CN105805074A - Three-pump confluence multi-way valve block and hydraulic excavator - Google Patents
Three-pump confluence multi-way valve block and hydraulic excavator Download PDFInfo
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- CN105805074A CN105805074A CN201610375318.7A CN201610375318A CN105805074A CN 105805074 A CN105805074 A CN 105805074A CN 201610375318 A CN201610375318 A CN 201610375318A CN 105805074 A CN105805074 A CN 105805074A
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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
- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
Abstract
The invention discloses a three-pump confluence multi-way valve block and a hydraulic excavator. The three-pump confluence multi-way valve block comprises an intermediate control joint, a left executing joint and a right executing joint, wherein the left executing joint comprises a left walking control valve, a backup control valve, a bucket control valve, a second control valve of a bucket rod, and a first control valve of a movable arm, which sequentially communicate; the right executing joint comprises a right walking control valve, a rotation control valve, a second control valve of the movable arm, and a first control valve of the bucket rod, which sequentially communicate; the intermediate control joint comprises a linear walking control valve, a first confluence valve and a second confluence valve, two main oil inlets which are separately connected with a main oil pump are formed, auxiliary oil inlets are separately formed in the left executing joint and the right executing joint, and the two auxiliary oil inlets are jointly connected with an auxiliary oil pump. According to the technical scheme adopted by the invention, when flow provided by the two main oil inlets is not sufficient to maintain coordinating motion between executing mechanisms, the auxiliary pump can be opened, oil is supplied to the movable arm through the auxiliary oil inlets, and hydraulic oil provided by the main oil pump can sufficiently coordinate the motion of the remaining executing mechanisms.
Description
Technical field
The present invention relates to excavator field, particularly relate to banked direction control valves group and the hydraulic crawler excavator at a kind of three pump interflow.
Background technology
Hydraulic crawler excavator, it it is a kind of engineering machinery being widely used in earthwork construction, as the main control valve group of its key control unit, being that the hydraulic multichannel of highly-integrated functions controls valve, the structure of hydraulic multitandem valve and mode of operation thereof determine control mode and the transaction capabilities of excavator hydraulic system.The large excavator hydraulic circuit of main flow mainly has inverted flux control hydraulic system, positive flow to control hydraulic system and load-sensitive hydraulic system three types in the market.Through market validation for many years, the hydraulic control system of three types has developed comparatively ripe.But, the hydraulic control system of three types mutually can not be compatible so that the range of application of same type banked direction control valves is extremely limited, and has had a strong impact on popularization and the application of banked direction control valves.Additionally, large-scale digging machine is many with 40T level in the market, 70T level etc. carries out classification, and the banked direction control valves matched with it also form multiple style, not only adds R&D costs and manufacturing cost, is less useful for mass production.Generally individually employing double-pump confluence system in large excavator at present, when so causing composite move, each actuator action is partially slow, work efficiency is relatively low, especially the centrally located dipper connection controlling connection left and right edges position and swing arm connection especially affect bigger, and the range of application of Dual-pump flow-converging banked direction control valves group is by the impact of its flow, its range of application is also affected by great restriction.
Consult the Chinese patent " three pump fen-confluence fluid-control multi-way valves " that the patent No. is CN200720015804.4, disclose a kind of three pump fen-confluence fluid-control multi-way valves for mini-excavator hydraulic system；Including oil inlet and oil return valve block, walking valve block, swing arm valve block, scraper bowl valve block, intermediate oil inlet valve block, soil-shifting valve block, dipper valve block, interflow valve block, auxiliary valve block, revolution valve block, walking valve block, oil inlet and oil return valve block, it is characterized in that, interflow valve block adopts unidirectional confluent structure to include valve body, valve seat, spring, steel ball connect and compose；The shunt reversing valve bar of auxiliary valve block is provided with splitter box；The valve body of intermediate oil inlet valve block communicates with oil circuit plug-in mounting overflow valve.The interflow valve block of this patent adopts unique unidirectional confluent structure, dipper valve block has double pump valve rod interflow function, but it still fails to solve when the underfed that main oil-in provides is to maintain the coordination between each actuator, the problem that each actuator runs slowly, supplies shortage of oil, it is difficult to ensure each actuator coordination of composite move.
