, and it is converted to the hydraulic pressure energy with certain pressure and flow with mechanical energy, is used to drive oil hydraulic cylinder and oil hydraulic motor.Traditional hydraulic power supply by the changeless motoring of rotating speed quantitatively or the variable liquid pump form.For with load matched, cut down the consumption of energy, developed the volume adjustable hydraulic pump of various ways in the world.Variable displacement pump commonly used has constant voltage, constant current and three kinds of forms of permanent power.The work characteristics of constant pressure type variable displacement pump is when system works pressure is lower than the setting pressure of pump, pump is exported the peak rate of flow under the corresponding rotating speed, and when system works pressure reached the pressure set points of pump, the flow of pump output adapted to load request automatically, reduced the energy consumption relevant with flow.Constant current mode variable displacement pump output and the corresponding to flow of setting value, pressure then adapt with the load of system, reduce the energy loss with pressure correlation.The output power of permanent power and variable pump restrictive pump is consistent with setting value, and the product of POF and pressure is remained unchanged.These three kinds of pumps are compared with the power source of forming with metering pump, though all reduced the energy consumption of system to a certain extent, but test shows, when system is in inoperative during the cycle, be in the drain charge operating mode of low pressure and mass flow as pump, pump is in high-pressure low-flow operating mode etc., and motor still with the rated speed running, produce bigger energy loss.

In order to reduce the inoperative cycle, the energy loss that still causes because of motor with rated speed running, a kind of new trend is to come the flow and the pressure of control pump by the rotating speed that changes oil hydraulic pump, the useful AC asynchronous motor of the control mode that has occurred, by changing the flow and the pressure of the output of rotating speed control quantitative hydraulic pump, European patent, publication number EP 0752304 A1; With the asynchronous motor of speed variable, in conjunction with the flow and the pressure of ratio pressure and Flow valve and metering pump composition power source control supply system, European patent, publication number EP 0,509 724 A1, their deficiency is that dynamic response is slower; In German patent DE 3919823 A1, with the output flow and the pressure of actuating motor control quantitative hydraulic pump, the problem of existence is the cost height, influences its promotion and application; German also someone studies output flow and the pressure with the change displacement hydraulic pump composite control pump of the AC asynchronous motor of speed variable and electronics proportional control, and the deficiency of existence remains the cost height, and the system that forms is also very complicated.Low idling energy consumption hydraulic power source purpose of the present invention is, provide a kind of new variable speed electric motors, particularly and volume adjustable hydraulic pump compound mode as hydraulic power supply, promptly has low cost, good dynamic response can satisfy functional requirement and the energy consumption in reduction inoperative cycle of various hydraulic systems to power source again.

Three, summary of the invention

Purpose of the present invention is intended to reduce existing hydraulic power supply mechanical energy is converted to the energy loss of hydraulic pressure in can process, realizes energy-conservation.Hydraulic power supply is the unit that power is provided for fluid transmission and control system, and it is converted to the hydraulic pressure energy with certain pressure and flow with mechanical energy, is used for driving oil hydraulic cylinder or oil hydraulic motor.

A kind of low idling energy consumption hydraulic power source of the present invention, it includes oil hydraulic pump 1, motor 2, accumulator 4, solenoid valve 5, it is characterized in that oil hydraulic pump 1 is the volume adjustable hydraulic pump of constant pressure type, and has set up motor speed controller 3, pressure transducer 6, displacement transducer 7 and controller 8; Pressure transducer 6 is installed in first hydraulic pipe line 9 that connects pump discharge, the actual pressure of detection system, and be converted into electrical signal and be input in the controller 8; Displacement transducer 7 is installed in the oil hydraulic pump 1, the pivot angle of testing pump stroking mechanism, and its value is converted to electrical signal is input in the controller 8; Accumulator is connected to the outlet of oil hydraulic pump 1 by first hydraulic pipe line 9, second hydraulic pipe line 10, and the break-make of solenoid valve 5 control accumulators is housed between first hydraulic pipe line 9 and second hydraulic pipe line 10; Controller 8 provides the command signal U of control motor speed according to the traffic requirement of actuator control valves 11,12,13 fIn motor speed controller 3, and, speed setting value is revised with the signal of pressure transducer 6 that receives and displacement transducer 7; Rotational speed governor 3 control rotating speed of motor and power.Actuator control valves 11,12,13 is used to control the moving direction and the speed of final controlling element, and final controlling element can be 1,2 or a plurality of in the system.

