CN204164074U - Multi-way valve and hydraulic flow shared system - Google Patents
Multi-way valve and hydraulic flow shared system Download PDFInfo
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- CN204164074U CN204164074U CN201420604298.2U CN201420604298U CN204164074U CN 204164074 U CN204164074 U CN 204164074U CN 201420604298 U CN201420604298 U CN 201420604298U CN 204164074 U CN204164074 U CN 204164074U
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Abstract
The utility model relates to a kind of multi-way valve and hydraulic flow shared system, multi-way valve comprises first valve body, tail connection valve body and is arranged on the multiple work connection valve bodies between first valve body and tail connection valve body, main valve in multiple work connection valve body is Center-Close, and is also provided with recuperation valve in each work connection valve body; First valve body is provided with load pressure charging valve and meta unloading valve, the filler opening of load pressure charging valve is communicated with load-sensitive oil circuit with the working connection of multi-way valve respectively with oil outlet, the band spring control end of load pressure charging valve is communicated with load-sensitive oil circuit with the load oil circuit control of multi-way valve respectively with without spring control end, the filler opening of meta unloading valve is communicated with oil circuit with the working connection of multi-way valve respectively with oil outlet, and the band spring control end of meta unloading valve is communicated with load-sensitive oil circuit with the working connection of multi-way valve respectively with without spring control end.The utility model can realize anti-saturation function, and solves the problem of the dynamic respond overshoot of pressure-compensated valve.
Description
Technical field
The utility model relates to hydraulic machinery field, particularly relates to a kind of multi-way valve and hydraulic flow shared system.
Background technique
In the hydraulic machinery of multiple industries such as engineering, metallurgy, mine, water conservancy, often require many actuators compound motion together in the course of the work.For engineering machinery, in this compound motion process, when the flow of pump occurs saturated, the flow of each actuator is subject to the impact of load and no longer proportional with the aperture of main valve, and this can bring very large impact to the operability of engineering machinery.In order to address this problem, propose anti-saturation technique, namely when the flow of pump reaches capacity, the motion of Ge Lian actuator is still proportional with the aperture of main valve, ensure that the stability that each actuator handles.
At present in load sensitive system, the mode of secon-dary pressure compensation is usually adopted to carry out anti-saturation.What secon-dary pressure compensation adopted is the method reduced pressure after first throttling, and when many actuators composite move, each connection main valve keeps same pressure reduction, realizes flow and aperture is proportional; When pump arrives saturated, each connection main valve pressure reduction is unified to decline, but after declining, pressure reduction is consistent, so ensure main valve aperture and flow proportional.
The main mode with valve post-compensation realizes secon-dary pressure compensation at present, namely in every connection, arranges a pressure-compensated valve, after the position of pressure-compensated valve is arranged on main valve stem, reduces pressure after ensureing the first throttling of fluid.During main valve events, pressure-compensated valve by the pressure feedback after main valve throttling to variable displacement pump Stress control end, main valve valve port two ends are made to keep constant pressure difference by the setting of pressure adjusting spring, thus main valve aperture is directly proportional to flow, during composite move, because the induced pressure needed for each is different from flow, control each flow by main valve, by pressure-compensated valve, each pressure is reduced pressure, thus realize the self adaption of pressure versus flow.When the flow of pump reaches capacity, main valve valve port two ends pressure reduction is unified to decline, the flow of each main valve is still proportional with main valve aperture, and the decompression of pressure-compensated valve is not by the impact that pump duty is saturated, still can realize the self adaption of pressure versus flow, and then ensure that the co-ordination of Ge Lian actuator.
Although current pressure-compensated valve can realize anti-saturation function, but still there are some problems: be first that pressure-compensated valve exists displacement response problem, existing pressure-compensated valve is generally step displacement response, realized the increase and decrease of flow by the pressure loss under different flow, because recuperation valve displacement is phase step response signals, under the effect having pilot pressure, the dynamic respond overshoot of pressure-compensated valve is large, easy shock plug or limit stoper, especially each moment started all can produce very large impact; Next is the loss problem of pressure signal transmission, pressure signal transmission is carried out the outlet pressure of control pump by pressure-compensated valve to load feedback passage by damping hole, but due to the pressure loss of recuperation valve and pipeline, delivery side of pump pressure is reduced, thus the pressure reduction at main valve two ends is diminished, have impact on the peak rate of flow of main valve.
