CN111336147B - All-stable six-position four-way reversing valve based on rotary valve core and switching method thereof - Google Patents
All-stable six-position four-way reversing valve based on rotary valve core and switching method thereof Download PDFInfo
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- CN111336147B CN111336147B CN202010183582.7A CN202010183582A CN111336147B CN 111336147 B CN111336147 B CN 111336147B CN 202010183582 A CN202010183582 A CN 202010183582A CN 111336147 B CN111336147 B CN 111336147B
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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
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Abstract
The invention discloses a fully-stable six-position four-way reversing valve based on a rotary valve core and a switching method thereof. The invention relates to a fully-stable six-position four-way reversing valve based on a rotary valve core. The valve core and the valve seat form a revolute pair. Six oil inlets which are uniformly distributed along the circumferential direction of the central axis of the valve core are formed in the end face, close to the first oil inlet disc, of the valve core. Six oil outlets which are uniformly distributed along the circumferential direction of the central axis of the valve core are formed in the end face, close to the second oil outlet disc, of the valve core. The valve core is internally provided with only three one-way valves and five mutually independent flow passages, and each flow passage is a simple axial hole or a longitudinal hole, so that six mutually different working positions can be realized.
Description
Technical Field
The invention belongs to the technical field of electromagnetic valves, and particularly relates to a fully-stable six-position four-way reversing valve based on a rotary valve core and a switching method thereof.
Background
In the existing four-way electromagnetic directional valve, the working position of the valve core is adjusted by sliding, the complex processing cost of the valve core is high, and the valve core is generally only provided with three working positions; if the slide spool has six operating positions, the size of the spool needs to be greatly increased or the complexity of the spool needs to be increased. 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. The use cost of the electromagnetic directional valve is greatly improved, and only the bistable electromagnetic flux electric valve can have two stable working 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 six-position four-way reversing valve based on a rotary valve core and a switching method thereof.
The invention discloses a fully-stable six-position four-way reversing valve based on a rotary valve core, which comprises a valve seat (1), a valve core (2), a first one-way valve (4), a second one-way valve (5), a third one-way valve (6) and a working position switching mechanism (3). The valve seat (1) comprises a first oil port disc (1-1), a second oil port disc (1-2) and a connecting frame which are fixed together. The first oil port plate (1-1) and the second oil port plate (1-2) are arranged at intervals. An oil inlet (P) and a second working oil port (B) are formed in the first oil port disc (1-1); the second oil port disc (1-2) is provided with an oil return port (T) and a first working oil port (A).
The valve core (2) is arranged between the first oil port disc (1-1) and the second oil port disc (1-2), and two ends of the valve core and the first oil port disc (1-1) and the second oil port disc (1-2) respectively form a revolute pair. Six oil inlets which are uniformly distributed along the circumferential direction of the central axis of the valve core (2) are arranged on the end face of the valve core (2) close to the first oil port disc (1-1) and respectively from the first oil inlet (C1) to the sixth oil inlet (C6). Six oil outlets which are uniformly distributed along the circumferential direction of the central axis of the valve core (2) are formed in the end face of the valve core (2) close to the second oil port disc (1-2), and are respectively a first oil outlet (D1) to a sixth oil outlet (D6). By rotating the valve core, an oil inlet (P) and a second working oil port (B) on the valve seat can be respectively butted with six oil ports on the valve core, and an oil return port (T) and a first working oil port (A) on the valve seat can be respectively butted with each oil port on the valve core.
The first side oil inlet (C1) and the first side oil outlet (D1) of the valve core (2) are communicated, the fourth side oil inlet (C4) and the fourth side oil outlet (D4) are communicated, the second side oil inlet (C2) and the fourth side oil inlet (C4) are communicated through a first radial flow passage (2-1), the second side oil outlet (D2) and the fourth side oil outlet (D4) are communicated through a second radial flow passage (2-2), the third side oil inlet (C3) and the sixth side oil outlet (D6) are both cut off, and the sixth side oil inlet (C6) and the third side oil outlet (D3) are communicated through a third radial flow passage (2-3).
A first check valve (4) is arranged in a flow passage between the fourth side inlet oil port (C4) and the fourth side outlet oil port (D4); the input end of the first check valve (4) is communicated with a fourth outlet side oil port (D4). A second check valve (5) is arranged in a flow passage between the second side oil inlet (C2) and the fifth side oil inlet (C5); the input end of the second check valve (5) is communicated with a second inlet side oil port (C2). A third check valve (6) is arranged in a flow passage between the second outlet side oil port (D2) and the fifth outlet side oil port (D5); the input end of the third check valve (6) is communicated with the second outlet side oil port (D2).
And locking groove groups are arranged at two ends of the valve core (2). The locking groove group comprises six locking grooves (2-4) which are uniformly distributed along the circumferential direction of the central axis of the valve core (2). One or more marble containing grooves are formed in the opposite side surfaces of the first oil port disc (1-1) and the second oil port disc (1-2). The marble placing groove corresponds to the position of the locking groove group on the valve core (2). Each marble placing groove is internally provided with a spring (7) and a locking marble (8). The locking marble (8) is propped against the valve core (2) under the elasticity of the spring (8). The valve core (2) is in one working position under the state that the locking marble (8) props against the locking groove (2-4) on the valve core (2).
The working position switching mechanism (3) comprises an electromagnetic push rod (3-1), an incomplete cylindrical cam (3-2), a one-way bearing (3-3) and a connecting rod (3-4). The inner ring of the one-way bearing (3-3) is fixed with the outer side wall of the valve core (2). The incomplete cylindrical cam (3-2) is fixed with the outer ring of the one-way bearing (3-3). The outer side surface of the incomplete cylindrical cam (3-2) is provided with a working outline groove. The working profile groove is arranged obliquely with respect to the central axis of the spool and the corresponding central angle is 60 °. The electromagnetic push rod (3-1) is fixed on the valve seat. The outer end of the push-out rod of the electromagnetic push rod (3-1) is fixed with a connecting rod (3-4). The outer end of the connecting rod (3-4) extends into the working contour groove of the incomplete cylindrical cam (3-2).
Preferably, the oil inlet (P) on the first oil port disc (1-1) and the second working oil port (B) are arranged on two sides of the central axis of the valve core (2) in a centering mode. An oil return port (T) on the second oil port disc (1-2) and the first working oil port (A) are arranged on two sides of the central axis of the valve core (2) in a centering mode. The distance from the central axis of each oil inlet and outlet to the central axis of the valve core (2) is equal to the distance from the central axis of the oil inlet (P), the central axis of the first working oil port (A), the central axis of the second working oil port (B) and the central axis of the oil return port (T) to the central axis of the valve core (2).
Preferably, annular grooves are formed in the oil inlet (P) on the inner side surface of the first oil port disc (1-1), the second working oil port (B), the oil return port (T) on the inner side surface of the second oil port disc (1-2) and the first working oil port (A). And (O) type 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 (2).
Preferably, the valve core (2) and the valve seat have six different working positions; the oil port connection relation corresponding to the six working positions is as follows:
an oil inlet (P) is communicated with a first side oil inlet (C1); the second working oil port (B) is communicated with a fourth outlet side oil port (D4); the first outlet side oil port (D1) is communicated with the first working oil port (A); the oil return port (T) communicates with the fourth side oil inlet port (C4).
The oil inlet (P) is communicated with a second side oil inlet (C2); the second working oil port (B) is communicated with a fifth side oil inlet (C5); the first working oil port (A) is communicated with the second outlet side oil port (D2); the oil return port (T) communicates with a fifth side oil inlet port (C5).
The oil inlet (P) is communicated with a third side oil inlet (C3); the second working oil port (B) is communicated with a sixth side oil inlet port (C6); the first working oil port (A) is communicated with the third outlet side oil port (D3); the oil return port (T) is communicated with a sixth outlet side oil port (D6);
the oil inlet (P) is communicated with a fourth outlet side oil port (D4); the second working oil port (B) is communicated with the first side oil inlet port (C1); the first outlet side oil port (D1) is communicated with the fourth inlet side oil port (C4); the oil return port (T) is communicated with the first working oil port (A).
The oil inlet (P) is communicated with a fifth side oil inlet (C5); the second working oil port (B) is communicated with a second side oil inlet port (C2); the first working oil port (A) is communicated with a fifth side oil inlet (C5); the oil return port (T) communicates with a second outlet port (D2).
The oil inlet (P) is communicated with a sixth oil inlet side (C6); the second working oil port (B) is communicated with a third side oil inlet (C3); the first working oil port (A) is communicated with a sixth outlet side oil port (D6); the oil return port (T) is communicated with the third outlet side oil port (D3);
preferably, the locking grooves (2-4) are conical.
Preferably, the valve body (2) has a cylindrical shape.
Preferably, the axis of the coupling rod (3-4) perpendicularly intersects the central axis of the valve core (2).
Preferably, the outer ends of the coupling rods (3-4) are supported with rollers.
Preferably, the first oil port disc (1-1) and the second oil port disc (1-2) are both provided with two marble containing grooves; two marble placing grooves on the same oil port disc are arranged on two sides of the central axis of the valve core (2) in a centering way.
The switching method of the all-stable six-position four-way reversing valve based on the rotary valve core specifically comprises the following steps:
in an initial state, an oil inlet (P) and a second working oil port (B) on a first oil port disc (1-1) are in butt joint with two oil ports on the side of the valve core; an oil return port (T) on the second oil port disc (1-2) and the first working oil port (A) are in butt joint with two oil outlets on the valve core.
The method comprises the following steps that firstly, an electromagnetic push rod is pushed out, a connecting rod (3-4) moves outwards, the connecting rod (3-4) moves from one end of a working profile groove of an incomplete cylindrical cam (3-2) to the other end, the incomplete cylindrical cam (3-2) is driven to rotate forwards by 60 degrees, in the rotating direction, an outer ring and an inner ring of a one-way bearing (3-3) cannot rotate relatively, and a valve core (2) rotates by 60 degrees along with the incomplete cylindrical cam (3-2); so that the valve core (2) is switched from one working position to another adjacent working position.
And step two, the electromagnetic push rod retracts, the connecting rod (3-4) moves inwards to drive the incomplete cylindrical cam (3-2) to rotate in the reverse direction by 60 degrees, and the outer ring and the inner ring of the one-way bearing (3-3) can rotate relatively in the rotating direction. The valve core (2) is kept static.
The continuous switching of the working position of the valve core (2) can be repeatedly realized by repeatedly executing the first step and the second step, so that the valve core can be switched to any one working position by controlling the push-pull times of the electromagnetic push rod.
The invention has the beneficial effects that:
1. the valve core of the invention is switched by rotation; based on the structure, only three check valves and five mutually independent flow passages are arranged in the valve core, and each flow passage is a simple axial hole or a longitudinal hole, so that six mutually different working positions can be realized under the condition of very simple structure; compared with the existing multi-position four-way valve with the movable valve core, the cost of the invention is obviously reduced.
2. The electromagnetic push rod only needs to be electrified to consume energy 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 electromagnetic push rod is greatly reduced, and the service life of the electromagnetic push rod is prolonged.
3. According to the invention, through the matching of the electromagnetic push rod, the one-way bearing and the cylindrical cam, the continuous switching of the working position of the valve core can be realized only through the power-on and power-off of 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 overall structure of the present invention;
FIG. 2 is a perspective view of the valve cartridge of the present invention;
FIG. 3 is a schematic diagram of the oil circuit of six work stations of the present invention;
FIG. 4 is a schematic cross-sectional view of the present invention in a first operating position;
FIG. 5 is a schematic cross-sectional view of the present invention in a second operating position;
FIG. 6 is a schematic cross-sectional view of the present invention in a third operating position;
FIG. 7 is a schematic cross-sectional view of the present invention in a fourth operating position;
FIG. 8 is a schematic cross-sectional view of the present invention in a fifth operational position;
fig. 9 is a schematic cross-sectional view of the present invention in a sixth operating position.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, a fully-stable six-position four-way reversing valve based on a rotary valve core comprises a valve seat 1, a valve core 2, a first check valve 4, a second check valve 5, a third check valve 6, a locking assembly and a working position switching mechanism 3. The valve seat 1 comprises a first oil port disc 1-1, a second oil port disc 1-2 and a connecting frame. The first oil port plate 1-1 and the second oil port plate 1-2 are arranged at intervals and fixed through a connecting frame. An oil inlet P and a second working oil port B are formed in the first oil port disc 1-1; the second oil port disc 1-2 is provided with an oil return port T and a first working oil port A;
as shown in fig. 1, 2, 4, 5 and 6, the valve core 2 is arranged between the first port plate 1-1 and the second port plate 1-2, and two ends of the valve core and the first port plate 1-1 and the second port plate 1-2 respectively form a revolute pair through a rotating shaft and a bearing. The valve element 2 is cylindrical. Six side oil inlets which are circumferentially and uniformly distributed along the central axis of the valve core 2 and are sequentially arranged are formed in the end face of the valve core 2 close to the first oil port disc 1-1, and are respectively a first side oil inlet C1 to a sixth side oil inlet C6. Six outlet side oil ports which are circumferentially and uniformly distributed along the central axis of the valve core 2 and are sequentially arranged are formed in the end face, close to the second oil port disc 1-2, of the valve core 2, and are respectively a first outlet side oil port D1 to a sixth outlet side oil port D6.
An oil inlet P and a second working oil port B on the first oil port disc 1-1 are arranged on two sides of the central axis of the valve core 2 in a centering mode. And an oil return port T on the second oil port disc 1-2 and the first working oil port A are arranged on two sides of the central axis of the valve core 2 in a centering way. The distance from the central axis of each of the oil inlet and outlet to the central axis of the valve core 2 is equal to the distance from the central axis of the oil inlet P, the central axis of the first working oil port a, the central axis of the second working oil port B and the central axis of the oil return port T to the central axis of the valve core 2. Annular grooves are formed in the oil inlet P on the inner side surface of the first oil port disc 1-1, the second working oil port B, the oil return port T on the inner side surface of the second oil port disc 1-2 and the first working oil port A. 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 2. And the oil return valve is used for avoiding liquid leakage between the oil inlet P, the second working oil port B, the oil return port T and the first working oil port A and the valve core.
The first side inlet port C1 of the valve element 2 is communicated with the first side outlet port D1, the fourth side inlet port C4 is communicated with the fourth side outlet port D4, the second side inlet port C2 is communicated with the fourth side inlet port C4 through the first radial flow passage 2-1, the second side outlet port D2 is communicated with the fourth side outlet port D4 through the second radial flow passage 2-2, the third side inlet port C3 and the sixth side outlet port D6 are both cut off (i.e., blind holes), and the sixth side inlet port C6 is communicated with the third side outlet port D3 through the third radial flow passage 2-3.
A first check valve 4 is arranged in a flow passage between the fourth side inlet port C4 and the fourth side outlet port D4; the input end of the first check valve 4 is communicated with the fourth outlet port D4, and can prevent the hydraulic medium from flowing in the direction of the fourth inlet port C4 → the fourth outlet port D4 "(for preventing the oil in the oil inlet P from flowing to the first working port a). A second check valve 5 is arranged in a flow passage (a first radial flow passage 2-1) between the second side oil inlet port C2 and the fifth side oil inlet port C5; the input end of the second check valve 5 is communicated with the second intake port C2, and can prevent the hydraulic medium from flowing in the direction of the "fifth intake port C5 → the second intake port C2" (for preventing the oil in the oil inlet P from flowing to the second working port B). A third check valve 6 is arranged in a flow passage (a second radial flow passage 2-2) between the second outlet side oil port D2 and the fifth outlet side oil port D5; the input end of the third check valve 6 is communicated with the second outlet port D2, and can prevent the hydraulic medium from flowing in the direction of the "fifth outlet port D5 → the second outlet port D2" (for preventing the oil liquid of the first working port a from flowing to the oil return port T).
As shown in fig. 3, the valve core 2 and the valve seat have six different working positions, and the switching of six communication sequences is realized by rotating the valve core 2; the oil port connection relation corresponding to the six working positions is as follows:
(1) as shown in fig. 4, the oil inlet P → the first intake side port C1 → the first outlet side port D1 → the first working port a; the second working port B → the fourth outlet port D4 → the fourth inlet port C4 → the oil return port T (at this time, the first check valve 4 is open). 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. 5, the oil inlet P → the second oil inlet port C2 → the fifth oil inlet port C5 → the second working oil port B; the first working port a → the second outlet port D2 → the fifth inlet port C5 → 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. 6, the oil inlet P communicates with the third side oil inlet C3 and is closed; the oil return port T is communicated with and closed by a sixth outlet side oil port D6; the first working port a is communicated with the second working port B through a third outlet port D3 and a sixth inlet port C6. At the moment, the first working oil port A is communicated with the second working oil port B, the oil inlet P and the oil return port T are both cut off, the middle position state of the U-shaped three-position four-way reversing valve is presented, the oil cylinder is in a floating state, the piston rod freely moves, and the pump is not unloaded.
(4) As shown in fig. 7, the first check valve 4 between the fourth inlet port C4 and the fourth outlet port D4 prevents the hydraulic medium introduced into the inlet port P from flowing to the first working port a. The second working oil port B is communicated with the oil return port T through a first side inlet oil port C1 and a first side outlet oil port D1; the middle position state of the J-shaped three-position four-way reversing valve is presented, the pressure is kept at the oil inlet P, the pump is not unloaded, and the oil cylinder stops.
(5) As shown in fig. 8, the second check valve 5 between the second side oil inlet C2 and the fifth side oil inlet C5 prevents the hydraulic medium fed into the oil inlet P from flowing to the second working oil inlet B; the third check valve 6 between the second outlet port D2 and the fifth outlet port D5 prevents the hydraulic medium input to the first working port a from flowing to the oil return port T; 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.
(6) As shown in fig. 9, the first working port a communicates with and closes the third side port C3; the second working oil port B is communicated with and closed by a sixth outlet side oil port D6; only the port communicates with the oil return port T through the sixth inlet port C6 and the third outlet port D3. At the moment, the first working oil port A and the second working oil port B are cut off, the oil inlet P is communicated with the oil return port T, the middle position state of the M-shaped three-position four-way reversing valve is presented, the piston rod of the oil cylinder is locked, and the pump is unloaded.
The two ends of the valve core 2 are provided with locking groove groups. The locking groove group comprises six locking grooves 2-4 which are uniformly distributed along the circumferential direction of the central axis of the valve core 2. The groove is conical, so that the locking marble 8 is positioned, and the valve core 2 is convenient to separate when driven. Two marble containing grooves are formed in the opposite side faces of the first oil port disc 1-1 and the second oil port disc 1-2. The two marble containing grooves are arranged on two sides of the central axis of the valve core 2 in a centering way. The marble placing groove corresponds to the position of the locking groove group on the valve core 2. Each marble placing groove is internally provided with a locking component. The capture assembly includes a spring 7 and a capture pin 8. The spring 7 is arranged in the pin tumbler placing groove, and the outer end of the spring is fixed with the lock position pin tumbler 8. The spring 7 of the locking pin 8 is pushed against the valve core 2. When each locking marble 8 respectively props against the locking groove 2-4 on the valve core 2, the valve core 2 is in a working position. When the valve core 2 is at different working positions, the locking balls 8 prop against different locking grooves 2-4 (six locking grooves 2-4 correspond to six working positions).
The working position switching mechanism 3 comprises an electromagnetic push rod 3-1, an incomplete cylindrical cam 3-2, a one-way bearing 3-3 and a connecting rod 3-4. The inner ring of the one-way bearing 3-3 is fixed with the outer side wall of the valve core 2. The incomplete cylindrical cam 3-2 is fixed with the outer ring of the one-way bearing 3-3. The incomplete cylindrical cam 3-2 is arc-shaped (tile-shaped), and the outer side surface is provided with a working contour groove. The working profile groove is in the shape of a cylindrical spiral line, and the corresponding central angle is 60 degrees. The central axis of the working profile groove coincides with the central axis of the valve core 2. The electromagnetic push rod 3-1 is fixed on the valve seat. The push-pull direction of the electromagnetic push rod 3-1 is parallel to the central axis of the valve core 2. The outer end of the push-out rod of the electromagnetic push rod 3-1 is fixed with the inner end of the connecting rod 3-4. The axes of the coupling rods 3-4 perpendicularly intersect the central axis of the spool 2. The outer end of the coupling rod 3-4 extends into the working profile groove of the incomplete cylindrical cam 3-2. The outer end of the coupling rod 3-4 is supported with a roller to reduce the transmission resistance with the incomplete cylindrical cam 3-2. The power supply interface of the electromagnetic push rod 3-1 is connected with the controller through a relay.
When the electromagnetic push rod 3-1 is pushed out or retracted, the incomplete cylindrical cam 3-2 and the outer ring of the one-way bearing 3-3 are driven to rotate forwards or reversely; the central angle of the working profile groove is 60 degrees; therefore, one-time push-pull of the electromagnetic push rod 3-1 can drive the outer ring of the one-way bearing 3-3 to rotate forward by 60 degrees and then rotate backward by 60 degrees; the outer ring and the inner ring of the one-way bearing 3-3 can only relatively rotate along one direction; therefore, the outer ring of the one-way bearing 3-3 rotates in a reciprocating way once, and the outer ring of the one-way bearing 3-3 and the valve core 2 are driven to rotate for 60 degrees along one direction; and the valve core 2 can make the valve core 2 switch from one working position to another working position; therefore, the selection of the working position of the valve core 2 can be realized by the pushing out and the retracting back of the electromagnetic push rod 3-1.
The switching method of the all-stable six-position four-way reversing valve based on the rotary valve core specifically comprises the following steps:
in an initial state, an oil inlet P and a second working oil port B on the first oil port disc 1-1 are in butt joint with two side oil inlets which are symmetrical about a valve core axis on the valve core; an oil return port T and a first working oil port A on the second oil port disc 1-2 are in butt joint with two oil outlets on the valve core, which are symmetrical about the axis of the valve core.
Step one, pushing out an electromagnetic push rod, moving a connecting rod 3-4 outwards, moving the connecting rod 3-4 from one end of a working profile groove of an incomplete cylindrical cam 3-2 to the other end, driving the incomplete cylindrical cam 3-2 to rotate forwards by 60 degrees, and enabling an outer ring and an inner ring of a one-way bearing 3-3 to not rotate relatively in the rotating direction, so that a valve core 2 rotates by 60 degrees along with the incomplete cylindrical cam 3-2; so that the spool 2 switches from one operating position to the next.
And step two, the electromagnetic push rod retracts, the connecting rod 3-4 moves inwards, the incomplete cylindrical cam 3-2 is driven to rotate in the reverse direction by 60 degrees, and the outer ring and the inner ring of the one-way bearing 3-3 can rotate relatively in the rotating direction. The valve core 2 is subjected to the rotation resistance of a locking marble 8 in the locking assembly, so that the inner ring does not rotate and the valve core 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 2 can be repeatedly realized by repeatedly executing the first step and the second step, so that the valve core can be switched to any one working position by controlling the push-pull times of the electromagnetic push rod.
Claims (10)
1. The fully-stable six-position four-way reversing valve based on the rotary valve core comprises a valve seat (1), a valve core (2) and a working position switching mechanism (3); the method is characterized in that: the device also comprises a first one-way valve (4), a second one-way valve (5) and a third one-way valve (6); the valve seat (1) comprises a first oil port disc (1-1), a second oil port disc (1-2) and a connecting frame which are fixed together; the first oil port disc (1-1) and the second oil port disc (1-2) are arranged at intervals; an oil inlet (P) and a second working oil port (B) are formed in the first oil port disc (1-1); the second oil port disc (1-2) is provided with an oil return port (T) and a first working oil port (A);
the valve core (2) is arranged between the first oil port disc (1-1) and the second oil port disc (1-2), and two ends of the valve core and the first oil port disc (1-1) and the second oil port disc (1-2) respectively form a revolute pair; six oil inlets which are uniformly distributed along the circumferential direction of the central axis of the valve core (2) are formed in the end face of the valve core (2) close to the first oil port disc (1-1), and are respectively a first oil inlet (C1) to a sixth oil inlet (C6); six oil outlets which are uniformly distributed along the circumferential direction of the central axis of the valve core (2) are formed in the end face of the valve core (2) close to the second oil port disc (1-2), and are respectively a first oil outlet (D1) to a sixth oil outlet (D6); by rotating the valve core, an oil inlet (P) and a second working oil port (B) on the valve seat can be respectively butted with six oil ports on the inlet side of the valve core, and an oil return port (T) and a first working oil port (A) on the valve seat can be respectively butted with each oil port on the outlet side of the valve core;
a first side oil inlet (C1) of the valve core (2) is communicated with a first side oil outlet (D1), a fourth side oil inlet (C4) is communicated with a fourth side oil outlet (D4), a second side oil inlet (C2) is communicated with a fourth side oil inlet (C4) through a first radial flow passage (2-1), a second side oil outlet (D2) is communicated with a fourth side oil outlet (D4) through a second radial flow passage (2-2), a third side oil inlet (C3) and a sixth side oil outlet (D6) are both cut off, and the sixth side oil inlet (C6) is communicated with a third side oil outlet (D3) through a third radial flow passage (2-3);
a first check valve (4) is arranged in a flow passage between the fourth side inlet oil port (C4) and the fourth side outlet oil port (D4); the input end of the first check valve (4) is communicated with a fourth outlet side oil port (D4); a second check valve (5) is arranged in a flow passage between the second side oil inlet (C2) and the fifth side oil inlet (C5); the input end of the second check valve (5) is communicated with a second side oil inlet (C2); a third check valve (6) is arranged in a flow passage between the second outlet side oil port (D2) and the fifth outlet side oil port (D5); the input end of the third check valve (6) is communicated with a second outlet side oil port (D2);
two ends of the valve core (2) are provided with locking groove groups; the locking groove group comprises six locking grooves (2-4) which are uniformly distributed along the circumferential direction of the central axis of the valve core (2); one or more marble containing grooves are formed in the opposite side surfaces of the first oil port disc (1-1) and the second oil port disc (1-2); the marble placing groove corresponds to the position of the locking groove group on the valve core (2); each marble placing groove is internally provided with a spring (7) and a locking marble (8); the locking marble (8) is propped against the valve core (2) under the elasticity of the spring (7); the valve core (2) is in one working position under the state that the locking marble (8) props against the locking groove (2-4) on the valve core (2);
the working position switching mechanism (3) comprises an electromagnetic push rod (3-1), an incomplete cylindrical cam (3-2), a one-way bearing (3-3) and a connecting rod (3-4); the inner ring of the one-way bearing (3-3) is fixed with the outer side wall of the valve core (2); the incomplete cylindrical cam (3-2) is fixed with the outer ring of the one-way bearing (3-3); the outer side surface of the incomplete cylindrical cam (3-2) is provided with a working outline groove; the working contour groove is obliquely arranged relative to the central axis of the valve core, and the corresponding central angle is 60 degrees; the electromagnetic push rod (3-1) is fixed on the valve seat; a connecting rod (3-4) is fixed at the outer end of the push-out rod of the electromagnetic push rod (3-1); the outer end of the connecting rod (3-4) extends into the working contour groove of the incomplete cylindrical cam (3-2).
2. The fully stable six-position, four-way reversing valve based on a rotary valve cartridge of claim 1, wherein: an oil inlet (P) on the first oil port disc (1-1) and a second working oil port (B) are arranged on two sides of the central axis of the valve core (2) in a centering manner; an oil return port (T) on the second oil port disc (1-2) and the first working oil port (A) are arranged on two sides of the central axis of the valve core (2) in a centering manner; the distance from the central axis of each oil inlet and outlet to the central axis of the valve core (2) is equal to the distance from the central axis of the oil inlet (P), the central axis of the first working oil port (A), the central axis of the second working oil port (B) and the central axis of the oil return port (T) to the central axis of the valve core (2).
3. The fully stable six-position, four-way reversing valve based on a rotary valve cartridge of claim 1, wherein: annular grooves are formed in the oil inlet (P) on the inner side surface of the first oil port disc (1-1), the second working oil port (B), the oil return port (T) on the inner side surface of the second oil port disc (1-2) and the first working oil port (A); 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 (2).
4. The fully stable six-position, four-way reversing valve based on a rotary valve cartridge of claim 1, wherein: the valve core (2) and the valve seat have six different working positions; the oil port connection relation corresponding to the six working positions is as follows:
an oil inlet (P) is communicated with a first side oil inlet (C1); the second working oil port (B) is communicated with a fourth outlet side oil port (D4); the first outlet side oil port (D1) is communicated with the first working oil port (A); the oil return port (T) is communicated with the fourth side oil inlet port (C4);
the oil inlet (P) is communicated with a second side oil inlet (C2); the second working oil port (B) is communicated with a fifth side oil inlet (C5); the first working oil port (A) is communicated with the second outlet side oil port (D2); the oil return port (T) is communicated with the fifth side oil inlet port (C5);
the oil inlet (P) is communicated with a third side oil inlet (C3); the second working oil port (B) is communicated with a sixth side oil inlet port (C6); the first working oil port (A) is communicated with the third outlet side oil port (D3); the oil return port (T) is communicated with a sixth outlet side oil port (D6);
the oil inlet (P) is communicated with a fourth outlet side oil port (D4); the second working oil port (B) is communicated with the first side oil inlet port (C1); the first outlet side oil port (D1) is communicated with the fourth inlet side oil port (C4); the oil return port (T) is communicated with the first working oil port (A);
the oil inlet (P) is communicated with a fifth side oil inlet (C5); the second working oil port (B) is communicated with a second side oil inlet port (C2); the first working oil port (A) is communicated with a fifth side oil inlet (C5); the oil return port (T) is communicated with a second outlet side oil port (D2);
the oil inlet (P) is communicated with a sixth oil inlet side (C6); the second working oil port (B) is communicated with a third side oil inlet (C3); the first working oil port (A) is communicated with a sixth outlet side oil port (D6); the oil return port (T) communicates with the third outlet port (D3).
5. The fully stable six-position, four-way reversing valve based on a rotary valve cartridge of claim 1, wherein: the locking groove (2-4) is conical.
6. The fully stable six-position, four-way reversing valve based on a rotary valve cartridge of claim 1, wherein: the valve core (2) is cylindrical.
7. The fully stable six-position, four-way reversing valve based on a rotary valve cartridge of claim 1, wherein: the axis of the connecting rod (3-4) is vertically crossed with the central axis of the valve core (2).
8. The fully stable six-position, four-way reversing valve based on a rotary valve cartridge of claim 1, wherein: the outer ends of the connecting rods (3-4) are supported with rollers.
9. The fully stable six-position, four-way reversing valve based on a rotary valve cartridge of claim 1, wherein: the first oil port disc (1-1) and the second oil port disc (1-2) are respectively provided with two marble containing grooves; two marble placing grooves on the same oil port disc are arranged on two sides of the central axis of the valve core (2) in a centering way.
10. The method of switching a fully steady state six-position four-way reversing valve based on a rotary valve cartridge of claim 1, wherein: in an initial state, an oil inlet (P) and a second working oil port (B) on a first oil port disc (1-1) are in butt joint with two oil ports on the side of the valve core; an oil return port (T) on the second oil port disc (1-2) and the first working oil port (A) are butted with two oil outlets on the valve core;
the method comprises the following steps that firstly, an electromagnetic push rod is pushed out, a connecting rod (3-4) moves outwards, the connecting rod (3-4) moves from one end of a working profile groove of an incomplete cylindrical cam (3-2) to the other end, the incomplete cylindrical cam (3-2) is driven to rotate forwards by 60 degrees, in the rotating direction, an outer ring and an inner ring of a one-way bearing (3-3) cannot rotate relatively, and a valve core (2) rotates by 60 degrees along with the incomplete cylindrical cam (3-2); so that the valve core (2) is switched from one working position to another adjacent working position;
step two, the electromagnetic push rod retracts, the connecting rod (3-4) moves inwards to drive the incomplete cylindrical cam (3-2) to rotate in the reverse direction by 60 degrees, and the outer ring and the inner ring of the one-way bearing (3-3) can rotate relatively in the rotating direction; the valve core (2) is kept static;
the continuous switching of the working position of the valve core (2) can be repeatedly realized by repeatedly executing the first step and the second step, so that the valve core can be switched to any one working position by controlling the push-pull times of the electromagnetic push rod.
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| CN202010183582.7A CN111336147B (en) | 2020-03-16 | 2020-03-16 | All-stable six-position four-way reversing valve based on rotary valve core and switching method thereof |
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| CN111336147B true CN111336147B (en) | 2021-08-31 |
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| JPH07293730A (en) * | 1994-04-22 | 1995-11-10 | Fujikin:Kk | Fluid controller |
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| CN111336147A (en) | 2020-06-26 |
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