CN114877118A - Adjustable clearance type double-nut ball screw electric cylinder assembly and adjusting valve - Google Patents

Adjustable clearance type double-nut ball screw electric cylinder assembly and adjusting valve Download PDF

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Publication number
CN114877118A
CN114877118A CN202210754141.7A CN202210754141A CN114877118A CN 114877118 A CN114877118 A CN 114877118A CN 202210754141 A CN202210754141 A CN 202210754141A CN 114877118 A CN114877118 A CN 114877118A
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CN
China
Prior art keywords
valve
valve core
valve body
screw nut
piston
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Granted
Application number
CN202210754141.7A
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Chinese (zh)
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CN114877118B (en
Inventor
毛秉
赵志强
竺吉珍
毛斌辉
汪济舟
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Ningbo Sono Manufacturing Co ltd
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Ningbo Sono Manufacturing Co ltd
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Priority to CN202210754141.7A priority Critical patent/CN114877118B/en
Publication of CN114877118A publication Critical patent/CN114877118A/en
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Publication of CN114877118B publication Critical patent/CN114877118B/en
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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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return 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
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
    • 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
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
    • F16H25/2418—Screw seals, wipers, scrapers or the like
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift 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
    • 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
    • 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
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
    • 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
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member
    • 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
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

The invention belongs to the technical field of valves, and particularly relates to an adjustable gap type double-nut ball screw electric cylinder assembly and an adjusting valve, wherein the electric cylinder assembly comprises a hollow piston rod, a screw nut A, a ball screw, a piston, an anti-rotation key, a gap adjusting gasket, a screw nut B and a ball reverser; a gap adjusting gasket is arranged between one end of the piston and a flange of the screw nut B, and the thickness of the gap adjusting gasket is adjustable; in the regulating valve, one end of the valve core is provided with a plurality of valve core convex parts and valve core concave parts, and the inner wall of the regulating cavity is provided with a plurality of valve body convex parts and valve body concave parts. The piston is provided with the double anti-rotation device, the two sides of the piston are provided with the double lead screw nuts, and the gap adjusting gasket is arranged between the nuts and the piston, so that the positioning precision of the electric cylinder assembly is improved; an isolation sleeve is sleeved on the periphery of the valve core, so that the valve core is prevented from being damaged due to direct impact of fluid on the valve core; the fluid channel of the adjusting cavity between the valve core and the valve body has multiple adjusting states, so that the adjusting precision is improved, the buffering and the diversion can be effectively realized, and the fluid noise is reduced.

Description

Adjustable clearance type double-nut ball screw electric cylinder assembly and adjusting valve
Technical Field
The invention relates to the technical field of valves, in particular to an adjustable gap type double-nut ball screw electric cylinder assembly and an adjusting valve.
Background
With the continuous development of the present industrial automatic transmission technology, the precision requirement for the transmission structure is higher and higher. At present, the electric cylinder is widely applied to the field of mechanical automatic manufacturing, the ball screw is generally adopted to transmit power, the ball screw and the screw nut roll relatively, the screw nut is fixed, and the piston rod is driven to be converted into linear motion. However, the electric cylinder in the prior art has poor working stability, large noise, poor operation precision and short service life.
In the regulating valve, an actuating mechanism is adopted to move a valve core and regulate the opening degree of the valve, so that the flow and the pressure of a fluid channel passing through the valve are regulated, however, the regulation precision of the existing regulating valve for high-pressure fluid is generally poor, for high-pressure high-speed fluid, a valve cage or a sleeve is usually adopted to carry out multistage pressure reduction and speed reduction, and then the flow is regulated, the valve structure is complex, the pressure reduction noise of the valve cage or the sleeve is large, parts are easy to damage, and the valve cost is high; if the valve cage or the sleeve is not adopted for speed reduction, the high-pressure high-level fluid can generate strong impact force on the valve core, and the valve core is eroded to damage the valve core.
