Rotary flapper fluidic electro-hydraulic servo pressure regulating valve

Abstract

The application provides a rotary baffle jet electro-hydraulic servo pressure regulating valve, which comprises a shell, a rubber sealing ring, a rubber sealing plug, a rotation limiter, a rotating piston and an upper end cover. The shell is connected with the upper end cover through bolt holes and upper end cover bolt holes, the annular rubber sealing ring is arranged between the shell and the upper end cover, the bottom cylindrical table of the rotation limiter is connected with the cylindrical groove of the shell, the rotating piston cylindrical groove of the rotation limiter is connected with the upper and lower cylindrical bodies of the rotating piston, the upper end surface of the rotation limiter is in contact with the upper end cover end surface of the upper end cover, the first and second bosses of the rotation limiter are respectively connected with the first and second half annular grooves of the upper end cover, and the cylindrical surface of the rotation limiter is in contact with the upper end cover central groove of the upper end cover. The oil liquid return system is integrated into the valve body and matched with the piston buffer structure, so that the oil liquid is recycled and the stability of the valve is improved.

Description

Technical Field

[0001] This invention relates to the field of engine speed control technology, and in particular to a rotary baffle jet electro-hydraulic servo pressure regulating valve. Background Technology

[0002] As the "brain" of the engine, the engine speed control system plays a crucial role in regulating the engine's dynamic performance, and the stable adjustment of the engine speed control system is inseparable from the regulation of the hydraulic system. The hydraulic system has irreplaceable advantages such as high load, high stability and fast response, but its disadvantages such as oil contamination, leakage and large size have always been criticized by various industries.

[0003] Existing engine speed control systems often have hydraulic regulating valves with attached pipelines. Excessive pipelines lead to leakage and maintenance / replacement problems. At the same time, the lack of compactness in the structure of each component results in a large hydraulic system size, which is not conducive to lightweight installation. Therefore, it is particularly important to design a pressure regulating valve that retains the advantages of hydraulic systems while maintaining a compact structure. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a rotary baffle jet electro-hydraulic servo pressure regulating valve. The valve's main internal structure comprises different chambers formed by a rubber sealing plug, a rotating piston, and a rotating limiter. Multiple orifices and channels are provided on the rotating piston, allowing the oil to generate different pressures in different chambers during operation. This creates hysteresis, improving system stability. Ultimately, this results in an electro-hydraulic servo pressure regulating valve that is easy to install and maintain, highly reliable, electro-hydraulic servo-regulated, rotary, with integrated oil circuitry, and compact in size.

[0005] This invention provides a rotary baffle jet electro-hydraulic servo pressure regulating valve, comprising a housing, an annular rubber sealing ring, a first rubber sealing plug, a second rubber sealing plug, a rotation limiter, a rotation piston, a third rubber sealing plug, a fourth rubber sealing plug, a sector-shaped rubber sealing ring, a fifth rubber sealing plug, and an upper end cap. Bolt holes on the housing and upper end cap are connected. The annular rubber sealing ring is located between the housing and the upper end cap. The annular rubber sealing ring is respectively provided with a first sector-shaped groove, a second sector-shaped groove, a third sector-shaped groove, and a fourth sector-shaped groove corresponding to the second, third, fifth, and first rubber sealing plugs, respectively. The two ends of the first rubber sealing plug are respectively located inside the first sector groove of the inner outer shell and the first sector groove of the inner upper cover of the upper cover. The two ends of the second rubber sealing plug are respectively located inside the second sector groove of the inner outer shell and the second sector groove of the inner upper cover of the upper cover. The two ends of the third rubber sealing plug are respectively located inside the third sector groove of the inner outer shell and the third sector groove of the inner upper cover of the upper cover. The fourth rubber sealing plug is connected to the convex surface of the upper cover of the upper cover through the gap between the first and second protrusions on the rotating piston. The sector-shaped rubber sealing ring is connected to the fourth sector groove of the inner outer shell. The two ends of the fifth rubber sealing plug are respectively located inside the fifth sector groove of the inner outer shell and the fourth sector groove of the inner upper cover of the upper cover. The bottom cylindrical platform of the rotating piston is connected to the cylindrical groove on the outer shell. The rotating piston groove on the rotating piston is connected to the upper and lower cylindrical bodies of the rotating limiter. The first and second upper end faces of the rotating piston are in contact with the first and second end faces of the upper end cover, respectively. The first and second protrusions on the rotating piston are connected to the first and second semi-annular grooves on the upper end cover, respectively. The upper end face of the rotating limiter is in contact with the upper end cover groove on the upper end cover. The cylindrical surface of the rotating limiter is in contact with the upper end cover groove on the upper end cover. The center groove is in contact with the first and second side end faces of the rotating piston, which are located between the first and second rubber sealing plugs. The first, second, and third side arc surfaces of the rotating piston are in contact with the short arc surfaces of the first, third, and fifth rubber sealing plugs, respectively. The fourth, fourth, and fifth side arc surfaces of the rotating piston are in contact with the first short arc surface, upper end face, and second short arc surface of the second rubber sealing plug, respectively. The third and fourth outer arc surfaces of the rotating piston are in contact with the inner wall of the outer shell, respectively.

