CN107237789A - Hydraulic system and the creeper undercarriage with the hydraulic system - Google Patents
Hydraulic system and the creeper undercarriage with the hydraulic system Download PDFInfo
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- CN107237789A CN107237789A CN201710567417.XA CN201710567417A CN107237789A CN 107237789 A CN107237789 A CN 107237789A CN 201710567417 A CN201710567417 A CN 201710567417A CN 107237789 A CN107237789 A CN 107237789A
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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 also includes synchronizing sequence valve, when the left running motor and the right running motor are in advancing or are in fallback state, the left front inlet of the left running motor is connected with inlet before the right side of the right running motor, the left front liquid outlet of the left running motor is connected with 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 construction, 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 of walking engineering machinery is generally crawler type walking mechanism, crawler type walking mechanism
Generally it is driven using hydraulic system.Fig. 1 show the structural representation 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 left running motor 921 and the right running motor 922 of 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 of the right running motor 922 of control；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 by right reversal valve 932 with right lateral
Motor 922 is connected.Left reversal valve 931 and right reversal valve 932 include advance working position, retreat working position and middle working position.
Left front pilot valve 941 and left back pilot valve 942 control left reversal valve 931 to be operated the transformation of position respectively, when left front pilot valve
941 when being pulled down into, and left reversal valve 931 switches to advance working position, and left running motor 921 drives crawler belt to run forward, when left back
When pilot valve 942 is pulled down into, left reversal valve 931 switches to retrogressing working position, and left running motor 921 drives crawler belt to run forward.
Similarly, pilot valve 944 controls the transformation that right reversal valve 932 is operated 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 can typically have compensation
Function so that hydraulic pump 91, by the fuel feeding that the opening degree of reversal valve 93 is proportional, commutates in the range 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 is advanced or is retreated, 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 can produce certain error in the fabrication process, and the error changes a left side
Occurs deviation 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
Cause, under identical pilot pressure, the opening degree of left and right reversal valve 931,932 is inconsistent, the hydraulic oil of reversal valve 93 is passed through during work
Flow can also produce difference.
Meanwhile, pilot valve 94 can equally produce error in manufacturing process, and the error causes the output pressure of pilot valve 94
It is inconsistent, directly the opening degree of reversal valve 93 can be caused inconsistent.
Further, operate reversal valve 93 when, it is necessary to one people of staff simultaneously manipulate two operation handles, because
This, the error of two operation handles can hardly be avoided, and the pressure that pilot valve 94 is exported 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 manufacturing process, this needs the making essence for improving parts
Degree, or the complicated control element of increase, which greatly enhances the manufacturing cost of hydraulic system；Operation to reduce staff
Error, this can greatly increase cost of human resources.Integrate, the making of walking mechanism and running cost can be greatly increased.
The content of the invention
In view of this, the crawler travel machine it is an object of the invention to provide a kind of hydraulic system and with the hydraulic system
Structure, the hydraulic system simply and reliablely improves left and right running motor by increasing synchronizing sequence valve between two running motors
Synchronism, simple in construction, 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
State 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 also includes synchronizing sequence valve, be in advancing when the left running motor and the right running motor or
When being in fallback state, the left front inlet of the left running motor is connected with inlet before the right side of the right running motor,
The left front liquid outlet of the left running motor is connected with 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 with 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
Stating the second three-position valve at least includes four hydraulic fluid ports, and first three-position valve includes the LF2 hydraulic fluid ports and LB2 hydraulic fluid ports positioned at side,
And positioned at two first transfer hydraulic fluid ports M1, M2 of opposite 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 opposite 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 the 3rd working position, when first three-position valve and second three-position valve are in first
During working position, the left front inlet is connected with the right preceding inlet, and the left front liquid outlet connects with the right preceding liquid outlet
It is logical, when at least one in first three-position valve and second three-position valve is in the second working position or three working positions,
The left running motor is not connected with the right running motor.
