CN110701128A - Control valve and working method thereof - Google Patents
Control valve and working method thereof Download PDFInfo
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- CN110701128A CN110701128A CN201911161228.8A CN201911161228A CN110701128A CN 110701128 A CN110701128 A CN 110701128A CN 201911161228 A CN201911161228 A CN 201911161228A CN 110701128 A CN110701128 A CN 110701128A
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- valve
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- valve core
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
Abstract
The invention provides a control valve and a working method thereof, wherein the control valve comprises the following steps: the valve comprises a valve body, a reversing valve core, a left end cover, a right end cover, a two-position two-way electromagnetic valve, a spring seat sleeve, a retaining ring, a spring, a valve sleeve, a left flow valve core, a first left spring seat, a second left spring seat, a first left retaining ring, a second left retaining ring, a left spring, a right flow valve core, a first right spring seat, a second right spring seat, a first right retaining ring, a second right retaining ring and a right spring. The anti-slip control valve for the agricultural machine, provided by the embodiment of the invention, is reasonable and simple in structure and high in cost performance.
Description
Technical Field
The invention relates to a hydraulic valve, in particular to a control valve and a working method thereof.
Background
For hydraulic motor driven full hydraulic agricultural machinery, such as hydraulic motor driven self-propelled sprayer, in the paddy field operation process, because the resistance of walking in water is great, when one of four walking wheels driven by hydraulic motor falls into a pothole, the walking wheel will skid. The walking wheel skids to reduce the resistance of the hydraulic motor driving the wheel to rotate, so that the oil quantity supplied to the hydraulic motors on the other three wheels is reduced sharply, hydraulic oil in a loop is almost completely supplied to the hydraulic motor slipping, the skidding phenomenon is further aggravated, the full-hydraulic machine is trapped in a paddy field and cannot walk, the normal work of the hydraulic agricultural machine is influenced, and the problem that the full-hydraulic machine slips in the paddy field is urgently solved.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the invention aims to provide the anti-slip control valve for the agricultural machine, which is reasonable and simple in structure and high in cost performance.
According to the embodiment of the invention, the anti-slip control valve for the agricultural machine comprises:
the valve body, link up about having on the valve body the first valve body through-hole of valve body and being located link up about and above the first valve body through-hole the second valve body through-hole of valve body, first valve body through-flow groove, second valve body through-flow groove and third valve body through-flow groove from a left side to right interval arrangement have on the internal perisporium of first valve body through-hole, have on the internal perisporium of second valve body through-hole from a left side to right interval arrangement fourth valve body through-flow groove, fifth valve body through-flow groove and sixth valve body through-flow groove, have on the valve body and communicate the first runner of first valve body through-flow groove with fourth valve body through-flow groove, communicate the second runner of second valve body through-flow groove with fifth valve body through-flow groove and communicate the third runner of third valve body through-flow groove with the sixth valve body through-flow groove, still have on the lateral wall of valve body first hydraulic fluid port, The first oil port is communicated with the second valve body through flow groove, the second oil port is communicated with the fourth valve body through flow groove, and the third oil port is communicated with the sixth through flow groove;
the reversing valve core is arranged in the first valve body through hole in a left-right moving mode, a reversing valve core blind hole with a leftward opening is formed in the reversing valve core, a reversing valve core through hole for communicating the second valve body through flow groove with the reversing valve core blind hole is formed in the side wall of the reversing valve core, and a reversing valve core damping hole for communicating the bottom of the reversing valve core blind hole with the right end face of the reversing valve core is formed in the right end of the reversing valve core;
the left end cover is arranged on the left side surface of the valve body and used for respectively sealing a left opening of the first valve body through hole and a left opening of the second valve body through hole, a left end cover blind hole with a right opening and opposite to the left opening of the first valve body through hole is formed in the left end cover, and a left control cavity is defined between the left end cover and the left end surface of the reversing valve core;
the right end cover is arranged on the right side face of the valve body and used for respectively sealing a right opening of the first valve body through hole and a right opening of the second valve body through hole, a fourth oil port is formed in the side wall of the right end cover and communicated with the right opening of the first valve body through hole through a fourth flow passage, and a right control cavity is defined between the right end cover and the right end face of the reversing valve core;
the two-position two-way electromagnetic valve is arranged on the right end cover and is used for selectively connecting or disconnecting the fourth flow channel;
the spring seat is arranged in the blind hole of the left end cover and is sleeved on the left end of the reversing valve core, and the right side of the spring seat is stopped by the reversing valve core;
the spring seat sleeve is sleeved in the blind hole of the left end cover, sleeved on the left end of the reversing valve core and positioned on the left surface of the spring seat;
the check ring is fixedly sleeved on the left end of the reversing valve core so as to stop the right end of the spring seat sleeve on the left side;
the spring is sleeved on the spring seat sleeve, the left end of the spring abuts against the left end of the spring seat sleeve, the right end of the spring abuts against the spring seat, and the spring normally pushes the reversing valve core to the left so that the right end face of the reversing valve core is far away from the left end face of the right end cover;