[0006] Preferably, the inner surface of the outer shell has a third sector groove, a fifth sector groove, a fourth sector groove, a first sector groove, and a second sector groove arranged clockwise along the arc wall. The fourth sector groove and the fifth sector groove are connected. The inner end face of the outer shell is provided with a valve body inlet, a valve body pressure relief hole, and a valve output hole. The middle part of the inner end face of the outer shell is provided with a cylindrical groove. The upper surface of the outer shell is uniformly provided with an outer shell eaves along the circumference. The center of the outer shell eaves is provided with a bolt hole.

[0007] Preferably, the cylinder of the rotating limiter has a keyway and a central circular groove in the middle, and one side of the cylinder is connected to the protruding plate of the rotating limiter; the included angle formed by the baffle surface of the rotating limiter and the back end surface of the rotating limiter is smaller than the concave angle of the groove of the upper end cover, and the length of the protruding plate of the rotating limiter is greater than the length of the rotating piston jet surface on the rotating piston and smaller than the inner diameter of the outer shell.

[0008] Preferably, the first concave surface, the second concave surface, the third concave surface, the first upper end surface, and the second upper end surface on the rotating piston are in the same plane, and the height of the first boss and the second boss on the rotating piston is lower than the depth of the first semi-annular groove and the second semi-annular groove on the upper end cover.

[0009] Preferably, the opening direction of the first narrow hole on the rotating piston extends from the first outer arc surface to the inner arc surface; the opening direction of the second narrow hole on the rotating piston extends from the inner arc surface to the first side arc surface; the opening direction of the third narrow hole on the rotating piston extends straight from the first inner groove to the fourth side end face; the opening direction of the fourth narrow hole on the rotating piston extends from the jet surface of the rotating piston to the first inner groove; the opening direction of the connecting hole on the rotating piston extends from the second outer arc surface to the fifth side arc surface; and a first narrow passage is provided at the connection between the second inner groove and the first inner groove.

[0010] Preferably, the diameter of the first narrow hole is smaller than the diameter of the valve body inlet, the cross-sectional area of ​​the fourth narrow hole and the first narrow passage is smaller than the cross-sectional area of ​​the second narrow hole and the third narrow hole, and the diameter of the connecting hole is equal to the diameter of the valve body pressure relief hole.

[0011] Preferably, the arcs containing the first and second outer arc surfaces on the rotating piston are concentric and have the same radius, and the arcs containing the first, second, and third side arc surfaces on the rotating piston are concentric and have the same radius.

[0012] Preferably, the upper cover has a uniformly distributed upper cover eaves along its circumference, the upper cover eaves have a bolt hole at their center, the upper cover has a central hole in its middle, the upper cover has a central groove around its central hole, the upper cover central groove and the upper cover recess are connected, the upper cover convex surface is located on the inner ring of the upper cover end face, a second semi-annular groove and a first semi-annular groove are provided between the upper cover convex surface and the upper cover end face, the upper cover convex surface has a threaded hole, and the outer ring of the upper cover end face has a first sector groove, a fourth sector groove, a third sector groove, the upper cover end face and a second sector groove.

[0013] Preferably, the axes of the rotating piston groove on the rotating limiter, the cylindrical surface on the rotating piston, and the central hole of the upper end cover are on the same straight line.

[0014] Preferably, the third side end face of the rotating piston and the first side face of the third rubber sealing plug form a buffer chamber; the second side face of the third rubber sealing plug, the first outer arc surface of the rotating piston, and the first side face of the fifth rubber sealing plug form a high-pressure chamber; the gap between the first and second protrusions of the rotating piston forms a transition chamber; the second side face of the fifth rubber sealing plug, the second outer arc surface of the rotating piston, and the first side face of the first rubber sealing plug form a pressure relief chamber; the second side face of the first rubber sealing plug, the second side end face of the rotating piston, and the first side arc surface of the rotating piston form a secondary area chamber; the first side end face of the rotating piston and the first side face of the second rubber sealing plug form a primary area chamber; the second concave surface of the rotating piston and the first concave surface of the rotating piston form a collection chamber; and the back end face of the rotating limiter of the rotating limiter and the ninth side end face of the rotating piston form a low-pressure chamber.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. This invention integrates the oil return system into the valve body and works in conjunction with the piston buffer structure, which facilitates the utilization and recovery of oil while increasing the stability of the valve. Compared with traditional baffle valves, the structure is more compact and can reduce the overall system volume.

[0017] 2. The rotating piston structure of the present invention enables the use of a control system that is changed from the traditional direct-acting type to a torque type, which can directly form a more reliable feedback adjustment system with the gear train or directly connect to a programmable servo motor for precise control, reducing the difficulty of valve control.

[0018] 3. In this invention, the rotary limiter and the rotary piston jet surface make contact with a smooth plane. This surface contact allows for the formation of an oil film, reducing wear on the baffle and jet surface and improving component lifespan. The overall device structure facilitates installation and disassembly, making subsequent valve body maintenance or parts replacement easier. Attached Figure Description

[0019] Figures 1a-1b This is an overall structural diagram of the rotary baffle jet electro-hydraulic servo pressure regulating valve of the present invention;

[0020] Figure 2 This is a structural diagram of the outer shell of the rotary baffle jet electro-hydraulic servo pressure regulating valve of the present invention;

[0021] Figure 3 This is a structural diagram of all the rubber seals in the rotary baffle jet electro-hydraulic servo pressure regulating valve of the present invention;

[0022] Figures 4a-4b This is a structural diagram of the rotary limiter in the rotary baffle jet electro-hydraulic servo pressure regulating valve of the present invention;

[0023] Figures 5a-5c This is a structural diagram of the rotating piston in the rotary baffle jet electro-hydraulic servo pressure regulating valve of the present invention;

[0024] Figure 6 This is a structural diagram of the upper end cover in the rotary baffle jet electro-hydraulic servo pressure regulating valve of the present invention.