Above-mentioned low idling energy consumption hydraulic power source is characterized in that oil hydraulic pump 1 is the artificial constant pressure type variable displacement pump of adjusting of machinery control or with the self-adjusting electric-hydraulic proportion constant pressure variable displacement pump of electrical signal.

Above-mentioned low idling energy consumption hydraulic power source is characterized in that motor 2 is AC induction motor, AC servo motor or closes reluctance motor.

Above-mentioned low idling energy consumption hydraulic power source, but it is characterized in that motor speed controller 3 is that frequency variator, the control motor of continuous control motor speed has only several other controllers of fixed rotating speed level, or soft starting device.

Low idling energy consumption hydraulic power source major advantage of the present invention is embodied in, and I, is in inoperatives such as low pressure, drain charge during the cycle when hydraulic system, by reducing the rotating speed of oil hydraulic pump, will greatly reduce the energy loss that produces with the rated speed rotation because of oil hydraulic pump.II, in the working procedure of hydraulic system, by improving the rotating speed of pump, can strengthen the fuel supply flow rate of system, reduce the volume of selected pump.III, be in the function of permanent power working state, thereby also make the superposeed feature of permanent power control of this power source because motor speed controller itself just has the control motor.IV, by changing the rotating speed of pump, make pump have the compound control function of pressure and flow, can realize the flow matches control of multi executors.V, pivot angle and delivery pressure by the testing pump stroking mechanism cooperate rotating speed of motor, can realize the efficiency optimization control of power source.The present invention can replace existing hydraulic power supply, is widely used in the hydraulic industry field, realizes energy-conservation.

Four, description of drawings

Fig. 1 low idling energy consumption hydraulic power source.Wherein

The 1-oil hydraulic pump 2-motor 3-motor speed controller 4-accumulator 5-solenoid valve 6-pressure transducer 7-displacement transducer 8-controller 9-first hydraulic pipe line 10-second hydraulic pipe line 11,12,13-actuator control valves

Below in conjunction with accompanying drawing principle of the present invention and structure are described in further detail.

Low idling energy consumption hydraulic power source of the present invention is by hydraulic pump 1, motor 2, motor speed controller 3, the displacement of the magnetic valve 5 of accumulator 4, switching regulator, pressure sensor 6, testing pump discharge capacity (pivot angle) Sensor 7, controller 8, the first fluid pressure lines 9, second fluid pressure line 10, actuator control valves 11, 12, the parts such as 13 form. Wherein, hydraulic pump 1 adopts mechanical constant pressure type variable pump or electronics ratio The constant pressure type variable pump of control is characterized in when system pressure is lower than the setting pressure of this pump, and pump is exported The big corresponding flow of discharge capacity. And after system pressure reached its setting value, the output flow of pump adapted to automatically Load request. Motor 2 is the prime mover that drive hydraulic pump, changes electric energy into mechanical energy. Motor speed The effect of controller 3 is the speed of control electric machine rotation, also can play limiting motor output torque and merit simultaneously The purpose of rate. The effect of accumulator 4 is the hydraulic oil that stores certain pressure, hydraulic pump in the compensation dynamic process For the required flow of shortage of oil. The duty of magnetic valve 5 control accumulators is to disconnect or connection. Pressure Sensor 6 detects and the actual pressure value in monitoring hydraulic pump exit, and is converted into the signal of telecommunication and offers Controller 8. Displacement transducer 7 is used for detecting the pivot angle of hydraulic pump stroking mechanism, and this signal is transformed For the signal of telecommunication is input to controller 8. The effect of controller 8 is duty, the pressure sensings according to system The information that device 6 and displacement transducer 7 provide, the velocity of rotation of control motor, and the maximum of limiting motor Power output. Actuator control valves 11,12,13 is used for the direction of motion and the speed of control executing agency.

