CN205331090U - Combination valve, proportional valve, hydraulic system and vehicle - Google Patents
Combination valve, proportional valve, hydraulic system and vehicle Download PDFInfo
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- CN205331090U CN205331090U CN201521029995.0U CN201521029995U CN205331090U CN 205331090 U CN205331090 U CN 205331090U CN 201521029995 U CN201521029995 U CN 201521029995U CN 205331090 U CN205331090 U CN 205331090U
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Abstract
The utility model discloses a combination valve, proportional valve, hydraulic system and vehicle, the combination valve includes: first hydraulic fluid port and second hydraulic fluid port, first check valve, the oil inlet of first check valve with the first hydraulic fluid port intercommunication of combination valve, the oil -out of first check valve with the second hydraulic fluid port intercommunication of combination valve, the choke valve, the choke valve is connected first hydraulic fluid port with between the second hydraulic fluid port, the second check valve, the oil inlet of second check valve with the oil -out intercommunication of first check valve, the oil -out of second check valve with the oil inlet intercommunication of first check valve, and the oil inlet of second check valve with pressure differential between the oil -out of second check valve is greater than during the threshold value of second check valve the second check valve is opened. The utility model discloses a combination valve can effectively reduce pressure and vibrate, and permanent load feedback signal realizes quick pressure release, and the simple structure of combination valve, easily makes.
Description
Technical field
This utility model belongs to technical field of hydraulic pressure, in particular to a kind of combination valve, is provided with the proportioning valve of this combination valve, is provided with the hydraulic system of this proportioning valve and is provided with the vehicle of this proportioning valve。
Background technology
In the hydraulic system of load-sensitive, existing technology is usually a kind of banked direction control valves of offer, with when height load frequent switches, needs according to hydraulic system are set up rapidly and removal feedback pressure or oil circuit pressure, phenomenon is not mated with the delay wait of hydraulic system function of eliminating the effects of the act and flow, but above-mentioned technology lacks the device of steady load feedback signal between load and feedback hydraulic fluid port, the load feedback signal of instability can be transmitted when system pressure instability, cause oil pump suffer temporary impact or frequently change flow export, affect oil pump life and system stability, there is room for improvement。
Utility model content
One of technical problem that this utility model is intended to solve in correlation technique at least to a certain extent。For this, a purpose of the present utility model is in that to propose a kind of combination valve that can realize quick pressure releasing。
Another purpose of the present utility model is in that to propose a kind of proportioning valve with combinations thereof valve。
Another purpose of the present utility model is in that to propose a kind of hydraulic system with aforementioned proportion valve。
Further object of the present utility model is in that to propose a kind of vehicle with aforementioned proportion valve。
Combination valve according to this utility model first aspect includes: the first hydraulic fluid port and the second hydraulic fluid port；First check valve, the oil-in of described first check valve connects with the first hydraulic fluid port of described combination valve, and the oil-out of described first check valve connects with the second hydraulic fluid port of described combination valve；Choke valve, described choke valve is connected between described first hydraulic fluid port and described second hydraulic fluid port；Second check valve, the oil-in of described second check valve connects with the oil-out of described first check valve, the oil-out of described second check valve connects with the oil-in of described first check valve, and the pressure reduction between the oil-in and the oil-out of described second check valve of described second check valve more than the threshold value of described second check valve time described in the second check valve open。
Combination valve according to this utility model first aspect, it is possible to effectively reduce pressure oscillations, steady load feedback signal, it is achieved quick pressure releasing, other parts in hydraulic system can be played good protective effect and the simple in construction of combination valve, it is easy to manufacture。
It addition, can also have following additional technical characteristic according to this utility model combinations of the above valve:
Alternatively, described combination valve includes main valve body and valve seat, and described valve seat has valve pocket, and described main valve body is located in described valve pocket, and limits described choke valve between described main valve body and described valve pocket；Described main valve body includes the body portion of described first check valve and the body portion of described second check valve。
Preferably, described choke valve is screw thread choke valve。