Disclosure of Invention
The invention aims to solve the problems of poor accuracy, high noise and the like of an electric cylinder and an adjusting valve in the prior art, and provides an adjustable gap type double-nut ball screw electric cylinder assembly and an adjusting valve.
In order to achieve the above object, according to a first aspect of the present disclosure, the present invention provides an adjustable gap type double-nut ball screw electric cylinder assembly, which includes a hollow piston rod, a screw nut a, a ball screw, a wear-resistant ring, a split magnetic ring, a piston, an anti-rotation key, an adjustable gap gasket, a screw nut B, a dust ring, a bearing, and a ball reverser; the anti-rotation key is provided with a threaded hole, two sides of the cylindrical surface of the piston are provided with grooves matched with the anti-rotation key, and the anti-rotation key is locked with the screw to form a guide mechanism; two ends of the cylindrical surface are respectively provided with an annular groove, and a wear-resisting ring is arranged in the annular groove; a magnetic ring groove is arranged on the piston, split magnetic rings are arranged in the magnetic ring groove, and the split magnetic rings are positioned between the two wear-resistant rings; a screw nut A and a screw nut B are respectively arranged at two ends of the piston, and an inner hole of the piston is respectively matched with the outer circles of the screw nut A and the screw nut B; bearings matched with the ball screws are arranged in the screw nut A and the screw nut B; the screw nut A and the screw nut B are respectively provided with a flange, and the flanges on the screw nut A and the screw nut B are respectively arranged on two sides of the piston through screws; the ball reverser installation groove is formed in the screw nut A, an external connecting thread and a dust ring are arranged at one end of the screw nut A, and the screw nut A is connected with one end of the hollow piston rod through the external connecting thread; the screw nut A is provided with a ball reverser, the periphery of the ball screw is provided with a screw raceway, and the inner hole of the piston is provided with a spiral raceway matched with the screw raceway; and a gap adjusting gasket is arranged between one end of the piston and the flange of the screw nut B, and the thickness of the gap adjusting gasket is adjustable. The double anti-rotation device is arranged on the piston, the double lead screw nuts are arranged at two ends of the piston, and the gap adjusting gasket is arranged between the nuts and the piston, so that the positioning accuracy of the electric cylinder assembly is improved; the screw nut adopts a double-nut internal circulation structure, so that the number of circulation circles of the balls is increased, and the bearing capacity and the wear resistance of the screw assembly are enhanced.
According to the scheme, the gap adjusting gasket comprises a plurality of detachable U-shaped single gaskets, each U-shaped single gasket is provided with a U-shaped groove, and the U-shaped single gasket is provided with a plurality of limiting parts in the circumferential direction and used for fixing the U-shaped single gasket between one end of the piston and the flange of the lead screw nut B.
According to the scheme, the U-shaped single gaskets are internally provided with the magnets, so that a plurality of U-shaped single gaskets are overlapped in a crossed mode to form a composite gasket which is closed in the circumferential direction, the U-shaped single gaskets are convenient to disassemble, assemble and disassemble, increase and decrease, and the working stability of the electric cylinder assembly is improved.
According to the scheme, the plurality of limiting parts on the U-shaped single gasket are through holes, the U-shaped single gasket is fixed between the piston and the screw nut B through bolts, and after the plurality of U-shaped single gaskets are stacked in order, the U-shaped single gasket is fixed through the bolts to prevent the gaskets from loosening.
According to the scheme, the electric cylinder assembly further comprises a shell, and one end of the shell is provided with a flange.
