CN207131657U

CN207131657U - It is a kind of from depressurized system and with from the hydraulic pump of decompression

Info

Publication number: CN207131657U
Application number: CN201721179857.XU
Authority: CN
Inventors: 郑晓刚; 徐月萍
Original assignee: Suzhou Zheng Xiaogang Hydraulic Manufacturing Co Ltd
Current assignee: Wuxi neitian Hydraulic Technology Co.,Ltd.
Priority date: 2017-09-14
Filing date: 2017-09-14
Publication date: 2018-03-23
Anticipated expiration: 2027-09-14

Abstract

The utility model provides a kind of from depressurized system, including valve body, main oil inlet P, guide's oil-out PR, working hole A and oil return inlet T are provided with valve body, pressure-reducing valve and sequence valve are provided with valve body, pressure-reducing valve is provided with the first oil inlet P, the first oil-out A and the first oil-out B, and sequence valve is provided with the first pilot port K；Pressure-reducing valve is additionally provided with spring and drain tap L, drain tap L connects with oil return inlet T, spring can adjust pre compressed magnitude and be arranged on decompression valve core one end can promote pressure-reducing valve valve element switch station, by setting single pressure-reducing valve and using adjustable spring, the oily mode for leading back fuel tank in time is will leak out simultaneously, simplify the environment of the valve element force balance of pressure-reducing valve, enable by adjustable spring easily and accurately adjust the pressure of guide's oil circuit, reduce the throttle point of pipeline, reduce system heat generation, add entirely from the reliability of pressure-reducing valve.

Description

It is a kind of from depressurized system and with from the hydraulic pump of decompression

Technical field

Hydraulic Field is the utility model is related to, more particularly to it is a kind of from depressurized system.

Background technology

Guide's oil circuit is a kind of control oil circuit, and the high-pressure oil passage of executive component can be controlled by low pressure oil way.In liquid In the hydraulic system for pressing excavator, 3.3MPa or so guide's oil circuit pressure is generally required to control each executive component.It is existing Generally also need to set to supply to guide's oil circuit in addition to setting to the high-pressure pump of executive component fuel feeding in excavator hydraulic system The pioneer pump of the low pressure of oil.

Authorization Notice No. CN201680020U utility model patent discloses one kind from pressure-reducing valve, however, this subtract certainly Pressure valve is depressurized by the pressure-reducing valve of two series connection, this structure by way of two throttling valve cores control pilot pressure It is cumbersome, easily cause the failure of spool jam, and the heating of system fluid is more apparent, and system effectiveness is lost because throttle point increases Substantially, the pressure adjustment of guide's oil circuit is inconvenient.

Utility model content

The technical problems to be solved in the utility model is：It is existing cumbersome from structure of relief pressure valve, easily cause spool jam Failure, because throttle point increases, the heating of system fluid is more apparent, and system effectiveness loss is obvious, and the pressure adjustment of guide's oil circuit Inconvenience, the utility model provide one kind from depressurized system to solve the above problems.

Technical scheme is used by the utility model solves its technical problem：It is a kind of from depressurized system, including valve body, institute State the main oil inlet P that connection pressure oil-source is provided with valve body, the guide's oil-out PR for connecting guide's oil circuit, connection executive component Working hole A and logical fuel tank oil return inlet T, be provided with pressure-reducing valve and sequence valve in the valve body, the pressure-reducing valve is provided with the One oil inlet P, the first oil-out A and the first oil-out B, the sequence valve are provided with the first pilot port K；In initial position, institute State the right working position access of pressure-reducing valve, its described first oil inlet P and the first oil-out A are connected, the first pilot port K with The first oil-out A connections, the first oil-out B connect with the oil return inlet T；The valve element station of the pressure-reducing valve is by the right side First oil inlet P to the first oil-out A passage described in when switching to the left is gradually reduced, throttled until completely closing；It is described to subtract Pressure valve is additionally provided with spring and drain tap L, and the drain tap L connects with the oil return inlet T, and the spring can adjust pre compressed magnitude And being arranged on one end of the decompression valve core can promote the valve element of the pressure-reducing valve to switch station.

Further：The outer end of the spring is provided with the regulating bolt that can hold out against and loosen the spring.

Further：Choke valve is provided between the first pilot port K and the first oil-out A.

It is a kind of have be provided with from the hydraulic pump of decompression, including hydraulic pressure main pump, the hydraulic pressure main pump it is above-mentioned from Pressure-reducing valve, the outlet of the hydraulic pressure main pump connect with the main oil inlet P.

Further：On the valve body, mounting interface is provided with the main oil inlet P, passes through the mounting interface The valve body is fixedly mounted on the hydraulic pressure main pump.

