CN103791007B - Adaptive session flow control system on engineering machinery vehicle - Google Patents
Adaptive session flow control system on engineering machinery vehicle Download PDFInfo
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- CN103791007B CN103791007B CN201410064313.3A CN201410064313A CN103791007B CN 103791007 B CN103791007 B CN 103791007B CN 201410064313 A CN201410064313 A CN 201410064313A CN 103791007 B CN103791007 B CN 103791007B
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Abstract
The invention discloses a kind of adaptive session flow control system on engineering machinery vehicle, including reductor, motor, friction plate and reversal valve A, described motor power is connected on reductor, friction plate power coordinates contact motor, described reversal valve A and motor are by oil pipe airtight connection, it is characterized in that: also include buffer cell and oil cylinder, described reversal valve A is respectively by main oil pipe A and main oil pipe B and motor airtight connection, and described buffer cell passes through the airtight connection of buffer cell connected pipes between main oil pipe A and main oil pipe B；Described oil cylinder is connected with friction plate power.The present invention controls flow and the time of oil cylinder oil return by the hydraulic shock that engineering machinery produces in stopped process, thus reach to control in real time the intervention time of friction plate, to realize adjusting in real time intervention time h2 according to the actual operating condition of engineering machinery, intervention time h2 is cooperated consistent with braking time h1, reduce the mechanical loss of the parts such as friction plate, motor, improve braking ability and the purpose in braking life-span of engineering machinery.
Description
Technical field
The present invention relates to engineering machinery vehicle technical field, particularly relate to a kind of on engineering machinery vehicle
Adaptive session flow control system.
Background technology
Engineering machinery vehicle and orthodox car when starting operation, the especially structure when parking and parking mode
There is the biggest difference, engineering machinery vehicle is in complicated work condition environment, often to protect vehicle, to carry
High safety performance is crucial, and orthodox car generally requires and realizes parking in the shortest time.At engineering machinery vehicle
During walking to stopping, owing to engineering machinery loads more weight, being used to of its engineering machinery vehicle
Property the biggest, the inertia of engineering machinery will produce the highest compression shock to running motor, and this is engineering machine
The difficult point that tool steadily stops, by the life-span of motor and other parts is caused big impact, also affecting simultaneously
The braking ability of engineering machinery.
The braking of engineering machinery vehicle mainly rely in stopped process plugging moment of torsion produced by motor and
The cushioning effect of control valve makes excavator steadily stop, after engineering machinery steadily stops, then by friction plate
Get involved, keep the invariant position of engineering machinery.In the process, engineering machinery relies on motor reactive torque system
Dynamic required braking time h1 that time is engineering machinery, friction plate laminating provides the time of frictional damping moment of torsion
It is referred to as the intervention time h2 of friction plate, during engineering machinery brake operating, first passes through the reverse torsion of braking time h1
Square is braked, and stops through friction plate friction the most again.
Braking time h1 of engineering machinery is to improve engineering machinery with the coupled relation of friction plate intervention time h2
Braking ability and the key in running motor life-span, it is necessary to the braking control system of engineering machinery is made in buffering
Just allow friction plate get involved after absorbing the main inertia force in complete machine stopped process during with, otherwise rub
The life-span of sheet also will be substantially reduced.
Owing to engineer machinery operation operating mode is complicated, it is desirable to engineering machinery with at a high speed or low speed on level land, upward slope,
To stop the most reliably when travelling in the different gradient such as descending.Therefore, braking time h1 of engineering machinery is
Change with the change of engineering machinery operating mode, and the friction plate intervention time h2 of prior art is by friction plate
The fixed orifice of oil cylinder limits oil return speed in oil cylinder, allows the speed of friction plate oil cylinder pushing friction plate drop
Low, the time is elongated, and then the friction plate intervention time h2 of prior art is a fixed value.Due to engineering machinery
Vehicle is affected by road speed, ramp, operating mode etc., the friction plate intervention time h of a fixed value, it is difficult to real
After now the braking through braking time h1 completes, friction plate is got involved again.If friction plate intervention time h2
Less than braking time h1, then the friction plate life-span will drastically reduce；If friction plate intervention time h2 is more than braking
Between h1, then there will be and slip car phenomenon, bring danger to construction operation.