According to another aspect of the present disclosure, the present disclosure further provides a regulating valve, including the electric cylinder assembly of any one of the foregoing aspects, further including a valve body, a valve plug, a spacer sleeve, a valve seat, an inlet, and an outlet; the electric cylinder assembly is fixedly arranged at the top of the valve body and used for driving the valve plug to move; the valve body is internally provided with an installation cavity and an adjusting cavity, the installation cavity is positioned at the upper part of the adjusting cavity, an isolation sleeve is arranged in the installation cavity, and the outer wall of the isolation sleeve is over against the channel of the inlet; the valve core is sleeved in the isolation sleeve, and the lower part of the valve core extends into the adjusting cavity; one end of the valve core is provided with a plurality of valve core convex parts and valve core concave parts, the inner wall of the adjusting cavity is provided with a plurality of valve body convex parts and valve body concave parts, and the valve core convex parts, the valve core concave parts, the valve body convex parts and the valve body concave parts have the same curvature; the valve core is provided with three working positions, when in the first working position, the lower part of the valve core is abutted against the valve seat to close the valve, and the valve core is contacted with the valve seat in a cambered surface manner; in the second working position, the valve core convex part faces the valve body convex part, the valve core concave part faces the valve body concave part, the minimum distance between the valve core convex part and the valve body convex part is D1, and the maximum distance between the valve core concave part and the valve body concave part is D2, wherein D2=5 × D1; and in the third working position, the valve core convex part faces the valve body concave part, the valve body convex part faces the valve core concave part, the distance between the valve core convex part and the valve body concave part and the distance between the valve body convex part and the valve core concave part are D3, and a fluid channel with constant width is formed between the valve core and the valve body, wherein D3=3 × D1. The adjusting valve is driven by an adjustable gap type double-nut ball screw electric cylinder assembly, so that the adjusting stability and the adjusting precision are higher; an isolation sleeve is sleeved on the periphery of the valve core, so that the valve core is prevented from being damaged due to direct impact of fluid on the valve core; the fluid channel of the adjusting cavity between the valve core and the valve body has a plurality of adjusting states, and the valve core is contacted with the valve seat through the cambered surface when in the first working position, so that the sealing property is greatly improved; in the opening process of the valve core, the valve core gradually transits from the first working position to the second working position, the difference value between the maximum flow area and the minimum flow area of the fluid channel of the adjusting cavity is gradually increased, the fluid pressure reduction and speed reduction effect is gradually increased, and the fluid pressure reduction and speed reduction effect is maximum in the second working position; when the second working position is transited to the third working position, the difference value between the maximum flow area and the minimum flow area of the fluid passage of the adjusting cavity is gradually reduced, the fluid flow and the pressure tend to be stable, and when the third working position is reached, the flow area of the fluid passage of the adjusting cavity is kept constant, and the fluid flow is most stable.
According to the scheme, the number of the valve core convex parts, the valve core concave parts, the valve body convex parts and the valve body concave parts is 2. The inner wall of the adjusting cavity and the surface of the valve core are both in a moderate arc surface shape, so that the buffering and the flow guiding can be effectively realized, the violent fluid impact is avoided, the fluid noise is reduced, and meanwhile, other required flow and pressure can be easily obtained.
According to the scheme, the hard alloy is adhered to the arc surfaces of the valve seat and the valve core, which are in contact with each other, so that the durability and the sealing performance of the valve seat and the valve core are improved. According to the scheme, the ceramic layer is arranged on the outer wall of the isolation sleeve, so that the erosion resistance of the isolation sleeve is improved.
According to the scheme, the valve seat and the valve body are integrally formed.
The invention provides an adjustable gap type double-nut ball screw electric cylinder assembly and an adjusting valve, which have the beneficial effects that:
1. be equipped with two anti-rotation devices on the piston, the piston both ends are equipped with the parallel lead screw nut, are equipped with the clearance gasket of transferring between nut and piston, have improved the positioning accuracy of electric cylinder subassembly. The screw nut adopts a double-nut internal circulation structure, so that the number of circulation circles of the balls is increased, and the bearing capacity and the wear resistance of the screw assembly are enhanced.
2. The adjusting valve is driven by an adjustable gap type double-nut ball screw electric cylinder assembly, and the adjusting stability and the adjusting precision are higher.
3. The isolating sleeve is sleeved on the periphery of the valve core, so that the valve core is prevented from being damaged due to the fact that fluid directly impacts the valve core.