[0025] Figure 7 This is a schematic diagram of the oil flow chamber in the rotary baffle jet electro-hydraulic servo pressure regulating valve of the present invention.

[0026] Key reference numerals:

[0027] 101 housing, 102 annular rubber sealing ring, 103 first rubber sealing plug, 104 second rubber sealing plug, 105 rotation limiter, 106 rotation piston, 107 third rubber sealing plug, 108 fourth rubber sealing plug, 109 sector-shaped rubber sealing ring, 110 fifth rubber sealing plug, 111 upper end cap, 201 bolt hole, 202 valve body inlet, 203 cylindrical groove, 204 third sector-shaped groove of housing, 205 valve body pressure relief hole, 206 fifth sector-shaped groove of housing, 207 valve output hole, 208 fourth sector-shaped groove of housing, 209 first sector-shaped groove of housing, 210 second sector-shaped groove of housing, 211 upper surface of housing, 212 inner end face of housing, 213 eaves of housing, 301 first sector-shaped groove of annular rubber sealing ring. First short arc surface 302, upper end surface 303, second short arc surface 304, fourth rubber sealing plug end face 305, positioning hole 306, second sector groove of annular rubber sealing ring 307, third sector groove of annular rubber sealing ring 308, annular body 309, fourth sector groove of annular rubber sealing ring 310, keyway 401, center circular groove of rotating limiter 402, baffle surface of rotating limiter 403, lower cylinder 404, upper end face of rotating limiter 405, back end face of rotating limiter 406, cylindrical surface 407, protruding plate of rotating limiter 408, third narrow hole 501, first inner groove 502, first concave surface 503, rotating piston jet surface 504, fourth narrow hole 505, circular groove of rotating piston 506, first boss 50 7. Second boss 508, ninth side end face 509, third outer arc surface 510, first upper end face 511, second side arc surface 512, third concave surface 513, first narrow hole 514, second upper end face 515, second inner groove 516, seventh side end face 517, inner arc surface 518, second narrow hole 519, first narrow channel 520, second concave surface 521, first side end face 522, third side arc surface 523, first outer arc surface 524, eighth side end face 525, third side end face 526, second narrow channel 527, bottom cylindrical platform 528, connecting hole 529, bottom end face 530, second side end face 531, fourth outer arc surface 532, first side arc surface 533, fifth side end face 534, second outer arc surface 535. The upper cover has the following features: a sixth side end face 536, a fourth side arc face 537, a fourth side end face 538, a fifth side arc face 539, a first sector-shaped groove 601 on the upper cover, a convex surface 602 on the upper cover, a threaded hole 603, a fourth sector-shaped groove 604 on the upper cover, a second semi-annular groove 605, a first semi-annular groove 606, a third sector-shaped groove 607 on the upper cover, a central groove 608 on the upper cover, a bolt hole 609 on the upper cover, a protruding eave 610 on the upper cover, a central hole 611 on the upper cover, an end face 612 on the upper cover, a groove 613 on the upper cover, a second sector-shaped groove 614 on the upper cover, a buffer chamber 701, a high-pressure chamber 702, a transition chamber 703, a pressure relief chamber 704, a secondary area chamber 705, a primary area chamber 706, a collection chamber 707, and a low-pressure chamber 708. Detailed Implementation

[0028] To fully describe the technical content, structural features, objectives, and effects of this invention, a detailed description will be provided below in conjunction with the accompanying drawings.

[0029] Rotary baffle jet electro-hydraulic servo pressure regulating valve, such as Figures 1a-1b As shown, it includes a housing 101, an annular rubber sealing ring 102, a first rubber sealing plug 103, a second rubber sealing plug 104, a rotation limiter 105, a rotation piston 106, a third rubber sealing plug 107, a fourth rubber sealing plug 108, a fan-shaped rubber sealing ring 109, a fifth rubber sealing plug 110, and an upper end cap 111.

[0030] like Figure 3 As shown, the first rubber sealing plug 103, the second rubber sealing plug 104, the third rubber sealing plug 107, and the fifth rubber sealing plug 110 are all fan-shaped, with their upper and lower bottom surfaces being arc surfaces, and the center of the arc surface being the center of the inner cylindrical surface of the outer shell 101; the fourth rubber sealing plug 108 is semi-annular, with a positioning hole 306 for installing screws at its center, and a fourth rubber sealing plug end face 305 on one side of the positioning hole 306; the fan-shaped rubber sealing ring 109 is fan-shaped, with a fan-shaped through hole for connecting the valve output port 207 in the very center of the fan-shaped rubber sealing ring 109; the annular rubber sealing ring 102 is an annular body 309, the width of which is the same as the width of the upper surface 211 of the outer shell, and the annular rubber sealing ring 102 is a fan-shaped groove of the same size, with the center of the arc of the fan-shaped groove being the center of the annular body 309.

[0031] The bolt hole 201 on the outer shell 101 is connected to the bolt hole 609 on the upper end cover 111 by bolts. The annular rubber sealing ring 102 is located between the outer shell 101 and the upper end cover 111. The annular rubber sealing ring 102 is provided with a first sector groove 301, a second sector groove 307, a third sector groove 308 and a fourth sector groove 310 on the annular rubber sealing ring along the clockwise direction, corresponding to the second rubber sealing plug 104, the third rubber sealing plug 107, the fifth rubber sealing plug 110 and the first rubber sealing plug 103, respectively.

