CN107237789B - Hydraulic system and creeper undercarriage with the hydraulic system - Google Patents
Hydraulic system and creeper undercarriage with the hydraulic system Download PDFInfo
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- CN107237789B CN107237789B CN201710567417.XA CN201710567417A CN107237789B CN 107237789 B CN107237789 B CN 107237789B CN 201710567417 A CN201710567417 A CN 201710567417A CN 107237789 B CN107237789 B CN 107237789B
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- Prior art keywords
- valve
- running motor
- hydraulic fluid
- fluid ports
- liquid outlet
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- 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
- F15B11/22—Synchronisation of the movement of two or more servomotors
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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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/07—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors in distinct sequence
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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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
Abstract
A kind of hydraulic system and creeper undercarriage, including hydraulic pump, running motor and reversal valve, the running motor includes left running motor and right running motor, the reversal valve includes left reversal valve and right reversal valve, the hydraulic pump is connected by the left reversal valve with the left running motor, the hydraulic pump is connected by the right reversal valve with the right running motor, the hydraulic system further includes synchronizing sequence valve, when the left running motor and the right running motor are in advance or are in fallback state, the left front inlet of the left running motor is connected to inlet before the right side of the right running motor, the left front liquid outlet of the left running motor is connected to liquid outlet before the right side of the right running motor.The hydraulic system simply and reliablely improves the synchronism of left and right running motor, simple in structure, cost is relatively low by increasing synchronizing sequence valve between two running motors.
Description
Technical field
The present invention relates to engineering machinery field, especially a kind of hydraulic system and the crawler travel machine with the hydraulic system
Structure.
Background technology
In the prior art, the walking mechanism for engineering machinery of walking is mostly crawler type walking mechanism, crawler type walking mechanism
Generally use hydraulic system is driven.Fig. 1 show the structural schematic diagram of hydraulic system in the prior art.As shown in Figure 1, liquid
Pressure system includes hydraulic pump 91, running motor 92, reversal valve 93 and pilot valve 94.Running motor 92 includes control left track row
The right running motor 922 of the left running motor 921 and control right side track walking walked；Reversal valve 93 includes controlling left running motor
921 left reversal valve 931 and the right reversal valve 932 for controlling right running motor 922；Pilot valve 94 includes left front pilot valve 941, a left side
Afterwards pilot valve 942, it is right before pilot valve 944 behind pilot valve 943 and the right side.
Hydraulic pump 91 is connected by left reversal valve 931 with left running motor 921, and is walked with right lateral by right reversal valve 932
Motor 922 is connected.Left reversal valve 931 and right reversal valve 932 include advance working position, retreat working position and intermediate working position.
Left front pilot valve 941 and left back pilot valve 942 control the transformation that left reversal valve 931 carries out working position respectively, when left front pilot valve
941 when being pulled down into, and left reversal valve 931 is switched to advance working position, and left running motor 921 drives crawler belt to move forwards, when left back
When pilot valve 942 is pulled down into, left reversal valve 931 is switched to retrogressing working position, and left running motor 921 drives crawler belt to move forwards.
Similarly, pilot valve 944 controls the transformation that right reversal valve 932 carries out working position respectively behind pilot valve 943 and the right side before right.
In the prior art, in order to realize the speed governing of left and right crawler travel, the reversal valve 93 of use, which can generally have, to be compensated
Function so that hydraulic pump 91, by the fuel feeding that the opening degree of reversal valve 93 is proportional, commutates within the scope of maximum stream flow however, adjusting
Although the change output flow that the opening degree of valve 93 can be linear, on this basis, in order to realize the synchronization of left and right walking, especially
It is the synchronization when engineering machinery moves forward or back, it is necessary to which left and right reversal valve 931,932 is opened simultaneously, and keeps aperture
Unanimously.
On existing Process ba- sis, reversal valve 93 will produce certain error in the fabrication process, which makes a left side change
Deviation occurs to the commutation resistance of valve 931 and right reversal valve 932 so that the pilot pressure that needs and differ when reversal valve 93 is opened
It causes, under identical pilot pressure, the opening degree of left and right reversal valve 931,932 is inconsistent, and when work passes through 93 hydraulic oil of reversal valve
Flow also will produce difference.
Meanwhile pilot valve 94 equally will produce error in the production process, which makes the output pressure of pilot valve 94
It is inconsistent, directly the opening degree of reversal valve 93 can be caused inconsistent.
Further, it when operating reversal valve 93, needs one people of staff while manipulating two operation handles, because
This, the error of two operation handles is unavoidable, and the pressure that pilot valve 94 exports can equally occur inconsistent.
The flow that the accumulation of above-mentioned multiple errors can cause entry into the hydraulic oil of left and right running motor 921,922 is different, meeting
Cause the asynchronous, inconsistent of left and right crawler track speeds.
To reduce the error of reversal valve 93 and pilot valve 94 in the production process, this needs the making essence for improving parts
Degree, or increase complicated control element, which greatly enhances the manufacturing costs of hydraulic system；To reduce the operation of staff
Error, this can greatly increase cost of human resources.It integrates, the making of walking mechanism and operating cost can greatly increase.
