CN104929999B - Full-hydraulic driving control system - Google Patents
Full-hydraulic driving control system Download PDFInfo
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- CN104929999B CN104929999B CN201510366049.3A CN201510366049A CN104929999B CN 104929999 B CN104929999 B CN 104929999B CN 201510366049 A CN201510366049 A CN 201510366049A CN 104929999 B CN104929999 B CN 104929999B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
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- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a full-hydraulic driving control system. The full-hydraulic driving control system comprises a hydraulic motor, a hydraulic pump, a brake and an air pump. The brake controls a switching valve in a pedal pressing manner, the air pump is connected to the switching valve through an air passage, and the hydraulic pump is equipped with an operation valve. The full-hydraulic driving control system also comprises a full-hydraulic driving integrated valve. A balance valve provided with a damper, a one-way throttle valve set provided with detachable dampers, a buffer unloading valve set, a large-diameter oil supplement valve, a reversing valve and a high-pressure selector valve are integrally assembled in the valve body of the full-hydraulic driving integrated valve. The valve body of the full-hydraulic driving integrated valve is at least provided with an A1 port and a B1 port which are used for connecting the hydraulic motor, an A port and a B port which are used for connecting the operation valve, and a C port, an MU port, a T port and a K port which are used for connecting the switching valve. According to the invention, problems that the hydraulic impact is large, oil is fully absorbed, and the noise is loud in a braking process of a full-hydraulic wheel excavator and a loader can be effectively solved, and the system is wild in vehicle starting and stopping, is safe and energy-saving, and is high in controllability.
Description
Technical field
The present invention relates to the hydraulic control technology of engineering machinery, in particular for hydraulic moving wheel excavator, loader
A kind of hydraulic moving control system, specifically a kind of all-hydraulic traveling control system.
Background technology
What most wheel excavator and loader adopted at present is all machine-walking pattern, and both tire passes through to drive
Bridge, change speed gear box etc. are directly driven by diesel engine.Due to its exist energy consumption big, handling bad the shortcomings of, therefore domestic and international producer
All seek a kind of all-hydraulic walking pattern control method, all-hydraulic walking both adopt variable piston motor by drive axle Lai
The pattern of tire on the drive wheels walking.But in prior art, due to lacking the combination control of respective valve in all-hydraulic traveling control system
System, thus it is also easy to lead to following problem: one is in equipment docking process, and hydraulic system and mechanical braking system are divided completely
From leading to the parking stability of equipment poor.Two be lead to during brake (parking) hydraulic shock greatly, fluid is emptied and noise
Greatly.With present on problem not only reduce the maneuverability of system, but also very big peace can be left to excavator or loader
Full hidden danger, leads to current all hydraulic wheel type excavator and the development of loader to receive very big impact.
Content of the invention
The technical problem to be solved is for above-mentioned state of the art, and provides and start soft, peace of stopping
Full energy-conservation, handling good and be avoided that a kind of all-hydraulic traveling control system that motor hydraulic pressure is emptied.
The present invention solves the technical scheme that adopted of above-mentioned technical problem: all-hydraulic traveling control system, including for
The hydraulic motor of hoofing part and the hydraulic pump providing hydraulic power for hydraulic motor, and brake and air pump, brake is stepped on
Voltage-controlled be formed with switching valve, air pump is connected with switching valve through gas circuit, and hydraulic pump is furnished with manipulation valve；In all-hydraulic traveling control system
It is additionally provided with by the highly integrated all-hydraulic walking pile-up valve constituting small-sized hydraulic system control unit, this all-hydraulic walking pile-up valve
Valve body in integrated be assembled with the balanced valve with damping, the one-way throttle valve group of the detachable damping of band, buffering off-load valve group, great Kou
Footpath Fill valve, reversal valve and high selector relay, and all-hydraulic walking pile-up valve valve body be at least formed with for connecting hydraulic pressure horse
The a1 mouth reaching and b1 mouth, a mouth and b mouth, c mouth and mu mouth, t mouth and k mouth for connecting switching valve for connecting manipulation valve.
For optimizing technique scheme, the measure taken also includes:
Above-mentioned manipulation valve manipulates valve for 3-position 4-way, and the pump oil mouth of hydraulic pump is connected with the first port manipulating valve,
Second port of this manipulation valve is connected with oil sump tank, and the third connectivity mouth manipulating valve is connected with a mouth, manipulates the 4th port and the b of valve
Mouth connection；Hydraulic pump connection manipulates and is provided with unloader on the conduit under fluid pressure of valve.
