CN214661171U - Reversing valve rod, reversing valve, hydraulic rotary valve, hydraulic system and operating machine - Google Patents
Reversing valve rod, reversing valve, hydraulic rotary valve, hydraulic system and operating machine Download PDFInfo
- Publication number
- CN214661171U CN214661171U CN202120551636.0U CN202120551636U CN214661171U CN 214661171 U CN214661171 U CN 214661171U CN 202120551636 U CN202120551636 U CN 202120551636U CN 214661171 U CN214661171 U CN 214661171U
- Authority
- CN
- China
- Prior art keywords
- oil
- shaft shoulder
- reversing valve
- port
- shoulder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Multiple-Way Valves (AREA)
Abstract
The utility model provides a reversing valve rod, a reversing valve, a hydraulic rotary valve, a hydraulic system and an operating machine, wherein a middle position shaft shoulder is arranged in the middle of a rod body of the reversing valve rod, and a first oil through groove, a first shaft shoulder, a second oil through groove and a second shaft shoulder are sequentially arranged from the middle position shaft shoulder to the two ends of the rod body; the oil inlet is formed in the side wall of the second shaft shoulder, the oil outlet is formed in the second oil through groove, and the oil outlet is communicated with the oil inlet; the oil guide structure is constructed on the side wall of the first shaft shoulder, the first end of the oil guide structure is close to the middle part of the first shaft shoulder, and the second end of the oil guide structure is formed at one end, far away from the middle shaft shoulder, of the first shaft shoulder; the flow restriction is configured on a sidewall of the medial shoulder, the flow restriction extending from a position at or near a middle of the medial shoulder toward at least one end of the medial shoulder. The utility model discloses when carrying out the switching-over valve accuse of hydraulic pressure oil circuit, ensured the stability of hydraulic system oil return, realized the gentle control to hydraulic motor gyration action.
Description
Technical Field
The utility model relates to a hydrovalve technical field especially relates to a switching-over valve rod, switching-over valve, hydraulic pressure rotary valve, hydraulic system and operation machinery.
Background
In the reversing valve hydraulic system, different oil supply directions are switched by changing the position of a reversing valve rod. If in the PTAB oil path, the working oil port A, B is connected to the oil chamber of the hydraulic motor, and when the oil supply port P supplies oil to the working oil port a, the working oil port B returns oil through the first oil return port T, and the hydraulic motor rotates in one direction; on the contrary, when the oil supply port P supplies oil to the working oil port B, the working oil port a is communicated with the first oil return port T to return oil, and the hydraulic motor rotates in the other direction.
The existing reversing valve rod generally comprises a middle position shaft shoulder, a first oil through groove, a first shaft shoulder, a second oil through groove and a second shaft shoulder which are sequentially arranged along a rod body of the reversing valve rod. The first oil through groove, the first shaft shoulder, the second oil through groove and the second shaft shoulder are symmetrically arranged on two sides of the middle shaft shoulder, a first oil supply port is formed in the first shaft shoulder, and an oil outlet communicated with the first oil supply port is formed in the second oil through groove. Although the reversing valve rod can well realize the reversing valve control function of the reversing valve, the oil return control of the reversing valve is inconvenient, so that the rotation action of the hydraulic motor is not smooth enough.
SUMMERY OF THE UTILITY MODEL
The utility model provides a switching-over valve rod, switching-over valve, hydraulic pressure rotary valve, hydraulic system and operation machinery for solve current switching-over valve rod and be not convenient for carry out the oil return control of switching-over valve, lead to hydraulic motor's the not gentle problem of gyration action inadequately.
The utility model provides a reversing valve rod, wherein a middle position shaft shoulder is arranged in the middle of a rod body of the reversing valve rod, and a first oil through groove, a first shaft shoulder, a second oil through groove and a second shaft shoulder are sequentially arranged from the middle position shaft shoulder to the two ends of the rod body; further comprising: the oil inlet, the oil outlet, the oil guide structure and the throttling structure; the oil inlet is formed in the side wall of the second shaft shoulder, the oil outlet is formed in the second oil through groove, and the oil outlet is communicated with the oil inlet; the oil guide structure is constructed on the side wall of the first shaft shoulder, the first end of the oil guide structure is close to the middle part of the first shaft shoulder, and the second end of the oil guide structure is formed at one end, far away from the middle shaft shoulder, of the first shaft shoulder; the throttling structure is configured on a side wall of the medial shoulder, and the throttling structure extends from a position at or near the middle of the medial shoulder to at least one end of the medial shoulder.
According to the utility model provides a pair of reversing valve rod, throttling structure includes balanced oil groove, balanced oil groove is followed the axial extension of reversing valve rod, the first end of balanced oil groove form in the one end of meso position shaft shoulder, the second end form in the other end of meso position shaft shoulder.
According to the utility model provides a reversing valve rod, the throttling structure comprises a first oil guide groove and a second oil guide groove; the first oil guide groove and the second oil guide groove extend along the axial direction of the reversing valve rod; the first end of the first oil guide groove is formed in the middle part close to the middle shaft shoulder, and the second end of the first oil guide groove is formed at one end of the middle shaft shoulder; the first end of the second oil guide groove is formed in the middle part close to the middle shaft shoulder, and the second end of the second oil guide groove is formed at the other end of the middle shaft shoulder.