Summary of the invention
For the above-mentioned problems in the prior art, banked direction control valves group and the hydraulic multitandem valve at a kind of three pump interflow are now provided, aim to solve the problem that when the underfed that main oil-in provides is to maintain the coordination between each actuator, the problem that each actuator runs slowly, supplies shortage of oil, to ensure each actuator coordination of composite move, and improve work efficiency.
Concrete technical scheme is as follows:
A kind of banked direction control valves group at three pump interflow, suitable in hydraulic crawler excavator, connection is controlled including middle, the left connection that performs being distributed in the control connection left and right sides, centre performs connection with right, the middle connection that controls performs connection with left respectively, the right connection that performs is connected, in order to control the flow direction of hydraulic oil in banked direction control valves group, and away from the described middle direction controlling connection, the left connection that performs includes being sequentially connected logical left travel control valves, standby control valve, bucket, dipper second controls valve, and swing arm first controls valve, the right connection that performs includes being sequentially connected logical right travel control valve, rotary control valve, swing arm second controls valve, and dipper first controls valve；
The middle connection that controls includes straight line moving control valve, the first converging valve and the second converging valve, control in centre connection is provided with and control the first main oil-in and the second main oil-in that valve is connected respectively with straight line moving, and two main oil-ins, connecting a main oil pump respectively, two converging valves, being connected and controlling valve with straight line moving respectively connects.
And, left travel control valves is connected with the first oil-in and the first converging valve, rotary control valve is connected with the second converging valve and the second oil-in, it is provided with on left execution connection and controls the auxiliary oil-in that valve is connected with swing arm first, it is provided with on right execution connection and controls another auxiliary oil-in that valve is connected with dipper first, and two auxiliary oil-ins connect an auxiliary oil pump jointly.
In the banked direction control valves group at three pump interflow provided by the invention, also having the feature that, two auxiliary oil-ins are respectively arranged on the left swing arm connection performing connection and the right dipper connection performing connection；
Wherein, swing arm connection is positioned at the left upper one end controlling connection away from centre of connection that performs, and swing arm join in there is swing arm first control valve；
Dipper connection is positioned at the right upper one end controlling connection away from centre of connection that performs, and dipper join in there is dipper first control valve.
In the banked direction control valves group at three pump interflow provided by the invention, also having the feature that, the middle connection that controls also includes:
First throttle valve and the first check valve, be all connected with the first converging valve；
Main overflow valve, is connected with first throttle valve, in order to control the maximum pressure of banked direction control valves group；
Wherein, the hydraulic oil flowing through the first check valve is entered the control chamber of the first converging valve by first throttle valve, in order to control unlatching and the closedown of the first converging valve；And controlled to flow through the maximum pressure of the hydraulic oil of the first check valve by main overflow valve, and then control the maximum pressure of hydraulic valve bank.
In the banked direction control valves group at three pump interflow provided by the invention, also having the feature that, the middle connection that controls also includes:
Second throttle and the second check valve, be all connected with the second converging valve, and the hydraulic oil flowing through the second check valve is entered the control chamber of the second converging valve by second throttle, in order to control unlatching and the closedown of the second converging valve；And controlled to flow through the maximum pressure of the hydraulic oil of the second check valve by main overflow valve, and then control the maximum pressure of hydraulic valve bank.
In the banked direction control valves group at three pump interflow provided by the invention, also have the feature that, the one end controlling to join away from centre on swing arm joins offers an oil return opening P, and on dipper joins, the one end away from centre control connection offers another oil return opening P, and two oil return openings P, P are all connected with oil sump tank.
In the banked direction control valves group at three pump interflow provided by the invention, also having the feature that, the auxiliary oil-in being positioned on swing arm connection is connected with the control chamber within swing arm connection；The auxiliary oil-in being positioned on dipper connection is connected with the control chamber within dipper connection.
In the banked direction control valves group at three pump interflow provided by the invention, also have the feature that, the middle connection that controls also includes the first bypass valve and the second bypass valve, and wherein, the first bypass valve is connected each through oil circuit or petroleum pipeline with the first converging valve, left connection and the oil sump tank of performing；
Second bypass valve is connected each through oil circuit or petroleum pipeline with the second converging valve, right connection and the oil sump tank of performing.