Summary of the invention
The weak point existed for prior art, it is an object of the invention to provide a kind of for engineering machinery
Adaptive session flow control system on vehicle, this control system is produced in stopped process by engineering machinery
Hydraulic shock controls length and the time of oil cylinder oil return, thus reaches to control in real time the intervention time of friction plate,
The most consistent with braking time h1 to realize intervention time h2, reduce the machine of the parts such as friction plate, motor
Tool is lost, and improves braking ability and the purpose in braking life-span of engineering machinery.
The purpose of the present invention is achieved through the following technical solutions:
A kind of adaptive session flow control system on engineering machinery vehicle, including reductor, motor, rubs
Pad and reversal valve A, described motor power is connected on reductor, and friction plate power coordinates contact motor, institute
State reversal valve A with motor by oil pipe airtight connection, it is characterised in that: also include buffer cell and oil cylinder,
Described reversal valve A is respectively by main oil pipe A and main oil pipe B and motor airtight connection, and described buffer cell leads to
Cross the airtight connection of buffer cell connected pipes between main oil pipe A and main oil pipe B；Described oil cylinder and friction plate
Power is connected.
The present invention provides a kind of optimal technical scheme being provided with adaptive throttling control unit to be: described oil cylinder
Being provided with adaptive throttling control unit by the airtight connection of oil pipe, adaptive throttling control unit is divided by oil pipe
Not with main oil pipe A, main oil pipe B is airtight connects.
The optimal technical scheme that the present invention provides another kind to be not installed with adaptive throttling control unit is: described
Connect by oil pipe is airtight between oil cylinder with reversal valve A, the oil pipe between oil cylinder and reversal valve A is provided with
Throttle orifice, this throttle orifice is at oil cylinder position.
According to the present invention, the technical scheme that adaptive throttling control unit technical scheme is further preferred is installed
It is to be respectively equipped with check valve on described main oil pipe A and main oil pipe B.
Further technical scheme is, by oil between described adaptive throttling control unit and reversal valve A
Managing airtight connection and be provided with reversal valve, described reversal valve A is respectively by commutation oil pipe A, the first commutation oil pipe and master
The airtight connection of oil pipe A, described reversal valve A is respectively by commutation oil pipe B, the second commutation oil pipe and main oil pipe B
Airtight connection.
The present invention provides a kind of preferably adaptive throttling control unit structure technology scheme to be: described self adaptation
Throttling control unit includes that valve body, plug, fairlead and spool, described valve body have internal cavities, valve
Being provided with fairlead in the internal cavities of body, the rear end of described spool is installed in the set of fairlead, spool
Rear end can come and go slip in fairlead, and the front end of spool is placed in the internal cavities of valve body；Described plug is pacified
It is contained in the end, rear end of described valve body.
Further preferred valve core structure technical scheme is that the front end of described spool is provided with spiral segment chute.
Further technical scheme is: described adaptive throttling control unit is provided with inlet one, feed liquor
Mouth two, inlet three and liquid outlet T, described inlet one is airtight with main oil pipe A to be connected, and inlet two is with main
The airtight connection of oil pipe B, described inlet one, inlet two are all airtight with the internal cavities of valve body to be connected, institute
State that inlet three P is airtight with reversal valve to be connected；Liquid outlet connects by oil pipe is airtight with described oil cylinder.
Further technical scheme is: described liquid outlet T is positioned at the front end of adaptive throttling control unit,
Described inlet three P, inlet one and inlet two depend in adaptive throttling control unit from front end to rear end
Secondary arranged.
The present invention compared with the prior art, has the following advantages and beneficial effect:
This control system controls oil cylinder oil return by the hydraulic shock that engineering machinery produces in stopped process
Flow and time, thus reach to control in real time the purpose of the intervention time of friction plate.By buffer cell and
The self-adaptive components such as adaptive throttling control unit control recirculating oil quantity and the time of oil cylinder, thus realize permissible
Realize adjusting in real time intervention time h2 according to the actual operating condition of engineering machinery so that intervention time h2 and braking
Time h1 cooperates unanimously, reduces the mechanical loss of the parts such as friction plate, motor, improves engineering machine
The braking ability of tool and the purpose in braking life-span.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment one；
Fig. 2 is the structural representation of embodiment two；
Fig. 3 is the structural representation that the reversal valve A in Fig. 2 connects hydraulic fluid port A；
Fig. 4 is the structural representation of adaptive throttling control unit；
Fig. 5 is the inlet of adaptive throttling control unit, liquid outlet layout schematic diagram；
Fig. 6 be reversal valve spring be uncompressed, the structural representation of non-switch operation；
Fig. 7 be reversal valve spring by after compressing, the structural representation of switch operation.
