WO2019210824A1 - 保持架复位行星滚柱螺纹装置 - Google Patents

保持架复位行星滚柱螺纹装置 Download PDF

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Publication number
WO2019210824A1
WO2019210824A1 PCT/CN2019/084917 CN2019084917W WO2019210824A1 WO 2019210824 A1 WO2019210824 A1 WO 2019210824A1 CN 2019084917 W CN2019084917 W CN 2019084917W WO 2019210824 A1 WO2019210824 A1 WO 2019210824A1
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WO
WIPO (PCT)
Prior art keywords
valve
cage
planetary roller
ball
threaded member
Prior art date
Application number
PCT/CN2019/084917
Other languages
English (en)
French (fr)
Inventor
陈继檬
刘晓琦
刘晓璇
Original Assignee
淄博沃泰斯石化设备有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 淄博沃泰斯石化设备有限公司 filed Critical 淄博沃泰斯石化设备有限公司
Priority to EP19797133.6A priority Critical patent/EP3800386B1/en
Priority to CA3070744A priority patent/CA3070744A1/en
Priority to US16/599,834 priority patent/US10920893B2/en
Publication of WO2019210824A1 publication Critical patent/WO2019210824A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0647—Spindles or actuating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
    • F16K31/502—Mechanical actuating means with screw-spindle or internally threaded actuating means actuating pivotable valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/53—Mechanical actuating means with toothed gearing
    • F16K31/535—Mechanical actuating means with toothed gearing for rotating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0605—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor with particular plug arrangements, e.g. particular shape or built-in means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
    • F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
    • F16K5/201—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
    • F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
    • F16K5/204—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the plugs or parts of the plugs mechanically pressing the seals against the housing

Definitions

  • the present disclosure pertains to a screw drive, and more particularly to a cage reset planetary roller threaded device.
  • the valve ball when applied to a large-diameter high-pressure pipe, the valve ball is subjected to a high pressure, and a large frictional force is generated at the contact surface of the thread, which causes an increase in the opening and closing operation torque of the valve, which causes difficulty in operation and severely reduces the working life of the thread.
  • the use of planetary roller screw is the way to solve this technical problem.
  • the usual planetary roller screw requires a rail change slot.
  • the rotation angle of the drive thread is small, usually not more than 360°.
  • the rail change slot is no longer the necessary structure.
  • valve seat movable type positively seals the ball valve.
  • the movement of the valve seat is forced by the valve seat drive wheel with internal thread to drive the externally threaded valve seat to reciprocate with the fixed valve ball.
  • the principle of the planetary roller transmission is basically the same as that of the previous valve flap movement and the valve seat.
  • a cage resetting planetary roller screw device comprising an externally threaded member provided with an external thread and an internally threaded member provided with an internal thread, the external thread and the internal thread a pitch is the same, a plurality of planetary rollers are disposed between the external thread and the internal thread, the planetary roller is provided with a ring groove having the same pitch and the pitch, and the ring groove of the planetary roller is respectively
  • An external thread is engaged with an internal thread, the planetary roller being disposed between the external thread and the internal thread by a cage, the planetary roller being disposed in a roller retaining hole of the cage;
  • the end face is provided with a convex edge, and the externally threaded member and/or the internally threaded member are provided with a threaded bump which is in contact with the convex edge of the retainer in the circumferential direction of the retainer.
  • the holder may be a holder having a convex edge on one side, one end surface of the holder is a first end surface, and the first end surface is provided with a first convex edge, and the screw bump is disposed at the a first bumper of the externally threaded member or the internally threaded member, the first bumper being in contact with the first ledge of the retainer in a circumferential direction of the retainer.
  • the holder may be a holder having a convex edge on both sides, the two end faces of the holder are respectively a first end surface and a second end surface, and the first end surface is provided with a first convex edge, the second The end surface is provided with a second convex edge, the first convex edge and the second convex edge are opposite to each other in a circumferential direction of the cage, the externally threaded member is provided with a first bumper, and the internally threaded member is provided with a first a second bumping block, the first bumper of the externally threaded member is in contact with the first convex edge in a circumferential direction of the cage, and the second bumper of the internally threaded member is in a circumferential direction of the cage Touching the second convex edge.
  • the length of the roller retaining hole corresponds to the length of the planetary roller.
  • the end face of the cage is a spiral end face.
  • the end face of the cage is a helicoid corresponding to the helix of the external or internal thread.
  • the cage reset planetary roller screw device is disposed in a forced seal ball valve
  • the force seal ball valve includes a valve seat and a valve ball
  • the valve ball includes a valve ball body and a valve flap
  • the valve ball body is provided with a screw drive The wheel, the spiral drive wheel is driven by the cage to reset the planetary roller threading device to actuate the valve flap and the valve seat.
  • the cage reset planetary roller screw device is disposed in a forced seal ball valve including a valve ball, a first valve seat and a first drive wheel, the first drive wheel passing through the cage
  • the reset planetary roller threading device drives the first valve seat to engage the valve ball.
  • the utility model has the advantages that the external thread and the internal thread carry the characteristics of the one-way rotational load, and the non-load rotation stroke pushes the cage to accurately reset the planetary roller, so that the planetary roller maintains the correct relationship between the external thread and the internal thread.
  • the starting position of the work ensures the good working condition of the planetary roller screw.
  • the structure is simple and the practical effect is good.
  • Figure 1 is a structural view of the present disclosure
  • Figure 2 is an exploded view of the structure of the present disclosure
  • Figure 3 is a structural view of the retainer and the planetary roller of the present disclosure
  • Figure 4 is an exploded view of the retainer of the present disclosure with a convex edge on one side, the internal threaded member is provided with a first bumper;
  • Figure 5 is an exploded view of the retainer of the present disclosure provided with a convex edge on one side, the externally threaded member is provided with a first bumper;
  • Figure 6 is a schematic view of the operation of the present disclosure, the externally threaded member rotates, pushes the internally threaded member to carry the bearing stroke;
  • Figure 7 is a schematic view of the operation of the present disclosure, the first bumper of the externally threaded member pushes the cage to rotate to the working starting position;
  • Figure 8 is a schematic view of the operation of the present disclosure, the second bumper of the internally threaded member blocks the retainer in the working start position;
  • Figure 9 is a structural view of the present disclosure in a forced sealing ball valve
  • Figure 10 is a structural view of the ball driving mechanism in the forced sealing ball valve shown in Figure 9;
  • Figure 11 is a structural view of the present disclosure in a side valve stem forced sealing ball valve
  • Figure 12 is a structural view showing the valve ball and the valve seat mechanism of the side valve stem forced sealing ball valve shown in Figure 11;
  • Figure 13 is an exploded perspective view showing the structure of the planetary roller screw device in the side valve stem forced sealing ball valve shown in Figure 11;
  • Figure 14 is a schematic view showing the operation of the side valve stem forced sealing ball valve shown in Figure 11, the first driving wheel and the cage are rotated to the closed position;
  • Figure 15 is a schematic view of the operation of the present invention in a side valve stem forced sealing ball valve, the second bumper of the first driving wheel pushes the cage back to the working start position;
  • Figure 16 is a schematic illustration of the operation of the present disclosure in a side valve stem positively sealed ball valve with the first bumper of the valve seat blocking the retainer in a working starting position.
  • a cage resetting planetary roller screw device includes an externally threaded member 10 provided with an external thread 11 and an internally threaded member 20 provided with an internal thread 21, the pitch of the external thread and the internal thread Similarly, a plurality of planetary rollers 31 are disposed between the external thread and the internal thread, and the planetary rollers are provided with a ring groove 32 having the same pitch t and the pitch, and the ring grooves of the planetary rollers are respectively The external thread is engaged with an internal thread, and the planetary roller is disposed between the external thread and the internal thread through a cage, and the planetary roller is disposed in the roller holding hole 33 of the cage.
