CN109131547A - Moving cell and control method are made in a kind of steering of integrated electrical liquid - Google Patents
Moving cell and control method are made in a kind of steering of integrated electrical liquid Download PDFInfo
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- CN109131547A CN109131547A CN201811270772.1A CN201811270772A CN109131547A CN 109131547 A CN109131547 A CN 109131547A CN 201811270772 A CN201811270772 A CN 201811270772A CN 109131547 A CN109131547 A CN 109131547A
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- oil
- oil cylinder
- double
- cylinder
- servo motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/062—Details, component parts
- B62D5/064—Pump driven independently from vehicle engine, e.g. electric driven pump
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/09—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by means for actuating valves
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Moving cell and control method, the rotation direction and revolving speed of externally input control signal control bilateral servo motor are made in a kind of steering of integrated electrical liquid, and bilateral servo motor driven executes the stretching direction of oil cylinder and stretches out speed.Control valve block assembly, when stopping working for bilateral servo motor, when executing the movement position holding of oil cylinder, and can be used in executing oil cylinder extending action, oil return side oil liquid returns to sealed reservoir heat dissipation, reduces the temperature of oil liquid；Control valve block assembly can be when executing oil cylinder temperature or load sudden change, and limitation executes cylinder efficient pressure, and for setting double-direction gearpump maximum working pressure, limits the output power of double-direction gearpump, prevent bilateral servo motor overload；Control valve block assembly, which can be realized, executes the connection of two chamber of oil cylinder in floating working condition, improves integrated electrical liquid and turns to and makees the safety that moving cell emergency operating condition turns to work.
Description
Technical field
The present invention relates to a kind of steerings of integrated electrical liquid to make moving cell and control method, belongs to hydraulic drive and control technology
Field.
Background technique
Currently, New Generation of Intelligent special vehicle uses full electric drive, steering system has full turning function, and can
The functions such as a variety of steering patterns and failure monitoring are realized, to meet the steering demand under various complex working conditions, existing steering liquid
System structure bulky complex is pressed, steering pattern is single, cannot realize the switching of multi-steering mode according to requirements, cannot adopt
With electric drive mode, is no longer satisfied New Generation of Intelligent special vehicle and turns to demand.
Summary of the invention
Present invention solves the technical problem that are as follows: it overcomes the shortage of prior art, a kind of integrated electrical liquid steering actuation list is provided
Member and control method, using electric drive mode, the left and right wheels of each axle independently drive by single electro-hydraulic moving cell of making, real
Existing intelligent special vehicle is taken turns independent driving entirely and is turned to, and solves the problems, such as multi-mode steering；Simultaneously by complicated steering system letter
The module of chemical conversion " moving cell is made in novel electro-hydraulic integrated steering " is built, and realizes any shafting turning function of intelligent special vehicle
Modularization and rapid design.
The technical solution that the present invention solves are as follows: moving cell is made in a kind of steering of integrated electrical liquid, comprising: bilateral servo motor,
Double-direction gearpump executes oil cylinder (preferably double outlet-rod hydraulic cylinders), transmission shaft, sealed reservoir, control valve block assembly；
The rotation direction and revolving speed of externally input control signal control bilateral servo motor, bilateral servo motor pass through transmission shaft
Double-direction gearpump is driven to export oil liquid flow, to drive the stretching direction for executing oil cylinder (double outlet-rod hydraulic cylinders) and stretch out speed
Degree.
Control valve block assembly, when stopping working for bilateral servo motor, the movement position for executing oil cylinder is kept, and can
When stretching receipts movement for executing oil cylinder, oil return side oil liquid returns to sealed reservoir heat dissipation, reduces the temperature of oil liquid；Control valve block assembly
It can be when executing the raising of oil cylinder temperature or load sudden change, limitation executes cylinder efficient pressure, and for setting double-direction gearpump
Maximum working pressure limits the output power of double-direction gearpump, prevents bilateral servo motor overload；Control valve block assembly can be real
It now executes the connection of two chamber of oil cylinder and is in floating working condition, improve the reliability of work.