4. The fluid channel of the adjusting cavity between the valve core and the valve body has a plurality of adjusting states, and the valve core is contacted with the valve seat through the cambered surface when in the first working position, so that the sealing property is greatly improved; when the device is in the second working position, the fluid can be buffered and decelerated through the unstable inner diameter of the fluid channel, the pressure is reduced, and the flow of the fluid is controlled, so that the fluid can be decompressed and decelerated, and the flow can be accurately adjusted; when the third working position is adopted, the inner diameter of the fluid channel is stable, so that the fluid flow can be kept stable; besides the three working positions, the inner wall of the adjusting cavity and the surface of the valve core are both in a moderate arc surface shape, so that the valve core can be effectively buffered and guided no matter whether in the three working positions, the pressure and the flow velocity of fluid are reduced, violent fluid impact is avoided, the noise of the fluid is reduced, and other required flow and pressure can be easily obtained.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic structural view of an adjustable gap type double nut ball screw electric cylinder assembly of the present invention;
FIG. 2 is a schematic structural view of a U-shaped single gasket of the adjustable gap type double-nut ball screw electric cylinder assembly of the invention;
FIG. 3 is a first operating position of the regulator valve of the present invention;
FIG. 4 is a second operating position of the regulator valve of the present invention;
fig. 5 shows a third operating position of the regulating valve according to the invention.
In the figure: 1. the device comprises an electric cylinder assembly, 101, a hollow piston rod, 102, screw nuts A, 103, a ball screw, 104, a wear-resistant ring, 105, split magnetic rings, 106, a piston, 107, an anti-rotation key, 108, a gap adjusting gasket, 109, screw nuts B, 110, a dust ring, 111, a bearing, 112 and a ball reverser; 1081. a limiting part 1082 and a U-shaped groove; 2. a valve body 21, a valve body convex part 22 and a valve body concave part; 3. a valve core 31, a valve core convex part 32 and a valve core concave part; 4. an isolation sleeve; 5. a valve seat; 6. an inlet; 7. and (7) an outlet.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some but not all of the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments herein without making any creative effort, shall fall within the scope of protection. It should be noted that the embodiments and features of the embodiments may be arbitrarily combined with each other without conflict.
Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".
Referring to fig. 1-2, a first embodiment of the present disclosure is provided, which proposes an adjustable gap type double-nut ball screw electric cylinder assembly, where the electric cylinder assembly 1 includes a hollow piston rod 101, a screw nut a102, a ball screw 103, a wear-resistant ring 104, a split magnetic ring 105, a piston 106, an anti-rotation key 107, a gap adjusting gasket 108, a screw nut B109, a dust ring 110, a bearing 111, and a ball reverser 112; a threaded hole is formed in the anti-rotation key 107, grooves matched with the anti-rotation key 107 are formed in two sides of the cylindrical surface of the piston 106, and the anti-rotation key 107 is locked with a screw to form a guide mechanism; two ends of the cylindrical surface are respectively provided with an annular groove, and a wear-resisting ring 104 is arranged in each annular groove; a magnetic ring groove is arranged on the piston 106, a split magnetic ring 105 is arranged in the magnetic ring groove, and the split magnetic ring 105 is positioned between the two wear-resistant rings 104; the two ends of the piston 106 are respectively provided with a lead screw nut A102 and a lead screw nut B109, and the inner hole of the piston 106 is respectively matched with the outer circles of the lead screw nut A102 and the lead screw nut B109; bearings 111 matched with the ball screw 103 are arranged in the screw nut A102 and the screw nut B109; the screw nut A102 and the screw nut B109 are respectively provided with a flange, and the flanges on the screw nut A102 and the screw nut B109 are respectively arranged on two sides of the piston 106 through screws; the lead screw nut A102 is provided with a ball reverser installation groove, one end of the lead screw nut A102 is provided with an external connecting thread and a dust ring 110, and the lead screw nut A102 is connected with one end of the hollow piston rod 101 through the external connecting thread; the screw nut A is provided with a ball reverser 112, the periphery of the ball screw 103 is provided with a screw raceway, and the inner hole of the piston 106 is provided with a spiral raceway matched with the screw raceway; a gap adjusting gasket 108 is arranged between one end of the piston 106 and a flange of the lead screw nut B109, and the thickness of the gap adjusting gasket 108 is adjustable. The double anti-rotation device is arranged on the piston, the double lead screw nuts are arranged at two ends of the piston, and the gap adjusting gasket is arranged between the nuts and the piston, so that the positioning precision of the electric cylinder assembly is improved; the screw nut adopts a double-nut internal circulation structure, so that the number of circulation circles of the balls is increased, and the bearing capacity and the wear resistance of the screw assembly are enhanced.