Alternatively, the body portion of described first check valve is provided with the first chamber and first flow, and described first chamber connects with described second hydraulic fluid port, and described first flow connects with described first hydraulic fluid port, and described first flow is connected with described first chamber；The spool of described first check valve is movably arranged in described first chamber；The elastic component of described first check valve is folded between the diapire of described first chamber and the spool of described first check valve, so that described first check valve is from described first flow to described first chamber one-way conduction。
Alternatively, the body portion of described second check valve is provided with the second chamber and the second runner, and described second chamber connects with described first hydraulic fluid port, and described second runner connects with described second hydraulic fluid port, and described second runner is connected with described second chamber；The spool of described second check valve is movably arranged in described second chamber；The elastic component of described second check valve is folded between the diapire of described second chamber and the spool of described second check valve, so that described second check valve is from described second runner to described second chamber one-way conduction。
Alternatively, being provided with: first passage in described main valve body, described first flow is connected by described first passage with described second chamber；Second channel, described second runner is connected by described second channel with described first chamber。
Alternatively, described first passage extends radially through described main valve body so that described choke valve is connected with described first hydraulic fluid port by described first passage along described main valve body；Described second channel extends radially through described main valve body so that described first chamber is connected with described second hydraulic fluid port by described second channel along described main valve body。
Alternatively, jointly limiting annular gap between one end and the internal perisporium of described valve pocket of described main valve body, described annular gap constitutes described second hydraulic fluid port。
Alternatively, described combination valve also includes: restricting element, and described restricting element is located between the oil-in of described first check valve and described first hydraulic fluid port。
Preferably, described restricting element is configured to the throttle orifice on described main valve body。
Proportioning valve according to this utility model second aspect includes: balanced valve, and described balanced valve is for distributing hydraulic pressure for load end；Combination valve, described combination valve is any one described combination valve of first aspect, and described first hydraulic fluid port is suitable to connect with described load end, and described second hydraulic fluid port connects with described balanced valve。
Described proportioning valve is identical relative to prior art have the advantage that with combinations of the above valve, does not repeat them here。
Hydraulic system according to this utility model third aspect, is arranged just like the proportioning valve described in second aspect。
Described hydraulic system is identical relative to prior art have the advantage that with above-mentioned proportioning valve, does not repeat them here。
Vehicle according to this utility model fourth aspect, is arranged just like the proportioning valve described in second aspect。
Described vehicle is identical relative to prior art have the advantage that with above-mentioned proportioning valve, does not repeat them here。
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage are from conjunction with will be apparent from easy to understand the accompanying drawings below description to embodiment, wherein:
Fig. 1 is the structural representation of the combination valve according to this utility model embodiment；
Fig. 2 is the structural representation of the proportioning valve according to this utility model embodiment；
Fig. 3 is the partial enlarged drawing at A place in Fig. 2；
Fig. 4 is the structural representation of the hydraulic system according to this utility model embodiment。
Accompanying drawing labelling:
Hydraulic system 1, proportioning valve 10,
Combination valve 100, the first hydraulic fluid port 101, the second hydraulic fluid port 102,
First check valve 110, the first chamber 111, first flow 112, the spool 113 of the first check valve, the elastic component 114 of the first check valve, the first plug 115,
Second check valve 120, the second chamber 121, the second runner 122, the spool 123 of the second check valve, the elastic component 124 of the second check valve, the second plug 125,
Choke valve 130,
Main valve body 140, first passage 141, second channel 142, throttle orifice 143, the first external thread section 144, the second external thread section 145,
Valve seat 150,
Balanced valve 200。
Detailed description of the invention
Being described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of same or like function from start to finish。The embodiment described below with reference to accompanying drawing is illustrative of, it is intended to be used for explaining this utility model, and it is not intended that to restriction of the present utility model。