Control valve block assembly, comprising: valve body, check valve, overflow valve, hydraulic control one-way valve, solenoid directional control valve；
Check valve, overflow valve, hydraulic control one-way valve, solenoid directional control valve are mounted in valve body；
Two hydraulic fluid ports of double-direction gearpump are provided with overflow valve, for setting oil sources maximum working pressure, limit bi-directional teeth
The output power of wheel pump prevents bilateral servo motor overload；
Two hydraulic fluid ports for executing oil cylinder are provided with overflow valve, can be when executing the raising of oil cylinder temperature or load sudden change, limit
System executes cylinder efficient pressure；
Sealed reservoir to two hydraulic fluid port of double-direction gearpump is respectively provided with check valve, realizes that double-direction gearpump is unidirectionally built pressure and inhaled
The normal switching of oily function.
Two chambers for executing oil cylinder are respectively provided with hydraulic control one-way valve, when stretching receipts movement for executing oil cylinder, oil return side oil
Liquid returns to sealed reservoir heat dissipation, reduces the temperature of cycle operation oil liquid.
Execute and be provided with solenoid directional control valve between two chambers of oil cylinder, must not electricity when, disconnect and execute two of oil cylinder work
Chamber；When obtaining electric, two working chambers that will execute oil cylinder are connected to, for realizing and executing two chamber connectivity part of oil cylinder under operating condition of meeting an urgent need
In floating working condition.
Floating working condition are as follows: when solenoid directional control valve obtains electric in control valve block assembly, execute oil cylinder under load effect
Movement can be followed.
Emergency operating condition, comprising: bilateral servo motor failure or double-direction gearpump failure.
The electric energy of bilateral servo motor output is converted to the pressure energy of oil sources by double-direction gearpump, is held by Oil-source control
Row oil cylinder extends and retracts movement.
Oil cylinder is executed using double outlet-rod hydraulic cylinders, including two oil pockets, is gone out by another chamber oil return realization pair of a chamber oil inlet
Bar piston in hydraulic cylinder bar one-way movement.
Double outlet-rod hydraulic cylinders, comprising: cylinder barrel, piston rod, end cap, trunnion, pedestal；
Cylinder barrel and pedestal are connected, and piston rod passes through the end cap of cylinder barrel and cylinder barrel both ends；Cylinder barrel is divided into two parts by piston rod,
Two oil pockets of stroke, trunnion are arranged in the both ends of piston rod, connect with external loading.
Sealed reservoir is closed type hydraulic oil tank, using closed type structure, it is ensured that integrated electrical liquid steering make moving cell it is in office what
Under operating attitude, double-direction gearpump has good oil absorption capacity.
Bilateral servo motor, double-direction gearpump, transmission shaft, sealed reservoir, control valve block assembly composition power unit with
It executes oil cylinder and uses modularization, power unit can be become one with oil cylinder is executed by being spirally connected, also can be empty according to installation
Between it is arranged apart, connected by exterior line.
Power unit and execution oil cylinder parallel arrangement, effectively reduce axial arrangement space.
A kind of integrated electrical liquid of the present invention turns to (quick condition) control method for making moving cell, it is characterised in that step is such as
Under
(1) bilateral servo motor moves right execution oil cylinder:
(2) bilateral servo motor moves downward execution oil cylinder:
(3) after bilateral servo motor stops, by check valve 3.3,3.4, hydraulic control one-way valve 4.1,4.2, overflow valve 5.3,
5.4 realize that hydraulic cylinder piston rod position is kept, and the maximum pressure of two chamber of hydraulic cylinder is set by overflow valve 5.3,5.4.
(4) after motor stops, when solenoid directional control valve 6 obtains electric, left and right two chamber for executing oil cylinder is linked up, in the effect of external force
Under, realize actuator quick condition.
The advantages of the present invention over the prior art are that:
(1) present invention makees moving cell using integrated electrical liquid steering in special vehicle chassis steering system, can save each
Complicated steering gear connection structure between group vehicle bridge, compared with the steering that conventional steering hydraulic system can accordingly save hydraulic oil source, each bridge
Oil cylinder, all kinds of control valve members, numerous fluid pressure lines, additionally it is possible to the probability for reducing steering hydraulic system evaporating, emitting, dripping or leaking of liquid or gas, using collection
It is significant that moving cell advantage is made in the electro-hydraulic steering of an accepted way of doing sth.
(2) present invention makees the oil sources of moving cell and executes oil cylinder run-in index to arrange by turning to integrated electrical liquid, effectively
Axial arrangement space is reduced, is easily installed.
