CN108869462A - A kind of hydraulic cushion of hydraulic press device with energy recovery function - Google Patents
A kind of hydraulic cushion of hydraulic press device with energy recovery function Download PDFInfo
- Publication number
- CN108869462A CN108869462A CN201810639394.3A CN201810639394A CN108869462A CN 108869462 A CN108869462 A CN 108869462A CN 201810639394 A CN201810639394 A CN 201810639394A CN 108869462 A CN108869462 A CN 108869462A
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- Prior art keywords
- servo motor
- hydraulic
- oil
- gear pump
- energy
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/14—Energy-recuperation means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a kind of hydraulic cushion of hydraulic press device with energy recovery function.Controller is connected with the control terminal of servo motor, and the output shaft of the servo motor and the input shaft of crescent gear pump are mechanically connected, and realizes and rotates synchronously；The fairing both ends are connected with servo motor, energy storage device respectively, realize the recycling to servo motor output electric energy；Crescent gear pump oil circuit one end is connected with hydraulic cylinder by oil pipe, realizes oil inlet and oil return process；The crescent gear pump oil circuit other end is connected with fuel tank by oil pipe, recycles oil liquid in the process for providing oil liquid and oil return during oil inlet.Mechanical transmission structure of the present invention is simple；Low speed loading performance is strong；Original hydraulic system is transformed smaller, the stringent matching requirement of nothing, universality is strong；Realize that the energy regenerating in production process recycles, system heating is smaller, and energy recovery efficiency is higher.
Description
Technical field
The present invention relates to energy regenerating fields, fill more particularly to a kind of hydraulic cushion of hydraulic press with energy recovery function
It sets.
Background technique
In the course of work of current hydraulic press hydraulic cylinder, there are a large amount of energy loss phenomenons：Motor driven hydraulic cylinder
Uplink pushes hydraulic die cushion, after stroke, hydraulic cylinder downlink under the effect of external force, for hydraulic, existing skill in control hydraulic cylinder
A kind of mode of art is to be controlled by overflow valve hydraulic, and the oil liquid of spilling enters fuel tank, causes spill losses, the oil liquid in fuel tank
Temperature increases, and is cooled down by cooling system to the oil liquid in fuel tank, system has in terms of spill losses and cooling system two
Energy loss；Another way is that servo motor gives either-rotation motor torque, and to control the hydraulic of hydraulic cylinder, extra hydraulic drive is double
It is rotated to motor, is rotor mechanical energy by liquid potential energy, by overcoming Motor torque acting that motor internal resistance is made to generate heat, system
Still there is energy loss in terms of internal resistance is generated heat and drives servo motor two.
Current common hydraulic system energy recovery scheme such as mechanical compensation energy regenerating and compensation hydraulic energy regenerating
Scheme etc. is required to make original hydraulic system larger change, and there is also at high cost when towards Practical Project hydraulic device
High, the problems such as structure is complicated, installation space is narrow etc., it is therefore desirable to one kind can reach energy regenerating purpose and,
Lesser energy recycle device is changed to original hydraulic system.
Summary of the invention
The invention reside in for the deficiency in background technique, it is hydraulic to provide a kind of hydraulic press with energy recovery function
Cushion device.The invention has the advantages that：Device for mechanical drive mechanism is simple；Low speed loading performance is strong；Original hydraulic system is changed
Smaller, the stringent matching requirement of nothing is made, universality is strong；Realize that the energy regenerating in production process recycles, smaller, the energy of system heating
It is higher to measure recovery efficiency.
The technical scheme adopted by the invention is that：
The present invention includes hydraulic cylinder, crescent gear pump, servo motor, controller, fairing, energy storage device and oil
Case：The controller is connected with the control terminal of servo motor, the input of the output shaft and crescent gear pump of the servo motor
Shaft mechanical connection, realizes and rotates synchronously；The fairing both ends are connected with servo motor, energy storage device respectively, realize to watching
Take the recycling of motor output electric energy；Crescent gear pump oil circuit one end is connected with hydraulic cylinder by oil pipe, realize into
Oil and oil return process；The crescent gear pump oil circuit other end is connected with fuel tank by oil pipe, for providing during oil inlet
Oil liquid is recycled during oil liquid and oil return.