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, it is for only for ease of description this utility model and simplifies description, rather than the device of instruction or hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model。
Additionally, term " first ", " second " are only for descriptive purposes, and it is not intended that indicate or imply relative importance or the implicit quantity indicating indicated technical characteristic。Thus, define " first ", the feature of " second " can express or implicitly include at least one this feature。In description of the present utility model, " multiple " are meant that at least two, for instance two, three etc., unless otherwise expressly limited specifically。
In this utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, for instance, it is possible to it is fixing connection, it is also possible to be removably connect, or integral；Can be mechanically connected, it is possible to be joined directly together, it is also possible to be indirectly connected to by intermediary, it is possible to be connection or the interaction relationship of two elements of two element internals, unless otherwise clear and definite restriction。For the ordinary skill in the art, it is possible to understand above-mentioned term concrete meaning in this utility model as the case may be。
In this utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact。And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of fisrt feature level height higher than second feature。Fisrt feature second feature " under ", " lower section " and " below " can be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second feature。
Describe this utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail。
Combination valve 100 according to this utility model embodiment is described in detail with reference first to Fig. 1-Fig. 4, as Figure 1-Figure 4, combination valve 100 has the first hydraulic fluid port 101 and the second hydraulic fluid port 102, and combination valve 100 includes the first check valve the 110, second check valve 120 and choke valve 130。
Wherein, the oil-in of the first check valve 110 connects with the first hydraulic fluid port 101 of combination valve 100, the oil-out of the first check valve 110 connects with the second hydraulic fluid port 102 of combination valve 100, choke valve 130 is connected between the first hydraulic fluid port 101 and the second hydraulic fluid port 102, the oil-in of the second check valve 120 and the oil-out connection of the first check valve 110, the oil-out of the second check valve 120 and the oil-in connection of the first check valve 110, and the pressure reduction between the oil-in and the oil-out of the second check valve 120 of the second check valve 120 more than the threshold value of the second check valve 120 time the second check valve 120 open, it is understandable that, the pressure of the oil-in of the second check valve 120 approximates the pressure of the second hydraulic fluid port 102, the pressure of the oil-out of the second check valve 120 approximates the pressure of the first hydraulic fluid port 101。
In other words, first check valve the 110, second check valve 120 and choke valve 130 are arranged in parallel, first hydraulic fluid port 101 is suitable to be connected with load end, and the LS mouth that the second hydraulic fluid port 102 is suitable to balanced valve 200 is connected, and the hydraulic oil of load end flows into combination valve 100 by the first hydraulic fluid port 101, and flow to the second hydraulic fluid port 102 through the first check valve 110, flowing out combination valve 100 again, when the pressure oscillation of load end, the first check valve 110 can be closed, make pressure balance, reduce concussion。
When load end unloads, the pressure at the first hydraulic fluid port 101 place is zero, and the LS mouth of balanced valve 200 needs quick pressure releasing, and load end unloading inevitably results in the pressure oscillations of hydraulic system 1。
When pressure reduction between the oil-in and the oil-out of the second check valve 120 of the second check valve 120 that pressure oscillations causes is not up to the threshold value of the second check valve 120, when namely pressure oscillations is less, second check valve 120 is not turned on, hydraulic oil passes sequentially through the second hydraulic fluid port 102, choke valve the 130, first hydraulic fluid port 101, eventually passes back to fuel tank。
When pressure reduction between the oil-in and the oil-out of the second check valve 120 of the second check valve 120 that pressure oscillations causes is more than the threshold value of the second check valve 120, when namely pressure oscillations is bigger, now the second check valve 120 is opened, hydraulic oil passes sequentially through second hydraulic fluid port the 102, second check valve the 120, first hydraulic fluid port 101, eventually pass back to fuel tank, play the effect of quick pressure releasing。
Combination valve 100 according to this utility model embodiment; by arranging the first check valve the 110, second check valve 120 and choke valve 130 that aforesaid way connects; can effectively reduce pressure oscillations; steady load feedback signal; realize quick pressure releasing; other parts in hydraulic system 1 can be played good protective effect and the simple in construction of combination valve 100, it is easy to manufacture。
