CN104154068A - Corner self-servo valve control annular cylinder - Google Patents
Corner self-servo valve control annular cylinder Download PDFInfo
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- CN104154068A CN104154068A CN201410385707.9A CN201410385707A CN104154068A CN 104154068 A CN104154068 A CN 104154068A CN 201410385707 A CN201410385707 A CN 201410385707A CN 104154068 A CN104154068 A CN 104154068A
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Abstract
A corner self-servo valve control annular cylinder comprises a cylinder body of an annular hydraulic cylinder and a connecting disc (6). The annular hydraulic cylinder comprises an upper end cover (2), a lower end cover (18), an annular piston rod (14), a fixing check block (16), an output shaft (22) and a valve element shaft hole (30) formed in the center of the upper end cover. The upper end cover (2) of the annular hydraulic cylinder is connected with the connecting disc (6) through bolts (25), a valve bush cavity (31) is formed in the upper end cover (2), a valve bush (10) is arranged in the valve bush cavity (31), the valve bush (10) is fixedly connected with the annular piston rod (14) and the output shaft (22) through pins (20), a valve element (12) is arranged inside the valve bush (10), the upper end of the valve element (12) penetrates through the shaft hole and is fixedly connected with a servo motor (11) located in the connecting disc (6), the valve bush (10) and the valve element (12) are in movable fit, and the axis of the upper end cover (2), the axis of the annular piston rod (14), the axis of the valve bush (10), the axis of the valve element (12), the axis of the output shaft (22), the axis of the connecting disc (6) and the axis of the servo motor (11) are located on the same straight line. The corner self-servo valve control annular cylinder has the advantages of being convenient to manufacture, compact in structure, low in fault rate, good in sealing performance and dynamic property, long in service life and large in flow.
Description
Technical field
The present invention relates to oil hydraulic cylinder technical field, specifically a kind of corner self-servo valve control annular cylinder.
Background technique
Oil hydraulic cylinder is element indispensable in hydraulic control system, and it can be converted into the high-power of hydraulic pressure output by the small-power of motor input, to equipment is carried out to high-power stable output.
At present, by the straight reciprocating motion of traditional oil hydraulic cylinder be converted into oscillating motion conventional be the swing cylinder of rack structure, the principle of swing cylinder is by rack drives gear by the to-and-fro motion of oil hydraulic cylinder, change into forward and reverse swing rotary of gear shaft, and then the thrust of reciprocal oil hydraulic cylinder is converted to the output torque of gear shaft.But the rate of fault of the swing cylinder of rack structure is higher and volume ratio is larger, common fault has the fracture of cylinder barrel fixing bolt, oil cylinder internal leakage, the Luo Xinwei of Nanjing Mei Shan Iron And Steel Company hot strip plant is at " gear-and-rack swing hydraulic cylinder working principle and trouble analysis " (Luo Xinwei, gear-and-rack swing hydraulic cylinder working principle and trouble analysis, plum mountain science and technology, 2012,3:52-53) in a literary composition by introducing the working principle of gear-and-rack swing hydraulic cylinder, analyze and cause the major reason of gear-and-rack swing hydraulic cylinder fault.The swing cylinder of rack structure is owing to being the combination of oil hydraulic cylinder and rack structure, so it is very high in processing and assembling requirement above, makes the user cost of swing cylinder of rack structure higher.
The servo valve-controlled cylinder of corner is generally double-leaf swing cylinder and actuating motor has coordinated servo action, but general double-leaf swing cylinder exists rotating shaft radial force imbalance, poor sealing performance, complex structure.For spool radial force imbalance problem, the scholar Jiang Lin of Wuhan University Of Technology etc. has designed the servovalve structure (Jiang Lin of a kind of P mouth and the paired perpendicular quadrature distribution of T mouth, Chen Xinyuan, Zhao Hui, Zeng Liangcai, Jin Xiaohong, Xie Zhen. based on the servo hydraulic knuckle research of hydraulic corner. electromechanical engineering, 2011,28 (3): 265-268+309.).This valve core of servo valve balanced radial force, spool resistance reduce to some extent, but also exist spool to have one end easily to form the problem of dead space simultaneously, in the time that the operating time is longer, cannot flow out and can produce larger axis to power to spool because leaking oil, spool dynamic property is not very desirable, and servo blind area improves to some extent but be also undesirable; The paired perpendicular quadrature of P mouth and T mouth distributes and has solved spool radial force imbalance problem, but has brought the dark oil duct of valve inner to be difficult to prepare, be difficult to the difficult problems such as processing simultaneously.