[0032] The two ends of the first rubber sealing plug 103 are respectively fixed to the inside of the first sector groove 209 of the outer shell 101 and the inside of the first sector groove 601 of the upper end cover 111 by industrial sealant. The depth of the first sector groove 209 of the outer shell is less than the height of the first rubber sealing plug 103. The two ends of the second rubber sealing plug 104 are respectively fixed to the inside of the second sector groove 210 of the outer shell 101 and the inside of the second sector groove 614 of the upper end cover 111 by industrial sealant. The depth of the second sector groove 210 of the outer shell is less than the height of the second rubber sealing plug 104. The two ends of the third rubber sealing plug 107 are respectively fixed to the inside of the third sector groove 204 of the outer shell 101 and the inside of the third sector groove 607 of the upper end cover 111 by industrial sealant. The depth of the third sector groove 204 of the outer shell is less than the height of the third rubber sealing plug 107.

[0033] The fourth rubber sealing plug 108 is connected to the upper end cover convex surface 602 of the upper end cover 111 through the gap between the first boss 507 and the second boss 508 on the rotating piston 106. Specifically, the fourth rubber sealing plug 108 is fitted with the upper end cover convex surface 602 by a screw passing through the positioning hole 306 and entering the threaded hole 603. The number and position of the threaded fit can be adjusted according to actual requirements. The first boss 507 and the second boss 508 ensure that the fourth rubber sealing plug 108 can be accurately installed. The shaped rubber sealing ring 109 is connected to the fourth sector groove 208 of the inner shell of the outer shell 101 by industrial sealant. The depth of the fourth sector groove 208 of the outer shell is less than the height of the sector rubber sealing ring 109 to ensure complete sealing when the rotating piston 106 rotates. The two ends of the fifth rubber sealing plug 110 are fixed to the inner shell of the outer shell of the outer shell of the outer shell of the outer shell of the outer shell of the outer shell of the outer shell of the outer shell of the outer shell of the outer shell of the outer shell of the outer shell of the outer shell of the outer shell of the outer shell of the outer shell of the outer shell of the outer shell of the inner shell of the upper end cover of the outer end cover of the outer end cover of the inner end cover of the outer ...

[0034] The bottom cylindrical platform 528 of the rotating piston 106 is connected to the cylindrical groove 203 on the outer shell 101. The bottom end face 530 of the rotating piston 106 is in contact with the inner end face 212 of the outer shell 101. The rotating piston groove 506 on the rotating piston 106 is connected to the upper and lower cylinders 404 of the rotating limiter 105. The first upper end face 511 and the second upper end face 515 on the rotating piston 106 are in contact with the first end face and the second end face of the upper end cover end face 612 of the upper end cover 111, respectively.

[0035] The first protrusion 507 and the second protrusion 508 on the rotating piston 106 are respectively connected to the first semi-annular groove 606 and the second semi-annular groove 605 on the upper end cover 111. The height of the first protrusion 507 and the second protrusion 508 is lower than the depth of the first semi-annular groove 606 and the second semi-annular groove 605. The upper end face 405 of the rotating limiter 105 contacts the upper end cover groove 613 on the upper end cover 111. The cylindrical surface 407 of the rotating limiter 105 contacts the upper end cover center groove 608 on the upper end cover 111.

[0036] The first side end face 522 and the second side end face 531 of the rotating piston 106 are located between the first rubber sealing plug 103 and the second rubber sealing plug 104, and the angle between the first side end face 522 and the second side end face 531 is smaller than the angle between the first rubber sealing plug 103 and the second rubber sealing plug 104, which facilitates the rotating piston 106 to rotate under the restriction of the sealing plug. When the third side end face 526 contacts the side of the third rubber sealing plug 107, the first side end face 522 will contact the side of the second rubber sealing plug 104.

[0037] The first side arc surface 533, the second side arc surface 512, and the third side arc surface 523 of the rotating piston 106 are respectively press-fitted with the short arc surfaces of the first rubber sealing plug 103, the third rubber sealing plug 107, and the fifth rubber sealing plug 110. The fourth side arc surface 537, the fourth side end face 538, and the fifth side arc surface 539 of the rotating piston 106 are respectively press-fitted with the first short arc surface 302, the upper end face 303, and the second short arc surface 304 of the second rubber sealing plug 104. The fifth side end face 534, the sixth side end face 536, the seventh side end face 517, and the eighth side end face 525 of the rotating piston 106 have the same area shape. The third outer arc surface 510 and the fourth outer arc surface 532 of the rotating piston 106 are respectively in contact with the inner wall of the outer shell 101.

[0038] like Figure 2 As shown, the outer shell 101 has a cylindrical thin-walled structure. The inner surface of the outer shell 101 has a third sector-shaped groove 204, a fifth sector-shaped groove 206, a fourth sector-shaped groove 208, a first sector-shaped groove 209, and a second sector-shaped groove 210 arranged clockwise along the arc wall. The third sector-shaped groove 204, the fifth sector-shaped groove 206, the fourth sector-shaped groove 208, the first sector-shaped groove 209, and the second sector-shaped groove 210 are all fan-shaped. The third sector-shaped groove 204, the fifth sector-shaped groove 206, and the first sector-shaped groove 209 have the same shape and size. The fourth sector-shaped groove 208 is connected to the fifth sector-shaped groove 206 but is different in size. The second sector-shaped groove 210 is longer than the other sector-shaped grooves.