It is equipped with switch between the controller and servo motor connection, is closed the switch during oil inlet, controller control
Servo motor rotation processed；It switchs and disconnects during oil return, servo motor is driven by crescent gear pump and rotated.
During oil inlet, servo motor is used as motor by external power grid power supply, and crescent gear pump is by servo motor band
Turn movement is hydraulic pump, and oil liquid is pumped into hydraulic cylinder；During oil return, servo motor is output to the outside electric current as hair
Motor, crescent gear pump are used as hydraulic motor by the oil liquid driving between hydraulic cylinder and fuel tank, drive servo motor reversion hair
Electricity.
The energy storage device is selected as battery, and the charged with direct current after fairing rectification is to battery to subsequent confession
Electricity uses.
The servo motor uses separated exciting DC servo motor.
The servo motor is internally provided with armature winding and excitation winding, and armature winding and excitation winding are without direct phase
Even, excitation winding both ends are through adjustable resistance R connection external dc power U, the exciting current I of excitation windingaBy external dc electricity
Source U is provided, and is divided by adjustable resistance R and is quickly adjusted exciting current size.
In the case where servo motor realizes oil return process condition as generator, servo motor passes through the improvement of foregoing circuit structure
Change exciting current to control internal electromagnetic torque, thus the inside engaged gear that control is connected with servo motor mechanical structure
The hydraulic torque of pump is finally reached the purpose that pressure is constant during controlling oil return.
The present invention realizes：During oil inlet, servo motor makees motor by power grid power supply, drives under controller action
Crescent gear pump realizes that feed liquor, electric energy are converted into mechanical energy and are then converted to hydraulic energy；During oil return, hydraulic cylinder downlink, oil
Liquid is pumped out by crescent gear pump, drives servo motor reversion, and controller and servo motor disconnect at this time, and servo motor is sent out
Motor is conveyed to energy storage device storage, realizes energy regenerating when hydraulic die cushion backhaul after electric energy is rectified.
The invention has the advantages that：
For the energy loss generated in hydraulic press hydraulic cylinder works return stroke, the energy including hydraulic energy and interior energy form
Amount loss, can have good recycling and reusing effect.
The present invention makees liquid compared with conventional hydraulic energy recycle device, due to using when crescent gear pump rotates forward
Press pump, when reversion, make hydraulic motor；Make motor when rotating forward simultaneously using separated exciting servo motor, when reversion makees the spy of generator
Property, realize energy regenerating target simultaneously, also have on original hydraulic system change influence it is smaller, overall cost is lower, machine
The advantage that tool structure is simple, universality is strong.
Detailed description of the invention
Fig. 1 is the device of the invention structural principle schematic diagram, and switch state and energy turn during oil inlet are indicated in figure
Change situation.
Fig. 2 is that switch state and energy of the present invention during oil return convert situation.
Fig. 3 is his used excitation servo motor Inside coil schematic diagram.
In figure, 1- hydraulic cylinder；2- crescent gear pump；3- servo motor；4- controller；5- rectifier；6- battery；7-
Fuel tank；8- armature winding；9- excitation winding.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection scope.