Above-mentioned switching valve is two-position three-way switching valve, and the compressed air outlet of air pump is connected with the first blow vent of switching valve
Connect, the second blow vent of switching valve is gas vent, and the 3rd blow vent of this switching valve is connected with c mouth, the compression that air pump pumps out
Air promotes integrated changing in all-hydraulic walking pile-up valve through switching valve and c implication after switching Vavle switching is trampled in brake successively
Slide to valve and commutate；In gas circuit between this air pump connection switching valve, safety air release valve is installed.
Above-mentioned heavy caliber Fill valve is made up of the first heavy caliber check valve being oppositely arranged and the second heavy caliber check valve；
The public oil inlet end of the first heavy caliber check valve and the second heavy caliber check valve is communicated with oil feeding reservoir through mu mouth, the first heavy caliber list
Connect a1 mouth to the oil outlet end of valve, the oil outlet end of the second heavy caliber check valve is connected with b1 mouth.
Above-mentioned reversal valve is two two logical reversal valves, and the first hydraulic fluid port of this reversal valve is communicated with a1 mouth, the of reversal valve
Two hydraulic fluid ports are communicated with b1 mouth, when compressed air that air pump pumps out promotes reversal valve commutation, a1 mouth and b1 mouth through reversal valve first
Hydraulic fluid port and the second hydraulic fluid port are interconnected；Reversal valve has prevents hydraulic fluid leak from affecting reversal valve unlatching pressure to reversal valve valve pocket
The drain tap of power, this drain tap is connected with oil sump tank through t mouth.
Above-mentioned buffering off-load valve group includes being used for when hydraulic motor switchs to pump condition by motor operating conditions buffering off-load a1
The first of the hydraulic oil that mouth produces buffers unloader and is used for when hydraulic motor switchs to pump condition by motor operating conditions buffering off-load
Second buffering unloader of the hydraulic oil that b1 mouth produces, the first pressure hydraulic fluid port of the first buffering unloader is communicated with a1 mouth, and this
First off-load hydraulic fluid port of one buffering unloader is communicated with b1 mouth, and the second pressure hydraulic fluid port of the second buffering unloader is communicated with b1 mouth,
Second off-load hydraulic fluid port of this second buffering unloader is communicated with a1 mouth；First buffering unloader and the second buffering unloader set side by side
Put the two-stage buffering unloader constituting control system.
The above-mentioned balanced valve with damping is the 3-position 4-way balanced valve being machined with guide oil damping hole in balance valve core, first
Oil Guide damping hole includes left guide oil damping hole and right guide oil damping hole；This band damping the first balance valve of balanced valve with
A mouth is connected, and the second balance valve of the balanced valve with damping is connected with b mouth, the 3rd balanced valve of the balanced valve with damping
Mouth is connected with a1, and the 4th balance valve of the balanced valve with damping is connected with b1 mouth；The left guide of the balanced valve with damping
Hydraulic fluid port is connected with a mouth, and right guide's hydraulic fluid port of the balanced valve with damping is connected with b mouth.
The one-way throttle valve group of the detachable damping of above-mentioned band include can one-way conduction a mouth to hydraulic channel between a1 mouth by liquid
The hydraulic oil of press pump output is delivered to the one-way throttle valve of the detachable damping of first band of hydraulic motor, and can one-way conduction b
Mouthful to hydraulic channel between b1 mouth the hydraulic oil that hydraulic pump exports is delivered to hydraulic motor the detachable damping of the second band unidirectional
Choke valve；The one-way throttle valve of the one-way throttle valve of the detachable damping of first band and the detachable damping of the second band is by check valve
It is arranged on the replaceable damping can be changed according to system damping size needs in the valve element of check valve with using spiral way
Composition.
The center control port of above-mentioned high selector relay is interlinked with k mouth by the first damping, this high selector relay
Left control port is connected with a mouth, and the right control port of high selector relay is connected with b mouth.
Above-mentioned all-hydraulic walking pile-up valve is also machined with ma mouth and mb mouth, ma mouth and a mouth phase for output control oil
Connection, mb mouth is connected with b mouth.
The advantage of control system of the present invention and its have the beneficial effect that:
1st, system is provided with k mouth, ma mouth, mb mouth and high selector relay, to needing to quote hydraulic oil as controlling oil to provide
Convenience.
2nd, being provided with the balanced valve with damping in system makes the system more steady in handoff procedure, it is to avoid the pressure punching of hydraulic pressure
Hit, the balanced valve being damped by band in simultaneity factor is combined using with the one-way throttle valve group of the detachable damping of band, can enter
One step ground eliminates the pressure vibration problem that system switching causes.
