CN107032265B - A kind of direct electric drive pump control energy conserving system for double mast forklift trucks - Google Patents
A kind of direct electric drive pump control energy conserving system for double mast forklift trucks Download PDFInfo
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- CN107032265B CN107032265B CN201710307970.XA CN201710307970A CN107032265B CN 107032265 B CN107032265 B CN 107032265B CN 201710307970 A CN201710307970 A CN 201710307970A CN 107032265 B CN107032265 B CN 107032265B
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- valve
- electric drive
- conserving system
- energy conserving
- hydraulic cylinder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/22—Hydraulic devices or systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/205—Arrangements for transmitting pneumatic, hydraulic or electric power to movable parts or devices
-
- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Transportation (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Analytical Chemistry (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The present invention relates to truck hydraulic energy-saving fields, more particularly to a kind of energy conserving system for double mast forklift trucks.It includes pump drive control component, control relief valve assembly, executive module and sensing control component.Pump drive control component includes host computer, connection panel, regenerative braking frequency converter, permasyn morot and hydraulic pump；It includes two-way normally closed promotion safety valve, three-position four-way electromagnetic directional valve and pressure reducing valve to control relief valve assembly；Executive module includes the first single-action hydraulic cylinder, flow distributing and collecting balanced valve and second single-action hydraulic cylinder etc..The invention has the advantages that：Two-door frame is in respective elevated areas lifter motion, using regenerative braking Frequency Converter Control to the frequency of supply of permasyn morot, the flow and pressure for making the hydraulic oil of permasyn morot driving hydraulic pump output match with the required flow pressure of real work, avoid unnecessary energy dissipation, capacity usage ratio is improved, the discharge of harmful substance is reduced.
Description
Technical field
The present invention relates to truck hydraulic energy-saving fields, more particularly to a kind of energy conserving system for double mast forklift trucks.
Background technology
In the walking type construction machineries such as fork truck, such as double mast forklift trucks, since inner upright mounting and outer mast undertake difference respectively
The liter of improvement stage lifts function, so inner upright mounting and the corresponding drive cylinder of outer mast have different lifting speed and different
Displacement.The hydraulic system energy utilization rate of double mast forklift trucks in the prior art is relatively low：1, in the uphill process of two door frames,
Flow, pressure and the required flow of the hydraulic circuit of real work, the pressure that cannot achieve hydraulic pump output match, and make
At the waste of energy；2, in order to ensure that two door frames are steadily declined with speed appropriate, the prior art often makes high-voltage oil liquid directly logical
Throttle valve restriction oil return box is crossed, the mode of this throttle grverning is easy that high-voltage oil liquid is made to generate big calorimetric in throttling process
Amount, causes oil temperature in hydraulic system to increase, causes the waste of energy, and be easy to cause the aged deterioration of Hydraulic Elements；3, Liang Men
Frame drives the motor of hydraulic pump to be in on-position during decline, the high-voltage oil liquid of return can also driving motor reversion, band
The kinetic energy of dynamic electric power generation, motor rotation is lost, and the high potential energy of two door frames in decline is also wasted.
Therefore, it for double mast forklift trucks, needs to design a kind of new hydraulic system, realize to inner upright mounting and outer mast not
It with the driving of improvement stage, and realizes the recycling of kinetic energy and potential energy, improves capacity usage ratio.
