CN111237503A - Fully-stable three-position four-way rotary reversing valve and working position switching method thereof - Google Patents
Fully-stable three-position four-way rotary reversing valve and working position switching method thereof Download PDFInfo
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- CN111237503A CN111237503A CN202010159003.5A CN202010159003A CN111237503A CN 111237503 A CN111237503 A CN 111237503A CN 202010159003 A CN202010159003 A CN 202010159003A CN 111237503 A CN111237503 A CN 111237503A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 9
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
- F16K11/085—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/065—Construction of housing; Use of materials therefor of taps or cocks with cylindrical plugs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/041—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves
- F16K31/043—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
- F16K31/54—Mechanical actuating means with toothed gearing with pinion and rack
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0058—Optical means, e.g. light transmission, observation ports
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention discloses a fully-stable three-position four-way rotary reversing valve and a working position switching method thereof. For the reversing valve, three or more than three working positions are often needed to meet the use requirement. The invention relates to a fully-stable three-position four-way rotary reversing valve which comprises a valve seat, a valve core and a working position indicating assembly. The valve seat comprises a first oil port disc, a second oil port disc, an outer cylinder body and an insulating pad cylinder. The valve core is arranged in the insulating pad cylinder. The case is cylindricly, and radial through-flow groove has all been seted up to both ends terminal surface. The two radial through-flow slots are aligned with each other. The valve core is provided with axial through flow holes which are arranged in a centering way and are arranged at two sides of the central axis of the valve core. The work position indicating assembly comprises a battery, three indicating lamps, two spring pins and six conical contact pieces. In the invention, the power is needed to be supplied to consume energy only when the working positions are switched, and the electric energy is not consumed in other time, so that all the working positions are stable working positions, the use cost of the invention is greatly reduced, and the service life of the invention is prolonged.
Description
Technical Field
The invention belongs to the technical field of electromagnetic valves, and particularly relates to a fully-stable three-position four-way rotary reversing valve and a working position switching method thereof.
Background
In the existing four-way electromagnetic directional valve, the working position of the valve core is adjusted by sliding, and the complex processing cost of the valve core is high. In addition, the existing electromagnetic directional valve only has a stable working position which does not need to consume electric energy, and when the electromagnetic directional valve is in an unstable working position, the electromagnet needs to be continuously electrified to consume the electric energy, so that the use cost of the electromagnetic directional valve is greatly improved. Although existing bistable electromagnetic fluxgate valves can have two stable operating positions; however, for the reversing valve, three or more working positions are often needed to meet the use requirement. Therefore, it is important to design a reversing valve with all the working positions being stable working positions.
Disclosure of Invention
The invention aims to provide a fully-stable three-position four-way rotary reversing valve and a working position switching method thereof.
The invention relates to a fully-stable three-position four-way rotary reversing valve which comprises a valve seat, a valve core and a working position indicating assembly. The valve seat comprises a first oil port disc, a second oil port disc, an outer cylinder body and an insulating pad cylinder. The first oil port disc and the second oil port disc are respectively fixed at two ends of the inner cavity of the outer cylinder body. The insulating pad cylinder is fixedly arranged in the outer cylinder body and is positioned on the first oil port disc and the second oil port disc. An oil inlet P and a first working oil port A are formed in the first oil port disc; the second oil port disc is provided with an oil return port T and a second working oil port B. The valve core is arranged in the insulating pad cylinder. The case is cylindricly, and radial through-flow groove has all been seted up to both ends terminal surface. The two radial through-flow slots are aligned with each other. The valve core is provided with axial through flow holes which are arranged in a centering way and are arranged at two sides of the central axis of the valve core. An oil inlet P and a second working oil port B on the first oil port disc are arranged on two sides of the central axis of the valve core in a centering mode. And an oil return port T on the second oil port disc and the first working oil port A are arranged on two sides of the central axis of the valve core in a centering manner.
The valve core and the valve seat have three different working positions which are respectively as follows:
(1) the oil inlet P → a radial through flow groove close to the first oil port disc → a first working oil port A; the second working port B → the radial through-flow groove adjacent to the second port disc → the oil return port T.
(2) Oil inlet P → first axial through hole → second working oil port B; first working port a → second axial through-flow hole → oil return port T.
(3) Each radial through flow groove and each axial through flow hole are staggered with each oil port on the valve seat, so that the oil inlet P, the oil return port T, the first working oil port A and the second working oil port B are all cut off.