Further, the hydraulic system also includes pilot valve, and the pilot valve includes left front pilot valve, left back guide
First working position of pilot valve behind valve, right preceding pilot valve and the right side, first three-position valve and second three-position valve is set
Between the second working position and the 3rd working position, elder generation is provided with the two ends of first three-position valve and second three-position valve
Lead two pilot control hydraulic fluid ports on control port, 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 being provided with the 3rd three-position valve, the 3rd three-position valve and is located at
The LF2 hydraulic fluid ports and LB2 hydraulic fluid ports of the same side, and positioned at the RF2 hydraulic fluid ports and RB2 hydraulic fluid ports of opposite 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 3rd three-position valve includes the first working position, the second working position and the 3rd working position, when the 3rd three-position valve is in
During the first working position, the left front inlet is connected with the right preceding inlet, and the left front liquid outlet before the right side with going out liquid
Mouth connection, when the 3rd three-position valve is in the second working position or three working positions, the left running motor and the right lateral
Motor is walked not connect.
Further, the hydraulic system also includes pilot valve, and the pilot valve includes left front pilot valve, left back guide
Pilot valve behind valve, right preceding pilot valve and the right side, first working position of the 3rd three-position valve is located at the second working position and the 3rd
Between working position, the two ends of the 3rd three-position valve are provided with two pilot control hydraulic fluid ports, one end of the 3rd 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 3rd three-position valve
Pilot control hydraulic fluid port respectively with the left back pilot valve and it is right before pilot valve be connected..
Further, the synchronizing sequence valve is two magnetic valves, and two magnetic 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 are 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
State RB2 hydraulic fluid ports with liquid outlet before the right side of the right running motor to be connected, two magnetic valves include the first working position and second
Working position, when two magnetic valves are in the first working position, the left front inlet is connected with the right preceding inlet, institute
State left front liquid outlet to connect with the right preceding liquid outlet, when two magnetic valves are in the second working position, the left lateral is walked
Motor is not connected with the right running motor.
Further, the hydraulic system includes controller, left operation handle and right operation handle, and the controller is received
The signal of the left operation handle and the right operation handle, and synchronizing sequence valve is controlled according to signal, when the control
Device processed detects the left operation handle and the right operation handle is sent when advancing or sending backing signal, the control
Device controls the synchronizing sequence valve the left front inlet is connected with the right preceding inlet, the left front liquid outlet with it is described
Liquid outlet connection before right, differs when the controller detects the signal that the left operation handle and the right operation handle send
During cause, the controller controls the synchronizing sequence valve the left running motor is not connected with the right running motor.
Present invention also offers a kind of creeper undercarriage, the creeper undercarriage includes the hydraulic pressure system that the present invention is provided
System.
In summary, the present invention adds the left running motor of control and right lateral between left running motor and right running motor
The synchronizing sequence valve of connected state between motor is walked, when left running motor and right running motor are in forward travel state or retreat shape
During 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
Inlet RF1 and right preceding liquid outlet RB1 connections before right.Under advance or fallback state, even if left running motor is galloped along on horseback with right lateral
There is the difference of flow between reaching, due to the now left front inlet LF1 of left running motor and feed liquor before the right side of right running motor
Mouth RF1 connections, the left front liquid outlet LB1 of left running motor is connected with 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 also ensure that left running motor is equal with the flow in right running motor, simply and reliablely improve left running motor
With the synchronism of right running motor, simple in construction, cost is relatively low.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, and in order to allow the above and other objects, features and advantages of the present invention can
Become apparent, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, describe in detail as follows.
Brief description of the drawings
Fig. 1 show the structural representation of hydraulic system in the prior art.
The structural representation for the hydraulic system that Fig. 2 provides for first embodiment of the invention.
The structural representation of sequence valve in the hydraulic system that Fig. 3 provides for second embodiment of the invention.
The structural representation for the hydraulic system that Fig. 4 provides for third embodiment of the invention.
Embodiment
Further to illustrate the present invention to reach the technological means and effect that predetermined goal of the invention is taken, below in conjunction with
Accompanying drawing and preferred embodiment, it is as follows that the present invention is described in detail.
It is an object of the invention to provide a kind of hydraulic system and the creeper undercarriage with 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 construction, cost is relatively low.