In preferred embodiments more of the present utility model, as it is shown on figure 3, combination valve 100 can include main valve body 140 and valve seat 150, valve seat 150 can have valve pocket, main valve body 140 can be located in valve pocket, and can limit choke valve 130 between main valve body 140 and valve pocket。
Preferably, choke valve 130 can be screw thread choke valve。Specifically, the internal perisporium of valve pocket can be provided with female thread, the periphery wall of main valve body 140 can be provided with the first external thread section 144, the threaded tip portion of the first external thread section 144 can be smoothed, the thread root of the first external thread section 144 is for threadeding with female thread, and namely the first external thread section 144 can limit screw thread choke valve jointly with the female thread on the internal perisporium of valve pocket。
Certainly, in other optional embodiments of the present utility model, the part corresponding with the first external thread section 144 of the female thread on the internal perisporium of valve pocket can be smoothed jointly to limit screw thread choke valve with the first external thread section 144。
Preferably, the periphery wall of main valve body 140 is also provided with the second external thread section 145, second external thread section 145 can with the first external thread section 144 axially spaced layout along main valve body 140, second external thread section 145 can with another part threaded engagement of the female thread on the internal perisporium of valve pocket so that main valve body 140 is arranged on valve seat 150。
Preferably, main valve body 140 can include the body portion of the first check valve 110 and the body portion of the second check valve 120。It is to say, first check valve the 110, second check valve 120 and choke valve 130 can integrated be arranged, thus, the compact conformation of combination valve 100, volume is less。
As shown in Figure 3, the body portion of the first check valve 110 can be provided with the first chamber 111 and first flow 112, first chamber 111 can connect with the second hydraulic fluid port 102, first flow 112 can connect with the first hydraulic fluid port 101, first flow 112 can be connected with the first chamber 111, the spool 113 of the first check valve 110 is movably arranged in the first chamber 111, the elastic component 114 of the first check valve 110 can be folded between the diapire of the first chamber 111 and the spool 113 of the first check valve 110, so that the first check valve 110 is from first flow the 112 to the first chamber 111 one-way conduction。
Preferably, as it is shown on figure 3, the first chamber 111 and first flow 112 can equal axially extending along main valve body 140。The diapire of the first chamber 111 is it is so structured that the first plug 115, one end of first chamber 111 can towards the open at one end of main valve body 140, first plug 115 can seal the open end of the first chamber 111, and the elastic component 114 of the first check valve 110 can be folded between the first plug 115 and the spool 113 of the first check valve 110。
Alternatively, the elastic component 114 of the first check valve 110 can be spring。
As shown in Figure 3, the body portion of the second check valve 120 can be provided with the second chamber 121 and the second runner 122, second chamber 121 can connect with the first hydraulic fluid port 101, second runner 122 can connect with the second hydraulic fluid port 102, second runner 122 can be connected with the second chamber 121, the spool 123 of the second check valve 120 is movably arranged in the second chamber 121, the elastic component 124 of the second check valve 120 can be folded between the diapire of the second chamber 121 and the spool 123 of the second check valve 120, so that the second check valve 120 is from second runner the 122 to the second chamber 121 one-way conduction。
Preferably, as it is shown on figure 3, the second chamber 121 and the second runner 122 can equal axially extending along main valve body 140, and the second chamber 121 and the second runner 122 can arrange along the spaced radial of main valve body 140 with first flow 112 relative to the first chamber 111。The diapire of the second chamber 121 is it is so structured that the second plug 125, one end of second chamber 121 can be opened wide towards the other end of main valve body 140, second plug 125 can seal the open end of the second chamber 121, and the elastic component 124 of the second check valve 120 can be folded between the second plug 125 and the spool 123 of the second check valve 120。
It is understandable that, when the second check valve 120 has been assembled, the threshold value positive correlation of the pretightning force of the elastic component 124 of the second check valve 120 and the second check valve 120, say, that, the pretightning force of the elastic component 124 of the second check valve 120 is more big, and the threshold value of the second check valve 120 is more big。
Alternatively, the threshold value of the second check valve 120 can be 1.5MPa-2.5MPa, and specifically, the threshold value of the second check valve 120 can be 2MPa。
Alternatively, the elastic component 124 of the second check valve 120 can be spring。
