CN206478052U - A kind of rotary buffering valve, hydraulic control revolution buffering pilot control system and electro-hydraulic dual-purpose revolution buffering pilot control system - Google Patents

A kind of rotary buffering valve, hydraulic control revolution buffering pilot control system and electro-hydraulic dual-purpose revolution buffering pilot control system Download PDF

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Publication number
CN206478052U
CN206478052U CN201720085290.3U CN201720085290U CN206478052U CN 206478052 U CN206478052 U CN 206478052U CN 201720085290 U CN201720085290 U CN 201720085290U CN 206478052 U CN206478052 U CN 206478052U
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China
Prior art keywords
valve
fluid port
hydraulic fluid
hydraulic
oil
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Expired - Fee Related
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CN201720085290.3U
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Chinese (zh)
Inventor
张笑
赵燕
马邦国
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XCMG Construction Machinery Co Ltd
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XCMG Construction Machinery Co Ltd
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Priority to CN201720085290.3U priority Critical patent/CN206478052U/en
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Expired - Fee Related legal-status Critical Current
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Abstract

The utility model discloses a kind of rotary buffering valve, hydraulic control revolution buffering pilot control system and electro-hydraulic dual-purpose revolution buffering pilot control system, rotary buffering valve includes buffering valve body, and buffering valve body has two hydraulic fluid port A, and hydraulic fluid port C and hydraulic fluid port D;The main valve plug that can be controlled by guide oil is set in trimmer valve body, with with the electric proportional pressure control valve that can be opened according to main hydraulic fluid pressure, the oil-feed oil duct that the oil inlet of electric proportional pressure control valve is provided with line check valve by two-way is connected with hydraulic fluid port C and hydraulic fluid port D respectively, and the fuel-displaced oil duct that its oil-out is provided with oil outlet one-way valve by two-way is connected with hydraulic fluid port C and hydraulic fluid port D respectively.The beneficial effects of the utility model:Not only meet the requirement of electric control handle crane functions, moreover it is possible to meet the requirement of hydraulic control handle crane functions;According to pilot pressure signal or leader current signal controller can also be made to decide whether to start revolution buffering, so as to realize that the revolution under different operating modes is buffered by the setting of electric proportional pressure control valve different pressures value.

Description

A kind of rotary buffering valve, hydraulic control revolution buffer pilot control system and electro-hydraulic dual-purpose time Turn buffering pilot control system
Technical field
The invention belongs to technical field of engineering machinery, and in particular to a kind of rotary buffering valve, hydraulic control revolution buffering guide's control System processed and electro-hydraulic dual-purpose revolution buffering pilot control system.
Background technology
Current crane rotation trimmer valve realizes commutation, buffering, repairing and the free rotary function of crane rotation, revolution Start/stop impact problem is crane rotation system subject matter, typically now using pilot-operated type definite value overflow valve setting revolution buffering Value, when start/stop impact pressure reaches the value, precursor overflow valve is opened, and the connection that motor is imported and exported is realized, so as to realize buffering Function, usual revolution buffer value setting is larger to meet relatively large load operating mode needs, but when load pressure can not reach that this sets During definite value, then revolution buffering can not be realized, start/stop impact fluctuation is larger.
Hydraulic control pilot circuit being used rotary buffering valve, with two end caps, pilot pressure is controlled by hydraulic control handle more, it is real The commutation control of existing revolving valve, revolution pooling feature realizes that load pressure is applied to guide's overflow simultaneously using definite value overflow valve Valve two ends, when load pressure exceedes overflow valve guide's setting value, form fluid flowing, and pressure difference is formed at overflow valve two ends, main Overflow valve is opened, and is realized that motor two-port is connected, is realized pooling feature.