[0039] The fourth sector groove 208 and the fifth sector groove 206 of the outer casing are connected. The inner end face 212 of the outer casing is provided with a valve body inlet 202, a valve body pressure relief hole 205, and a valve output hole 207. The valve output hole 207 is a sector-shaped hole. A cylindrical groove 203 is provided in the middle of the inner end face 212 of the outer casing. Three semi-circular outer casing protrusions 213 are evenly provided along the circumference of the upper surface 211 of the outer casing. The center of the outer casing protrusions 213 is provided with an outer casing bolt hole 201 with a through hole. Specifically, the valve body inlet 202 receives high-pressure hydraulic oil that needs to be regulated, the valve body pressure relief hole 205 is connected to the oil tank, and the valve output hole 207 outputs hydraulic oil that has undergone dynamic pressure balancing.

[0040] like Figures 4a-4b As shown, the cylinder of the rotation limiter 105 has a keyway 401 and a central circular groove 402 in the middle. One side of the cylinder is connected to the protruding plate 408 of the rotation limiter. The central circular groove 402 of the rotation limiter is connected to the controller shaft. The keyway 401 is used to ensure synchronous transmission between the controller shaft and the rotation limiter 105. The included angle formed by the baffle surface 403 and the back end surface 406 of the rotation limiter is smaller than the concave angle of the groove 613 of the upper end cover. Therefore, the rotation angle of the rotation limiter 105 is limited by the groove 613 of the upper end cover. The length of the protruding plate 408 of the rotation limiter is greater than the length of the rotating piston jet surface 504 on the rotating piston 106 and smaller than the inner diameter of the outer shell 101.

[0041] The first concave surface 503, the second concave surface 521, the third concave surface 513, the first upper end surface 511 and the second upper end surface 515 on the rotating piston 106 are in the same plane. The height of the first boss 507 and the second boss 508 on the rotating piston 106 is lower than the depth of the first semi-annular groove 606 and the second semi-annular groove 605 on the upper end cover 111.

[0042] like Figures 5a-5c As shown, the rotating piston 106 has five narrow holes and two narrow channels, including a first narrow hole 514, a second narrow hole 519, a third narrow hole 501, a fourth narrow hole 505, a connecting hole 529, a first narrow channel 520, and a second narrow channel 527. The opening direction of the first narrow hole 514 on the rotating piston 106 extends from the first outer arc surface 524 to the inner arc surface 518, and the opening direction of the second narrow hole 519 on the rotating piston 106 extends from the inner arc surface 518 to the first side arc surface 533. The opening direction of the third narrow hole 501 on the piston 106 extends from the first inner groove 502 to the fourth side end face 538. The opening direction of the fourth narrow hole 505 on the rotating piston 106 extends from the rotating piston jet surface 504 to the first inner groove 502. The opening direction of the connecting hole 529 on the rotating piston 106 extends from the second outer arc surface 535 to the fifth side arc surface 539. A first narrow channel 520 is provided at the connection between the second inner groove 516 and the first inner groove 502. The second narrow channel 527 is a buffer hole.

[0043] The diameter of the first narrow orifice 514 is smaller than the diameter of the valve body inlet 202 to achieve a throttling effect. The cross-sectional areas of the fourth narrow orifice 505 and the first narrow passage 520 are smaller than the cross-sectional areas of the second narrow orifice 519 and the third narrow orifice 501 to meet the throttling and pressure change delay effects. The cross-sectional area of ​​the second narrow passage 527 needs to be small enough to achieve a leakage buffering effect. The diameter of the connecting hole 529 is equal to the diameter of the valve body pressure relief hole 205 to meet the complete pressure relief requirements.

[0044] The first outer arc surface 524 and the second outer arc surface 535 on the rotating piston 106 are concentric and have the same radius. The first side arc surface 533, the second side arc surface 512 and the third side arc surface 523 on the rotating piston 106 are concentric and have the same radius.

[0045] like Figure 6 As shown, the upper cover 111 is provided with an upper cover eaves 610 evenly around the circumference. The upper cover eaves 610 and the outer shell eaves 213 have the same size and shape. The shape of the eaves is semi-circular, rhomboid, polygonal or elliptical. The upper cover eaves 610 has an upper cover bolt hole 609 at the center. The upper cover bolt hole 609 is aligned with the outer shell bolt hole 201. The remaining bolt holes are aligned and evenly distributed along the outer wall of the outer shell 101. The number of bolt connections can be adjusted after strength verification. The upper end cover 111 has a central hole 611 in the middle, and a central groove 608 is provided around the central hole 611. The central groove 608 is connected to the recessed groove 613. The convex surface 602 of the upper end cover is located in the inner ring of the end face 612 of the upper end cover. A second semi-annular groove 605 and a first semi-annular groove 606 are provided between the convex surface 602 and the end face 612 of the upper end cover. A threaded hole 603 is provided on the convex surface 602 of the upper end cover. The outer ring of the end face 612 of the upper end cover has a first sector groove 601, a fourth sector groove 604, a third sector groove 607, the end face 612 of the upper end cover, and a second sector groove 614.