According to the reversing valve rod provided by the utility model, the first oil guide groove, the balance oil groove and the second oil guide groove are all provided with a plurality of grooves, and the first oil guide groove, the balance oil groove and the second oil guide groove are sequentially arranged on the side wall of the middle position shaft shoulder along the circumferential direction; the circumferential distance between the first oil guide groove and the balance oil groove is equal to the circumferential distance between the balance oil groove and the second oil guide groove; and/or the first end of the first oil guide groove and the second end of the second oil guide groove are located on the first side of the radial plane where the middle part of the middle shaft shoulder is located, and the second end of the first oil guide groove and the first end of the second oil guide groove are located on the second side of the radial plane.
According to the reversing valve rod provided by the utility model, a one-way valve is arranged in the rod body of the reversing valve rod and connected between the oil inlet and the oil outlet so as to control hydraulic oil to flow from the oil inlet to the oil outlet; and/or the oil inlet is provided with a plurality of oil inlets and is formed on the side wall of the second shaft shoulder along the circumferential direction.
According to the utility model provides a reversing valve rod, lead the axial extension of oil structure along the reversing valve rod, lead oil structure and include oil level or oil groove, lead the radial distance of the second end of oil structure relative to the axis of reversing valve rod to be less than lead the radial distance of the first end of oil structure relative to the axis of reversing valve rod; and/or the oil guide structure is provided with a plurality of oil guide structures and is formed on the side wall of the first shaft shoulder along the circumferential direction.
The utility model also provides a reversing valve rod, the middle part of the rod body of the reversing valve rod is provided with a meso position shaft shoulder, and the meso position shaft shoulder is sequentially provided with a first oil through groove, a first shaft shoulder, a second oil through groove and a second shaft shoulder from the meso position shaft shoulder to the two ends of the rod body; further comprising: the oil inlet, the oil outlet, the oil guide structure and the throttling structure; the oil inlet is formed in the side wall of the second shaft shoulder, the oil outlet is formed in the second oil through groove, and the oil outlet is communicated with the oil inlet; the oil inlet comprises a first oil inlet and a second oil inlet, and the diameter of the first oil inlet is smaller than that of the second oil inlet; in the axial direction of the reversing valve rod, the distance from the first oil inlet to the middle shaft shoulder is greater than the distance from the second oil inlet to the middle shaft shoulder; the oil guide structure is constructed on the side wall of the first shaft shoulder, the first end of the oil guide structure is close to the middle part of the first shaft shoulder, and the second end of the oil guide structure is formed at one end, far away from the middle shaft shoulder, of the first shaft shoulder; the throttling structure is configured on a side wall of the medial shoulder, and the throttling structure extends from a position at or near the middle of the medial shoulder to at least one end of the medial shoulder.
The utility model also provides a reversing valve, the power distribution valve comprises a valve body, the valve body is internal to be constructed with the valve rod chamber, install as above in the valve rod intracavity slidable reversing valve rod.
According to the utility model provides a reversing valve, a first oil supply port, a first oil return port, a first working oil port and a second working oil port are also constructed on the valve body; the valve rod cavity is respectively communicated with the first oil supply port, the first oil return port, the first working oil port and the second working oil port, and the first working oil port and the second working oil port are respectively used for being communicated with a cavity of a hydraulic actuating element; and under the condition that the reversing valve rod is positioned at the middle position, the first oil supply port is communicated with the first oil return port, and the first oil return port is respectively communicated with the first working oil port and the second working oil port.
According to the reversing valve provided by the utility model, the valve rod cavity is provided with a middle position cavity body section positioned in the middle part, and a first sealing section, a first cavity body section, a second sealing section, a second cavity body section, a third sealing section, a third cavity body section and a fourth sealing section which are sequentially communicated are arranged from the middle position cavity body section to the two ends of the valve rod cavity; the first oil supply port is communicated with the middle cavity section and the third cavity section respectively; the first oil return port is communicated with the first cavity section; the first working oil port is communicated with the second cavity section on one side of the middle cavity section, and the second working oil port is communicated with the second cavity section on the other side of the middle cavity section; under the circumstances that the switching-over valve rod is in the meso position, place in the meso position shaft shoulder meso position cavity section, first shaft shoulder is kept away from the one end of meso position shaft shoulder with the sealed cooperation of second, first shaft shoulder is close to the one end of meso position shaft shoulder is located in the first cavity section, the first end of leading oily structure on the switching-over valve rod with first cavity section intercommunication, lead oily structure the second end with second cavity section intercommunication, the second shaft shoulder simultaneously with the third sealed section reaches fourth sealed section contact seal, first fuel feeding port with third cavity section intercommunication, the oil-out with second cavity section intercommunication.
The utility model also provides a hydraulic rotary valve, which comprises a buffer reversing valve and the reversing valve; the buffer reversing valve comprises a second oil supply port, a second oil return port, a third working oil port and a fourth working oil port, the second oil supply port is communicated with the first working oil port on the reversing valve, the second oil return port is communicated with the second working oil port on the reversing valve, and the third working oil port and the fourth working oil port are used for being communicated with a cavity of a hydraulic execution element; and under the condition that a valve rod of the buffer reversing valve is positioned at a middle position, an oil path between the second oil supply port and the third working oil port is cut off, and an oil path between the second oil return port and the fourth working oil port is cut off.