The defect of this control mode is:Revolving valve two end cap pilot control and oil return are external by extra oil pipe, even Connect complexity;Pilot control and oil return opening are only provided with end cap one end, the applicability installed is reduced;Automatically controlled end cap only realizes automatically controlled hand Handle function, hydraulic control end cap only realizes hydraulic control handle function, it is automatically controlled can not be general with hydraulic control complete machine;There is no guide's pressure obtaning device, no The further control of revolution can be realized;Revolution pooling feature, which is used, uses the overflow value under definite value overflow valve, different operating modes, when Revolution buffering is just opened when load pressure is higher, start/stop impact fluctuation is larger.
The content of the invention
It is an object of the invention to overcome not enough turned round there is provided a kind of rotary buffering valve, hydraulic control of the prior art to buffer Pilot control system and electro-hydraulic dual-purpose revolution buffering pilot control system, not only meet the requirement of electric control handle crane functions, also The requirement of hydraulic control handle crane functions can be met;According to pilot pressure signal or leader current signal controller can also be made to determine Whether startup revolution is buffered, so as to realize that the revolution under different operating modes is delayed by the setting of electric proportional pressure control valve different pressures value Punching.
To solve prior art problem, the invention discloses a kind of rotary buffering valve, including buffering valve body, buffering valve body tool There is the hydraulic fluid port P for connecting drum pump, for the hydraulic fluid port T of working connection oil return, and be respectively used to connection hydraulic motor both sides oil The hydraulic fluid port C and hydraulic fluid port D of mouth;Buffering valve body, which also has in two hydraulic fluid port A for being used to be respectively communicated with pilot control, trimmer valve body, to be set There is the main valve plug that under guide oil effect main hydraulic oil can be made to enter through hydraulic fluid port C or hydraulic fluid port D in hydraulic motor, and being capable of basis Main hydraulic fluid pressure and the electric proportional pressure control valve opened;The oil inlet of electric proportional pressure control valve is provided with line check valve by two-way Oil-feed oil duct connected respectively with hydraulic fluid port C and hydraulic fluid port D, its oil-out is provided with the fuel-displaced oil duct point of oil outlet one-way valve by two-way Do not connected with hydraulic fluid port C and hydraulic fluid port D.
The invention also discloses a kind of hydraulic control revolution buffering pilot control system, including:Hydraulic motor, foregoing revolution is delayed Rush valve, pressure sensor, and controller;Pressure sensor can detect guide's oil pressure, its output end and controller it is defeated Enter end electrical connection, the output end of controller is electrically connected with the input of electric proportional pressure control valve.
The invention also discloses the electro-hydraulic dual-purpose revolution buffering pilot control system of one kind, in electric control handle or hydraulic control hand Handle control is lower to realize that revolution is buffered, including:Hydraulic motor, foregoing rotary buffering valve, pressure sensor, controller, and two Individual leading controller;
Leading controller includes:Guide valve blocks and the electric proportional pressure-reducing valve being arranged in guide valve blocks;On guide valve blocks With hydraulic fluid port P2 and hydraulic fluid port a, also there is hydraulic fluid port P1 and hydraulic fluid port L at least one guide valve blocks;The oil inlet of electric proportional pressure-reducing valve Connected with hydraulic fluid port P1, its oil-out is connected with hydraulic fluid port a, its oil return opening is connected with hydraulic fluid port L;Buffer two hydraulic fluid port A difference of valve body Connected with the hydraulic fluid port a of guide valve blocks;Electric proportional pressure-reducing valve is at the first operating position, and its oil inlet is connected with its oil-out; During the second operating position, its oil-out is connected with oil return opening;
The input of controller and electric proportional pressure-reducing valve is used for the output end for connecting electric control handle, the output end of controller with The input electrical connection of electric proportional pressure control valve.
Further, guide valve blocks also have pressure measurement hydraulic fluid port, and pressure measurement hydraulic fluid port is connected with hydraulic fluid port a;It is provided with trimmer valve body Shuttle valve, the both sides hydraulic fluid port of shuttle valve is connected with two pressure measurement hydraulic fluid ports respectively;Pressure sensor is arranged in the fuel-displaced oil duct of shuttle valve.
Further, guide valve blocks are respectively provided with hydraulic fluid port P1 and hydraulic fluid port L.