[0046] The axes of the rotating piston groove 506 on the rotating limiter 105, the cylindrical surface 407 on the rotating piston 106, and the center hole 611 of the upper end cover on the upper end cover 111 are on the same straight line to ensure external access of the controller shaft.

[0047] like Figure 7As shown, the third side end face 526 of the rotating piston 106 and the first side face of the third rubber sealing plug 107 form a buffer chamber 701; the second side face of the third rubber sealing plug 107, the first outer arc surface 524 of the rotating piston 106, and the first side face of the fifth rubber sealing plug 110 form a high-pressure chamber 702; the gap between the first boss 507 and the second boss 508 of the rotating piston 106 forms a transition chamber 703; and the second side face of the fifth rubber sealing plug 110, the second outer arc surface 535 of the rotating piston 106, and the first side face of the first rubber sealing plug 103 form a pressure relief chamber. 704, the second side surface of the first rubber sealing plug 103, the second side end face 531 of the rotating piston 106, and the first side arc surface 533 of the rotating piston 106 form a secondary area chamber 705; the first side end face 522 of the rotating piston 106 and the first side surface of the second rubber sealing plug 104 form a main area chamber 706; the second concave surface 521 of the rotating piston 106 and the first concave surface 503 of the rotating piston 106 form a collection chamber 707; the rotating limiter back end face 406 of the rotating limiter 105 and the ninth side end face 509 of the rotating piston 106 form a low-pressure chamber 708.

[0048] The following describes a rotary baffle jet electro-hydraulic servo pressure regulating valve of the present invention in further detail with reference to embodiments:

[0049] The specific working process of the electro-hydraulic servo pressure regulating valve of the present invention is as follows:

[0050] First, place the electro-hydraulic servo pressure regulating valve horizontally upwards, and adjust the angle of the rotation limiter 105 according to the required valve outlet pressure. That is, rotate the rotation limiter 105 to a fixed angle. At this time, the fine adjustment of the angle position will adjust the valve outlet pressure through the transmission amplification effect of the hydraulic system.

[0051] Specifically, the angle adjustment of the electro-hydraulic servo pressure regulating valve is transmitted through the controller shaft. There are two adjustment types and four adjustment methods. The advantage of the controller shaft is that it facilitates the disassembly, installation and replacement of parts, and also makes it easy to change the valve's adjustment type when needed.

[0052] There are two adjustment types: input signal adjustment and feedback signal adjustment. The only difference between the two types is whether the adjustment of the rotation limiter 105 is static or dynamic. The first type, input signal adjustment, involves an external input signal transmitted through the controller shaft to change the angle of the rotation limiter 105 to a fixed value. Input signal adjustment includes two methods: precise program adjustment and coarse manual adjustment. Precise program adjustment is controlled by an external servo motor, which precisely adjusts the angle of the rotation limiter 105 using a programmed operation. Coarse manual adjustment involves a combination of a gear train and a ratchet locking system to roughly adjust the angle of the rotation limiter. The second type, feedback signal adjustment, is a negative feedback adjustment. Changes in the pistons of other valves in the subsequent system oil circuit are transmitted back to the controller shaft via the gear train torque, forming a dynamic adjustment of the entire system. Finally, the last type combines input signal adjustment and feedback signal adjustment, achieving both automatic maintenance of the entire system's balance and the ability to accept external signals to change the system's configuration.

[0053] In this specific embodiment, the angle adjustment range of the rotation limiter 105 is limited by the upper end cover groove 613. Through the compression sealing effect of the fourth rubber sealing plug 108, the first inner groove 502 and the second inner groove 516 respectively form the transition cavity 703 and the collection cavity 707; since the areas of the fifth side end face 534, the sixth side end face 536, the seventh side end face 517 and the eighth side end face 525 are equal, the vector sum of the forces exerted by the oil pressure on the rotating piston 106 in the low-pressure chamber 708 and the high-pressure chamber 702 is zero, that is, no torque is applied to the rotating piston 106.

[0054] Next, in this specific embodiment, the input signal adjustment type is selected. After the angle adjustment of the rotation limiter 105 is completed, hydraulic oil is introduced into the electro-hydraulic servo pressure regulating valve through the valve body inlet 202. The hydraulic oil enters the high-pressure chamber 702 through the valve body inlet 202, and then the oil continues to enter the transition chamber 703 through the first narrow hole 514. Since the diameter of the first narrow hole 514 is much smaller than the diameter of the valve body inlet 202, there is a lag in the flow of oil when the valve body rotates and the piston 106 reciprocates, which in turn causes a lag in the pressure between the two chambers, thus improving the stability of the adjustment.

[0055] During the operation of the electro-hydraulic servo pressure regulating valve, the oil in the transition chamber 703 is divided into two parts. The first part enters the secondary area chamber 705 through the second narrow hole 519, and the second part enters the collecting chamber 707 through the first narrow passage 520. Here, pressure hysteresis also exists due to the throttling effect. At the same time, the oil in the collecting chamber 707 is also divided into two parts. The first part flows into the main area chamber 706 through the third narrow hole 501, and the second part enters the fourth narrow hole 505.