In the banked direction control valves group that three pumps provided by the invention collaborate, also having the feature that, neutral control valve connection also includes the first control valve and second and controls valve, and the first control valve and the first converging valve are connected, and the second control valve and the second converging valve are connected.
In the banked direction control valves group at three pump interflow provided by the invention, also having the feature that, pressure 373bar when the normal pressure of main overflow valve is 343bar, boosting, the latus rectum of the spool that straight line moving controls valve is 40mm.
Present invention also offers a kind of hydraulic crawler excavator, there is the banked direction control valves group at three above-mentioned pump interflow.
Having the beneficial effects that of technique scheme:
When the banked direction control valves group at (1) three pump interflow is specifically applied, can when the underfed that two main oil-ins provide be to maintain the coordination between each actuator, can pass through to open donkey pump via auxiliary oil-in to swing arm fuel feeding, the hydraulic oil that main oil pump provides is made can fully to coordinate the action of all the other each actuators, thus being effectively ensured boom priority function, make each actuator coordination of composite move；
(2) two auxiliary oil-ins are respectively arranged on swing arm connection and dipper connection, and it is joined directly together logical with its internal control chamber, after making unlatching donkey pump, digging force can be effectively increased, improve digging efficiency and the application of digging machine can be extended by improving digging force, energy-conservation purpose can be reached by improving digging efficiency.
Accompanying drawing explanation
Fig. 1 is the working state schematic representation one of the embodiment of the banked direction control valves group at a kind of three pump interflow of the present invention；
Fig. 2 is the middle working state schematic representation one controlling connection of the embodiment of the banked direction control valves group at a kind of three pump interflow of the present invention；
Fig. 3 is the working state schematic representation two of the embodiment of the banked direction control valves group at a kind of three pump interflow of the present invention；
Fig. 4 is the middle working state schematic representation two controlling connection of the embodiment of the banked direction control valves group at a kind of three pump interflow of the present invention；
Fig. 5 is the cross-section structure view of the swing arm connection of the embodiment of the banked direction control valves group at a kind of three pump interflow of the present invention；
Fig. 6 is the cross section view of L-L line of vision in Fig. 5.
In accompanying drawing: 0, first controls valve；1, the first bypass valve；2, the first converging valve；3, the second converging valve；4, the second bypass valve；5, second controls valve；6, first throttle valve；7, the first check valve；8, main overflow valve；9, the second check valve；10, second throttle；V1, swing arm first controls valve；V2, dipper second controls valve；V3, bucket；V4, standby control valve；V5, left travel control valves；V6, straight line moving control valve；V7, right travel control valve；V8, rotary control valve；V9, swing arm second controls valve；V10, dipper first controls valve；PL, the first main oil-in；PR, the second main oil-in；PF, auxiliary oil-in；Swing arm connection 11.
Detailed description of the invention
For the technological means making the present invention realize, creation characteristic, reaching purpose and effect and be easy to understand, following example are specifically addressed in conjunction with the banked direction control valves group at 1 to 6 pair, accompanying drawing, three pumps interflow provided by the invention.
nullFig. 1 is the working state schematic representation one of the embodiment of the banked direction control valves group at a kind of three pump interflow，Fig. 2 is the middle working state schematic representation one controlling connection of the embodiment of the banked direction control valves group at a kind of three pump interflow，Fig. 3 is the working state schematic representation two of the embodiment of the banked direction control valves group at a kind of three pump interflow，Fig. 4 is the middle working state schematic representation two controlling connection of the embodiment of the banked direction control valves group at a kind of three pump interflow，Shown in as shown in Figure 1 to Figure 4，The banked direction control valves group at three pump interflow provided by the invention is applicable to large hydraulic excavator，Connection is controlled including middle、The left connection that performs being distributed in the control connection left and right sides, centre performs connection with right，And in the upper left execution coupling in direction away from described middle control connection to control the motion of apparatus and other part thereof on the left of excavator，Right execution coupling is to control the motion of apparatus and other part thereof on the right side of described excavator，Namely the left connection that performs controls the running status of excavator each side actuator respectively with the right connection that performs，The middle connection that controls performs connection with left respectively、The right connection that performs is connected，In order to control the trend of hydraulic oil in banked direction control valves group.