Preferably, as it is shown on figure 3, can be provided with first passage 141 and second channel 142 in main valve body 140, first flow 112 can pass through first passage 141 with the second chamber 121 and connect, and the second runner 122 can pass through second channel 142 with the first chamber 111 and connect。
Further, as shown in Figure 3, first passage 141 can extend radially through main valve body 140 along main valve body 140, choke valve 130 can pass through first passage 141 and connect with the first hydraulic fluid port 101, and second channel 142 can extend radially through main valve body 140 so that the first chamber 111 passes through second channel 142 and connects with the second hydraulic fluid port 102 along main valve body 140。
Specifically, as it is shown on figure 3, can jointly limit annular gap between one end of main valve body 140 and the internal perisporium of valve pocket, annular gap may be constructed the second hydraulic fluid port 102。
In some preferred embodiments, as shown in Figure 3, main valve body 140 is it is so structured that cylinder, main valve body 140 insert valve pocket one end diameter can less than the diameter of valve pocket, jointly to limit the second hydraulic fluid port 102 being configured to annular gap between one end of main valve body 140 and the internal perisporium of valve pocket。
Preferably, as it is shown on figure 3, annular gap and the first thread segment 144 can along the axially proximate settings of main valve body 140, in order to choke valve 130 connects with the second hydraulic fluid port 102。
As it is shown on figure 3, combination valve 100 can also include restricting element, restricting element can be located between the oil-in of the first check valve 110 and the first hydraulic fluid port 101。
Thus, restricting element can control the flow of the hydraulic oil of circulation combination valve 100, and when the flow of hydraulic oil increases, restricting element can play the effect of the pressure stablizing the second hydraulic fluid port 102。
Specifically, as it is shown on figure 3, restricting element is it is so structured that throttle orifice 143 on main valve body 140, the aperture of throttle orifice 143 is less, with limited flow。Thus, the simple in construction of restricting element。
Preferably, as it is shown on figure 3, throttle orifice 143 can be located between the second chamber 121 and the first hydraulic fluid port 101。
Alternatively, throttle orifice 143 can radially extending along main valve body 140, and the second thread segment 145 can be divided into two sub-thread segments by throttle orifice 143。
The operation principle of combination valve 100 according to this utility model embodiment is described below。
The hydraulic oil of load end flows into combination valve 100 by the first hydraulic fluid port 101, and sequentially pass through throttle orifice the 143, second chamber 121, first passage 141, first flow the 112, first chamber 111, second channel 142, finally flow out combination valve 100 from the second hydraulic fluid port 102, in the process, throttle orifice 143 plays the effect of the flow controlling hydraulic oil, and seldom section hydraulic oil can flow into choke valve 130 by first passage 141, and flow into the second hydraulic fluid port 102 from choke valve 130, it is to say, overwhelming majority hydraulic oil can pass through the first check valve 110 flows to the second hydraulic fluid port 102。
When load end unloads, the pressure at the first hydraulic fluid port 101 place is zero, and the LS mouth of balanced valve 200 needs quick pressure releasing, and load end unloading inevitably results in the pressure oscillations of hydraulic system 1。
When pressure reduction between the oil-in and the oil-out of the second check valve 120 of the second check valve 120 that pressure oscillations causes is not up to the threshold value of the second check valve 120, when namely pressure oscillations is less, now the second check valve 120 is not turned on, hydraulic oil passes sequentially through the second hydraulic fluid port 102, choke valve 130, first passage the 141, second chamber 121, throttle orifice the 143, first hydraulic fluid port 101, eventually passes back to fuel tank。It is to say, when pressure oscillations is less, combination valve 100 is by choke valve 130 pressure release。
When pressure reduction between the oil-in and the oil-out of the second check valve 120 of the second check valve 120 that pressure oscillations causes is more than the threshold value of the second check valve 120, when namely pressure oscillations is bigger, now the spool 123 of the second check valve 120 is backed down, hydraulic oil passes sequentially through the second hydraulic fluid port 102, second channel the 142, second runner the 122, second chamber 121, throttle orifice the 143, first hydraulic fluid port 101, eventually pass back to fuel tank, play the effect of quick pressure releasing。It is to say, when pressure oscillations is bigger, combination valve 100, by opening the second check valve 120, plays the effect of quick pressure releasing。
Combination valve 100 according to this utility model embodiment; the flow of hydraulic oil (such as feeding back to the hydraulic oil of the LS mouth of balanced valve 200) can be efficiently controlled; reduce pressure oscillations; steady load feedback signal; realize quick pressure releasing, other parts in hydraulic system 1 can be played good protective effect and the simple in construction of combination valve 100; compact, it is easy to manufacture。
