CN103291962A - Rotary valve device capable of automatically eliminating hydraulic cylinder piston offset - Google Patents
Rotary valve device capable of automatically eliminating hydraulic cylinder piston offset Download PDFInfo
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- CN103291962A CN103291962A CN2013102652503A CN201310265250A CN103291962A CN 103291962 A CN103291962 A CN 103291962A CN 2013102652503 A CN2013102652503 A CN 2013102652503A CN 201310265250 A CN201310265250 A CN 201310265250A CN 103291962 A CN103291962 A CN 103291962A
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Abstract
The invention discloses a rotary valve device capable of automatically eliminating hydraulic cylinder piston offset. The rotary valve device comprises a valve body, a first valve sleeve, a second valve sleeve, a valve plug, a first end cover and a second end cover. A first boss, a second boss, a third boss and a fourth boss are arranged on the valve plug, and the third boss, the first boss, the second boss and the fourth boss are sequentially arranged in the direction from the first end cover to the second end cover. Oil cavities are formed between adjacent bosses, and corresponding oil ports are arranged on the valve body walls where the oil cavities and the bosses are located. Grooves are arranged on the end surfaces of the first boss and the second boss, and corresponding valve sleeve windows are arranged on the first valve sleeve and the second valve sleeve where the grooves are located. A fifth boss and a sixth boss are arranged on a piston of a hydraulic cylinder matched with a rotary valve, an oil cavity is formed between the fifth boss and the sixth boss, and a corresponding oil port is arranged on the cylinder body wall where the oil cavity and the boss are located. The rotary valve device has the advantages of being capable of automatically controlling the flow flowing towards two sides of the hydraulic cylinder through relative moving of the second valve sleeve and the first valve sleeve, and thereby automatically eliminating hydraulic cylinder piston offset.
Description
Technical field
The present invention relates to a kind of hydraulic pressure commutation, rectifying device, be mainly used in realizing eliminating automatically in the field of engineering technology of hydraulic cylinder piston skew.
Background technique
Rotary valve refers to rotate to control by spool the valve of oil circuit break-make and commutation.But because the restriction of machining accuracy, rotary valve can't accomplish to mate completely symmetry, simultaneously because the sealing of oil hydraulic cylinder and internal leakage etc. asymmetric causes in the reciprocating motion of the pistons of oil hydraulic cylinder a side of piston deflection oil hydraulic cylinder.In a lot of engineering fields, all require hydraulic cylinder piston to-and-fro motion symmetrically.
Summary of the invention
The purpose of this invention is to provide a kind of rotary valve device that can eliminate the hydraulic cylinder piston skew automatically.
For achieving the above object, the technical solution used in the present invention is: the rotary valve device that the present invention can eliminate the hydraulic cylinder piston skew automatically comprises valve body, spool, first valve pocket, second valve pocket, first end cap and second end cap, be provided with first boss, second boss, the 3rd boss and the 4th boss at spool, the 3rd boss, first boss, second boss and the 4th boss are arranged to the direction of second end cap successively along first end cap; Second end of spool runs through and stretches out second end cap; Second end of described spool is connected with the main shaft of motor by coupling or is connected with the rotor of rotation proportion electro-magnet;
Form first chamber between first boss of described spool and second boss, have the P filler opening that first chamber is communicated with oil supply system on the valve body wall at place, first chamber; Form second chamber between first boss and the 3rd boss, have the T that second chamber is communicated with mailbox on the valve body wall at place, second chamber
1Return opening; Form the 3rd chamber between second boss and the 4th boss, have the T that the 3rd chamber is communicated with mailbox on the valve body wall at place, the 3rd chamber
2Return opening;
Have the A hydraulic fluid port that can be communicated with actuator on the valve body wall at the first boss place of described spool, have the B hydraulic fluid port that can be communicated with actuator on the valve body wall at the second boss place of described spool;
On one side end face of described first boss along the circumferential direction the compartment of terrain have and can make T
1First groove that return opening is communicated with the A hydraulic fluid port, on the opposite side end face of described first boss along the circumferential direction the compartment of terrain have second groove that the P filler opening is communicated with the A hydraulic fluid port; On one side end face of described second boss along the circumferential direction the compartment of terrain have the 3rd groove that the P filler opening is communicated with the B hydraulic fluid port, on the opposite side end face of described second boss along the circumferential direction the compartment of terrain have and can make T
2The 4th groove that return opening is communicated with the B hydraulic fluid port; First groove along the circumferential direction alternately is staggeredly arranged with the corresponding orthographic projection of second groove on the projection plane vertical with the medial axis of spool, the 3rd groove along the circumferential direction alternately is staggeredly arranged with the corresponding orthographic projection of the 4th groove on the projection plane vertical with the medial axis of spool, first groove is overlapped with the orthographic projection of the 3rd groove on the projection plane vertical with the medial axis of spool, and second groove is overlapped with the orthographic projection of the 4th groove on the projection plane vertical with the medial axis of spool;
On the interior edge face of first end cap along the circumferential direction the compartment of terrain be provided with first projection, first end face of first valve pocket along the circumferential direction compartment of terrain is provided with first aperture, described first projection is inserted in described first aperture correspondingly, is transition fit between first projection and first aperture; Along the circumferential direction go up the compartment of terrain on the interior edge face of second end cap and be provided with second projection, second end face of first valve pocket along the circumferential direction compartment of terrain is provided with second aperture, described second projection is inserted in described second aperture correspondingly, is transition fit between second projection and second aperture;