Further：It is described have from the hydraulic pump of decompression be additionally provided with the first overflow valve and the second overflow valve, institute State the outlet of hydraulic pressure main pump described in the inlet communication of the first overflow valve, the outlet fuel tank of first overflow valve, described First oil-out A, the outlet fuel tank of second overflow valve described in the inlet communication of two overflow valves.

The beneficial effects of the utility model are that the utility model one kind sets single pressure-reducing valve from depressurized system and use can Spring is adjusted, while will leak out the oily mode for leading back fuel tank in time, simplifies the environment of the valve element force balance of pressure-reducing valve, avoids valve The stuck failure of core, and enable and pass through adjustable spring easily and accurately adjust the pressure of guide's oil circuit, reduce pipe The throttle point on road, reduces system heat generation, reduces the power loss of system, adds entirely from the reliability of pressure-reducing valve.

Brief description of the drawings

The utility model is further illustrated with reference to the accompanying drawings and examples.

Fig. 1 is a kind of systematic schematic diagram from depressurized system of the utility model；

Fig. 2 is the Hydraulic Elements principle schematic of pressure-reducing valve；

Fig. 3 is the systematic schematic diagram with the hydraulic pump from decompression.

1, valve body in figure, 2, main oil inlet P, 3, guide's oil-out PR, 4, working hole A, 5, oil return inlet T, 6, pressure-reducing valve, 7, Sequence valve, the 8, first oil inlet P, the 9, first oil-out A, the 10, first oil-out B, the 11, first pilot port K, 12, spring, 13, Drain tap L, 14, choke valve, the 15, first overflow valve, the 16, second overflow valve.

Embodiment

Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng The embodiment for examining accompanying drawing description is exemplary, is only used for explaining the utility model, and it is not intended that to of the present utility model Limitation.On the contrary, embodiment of the present utility model includes falling into owning in the range of the spirit and intension of attached claims Change, modification and equivalent.

In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " axle To ", " radial direction ", the orientation of the instruction such as " circumference " or position relationship be based on orientation shown in the drawings or position relationship, be only for It is easy to the description present invention and simplifies description, rather than instruction or implies that signified device or element there must be specific side Position, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.

In addition, term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicating or implying relatively important Property., it is necessary to which explanation, unless otherwise clearly defined and limited, term " connected ", " connects in description of the present utility model Connect " it should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or it is integrally connected；It can be machine Tool connects or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary.For this area For those of ordinary skill, concrete meaning of the above-mentioned term in the utility model can be understood with concrete condition.In addition, in this reality With in new description, unless otherwise indicated, " multiple " are meant that two or more.

Any process or method described otherwise above description in flow chart or herein is construed as, and represents to include Module, fragment or the portion of the code of the executable instruction of one or more the step of being used to realize specific logical function or process Point, and the scope of preferred embodiment of the present utility model includes other realization, wherein can not press shown or discuss Order, including according to involved function by it is basic simultaneously in the way of or in the opposite order, carry out perform function, this should be by this The embodiment person of ordinary skill in the field of utility model is understood.

First embodiment：

As shown in figure 1, the utility model provides one kind is provided with connection from depressurized system, including valve body 1, valve body 1 The main oil inlet P 2 of pressure oil-source, the guide's oil-out PR3 for connecting guide's oil circuit, the working hole A4 for connecting executive component and logical oil The oil return inlet T 5 of case, pressure-reducing valve 6 and sequence valve 7 is provided with valve body 1, as shown in Fig. 2 pressure-reducing valve 6 is provided with the first oil inlet P8, the first oil-out A9 and the first oil-out B10, sequence valve 7 are provided with the first pilot port K11；In initial position, pressure-reducing valve 6 Right working position access, its first oil inlet P 8 and first oil-out A9 connect, the first pilot port K11 and the first oil-out A9 company Logical, the first oil-out B10 connects with oil return inlet T 5；When the valve element station of pressure-reducing valve 6 switches from right to left the first oil inlet P 8 to First oil-out A9 passage is gradually reduced, throttled until completely closing；Pressure-reducing valve 6 is additionally provided with spring 12 and drain tap L13, Drain tap L13 connects with oil return inlet T 5, and spring 12 can adjust pre compressed magnitude and be arranged on one end of the valve element of pressure-reducing valve 6 and can promote The valve element switching station of pressure-reducing valve 6.

It can be arranged on from pressure-reducing valve at the hydraulic pump outlet of hydraulic system, pressure oil-source can both provide executive component institute The pressure oil of the high pressure needed, while the pressure oil of the low pressure required for hydraulic system can also be supplied to.