[0056] In the initial state of the electro-hydraulic servo pressure regulating valve, the rotating piston jet surface 504 and the rotating limiter baffle surface 403 are not yet in contact. At this time, the pressure in the collecting chamber 707 is discharged outward through the fourth narrow hole 505 to the low-pressure chamber 708, which is connected to the oil tank through the valve body pressure relief hole 205. At this time, the driving force in the secondary area chamber 705 is greater than the driving force in the main area chamber 706, thereby pushing the rotating piston 106 to rotate until the rotating piston jet surface 504 contacts the rotating limiter baffle surface 403. At this time, the pressure in the collecting chamber 707 cannot be discharged to the low-pressure chamber 708 through the fourth narrow hole 505, and the pressure in the collecting chamber 707 gradually increases. Because the area of ​​the rotating piston 106 driven by the pressure in the main area chamber 706 is larger than that of the rotating piston 106 driven by the pressure in the secondary area chamber 706, and the main area chamber 706 is connected to the collection chamber 707, the pressure remains consistent with the pressure lag, and the pressure in the collection chamber 707 can be kept consistent with the pressure in the transition chamber, the rotating piston jet surface 504 of the rotating piston 106 driven by the pressure separates from the rotating limiter baffle surface 403. At that time, the pressure in the collection chamber 707 will be discharged into the low-pressure chamber 708 through the fourth narrow hole 505. After the pressure decreases, the driving force of the pressure in the secondary area chamber 705 will be greater than that in the main area chamber 706, causing the rotating piston 106 to rotate again until the rotating piston jet surface 504 is in contact with the rotating limiter baffle surface 403.

[0057] If the angle position of the rotation limiter 105 is not changed by the input signal of the valve system thereafter, the rotation of the rotating piston 106 will maintain dynamic balance through repeated cycles.

[0058] Finally, in this cyclical dynamic balancing process, since the angle between the sixth end face 536 and the seventh end face 517 is equal to the sector angle of the sector-shaped small hole inside the sector-shaped rubber sealing ring 109, it can be ensured that when the rotating piston 106 performs dynamic balancing, the valve output port 207 can only be connected to one of the chambers, either the pressure relief chamber 704 or the high-pressure chamber 702, at the same time. The pressure relief chamber 704 is connected to the low-pressure chamber 708 through the connecting hole 529. That is, the pressure inside the valve output port can only increase or decrease simultaneously, and the pressure inside the valve output port 207 is dynamically balanced through the cyclical dynamic balancing of the front end of the rotating piston 106. In other words, the pressure at the valve output port can be amplified and adjusted by slightly adjusting the angle of the rotation limiter 105.

[0059] Because the pressure in the high-pressure chamber 702 is very high, some hydraulic oil leaks into the buffer chamber 701. The buffer chamber 701 is connected to the low-pressure chamber 708 through the second narrow passage 527. When the rotating piston 106 rotates, the fluid in the buffer chamber 701 will increase the damping of rotation, achieving a dynamic balance buffering effect and increasing the stability of the overall device.

[0060] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A rotary baffle jet electro-hydraulic servo pressure regulating valve comprising a shell, an annular rubber seal ring, a first rubber seal plug, a second rubber seal plug, a rotation limiter, a rotary piston, a third rubber seal plug, a fourth rubber seal plug, a fan-shaped rubber seal ring, a fifth rubber seal plug and an upper end cover, characterized in that a bolt hole on the shell and an upper end cover bolt hole on the upper end cover are connected, the annular rubber seal ring is located between the shell and the upper end cover, the annular rubber seal ring is provided with an annular rubber seal ring first fan-shaped groove, an annular rubber seal ring second fan-shaped groove, an annular rubber seal ring third fan-shaped groove and an annular rubber seal ring fourth fan-shaped groove corresponding to the second rubber seal plug, the third rubber seal plug, the fifth rubber seal plug and the first rubber seal plug respectively; both ends of the first rubber seal plug are located inside a shell first fan-shaped groove in the shell and an upper end cover first fan-shaped groove in the upper end cover respectively, both ends of the second rubber seal plug are located inside a shell second fan-shaped groove in the shell and an upper end cover second fan-shaped groove in the upper end cover respectively, both ends of the third rubber seal plug are located inside a shell third fan-shaped groove in the shell and an upper end cover third fan-shaped groove in the upper end cover respectively, the fourth rubber seal plug is connected with an upper end cover convex surface of the upper end cover through a gap between a first boss and a second boss on the rotary piston, the fan-shaped rubber seal ring is connected with a shell fourth fan-shaped groove in the shell, both ends of the fifth rubber seal plug are located inside a shell fifth fan-shaped groove in the shell and an upper end cover fourth fan-shaped groove in the upper end cover respectively; a bottom cylindrical boss on the rotary piston is connected with a cylindrical groove on the shell, a rotary piston circular groove on the rotary piston is connected with a lower end cylindrical body on the rotation limiter, a first upper end surface and a second upper end surface on the rotary piston are in contact with a first end surface and a second end surface of an upper end cover end surface of the upper end cover respectively, a first boss and a second boss on the rotary piston are connected with a first half annular groove and a second half annular groove on the upper end cover respectively, a rotation limiter upper end surface on the rotation limiter is in contact with an upper end cover groove on the upper end cover, a cylindrical surface on the rotation limiter is in contact with an upper end cover center groove on the upper end cover, a first side end surface and a second side end surface of the rotary piston are located between the first rubber seal plug and the second rubber seal plug, a first side arc surface, a second side arc surface and a third side arc surface of the rotary piston are in contact with a short arc surface of the first rubber seal plug, the third rubber seal plug and the fifth rubber seal plug respectively, a fourth side arc surface, a fourth side end surface and a fifth side arc surface of the rotary piston are in contact with a first short arc surface, an upper end surface and a second short arc surface of the second rubber seal plug respectively, a third outer arc surface and a fourth outer arc surface of the rotary piston are in contact with an inner wall of the shell respectively. ​ 2. The rotary flapper fluidic electro-hydraulic servo pressure regulating valve according to claim 1, wherein, The inner surface of the shell is arranged clockwise along the circular arc wall with the shell third sector groove, the shell fifth sector groove, the shell fourth sector groove, the shell first sector groove and the shell second sector groove, the shell fourth sector groove and the shell fifth sector groove are connected, the valve body inlet, the valve body pressure relief hole and the valve output hole are arranged on the inner end surface of the shell, the middle part of the inner end surface of the shell is provided with a cylindrical groove, the upper surface of the shell is uniformly provided with a shell eave along the circumference, and the center of the shell eave is provided with a bolt hole.