First valve pocket is installed on the outer surface of spool, is Spielpassung between first valve pocket and the spool; Second valve pocket is installed on the outer surface of first valve pocket, and second valve pocket can be with respect to first valve pocket axially moving back and forth along first valve pocket;
First valve pocket has the corresponding first valve pocket window, the second valve pocket window, the 3rd valve pocket window and the 4th valve pocket window in the position at described first groove, second groove, the 3rd groove and the 4th groove place, the first valve pocket window, the second valve pocket window, the 3rd valve pocket window are overlapped with the orthographic projection of the 4th valve pocket window on the projection plane vertical with the medial axis of spool; Second valve pocket has corresponding the 5th valve pocket window, the 6th valve pocket window, the 7th valve pocket window and the 8th valve pocket window in the position at the first valve pocket window, the second valve pocket window, the 3rd valve pocket window and the 4th valve pocket window place; The 5th valve pocket window, the 6th valve pocket window, the 7th valve pocket window are overlapped with the orthographic projection of the 8th valve pocket window on the projection plane vertical with the medial axis of spool;
Form the 4th chamber between first end face of described second valve pocket and the interior edge face of first end cap, have first hydraulic fluid port on the valve body wall at place, the 4th chamber; Form the 5th chamber between second end face of second valve pocket and the interior edge face of second end cap, have second hydraulic fluid port on the valve body wall at place, the 5th chamber; Can move along the axial direction to second end cap of first valve pocket under the hydraulic oil of second valve pocket in the 4th chamber promotes, can move along the axial direction to first end cap of first valve pocket under the promotion of the hydraulic oil of second valve pocket in the 5th chamber;
The piston upper edge piston of oil hydraulic cylinder be axially arranged with the 5th step and the 6th step, form the 6th chamber between described the 5th step and the 6th step, have the 7th hydraulic fluid port that can be connected with oil supply system on the cylinder body at place, the 6th chamber; The cylinder body of the oil hydraulic cylinder at described the 5th step place is provided with the 3rd hydraulic fluid port and the 4th hydraulic fluid port, forms zero lap between described the 5th step, the 3rd hydraulic fluid port and the 4th hydraulic fluid port three; The cylinder body of the oil hydraulic cylinder at described the 6th step place is provided with the 5th hydraulic fluid port and the 6th hydraulic fluid port, forms zero lap between described the 6th step, the 5th hydraulic fluid port and the 6th hydraulic fluid port three;
The cylinder body of and oil hydraulic cylinder motionless when the piston of oil hydraulic cylinder moves or motionless and piston oil hydraulic cylinder of the cylinder body of oil hydraulic cylinder when moving to the 5th boss place direction to the 6th boss place direction, and described first hydraulic fluid port is communicated with the 4th hydraulic fluid port on the cylinder body and described second hydraulic fluid port is communicated with the 6th hydraulic fluid port on the cylinder body; The cylinder body of and oil hydraulic cylinder motionless when the piston of oil hydraulic cylinder moves or motionless and piston oil hydraulic cylinder of the cylinder body of oil hydraulic cylinder when moving to the 6th boss place direction to the direction at the 5th boss place, and described first hydraulic fluid port is communicated with the 3rd hydraulic fluid port on the cylinder body and described second hydraulic fluid port is communicated with the 5th hydraulic fluid port on the cylinder body.
Further, first groove of the present invention and/or second groove evenly distribute along the circumferencial direction of the end face of described first boss, and the 3rd groove and/or the 4th groove are along evenly distributing on the circumferencial direction of the end face of described second boss.
Further, the first valve pocket window of the present invention, the second valve pocket window, the 3rd valve pocket window and the 4th valve pocket window evenly distribute along the circumferencial direction of described first valve pocket respectively separately; Described the 5th valve pocket window, the 6th valve pocket window, the 7th valve pocket window and the 8th valve pocket window evenly distribute along the circumferencial direction of described second valve pocket respectively separately; The described first valve pocket window is communicated with the 5th valve pocket window, and the described second valve pocket window is communicated with the 6th valve pocket window, and described the 3rd valve pocket window is communicated with the 7th valve pocket window, and described the 4th valve pocket window is communicated with the 8th valve pocket window.
Further, the present invention also comprises first caging bolt and second caging bolt, and described first caging bolt is threaded with first end cap, and first caging bolt stretches into described the 4th chamber; Described second caging bolt is threaded with second end cap, and second caging bolt stretches into described the 5th chamber.
Compared with prior art, the invention has the beneficial effects as follows: the present invention can eliminate the polarization shift of hydraulic cylinder piston automatically, namely by second valve pocket on the first valve pocket axial direction relative to the moving of first valve pocket, control flows to the difference of oil hydraulic cylinder both sides flow, to proofread and correct the polarization of piston.Second valve pocket can be regulated in the displacement that first valve pocket axially moves simultaneously, with the offset correction speed of control piston and the vibrational waveform of control piston or oil hydraulic cylinder.In addition, be provided with the 3rd boss and the 4th boss at spool and can avoid hydraulic oil the impact of seal ring to be caused seal ring damage, and prevent that the fluid pulsation from causing unbalance stress on the spool axial direction.