Proportioning valve 10 according to this utility model embodiment is described below。
As shown in Figure 1-Figure 3, proportioning valve 10 according to this utility model embodiment includes balanced valve 200 and combination valve 100, balanced valve 200 is for distributing hydraulic pressure for load end, any one combination valve 100 that combination valve 100 describes for above-described embodiment, and first hydraulic fluid port 101 be suitable to connect with load end, the second hydraulic fluid port 102 connects with balanced valve 200。
It should be noted that, pressure signal according to load end feedback, the valve core opening degree of balanced valve 200 can be adjusted with stressing conditions, and unnecessary flow returns to fuel tank by balanced valve 200, then controlling system pressure is load end pressure and balanced valve end spring pressure sum。Combination valve 100 can limit load end feedback oil circuit and lead to the flow of balanced valve 200, controls valve and returns to pressure and the flowed fluctuation of feedback oil circuit caused during middle position, makes feedback signal steady。
Proportioning valve 10 according to this utility model embodiment; by arranging combinations thereof valve 100; pressure oscillations can be efficiently reduced; steady load feedback signal; realize quick pressure releasing, other parts in hydraulic system 1 can be played good protective effect and the simple in construction of proportioning valve 10; compact, it is easy to manufacture。
Alternatively, balanced valve 200 can for three-way flow regulating valve。
Alternatively, as shown in Figures 2 and 3, the body portion of proportioning valve 10 can as the valve seat 150 of combination valve 100, say, that combination valve 100 can be plugged on proportioning valve 10, thus, and the simple in construction of proportioning valve 10, and easy to connect。
Hydraulic system 1 according to this utility model embodiment is described below。
As Figure 1-Figure 4, the hydraulic system 1 of this utility model embodiment is provided with any one proportioning valve 10 that above-described embodiment describes。
Hydraulic system 1 according to this utility model embodiment, pressure oscillations is little, and load feedback signal is stable, can realize quick pressure releasing when load end unloads, and the parts (such as hydraulic pump) of hydraulic system 1 are not easily susceptible to the impact of pressure oscillations。
Vehicle according to this utility model embodiment is described below。
As Figure 1-Figure 4, the vehicle of this utility model embodiment is provided with any one proportioning valve 10 that above-described embodiment describes。
Vehicle according to this utility model embodiment, working stability, hydraulic system 1 pressure oscillations of vehicle is little, and pressure release speed is fast, and other parts (such as hydraulic pump) of vehicle are not easily susceptible to the impact of pressure oscillations。
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example describe are contained at least one embodiment of the present utility model or example。In this manual, the schematic representation of above-mentioned term is necessarily directed to identical embodiment or example。And, the specific features of description, structure, material or feature can combine in one or more embodiments in office or example in an appropriate manner。Additionally, when not conflicting, the feature of the different embodiments described in this specification or example and different embodiment or example can be carried out combining and combining by those skilled in the art。
Although above it has been shown and described that embodiment of the present utility model, it is understandable that, above-described embodiment is illustrative of, it is not intended that to restriction of the present utility model, above-described embodiment can be changed in scope of the present utility model, revises, replace and modification by those of ordinary skill in the art。
Claims (13)
1. a combination valve, it is characterised in that including:
First hydraulic fluid port and the second hydraulic fluid port；
First check valve, the oil-in of described first check valve connects with the first hydraulic fluid port of described combination valve, and the oil-out of described first check valve connects with the second hydraulic fluid port of described combination valve；
Choke valve, described choke valve is connected between described first hydraulic fluid port and described second hydraulic fluid port；
Second check valve, the oil-in of described second check valve connects with the oil-out of described first check valve, the oil-out of described second check valve connects with the oil-in of described first check valve, and the pressure reduction between the oil-in and the oil-out of described second check valve of described second check valve more than the threshold value of described second check valve time described in the second check valve open。
2. combination valve according to claim 1, it is characterised in that include main valve body and valve seat, described valve seat has valve pocket, and described main valve body is located in described valve pocket, and limits described choke valve between described main valve body and described valve pocket；
Described main valve body includes the body portion of described first check valve and the body portion of described second check valve。