The course of work of this power source is: at first according to the movement velocity of load, when being the multi executors operating mode The time, according to the speed of each actuator and, determine the rotating speed of motor by the maximum pump discharge of pump, and this established Definite value offers motor speed controller 3, when system pressure is lower than the setting value of hydraulic pump, by detecting System pressure value and hydraulic pressure pump delivery, according to the leakage characteristics of pump, the rotating speed of pump is revised. When When system is in maximum pressure, adapt to the required flow of load by changing simultaneously pump delivery and rotating speed. When After the power output of pump surpassed the set value of the power of motor, rotational speed governor will reduce motor automatically Rotating speed, the power output of restriction hydraulic pump. When all actuators were not worked, the rotating speed of control pump was certain One minimum, system is in the low energy consumption duty. If at this moment certain actuator starts suddenly, for full The requirement of foot dynamic characteristic can open accumulator 4 by control magnetic valve 5, replenishes flow.

Five, embodiment

Mode of execution 1:

In the embodiment depicted in fig. 1, oil hydraulic pump 1 adopts the first guide structure constant pressure variable displacement pump of machinery control, motor 2 adopts AC asynchronous motor, motor speed controller 3 is selected the frequency variator of vector control mode for use, accumulator 4 is selected bladder structure for use, solenoid valve 5 is selected 2 two-way electromagnetic valves of 10 latus rectums for use, and it is 0-35MPa that pressure transducer 6 selects measuring range, and is integrated with preamplifier.Displacement transducer 7 is selected the differential transformer principle for use, and controller 8 is made of calculator chip.

Mode of execution 2:

The difference of present embodiment and mode of execution 1 is the constant pressure variable displacement pump that the constant pressure variable displacement pump of machinery control in the mode 1 is changed into the electronics proportional control, and motor speed controller 3 is selected soft initiator for use, the remaining part unanimity.

Mode of execution 3:

The difference of present embodiment and mode of execution 1 is that the AC asynchronous motor that will adopt in the mode 1 changes AC servo motor into, the remaining part unanimity.

Claims (4)

1, a kind of low idling energy consumption hydraulic power source, it includes oil hydraulic pump (1), motor (2), accumulator (4), solenoid valve (5), it is characterized in that oil hydraulic pump (1) is the volume adjustable hydraulic pump of constant pressure type, and has set up motor speed controller (3), pressure transducer (6), displacement transducer (7) and controller (8); Pressure transducer (6) is installed in first hydraulic pipe line (9) that connects pump discharge, the actual pressure of detection system, and be converted into electrical signal and be input in the controller (8); Displacement transducer (7) is installed in the oil hydraulic pump (1), the pivot angle of testing pump stroking mechanism, and its value is converted to electrical signal is input in the controller (8); Accumulator is connected to the outlet of oil hydraulic pump (1) by first hydraulic pipe line (9), second hydraulic pipe line (10), and the break-make of solenoid valve (5) control accumulator is housed between first hydraulic pipe line (9) and second hydraulic pipe line (10); Controller (8) provides the command signal U of control motor speed according to the traffic requirement of actuator control valves (11), (12), (13) fIn the motor speed controller (3), and, speed setting value is revised with the signal of pressure transducer that receives (6) and displacement transducer (7); Rotational speed governor (3) control rotating speed of motor and power; Actuator control valves (11), (12), (13) are used to control the moving direction and the speed of final controlling element, and final controlling element can be 1,2 or a plurality of in the system.
2, low idling energy consumption hydraulic power source according to claim 1 is characterized in that oil hydraulic pump (1) is the artificial constant pressure type variable displacement pump of adjusting of machinery control or with the self-adjusting electric-hydraulic proportion constant pressure variable displacement pump of electrical signal.
3, low idling energy consumption hydraulic power source according to claim 1 is characterized in that motor (2) is AC induction motor, AC servo motor or switched reluctance machines.
4, low idling energy consumption hydraulic power source according to claim 1, it is characterized in that motor speed controller (3) but be that frequency variator, the control motor of continuous control motor speed has only several other controllers of fixed rotating speed level, or soft starting device.
CNB2006100124743A 2006-03-07 2006-03-07 Low idling energy consumption hydraulic power source CN100451336C (en)