Further, the gap adjusting gasket 108 includes a plurality of detachable U-shaped single gaskets, each of the U-shaped single gaskets has a U-shaped groove 1082, and each of the U-shaped single gaskets has a plurality of limiting portions 1081 in the circumferential direction, so as to fix the U-shaped single gasket between one end of the piston 106 and the flange of the lead screw nut B109.
Furthermore, magnets are arranged in the U-shaped single gasket, so that the U-shaped single gasket can be conveniently installed. As long as with a plurality of U type single gasket alternately overlapping together, alright constitute a composite gasket that closes on circumference, both be convenient for U type single gasket's dismouting, increase and decrease, improved the stability of electricity jar subassembly work.
Further, the plurality of limiting portions 1081 on the U-shaped single gasket are all through holes, and the U-shaped single gasket is fixed between the piston 106 and the lead screw nut B109 through bolts.
With reference to fig. 3-5, a second embodiment of the present disclosure is provided, which proposes a regulating valve, comprising an electric cylinder assembly 1, preferably the electric cylinder assembly 1 of the first embodiment, further comprising a valve body 2, a valve core 3, a spacer sleeve 4, a valve seat 5, an inlet 6, an outlet 7; the electric cylinder assembly is fixedly arranged at the top of the valve body and used for driving the valve plug to move; the valve body 2 is internally provided with an installation cavity and an adjusting cavity, the installation cavity is positioned at the upper part of the adjusting cavity, an isolation sleeve 4 is arranged in the installation cavity, and the outer wall of the isolation sleeve 4 is over against the channel of the inlet 6; the valve core 3 is sleeved in the isolation sleeve 4, and the lower part of the valve core 3 extends into the adjusting cavity; one end of the valve core 3 is provided with a plurality of valve core convex parts 31 and valve core concave parts 32, the inner wall of the adjusting cavity is provided with a plurality of valve body convex parts 21 and valve body concave parts 22, and the valve core convex parts 31, the valve core concave parts 32, the valve body convex parts 21 and the valve body concave parts 22 have the same curvature; the valve core 3 has three working positions, when in the first working position, the lower part of the valve core 3 is abutted against the valve seat 5 to close the valve, and the valve core 3 is contacted with the valve seat 5 in a cambered surface manner; in the second operating position, the valve core protrusion 31 faces the valve body protrusion 21, the valve core recess 32 faces the valve body recess 22, the minimum distance between the valve core protrusion 31 and the valve body protrusion 21 is D1, and the maximum distance between the valve core recess 32 and the valve body recess 22 is D2, wherein D2=5 × D1; in the third operating position, the valve body protrusion 31 faces the valve body recess 22, the valve body protrusion 21 faces the valve body recess 32, the distance between the valve body protrusion 31 and the valve body recess 22 and the distance between the valve body protrusion 21 and the valve body recess 32 are D3, and a fluid passage with a constant width is formed between the valve body 2 and the valve body 3, wherein D3=3 × D1.