As depicted in figs. 1 and 2, the present invention includes hydraulic cylinder 1, crescent gear pump 2, servo motor 3, controller 4, rectification
Device 5, energy storage device 6 and fuel tank 7：Controller 4 is connected with the control terminal of servo motor 3, controls servo motor 3 during feed liquor
The parameters such as revolving speed；The output shaft of servo motor 3 and the input shaft of crescent gear pump 2 are mechanically connected, and are realized and are rotated synchronously；It is whole
Stream 5 both ends of device are connected with servo motor 3, energy storage device 6 respectively, and rectifier 5 leads to the alternating current of output during oil return
Over commutation device 5 is rectified into direct current, realizes the recycling that electric energy is exported to servo motor 3；2 oil circuit one end of crescent gear pump
It is connected with hydraulic cylinder 1 by oil pipe, realizes oil inlet and oil return process；The 2 oil circuit other end of crescent gear pump and fuel tank 7 pass through oil
Pipe is connected, and recycles oil liquid in the process for providing oil liquid and oil return during oil inlet.
5 input terminal of fairing is connected with servo motor 3, the AC rectification Cheng Zhi for exporting servo motor 3
Galvanic electricity；5 output end of fairing is connected with energy storage device 6, for by the storage of the electric energy of direct current be recovered in energy storage device 6 with
It recycles.
In specific implementation, energy storage device 6 is selected as battery, fairing 5 rectify after charged with direct current to battery with
It is used to subsequent power supply.
As depicted in figs. 1 and 2, it is equipped with switch between controller 4 and the connection of servo motor 3, switchs and closes during oil inlet
It closes, controller 4 controls servo motor 3 and rotates；It switchs and disconnects during oil return, servo motor 3 is driven by crescent gear pump 2
Rotation.
As shown in Figure 1, servo motor 3 is used as motor, crescent gear pump 2 by external power grid power supply during oil inlet
It drives rotation to be used as hydraulic pump by servo motor 3, is pumped into oil liquid into hydraulic cylinder 1.
As shown in Fig. 2, servo motor 3 is output to the outside electric current as generator, crescent gear pump during oil return
2 are used as hydraulic motor by the oil liquid driving between hydraulic cylinder 1 and fuel tank 7, drive the reversion power generation of servo motor 3.
As shown in figure 3, servo motor 3 is internally provided with armature winding 8 and excitation winding 9.Armature winding 8 and excitation winding
9 nothings are connected directly；Armature winding 8 is connected during oil inlet with external power grid, is directly powered by external power grid and makees motor；Oil return
8 both ends of armature winding make output end and are connected with rectifier in journey, and output electric current makees generator, and Vf indicates instantaneous motional electromotive force；
9 both ends of excitation winding are through adjustable resistance R connection external dc power U, the exciting current I of excitation winding 9aBy external dc power
U is provided, and is divided by adjustable resistance R and is quickly adjusted exciting current size.
During oil return, need to guarantee that oil liquid is discharged with constant pressure, so during oil return, by by excitation
Excitation winding in servo motor 3 is accessed with partial pressure method as shown in Figure 3, to achieve the purpose that control the size of exciting current.
The size of exciting current determines the size for the magnetic torque that excitation winding provides, and since servo motor is defeated with crescent gear pump
Shaft is connected with mechanical structure, therefore the size of the magnetic torque should be identical as the output torque size of crescent gear pump, and is exported
Torque is determined that therefore, which has reached the size by controlling exciting current to control magnetic torque, tooth by the pressure of oil liquid
Wheel pump output torque finally reaches the purpose that control oil liquid is discharged with constant pressure.
The course of work of the invention is as follows：
As shown in Figure 1, servo motor 3 provides electric energy by external power grid during oil inlet, close the switch, in the control of controller 4
Make motor under system, drive crescent gear pump 2 to rotate according to given parameters, crescent gear pump 2 makees hydraulic pump, by oil liquid from
Hydraulic cylinder 1 is pumped into fuel tank 7, hydraulic die cushion rises.
During above-mentioned oil inlet, energy variation process is as follows：The electric energy that external power grid provides is converted at servo motor 3
Mechanical energy simultaneously passes to crescent gear pump 2, and mechanical energy is converted into the hydraulic energy of oil liquid and makes hydraulic at crescent gear pump
Pad rises, and externally does work.