The structural representation for the hydraulic system that Fig. 2 provides for first embodiment of the invention.As shown in Fig. 2 the present invention is provided
Hydraulic system include hydraulic pump 10, running motor and reversal valve, running motor include 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 by right reversal valve 32 with right running motor 22.In the present invention, hydraulic system also includes synchronizing sequence valve 40, works as left lateral
Walk motor 21 and right running motor 22 is in advancing or during fallback state, the left front inlet LF1 of a left running motor 21 (i.e. left side
Inlet during 21 forward travel state of running motor, can also regard the liquid outlet of the left fallback state of running motor 21 as) and it is left front go out
Liquid mouthful LB1 (liquid outlet of the i.e. left forward travel state of running motor 21, can also regard as left lateral gallop along on horseback 21 up to 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 the right fallback state of running motor 22 can also be regarded as) and it is right before liquid outlet RB1 (i.e. right running motors
Liquid outlet during 22 forward travel state, can also regard the inlet of the right fallback state of running motor 22 as) connection.
Compared to prior art, the present invention adds control left lateral between left running motor 21 and right running motor 22 and walked
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
During in forward travel state or fallback state, namely left running motor 21 and right running motor 22 motion state always when, left lateral
Walk the right side of the left front inlet LF1 and left front liquid outlet LB1 of motor 21 by synchronizing sequence valve 40 respectively with right running motor 22
Preceding inlet RF1 and right preceding liquid outlet RB1 connections.Under advance or fallback state, even if left running motor 21 is galloped along on horseback with right lateral
There is the difference of flow between up to 22, due to the now left front inlet LF1 of left running motor 21 and right running motor 22 right side
Preceding inlet RF1 connections, the left front liquid outlet LB1 of left running motor 21 is connected with 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
In system there is error in actuation member, 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 construction, cost is relatively low.
In the present embodiment, reversal valve is hydraulic directional valve, and the hydraulic system also includes pilot valve, and pilot valve includes left front
Pilot valve 61 (being represented in Fig. 2 with A1), left back pilot valve 62 (being represented in Fig. 2 with B1), right preceding pilot valve 63 (use C1 tables in Fig. 2
Show) and the right side after pilot valve 64 (being represented in Fig. 2 with D1).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 the left working position of reversal valve 31, and right preceding pilot valve 63 is changed with pilot valve 64 behind the right side with the right side
It is connected to two pilot control hydraulic fluid ports of valve 32, controls the conversion of the right working position of reversal valve 32.
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
The three-position valve 42 of three-position valve 41 and second, the first three-position valve 41 and the second three-position valve 42 at least include 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 positioned at two first transfer hydraulic fluid port M1, M2 of opposite side, second
Three-position valve 42 includes the RF2 hydraulic fluid ports and RB2 hydraulic fluid ports and two second transfer hydraulic fluid ports M3, M4 positioned at opposite side positioned at 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 right advance of the RF2 hydraulic fluid ports of second three-position valve 42 and right running motor 22
Liquid mouthful 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 middle the first working position and the first working position, the second working position and the 3rd work
Position, when the first three-position 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 is connected, and left front liquid outlet LB1 is connected with right preceding liquid outlet RB1；When in the first three-position valve 41 and the second three-position valve 42 at least
One be in the second working position or three working positions when, do 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, pilot control hydraulic fluid port, the first three-position valve are provided with the two 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 left front pilot valve 61 and it is right before pilot valve
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, right preceding pilot valve 63 is connected with the pilot control hydraulic fluid port C2 in the first three-position valve 41, the left back three-position valve of pilot valve 62 and second
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 connected mode in Fig. 2 as an example, when left running motor 21 and right running motor 22 are in advance working condition
When, left front pilot valve 61 and it is right before pilot valve 63 hydraulic oil the pilot control hydraulic fluid port A2 and guide that flow on the first three-position valve 41
Control port C2, the left and right ends pressure of the first three-position valve 41 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 the pilot control hydraulic fluid port B2 and pilot control oil that do not enter on the second three-position valve 42
Mouth D2, therefore the equal no pressure in the left and right ends of the second three-position valve 42, the second three-position valve 42 are also at the first working position.Now, it is left front
Inlet LF1 is connected with right preceding inlet RF1, and left front liquid outlet LB1 is connected with right preceding liquid outlet RB1.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 retreating working condition, the equal no pressure in two 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 with right preceding inlet RF1, and left front liquid outlet LB1 is connected with right preceding liquid outlet RB1.Left lateral is walked
Remain 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 be in forward travel state, and wherein it is another in retreat
Or inactive 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 during inactive 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 equal
The second working position or the 3rd 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 be influenced 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 the two ends of the second three-position valve 42 are connected with four pilot valves respectively, pass through pilot valve control
The switching of the working position of synchronizing sequence valve 40, when left running motor 21 and right running motor 22 are in advance or fallback state, makes
Left front inlet LF1 is connected with right preceding inlet RF1, and left front liquid outlet LB1 is connected with right preceding liquid outlet RB1, it is ensured 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 walking states of running motor 22 it is inconsistent when, left running motor 21 and right running motor 22 is not connected, therefore synchronous suitable
The setting of sequence valve 40 will not also be impacted to the work of the left running motor 21 and right running motor 22 of the state.