The present invention also provides a hydraulic system comprising a reversing valve as described above, or a hydraulic rotary valve as described above.
The present invention also provides a work machine comprising a reversing valve as described above, or a hydraulic rotary valve as described above, or a hydraulic system as described above.
The utility model provides a pair of reversing valve rod, the switching-over valve, the hydraulic pressure rotary valve, hydraulic system and operation machinery, through setting up first fuel feeding mouth in the second shoulder of reversing valve rod, and set up the oil-out in second oil groove, then when the switching-over valve of switching-over valve is controlled, be convenient for supply oil mouth through the switching-over valve to the first fuel feeding mouth at switching-over valve rod both ends and the position at the meso position shoulder place and supply oil simultaneously, when returning oil through leading the oil structure, based on the throttle effect of leading the oil structure, both can balanced meso position shoulder both sides first lead to the oil pressure in the oil groove, steerable switching-over valve is from the oil mass of supplying oil mouth to water return mouth between again, the stability of hydraulic system oil return has been ensured, the gentle control to hydraulic motor gyration action has been realized.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art descriptions, and obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a reversing valve rod provided by the present invention;
fig. 2 is a schematic structural diagram of the reversing valve when the reversing valve rod provided by the present invention is located at the middle position in the reversing valve;
fig. 3 is a schematic structural view of the reversing valve provided by the present invention, when the first oil supply port P is separated from the first working oil port a by moving the reversing valve rod rightward from the neutral position by a first preset distance;
fig. 4 is a schematic structural view of the reversing valve rod moving rightwards from the middle position by a second preset distance when the first working oil port B is separated from the first oil return port T and the check valve from the first oil supply port P to the first working oil port B is opened;
fig. 5 is a schematic structural view of the reversing valve provided by the present invention, when the first oil supply port P is separated from the first oil return port T on the left side of the middle shoulder by moving the reversing valve rod rightward from the middle position by a third preset distance;
fig. 6 is a schematic structural view of the reversing valve provided by the present invention when the distance of the reversing valve rod moving rightwards from the middle position is greater than a fourth preset distance;
fig. 7 is a schematic structural diagram of a valve body of the reversing valve provided by the present invention;
fig. 8 is a schematic structural view of a hydraulic rotary valve provided by the present invention;
reference numerals:
100: a diverter valve; 200: a buffer reversing valve; 1: a reversing valve rod;
2: a valve stem cavity; 3: a valve body; 10: a middle position shaft shoulder;
11: a first oil through groove; 12: a first shoulder; 13: a second oil through groove;
14: a second shoulder; 101: balancing the oil groove; 102: a first oil guide groove;
103: a second oil guide groove; 121: an oil guiding structure; 131: an oil outlet;
141: an oil inlet; 20: a median cavity section; 21: a first seal section;
22: a first cavity section; 23: a second seal section; 24: a second cavity section;
25: a third seal section; 26: a third cavity section; 27: a fourth seal section;
1410: a first oil inlet; 1411: a second oil inlet.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
A reversing valve stem, a reversing valve, a hydraulic rotary valve, a hydraulic system, and a work machine according to the present invention will be described with reference to fig. 1 to 8.
As shown in fig. 1, the present embodiment provides a reversing valve rod, a middle position shoulder 10, a first oil through groove 11, a first shoulder 12, a second oil through groove 13, and a second shoulder 14 are sequentially disposed on a rod body of the reversing valve rod 1, and the first oil through groove 11, the first shoulder 12, the second oil through groove 13, and the second shoulder 14 are symmetrically disposed on two sides of the middle position shoulder 10.
Meanwhile, the reversing valve rod 1 shown in the embodiment is further provided with an oil inlet 141, an oil outlet 131, an oil guide structure 121 and a throttling structure; the oil inlet 141 is formed on the side wall of the second shaft shoulder 14, the oil outlet 131 is formed on the second oil through groove 13, and the oil outlet 131 is communicated with the oil inlet 141; the diameter of the oil outlet 131 is larger than that of the oil inlet 141, so that the oil pressure rise of the hydraulic oil after the hydraulic oil is conveyed from the oil inlet 141 to the oil outlet 131 can be effectively avoided.
Further, the oil guiding structure 121 shown in the present embodiment is configured on the side wall of the first shoulder 12, a first end of the oil guiding structure 121 is formed near the middle of the first shoulder 12, and a second end is formed at an end of the first shoulder 12 far from the middle shoulder 10. As shown in fig. 1, in order to facilitate the oil guiding structure 121 to better guide the hydraulic oil to flow along the side wall of the first shoulder 12 for oil return of the reversing valve, the oil guiding structure 121 shown in this embodiment extends along the axial direction of the reversing valve rod 1, the oil guiding structure 121 includes an oil passing surface or an oil groove, and a radial distance of the second end of the oil guiding structure 121 relative to the central axis of the reversing valve rod 1 is smaller than a radial distance of the first end of the oil guiding structure 121 relative to the central axis of the reversing valve rod 1.