Invention content
In view of this, the purpose of the present invention is to provide a kind of hydraulic system and the crawler travel machine with the hydraulic system
Structure, the hydraulic system simply and reliablely improve left and right running motor by increasing synchronizing sequence valve between two running motors
Synchronism, simple in structure, cost is relatively low.
The embodiment of the present invention provides a kind of hydraulic system, including hydraulic pump, running motor and reversal valve, the running motor
Including left running motor and right running motor, the reversal valve includes left reversal valve and right reversal valve, and the hydraulic pump passes through institute
It states left reversal valve with the left running motor to be connected, the hydraulic pump passes through the right reversal valve and the right running motor phase
Even, the hydraulic system further includes synchronizing sequence valve, and the synchronizing sequence valve includes at least the LF2 hydraulic fluid ports and LB2 positioned at side
Hydraulic fluid port, and RF2 hydraulic fluid ports and RB2 hydraulic fluid ports positioned at the other side, the left front inlet of the LF2 hydraulic fluid ports and the left running motor
It is connected, the LB2 hydraulic fluid ports are connected with the left front liquid outlet of the left running motor, the RF2 hydraulic fluid ports and the right running motor
The right side before inlet be connected, the RB2 hydraulic fluid ports are connected with liquid outlet before the right side of the right running motor, the synchronizing sequence valve packet
The first working position and the second working position are included, when the left running motor and the right running motor are in after advancing or be in
When moving back state, the synchronizing sequence valve is located at first working position, and the LF2 hydraulic fluid ports are connected to the RF2 hydraulic fluid ports, so that institute
The left front inlet for stating left running motor is connected to inlet before the right side of the right running motor, the LB2 hydraulic fluid ports and the RB2
Hydraulic fluid port is connected to, so that the left front liquid outlet of the left running motor is connected to liquid outlet before the right side of the right running motor.
Further, when the walking states of the walking states and the right running motor of the left running motor are inconsistent
When, the left running motor is not connected to the right running motor.
Further, the synchronizing sequence valve is electric change valve or pilot operated directional control valve.
Further, the synchronizing sequence valve includes the first three-position valve and the second three-position valve, first three-position valve and institute
It states the second three-position valve and includes at least four hydraulic fluid ports, first three-position valve includes the LF2 hydraulic fluid ports and LB2 hydraulic fluid ports positioned at side,
And two first transfer hydraulic fluid ports M1, M2 positioned at the other side, second three-position valve include positioned at the same side RF2 hydraulic fluid ports and
RB2 hydraulic fluid ports and two second transfer hydraulic fluid ports M3, M4 positioned at the other side, LF2 hydraulic fluid ports and the left side of first three-position valve
The left front inlet of running motor is connected, the left front liquid outlet of the LB2 hydraulic fluid ports of first three-position valve and the left running motor
It is connected, the RF2 hydraulic fluid ports of second three-position valve are connected with inlet before the right side of the right running motor, second three-position valve
RB2 hydraulic fluid ports are connected with liquid outlet before the right side of the right running motor, first transfer hydraulic fluid port M1, M2 difference of first three-position valve
It is connected with second transfer hydraulic fluid port M3, M4 of second three-position valve, first three-position valve and second three-position valve include
First working position, the second working position and third working position, when first three-position valve and second three-position valve are in first
When working position, the left front inlet is connected to inlet before the right side, and the left front liquid outlet connects with liquid outlet before the right side
It is logical, when at least one in first three-position valve and second three-position valve is in the second working position or third working position,
The left running motor is not connected to the right running motor.
Further, the hydraulic system further includes pilot valve, and the pilot valve includes left front pilot valve, left back guide
Valve, it is right before pilot valve, first working position setting of first three-position valve and second three-position valve behind pilot valve and the right side
Between the second working position and third working position, elder generation is both provided at the both ends of first three-position valve and second three-position valve
Lead control port, two pilot control hydraulic fluid ports on one of first three-position valve and second three-position valve respectively with
The left front pilot valve and it is described it is right before pilot valve be connected, first three-position valve and second three-position valve it is wherein another on
Two pilot control hydraulic fluid ports respectively with the left back pilot valve and it is described it is right after pilot valve be connected.
Further, the synchronizing sequence valve includes a third three-position valve, is provided with and is located on the third three-position valve
The LF2 hydraulic fluid ports and LB2 hydraulic fluid ports of the same side, and RF2 hydraulic fluid ports and RB2 hydraulic fluid ports positioned at the other side, the LF2 hydraulic fluid ports and the left side
The left front inlet of running motor is connected, and the LB2 hydraulic fluid ports are connected with the left front liquid outlet of the left running motor, the RF2
Hydraulic fluid port is connected with inlet before the right side of the right running motor, the RB2 hydraulic fluid ports and liquid outlet before the right side of the right running motor
It is connected, the third three-position valve includes the first working position, the second working position and third working position, when the third three-position valve is in
When the first working position, the left front inlet is connected to inlet before the right side, goes out liquid before the left front liquid outlet and the right side
Mouth connection, when the third three-position valve is in the second working position or third working position, the left running motor and the right lateral
Motor is walked not to be connected to.