The set location and position consistency of the prior art of pressure-reducing valve 6 and sequence valve 7 in valve body 1, i.e. sequence valve 7 are set Put between main oil inlet P 2 and working hole A4, the first oil inlet P 8 connects with main oil inlet P 2, the first oil-out A9 and guide Oil-out PR3 is connected, and the first oil-out B10 connects with oil return inlet T 5.

When main oil inlet P 2 flows into without hydraulic oil, sequence valve 7 is off, main oil inlet P 2 and working hole Passage between A4 is cut off, and now pressure-reducing valve 6 is in right position access state, and the oil-out A9's of the first oil inlet P 8 to the first is logical Road is opened；As the autonomous oil inlet P 2 of hydraulic oil flows into, pressure rise at main oil inlet P 2, the pressure at guide's oil-out PR3 Power also gradually rises, the first oil-out A9 pressure rise to setting value.First oil-out A9 pressure promotes the valve of pressure-reducing valve 6 The left position of core is gradually accessed, and is moved with the valve element of pressure-reducing valve 6, the oil-out A9 of the first oil inlet P 8 to the first passage is gradually reduced And throttling is produced, the pressure value of such first oil inlet P 8 will be above the pressure value at the first oil-out A9, with main oil inlet Pressure rise at P2, after the first oil-out A9 pressure rise to setting value, the leftmost bit access of pressure-reducing valve 6, the first oil inlet Pressure at P8 to the first oil-out A9 passage closing, the first oil-out A9 and guide's oil-out PR3 will be maintained at setting Value.

When exporting hydraulic fluid port PR3 and the first oil-out A9 pressure reduction in the ban, the valve element of pressure-reducing valve 6 moves, and right position is gradual Access, the oil-out A9 of the first oil inlet P 8 to the first passage continues to open, until guide's oil-out PR3 and the first oil-out A9 Pressure recover untill setting value.

Spring 12 is arranged on valve element one end of pressure-reducing valve 6, and valve element can be promoted to move, drain tap L13 and oil return opening T5 is connected, and the Leakage Energy of such pressure-reducing valve 6 can flow back to fuel tank in time, the stress at the valve element both ends of such pressure-reducing valve 6 and The mobile status of valve element by the pretightning force of spring 12 and being controlled with joint efforts for the first oil-out A9 pressure, will work as operation completely When personnel need to adjust setting guide's oil-out PR3 pressure value, it is only necessary to adjust the pre compressed magnitude of spring 12.With it is existing Technology is compared, such a configuration reduce the valve element of pressure-reducing valve 6 by force factor so that operating personnel can pass through the pretension of spring 12 Power directly controls the pressure value at the first oil-out A9, and structure is simpler, and reduces the throttle point of oil circuit, reduces The temperature rise of hydraulic oil, improve the efficiency of whole system.And the valve element of such structure pressure-reducing valve 6 is not easy to block, system work( The loss of rate is smaller, and efficiency is higher.

The outer end of spring 12 is provided with the regulating bolt that can be held out against with pull-off spring 12, by regulating bolt come to spring 12 pre compressed magnitudes carried out are adjusted with this to adjust the pre-compression force of spring 12, and this mode may be referred to setting for overflow valve The structure of constant-pressure adjustment.

Choke valve 14, the first pilot port K11 control pressure are provided between first pilot port K11 and the first oil-out A9 The pressure being generally less than between the first oil-out A9, certain throttling is produced at this choke valve 14 so that first goes out Hydraulic fluid port A9 pressure value is higher than the pressure value at the first pilot port K11, and choke valve 14 can filter some first oil-outs Pressure oscillation at A9 so that the pressure at the first pilot port K11 is more stable, the main oil-feed after opening of such sequence valve 7 The process of mouth P2 to working hole A4 discharge pressures oil also will more be stablized, and ensure that executive component can work normal table.

Second embodiment：

It is a kind of have set from the hydraulic pump of decompression, including hydraulic pressure main pump 14, hydraulic pressure main pump 14 it is real just like first Apply being connected from pressure-reducing valve, the outlet of hydraulic pressure main pump 14 with main oil inlet P 2 in example.This mode can be used in hydraulic crawler excavator Hydraulic system in, in this way when, whole hydraulic system may not necessarily be separately provided pioneer pump, and its guide's oil pressure comes from From pressure-reducing valve, the pressure oil output of hydraulic pressure main pump 14 produces pilot pressure oil, guide's oil-out PR3 supply controls after pressure-reducing valve 6 Magnetic valve, PPC valves and counterbalance valve processed etc., working hole A4 connects execution structure, and oil return inlet T 5 leads to oil return.Can be with by such mode Cancel pioneer pump, simplify the mechanism of hydraulic system, the i.e. adjustable pilot pressure value of the pre compressed magnitude by adjusting spring 12, subtract Lack system heat generation, save the energy and manufacturing cost.