Summary of the invention
The present invention is intended to solve in oil hydraulic cylinder field directly output torque, sealing and servo problem, proposes a kind of manufacture, compact structure, good airproof performance, failure rate is low, dynamic property is good, the life-span is long, flow is large corner self-servo valve control annular cylinder be convenient to.
A kind of corner self-servo valve control annular cylinder, comprises annular hydraulic cylinder cylinder body and land, and annular hydraulic cylinder comprises upper end cap, ring piston rod, fixed stop, output shaft, is opened in the axis hole at upper end cap center; The upper end cap of annular hydraulic cylinder is connected by bolt with land, in described upper end cap, offer valve pocket chamber, valve pocket is provided with valve pocket in chamber, valve pocket is fixed together by pin and ring piston rod and output shaft, spool is placed in valve pocket inside, the upper end of spool is fixedly connected with the actuating motor that is positioned at land through axis hole, and valve pocket and spool coordinate for moving, and the axle center of upper end cap, ring piston rod, valve pocket, spool, output shaft, land, actuating motor is located along the same line; On described upper end cap, also have four oil ducts, the first oil duct, two hydraulic fluid ports that the second oil duct is corresponding are symmetrically distributed in spool axis hole both sides, and the 3rd oil duct, two hydraulic fluid ports that the 4th oil duct is corresponding are distributed in the both sides of fixed stop and are staggered up and down and are distributed between oil hydraulic cylinder oil pocket and valve pocket chamber.
Described valve pocket external diameter nominal size is identical with height nominal size with the external diameter nominal size in valve pocket chamber with height nominal size, and valve pocket internal diameter nominal size is identical with spool lower end diameter nominal size, and valve pocket coordinates for moving with valve pocket chamber; Valve pocket outer wall has four oil grooves, the cross section of four oil grooves is all rectangle, in four oil grooves, have four rectangle hydraulic fluid ports that run through valve pocket, hydraulic fluid port in the first oil groove and the 3rd oil groove be a pair of and hydraulic fluid port center line at grade, hydraulic fluid port in the second oil groove and the 4th oil groove be a pair of and center line at grade, the first oil groove is mutually vertical with the hydraulic fluid port center line in the 4th oil groove with the second oil groove with the hydraulic fluid port center line in the 3rd oil groove.
Described spool lower end diameter nominal size is identical with valve pocket internal diameter nominal size, spool upper end diameter nominal size is identical with poppet shaft bore dia nominal size, spool middle part has four fan grooves, the distance nominal size of the lower end surface of upper-end surface to the four oil grooves of the height nominal size of fan groove and the first oil groove is identical, fan-shaped corresponding central angle is 90 °, fan-shaped radius is r, and in oil groove, the width of hydraulic fluid port is a, and spool lower end radius is r
0, r meets following formula:
。
Described annular hydraulic cylinder, comprises upper end cap and lower end cap, and described upper end cap is connected by the screw bolt and nut of six even circle distribution with lower end cap; Described upper end cap and lower end cap inside are provided with annular oil hydraulic cylinder oil pocket, ring piston rod, piston and fixed stop, also include one end and be connected with upper end cap, the other end stretches out the output shaft of lower end cap outside then through ring piston rod, lower end cap successively; Described fixed stop is fixed on the inwall of oil hydraulic cylinder oil pocket, and fixed stop coordinates for moving with ring piston rod; Described piston fixes as one with ring piston rod and coordinates for moving with oil hydraulic cylinder oil pocket, and piston and fixed stop are symmetrical in the both sides of the vertical guide of upper end cap medial axis; Together with ring piston rod is fixed by a pin to output shaft; Valve pocket external diameter nominal size is identical with height nominal size with the external diameter nominal size in valve pocket chamber with height nominal size, and valve pocket coordinates for moving with valve pocket chamber, is provided with the 5th seal ring between valve pocket and valve pocket chamber.