the valve barrel, the valve barrel can be controlled and is established in the second valve body through-hole with moving, link up the valve barrel through-hole of valve barrel about having on the valve barrel, the intercommunication has on the lateral wall of valve barrel the first valve barrel through-hole and the second valve barrel through-hole, the intercommunication of interval arrangement about the valve barrel through-hole and the intercommunication of fifth valve body through-hole about the valve barrel through-hole and the third valve body through-hole and the fourth valve barrel through-hole of interval arrangement about the valve barrel through-hole, first valve barrel through-hole with the second valve barrel through-hole usually with the fourth valve body through-hole intercommunication, the third valve body through-hole with the fourth valve barrel through-hole usually with the sixth valve body through-hole intercommunication, the fifth valve barrel through-hole and the sixth valve barrel through-hole of interval arrangement about having on the valve barrel through-hole, the left end of valve barrel through-hole has left hole enlargement hole section and the right-end of valve barrel, the left hole expanding section is located on the left surface of the through hole of the first valve sleeve, the right hole expanding section is located on the right surface of the through hole of the fourth valve sleeve, a left feedback cavity is defined between the left end surface of the valve sleeve and the left end cover in the through hole of the second valve body, and a right feedback cavity is defined between the right end surface of the valve sleeve and the right end cover;
the left flow valve core is arranged in the valve sleeve through hole in a left-right moving mode, the left flow valve core is provided with a first blind hole with a left opening, a left flow valve core through groove is formed in the side wall of the left flow valve core, a first through hole for communicating the left flow valve core through groove with the first blind hole is formed in the left flow valve core through groove, the left end of the left flow valve core is provided with a left reducing section matched with the left expanding hole section, and a first throttling hole for communicating the valve sleeve through groove with the first blind hole is formed in the side wall of the right end of the left flow valve core;
the first left spring seat is sleeved on the left reducing section;
the second left spring seat is sleeved on the left reducing section and is positioned on the left surface of the first left spring seat;
the first left retainer ring is fixedly arranged on the left expanding hole section and is positioned on the left surface of the second left spring seat;
the second left retainer ring is fixedly arranged on the left reducing section and is positioned on the left surface of the second left spring seat;
the left spring is sleeved on the left reducing section, the right end of the left spring abuts against the first left spring seat so that the right end face of the first left spring seat always abuts against the step face of the left reducing section and the step face of the left expanding hole section, the left end of the left spring abuts against the second left spring seat so that the left end face of the second left spring seat always abuts against the first left retainer ring and the second left retainer ring, and at the moment, the left flow valve core through-flow groove is located between the first valve sleeve through-flow hole and the second valve sleeve through-flow hole and is closed by the valve sleeve;
the right flow valve core is arranged in the valve sleeve through hole in a left-right moving mode and is positioned on the right side of the left flow valve core, the right flow valve core is provided with a second blind hole with a right opening, a right flow valve core through groove is formed in the side wall of the right flow valve core, a second through hole for communicating the right flow valve core through groove with the second blind hole is formed in the right flow valve core through groove, the right end of the right flow valve core is provided with a right reducing section matched with the right expanding hole section, and a second throttling hole for communicating the valve sleeve through groove with the second blind hole is formed in the side wall of the left end of the right flow valve core;
the first right spring seat is sleeved on the right reducing section;
the second right spring seat is sleeved on the right reducing section and is positioned on the right surface of the first right spring seat;
the first right retainer ring is fixedly arranged on the right expanding hole section and is positioned on the right surface of the second right spring seat;
the second right retainer ring is fixedly arranged on the right reducing section and is positioned on the left surface of the second right spring seat;
the right spring is sleeved on the right reducing section, the left end of the right spring abuts against the first right spring seat so that the left end face of the first right spring seat always abuts against the step face of the right reducing section and the step face of the right expanding hole section, the right end of the right spring abuts against the second right spring seat so that the right end face of the second right spring seat always abuts against the first right retainer ring and the second right retainer ring, and at the moment, the right flow valve core through groove is positioned between the third valve sleeve through hole and the fourth valve sleeve through hole and is closed by the valve sleeve;
the diverter spool is switchable between a first position and a second position.
Advantageously, when the direction changing valve core is in the first position, the two-position two-way solenoid valve is electrified to conduct the fourth flow passage, the direction changing valve core moves from left to right against the action force of the spring to enable the right end of the direction changing valve core to be close to the right end cover, and at the moment, the direction changing valve core enables the first valve body flow through groove, the second valve body flow through groove and the third valve body flow through groove to be communicated.
Advantageously, when the direction change valve core is in the second position, the two-position two-way solenoid valve is de-energized to disconnect the fourth flow passage, and the spring pushes the direction change valve core to the right to make the right end face of the direction change valve core far away from the left end face of the right end cover, at this time, the direction change valve core disconnects the first valve body flow through groove from the second valve body flow through groove and disconnects the second valve body flow through groove from the third valve body flow through groove.
Advantageously, if oil flows from the first port to the second port and from the first port to the third port, the left flow valve core moves to the left with respect to the valve housing and the right flow valve core moves to the right with respect to the valve body.
Advantageously, if the pressure of the second port is greater than the pressure of the third port, the valve sleeve moves rightward relative to the valve body until the flow from the first port to the second port is equal to the flow from the first port to the third port.
Advantageously, if the pressure of the second port is lower than the pressure of the third port, the valve sleeve moves leftwards relative to the valve body until the flow from the first port to the second port is equal to the flow from the first port to the third port.
Advantageously, if oil flows from the second port to the first port and from the third port to the first port, the left flow valve spool moves to the right with respect to the valve housing and the right flow valve spool moves to the left with respect to the valve body.
Advantageously, if the pressure of the second port is greater than the pressure of the third port, the valve sleeve moves rightwards relative to the valve body until the flow of the second port from the third port to the first port is equal to the flow of the second port from the third port to the first port.