Further, hydraulic fluid port P1 and hydraulic fluid port L connect to being arranged on the corresponding oil duct in guide valve blocks and in buffering valve body respectively It is logical.
Further, guide valve blocks are connected to the two ends of buffering valve body by bolt.
Further, it is provided with hydraulic damping on the oil duct between hydraulic fluid port P2 and hydraulic fluid port a.
The device have the advantages that:Not only meet the requirement of electric control handle crane functions, moreover it is possible to meet hydraulic control handle Crane functions requirement;According to pilot pressure signal or leader current signal controller can also be made to decide whether that starting revolution delays Punching, so as to realize that the revolution under different operating modes is buffered by the setting of electric proportional pressure control valve different pressures value.
Brief description of the drawings
Fig. 1 is the principle schematic of a preferred embodiment of the invention;
Fig. 2 is the front view of the first leading controller in embodiment illustrated in fig. 1;
Fig. 3 is the rearview of the first leading controller in embodiment illustrated in fig. 1;
Fig. 4 is the left view of the first leading controller in embodiment illustrated in fig. 1;
Fig. 5 is the sectional view of the first pressure measurement hydraulic fluid port of the first leading controller in embodiment illustrated in fig. 1;
Fig. 6 is the hydraulic fluid port L1 of the first leading controller in embodiment illustrated in fig. 1 sectional view;
Fig. 7 is the hydraulic fluid port Pa1 of the first leading controller in embodiment illustrated in fig. 1 sectional view;
Fig. 8 is the hydraulic fluid port Pa2 of the first leading controller in embodiment illustrated in fig. 1 sectional view;
Fig. 9 is the front view of the second leading controller in embodiment illustrated in fig. 1;
Figure 10 is the right view of the second leading controller in embodiment illustrated in fig. 1;
Figure 11 is the rearview of the second leading controller in embodiment illustrated in fig. 1;
Figure 12 is the sectional view of the second pressure measurement hydraulic fluid port of the second leading controller in embodiment illustrated in fig. 1;
Figure 13 is the hydraulic fluid port L2 of the second leading controller in embodiment illustrated in fig. 1 sectional view;
Figure 14 is the hydraulic fluid port Pb1 of the second leading controller in embodiment illustrated in fig. 1 sectional view
Figure 15 is the hydraulic fluid port Pb2 of the second leading controller in embodiment illustrated in fig. 1 sectional view.
Reference:
1 first electric proportional pressure-reducing valve;2 hydraulic dampings;3 shuttle valves;4 main valve plugs;5 electric proportional pressure control valves;6 pressure sensors;7 Controller;8 hydraulic motors;9 second electric proportional pressure-reducing valves;10 first guide's pressure measurement oil ducts;11 first automatically controlled pilot control oil ducts; 12 first oil return oil ducts;13 second guide's pressure measurement oil ducts;14 second automatically controlled pilot control oil ducts;15 second oil return oil ducts;16 delay Rush valve body;17 in line check valves;18 oil outlet one-way valves.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following examples are only used for clearly illustrating the present invention Technical scheme, and can not be limited the scope of the invention with this.
As shown in Fig. 1 to 15, a kind of electro-hydraulic dual-purpose revolution buffering pilot control system, in electric control handle or hydraulic control hand Handle control is lower to realize revolution buffering.
The system includes:Hydraulic motor 8, rotary buffering valve, pressure sensor 6, controller 7, and two pilot controls Device.
Rotary buffering valve includes buffering valve body 16, and buffering valve body 16 has the hydraulic fluid port P for being used for connecting main hydraulic oil, for returning Oil hydraulic fluid port T, hydraulic fluid port C and hydraulic fluid port D for connecting the both sides hydraulic fluid port of hydraulic motor 8, and two be used for connect pilot control Hydraulic fluid port A.