3. combination valve according to claim 2, it is characterised in that described choke valve is screw thread choke valve。
4. combination valve according to claim 2, it is characterized in that, the body portion of described first check valve is provided with the first chamber and first flow, described first chamber connects with described second hydraulic fluid port, described first flow connects with described first hydraulic fluid port, and described first flow is connected with described first chamber；
The spool of described first check valve is movably arranged in described first chamber；
The elastic component of described first check valve is folded between the diapire of described first chamber and the spool of described first check valve, so that described first check valve is from described first flow to described first chamber one-way conduction。
5. combination valve according to claim 4, it is characterized in that, the body portion of described second check valve is provided with the second chamber and the second runner, described second chamber connects with described first hydraulic fluid port, described second runner connects with described second hydraulic fluid port, and described second runner is connected with described second chamber；
The spool of described second check valve is movably arranged in described second chamber；
The elastic component of described second check valve is folded between the diapire of described second chamber and the spool of described second check valve, so that described second check valve is from described second runner to described second chamber one-way conduction。
6. combination valve according to claim 5, it is characterised in that be provided with in described main valve body:
First passage, described first flow is connected by described first passage with described second chamber；
Second channel, described second runner is connected by described second channel with described first chamber。
7. combination valve according to claim 6, it is characterised in that described first passage extends radially through described main valve body so that described choke valve is connected with described first hydraulic fluid port by described first passage along described main valve body；Described second channel extends radially through described main valve body so that described first chamber is connected with described second hydraulic fluid port by described second channel along described main valve body。
8. combination valve according to claim 2, it is characterised in that jointly limit annular gap between one end and the internal perisporium of described valve pocket of described main valve body, described annular gap constitutes described second hydraulic fluid port。
9. combination valve according to claim 2, it is characterised in that also include: restricting element, described restricting element is located between the oil-in of described first check valve and described first hydraulic fluid port。
10. combination valve according to claim 2, it is characterised in that described restricting element is configured to the throttle orifice on described main valve body。
11. a proportioning valve, it is characterised in that including:
Balanced valve, described balanced valve is for distributing hydraulic pressure for load end；
Combination valve, described combination valve is the combination valve according to any one of claim 1-10, and described first hydraulic fluid port is suitable to connect with described load end, and described second hydraulic fluid port connects with described balanced valve。
12. a hydraulic system, it is characterised in that be provided with proportioning valve as claimed in claim 11。
13. a vehicle, it is characterised in that be provided with proportioning valve as claimed in claim 11。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521029995.0U CN205331090U (en) | 2015-12-11 | 2015-12-11 | Combination valve, proportional valve, hydraulic system and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521029995.0U CN205331090U (en) | 2015-12-11 | 2015-12-11 | Combination valve, proportional valve, hydraulic system and vehicle |
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| CN205331090U true CN205331090U (en) | 2016-06-22 |
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| US10539542B2 (en) | 2017-07-26 | 2020-01-21 | Honeywell International Inc. | Pressure transient normalization within a gas detector |
| CN111692266A (en) * | 2020-06-11 | 2020-09-22 | 中国第一汽车股份有限公司 | Electro-hydraulic proportional valve and continuous damping control shock absorber |
| WO2024139050A1 (en) * | 2022-12-27 | 2024-07-04 | 比亚迪股份有限公司 | Hydraulic combination valve, hydraulic system for transmission, and vehicle |
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2015
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10539542B2 (en) | 2017-07-26 | 2020-01-21 | Honeywell International Inc. | Pressure transient normalization within a gas detector |
| CN111692266A (en) * | 2020-06-11 | 2020-09-22 | 中国第一汽车股份有限公司 | Electro-hydraulic proportional valve and continuous damping control shock absorber |
| CN111692266B (en) * | 2020-06-11 | 2021-12-03 | 中国第一汽车股份有限公司 | Electro-hydraulic proportional valve and continuous damping control shock absorber |
| WO2024139050A1 (en) * | 2022-12-27 | 2024-07-04 | 比亚迪股份有限公司 | Hydraulic combination valve, hydraulic system for transmission, and vehicle |
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