CN107940050A - The pressure limiting valve of hydrostatic drive system - Google Patents
The pressure limiting valve of hydrostatic drive system Download PDFInfo
- Publication number
- CN107940050A CN107940050A CN201710941728.8A CN201710941728A CN107940050A CN 107940050 A CN107940050 A CN 107940050A CN 201710941728 A CN201710941728 A CN 201710941728A CN 107940050 A CN107940050 A CN 107940050A
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- China
- Prior art keywords
- pressure
- limiting valve
- pressure limiting
- pipeline
- discharge pipe
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0446—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with an obturating member having at least a component of their opening and closing motion not perpendicular to the closing faces
- F16K17/046—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with an obturating member having at least a component of their opening and closing motion not perpendicular to the closing faces the valve being of the gate valve type or the sliding valve type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/027—Installations or systems with accumulators having accumulator charging devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/024—Pressure relief valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/14—Energy-recuperation means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
- F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0473—Multiple-way safety valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/048—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded combined with other safety valves, or with pressure control devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/04—Control of fluid pressure without auxiliary power
- G05D16/10—Control of fluid pressure without auxiliary power the sensing element being a piston or plunger
- G05D16/103—Control of fluid pressure without auxiliary power the sensing element being a piston or plunger the sensing element placed between the inlet and outlet
- G05D16/106—Sleeve-like sensing elements; Sensing elements surrounded by the flow path
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
- Safety Valves (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The present invention relates to the pressure limiting valve (1) of hydrostatic drive system, the pressure limiting valve is in input side linking to pressure medium pipeline (2) and in outlet side linking to discharge pipe line (3), wherein, which has：Rest position (SP), connection cut-off of the pressure medium pipeline (2) to the discharge pipe line (3) in the rest position；Open position (OP), the pressure medium pipeline (2) is connected with the discharge pipe line (3) in the open position.At least one additional emissions pipeline (ZL is arrived in the pressure limiting valve (1) linking；ZL1, ZL2) on and the pressure limiting valve (1) for each additional emissions pipeline (ZL；ZL1, ZL2) there is a control position (ST；ST1, ST2), the pressure medium pipeline (2) and the additional emissions pipeline (ZL in the control position；ZL1, ZL2) connection.
Description
Technical field
The present invention relates to the pressure limiting valve of hydrostatic drive system, which is connected onto pressure medium pipeline in input side
And in outlet side linking to discharge pipe line, wherein, which has：Rest position, the pressure in the rest position
The connection of medium pipeline to the discharge pipe line is ended；And open position, the pressure medium pipeline is with being somebody's turn to do in the open position
Discharge pipe line connects.
Background technology
Pressure limiting valve is installed in hydrostatic drive system, to limit maximum system pressure, and is therefore prevented hydrostatic
The mechanical failure of the component of drive system.Known pressure limiting valve is configured to following valves, pressure of the valve contrast in drive system
Current system pressure in medium pipeline and opening pressure predetermined on pressure limiting valve, the opening pressure is usually to cut-off position
The spring pre-tightening of the spring for the direction effect put comes predetermined.If the current system pressure acted on to open position direction exceedes
The opening pressure of setting, then pressure limiting valve be loaded into open position, pressure medium pipeline and delivery pipe in the open position
Line connects.The discharge pipe line is usually connected with container.The pressure limiting valve can allow pressure to be situated between so long in the open position
Matter is flowed out in discharge pipe line and thus flowed out to container, until the system pressure in pressure medium pipeline is again less than setting
Opening pressure.
The known pressure limiting valve directly controlled in pressure limiting valve, wherein being acted on towards the direction of rest position and pre-
The given spring for opening pressure is acted directly on the valve body of pressure limiting valve.It is big in flow in the pressure limiting valve so directly controlled
In the case of the big lifting of the system pressure to be ensured occurs by pressure limiting valve, the pressure limiting valve thus directly controlled is used only for
Small flow.In order to which lifting drastically does not occur in the case where flow is big by the system pressure that the pressure limiting valve to be ensured yet,
The pressure limiting valve of known two level, so-called presetting pressure limiting valve.In such presetting pressure limiting valve, (it is configured to small pre- for presetting valve
Adjust pressure limiting valve) detect current system pressure and open main pressure limiting valve when needed.Wanted in such presetting pressure limiting valve
The Flow dependence of the system pressure smaller of guarantee, wherein system pressure lifted only smallly in the case of flow height.
In known pressure limiting valve, the pressure limiting valve has：Rest position, pressure medium pipeline arrives in the rest position
The connection of discharge pipe line is ended；And open position, pressure medium pipeline discharge pipe line connects the (discharge in the open position
Pipeline is connected with container), cause to be throttled relative to the system pressure of container in pressure medium pipeline in the open position.
As long as the system pressure in pressure medium pipeline relative to container is avoided in the open position of pressure limiting valve
Throttling, and pressure medium and then the energy will be truncated in pressure medium reservoir from pressure medium pipeline, then and this can be borrowed
Two are helped to be obtained with the pressure limiting valve being arranged in parallel, wherein, the first pressure limiting valve is opened relative to pressure medium reservoir, and the
Two pressure limiting valves are opened relative to container, thus when the pressure in pressure medium reservoir has reached the opening of the second pressure limiting valve
During pressure, the first pressure limiting valve makes pressure medium throttle from pressure medium pipeline to pressure medium reservoir, and the second pressure limiting valve
Pressure medium is set to throttle from pressure medium pipeline to container.Importantly, the first pressure limiting in the case of two pressure limiting valve parallel connections
Valve (it is opened relative to pressure medium reservoir) is set in the opening pressure lower than the second pressure limiting valve, second pressure limiting
Valve is opened relative to container, to ensure before pressure medium throttles from pressure medium pipeline to container, first by pressure medium
The pressure medium of pipeline loads pressure medium reservoir.But since the different big opening pressure of two pressure limiting valves in parallel makes
System pressure in pressure medium pipeline is kept non-constantly, but from the first pressure limiting valve to during the transition of the second pressure limiting valve
Boost in pressure is produced in pressure medium pipeline.Multiple discrete pressure limiting valves are needed for this, so as to produce on pressure limiting valve more
High structure consumption and the locational requirement of higher.
The content of the invention
The present invention is based on following tasks, there is provided the pressure limiting valve for the type being initially mentioned, the pressure limiting valve can be not upper
Energy regenerating is realized in the case of stating shortcoming.
According to the present invention, thus which solves：Pressure limiting valve is connected onto at least one additional emissions pipeline, and pressure limiting
Valve has a control position for each additional emissions pipeline, in the control position, pressure medium pipeline and additional row
Put pipeline connection.Thus pressure limiting valve according to the present invention is connected in input side linking to pressure medium pipeline and in outlet side
On to discharge pipe line and at least one additional emissions pipeline, so that the pressure limiting valve can make pressure medium pipeline and at least one
A additional emissions pipeline or discharge pipe line connection.Pass through at least one additional emissions pipeline and pressure medium pipeline and phase
Connection of the additional emissions pipeline answered in control position accordingly can realize energy regenerating.Pressure limiting valve according to the present invention by
This is by the function set of multiple pressure limiting valves in parallel into the single pressure limiting valve with small structure consumption and small locational requirement.
Advantageous embodiments according to the present invention, at least one control position are arranged in rest position and open position
Between.Thus, can be before pressure limiting valve be loaded into open position, first at least one in the case where pressure limiting valve is opened
Control realizes energy regenerating in position, and pressure medium is flowed out in discharge pipe line from pressure medium pipeline in the open position.
When expansion scheme according to the present invention, pressure limiting valve is configured to presetting pressure limiting valve and sets presetting valve, especially sets
When putting presetting pressure limiting valve (it controls the opening pressure of pressure limiting valve), particular advantage is drawn.The presetting of pressure limiting valve can realize,
Control position between transition and from control position to open position transition when do not produce pressure step.
Advantageous configuration mode according to the present invention, a pressure medium storage is connected in each additional emissions pipeline uplink
Device.Can be in a straightforward manner at least one by loading a pressure medium reservoir or multiple pressure medium reservoirs
Control obtains energy regenerating in position.
In a kind of embodiment of pressure limiting valve, which is connected with n additional emissions pipeline, the n additional rows
Put pipeline and be connected a pressure medium reservoir respectively, wherein, n >=2, pressure and discharge suitable for pressure medium reservoir
The discharge pressure of pipeline,
P1 ＞ p2 ＞ pn ＞ pA,
And when pressure-control valve makes pressure medium pipeline be connected with discharge pipe line in the open position, pressure limiting valve is successive
By n control position.Thus, in linking into the pressure limiting valve on n additional emissions pipeline, in the situation of pressure limiting valve reaction
Under, since the pressure medium reservoir for being set to maximum pressure p1, one after the other with pressure medium by pressure medium reservoir
Loading, and when all pressure medium reservoirs are loaded, pressure medium pipeline is connected with discharge pipe line.
Advantageous embodiments according to the present invention, pressure limiting valve have the valve that can be arranged with being vertically moved in housing bore
Body, the housing bore are connected with pressure medium pipeline, wherein, it is connected at least one additional emissions pipeline and institute in the housing bore uplink
Discharge pipe line is stated, and in order to control the connection of the housing bore and at least one additional emissions pipeline and the discharge pipe line, should
Valve body respectively have control notch, wherein, it is described control notch in the rest position of the pressure limiting valve respectively have relative to
The positive covering of the interface of at least one additional emissions pipeline and described discharge pipe line, wherein, relative to it is described at least
The covering of one additional emissions pipeline is less than the covering relative to the discharge pipe line.This can be in a straightforward manner by corresponding
Arrangement and thus the position of the control notch in valve body obtains, in the case where pressure limiting valve is opened, reached in pressure limiting valve
Before open position (pressure medium pipeline is connected with discharge pipe line in the open position) first by pressure medium pipeline with it is described
At least one additional emissions pipeline connection.
In a kind of embodiment of pressure limiting valve, in pressure limiting valve linking to n additional emissions pipeline, wherein, n >=2, and
And it is for what the covering was applicable in：
U1 ＜ U2 ＜ Un ＜ UA.
By the design of the covering, in a straightforward manner by controlling relevant position of the notch on valve body to obtain：
In the case that valve body correspondingly vertically moves, in the pressure limiting valve of opening, reach open position before, additional emissions pipeline by
Corresponding control notch is manipulated successively and one after the other.
Brief description of the drawings
The further advantage and details of the present invention are explained in detail by the embodiment shown in schematic figures.Show herein
Go out：
The line map of Fig. 1 pressure limiting valves according to the present invention and
The profilograph of Fig. 2 pressure limiting valves according to the present invention.
Embodiment
Figure 1 illustrates the line map of the pressure limiting valve according to the present invention 1 of hydrostatic drive system.
Pressure limiting valve 1 is in input side linking to pressure medium pipeline 2 and in outlet side linking to discharge pipe line 3.Row
Pipeline 3 is put to be connected with container 4.Pressure limiting valve 1 has rest position SP, and pressure medium pipeline 2 arrives delivery pipe in the rest position
The connection of line 3 is ended.Pressure limiting valve 1 has open position OF, pressure medium pipeline 2 and delivery pipe in the open position in addition
Line 3 connects.
According to the present invention, pressure limiting valve 1 is connected at least one additional emissions pipeline ZL, in the embodiment shown of Fig. 1
In, it is connected on following additional emissions pipeline ZL, in pressure medium reservoir DM linkings to the additional emissions pipeline.
Pressure limiting valve 1 has a control position ST for each additional emissions pipeline ZL, the pressure in the control position
Medium pipeline 2 is connected with additional emissions pipeline ZL.
At least one control position ST is arranged between rest position SP and open position OF.
In addition, in pressure limiting valve 1 according to the present invention, pressure medium pipeline 2 arrives at least one attached in rest position SP
The connection of discharge pipe line ZL is added to be ended.In at least one control position ST, pressure medium pipeline 2 arrives the company of discharge pipe line 3
It is logical to be ended.In the OF of open position, the connection of pressure medium pipeline 2 at least one additional emissions pipeline ZL are opened.
Pressure limiting valve 1 according to the present invention is configured to presetting pressure limiting valve, wherein, presetting valve 10 is provided with, it controls pressure limiting
The opening pressure of valve 1.Presetting valve 10 is configured to presetting pressure limiting valve 11, it is connected in input side with control pipeline 12, the control pipe
Line is connected on the control pressure face 13 acted on to the direction towards rest position SP of pressure limiting valve 1.Pipeline 12 is controlled by branch
Pipe 14 is connected with pressure medium pipeline 2.Presetting pressure limiting valve 11 is connected onto container 4 in outlet side.Presetting pressure limiting valve 11 is by spring
15 are loaded into rest position, and the pressure-loaded being in the open position in control pipeline 12.
Throttling arrangement 16, such as partition plate can be disposed with branched pipe 14, and section is disposed with pipeline 12 is controlled
Flow device 17, such as partition plate.
Pressure limiting valve 1 is in the system pressure loading in pressure medium pipeline 12 on the direction towards open position OF.
For this reason, the control pressure face 18 that the direction towards open position OF of pressure limiting valve 1 acts on is connected with pressure medium pipeline 2.
If the spring by spring 15 that the system pressure p0 being in pressure medium pipeline 2 exceedes presetting pressure limiting valve 11 is pre-
Pressure limiting valve 1, then be first loaded into control position ST, in the control bit by tight predetermined opening pressure from rest position SP
In putting, pressure medium pipeline 2 to additional emissions pipeline ZL is opened, and pressure medium reservoir DM is loaded.As long as pressure is situated between
Matter holder DM be filled and be loaded into pressure p 1 (its higher than in discharge pipe line 3 discharge pressure p A and be less than
System pressure P0), then pressure limiting valve 1 is loaded into the OF of open position from control position ST, the pressure in the open position
Medium pipeline 2 is opened to discharge pipe line 3, so that pressure medium is discharged into container 4 from pressure medium pipeline 2.By presetting
Section, does not produce pressure step, the preconditioning passes through presetting valve in the case of from control position ST to open position OF transition
The 10 pre- stepless opening for being blended into discharge pipe line 3 produces.
Figure 2 illustrates the profilograph of pressure limiting valve 1 according to the present invention.The component same with Fig. 1 is equipped with equally attached
Icon is remembered.
The pressure limiting valve 1 of Fig. 2 is connected on n additional emissions pipeline ZL1, ZL2, they are connected pressure medium storage respectively
On device DM1, DM2, wherein, n is equal to 2.
Pressure limiting valve 1 has the valve body 21 that can be vertically moved in housing bore 20.Pressure is connected in 20 uplink of housing bore to be situated between
Matter pipeline 2, discharge pipe line 3 and additional emissions pipeline ZL1, ZL2.Discharge pipe line 3 and additional emissions pipeline ZL1, ZL2 are by housing
Corresponding transverse holes on hole 20 are formed, and the laterally sky is spaced apart spacing on the longitudinal direction of housing bore 20.
In addition, figure 2 illustrates spring 22, the spring loads valve body 21 on the direction of the rest position SP shown.
Valve body 21, which has, to be used to control the control notch 25 that housing bore 20 is connected with additional emissions pipeline ZL1.Control flume
Mouth 25 is made of the side of valve body 21 in the illustrated embodiment.In addition, valve body 21, which has, is used to control housing bore 20 with adding
The control notch 26 of discharge pipe line ZL2 connections.Notch 26 is controlled in the illustrated embodiment by multiple transverse directions in valve body 21
Hole is formed.It is used to control the control notch 27 that housing bore 20 is connected with discharge pipe line 3 in addition, valve body 21 has.Control notch
27 are made of multiple transverse holes in valve body 21 in the illustrated embodiment.
Control notch 25 has connecing relative to additional emissions pipeline ZL1 in the rest position SP shown of pressure limiting valve 1
The positive covering U1 of mouth.Notch 26 is controlled to have in the rest position SP shown of pressure limiting valve 1 relative to additional emissions pipeline
The positive covering U2 of the interface of ZL2.Notch 27 is controlled to have in the rest position SP shown of pressure limiting valve 1 relative to delivery pipe
The positive covering UA of the interface of line 3.
It is for what the size of covering U1, U2 and UA were applicable in：
U1 ＜ U2 ＜ UA.
Thus the position on controlling notch 25,26,27 is limited, these control notches are first by export pipeline (additional row
Put pipeline ZL1, ZL2, discharge pipe line 3) open.It is suitable for the pressure of pressure medium reservoir DM1, DM2 in the embodiment of fig. 2
The discharge pressure p A's of p1, p2 and discharge pipe line 3 is：
P1 ＞ p2 ＞ pA.
As long as the system pressure p0 being in the embodiment of fig. 2 in pressure medium pipeline 2 exceedes the opening of presetting valve 10
Pressure, then pressure limiting valve 1 is thus first in the first control position ST1 by controlling notch 25 to open pressure medium pipeline 2 and first
The connection of additional emissions pipeline ZL1, so that pressure medium reservoir DM1 is loaded into pressure p 1.Then, pressure limiting valve 1 is
By controlling notch 26 to open pressure medium pipeline 2 and the connection of the second additional emissions pipeline ZL2 in two control position ST2, from
And pressure medium reservoir DM2 is loaded into pressure p 2.Then, pressure limiting valve 1 in the OF of open position by controlling notch 27
The connection of pressure medium pipeline 2 and discharge pipe line 3 is opened, so that pressure medium is flowed out in container 4 from pressure medium pipeline 2.
Thus, pressure limiting valve 1 is in succession by two controls position ST1, ST2, to make pressure medium duct in the OF of open position in pressure limiting valve 1
Before line 2 is connected with discharge pipe line 3, successive on-load pressure media reservoir DM1 and DM2.
Thus pressure limiting valve 1 according to the present invention has the function of multiple pressure limiting valves in parallel, and provide integrated selection
Function.By pressure limiting valve 1 according to the present invention thus, it is possible to it is small in structure consumption and in the case that locational requirement is small recycling from
Pressure medium pipeline 2 is to additional emissions pipeline ZL or multiple additional emissions pipeline ZL1, ZL2 and thus to a pressure medium
Energy (such as in the case where user brakes) in holder DM or multiple pressure medium reservoir DM1, DM2.Work as pressure limiting
When valve 1 is opened for the next stage, boost in pressure is not produced herein in pressure limiting valve 1 according to the present invention, and therefore to being in
System pressure P0 that is in pressure medium pipeline 2 and being limited does not cause reaction.
Claims (7)
1. the pressure limiting valve (1) of hydrostatic drive system, the pressure limiting valve be connected on pressure medium pipeline (2) in input side and
In outlet side linking to discharge pipe line (3), wherein, the pressure limiting valve (1) has：Rest position (SP), in the cut-off position
The connection of pressure medium pipeline described in putting (2) to the discharge pipe line (3) is ended；With open position (OP), beaten described
Pressure medium pipeline described in open position (2) is connected with the discharge pipe line (3), it is characterised in that pressure limiting valve (1) linking
To at least one additional emissions pipeline (ZL；ZL1, ZL2) on and the pressure limiting valve (1) for each additional emissions pipeline (ZL；
ZL1, ZL2) there is a control position (ST；ST1, ST2), pressure medium pipeline (2) and institute described in the control position
State additional emissions pipeline (ZL；ZL1, ZL2) connection.
2. pressure limiting valve according to claim 1, it is characterised in that at least one control position (ST；ST1, ST2) it is arranged in
Between the rest position (SP) and the open position (OF).
3. pressure limiting valve according to claim 1 or 2, it is characterised in that the pressure limiting valve (1) is configured to presetting pressure limiting
Valve, and presetting valve (10) is provided with, presetting pressure limiting valve (11) is especially provided with, the presetting valve controls the pressure limiting valve (1)
Opening pressure.
4. pressure limiting valve according to any one of claim 1 to 3, it is characterised in that in each additional emissions pipeline (ZL；
ZL1, ZL2) uplink is connected to a pressure medium reservoir (DM；DM1、DM2).
5. pressure limiting valve according to any one of claim 1 to 3, it is characterised in that pressure limiting valve (1) linking is to n
Additional emissions pipeline (ZL；ZL1, ZL2) on, the n additional emissions pipeline is connected a pressure medium reservoir respectively
(DM；DM1, DM2) on, wherein, n >=2, and for the pressure medium reservoir (DM；DM1, DM2) pressure (P1, p2)
The applicable of discharge pressure (pA) with the discharge pipe line (3) be：
P1 ＞ p2 ＞ pn ＞ pA,
Also, make the pressure medium pipeline (2) and the delivery pipe in the open position (OF) in the pressure limiting valve (1)
Before line (3) connection, the pressure limiting valve (1) is in succession by n control position (ST；ST1、ST2).
6. pressure limiting valve according to any one of claim 1 to 5, it is characterised in that the pressure limiting valve (1) has can be
The valve body (21) vertically moved in housing bore (20), the housing bore (20) are connected with the pressure medium pipeline (2), wherein,
At least one additional emissions pipeline (ZL is connected in the housing bore (20) uplink；ZL1, ZL2) and the discharge pipe line
(3), and in order to control the housing bore (2) and at least one additional emissions pipeline (ZL；ZL1, ZL2) and the discharge
The connection of pipeline (3), the valve body (21) respectively have control notch (25,26,27), wherein, it is described control notch (25,26,
27) have respectively relative at least one additional emissions pipeline (ZL in the rest position (ST) of the pressure limiting valve (1)；
ZL1, ZL2) and the discharge pipe line (3) interface positive covering (U1, U2, UA), wherein, relative to described at least one attached
Add discharge pipe line (ZL；ZL1, ZL2) the covering (U1, U2) be less than relative to the discharge pipe line (3) the covering
(UA)。
7. pressure limiting valve according to claim 6, it is characterised in that n additional emissions pipeline is arrived in pressure limiting valve (1) linking
(ZL；ZL1, ZL2) on, wherein, n >=2, and for it is described covering (U1, U2, UA) it is applicable be：
U1 ＜ U2 ＜ Un ＜ UA.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016119416.6A DE102016119416A1 (en) | 2016-10-12 | 2016-10-12 | Pressure relief valve of a hydrostatic drive system |
| DE102016119416.6 | 2016-10-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107940050A true CN107940050A (en) | 2018-04-20 |
| CN107940050B CN107940050B (en) | 2022-02-18 |
Family
ID=61695574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710941728.8A Active CN107940050B (en) | 2016-10-12 | 2017-10-11 | Pressure limiting valve of hydrostatic drive system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107940050B (en) |
| DE (1) | DE102016119416A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE102016119416A9 (en) | 2018-05-24 |
| CN107940050B (en) | 2022-02-18 |
| DE102016119416A1 (en) | 2018-04-12 |
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