CN206467707U - A kind of excavator energy regenerating and utilize system - Google Patents

A kind of excavator energy regenerating and utilize system Download PDF

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Publication number
CN206467707U
CN206467707U CN201621012834.5U CN201621012834U CN206467707U CN 206467707 U CN206467707 U CN 206467707U CN 201621012834 U CN201621012834 U CN 201621012834U CN 206467707 U CN206467707 U CN 206467707U
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oil cylinder
control valve
hydraulic
fluid port
hydraulic fluid
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费树辉
贺艳飞
秦家升
金月峰
王振兴
方锦辉
王钦
谭贤文
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Xuzhou XCMG Excavator Machinery Co Ltd
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Xuzhou XCMG Excavator Machinery Co Ltd
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Abstract

The utility model discloses a kind of excavator energy regenerating and utilizes system, including volume adjustable hydraulic pump, the first control valve, the first oil cylinder, the second control valve, the second oil cylinder, hydraulic accumulator and overflow valve, first oil cylinder is boom cylinder, for driving excavator swing arm lifting work;When swing arm declines, the first oil cylinder is set to retract by the first control valve, the first oil cylinder rodless cavity makes the supercharging of recovery fluid enter hydraulic accumulator through the second control valve, the second oil cylinder, realizes the recovery of movable arm potential energy;When boom arm lift, according to the first Flow of Cylinder needs, control volume adjustable hydraulic pump and hydraulic accumulator drive the operation of the first oil cylinder, realize the utilization of movable arm potential energy.Control manipulation two oil cylinders and the work of hydraulic accumulator of the utility model by each control valve, realize the lifting of swing arm, while realizing the direct recovery and utilization of movable arm potential energy, have saved cost;Do not influence operability, simple in construction, transmission efficiency.