Buffer and shuttle valve 3 is set in valve body 16, main valve plug 4 and electric proportional pressure control valve 5.The oil inlet of electric proportional pressure control valve 5 leads to Cross two-way and be provided with the oil-feed oil duct of in line check valve and connected respectively with hydraulic fluid port C and hydraulic fluid port D, its oil-out is provided with by two-way The fuel-displaced oil duct of oil outlet one-way valve is connected with hydraulic fluid port C and hydraulic fluid port D respectively.The effect of main valve plug is main hydraulic oil is commutated, specifically Ground, main valve plug can be moved in the presence of the guide oil entered through hydraulic fluid port A so that main hydraulic oil enters through hydraulic fluid port C or hydraulic fluid port D Enter in hydraulic motor.
The oil inlet of electric proportional pressure control valve by two-way be provided with the oil-feed oil duct of in line check valve 17 respectively with hydraulic fluid port C and Hydraulic fluid port D is connected, and the fuel-displaced oil duct that its oil-out is provided with oil outlet one-way valve 18 by two-way is connected with hydraulic fluid port C and hydraulic fluid port D respectively.
Leading controller includes:Guide valve blocks and the electric proportional pressure-reducing valve being arranged in guide valve blocks.Guide valve blocks have There are hydraulic fluid port P1, hydraulic fluid port P2, hydraulic fluid port L, hydraulic fluid port a and pressure measurement hydraulic fluid port, guide valve blocks are connected by bolt with buffering valve body 16.
The oil inlet of electric proportional pressure-reducing valve is connected with hydraulic fluid port P1, and its oil-out is connected with hydraulic fluid port a, its oil return opening and hydraulic fluid port L Connection.Two hydraulic fluid port A of buffering valve body 16 are connected with the hydraulic fluid port a of each guide valve blocks respectively;Electric proportional pressure-reducing valve is in the first work When making position, its oil inlet is connected with its oil-out;At the second operating position, its oil-out is connected with oil return opening.
The both sides hydraulic fluid port of shuttle valve 3 is connected with the pressure measurement hydraulic fluid port on two guide valve blocks respectively.Between hydraulic fluid port P2 and hydraulic fluid port a Hydraulic damping 2 is provided with oil duct.Hydraulic fluid port P1 and hydraulic fluid port L on two guide valve blocks respectively by being arranged in guide valve blocks and Buffer the corresponding oil duct in valve body 16 or outside corresponding oil pipe formation connection.
Pressure sensor 6 is arranged in the fuel-displaced oil duct of shuttle valve 3, and the output end of pressure sensor 6 connects the defeated of controller 7 Enter end, the output end of controller 7 and the input connection electric control handle of electric proportional pressure-reducing valve, output end and the electricity ratio of controller 7 The input connection of example overflow valve 5.
As shown in figure 1, for the ease of description, the leading controller on the left of rotary buffering valve is designated as into the first pilot control Device, the electric proportional pressure-reducing valve in it is that the hydraulic fluid port P1 on the first electric proportional pressure-reducing valve 1, its guide valve blocks is designated as hydraulic fluid port Pa1, is used In external automatically controlled pilot control.Hydraulic fluid port P2 is designated as hydraulic fluid port Pa2, for external hydraulic control pilot control.Hydraulic fluid port L is designated as hydraulic fluid port L1, uses In oil return.Hydraulic fluid port a is designated as hydraulic fluid port a1, realizes that guide oil acts on main valve plug 4 for connecting hydraulic fluid port A.Pressure measurement hydraulic fluid port is designated as first Pressure measurement hydraulic fluid port.The guide valve blocks of the side have the first oil return oil duct 12 connected with hydraulic fluid port L1, the first electricity connected with hydraulic fluid port Pa1 Control pilot control oil duct 11, the first hydraulic control pilot control oil duct connected with hydraulic fluid port Pa2, and connected with the first pressure measurement hydraulic fluid port First guide's pressure measurement oil duct.First hydraulic control pilot control oil duct is also connected so that a part of hydraulic control with first guide's pressure measurement oil duct Pilot control can enter in shuttle valve 3 through first guide's pressure measurement oil duct.