3rd, it is provided with the two-stage buffering unloader being made up of the first buffering unloader and the second buffering unloader in system, can be more
Good protects to system oil-way, particularly start and stopped process in, can effectively weaken pressure peak, make be entirely
System stability is more preferable.
4th, the present invention passes through the heavy caliber Fill valve of setting in system, can thoroughly solve hydraulic motor in motor operating conditions to pump
The confession shortage of oil problem occurring during change working, thus avoid the emptying phenomenon of hydraulic motor.
5th, the control system of the present invention adopts the mechanical brake linkage in switching valve and vehicle, when brake stops
When, reversal valve can the compressed air of air pump promote to descend to commutate again, realizes the direct insertion of a1 mouth and b1 mouth, so as to make entirely to stop
Car process is more steady, and avoids the fluid of hydraulic motor well and be emptied problem.
Brief description
Fig. 1 is the hydraulic principle schematic diagram of the present invention.
Specific embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in further detail.
Fig. 1 is the hydraulic principle schematic diagram of the present invention.
Reference therein is: all-hydraulic walking pile-up valve f, air pump q, hydraulic motor m, safety air release valve n, unloader
X, hydraulic pump y, brake z, switching valve 1, manipulation valve 2, the balanced valve 3 with damping, left guide oil damping hole 3a, the resistance of right guide oil
One-way throttle valve 42, first buffering of the detachable damping of one-way throttle valve 41, second band of the detachable damping of Buddhist nun hole 3b, first band
Unloader 51, second buffering unloader 52, heavy caliber Fill valve 6, the first heavy caliber check valve 61, the second bore check valve 62,
Reversal valve 7, high selector relay 8, first damping 81.
As shown in figure 1, the all-hydraulic traveling control system of the present invention, including for the hydraulic motor m of hoofing part be
Hydraulic motor m provides the hydraulic pump y of hydraulic power, and brake z and air pump q, the liquid that hydraulic motor m pumps out in hydraulic pump y
Rotate in the presence of force feed, hydraulic motor m rotation driving wheel excavator or loader again, to realize wheel excavator or loading
The all-hydraulic walking mode of machine, brake z is the mechanical braking part that wheel excavator or loader use when stopping or braking,
Brake z is controlled by the way of foot-operated jamming on, and brake z trampling controls switching valve 1, and air pump q is through gas circuit and switching valve 1 phase
Connect, hydraulic pump y is furnished with manipulation valve 2；It is additionally provided with all-hydraulic traveling control system by highly integrated composition small-sized hydraulic system
The all-hydraulic walking pile-up valve f of control unit, in the valve body of this all-hydraulic walking pile-up valve f integrated be assembled with damping balance
The one-way throttle valve group of the detachable damping of valve 3, band, buffering off-load valve group, heavy caliber Fill valve 6, reversal valve 7 and high selector relay
8, and the valve body of all-hydraulic walking pile-up valve f is at least formed with a1 mouth for connecting hydraulic motor m and b1 mouth, for connecting behaviour
The a mouth of vertical valve 2 and b mouth, c mouth and mu mouth, t mouth and k mouth for connecting switching valve 1.The valve body of all-hydraulic walking pile-up valve f
Inside also it is machined with main hydraulic pressure runner and auxiliary oil channel, be integrated between each corresponding valve in valve body with guarantee or each valve is corresponding to it
Connector between connection need.
Manipulate valve 2 and manipulate valve for 3-position 4-way, the pump oil mouth of hydraulic pump y is connected with the first port manipulating valve 2, this behaviour
Second port of vertical valve 2 is connected with oil sump tank, and the third connectivity mouth manipulating valve 2 is connected with a mouth, manipulates the 4th port and the b mouth of valve 2
Connection.From figure 1 it appears that when manipulation valve 2 is in middle position, a mouth connects back with b mouth all the second ports through manipulating valve 2
Fuel tank, the pump oil mouth of hydraulic pump y is now in off state, i.e. the state of fuel cut-off.When manipulation valve 2 is in left position, liquid
The pump oil mouth of press pump y is then connected with a mouth through manipulating valve 2, and b mouth then connects oil sump tank through the second port, is in when manipulating valve 2
During right position, the pump oil mouth of hydraulic pump y is then connected with b mouth through manipulating valve 2, and a mouth then connects oil sump tank through the second port.This
The bright supply direction that can change the hydraulic oil that hydraulic pump y pumps out by manipulating the left and right action of valve 2, such that it is able to realize hydraulic pressure
The forward and reverse rotation of motor m, to realize the advance of wheel excavator and loader or the needs of retrogressing.In order to improve the peace of system
Quan Xing, hydraulic pump y connect to be provided with the conduit under fluid pressure manipulating valve 2 prevents system hydraulic pressure too high with unit each in protection system
Part unloader x without prejudice, hydraulic pressure too high exceed setting value when, hydraulic oil can directly after unloader x off-load
It flow back in oil sump tank.