Advantageously, if the pressure of the second port is lower than the pressure of the third port, the valve sleeve moves leftwards relative to the valve body until the flow rate of the second port from the third port to the first port is equal to the flow rate of the second port from the third port to the first port.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a block diagram of an anti-skid control valve for an agricultural machine according to an embodiment of the present invention, in a free wheel control state;
FIG. 2 is a block diagram of a flow equalization valve assembly for an anti-skid control valve of an agricultural machine according to an embodiment of the present invention;
FIG. 3 is a hydraulic schematic of an anti-skid control valve for an agricultural machine according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an application scenario of an anti-slip control valve for an agricultural machine according to an embodiment of the present invention;
FIG. 5 is another block diagram of an anti-skid control valve for an agricultural machine in one position for anti-skid control according to an embodiment of the present invention;
FIG. 6 is another block diagram of an anti-skid control valve for an agricultural machine according to an embodiment of the present invention, shown in another position of anti-skid control.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
An anti-slip control valve for agricultural machinery according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 6, an anti-slip control valve for agricultural machinery according to an embodiment of the present invention includes: the valve comprises a valve body 2, a reversing valve core 6, a left end cover 1a, a right end cover 1b, a two-position two-way electromagnetic valve 10, a spring seat 12, a spring seat sleeve 11, a check ring 8e, a spring 7, a valve sleeve 5, a left flow valve core 4a, a first left spring seat 9a, a second left spring seat 9b, a first left check ring 8a, a second left check ring 8b, a left spring 3a, a right flow valve core 4b, a first right spring seat 9c, a second right spring seat 9d, a first right check ring 8c, a second right check ring 8d and a right spring 3 b.
The valve body 2 is provided with a first valve body through hole which penetrates the valve body 2 from left to right and a second valve body through hole which is positioned above the first valve body through hole and penetrates the valve body from left to right, the inner peripheral wall of the first valve body through hole is provided with a first valve body through flow groove 201, a second valve body through flow groove 202 and a third valve body through flow groove 203 which are arranged from left to right at intervals, the inner peripheral wall of the second valve body through hole is provided with a fourth valve body through flow groove 204, a fifth valve body through flow groove 205 and a sixth valve body through flow groove 206 which are arranged from left to right at intervals, the valve body 2 is provided with a first flow passage 207 which communicates the first valve body through flow groove 201 and the fourth valve body through flow groove 204, a second flow passage 208 which communicates the second valve body through flow groove 202 and the fifth valve body through flow groove 205 and a third flow passage 209 which communicates the third valve body through flow groove 203 and the sixth valve body through flow groove 206, the side wall of the valve body 2 is further provided with, the first port P communicates with the second valve body flow passage 202, the second port a communicates with the fourth valve body flow passage 204, and the third port B communicates with the sixth flow passage 206.
The reversing valve core 6 is arranged in the first valve body through hole in a left-right moving mode, a reversing valve core blind hole 61 with a left opening is formed in the reversing valve core 6, a reversing valve core through hole 62 for communicating the second valve body through groove 202 with the reversing valve core blind hole 61 is formed in the side wall of the reversing valve core 6, and a reversing valve core damping hole 63 for communicating the bottom of the reversing valve core blind hole 61 with the right end face of the reversing valve core 6 is formed in the right end of the reversing valve core 6.
The left end cover 1a is arranged on the left side surface of the valve body 2 and used for respectively sealing the left opening of the first valve body through hole and the left opening of the second valve body through hole, a left end cover blind hole 1a1 with an opening facing to the right and opposite to the left opening of the first valve body through hole is formed in the left end cover 1a, and a left control cavity 2c is defined between the left end cover 1a and the left end surface of the reversing valve core 6.
The right end cover 1b is arranged on the right side face of the valve body 2 and used for respectively sealing the right opening of the first valve body through hole and the right opening of the second valve body through hole, a fourth oil port T is formed in the side wall of the right end cover 1b and communicated with the right opening of the first valve body through hole through a fourth flow passage 1b1, and a right control cavity 2d is defined between the right end cover 1b and the right end face of the reversing valve core 6.
The two-position two-way solenoid valve 10 is provided on the right end cover 1b for selectively opening or closing the fourth flow passage 1b 1.
The spring seat 12 is arranged in the left end cover blind hole 1a1 and is sleeved on the left end of the reversing valve core 6, and the spring seat 12 is stopped by the reversing valve core 6 on the right side.
The spring seat sleeve 11 is arranged in the left end cover blind hole 1a1, sleeved on the left end of the reversing valve core 6 and positioned on the left surface of the spring seat 12.
The retainer ring 8e is fixedly sleeved on the left end of the reversing valve core 6 to stop the right end of the spring seat sleeve 12 at the left side.
The spring 7 is sleeved on the spring seat sleeve 11, the left end of the spring 7 abuts against the left end of the spring seat sleeve 11, the right end of the spring 7 abuts against the spring seat 12, and the spring 7 normally pushes the reversing valve core 6 to the left so that the right end face of the reversing valve core 6 is far away from the left end face of the right end cover 1 b.