3. The rotary flapper fluidic electro-hydraulic servo pressure regulating valve according to claim 1, wherein, The middle part of the cylinder of the rotation limiter is provided with a key groove and a rotation limiter center circular groove, and one side of the cylinder is connected with the rotation limiter protruding plate; the included angle formed by the rotation limiter baffle surface and the rotation limiter back end surface is smaller than the concave surface angle of the upper end cover groove, the length of the rotation limiter protruding plate is greater than the length of the upper rotation piston jet surface of the rotation piston and smaller than the inner diameter of the shell.

4. The rotary flapper fluidic electro-hydraulic servo pressure regulating valve according to claim 1, wherein, The first concave surface, the second concave surface, the third concave surface, the first upper end surface and the second upper end surface of the rotation piston are in the same plane, and the height of the first boss and the second boss of the rotation piston is lower than the depth of the first half-ring groove and the second half-ring groove of the upper end cover.

5. The rotary flapper fluidic electro-hydraulic servo pressure regulating valve according to claim 2, wherein, The opening direction of the first narrow hole of the rotation piston is from the first outer arc surface to the inner arc surface, the opening direction of the second narrow hole of the rotation piston is from the inner arc surface to the first side arc surface, the opening direction of the third narrow hole of the rotation piston is from the first inner groove to the fourth side end surface, the opening direction of the fourth narrow hole of the rotation piston is from the rotation piston jet surface to the first inner groove, the opening direction of the communication hole of the rotation piston is from the second outer arc surface to the fifth side arc surface, and the first narrow channel is arranged at the connection position of the second inner groove and the first inner groove.

6. The rotary flapper fluidic electro-hydraulic servo pressure regulating valve according to claim 5, wherein, The diameter of the first narrow hole is smaller than the diameter of the valve body inlet, the cross-sectional area of the fourth narrow hole and the first narrow channel is smaller than the cross-sectional area of the second narrow hole and the third narrow hole, and the diameter of the communication hole is equal to the diameter of the valve body pressure relief hole.

7. The rotary flapper fluidic electro-hydraulic servo pressure regulating valve according to claim 1, wherein, The circular arcs where the first outer arc surface and the second outer arc surface of the rotation piston are located are concentric and have equal radii, and the circular arcs where the first side arc surface, the second side arc surface and the third side arc surface of the rotation piston are located are concentric and have equal radii.

8. The rotary flapper fluidic electro-hydraulic servo pressure regulating valve according to claim 1, wherein, The upper end cover is uniformly provided with an upper end cover eave along the circumference, the center of the upper end cover eave is provided with an upper end cover bolt hole, the middle part of the upper end cover is provided with an upper end cover center hole, the periphery of the upper end cover center hole is provided with an upper end cover center groove, the upper end cover center groove is connected with the upper end cover groove, the upper end cover convex surface is located in the inner ring of the upper end cover end surface, the second half-ring groove and the first half-ring groove are arranged between the upper end cover convex surface and the upper end cover end surface, the upper end cover convex surface is provided with a threaded hole, and the outer ring of the upper end cover end surface is provided with an upper end cover first sector groove, an upper end cover fourth sector groove, an upper end cover third sector groove, an upper end cover end surface and an upper end cover second sector groove.

9. The rotary flapper fluidic electro-hydraulic servo pressure regulating valve according to claim 1, wherein, The axis of the rotation piston upper circular groove, the rotation piston upper cylindrical surface and the upper end cover upper end cover center hole is on the same straight line.

10. The rotary flapper fluidic electro-hydraulic servo pressure regulating valve according to claim 1, wherein, The third side end surface of the rotary piston and the first side surface of the third rubber sealing plug constitute a buffer chamber, the second side surface of the third rubber sealing plug, the first outer arc surface of the rotary piston and the first side surface of the fifth rubber sealing plug constitute a high-pressure chamber, the gap between the first boss and the second boss of the rotary piston constitute a transition cavity, the second side surface of the fifth rubber sealing plug, the second outer arc surface of the rotary piston and the first side surface of the first rubber sealing plug constitute a pressure relief chamber, the second side surface of the first rubber sealing plug, the second side end surface of the rotary piston and the first side arc surface of the rotary piston constitute a secondary area chamber, the first side end surface of the rotary piston and the first side surface of the second rubber sealing plug constitute a main area chamber, the second concave surface of the rotary piston and the first concave surface of the rotary piston constitute an accumulation cavity, and the rotary limiter back end surface of the rotary limiter and the ninth side end surface of the rotary piston constitute a low-pressure chamber.

Images