Model utility content
The purpose of this utility model proposes a kind of multi-way valve and hydraulic flow shared system, can realize anti-saturation function, and solve the problem of the dynamic respond overshoot of pressure-compensated valve.
For achieving the above object, the utility model provides a kind of multi-way valve, comprise first valve body, tail connection valve body and be arranged on the multiple work connection valve bodies between described first valve body and tail connection valve body, wherein, main valve in described multiple work connection valve body is Center-Close, and also recuperation valve is provided with in each work connection valve body, a control end of described recuperation valve is communicated with the load-sensitive oil circuit of described multi-way valve, and each work connection load feedback of valve body is communicated with the load oil circuit control of described multi-way valve, described first valve body is provided with load pressure charging valve and meta unloading valve, the filler opening of described load pressure charging valve is communicated with load-sensitive oil circuit with the working connection of described multi-way valve respectively with oil outlet, the band spring control end of described load pressure charging valve is communicated with load-sensitive oil circuit with the load oil circuit control of described multi-way valve respectively with without spring control end, the filler opening of described meta unloading valve is communicated with oil circuit with the working connection of described multi-way valve respectively with oil outlet, the band spring control end of described meta unloading valve is communicated with load-sensitive oil circuit with the working connection of described multi-way valve respectively with without spring control end.
Further, the load cavity of described recuperation valve and the load oil circuit control of described multi-way valve are by one-way valve unilaterally connected.
Further, the oil circuit that each control end of described load pressure charging valve, described meta unloading valve and described recuperation valve is corresponding is equipped with damping, is also provided with damping between the filler opening of described load pressure charging valve and the working connection of described multi-way valve.
Further, be also provided with the first relief valve at described first valve body, the filler opening of described first relief valve is communicated with oil circuit with the working connection of described multi-way valve respectively with return opening.
Further, described tail connection valve body is provided with the second relief valve and pressure compensation throttle valve, between the working connection that described second relief valve and pressure compensation throttle valve are parallel to described multi-way valve and oil circuit.
Further, main valve at least one work connection valve body in described multiple work connection valve body can realize float function, the two ends realizing the spool of the main valve of float function are respectively equipped with the damping hole be communicated with by spool internal channel, the described main valve realizing float function hides damping hole spool corresponding to oil circuit when being switched to working position, the described filler opening realizing the main valve of float function is only communicated with corresponding actuator port, and the damping hole when being switched to floating position, spool corresponding to oil circuit is communicated with oil circuit, the described filler opening realizing the main valve of float function is all communicated with return opening and two actuator ports.
Further, join in described multiple work in the working oil path connecting executive component in valve body and be also provided with the 3rd relief valve.
For achieving the above object, the utility model provides a kind of hydraulic flow shared system, comprises the pump stroking mechanism of hydraulic oil container, load sensitive pump and correspondence, wherein, also comprise aforesaid multi-way valve, described load sensitive pump provides hydraulic power by described multi-way valve to multiple executive component.
Further, described load-sensitive delivery side of pump is communicated with the working connection of described multi-way valve by the first valve body of described multi-way valve, the control port of described pump stroking mechanism is communicated with the load-sensitive oil circuit of described multi-way valve by the tail connection valve body of described multi-way valve, and the actuator port on multiple work connection valve bodies of described multi-way valve is respectively used to connect corresponding executive component.
Further, the oil circuit between the control port and the load-sensitive oil circuit of described multi-way valve of described pump stroking mechanism is also provided with damping.
Based on technique scheme, the utility model realizes hydraulic flow by the cooperation of load pressure charging valve and recuperation valve and shares, the multiple executive components solving multi-way valve connection when pump duty reaches capacity carry out the coordination problem of composite move, recuperation valve is also made to obtain good placement property by load pressure charging valve, eliminate the Impact Problems of recuperation valve, and then eliminate the noise clashing into and produce, and the pressure adjusting spring of load pressure charging valve self also effectively compensate for the pressure loss of load-sensitive feedback channel, ensure that the peak rate of flow of work connection valve body.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, and form a application's part, schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the hydraulic principle schematic diagram of an embodiment of the utility model hydraulic flow shared system.
Fig. 2 is the structural representation of a kind of first valve body example in the utility model multi-way valve embodiment.