  • the end surface of the retainer is provided with a convex edge (36 or 37 in the figure), and the externally threaded member and/or the internally threaded member is provided with a threaded bump (12 or 22 in the figure), and the threaded bump is The circumferential direction of the cage is in contact with the convex edge of the cage.
  • the holder may be a holder having a convex edge on one side. As shown in FIG. 4 and FIG. 5, one end surface of the holder is a first end surface 34, and the first end surface is provided with a first protruding edge 36.
  • the bump block is a first bumper (12 in FIG. 4 or 22 in FIG. 5) provided on the externally threaded member or the internally threaded member, the first bumper being in the circumferential direction of the retainer The first ledge of the cage is touched.
  • the holder may also be a holder with a convex edge on both sides. As shown in FIG. 1 to FIG. 3, the two end faces of the holder are respectively a first end face 34 and a second end face 35, and the first end face is provided with a first end.
  • a convex edge 36 the second end surface is provided with a second convex edge 37, the first convex edge and the second convex edge are opposite to each other in a circumferential direction of the cage, and the externally threaded member is provided with a first bumper 12, the internally threaded member is provided with a second bumper 22, the first bumper of the externally threaded member is in contact with the first flange in the circumferential direction of the cage, and the first threaded member
  • the second bump block is in contact with the second convex edge in the circumferential direction of the cage.
  • first end surface of the cage and the first convex edge and the second end surface and the second convex edge are opposite structures, which are interchangeably defined or used, that is, the first convex edge may correspond to the second bumper and The second bumper touches, and the second bump may correspond to the first bumper and touch the first bumper.
  • the length of the roller retaining hole corresponds to the length of the planetary roller.
  • the corresponding meaning is that the length K of the roller retaining hole is slightly larger than the length K1 of the planetary roller, so that the roller retaining hole and the two ends of the planetary roller have a certain gap, so that the planetary roller The column is free to rotate within the roller retaining bore and does not tilt in the axial direction.
  • the length of the roller retaining hole can be set to 1.1 times the length of the planetary roller, or the length of the roller retaining hole is greater than the length of the planetary roller by 0.2 mm to 1.0 mm.
  • the end face of the cage is a spiral end face.
  • the end face of the cage is a helicoid corresponding to the helix of the external or internal thread.
  • the cage reset planetary roller screw device is disposed in a forced seal ball valve including a valve seat 41 and a valve ball, and the valve ball includes a valve ball body 43 and a valve flap.
  • the valve ball body is provided with a spiral driving wheel, and the spiral driving wheel is driven by the cage to reset the planetary roller threading device to drive the valve flap to be engaged with the valve seat.
  • the cage reset planetary roller screw device is disposed in a forced seal ball valve
  • the forced seal ball valve includes a valve ball, a first valve seat and a first drive wheel, A drive wheel drives the first valve seat to engage the valve ball through the cage reset planetary roller threading device.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • a cage reset planetary roller screw device includes an externally threaded member 10 provided with an external thread 11 and an internally threaded member 20 provided with an internal thread 21 having the same pitch of the external thread and the internal thread.
  • the externally threaded member reciprocally rotates relative to the internally threaded member, and the internally threaded member reciprocates in the axial direction.
  • the movement stroke of the internally threaded member in a direction away from the externally threaded member is a load-bearing stroke (refer to FIG. 6), that is, a thrust is applied to the internal thread when the externally threaded member rotates, causing the internally threaded member to move against the external resistance.
  • the movement stroke of the internally threaded member toward the direction of the externally threaded member is a non-loading stroke (refer to FIG. 7), that is, when the externally threaded member rotates, only the internal threaded member itself needs to be moved, and even the internal threaded member is urged toward the externally threaded member.
  • External force for direction movement The stroke in which the internally threaded member moves in the axial direction is a finite distance, not greater than the pitch of the external or internal thread, usually only about one-half of the pitch.
  • a plurality of planetary rollers 31 are disposed between the external thread and the internal thread.
  • the planetary rollers are provided with a ring groove 32 having the same pitch t and the same pitch.
  • the ring grooves of the planetary rollers respectively mesh with the external thread and the internal thread, and the planetary roller passes
  • the cage is disposed between the external thread and the internal thread, and the planetary roller is disposed in the roller holding hole 33 of the cage.
  • the length K of the roller retaining hole is slightly larger than the length K1 of the planetary roller, so that the roller retaining hole and the both ends of the planetary roller have a gap of 0.2 mm, so that the planetary roller can freely rotate in the roller retaining hole. And will not move in the axial direction. Experiments have shown that controlling the gap between the roller retaining hole and the ends of the planetary roller can make the movement of the cage more stable.
  • the two ends of the cage are a first end face 34 and a second end face 35, respectively, and the first end face and the second end face of the retainer are spiral end faces.
  • the spiral end faces of the first end face and the second end face are helix faces corresponding to the helix of the external or internal thread.
  • the spiral surface of the first end surface forms a first convex edge 36 at a position rotated one turn, and the spiral surface of the second end surface forms a second convex edge 37 at a position rotated one turn, and the width of the first convex edge and the second convex edge is equal to the external thread Or the pitch of the internal thread.
  • the first ledge and the second led are opposite in the circumferential direction of the cage.
  • the externally threaded member is provided with a first bumper block 12, and the first bumper block is a pin that protrudes from the end face of the externally threaded member.
  • the internally threaded member is provided with a second contact block 22, which is also a pin protruding from the end surface of the internally threaded member.
  • the first bumper of the externally threaded member touches the first ledge in the circumferential direction of the retainer, and the second bumper of the internally threaded member touches the second ledge in the circumferential direction of the retainer.
  • the first end surface of the cage and the first convex edge and the second end surface and the second convex edge are opposite structures, and the two end faces of the cage are exchanged, and have the same structure and use effect.
  • the internally threaded member can be moved axially to the nearest end of the externally threaded member as a working start position (as shown in FIG. 1), and the first bump 12 of the externally threaded member and the cage
  • the first ledge 36 is in contact (or in close contact) while the second bumper 22 of the internally threaded member is in contact (or in close contact) with the second ledge 37 of the retainer.
  • the planetary roller may also have a motion advance or lag during the rotation of the externally threaded member. If the movement of the planetary roller relative to the externally threaded member is delayed, as shown in Fig. 7, the first contact block 12 of the externally threaded member pushes the cage to rotate, and since the process is non-loading rotation of the planetary roller screw, the planetary roller is rolling while The gap between the external thread and the internal thread is generated, and the cage and the planetary roller return to the working start position (as shown in Fig. 1). As shown in FIG.
  • the second touch block of the internally threaded member blocks the rotation of the retainer.
  • the externally threaded part drives the cage and the planetary roller back to the working start position by a sliding fit.
  • the cage can always return to the work start position. Since the cage defines the position of the planetary rollers, the planetary rollers engaged with the internal and external threads can also accurately return to the starting position of the work.
  • the technical solution of the embodiment utilizes the characteristics of the external thread and the internal thread to carry the one-way rotational load, and pushes the cage to accurately reset the planetary roller during the non-load rotation stroke, so that the planetary roller maintains the correct relationship between the external thread and the internal thread.
  • the working position ensures the good working condition of the planetary roller screw device.
  • the structure is simple and the practical effect is good.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • a cage resetting planetary roller screw device is a structural simplification of the first embodiment.
  • the cage may be a cage with a convex edge on one side.
  • the two ends of the cage are respectively a first end surface 34 and a second end surface 35, and the first end surface of the cage is a spiral end surface.
  • the spiral end face of the first end face is a helicoid corresponding to the helix of the external or internal thread.
  • the helicoidal surface of the first end face forms a first flange 36 at a position rotated one turn, the width of the first flange being equal to the pitch of the external or internal thread.
  • the second end face 35 is a flat surface having no convex edge.
  • the externally threaded member is provided with a first bumper block 12, and the first bumper block is a pin that protrudes from the end face of the externally threaded member.
  • the first bumper of the externally threaded member touches the first ledge in the circumferential direction of the retainer.