Description

A kind of excavator energy regenerating and utilize system
Technical field
The present invention relates to a kind of excavator energy regenerating and system is utilized, belong to excavator energy regenerating and utilization technology neck Domain.
Background technology
With developing rapidly for social economy, energy shortage and problem of environmental pollution are on the rise, and each state all will reduction Energy loss, environmental protection are brought into schedule.Meanwhile, Energy Efficiency Ratio is one of key parameter of hydraulic crawler excavator market competition, therefore The Study on energy saving of hydraulic crawler excavator and application are particularly necessary.
At present, oil-liquid hybrid electric technical research has been included in national 13 science and technology supporting projects, based on excavator energy The hydraulic hybrid Study on energy saving of recovery and application, can mainly be returned to excavator swing arm potential energy, rotary braking Receive, the energy of recovery is stored by accumulator.The energy utilization mode of recovery mainly has directly or indirectly two kinds, and directly utilizing is By the energy direct drive executive component work of recovery, indirect utilization is that the energy of recovery is passed through into the element transformations such as pump/motor Executive component is driven to work again afterwards, indirect utilization mode transmission efficiency is relatively low, direct Land use systems transmission efficiency is higher.
The content of the invention
In view of the above-mentioned problems of the prior art, the present invention provides a kind of excavator energy regenerating and utilizes system, it is real While existing swing arm lifting, the direct recovery and utilization of movable arm potential energy can be achieved;It is simple in construction, operability and transmission effect can be improved Rate.
To achieve these goals, the present invention is used a kind of excavator energy regenerating and utilize system, including variable liquid Press pump, the first control valve, the first oil cylinder, the second control valve, the second oil cylinder, hydraulic accumulator and overflow valve, volume adjustable hydraulic pump Oil inlet be connected with fuel tank, oil-out is connected with the hydraulic fluid port A of the first control valve;The hydraulic fluid port B and the first oil cylinder of first control valve Rod chamber connection, the hydraulic fluid port C of the first control valve is connected with the rodless cavity of the first oil cylinder;The hydraulic fluid port A of second control valve and first The rodless cavity connection of oil cylinder, the hydraulic fluid port B of the second control valve is connected by the first check valve with the hydraulic fluid port A of the second oil cylinder, the second oil The hydraulic fluid port B of cylinder is connected with the oil inlet of hydraulic accumulator, overflow valve;The hydraulic fluid port C of second control valve passes through the second check valve and liquid Press the oil inlet connection of accumulator, overflow valve;Hydraulic fluid port D, the oil-out of overflow valve of first control valve are connected with fuel tank;First oil Cylinder is boom cylinder, for driving excavator swing arm lifting work;When swing arm declines, the first oil cylinder is set to contract by the first control valve Return, the first oil cylinder rodless cavity makes the supercharging of recovery fluid enter hydraulic accumulator through the second control valve, the second oil cylinder, realizes swing arm gesture The direct recovery of energy;When boom arm lift, according to the first Flow of Cylinder needs, control volume adjustable hydraulic pump and hydraulic accumulator driving First oil cylinder is run, and realizes the direct utilization of movable arm potential energy.
Preferably, the discharge capacity of the volume adjustable hydraulic pump can according to the need for the first oil cylinder and hydraulic accumulator amount Automatic change matching, meanwhile, the release uninterrupted of hydraulic accumulator is according to the amount of itself and the row of volume adjustable hydraulic pump Amount size is controlled in real time by the second control valve.
Preferably, second oil cylinder is pressurized cylinder, can pass through the oil of the left surface A1 of the second oil cylinder inner carrier and second The right flank A2 of cylinder inner carrier area controls to be filled with the fluid pressure of hydraulic accumulator than the Preliminary pressure-filled with hydraulic accumulator Power size.
Preferably, second control valve is flow and directional control valve, can according to the output pressure of hydraulic accumulator and Hydraulic fluid port A pressure controls the output flow of hydraulic accumulator at first oil cylinder rodless cavity.
Operation principle:
During swing arm down maneuver, control the first control valve commutation makes the hydraulic fluid port A of the first control valve be connected with hydraulic fluid port B.When When one cylinder rod chamber pressure reaches setting value, the hydraulic fluid port C of the first control valve is connected with hydraulic fluid port D, volume adjustable hydraulic pump output fluid, Hydraulic fluid port A through the first control valve, hydraulic fluid port B flow into the rod chamber of the first oil cylinder, the rodless cavity fluid outflow of the first oil cylinder, and through the Hydraulic fluid port C, the hydraulic fluid port D of one control valve flow back to fuel tank.When the first cylinder rod chamber pressure is not up to setting value, the first control valve Hydraulic fluid port C and hydraulic fluid port D disconnects, and controls the second control valve, the hydraulic fluid port A of the second control valve is connected with hydraulic fluid port B, volume adjustable hydraulic pump output Fluid, the hydraulic fluid port A through the first control valve, hydraulic fluid port B flow into the rod chamber of the first oil cylinder, and the rodless cavity fluid of the first oil cylinder flows out, And hydraulic fluid port A, B through the second control valve, the hydraulic fluid port A, hydraulic fluid port B of the fluid from the second oil cylinder of the second oil cylinder are flowed into through first direction valve Hydraulic accumulator is exited into, the first oil cylinder is retracted, with the oil increasing for entering hydraulic accumulator, the pressure of hydraulic accumulator Increase.When meeting or exceeding the setting pressure of hydraulic accumulator, fluid flows back to fuel tank through overflow valve, here the oil of the second oil cylinder Mouthful B pressure for hydraulic fluid port A pressure and A1/A2 areas than product.
When swing arm is lifted at a slow speed, the hydraulic fluid port A of the first control valve is connected with hydraulic fluid port C, and hydraulic fluid port B is connected with hydraulic fluid port D.Now, become Hydraulic pump output fluid hydraulic fluid port A, C through the first control valve are measured, oil in the rodless cavity of the first oil cylinder, the first cylinder rod chamber is flowed into Liquid flows out, and hydraulic fluid port B, D through the first control valve flow back to fuel tank, and the first oil cylinder of driving stretches out, to lift excavator swing arm at a slow speed.
During swing arm fast lifting, the first control valve of control and the second control valve make the hydraulic fluid port A and hydraulic fluid port C of the first control valve Connection, the hydraulic fluid port C of the second control valve is connected with hydraulic fluid port A.Now, volume adjustable hydraulic pump output fluid, flows through the first control valve and obtains oily Mouth A and hydraulic fluid port C, the fluid of hydraulic accumulator flows through the second check valve, the hydraulic fluid port C and A of the second control valve, with the first control valve Hydraulic fluid port C fluid converges the rodless cavity into the first oil cylinder, drives the extending action of the first oil cylinder 4, make excavator swing arm it is quick on Rise.
Compared with prior art, the present invention passes through each control valve control two oil cylinders of manipulation and the work of hydraulic accumulator Make, realize the lifting of swing arm, while realizing the direct recovery and utilization of movable arm potential energy, saved cost.Specifically, swing arm During decline, the first oil cylinder is set to retract by the first control valve, the first oil cylinder rodless cavity makes recovery through the second control valve, the second oil cylinder Fluid supercharging enters hydraulic accumulator, realizes the direct recovery of movable arm potential energy;When boom arm lift, according to the first Flow of Cylinder need Will, control volume adjustable hydraulic pump and hydraulic accumulator drive the operation of the first oil cylinder, realize the direct utilization of movable arm potential energy.Eventually through Valve directly reclaims and utilized excavator swing arm potential energy, does not influence operability, simple in construction, transmission efficiency.
Brief description of the drawings
Fig. 1 is hydraulic schematic diagram of the invention.
In figure:1st, fuel tank, 2, volume adjustable hydraulic pump, the 3, first control valve, the 4, first oil cylinder, the 5, second control valve, 6, first Check valve, the 7, second oil cylinder, the 8, second check valve, 9, hydraulic accumulator, 10, overflow valve.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of excavator energy regenerating and system is utilized, including volume adjustable hydraulic pump 2, the first control valve 3, One oil cylinder 4, the second control valve 5, the second oil cylinder 7, hydraulic accumulator 9 and overflow valve 10, oil inlet and the oil of volume adjustable hydraulic pump 2 Case 1 is connected, and oil-out is connected with the hydraulic fluid port A of the first control valve 3;The hydraulic fluid port B of first control valve 3 and the first oil cylinder 4 rod chamber Connection, the hydraulic fluid port C of the first control valve 3 is connected with the rodless cavity of the first oil cylinder 4;The hydraulic fluid port A of second control valve 5 and the first oil cylinder 4 Rodless cavity connection, the hydraulic fluid port B of the second control valve 5 is connected by the first check valve 6 with the hydraulic fluid port A of the second oil cylinder 7, and second is oily The hydraulic fluid port B of cylinder 7 is connected with the oil inlet of hydraulic accumulator 9, overflow valve 10;The hydraulic fluid port C of second control valve 5 is unidirectional by second Valve 8 is connected with the oil inlet of hydraulic accumulator 9, overflow valve 10;Hydraulic fluid port D, the oil-out of overflow valve 10 and the oil of first control valve 3 Case 1 is connected;First oil cylinder 4 is boom cylinder, for driving excavator swing arm lifting work;When swing arm declines, pass through the first control Valve 3 processed makes the first oil cylinder 4 retract, and the rodless cavity of the first oil cylinder 4 makes the supercharging entrance of recovery fluid through the second control valve 5, the second oil cylinder 7 Hydraulic accumulator 9, realizes the direct recovery of movable arm potential energy;When boom arm lift, according to the flow needs of the first oil cylinder 4, control becomes Amount hydraulic pump 2 and hydraulic accumulator 9 drive the first oil cylinder 4 to run, and realize the direct utilization of movable arm potential energy.