On valve body 1, mounting interface is provided with main oil inlet P 2, valve body 1 is fixedly mounted on by liquid by mounting interface Press on main pump 14.It is that will be connected from pressure-reducing valve with main control valve in the prior art, this mode is limited by main control valve, Adaptability is very poor.The mode that the utility model mounting means is fixedly connected using valve body 1 with hydraulic pressure main pump 14, so can be with More neatly hydraulic pump is applied in all kinds of hydraulic systems, directly provides the pressure oil-source with two kinds of pressure selections, Adaptability greatly improves.

With being additionally provided with the first overflow valve 15 and the second overflow valve 16, the first overflow valve 15 from the hydraulic pump of decompression Inlet communication hydraulic pressure main pump 14 outlet, the outlet fuel tank of the first overflow valve 15, the inlet communication of the second overflow valve 16 First oil-out A9, the outlet fuel tank of the second overflow valve 16.

First overflow valve 15 can prevent that the outlet pressure of hydraulic pressure main pump 14 is too high, make as the safety valve of hydraulic pressure main pump 14 Into the damage of Hydraulic Elements, the second overflow valve 16 can prevent pressure oscillation in pilot line as the safety valve of guide's oil circuit Or the pressure regulation of pressure-reducing valve 6 it is abnormal when caused pilot line hypertonia, the Hydraulic Elements in pilot line can be protected.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment or example of the present utility model.In this manual, to the schematic table of the term State and be not necessarily referring to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be Combined in an appropriate manner in any one or more embodiments or example.

Using it is above-mentioned according to desirable embodiment of the present utility model as enlightenment, pass through above-mentioned description, related work people Member can carry out various changes and amendments in the range of without departing from this item utility model technological thought completely.This item is real The content being not limited to new technical scope on specification, it is necessary to which its technology is determined according to right Property scope.

Claims

It is 1. a kind of from depressurized system, including valve body（1）, the valve body（1）On be provided with connection pressure oil-source main oil inlet P （2）, connection guide's oil circuit guide's oil-out PR（3）, connection executive component working hole A（4）With the oil return inlet T of logical fuel tank （5）, the valve body（1）Inside it is provided with pressure-reducing valve（6）And sequence valve（7）, the pressure-reducing valve（6）It is provided with the first oil inlet P （8）, the first oil-out A（9）With the first oil-out B（10）, the sequence valve（7）It is provided with the first pilot port K（11）；Initial Position, the pressure-reducing valve（6）Right working position access, its described first oil inlet P（8）With the first oil-out A（9）Connect, The first pilot port K（11）With the first oil-out A（9）Connection, the first oil-out B（10）With the oil return inlet T （5）Connection；The pressure-reducing valve（6）Valve element station first oil inlet P described in when switching from right to left（8）To the first oil-out A （9）Passage be gradually reduced, throttle until completely close；It is characterized in that：The pressure-reducing valve（6）It is additionally provided with spring（12）With Drain tap L（13）, the drain tap L（13）With the oil return inlet T（5）Connection, the spring（12）Adjustable pre compressed magnitude is simultaneously And it is arranged on the pressure-reducing valve（6）One end of valve element can promote the pressure-reducing valve（6）Valve element switching station.
It is 2. as claimed in claim 1 a kind of from depressurized system, it is characterised in that：The spring（12）Be provided with can be with for outer end Hold out against and loosen the spring（12）Regulating bolt.
It is 3. as claimed in claim 2 a kind of from depressurized system, it is characterised in that：The first pilot port K（11）With described One oil-out A（9）Between be provided with choke valve（14）.
4. a kind of hydraulic pump having from decompression, including hydraulic pressure main pump（14）, it is characterised in that：The hydraulic pressure main pump（14） On be provided with as claimed in claim 1 from pressure-reducing valve, the hydraulic pressure main pump（14）Outlet and the main oil inlet P（2）Even It is logical.
A kind of 5. hydraulic pump having from decompression as claimed in claim 4, it is characterised in that：In the valve body（1）On, The main oil inlet P（2）Place is provided with mounting interface, by the mounting interface by the valve body（1）It is fixedly mounted on described Hydraulic pressure main pump（14）On.
A kind of 6. hydraulic pump having from decompression as claimed in claim 5, it is characterised in that：It is described to have from decompression work( The hydraulic pump of energy is additionally provided with the first overflow valve（15）With the second overflow valve（16）, first overflow valve（15）Inlet communication The hydraulic pressure main pump（14）Outlet, first overflow valve（15）Outlet fuel tank, second overflow valve（16）'s First oil-out A described in inlet communication（9）, second overflow valve（16）Outlet fuel tank.