The external diameter nominal size of described land is identical with upper end cap upper end diameter nominal size, and has the bolt hole of six even circle distribution; In the middle of land, have actuating motor groove and axis hole, the radius nominal size of axis hole is identical with spool upper end radius nominal size; Between actuating motor groove and bolt hole, have two oil ducts, two oil ducts are symmetrical in the axis of land.
Between described upper end cap and lower end cap, seal by the first seal ring, the outer surface medial axis place of piston is provided with the second seal ring, is provided with the 3rd seal ring between ring piston rod and upper end cap, is provided with the 4th seal ring between ring piston rod and lower end cap.
The radius nominal size of described ring piston rod is the mean value of external diameter nominal size and the internal diameter nominal size of oil hydraulic cylinder oil pocket.
The center line of described piston is one section of circular arc, and the axial cross section of piston is circular.The radial cross section radius nominal size of described piston is identical with the radial cross section radius nominal size of oil hydraulic cylinder oil pocket, and the outer surface of piston is provided with the second seal groove.
Described upper end cap is respectively equipped with first chamber, the 3rd seal groove, the valve pocket chamber of the first coaxial seal groove, oil hydraulic cylinder oil pocket from outside to inside; Between first chamber of oil hydraulic cylinder oil pocket and valve pocket chamber, be provided with first chamber of ring rod end chamber; Described lower end cap is identical with the external diameter nominal size of upper end cap, and lower end cap is respectively equipped with second chamber, the 4th seal groove, the output shaft hole of the first coaxial seal groove, oil hydraulic cylinder oil pocket from outside to inside; Between second chamber of oil hydraulic cylinder oil pocket and output shaft hole, be provided with second chamber of ring rod end chamber.
The radial cross section radius nominal size of described fixed stop is identical with the radial cross section radius nominal size of oil hydraulic cylinder oil pocket; Symmetrical line along fixed stop and ring piston rod surface of contact has seal strip groove, and the length nominal size of seal strip groove is identical with symmetrical line length nominal size.
The advantage of corner self-servo valve control annular cylinder of the present invention is:
1) what the present invention adopted in sealing is seal ring, and seal ring has better sealing characteristics and kinetic characteristic with respect to Stamping Steel Ribbon, makes the leakage of oil hydraulic cylinder hydraulic oil in high-voltage operation situation obtain good control;
2) the present invention does not have rack combination, simple and compact for structure, and volume is little, and output torque is large, and available area is wide; Meanwhile reduce cost, reduced rate of fault;
3) valve pocket of the present invention and valve core structure are simple, are easy to process spool balanced radial force, reduce rate of fault, increase the stability of system, extend spool valve pocket working life, have meanwhile also effectively increased the flow of valve pocket spool;
4) oil channel structure involved in the present invention is simple, forms at most by two sections, significantly reduces difficulty of processing and cost.
Therefore, the present invention has manufacture, compact structure, failure rate is low, good airproof performance, dynamic property is good, the life-span is long, flow the is large feature be convenient to.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the plan view of Fig. 1;
Fig. 3 is land structural representation;
Fig. 4 is the B-B cross-sectional view of Fig. 3;
Fig. 5 is the structural representation of upper end cap;
Fig. 6 is the C-C cross-sectional view of Fig. 5;
Fig. 7 is the D-D cross-sectional view of Fig. 5;
Fig. 8 is the structural representation of lower end cap;
Fig. 9 is the E-E cross-sectional view of Fig. 8;
Figure 10 is the structural representation of ring piston rod;
Figure 11 is the F-F cross-sectional view of Figure 10;
Figure 12 is the structural representation of output shaft;
Figure 13 is the worm's eye view of Figure 12;
Figure 14 is spool and valve pocket assembly structure schematic diagram;
Figure 15 is the left view of Figure 14;
Figure 16 is the worm's eye view of Figure 14;
Figure 17 is the plan view of Figure 14;
Figure 18 is the G-G cross-sectional view of Figure 14;
Figure 19 is the H-H cross-sectional view of Figure 15;
Figure 20 is the I-I cross-sectional view of Figure 19;
Figure 21 is the structural representation of piston;
Figure 22 is the J-J cross-sectional view of Figure 21;
Figure 23 is the structural representation of fixed stop;
Figure 24 is the K-K cross-sectional view of Figure 23;
Figure 25 is the perspective view of piston.