The valve sleeve 5 is arranged in the second valve body through hole in a left-right moving mode, a valve sleeve through hole penetrating the valve sleeve 5 is arranged on the valve sleeve 5 in a left-right moving mode, a valve sleeve through hole 501 communicating the fifth valve body through hole 205 and a third valve body through hole 53 and a fourth valve sleeve through hole 54 communicating the valve sleeve through hole and arranged in a left-right moving mode at intervals are arranged on the side wall of the valve sleeve 5, the first valve sleeve through hole 51 and the second valve sleeve through hole 52 are normally communicated with the fourth valve body through hole 204, the third valve body through hole 53 and the fourth valve sleeve through hole 54 are normally communicated with the sixth valve body through hole 206, the fifth valve sleeve through hole 55 and the sixth valve sleeve through hole 56 arranged in a left-right moving mode are arranged on the valve sleeve through hole 501, the left end of the valve sleeve through hole has a left expanding hole section and the right end of the, the left hole expanding section is located on the left surface of the first valve sleeve through hole 51, the right hole expanding section is located on the right surface of the fourth valve sleeve through hole 54, a left feedback cavity 2a is defined between the left end surface of the valve sleeve 5 and the left end cover 7a in the second valve body through hole, and a right feedback cavity 2b is defined between the right end surface of the valve sleeve 5 and the right end cover 7 b.
The left flow valve core 4a is arranged in the valve sleeve through hole in a left-right moving mode, the left flow valve core 4a is provided with a first blind hole 4a2 with a left opening, the side wall of the left flow valve core 4a is provided with a left flow valve core through hole 4a4, the left flow valve core through hole 4a4 is provided with a first through hole 4a3 for communicating the left flow valve core through hole 4a4 with the first blind hole 4a2, the left end of the left flow valve core 4a is provided with a left reducing section matched with the left expanding hole section, and the side wall of the right end of the left flow valve core 4a is provided with a first throttling hole 4a1 for communicating the valve sleeve through hole 501 with the first blind hole 4a 2.
And a first left spring seat 9a is sleeved on the left reducing section.
And the second left spring seat 9b is sleeved on the left reducing section and is positioned on the left surface of the first left spring seat 9 a.
And the first left retainer ring 8a is fixedly arranged on the left expanding hole section and is positioned on the left surface of the second left spring seat 9 b.
And a second left retainer ring 8b is fixedly arranged on the left reducing section and is positioned on the left surface of the second left spring seat 9 b.
The left spring 3a is sleeved on the left reducing section, the right end of the left spring 3a abuts against the first left spring seat 9a so that the right end face of the first left spring seat 9a always abuts against the step face of the left reducing section and the step face of the left expanding hole section, the left end of the left spring 3a abuts against the second left spring seat 9b so that the left end face of the second left spring seat 9b always abuts against the first left retainer ring 8a and the second left retainer ring 8b, and at the moment, the left flow valve core flow passage 4a4 is located between the first valve sleeve flow passage 51 and the second valve sleeve flow passage 52 and is sealed by the valve sleeve 5.
The right flow valve core 4b is arranged in the valve sleeve through hole in a manner of moving left and right and is positioned at the right side of the left flow valve core 4 a. The right flow valve core 4b is provided with a second blind hole 4b2 with a right opening, the side wall of the right flow valve core 4b is provided with a right flow valve core through groove 4b4, the right flow valve core through groove 4b4 is provided with a second through hole 4b3 for communicating the right flow valve core through groove 4b4 and the second blind hole 4b2, the right end of the right flow valve core 4b is provided with a right reducing section matched with the right expanding hole section, and the side wall of the left end of the right flow valve core 4b is provided with a second throttling hole 4b1 for communicating the valve sleeve through groove 501 and the second blind hole 4b 2.
And a first right spring seat 9c is sleeved on the right reducing section.
And the second right spring seat 9d is sleeved on the right reducing section and is positioned on the right surface of the first right spring seat 9 c.
And the first right retainer ring 8c is fixedly arranged on the right diameter-expanding hole section and is positioned on the right surface of the second right spring seat 9 d.
And a second right retainer ring 8d is fixedly arranged on the right reducing section and is positioned on the right surface of the second right spring seat 9 d.
The right spring 3b is sleeved on the right reducing section, the left end of the right spring 3b abuts against the first right spring seat 9c so that the left end face of the first right spring seat 9c always abuts against the step face of the right reducing section and the step face of the right expanding hole section, the right end of the right spring 3b abuts against the second right spring seat 9db so that the right end face of the second right spring seat 9d always abuts against the first right retainer ring 8c and the second right retainer ring 8d, and at the moment, the right flow valve core flow passage 4b4 is located between the third valve sleeve flow passage hole 53 and the fourth valve sleeve flow passage hole 54 and is sealed by the valve sleeve 5.
The diverter spool 6 is switchable between a first position and a second position.
More specifically, when the direction change valve member 6 is in the first position, the two-position, two-way solenoid valve 10 is energized to communicate the fourth flow passage 1b1, and the direction change valve member 6 moves from left to right against the urging force of the spring 7 to bring the right end of the direction change valve member 6 close to the right end cap 1b, and at this time, the direction change valve member 6 brings the first valve body flow passage 201, the second valve body flow passage 202, and the third valve body flow passage 203 into communication. That is, the anti-slip control valve for an off-road vehicle according to the embodiment of the present invention has a "free wheel" function at this time.
When the direction change valve core 6 is at the second position, the two-position two-way solenoid valve 10 is de-energized to disconnect the fourth flow passage 1b1, the spring 7 pushes the direction change valve core 6 to the right to make the right end surface of the direction change valve core 6 far away from the left end surface of the right end cover 1b, and at this time, the direction change valve core 6 disconnects the first valve body flow passage 201 from the second valve body flow passage 202 and disconnects the second valve body flow passage 202 from the third valve body flow passage 203. That is, the anti-slip control valve for the off-road vehicle according to the embodiment of the present invention has the "anti-slip" function at this time.