Switching valve 1 in this control system is two-position three-way switching valve, the compressed air outlet of air pump q and switching valve 1
First blow vent connects, and the second blow vent of switching valve 1 is gas vent, and the 3rd blow vent of this switching valve 1 is connected with c mouth,
The compressed air that air pump q pumps out promotes all-hydraulic row through switching valve 1 and c implication after brake z tramples switching valve 1 switching successively
Walk integrated reversal valve 7 slip commutation in pile-up valve f；In gas circuit between this air pump q connection switching valve 1, safety air release valve is installed
n.From figure 1 it appears that the 3rd blow vent through switching valve 1 for the c mouth is connected with the second blow vent, thus connecting outside under normal shape
Ambient air, and now the first blow vent of switching valve 1 is then off-state, when brake z tramples braking, brake z's
Push rod can promote switching valve 1 action to commutate, and so that the first blow vent of switching valve 1 is connected with the 3rd blow vent of switching valve 1, thus
Enable compressed air to enter c mouth through switching valve 1, promote reversal valve 7 action in the way of pneumatic, it is achieved thereby that reversal valve 7
Commutation.It is machined with the air flue of connection reversal valve 7 and c mouth in the valve body of all-hydraulic walking pile-up valve f.In order to ensure that air pump q can be just
Often work, prevent that air pressure is too high to cause danger or infringement equipment, the safety air release valve n that can ensure safety is installed in gas circuit.
In the system, the balanced valve 3 with damping is the 3-position 4-way balance being machined with guide oil damping hole in balance valve core
Valve, the balanced valve 3 with damping be formed with can promote left guide's oil pocket of moving right of balance valve core of the balanced valve 3 with damping with
Promote right guide's oil pocket that balance valve core moves right, above-mentioned guide oil damping hole includes the connection being formed with balance valve core
The left guide oil damping hole 3a of the left guide's oil pocket and right guide oil damping hole 3b connecting right guide's oil pocket；The balance of this band damping
First balance valve of valve 3 is connected with a mouth, and the second balance valve of the balanced valve 3 with damping is connected with b mouth, band damping
The 3rd balance valve of balanced valve 3 be connected with a1, the 4th balance valve of the balanced valve 3 with damping is connected with b1 mouth；
Left guide's hydraulic fluid port of the balanced valve 3 with damping is connected with a mouth, and right guide's hydraulic fluid port of the balanced valve 3 with damping is connected with b mouth
Logical.Balanced valve 3 with damping can make the system more steady in handoff procedure, it is to avoid the compression shock of hydraulic pressure is it is ensured that be
The soft ride comfort that system starts and stops.Can see from Fig. 1 of the present invention, when the balanced valve 3 with damping is in interposition
When, the first balance valve, the second balance valve, the 3rd balance valve, the 4th balance valve are off-state, when with damping
When balanced valve 3 is in left position, now the 4th balance valve is connected with the second balance valve, makes hydraulic motor m be in the pressure of b1 mouth
Power oil can return in oil sump tank through the balanced valve 3 with damping, b mouth and manipulation valve 2.When the balanced valve 3 with damping is in right position,
The pressure oil of a1 mouth can be made to flow back in oil sump tank now by the balanced valve 3 with damping and manipulation valve 2.
Carry in the system detachable damping one-way throttle valve group include can one-way conduction a mouth will to hydraulic channel between a1 mouth
The hydraulic oil of hydraulic pump y output is delivered to the one-way throttle valve 41 of the detachable damping of first band of hydraulic motor m, and can be unidirectional
The hydraulic oil that hydraulic pump y export is delivered to the detachable damping of the second band of hydraulic motor m to hydraulic channel between b1 mouth by conducting b mouth
One-way throttle valve 42；The one-way throttle valve 41 of the detachable damping of first band and the one-way throttle valve of the detachable damping of the second band
42 are arranged in the valve element of check valve and can need to be changed according to system damping size by check valve with using spiral way
Replaceable damping composition.The balanced valve being damped by band in the system of the present invention detachable one-way throttle valve group damping with band
It is combined using, can further eliminate the pressure vibration problem that system switching causes.
