Actuating mechanism with damping function

Abstract

The execution mechanism comprises a first cylinder sleeve and a piston rod, a first end cover and a second end cover are installed at the two ends of the first cylinder sleeve respectively, a damping piston matched with an inner cavity of the first cylinder sleeve is arranged in the inner cavity of the first cylinder sleeve, the damping piston divides the inner cavity of the first cylinder sleeve, and the piston rod is arranged in the inner cavity of the first cylinder sleeve. First air chambers are formed in the positions, on the two sides of the damping piston, of an inner cavity of the first cylinder sleeve respectively, a first through hole matched with the piston rod is formed in the first end cover, the piston rod penetrates through the first through hole, one end of the piston rod is fixedly connected with one end of the damping piston, and air ports are formed in the first end cover and the second end cover. According to the actuating mechanism with damping, the boundary dimension of the actuating mechanism can be reduced, field installation is facilitated, an external hydraulic oil pipeline does not need to be used, and the risk of leakage of the joint position in the hydraulic oil pipeline is avoided.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of actuator, and particularly relates to an actuator with damping. BACKGROUND

[0002] The actuator is an important component in the industrial automation control system, and is mainly used for driving the valve action, so as to realize the flow control of the medium. In some key positions, the action stability of the valve has very high requirements, such as the liquid nitrogen washing molecular sieve track ball valve. The existing straight stroke actuator is generally driven by the piston movement of the gas, so as to drive the valve rod action. However, the existing gas-driven straight stroke actuator does not utilize the strong compressibility of the gas, so that a series of problems such as crawling and shaking of the cylinder are prone to occur in the process of low-speed operation, which affects the use performance of the valve, and therefore it is necessary to improve. SUMMARY

[0003] In view of the above problems existing in the prior art, the purpose of the embodiments of the present application is to provide an actuator with damping.

[0004] The technical scheme adopted by the embodiments of the present application is an actuator with damping, comprising: a first cylinder sleeve and a piston rod, the two ends of the first cylinder sleeve are respectively provided with a first end cover and a second end cover, the inner cavity of the first cylinder sleeve is provided with a damping piston matched therewith, the damping piston separates the inner cavity of the first cylinder sleeve, and the inner cavity of the first cylinder sleeve is respectively configured with a first gas chamber on both sides of the damping piston, a first through hole matched with the piston rod is formed in the first end cover, the piston rod passes through the first through hole, and one end of the piston rod is fixedly connected with one end of the damping piston, and the first end cover and the second end cover are both provided with a gas port.

[0005] Further, the damping piston comprises a first piston plate and a second piston plate, the first piston plate and the second piston plate are arranged in parallel, and the edges of the first piston plate and the second piston plate are tightly attached to the inner cavity wall of the first cylinder sleeve, and a second gas chamber is formed between the first piston plate and the second piston plate in the first cylinder sleeve.

[0006] Further, the damping piston is internally provided with a hydraulic damping mechanism, the hydraulic damping mechanism comprises a plurality of second cylinder sleeves, the second cylinder sleeves are arranged perpendicularly to the first piston plate and the second piston plate, two ends of the second cylinder sleeves are fixedly connected to the first piston plate and the second piston plate respectively, so that the first piston plate and the second piston plate block the two ends of the second cylinder sleeves, the second cylinder sleeves are internally provided with oil cylinder throttling cores, the oil cylinder throttling cores are parallel to the first piston plate and the second piston plate, and both sides of the oil cylinder throttling cores are fixedly connected with connecting rods, the first piston plate and the second piston plate are both provided with third through holes matched with the connecting rods, the connecting rods on both sides of the oil cylinder throttling cores pass through the third through holes and are fixedly connected with first end covers and second end covers respectively, and the second cylinder sleeves are filled with fluid media.

[0007] Further, the hydraulic damping mechanism further comprises a partition plate, the partition plate is arranged between the first piston plate and the second piston plate and is parallel to the first piston plate and the second piston plate, the partition plate divides the second air chamber into two parts, the top and bottom of the partition plate are respectively provided with air ports, the edge of the partition plate is fixedly connected with the inner cavity wall of the first cylinder sleeve, the partition plate is provided with a second through hole parallel to the length direction of the second cylinder sleeve and matched with the second cylinder sleeve, the second cylinder sleeve passes through the second through hole, and the second cylinder sleeve slides in the second through hole.

[0008] Further, one side of the first piston plate and the second piston plate close to the second cylinder sleeve is provided with a groove matched with the second cylinder sleeve, and the end of the second cylinder sleeve is embedded into the groove.

[0009] Further, the oil cylinder throttling core comprises a disc body, the edge of the disc body is tightly attached to the inner wall of the second cylinder sleeve, and a plurality of through holes are formed in the disc body.

[0010] Further, the hydraulic damping mechanism further comprises a fixing rod, the fixing rod is fixedly connected with the first piston plate and the second piston plate, one end of the fixing rod away from the piston rod penetrates the second piston plate, the end of the fixing rod away from the piston rod extends to one side of the second piston plate close to the second end cover, the partition plate is provided with a fourth through hole, the fixing rod passes through the fourth through hole, and the rod wall of the fixing rod is tightly attached to the hole wall of the fourth through hole to form a seal.

[0011] Further, a limiting screw column is arranged on the second end cover coaxially with the fixing rod.