Fig. 3,4 is the oil circuit connected relation schematic diagram of main valve respectively when working position and floating position that can realize float function in the utility model multi-way valve embodiment.
Embodiment
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
As shown in Figure 1, be the hydraulic principle schematic diagram of an embodiment of the utility model hydraulic flow shared system.In the present embodiment, the pump stroking mechanism 2 that hydraulic flow shared system comprises hydraulic oil container 28, load sensitive pump 1 and correspondence and the multi-way valve surrounded by the dot and dash line of maximum magnitude, load sensitive pump 1 provides hydraulic power by this multi-way valve to multiple executive components 17,20,24 etc.This multi-way valve comprises first valve body, tail connection valve body and is arranged on the multiple work connection valve bodies between first valve body and tail connection valve body, wherein first valve body corresponds to first region that Fig. 1 chain lines on the left side surrounds, tail connection valve body corresponds to first region that Fig. 1 chain lines surrounds on the right, multiple work connection valve body is then positioned at first valve body and tail joins valve body between the two, and the region still surrounded by dot and dash line is to divide different work connection valve bodies.
Specific to load sensitive pump in Fig. 11, pump stroking mechanism 2, hydraulic oil container 28 and each executive component 17, 20, 24 and the connected relation of multi-way valve, then load sensitive pump 1 is from hydraulic oil container 28 oil suction, the first valve body of multi-way valve is transported to again by outlet, be communicated with the working connection of this multi-way valve by first valve body, control port for the pump stroking mechanism 2 of the outlet discharge capacity of control load sensitive pump 1 is then communicated with the load-sensitive oil circuit LS of multi-way valve by tail connection valve body, actuator port on multiple work connection valve bodies of multi-way valve is respectively used to connect corresponding executive component 17, 20, 24.
In Fig. 1 embodiment, main valve 14,21,22 in multiple work connection valve bodies in multi-way valve is Center-Close, and recuperation valve 11,18 is also provided with in each work connection valve body, a control end of recuperation valve is communicated with the load-sensitive oil circuit LS of multi-way valve, and each work connection load feedback of valve body is communicated with the load oil circuit control LC of multi-way valve.It should be noted that, in Fig. 1, not all hydraulic device and structure all mark, such as, in Fig. 1 each work connection valve body due to internal structure substantially identical, therefore mainly valve body is joined for the work of the leftmost side when subsequent descriptions structure, and other work connection valve body only marks the hydraulic component of necessity and structure, with reference to the work connection valve body of the leftmost side, below this can be repeated no more when understanding the structure and working principle of other work connection valve body.
First valve body is provided with load pressure charging valve 6 and meta unloading valve 3, the filler opening of load pressure charging valve 6 is communicated with load-sensitive oil circuit LS with the working connection of multi-way valve respectively with oil outlet, the band spring control end of load pressure charging valve 6 is communicated with load-sensitive oil circuit LS with the load oil circuit control LC of multi-way valve respectively with without spring control end, the filler opening of meta unloading valve 3 is communicated with oil circuit with the working connection of multi-way valve respectively with oil outlet, and the band spring control end of meta unloading valve 3 is communicated with load-sensitive oil circuit LS with the working connection of multi-way valve respectively with without spring control end.
In order to the pressure signal making the work of higher load join valve body reversely cannot pass to the pressure control cavity of the recuperation valve on the work connection of lower load, one-way valve 12 can be set between the load cavity of recuperation valve 11 and load oil circuit control LC, come by one-way valve 12 unilaterally connected, and then recuperation valve 11 two ends pressure reduction is stablized, the impact of load pressure signal can not be subject to, ensure that the compensate function of recuperation valve is stablized, reduce fluctuation.
Consider flow ability to bear and the flow control needs of each hydraulic element, damping 7 can be set at the oil circuit corresponding to spring control end that have of load pressure charging valve 6, at the oil circuit corresponding without spring control end, damping 8 is set, and meta unloading valve 3 has oil circuit corresponding to spring control end due to the LS pressure signal all adopting load pressure charging valve 6 to export without spring control end with load pressure charging valve 6, therefore damping 8 can be shared, and the oil circuit corresponding without spring control end of meta unloading valve 3 is provided with damping 5, damping 4 is provided with between the filler opening of load pressure charging valve 6 and the working connection of multi-way valve.For work connection valve body, the oil circuit that the control end of recuperation valve 11 is corresponding is also provided with damping 10 etc.For multi-way valve of the present utility model, designer can need to arrange damping in corresponding position according to the function of multi-way valve, has just repeated no longer one by one here.