The oil passing surface shown in this embodiment may be an inclined surface, a curved surface, or a combined surface of an inclined surface and a curved surface, and is not particularly limited herein.
Under the condition that it is the oil groove to lead oily structure 121, the notch degree of depth that can set up the oil groove is along leading the first end to the second end gradual increase of oily structure 121 to the increase is to the water conservancy diversion effect of hydraulic oil. For example: the oil guiding structure 121 shown in this embodiment may be specifically configured as a chute. As shown in fig. 2 to 6, in the process of moving the reversing valve rod to the right, the oil guide structure 121 may enable the first working oil port a and the first oil return port T on the reversing valve to start to be connected, and the oil guide gap between the first working oil port a and the first oil return port T is gradually increased, so that the oil return effect of the reversing valve may be greatly enhanced.
Meanwhile, in order to enhance the oil return effect of the direction valve 100, the oil guide structure 121 shown in the present embodiment is provided in plurality and is configured on the side wall of the first shoulder 12 in the circumferential direction. The oil guide structures 121 may be three, four or five, and are circumferentially and uniformly distributed on the sidewall of the first shoulder 12.
Further, the throttling structure shown in the present embodiment is configured on the side wall of the neutral shoulder 10, and the throttling structure extends from the middle of the neutral shoulder 10 or a position near the middle of the neutral shoulder 10 to at least one end of the neutral shoulder 10.
The throttling structure shown in this embodiment may be capable of realizing multiple oil grooves for throttling, where at least two ends of one oil groove correspondingly extend to two ends of the middle position shoulder 10 in the axial direction of the reversing valve rod 1, so as to realize the mutual communication between the first oil through grooves 11 on two sides of the middle position shoulder 10, one end of at least one oil groove is located in the middle of the middle position shoulder 10, and the other end extends to one end of the middle position shoulder 10 in the axial direction of the reversing valve rod 1, so that when the reversing valve rod 1 moves to a left station or a right station in the reversing valve 100, the oil amount guided from the oil supply port to the oil return port of the reversing valve 100 may be controlled by the oil groove.
The oil grooves may be arranged on the side wall of the middle shoulder 10 in a curved manner, or may be arranged linearly along the axial direction of the reversing valve rod 1, which is not specifically limited herein.
As shown in fig. 1, in one embodiment, the throttling structure includes a balance oil groove 101, the balance oil groove 101 extends along the axial direction of the reversing valve rod 1, a first end of the balance oil groove 101 is formed at one end of the middle shoulder 10, and a second end is formed at the other end of the middle shoulder 10.
As shown in fig. 1, in another embodiment, the throttling structure includes a first oil guiding groove 102 and a second oil guiding groove 103; the first oil guide groove 102 and the second oil guide groove 103 extend along the axial direction of the reversing valve rod 1; a first end of the first oil guide groove 102 is formed in the middle of the middle shaft shoulder 10, and a second end is formed at one end of the middle shaft shoulder 10; a first end of the second oil guide groove 103 is formed at the middle of the center shoulder 10, and a second end is formed at the other end of the center shoulder 10.
It should be noted that, in the embodiment, a plurality of first oil guide grooves, a plurality of balance oil grooves and a plurality of second oil guide grooves are provided, and the first oil guide grooves, the balance oil grooves and the second oil guide grooves are sequentially arranged along the circumferential direction on the side wall of the middle shaft shoulder; the first circumference interval of leading between oil groove and the balanced oil groove equals the circumference interval of leading between the oil groove of balanced oil groove and second, so can ensure that first oil groove, balanced oil groove and the second of leading is evenly arranged along circumference on the lateral wall of meso position shaft shoulder.
Wherein, the circumference interval between first oil groove and the balanced oil groove specifically means on the lateral wall of well position shaft shoulder, from first oil groove to balanced oil groove between the length of the pitch arc along circumference. Correspondingly, the circumferential distance between the balance oil groove and the second oil guide groove specifically refers to the length of an arc line between the balance oil groove and the second oil guide groove along the circumferential direction on the side wall of the middle shaft shoulder.
Meanwhile, the first end of the first oil guide groove and the second end of the second oil guide groove shown in this embodiment are located on the first side of the radial plane where the middle part of the middle shaft shoulder is located, and the second end of the first oil guide groove and the first end of the second oil guide groove are located on the second side of the radial plane.
The radial plane specifically refers to a plane perpendicular to the axial direction of the middle position shaft shoulder, and the first side and the second side are oppositely arranged on two sides of the radial plane along the axial direction of the middle position shaft shoulder.
As can be seen from the above, in the present embodiment, the first oil supply port is disposed on the second shoulder 14 of the reversing valve rod 1, and the oil outlet 131 is disposed on the second oil through groove 13, so that oil can be simultaneously supplied to the first oil supply ports at the two ends of the reversing valve rod 1 and the middle position shoulder 10 at the middle portion through the oil supply ports of the reversing valve 100 when the reversing valve of the reversing valve 100 is controlled, and when oil is returned through the oil guide structure 121, based on the throttling effect of the oil guide structure 121, the oil pressure in the first oil through grooves 11 at the two sides of the middle position shoulder 10 can be balanced, the amount of oil guided by the reversing valve 100 from the oil supply ports to the oil return ports can be controlled, the stability of oil return of the hydraulic system is ensured, and the smooth control of the rotation motion of the hydraulic motor is realized.