The structural representation of synchronizing sequence valve in the hydraulic system that Fig. 3 provides for second embodiment of the invention.Such as Fig. 3 institutes
Show, the structure for the hydraulic system that the hydraulic system that the second embodiment of the present invention is provided is provided with 3rd embodiment is essentially identical,
Its difference is：In a second embodiment, synchronizing sequence valve 40 includes setting on the 3rd three-position valve 43, the 3rd three-position valve 43
There are LF2 the and LB2 hydraulic fluid ports positioned at the same side, and positioned at RF2 the and RB2 hydraulic fluid ports of opposite 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.
3rd three-position valve 43 includes the second working position positioned at the first middle working position and the first working position both sides and the
Three working positions, when the 3rd three-position valve 43 is in the first working position, left front inlet LF1 is connected with right preceding inlet RF1, left front
Liquid outlet LB1 is connected with right preceding liquid outlet RB1, when the 3rd three-position valve 43 is in the second working position or three working positions, left lateral
Walk and do not connected between motor 21 and right running motor 22.
The two ends of 3rd three-position valve 43 are provided with two pilot control hydraulic fluid ports, guide's control of one end of the 3rd three-position valve 43
Liquefaction mouthful 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 the 3rd three-position valve
It is not connected with left back pilot valve 62 and right preceding pilot valve 63.By the control to pilot valve, the work of the 3rd three-position valve 43 can be controlled
Make the transformation of position.
The structural representation for the hydraulic system that Fig. 4 provides for third embodiment of the invention.The third embodiment of the present invention with
The structure of the second embodiment of the present invention is essentially identical, and its difference is, in the present embodiment, and synchronizing sequence valve 40 can be with
For electric change valve, now, synchronizing sequence valve 40 is two magnetic valves 44, such as two-position four-way solenoid valve, two magnetic 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 magnetic valves 44 include first working position and second working position, when magnetic valve is in first
During working position, left front inlet LF1 is connected with right preceding inlet RF1, and left front liquid outlet LB1 is connected with right preceding liquid outlet RB1, when
When magnetic valve is in the second working position, do not connected between left running motor 21 and right running motor 22.
Further, in the present embodiment, hydraulic system can not control reversal valve to be commutated by pilot valve, liquid
Pressure system also includes left operation handle 51, right operation handle 52 and controller 53, and reversal valve can also be electric change valve, control
Device 53 detects the signal of left operation handle 51 and right operation handle 52, and controls reversal valve and synchronizing sequence valve 40 to enter according to signal
Row operation.Bounce after controller 53 detects left operation handle 51 and right operation handle 52 sends progress signal or sent
Number when, two magnetic valves 44 of control are in the first working position, make the left front inlet LF1 phases of LF2 hydraulic fluid ports and 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 magnetic valves 44 to be in the second working position, and left lateral is galloped along on horseback
Do not connected with right running motor 22 up to 21.
In summary, the present invention adds the left running motor 21 of control between left running motor 21 and right running motor 22
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 entering 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
Connected respectively with inlet RF1 before the right side of right running motor 22 and right preceding liquid outlet RB1.Under advance or fallback state, even if
There is the difference of flow between left running motor 21 and right running motor 22, due to the left front inlet of now left running motor 21
LF1 is connected with 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 connections before 22 right side, therefore, hydraulic oil can be galloped along on horseback by synchronizing sequence valve 40 in left running motor 21 and right lateral
Flowed between up to 22, even if actuation member has error in hydraulic system, also ensure that left running motor 21 is galloped along on horseback with right lateral
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 construction, into
This is relatively low.