In first valve body, can also arrange the first safe relief valve 9 on working connection, the filler opening by the first relief valve 9 is communicated with oil circuit with the working connection of multi-way valve respectively with return opening, to realize overload protection function.
Load sensitive pump 1 exports with maximum pump discharge when starting fuel feeding, peak rate of flow is provided to system, but now because the main valve of each work connection valve body is Center-Close, flow can be stagnated on the working connection between the outlet and the import of each main valve of load sensitive pump 1, along with the continuous input of pump duty, stagnation pressure is increased gradually, load pressure charging valve 6 is flowed to by damping 4, the outlet pressure of load pressure charging valve 6 is spring set pressure, this spring set pressure is fed back to recuperation valve 11 by LS passage, 18, and this LS pressure signal also can feed back to the flow compensator of load sensitive pump 1.When the outlet pressure of load sensitive pump 1 exceedes spring set pressure and the flow compensator set pressure value sum of load pressure charging valve 7, pump stroking mechanism 2 makes its variable angle diminish, until minimum variable, thus load sensitive pump 1 is worked under minimum injection rate, and stagnation pressure constantly increases, when pressure reaches the set pressure of meta unloading valve 3, start off-load, load sensitive pump 1 can be made to maintain low-pressure low flow armed state by this process.
For the work of leftmost side connection valve body, when the right position work of the main valve 14 in this valve body, hydraulic flow in working connection flows to recuperation valve 11 via the throttle structure on main valve 14, back down one-way valve 13 by the hydraulic flow of recuperation valve 11 and flow to executive component 17, and now back down one-way valve 12, the induced pressure of this executive component 17 is input in LC passage.What the LC pressure signal of LC passage fed back to load pressure charging valve 6 through damping 7 has spring control end, load pressure charging valve 6 carries out supercharging by spring to load feedback pressure, LS passage is flowed to as LS pressure signal after supercharging, simultaneously by damping 8 feed back to load pressure charging valve 6 without spring control end, what also feed back to meta unloading valve 3 has spring control end simultaneously, thus meta unloading valve 3 cuts out.The parallel connection of LS pressure signal is supplied to the oil circuit control of each recuperation valve, finally can feed back to flow compensator by the damping 26 be arranged on the oil circuit between the control port of pump stroking mechanism 2 and LS passage, thus make the outlet pressure of load sensitive pump 1 and LS pressure signal keep fixed poor, and LS pressure signal feeds back on the control end of recuperation valve 11 by damping 10, thus make recuperation valve inlet pressure consistent with LS feedback pressure, ensure that the inlet outlet pressure differential of main valve 14 and the flow compensator of load sensitive pump 1 set up pressure reduction consistent, and then achieve load-sensitive function.
Arranged by the pressure adjusting spring of load pressure charging valve 6, make the import and export of recuperation valve 11 also keep certain pressure reduction, and then make recuperation valve 11 valve core opening proportional in flow, avoid the displacement step response of previously research.In addition, this load pressure charging valve 6 can also achieve the compensation of the pressure loss of LS passage by arranging applicable damping 10 and damping 26 size.When executive component 17 and 20 carries out composite move, suppose that executive component 20 load is larger, induced pressure feeds back to LC passage by one-way valve 19, because executive component 17 induced pressure is lower, one-way valve 12 is closed, highest load pressure feeds back to load pressure charging valve 6, makes recuperation valve 11,18 and flow compensator obtain identical pilot pressure, and then ensure that the pressure reduction at main valve 14,21 two ends is constant.When the flow of load sensitive pump reaches capacity, pump discharge pressure reduces, and the control end of recuperation valve 11,18 is still the highest feedback pressure signal of LS, and main valve 14,21 valve port pressure reduction synchronously reduces, but still keeps constant pressure difference, thus it is shared to achieve flow.