The throttling effect of the throttling structure in the process that the reversing valve rod 1 moves to the right station in the reversing valve 100 is described in detail with reference to fig. 2 to 6.
As shown in fig. 2 and 7, the direction valve 100 includes a valve body 3, and a stem chamber 2 is formed in the valve body 3. The valve rod cavity 2 comprises a middle cavity section 20, a first sealing section 21, a first cavity section 22, a second sealing section 23, a second cavity section 24, a third sealing section 25, a third cavity section 26 and a fourth sealing section 27 which are communicated in sequence; the first sealing section 21, the first cavity section 22, the second sealing section 23, the second cavity section 24, the third sealing section 25, the third cavity section 26 and the fourth sealing section 27 are symmetrically arranged on two sides of the middle cavity section 20.
As shown in fig. 2, the neutral shoulder 10 is built into the neutral chamber section 20 with the reversing valve stem 1 in the neutral position, where the axial symmetry plane of the reversing valve stem 1 coincides with the axial symmetry plane of the stem chamber 2 in the reversing valve 100 in an orientation perpendicular to the axial direction of the reversing valve stem 1. Meanwhile, one end of the first shaft shoulder 12, which is far away from the middle shaft shoulder 10, is in sealing fit with the second sealing section 23, one end of the first shaft shoulder 12, which is close to the middle shaft shoulder 10, is located in the first cavity section 22, the first end of the oil guiding structure 121 on the reversing valve rod 1 is communicated with the first cavity section 22, the second end of the oil guiding structure 121 is communicated with the second cavity section 24, the second shaft shoulder 14 is simultaneously in contact sealing with the third sealing section 25 and the fourth sealing section 27, the first oil supply port is communicated with the third cavity section 26, and the oil outlet 131 is communicated with the second cavity section 24.
As shown in fig. 2, when the reversing valve rod 1 is in the neutral position, a distance from one end of the oil inlet 141, which is far away from the neutral shoulder 10, to one end of the second cavity section 24, which is close to the neutral cavity section 20, is a first preset distance, and the first preset distance may be specifically set to 0.5 mm; the distance that the first end of the oil guiding structure 121 extends out of the first cavity section 22 and is far away from one end of the middle cavity section 20 is a second preset distance, and the second preset distance can be specifically set to be 1.0 mm; the distance between the end of the first shoulder 12 close to the median shoulder 10 and the first cavity section 22 remote from the median cavity section 20 is a third predetermined distance, which may be specifically set to 2.1 mm.
As shown in fig. 3, when the reversing valve rod 1 moves rightwards from the middle position by a first preset distance, the first oil supply port P is isolated from the first working oil port a based on the sealing effect of the third sealing section 25 on the oil inlet 141, at this time, the first oil supply port P is conducted with the first oil return port T, the first oil return port T is respectively conducted with the first working oil port a and the first working oil port B, and the first oil supply port P is isolated from the first working oil port B.
As shown in fig. 4, when the reversing valve rod 1 moves from the first preset distance to the second preset distance, the first working oil port B is separated from the first oil return port T based on the sealing effect of the second sealing section 23 on the oil guide structure 121, and the check valve from the first oil supply port P to the first working oil port B is opened.
As shown in fig. 5, when the reversing valve rod 1 moves from the second preset distance to the third preset distance continuously, one end of the first shoulder 12 located on the left side, which is close to the middle shaft shoulder 10, starts to be in sealing fit with one end of the first sealing section 21, which is far from the middle cavity section 20, so that the first oil supply port P is isolated from the first oil return port T on the left side of the middle shaft shoulder 10, hydraulic oil of the first oil supply port P starts to enter the first oil through groove 11 on the right side of the middle shaft shoulder 10 through the second oil guide groove 103, the first oil supply port P starts to build pressure, and as the reversing valve rod 1 moves continuously, the second oil guide groove 103 gradually decreases an oil guide gap, that is, enters a P/T speed regulation stage.
As shown in fig. 6 and 8, in the process that the reversing valve rod 1 moves rightwards from the third preset distance to a position larger than the fourth preset distance and continues to move rightwards to the right station, the oil path gap between the first oil supply port P and the first oil return port T continues to be reduced, so that the hydraulic motor gradually accelerates, and the smooth control of the rotary motion of the hydraulic motor is realized. Wherein, the fourth preset distance may be specifically 2.5 mm.
Preferably, in the present embodiment, a check valve is disposed in the rod body of the reversing valve rod 1, and the check valve is connected between the oil inlet 141 and the oil outlet 131 to control the hydraulic oil to flow from the oil inlet 141 to the oil outlet 131. Wherein the one-way valve is not specifically illustrated in fig. 1.