Wherein, entitled corresponding to the reference in accompanying drawing:
1-reductor, 2-motor, 3-friction plate, 4-oil cylinder, 5-adaptive throttling control unit, 6
-buffer cell, 7-reversal valve, 8-reversal valve A, 81-hydraulic fluid port A, 82-hydraulic fluid port B, 51-valve body,
52-plug, 53-fairlead, 54-spool, 541-spiral segment chute, the main oil of 9-main oil pipe A, 10-
Pipe B, 11-check valve, 12-buffer cell connected pipes, 13-first commutates oil pipe, and 14-commutates oil pipe
A, 15-first commutates oil pipe, and 16-commutates oil pipe B, 17-throttle orifice, 18-oil pipe A, 19-oil pipe B,
20-oil pipe C, 21-oil pipe D, K1-inlet one, K2-inlet two, P-inlet three, T-goes out
Liquid mouth.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail:
Embodiment one
As it is shown in figure 1, a kind of adaptive session flow control system on engineering machinery vehicle, including slowing down
Machine 1, motor 2, friction plate 3 and reversal valve A8, motor 2 power is connected on reductor 1, friction plate 3
Power coordinates contact motor 2, and reversal valve A8 and motor 2 are by oil pipe airtight connection.Present invention additionally comprises slow
Rushing unit 6 and oil cylinder 4, reversal valve A8 is respectively by main oil pipe A9 and main oil pipe B10 and the airtight company of motor 2
Connecing, buffer cell 6 passes through the airtight connection of buffer cell connected pipes 12 at main oil pipe A9 and main oil pipe B10
Between；Oil cylinder 4 is connected with friction plate 3 power.
Connect, between oil cylinder 4 and reversal valve A8 by oil pipe is airtight between oil cylinder 4 with reversal valve A8
Oil pipe is provided with throttle orifice 17, and this throttle orifice 17 is near oil cylinder 4 position.The main oil pipe A9 of the present embodiment
Be respectively equipped with check valve 11 on main oil pipe B10.Oil in so main oil pipe A9 can only be from hydraulic fluid port A81 one end
Flowing to motor 2 one end, the oil in such main oil pipe B10 can only flow to motor 2 one end from hydraulic fluid port B82 one end.
The operation principle of the present embodiment technical scheme is as follows:
At engineering machinery vehicle by starting in walking process, if as it is shown in figure 1, reversal valve A8 moves right
Dynamic, then reversal valve A8 connects hydraulic fluid port A81, now the hydraulic oil in reversal valve A8 will pass through hydraulic fluid port A81,
Main oil pipe A9 enters in motor 2, and drives motor 2 to move, and provides power, motor 2 to lead to for motor 2
Walking power needed for providing for engineering machinery vehicle after reductor 1 slows down is provided；Oil meeting after motor 2
Pass sequentially through main oil pipe B10, commutation oil pipe B16 is back in reversal valve A8, it is achieved the circulation of whole oil makes
With.The operation principle that reversal valve A8 was moved to the left and connected hydraulic fluid port B82 is identical with the operation principle of foregoing description.
When walking with engineering machinery vehicle, as a example by reversal valve A8 connects hydraulic fluid port A81, in order to allow motor 2 drive
Engineering machinery vehicle is walked, and the hydraulic oil in reversal valve A8 can be flowed through check valve 11 by logical hydraulic fluid port A81
Entering in the main oil pipe A9 of motor 2 side, the hydraulic oil in main oil pipe A9 just drives motor 2 to rotate
And the walking power needed for engineering machinery is provided.During engineering machinery vehicle is by stopping of walking, as
Shown in Fig. 1, reversal valve A8 moves to centre position (the most both having disconnected hydraulic fluid port A81, disconnect again hydraulic fluid port B82),
(oil in logical hydraulic fluid port A81 direction will not by the state that is in a relative closure for the oil of whole engineering machinery vehicle
Enter back into the oil in main oil pipe A9, hydraulic fluid port B82 direction not further into main oil pipe B10, whole engineering machine
The oil of tool vehicle will flow between the parts of more than reversal valve A8), engineering machinery vehicle can rely on used
Property walk forward, owing to the quality of engineering machinery vehicle is relatively big, so inertia is the biggest, engineering machinery vehicle
The segment distance that will continue to walk just can be finally stopped.