Fig. 2 shows the concrete structure of a kind of first valve body example in the utility model multi-way valve embodiment, and wherein first valve body comprises body 30, the meta unloading valve structure 31 corresponding to the meta unloading valve 3 in Fig. 1, the load pressure charging valve structure 32 corresponding to the load pressure charging valve 6 in Fig. 1 and corresponds to the structure of relief valve 33 etc. of the first relief valve 9 in Fig. 1.Spool two control ends of meta unloading valve structure 31 are respectively equipped with damping hole 34 and 35, during the oil inlet P oil-feed of body 30, also damping hole 34 and 35 is flowed to while direction of flow work connection valve body, the flow flowing to damping hole 34 for control meta unloading valve structure 31 without spring control end, and the flow flowing to damping hole 35 enters into the oil inlet P of load pressure charging valve structure 32, by flowing to LS passage and damping hole 36 after the supercharging of load pressure charging valve structure 32, flow to fluid one end for control load pressure charging valve structure 32 and the control end of meta unloading valve structure 31 of damping hole 36.
When the connection that works does not work, the pilot pressure of a LC control end feedback spring of load pressure charging valve structure 32, corresponding outlet LS pressure is just the set pressure of this spring, this pressure also feeds back to the spring control end of meta unloading valve structure 31 while of feeding back to one end of load pressure charging valve structure 32 by damping hole 36, make meta pressure unloading be meta unloading spring set pressure and LS feedback pressure active area power sum.When work connection work, work connection induced pressure feeds back to the spring terminal of load pressure charging valve structure 32 by damping hole 37, the spool of load pressure charging valve structure 32 is moved to the left, LS outlet pressure increases gradually, finally make LS pressure be load feedback pressure and pressure charging valve set pressure sum, under equilibrium of forces, make spool stablize, in this pressure adjustment process, complete all instantaneously, there is not the links such as delayed.LS pressure feedback to work connection valve body in recuperation valve and load sensitive pump pump stroking mechanism, thus make work join valve body main valve restriction pressure reduction keep constant.
If do not adopt this load pressure charging valve, then working connection pressure is directly by the control end of LS channeling to recuperation valve, thus makes main valve valve port not have pressure reduction, and fluid can not flow.And if directly by the control end of load feedback pressure feedback to recuperation valve, so the placement property of recuperation valve is step displacement response, easy shock valve body, flow sharing characteristic is poor, this is the problem that will correct of the utility model just, and therefore the Flow-rate adjustment of this load pressure charging valve to flow shared system plays a part to pass property.
In order to avoid overload and the fluctuation of LS pressure signal, valve body can be joined at tail and the second relief valve 27 and pressure compensation throttle valve 25 are set, second relief valve 27 and pressure compensation throttle valve 25 are parallel between the working connection of multi-way valve and oil circuit, wherein pressure compensation throttle valve 25 can specifically comprise the filter of connecting successively, damping and reduction valve, by arranging the second relief valve 27, the overload protection of LS pressure signal can be realized, and by arranging pressure compensation throttle valve 25, filter action can be played to LS pressure signal, eliminate induced pressure and change the pressure surge caused, flow system flow is stablized.
For each work connection valve body, the working oil path of its connection executive component can also arrange the 3rd relief valve 15,16, be used for joining to each work the overload protection function that valve body provides working pressure.
Multi-way valve of the present utility model can also realize float function according in the main valve of requirement of engineering at least one work connection valve body, and the main valve 22 of the work connection valve body of the rightmost side can realize float function in Fig. 1, compared to main valve 14 and main valve 21, main valve 22 has the 4th working position 23 and (is defined as floating position herein, for being different from general working position), as can see from Figure 1, under this floating position, the filler opening of main valve 22 is all communicated with return opening and two actuator ports.Realize specific to valve inner structure, Fig. 3,4 respectively illustrates the oil circuit connected relation of main valve 22 respectively when working position and floating position.Wherein, the two ends being arranged on the spool in the main valve hole of main valve 22 are respectively equipped with the damping hole 56,54 be communicated with by spool internal channel, when main valve 22 is when being switched to working position (namely general working position), main valve hole can hide the damping hole 56 spool corresponding to oil circuit T, the oil inlet P of main valve 22 is only communicated with corresponding actuator port A, and when being switched to floating position, the damping hole 56 spool corresponding to oil circuit is communicated with oil circuit, and the oil inlet P of main valve 22 is all communicated with oil return inlet T and two actuator ports A, B.