The heavy caliber Fill valve 6 of the present invention is by the first heavy caliber check valve 61 being oppositely arranged and the second heavy caliber check valve
62 compositions；Heavy caliber check valve preferably can act the effect of falling repairing, prevents hydraulic motor m to be emptied.First heavy caliber check valve 61
It is communicated with oil feeding reservoir, the oil outlet end of the first heavy caliber check valve 61 with the public oil inlet end of the second heavy caliber check valve 62 through mu mouth
Connection a1 mouth, the oil outlet end of the second heavy caliber check valve 62 is connected with b1 mouth.As shown in figure 1, when the a1 mouth of hydraulic motor m goes out
During existing negative pressure, now the hydraulic oil in oil feeding reservoir can be through the first heavy caliber check valve 61 repairing, when the b1 mouth of hydraulic motor m occurs
During negative pressure, now the hydraulic oil in oil feeding reservoir can be through the second heavy caliber check valve 62 repairing.The present invention is provided with bigbore repairing
Valve, can thoroughly solve the problems, such as the confession shortage of oil that hydraulic motor m occurs during motor operating conditions are to pump condition conversion, thus keeping away
Exempt from the emptying phenomenon of hydraulic motor m.
Reversal valve 7 is two two logical reversal valves, and the first hydraulic fluid port of this reversal valve 7 is communicated with a1 mouth, the second oil of reversal valve 7
Mouth is communicated with b1 mouth, when the compressed air that air pump q pumps out promotes reversal valve 7 commutation, a1 mouth and b1 mouth the first oil through reversal valve 7
Mouth and the second hydraulic fluid port are interconnected；Reversal valve 7 has to be prevented from hydraulic fluid leak from affecting reversal valve 7 to reversal valve 7 valve pocket opening
The drain tap of pressure, this drain tap is connected with oil sump tank through t mouth.The control system of the present invention adopts on switching valve 1 and vehicle
Mechanical brake z linkage, when brake z Brake stop, reversal valve 1 can air pump q again compressed air promote lower commutate, real
Existing a1 mouth and the direct insertion of b1 mouth, so as to make whole docking process more steady, and avoid hydraulic motor m well
Fluid be emptied problem.
The buffering off-load valve group of the present invention includes being used for when hydraulic motor switchs to pump condition by motor operating conditions buffering off-load
The first of the hydraulic oil that a1 mouth produces buffers unloader 51 and is used for when hydraulic motor switchs to pump condition by motor operating conditions buffering
Second buffering unloader 52 of the hydraulic oil that off-load b1 mouth produces, the first pressure hydraulic fluid port of the first buffering unloader 51 and a1 mouth phase
Logical, the first off-load hydraulic fluid port of this first buffering unloader 51 is communicated with b1 mouth, the second pressure hydraulic fluid port of the second buffering unloader 52
Communicate with b1 mouth, the second off-load hydraulic fluid port of this second buffering unloader 52 is communicated with a1 mouth；First buffering unloader 51 and second
Buffering unloader 52 is set up in parallel the two-stage buffering unloader constituting control system.It is provided with the system of the present invention and delayed by first
Rush unloader and the two-stage buffering unloader of the second buffering unloader composition, can preferably system oil-way be protected, especially
It is in startup and stopped process, effectively can weaken pressure peak, make whole system stability more preferable.
All-hydraulic walking pile-up valve f is also machined with the ma mouth and mb mouth for output control oil, and ma mouth is connected with a mouth,
Mb mouth is connected with b mouth, and the center control port of high selector relay 8 is interlinked with k mouth by the first damping 81, and this high pressure selects
The left control port of valve 8 is connected with a mouth, and the right control port of high selector relay 8 is connected with b mouth.System be provided with k mouth,
Ma mouth, mb mouth and high selector relay, can be to needing to quote hydraulic oil as controlling oil to provide conveniently.