Here, through setting up the check valve, when switching-over valve rod 1 station moves to the right, hydraulic oil can only flow to second work hydraulic fluid port B from first oil feed mouth P, simultaneously, when switching-over valve rod 1 station moves to the left, hydraulic oil can only flow to first work hydraulic fluid port A from first oil feed mouth P to the directional flow control to hydraulic oil has been realized. Because the rotation of the arm support is controlled by the hydraulic motor on the operation machine, when the operation machine is in a gradient environment, the directional control of the hydraulic motor can be carried out based on the reversing valve 100, and the arm support is prevented from slipping down the slope.
Preferably, the present embodiment further provides a reversing valve rod, which is different from the reversing valve rod shown in the above embodiments in that the oil inlet 141 on the reversing valve rod includes a first oil inlet 1410 and a second oil inlet 1411, and the diameter of the first oil inlet 1410 is smaller than that of the second oil inlet 1411; in the axial direction of the reversing valve rod, the distance from the first oil inlet 1410 to the middle shoulder 10 is larger than the distance from the second oil inlet 1411 to the middle shoulder 10. Thus, based on the improvement of the oil inlet 141, the oil guide gap between the oil inlet 141 and the oil outlet 131 is gradually increased in the process that the reversing valve rod moves to the right station.
As shown in fig. 2, the present embodiment further provides a reversing valve, wherein the reversing valve 100 comprises a valve body 3, a valve rod cavity 2 is configured in the valve body 3, and the reversing valve rod 1 as described above is slidably mounted in the valve rod cavity 2.
Specifically, the valve body 3 shown in this embodiment is further configured with a first oil supply port P, a first oil return port T, a first working oil port a, and a second working oil port B; the valve rod cavity 2 is respectively communicated with a first oil supply port, a first oil return port, a first working oil port and a second working oil port, and the first working oil port and the second working oil port are respectively used for being communicated with a cavity of a hydraulic actuating element; under the condition that the reversing valve rod 1 is located at the middle position, the first oil supply port is communicated with the first oil return port, the first oil supply port is respectively communicated with the first working oil port and the second working oil port, and the first oil return port is respectively communicated with the first working oil port and the second working oil port. The hydraulic actuator shown in this embodiment may be a cylinder or a hydraulic motor, and is not limited in this respect.
As shown in fig. 2 and 7, the first oil supply port communicates with the middle chamber section 20 and the third chamber section 26, respectively; the first oil return port is communicated with the first cavity section 22; the first working oil port is communicated with the second cavity section 24 on one side of the middle cavity section 20, and the second working oil port is communicated with the second cavity section 24 on the other side of the middle cavity section 20; under the condition that the reversing valve rod 1 is located at a middle position, a middle position shaft shoulder 10 is arranged in a middle position cavity body section 20, one end, far away from the middle position shaft shoulder 10, of a first shaft shoulder 12 is in sealing fit with a second sealing section 23, one end, close to the middle position shaft shoulder 10, of the first shaft shoulder 12 is located in a first cavity body section 22, the first end of an oil guiding structure 121 on the reversing valve rod 1 is communicated with the first cavity body section 22, the second end of the oil guiding structure 121 is communicated with a second cavity body section 24, the second shaft shoulder 14 is in contact sealing with a third sealing section 25 and a fourth sealing section 27 at the same time, a first oil supply port is communicated with the third cavity body section 26, and an oil outlet 131 is communicated with the second cavity body section 24.
As shown in fig. 8, the present embodiment further provides a hydraulic rotary valve, which includes the cushion switch valve 200 and the switch valve 100 as described above; the buffering reversing valve 200 includes a second oil supply port, a second oil return port, a third working oil port and a fourth working oil port, the second oil supply port is communicated with the first working oil port on the reversing valve 100, the second oil return port is communicated with the second working oil port on the reversing valve 100, and the third working oil port and the fourth working oil port are respectively communicated with the cavity of the hydraulic actuator.
It should be noted that when the cushion reversing valve 200 and the reversing valve 100 are integrated on the same valve body 3, since the second oil supply port is communicated with the first working oil port a of the reversing valve 100 and the second oil return port is communicated with the second working oil port B of the reversing valve 100, the second oil supply port of the cushion reversing valve 200 can also be denoted by a and the second oil return port of the cushion reversing valve 200 can also be denoted by B. Meanwhile, a third working port is denoted as a1, and a fourth working port is denoted as B1.
Meanwhile, in the embodiment, when the valve rod of the buffer reversing valve 200 is in the middle position, the oil path between the second oil supply port and the third working oil port is cut off, and the oil path between the second oil return port and the fourth working oil port is cut off, so that when the working machine is in a gradient environment, the oil pressure on the oil path of the hydraulic execution component of the working machine can be ensured to be stable, and the phenomenon that the boom connected with the hydraulic execution component slips down on a slope can be effectively prevented.
It should be noted that the hydraulic actuator shown in this embodiment is specifically a hydraulic motor, the hydraulic motor is used for driving the rotary platform to rotate, and the arm support is mounted on the rotary platform.
Preferably, the present embodiment also provides a hydraulic system comprising a reversing valve 100 as described above, or a hydraulic rotary valve as described above.
Preferably, the present embodiment also provides a work machine comprising a directional valve 100 as described above, or a hydraulic rotary valve as described above, or a hydraulic system as described above.