Six locking grooves which are uniformly distributed along the circumferential direction of the axis of the insulating pad cylinder are formed in the inner side surface of the insulating pad cylinder. The locking groove is conical. Two elastic needle placing grooves which are arranged along the radial direction are arranged on the side surface of the valve core. The two elastic needle placing grooves are arranged on two sides of the central axis of the valve core in a centering way. The work position indicating assembly comprises a battery, three indicating lamps, two spring pins and six conical contact pieces. Six conical contact pieces are respectively arranged in six locking grooves of the insulating pad cylinder. The two spring pins are respectively arranged in the two spring pin arranging grooves of the valve core. And the two spring pins are electrically connected. Two conical contact blades which are opposite to each other in the six conical contact blades form a group to form three contact blade groups. The three contact pieces correspond to the three indicator lights respectively. One conical contact piece of each of the three contact piece sets is electrically connected with the positive electrode of the battery, and the other conical contact piece of each of the three contact piece sets is electrically connected with the positive electrodes of the three indicating lamps respectively. The cathodes of the three indicator lights are all electrically connected to the negative pole of the battery.
Preferably, the anodes of the three indicator lamps are respectively led out with a signal wire; the three led-out signal wires are connected to a controller.
Preferably, the valve body is driven by a working position switching mechanism. The working position switching mechanism is arranged on the first oil port disc and comprises an electromagnetic push rod, a rack, a gear and a one-way bearing. The outer end of the transmission shaft extends out of the first oil port disc. The gear is supported at the outer end of the transmission shaft through a one-way bearing. The electromagnetic push rod is fixed on the first oil port disc, and the push rod is fixed with the rack. The rack is meshed with the gear. In the process that the push-out rod of the electromagnetic push rod moves from the inner limit position to the outer limit position, the gear rotates by 60 degrees.
Preferably, the valve core is driven by a motor or a steering engine; the specific driving structure is as follows: a key groove is formed in the center of the radial through groove, close to the first oil port disc, of the valve core. One end of the transmission shaft is connected with the key groove through a key, and the other end of the transmission shaft is connected with an output shaft of the motor or the steering engine through a coupler. The motor is installed on first oil port dish. And a sealing ring is arranged at the joint of the transmission shaft and the oil port disc.
Preferably, annular grooves are formed in the oil inlet P on the inner side surface of the first oil port disc, the first working oil port A, the oil return port T on the inner side surface of the second oil port disc and the second working oil port B. O-shaped sealing rings are embedded in the four annular grooves. The four O-shaped sealing rings respectively encircle the oil inlet P, the second working oil port B, the oil return port T and the first working oil port A and are in contact with the end face of the valve core.
Preferably, the plane passing through the axes of the two axial through-flow holes forms an angle of 60 degrees with the length direction of the radial through-flow groove.
Preferably, the distances from the central axes of the oil inlet P, the first working oil port A, the second working oil port B and the oil return port T to the central axis of the valve core are equal to the distance from the axial through-flow hole axis to the central axis of the valve core.
The working position switching method of the fully-stable three-position four-way rotary reversing valve comprises the following specific steps:
in an initial state, the valve core is positioned on one working position, the two spring needles respectively prop against two conical contact pieces belonging to the same contact piece, and one indicator light is lightened. When the valve core needs to be switched to different working positions, the valve core is driven to rotate, so that the valve core is switched to the required position. The controller judges whether the valve core reaches any working position according to whether any one of the three signal lines outputs high level. The controller judges which working position the valve core is in according to which signal line outputs high level.
The invention has the beneficial effects that:
1. the valve core is switched by rotation, the basic requirements of the three-position four-way reversing valve are met only by arranging two square grooves and two through holes on one disc, the structure is simple and compact, and the cost of the three-position four-way valve is greatly reduced.
2. The motor, the steering engine or the electromagnetic push rod serving as power sources need to be electrified to consume energy only when the working positions are switched, and electric energy is not consumed in other time, so that all the working positions are stable working positions, the use cost of the device is greatly reduced, and the service life of the device is prolonged.
3. The invention realizes the automatic switching of the working position indicating assembly by utilizing the rotation of the valve core, realizes the lighting of different indicating lamps and provides visual feedback for users; in addition, the working position indicating assembly automatically sends a signal to the controller when the valve core is in place, so that the requirement of the power element on the precision is reduced.
4. In the embodiment 2 of the invention, the electromagnetic push rod, the one-way bearing and the gear rack are matched, and the continuous switching of the working position of the valve core can be realized only by switching on and off the electromagnetic push rod, so that the control difficulty and the cost of the invention are greatly reduced.
Drawings
FIG. 1 is a schematic view of the entire structure of embodiment 1;
fig. 2 is a perspective view of a valve cartridge in embodiment 1;
FIG. 3 is a schematic radial cross-section of the embodiment 1 in a first working position;
FIG. 4 is a schematic radial cross-section of example 1 in a second operating position;
FIG. 5 is a schematic radial cross-section of the embodiment 1 in a third operating position;
FIG. 6 is a schematic axial sectional view of example 1;
FIG. 7 is a schematic circuit diagram of an operation bit indicating device in embodiment 1;
fig. 8 is a schematic structural diagram of the operating position switching mechanism in embodiment 2.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1 and 3, the fully steady state three-position four-way rotary reversing valve comprises a valve seat, a valve core 5 and a working position indicating assembly. The valve seat comprises a first oil port disc 1, a second oil port disc 2, an outer cylinder body 3 and an insulating pad cylinder 4. The first oil port disc 1 and the second oil port disc 2 are respectively fixed at two ends of the inner cavity of the outer cylinder body 3. The insulating pad cylinder 4 is fixedly arranged in the outer cylinder body 3 and is positioned on the first oil port disc 1 and the second oil port disc 2. An insulating sleeve gasket 4 can be used to define the spacing between the first port plate 1 and the second port plate 2. An oil inlet P and a first working oil port A are formed in the first oil port disc 1; the second oil port disc 2 is provided with an oil return port T and a second working oil port B.
As shown in fig. 2, the valve element 5 is disposed in the insulating sleeve 4. The outer side wall of the valve core 5 and the inner side wall of the insulating pad cylinder 4 form a revolute pair. The valve core 5 is cylindrical, and the end faces of two ends are both provided with radial through flow grooves 5-1. The two radial through grooves 5-1 are aligned with each other and are respectively used for guiding oil input into the oil inlet P to the first working oil port A and guiding oil input into the second working oil port B to the oil return port T. The valve core 5 is provided with axial through flow holes 5-2 which are arranged in a centering way and are arranged at two sides of the central axis of the valve core. The two axial through flow holes 5-2 are respectively used for guiding oil input into the oil inlet P to the second working oil port B and guiding oil input into the first working oil port A to the oil return port T. Meanwhile, the plane passing through the axes of the two axial through-flow holes 5-2 forms an included angle of 60 degrees with the length direction of the radial through-flow groove 5-1.
An oil inlet P and a second working oil port B on the first oil port disc 1 are arranged on two sides of the central axis of the valve core 5 in a centering mode. And an oil return port T on the second oil port disc 2 and the first working oil port A are arranged on two sides of the central axis of the valve core 5 in a centering way. The distances from the central axes of the oil inlet P, the first working oil port A, the second working oil port B and the oil return port T to the central axis of the valve core 5 are equal to the distance from the axis of the axial through flow hole 5-2 to the central axis of the valve core 5. Annular grooves are formed in the oil inlet P on the inner side surface of the first oil port disc 1, the first working oil port A, the oil return port T on the inner side surface of the second oil port disc 2 and the second working oil port B. O-shaped sealing rings 12 are embedded in the four annular grooves. The four O-ring seals 12 respectively encircle the oil inlet P, the second working oil port B, the oil return port T and the first working oil port a, and are in contact with the end face of the valve core 5, so as to prevent liquid leakage between the oil inlet P, the second working oil port B, the oil return port T, the first working oil port a and the valve core 5.
The valve core 5 and the valve seat have three different working positions, and the three working positions are switched by rotating the valve core 5; one transposition cycle of the valve core 5 is 180 degrees, namely the working position reached when the valve core 5 rotates 180 degrees in one direction is the same as that before the rotation.
The connection relation of oil ports corresponding to the three working positions is as follows:
(1) as shown in fig. 3, two ends of the radial through flow groove 5-1 are connected with the corresponding oil ports in an aligned manner; the following oil liquid circulation sequence is realized: the oil inlet P → the radial through flow groove 5-1 which is close to the first oil port disc → the first working oil port A; the second working oil port B → the radial through-flow groove 5-1 adjacent to the second oil port disc → the oil return port T. At the moment, the first working oil port A outputs the hydraulic medium to drive the oil cylinder, and the second working oil port B returns the hydraulic medium to drive the oil cylinder.
(2) As shown in fig. 4, the axial through-flow holes 5-2 are aligned with the corresponding oil ports; the following oil liquid circulation sequence is realized: the oil inlet P → the first axial through hole 5-2 → the second working oil port B; the first working port a → the second axial through-flow hole 5-2 → the oil return port T. At the moment, the second working oil port B outputs the hydraulic medium, and the first working oil port A returns the hydraulic medium.
(3) As shown in fig. 5, each radial through flow groove 5-1 and each axial through flow hole 5-2 are staggered with each oil port on the valve seat; the oil inlet P, the oil return port T, the first working oil port A and the second working oil port B are all cut off, the middle position state of the O-shaped three-position four-way reversing valve is presented, the piston rod of the oil cylinder is locked, the pump is not unloaded, and the system maintains pressure.
As shown in fig. 6, six locking grooves 4-1 are formed in the middle of the inner side surface of the insulating pad cylinder 4 and are uniformly distributed along the circumferential direction of the axis of the insulating pad cylinder. The locking groove is conical, so that the spring needle 8 is positioned. Two elastic needle placing grooves 5-3 which are arranged along the radial direction are arranged on the side surface of the valve core 5. The two elastic needle placing grooves 5-3 are arranged on two sides of the central axis of the valve core 5 in a centering way. The spring pin placing groove 5-3 is axially aligned with each locking groove 4-1 on the insulating pad cylinder 4.
As shown in fig. 6 and 7, the working position indicating assembly includes a battery 6, three indicator lights 7, two pogo pins 8, and six conical contacts 9. The six conical contact pieces are respectively arranged in six locking grooves 4-1 of the insulating pad cylinder 4. The six conical contact pieces are respectively connected out through the conducting wires 10. The two spring pins 8 are respectively arranged in the two spring pin arranging grooves 5-3 of the valve core 5. The two spring pins 8 are electrically connected with each other in a manner of connecting through a wire by using the valve core 5 which is electrically conductive. When the valve core 5 is at different working positions, the two spring needles 8 prop against the two different locking grooves 4-12-4 (the six locking grooves 4-12-4 are grouped in pairs and correspond to three working positions).
The battery 6 and the three indicator lights 7 are all mounted on the outer side of the valve seat. Two conical contact blades which are opposite to each other in the six conical contact blades 9 form a group to form three contact blade groups. The three contact pieces correspond to the three indicator lights 7, respectively. One conical contact piece 9 of each of the three contact piece groups is electrically connected with the positive electrode of the battery 6, and the other conical contact piece of each of the three contact piece groups is electrically connected with the positive electrodes of the three indicator lights 7 respectively. The cathodes of the three indicator lights 7 are all electrically connected to the negative pole of the battery 6. The two conical contact pieces which are opposite to each other are respectively propped against by the two spring pins 8, and the two conical contact pieces are communicated with each other, so that the corresponding indicator light 7 is lightened. Therefore, when the valve core 5 rotates to different working positions, different indicator lights 7 are lighted because the two spring pins 8 are communicated with different contact sets, so that an operator can know which working position the valve core 5 is currently in.
The anodes of the three indicator lights 7 are respectively led out with a signal line (P0, P1, P2); the three led-out signal wires are connected to a controller. The controller adopts a singlechip. The controller judges whether the valve core 5 reaches any working position according to whether any one of the three signal lines outputs high level. The controller determines which operating position the spool 5 is in according to which signal line outputs the high level. Therefore, even if the precision of the motor 10 or the steering engine is matched, the controller can also ensure the accurate switching of the working positions according to the signals fed back by the three signal lines, and the conical locking groove 4-1 can realize the accurate positioning of the valve core 5.
The valve core 5 is driven by a motor 10 or a steering engine; the specific driving structure is as follows: a key groove 5-4 is arranged at the central position of a radial through flow groove 5-1 on the valve core 5, which is close to the first oil port disc. The key slot 5-4 is a blind slot (i.e. a non-through slot) to avoid leakage between the two radial through slots 5-1. One end of the transmission shaft 11 is connected with the key groove 5-4 through a key, and the other end of the transmission shaft is connected with the output shaft of the motor 10 or the steering engine through a coupler. The motor 10 is mounted on the first port plate. The junction of transmission shaft 11 and hydraulic fluid port dish is provided with the sealing washer to avoid the seepage of fluid.
The working position switching method of the fully-stable three-position four-way rotary reversing valve comprises the following specific steps:
in an initial state, the valve core 5 is located at one working position, the two spring needles 8 respectively abut against two conical contact pieces belonging to the same contact piece, and one indicator light 7 is lightened. When different working positions need to be switched, the motor 10 or the steering engine drives the valve core 5 to rotate, so that the valve core 5 is switched to the required position. The controller judges whether the valve core 5 reaches any working position according to whether any one of the three signal lines outputs high level. The controller determines which operating position the spool 5 is in according to which signal line outputs the high level.
Example 2
As shown in fig. 8, the present embodiment is different from embodiment 1 in that: the valve core 5 is not driven by the motor 10 or the steering engine, but driven by the working position switching mechanism.
The working position switching mechanism is arranged on the first oil port disc and comprises an electromagnetic push rod 13, a rack 14, a gear 15 and a one-way bearing 3-3. The outer end of the transmission shaft 11 of the valve core 5 can be driven to extend out of the first oil port plate. A gear 15 is supported at the outer end of the drive shaft 11 by means of one-way bearings 3-3. The electromagnetic push rod 13 is fixed on the first oil port disc, and the push rod is fixed with the rack 14. The rack 14 is engaged with a gear 15. In the process that the push-out rod of the electromagnetic push rod 13 moves from the inner limit position to the outer limit position, the gear 15 rotates by 60 degrees. When the electromagnetic push rod 13 is pushed out or retracted, the driving gear 15 is rotated forwards or reversely; because the outer ring and the inner ring of the one-way bearing 3-3 can only relatively rotate along one direction; therefore, the gear 15 rotates back and forth once to drive the valve core 5 of the transmission shaft 11 to rotate 60 degrees in one direction, so that the valve core 5 is switched from one working position to another working position; therefore, the switching of the working position of the valve core 5 can be realized by the pushing out and the retracting of the electromagnetic push rod 13.
The working position switching method of the fully-stable three-position four-way rotary reversing valve comprises the following steps:
step one, the electromagnetic push rod is pushed out, the rack 14 moves outwards, the gear 15 is driven to rotate forwards by 60 degrees, in the rotating direction, the outer ring and the inner ring of the one-way bearing 3-3 cannot rotate relatively, the valve core 5 rotates by 60 degrees along with the gear 15, and the valve core 5 is switched from one working position to another adjacent working position.
And step two, retracting the electromagnetic push rod, moving the rack 14 inwards, driving the gear 15 to rotate in the reverse direction by 60 degrees, and enabling the outer ring and the inner ring of the one-way bearing 3-3 to rotate relatively in the rotating direction. The valve core 5 is subjected to the rotation resistance of the spring needle 8, so that the inner ring does not rotate and the valve core 5 keeps static in the process of rotating the outer ring of the one-way bearing 3-3.
The continuous switching of the working positions of the valve core 5 can be repeatedly realized by repeatedly executing the first step and the second step, so that the valve core 5 can be switched to any one working position by controlling the push-pull times of the electromagnetic push rod.
Example 3
This example differs from example 1 or 2 in that: the transmission shaft 11 penetrates through the valve core and is connected to the second oil port disc, and forms a rotating pair. And a sealing ring is arranged at the joint of the transmission shaft 11 and the valve core.
Claims (8)
1. The fully-stable three-position four-way rotary reversing valve comprises a valve seat, a valve core and a working position indicating assembly; the method is characterized in that: the valve seat comprises a first oil port disc, a second oil port disc, an outer cylinder body and an insulating pad cylinder; the first oil port disc and the second oil port disc are respectively fixed at two ends of the inner cavity of the outer cylinder body; the insulating pad cylinder is fixedly arranged in the outer cylinder body and is positioned on the first oil port disc and the second oil port disc; an oil inlet P and a first working oil port A are formed in the first oil port disc; the second oil port disc is provided with an oil return port T and a second working oil port B; the valve core is arranged in the insulating pad cylinder; the valve core is cylindrical, and the end faces of two ends are provided with radial through flow grooves; the two radial through-flow slots are aligned with each other; the valve core is provided with axial through flow holes which are arranged in a centering way and are arranged at two sides of the central axis of the valve core; an oil inlet P on the first oil port disc and a second working oil port B are arranged on two sides of the central axis of the valve core in a centering manner; an oil return port T on the second oil port disc and the first working oil port A are arranged on two sides of the central axis of the valve core in a centering manner;
the valve core and the valve seat have three different working positions which are respectively as follows:
(1) the oil inlet P → a radial through flow groove close to the first oil port disc → a first working oil port A; the second working oil port B → a radial through flow groove close to the second oil port disc → an oil return port T;
(2) oil inlet P → first axial through hole → second working oil port B; the first working oil port A → the second axial through flow hole → the oil return port T;
(3) each radial through flow groove and each axial through flow hole are staggered with each oil port on the valve seat, so that the oil inlet P, the oil return port T, the first working oil port A and the second working oil port B are all cut off;
six locking grooves which are uniformly distributed along the circumferential direction of the axis of the insulating pad cylinder are formed in the inner side surface of the insulating pad cylinder; the locking groove is conical; two elastic needle placing grooves which are arranged along the radial direction are formed in the side surface of the valve core; the two elastic needle placing grooves are arranged on two sides of the central axis of the valve core in a centering way; the working position indicating assembly comprises a battery, three indicating lamps, two spring pins and six conical contact pieces; the six conical contact pieces are respectively arranged in the six locking grooves of the insulating pad cylinder; the two spring pins are respectively arranged in the two spring pin arranging grooves of the valve core; the two spring pins are electrically connected; two conical contact pieces which are opposite to each other in the six conical contact pieces form a group to form three contact piece groups; the three contact pieces correspond to the three indicator lamps respectively; one conical contact piece of each of the three contact piece groups is electrically connected with the positive electrode of the battery, and the other conical contact piece of each of the three contact piece groups is electrically connected with the positive electrodes of the three indicating lamps respectively; the cathodes of the three indicator lights are all electrically connected to the negative pole of the battery.
2. The fully steady state three-position four-way rotary reversing valve of claim 1, further comprising: the anodes of the three indicator lights are respectively led out with a signal wire; the three led-out signal wires are connected to a controller.
3. The fully steady state three-position four-way rotary reversing valve of claim 1, further comprising: the valve core is driven by the working position switching mechanism; the working position switching mechanism is arranged on the first oil port disc and comprises an electromagnetic push rod, a rack, a gear and a one-way bearing; the outer end of the transmission shaft extends out of the first oil port disc; the gear is supported at the outer end of the transmission shaft through a one-way bearing; the electromagnetic push rod is fixed on the first oil port disc, and the push rod is fixed with the rack; the rack is meshed with the gear; in the process that the push-out rod of the electromagnetic push rod moves from the inner limit position to the outer limit position, the gear rotates by 60 degrees.
4. The fully steady state three-position four-way rotary reversing valve of claim 1, further comprising: the valve core is driven by a motor or a steering engine; the specific driving structure is as follows: a key groove is formed in the center of the radial through flow groove, close to the first oil port disc, on the valve core; one end of the transmission shaft is connected with the key groove through a key, and the other end of the transmission shaft is connected with an output shaft of the motor or the steering engine through a coupler; the motor is arranged on the first oil port disc; and a sealing ring is arranged at the joint of the transmission shaft and the oil port disc.
5. The fully steady state three-position four-way rotary reversing valve of claim 1, further comprising: annular grooves are formed in the oil inlet P on the inner side surface of the first oil port disc, the first working oil port A, the oil return port T on the inner side surface of the second oil port disc and the second working oil port B; o-shaped sealing rings are embedded in the four annular grooves; the four O-shaped sealing rings respectively encircle the oil inlet P, the second working oil port B, the oil return port T and the first working oil port A and are in contact with the end face of the valve core.
6. The fully steady state three-position four-way rotary reversing valve of claim 1, further comprising: the plane passing through the axes of the two axial through-flow holes forms an included angle of 60 degrees with the length direction of the radial through-flow groove.
7. The fully steady state three-position four-way rotary reversing valve of claim 1, further comprising: the distances from the central axes of the oil inlet P, the first working oil port A, the second working oil port B and the oil return port T to the central axis of the valve core are equal to the distance from the axial through-flow hole axis to the central axis of the valve core.
8. The method for switching the working position of the all-stable three-position four-way rotary reversing valve according to claim 2, wherein: in an initial state, the valve core is positioned on one working position, the two spring needles respectively prop against two conical contact pieces belonging to the same contact piece, and one indicator lamp is lightened; when different working positions need to be switched, the valve core is driven to rotate, so that the valve core is switched to the required position; the controller judges whether the valve core reaches any working position according to whether any one of the three signal lines outputs high level; the controller judges which working position the valve core is in according to which signal line outputs high level.
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| CN202010159003.5A CN111237503B (en) | 2020-03-09 | 2020-03-09 | Fully-stable three-position four-way rotary reversing valve and working position switching method thereof |
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| CN114370514A (en) * | 2021-12-07 | 2022-04-19 | 浙江银轮机械股份有限公司 | Multi-way valve and thermal management system thereof |
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