Preferably, the discharge capacity of the volume adjustable hydraulic pump 2 can according to the need for the first oil cylinder 4 and hydraulic accumulator 9 energy How many automatic change matchings, meanwhile, the release uninterrupted of hydraulic accumulator 9 is according to the amount and volume adjustable hydraulic pump of itself 2 displacement size is controlled in real time by the second control valve 5.
Preferably, second oil cylinder 7 is pressurized cylinder, can pass through the oil of the left surface A1 of the second oil cylinder inner carrier and second The right flank A2 of cylinder inner carrier area controls to be filled with the fluid of hydraulic accumulator 9 than the Preliminary pressure-filled with hydraulic accumulator 9 Pressure size.
Preferably, second control valve 5 is flow and directional control valve, can be according to the output pressure of hydraulic accumulator 9 The output flow of hydraulic accumulator 9 is controlled with the pressure of hydraulic fluid port A at the rodless cavity of the first oil cylinder 4.
The course of work (refers to Fig. 1):
During swing arm down maneuver, controllable first control valve 3 commutates, and the hydraulic fluid port A of the first control valve 3 is connected with hydraulic fluid port B. When the pressure of the rod chamber of the first oil cylinder 4 reaches setting value, the hydraulic fluid port C of the first control valve 3 is connected with hydraulic fluid port D, volume adjustable hydraulic pump 2 Fluid is exported, the hydraulic fluid port B that the hydraulic fluid port A through the first control valve 3, hydraulic fluid port B flow into the first oil cylinder 4 has bar into the first oil cylinder 4 Chamber, the rodless cavity fluid of the first oil cylinder 4 flows out through hydraulic fluid port A, and hydraulic fluid port C, hydraulic fluid port D through the first control valve 3 flow back to fuel tank 1.When first When the rod chamber pressure of oil cylinder 4 is not up to setting value, the hydraulic fluid port C and hydraulic fluid port D of the first control valve 3 disconnect, and control the second control valve 5, The hydraulic fluid port A of the second control valve 5 is set to be connected with hydraulic fluid port B, the output fluid of volume adjustable hydraulic pump 2, hydraulic fluid port A and oil through the first control valve 3 Mouth B, the hydraulic fluid port B for flowing into the first oil cylinder 4 enters the rod chamber of the first oil cylinder 4, and the rodless cavity fluid of the first oil cylinder 4 flows through hydraulic fluid port A Go out, hydraulic fluid port A, hydraulic fluid port B through the second control valve 5, first direction valve 6 flow into the hydraulic fluid port A of the second oil cylinder 7, and fluid is from the second oil cylinder 7 hydraulic fluid port B exits into hydraulic accumulator 9, and the first oil cylinder 4 is retracted.With the oil increasing for entering hydraulic accumulator 9, hydraulic pressure The pressure increase of accumulator 9;When meeting or exceeding the setting pressure of hydraulic accumulator 9, fluid flows back to fuel tank through overflow valve 10 1, here the oil-out B of the second oil cylinder 7 pressure for oil inlet A pressure and A1/A2 areas than product.
When swing arm is lifted at a slow speed, the hydraulic fluid port A of the first control valve 3 is connected with hydraulic fluid port C, and hydraulic fluid port B is connected with hydraulic fluid port D.Now, become Measure hydraulic fluid port A of the output fluid of hydraulic pump 2 through the first control valve 3, the hydraulic fluid port A of hydraulic fluid port C the first oil cylinders 4 of inflow and enter the first oil cylinder 4 Rodless cavity, the hydraulic fluid port B outflows of the rod chamber fluid of the first oil cylinder 4 through the first oil cylinder of hydraulic fluid port 4 flow through the oil of the first control valve 3 Mouth B and hydraulic fluid port D, flows back to fuel tank 1, the first oil cylinder 4 of driving stretches out, to lift excavator swing arm.
During swing arm fast lifting, the first control valve 3 of control and the second control valve 5 make the hydraulic fluid port A and oil of the first control valve 3 Mouth C connections, the hydraulic fluid port C of the second control valve 5 is connected with hydraulic fluid port A.Now, the output of volume adjustable hydraulic pump 2 fluid, flows through the first control The hydraulic fluid port A and hydraulic fluid port C of valve 3, the fluid of hydraulic accumulator 9 flow through the second check valve 8, hydraulic fluid port C, A of the second control valve 5, with The hydraulic fluid port C of one control valve 3 fluid converges the hydraulic fluid port A into the first oil cylinder 4, flows into the rodless cavity of the first oil cylinder 4, driving first The extending action of oil cylinder 4, rises excavator swing arm.
Control two oil cylinders of manipulation and the work of hydraulic accumulator that each control valve is passed through from said structure, the present invention Make, realize the lifting of swing arm, while realizing the direct recovery and utilization of movable arm potential energy, saved cost.Eventually through valve Excavator swing arm potential energy is directly reclaimed and utilized, operability, simple in construction, transmission efficiency is not influenceed.