The control principle of the present invention is as follows:
When the 1st, starting when the left position manipulating valve 2 is switched to operating position, hydraulic pump y hydraulic oil out passes through to manipulate valve
2 left position enters a mouth of all-hydraulic walking pile-up valve f, and the inner flow passage through all-hydraulic walking pile-up valve f for the hydraulic oil pushes first open
The one-way throttle valve 41 of the detachable damping of band enters into the a1 mouth of hydraulic motor m, promotes hydraulic motor m rotation；A part simultaneously
The left guide oil damping hole 3a through the balanced valve 3 with damping for the hydraulic oil enters left guide's oil pocket, promotes balance valve core to move right,
The left position of the balanced valve 3 of band damping is made to be in working position.The hydraulic oil after hydraulic motor m rotary work is promoted to pass through b1 mouth, then
Return to the b mouth of all-hydraulic walking pile-up valve f through the left position of the balanced valve 3 with damping, return to fuel tank by manipulating valve 2.By
It is provided with guide oil damping hole in system, therefore the mobile of balance valve core is slightly later than hydraulic motor m rotary work, makes the liquid of b1 mouth
Pressure energy keeps certain pressure, thus ensure that the stationarity of system start-up, and mildness.When the right position switching manipulating valve 2
During to operating position, its operation principle and the left position manipulating valve 2 are switched to identical during operating position, and when different, oil inlet and oil return walks
To difference, the direction of rotation of hydraulic motor m is different, so that wheel excavator and loading function are advanced or retreated.
When braking in the 2nd, advancing: manipulate valve 2 and return to middle position, manipulate valve 2 in middle position because a mouth is also connect with oil sump tank
Logical, left guide's oil pocket of the balanced valve 3 therefore with damping also makes thrust because oil sump tank connects, and leads to balance valve core also to recover
To middle position, now a1 and a mouth and b1 mouth carry detachable resistance with b mouth in the one-way throttle valve 41 and second of the detachable damping of first band
The lower oil circuit of one-way throttle valve 42 effect of Buddhist nun is cut off, and now has two kinds of situations:
A, mechanical brake z do not step down: hydraulic oil is in the one-way throttle valve group of balance valve core and the detachable damping of band
In the presence of, the a1 mouth of hydraulic motor m and b1 mouth oil circuit are closed, and, due to rotator inertia, hydraulic motor m is by horse for hydraulic motor m
Reaching change working is pump condition, and now the b1 degree of lip-rounding becomes high pressure chest, and in the presence of high pressure chest, hydraulic motor m stops slowly,
In this process, by the second buffering unloader 52 off-load, simultaneity factor passes through mu mouth and heavy caliber repairing to partial high pressure oil
First heavy caliber check valve 61 of valve 6 carries out repairing to a1 mouth, it is to avoid oil circuit is emptied.
B, mechanical brake step down: hydraulic oil is in the effect of balance valve core and the one-way throttle valve group of the detachable damping of band
Under, the a1 mouth of hydraulic motor m and b1 mouth oil circuit are disconnected with a mouth and b mouth, hydraulic motor m due to rotator inertia, hydraulic motor m by
Motor operating conditions are converted to pump condition, and after mechanical brake z steps down, switching valve 1 starts to commutate, and the compressed air of air pump q passes through c
Mouth promotion reversal valve 7 commutates, and now the a1 mouth of hydraulic motor m is directly connected with b1 mouth, in the presence of mechanical brake z, liquid
Pressure motor m stops slowly, and in this process, will not form hydraulic oil, and simultaneity factor passes through mu mouth and heavy caliber Fill valve 6
The first heavy caliber check valve 61 carry out repairing to a1 mouth, avoid oil circuit to be emptied.
3rd, stop: whole loom after a stoppage, the one-way throttle valve group that detachably damps in balanced valve 3 and the band of band damping
Under effect, the a1 mouth of hydraulic motor m and the oil circuit of b1 mouth be cut off it is ensured that whole loom can be very stable be parked in former
Ground.
4th, descending in advancing: during this, the one-way throttle valve group of the balanced valve 3 with damping and the detachable damping of band
It is applied in combination, can effectively control the rotary speed of hydraulic motor m it is ensured that hydraulic motor m does not exceed the speed limit, not be emptied.