Further, the hydraulic system further includes pilot valve, and the pilot valve includes left front pilot valve, left back guide
Valve, it is right before behind pilot valve and the right side pilot valve, first working position of the third three-position valve be located at the second working position and third
Between working position, the both ends of the third three-position valve are respectively provided with that there are two pilot control hydraulic fluid port, one end of the third three-position valve
Pilot control hydraulic fluid port respectively with the left front pilot valve and it is described it is right after pilot valve be connected, the other end of the third three-position valve
Pilot control hydraulic fluid port be connected respectively with pilot valve before the left back pilot valve and the right side..
Further, the synchronizing sequence valve is two solenoid valves, and two solenoid valves are provided with LF2 hydraulic fluid ports, LB2 oil
Mouthful, RF2 hydraulic fluid ports and RB2 hydraulic fluid ports, the LF2 hydraulic fluid ports be connected with the left front inlet of the left running motor, the LB2 hydraulic fluid ports and
The left front liquid outlet of the left running motor is connected, and the RF2 hydraulic fluid ports are connected with inlet before the right side of the right running motor, institute
It states RB2 hydraulic fluid ports with liquid outlet before the right side of the right running motor to be connected, two solenoid valves include the first working position and second
Working position, when two solenoid valves are in the first working position, the left front inlet is connected to inlet before the right side, institute
It states left front liquid outlet to be connected to liquid outlet before the right side, when two solenoid valves are in the second working position, the left lateral is walked
Motor is not connected to the right running motor.
Further, the hydraulic system includes controller, left operation handle and right operation handle, and the controller receives
The signal of the left operation handle and the right operation handle, and synchronizing sequence valve is controlled according to signal, when the control
When device processed detects that the left operation handle and the right operation handle send out advance or send out backing signal, the control
Device, which controls the synchronizing sequence valve, makes the left front inlet be connected to inlet before the right side, the left front liquid outlet with it is described
Liquid outlet is connected to before the right side, when the controller detects that the signal that the left operation handle and the right operation handle are sent out differs
When cause, the controller, which controls the synchronizing sequence valve, makes the left running motor be not connected to the right running motor.
The present invention also provides a kind of creeper undercarriage, which includes hydraulic pressure system provided by the invention
System.
In conclusion the present invention increases the left running motor of control and right lateral between left running motor and right running motor
The synchronizing sequence valve for walking connected state between motor, when left running motor and right running motor are in forward travel state or retreat shape
When state, the left front inlet LF1 and left front liquid outlet LB1 of left running motor by synchronizing sequence valve respectively with right running motor
Liquid outlet RB1 connections before inlet RF1 and the right side before the right side.Under forward or backward state, even if left running motor is galloped along on horseback with right lateral
There are the difference of flow between reaching, due to the left front inlet LF1 of left running motor and feed liquor before the right side of right running motor at this time
Mouth RF1 connections, the left front liquid outlet LB1 of left running motor are connected to liquid outlet RB1 before the right side of right running motor, therefore, hydraulic pressure
Oil can be flowed by synchronizing sequence valve between left running motor and right running motor, even if actuation member is deposited in hydraulic system
In error, it can also ensure that left running motor is equal with the flow in right running motor, simply and reliablely improves left running motor
With the synchronism of right running motor, simple in structure, cost is relatively low.
Above description is only the general introduction of technical solution of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, and in order to allow the above and other objects, features and advantages of the present invention can
It is clearer and more comprehensible, it is special below to lift preferred embodiment, and coordinate attached drawing, detailed description are as follows.
Description of the drawings
Fig. 1 show the structural schematic diagram of hydraulic system in the prior art.
Fig. 2 is the structural schematic diagram for the hydraulic system that first embodiment of the invention provides.
Fig. 3 is the structural schematic diagram of sequence valve in the hydraulic system that second embodiment of the invention provides.
Fig. 4 is the structural schematic diagram for the hydraulic system that third embodiment of the invention provides.
Specific implementation mode
It is of the invention to reach the technological means and effect that predetermined goal of the invention is taken further to illustrate, below in conjunction with
Attached drawing and preferred embodiment, it is as follows that the present invention is described in detail.
The purpose of the present invention is to provide a kind of hydraulic system and with the creeper undercarriage of the hydraulic system, the hydraulic pressure
System simply and reliablely improves the synchronism of left and right running motor by increasing synchronizing sequence valve between two running motors,
Simple in structure, cost is relatively low.
Fig. 2 is the structural schematic diagram for the hydraulic system that first embodiment of the invention provides.As shown in Fig. 2, the present invention provides
Hydraulic system include hydraulic pump 10, running motor and reversal valve, running motor includes left running motor 21 and right running motor
22, reversal valve includes left reversal valve 31 and right reversal valve 32, and hydraulic pump 10 is connected by left reversal valve 31 with left running motor 21,
It is connected with right running motor 22 by right reversal valve 32.In the present invention, hydraulic system further includes synchronizing sequence valve 40, works as left lateral
It walks motor 21 and when right running motor 22 is in forward or backward state, the left front inlet LF1 of left running motor 21 is (i.e. left
Inlet when 21 forward travel state of running motor can also regard the liquid outlet of 21 fallback state of left running motor as) and it is left front go out
Liquid mouth LB1 (liquid outlet of i.e. left 21 forward travel state of running motor, can also regard as left lateral gallop along on horseback 21 reach fallback state feed liquor
Mouthful) by synchronizing sequence valve 40 respectively with inlet RF1 before the right side of right running motor 22 (i.e. right 22 forward travel state of running motor when
Inlet, the liquid outlet of 22 fallback state of right running motor can also be regarded as) and the right side before liquid outlet RB1 (i.e. right running motors
Liquid outlet when 22 forward travel state can also regard the inlet of 22 fallback state of right running motor as) connection.