Claims (4)

1. a kind of excavator energy regenerating and utilize system, it is characterised in that including volume adjustable hydraulic pump (2), the first control valve (3), the first oil cylinder (4), the second control valve (5), the second oil cylinder (7), hydraulic accumulator (9) and overflow valve (10),
The oil inlet of volume adjustable hydraulic pump (2) is connected with fuel tank (1), and oil-out is connected with the hydraulic fluid port A of the first control valve (3);First The hydraulic fluid port B of control valve (3) is connected with the rod chamber of the first oil cylinder (4), the hydraulic fluid port C of the first control valve (3) and the first oil cylinder (4) Rodless cavity is connected;
The hydraulic fluid port A of second control valve (5) is connected with the rodless cavity of the first oil cylinder (4), and the hydraulic fluid port B of the second control valve (5) passes through One check valve (6) is connected with the hydraulic fluid port A of the second oil cylinder (7), hydraulic fluid port B and hydraulic accumulator (9), the overflow valve of the second oil cylinder (7) (10) oil inlet connection;The hydraulic fluid port C of second control valve (5) passes through the second check valve (8) and hydraulic accumulator (9), overflow valve (10) oil inlet connection;
Hydraulic fluid port D, the oil-out of overflow valve (10) of first control valve (3) are connected with fuel tank (1);
First oil cylinder (4) is boom cylinder, for driving excavator swing arm lifting work;When swing arm declines, pass through the first control Valve (3) makes the first oil cylinder (4) retract, and the first oil cylinder (4) rodless cavity makes recovery fluid through the second control valve (5), the second oil cylinder (7) Supercharging enters hydraulic accumulator (9), realizes the direct recovery of movable arm potential energy;When boom arm lift, according to the first oil cylinder (4) flow Need, control volume adjustable hydraulic pump (2) and hydraulic accumulator (9) drive the first oil cylinder (4) operation, realize the direct profit of movable arm potential energy With.
2. a kind of excavator energy regenerating according to claim 1 and utilize system, it is characterised in that the variable delivery hydraulic The discharge capacity of pump (2) can according to the need for the first oil cylinder (4) and the amount of hydraulic accumulator (9) changes matching automatically, meanwhile, The release uninterrupted of hydraulic accumulator (9) passes through the according to the displacement size of itself amount and volume adjustable hydraulic pump (2) Two control valves (5) are controlled in real time.
3. a kind of excavator energy regenerating according to claim 1 and utilize system, it is characterised in that second oil cylinder (7) it is pressurized cylinder, the left surface (A1) of the second oil cylinder inner carrier and the right flank (A2) of the second oil cylinder inner carrier can be passed through The Preliminary pressure-filled of area ratio and hydraulic accumulator (9) controls to be filled with the oil liquid pressure size of hydraulic accumulator (9).
4. a kind of excavator energy regenerating according to claim 1 and utilize system, it is characterised in that second control Valve (5) is flow and directional control valve, can be according to oil at the output pressure and the first oil cylinder (4) rodless cavity of hydraulic accumulator (9) Mouthful A pressure controls the output flow of hydraulic accumulator (9).
CN201621012834.5U 2016-08-31 2016-08-31 A kind of excavator energy regenerating and utilize system Active CN206467707U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201621012834.5U CN206467707U (en) 2016-08-31 2016-08-31 A kind of excavator energy regenerating and utilize system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201621012834.5U CN206467707U (en) 2016-08-31 2016-08-31 A kind of excavator energy regenerating and utilize system

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106223391A (en) * 2016-08-31 2016-12-14 徐州徐工挖掘机械有限公司 A kind of excavator energy regenerating and utilize system
CN110067790A (en) * 2018-07-06 2019-07-30 孔庆潭 A kind of device and method that gravitional force conversion recycles
CN111119271A (en) * 2019-12-28 2020-05-08 潍柴动力股份有限公司 Device and method for improving plateau capacity of excavator based on energy recovery

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106223391A (en) * 2016-08-31 2016-12-14 徐州徐工挖掘机械有限公司 A kind of excavator energy regenerating and utilize system
CN110067790A (en) * 2018-07-06 2019-07-30 孔庆潭 A kind of device and method that gravitional force conversion recycles
CN111119271A (en) * 2019-12-28 2020-05-08 潍柴动力股份有限公司 Device and method for improving plateau capacity of excavator based on energy recovery

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