Concrete, away from the described middle direction controlling connection, left performing that connection includes being sequentially connected logical left travel control valves V5, standby control valve V4, bucket V3, dipper second controls valve V2 and swing arm first controls valve V1, right execution connection includes being sequentially connected logical right travel control valve V7, rotary control valve V8, swing arm second controls valve V9 and dipper first controls valve V10.The middle connection that controls includes a straight line travel control valve V6, first converging valve 2, and second converging valve 3, control in centre connection is provided with and control valve V6 the first main oil inlet P L being connected and the second main oil inlet P R respectively with straight line moving, and two main oil inlet P L and PR connect a main oil pump respectively, in order to control valve V6 and middle control connection oil inside offering to straight line moving, and controlled the spool of valve V6 phase position decision oil circuit break-make residing in valve body and hydraulic oil in the flow direction within centre control connection by straight line moving, two converging valves are connected and control valve V6 with straight line moving respectively and are connected.
And, left travel control valves V5 and the first oil inlet P L and the first converging valve 2 are connected, rotary control valve V8 is connected with the second converging valve 3 and the second oil inlet P R, it is provided with on left execution connection and controls the valve V1 auxiliary oil inlet P F being connected with swing arm first, it is provided with on right execution connection and controls valve V10 another auxiliary oil inlet P F being connected with dipper first, and two auxiliary oil inlet P F connect an auxiliary oil pump jointly.
In technique scheme, when swing arm actuator and other actuator composite move, the underfed that two main oil inlet P L and PR provide is to maintain the coordination between each actuator, now, in order to make boom priority function be guaranteed, can pass through to open donkey pump via auxiliary oil inlet P F to swing arm fuel feeding, under the premise ensureing boom priority function, the hydraulic oil that main pump provides is made can fully to coordinate the action of all the other each actuators, it is thus possible to be effectively ensured boom priority function, make each actuator coordination of composite move.
In a preferred embodiment, specifically as shown in figs. 2 and 4, the middle connection that controls also includes: first throttle valve 6 and the first check valve 7, is all connected with the first converging valve 2；Main overflow valve 8, is connected with first throttle valve 6, in order to control the maximum pressure of banked direction control valves group；Wherein, the hydraulic oil after the first check valve 7 one-way flow is entered the control chamber of the first converging valve 2 by first throttle valve 6, in order to control the phase position residing for the spool of the first converging valve 2, namely controls the keying break-make of the first converging valve 2；And controlled to flow through the maximum pressure of the hydraulic oil of the first check valve 7 by main overflow valve 8, and then control the maximum pressure of hydraulic valve bank.
As in further preferred embodiment, the middle connection that controls also includes: second throttle 10 and the second check valve 9, all it is connected with the second converging valve 3, the hydraulic oil flowing through the second check valve 9 is entered the control chamber of the second converging valve 3 by second throttle 10, in order to control the phase position at the spool of the second converging valve 3, namely control the break-make of the second converging valve 3；And controlled to flow through the maximum pressure of the hydraulic oil of the second check valve 9 by main overflow valve 8, and then control the maximum pressure of hydraulic valve bank.Further, pressure 373bar when the normal pressure of main overflow valve 8 is 343bar, boosting, it is common to the hydraulic crawler excavator of 40T～120T level.The latus rectum of the spool that straight line moving controls valve V6 is 40mm.Wherein, concrete numerical value can adjust accordingly according to practical application, should not be limited to this.
In a preferred embodiment, specifically as shown in Figures 1 and 2, two auxiliary oil inlet P F are respectively arranged on the left swing arm connection performing connection and the right dipper connection performing connection, wherein, swing arm connection is positioned at the left upper one end controlling connection away from centre of connection that performs, and swing arm join in there is swing arm first control valve V1；Dipper connection is positioned at the right upper one end controlling connection away from centre of connection that performs, and dipper join in there is dipper first control valve V10.Further, the one end controlling to join away from centre on swing arm joins offers an oil return opening P4, and on dipper joins, the one end away from centre control connection offers another oil return opening P3, and two oil return openings are all connected with oil sump tank.