So just by the relative position relation of valve core of main valve and valve body, main valve is made to have the float function of the 4th.For example, if when obstacle encountered by the dozer of excavator, as dozer does not have float function, then load increases until system overflow always, and now digging machine can't surmount obstacles, and adopts the main valve with float function, when obstacle encountered by dozer, dozer two cavity oil pressure communicates with return opening, and dozer lifts, thus clears the jumps.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although be described in detail the utility model by embodiment, those of ordinary skill in the field have been to be understood that: still can modify to embodiment of the present utility model or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technological scheme scope of the utility model request protection.
Claims (10)
1. a multi-way valve, comprise first valve body, tail connection valve body and be arranged on the multiple work connection valve bodies between described first valve body and tail connection valve body, it is characterized in that, main valve in described multiple work connection valve body is Center-Close, and also recuperation valve is provided with in each work connection valve body, a control end of described recuperation valve is communicated with the load-sensitive oil circuit of described multi-way valve, and each work connection load feedback of valve body is communicated with the load oil circuit control of described multi-way valve, described first valve body is provided with load pressure charging valve and meta unloading valve, the filler opening of described load pressure charging valve is communicated with load-sensitive oil circuit with the working connection of described multi-way valve respectively with oil outlet, the band spring control end of described load pressure charging valve is communicated with load-sensitive oil circuit with the load oil circuit control of described multi-way valve respectively with without spring control end, the filler opening of described meta unloading valve is communicated with oil circuit with the working connection of described multi-way valve respectively with oil outlet, the band spring control end of described meta unloading valve is communicated with load-sensitive oil circuit with the working connection of described multi-way valve respectively with without spring control end.
2. multi-way valve according to claim 1, is characterized in that, the load cavity of described recuperation valve and the load oil circuit control of described multi-way valve are by one-way valve unilaterally connected.
3. multi-way valve according to claim 1 and 2, it is characterized in that, the oil circuit that each control end of described load pressure charging valve, described meta unloading valve and described recuperation valve is corresponding is equipped with damping, is also provided with damping between the filler opening of described load pressure charging valve and the working connection of described multi-way valve.
4. multi-way valve according to claim 3, is characterized in that, is also provided with the first relief valve at described first valve body, and the filler opening of described first relief valve is communicated with oil circuit with the working connection of described multi-way valve respectively with return opening.
5. multi-way valve according to claim 1, is characterized in that, described tail connection valve body is provided with the second relief valve and pressure compensation throttle valve, between the working connection that described second relief valve and pressure compensation throttle valve are parallel to described multi-way valve and oil circuit.
6. multi-way valve according to claim 1, it is characterized in that, main valve at least one work connection valve body in described multiple work connection valve body can realize float function, the two ends realizing the spool of the main valve of float function are respectively equipped with the damping hole be communicated with by spool internal channel, the described main valve realizing float function hides damping hole spool corresponding to oil circuit when being switched to working position, the described filler opening realizing the main valve of float function is only communicated with corresponding actuator port, and the damping hole when being switched to floating position, spool corresponding to oil circuit is communicated with oil circuit, the described filler opening realizing the main valve of float function is all communicated with return opening and two actuator ports.
7. multi-way valve according to claim 1, is characterized in that, joins in the working oil path connecting executive component in valve body be also provided with the 3rd relief valve in described multiple work.
8. a hydraulic flow shared system, comprise the pump stroking mechanism of hydraulic oil container, load sensitive pump and correspondence, it is characterized in that, also comprise the arbitrary described multi-way valve of claim 1 ~ 7, described load sensitive pump provides hydraulic power by described multi-way valve to multiple executive component.
9. hydraulic flow shared system according to claim 8, it is characterized in that, described load-sensitive delivery side of pump is communicated with the working connection of described multi-way valve by the first valve body of described multi-way valve, the control port of described pump stroking mechanism is communicated with the load-sensitive oil circuit of described multi-way valve by the tail connection valve body of described multi-way valve, and the actuator port on multiple work connection valve bodies of described multi-way valve is respectively used to connect corresponding executive component.