When engineering machinery vehicle can rely on inertia to walk forward, motor 2 rotates according to direction of travel, now
Motor 2 can be by the oil transport in main oil pipe A9 to main oil pipe B10 so that the oil of main oil pipe B10 produces wink
Between hydraulic oil, now instantaneous pressure oil can be flowed in buffer cell 6 by buffer cell connected pipes 12,
When the oil pressure in buffer cell connected pipes 12 is more than overflow valve opening pressure in buffer cell 6, overflow valve
Will open, now buffer cell 6 will by the hydraulic oil overflow in main oil pipe B10 to main oil pipe A9,
To reduce the oil pressure in its main oil pipe B10.Owing to buffer cell 6 uses overflow manner, fortune in the unit interval
Oil transportation amount is less, and the oil in main oil pipe B10 will be in high pressure conditions within a certain period of time, and engineering machine vehicle
Walking the most forward under effect of inertia, the oil in main oil pipe A9 can be brought into main oil pipe B10 by motor 2
In, owing to the oil pressure in main oil pipe B10 is higher, so the oil pressure in main oil pipe B10 can give 2 one, motor
Huge opposition.Along with engineering machinery vehicle walks under inertia force effect, owing to buffering is single
Unit's 6 flooding velocitys are relatively slow, and the opposition that motor 2 is subject to is increasing, and the operating of motor 2 will be got over
Coming the slowest, the oil pressure of main oil pipe B10 can be increasing, so when oil pressure and the motor 2 of main oil pipe B10
During the equal counteracting of operating power, the purpose of engineering machinery vehicle reactive torque braking will be reached, thus make
Braking time h1 obtaining engineering machinery will shorten, and favourable engineering machinery is braked as soon as possible, whole engineering machine vehicle
Oil in closed state balances as soon as possible.
While engineering machinery vehicle dependence inertia walks forward braking, the oil meeting in whole closed system
Oily passage through reversal valve A8 is flowed in the oil pipe being connected with oil cylinder 4, and the present invention is arranged on this oil pipe
Have throttle orifice 17, be slowly in oil cylinder 4 by throttle orifice 17, motor 2 in the running, generation
Instantaneous pressure oil will enter in oil cylinder 4 by throttle orifice 17, and so entering into the oil in oil cylinder 4 will root
Changing according to the oil pressure of whole closed system and change, its oil cylinder 4 promotes friction plate 3 to realize frictional damping stopping
Friction plate intervention time h2 be not the most fixed value, elongated or shorten also with oil pressure change, preferably join
Closing braking time h1, such friction plate intervention time h2 and braking time h1 will be according to engineering machinery
Concrete walking situation realizes extraordinary parking toll, after motor reactive torque has been braked, and friction plate
Just it is then brought into motor and realizes friction shut-down operation.Achieve intervention time h2 and braking time h1 almost
Cause, reduce the mechanical loss of the parts such as friction plate, motor, improve braking ability and the system of engineering machinery
The purpose in dynamic life-span.
Embodiment two
As shown in Figure 2 to 7, a kind of adaptive session flow control system on engineering machinery vehicle, including
Reductor 1, motor 2, friction plate 3 and reversal valve A8, motor 2 power is connected on reductor 1, friction
Sheet 3 power coordinates contact motor 2, and reversal valve A8 and motor 2 are by oil pipe airtight connection.The present invention also wraps
Including buffer cell 6 and oil cylinder 4, reversal valve A8 is close with motor 2 by main oil pipe A9 and main oil pipe B10 respectively
Closing connection, buffer cell 6 passes through the airtight connection of buffer cell connected pipes 12 at main oil pipe A9 and main oil pipe
Between B10；Oil cylinder 4 is connected with friction plate 3 power.
As in figure 2 it is shown, oil cylinder 4 is provided with adaptive throttling control unit 5, self adaptation by the airtight connection of oil pipe
Throttling control unit 5 by oil pipe respectively with main oil pipe A9, main oil pipe B10 is airtight connects.
It is respectively equipped with check valve 11 on the main oil pipe A9 and main oil pipe B10 of the present embodiment.So main oil pipe A9
Interior oil can only flow to motor 2 one end from hydraulic fluid port A81 one end, and the oil in such main oil pipe B10 can only be from oil
Mouth B82 one end flows to motor 2 one end.