In one embodiment, the adjusting valve is driven by an adjustable gap type double-nut ball screw electric cylinder assembly, so that the adjusting stability and the adjusting precision are higher; an isolation sleeve is sleeved on the periphery of the valve core, so that the valve core is prevented from being damaged due to direct impact of fluid on the valve core; the fluid channel of the adjusting cavity between the valve core and the valve body has a plurality of adjusting states, and the valve core is contacted with the valve seat through the cambered surface when in the first working position, so that the sealing property is greatly improved; in the opening process of the valve core 3, the transition is gradually carried out from the first working position to the second working position, the difference value between the maximum flow area and the minimum flow area of the fluid channel of the adjusting cavity is gradually increased, the fluid pressure reduction and speed reduction effect is gradually increased, and the fluid pressure reduction and speed reduction effect is maximum in the second working position; when the second working position is transited to the third working position, the difference value between the maximum flow area and the minimum flow area of the fluid passage of the adjusting cavity is gradually reduced, the fluid flow and the pressure tend to be stable, and when the third working position is reached, the flow area of the fluid passage of the adjusting cavity is kept constant, and the fluid flow is most stable.
It can be stated that D2=8 × D1 and D3=4 × D1, which will result in better pressure reduction and deceleration of the valve element, while maintaining a high-precision flow rate regulation.
In a specific embodiment, the number of the valve core protrusions 31, the valve core recesses 32, the valve body protrusions 21, and the valve body recesses 22 is 2; the inner wall of the adjusting cavity and the surface of the valve core 3 are both in a moderate arc surface shape, so that the buffering and the flow guiding can be effectively realized, the violent fluid impact is avoided, the fluid noise is reduced, and meanwhile, other required flow and pressure can be easily obtained.
Furthermore, hard alloy is pasted on the cambered surfaces of the valve seat 5 and the valve core 3 which are in contact with each other, so that the durability and the sealing performance of the valve seat and the valve core are improved.
It can be stated that the outer wall of the spacer 4 is provided with a ceramic layer, which improves the erosion resistance of the spacer.
The embodiment of the invention provides an adjustable gap type double-nut ball screw electric cylinder assembly and an adjusting valve, wherein the electric cylinder assembly comprises a hollow piston rod, a screw nut A, a ball screw, a piston, an anti-rotation key, an adjustable gap gasket, a screw nut B, a ball reverser and the like; a gap adjusting gasket is arranged between one end of the piston and the flange of the lead screw nut B, the thickness of the gap adjusting gasket is adjustable, and the adjusting precision, the stability and the bearing capacity of the electric cylinder assembly are improved; in the regulating valve, one end of the valve core is provided with a plurality of valve core convex parts and valve core concave parts, and the inner wall of the regulating cavity is provided with a plurality of valve body convex parts and valve body concave parts. The piston is provided with the double anti-rotation device, the two sides of the piston are provided with the double lead screw nuts, and the gap adjusting gasket is arranged between the nuts and the piston, so that the positioning precision of the electric cylinder assembly is improved; an isolation sleeve is sleeved on the periphery of the valve core, so that the valve core is prevented from being damaged due to direct impact of fluid on the valve core; the fluid channel of the adjusting cavity between the valve core and the valve body has multiple adjusting states, so that the adjusting precision is improved, the buffering and the diversion can be effectively realized, and the fluid pressure and the noise are reduced.
The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
While the preferred embodiments herein have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following appended claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of this disclosure.
It will be apparent to those skilled in the art that various changes and modifications may be made herein without departing from the spirit and scope thereof. Thus, it is intended that such changes and modifications be included herein, provided they come within the scope of the appended claims and their equivalents.