Compared with the prior art, the present invention increased between left running motor 21 and right running motor 22 control left lateral walk
The synchronizing sequence valve 40 of connected state between motor 21 and right running motor 22, when left running motor 21 and right running motor 22 are equal
When in forward travel state or fallback state namely the motion state of left running motor 21 and right running motor 22 always when, left lateral
It walks the left front inlet LF1 and left front liquid outlet LB1 of motor 21 and passes through the right side with right running motor 22 respectively of synchronizing sequence valve 40
Liquid outlet RB1 connections before preceding inlet RF1 and the right side.Under forward or backward state, even if left running motor 21 is galloped along on horseback with right lateral
There are the difference of flow between up to 22, due to the right side of left front the inlet LF1 and right running motor 22 of left running motor 21 at this time
Preceding inlet RF1 connections, the left front liquid outlet LB1 of left running motor 21 are connected to liquid outlet RB1 before the right side of right running motor 22,
Therefore, hydraulic oil can be flowed by synchronizing sequence valve 40 between left running motor 21 and right running motor 22, even if hydraulic pressure
There are errors for actuation member in system, can also ensure that left running motor 21 is equal with the flow in right running motor 22, simply
The synchronism of left running motor 21 and right running motor 22 is reliably improved, simple in structure, cost is relatively low.
In the present embodiment, reversal valve is hydraulic directional valve, which further includes pilot valve, and pilot valve includes left front
Pilot valve 63 (uses C1 tables before pilot valve 61 (being indicated with A1 in Fig. 2), left back pilot valve 62 (being indicated with B1 in Fig. 2), the right side in Fig. 2
Show) and the right side after pilot valve 64 (being indicated with D1 in Fig. 2).Two of left front pilot valve 61 and left back pilot valve 62 and left reversal valve 31
Pilot control hydraulic fluid port is connected, and controls the conversion of 31 working position of left reversal valve, and pilot valve 63 is changed with pilot valve 64 behind the right side with the right side before the right side
It is connected to two pilot control hydraulic fluid ports of valve 32, controls the conversion of 32 working position of right reversal valve.
In the first embodiment of the present invention, synchronizing sequence valve 40 is pilot operated directional control valve, and synchronizing sequence valve 40 includes first
Three-position valve 41 and the second three-position valve 42, the first three-position valve 41 and the second three-position valve 42 include at least four hydraulic fluid ports, the one or three
Valve 41 includes the LF2 hydraulic fluid ports and LB2 hydraulic fluid ports positioned at side, and two first transfer hydraulic fluid port M1, M2 positioned at the other side, and second
Three-position valve 42 includes positioned at the RF2 hydraulic fluid ports and RB2 hydraulic fluid ports of side and two second transfer hydraulic fluid ports M3, M4 positioned at the other side.
The LF2 hydraulic fluid ports of first three-position valve 41 are connected with the left front inlet LF1 of left running motor 21, the LB2 hydraulic fluid ports of the first three-position valve 41
It is connected with the left front liquid outlet LB1 of left running motor 21；The RF2 hydraulic fluid ports of second three-position valve 42 and the right advance of right running motor 22
Liquid mouth RF1 is connected, and the RB2 hydraulic fluid ports of the second three-position valve 42 are connected with liquid outlet RB1 before the right side of right running motor 22, the first three-position valve
41 two first transfer hydraulic fluid port M1, M2 are connected with two second transfer hydraulic fluid ports M3, M4 of the second three-position valve 42；First three-position valve
41 and second three-position valve 42 include positioned at intermediate the first working position, the second working position and third working position, when the one or three
When valve 41 and the second three-position valve 42 are in the first working position, left front inlet LF1 with it is right before inlet RF1 be connected to, it is left front go out
Liquid mouth LB1 is connected to liquid outlet RB1 before the right side；When at least one in the first three-position valve 41 and the second three-position valve 42 is in the second work
When making position or third working position, it is not connected between left running motor 21 and right running motor 22.
Further, in the present embodiment, the first three-position valve 41 and the second three-position valve 42 are hydraulic control three-position valve, such as hydraulic control
Three-position four-way valve is both provided with pilot control hydraulic fluid port, the first three-position valve at the both ends of the first three-position valve 41 and the second three-position valve 42
41 and second two pilot control hydraulic fluid ports on one of three-position valve 42 respectively with pilot valve before left front pilot valve 61 and the right side
63 are connected, the first three-position valve 41 and the second three-position valve 42 it is wherein another on two pilot control hydraulic fluid ports respectively with left back guide
Pilot valve 64 is connected after valve 62 and the right side.
As shown in Fig. 2, in the present embodiment, the pilot control hydraulic fluid port A2 phases of left front pilot valve 61 and the first three-position valve 41
Even, pilot valve 63 is connected with the pilot control hydraulic fluid port C2 in the first three-position valve 41 before the right side, left back pilot valve 62 and the second three-position valve
42 pilot control hydraulic fluid port B2 is connected, and pilot valve 64 is connected with D2 mouthfuls of the pilot control hydraulic fluid port of the second three-position valve 42 behind the right side.
By taking the connection type in Fig. 2 as an example, when left running motor 21 and right running motor 22 are in advance working condition
When, the hydraulic oil of pilot valve 63 flows into pilot control hydraulic fluid port A2 and guide on the first three-position valve 41 before left front pilot valve 61 and the right side
Control port C2,41 left and right ends pressure of the first three-position valve is equal, and the first three-position valve 41 is in the first working position, left back pilot valve
62 and the right side after hydraulic oil in pilot valve 64 do not enter pilot control hydraulic fluid port B2 and pilot control oil on the second three-position valve 42
Mouth D2, therefore the equal no pressure in 42 left and right ends of the second three-position valve, the second three-position valve 42 are also at the first working position.At this point, left front
Inlet LF1 is connected to inlet RF1 before the right side, and left front liquid outlet LB1 is connected to liquid outlet RB1 before the right side.Left running motor 21 and
It can realize that flow is equal by synchronizing sequence valve 40 between right running motor 22.Similarly, when left running motor 21 and right lateral are walked
When motor 22 is in retrogressing working condition, the equal no pressure in both ends of the first three-position valve 41, the pressure at two ends of the second three-position valve 42
Equal, left front inlet LF1 is connected to inlet RF1 before the right side, and left front liquid outlet LB1 is connected to liquid outlet RB1 before the right side.Left lateral is walked
It remains able to realize that flow is equal by synchronizing sequence valve 40 between motor 21 and right running motor 22.
When one of left running motor 21 and right running motor 22 are in forward travel state, and it is wherein another in retreating
Or stationary state state, and when one of left running motor 21 and right running motor 22 are in fallback state, and wherein
It is another in advancing or when stationary state state, i.e., the walking states between left running motor 21 and right running motor 22 are inconsistent
When, the first three-position valve 41 and the second three-position valve 42 only have one end and are under pressure, and the first three-position valve 41 and the second three-position valve 42 are
The second working position or third working position are switched to from the first working position, is not connected between left running motor 21 and right running motor 22
It is logical.It will not influence each other between left running motor 21 and right running motor 22.
In the present embodiment, by the setting of the first three-position valve 41 and the second three-position valve 42, and by the first three-position valve 41 and
Pilot control hydraulic fluid port A2, B2, C2, the D2 at 42 both ends of the second three-position valve are connected with four pilot valves respectively, are controlled by pilot valve
The switching of 40 working position of synchronizing sequence valve, when left running motor 21 and right running motor 22 in the state of forward or backward when, make
Left front inlet LF1 is connected to inlet RF1 before the right side, and left front liquid outlet LB1 is connected to liquid outlet RB1 before the right side, ensures that left lateral is walked
Flow is equal between motor 21 and right running motor 22, improves the synchronism of left and right running motor 22.When left running motor 21
And right 22 walking states of running motor it is inconsistent when, so that left running motor 21 and right running motor 22 is not connected to, therefore synchronize suitable
The setting of sequence valve 40 will not impact the work of the left running motor 21 and right running motor 22 of the state.
Fig. 3 is the structural schematic diagram of synchronizing sequence valve in the hydraulic system that second embodiment of the invention provides.Such as Fig. 3 institutes
To show, the structure of the hydraulic system that the second embodiment of the present invention provides and the hydraulic system that 3rd embodiment provides is essentially identical,
Its difference is：In a second embodiment, synchronizing sequence valve 40 includes a third three-position valve 43, is arranged on third three-position valve 43
There are LF2 the and LB2 hydraulic fluid ports positioned at the same side, and RF2 the and RB2 hydraulic fluid ports positioned at the other side, LF2 hydraulic fluid ports and left running motor 21
Left front inlet LF1 be connected, LB2 hydraulic fluid ports are connected with the left front liquid outlet LB1 of left running motor 21；RF2 hydraulic fluid ports are walked with right lateral
Inlet RF1 is connected before the right side of motor 22, and RB2 hydraulic fluid ports are connected with liquid outlet RB1 before the right side of right running motor 22.
Third three-position valve 43 includes the second working position positioned at the first intermediate working position and the first working position both sides and the
Three working positions, when third three-position valve 43 is in the first working position, left front inlet LF1 is connected to inlet RF1 before the right side, left front
Liquid outlet LB1 is connected to liquid outlet RB1 before the right side, when third three-position valve 43 is in the second working position or third working position, left lateral
It walks and is not connected between motor 21 and right running motor 22.