When the valve is in the anti-slip function, if the oil flows from the first port P to the second port a and from the first port P to the third port B, the left flow valve core 4a moves leftward relative to the valve sleeve 5 and the right flow valve core 4B moves rightward relative to the valve sleeve 5. If the pressure of the second port a is greater than the pressure of the third port B, the valve sleeve 5 moves rightward relative to the valve body 2 until the flow from the first port P to the second port a is equal to the flow from the first port P to the third port B. If the pressure of the second port a is less than the pressure of the third port B, the valve sleeve 5 moves leftward relative to the valve body 2 until the flow rate from the first port P to the second port a is equal to the flow rate from the first port P to the third port B.
When the valve is in the anti-slip function, if the oil flows from the second port a to the first port P and from the third port B to the first port P, the left flow valve core 4a moves rightward relative to the valve sleeve 5 and the right flow valve core 4B moves leftward relative to the valve sleeve 5. If the pressure of the second port a is greater than the pressure of the third port B, the valve sleeve 5 moves rightward relative to the valve body 2 until the flow of the second port a from the third port to the first port is equal to the flow of the second port from the third port to the first port. If the pressure of the second port a is lower than the pressure of the third port B, the valve sleeve 5 moves leftward relative to the valve body 2 until the flow of the second port a from the third port B to the first port P is equal to the flow of the second port a from the third port B to the first port P.
In other words, the anti-slip control valve for the off-road vehicle according to the embodiment of the invention comprises a valve body 2, a reversing valve core 6, a spring 7, a left end cover 1a, a right end cover 1b, a two-position two-way electromagnetic valve 10 and a flow equalizing valve assembly.
The flow equalizing valve assembly comprises a valve sleeve 5, a left flow valve core 4a, a first left spring seat 9a, a second left spring seat 9b, a left spring 3a, a first left retainer ring 8a, a second left retainer ring 8b, a right flow valve core 4b, a first right spring seat 9c, a second right spring seat 9d, a right spring 3b, a first right retainer ring 8c and a second right retainer ring 8 d.
The two-position two-way solenoid valve 10 is used to selectively open or close the fourth flow passage 1b 1.
As shown in fig. 4, the first port P is connected to one port of the bidirectional closed hydraulic pump 15, the second port a and the third port B are respectively connected to one ports of the first traveling motor 13 and the second traveling motor 14, the other ports of the first traveling motor 13 and the second traveling motor 14 are connected to the other port of the bidirectional closed hydraulic pump 15, and the fourth port T is directly connected to the oil tank.
The invention has two functions of 'free wheel' and 'anti-slip'. The method comprises the following specific steps:
(1) when the agricultural machinery turns before entering a small-radius curve, the two-position two-way electromagnetic valve 10 is electrified to conduct the fourth flow passage 1b1, as shown in fig. 1, oil of a first oil port P enters the left control cavity 2c through the reversing valve core through hole 62 and the reversing valve core blind hole 61 and then enters the right control cavity 2d through the reversing valve core damping hole 63, as the two-position two-way electromagnetic valve 10 is electrified, the right control cavity 2d is communicated with the fourth oil port T, the pressure of the left control cavity 2c is greater than that of the right control cavity 2d, the reversing valve core 6 overcomes the acting force of the spring 7 under the action of the pressure difference of the reversing valve core and moves rightwards, the spring seat sleeve 11 is driven to move rightwards through the retaining ring 8e to work at the position shown in fig. 1, and at the moment, the second oil port A is directly communicated with the first oil port P through the fourth valve body through the flow groove 204, the first flow; the third port B is directly communicated with the first port P via a sixth valve body flow passage 206, a third flow passage 209, a third valve body flow passage 203, and a second valve body flow passage 202. No matter how the bidirectional closed hydraulic pump 15 turns, the first oil port P is directly communicated with the second oil port a and the third oil port B, so that the first traveling motor 13 and the second traveling motor 14 are in a free wheel state, the bidirectional closed hydraulic pump 15 provides flow according to the rotating speeds of the first traveling motor 13 and the second traveling motor 14, and the traveling motor on the outer side cannot drag and rotate.
(2) When the agricultural machine works in a paddy field, the two-position two-way electromagnetic valve 10 is powered off to disconnect the fourth flow channel 1b1, and one of the first walking motor 13 and the second walking motor 14 corresponding to the walking device is in a suspension slipping state, the anti-slipping function of the agricultural machine is realized. The method comprises the following specific steps:
because the two-position two-way solenoid valve 10 loses power, the pressures of the left control chamber 2c and the right control chamber 2d are equal, the reversing valve core 6 moves leftwards to the position shown in fig. 5 and 6 under the action of the spring 7, the communication between the first oil port P and the first valve body through flow groove 201 and the communication between the first oil port P and the third valve body through flow groove 203 are cut off, and the oil of the first oil port P can only be communicated with the second oil port a and the third oil port B through the flow balancing valve assembly.