As in figure 2 it is shown, set by airtight connection of oil pipe between adaptive throttling control unit 5 with reversal valve A8
Having reversal valve 7, reversal valve A8 is respectively by commutation oil pipe A13, the first commutation oil pipe 15 and main oil pipe A9
Airtight connection, reversal valve A8 respectively by commutation oil pipe B14, second commutation oil pipe 16 close with main oil pipe B10
Close connection.
As shown in Figure 4, adaptive throttling control unit 5 include valve body 51, plug 52, fairlead 53 with
And spool 54, valve body 51 has internal cavities, is provided with fairlead 53, valve in the internal cavities of valve body 51
The rear end of core 54 is installed in the set of fairlead 53, and the rear end of spool 54 can come and go sliding in fairlead 53
Dynamic, the front end of spool 54 is placed in the internal cavities of valve body 51；Plug 52 is arranged on the rear end of valve body 51
End.
The front end of the preferred spool of the present embodiment 54 is provided with spiral segment chute 541.
As it is shown in figure 5, adaptive throttling control unit 5 is provided with inlet one K1, inlet two K2, enters
Liquid mouth three P and liquid outlet T, inlet one K1 is airtight with main oil pipe A9 to be connected, inlet two K2 and main oil
The airtight connection of pipe B10, inlet one K1, inlet two K2 are all airtight with the internal cavities of valve body 51 to be connected,
Inlet three P is airtight with reversal valve 7 to be connected；Liquid outlet T connects by oil pipe is airtight with oil cylinder 4.
As shown in Figure 4, the present embodiment preferred liquid outlet T is positioned at the front end of adaptive throttling control unit 5,
Inlet three P, inlet one K1 and inlet two K2 in adaptive throttling control unit 5 from front end to rear
End is arranged in order layout.
The operation principle of the present embodiment technical scheme is as follows:
As shown in Fig. 2, Fig. 6, engineering machinery vehicle is before not actuated, and the spring on reversal valve 7 just will be in
Often under state, the oil pressure of the oil pipe A18 being connected between reversal valve A8 with reversal valve 7 is relatively low, at reversal valve 7
In open mode, reversal valve 7 connects with the oil storage cylinder being positioned at below reversal valve 7, due to reversal valve 7 with from
Adapting to throttling control unit 5 connected by oil pipe B19, adaptive throttling control unit 5 is passed through with oil cylinder 4
Oil pipe connects, and the oil in such oil cylinder 4 passes sequentially through adaptive throttling control unit 5, oil pipe B19, commutation
Valve 7 is flowed in oil storage cylinder.Spring in oil cylinder 4 is uncompressed, and now friction plate 3 is at the elastic force of spring
Fitting tightly motor 2 under effect, friction plate 3 just plays friction and stops the purpose of motor 2 operating.
At engineering machinery vehicle by starting in walking process, as shown in Fig. 2, Fig. 7, engineering machinery vehicle opens
Time dynamic, if reversal valve A8 moves right, then reversal valve A8 connects hydraulic fluid port A81, the high pressure of reversal valve A8
Oil flows to reversal valve 7 by oil pipe A18, and this hydraulic oil promotes the spring on reversal valve 7 in reversal valve 7,
Spring is stressed contraction, and the hydraulic oil of reversal valve 7 is flowed in oil cylinder 4 by oil pipe B19, oil cylinder 4
In spring just compressed, now friction plate 3 under hydraulic oil effect away from motor 2, friction plate 3 is the most not
Fitting motor 2, motor 2 just can operate smoothly again.
As it is shown on figure 3, same as a example by reversal valve A8 moves right, then reversal valve A8 connects hydraulic fluid port A81,
Now the hydraulic oil in reversal valve A8 will be entered in motor 2 by hydraulic fluid port A81, main oil pipe A9, and be driven
Dynamic motor 2 moves, and provides power, motor 2 to be engineering machine vehicle after being slowed down by reductor 1 for motor 2
Provide needed for walking power；Oil after motor 2 can pass sequentially through main oil pipe B10, commutation oil pipe
B14 is back in reversal valve A8, it is achieved the recycling of whole oil.Reversal valve A8 is moved to the left and connects oil
The operation principle of mouth B82 is identical with the operation principle of foregoing description.
During engineering machinery vehicle is by stopping of walking, as in figure 2 it is shown, during reversal valve A8 moves to
Between position (the most both having disconnected hydraulic fluid port A81, disconnect again hydraulic fluid port B82), the oil of whole engineering machinery vehicle will
The state being in a relative closure (leads to the oil in hydraulic fluid port A81 direction not further into main oil pipe A9, hydraulic fluid port
The oil in B82 direction is not further into main oil pipe B10, and the oil of whole engineering machinery vehicle will be at reversal valve A8
Flow between above parts), engineering machinery vehicle can rely on inertia to walk forward.With engineering machinery
During vehicle to run, as a example by reversal valve A8 connects hydraulic fluid port A81, in order to allow motor 2 drive engineering machinery vehicle row
Walking, the hydraulic oil in reversal valve A8 can be flowed near motor 2 through check valve 11 by logical hydraulic fluid port A81
In the main oil pipe A9 of side, the hydraulic oil in main oil pipe A9 just drives motor 2 rotate and provide engineering machinery
Required walking power.
When engineering machinery vehicle can rely on inertia to walk forward, motor 2 rotates according to direction of travel, now
Motor 2 can be by the oil transport in main oil pipe A9 to main oil pipe B10 so that the oil of main oil pipe B10 produces wink
Between hydraulic oil, now buffer cell 6 will by the hydraulic oil overflow in main oil pipe B10 to main oil pipe A9,
To reduce the oil pressure in its main oil pipe B10.Owing to buffer cell 6 uses overflow manner, fortune in the unit interval
Oil transportation amount is less, and the oil in main oil pipe B10 will be in high pressure conditions within a certain period of time, and engineering machine vehicle
Walking the most forward under effect of inertia, the oil in main oil pipe A9 can be brought into main oil pipe B10 by motor 2
In, owing to the oil pressure in main oil pipe B10 is higher, so the oil pressure in main oil pipe B10 can give 2 one, motor
Huge opposition.
The present embodiment is provided with adaptive throttling control unit 5, owing to adaptive throttling control unit 5 is passed through
Oil pipe respectively with main oil pipe A9 and main oil pipe B10 is airtight connects, adaptive throttling control unit 5 is at main oil pipe
When B10 side produces instantaneous pressure oil, adaptive throttling control unit 5 will be at K2 by oil pipe D21
Absorb part oil, owing to adaptive throttling control unit 5 structure self contains adaptive supply system (ginseng
See the adaptive throttling control unit operation principle part of this specification), this supply system can be according to certain rule
This part oil is delivered in oil cylinder 4 by rule, oil cylinder 4 drive under the effect of this part oil friction plate 3 towards
Move in intervention direction.Now buffer cell 6 will be by the hydraulic oil overflow in main oil pipe B10 to main oil pipe A9
In, to reduce the oil pressure in its main oil pipe B10.Owing to buffer cell 6 uses overflow manner, unit interval
Interior transport oil mass is less, and the oil in main oil pipe B10 will be in high pressure conditions within a certain period of time, and engineering machine
Tool vehicle is walked the most forward under effect of inertia, and the oil in main oil pipe A9 can be brought into main oil pipe by motor 2
In B10, owing to the oil pressure in main oil pipe B10 is higher, so the oil pressure in main oil pipe B10 can give motor 2 one
Individual huge opposition.Buffer cell connected pipes 12 can play the effect of snubber hydraulic oil,
The oil in whole engineering machinery vehicle closed state is allowed to balance as soon as possible, to reach reactive torque braking
Purpose, thus makes braking time h1 of engineering machinery to shorten, and favourable engineering machinery is braked as soon as possible.
While engineering machinery vehicle dependence inertia walks forward braking, the oil in whole closed system is also
Reversal valve 7 can be sequentially passed through through the oily passage of reversal valve A8 and pass through in adaptive throttling control unit 5,
Carry out the regulation of adaptive friction plate intervention time by adaptive throttling control unit 5 to control.Adaptive session
The operation principle of flow control unit 5 is as follows:
When engineering machinery vehicle can rely on inertia to walk forward, motor 2 rotates according to direction of travel, now
Motor 2 can be by the oil transport in main oil pipe A9 to main oil pipe B10 so that the oil of main oil pipe B10 produces wink
Between hydraulic oil, the oil of main oil pipe B10 will be entered by inlet two K2 of adaptive throttling control unit 5
In the internal cavities of adaptive throttling control unit 5.When start reversal valve A8 be moved to the left, connection be
During hydraulic fluid port B, same reason: when engineering machinery vehicle starts running, motor 2 is by the oil of main oil pipe B10
Transport in main oil pipe A9 so that the oil of main oil pipe A9 produces instantaneous pressure oil, and the oil of main oil pipe A9 will
Inlet one K1 by adaptive throttling control unit 5 enters into the inside of adaptive throttling control unit 5
In cavity.As it is shown in figure 5, enter into the oil level internal cavities in its left end end from inlet two K2.
Either still enter fluid from inlet two K2 to adaptive throttling control unit 5 from inlet K1, when
Spool 54 will be promoted when oil reaches a certain amount of to stretch out the internal cavities motion of adaptive throttling control unit 5
(such as Fig. 4, Fig. 5, i.e. move right), the oil entered into internal cavities from inlet one K1 is located therein
Portion, the internal cavities motion promoting spool 54 to stretch out adaptive throttling control unit 5 too (is transported the most to the right
Dynamic).When spool 54 so will be promoted to stretch out adaptive throttling control unit 5 when oil reaches a certain amount of,
Spiral segment chute 541 in the fore end outer circumference of spool 54 will be inlet K1's or inlet two K2
An adaptive throttling control unit 5 front end part, even up to extreme position is stretched out under oil pressure pressure.By
Not entering hydraulic oil from reversal valve A8 in whole engineering machinery vehicle, the oil in the oil cylinder 4 in whole system will
Overflow progressively is gone out, and the motor 2 so that spring leaf 3 is fitted under the elastic force effect of spring in oil cylinder, with reality
The purpose now braked.Now, in oil cylinder 4, fluid will pass sequentially through spiral segment chute 541, inlet three P
It is flowed in reversal valve 7, and then is flowed into the oil storage cylinder being positioned at below reversal valve 7 from reversal valve 7.?
In said process, friction plate 3 will be at leisure towards getting involved direction motion.
Now from oil cylinder 4, flow and the time of effluent oil can be calculated by equation below
L is the length that spiral segment chute 541 stretches out adaptive throttling control unit 5 internal cavities
Therefore, flow:
Can be drawn by above-mentioned formula, the flow Q that oil cylinder 4 flows out is inversely proportional to L, i.e. oil cylinder 4 emptying
The length that amount stretches out adaptive throttling control unit 5 internal cavities with spiral segment chute 541 is inversely proportional to, spiral
Throttling channel 541 stretches out the length of adaptive throttling control unit 5 internal cavities with adaptive throttling control unit 5
The hydraulic oil of internal cavities is directly proportional, when in main oil pipe B10, oil pressure is higher or in main oil pipe A9 oil pressure higher
Time, it is flowed into adaptive throttling control unit 5 just by more from main oil pipe B10 (or main oil pipe A9), L
Value will become big, and oil cylinder 4 is just more difficult to emptying.Then, only main oil pipe B10 (or main oil pipe A9) becomes
In time balancing oil pressure, L-value will diminish, and oil cylinder 4 is just easier to emptying.According to adaptive throttling control unit 5
Operation principle, so entering into the oil in oil cylinder 4 will change according to the oil pressure of whole closed system and change,
The friction plate intervention time h2 that its oil cylinder 4 promotes friction plate 3 to realize frictional damping stopping is not fixed value,
Elongated or shorten also with oil pressure change, preferably it is coupled to braking time h1, when such friction plate is got involved
Between h2 and braking time h1 will realize extraordinary parking toll according to the concrete walking situation of engineering machinery,
After motor reactive torque has been braked, friction plate is just then brought into motor and realizes friction shut-down operation.Real
Show intervention time h2 the most consistent with braking time h1, reduce the machinery of the parts such as friction plate, motor
Loss, improves braking ability and the purpose in braking life-span of engineering machinery.
" embodiment ", " another embodiment ", " embodiment " spoken of in this manual,
Deng, the specific features, structure or the feature that refer to combine the description of this embodiment are included in the application generality
In at least one embodiment described.The most multiple local appearance statement of the same race is not necessarily to refer to
Same embodiment.Furthermore, it is understood that combine any embodiment to describe a specific features, structure or spy
During point, to be advocated is to combine other embodiments also to fall at this to realize this feature, structure or feature
In the range of invention.
Although reference be made herein to invention is described by the multiple explanatory embodiment of the present invention, however, it should
Understanding, those skilled in the art can be designed that a lot of other amendments and embodiment, and these are revised and real
The mode of executing will fall within spirit disclosed in the present application and spirit.More specifically, disclosure,
In the range of drawings and claims, can the building block of theme composite configuration and/or layout be carried out many
Plant modification and improvement.In addition to the modification that building block and/or layout are carried out and improvement, for this area
For technical staff, other purposes also will be apparent from.
Claims (8)
1. the adaptive session flow control system on engineering machinery vehicle, including reductor (1), horse
Reaching (2), friction plate (3) and reversal valve A (8), described motor (2) power is connected to reductor (1)
On, friction plate (3) power coordinates contact motor (2), and described reversal valve A (8) is passed through with motor (2)
Oil pipe airtight connection, it is characterised in that: also include buffer cell (6) and oil cylinder (4), described reversal valve A
(8) respectively by main oil pipe A (9) and main oil pipe B (10) and motor (2) airtight connection, described slow
Rush unit (6) by buffer cell connected pipes (12) airtight connection at main oil pipe A (9) and main oil pipe B
(10) between；Described oil cylinder (4) is connected with friction plate (3) power；Described oil cylinder (4) passes through
The airtight connection of oil pipe is provided with adaptive throttling control unit (5), and adaptive throttling control unit (5) is by oil
Pipe is respectively with main oil pipe A (9), main oil pipe B (10) is airtight connects.
2. according to the adaptive session flow control system on engineering machinery vehicle described in claim 1, its
It is characterised by: connect, in oil cylinder (4) by oil pipe is airtight between described oil cylinder (4) with reversal valve A (8)
And the oil pipe between reversal valve A (8) is provided with throttle orifice (17), this throttle orifice (17) is near oil cylinder (4)
Position.
3. according to the adaptive session flow control system on engineering machinery vehicle described in claim 1, its
It is characterised by: on described main oil pipe A (9) and main oil pipe B (10), be respectively equipped with check valve (11).
4. according to the adaptive session flow control system on engineering machinery vehicle described in claim 1 or 3,
It is characterized in that: airtight by oil pipe between described adaptive throttling control unit (5) and reversal valve A (8)
Connection is provided with reversal valve (7), and described reversal valve A (8) is respectively by commutation oil pipe A (13), the first commutation
Oil pipe (15) is airtight with main oil pipe A (9) to be connected, and described reversal valve A (8) is respectively by commutation oil pipe B
(14), the second commutation oil pipe (16) is airtight with main oil pipe B (10) connects.
5. according to the adaptive session flow control system on engineering machinery vehicle described in claim 4, its
It is characterised by: described adaptive throttling control unit (5) includes valve body (51), plug (52), fairlead
(53) and spool (54), described valve body (51) has internal cavities, the internal cavities of valve body (51)
Inside being provided with fairlead (53), the rear end of described spool (54) is installed in the set of fairlead (53), valve
The rear end of core (54) can come and go slip in fairlead (53), and the front end of spool (54) is placed in valve body (51)
Internal cavities in；Described plug (52) is arranged on the end, rear end of described valve body (51).
6. according to the adaptive session flow control system on engineering machinery vehicle described in claim 5, its
It is characterised by: the front end of described spool (54) is provided with spiral segment chute (541).
7. according to the adaptive session flow control system on engineering machinery vehicle described in claim 5 or 6,
It is characterized in that: described adaptive throttling control unit (5) is provided with inlet one (K1), inlet two
(K2), inlet three (P) and liquid outlet (T), described inlet one (K1) is close with main oil pipe A (9)
Closing connection, inlet two (K2) is airtight with main oil pipe B (10) to be connected, and described inlet one (K1), enters
Liquid mouth two (K2) is all airtight with the internal cavities of valve body (51) to be connected, described inlet three (P) and commutation
Valve (7) airtight connection；Liquid outlet (T) connects by oil pipe is airtight with described oil cylinder (4).
8. according to the adaptive session flow control system on engineering machinery vehicle described in claim 7, its
It is characterised by: described liquid outlet (T) is positioned at the front end of adaptive throttling control unit (5), described feed liquor
Mouth three (P), inlet one (K1) and inlet two (K2) are in adaptive throttling control unit (5)
Layout it is arranged in order from front end to rear end.
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| CN201410064313.3A CN103791007B (en) | 2014-02-25 | 2014-02-25 | Adaptive session flow control system on engineering machinery vehicle |
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| CN106704408B (en) * | 2016-12-28 | 2023-07-21 | 四川省机械研究设计院(集团)有限公司 | Controllable mechanical soft start system and method |
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| CN103791007A (en) | 2014-05-14 |
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