The working machine may be a crane, an excavator, a trenching machine, a concrete pump truck, a fire engine, etc. known in the art, and is not particularly limited herein.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (12)
1. The utility model provides a switching-over valve rod, the middle part of the body of rod of switching-over valve rod is equipped with the meso position shaft shoulder, the meso position shaft shoulder extremely the both ends of the body of rod are equipped with first logical oil groove, first shaft shoulder, second logical oil groove and second shaft shoulder in proper order, and its characterized in that still includes:
the oil inlet is formed in the side wall of the second shaft shoulder, the oil outlet is formed in the second oil through groove, and the oil outlet is communicated with the oil inlet;
the oil guide structure is constructed on the side wall of the first shaft shoulder, the first end of the oil guide structure is close to the middle part of the first shaft shoulder, and the second end of the oil guide structure is formed at one end, away from the middle shaft shoulder, of the first shaft shoulder;
a flow restriction structure configured on a sidewall of the medial shoulder, the flow restriction structure extending from a position at or near a middle of the medial shoulder toward at least one end of the medial shoulder.
2. The reversing valve stem of claim 1, wherein the throttling structure comprises a balance oil groove extending in an axial direction of the reversing valve stem, a first end of the balance oil groove being formed at one end of the neutral shoulder and a second end being formed at the other end of the neutral shoulder.
3. The reversing valve stem of claim 2, wherein the throttling structure comprises a first oil guide groove and a second oil guide groove; the first oil guide groove and the second oil guide groove extend along the axial direction of the reversing valve rod; the first end of the first oil guide groove is formed in the middle part close to the middle shaft shoulder, and the second end of the first oil guide groove is formed at one end of the middle shaft shoulder; the first end of the second oil guide groove is formed in the middle part close to the middle shaft shoulder, and the second end of the second oil guide groove is formed at the other end of the middle shaft shoulder.
4. The reversing valve rod according to claim 3, wherein a plurality of first oil guide grooves, a plurality of balance oil grooves and a plurality of second oil guide grooves are arranged on the side wall of the middle shaft shoulder in sequence along the circumferential direction; the circumferential distance between the first oil guide groove and the balance oil groove is equal to the circumferential distance between the balance oil groove and the second oil guide groove;
and/or the first end of the first oil guide groove and the second end of the second oil guide groove are located on the first side of the radial plane where the middle part of the middle shaft shoulder is located, and the second end of the first oil guide groove and the first end of the second oil guide groove are located on the second side of the radial plane.
5. The reversing valve rod according to any one of claims 1 to 4, wherein a one-way valve is arranged in a rod body of the reversing valve rod, and the one-way valve is connected between the oil inlet and the oil outlet so as to control hydraulic oil to flow from the oil inlet to the oil outlet;
and/or the oil inlet is provided with a plurality of oil inlets and is formed on the side wall of the second shaft shoulder along the circumferential direction.
6. The reversing valve stem according to any one of claims 1 to 4, wherein the oil guiding structure extends in an axial direction of the reversing valve stem, the oil guiding structure comprises an oil passing surface or an oil groove, and a radial distance of a second end of the oil guiding structure relative to a central axis of the reversing valve stem is smaller than a radial distance of a first end of the oil guiding structure relative to the central axis of the reversing valve stem;
and/or the oil guide structure is provided with a plurality of oil guide structures and is formed on the side wall of the first shaft shoulder along the circumferential direction.
7. The utility model provides a switching-over valve rod, the middle part of the body of rod of switching-over valve rod is equipped with the meso position shaft shoulder, the meso position shaft shoulder extremely the both ends of the body of rod are equipped with first logical oil groove, first shaft shoulder, second logical oil groove and second shaft shoulder in proper order, and its characterized in that still includes:
the oil inlet is formed in the side wall of the second shaft shoulder, the oil outlet is formed in the second oil through groove, and the oil outlet is communicated with the oil inlet; the oil inlet comprises a first oil inlet and a second oil inlet, and the diameter of the first oil inlet is smaller than that of the second oil inlet; in the axial direction of the reversing valve rod, the distance from the first oil inlet to the middle shaft shoulder is greater than the distance from the second oil inlet to the middle shaft shoulder;
the oil guide structure is constructed on the side wall of the first shaft shoulder, the first end of the oil guide structure is close to the middle part of the first shaft shoulder, and the second end of the oil guide structure is formed at one end, away from the middle shaft shoulder, of the first shaft shoulder;
a flow restriction structure configured on a sidewall of the medial shoulder, the flow restriction structure extending from a position at or near a middle of the medial shoulder toward at least one end of the medial shoulder.
8. A reversing valve comprising a valve body having a stem cavity formed therein, wherein a reversing valve stem according to any one of claims 1 to 6 or a reversing valve stem according to claim 7 is slidably mounted in the stem cavity.