In figure, 1 is bolt, 2 is upper end cap, 3 is the second seal ring, 4 is piston, 5 is the 3rd seal ring, 6 is land, 7 is the 6th seal ring, 8 is the first oil duct, 9 is the 5th seal ring, 10 is valve pocket, 11 is actuating motor, 12 is spool, 13 is the second oil duct, 14 is ring piston rod, 15 is Stamping Steel Ribbon, 16 is fixed stop, 17 is the first seal ring, 18 is lower end cap, 19 is the 4th seal ring, 20 is pin, 21 is deep groove ball bearing, 22 is output shaft, 23 is nut, 24 is oil hydraulic cylinder oil pocket, 25 is bolt, 26 bolts hole, 27, 30 is spool axis hole, 28, 36 is bolt hole, 29, 37 is the first seal groove, 31 is valve pocket chamber, 32, 41 is the 3rd seal groove, 33 is the 3rd oil duct, 34 is the 4th oil duct, 35 is bolt hole, 38, 43 is the 4th seal groove, 39 is output shaft hole, 40 is piston groove, 42 is auxiliary hole, 44, 45 is pin hole, 46, 47, 48, 53 is oil diverting port, 49 is the first oil groove, 50 is the second oil groove, 51 is the 3rd oil groove, 52 is the 4th oil groove, 54 is the second seal groove, 55 is seal strip groove.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described: as shown in Fig. 1-2 5, a kind of corner self-servo valve control annular cylinder, is made up of upper end cap 2, lower end cap 18, valve pocket 10, spool 12, ring piston rod 14, piston 4, fixed stop 16 and output shaft 22;
As depicted in figs. 1 and 2, upper end cap 2 is connected with nut 23 by the bolt 1 of six even circle distribution with lower end cap 18.Oil hydraulic cylinder oil pocket 24 is to be combined by upper end cap 2 and lower end cap 18, between upper end cap 2 and lower end cap 18, seals with the first seal ring 17.As shown in Figure 3 and Figure 4, land 6 is connected by the bolt 25 of six even circle distribution with upper end cap 2.
As shown in Figure 1, fixed stop 16 is fixed on the inwall of oil hydraulic cylinder oil pocket 24, fixed stop 16 coordinates for moving with ring piston rod 14, piston 4 is affixed with ring piston rod 14, piston 4 coordinates for moving with oil hydraulic cylinder oil pocket 24 together with ring piston rod 14, piston 4 radial symmetric faces are equipped with the second seal ring 3, piston 4 and fixed stop 16 are symmetrical in the both sides of the vertical guide of axis, upper end cap 2 has two hydraulic fluid ports 8,13, two oil ducts 32,33, two hydraulic fluid ports 8,13 are symmetrically distributed in axis hole 30 both sides, and two oil ducts 32,33 are distributed in the both sides of fixed stop 16; Valve pocket 10, ring piston rod 14 are fixed together by pin 20 with output shaft 22, valve pocket 10 is assemblied in the valve pocket chamber 31 of upper end cap 2, the axle center of ring piston rod 14 and output shaft 22 is on same straight line, between ring piston rod 14 and upper end cap 2, be provided with the 3rd seal ring 5, between ring piston rod 14 and lower end cap 18, be provided with the 4th seal ring 19.