If the two-way closed hydraulic pump 15 is in the forward rotation state that is the state of outputting the oil to the first port P, the oil of the first port P passes through the second flow passage 208, the fifth valve housing through-flow hole 55 and the sixth valve housing through-flow hole 56 and then enters the inner cavity of the valve housing 5, then the flow is divided into 2 paths, and the path enters a second oil port A after passing through a first throttling hole 4a1, a first blind hole 4a2, a first through flow hole 4a3, a left flow valve core through flow groove 4a4, a first valve sleeve through flow hole 51 and a second valve sleeve through flow hole 52, because the first throttle orifice 4a1 has a pressure difference between its front and rear sides, i.e., between the first port P and the left feedback chamber 2a, this pressure difference pushes the left flow spool 4a to move leftward against the action of the left spring 3a to the position shown in fig. 5, at which the second sleeve through-hole 52 is covered, and the first blind hole 4a2 can only communicate with the first sleeve through-hole 51 through the left flow spool through-groove 4a 4; the other path enters the third port B through the second throttle hole 4B1, the second blind hole 4B2, the second through-flow hole 4B3, the right flow valve core through-flow groove 4B4, the third valve sleeve through-flow hole 53 and the fourth valve sleeve through-flow hole 54, because the second throttle hole 4B1 acts to make a pressure difference before and after it, that is, a pressure difference exists between the first port P and the right feedback chamber 2B, the pressure difference pushes the right flow valve core 4B to move to the right to the position shown in fig. 5 against the action of the right spring 3B, at this time, the third valve sleeve through-flow hole 53 is covered, and the second blind hole 4B2 can only communicate with the fourth valve sleeve through-flow hole 54 through the right flow valve core through-flow groove 4B 4. At this time, if a slipping condition occurs, that is, one port of the second port a and the third port B has a lower load, if the pressure of the third port B is significantly lower than the pressure of the second port a, the pressure of the left feedback chamber 2a is greater than the pressure of the right feedback chamber 2B, the valve sleeve 5 moves rightward under the pressure difference between the left feedback chamber 2a and the right feedback chamber 2B, so that the communication area between the fourth valve sleeve through hole 54 and the fifth valve body through flow groove 205 is reduced, until the pressures of the left feedback chamber 2a and the right feedback chamber 2B are equal to reach a balanced state, and because the diameters of the first throttle hole 4a1 and the second throttle hole 4B1 are equal, the pressure difference between the front and the back of the first throttle hole 4a1 and the second throttle hole 4B1 is equal, the flow rates of the second port a and the third port B are equal, and the flow rate of the first port P cannot completely flow into the third port B to cause a slipping condition in the third traveling motor, the second travel motor 13 always has a flow rate flowing in to drive the travel. If the pressure of the second port A is obviously lower than that of the third port B, the working principle is similar.
If the two-way closed hydraulic pump 15 is in reverse rotation, that is, when the oil from the second oil port a and the third oil port B flows into the first oil port P, as shown in fig. 6, due to the action of the first throttle hole 4a1, a pressure difference exists between the left feedback chamber 2a and the first oil port P, the left flow valve core 4a moves to the right under the action of the pressure difference to close the first valve sleeve through hole 51, and the oil from the second oil port a can only be communicated with the left flow valve core through hole 4a4 through the second valve sleeve through hole 52; similarly, due to the action of the second orifice 4B1, a pressure difference exists between the right feedback chamber 2B and the first port P, the right flow valve core 4B moves to the right under the action of the pressure difference to close the fourth valve sleeve through-hole 54, and the oil of the third port B can only be communicated with the left flow valve core through-hole 4B4 through the third valve sleeve through-hole 53; at this time, if a slipping condition occurs, the corresponding port pressure is also high due to the large flow rate of the slipping traveling motor, and if the pressure of the third port B is significantly lower than the pressure of the second port a, the pressure of the left feedback chamber 2a is greater than the pressure of the right feedback chamber 2B, the valve sleeve 5 moves to the right under the pressure difference between the left feedback chamber 2a and the right feedback chamber 2B, so that the communication area between the second valve sleeve through hole 52 and the third valve body flow passage 203 is reduced, the flow rate flowing into the left feedback chamber 2a is reduced, the pressure of the left feedback chamber 2a is reduced, until the pressures of the left feedback chamber 2a and the right feedback chamber 2B are equal to reach a balanced state, and because the diameters of the first throttle hole 4a1 and the second throttle hole 4B1 are equal, the pressure difference between the first throttle hole 4a1 and the second throttle hole 4B1 is equal, the flow rates flowing into the first port P from the second port a and the third port B are equal, the flow will not flow into the second oil port a completely and enter the second traveling motor 13 to cause a slip condition, and the third traveling motor 14 always has the flow to flow into the driving traveling. If the pressure of the second port A is obviously lower than that of the third port B, the working principle is similar.
In conclusion, the invention can realize two functions of 'free wheel' and 'anti-slip' control, can realize the random switching of 2 functions by controlling the electrification and the power loss of the two-position two-way electromagnetic valve, has convenient control, can realize the anti-slip and can prevent the dragging phenomenon of turning by the free wheel function, has reasonable and simple structure and high cost performance.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although the embodiments of the present invention have been shown and described, it is understood that the embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the embodiments without departing from the scope of the present invention.