Present invention also offers a kind of creeper undercarriage, the crawler travel structure includes what various embodiments of the present invention were provided
Hydraulic system, the creeper undercarriage also include reductor and driving wheel, left running motor 21 and right running motor 22 respectively with
Reductor 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 are passed through
Crossing reductor drives driving wheel to rotate, and driving wheel drives crawler belt then to move creeper undercarriage.On the crawler travel machine
Other technical characteristics of structure, refer to prior art, will not be repeated here.
The above described is only a preferred embodiment of the present invention, any formal limitation not is made to the present invention, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any to be familiar with this professional technology people
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 being the technical spirit pair according to the present invention without departing from technical solution of the present invention content
Any simple modification, equivalent variations and modification that above example is made, 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 include left running motor and the right side
Running motor, the reversal valve includes 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 also includes synchronizing sequence valve, when the left running motor and the right running motor are in advancing or are in retreating
During state, the left front inlet of the left running motor is connected with inlet before the right side of the right running motor, and the left lateral is walked
The left front liquid outlet of motor is connected with 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 with 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 at least include four hydraulic fluid ports, and first three-position valve includes
LF2 hydraulic fluid ports and LB2 hydraulic fluid ports positioned at side, and positioned at two first transfer hydraulic fluid port M1, M2 of opposite side, described two or three
Valve includes the 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 opposite 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 the 3rd 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 connect, the left side
Preceding liquid outlet is connected with the right preceding liquid outlet, when first three-position valve is in at least one in second three-position valve
When the second working position or three working positions, the left running motor is not connected with the right running motor.
5. hydraulic system according to claim 4, it is characterised in that：The hydraulic system also includes pilot valve, the elder generation
Pilot valve includes pilot valve, first three-position valve and described second behind left front pilot valve, left back pilot valve, right preceding pilot valve and the right side
First working position of three-position valve is arranged between the second working position and the 3rd working position, in first three-position valve and described
The two ends of second three-position valve are 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
The LF2 hydraulic fluid ports and LB2 hydraulic fluid ports positioned at the same side are provided with valve, the 3rd three-position valve, and positioned at the RF2 hydraulic fluid ports of opposite side
And RB2 hydraulic fluid ports, the LF2 hydraulic fluid ports are connected with the left front inlet of the left running motor, and 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
Be connected with liquid outlet before the right side of the right running motor, the 3rd three-position valve includes the first working position, the second working position and the
Three working positions, when the 3rd three-position valve is in the first working position, the left front inlet is connected with the right preceding inlet,
The left front liquid outlet is connected with the right preceding liquid outlet, when the 3rd three-position valve is in the second working position or the 3rd working position
When, the left running motor is not connected with the right running motor.
7. hydraulic system according to claim 6, it is characterised in that：The hydraulic system also includes pilot valve, the elder generation
Pilot valve includes pilot valve, described the first of the 3rd three-position valve behind left front pilot valve, left back pilot valve, right preceding pilot valve and the right side
Working position is located between the second working position and the 3rd working position, and the two ends of the 3rd three-position valve are provided with two pilot controls
Hydraulic fluid port, the pilot control hydraulic fluid port of one end of the 3rd 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 3rd three-position valve is connected with the left back pilot valve and right preceding pilot valve respectively.
8. hydraulic system according to claim 1, it is characterised in that：The synchronizing sequence valve is two magnetic valves, described
Two magnetic 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 magnetic valves include the first working position and the second working position, when two magnetic valves are in the first working position, institute
State left front inlet to connect with the right preceding inlet, the left front liquid outlet is connected with the right preceding liquid outlet, when described two
When position magnetic valve is in the second working position, the left running motor is not connected with 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 the left operation handle and the right operation handle is sent
When entering or sending backing signal, the controller controls the synchronizing sequence valve to make the left front inlet and the right advance
Liquid mouthful connection, the left front liquid outlet is connected with the right preceding liquid outlet, when the controller detects the left operation handle
And the signal that sends of the right operation handle it is inconsistent when, the controller controls the synchronizing sequence valve left lateral is galloped along on horseback
Do not connected 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 true CN107237789A (en) | 2017-10-10 |
| CN107237789B 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 |
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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 |
|---|---|
| CN107237789B (en) | 2018-10-12 |
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