Similarly, the leading controller on the right side of rotary buffering valve is designated as the second leading controller, the electric ratio in it Pressure-reducing valve is that the hydraulic fluid port P1 on the second electric proportional pressure-reducing valve 9, its guide valve blocks is designated as hydraulic fluid port Pb1, for external automatically controlled guide oil Source.Hydraulic fluid port P2 is designated as hydraulic fluid port Pb2, for external hydraulic control pilot control.Hydraulic fluid port L is designated as hydraulic fluid port L2, for oil return draining.Hydraulic fluid port a Hydraulic fluid port a2 is designated as, realizes that guide oil acts on main valve plug 4 for connecting hydraulic fluid port B.Pressure measurement hydraulic fluid port is designated as the second pressure measurement hydraulic fluid port.The side Guide valve blocks there is the second oil return oil duct 15 for connect with hydraulic fluid port L2, the automatically controlled pilot control of second connected with hydraulic fluid port Pb1 is oily Road 14, the second hydraulic control pilot control oil duct connected with hydraulic fluid port Pb2, and the second guide's pressure measurement connected with the second pressure measurement hydraulic fluid port Oil duct 13.Second hydraulic control pilot control oil duct is also connected with second guide's pressure measurement oil duct 13 so that two part hydraulic control pilot controls It can enter through second guide's pressure measurement oil duct 13 in shuttle valve 3.
First automatically controlled pilot control oil duct 11 is by buffering oil duct and the second automatically controlled pilot control oil duct 14 in valve body 16 Connection is so that hydraulic fluid port Pa1 is connected with hydraulic fluid port Pb1, and realization is from any one side joint electric control handle pilot control.First oil return oil duct 12 are connected by buffering the oil duct in valve body 16 with the second oil return oil duct 15 so that hydraulic fluid port L1 is connected with hydraulic fluid port L2, are realized from appointing The meaning direct oil return in side.
The operation principle and process of the present invention
Revolution cushioning control is carried out using electric control handle
As shown in figure 1, by taking the hydraulic fluid port Pb1 of the second leading controller and hydraulic fluid port L2 closure as an example:Hydraulic fluid port Pa1 leads to guide Oil, towards the first electric proportional pressure-reducing valve 1, the guide oil passes through the first automatically controlled pilot control oil duct 11, valve body oil duct and the simultaneously Two automatically controlled pilot control oil ducts 14 lead to the second electric proportional pressure-reducing valve 9.The first electricity ratio is applied to when there is electric control handle current signal During example pressure-reducing valve 1, pressure-reducing valve is in the first operating position, and the second electric proportional pressure-reducing valve 9 is in the second operating position, and first subtracts Control pressure, which acts on the left end of main valve plug 4, after pressure valve valve makes it move right, because main valve plug is moved so as to will be originally It is present in the hydraulic oil in the second guide device and passes sequentially through the second electric proportional pressure-reducing valve 9, the second oil return oil duct 15, valve body oil duct And first oil return oil duct 12 lead to hydraulic fluid port L1, realize oil return.
When electric control handle is quickly turned on and off, electric control handle current signal is delivered to controller 7, the basis of controller 7 The current signal judges whether to need to set the oil pressure relief of electric proportional pressure control valve.If necessary to set then further root Set according to actual condition, otherwise will give tacit consent to initial oil pressure relief.When the end pressure of hydraulic motor 8 one reaches the electric proportional overflow During the setting value of valve 5, overflow valve is opened, and main hydraulic oil enters by line check valve, electric proportional pressure control valve 5 and oil outlet one-way valve Hydraulic motor connects the two ends of hydraulic motor 8, realizes revolution buffering.
When the second electric proportional pressure-reducing valve 9 it is electric be in the first operating position, and the first electric proportional pressure-reducing valve 1 is in the second work When making position, guide oil is applied to main valve plug 4 after entering the second electric proportional pressure-reducing valve 9 by the first automatically controlled pilot control oil duct Right-hand member realize commutation, and the guide oil in the first guide device in the presence of the left end of main valve plug 4 from the direct oil returns of hydraulic fluid port L1, delay Rush principle similar to the above.When hydraulic fluid port Pa1 and hydraulic fluid port the L1 closure of the first leading controller, control principle and above-mentioned class Seemingly, thus repeat no more.