As further preferred embodiment, specifically in conjunction with Fig. 5 and Fig. 6, wherein Fig. 5 is the cross-section structure view of the swing arm connection of the embodiment of the banked direction control valves group at a kind of three pump interflow of the present invention, Fig. 6 is the cross section view of L-L line of vision in Fig. 5, as shown in FIG., the auxiliary oil inlet P F being positioned on swing arm connection joins internal control chamber with swing arm and is connected；Corresponding, the auxiliary oil inlet P F being positioned on dipper connection is connected with the control chamber within dipper connection.
Concrete, when scraper bowl excavates, open donkey pump PF, hydraulic oil is made to pass through in the auxiliary oil inlet P F entrance dipper connection that dipper first controls on valve V10, and hydraulic oil controls the auxiliary oil inlet P F on valve V1 by swing arm first and enters in swing arm connection, digging force can be effectively increased, improve digging efficiency and the application of digging machine can be extended by improving digging force, energy-conservation purpose can be reached by improving digging efficiency.
As further embodiment, the middle connection that controls also includes the first bypass valve 1 and the second bypass valve 4, and wherein, the first bypass valve 1 is connected each through oil circuit or petroleum pipeline with the first converging valve 2, left connection and the oil sump tank of performing；Second bypass valve 4 is connected each through oil circuit or petroleum pipeline with the second converging valve 3, right connection and the oil sump tank of performing.
As further embodiment, neutral control valve connection also includes the first control valve 0 and second and controls valve 5, and the first control valve 0 is connected with the first converging valve 2, and second controls valve 5 is connected with the second converging valve 3.
It is worthy of note, the multiple turnover indicated in figure and corresponding and each valve of pilot control respectively the duty of actuator port, such as, shown in Fig. 2, it is illustrated that first control valve 0 there are two guide oil inlet and outlet Dr5 and Pr10, and first controls valve 0 and has two phase places, one be conducted one phase disconnect, wherein the change of phase place is by two oil inlet and outlet Dr5 and Pr10 pilot control, thus adjusting the keying of the first control valve 0, and then other valve bodies internal carries out the change of the oil circuit flow direction.Similar, second controls valve 5 has guide oil inlet and outlet Dr6 and Pr3, first bypass valve 1 has guide oil inlet and outlet Pr1, second bypass valve 4 has guide oil inlet and outlet Pr2, main overflow valve 8 has guide oil inlet and outlet Pr9, and as shown in FIG., also there are multiple guide's oil inlet and outlets in addition, no longer illustrate one by one.
Hereinafter, illustrate with a kind of specific embodiment, it should be pointed out that structure described in implementation below, technique, selection are only in order to illustrate the feasibility of embodiment, and the intention of unrestricted scope.
Known in conjunction with Fig. 1-Fig. 4, the flow direction of the hydraulic oil by two main oil inlet P L and PR inflows is controlled by the middle connection that controls mainly through straight line moving control valve V6 inner spool place phase position, and simultaneously by two bypass valves, two converging valves, two control valves, a main overflow valve 8 and two choke valves and check valve control in the middle of control in connection hydraulic oil flow to and break-make, thus performing alliance oil to the left and right being positioned at both sides according to demand.The swing arm also performing connection two ends, left and right in the present invention in left and right joins and is respectively provided with on dipper connection an auxiliary oil inlet P F, not enough in order to solve fuel supply flow rate under compound action, it is difficult to realize the problem that actuating mechanism is preferential.
Concrete, when swing arm actuator and other actuator composite move, the underfed of two main oil inlet P L, PR offers is to maintain the coordination between each actuator, for making boom priority function be guaranteed, by opening donkey pump to swing arm fuel feeding, under the premise ensureing boom priority function, the hydraulic oil that main pump provides is made can fully to coordinate the action of all the other each actuators.
In addition, the banked direction control valves group of the present invention adopts slice structure, for the load sensing multi-way valve group suitable in large hydraulic excavator, and the difference that can be applicable to digging machine controls system: positive flow+load sensitive system, minus flow+load sensitive system and Ioad-sensing control hydraulic system, the application of load sensing multi-way valve enumerates three kinds of dissimilar hydraulic control systems.According to different Control Cooling, every advantage of the different control system of tradition can be absorbed, to improve the application in different hydraulic control systems of the load sensing multi-way valve group.Joined the functional modules such as valve of walking, converging valve and blocking mechanism by centre main oil inlet P L, PR oil circuit are controlled, it is achieved its both sides are respectively performed the only fuel feeding of receipts or other documents in duplicate, the interflow function such as fuel feeding and off-load by main oil inlet P L, PR oil circuit.
Present invention also offers a kind of hydraulic crawler excavator, there is the banked direction control valves group at three above-mentioned pump interflow.Adopt three pump control systems, according to system necessary flow, not only meet double pump and control systematic difference；Meanwhile, the application of three pump control systems is met；Extend the range of application on hydraulic crawler excavator.Adopt swing arm actuator or dipper actuator DFF Direct Fuel Feed, reduce the pressure loss, improve the utilization rate of energy.
In the above-described techniques, when the banked direction control valves group at three pump interflow is specifically applied, can when the underfed that two main oil-ins provide be to maintain the coordination between each actuator, can pass through to open donkey pump via auxiliary oil inlet P F to swing arm fuel feeding, the hydraulic oil that main oil pump provides is made can fully to coordinate the action of all the other each actuators, thus being effectively ensured boom priority function, make each actuator coordination of composite move；Two auxiliary oil inlet P F are respectively arranged on swing arm connection and dipper connection, and it is joined directly together logical with its internal control chamber, after making unlatching donkey pump, digging force can be effectively increased, improve digging efficiency and the application of digging machine can be extended by improving digging force, energy-conservation purpose can be reached by improving digging efficiency.
The foregoing is only presently preferred embodiments of the present invention, be merely illustrative for the purpose of the present invention, and nonrestrictive.Those skilled in the art is understood, and it can be carried out many changes in the spirit and scope that the claims in the present invention limit, amendment, even equivalence, but falls within protection scope of the present invention.
Claims (10)
1. the banked direction control valves group at a pump interflow, suitable in hydraulic crawler excavator, including middle control connection, be divided into described in the middle of control the connection left and right sides left and perform connection and right perform connection, described in the middle of control connection respectively with described left performs connection, right execution join be connected, in order to control the flow direction of hydraulic oil in described banked direction control valves group；
And away from the described middle direction controlling connection, described left perform connection comprise be sequentially connected logical left travel control valves (V5), standby control valve (V4), bucket (V3), dipper second controls valve (V2) and swing arm first controls valve (V1), away from the described middle direction controlling connection, described right perform connection comprise be sequentially connected logical right travel control valve (V7), rotary control valve (V8), swing arm second controls valve (V9) and dipper first controls valve (V10), it is characterized in that
Control connection in the middle of described and include straight line moving control valve (V6), the first converging valve (2) and the second converging valve (3), in the middle of described, control connection is provided with the first main oil-in (PL) being connected respectively and the second main oil-in (PR) with described straight line moving control valve (V6), and two main oil-ins (PL, PR) connect a main oil pump respectively, two described converging valves (2,3) are connected and control valve (V6) with described straight line moving respectively and connect；
And, described left travel control valves (V5) is connected with described first oil-in (PL) and described first converging valve (2), described rotary control valve (V8) is connected with described second converging valve (3) and described second oil-in (PR), it is provided with on described left execution connection and controls auxiliary oil-in (PF) that valve (V1) is connected with described swing arm first, it is provided with on described right execution connection and controls another described auxiliary oil-in (PF) that valve (V10) is connected with described dipper first, and two described auxiliary oil-ins (PF) connect an auxiliary oil pump jointly.
2. the banked direction control valves group at three pump interflow as claimed in claim 1, it is characterised in that two described auxiliary oil-ins (PF) are respectively arranged on the described left swing arm connection performing connection and the described right dipper connection performing connection；
Wherein, described swing arm connection is positioned at that described left to perform connection upper away from the one end controlling connection in the middle of described, and described swing arm join in there is described swing arm first control valve (V1)；
Described dipper connection is positioned at that described right to perform connection upper away from the one end controlling connection in the middle of described, and described dipper join in there is described dipper first control valve (V10).