Claims (5)
1. A method of operating an anti-skid control valve for an agricultural machine, the control valve comprising:
the valve body, link up about having on the valve body the first valve body through-hole of valve body and being located link up about and above the first valve body through-hole the second valve body through-hole of valve body, first valve body through-flow groove, second valve body through-flow groove and third valve body through-flow groove from a left side to right interval arrangement have on the internal perisporium of first valve body through-hole, have on the internal perisporium of second valve body through-hole from a left side to right interval arrangement fourth valve body through-flow groove, fifth valve body through-flow groove and sixth valve body through-flow groove, have on the valve body and communicate the first runner of first valve body through-flow groove with fourth valve body through-flow groove, communicate the second runner of second valve body through-flow groove with fifth valve body through-flow groove and communicate the third runner of third valve body through-flow groove with the sixth valve body through-flow groove, still have on the lateral wall of valve body first hydraulic fluid port, The first oil port is communicated with the second valve body through flow groove, the second oil port is communicated with the fourth valve body through flow groove, and the third oil port is communicated with the sixth through flow groove;
the reversing valve core is arranged in the first valve body through hole in a left-right moving mode, a reversing valve core blind hole with a leftward opening is formed in the reversing valve core, a reversing valve core through hole for communicating the second valve body through flow groove with the reversing valve core blind hole is formed in the side wall of the reversing valve core, and a reversing valve core damping hole for communicating the bottom of the reversing valve core blind hole with the right end face of the reversing valve core is formed in the right end of the reversing valve core;
the left end cover is arranged on the left side surface of the valve body and used for respectively sealing a left opening of the first valve body through hole and a left opening of the second valve body through hole, a left end cover blind hole with a right opening and opposite to the left opening of the first valve body through hole is formed in the left end cover, and a left control cavity is defined between the left end cover and the left end surface of the reversing valve core;
the right end cover is arranged on the right side face of the valve body and used for respectively sealing a right opening of the first valve body through hole and a right opening of the second valve body through hole, a fourth oil port is formed in the side wall of the right end cover and communicated with the right opening of the first valve body through hole through a fourth flow passage, and a right control cavity is defined between the right end cover and the right end face of the reversing valve core;
the two-position two-way electromagnetic valve is arranged on the right end cover and is used for selectively connecting or disconnecting the fourth flow channel;
the spring seat is arranged in the blind hole of the left end cover and is sleeved on the left end of the reversing valve core, and the right side of the spring seat is stopped by the reversing valve core;
the spring seat sleeve is sleeved in the blind hole of the left end cover, sleeved on the left end of the reversing valve core and positioned on the left surface of the spring seat;
the check ring is fixedly sleeved on the left end of the reversing valve core so as to stop the right end of the spring seat sleeve on the left side;
the spring is sleeved on the spring seat sleeve, the left end of the spring abuts against the left end of the spring seat sleeve, the right end of the spring abuts against the spring seat, and the spring normally pushes the reversing valve core to the left so that the right end face of the reversing valve core is far away from the left end face of the right end cover;
the valve barrel, the valve barrel can be controlled and is established in the second valve body through-hole with moving, link up the valve barrel through-hole of valve barrel about having on the valve barrel, the intercommunication has on the lateral wall of valve barrel the first valve barrel through-hole and the second valve barrel through-hole, the intercommunication of interval arrangement about the valve barrel through-hole and the intercommunication of fifth valve body through-hole about the valve barrel through-hole and the third valve body through-hole and the fourth valve barrel through-hole of interval arrangement about the valve barrel through-hole, first valve barrel through-hole with the second valve barrel through-hole usually with the fourth valve body through-hole intercommunication, the third valve body through-hole with the fourth valve barrel through-hole usually with the sixth valve body through-hole intercommunication, the fifth valve barrel through-hole and the sixth valve barrel through-hole of interval arrangement about having on the valve barrel through-hole, the left end of valve barrel through-hole has left hole enlargement hole section and the right-end of valve barrel, the left hole expanding section is located on the left surface of the through hole of the first valve sleeve, the right hole expanding section is located on the right surface of the through hole of the fourth valve sleeve, a left feedback cavity is defined between the left end surface of the valve sleeve and the left end cover in the through hole of the second valve body, and a right feedback cavity is defined between the right end surface of the valve sleeve and the right end cover;
the left flow valve core is arranged in the valve sleeve through hole in a left-right moving mode, the left flow valve core is provided with a first blind hole with a left opening, a left flow valve core through groove is formed in the side wall of the left flow valve core, a first through hole for communicating the left flow valve core through groove with the first blind hole is formed in the left flow valve core through groove, the left end of the left flow valve core is provided with a left reducing section matched with the left expanding hole section, and a first throttling hole for communicating the valve sleeve through groove with the first blind hole is formed in the side wall of the right end of the left flow valve core;
the first left spring seat is sleeved on the left reducing section;
the second left spring seat is sleeved on the left reducing section and is positioned on the left surface of the first left spring seat;
the first left retainer ring is fixedly arranged on the left expanding hole section and is positioned on the left surface of the second left spring seat;
the second left retainer ring is fixedly arranged on the left reducing section and is positioned on the left surface of the second left spring seat;