Revolution cushioning control is carried out using hydraulic control handle
Hydraulic fluid port Pa1, the hydraulic fluid port L1 of first leading controller and hydraulic fluid port Pb1, the hydraulic fluid port L2 of the second leading controller are equal Closure.So that hydraulic control handle is applied to hydraulic fluid port Pa2 as an example, the pressure of guide oil is directly acted on by the first hydraulic control pilot control oil duct Left end to main valve plug 4 moves to right it, and the hydraulic oil in the second guide device is directly over the under the right-hand member effect of main valve plug 4 Two hydraulic control handle pilot control oil ducts are to hydraulic fluid port Pb2 oil returns.
When hydraulic control handle is quickly opened or during quick closedown, guide oil via first guide's pressure measurement oil duct, valve body oil duct simultaneously Selected through shuttle valve 3 and the collection pressure signal of pressure sensor 6, be then passed to controller 7, controller 7 is according to this pilot pressure Judge whether to need to set the oil pressure relief of electric proportional pressure control valve.If necessary to setting then further according to actual condition Set, otherwise will give tacit consent to initial oil pressure relief.When the end pressure of hydraulic motor 8 one reaches the setting value, hydraulic oil passes through Check valve realizes that the both sides hydraulic fluid port of hydraulic motor 8 is connected with overflow valve, realizes revolution buffering.When hydraulic control handle is applied to hydraulic fluid port Pb2 When, control principle is similar to the above, therefore no longer repeats.
In the present invention, pilot pressure signal acquisition mode also can be without valve body, and individually designed valve block is realized.Two ends guide Oil sources and oil return opening can also be connected by external oil pipe, not pass through valve inner oil duct.The system not only meets electric control handle and risen Heavy-duty machine functional requirement, moreover it is possible to meet the requirement of hydraulic control handle crane functions;Pilot control and oil return can connect any one elder generation Control device is led, the applicability of leading controller has been widened significantly;Can also by pilot pressure signal or leader current signal, Controller is made to decide whether to start revolution buffering, so that different operating modes are realized in the setting by electric proportional pressure control valve different pressures value Under revolution buffering.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, without departing from the technical principles of the invention, some improvement and deformation can also be made, these improve and deformed Also it should be regarded as protection scope of the present invention.

Claims (8)

1. a kind of rotary buffering valve, including buffering valve body, the buffering valve body have the hydraulic fluid port P for being used for connecting drum pump, are used for The hydraulic fluid port T of working connection oil return, and it is respectively used to connect the hydraulic fluid port C and hydraulic fluid port D of hydraulic motor both sides hydraulic fluid port, it is characterised in that: Also there are the buffering valve body two to be used to be respectively communicated with the hydraulic fluid port A of pilot control, the trimmer valve body, and be provided with can be Make the main valve plug that main hydraulic oil enters in hydraulic motor through hydraulic fluid port C or hydraulic fluid port D under guide oil effect, and can be according to main hydraulic oil Pressure and the electric proportional pressure control valve opened;The oil inlet of the electric proportional pressure control valve is provided with entering in line check valve by two-way Oil duct is connected with hydraulic fluid port C and hydraulic fluid port D respectively, its oil-out by two-way be provided with the fuel-displaced oil duct of oil outlet one-way valve respectively with The hydraulic fluid port C is connected with hydraulic fluid port D.
2. a kind of hydraulic control revolution buffering pilot control system, including hydraulic motor, it is characterised in that:Also include:Such as claim 1 A kind of described rotary buffering valve, pressure sensor, and controller;The pressure sensor can detect guide's oil pressure, Its output end is electrically connected with the input of the controller, the output end of the controller and the input of the electric proportional pressure control valve End electrical connection.