Invention content
The problem to be solved in the present invention provided aiming above insufficient it is a kind of for double mast forklift trucks can be to door frame
High potential energy and rotor energy carry out the energy conserving system of effective recycling.Its technical solution is as follows：
It includes pump drive control component, control relief valve assembly, executive module and sensing control component, key technology
It is：
The pump drive control component includes host computer, connection panel, regenerative braking frequency converter, permanent magnet synchronous motor and liquid
Press pump, host computer connect regenerative braking frequency converter by connecting panel, and regenerative braking frequency converter connects permanent magnet synchronous motor, permanent magnetism
Synchronous motor connects hydraulic pump；
The control relief valve assembly includes two-way normally closed promotion safety valve, three-position four-way electromagnetic directional valve and pressure reducing valve,
The oil inlet of the two-way normally closed oil inlet for promoting safety valve and pressure reducing valve is connected respectively to the oil outlet of hydraulic pump, two-way normally closed to carry
The oil outlet for rising safety valve is connected to the oil inlet of three-position four-way electromagnetic directional valve；
The executive module includes the first single-action hydraulic cylinder, flow distributing and collecting balanced valve and the second single-action hydraulic cylinder, institute
Two actuator ports for stating three-position four-way electromagnetic directional valve are separately connected the rodless cavity and flow distributing and collecting of the first single-action hydraulic cylinder
Balanced valve oil inlet, two oil outlets of flow distributing and collecting balanced valve are separately connected the rodless cavity of two the second single-action hydraulic cylinders,
First single-action hydraulic cylinder drives inner door frame of forklift truck, the second single-action hydraulic cylinder to drive outer portal frame of forklift；
The sensing control component includes first pressure sensor, second pressure sensor, the first SGW/SGI displacements coding
Oil outlet and two-way normally closed promotion peace in hydraulic pump is arranged in device and the 2nd SGW/SGI displacement encoders, first pressure sensor
On oil circuit between full valve oil inlet, the setting of second pressure sensor is in two-way normally closed promotion safety valve and 3-position 4-way electricity
On oil circuit between magnetic reversal valve, the 2nd SGW/SGI displacement encoders are connected to the oil inlet of the flow distributing and collecting balanced valve, the
One SGW/SGI displacement encoders are connected on the oil circuit between three-position four-way electromagnetic directional valve and the first single-action hydraulic cylinder；
Accumulator is connected on the two-way normally closed oil circuit promoted between safety valve and three-position four-way electromagnetic directional valve.
Further, regenerative braking frequency converter includes braking resistor R in parallelbrakeWith storing up electricity capacitance in parallel；
Further, regenerative braking frequency converter passes through phase current probe and phase voltage probe connection permanent magnet synchronous motor.
Further, permanent magnet synchronous motor carries rotary transformer.
Further, first pressure sensor is also connect with pressure reducing valve.
Further, first pressure sensor, second pressure sensor, the 2nd SGW/SGI displacement encoders and the first SGW/
SGI displacement encoders are all connected on connection panel.
Further, host computer has dspace module and programmable computer controller.
Further, accumulator is spring accumul ator or diaphragm accumulator.
Further, braking resistor RbrakeRealize that break-make controls using switch.
Compared with prior art, the present invention has the advantages that：
1, two-door frame is in respective elevated areas lifter motion, using regenerative braking Frequency Converter Control to permanent magnet synchronous electric
The frequency of supply of machine makes required for flow and pressure and the real work of the hydraulic oil of permanent magnet synchronous motor driving hydraulic pump output
Flow pressure match, avoid unnecessary energy dissipation, improve capacity usage ratio, reduce the discharge of harmful substance.
2, when two-door frame declines, the first single-action hydraulic cylinder of accumulator pair and the second single-action hydraulic cylinder mesohigh are utilized
The pressure energy of fluid carries out recycling storage；Permanent magnet synchronous motor is braked, and high-voltage oil liquid pushes hydraulic pump reversion to be used as liquid
Pressure motor pushes permanent magnet synchronous motor rotation, permanent magnet synchronous motor power generation to generate regenerative electric energy, can utilize regenerative braking frequency conversion
Device uses energy-consumption braking, and the regenerative electric energy generated using braking resistor consumption permanent magnet synchronous motor reversion makes DC voltage UDCPlace
In normal condition, regenerative braking frequency converter is protected, the regeneration that storage capacitor can also be utilized to generate permanent magnet synchronous motor reversion
Power storage is powered to permanent magnet synchronous motor as accessory power supply, is conducive to energy saving when door frame rises；
3, when two-door frame declines, after the speed governing of regenerative braking frequency converter and dropping valve antihypertensive effect, high-voltage oil liquid
Fuel tank is returned, the heat that traditional throttle grverning generates is avoided, and brings the raising of oil liquid temperature and the waste of energy.
Description of the drawings
Fig. 1, for the direct electric drive pump control energy conserving system figure for double mast forklift trucks of the present invention.
Specific implementation mode
As shown in Figure 1, the present invention includes pump drive control component, control relief valve assembly, executive module and sensing control
Component, key technology are：
The pump drive control component includes host computer 1, connection panel 2, regenerative braking frequency converter 3, band rotary transformer
Permanent magnet synchronous motor 4 and hydraulic pump 5, host computer 1, which passes through, to be connected panel 2 and connects regenerative braking frequency converter 3, regenerative braking frequency conversion
The permanent magnet synchronous motor 4 of the phase current probe 18 and phase voltage 19 connect band rotary transformers of probe of device 3, with rotary transformer
Permanent magnet synchronous motor 4 connects hydraulic pump 5 by shaft coupling；
The control relief valve assembly includes two-way normally closed promotion safety valve 6, three-position four-way electromagnetic directional valve 7 and pressure reducing valve
11, the oil inlet of the two-way normally closed oil inlet for promoting safety valve 6 and pressure reducing valve 11 is connected respectively to the oil outlet of hydraulic pump 5, double
It is connected to the normally closed oil outlet for promoting safety valve 6 with the oil inlet of three-position four-way electromagnetic directional valve 7；
The executive module includes first single-action hydraulic cylinder 8, flow distributing and collecting balanced valve 9 and two the second single-actings
Hydraulic cylinder 10, two actuator ports of the three-position four-way electromagnetic directional valve 7 be separately connected the first single-action hydraulic cylinder 8 without bar
Two oil outlets of 9 oil inlet of chamber and flow distributing and collecting balanced valve, flow distributing and collecting balanced valve 9 are separately connected two the second single-acting liquid
The rodless cavity of cylinder pressure 10, first single-action hydraulic cylinder 8 drive inner door frame of forklift truck, and the inner upright mounting of fork truck is in the first lifting region
Interior movement, the second single-action hydraulic cylinder 10 drive stablizing for outer portal frame of forklift to rise, and the outer mast of fork truck is in the second lifting region
Interior movement；
The sensing control component includes first pressure sensor 13, second pressure sensor 14, the first SGW/SGI displacements
Encoder 21 and the 2nd SGW/SGI displacement encoders 15, first pressure sensor 13 are arranged in the oil outlet of hydraulic pump 5 and two-way
On the normally closed oil circuit promoted between 6 oil inlet of safety valve, first pressure sensor 13 is also connect with pressure reducing valve 11, and second pressure passes
Sensor 14 is arranged on the two-way normally closed oil circuit promoted between safety valve 6 and the three-position four-way electromagnetic directional valve 7, the 2nd SGW/
SGI displacement encoders 15 are connected to the oil inlet of the flow distributing and collecting balanced valve 9, the connection of the first SGW/SGI displacement encoders 21
On oil circuit between three-position four-way electromagnetic directional valve 7 and the first single-action hydraulic cylinder 8, first pressure sensor 13, second is pressed
Force snesor 14, the 2nd SGW/SGI displacement encoders 15 and the first SGW/SGI displacement encoders 21 are all connected to connection panel 2
On；
Accumulator 20 is connected on the two-way normally closed oil circuit promoted between safety valve 6 and three-position four-way electromagnetic directional valve 7.
Further, regenerative braking frequency converter 3 includes braking resistor R in parallelbrake16 and storing up electricity capacitance in parallel, braking electricity
Hinder Rbrake16 realize that break-make controls using switch
Further, host computer 1 has dspace module and programmable computer controller.
Further, accumulator 20 is spring accumul ator or diaphragm accumulator.
The direct electric drive pump control main course of work of energy conserving system that the present invention is used for double mast forklift trucks is as follows：
1, for two-door frame in respective elevated areas lifter motion, host computer 1 opens three-phase alternating-current supply, and is made to regeneration
Dynamic frequency converter 3 sends out control instruction, using the control of regenerative braking frequency converter 3 to the frequency of supply of permanent magnet synchronous motor 4, makes permanent magnetism
Synchronous motor 4 drives the flow of the hydraulic oil of the output of hydraulic pump 5 and pressure to match with the required flow pressure of real work,
The first single-action hydraulic cylinder 8 is driven to rise in the first elevated areas；Then, three-position four-way electromagnetic directional valve 7 is adjusted, then is driven
Second single-action hydraulic cylinder 10 rises in the second elevated areas, avoids unnecessary energy dissipation, improves capacity usage ratio.
2, when two-door frame declines, using accumulator 20 to the first single-action hydraulic cylinder 8 and the second single-action hydraulic cylinder 10
The pressure energy of mesohigh fluid carries out recycling storage；Power supply stops powering to permanent magnet synchronous motor 4, is in the permanent magnetism of on-position
Synchronous electric motor rotor will produce electric energy at this time since effect of inertia is rotating, and a high-voltage oil liquid part is returned through pressure reducing valve 11
Fuel tank is flowed to, another part drives hydraulic pump 5 to be inverted as motor, drives permanent magnet synchronous motor 4 to rotate, at this time permanent magnet synchronous electric
Machine 4 is equivalent to generator, and the power generation of permanent magnet synchronous motor 4 generates regenerative electric energy can connect system in parallel when needing fast braking
Dynamic resistance RbrakeSwitch, using regenerative braking frequency converter use energy-consumption braking, permanent magnet synchronous motor 4 generate regenerative electric energy turn
Turn to braking resistor RbrakeHeat, while permanent-magnetic synchronous motor rotor is utilized braking resistor to consume permanent-magnet synchronous by dynamic braking
The regenerative electric energy that the rotation of motor 4 generates, makes DC voltage UDC17 are in normal condition, protection regenerative braking frequency converter 3；If electric
The stability in source is preferable, when door frame declines, can disconnect the control switch of braking resistor, the friendship that permanent magnet synchronous motor rotation generates
Galvanic electricity AC, inversion are direct current DC, store the regenerative electric energy that permanent magnet synchronous motor reversion generates using storage capacitor, work as goalkeeper
When rising, direct current DC inversions are alternating current AC, and storage capacitor is powered as accessory power supply to permanent magnet synchronous motor, and energy is conducive to
The recycling of amount.
3, when two-door frame declines, the high pressure of accumulator 20 recycling storage the first single-acting cylinder 8 and the second single-acting cylinder 10
The pressure energy of fluid, when door frame rises again, accumulator 20 makees auxiliary drive, to the first single-acting cylinder 8 and the second single-acting
The high-voltage oil liquid of cylinder 10 provides pressure oil, realizes the recycling of energy, the speed governing using regenerative braking frequency converter and pressure reducing valve
Antihypertensive effect, high-voltage oil liquid returns to fuel tank, avoids the heat that traditional throttle grverning generates, and brings the liter of oil liquid temperature
The high and damage to Hydraulic Elements.
4, during door frame rise and fall, first pressure sensor 13, second pressure sensor 14 are respectively to connection
Panel 2 transmits collected pressure signal, and SGW/SGI displacement encoders 15,21 are transmitted to connection panel 2 in collected respectively
In the displacement signal of the first, second lifting region, host computer acquires these signals for door frame, outer mast, is made to regeneration by processing
Dynamic frequency converter 3 sends out accurate control instruction.
12 be hydraulic oil container in figure.
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；Although with reference to preferred embodiment pair
The present invention is described in detail, those of ordinary skills in the art should understand that：It still can be to the specific of the present invention
Embodiment modifies or carries out equivalent replacement to some technical characteristics；Without departing from the spirit of the technical scheme of the invention,
It should all cover within the scope of the technical scheme claimed by the invention.
Claims (9)
1. a kind of direct electric drive pump control energy conserving system for double mast forklift trucks, including pump drive control component, control safety
Valve module, executive module and sensing control component, it is characterised in that：
The pump drive control component includes host computer (1), connection panel (2), regenerative braking frequency converter (3), permanent magnet synchronous electric
Machine (4) and hydraulic pump (5), host computer (1) connect regenerative braking frequency converter (3), regenerative braking frequency converter by connecting panel (2)
(3) connection permanent magnet synchronous motor (4), permanent magnet synchronous motor (4) connect hydraulic pump (5)；
The control relief valve assembly includes two-way normally closed promotion safety valve (6), three-position four-way electromagnetic directional valve (7) and pressure reducing valve
(11), the oil inlet of the two-way normally closed oil inlet for promoting safety valve (6) and pressure reducing valve (11) is connected respectively to going out for hydraulic pump (5)
Hydraulic fluid port, the two-way normally closed oil outlet for promoting safety valve (6) are connected to the oil inlet of three-position four-way electromagnetic directional valve (7)；
The executive module includes the first single-action hydraulic cylinder (8), flow distributing and collecting balanced valve (9) and the second single-action hydraulic cylinder
(10), two actuator ports of the three-position four-way electromagnetic directional valve (7) be separately connected the first single-action hydraulic cylinder (8) without bar
Chamber and flow distributing and collecting balanced valve (9) oil inlet, two oil outlets of flow distributing and collecting balanced valve (9) are separately connected two the second nonocultures
With the rodless cavity of hydraulic cylinder (10), first single-action hydraulic cylinder (8) drives inner door frame of forklift truck, the second single-action hydraulic cylinder
(10) outer portal frame of forklift is driven；
The sensing control component includes first pressure sensor (13), second pressure sensor (14), the first SGW/SGI displacements
Encoder (21) and the 2nd SGW/SGI displacement encoders (15), first pressure sensor (13) are arranged in the fuel-displaced of hydraulic pump (5)
On the two-way normally closed oil circuit promoted between safety valve (6) oil inlet, second pressure sensor (14) is arranged two-way normally closed mouth
It is promoted on the oil circuit between safety valve (6) and the three-position four-way electromagnetic directional valve (7), the 2nd SGW/SGI displacement encoders
(15) it is connected to the oil inlet of the flow distributing and collecting balanced valve (9), the first SGW/SGI displacement encoders (21) are connected to three four
On oil circuit between electric change valve (7) and the first single-action hydraulic cylinder (8)；
Accumulator is connected on the two-way normally closed oil circuit promoted between safety valve (6) and three-position four-way electromagnetic directional valve (7)
(20)。
2. the direct electric drive pump control energy conserving system according to claim 1 for double mast forklift trucks, it is characterised in that again
Raw brake variable-frequency device (3) includes the braking resistor R of parallel connectionbrake(16) and storing up electricity capacitance in parallel.
3. the direct electric drive pump control energy conserving system according to claim 1 for double mast forklift trucks, it is characterised in that again
Raw brake variable-frequency device (3) connects permanent magnet synchronous motor (4) by phase current probe (18) and phase voltage probe (19).
4. the direct electric drive pump control energy conserving system according to claim 1 for double mast forklift trucks, it is characterised in that forever
Magnetic-synchro motor (4) carries rotary transformer.
5. the direct electric drive pump control energy conserving system according to claim 1 for double mast forklift trucks, it is characterised in that the
One pressure sensor (13) is also connect with pressure reducing valve (11).
6. the direct electric drive pump control energy conserving system according to claim 1 for double mast forklift trucks, it is characterised in that the
One pressure sensor (13), second pressure sensor (14), the 2nd SGW/SGI displacement encoders (15) and the first SGW/SGI
Encoder (21) is moved to be all connected on connection panel (2).
7. the direct electric drive pump control energy conserving system according to claim 1 for double mast forklift trucks, it is characterised in that on
Position machine (1) has dspace module and programmable computer controller.
8. the direct electric drive pump control energy conserving system according to claim 1 for double mast forklift trucks, it is characterised in that store
Energy device (20) is spring accumul ator or diaphragm accumulator.
9. the direct electric drive pump control energy conserving system according to claim 2 for double mast forklift trucks, it is characterised in that system
Dynamic resistance RbrakeRealize that break-make controls using switch.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710307970.XA CN107032265B (en) | 2017-05-04 | 2017-05-04 | A kind of direct electric drive pump control energy conserving system for double mast forklift trucks |
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| CN201710307970.XA CN107032265B (en) | 2017-05-04 | 2017-05-04 | A kind of direct electric drive pump control energy conserving system for double mast forklift trucks |
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| Publication Number | Publication Date |
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| CN107032265A CN107032265A (en) | 2017-08-11 |
| CN107032265B true CN107032265B (en) | 2018-11-09 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107416736A (en) * | 2017-08-28 | 2017-12-01 | 成都翰道科技有限公司 | A kind of hydraulic forklift adjusting means |
| CN107906063B (en) * | 2017-12-03 | 2024-05-14 | 长沙汽电汽车零部件有限公司 | Lifting operation equipment and power system thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH112212A (en) * | 1997-06-13 | 1999-01-06 | Tokimec Inc | Lift driving device for heavy object |
| CN100364879C (en) * | 2004-03-01 | 2008-01-30 | 上海市闸北区物流工程技术研究所 | Energy-saving electrocar for loading unloading and transporting |
| JP2006117406A (en) * | 2004-10-22 | 2006-05-11 | Mitsubishi Heavy Ind Ltd | Hydraulic device of battery type industrial vehicle |
| CN100386254C (en) * | 2006-03-31 | 2008-05-07 | 西安交通大学 | Electric fork track lifting control system possessing energy recovery device |
| CN202609873U (en) * | 2012-03-23 | 2012-12-19 | 三一集团有限公司 | Oil-electricity hybrid motive power stacking machine |
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