  • the planetary roller moves during the movement to the working starting position (ie, the non-loading stroke) ) Always habitually advanced, or always habitually lags behind. If the planetary roller always lags behind the externally threaded component during the movement to the working starting position, the simplified structure of the embodiment can be adopted, the structural complexity is reduced, and the manufacturing cost and the maintenance cost are saved.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • a cage resetting planetary roller screw device this embodiment is a structural simplification of the first embodiment.
  • the cage may be a cage with a convex edge on one side.
  • the two ends of the cage are a first end surface 34 and a second end surface 35, respectively, and the first end surface of the cage is a spiral end surface.
  • the spiral end face of the first end face is a helicoid corresponding to the helix of the external or internal thread.
  • the helicoidal surface of the first end face forms a first flange 36 at a position rotated one turn, the width of the first flange being equal to the pitch of the external or internal thread.
  • the second end face 35 is a flat surface having no convex edge.
  • the internally threaded member is provided with a first contact block 22, which is a pin projecting from the end surface of the internally threaded member.
  • the first bumper of the internally threaded member touches the first ledge in the circumferential direction of the cage.
  • the planetary roller moves during the movement to the working starting position (ie, the non-loading stroke) ) Always habitually advanced, or always habitually lags behind. If the planetary roller is always ahead of the externally threaded member during the movement to the working starting position, the simplified structure of the embodiment can be employed, the structural complexity is reduced, and the manufacturing cost and the maintenance cost are saved.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • a cage reset planetary roller screw device is disposed in the forced seal ball valve.
  • the forced sealing ball valve comprises a valve seat 41, a valve ball and a valve stem 42.
  • the valve ball comprises a valve ball body 43 and a valve flap 20.
  • the valve ball body is provided with a spiral driving wheel 10, and the spiral driving wheel drives the valve flap through the spiral constraint and Take back.
  • the valve stem drives a valve stem gear 44 to rotate, and the valve stem gear drives the spiral drive wheel to rotate through the intermediate gear 45.
  • the upper part of the valve ball is provided with a valve stem gear protection cover 46 fixedly connected with the valve ball, and the valve stem gear protection cover is provided with a valve.
  • the ball rotating shaft 47 rotates around the rotating shaft, and the rotating shaft of the valve stem gear is coaxial with the rotating shaft of the valve ball.
  • the protective cover is further provided with a through hole.
  • the through hole is provided with a locking body 48.
  • the locking body is two spheres, and the valve is in the valve.
  • a first recessed hole 49 is disposed at a corresponding position on the upper surface of the rod gear, and a second recessed hole 4a is disposed at a corresponding position of the upper cover 4c of the valve body; the locking body can fill a space or fill between the through hole and the first recessed hole a space formed by the above-mentioned through hole and the second recessed hole.
  • the valve stem gear can rotate the valve ball body between the open and closed positions by the locking body.
  • the valve ball body is rotated to the closed position (as shown in FIG. 9)
  • the through hole, the first recessed hole and the second recessed hole are aligned, and the valve ball is restrained from rotating by the lower pivot limit 4b, so the lock body moves.
  • the position fills the space formed by the through hole and the second recess to lock the valve ball body in the closed position.
  • the center of the valve flap is provided with a hexagonal shaft 23, and the valve ball body is provided with a hexagonal hole corresponding to the hexagonal axis of the valve flap, and the hexagonal shaft of the valve flap is slidably engaged with the hexagonal hole of the valve ball body to make the valve flap It reciprocates linearly with respect to the valve body.
  • the valve flap When the ball valve is in the open state, the valve flap is in contact with the valve ball body, and the valve disc and the valve ball body form a common spherical surface.
  • the locking body locks the locking relationship between the valve stem gear and the valve ball body, and the valve stem starts to rotate the valve ball body and the valve disc simultaneously.
  • the valve ball body rotates to the closed position, the valve ball body stops rotating.
  • the locking body releases the locking relationship between the valve stem gear and the valve ball body, the valve stem drives the valve stem gear 44 to continue to rotate, the valve stem gear drives the spiral driving wheel to rotate, and the valve flap is pushed out and pressed against the valve seat to realize the forced sealing of the ball valve.
  • the seal is closed.
  • the valve stem gear first drives the valve disc away from the valve seat.
  • valve stem gear drives the valve ball body to rotate in the opening direction through the spiral driving wheel and the valve flap.
  • the locking body also re-locks the locking relationship between the valve stem gear and the valve ball body until the valve ball body is rotated to the open position.
  • valve flap is subjected to the pressure of the pipe medium and the pressure of the pressure seat.
  • the screw drive wheel and the valve flap need to carry the top pressure of the screw.
  • the spiral drive wheel and the flap only need to carry a small load of their own rotation.
  • the helical drive wheel drives the valve flap through a planetary roller screw.
  • the conventional planetary roller screw device requires a rail changing groove.
  • the valve flap only moves in a small stroke interval, and the rotation angle when the driving thread is operated is small.
  • the spiral driving wheel drives the valve.
  • the angle of rotation of the flap is no more than 180°, and the rail change slot is no longer a necessary structure.
  • the defect of the planetary roller screw device of such a forced sealing ball valve is that during the reciprocating rotation of the planetary roller screw device, the planetary roller can not move during the movement due to manufacturing precision and working environment.
  • the precise positional relationship between the external thread and the internal thread is ensured, that is, each time the ball body is rotated to the open position, the planetary roller cannot be restored to the same position, and the accumulated error caused by the multiple reciprocating rotations makes
  • the planetary roller and the cage produce an axial offset.
  • the retainer can press the externally threaded component or the internally threaded component to hinder the normal rotation of the externally threaded component or the internally threaded component. Even the ball valve operation is disabled.
  • the forced seal ball valve of the present embodiment adopts the cage reset planetary roller screw device of the first embodiment.
  • the spiral driving wheel 10 is an externally threaded member provided with an external thread 11 according to the first embodiment
  • the valve flap 20 is the inner thread 21 provided in the first embodiment. Threaded parts.
  • a plurality of planetary rollers 31 are disposed between the external thread and the internal thread, and the planetary roller is disposed between the external thread and the internal thread through the cage 30, and the planetary roller is disposed at the retaining The rollers of the frame are held in the holes 33.
  • the planetary roller 31 has a clearance fit with the external thread 11 and the internal thread 21, that is, when the planetary roller screw is not subjected to a load, the planetary roller can rotate or slide between the external thread and the internal thread.
  • the valve flap 20 (internal threaded member) is in contact with the valve ball body, and the screw drive wheel 10 (external threaded member) cannot continue to drive.
  • the valve flap moves toward the valve body.
  • the planetary rollers and the cage are axially centered at the internal and external threads.
  • the technical solution of the embodiment utilizes the characteristics that the external thread and the internal thread carry the one-way rotational load, and the non-load rotation stroke pushes the cage to accurately return the planetary roller to the working starting position, so that the planetary roller is externally and internally threaded. Maintain the correct working position between them to ensure the good working condition of the planetary roller screw.
  • the structure is simple and the practical effect is good.
  • the spiral drive wheel can also be designed as an internally threaded member provided with an internal thread
  • the valve flap can be designed as an externally threaded member provided with an external thread
  • Embodiment 5 is a diagrammatic representation of Embodiment 5:
  • a cage reset planetary roller screw device is disposed in the forced seal ball valve.
  • the forced sealing ball valve is a side valve stem forced sealing ball valve, comprising a valve body 50, a first valve seat 10 and a valve ball 51.
  • the first valve seat reciprocates in the direction of the valve ball and is engaged with the valve ball to achieve a forced sealing; the side valve
  • the rod forcibly sealing the ball valve is provided with a first driving wheel 20 for driving the movement of the first valve seat and a second driving wheel 52 for driving the rotation of the valve ball, the first driving wheel is coaxial with the valve seat, and the first driving wheel drives the rotation of the second driving wheel
  • the first drive wheel is driven to rotate by a side valve stem 53.
  • the side valve stem is provided with a valve stem gear 54.
  • the first drive wheel and the second drive wheel mesh, and the valve stem gear drives the first drive wheel through gear engagement.
  • the valve ball is provided with a first rotating shaft 55, and the valve ball is installed in the valve body through the first bearing seat 56; the first rotating shaft is provided with a valve ball adjusting ring 57, and the valve ball adjusting ring is disposed at the first bearing seat and the valve ball
  • the valve ball ring is fixedly connected with the valve ball; the outer diameter of the ball ball ring is provided with a protruding valve ball block 58 , and the ball ball block is provided with a dial ring through hole 59 , the dial ring through hole
  • the second driving wheel is mounted on the ball ring, and the second driving wheel is rotated and matched with the outer diameter of the ball ring, the second driving The wheel is located between the ball ball block and the valve ball; the first bearing seat is provided with a first recessed hole 5b having a circumferential position corresponding to the through hole of the dial, and the second driving wheel is provided with
  • the first driving wheel has a rotation stroke of not more than 180° in the opening or closing operation of the forced sealing ball valve.
  • the second driving wheel is provided with a dialing pin 5d.
  • the valve ball is provided with a valve ball ring groove 5e.
  • the dialing pin of the second driving wheel is embedded in the valve ball ring groove, and the valve ball is toggled to rotate in the opening direction.
  • the tail of the first valve seat is provided with a pin 5f to move the first valve seat in the valve body axially along the valve seat to avoid rotation.
  • the valve stem drives the first driving wheel to rotate, and the first driving wheel drives the valve seat to move toward the valve ball, and the first driving wheel also drives the second driving wheel to rotate.
  • the valve stem stops, the valve stem continues to rotate in the closing direction, and the second driving wheel pushes the locking ball out of the second recessed hole, and the locking ball enters the space formed by the through hole of the dial and the first recessed hole.
  • the locking relationship between the second drive wheel and the ball ring is released, and the ball is locked in the closed position. At this point the ball is aligned with the seat and there is still a gap.
  • the second driving wheel can idle on the valve ball dial, and the first driving wheel continues to drive the first valve seat to move, so that the first valve seat and the valve ball are engaged to achieve a forced sealing.
  • the valve stem drives the first driving wheel to rotate in the opening direction
  • the first driving wheel drives the valve seat to disengage from the valve ball
  • the first driving wheel also drives the second driving wheel to rotate in the opening direction.
  • the two drive wheels can be idling on the ball rim and the ball is still locked in the closed position.
  • the dial pin simultaneously pushes the valve ball to rotate in the opening direction, and the locking ball is moved from the first recessed hole. Get out of the middle.
  • the locking ball enters the dial through hole and the second recessed hole, and rotates with the valve ball dial and the second driving wheel in the opening direction. Until the ball is turned to the open position.
  • the forced seal ball valve of this embodiment employs a cage reset planetary roller screw device.
  • the first drive wheel drives the valve seat through the cage resetting the planetary roller threading device.
  • the planetary roller screw device includes an externally threaded member 10 provided with an external thread 11 and an internally threaded member 20 provided with an internal thread 21.
  • the externally threaded member in this embodiment is a valve seat 10, and the internally threaded member is the first drive wheel 20.
  • This embodiment employs the same planetary roller and cage structure as in the first embodiment.
  • a first bumper 13 is provided on the valve seat 10 (outer threaded member), and the first bumper is a pin projecting from the outer diameter of the valve seat.
  • a second bumper 24 is provided on the first drive wheel 20 (internal threaded member), and the second bumper block is a dial that protrudes from the internal thread of the end of the first drive wheel.
  • the planetary roller threading device When the ball valve is in the open state, the planetary roller threading device is in the working start position, and the valve seat 10 is disengaged from the valve ball. At this point, the planetary rollers and cage are axially centered at the internal and external threads, as shown in Figure 12.
  • the first bumper 13 of the valve seat is in contact with (or in close contact with) the first flange 36 of the cage, while the second bumper 24 of the first drive wheel is in contact with (or in close contact with) the second flange 37 of the cage. ).
  • the valve ball rotates from the open position, the ball rotates to the closed position and then stops rotating, the first driving wheel continues to rotate, and the internal thread of the first driving wheel passes the external thread of the planetary roller 31 and the valve seat. Push the seat toward the ball until it moves to the seat and the ball, as shown in Figure 14.
  • the rotation of the cage lags behind the rotation of the first drive wheel, and the second bumper is gradually separated from the second flange of the cage.
  • the planetary roller can not guarantee the purely precise rolling motion with the external thread and the internal thread during the movement of the planetary roller. It may be ahead of the theoretical motion and may also be related to The theoretical motion relationship lags behind.
  • the valve seat is driven away from the valve ball, which is a non-loading rotation.
  • the planetary rollers may also experience motion advancement or lag. If the planetary roller lags behind the first driving wheel, as shown in Fig. 15, the internal thread touching block of the first driving wheel pushes the cage back to the working starting position, and since the opening process is non-loading rotation to the planetary roller screw device, While the planetary rollers are rolling, they use the gap between the external and internal threads to produce a slip, and the cage will drive the planetary rollers back to the starting position of the work.
  • the first bump of the valve seat will block the cage at the working start position as shown in FIG.
  • the first drive wheel continues to rotate, and the internal thread of the first drive wheel pushes the planetary roller back to the starting position of the work.

Abstract

一种保持架复位行星滚柱螺纹装置，包括设有外螺纹(11)的外螺纹部件(10)和设有内螺纹(21)的内螺纹部件(20)，在所述外螺纹和内螺纹之间设有多个行星滚柱(31)，所述行星滚柱(31)通过保持架(30)设置在所述外螺纹和内螺纹之间，所述行星滚柱(31)设置在所述保持架(30)的滚柱保持孔(33)中；所述保持架(30)的端面设有凸沿(36,37)，所述外螺纹部件(10)和/或内螺纹部件(20)设有螺纹碰块(12,22)，所述螺纹碰块在保持架(30)的圆周方向与保持架(30)的所述凸沿触碰。其利用外螺纹和内螺纹承载单向转动载荷的特性，在非载荷转动行程时推动保持架将行星滚柱准确复位，使行星滚柱在外螺纹和内螺纹之间保持正确的工作起始位置，保证行星滚柱螺旋装置的良好工作状态。

Description

保持架复位行星滚柱螺纹装置
相关申请的交叉引用
本申请主张在2018年5月3日在中国提交的中国专利申请No.201810412883.5的优先权，其全部内容通过引用包含于此。
技术领域
本公开属于螺旋驱动装置，尤其涉及一种保持架复位行星滚柱螺纹装置。
背景技术
在流体控制领域，如油气生产流程切换、管道关断、计量、调压、分子筛切换、压缩机进出口、炼油工艺中的氢气工况，合成氨装置的空分等操作频繁并对流体开关控制和关闭严密性要求苛刻的领域，要求阀门能够在直通的状态下尽可能小的产生压降，并且能够提供不受管线介质压力影响的强制扭矩密封。强制密封球阀被公认为理想的解决方案。相关技术中的一种采用螺旋驱动的强制密封球阀，采用螺旋顶压方式实现阀球与阀体之间的强制密封。但应用在大口径高压管道时，阀球需承受很高的压力，在螺纹的接触面会产生巨大的摩擦力，导致阀门启闭操作扭矩增大，造成操作困难，并会严重降低螺纹工作寿命。采用行星滚柱螺旋装置是解决这一技术问题的途径，通常的行星滚柱螺旋装置需要换轨槽，对于强制密封球阀而言，其驱动螺纹工作时的旋转角度很小，通常不大于360°，换轨槽已不再是必要的结构。但行星滚柱螺旋装置在往复旋转的过程中，由于制造精度和工作环境等因素，行星滚柱运动过程中不能保证与外螺纹和内螺纹之间精确的位置关系，在多次的往复转动后产生的积累误差使行星滚柱和保持架产生轴向偏移，这种轴向偏移积累到一定程度时，会使保持架顶压外螺纹部件或内螺纹部件，阻碍外螺纹部件或内螺纹部件的正常转动，使操作失效。
另一种阀座移动式强制密封球阀，阀座的移动由带有内螺纹的阀座驱动轮通过行星滚柱驱动带有外螺纹的阀座往复移动实现与固定阀球的强制密封。其行星滚柱传动的原理与上一种阀瓣移动与阀座抱合的结构基本相同，也存 在行星滚柱螺旋装置在往复旋转的过程中，由于制造精度和工作环境等因素，行星滚柱运动过程中不能保证与外螺纹和内螺纹之间精确的位置关系，在多次的往复转动后产生的积累误差使行星滚柱和保持架产生轴向偏移，这种轴向偏移积累到一定程度时，会使保持架顶压外螺纹部件或内螺纹部件，阻碍外螺纹部件或内螺纹部件的正常转动，使操作失效。
发明内容
本公开的目的是提出一种保持架复位行星滚柱螺纹装置的技术方案，使行星滚柱在外螺纹和内螺纹之间保持正确的工作位置。
为了实现上述目的，本公开的技术方案是：一种保持架复位行星滚柱螺纹装置，包括设有外螺纹的外螺纹部件和设有内螺纹的内螺纹部件，所述外螺纹和内螺纹的螺距相同，在所述外螺纹和内螺纹之间设有多个行星滚柱，所述行星滚柱设有间距与所述螺距相同的环槽，所述行星滚柱的环槽分别与所述外螺纹和内螺纹啮合，所述行星滚柱通过保持架设置在所述外螺纹和内螺纹之间，所述行星滚柱设置在所述保持架的滚柱保持孔中；所述保持架的端面设有凸沿，所述外螺纹部件和/或所述内螺纹部件设有螺纹碰块，所述螺纹碰块在所述保持架的圆周方向与保持架的所述凸沿触碰。
更进一步，保持架可以是单面设有凸沿的保持架，所述保持架的一个端面为第一端面，所述第一端面设有第一凸沿，所述螺纹碰块是设置在所述外螺纹部件或所述内螺纹部件的第一碰块，所述第一碰块在所述保持架的圆周方向与保持架的所述第一凸沿触碰。
更进一步，保持架可以是双面设有凸沿的保持架，所述保持架的两端面分别为第一端面和第二端面，所述第一端面设有第一凸沿，所述第二端面设有第二凸沿，所述第一凸沿和第二凸沿在所述保持架的圆周方向朝向相反，所述外螺纹部件设有第一碰块，所述内螺纹部件设有第二碰块，所述外螺纹部件的第一碰块在所述保持架的圆周方向与所述第一凸沿触碰，所述内螺纹部件的第二碰块在所述保持架的圆周方向与所述第二凸沿触碰。
更进一步，所述滚柱保持孔的长度对应于所述行星滚柱的长度。
更进一步，所述保持架的端面是螺旋端面。
更进一步，所述保持架的端面是与所述外螺纹或内螺纹的螺旋线对应的螺旋面。
更进一步，所述保持架复位行星滚柱螺纹装置设置在强制密封球阀中，所述强制密封球阀包括阀座和阀球，阀球包括阀球本体和阀瓣，阀球本体上设有螺旋驱动轮，所述螺旋驱动轮通过所述保持架复位行星滚柱螺纹装置驱动阀瓣与阀座抱合。
更进一步，所述保持架复位行星滚柱螺纹装置设置在强制密封球阀中，所述强制密封球阀包括阀球、第一阀座和第一驱动轮，所述第一驱动轮通过所述保持架复位行星滚柱螺纹装置驱动所述第一阀座与阀球抱合。
本公开的有益效果是：利用外螺纹和内螺纹承载单向转动载荷的特性，在非载荷转动行程时推动保持架将行星滚柱准确复位，使行星滚柱在外螺纹和内螺纹之间保持正确的工作起始位置，保证行星滚柱螺旋装置的良好工作状态。结构简单、实用效果良好。
下面结合附图和实施例对本公开作一详细描述。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对本公开实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
在强制密封球阀中，
图1是本公开的结构图；
图2是本公开的结构分解图；
图3是本公开保持架和行星滚柱的结构图；
图4是本公开保持架单面设有凸沿的结构分解图，内螺纹部件设有第一碰块；
图5是本公开保持架单面设有凸沿的结构分解图，外螺纹部件设有第一碰块；
图6是本公开操作示意图，外螺纹部件转动、推动内螺纹部件进行承载 行程；
图7是本公开操作示意图，外螺纹部件的第一碰块推动保持架向工作起始位置转动；
图8是本公开操作示意图，内螺纹部件的第二碰块将保持架阻挡在工作起始位置；
图9是本公开在一种强制密封球阀中的结构图；
图10是图9所示的强制密封球阀中的阀球驱动机构的结构图；
图11是本公开在一种侧阀杆强制密封球阀中的结构图；
图12是图11所示的侧阀杆强制密封球阀中阀球和阀座机构的结构图；
图13是图11所示的侧阀杆强制密封球阀中的行星滚柱螺纹装置结构分解图；
图14是图11所示的侧阀杆强制密封球阀的操作示意图，第一驱动轮和保持架转动到关闭位置；
图15是本公开在一种侧阀杆强制密封球阀中的操作示意图，第一驱动轮的第二碰块推动保持架回到工作起始位置；
图16是本公开在一种侧阀杆强制密封球阀中的操作示意图，阀座的第一碰块将保持架阻止在工作起始位置。
具体实施方式
如图1至图3，一种保持架复位行星滚柱螺纹装置，包括设有外螺纹11的外螺纹部件10和设有内螺纹21的内螺纹部件20，所述外螺纹和内螺纹的螺距相同，在所述外螺纹和内螺纹之间设有多个行星滚柱31，所述行星滚柱设有间距t与所述螺距相同的环槽32，所述行星滚柱的环槽分别与所述外螺纹和内螺纹啮合，所述行星滚柱通过保持架设置在所述外螺纹和内螺纹之间，所述行星滚柱设置在所述保持架的滚柱保持孔33中。所述保持架的端面设有凸沿(图中36或37)，所述外螺纹部件和/或所述内螺纹部件设有螺纹碰块(图中12或22)，所述螺纹碰块在所述保持架的圆周方向与保持架的所述凸沿触碰。
保持架可以是单面设有凸沿的保持架，如图4、图5，所述保持架的一个 端面为第一端面34，所述第一端面设有第一凸沿36，所述螺纹碰块是设置在所述外螺纹部件或所述内螺纹部件的第一碰块(图4中的12或图5中的22)，所述第一碰块在所述保持架的圆周方向与保持架的所述第一凸沿触碰。
保持架也可以是双面设有凸沿的保持架，如图1至图3，所述保持架的两端面分别为第一端面34和第二端面35，所述第一端面设有第一凸沿36，所述第二端面设有第二凸沿37，所述第一凸沿和第二凸沿在所述保持架的圆周方向朝向相反，所述外螺纹部件设有第一碰块12，所述内螺纹部件设有第二碰块22，所述外螺纹部件的第一碰块在所述保持架的圆周方向与所述第一凸沿触碰，所述内螺纹部件的第二碰块在所述保持架的圆周方向与所述第二凸沿触碰。实际上，保持架的第一端面和第一凸沿与第二端面和第二凸沿是相对的结构，可互换定义或安装使用，即第一凸沿可以对应于第二碰块并与第二碰块触碰，第二凸沿可以对应于第一碰块并与第一碰块触碰。
所述滚柱保持孔的长度对应于所述行星滚柱的长度。所述的对应于的含义是，所述滚柱保持孔的长度K略大于所述行星滚柱的长度K1，使滚柱保持孔与行星滚柱的两端留有一定的间隙，使行星滚柱能够在滚柱保持孔内自由转动、且不会沿轴向窜动。根据经验，所述滚柱保持孔的长度可设置为行星滚柱的长度1.1倍、或所述滚柱保持孔的长度大于行星滚柱的长度0.2mm～1.0mm。
所述保持架的端面是螺旋端面。
更具体的方案是，所述保持架的端面是与所述外螺纹或内螺纹的螺旋线对应的螺旋面。
如图9，作为一种应用方式，所述保持架复位行星滚柱螺纹装置设置在强制密封球阀中，所述强制密封球阀包括阀座41和阀球，阀球包括阀球本体43和阀瓣，阀球本体上设有螺旋驱动轮，所述螺旋驱动轮通过所述保持架复位行星滚柱螺纹装置驱动阀瓣与阀座抱合。
如图11，作为又一种应用方式，所述保持架复位行星滚柱螺纹装置设置在强制密封球阀中，所述强制密封球阀包括阀球、第一阀座和第一驱动轮，所述第一驱动轮通过所述保持架复位行星滚柱螺纹装置驱动所述第一阀座与阀球抱合。
实施例一：
如图1至图3，一种保持架复位行星滚柱螺纹装置，包括设有外螺纹11的外螺纹部件10和设有内螺纹21的内螺纹部件20，外螺纹和内螺纹的螺距相同。本实施例中，外螺纹部件相对于内螺纹部件往复旋转，内螺纹部件沿轴向往复移动。内螺纹部件向离开外螺纹部件的方向的运动行程是承载行程(参考图6)，即外螺纹部件旋转时对内螺纹施加推力，使内螺纹部件克服外部阻力移动。内螺纹部件向接近外螺纹部件的方向的运动行程是非承载行程(参考图7)，即外螺纹部件旋转时仅需带动内螺纹部件自身移动，甚至还存在推动内螺纹部件向接近外螺纹部件的方向运动的外部力。内螺纹部件沿轴向移动的行程是有限的距离，不大于所述外螺纹或内螺纹的螺距，通常仅为所述螺距的二分之一左右。
在外螺纹和内螺纹之间设有多个行星滚柱31，行星滚柱设有间距t与螺距相同的环槽32，行星滚柱的环槽分别与外螺纹和内螺纹啮合，行星滚柱通过保持架设置在外螺纹和内螺纹之间，行星滚柱设置在保持架的滚柱保持孔33中。滚柱保持孔的长度K略大于所述行星滚柱的长度K1，使滚柱保持孔与行星滚柱的两端留有0.2mm的间隙，使行星滚柱能够在滚柱保持孔内自由转动、且不会沿轴向窜动。实验证明，控制滚柱保持孔与行星滚柱两端的间隙可以使保持架的运动更为平稳。
保持架的两端分别为第一端面34和第二端面35，保持架的第一端面和第二端面是螺旋端面。第一端面和第二端面的螺旋端面是与外螺纹或内螺纹的螺旋线对应的螺旋面。第一端面的螺旋面在旋转一周的位置形成第一凸沿36，第二端面的螺旋面在旋转一周的位置形成第二凸沿37，第一凸沿和第二凸沿的宽度等于外螺纹或内螺纹的螺距。第一凸沿和第二凸沿在保持架的圆周方向朝向相反。
外螺纹部件设有第一碰块12，第一碰块是从外螺纹部件端面凸出的一个销轴。所述内螺纹部件设有第二碰块22，第二碰块也是从内螺纹部件端面凸出的一个销轴。外螺纹部件的第一碰块在保持架的圆周方向与所述第一凸沿触碰，内螺纹部件的第二碰块在所述保持架的圆周方向与所述第二凸沿触碰。实际上，保持架的第一端面和第一凸沿与第二端面和第二凸沿是相对的结构， 将保持架的两端面调换，也具有完全相同的结构和使用效果。
本实施例中，可以将内螺纹部件沿轴向移动到距外螺纹部件的最近端视为工作起始位置(如图1所示的位置)，外螺纹部件的第一碰块12与保持架的第一凸沿36接触(或接近接触)，同时，内螺纹部件的第二碰块22与保持架的第二凸沿37接触(或接近接触)。
当外螺纹部件转动、推动内螺纹部件进行所述承载行程时，如图6所示，外螺纹和内螺纹通过行星滚柱传动，减少了螺纹传动的摩擦阻力，可使外螺纹部件驱动内螺纹部件克服外部阻力而顺畅移动。在此过程中，由于行星滚柱在外螺纹和内螺纹间滚动，保持架的转动相对于外螺纹部件的转动滞后，第一碰块与保持架的第一凸沿逐渐分离。由于制造精度和工作环境等因素，行星滚柱在运动过程中不能保证完全精确地与外螺纹和内螺纹保持理论上的纯滚动运动，可能与理论的运动关系超前，也可能与理论的运动关系滞后。
当外螺纹部件转动、带动内螺纹部件进行所述非承载行程时，如图7所示，同样，外螺纹部件在转动过程中，行星滚柱也可能出现运动超前或滞后。若行星滚柱相对外螺纹部件运动滞后，如图7，外螺纹部件的第一碰块12会推动保持架转动，由于此过程对行星滚柱螺旋装置是非承载转动，行星滚柱在滚动的同时会利用与外螺纹和内螺纹之间的间隙产生滑动，保持架和行星滚柱会回到工作起始位置(如图1所示的位置)。如图8所述，若行星滚柱相对外螺纹部件运动超前，当保持架先于外螺纹部件在圆周方向回到工作起始位置，内螺纹部件的第二触碰块会阻挡保持架转动，外螺纹部件通过滑动配合带动保持架和行星滚柱回到工作起始位置。由此，当完成一个工作循环后，保持架总能回归到工作起始位置。由于保持架限定了行星滚柱的位置，与内螺纹和外螺纹啮合的行星滚柱也能准确的回归到工作起始位置。
本实施例的技术方案利用外螺纹和内螺纹承载单向转动载荷的特性，在非载荷转动行程时推动保持架将行星滚柱准确复位，使行星滚柱在外螺纹和内螺纹之间保持正确的工作位置，保证行星滚柱螺旋装置的良好工作状态。结构简单、实用效果良好。
实施例二：
一种保持架复位行星滚柱螺纹装置，本实施例是实施例一的一种结构简 化。保持架可以是单面设有凸沿的保持架。
如图4，保持架的两端分别为第一端面34和第二端面35，保持架的第一端面是螺旋端面。第一端面的螺旋端面是与外螺纹或内螺纹的螺旋线对应的螺旋面。第一端面的螺旋面在旋转一周的位置形成第一凸沿36，第一凸沿的宽度等于外螺纹或内螺纹的螺距。第二端面35是不具有凸沿的平面。
外螺纹部件设有第一碰块12，第一碰块是从外螺纹部件端面凸出的一个销轴。外螺纹部件的第一碰块在保持架的圆周方向与所述第一凸沿触碰。
根据实际工程经验，在外螺纹部件通过行星滚柱驱动内螺纹部件运动的过程中，对于某一具体的装置和应用环境而言，行星滚柱在向工作起始位置运动过程中(即非承载行程)总是习惯性地超前、或总是习惯性地滞后。若行星滚柱在向工作起始位置运动过程中总是滞后于外螺纹部件，则可采用本实施例的简化结构，降低结构复杂性，节省制造成本和维护成本。
实施例三：
一种保持架复位行星滚柱螺纹装置，本实施例是实施例一的一种结构简化。保持架可以是单面设有凸沿的保持架。
如图5，保持架的两端分别为第一端面34和第二端面35，保持架的第一端面是螺旋端面。第一端面的螺旋端面是与外螺纹或内螺纹的螺旋线对应的螺旋面。第一端面的螺旋面在旋转一周的位置形成第一凸沿36，第一凸沿的宽度等于外螺纹或内螺纹的螺距。第二端面35是不具有凸沿的平面。
内螺纹部件设有第一碰块22，第一碰块是从内螺纹部件端面凸出的一个销轴。内螺纹部件的第一碰块在保持架的圆周方向与所述第一凸沿触碰。
根据实际工程经验，在外螺纹部件通过行星滚柱驱动内螺纹部件运动的过程中，对于某一具体的装置和应用环境而言，行星滚柱在向工作起始位置运动过程中(即非承载行程)总是习惯性地超前、或总是习惯性地滞后。若行星滚柱在向工作起始位置运动过程中总是超前于外螺纹部件，则可采用本实施例的简化结构，降低结构复杂性，节省制造成本和维护成本。
实施例四：
如图9、图10，一种保持架复位行星滚柱螺纹装置，设置在强制密封球阀中。强制密封球阀包括阀座41、阀球和阀杆42，阀球包括阀球本体43和 阀瓣20，阀球本体上设有螺旋驱动轮10，螺旋驱动轮通过螺旋约束驱动阀瓣顶起和收回。阀杆带动一只阀杆齿轮44转动，阀杆齿轮通过中间齿轮45带动螺旋驱动轮转动，阀球上部设有与阀球固定连接的阀杆齿轮保护盖46，阀杆齿轮保护盖设有阀球转轴47，阀球绕该转轴转动，阀杆齿轮的转轴与阀球转轴同轴，保护盖上还设有通孔，通孔内设有锁定体48，锁定体是两个球体，在阀杆齿轮上表面对应位置设有第一凹孔49，在阀体上盖4c对应位置设有第二凹孔4a；锁定体可以充盈在上述通孔和第一凹孔间所组成的空间或充盈在上述通孔和第二凹孔所组成的空间。当锁定体充盈在上述通孔和第一凹孔组成的空间时(如图10所示位置)，阀杆齿轮可以通过锁定体带动阀球本体在开启和关闭位置之间转动。当阀球本体旋转到关闭位置时，(如图9所示)，上述通孔、第一凹孔和第二凹孔对齐，阀球受下枢轴限位4b约束停止转动，因此锁定体移动位置充盈于上述通孔和第二凹孔组成的空间，从而将阀球本体锁定在关闭位置。阀瓣的中心设有一个六棱轴23，阀球本体设有与阀瓣的六棱轴对应的六棱孔，阀瓣的六棱轴与阀球本体的六棱孔滑动配合，使阀瓣在相对于阀球本体做直线往复移动。球阀在开启状态时，阀瓣与阀球本体接触，阀瓣与阀球本体形成一个共同的球面。
在球阀的关闭过程中，锁定体锁定阀杆齿轮与阀球本体的锁定关系，阀杆开始带动阀球本体和阀瓣同时转动，当阀球本体转动到关闭位置时，阀球本体停止转动，锁定体解除阀杆齿轮与阀球本体的锁定关系，阀杆带动阀杆齿轮44继续转动，阀杆齿轮带动螺旋驱动轮转动，阀瓣被顶出并顶压在阀座上实现强制密封球阀的密封关闭。在球阀的开启过程中，阀杆齿轮首先带动阀瓣脱离阀座，当阀瓣回收到与阀球本体接触的位置时，阀杆齿轮通过螺旋驱动轮和阀瓣带动阀球本体向开启方向转动，此时锁定体也重新锁定阀杆齿轮与阀球本体的锁定关系，直至阀球本体转动到开启位置。
在关闭操作过程中，阀瓣需要承受管道介质的压力和顶压阀座的压力，螺旋驱动轮和阀瓣需要承载螺旋的顶压载荷。而在开启操作过程中，螺旋驱动轮和阀瓣仅需要承载自身转动的微小载荷。
为了降低阀门操作时阀杆的操作扭矩，螺旋驱动轮通过行星滚柱螺旋装置驱动阀瓣。通常的行星滚柱螺旋装置需要换轨槽，对于强制密封球阀而言， 阀瓣只是在较小的行程区间移动，其驱动螺纹工作时的旋转角度很小，本实施例中螺旋驱动轮驱动阀瓣的转动角度不大于180°，换轨槽已不再是必要的结构。
根据应用和实验发现，这样的强制密封球阀的行星滚柱螺旋装置存在的缺陷是，行星滚柱螺旋装置在往复旋转的过程中，由于制造精度和工作环境等因素，行星滚柱运动过程中不能保证与外螺纹和内螺纹之间精确的位置关系，即每次在阀球本体转动到开启位置时，行星滚柱不能保证复位到相同的位置，在多次的往复转动后产生的积累误差使行星滚柱和保持架产生轴向偏移，这种轴向偏移积累到一定程度时，会使保持架顶压外螺纹部件或内螺纹部件，阻碍外螺纹部件或内螺纹部件的正常转动，甚至使球阀操作失效。
为了解决这一技术问题，本实施例的强制密封球阀采用了实施例一所述的保持架复位行星滚柱螺纹装置。
如图1至图3，本实施例中，螺旋驱动轮10是实施例一所述的设有外螺纹11的外螺纹部件，阀瓣20是实施例一所述的设有内螺纹21的内螺纹部件。如实施例一所述，在外螺纹和内螺纹之间设有多个行星滚柱31，行星滚柱通过保持架30设置在所述外螺纹和内螺纹之间，行星滚柱设置在所述保持架的滚柱保持孔33中。
行星滚柱31与外螺纹11和内螺纹21之间为间隙配合，即当行星滚柱螺旋装置不承受载荷时，行星滚柱可在外螺纹与内螺纹之间产生转动或滑动。
本实施例中，球阀在开启状态时，行星滚柱螺纹装置处于所述工作起始位置，阀瓣20(内螺纹部件)与阀球本体接触，螺旋驱动轮10(外螺纹部件)不能继续驱动阀瓣向阀球本体方向移动。此时，行星滚柱及保持架在轴向处于内螺纹和外螺纹的居中位置。
螺旋驱动轮10(外螺纹部件)驱动阀瓣顶压阀座的行程中，阀瓣(内螺纹部件)向离开螺旋驱动轮(外螺纹部件)的方向的运动，是承载行程。
螺旋驱动轮带动阀瓣向阀球本体收缩的行程中，阀瓣(内螺纹部件)向接近螺旋驱动轮(外螺纹部件)的方向的运动，是非承载行程。螺旋驱动轮旋转时仅需带动阀瓣自身移动。
本实施例的技术方案利用外螺纹和内螺纹承载单向转动载荷的特性，在 非载荷转动行程时推动保持架将行星滚柱准确回复到工作起始位置，使行星滚柱在外螺纹和内螺纹之间保持正确的工作位置，保证行星滚柱螺旋装置的良好工作状态。其结构简单、实用效果良好。
同样，根据本实施例的结构原理，也可将螺旋驱动轮设计为设有内螺纹的内螺纹部件，将阀瓣设计为设有外螺纹的外螺纹部件。
实施例五：
如图11至图16，一种保持架复位行星滚柱螺纹装置，设置在强制密封球阀中。强制密封球阀是一种侧阀杆强制密封球阀，包括阀体50、第一阀座10和阀球51，第一阀座向阀球方向往复移动、并与阀球抱合实现强制密封；侧阀杆强制密封球阀设有驱动第一阀座移动的第一驱动轮20和驱动阀球转动的第二驱动轮52，第一驱动轮与阀座同轴，第一驱动轮驱动第二驱动轮转动，第一驱动轮由一只侧阀杆53驱动旋转。
侧阀杆设有阀杆齿轮54，第一驱动轮和第二驱动轮啮合，阀杆齿轮通过齿轮啮合驱动第一驱动轮。
阀球设有第一转轴55，阀球通过第一轴承座56安装在阀体内；第一转轴上设有阀球拨环57，阀球拨环设置在所述第一轴承座和阀球之间，阀球拨环与阀球固定连接；阀球拨环外径设有一个凸出的阀球拨块58，阀球拨块上设有一个拨环通孔59，所述拨环通孔中设有一个锁定球5a，阀球拨块的厚度小于锁定球的直径；第二驱动轮安装在阀球拨环上，第二驱动轮与阀球拨环的外径转动配合，第二驱动轮位于阀球拨块和阀球之间；第一轴承座设有一个圆周位置对应于拨环通孔的第一凹孔5b，第二驱动轮设有一个圆周位置对应于拨环通孔的第二凹孔5c；当阀球位于关闭位置时，锁定球位于拨环通孔和第一凹孔中，将阀球锁定在关闭位置；阀球脱离关闭位置时，锁定球位于拨环通孔和第二凹孔中，锁定第二驱动轮和阀球拨环的连接关系，使第二驱动轮带动阀球拨环转动。
本实施例中，第一驱动轮在强制密封球阀的开启或关闭操作中的转动行程不大于180°。
第二驱动轮设有拨销5d，阀球设有阀球环槽5e，第二驱动轮的拨销嵌入所述阀球环槽、并拨动所述阀球向开启方向转动。
第一阀座的尾部设有销轴5f，使第一阀座沿阀座轴向在阀体内移动，避免产生转动。
当侧阀杆强制密封球阀在开启状态时，阀球处在开启位置，锁定球位于拨环通孔和第二凹孔中，从而锁定了第二驱动轮和阀球拨环的连接关系。在进行关闭操作过程中，阀杆带动第一驱动轮转动，第一驱动轮驱动阀座向阀球方向移动，同时第一驱动轮还带动第二驱动轮转动。当阀球转动到关闭位置时停止转动，阀杆继续向关闭方向转动，第二驱动轮推动锁定球从第二凹孔中脱出，锁定球进入拨环通孔和第一凹孔构成的空间中，解除第二驱动轮和阀球拨环的锁定关系，并将阀球锁定在关闭位置。此时阀球与阀座对齐并仍留有间隙。第二驱动轮可以在阀球拨环上空转，第一驱动轮继续驱动第一阀座移动，使第一阀座与阀球抱合，实现强制密封。在进行开启操作过程中，阀杆带动第一驱动轮向开启方向转动，第一驱动轮驱动阀座脱离阀球，同时第一驱动轮还带动第二驱动轮向开启方向转动，此时由于第二驱动轮可以在阀球拨环上空转，阀球仍锁定在关闭位置。第一阀座脱离与阀球的抱合后，当第二凹孔旋转到与拨环通孔及第一凹孔对齐时，拨销同时推动阀球向开启方向转动，锁定球从第一凹孔中脱出。锁定球进入拨环通孔和第二凹孔中，随阀球拨环和第二驱动轮向开启方向转动。直至阀球转动到开启位置。
本实施例的强制密封球阀采用了保持架复位行星滚柱螺纹装置。
第一驱动轮通过保持架复位行星滚柱螺纹装置驱动阀座。行星滚柱螺旋装置包括设有外螺纹11的外螺纹部件10和设有内螺纹21的内螺纹部件20。本实施例中的外螺纹部件是阀座10，内螺纹部件是第一驱动轮20。本实施例采用了与实施例一相同的行星滚柱及保持架结构。
在阀座10(外螺纹部件)设有第一碰块13，第一碰块是从阀座外径凸出的一个销轴。在第一驱动轮20(内螺纹部件)设有第二碰块24，第二碰块是从第一驱动轮端部的内螺纹凸出的一个拨块。
球阀在开启状态时，行星滚柱螺纹装置处于所述工作起始位置，阀座10与阀球脱离。此时，行星滚柱及保持架在轴向处于内螺纹和外螺纹的居中位置，如图12。阀座的第一碰块13与保持架的第一凸沿36接触(或接近接触)，同时，第一驱动轮的第二碰块24与保持架的第二凸沿37接触(或接近接触)。 强制密封球阀的关闭过程中，阀球从开启位置转动，阀球转动到关闭位置后停止转动，第一驱动轮继续转动，第一驱动轮的内螺纹通过行星滚柱31和阀座的外螺纹推动阀座向阀球方向移动，直至移动到阀座与阀球抱合，如图14所示。由于行星滚柱在外螺纹和内螺纹间滚动，保持架的转动相对于第一驱动轮的转动滞后，第二碰块与保持架的第二凸沿逐渐分离。在此过程中，由于制造精度和工作环境等因素，行星滚柱运动过程中不能保证完全精确地与外螺纹和内螺纹保持理论上的纯滚动运动，可能与理论的运动关系超前，也可能与理论的运动关系滞后。
强制密封球阀在开启过程中，此过程第一驱动轮转动时驱动阀座脱离阀球，是非承载的转动。同样，第一驱动轮在转动过程中，行星滚柱也可能出现运动超前或滞后。若行星滚柱相对第一驱动轮运动滞后，如图15，第一驱动轮的内螺纹触碰块会推动保持架回到工作起始位置，由于开启过程对行星滚柱螺旋装置是非承载转动，行星滚柱在滚动的同时会利用与外螺纹和内螺纹之间的间隙产生滑动，保持架会带动行星滚柱会回到工作起始位置。若行星滚柱相对第一驱动轮运动超前，阀座的第一碰块会将保持架阻挡在工作起始位置如图16所示。第一驱动轮继续转动，第一驱动轮的内螺纹推动行星滚柱回到工作起始位置。

Claims (8)

  1. 一种保持架复位行星滚柱螺纹装置，包括设有外螺纹的外螺纹部件和设有内螺纹的内螺纹部件，所述外螺纹和内螺纹的螺距相同，在所述外螺纹和内螺纹之间设有多个行星滚柱，所述行星滚柱设有间距与所述螺距相同的环槽，所述行星滚柱的环槽分别与所述外螺纹和内螺纹啮合，所述行星滚柱通过保持架设置在所述外螺纹和内螺纹之间，所述行星滚柱设置在所述保持架的滚柱保持孔中；其中，所述保持架的端面设有凸沿，所述外螺纹部件和/或所述内螺纹部件设有螺纹碰块，所述螺纹碰块在所述保持架的圆周方向与保持架的所述凸沿触碰。
  2. 根据权利要求1所述的一种保持架复位行星滚柱螺纹装置，其中，所述保持架的一个端面为第一端面，所述第一端面设有第一凸沿，所述螺纹碰块是设置在所述外螺纹部件或所述内螺纹部件的第一碰块，所述第一碰块在所述保持架的圆周方向与保持架的所述第一凸沿触碰。
  3. 根据权利要求1所述的一种保持架复位行星滚柱螺纹装置，其中，所述保持架的两端面分别为第一端面和第二端面，所述第一端面设有第一凸沿，所述第二端面设有第二凸沿，所述第一凸沿和第二凸沿在所述保持架的圆周方向朝向相反，所述外螺纹部件设有第一碰块，所述内螺纹部件设有第二碰块，所述外螺纹部件的第一碰块在所述保持架的圆周方向与所述第一凸沿触碰，所述内螺纹部件的第二碰块在所述保持架的圆周方向与所述第二凸沿触碰。
  4. 根据权利要求1所述的一种保持架复位行星滚柱螺纹装置，其中，所述滚柱保持孔的长度对应于所述行星滚柱的长度。
  5. 根据权利要求1所述的一种保持架复位行星滚柱螺纹装置，其中，所述保持架的端面是螺旋端面。
  6. 根据权利要求5所述的一种保持架复位行星滚柱螺纹装置，其中，所述保持架的端面是与所述外螺纹或内螺纹的螺旋线对应的螺旋面。
  7. 根据权利要求1所述的一种保持架复位行星滚柱螺纹装置，其中，所述保持架复位行星滚柱螺纹装置设置在强制密封球阀中，所述强制密封球阀 包括阀座和阀球，阀球包括阀球本体和阀瓣，阀球本体上设有螺旋驱动轮，所述螺旋驱动轮通过所述保持架复位行星滚柱螺纹装置驱动阀瓣与阀座抱合。
  8. 根据权利要求1所述的一种保持架复位行星滚柱螺纹装置，其中，所述保持架复位行星滚柱螺纹装置设置在强制密封球阀中，所述强制密封球阀包括阀球、第一阀座和第一驱动轮，所述第一驱动轮通过所述保持架复位行星滚柱螺纹装置驱动所述第一阀座与阀球抱合。
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