Claims (6)
1. all-hydraulic traveling control system, provides hydraulic pressure including the hydraulic motor (m) for hoofing part with for hydraulic motor (m)
The hydraulic pump (y) of power, and brake (z) and air pump (q), is characterized in that: described brake (z) trampling controls switching
Valve (1), described air pump (q) is connected with switching valve (1) through gas circuit, and described hydraulic pump (y) is furnished with manipulation valve (2)；Full liquid
It is additionally provided with by the highly integrated all-hydraulic walking pile-up valve constituting small-sized hydraulic system control unit in pressure traveling control system
(f), the list that in the valve body of this all-hydraulic walking pile-up valve (f), the integrated balanced valve (3) being assembled with band damping, band detachably damp
To throttling valve group, buffering off-load valve group, heavy caliber Fill valve (6), reversal valve (7) and high selector relay (8), and all-hydraulic row
The valve body walking pile-up valve (f) is at least formed with a1 mouth and b1 mouth, a for connecting manipulation valve (2) for connecting hydraulic motor (m)
Mouthful and b mouth, be used for the mu mouth, t mouth and the k mouth that connect the c mouth of switching valve (1) and be used for connecting heavy caliber Fill valve (6)；Described
Switching valve (1) be two-position three-way switching valve, the first blow vent of the compressed air outlet of described air pump (q) and switching valve (1)
Connect, the second blow vent of described switching valve (1) is gas vent, and the 3rd blow vent of this switching valve (1) is connected with c mouth,
The compressed air that described air pump (q) pumps out is after switching valve (1) switching is trampled in brake (z) successively through switching valve (1) and c implication
Promote integrated reversal valve (7) in all-hydraulic walking pile-up valve (f) to slide to commutate；This air pump (q) connects the gas between switching valve (1)
Safety air release valve (n) is installed in road；Described heavy caliber Fill valve (6) is by the first heavy caliber check valve (61) being oppositely arranged
Form with the second heavy caliber check valve (62)；Described first heavy caliber check valve (61) and the public affairs of the second heavy caliber check valve (62)
Altogether oil inlet end is communicated with oil feeding reservoir through mu mouth, the oil outlet end connection a1 mouth of described first heavy caliber check valve (61), and described second
The oil outlet end of heavy caliber check valve (62) is connected with b1 mouth；Described reversal valve (7) is two two logical reversal valves, this reversal valve
(7) the first hydraulic fluid port is communicated with a1 mouth, and the second hydraulic fluid port of reversal valve (7) is communicated with b1 mouth, and the compression that described air pump (q) pumps out is empty
When gas promotes reversal valve (7) commutation, the first hydraulic fluid port through reversal valve (7) of a1 mouth and b1 mouth and the second hydraulic fluid port are interconnected；Described
Reversal valve (7) there is the drain tap preventing hydraulic fluid leak from affecting reversal valve (7) Opening pressure to reversal valve (7) valve pocket,
This drain tap is connected with oil sump tank through t mouth；Described buffering off-load valve group includes switching to pump in hydraulic motor by motor operating conditions
It is used for during operating mode buffering the first buffering unloader (51) of the hydraulic oil of off-load a1 mouth generation and in hydraulic motor by motor operating conditions
Switch to the second buffering unloader (52) being used for the hydraulic oil buffering the generation of off-load b1 mouth during pump condition, the first described buffering is unloaded
The first pressure hydraulic fluid port of lotus valve (51) is communicated with a1 mouth, this first buffering unloader (51) the first off-load hydraulic fluid port and b1 mouth phase
Logical, the second pressure hydraulic fluid port of the second described buffering unloader (52) communicates with b1 mouth, and this second buffers the of unloader (52)
Two off-load hydraulic fluid ports are communicated with a1 mouth；The first described buffering unloader (51) and the second buffering unloader (52) are set up in parallel composition
The two-stage buffering unloader of control system.
2. all-hydraulic traveling control system according to claim 1, is characterized in that: described manipulation valve (2) is three four
Logical manipulation valve, the pump oil mouth of described hydraulic pump (y) is connected with the first port manipulating valve (2), and the second of this manipulation valve (2) leads to
Mouth is connected with oil sump tank, and the third connectivity mouth of described manipulation valve (2) is connected with a mouth, manipulates the 4th port of valve (2) with b mouth even
Logical；Described hydraulic pump (y) connection manipulates and is provided with unloader (x) on the conduit under fluid pressure of valve (2).
3. all-hydraulic traveling control system according to claim 1, is characterized in that: the described balanced valve (3) with damping
For being machined with the 3-position 4-way balanced valve of guide oil damping hole in balance valve core, described guide oil damping hole includes left guide oil
Damping hole (3a) and right guide oil damping hole (3b)；First balance valve of the balanced valve (3) of this band damping is connected with a mouth,
Second balance valve of the balanced valve (3) with damping is connected with b mouth, and the 3rd of the described balanced valve (3) with damping balances
Valve port is connected with a1 mouth, and the 4th balance valve of the balanced valve (3) with damping is connected with b1 mouth；The described balance with damping
Left guide's hydraulic fluid port of valve (3) is connected with a mouth, and right guide's hydraulic fluid port of the described balanced valve (3) with damping is connected with b mouth.
4. all-hydraulic traveling control system according to claim 1, is characterized in that: it is unidirectional that described band detachably damps
Throttling valve group includes to hydraulic channel between a1 mouth, the hydraulic oil that hydraulic pump (y) exports being delivered to hydraulic pressure horse by one-way conduction a mouth
Reach the one-way throttle valve (41) of the detachable damping of first band of (m), and can one-way conduction b mouth to hydraulic channel between b1 mouth by liquid
The hydraulic oil that press pump (y) exports is delivered to the one-way throttle valve (42) of the detachable damping of the second band of hydraulic motor (m)；Described
The one-way throttle valve (42) of the one-way throttle valve (41) of the detachable damping of first band and the detachable damping of the second band is by unidirectional
Valve and be arranged in the valve element of check valve and the replaceable resistance that be changed can be needed according to system damping size using spiral way
Buddhist nun forms.
5. all-hydraulic traveling control system according to claim 1, is characterized in that: in described high selector relay (8)
Heart control port is interlinked with k mouth by the first damping (81), and the left control port of this high selector relay (8) is connected with a mouth,
The right control port of high selector relay (8) is connected with b mouth.
6. all-hydraulic traveling control system according to claim 1, is characterized in that: described all-hydraulic walking pile-up valve
F () is also machined with the ma mouth and mb mouth for output control oil, described ma mouth is connected with a mouth, described mb mouth and b mouth phase
Connection.
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| CN201510366049.3A CN104929999B (en) | 2015-06-29 | 2015-06-29 | Full-hydraulic driving control system |
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| CN201510366049.3A CN104929999B (en) | 2015-06-29 | 2015-06-29 | Full-hydraulic driving control system |
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| CN104929999B true CN104929999B (en) | 2017-02-01 |
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| CN105909578A (en) * | 2016-06-02 | 2016-08-31 | 江苏大学 | Hydraulic system of stern operation platform |
| CN106321536A (en) * | 2016-11-08 | 2017-01-11 | 江苏柳工机械有限公司 | Self-walking shears-fork type high-altitude operation platform walking hydraulic system |
| CN110043523B (en) * | 2018-01-17 | 2022-01-21 | 潍柴雷沃重工股份有限公司 | Air suction prevention hydraulic system and air suction prevention method for hydraulic system |
| CN110593345A (en) * | 2019-09-24 | 2019-12-20 | 符鹏 | Rotation buffering device for excavator |
| CN110671496A (en) * | 2019-10-16 | 2020-01-10 | 福建晋工机械有限公司 | Automatic variable walking motor assembly, hydraulic driving walking control system and application thereof |
| CN113653695B (en) * | 2021-08-30 | 2023-08-25 | 杭州力龙液压有限公司 | Balancing valve structure and engineering machinery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100208728B1 (en) * | 1996-06-29 | 1999-07-15 | 토니헬샴 | Driving connecting device for heavy-armed construction |
| JP2000274402A (en) * | 1999-03-25 | 2000-10-03 | Hitachi Constr Mach Co Ltd | Hydraulic traveling working vehicle |
| JP4364476B2 (en) * | 2002-03-05 | 2009-11-18 | コベルコクレーン株式会社 | Hydraulic travel device |
| JP2005214327A (en) * | 2004-01-30 | 2005-08-11 | Aichi Corp | Brake device of hydraulic motor |
| CN201031346Y (en) * | 2007-01-19 | 2008-03-05 | 江苏骏马压路机械有限公司 | Trinity hydraulic system of hydraulic road roller |
| JP5389461B2 (en) * | 2008-03-05 | 2014-01-15 | ナブテスコ株式会社 | Hydraulic motor |
| CN104627160A (en) * | 2015-02-13 | 2015-05-20 | 湖南五新重型装备有限公司 | Hydraulic walking control system for engineering vehicle |
| CN204805191U (en) * | 2015-06-29 | 2015-11-25 | 宁波精垦液压有限公司 | All -hydraulic walking control system |
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Effective date of registration: 20230105 Address after: No. 128, Linyu North Road, Jiaochuan Street, Zhenhai District, Ningbo, Zhejiang 315000 Patentee after: Zhejiang Hongsheng Precision Machinery Co.,Ltd. Address before: No. 21, Chuang e Huigu, No. 777, Zhongguan West Road, Zhuangshi Street, Zhenhai District, Ningbo City, Zhejiang Province 315200 Patentee before: NINGBO JINGKEN HYDRAULIC PRESSURE CO.,LTD. |