As shown in Fig. 5, Fig. 6 and Fig. 7, upper end cap 2 is respectively equipped with six equally distributed bolts hole 28, the first seal groove 29, first chamber of oil hydraulic cylinder oil pocket 24, the 3rd seal groove 32, chamber, valve pocket chamber 31 from outside to inside, and their axis is on same straight line.Between first chamber of oil hydraulic cylinder oil pocket 24 and chamber, valve pocket chamber 31, be provided with first chamber of rod end chamber.Upper end cap 2 has the first oil duct 8, the second oil duct 13, the 3rd oil duct 32 and the 4th oil duct 33, the hydraulic fluid port of the first oil duct 8 and the second oil duct 13 correspondences is symmetrically distributed in axis hole 30 both sides, and the hydraulic fluid port of the 3rd oil duct 32 and the 4th oil duct 33 correspondences is distributed in the both sides of fixed stop 16 and is staggered up and down and is distributed between oil hydraulic cylinder oil pocket 24 and valve pocket chamber 31.
Described oil hydraulic cylinder oil pocket 24 is annular, and oil hydraulic cylinder oil pocket 24 is made up of with second chamber of the oil hydraulic cylinder oil pocket 24 that is positioned at lower end cap 18 first chamber of the oil hydraulic cylinder oil pocket 24 that is positioned at upper end cap 2.First chamber of oil hydraulic cylinder oil pocket 24 is between the first seal groove 29 and the 3rd seal groove 32, and second chamber of oil hydraulic cylinder oil pocket 24 is between the first seal groove 37 and the 4th seal groove 38.
As shown in Figure 8 and Figure 9, described lower end cap 18 is identical with the external diameter nominal size of upper end cap 2.Lower end cap 18 is respectively equipped with six equally distributed bolts hole 36, the first seal groove 37, second chamber of oil hydraulic cylinder oil pocket 24, the 4th seal groove 38, output shaft hole 39 from outside to inside, and their axis is on same straight line.Between second chamber of oil hydraulic cylinder oil pocket 24 and output shaft hole 39, be provided with second chamber of ring rod end chamber.
As shown in Figure 10 and Figure 11, the radius nominal size of described ring piston rod 14 is a, and the external diameter nominal size of oil hydraulic cylinder oil pocket 24 is b, and the internal diameter nominal size of oil hydraulic cylinder oil pocket 24 is c, and a, b, c meet:
?。
Ring piston rod 14 is arranged in the rod end chamber that upper end cap 2 and lower end cap 18 form, and the axis of the axis of ring piston rod 14 and oil hydraulic cylinder oil pocket 24 is on same straight line.In the middle of ring piston rod 14, have auxiliary hole 42.The edge of ring piston rod 14 has piston groove 40.Between ring piston rod 14 and upper end cap 2, be provided with the 3rd seal ring 5, between ring piston rod 14 and lower end cap 18, be provided with the 4th seal ring 19, correspondingly, ring piston rod 14 upper surfaces offer the 3rd seal groove 41, and lower surface is provided with the 4th seal groove 43.
As shown in Figure 12 and Figure 13, the lower end radius nominal size of output shaft 22 is identical with the radius nominal size of output shaft hole 39, the upper end of output shaft 22 is provided with six equally distributed pin holes 44, and the axis of the axis of output shaft 22 and ring piston rod 14 is on same straight line.