As shown in Fig. 2, switching and disconnecting first between controller 4 and servo motor 3, hydraulic die cushion is in external force F during oil return
Acting under begin to decline, and oil liquid is discharged by oil pipe, drives crescent gear pump 2 to rotate backward, internal messing tooth at this time
Wheel pump 2 makees hydraulic motor, under oil liquid driving, drives servo motor 3 to rotate backward by mechanical structure, servo motor is made at this time
Generator is stored in battery 6 in output end output alternating current to rectifier 5 after rectified.
During above-mentioned oil return, energy variation is as follows：External force does work to hydraulic cylinder and oil liquid is discharged first, in interior engaging tooth
Hydraulic energy transfer is mechanical energy at wheel pump 2, and is passed at servo motor 3, and by electromagnetic induction principle, mechanical energy is converted into electricity
It can export, final electrotransformation is that the chemical energy in battery 6 is utilized in case of next time, realizes the energy in hydraulic cylinder return stroke
Recovering effect.
Further, during oil return, the pressure of oil liquid discharge should be constant and adjustable.
When making generator according to servo motor 3, the liquid of electromagnetic torque suffered by Inside coil and the offer of crescent gear pump 2
The correlation theories such as the equal condition of pressure square and the law of electromagnetic induction can derive 1 pressure Q of hydraulic cylinder and servo motor
In exciting current IaRelationship be：
Wherein, k is constant, with motor speed, hot-wire coil radius, Coil resistance, oiler radius, the parameters such as eccentricity
It is related.
Therefore the pressure size of the i.e. controllable fuel-displaced process of hydraulic cylinder of exciting current size need to only be controlled.It is encouraged for convenience of control
Magnetoelectricity stream, the servo motor 3 select separate excitation type servo motor.
As shown in figure 3, the armature winding 8 and excitation winding 9 of the separate excitation type servo motor of special adaptations of the present invention are without direct
It is connected, exciting current IaIt is provided by additional dc power supply, and can be convenient by bleeder circuit form and rapidly adjust excitation electricity
Flow size.
The present invention by making hydraulic pump and hydraulic motor, sepanatedexciting servo electricity using crescent gear pump positive and negative rotation respectively
The characteristic for making motor and generator when machine positive and negative rotation respectively is carried out to by the engineering hydraulic device of representative of hydraulic press hydraulic cylinder
Transformation, while realizing energy regenerating effect, small with changing to original hydraulic device, improvement cost is lower, and universality is stronger
The advantages that, the development prospect with wide popularization and application.
Claims (6)
1. a kind of hydraulic cushion of hydraulic press device with energy recovery function, it is characterised in that：Including hydraulic cylinder (1), internal messing
Gear pump (2), servo motor (3), controller (4), fairing (5), energy storage device (6) and fuel tank (7)：The controller
(4) it is connected with the control terminal of servo motor (3), the output shaft of the servo motor (3) and the input shaft of crescent gear pump (2)
Mechanical connection is realized and is rotated synchronously；Fairing (5) both ends are connected with servo motor (3), energy storage device (6) respectively, real
Now to the recycling of servo motor (3) output electric energy；Described crescent gear pump (2) oil circuit one end passes through with hydraulic cylinder (1)
Oil pipe is connected, and realizes oil inlet and oil return process；Crescent gear pump (2) the oil circuit other end passes through oil pipe phase with fuel tank (7)
Even, oil liquid is recycled in the process for providing oil liquid and oil return during oil inlet.
2. a kind of hydraulic cushion of hydraulic press device with energy recovery function according to claim 1, it is characterised in that：Institute
The controller (4) stated is equipped with switch between connecting with servo motor (3), closes the switch during oil inlet, controller (4) control
Servo motor (3) rotation；It switchs and disconnects during oil return, servo motor (3) is driven by crescent gear pump (2) and rotated.
3. a kind of hydraulic cushion of hydraulic press device with energy recovery function according to claim 2, it is characterised in that：?