3. a kind of electro-hydraulic dual-purpose revolution buffering pilot control system, for realizing revolution under electric control handle or the control of hydraulic control handle Buffering, including hydraulic motor, it is characterised in that:Also include:A kind of rotary buffering valve as claimed in claim 1, pressure sensing Device, controller, and two leading controllers;
The leading controller includes:Guide valve blocks and the electric proportional pressure-reducing valve being arranged in the guide valve blocks;The elder generation Having on pilot valve body also has hydraulic fluid port P1 and hydraulic fluid port L on hydraulic fluid port P2 and hydraulic fluid port a, at least one guide valve blocks;The electric ratio subtracts The oil inlet of pressure valve is connected with the hydraulic fluid port P1, and its oil-out is connected with the hydraulic fluid port a, and its oil return opening is connected with the hydraulic fluid port L; Two hydraulic fluid port A of the buffering valve body are connected with the hydraulic fluid port a of the guide valve blocks respectively;The electric proportional pressure-reducing valve is in the first work When making position, its oil inlet is connected with its oil-out;At the second operating position, its oil-out is connected with oil return opening;
The input of the controller and the electric proportional pressure-reducing valve is used for the output end for connecting electric control handle, the controller Output end is electrically connected with the input of the electric proportional pressure control valve.
4. the electro-hydraulic dual-purpose revolution buffering pilot control system of one kind according to claim 3, it is characterised in that:The guide Valve body also has pressure measurement hydraulic fluid port, and the pressure measurement hydraulic fluid port is connected with the hydraulic fluid port a;Shuttle valve is provided with the trimmer valve body, it is described The both sides hydraulic fluid port of shuttle valve is connected with two pressure measurement hydraulic fluid ports respectively;The pressure sensor is arranged at the fuel-displaced oil duct of the shuttle valve In.
5. the electro-hydraulic dual-purpose revolution buffering pilot control system of one kind according to claim 3, it is characterised in that:The guide Valve body is respectively provided with the hydraulic fluid port P1 and the hydraulic fluid port L.
6. the electro-hydraulic dual-purpose revolution buffering pilot control system of one kind according to claim 5, it is characterised in that:Hydraulic fluid port P1 and Hydraulic fluid port L is connected to being arranged on the corresponding oil duct in the guide valve blocks and in the trimmer valve body respectively.
7. the electro-hydraulic dual-purpose revolution buffering pilot control system of one kind according to claim 3, it is characterised in that:The guide Valve body is connected to the two ends of the buffering valve body by bolt.
8. the electro-hydraulic dual-purpose revolution buffering pilot control system of one kind according to claim 3, it is characterised in that:The hydraulic fluid port Hydraulic damping is provided with oil duct between P2 and the hydraulic fluid port a.
CN201720085290.3U 2017-01-23 2017-01-23 A kind of rotary buffering valve, hydraulic control revolution buffering pilot control system and electro-hydraulic dual-purpose revolution buffering pilot control system Expired - Fee Related CN206478052U (en)

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CN201720085290.3U CN206478052U (en) 2017-01-23 2017-01-23 A kind of rotary buffering valve, hydraulic control revolution buffering pilot control system and electro-hydraulic dual-purpose revolution buffering pilot control system

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Application Number Priority Date Filing Date Title
CN201720085290.3U CN206478052U (en) 2017-01-23 2017-01-23 A kind of rotary buffering valve, hydraulic control revolution buffering pilot control system and electro-hydraulic dual-purpose revolution buffering pilot control system

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106762924A (en) * 2017-01-23 2017-05-31 徐工集团工程机械有限公司 A kind of rotary buffering valve, hydraulic control revolution buffering pilot control system and electro-hydraulic dual-purpose revolution buffering pilot control system
CN109914515A (en) * 2019-03-29 2019-06-21 三一重机有限公司 Turn round operation control system and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106762924A (en) * 2017-01-23 2017-05-31 徐工集团工程机械有限公司 A kind of rotary buffering valve, hydraulic control revolution buffering pilot control system and electro-hydraulic dual-purpose revolution buffering pilot control system
CN109914515A (en) * 2019-03-29 2019-06-21 三一重机有限公司 Turn round operation control system and method
CN109914515B (en) * 2019-03-29 2021-04-09 三一重机有限公司 Swing operation control system and method

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