3. the banked direction control valves group at three pump interflow as claimed in claim 2, it is characterised in that control connection in the middle of described and also include:
First throttle valve (6) and the first check valve (7), be all connected with described first converging valve (2)；
Main overflow valve (8), is connected with described first throttle valve (6), in order to control the maximum pressure of described banked direction control valves group；
Wherein, the hydraulic oil flowing through described first check valve (7) is entered the control chamber of described first converging valve (2) by described first throttle valve (6), in order to control unlatching and the closedown of described first converging valve (2)；And controlled to flow through the maximum pressure of the hydraulic oil of described first check valve (7) by described main overflow valve (8), and then control the maximum pressure of described hydraulic valve bank.
4. the banked direction control valves group at three pump interflow as claimed in claim 3, it is characterised in that control connection in the middle of described and also include:
Second throttle (10) and the second check valve (9), all it is connected with described second converging valve (3), the hydraulic oil flowing through described second check valve (9) is entered the control chamber of described second converging valve (3) by described second throttle (10), in order to control unlatching and the closedown of described second converging valve (3)；And controlled to flow through the maximum pressure of the hydraulic oil of described second check valve (9) by described main overflow valve (8), and then control the maximum pressure of described hydraulic valve bank.
5. the banked direction control valves group at three pump interflow as claimed in claim 4, it is characterized in that, an oil return opening (P4) is offered away from described middle one end controlling connection on described swing arm joins, on described dipper joins, offer another oil return opening (P3) away from described middle one end controlling connection, and two described oil return openings (P3, P4) are all connected with oil sump tank.
6. the banked direction control valves group at three pump interflow as described in claim 4 or 5, it is characterised in that the auxiliary oil-in (PF) being positioned on described swing arm connection is connected with the control chamber within described swing arm connection；The auxiliary oil-in (PF) being positioned on described dipper connection is connected with the control chamber within described dipper connection.
7. the banked direction control valves group at three pump interflow as claimed in claim 6, it is characterised in that
Control connection in the middle of described and also include the first bypass valve (1) and the second bypass valve (4), wherein, described first bypass valve (1) is connected each through oil circuit or petroleum pipeline with described first converging valve (2), left connection and the oil sump tank of performing；
Described second bypass valve (4) is connected each through oil circuit or petroleum pipeline with described second converging valve (3), right connection and the oil sump tank of performing.
8. the banked direction control valves group at three pump interflow as claimed in claim 7, it is characterized in that, described neutral control valve connection also includes the first control valve (0) and second and controls valve (5), and described first control valve (0) be connected with described first converging valve (2), described second control valve (5) is connected with described second converging valve (3).
9. the banked direction control valves group at three pump interflow as claimed in claim 8, it is characterised in that pressure 373bar when the normal pressure of described main overflow valve (8) is 343bar, boosting, it is 40mm that described straight line moving controls the latus rectum of spool in valve (V6).
10. a hydraulic crawler excavator, it is characterised in that there is the banked direction control valves group that three pumps as described in any one of claim 1-8 collaborate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610375318.7A CN105805074B (en) | 2016-05-31 | 2016-05-31 | A kind of the multichannel valve group and hydraulic crawler excavator at three pumps interflow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610375318.7A CN105805074B (en) | 2016-05-31 | 2016-05-31 | A kind of the multichannel valve group and hydraulic crawler excavator at three pumps interflow |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105805074A true CN105805074A (en) | 2016-07-27 |
| CN105805074B CN105805074B (en) | 2017-11-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106640820A (en) * | 2017-01-22 | 2017-05-10 | 山东常林机械集团股份有限公司 | Multipath control valve |
| CN106836365A (en) * | 2017-03-01 | 2017-06-13 | 江苏恒立液压科技有限公司 | Hydraulic multichannel valve system |
| CN107806320A (en) * | 2017-11-28 | 2018-03-16 | 恒天九五重工有限公司 | The auxiliary pump Confluent control system of rotary drilling rig main pump and its control method |
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| CN105805074B (en) | 2017-11-10 |
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