During oil inlet, servo motor (3) is used as motor by external power grid power supply, and crescent gear pump (2) is driven by servo motor (3)
Rotation is used as hydraulic pump, is pumped into oil liquid into hydraulic cylinder (1)；During oil return, servo motor (3) is output to the outside electric current work
For generator, crescent gear pump (2) is used as hydraulic motor by the oil liquid driving between hydraulic cylinder (1) and fuel tank (7), and drive is watched
Take motor (3) reversion power generation.
4. a kind of hydraulic cushion of hydraulic press device with energy recovery function according to claim 1, it is characterised in that：Institute
The energy storage device (6) stated is selected as battery, and the charged with direct current after fairing (5) rectification to battery to subsequent power supply to make
With.
5. a kind of hydraulic cushion of hydraulic press device with energy recovery function according to claim 1, it is characterised in that：Institute
The servo motor (3) stated uses separated exciting DC servo motor.
6. a kind of hydraulic cushion of hydraulic press device with energy recovery function, feature exist according to claim 1 or 5
In：The servo motor (3) is internally provided with armature winding (8) and excitation winding (9), armature winding (8) and excitation winding
(9) without being connected directly, excitation winding (9) both ends are through adjustable resistance R connection external dc power U, the excitation electricity of excitation winding (9)
Flow IaIt is provided by external dc power U, is divided by adjustable resistance R and quickly adjust exciting current size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810639394.3A CN108869462A (en) | 2018-06-20 | 2018-06-20 | A kind of hydraulic cushion of hydraulic press device with energy recovery function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810639394.3A CN108869462A (en) | 2018-06-20 | 2018-06-20 | A kind of hydraulic cushion of hydraulic press device with energy recovery function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108869462A true CN108869462A (en) | 2018-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810639394.3A Pending CN108869462A (en) | 2018-06-20 | 2018-06-20 | A kind of hydraulic cushion of hydraulic press device with energy recovery function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112271961A (en) * | 2020-10-15 | 2021-01-26 | 珠海格力电器股份有限公司 | Motor starting system and method and electric equipment with motor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190161A (en) * | 1996-10-25 | 1998-08-12 | 戴姆勒－奔驰航天空中客车公司 | Power changing system for two-way changing between hydraulic energy and electric energy |
| CN101408213A (en) * | 2008-11-11 | 2009-04-15 | 浙江大学 | Energy recovery system of hybrid power engineering machinery energy accumulator-hydraulic motor |
| CN104728219A (en) * | 2015-03-17 | 2015-06-24 | 长安大学 | Hydraulic pump testbed system with energy recovery function and energy recovery method |
| CN107524187A (en) * | 2017-09-15 | 2017-12-29 | 太原理工大学 | Rotary motion braking energy liquid electricity mixing recycling system |
| CN107986196A (en) * | 2017-10-19 | 2018-05-04 | 浙江大学 | A kind of electri forklift potential energy regenerating unit |
-
2018
- 2018-06-20 CN CN201810639394.3A patent/CN108869462A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190161A (en) * | 1996-10-25 | 1998-08-12 | 戴姆勒－奔驰航天空中客车公司 | Power changing system for two-way changing between hydraulic energy and electric energy |
| CN101408213A (en) * | 2008-11-11 | 2009-04-15 | 浙江大学 | Energy recovery system of hybrid power engineering machinery energy accumulator-hydraulic motor |
| CN104728219A (en) * | 2015-03-17 | 2015-06-24 | 长安大学 | Hydraulic pump testbed system with energy recovery function and energy recovery method |
| CN107524187A (en) * | 2017-09-15 | 2017-12-29 | 太原理工大学 | Rotary motion braking energy liquid electricity mixing recycling system |
| CN107986196A (en) * | 2017-10-19 | 2018-05-04 | 浙江大学 | A kind of electri forklift potential energy regenerating unit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112271961A (en) * | 2020-10-15 | 2021-01-26 | 珠海格力电器股份有限公司 | Motor starting system and method and electric equipment with motor |
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Application publication date: 20181123 |
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