As shown in Figure 14 and Figure 15, the radius nominal size of spool 12 lower ends is identical with the internal diameter nominal size of valve pocket 10, and spool 12 and valve pocket 10 coordinate for moving, and valve pocket 10 and valve pocket chamber 31 coordinate for moving; As shown in Figure 16 and Figure 17, the lower end of valve pocket 10 is provided with six equally distributed pin holes 45, the upper end radius nominal size of spool 12 is identical with the radius nominal size of the spool axis hole 30 of upper end cap 2, and the upper end of spool 12 has actuating motor output shaft hole and keyway; As shown in Figure 18, Figure 19 and Figure 20, valve pocket 10 has four pairs of oil diverting ports 46,47,48,53, and oil diverting port 46 and oil diverting port 47 are 90 ° of circle distribution, and oil diverting port 47 and oil diverting port 48 are 90 ° of circle distribution, and oil diverting port 48 and oil diverting port 53 are 90 ° of circle distribution;
Described spool 12 lower end diameter nominal sizes are identical with valve pocket 10 internal diameter nominal sizes, spool 12 middle parts have four fan grooves, the distance nominal size of the lower end surface of upper-end surface to the four oil grooves 52 of the height nominal size of fan groove and the first oil groove 49 is identical, fan-shaped corresponding central angle is 90 °, fan-shaped radius is r, in oil groove, the width of hydraulic fluid port is a, and spool lower end radius is r
0, r meets following formula:
。
As shown in Figure 21 and Figure 22, the center line of described piston 4 is that one section of circular arc, axial cross section are circle, and the radial cross section radius nominal size of piston 4 is identical with the radial cross section radius nominal size of oil hydraulic cylinder oil pocket 24.The outer surface of piston 4 is provided with the second seal groove 54, and piston 4 is affixed with ring piston rod 14.Piston 4 coordinates for moving with oil hydraulic cylinder oil pocket 24.
As shown in Figure 23 and Figure 24, the radial cross section radius nominal size of described fixed stop 16 is identical with the radial cross section radius nominal size of oil hydraulic cylinder oil pocket 24.Piston 4 and fixed stop 16 are positioned at the both sides of axis of ring piston rod 14 and radial symmetric face at grade, and fixed stop 16 is fixed on the inwall of oil hydraulic cylinder oil pocket 24, and fixed stop 16 coordinates for moving with ring piston rod 14.Fixed stop 16 has symmetrical line with ring piston rod 14 surface of contact, has seal strip groove 55 along symmetrical line, and the length nominal size of seal strip groove 55 is identical with symmetrical line length nominal size.
The present invention is achieved in that the first oil duct 8 and the second oil duct 13 access respectively high-pressure oil duct and low pressure oil duct, be fixed block 16 and piston 4 of annular hydraulic cylinder oil pocket 24 is divided into high-voltage oil cavity and low pressure oil pocket, spool 12 is by actuating motor 11 driven rotary, oil diverting port on valve pocket 10 is all opened, valve pocket 10 inside are divided into two high-voltage oil cavities and two low pressure oil pockets by spool 12, high pressure oil enters the oil diverting port 47 of valve pocket 10 through the first oil duct 8 by high-pressure oil duct, enter oil hydraulic cylinder oil pocket 24 by oil diverting port 46 and oil duct 34 again, between high-voltage oil cavity and low pressure oil pocket, mineralization pressure is poor, piston 4 is moved to low pressure oil pocket, piston 4 drives ring piston rod 14 to move, ring piston rod 14 drives output shaft 22 and valve pocket 10 to rotate, low pressure oil enters the low pressure oil pocket of valve pocket 10 inside by oil duct 33 and oil diverting port 53, then enter the second oil duct 13 by oil diverting port 48 and get back to fuel tank, valve pocket 10 rotates to the hydraulic fluid port on valve pocket 10 is all closed by spool 12, whole process implementation corner servovalve control annular cylinder output torque.
Claims (10)
1. a corner self-servo valve control annular cylinder, comprise annular hydraulic cylinder cylinder body and land (6), annular hydraulic cylinder comprises upper end cap (2), lower end cap (18), ring piston rod (14), fixed stop (16), output shaft (22), is opened in the spool axis hole (30) at upper end cap center, it is characterized in that: the upper end cap (2) of annular hydraulic cylinder is connected by bolt (25) with land (6), in described upper end cap (2), offer valve pocket chamber (31), in valve pocket chamber (31), be provided with valve pocket (10), valve pocket (10) is fixed together by pin (20) and ring piston rod (14) and output shaft (22), spool (12) is placed in valve pocket (10) inside, the upper end of spool (12) is fixedly connected with the actuating motor (11) that is positioned at land (6) through axis hole, valve pocket (10) and spool (12) coordinate for moving, upper end cap (2), ring piston rod (14), valve pocket (10), spool (12), output shaft (22), land (6), the axle center of actuating motor (11) is located along the same line, on described upper end cap (2), also have four oil ducts (8,13,33,34), the first oil duct (8), two hydraulic fluid ports that the second oil duct (13) is corresponding are symmetrically distributed in spool axis hole (30) both sides, and the 3rd oil duct (33), two hydraulic fluid ports that the 4th oil duct (34) is corresponding are distributed in the both sides of fixed stop (16) and are staggered up and down and are distributed between oil hydraulic cylinder oil pocket and valve pocket chamber.