Claims (10)

1. The utility model provides an adjustable clearance formula two nut ball screw electricity jar subassemblies which characterized in that: the electric cylinder assembly (1) comprises a hollow piston rod (101), a screw nut A (102), a ball screw (103), a wear-resistant ring (104), a split magnetic ring (105), a piston (106), an anti-rotation key (107), a gap adjusting gasket (108), a screw nut B (109), a dust ring (110), a bearing (111) and a ball reverser (112); the anti-rotation key (107) is provided with a threaded hole, two sides of the cylindrical surface of the piston (106) are provided with grooves matched with the anti-rotation key (107), and the anti-rotation key (107) is locked with a screw to form a guide mechanism; two ends of the cylindrical surface are respectively provided with an annular groove, and the annular groove is internally provided with the wear-resisting ring (104); a magnetic ring groove is formed in the piston (106), the split magnetic ring (105) is installed in the magnetic ring groove, and the split magnetic ring (105) is located between the two wear-resistant rings (104); the two ends of the piston (106) are respectively provided with the lead screw nut A (102) and the lead screw nut B (109), and the inner hole of the piston (106) is respectively matched with the outer circles of the lead screw nut A (102) and the lead screw nut B (109); the lead screw nut A (102) and the lead screw nut B (109) are internally provided with the bearings (111) matched with the ball screw (103); the screw nut A (102) and the screw nut B (109) are respectively provided with a flange, and the flanges on the screw nut A (102) and the screw nut B (109) are respectively arranged on two sides of the piston (106) through screws; a ball reverser installation groove is formed in the screw nut A (102), an external connecting thread and a dust ring (110) are arranged at one end of the screw nut A (102), and the screw nut A (102) is connected with one end of the hollow piston rod (101) through the external connecting thread; the ball reverser (112) is arranged on the screw nut A, a screw raceway is arranged on the periphery of the ball screw (103), and the inner hole of the piston (106) is provided with a spiral raceway matched with the screw raceway; the gap adjusting gasket (108) is arranged between one end of the piston (106) and a flange of the lead screw nut B (109), and the thickness of the gap adjusting gasket (108) is adjustable.
2. The adjustable gap double nut ball screw electric cylinder assembly of claim 1, wherein: the gap adjusting gasket (108) comprises a plurality of detachable U-shaped single gaskets, each U-shaped single gasket is provided with a U-shaped groove (1082), and the U-shaped single gasket is provided with a plurality of limiting parts (1081) in the circumferential direction and used for fixing the U-shaped single gasket between one end of the piston (106) and a flange of the lead screw nut B (109).
3. The adjustable gap double nut ball screw electric cylinder assembly of claim 2, wherein: and a magnet is arranged in the U-shaped single gasket.
4. The adjustable gap double nut ball screw electric cylinder assembly of claim 2, wherein: the limiting parts (1081) on the U-shaped single gasket are through holes, and the U-shaped single gasket is fixed between the piston (106) and the lead screw nut B (109) through bolts.
5. The adjustable gap double nut ball screw electric cylinder assembly of claim 1, wherein: the electric cylinder assembly (1) further comprises a shell, and a flange is arranged at one end of the shell.
6. A regulator valve comprising the electric cylinder assembly of any one of claims 1-5, wherein: the valve also comprises a valve body (2), a valve core (3), a spacer sleeve (4), a valve seat (5), an inlet (6) and an outlet (7); the electric cylinder assembly is fixedly arranged at the top of the valve body and used for driving the valve plug to move; the valve body (2) is internally provided with an installation cavity and an adjusting cavity, the installation cavity is positioned at the upper part of the adjusting cavity, an isolation sleeve (4) is arranged in the installation cavity, and the outer wall of the isolation sleeve (4) is over against a channel of the inlet (6); the valve core (3) is sleeved in the isolation sleeve (4), and the lower part of the valve core (3) extends into the adjusting cavity; one end of the valve core (3) is provided with a plurality of valve core convex parts (31) and valve core concave parts (32), the inner wall of the adjusting cavity is provided with a plurality of valve body convex parts (21) and valve body concave parts (22), and the valve core convex parts (31), the valve core concave parts (32), the valve body convex parts (21) and the valve body concave parts (22) have the same curvature; the valve core (3) is provided with at least three working positions, when in a first working position, the lower part of the valve core (3) is abutted against the valve seat (5) to close the valve, and the valve core (3) is in arc surface contact with the valve seat (5); in the second operating position, the valve body protrusion (31) faces the valve body protrusion (21), the valve body recess (32) faces the valve body recess (22), the minimum distance between the valve body protrusion (31) and the valve body protrusion (21) is D1, the maximum distance between the valve body recess (32) and the valve body recess (22) is D2, wherein D2=5 × D1; in a third working position, the valve core convex part (31) is opposite to the valve body concave part (22), the valve body convex part (21) is opposite to the valve core concave part (32), the distance between the valve core convex part (31) and the valve body concave part (22) and the distance between the valve body convex part (21) and the valve core concave part (32) are D3, a fluid channel with constant width is formed between the valve core (3) and the valve body (2), wherein D3= 3D 1.