Description of drawings
Fig. 1 is the hydraulic circuit schematic diagram that the present invention can eliminate the rotary valve device of hydraulic cylinder piston skew automatically, and wherein, valve body, first end cap, second end cap, first valve pocket, second valve pocket partly are longitudinal section, center sectional views;
Fig. 2 is the rotary valve internal structure schematic representation that the present invention can eliminate the rotary valve device of hydraulic cylinder piston skew automatically, and wherein valve body, first end cap, second end cap, first valve pocket, second valve pocket partly are longitudinal section, center sectional views;
Fig. 3 is the three-dimensional structure schematic representation of spool 32;
Fig. 4 is the three-dimensional structure schematic representation that first valve pocket 5 is cut open along the longitudinal section, center of valve pocket;
Fig. 5 is the three-dimensional structure schematic representation of second valve pocket 4;
Fig. 6 is the three-dimensional structure schematic representation of first end cap 1;
Fig. 7 is the three-dimensional structure schematic representation of second end cap 6;
Hydraulic circuit schematic diagram when Fig. 8 is the hydraulic cylinder piston rod left avertence of the present invention's rotary valve device that can eliminate hydraulic cylinder piston skew automatically, wherein valve body, first end cap, second end cap, first valve pocket, second valve pocket partly are longitudinal section, center sectional views;
Fig. 9 is the enlarged view of I portion among Fig. 6;
Hydraulic circuit schematic diagram when Figure 10 is the hydraulic cylinder piston rod right avertence of the present invention's rotary valve device that can eliminate hydraulic cylinder piston skew automatically, wherein valve body, first end cap, second end cap, first valve pocket, second valve pocket partly are longitudinal section, center sectional views;
Figure 11 is the enlarged view of II portion among Fig. 8;
Among the figure, 1-first end cap; 2-first caging bolt; The 3-valve body; 4-second valve pocket; 5-first valve pocket; 6-second end cap; 7-second caging bolt; 8-the 3rd boss; 9-first boss; 10-second boss; 11-the 4th boss; 12-second chamber; 13-first chamber; 14-the 3rd chamber; 15-the 4th chamber; 16-the 5th chamber; 17-first hydraulic fluid port; 18-T
1Return opening; The 19-P hydraulic fluid port; 20-T
2Return opening; 21-second hydraulic fluid port; 22-the 3rd hydraulic fluid port; 23-the 4th hydraulic fluid port; 24-the 7th hydraulic fluid port; 25-the 5th hydraulic fluid port; 26 the 6th hydraulic fluid ports; 27-spool first end; 28-spool second end; The 29-cylinder body; 30-oil hydraulic cylinder end cap; The 31-piston; The 32-spool; 33-first groove; 34-second groove; 35-the 3rd groove; 36-the 4th groove; The 37-first valve pocket window; The 38-second valve pocket window; 39-the 3rd valve pocket window; 40-the 4th valve pocket window; 41-the 5th valve pocket window; 42-the 6th valve pocket window; 43-the 7th valve pocket window; 4-the 8th valve pocket window; 45-the 5th boss; 46-the 6th boss; 47-the 6th chamber; The 48-A hydraulic fluid port; The 49-B hydraulic fluid port; 50-first aperture; 51-second aperture; 52-first projection; 53-second projection.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples.
To shown in Figure 5, the rotary valve device that the present invention can eliminate the hydraulic cylinder piston skew automatically mainly comprises valve body 3, spool 32, first valve pocket 5, second valve pocket 4, first end cap 1, second end cap 6 as Fig. 1.First end cap 1 and second end cap 6 are installed together at end and the valve body 3 at the two ends of valve body 3 respectively.Second valve pocket 4 places in the chamber of valve body 3, and first valve pocket 5 places in the chamber of second valve pocket 4, and an end of first valve pocket 5 and first end cap 1 are fixing, and the other end of first valve pocket 5 and second end cap 6 are fixing, and spool 32 places in the chamber of first valve pocket 5.As Fig. 1, Fig. 2 and shown in Figure 3, be provided with first boss 9, second boss 10, the 3rd boss 8 and the 4th boss 11 at spool 32, and the 3rd boss 8, first boss 9, second boss 10 and the 4th boss 11 are arranged successively on from first end cap 1 to the direction of second end cap 6.And adopt the lip-type packing sealing between spool 32 and first end cap 1, adopt the lip-type packing sealing between spool 32 and second end cap 6.Second end 28 of spool runs through and stretches out second end cap 6, and second end 28 of spool can be connected with electric machine main shaft by coupling, drives spool by electric machine main shaft and realizes rotatablely moving of spool.As another embodiment of the invention, second end 28 of spool also can be connected by the rotor of coupling with the rotation proportion electro-magnet, realizes rotatablely moving of spool by the rotor banding movable valve plug of rotation proportion electro-magnet.
As depicted in figs. 1 and 2, form first chamber 13 between first boss 9 and second boss 10, have the P hydraulic fluid port 19 that first chamber 13 is communicated with oil supply system on the wall of the valve body 3 at 13 places, first chamber, the fluid in the oil supply system can enter first chamber 13 by P hydraulic fluid port 19.Have the T that second chamber 12 is communicated with fuel tank on the wall of the valve body 3 at formation 12 places, 12, the second chambeies, second chamber between first boss 9 and the 3rd boss 8
1Return opening 18, the fluid that enters into second chamber 12 can pass through T
1Return opening 18 flows back to fuel tank.Have the T that the 3rd chamber 14 is communicated with fuel tank on the wall of formation 14, the three chambeies, the 3rd chamber 14 place valve bodies 3 between second boss 10 and the 4th boss 11
2Return opening 20, the fluid that enters into the 3rd chamber 14 can pass through T
2Return opening 20 flows back to fuel tank.
As Fig. 1, Fig. 2 and shown in Figure 7, have the A hydraulic fluid port 48 that can be communicated with actuator at the wall of the valve body 3 at first boss, 9 places, can control actuator's motion by the fluid of A hydraulic fluid port 48.Wall at the valve body 3 at second boss, 10 places has the B hydraulic fluid port 49 that can be communicated with actuator, can control actuator's motion by the fluid of B hydraulic fluid port 49.Along the circumferential direction the compartment of terrain has and can make T on a lateral section of first boss 9
1First groove 33 that return opening 18 is communicated with A hydraulic fluid port 48, along the circumferential direction the compartment of terrain has second groove 34 that P hydraulic fluid port 19 is communicated with A hydraulic fluid port 48 on the opposite side section of first boss 9.Along the circumferential direction the compartment of terrain has the 3rd groove 35 that P hydraulic fluid port 19 is communicated with B hydraulic fluid port 49 on a lateral section of second boss 10, and along the circumferential direction the compartment of terrain has and can make T on the opposite side section of second boss 10
2The 4th groove 36 that return opening 20 is communicated with B hydraulic fluid port 49.First groove 33 along the circumferential direction alternately is staggeredly arranged with the corresponding orthographic projection of second groove 34 on the projection plane vertical with the medial axis of spool 32, the 3rd groove 35 along the circumferential direction alternately is staggeredly arranged with the corresponding orthographic projection of the 4th groove 36 on the projection plane vertical with the medial axis of spool 32, first groove 33 is overlapped with the orthographic projection of the 3rd groove 35 on the projection plane vertical with the medial axis of spool 32, and second groove 34 is overlapped with the orthographic projection of the 4th groove 36 on the projection plane vertical with the medial axis of spool 32.
As Fig. 1, Fig. 2, Fig. 4, Fig. 6 and shown in Figure 7, on the interior edge face of first end cap 1 along the circumferential direction at interval be provided with first projection 52, first end face of first valve pocket 5 along the circumferential direction at interval be provided with first aperture 50, first projection 52 is inserted in first aperture 50 one to one, is transition fit between first projection, 52 and first aperture 50.On the interior edge face of second end cap 6 along the circumferential direction at interval be provided with second projection 53, second end face of first valve pocket 5 along the circumferential direction at interval be provided with second aperture 51, second projection 53 is inserted in second aperture 51 one to one, is transition fit between second projection, 53 and second aperture 51.
As depicted in figs. 1 and 2, first valve pocket 5 is installed on the outer surface of spool 32, and first valve pocket 5 and spool 32 are Spielpassung.First end face of first valve pocket 5 closely contacts with the internal surface of first end cap, second end face of first valve pocket 5 closely contacts with the internal surface of second end cap, and since between first projection, 52 and first aperture 50 for being that transition fit concerns between transition fit relation and second projection, 53 and second aperture 51, first valve pocket can not can not move along its axial direction along its circumferential direction rotation.Second valve pocket 4 is installed on the outer surface of first valve pocket 5, and second valve pocket 4 can be with respect to first valve pocket 5 axially moving back and forth along first valve pocket.
As Fig. 1, Fig. 2, Fig. 4 and shown in Figure 5, first valve pocket 5 has the corresponding first valve pocket window 37, the second valve pocket window 38, the 3rd valve pocket window 39 and the 4th valve pocket window 40, the first valve pocket windows 37, the second valve pocket window 38 in the position at first groove 33, second groove 34, the 3rd groove 35 and the 4th groove 36 places, the 3rd valve pocket window 39 is overlapped with the orthographic projection of the 4th valve pocket window 40 on the projection plane vertical with the medial axis of spool 32.Second valve pocket 4 has corresponding the 5th valve pocket window 41, the 6th valve pocket window 42, the 7th valve pocket window 43 and the 8th valve pocket window 44, the five valve pocket windows 41, the 6th valve pocket window 42 in the position at the first valve pocket window 37, the second valve pocket window 38, the 3rd valve pocket window 39 and the 4th valve pocket window 40 places, the 7th valve pocket window 43 is overlapped with the orthographic projection of the 8th valve pocket window 44 on the projection plane vertical with the medial axis of spool 32.
As depicted in figs. 1 and 2, have first hydraulic fluid port 17 on the wall of the valve body 3 at formation 15 places, 15, the four chambeies, the 4th chamber between the internal surface of first end face of second valve pocket 4 and first end cap 1.Have second hydraulic fluid port 21 on the wall of the valve body 3 at formation 16 places, 16, the five chambeies, the 5th chamber between second end face of second valve pocket 4 and the interior edge face of second end cap 6.Can be along axially the moving right of first valve pocket 5 under the promotion of the pressure oil of second valve pocket 4 in the 4th chamber 15, can axially being moved to the left along first valve pocket 5 under the promotion of the hydraulic oil of second valve pocket 4 in the 5th chamber 16.
As shown in Figure 1, the piston 31 upper edge piston axial directions of oil hydraulic cylinder are provided with the 5th boss 45 and the 6th boss 46, form the 6th chamber 47 between the 5th boss 45 and the 6th boss 46, have the 7th hydraulic fluid port 24 that can be connected with oil supply system on the cylinder body 29 at 47 places, the 6th chamber, system's fuel feeding can enter the 6th chamber 47 by the 7th hydraulic fluid port 24.The cylinder body 29 at the 5th boss 45 places is provided with between the 3rd hydraulic fluid port 22 and the 4th hydraulic fluid port 23, the five boss 45, the 3rd hydraulic fluid port 22 and the 4th hydraulic fluid port 23 threes and forms zero lap.The cylinder body 29 at the 6th boss 46 places is provided with between the 5th hydraulic fluid port 25 and the 6th hydraulic fluid port 26, the six boss 46, the 5th hydraulic fluid port 25 and the 6th hydraulic fluid port 26 threes and forms zero lap.When the motionless and cylinder body 29 oil hydraulic cylinder of the piston 31 of oil hydraulic cylinder moved right, namely when piston 31 left avertences, first hydraulic fluid port 17 was communicated with the 4th hydraulic fluid port 23 on the cylinder body 29, and second hydraulic fluid port 21 is communicated with the 6th hydraulic fluid port 26 on the cylinder body 29.When the motionless and cylinder body 29 oil hydraulic cylinder of the piston 31 of oil hydraulic cylinder was moved to the left, namely when piston 31 right avertence, first hydraulic fluid port 17 was communicated with the 3rd hydraulic fluid port 22 on the cylinder body 29, and second hydraulic fluid port 21 is communicated with the 5th hydraulic fluid port 25 on the cylinder body 29.As another embodiment of the invention, when the motionless and piston 31 oil hydraulic cylinder of the cylinder body 29 of oil hydraulic cylinder is moved to the left, namely when piston 31 left avertences, first hydraulic fluid port 17 is communicated with the 4th hydraulic fluid port 23 on the cylinder body 29, and second hydraulic fluid port 21 is communicated with the 6th hydraulic fluid port on the cylinder body 29; When the motionless and piston 31 oil hydraulic cylinder of the cylinder body 29 of oil hydraulic cylinder moved right, namely when piston 31 right avertence, first hydraulic fluid port 17 was communicated with the 3rd hydraulic fluid port 22 on the cylinder body 29, and second hydraulic fluid port 21 is communicated with the 5th hydraulic fluid port 25 on the cylinder body 29.
As preferred version of the present invention, first groove 33 on first boss 9 evenly distributes along the circumferencial direction of the end face of first boss 9, and second groove 34 on first boss 9 evenly distributes along the circumferencial direction of the end face of first boss 9.The 3rd groove 35 on second boss 10 evenly distributes along the circumferencial direction of the end face of second boss 10, and the 4th groove 36 on second boss 10 evenly distributes along the circumferencial direction of the end face of second boss 10.
As preferred version of the present invention, the first valve pocket window 37 evenly distributes along the circumferencial direction of first valve pocket 5, the second valve pocket window 38 evenly distributes along the circumferencial direction of first valve pocket 5, the 3rd valve pocket window 39 evenly distributes along the circumferencial direction of first valve pocket 5, and the 4th valve pocket window 40 evenly distributes along the circumferencial direction of first valve pocket 5.The 5th valve pocket window 41 evenly distributes along the circumferencial direction of second valve pocket 4, the 6th valve pocket window 42 evenly distributes along the circumferencial direction of second valve pocket 4, the 7th valve pocket window 43 evenly distributes along the circumferencial direction of second valve pocket 4, and the 8th valve pocket window 44 evenly distributes along the circumferencial direction of second valve pocket 4.The first valve pocket window 37 is connected with the 5th valve pocket window 41, and the second valve pocket window 38 is connected with the 6th valve pocket window 42, and the 3rd valve pocket window 39 is connected with the 7th valve pocket window 43, and the 4th valve pocket window 40 is connected with the 8th valve pocket window 44.
As preferred version of the present invention, in real work, can be on first end cap 1 and second end cap 6 additional springs or bolt limit the displacement of second valve pocket 4 and the vibrational waveform of control piston or oil hydraulic cylinder.First caging bolt 2 and first end cap 1 are by being threaded among the present invention, and first caging bolt 2 stretches into the 4th chamber 15.Second caging bolt 7 and second end cap 6 are by being threaded, and second caging bolt stretches into the 5th chamber 16.
The working procedure of automatic elimination piston skew that the present invention can eliminate the rotary valve device of hydraulic cylinder piston skew automatically is: system's fuel feeding enters first chamber 13 by P hydraulic fluid port 19, when second groove 34 was communicated with the second valve pocket window 38, the system's fuel feeding that enters first chamber 13 flowed to A hydraulic fluid port 48; When the 3rd groove 35 was communicated with the 3rd valve pocket 39, the system's fuel feeding that enters first chamber 13 flowed to B hydraulic fluid port 49.When system's fuel feeding flowed to A hydraulic fluid port 48, system's fuel feeding entered the left side oil pocket of oil hydraulic cylinder by first endoporus of second groove 34, the second valve pocket window 38, the 6th valve pocket window 42, A hydraulic fluid port 48, piston 31 successively, makes cylinder body 29 to left movement.Simultaneously, the hydraulic oil of oil hydraulic cylinder right side oil pocket, second endoporus, B hydraulic fluid port 49, the 8th valve pocket window 44, the 4th valve pocket window 40, the 4th groove 36 by piston 31 flows into the 3rd chamber 14 successively, passes through T
2Return opening 20 flows back to fuel tank.When system's fuel feeding flowed to B hydraulic fluid port 49, system's fuel feeding entered the right side oil pocket of oil hydraulic cylinder by second endoporus of the 3rd groove 35, the 3rd valve pocket window 39, the 7th valve pocket window 43, B hydraulic fluid port 49, piston 31 successively, and cylinder body 29 is moved right.Simultaneously, the hydraulic oil of oil hydraulic cylinder left side oil pocket, first endoporus, A hydraulic fluid port 48, the 5th valve pocket window 41, the first valve pocket window 37, first groove 33 by piston 31 flows into second chamber 12 successively, passes through T
1Return opening 18 flows back to fuel tank.Can realize the side-to-side vibrations of oil hydraulic cylinder like this, but because the restriction of machining accuracy, rotary valve can't accomplish to mate completely symmetry, simultaneously because the sealing of oil hydraulic cylinder and internal leakage asymmetric, cause in the reciprocating motion of the pistons of oil hydraulic cylinder a side of piston deflection oil hydraulic cylinder.
As Fig. 8 and shown in Figure 9, hydraulic cylinder body 29 right avertence, relative piston 31 left avertences.At this moment, system's fuel feeding part enters the 6th chamber 47 by the 7th hydraulic fluid port 24, enters the 4th chamber 15 by the 4th hydraulic fluid port 23, first hydraulic fluid port 17 successively then.The hydraulic oil that enters the 4th chamber 15 promotes second valve pocket 4 and moves right.Simultaneously, the hydraulic oil in the 5th chamber 16 enters oil hydraulic cylinder right side oil pocket by second hydraulic fluid port 21, the 6th hydraulic fluid port 26 successively.Because second valve pocket 4 moves right, the circulation area between the first valve pocket window 37 and the 5th valve pocket window 41 reduces, and the circulation area between the 3rd valve pocket window 39 and the 7th valve pocket window 43 reduces.Oil hydraulic cylinder is in vibration processes, and the hydraulic oil that system's fuel feeding flows to B hydraulic fluid port 49 lacks than the hydraulic oil that flows to A hydraulic fluid port 48, and namely the amplitude vibrated to the right of cylinder body 29 is littler than the amplitude of vibration left, reaches the purpose of automatic elimination hydraulic cylinder piston skew.
As shown in Figure 10 and Figure 11, hydraulic cylinder body 29 left avertences, relative piston 31 right avertence.At this moment, system's fuel feeding part enters the 6th chamber 47 by the 7th hydraulic fluid port 24, enters the 5th chamber 16 by the 5th hydraulic fluid port 25, second hydraulic fluid port 21 successively then, and the hydraulic oil that enters the 5th chamber 16 promotes second valve pocket 4 to left movement.Simultaneously, the hydraulic oil in the 4th chamber 15 enters oil hydraulic cylinder left side oil pocket by first hydraulic fluid port 17, the 3rd hydraulic fluid port 22 successively.Because second valve pocket 4 is to left movement, the circulation area between the second valve pocket window 38 and the 6th valve pocket window 42 reduces, and the circulation area between the 4th valve pocket window 40 and the 8th valve pocket window 44 reduces.Oil hydraulic cylinder is in vibration processes, and the hydraulic oil that system's fuel feeding flows to A hydraulic fluid port 48 lacks than the hydraulic oil that flows to B hydraulic fluid port 49, and namely the amplitude vibrated left of cylinder body 29 is littler than the amplitude of vibration to the right, reaches the purpose of automatic elimination hydraulic cylinder piston skew.
The content that this specification implements to state is enumerating the way of realization of inventive concept; concrete mode shown in protection scope of the present invention should not be regarded as being confined to implement, and should be involved in those skilled in the art conceive according to the present invention the equivalent technologies mode that can think deeply.
Claims (5)
1. can eliminate the rotary valve device that hydraulic cylinder piston is offset automatically for one kind, it is characterized in that: comprise valve body, spool, first valve pocket, second valve pocket, first end cap and second end cap, be provided with first boss, second boss, the 3rd boss and the 4th boss at spool, the 3rd boss, first boss, second boss and the 4th boss are arranged to the direction of second end cap successively along first end cap; Second end of spool runs through and stretches out second end cap; Second end of described spool is connected with the main shaft of motor by coupling or is connected with the rotor of rotation proportion electro-magnet;
Form first chamber between first boss of described spool and second boss, have the P filler opening that first chamber is communicated with oil supply system on the valve body wall at place, first chamber; Form second chamber between first boss and the 3rd boss, have the T that second chamber is communicated with mailbox on the valve body wall at place, second chamber
1Return opening; Form the 3rd chamber between second boss and the 4th boss, have the T that the 3rd chamber is communicated with mailbox on the valve body wall at place, the 3rd chamber
2Return opening;
Have the A hydraulic fluid port that can be communicated with actuator on the valve body wall at the first boss place of described spool, have the B hydraulic fluid port that can be communicated with actuator on the valve body wall at the second boss place of described spool;
On one side end face of described first boss along the circumferential direction the compartment of terrain have and can make T
1First groove that return opening is communicated with the A hydraulic fluid port, on the opposite side end face of described first boss along the circumferential direction the compartment of terrain have second groove that the P filler opening is communicated with the A hydraulic fluid port; On one side end face of described second boss along the circumferential direction the compartment of terrain have the 3rd groove that the P filler opening is communicated with the B hydraulic fluid port, on the opposite side end face of described second boss along the circumferential direction the compartment of terrain have and can make T
2The 4th groove that return opening is communicated with the B hydraulic fluid port; First groove along the circumferential direction alternately is staggeredly arranged with the corresponding orthographic projection of second groove on the projection plane vertical with the medial axis of spool, the 3rd groove along the circumferential direction alternately is staggeredly arranged with the corresponding orthographic projection of the 4th groove on the projection plane vertical with the medial axis of spool, first groove is overlapped with the orthographic projection of the 3rd groove on the projection plane vertical with the medial axis of spool, and second groove is overlapped with the orthographic projection of the 4th groove on the projection plane vertical with the medial axis of spool;
On the interior edge face of first end cap along the circumferential direction the compartment of terrain be provided with first projection, first end face of first valve pocket along the circumferential direction compartment of terrain is provided with first aperture, described first projection is inserted in described first aperture correspondingly, is transition fit between first projection and first aperture; Along the circumferential direction go up the compartment of terrain on the interior edge face of second end cap and be provided with second projection, second end face of first valve pocket along the circumferential direction compartment of terrain is provided with second aperture, described second projection is inserted in described second aperture correspondingly, is transition fit between second projection and second aperture;
First valve pocket is installed on the outer surface of spool, is Spielpassung between first valve pocket and the spool; Second valve pocket is installed on the outer surface of first valve pocket, and second valve pocket can be with respect to first valve pocket axially moving back and forth along first valve pocket;
First valve pocket has the corresponding first valve pocket window, the second valve pocket window, the 3rd valve pocket window and the 4th valve pocket window in the position at described first groove, second groove, the 3rd groove and the 4th groove place, the first valve pocket window, the second valve pocket window, the 3rd valve pocket window are overlapped with the orthographic projection of the 4th valve pocket window on the projection plane vertical with the medial axis of spool; Second valve pocket has corresponding the 5th valve pocket window, the 6th valve pocket window, the 7th valve pocket window and the 8th valve pocket window in the position at the first valve pocket window, the second valve pocket window, the 3rd valve pocket window and the 4th valve pocket window place; The 5th valve pocket window, the 6th valve pocket window, the 7th valve pocket window are overlapped with the orthographic projection of the 8th valve pocket window on the projection plane vertical with the medial axis of spool;
Form the 4th chamber between first end face of described second valve pocket and the interior edge face of first end cap, have first hydraulic fluid port on the valve body wall at place, the 4th chamber; Form the 5th chamber between second end face of second valve pocket and the interior edge face of second end cap, have second hydraulic fluid port on the valve body wall at place, the 5th chamber; Can move along the axial direction to second end cap of first valve pocket under the hydraulic oil of second valve pocket in the 4th chamber promotes, can move along the axial direction to first end cap of first valve pocket under the promotion of the hydraulic oil of second valve pocket in the 5th chamber;
The piston upper edge piston of oil hydraulic cylinder be axially arranged with the 5th step and the 6th step, form the 6th chamber between described the 5th step and the 6th step, have the 7th hydraulic fluid port that can be connected with oil supply system on the cylinder body at place, the 6th chamber; The cylinder body of the oil hydraulic cylinder at described the 5th step place is provided with the 3rd hydraulic fluid port and the 4th hydraulic fluid port, forms zero lap between described the 5th step, the 3rd hydraulic fluid port and the 4th hydraulic fluid port three; The cylinder body of the oil hydraulic cylinder at described the 6th step place is provided with the 5th hydraulic fluid port and the 6th hydraulic fluid port, forms zero lap between described the 6th step, the 5th hydraulic fluid port and the 6th hydraulic fluid port three;
The cylinder body of and oil hydraulic cylinder motionless when the piston of oil hydraulic cylinder moves or motionless and piston oil hydraulic cylinder of the cylinder body of oil hydraulic cylinder when moving to the 5th boss place direction to the 6th boss place direction, and described first hydraulic fluid port is communicated with the 4th hydraulic fluid port on the cylinder body and described second hydraulic fluid port is communicated with the 6th hydraulic fluid port on the cylinder body; The cylinder body of and oil hydraulic cylinder motionless when the piston of oil hydraulic cylinder moves or motionless and piston oil hydraulic cylinder of the cylinder body of oil hydraulic cylinder when moving to the 6th boss place direction to the direction at the 5th boss place, and described first hydraulic fluid port is communicated with the 3rd hydraulic fluid port on the cylinder body and described second hydraulic fluid port is communicated with the 5th hydraulic fluid port on the cylinder body.
2. the rotary valve device that can eliminate hydraulic cylinder piston skew automatically according to claim 1, it is characterized in that: described first groove and/or second groove evenly distribute along the circumferencial direction of the end face of described first boss, and the 3rd groove and/or the 4th groove are along evenly distributing on the circumferencial direction of the end face of described second boss.
3. the rotary valve device that can eliminate hydraulic cylinder piston skew automatically according to claim 1 and 2, it is characterized in that: the described first valve pocket window, the second valve pocket window, the 3rd valve pocket window and the 4th valve pocket window evenly distribute along the circumferencial direction of described first valve pocket respectively separately; Described the 5th valve pocket window, the 6th valve pocket window, the 7th valve pocket window and the 8th valve pocket window evenly distribute along the circumferencial direction of described second valve pocket respectively separately; The described first valve pocket window is communicated with the 5th valve pocket window, and the described second valve pocket window is communicated with the 6th valve pocket window, and described the 3rd valve pocket window is communicated with the 7th valve pocket window, and described the 4th valve pocket window is communicated with the 8th valve pocket window.
4. the rotary valve device that can eliminate hydraulic cylinder piston skew automatically according to claim 1 and 2, it is characterized in that: also comprise first caging bolt and second caging bolt, described first caging bolt is threaded with first end cap, and first caging bolt stretches into described the 4th chamber; Described second caging bolt is threaded with second end cap, and second caging bolt stretches into described the 5th chamber.
5. the rotary valve device that can eliminate hydraulic cylinder piston skew automatically according to claim 3, it is characterized in that: also comprise first caging bolt and second caging bolt, described first caging bolt is threaded with first end cap, and first caging bolt stretches into described the 4th chamber; Described second caging bolt is threaded with second end cap, and second caging bolt stretches into described the 5th chamber.
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| CN201310265250.3A CN103291962B (en) | 2013-06-26 | 2013-06-26 | Rotary valve device capable of automatically eliminating hydraulic cylinder piston offset |
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| CN201310265250.3A CN103291962B (en) | 2013-06-26 | 2013-06-26 | Rotary valve device capable of automatically eliminating hydraulic cylinder piston offset |
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| CN103291962B CN103291962B (en) | 2015-05-20 |
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| CN103438243A (en) * | 2013-09-24 | 2013-12-11 | 淮海工学院 | Incremental electro-hydraulic digital flow control valve with double valve cores rotating oppositely |
| CN103671328A (en) * | 2013-12-21 | 2014-03-26 | 浙江大学 | Automatic reversing rotary valve |
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| CN109578624A (en) * | 2018-12-20 | 2019-04-05 | 油威力液压科技股份有限公司 | A kind of fluid automatic controlling reversing arrangement |
| CN110553081A (en) * | 2019-09-29 | 2019-12-10 | 上海羿弓精密科技有限公司 | Hydraulic reversing valve and hydraulic reversing device |
| CN110608298A (en) * | 2019-09-25 | 2019-12-24 | 昆山海芯机电科技有限公司 | Manual reversing valve with enhanced sealing |
| CN116498623A (en) * | 2023-03-29 | 2023-07-28 | 邵阳先进制造技术研究院有限公司 | High-precision control valve for moving cylinder |
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| CN110608298A (en) * | 2019-09-25 | 2019-12-24 | 昆山海芯机电科技有限公司 | Manual reversing valve with enhanced sealing |
| CN110553081A (en) * | 2019-09-29 | 2019-12-10 | 上海羿弓精密科技有限公司 | Hydraulic reversing valve and hydraulic reversing device |
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| CN116498623B (en) * | 2023-03-29 | 2023-12-15 | 邵阳先进制造技术研究院有限公司 | High-precision control valve for moving cylinder |
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Inventor after: Gong Guofang Inventor after: Zhou Hongbin Inventor after: Han Dong Inventor after: Liu Yi Inventor after: Zhou Tianyu Inventor after: Yang Huayong Inventor before: Gong Guofang Inventor before: Zhou Hongbin Inventor before: Han Dong Inventor before: Liu Yi Inventor before: Yang Huayong |
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Free format text: CORRECT: INVENTOR; FROM: GONG GUOFANG ZHOU HONGBIN HAN DONG LIU YI YANG HUAYONG TO: GONG GUOFANG ZHOU HONGBIN HAN DONG LIU YI ZHOU TIANYU YANG HUAYONG |
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