9. The reversing valve according to claim 8, wherein the valve body is further configured with a first oil supply port, a first oil return port, a first working oil port and a second working oil port; the valve rod cavity is respectively communicated with the first oil supply port, the first oil return port, the first working oil port and the second working oil port;
the valve rod cavity is provided with a middle cavity body section positioned in the middle, and a first sealing section, a first cavity body section, a second sealing section, a second cavity body section, a third sealing section, a third cavity body section and a fourth sealing section which are sequentially communicated are further arranged at two ends of the middle cavity body section to the valve rod cavity;
the first oil supply port is communicated with the middle cavity section and the third cavity section respectively; the first oil return port is communicated with the first cavity section; the first working oil port is communicated with the second cavity section on one side of the middle cavity section, and the second working oil port is communicated with the second cavity section on the other side of the middle cavity section;
under the circumstances that the switching-over valve rod is in the meso position, place in the meso position shaft shoulder meso position cavity section, first shaft shoulder is kept away from the one end of meso position shaft shoulder with the sealed cooperation of second, first shaft shoulder is close to the one end of meso position shaft shoulder is located in the first cavity section, the first end of leading oily structure on the switching-over valve rod with first cavity section intercommunication, lead oily structure the second end with second cavity section intercommunication, the second shaft shoulder simultaneously with the third sealed section reaches fourth sealed section contact seal, first fuel feeding port with third cavity section intercommunication, the oil-out with second cavity section intercommunication.
10. A hydraulic rotary valve including a cushion diverter valve and a diverter valve as claimed in claim 8 or 9;
the buffer reversing valve comprises a second oil supply port, a second oil return port, a third working oil port and a fourth working oil port, the second oil supply port is communicated with the first working oil port on the reversing valve, the second oil return port is communicated with the second working oil port on the reversing valve, and the third working oil port and the fourth working oil port are used for being communicated with a cavity of a hydraulic execution element;
and under the condition that a valve rod of the buffer reversing valve is positioned at a middle position, an oil path between the second oil supply port and the third working oil port is cut off, and an oil path between the second oil return port and the fourth working oil port is cut off.
11. A hydraulic system comprising a diverter valve according to claim 8 or 9 or a hydraulic rotary valve according to claim 10.
12. A work machine comprising a diverter valve according to claim 8 or 9, or a hydraulic rotary valve according to claim 10, or a hydraulic system according to claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120551636.0U CN214661171U (en) | 2021-03-17 | 2021-03-17 | Reversing valve rod, reversing valve, hydraulic rotary valve, hydraulic system and operating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120551636.0U CN214661171U (en) | 2021-03-17 | 2021-03-17 | Reversing valve rod, reversing valve, hydraulic rotary valve, hydraulic system and operating machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214661171U true CN214661171U (en) | 2021-11-09 |
Family
ID=78453867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120551636.0U Active CN214661171U (en) | 2021-03-17 | 2021-03-17 | Reversing valve rod, reversing valve, hydraulic rotary valve, hydraulic system and operating machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214661171U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115306788A (en) * | 2022-10-10 | 2022-11-08 | 启东德乐润滑设备有限公司 | Electromagnetic reversing device with flow speed control function |
-
2021
- 2021-03-17 CN CN202120551636.0U patent/CN214661171U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115306788A (en) * | 2022-10-10 | 2022-11-08 | 启东德乐润滑设备有限公司 | Electromagnetic reversing device with flow speed control function |
| CN115306788B (en) * | 2022-10-10 | 2022-12-20 | 启东德乐润滑设备有限公司 | Electromagnetic reversing device with flow speed control function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6397890B1 (en) | Variable metering fluid control valve | |
| CN214661171U (en) | Reversing valve rod, reversing valve, hydraulic rotary valve, hydraulic system and operating machine | |
| CN109790857B (en) | Hydraulic drive system for construction machine | |
| CN107059983B (en) | Minus flow imports and exports independent composite control hydraulic system | |
| CN113338790B (en) | Reversing valve of hydraulic rock drill | |
| CN106640826B (en) | Integrated hydraulic valve group and the fluid power system and concrete pump that the valve group is set | |
| KR102333767B1 (en) | Control valves for shovels and shovels | |
| CN103912692B (en) | Hydraulic pilot structure and drive independent load multiway valve with the rotating machine of this structure | |
| CN109563854A (en) | Valve gear and the fluid-pressure system for being equipped with the valve gear | |
| CN106801691A (en) | Concrete pump and its hydraulic system, control method | |
| JP6647826B2 (en) | Directional valve and hydraulic system | |
| JP2018087634A (en) | Hydraulic systems for construction machinery | |
| KR20010022811A (en) | Two-cylinder thick matter pump | |
| CN107407299A (en) | The oil pressure actuated systems of building machinery | |
| JP2018087635A (en) | Hydraulic systems for construction machinery | |
| CN105604109B (en) | A kind of hydraulic regeneration system of excavator swing arm | |
| CN214661170U (en) | Cushion valve rod, cushion valve, hydraulic rotary valve, hydraulic system and operating machine | |
| KR102385608B1 (en) | Control valves for shovels and shovels | |
| JP2010230060A (en) | Hydraulic control circuit for construction machine | |
| CN101403397B (en) | Load-sensitive and logical double-pump switching valve structure | |
| JP2010070978A (en) | Construction machine | |
| CN104179738A (en) | Open hydraulic system for glide loading machine | |
| CN113251017A (en) | Flow regulation type oil pumping system, hydraulic crushing system and excavator | |
| JP4767934B2 (en) | Hydraulic pump controller for construction machinery | |
| CN103114994B (en) | A kind of Vane-type hydraulic machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |