CN109826839B - Anti-reverse valve for rotary motor and engineering machinery - Google Patents
Anti-reverse valve for rotary motor and engineering machinery Download PDFInfo
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- CN109826839B CN109826839B CN201910247954.5A CN201910247954A CN109826839B CN 109826839 B CN109826839 B CN 109826839B CN 201910247954 A CN201910247954 A CN 201910247954A CN 109826839 B CN109826839 B CN 109826839B
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Abstract
The invention discloses an anti-reverse valve for a rotary motor and engineering machinery, and belongs to the technical field of engineering machinery. The anti-reverse valve includes: the valve body is internally provided with a valve core channel, and is also provided with a first oil port and a second oil port which are communicated with the valve core channel, wherein a communication cavity is further arranged between the first oil port and the second oil port and is communicated with the valve core channel; a spool rod which is located in the spool passage and can reciprocate in the spool passage; the valve core rod is internally provided with a first channel communicated with the first oil port and a second channel communicated with the second oil port, and the first channel and the second channel can be selectively communicated through a communication cavity: the two ends of the valve core rod are respectively provided with a first control channel and a second control channel, the first control channel extends inwards from one end and is communicated with the first channel, and the second control channel extends inwards from the other end and is communicated with the second channel. The engineering machinery comprises the anti-reverse valve. The anti-reversion valve of the rotary motor has few parts and simple structure.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to an anti-reverse valve for a rotary motor and engineering machinery.
Background
Rotary motors are widely used in various engineering machinery, such as excavators, cranes, rotary drills, and the like. Taking the example of a swing motor for an excavator, it may provide drive and braking torque for the swing of the excavator upper mechanism. However, the swing motor oscillates and reverses due to inertial impact when performing swing braking. The specific working process comprises the following steps: when the rotary motor rotates unidirectionally, the motor is driven to rotate by high-pressure oil; when a rotation stopping signal is received in the unidirectional rotation process of the rotary motor, namely in a braking stage, the high-pressure oil port of the rotary motor stops oil supply, the rotary motor works according to a pump mode due to the inertia of an upper mechanism of the excavator, the original high-pressure oil port gradually decreases due to the volume-increased pressure, and the original low-pressure oil port gradually increases due to the compression pressure of the cavity, so that the rotary motor receives reverse braking torque; when the unidirectional rotation of the rotary motor is stopped, the original low-pressure cavity pressure is changed into high pressure, so that reverse driving torque is provided for the rotary motor, and the rotary motor reversely rotates; the upper mechanism of the excavator generates oscillation and reverse rotation after repeating the actions, and the excavator cannot be braked stably.
In order to smoothly brake the swing motor, an anti-reverse valve is generally provided in the excavator.
As shown in fig. 1 and 2, two hydraulic valves are installed on a valve block 9' of the conventional anti-reverse valve for a rotary motor, an outer valve sleeve 1' of each hydraulic valve is installed in the valve block 9', an inner valve sleeve 4' is arranged inside the outer valve sleeve 1', a plunger 3' is arranged in the inner valve sleeve 4', an oil groove is arranged outside the plunger 3', a spring 5' is installed outside the inner valve sleeve 4', a small valve core 7' with a through hole in the middle is installed at one end, inside the outer valve sleeve 1', of the valve block 9', a steel ball 6' is arranged between the small valve core 7' and the inner valve sleeve 4', an inclined hole is formed between two ends, connected with the plunger 3' and the steel ball 6', of the inner valve sleeve 4', a conical spring 8' is arranged outside the small valve core 7', and a screw plug 2' is installed at the tail of the outer valve sleeve 1 '. By utilizing the action of a small orifice in the valve, the two valve rods of the two working ports A 'and B' of the motor are closed in the valve to generate speed difference to conduct the two working ports A 'and B' of the motor, and oil at the working port at the high pressure end is discharged to the low pressure end, so that the rotary reversing is only performed once, the rotary motor can be stopped rapidly, and the vibration times are reduced.
However, the existing anti-reversion valve for the rotary motor has various parts and components, is very complex in structure, and further has the problems of poor opening and closing performance, poor performance controllability, high processing difficulty, high manufacturing cost, difficult maintenance and the like.
Therefore, it is necessary to provide an anti-reverse valve for a swing motor and a construction machine to solve the above problems.
Disclosure of Invention
The invention aims to provide an anti-reversion valve for a rotary motor, which has the advantages of simple structure, less types of parts, easy maintenance and low processing and manufacturing cost.
Another object of the present invention is to provide an engineering machine capable of eliminating oscillation and reverse rotation due to inertial impact during rotation braking, so that the rotation device can be braked smoothly.
To achieve the purpose, the invention adopts the following technical scheme:
An anti-reverse valve for a swing motor, comprising:
The valve body is internally provided with a valve core channel, and is also provided with a first oil port and a second oil port which are communicated with the valve core channel, wherein a communication cavity is further arranged between the first oil port and the second oil port, and the communication cavity is communicated with the valve core channel;
A spool rod located in the spool passage and reciprocally movable therein; the valve core rod is internally provided with a first channel communicated with the first oil port and a second channel communicated with the second oil port, and the first channel and the second channel can be selectively communicated through the communication cavity: the two ends of the valve core rod are respectively provided with a first control channel and a second control channel, the first control channel extends inwards from one end part and is communicated with the first channel, and the second control channel extends inwards from the other end part and is communicated with the second channel;
The high-pressure oil of the first oil port can reach one end of the valve core rod through the first control channel to push the valve core rod to move forward along the first direction, or the high-pressure oil of the second oil port can reach the other end of the valve core rod through the second control channel to push the valve core rod to move reversely along the first direction, so that the first oil port and the second oil port are communicated through the communication cavity.
Optionally, the first channel includes a first sub-channel, a second sub-channel, and a first communication channel that communicates the first sub-channel and the second sub-channel, the first sub-channel is in communication with the first oil port, and the second sub-channel is selectively in communication with the communication cavity;
The second channel comprises a third sub-channel, a fourth sub-channel and a second communication channel which is communicated with the third sub-channel and the fourth sub-channel, the third sub-channel is communicated with the second oil port, and the fourth sub-channel is selectively communicated with the communication cavity.
Optionally, the outer wall of the valve core rod is provided with four ring grooves, and the four ring grooves comprise a first ring groove communicated with the first sub-channel, a second ring groove communicated with the second sub-channel, a third ring groove communicated with the third sub-channel and a fourth ring groove communicated with the fourth sub-channel.
Optionally, the width of the first ring groove along the first direction is greater than the aperture of the hole where the first sub-channel intersects the first ring groove;
The width of the third ring groove along the first direction is larger than the aperture of the hole where the third sub-channel intersects with the third ring groove.
Optionally, a first orifice is disposed in each of the first communication channel and the second communication channel.
Optionally, a second orifice is disposed in each of the first control channel and the second control channel.
Alternatively, the axis of the first communication passage and the axis of the first control passage are collinear; the axis of the second communication passage and the axis of the second control passage are collinear.
Optionally, the aperture of the first control channel is larger than the aperture of the first communication channel, and the aperture of the second control channel is larger than the aperture of the second communication channel.
Optionally, the first communicating channel and the second communicating channel are internally and respectively connected with a first throttling plug in a threaded manner, and the first controlling channel and the second controlling channel are internally and respectively connected with a second throttling plug in a threaded manner.
Alternatively, the anti-reverse rotation valve for a rotary motor is provided with a first pressure measuring port communicated with the first oil port and a second pressure measuring port communicated with the second oil port.
Alternatively, springs are arranged at two ends of the valve core rod.
An engineering machine comprising any one of the above anti-reverse valves for a swing motor.
Alternatively, the engineering machine is an excavator, a crane or a rotary drill.
The invention has the beneficial effects that:
The first channel, the second channel, the first control channel and the second control channel are directly processed on the valve core rod, and the valve core rod is only in installation fit with the valve body. Compared with the prior art that the rotary motor anti-reversion valve has the advantages of multiple parts, complex structure, poor opening and closing performance, poor performance controllability and high failure rate, the whole rotary motor anti-reversion valve has the advantages of fewer parts, simple structure, convenience in processing, simplicity in assembly relation, convenience in maintenance and low failure rate.
Drawings
FIG. 1 is a schematic diagram of the internal structure of a rotary motor anti-reverse valve according to the prior art;
FIG. 2 is a schematic diagram of a rotary motor anti-reverse valve of the prior art;
FIG. 3 is a schematic view of a first view of an anti-reverse valve for a swing motor according to an embodiment of the present invention;
FIG. 4 is a schematic view of a second view of an anti-reverse valve for a swing motor according to an embodiment of the present invention;
FIG. 5 is a schematic view of a third view of an anti-reverse valve for a swing motor according to an embodiment of the present invention;
FIG. 6 is a schematic view showing an internal structure of an anti-reverse valve for a swing motor according to an embodiment of the present invention when the valve is in a neutral position;
FIG. 7 is a schematic diagram of an anti-reverse valve for a swing motor in accordance with an embodiment of the present invention in a neutral position;
FIG. 8 is a schematic view showing an internal structure of an anti-reverse valve for a swing motor according to an embodiment of the present invention in a left position;
FIG. 9 is a schematic diagram of an anti-reverse valve for a swing motor in a left position according to an embodiment of the present invention;
FIG. 10 is a schematic view showing the internal structure of an anti-reverse valve for a swing motor according to an embodiment of the present invention in a right position;
fig. 11 is a schematic diagram of a swing motor anti-reverse valve according to an embodiment of the present invention in the right position.
In fig. 1 and 2:
1', an outer valve sleeve; 2', a screw plug; 3', a plunger; 4', an inner valve sleeve; 5', a spring; 6', a steel ball; 7', a small valve core; 8', a cone spring; 9', valve block.
In fig. 3-11:
1. a valve body; 11. a first oil port; 12. a second oil port; 13. a communication chamber; 14. a spool passage; 141. a first cavity; 142. a second cavity; 15. a first pressure tap; 16. a second pressure tap;
2. A valve core rod; 21. a first channel; 211. a first sub-channel; 212. a second sub-channel; 213. a first communication passage; 22. a second channel; 221. a third sub-channel; 222. a fourth sub-channel; 223. a second communication passage; 23. a first control channel; 24. a second control channel; 25. a first ring groove; 26. a second ring groove; 27. a third ring groove; 28. a fourth ring groove;
3. a first throttle plug; 4. the second throttling plug; 5. a first plug; 6. a second plug; 7. and a third plug.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
As shown in fig. 3 to 11, the present embodiment discloses an anti-reverse valve for a swing motor, which can be used in engineering machinery, such as an excavator, a crane, a rotary drill, etc., to eliminate vibration and reverse rotation due to inertial impact during swing braking, so that a swing device can be smoothly braked.
Fig. 6 is a schematic view showing an internal structure of the anti-reverse valve for a swing motor according to the present embodiment when the valve is in the neutral position. Specifically, the anti-reverse valve for a swing motor includes a valve body 1 and a spool rod 2. The valve body 1 is internally provided with a valve core channel 14, a first oil port 11 and a second oil port 12 which are communicated with the valve core channel 14, a communication cavity 13 is further arranged between the first oil port 11 and the second oil port 12, and the communication cavity 13 is communicated with the valve core channel 14; the spool rod 2 is located in the spool passage 14, and the length of the spool rod 2 is smaller than the length of the spool passage 14 so that the spool rod 2 can reciprocate in the spool passage 14. And a first channel 21 and a second channel 22 are arranged in the valve core rod 2, wherein one end of the first channel 21 is communicated with the first oil port 11, one end of the second channel 22 is communicated with the second oil port 12, and the other end of the first channel 21 and the other end of the second channel 22 can be selectively communicated through the communication cavity 13. The valve core rod 2 is further provided with a first control channel 23 and a second control channel 24 at both ends thereof, the first control channel 23 extending inwardly from one end portion to communicate with the first channel 21, and the second control channel 24 extending inwardly from the other end portion to communicate with the second channel 22. The high-pressure oil of the first oil port 11 can reach one end of the valve core rod 2 through the first control channel 23 to push the valve core rod 2 to move forward along the first direction, or the high-pressure oil of the second oil port 12 can reach the other end of the valve core rod 2 through the second control channel 24 to push the valve core rod 2 to move reversely along the first direction, so that the first oil port 11 and the second oil port 12 are communicated through the communication cavity 13, and the side with higher pressure is communicated with the side with lower pressure, so that the pressure is balanced, the rotary motor loses reverse driving torque, and reverse rotation is stopped. In this embodiment, the first channel 21 and the second channel 22, and the first control channel 23 and the second control channel 24 are only processed on the valve core rod 2, and the valve core rod 2 is only required to be mounted and matched with the valve body 1. Compared with the prior art, the device has the advantages of multiple parts, complex structure, poor opening and closing performance, poor performance controllability and high failure rate. In the embodiment, the whole rotary motor anti-reversion valve has the advantages of fewer parts, simple structure, convenient processing, simple assembly relation, convenient maintenance and low failure rate.
Fig. 6 is a schematic view showing an internal structure of the anti-reverse valve for a swing motor according to the present embodiment when the valve is in the neutral position. Fig. 7 is a schematic diagram of the present embodiment in which the anti-reverse valve for a swing motor is in the neutral position. Fig. 8 is a schematic view showing the internal structure of the anti-reverse valve for a swing motor according to the present embodiment in the left position. Fig. 9 is a schematic diagram of the anti-reverse valve for the swing motor in the present embodiment in the left position. Fig. 10 is a schematic view showing the internal structure of the anti-reverse valve for a swing motor according to the present embodiment in the right position. Fig. 11 is a schematic diagram of the present embodiment in which the anti-reverse valve for a swing motor is in the right position. Referring to fig. 6 to 11, the anti-reverse valve for a swing motor in this embodiment may be divided into three stations including a left position, a middle position and a right position. When the valve core rod 2 is in the middle position, because the length of the valve core channel 14 is longer than that of the valve core rod 2, at the moment, a first containing cavity 141 and a second containing cavity 142 are respectively formed at two ends of the valve core rod 2, wherein one end of the first channel 21 is communicated with the first oil port 11, and the other end of the first channel 21 is communicated with the communication cavity 13; one end of the second channel 22 is communicated with the second oil port 12, the other end of the second channel 22 is communicated with the communication cavity 13, the first control channel 23 is communicated with the first containing cavity 141, and the second control channel 24 is communicated with the second containing cavity 142.
The use of a swing motor anti-reverse valve in an excavator is specifically described. In operation, the first oil port 11 is connected with the port A of the rotary motor, and the second oil port 12 is connected with the port B of the rotary motor.
1) Referring to fig. 6 to 9, when the rotary motor rotates unidirectionally, assuming that the first oil port 11 is an oil supply port, unidirectional driving torque is provided for the rotary motor, that is, the first oil port 11 is a high pressure area, the second oil port 12 is a low pressure area, high pressure oil passes through the first control channel 23 to reach the first cavity 141 at one end of the valve core rod 2, the pressure in the first cavity 141 is greater than that in the second cavity 142, the valve core rod 2 is pushed to move rightwards, the volume of the first cavity 141 is increased, the volume of the second cavity 142 is reduced, and the anti-reverse valve for the rotary motor tends to a left working state.
2) When the rotation stopping signal is received in the unidirectional rotation process of the rotary motor, the oil supply of the port A of the rotary motor is stopped, namely the oil supply of the first oil port 11 is stopped, the rotary motor works according to a pump mode due to the inertia of an upper mechanism of the excavator, the pressure of a cavity communicated with the first oil port 11 is gradually reduced due to the increase of the pressure of the cavity, and the pressure of the cavity communicated with the second oil port 12 is gradually increased due to the decrease of the pressure of the cavity, so that reverse braking torque is provided for the rotary motor, and unidirectional braking and gradual stopping movement of the rotary motor are realized; in this process, since the original low pressure area is changed into the high pressure area, the second oil port 12 is the high pressure area, the first oil port 11 is the low pressure area, and the high pressure oil passes through the second control channel 24 to reach the second cavity 142 at one end of the valve core rod 2, where the pressure in the second cavity 142 is greater than that in the first cavity 141, so as to push the valve core rod 2 to move leftwards. When the valve core rod 2 is pushed to the middle position, high-pressure oil of the second oil port 12 flows into the communication cavity 13 through the second channel 22, the first channel 21 is also communicated with the communication cavity 13, so that the first oil port 11 and the second oil port 12 can be communicated, the pressure of the two areas is further equal, at the moment, the pressure of the second oil port 12 is reduced, the reversing driving torque of the rotary motor is lost, and the reversing is stopped.
3) Referring to fig. 6,7, 10 and 11, when the swing motor rotates reversely, i.e., the second oil port 12 is an oil supply chamber, unidirectional driving torque is provided for the swing motor, i.e., the second oil port 12 is a high pressure area, the first oil port 11 is a low pressure area, high pressure oil reaches the second cavity 142 from the second control channel 24, the pressure in the second cavity 142 is greater than that of the first cavity 141, the valve core rod 2 is pushed to move leftwards, the volume of the second cavity 142 is increased, the volume of the first cavity 141 is reduced, and the anti-reverse valve for the swing motor tends to a right working state.
4) When the rotation stopping signal is received during the reverse rotation of the rotary motor, the working process is similar to 2, and the description is omitted.
Specifically, referring to fig. 6, the first passage 21 includes a first sub-passage 211, a second sub-passage 212, and a first communication passage 213 communicating the first sub-passage 211 and the second sub-passage 212, the first sub-passage 211 communicating with the first oil port 11, the second sub-passage 212 selectively communicating with the communication chamber 13; the second passage 22 includes a third sub-passage 221, a fourth sub-passage 222, and a second communication passage 223 communicating the third sub-passage 221 and the fourth sub-passage 222, the third sub-passage 221 communicates with the second oil port 12, and the fourth sub-passage 222 can selectively communicate with the communication chamber 13. In the present embodiment, the first communication passage 213 and the second communication passage 223 are each disposed along the axial direction of the spool rod 2, and the first sub-passage 211, the second sub-passage 212, the third sub-passage 221, and the fourth sub-passage 222 are each disposed along the radial direction of the spool rod 2. Further alternatively, the axis of the first communication passage 213 and the axis of the first control passage 23 are collinear; the axis of the second communication passage 223 and the axis of the second control passage 24 are collinear. This facilitates the processing of the channels in the valve core rod 2. In a specific machining, the machining tool may punch holes from both ends of the spool rod 2 to the inside thereof, respectively, and machining the first control passage 23 and the first communication passage 213 at one end of the spool rod 2 and the second control passage 24 and the second communication passage 223 at the other end thereof ensures that the two holes do not communicate when punching holes from both ends, and then punch holes radially inward from the outer periphery of the spool rod 2 and communicate the first communication passage 213 or the second communication passage 223, thereby machining the first sub-passage 211, the second sub-passage 212, the third sub-passage 221, and the fourth sub-passage 222.
Since the spool rod 2 is generally cylindrical in structure, the outer wall is arcuate in shape so that it establishes an oil film within the spool passage 14. Based on this, the spool rod 2 with a cylindrical structure is easy to rotate in the spool channel 14, and the first sub-channel 211, the second sub-channel 212, the third sub-channel 221 and the fourth sub-channel 222 are all channels radially arranged from the outer side of the spool rod 2, when the oil ports of each sub-channel do not correspond to the corresponding oil ports or the communication cavity 13, oil cannot enter the corresponding channels to enable the anti-reverse valve for the rotary motor to work normally. Alternatively, referring to fig. 8, the outer wall of the valve core rod 2 is provided with four ring grooves, which communicate with the first sub-passage 211, the second sub-passage 212, the third sub-passage 221, and the fourth sub-passage 222, respectively. Specifically, the four ring grooves include a first ring groove 25 in communication with the first sub-channel 211, a second ring groove 26 in communication with the second sub-channel 212, a third ring groove 27 in communication with the third sub-channel 221, and a fourth ring groove 28 in communication with the fourth sub-channel 222. The ring grooves are arranged, so that no matter how the valve core rod 2 rotates in the valve core channel 14, oil can reach the corresponding channel through the corresponding ring grooves, and the anti-reverse valve for the rotary motor can work normally. In addition, due to the arrangement of the annular groove, the valve core rod 2 can be subjected to uniform oil pressure on the outer circumferential surface provided with the annular groove, so that radial force balance is achieved, and the situation that the valve core rod 2 is only partially pressed on the outer circumferential surface, so that the valve core rod 2 with long length is partially deformed radially is avoided; in addition, due to the arrangement of the annular groove, the contact area of the valve core rod 2 and the valve body 1 is reduced, and the friction force between the valve core rod 2 and the valve body 1 is further reduced.
Further, the spool rod 2 reciprocates in the forward and reverse directions in the first direction under the pressure of the first port 11 or the second port 12, but it is still necessary to ensure that the first sub-passage 211 communicates with the first port 11 and the third sub-passage 221 communicates with the second port 12. Alternatively, the first sub-passage 211 in the valve core rod 2 may always communicate with the first oil port 11 and the third sub-passage 221 may always communicate with the second oil port 12 by increasing the width of the first ring groove 25 communicating with the first sub-passage 211 and the width of the third ring groove 27 communicating with the third sub-passage 221. The specific setting can be carried out by adopting the extreme cases of the valve core rod 2 at the left position and the right position as the basis. That is, the width of the first ring groove 25 in the first direction is greater than the aperture of the hole where the first sub-channel 211 intersects the first ring groove; the width of the third annular groove 27 along the first direction is larger than the aperture of the hole where the third sub-channel 221 intersects with the third annular groove 27, and the arrangement mode enables the first sub-channel 211 to be always communicated with the first oil port 11 without increasing the aperture of the first sub-channel 211 and the aperture of the third sub-channel 221, and the third sub-channel 221 is always communicated with the second oil port 12.
Referring to fig. 6, 8 and 10, in order to achieve smooth braking of the swing motor and to achieve smooth braking for a predetermined time, a first orifice is optionally provided in each of the first communication passage 213 and the second communication passage 223; or, a second orifice is provided in each of the first control passage 23 and the second control passage 24; alternatively, the first communication passage 213 and the second communication passage 223 are each provided with a first orifice, and the first control passage 23 and the second control passage 24 are each provided with a second orifice. Specifically, in this embodiment, the first throttle plug 3 is screwed into each of the first communication channel 213 and the second communication channel 223, and the second throttle plug 4 is screwed into each of the first control channel 23 and the second control channel 24. Alternatively, in order to facilitate the installation of the first throttle plug 3 and the second throttle plug 4, the aperture of the first control passage 23 is larger than the aperture of the first communication passage 213, and the aperture of the second control passage 24 is larger than the aperture of the second communication passage 223. In the specific installation, the first throttle plug 3 is installed in the first communication channel 213 and the second communication channel 223 with smaller diameters, and then the second throttle plug 4 is installed in the first control channel 23 and the second control channel 24 with larger diameters. Through setting up detachable throttle plug, not only reduced the degree of difficulty of processing orifice, make prevent reversing valve moreover and can set up different throttle plugs according to the application object that does not use, increased flexibility and the commonality that prevent reversing valve used.
Specifically, referring to fig. 3-6, in this embodiment, a valve core channel 14 in a valve body 1 penetrates from one end to the other end of the valve body 1, and after a valve core rod 2 penetrates through the valve core channel 14, both ends are respectively blocked by a first plug 5; the communication chamber 13 may also extend directly from one side of the valve body 1 into the valve body 1 until communicating with the valve core channel 14, wherein the communication chamber 13 may intersect the valve core channel 14 vertically, and the process hole for processing the communication chamber 13 may be blocked with the second plug 6.
Further alternatively, the swing motor anti-reverse valve is provided with a first pressure measurement port 15 communicating with the first oil port 11, and a second pressure measurement port 16 communicating with the second oil port 12. When the pressure detection elements are arranged on the first pressure measuring port 15 and the second pressure measuring port 16, the pressure of the first oil port 11 and the pressure of the second oil port 12 are visualized, and the working mode of the anti-reversing valve can be conveniently judged. When the first pressure measuring port 15 and the second pressure measuring port 16 are not required to measure pressure, the first pressure measuring port 15 and the second pressure measuring port 16 can be respectively plugged by the third plug 7. The arrangement of the first pressure measuring port 15 and the second pressure measuring port 16 increases the flexibility of the anti-reverse valve, and adapts to different requirements of users.
In addition, optionally, springs are provided at both ends of the spool rod 2 to prevent the spool rod 2 from rattling within the spool channel 14. In this embodiment, the swing motor anti-reverse valve is used in an excavator, and the anti-reverse valve itself has a small possibility of shaking, and a spring may not be provided.
In addition, the embodiment also comprises an engineering machine, and the anti-reverse valve for the rotary motor is comprised. The engineering machinery can be an excavator, a crane or a rotary drilling bit.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (12)
1. An anti-reverse valve for a rotary motor, comprising:
The valve comprises a valve body (1), wherein a valve core channel (14) is arranged in the valve body, a first oil port (11) and a second oil port (12) which are communicated with the valve core channel (14) are also arranged, a communication cavity (13) is further arranged between the first oil port (11) and the second oil port (12), and the communication cavity (13) is communicated with the valve core channel (14);
A spool rod (2) which is located in the spool passage (14) and is reciprocally movable in the spool passage (14); a first channel (21) communicated with the first oil port (11) and a second channel (22) communicated with the second oil port (12) are arranged in the valve core rod (2), and the first channel (21) and the second channel (22) can be selectively communicated through the communication cavity (13): a first control channel (23) and a second control channel (24) are respectively arranged at two ends of the valve core rod (2), the first control channel (23) extends inwards from one end and is communicated with the first channel (21), and the second control channel (24) extends inwards from the other end and is communicated with the second channel (22);
The high-pressure oil of the first oil port (11) can reach one end of the valve core rod (2) through the first control channel (23) to push the valve core rod (2) to move forward along a first direction, or the high-pressure oil of the second oil port (12) can reach the other end of the valve core rod (2) through the second control channel (24) to push the valve core rod (2) to move reversely along the first direction, so that the first oil port (11) and the second oil port (12) are selectively communicated through the communication cavity (13);
The first channel (21) comprises a first sub-channel (211), a second sub-channel (212) and a first communication channel (213) for communicating the first sub-channel (211) with the second sub-channel (212), wherein the first sub-channel (211) is communicated with the first oil port (11), and the second sub-channel (212) can be selectively communicated with the communication cavity (13);
The second channel (22) comprises a third sub-channel (221), a fourth sub-channel (222) and a second communication channel (223) which is used for communicating the third sub-channel (221) and the fourth sub-channel (222), the third sub-channel (221) is communicated with the second oil port (12), and the fourth sub-channel (222) is selectively communicated with the communication cavity (13).
2. The anti-reverse valve for a swing motor according to claim 1, wherein four ring grooves are provided on an outer wall of the spool rod (2), the four ring grooves including a first ring groove (25) communicating with the first sub-passage (211), a second ring groove (26) communicating with the second sub-passage (212), a third ring groove (27) communicating with the third sub-passage (221), and a fourth ring groove (28) communicating with the fourth sub-passage (222).
3. The anti-reverse valve for a swing motor according to claim 2, wherein a width of the first ring groove (25) in the first direction is larger than a hole diameter of a hole where the first sub-passage (211) intersects with the first ring groove (25);
the width of the third ring groove (27) along the first direction is larger than the aperture of a hole where the third sub-channel (221) intersects with the third ring groove (27).
4. The anti-reverse valve for a swing motor according to claim 1, wherein a first orifice is provided in each of the first communication passage (213) and the second communication passage (223).
5. The anti-reverse valve for a swing motor according to claim 1 or 4, wherein a second orifice is provided in each of the first control passage (23) and the second control passage (24).
6. The anti-reverse valve for a swing motor according to claim 1, wherein an axis of the first communication passage (213) and an axis of the first control passage (23) are collinear; an axis of the second communication passage (223) and an axis of the second control passage (24) are collinear.
7. The anti-reverse valve for a swing motor according to claim 6, wherein the first control passage (23) has a larger pore diameter than the first communication passage (213), and the second control passage (24) has a larger pore diameter than the second communication passage (223).
8. The anti-reverse valve for a rotary motor according to claim 7, wherein a first throttle plug (3) is screwed in each of the first communication passage (213) and the second communication passage (223), and a second throttle plug (4) is screwed in each of the first control passage (23) and the second control passage (24).
9. The anti-reverse valve for a swing motor according to claim 1, wherein the anti-reverse valve for a swing motor is provided with a first pressure measurement port (15) communicating with the first oil port (11), and a second pressure measurement port (16) communicating with the second oil port (12).
10. The anti-reverse valve for a swing motor according to claim 1, wherein springs are provided at both ends of the spool rod (2).
11. A construction machine comprising the anti-reverse valve for a swing motor according to any one of claims 1 to 10.
12. The work machine of claim 11, wherein the work machine is an excavator, a crane, or a rotary drill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910247954.5A CN109826839B (en) | 2019-03-29 | 2019-03-29 | Anti-reverse valve for rotary motor and engineering machinery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910247954.5A CN109826839B (en) | 2019-03-29 | 2019-03-29 | Anti-reverse valve for rotary motor and engineering machinery |
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| CN109826839A CN109826839A (en) | 2019-05-31 |
| CN109826839B true CN109826839B (en) | 2024-05-17 |
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| CN201910247954.5A Active CN109826839B (en) | 2019-03-29 | 2019-03-29 | Anti-reverse valve for rotary motor and engineering machinery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114278635B (en) * | 2021-12-29 | 2024-08-16 | 潍柴动力股份有限公司 | Anti-reverse valve for rotary motor |
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| CN109826839A (en) | 2019-05-31 |
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