the left spring is sleeved on the left reducing section, the right end of the left spring abuts against the first left spring seat so that the right end face of the first left spring seat always abuts against the step face of the left reducing section and the step face of the left expanding hole section, the left end of the left spring abuts against the second left spring seat so that the left end face of the second left spring seat always abuts against the first left retainer ring and the second left retainer ring, and at the moment, the left flow valve core through-flow groove is located between the first valve sleeve through-flow hole and the second valve sleeve through-flow hole and is closed by the valve sleeve;
the right flow valve core is arranged in the valve sleeve through hole in a left-right moving mode and is positioned on the right side of the left flow valve core, the right flow valve core is provided with a second blind hole with a right opening, a right flow valve core through groove is formed in the side wall of the right flow valve core, a second through hole for communicating the right flow valve core through groove with the second blind hole is formed in the right flow valve core through groove, the right end of the right flow valve core is provided with a right reducing section matched with the right expanding hole section, and a second throttling hole for communicating the valve sleeve through groove with the second blind hole is formed in the side wall of the left end of the right flow valve core;
the first right spring seat is sleeved on the right reducing section;
the second right spring seat is sleeved on the right reducing section and is positioned on the right surface of the first right spring seat;
the first right retainer ring is fixedly arranged on the right expanding hole section and is positioned on the right surface of the second right spring seat;
the second right retainer ring is fixedly arranged on the right reducing section and is positioned on the left surface of the second right spring seat;
the right spring is sleeved on the right reducing section, the left end of the right spring abuts against the first right spring seat so that the left end face of the first right spring seat always abuts against the step face of the right reducing section and the step face of the right expanding hole section, the right end of the right spring abuts against the second right spring seat so that the right end face of the second right spring seat always abuts against the first right retainer ring and the second right retainer ring, and at the moment, the right flow valve core through groove is positioned between the third valve sleeve through hole and the fourth valve sleeve through hole and is closed by the valve sleeve; the reversing valve core is switchable between a first position and a second position;
the working method comprises the following steps: when the reversing valve core is located at the first position, the two-position two-way electromagnetic valve is electrified to conduct the fourth flow channel, the reversing valve core overcomes the acting force of the spring to move from left to right so that the right end of the reversing valve core is close to the right end cover, and at the moment, the reversing valve core enables the first valve body through flow groove, the second valve body through flow groove and the third valve body through flow groove to be communicated.
2. The method of claim 1, wherein when the diverter spool is in the second position, the two-position, two-way solenoid valve is de-energized to disconnect the fourth flow path, and the spring urges the diverter spool to the right to move the right end face of the diverter spool away from the left end face of the right end cap, at which time the diverter spool disconnects the first valve body flow passage from the second valve body flow passage and disconnects the second valve body flow passage from the third valve body flow passage.
3. The method of operation of claim 1 wherein if oil flows from the first port to the second port and from the first port to the third port, the left flow valve core moves to the left with respect to the valve housing and the right flow valve core moves to the right with respect to the valve housing.
4. The method of operation of claim 1 wherein if the pressure of the second port is greater than the pressure of the third port, the valve sleeve moves rightward relative to the valve body until the flow from the first port to the second port is equal to the flow from the first port to the third port.
5. The method of operation of claim 1 wherein if the pressure of the second port is less than the pressure of the third port, the valve sleeve moves leftward relative to the valve body until the flow from the first port to the second port is equal to the flow from the first port to the third port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911161228.8A CN110701128A (en) | 2018-08-27 | 2018-08-27 | Control valve and working method thereof |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911161228.8A CN110701128A (en) | 2018-08-27 | 2018-08-27 | Control valve and working method thereof |
| CN201810981942.0A CN109058200B (en) | 2018-08-27 | 2018-08-27 | Anti-slip control valve for agricultural machinery |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810981942.0A Division CN109058200B (en) | 2018-08-27 | 2018-08-27 | Anti-slip control valve for agricultural machinery |
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| CN110701128A true CN110701128A (en) | 2020-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810981942.0A Active CN109058200B (en) | 2018-08-27 | 2018-08-27 | Anti-slip control valve for agricultural machinery |
| CN201911161228.8A Pending CN110701128A (en) | 2018-08-27 | 2018-08-27 | Control valve and working method thereof |
| CN201911161227.3A Pending CN111188804A (en) | 2018-08-27 | 2018-08-27 | Valve body and control valve using same |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810981942.0A Active CN109058200B (en) | 2018-08-27 | 2018-08-27 | Anti-slip control valve for agricultural machinery |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911161227.3A Pending CN111188804A (en) | 2018-08-27 | 2018-08-27 | Valve body and control valve using same |
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| CN (3) | CN109058200B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2217575B1 (en) * | 1973-02-08 | 1976-05-14 | Dba | |
| CN204715185U (en) * | 2015-03-31 | 2015-10-21 | 徐州徐工筑路机械有限公司 | Road milling machinery walking hydraulic-driven anti-slip system |
| CN105545841B (en) * | 2016-01-29 | 2017-04-05 | 山东卫士植保机械有限公司 | A kind of anti-slip hydraulic system for being suitable to paddy-field-working |
| CN105508323B (en) * | 2016-02-25 | 2018-04-06 | 九方泰禾国际重工(青岛)股份有限公司 | Self propelled harvester hydraulic pressure four-wheel drive shoe |
| CN106224318B (en) * | 2016-09-13 | 2018-01-12 | 九方泰禾国际重工(青岛)股份有限公司 | Off roader hydraulic pressure four-wheel drive HYDRAULIC CONTROL SYSTEM valve group |
-
2018
- 2018-08-27 CN CN201810981942.0A patent/CN109058200B/en active Active
- 2018-08-27 CN CN201911161228.8A patent/CN110701128A/en active Pending
- 2018-08-27 CN CN201911161227.3A patent/CN111188804A/en active Pending
Also Published As
| Publication number | Publication date |
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| CN109058200A (en) | 2018-12-21 |
| CN109058200B (en) | 2019-12-24 |
| CN111188804A (en) | 2020-05-22 |
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Application publication date: 20200117 |