The both ends of third three-position valve 43 are respectively provided with there are two pilot control hydraulic fluid port, and the guide of one end of third three-position valve 43 is controlled
Liquefaction mouth is connected with pilot valve 64 behind left front pilot valve 61 and the right side respectively, the pilot control hydraulic fluid port point of the other end of third three-position valve
It is not connected with pilot valve 63 before left back pilot valve 62 and the right side.By the control to pilot valve, 43 work of third three-position valve can be controlled
Make the transformation of position.
Fig. 4 is the structural schematic diagram for the hydraulic system that third embodiment of the invention provides.The third embodiment of the present invention with
The structure of the second embodiment of the present invention is essentially identical, the difference is that, in the present embodiment, synchronizing sequence valve 40 can be with
For electric change valve, at this point, synchronizing sequence valve 40 is two solenoid valves 44, such as two-position four-way solenoid valve, two solenoid valves 44
At least provided with tetra- hydraulic fluid ports of LF2, LB2, RF2 and RB2, LF2 hydraulic fluid ports are connected with the left front inlet LF1 of left running motor 21,
LB2 hydraulic fluid ports are connected with the left front liquid outlet LB1 of left running motor 21；RF2 hydraulic fluid ports and inlet RF1 before the right side of right running motor 22
It is connected, RB2 hydraulic fluid ports are connected with liquid outlet RB1 before the right side of right running motor 22.
Two above-mentioned solenoid valves 44 include first working position and second working position, when solenoid valve is in first
When working position, left front inlet LF1 is connected to inlet RF1 before the right side, and left front liquid outlet LB1 is connected to liquid outlet RB1 before the right side, when
When solenoid valve is in the second working position, it is not connected between left running motor 21 and right running motor 22.
Further, in the present embodiment, hydraulic system can not be commutated by pilot valve to control reversal valve, liquid
Pressure system further includes left operation handle 51, right operation handle 52 and controller 53, and reversal valve may be electric change valve, control
Device 53 detects the signal of left operation handle 51 and right operation handle 52, and according to signal control reversal valve and synchronizing sequence valve 40 into
Row operation.Bounce after controller 53 detects that left operation handle 51 and right operation handle 52 send out progress signal or send out
Number when, control two solenoid valves 44 be in the first working position, make left front inlet LF1 phase of the LF2 hydraulic fluid ports with left running motor 21
Even, LB2 hydraulic fluid ports are connected with the left front liquid outlet LB1 of left running motor 21, when controller 53 detects left operation handle 51 and the right side
When the signal that operation handle 52 is sent is inconsistent, controller 53 controls two solenoid valves 44 and is in the second working position, and left lateral is galloped along on horseback
It is not connected to right running motor 22 up to 21.
In conclusion the present invention increases between left running motor 21 and right running motor 22 controls left running motor 21
The synchronizing sequence valve 40 of connected state between right running motor 22, before left running motor 21 and right running motor 22 are in
When into state or fallback state, the left front inlet LF1 and left front liquid outlet LB1 of left running motor 21 pass through synchronizing sequence valve 40
It is connected to respectively with liquid outlet RB1 before inlet RF1 before the right side of right running motor 22 and the right side.Under forward or backward state, even if
There are the difference of flow between left running motor 21 and right running motor 22, due to the left front inlet of left running motor 21 at this time
LF1 is connected to inlet RF1 before the right side of right running motor 22, left front liquid outlet LB1 and the right running motor of left running motor 21
Liquid outlet RB1 is connected to before 22 right side, and therefore, hydraulic oil can be galloped along on horseback by synchronizing sequence valve 40 in left running motor 21 and right lateral
It is flowed between up to 22, even if there are can ensure that left running motor 21 is galloped along on horseback with right lateral if error for actuation member in hydraulic system
It is equal up to the flow in 22, the synchronism of left running motor 21 and right running motor 22 is simply and reliablely improved, it is simple in structure, at
This is relatively low.
The present invention also provides a kind of creeper undercarriage, which includes what various embodiments of the present invention provided
Hydraulic system, the creeper undercarriage further include speed reducer and driving wheel, left running motor 21 and right running motor 22 respectively with
Speed reducer and driving wheel positioned at the same side are connected, and driving wheel is connected with crawler belt, and left running motor 21 and right running motor 22 pass through
Crossing speed reducer drives driving wheel rotation, driving wheel that crawler belt is driven then creeper undercarriage to be made to move.About the crawler travel machine
Other technical characteristics of structure, refer to the prior art, details are not described herein.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
For the equivalent embodiment of equivalent variations, as long as be without departing from technical solution of the present invention content, it is right according to the technical essence of the invention
Any simple modification, equivalent change and modification made by above example, in the range of still falling within technical solution of the present invention.