2. corner self-servo valve control annular cylinder as claimed in claim 1, it is characterized in that: described valve pocket (10) external diameter nominal size is identical with height nominal size with the external diameter nominal size of valve pocket chamber (31) with height nominal size, valve pocket (10) internal diameter nominal size is identical with spool (12) lower end diameter nominal size, and valve pocket (10) coordinates for moving with valve pocket chamber (31), valve pocket (10) outer wall has four oil grooves (49, 50, 51, 52), four oil grooves (49, 50, 51, 52) cross section is all rectangle, four oil grooves (49, 50, 51, 52) in, have four rectangle oil diverting ports (46 that run through valve pocket (10), 47, 48, 53), hydraulic fluid port in the first oil groove (49) and the 3rd oil groove (51) be a pair of and hydraulic fluid port center line at grade, hydraulic fluid port in the second oil groove (50) and the 4th oil groove (52) be a pair of and center line at grade, the first oil groove (49) is mutually vertical with the hydraulic fluid port center line in the 4th oil groove (52) with the second oil groove (50) with the hydraulic fluid port center line in the 3rd oil groove (51).
3. corner self-servo valve control annular cylinder as claimed in claim 2, it is characterized in that: described spool (12) upper end diameter nominal size is identical with spool axis hole (30) diameter nominal size, spool (12) middle part has four fan grooves, the distance nominal size of the lower end surface of upper-end surface to the four oil grooves (52) of the height nominal size of fan groove and the first oil groove (49) is identical, fan-shaped corresponding central angle is 90 °, fan-shaped radius is r, in oil groove, the width of hydraulic fluid port is a, and spool (12) lower end radius is r
0, r meets following formula:
。
4. corner self-servo valve control annular cylinder as claimed in claim 1, it is characterized in that: described annular hydraulic cylinder, comprise upper end cap (2) and lower end cap (18), described upper end cap (2) is connected by the screw bolt and nut of six even circle distribution with lower end cap (18); Described upper end cap (2) and lower end cap (18) inside are provided with annular oil hydraulic cylinder oil pocket (24), ring piston rod (14), piston (4) and fixed stop (16), also include one end and be connected with upper end cap (2), the other end stretches out the outside output shaft (22) of lower end cap (18) then through ring piston rod (14), lower end cap (18) successively; Described fixed stop (16) is fixed on the inwall of oil hydraulic cylinder oil pocket (24), and fixed stop (16) coordinates for moving with ring piston rod (14); Described piston (4) fixes as one with ring piston rod (14) and coordinates for moving with oil hydraulic cylinder oil pocket (24), and piston (4) and fixed stop (16) are symmetrical in the both sides of the vertical guide of upper end cap medial axis; Together with ring piston rod (14) is fixed by a pin to output shaft (22); Between valve pocket (10) and valve pocket chamber (31), be provided with the 5th seal ring (9).
5. corner self-servo valve control annular cylinder as claimed in claim 1, it is characterized in that: the external diameter nominal size of described land (6) is identical with upper end cap (2) upper end diameter nominal size, and have the bolt hole of six even circle distribution; In the middle of land (6), have actuating motor groove and axis hole; Between actuating motor groove and bolt hole, have two oil ducts, two oil ducts are symmetrical in the axis of land (6).
6. corner self-servo valve control annular cylinder as claimed in claim 1, it is characterized in that: between described upper end cap (2) and lower end cap (18), seal by the first seal ring (17), the outer surface medial axis place of piston (4) is provided with the second seal ring (3), between ring piston rod (14) and upper end cap (2), be provided with the 3rd seal ring (5), between ring piston rod (14) and lower end cap (18), be provided with the 4th seal ring (19).