(3) present invention, which makees in moving cell modular power unit and execution oil cylinder by integrated electrical liquid steering, to lead to
It crosses to be spirally connected and become one, also can be arranged apart according to installation space, it is connected by exterior line, mounting means is flexible.
(4) it is closed type hydraulic oil tank that the present invention, which makees tank design in moving cell by integrated electrical liquid steering, using enclosed
Structure, it is ensured that integrated electrical liquid steering is made under moving cell what operating attitude in office, and double-direction gearpump has good oil absorption capacity,
It effectively prevent fifth wheel to enter system simultaneously.
(5) present invention is turned to by integrated electrical liquid and is changed between two chambers for making to execute oil cylinder in moving cell provided with electromagnetism
To valve, under operating condition of meet an urgent need, solenoid directional control valve obtains electric, realizes and executes the connection of two chamber of oil cylinder in floating working condition,
Vehicle wheel alignment may be implemented under outer active force, effectively improve the safety of steering.
Detailed description of the invention
Fig. 1 is that moving cell hydraulic schematic diagram is made in integrated electrical liquid steering.
Fig. 2 is that integrated electrical liquid turns to actuation cellular construction figure.
Specific embodiment
The invention will be described in further detail in the following with reference to the drawings and specific embodiments.
Moving cell and control method are made in a kind of present invention integrated electrical liquid steering, as moving cell include: bilateral servo motor,
Double-direction gearpump executes oil cylinder, transmission shaft, sealed reservoir, control valve block assembly；Externally input control signal control is two-way to be watched
The rotation direction and revolving speed of motor are taken, bilateral servo motor drives double-direction gearpump to export oil liquid flow by transmission shaft, to drive
It executes the stretching direction of oil cylinder and stretches out speed.Control valve block assembly when stopping working for bilateral servo motor, executes oil cylinder
Movement position keep, and can be used in execute oil cylinder extending action when, oil return side oil liquid return to sealed reservoir heat dissipation, reduce oil
The temperature of liquid；Control valve block assembly can be when executing oil cylinder temperature or load sudden change, and limitation executes cylinder efficient pressure, is used in combination
In setting double-direction gearpump maximum working pressure, the output power of double-direction gearpump is limited, bilateral servo motor overload is prevented；Control
Valve block assembly processed, which can be realized, executes the connection of two chamber of oil cylinder in floating working condition, improves integrated electrical liquid and turns to actuation list
Member emergency operating condition turns to the safety of work.
The present invention provides a kind of steering of integrated electrical liquid and makees moving cell, can be used in special vehicle steering system, uses
Electric drive mode, the left and right wheels of each axle, which turn to swing arm and connect an integrated electrical liquid and turn to, makees moving cell execution oil cylinder
Two trunnions, by it is single it is electro-hydraulic make moving cell and independently drive, realize the independent driving steering of full wheel, solution special vehicle multi-mode
The problem of steering is of great significance to the overall performance for promoting Vehicular turn.
As shown in Fig. 2, moving cell is made in a kind of integrated electrical liquid steering of the present invention, comprising: bilateral servo motor, two-way gear
Pump executes oil cylinder (executing the preferably double outlet-rod hydraulic cylinders of oil cylinder), transmission shaft, sealed reservoir, control valve block assembly；
The rotation direction and revolving speed of externally input control signal control bilateral servo motor, bilateral servo motor pass through transmission shaft
Double-direction gearpump is driven to export oil liquid flow, to drive the stretching direction for executing oil cylinder (preferably double outlet-rod hydraulic cylinders) and stretching
Speed.
Control valve block assembly, comprising: valve body, check valve, overflow valve, hydraulic control one-way valve, solenoid directional control valve；Check valve overflows
Stream valve, hydraulic control one-way valve, solenoid directional control valve are mounted in valve body；Control valve block assembly stops working for bilateral servo motor
When, execute oil cylinder movement position keep, and can be used in execute oil cylinder stretch receipts movement when, oil return side oil liquid returns to sealed reservoir
Heat dissipation, reduces the temperature of oil liquid；Control valve block assembly can be when executing the raising of oil cylinder temperature or load sudden change, and limitation executes oil
Cylinder working pressure, and for setting double-direction gearpump maximum working pressure, the output power of double-direction gearpump is limited, is prevented two-way
Servo motor overload；Control valve block assembly, which can be realized, executes the connection of two chamber of oil cylinder in floating working condition, improves work
Reliability.
Two hydraulic fluid ports of double-direction gearpump are provided with overflow valve, for setting oil sources maximum working pressure, limit bi-directional teeth
The output power of wheel pump prevents bilateral servo motor overload；
Two hydraulic fluid ports for executing oil cylinder are provided with overflow valve, can be when executing the raising of oil cylinder temperature or load sudden change, limit
System executes cylinder efficient pressure；
Sealed reservoir to two hydraulic fluid port of double-direction gearpump is respectively provided with check valve, realizes that double-direction gearpump is unidirectionally built pressure and inhaled
The normal switching of oily function.
Two chambers for executing oil cylinder are respectively provided with hydraulic control one-way valve, when stretching receipts movement for executing oil cylinder, oil return side oil
Liquid returns to sealed reservoir heat dissipation, reduces the temperature of cycle operation oil liquid.
Execute and be provided with solenoid directional control valve between two chambers of oil cylinder, must not electricity when, disconnect and execute two of oil cylinder work
Chamber；When obtaining electric, two working chambers that will execute oil cylinder are connected to, for realizing and executing two chamber connectivity part of oil cylinder under operating condition of meeting an urgent need
In floating working condition.
Sealed reservoir is closed type hydraulic oil tank, using closed type structure, it is ensured that integrated electrical liquid steering make moving cell it is in office what
Under operating attitude, double-direction gearpump has good oil absorption capacity.
Bilateral servo motor, double-direction gearpump, transmission shaft, sealed reservoir, control valve block assembly composition power unit with
It executes oil cylinder and uses modularization, power unit can be become one with oil cylinder is executed by being spirally connected, also can be empty according to installation
Between it is arranged apart, connected by exterior line.
The present invention fully considers the limitation of special vehicle chassis installation space, and integrated electrical liquid is turned to and makees the dynamic of moving cell
Power unit and execution oil cylinder modularized design, can be become one the two by screw connection manner, also can be according to specific peace
It is arranged apart to fill space, is connected by exterior line, mounting means is flexible.Meanwhile by the way that integrated electrical liquid is turned to actuation list
The oil sources and execution oil cylinder run-in index arrangement of member, effectively reduce axial arrangement space, are easily installed.It is bilateral servo motor, two-way
Gear pump, transmission shaft, sealed reservoir, the power unit of control valve block assembly composition and execution oil cylinder use modularization, power list
Member can be become one with oil cylinder is executed by being spirally connected, also can be arranged apart according to installation space, be connected by exterior line
It connects.
As shown in Figure 1, moving cell, preferred embodiment are made in a kind of integrated electrical liquid steering of the invention are as follows: further include check valve
3.3, overflow valve 5.1, check valve 3.2, hydraulic control one-way valve 4.2, check valve 3.4, overflow valve 5.2, hydraulic control one-way valve 4.1, unidirectional
Valve 3.1, overflow valve 5.3, overflow valve 5.4, solenoid directional control valve 6
Execute oil cylinder (executing the preferably double outlet-rod hydraulic cylinders of oil cylinder) to move right: the reception of bilateral servo motor 9 moves right
Start after instruction, double-direction gearpump 8 exports oil liquid through check valve 3.3 to double 1 left chamber fuel feeding of outlet-rod hydraulic cylinder, and maximum thrust is by pumping
Outlet overflows valve 5.1 is set, and piston rod moves right；Right chamber oil return returns sealed reservoir 2 through hydraulic control one-way valve 4.2, simultaneously bi-directionally
The inlet port of gear pump 8 through check valve 3.2 from the inner oil suction of sealed reservoir 2, when piston rod movement in place after, motor stops.
Execute oil cylinder (preferably double outlet-rod hydraulic cylinders) to move downward: the reception of bilateral servo motor 9 is opened after moving downward instruction
Dynamic, double-direction gearpump 8 exports oil liquid through check valve 3.4 to double 1 right chamber fuel feeding of outlet-rod hydraulic cylinder, and maximum thrust is by pump discharge overflow
Valve 5.2 is set, and piston rod moves downward；Left chamber oil return returns sealed reservoir 2 through hydraulic control one-way valve 4.1, simultaneously bi-directionally gear pump 8
Inlet port through check valve 3.1 from the inner oil suction of sealed reservoir 2, when piston rod movement in place after, motor stops.
After motor stops, being realized by check valve 3.3,3.4, hydraulic control one-way valve 4.1,4.2, overflow valve 5.3,5.4 hydraulic
Cylinder piston rod position is kept, and the maximum pressure of two chamber of hydraulic cylinder is set by overflow valve 5.3,5.4.
After motor stops, when solenoid directional control valve 6 obtains electric, left and right two chamber of double outlet-rod hydraulic cylinders 1 is linked up, in the work of external force
With lower, it can be achieved that actuator quick condition.
Moving cell, preferred embodiment are made in a kind of integrated electrical liquid steering of the invention are as follows: execute oil cylinder largest axial load
62kN, maximum operational speed 60mm/s, middle bit length 840mm, stroke 255mm.Preferably executing oil cylinder working-pressure range P is
The oil absorption capacity of double-direction gearpump is effectively ensured in 0.07MPa≤P≤0.12MPa, it is ensured that moving cell is made in integrated electrical liquid steering
Maximum movement speed.
The main working parameters of double-direction gearpump are as shown in table 1.
The main working parameters of 1 double-direction gearpump of table
| Serial number | Parameter name | Parameter value | Remarks |
| 1 | Maximum working pressure (MWP) P1/MPa | 30 | |
| 2 | Discontinuous operation pressure P2/MPa | 31 | |
| 3 | Peak-peak pressure P3/MPa | 36 | |
| 4 | Unloaded maximum (top) speed/rpm | 4700 | |
| 5 | Minimum speed/rpm under P1 pressure | 550 | |
| 6 | Oil suction pressure/MPa | 0.07-0.3 |
The main working parameters of servo motor are as shown in table 2.
The main working parameters of 2 servo motor of table
Showing that moving cell is made in a kind of integrated electrical liquid steering provided by the invention by product prototype test can be effectively real
Existing special vehicle steering system performance, integrated electrical liquid steering actuation unit performance index is as shown in table 3, using electric drive mould
Formula realizes that special vehicle is taken turns independent driving entirely and turned to by the single electro-hydraulic moving cell of making of vehicle control device control, realizes vehicle
Multi-mode steering builds the module that complicated steering system is simplified to " moving cell is made in novel electro-hydraulic integrated steering ", realizes intelligence
The modularization and rapid design of any shafting turning function of special vehicle can be changed.Integrated electrical liquid turns to actuation unit performance and refers to
Mark is as shown in table 3；
3 integrated electrical liquid of table turns to actuation unit performance index
| Serial number | Parameter name | Performance indicator | Test value | Whether meet the requirements | Remarks |
| 1 | Largest axial load/kN | ≥60 | 62 | Meet | |
| 2 | Maximum speed mm/s | ≥60 | 60 | Meet | |
| 3 | Collapse length mm | 840 | 840 | Meet | |
| 4 | Stroke mm | ≥220 | 255 | Meet |
(quick condition) control method for making moving cell is turned to based on a kind of integrated electrical liquid of the invention, steps are as follows
(1) oil cylinder (execute oil cylinder and select double outlet-rod hydraulic cylinders) is executed to move right:
(1.1) reception of bilateral servo motor 9 starts after moving right instruction, and double-direction gearpump 8 exports oil liquid through check valve
3.3 to double 1 left chamber fuel feeding of outlet-rod hydraulic cylinder,
(1.2) maximum thrust of double-direction gearpump outlet overflows valve 5.1 is set, piston rod is transported to the right
(1.3) it executes right cavity of cylinder oil return and returns sealed reservoir 2 through hydraulic control one-way valve 4.2, while the inlet port of pump 8 is through unidirectional
Valve 3.2 from the inner oil suction of sealed reservoir 2, when piston rod movement in place after, motor stops；
(2) oil cylinder (double outlet-rod hydraulic cylinders) is executed to move downward:
(2.1) reception of bilateral servo motor 9 starts after moving downward instruction,
(2.2) double-direction gearpump 8 exports oil liquid through check valve 3.4 to double 1 right chamber fuel feeding of outlet-rod hydraulic cylinder,
(2.3) 5.2 maximum thrust of double-direction gearpump outlet overflows valve is set, piston rod moves downward；(2.4) left chamber oil return
Sealed reservoir 2 is returned through hydraulic control one-way valve 4.1, while pumping 8 inlet port through check valve 3.1 from the inner oil suction of sealed reservoir 2, works as piston
After bar movement in place, motor stops.
(3) after motor stops, passing through check valve 3.3,3.4, hydraulic control one-way valve 4.1,4.2, the realization liquid of overflow valve 5.3,5.4
Pressure cylinder piston bar position is kept, and the maximum pressure of two chamber of hydraulic cylinder is set by overflow valve 5.3,5.4.
(4) after motor stops, when solenoid directional control valve 6 obtains electric, left and right two chamber of double outlet-rod hydraulic cylinders 1 is linked up, in external force
Effect is lower, it can be achieved that actuator quick condition.
In above-mentioned quick condition control method, common group of valve body, check valve, overflow valve, hydraulic control one-way valve, solenoid directional control valve
At control valve block assembly, check valve, overflow valve, hydraulic control one-way valve, solenoid directional control valve are mounted in valve body；The two of double-direction gearpump
A hydraulic fluid port is provided with overflow valve and limits the output power of double-direction gearpump for setting oil sources maximum working pressure, prevent two-way
Servo motor overload；Two hydraulic fluid ports for executing oil cylinder are provided with overflow valve, can execute the raising of oil cylinder temperature or load sudden change
When, limitation executes cylinder efficient pressure；Sealed reservoir to two hydraulic fluid port of double-direction gearpump is respectively provided with check valve, realizes bi-directional teeth
Wheel pump unidirectionally builds the normal switching of pressure and oil absorptive function.Two chambers for executing oil cylinder are respectively provided with hydraulic control one-way valve, for holding
When row oil cylinder stretches receipts movement, oil return side oil liquid returns to sealed reservoir heat dissipation, reduces the temperature of cycle operation oil liquid.Execute oil cylinder
Between two chambers be provided with solenoid directional control valve, must not electricity when, disconnect execute oil cylinder two working chambers；When obtaining electric, oil will be executed
Two working chambers of cylinder are connected to, under operating condition of meeting an urgent need, realizing that executing the connection of two chamber of oil cylinder is in floating working condition.It floats
Working condition are as follows: when solenoid directional control valve obtains electric in control valve block assembly, movement can be followed under load effect by executing oil cylinder.
Emergency operating condition, comprising: bilateral servo motor failure or double-direction gearpump failure.The electric energy of bilateral servo motor output passes through two-way
Gear pump is converted to the pressure energy of oil sources, extends and retracts movement by Oil-source control execution oil cylinder.Oil cylinder is executed using double
Outlet-rod hydraulic cylinder, including two oil pockets realize that double outlet-rod hydraulic cylinder inner piston rods are unidirectionally transported by another chamber oil return of a chamber oil inlet
It is dynamic.Double outlet-rod hydraulic cylinders, comprising: cylinder barrel, piston rod, end cap, trunnion, pedestal；Cylinder barrel and pedestal are connected, and piston rod passes through cylinder barrel
With the end cap at cylinder barrel both ends；Cylinder barrel is divided into two parts, two oil pockets of stroke by piston rod, and the both ends of piston rod are arranged in trunnion,
It is connect with external loading.Sealed reservoir is closed type hydraulic oil tank, using closed type structure, it is ensured that moving cell is made in integrated electrical liquid steering
Under any operating attitude, double-direction gearpump has good oil absorption capacity.Bilateral servo motor, double-direction gearpump, transmission shaft,
The power unit and execute oil cylinder using modularization, power unit and execution oil cylinder energy that sealed reservoir, control valve block assembly form
It is enough to be become one by being spirally connected, also can be arranged apart according to installation space, it is connected by exterior line.Power unit with hold
Row oil cylinder parallel arrangement, effectively reduces axial arrangement space.
The present invention makees moving cell using integrated electrical liquid steering in special vehicle chassis steering system, can save each group vehicle
Complicated steering gear connection structure between bridge, compared with conventional steering hydraulic system can accordingly save hydraulic oil source, each bridge steering cylinder,
All kinds of control valve members, numerous fluid pressure lines, additionally it is possible to the probability for reducing steering hydraulic system evaporating, emitting, dripping or leaking of liquid or gas, using integrated electric
Liquid steering makees that moving cell advantage is significant, makees the oil sources of moving cell by turning to integrated electrical liquid and executes oil cylinder run-in index cloth
It sets, effectively reduces axial arrangement space, be easily installed.
The present invention, which makees in moving cell modular power unit and execution oil cylinder by integrated electrical liquid steering, to be passed through
It is spirally connected and becomes one, also can be arranged apart according to installation space, it is connected by exterior line, mounting means is flexible, passes through
It is closed type hydraulic oil tank that tank design in moving cell is made in integrated electrical liquid steering, using closed type structure, it is ensured that integrated electrical liquid turns
To making under moving cell what operating attitude in office, double-direction gearpump has good oil absorption capacity, at the same effectively prevent fifth wheel into
Enter system.
The present invention is turned to by integrated electrical liquid and is provided with electromagnetic switch between two chambers for making to execute oil cylinder in moving cell
Valve, under operating condition of meet an urgent need, solenoid directional control valve obtains electric, realizes and executes the connection of two chamber of oil cylinder in floating working condition, outside
Vehicle wheel alignment may be implemented under active force, effectively improve the safety of steering.
Claims (11)
1. moving cell is made in a kind of integrated electrical liquid steering, characterized by comprising: bilateral servo motor, double-direction gearpump, execution
Oil cylinder, transmission shaft, sealed reservoir, control valve block assembly；
The rotation direction and revolving speed of externally input control signal control bilateral servo motor, bilateral servo motor are driven by transmission shaft
Double-direction gearpump exports oil liquid flow, to drive the stretching direction for executing oil cylinder and stretch out speed；
Control valve block assembly, when stopping working for bilateral servo motor, the movement position for executing oil cylinder is kept, and can be used in
When execution oil cylinder stretches receipts movement, oil return side oil liquid returns to sealed reservoir heat dissipation, reduces the temperature of oil liquid；Control valve block assembly can
When executing the raising of oil cylinder temperature or load sudden change, limitation executes cylinder efficient pressure, and for setting double-direction gearpump highest
Operating pressure limits the output power of double-direction gearpump, prevents bilateral servo motor overload；Control valve block assembly, which can be realized, to be held
All cavity connections of row oil cylinder are in floating working condition.
2. moving cell is made in a kind of integrated electrical liquid steering according to claim 1, it is characterised in that: control valve block assembly,
It include: valve body, check valve, overflow valve, hydraulic control one-way valve, solenoid directional control valve；
Check valve, overflow valve, hydraulic control one-way valve, solenoid directional control valve are mounted in valve body；
Two hydraulic fluid ports of double-direction gearpump are provided with overflow valve, for setting oil sources maximum working pressure, limit double-direction gearpump
Output power, prevent bilateral servo motor overload；
Two hydraulic fluid ports for executing oil cylinder are provided with overflow valve, can be when executing the raising of oil cylinder temperature or load sudden change, and limitation is held
Row cylinder efficient pressure；
Sealed reservoir to two hydraulic fluid port of double-direction gearpump is respectively provided with check valve, realizes that double-direction gearpump unidirectionally builds pressure and oil suction function
The normal switching of energy；
Two chambers for executing oil cylinder are respectively provided with hydraulic control one-way valve, and when stretching receipts movement for executing oil cylinder, oil return side oil liquid is returned
It radiates to sealed reservoir, reduces the temperature of cycle operation oil liquid；
Execute oil cylinder two chambers between be provided with solenoid directional control valve, must not electricity when, disconnect execute oil cylinder two working chambers；?
When electric, two working chambers for executing oil cylinder are connected to, are used under operating condition of meeting an urgent need, realized and execute the connection of two chamber of oil cylinder in floating
Working condition.
3. moving cell is made in a kind of integrated electrical liquid steering according to claim 1, it is characterised in that: floating working condition
Are as follows: when solenoid directional control valve obtains electric in control valve block assembly, movement can be followed under load effect by executing oil cylinder.
4. moving cell is made in a kind of integrated electrical liquid steering according to claim 1, it is characterised in that: emergency operating condition, comprising:
Bilateral servo motor failure or double-direction gearpump failure.
5. moving cell is made in a kind of integrated electrical liquid steering according to claim 1, it is characterised in that: bilateral servo motor is defeated
Electric energy out is converted to the pressure energy of oil sources by double-direction gearpump, extends and retracts fortune by Oil-source control execution oil cylinder
It is dynamic.
6. moving cell is made in a kind of integrated electrical liquid steering according to claim 1, it is characterised in that: execute oil cylinder using double
Outlet-rod hydraulic cylinder, including two oil pockets realize that double outlet-rod hydraulic cylinder inner piston rods are unidirectionally transported by another chamber oil return of a chamber oil inlet
It is dynamic.
7. moving cell is made in a kind of integrated electrical liquid steering according to claim 1, it is characterised in that: double outlet-rod hydraulic cylinders,
It include: cylinder barrel, piston rod, end cap, trunnion, pedestal；
Cylinder barrel and pedestal are connected, and piston rod passes through the end cap of cylinder barrel and cylinder barrel both ends；Cylinder barrel is divided into two parts, stroke by piston rod
Two oil pockets, trunnion are arranged in the both ends of piston rod, connect with external loading.
8. moving cell is made in a kind of integrated electrical liquid steering according to claim 1, it is characterised in that: sealed reservoir is enclosed
Hydraulic oil container, using closed type structure, it is ensured that integrated electrical liquid steering is made under moving cell what operating attitude in office, and double-direction gearpump is all
There is good oil absorption capacity.
9. moving cell is made in a kind of integrated electrical liquid steering according to claim 1, it is characterised in that: bilateral servo motor,
Double-direction gearpump, transmission shaft, sealed reservoir, the power unit of control valve block assembly composition and execution oil cylinder use modularization, move
Power unit can be become one with oil cylinder is executed by being spirally connected, also can be arranged apart according to installation space, pass through exterior tube
Road connection.
10. moving cell is made in a kind of integrated electrical liquid steering according to claim 1, it is characterised in that: power unit with hold
Row oil cylinder parallel arrangement, effectively reduces axial arrangement space.
11. a kind of integrated electrical liquid turns to the control method for making moving cell, it is characterised in that steps are as follows
(1) bilateral servo motor moves right execution oil cylinder:
(2) bilateral servo motor moves downward execution oil cylinder:
(3) after bilateral servo motor stops, passing through check valve 3.3,3.4, hydraulic control one-way valve 4.1,4.2,5.3,5.4 reality of overflow valve
Existing hydraulic cylinder piston rod position is kept, and the maximum pressure of two chamber of hydraulic cylinder is set by overflow valve 5.3,5.4；
(4) after motor stops, when solenoid directional control valve 6 obtains electric, left and right two chamber for executing oil cylinder is linked up, under the effect of external force, real
Existing actuator quick condition.
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| CN111927559A (en) * | 2020-07-27 | 2020-11-13 | 北京航天发射技术研究所 | Gas injection expansion actuating system and control method |
| CN112392798A (en) * | 2020-11-17 | 2021-02-23 | 浙江大学 | One-way load mechanical arm electro-hydraulic actuator unit for replacing single rolling cutter of shield machine |
| CN112412926A (en) * | 2020-11-17 | 2021-02-26 | 浙江大学 | Bidirectional load mechanical arm electro-hydraulic actuator unit for replacing single rolling cutter of shield machine |
| CN113883110A (en) * | 2021-10-09 | 2022-01-04 | 华中科技大学无锡研究院 | Electric hydrostatic actuator with replaceable multi-stroke hydraulic cylinder |
| CN114261443A (en) * | 2022-01-07 | 2022-04-01 | 天津德科智控股份有限公司 | Electro-hydraulic steering system and control method |
| CN114291158A (en) * | 2022-03-09 | 2022-04-08 | 天津德科智控股份有限公司 | Electro-hydraulic power-assisted steering system and control method |
| US11981407B2 (en) * | 2019-08-26 | 2024-05-14 | Ultraflex S.P.A. | Hydraulic steering device for a boat, a vessel, or the like |
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| CN113883110A (en) * | 2021-10-09 | 2022-01-04 | 华中科技大学无锡研究院 | Electric hydrostatic actuator with replaceable multi-stroke hydraulic cylinder |
| CN114261443A (en) * | 2022-01-07 | 2022-04-01 | 天津德科智控股份有限公司 | Electro-hydraulic steering system and control method |
| CN114291158A (en) * | 2022-03-09 | 2022-04-08 | 天津德科智控股份有限公司 | Electro-hydraulic power-assisted steering system and control method |
| CN114291158B (en) * | 2022-03-09 | 2022-06-07 | 天津德科智控股份有限公司 | Electro-hydraulic power-assisted steering system and control method |
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