7. The regulator valve according to claim 6, wherein: the number of the valve core convex parts (31), the valve core concave parts (32), the valve body convex parts (21) and the valve body concave parts (22) is 2.
8. The regulator valve according to claim 6, wherein: and hard alloy is stuck to the valve seat (5) and the valve core (3) at the arc surfaces contacted with each other.
9. The regulator valve according to claim 6, wherein: the outer wall of the isolation sleeve (4) is provided with a ceramic layer.
10. The regulator valve according to claim 6, wherein: the valve seat (5) and the valve body (2) are integrally formed.
CN202210754141.7A 2022-06-30 2022-06-30 Adjustable clearance type double-nut ball screw electric cylinder assembly and adjusting valve Active CN114877118B (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4239643A1 (en) * 1992-11-26 1993-04-08 Voith Gmbh J M Fluid flow throttle for a paper-making machine - uses flexible hose in pressure box between two pipes
US5527433A (en) * 1993-07-05 1996-06-18 J.M. Voith Gmbh Device and method for choking a stock suspension flow in a paper machine
CN200975457Y (en) * 2006-12-01 2007-11-14 山东济宁博特精密丝杠有限公司 High speed accurate ball guide-screw pair
CN201979336U (en) * 2011-03-28 2011-09-21 陆向辉 Double-nut gasket type internal recycling ball-screw assembly
CN103032580A (en) * 2012-12-27 2013-04-10 吴忠中创自控阀有限公司 Multi-stage throttling regulation valve
CN106884948A (en) * 2017-04-06 2017-06-23 山东大学 A kind of adjustable double nut ball screw assembly, of combined type pretightning force and installation method
CN208237113U (en) * 2018-05-18 2018-12-14 营口诚源机械设备有限公司 Flow control valve
CN209444815U (en) * 2018-12-07 2019-09-27 华润电力（贺州）有限公司 A kind of high-pressure multi-stage pressure reducing valve
CN212210718U (en) * 2020-07-03 2020-12-22 上海锐奎机械设备有限公司 Prevent changeing servo electronic jar

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4239643A1 (en) * 1992-11-26 1993-04-08 Voith Gmbh J M Fluid flow throttle for a paper-making machine - uses flexible hose in pressure box between two pipes
US5527433A (en) * 1993-07-05 1996-06-18 J.M. Voith Gmbh Device and method for choking a stock suspension flow in a paper machine
CN200975457Y (en) * 2006-12-01 2007-11-14 山东济宁博特精密丝杠有限公司 High speed accurate ball guide-screw pair
CN201979336U (en) * 2011-03-28 2011-09-21 陆向辉 Double-nut gasket type internal recycling ball-screw assembly
CN103032580A (en) * 2012-12-27 2013-04-10 吴忠中创自控阀有限公司 Multi-stage throttling regulation valve
CN106884948A (en) * 2017-04-06 2017-06-23 山东大学 A kind of adjustable double nut ball screw assembly, of combined type pretightning force and installation method
CN208237113U (en) * 2018-05-18 2018-12-14 营口诚源机械设备有限公司 Flow control valve
CN209444815U (en) * 2018-12-07 2019-09-27 华润电力（贺州）有限公司 A kind of high-pressure multi-stage pressure reducing valve
CN212210718U (en) * 2020-07-03 2020-12-22 上海锐奎机械设备有限公司 Prevent changeing servo electronic jar

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