10. hydraulic flow shared system according to claim 9, is characterized in that, the oil circuit between the control port and the load-sensitive oil circuit of described multi-way valve of described pump stroking mechanism is also provided with damping.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420604298.2U CN204164074U (en) | 2014-10-17 | 2014-10-17 | Multi-way valve and hydraulic flow shared system |
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| CN201420604298.2U CN204164074U (en) | 2014-10-17 | 2014-10-17 | Multi-way valve and hydraulic flow shared system |
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| CN105402182A (en) * | 2015-12-09 | 2016-03-16 | 广西柳工机械股份有限公司 | Load sensing multi-way directional valve and hydraulic control system of loader |
| CN105570220A (en) * | 2014-10-17 | 2016-05-11 | 徐工集团工程机械股份有限公司 | Multiway valve and hydraulic flow sharing system |
| CN105673603A (en) * | 2016-03-09 | 2016-06-15 | 合肥工业大学 | Hydraulic machine set energy-saving drive system and coordination control method thereof |
| CN106523450A (en) * | 2015-09-15 | 2017-03-22 | 胡斯可国际股份有限公司 | Metered fluid source connection to downstream functions in PCLS systems |
| CN106837907A (en) * | 2017-01-20 | 2017-06-13 | 雷沃重工股份有限公司 | Multiple directional control valve |
| CN109723693A (en) * | 2019-01-15 | 2019-05-07 | 江苏徐工工程机械研究院有限公司 | Load-sensitive multi-way valve and hydraulic system |
| CN113108228A (en) * | 2021-03-18 | 2021-07-13 | 中铁五局集团第一工程有限责任公司 | Oil inlet and return adjusting fluid control device |
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| CN113944663A (en) * | 2021-10-28 | 2022-01-18 | 江苏汇智高端工程机械创新中心有限公司 | Work connection valve body structure, work connection and control method and mining hydraulic excavator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105570220A (en) * | 2014-10-17 | 2016-05-11 | 徐工集团工程机械股份有限公司 | Multiway valve and hydraulic flow sharing system |
| CN106523450A (en) * | 2015-09-15 | 2017-03-22 | 胡斯可国际股份有限公司 | Metered fluid source connection to downstream functions in PCLS systems |
| CN105402182B (en) * | 2015-12-09 | 2017-05-31 | 广西柳工机械股份有限公司 | Load sensing multiple directional control valve and loader hydraulic control system |
| CN105402182A (en) * | 2015-12-09 | 2016-03-16 | 广西柳工机械股份有限公司 | Load sensing multi-way directional valve and hydraulic control system of loader |
| CN107061403A (en) * | 2016-03-09 | 2017-08-18 | 合肥工业大学 | A kind of control method for coordinating of hydraulic pressure unit energy-saving driving system |
| CN105673603A (en) * | 2016-03-09 | 2016-06-15 | 合肥工业大学 | Hydraulic machine set energy-saving drive system and coordination control method thereof |
| CN107061403B (en) * | 2016-03-09 | 2018-06-26 | 合肥工业大学 | A kind of control method for coordinating of hydraulic pressure unit energy-saving driving system |
| CN106837907A (en) * | 2017-01-20 | 2017-06-13 | 雷沃重工股份有限公司 | Multiple directional control valve |
| CN109723693A (en) * | 2019-01-15 | 2019-05-07 | 江苏徐工工程机械研究院有限公司 | Load-sensitive multi-way valve and hydraulic system |
| CN109723693B (en) * | 2019-01-15 | 2023-10-03 | 江苏徐工工程机械研究院有限公司 | Load-sensitive multi-way valve and hydraulic system |
| CN113108228A (en) * | 2021-03-18 | 2021-07-13 | 中铁五局集团第一工程有限责任公司 | Oil inlet and return adjusting fluid control device |
| CN113915185A (en) * | 2021-09-28 | 2022-01-11 | 中联重科股份有限公司 | Load port independent control load sensitive multi-way valve and hydraulic system |
| CN113915185B (en) * | 2021-09-28 | 2023-11-28 | 常德中联重科液压有限公司 | Load port independent control load sensitive multi-way valve and hydraulic system |
| CN113944663A (en) * | 2021-10-28 | 2022-01-18 | 江苏汇智高端工程机械创新中心有限公司 | Work connection valve body structure, work connection and control method and mining hydraulic excavator |
| CN113944663B (en) * | 2021-10-28 | 2024-04-02 | 江苏汇智高端工程机械创新中心有限公司 | Working link valve body structure, working link, control method and mining hydraulic excavator |
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Granted publication date: 20150218 Effective date of abandoning: 20170811 |