7. corner self-servo valve control annular cylinder as claimed in claim 1, is characterized in that: the radius nominal size of described ring piston rod (14) is the mean value of external diameter nominal size and the internal diameter nominal size of oil hydraulic cylinder oil pocket (24).
8. corner self-servo valve control annular cylinder as claimed in claim 1, is characterized in that: the center line of described piston (4) is one section of circular arc, and the axial cross section of piston (4) is circular; The radial cross section radius nominal size of described piston (4) is identical with the radial cross section radius nominal size of oil hydraulic cylinder oil pocket (24), and the outer surface of piston (4) is provided with the second seal groove (54).
9. corner self-servo valve control annular cylinder as claimed in claim 1, is characterized in that: described upper end cap (2) is respectively equipped with first chamber, the 3rd seal groove (32), valve pocket chamber (31) of coaxial the first seal groove (29), oil hydraulic cylinder oil pocket (24) from outside to inside; Between first chamber of oil hydraulic cylinder oil pocket (24) and valve pocket chamber (31), be provided with first chamber of ring rod end chamber; Described lower end cap (18) is identical with the external diameter nominal size of upper end cap (2), and lower end cap (18) is respectively equipped with second chamber, the 4th seal groove (38), the output shaft hole (39) of coaxial the first seal groove (37), oil hydraulic cylinder oil pocket (24) from outside to inside; Between second chamber of oil hydraulic cylinder oil pocket (24) and output shaft hole, be provided with second chamber of ring rod end chamber.
10. corner self-servo valve control annular cylinder as claimed in claim 1, is characterized in that: the radial cross section radius nominal size of described fixed stop (16) is identical with the radial cross section radius nominal size of oil hydraulic cylinder oil pocket (24); Have seal strip groove (55) along fixed stop (16) and the symmetrical line of ring piston rod (14) surface of contact, the length nominal size of seal strip groove (55) is identical with symmetrical line length nominal size.
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| CN201410385707.9A CN104154068B (en) | 2014-08-07 | 2014-08-07 | A kind of corner self-servo valve control annular cylinder |
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| CN201410385707.9A CN104154068B (en) | 2014-08-07 | 2014-08-07 | A kind of corner self-servo valve control annular cylinder |
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| CN104154068B CN104154068B (en) | 2016-05-25 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386405A (en) * | 2018-04-27 | 2018-08-10 | 天津商业大学 | Robot dedicated hydraulic servo motor |
| CN108757619A (en) * | 2018-08-09 | 2018-11-06 | 江苏钧微动力科技有限公司 | Screw thread inserting type rotation is straight to drive electrohydraulic servo valve |
| CN111749943A (en) * | 2020-06-23 | 2020-10-09 | 安徽合力股份有限公司 | Follow-up rotary oil circuit conversion valve |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386405A (en) * | 2018-04-27 | 2018-08-10 | 天津商业大学 | Robot dedicated hydraulic servo motor |
| CN108757619A (en) * | 2018-08-09 | 2018-11-06 | 江苏钧微动力科技有限公司 | Screw thread inserting type rotation is straight to drive electrohydraulic servo valve |
| CN111749943A (en) * | 2020-06-23 | 2020-10-09 | 安徽合力股份有限公司 | Follow-up rotary oil circuit conversion valve |
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|---|---|
| CN104154068B (en) | 2016-05-25 |
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Application publication date: 20141119 Assignee: Shenzhen Beiteer Electromechanical Co., Ltd. Assignor: Wuhan University of Science and Technology Contract record no.: 2016440020088 Denomination of invention: Corner self-servo valve control annular cylinder Granted publication date: 20160525 License type: Exclusive License Record date: 20160919 |
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Effective date of registration: 20181205 Address after: 430081 No. 743 Peace Avenue, Qingshan District, Wuhan City, Hubei Province Patentee after: Wuhan University of Science and Technology Asset Management Co., Ltd. Address before: 430081 construction of Qingshan District, Hubei, Wuhan Patentee before: Wuhan University of Science and Technology |