Claims (10)
1. a kind of hydraulic system, including hydraulic pump, running motor and reversal valve, the running motor includes left running motor and the right side
Running motor, the reversal valve include left reversal valve and right reversal valve, and the hydraulic pump passes through the left reversal valve and the left side
Running motor is connected, and the hydraulic pump is connected by the right reversal valve with the right running motor, it is characterised in that：The liquid
Pressure system further includes synchronizing sequence valve, and the synchronizing sequence valve includes at least the LF2 hydraulic fluid ports and LB2 hydraulic fluid ports positioned at side, and
RF2 hydraulic fluid ports and RB2 hydraulic fluid ports positioned at the other side, the LF2 hydraulic fluid ports are connected with the left front inlet of the left running motor, described
LB2 hydraulic fluid ports are connected with the left front liquid outlet of the left running motor, the RF2 hydraulic fluid ports and feed liquor before the right side of the right running motor
Mouth is connected, and the RB2 hydraulic fluid ports are connected with liquid outlet before the right side of the right running motor, and the synchronizing sequence valve includes the first work
Position and the second working position, when the left running motor and the right running motor are in advance or are in fallback state,
The synchronizing sequence valve is located at first working position, and the LF2 hydraulic fluid ports are connected to the RF2 hydraulic fluid ports, so that the left lateral is walked
The left front inlet of motor is connected to inlet before the right side of the right running motor, and the LB2 hydraulic fluid ports connect with the RB2 hydraulic fluid ports
It is logical, so that the left front liquid outlet of the left running motor is connected to liquid outlet before the right side of the right running motor.
2. hydraulic system according to claim 1, it is characterised in that：When the left running motor walking states with it is described
When the walking states of right running motor are inconsistent, the left running motor is not connected to the right running motor.
3. hydraulic system according to claim 1, it is characterised in that：The synchronizing sequence valve is electric change valve or hydraulic control
Reversal valve.
4. hydraulic system according to claim 1, it is characterised in that：The synchronizing sequence valve includes the first three-position valve and the
Two three-position valves, first three-position valve and second three-position valve include at least four hydraulic fluid ports, and first three-position valve includes
LF2 hydraulic fluid ports and LB2 hydraulic fluid ports positioned at side, and two first transfer hydraulic fluid port M1, M2 positioned at the other side, described two or three
Valve includes RF2 hydraulic fluid ports and RB2 hydraulic fluid ports positioned at the same side and two second transfer hydraulic fluid port M3, M4 positioned at the other side, described
The LF2 hydraulic fluid ports of first three-position valve are connected with the left front inlet of the left running motor, the LB2 hydraulic fluid ports of first three-position valve with
The left front liquid outlet of the left running motor is connected, before the right side of the RF2 hydraulic fluid ports of second three-position valve and the right running motor
Inlet is connected, and the RB2 hydraulic fluid ports of second three-position valve are connected with liquid outlet before the right side of the right running motor, and the described 1st
First transfer hydraulic fluid port M1, M2 of position valve is connected with second transfer hydraulic fluid port M3, M4 of second three-position valve respectively, and the described 1st
Position valve and second three-position valve include the first working position, the second working position and third working position, when first three-position valve
And second three-position valve is when being in the first working position, the left front inlet with it is described it is right before inlet be connected to, the left side
Preceding liquid outlet is connected to liquid outlet before the right side, when first three-position valve and at least one in second three-position valve are in
When the second working position or third working position, the left running motor is not connected to the right running motor.
5. hydraulic system according to claim 4, it is characterised in that：The hydraulic system further includes pilot valve, the elder generation
Pilot valve include left front pilot valve, left back pilot valve, it is right before pilot valve, first three-position valve and described second behind pilot valve and the right side
First working position of three-position valve is set between the second working position and third working position, in first three-position valve and described
The both ends of second three-position valve are both provided with pilot control hydraulic fluid port, one of first three-position valve and second three-position valve
On two pilot control hydraulic fluid ports respectively with the left front pilot valve and it is described it is right before pilot valve be connected, first three-position valve and
Second three-position valve it is wherein another on two pilot control hydraulic fluid ports respectively with the left back pilot valve and it is described it is right after first
Pilot valve is connected.
6. hydraulic system according to claim 1, it is characterised in that：The synchronizing sequence valve includes one the three or three
Valve is provided with LF2 hydraulic fluid ports and LB2 hydraulic fluid ports positioned at the same side, and the RF2 hydraulic fluid ports positioned at the other side on the third three-position valve
And RB2 hydraulic fluid ports, the LF2 hydraulic fluid ports are connected with the left front inlet of the left running motor, the LB2 hydraulic fluid ports are walked with the left lateral
The left front liquid outlet of motor is connected, and the RF2 hydraulic fluid ports are connected with inlet before the right side of the right running motor, the RB2 hydraulic fluid ports
It is connected with liquid outlet before the right side of the right running motor, the third three-position valve includes the first working position, the second working position and the
Three working positions, when the third three-position valve is in the first working position, the left front inlet is connected to inlet before the right side,
The left front liquid outlet is connected to liquid outlet before the right side, when the third three-position valve is in the second working position or third working position
When, the left running motor is not connected to the right running motor.
7. hydraulic system according to claim 6, it is characterised in that：The hydraulic system further includes pilot valve, the elder generation
Pilot valve include left front pilot valve, left back pilot valve, it is right before pilot valve behind pilot valve and the right side, described the first of the third three-position valve
For working position between the second working position and third working position, the both ends of the third three-position valve are respectively provided with that there are two pilot controls
Hydraulic fluid port, the pilot control hydraulic fluid port of one end of the third three-position valve respectively with the left front pilot valve and it is described it is right after pilot valve phase
Even, the pilot control hydraulic fluid port of the other end of the third three-position valve is connected with pilot valve before the left back pilot valve and the right side respectively.
8. hydraulic system according to claim 1, it is characterised in that：The synchronizing sequence valve is two solenoid valves, described
Two solenoid valves are walked at least provided with LF2 hydraulic fluid ports, LB2 hydraulic fluid ports, RF2 hydraulic fluid ports and RB2 hydraulic fluid ports, the LF2 hydraulic fluid ports with the left lateral
The left front inlet of motor is connected, and the LB2 hydraulic fluid ports are connected with the left front liquid outlet of the left running motor, the RF2 hydraulic fluid ports
It is connected with inlet before the right side of the right running motor, the RB2 hydraulic fluid ports are connected with liquid outlet before the right side of the right running motor,
Two solenoid valves include the first working position and the second working position, when two solenoid valves are in the first working position, institute
It states left front inlet to be connected to inlet before the right side, the left front liquid outlet is connected to liquid outlet before the right side, when described two
When position solenoid valve is in the second working position, the left running motor is not connected to the right running motor.
9. hydraulic system according to claim 8, it is characterised in that：The hydraulic system includes controller, left manipulator
Handle and right operation handle, the controller receive the signal of the left operation handle and the right operation handle, and according to signal
Synchronizing sequence valve is controlled, before the controller detects that the left operation handle and the right operation handle are sent out
Into or when sending out backing signal, the controller, which controls the synchronizing sequence valve, makes the left front inlet and the right advance
Liquid mouth is connected to, and the left front liquid outlet is connected to liquid outlet before the right side, when the controller detects the left operation handle
And the signal that sends out of the right operation handle it is inconsistent when, the controller, which controls the synchronizing sequence valve, makes the left lateral gallop along on horseback
It is not connected to up to the right running motor.
10. a kind of creeper undercarriage, it is characterised in that：Including the hydraulic pressure described in claim 1 to claim 9 any one
System.
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| CN201710567417.XA CN107237789B (en) | 2017-07-12 | 2017-07-12 | Hydraulic system and creeper undercarriage with the hydraulic system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710567417.XA CN107237789B (en) | 2017-07-12 | 2017-07-12 | Hydraulic system and creeper undercarriage with the hydraulic system |
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| Publication Number | Publication Date |
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| CN107237789A CN107237789A (en) | 2017-10-10 |
| CN107237789B true CN107237789B (en) | 2018-10-12 |
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|---|---|---|---|---|
| US4354420A (en) * | 1979-11-01 | 1982-10-19 | Caterpillar Tractor Co. | Fluid motor control system providing speed change by combination of displacement and flow control |
| EP1146234A2 (en) * | 2000-04-12 | 2001-10-17 | Husco International, Inc. | Hydraulic system with shadow poppet valve |
| CN202378697U (en) * | 2011-12-20 | 2012-08-15 | 徐州重型机械有限公司 | Travel hydraulic control system and self-propelled engineering machinery applying such control system |
| CN103434961A (en) * | 2013-08-21 | 2013-12-11 | 上海中联重科桩工机械有限公司 | Double winding control system and engineering machine |
| CN203770285U (en) * | 2014-04-18 | 2014-08-13 | 西安煤矿机械有限公司 | Double-pump-box hydraulic system of coal cutter |
| CN204082743U (en) * | 2014-09-26 | 2015-01-07 | 北京南车时代机车车辆机械有限公司 | Rotary drilling rig and master winch promote preferential hydraulic control system |
| CN104675778A (en) * | 2013-11-29 | 2015-06-03 | 天津萨克赛斯机械技术开发有限公司 | Synchronous adjustment system |
-
2017
- 2017-07-12 CN CN201710567417.XA patent/CN107237789B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4354420A (en) * | 1979-11-01 | 1982-10-19 | Caterpillar Tractor Co. | Fluid motor control system providing speed change by combination of displacement and flow control |
| EP1146234A2 (en) * | 2000-04-12 | 2001-10-17 | Husco International, Inc. | Hydraulic system with shadow poppet valve |
| CN202378697U (en) * | 2011-12-20 | 2012-08-15 | 徐州重型机械有限公司 | Travel hydraulic control system and self-propelled engineering machinery applying such control system |
| CN103434961A (en) * | 2013-08-21 | 2013-12-11 | 上海中联重科桩工机械有限公司 | Double winding control system and engineering machine |
| CN104675778A (en) * | 2013-11-29 | 2015-06-03 | 天津萨克赛斯机械技术开发有限公司 | Synchronous adjustment system |
| CN203770285U (en) * | 2014-04-18 | 2014-08-13 | 西安煤矿机械有限公司 | Double-pump-box hydraulic system of coal cutter |
| CN204082743U (en) * | 2014-09-26 | 2015-01-07 | 北京南车时代机车车辆机械有限公司 | Rotary drilling rig and master winch promote preferential hydraulic control system |
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| Publication number | Publication date |
|---|---|
| CN107237789A (en) | 2017-10-10 |
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