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Application Number Priority Date Filing Date Title
CNB2006100124743A CN100451336C (en) 2006-03-07 2006-03-07 Low idling energy consumption hydraulic power source

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CN100451336C true CN100451336C (en) 2009-01-14

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US7845913B2 (en) 2004-08-26 2010-12-07 Pentair Water Pool And Spa, Inc. Flow control
US7686589B2 (en) 2004-08-26 2010-03-30 Pentair Water Pool And Spa, Inc. Pumping system with power optimization
US8469675B2 (en) 2004-08-26 2013-06-25 Pentair Water Pool And Spa, Inc. Priming protection
US8480373B2 (en) 2004-08-26 2013-07-09 Pentair Water Pool And Spa, Inc. Filter loading
US8602745B2 (en) 2004-08-26 2013-12-10 Pentair Water Pool And Spa, Inc. Anti-entrapment and anti-dead head function
US8043070B2 (en) 2004-08-26 2011-10-25 Pentair Water Pool And Spa, Inc. Speed control
GB0614940D0 (en) * 2006-07-27 2006-09-06 Arternis Intelligent Power Ltd Vehicle traction and stability control system employing control of fluid quanta
WO2010042406A1 (en) 2008-10-06 2010-04-15 Pentair Water Pool And Spa, Inc. Method of operating a safety vacuum release system
JP5604615B2 (en) * 2009-03-23 2014-10-08 佐藤 寛 Energy saving control device and equipment or injection molding machine equipped with this energy saving control device
US9556874B2 (en) * 2009-06-09 2017-01-31 Pentair Flow Technologies, Llc Method of controlling a pump and motor
US8564233B2 (en) 2009-06-09 2013-10-22 Sta-Rite Industries, Llc Safety system and method for pump and motor
DE102010033346B3 (en) * 2010-08-04 2012-02-02 Bucyrus Hex Gmbh Method for starting an electric motor in a hydraulically operated machine
US9243413B2 (en) 2010-12-08 2016-01-26 Pentair Water Pool And Spa, Inc. Discharge vacuum relief valve for safety vacuum release system
US9885360B2 (en) 2012-10-25 2018-02-06 Pentair Flow Technologies, Llc Battery backup sump pump systems and methods
US9590537B2 (en) 2013-03-15 2017-03-07 Pentair Flow Technologies, Llc Method of controlling a pump and motor
CN104514777A (en) * 2013-09-29 2015-04-15 佛山市恒力泰机械有限公司 Energy-saving servo control system of ceramic brick pressing machine
CN105804964B (en) * 2016-03-15 2018-05-29 北京星达科技发展有限公司 High pressure constant flow pump and flow closed loop control method
CN106499614B (en) * 2016-10-28 2017-11-07 合肥工业大学 Hydraulic energy-saving system and control method that variable speed electric motors, particularly is matched with variable displacement with constant power pump
CN108071620A (en) 2016-11-16 2018-05-25 丹佛斯动力系统(浙江)有限公司 Electrically-controlled valve, hydraulic pump and the hydraulic pump system for possessing changeable control function
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CN1079026A (en) * 1992-05-21 1993-12-01 北京市西城区新开通用试验厂 Digit control hydraulic meter high molecular pump
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Application publication date: 20060823

Assignee: Shanxi Electric Equipment Co., Ltd.

Assignor: Taiyuan University of Technology

Contract record no.: 2012990000655

Denomination of invention: Low idling energy consumption hydraulic power source

Granted publication date: 20090114

License type: Exclusive License

Record date: 20120910

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Change date: 20130322

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Assignee after: Shanxi Shiwopu Electrical Equipment Co. Ltd.

Assignee before: Shanxi Electric Equipment Co., Ltd.

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