[0012] Further, a fifth through hole is formed on the second end cover coaxially with the fixing rod, the limiting screw column is inserted from the fifth through hole, and a nut matched with the limiting screw column is arranged on the second end cover coaxially with the fixing rod.

[0013] Further, a guide ring is arranged on the inner wall of the first through hole, the side wall of the first piston plate, the side wall of the second piston plate, the inner wall of the second through hole and the inner wall of the third through hole.

[0014] Compared with the prior art, the actuator with damping provided by the technical scheme can reduce the size of the actuator, facilitate field installation, and avoid the risk of leakage at the joint position of the hydraulic oil pipeline without using an external hydraulic oil pipeline.

[0015] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory in nature and are not intended to limit the present application.

[0016] The summary of various implementations or examples of the technology described in the present application is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF DRAWINGS

[0017] In the drawings, which are not necessarily drawn to scale, like numerals can describe similar components in different views. Like numerals having different letter suffixes can represent different instances of the like components. The drawings illustrate generally, by way of example, various embodiments of the present application and are not intended to limit the present application in any way. The same or similar reference numerals in different drawings can represent the same or similar functionality. Such embodiments of the inventive concept can be employed in any combination, sub-combination, or in any order, as is apparent from the description herein. Such embodiments are illustrative, and not intended to be exhaustive or exclusive, of the present device or method.

[0018] Figure 1 Structure schematic view of the embodiment of the present application;

[0019] Figure 2 Structure schematic view of the embodiment of the present application; Figure 1 Enlarged view of A of the structure schematic view of the embodiment of the present application; DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiment of the present application more clear, the technical scheme of the embodiment of the present application will be described clearly and completely below in combination with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, rather than all the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the scope of protection of the present application.

[0021] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the meanings as commonly understood by one of ordinary skill in the art to which this application belongs. The terms "first", "second", and similar terms are used to distinguish one element from another, but are not otherwise intended to refer to an order or sequence unless otherwise indicated. The terms "including", "containing", and similar terms are intended to be inclusive and are used without excluding other elements or steps. The terms "connected", "coupled", and similar terms are intended to be inclusive and are used without limiting the nature of the connection or coupling to direct and physical, unless otherwise indicated. The terms "upper", "lower", "left", "right", and the like are used only to describe relative positions, and can be changed when the absolute positions of the described objects are changed.

[0022] In order to keep the following description of the embodiments of the present application clear and concise, detailed description of known functions and known components is omitted.

[0023] Referring to Figures 1 to 2 , Embodiment 1

[0024] The embodiment of the present application provides an actuator with damping, comprising a first cylinder sleeve 1 and a piston rod 2, first and second end covers 3 and 4 are respectively arranged at two ends of the first cylinder sleeve 1, a damping piston is arranged in the inner cavity of the first cylinder sleeve 1, the damping piston divides the inner cavity of the first cylinder sleeve 1, and first air chambers 5 are respectively arranged on two sides of the damping piston, a first through hole 6 is arranged on the first end cover 3 and matched with the piston rod 2, the piston rod 2 passes through the first through hole 6, and one end of the piston rod 2 is fixedly connected with one end of the damping piston, and air ports are arranged on the first and second end covers 3 and 4. The actuator with damping provided by the technical scheme uses the damping piston, and the damping mechanism arranged in the actuator can reduce the size of the actuator and facilitate on-site installation.

[0025] When the piston rod 2 is extended, air is supplied to the first air chamber 5 above the damping piston from the air port on the second end cover 4, and air in the first air chamber 5 below the damping piston is discharged from the air port on the first end cover 3; conversely, when the piston rod 2 is retracted, air in the first air chamber 5 above the damping piston is discharged from the air port on the second end cover 4, and air is supplied to the first air chamber 5 below the damping piston from the air port on the first end cover 3.

[0026] The damping piston comprises first and second piston plates 7 and 8, the first and second piston plates 7 and 8 are arranged in parallel, edges of the first and second piston plates 7 and 8 are tightly attached to the inner cavity wall of the first cylinder sleeve 1, and a second air chamber 9 is formed between the first and second piston plates 7 and 8 in the first cylinder sleeve 1.

[0027] The second gas chamber 9 formed between the first piston plate 7 and the second piston plate 8 is used in the embodiment, and the strong compressibility of the gas is used as damping, so that the external hydraulic oil pipeline is not needed, and the risk of leakage at a joint position in the hydraulic oil pipeline is avoided.

[0028] Embodiment 2

[0029] The embodiment of the application further provides an actuating mechanism with damping, which comprises a first cylinder sleeve 1 and a piston rod 2, first and second end covers 3 and 4 are respectively arranged at two ends of the first cylinder sleeve 1, a damping piston is arranged in the inner cavity of the first cylinder sleeve 1 and matched with the first cylinder sleeve 1, the damping piston divides the inner cavity of the first cylinder sleeve 1, and first gas chambers 5 are respectively arranged on two sides of the damping piston in the inner cavity of the first cylinder sleeve 1, a first through hole 6 is arranged on the first end cover 3 and matched with the piston rod 2, the piston rod 2 passes through the first through hole 6, and one end of the piston rod 2 is fixedly connected with one end of the damping piston, and gas outlets are arranged on the first and second end covers 3 and 4. The actuating mechanism with damping provided by the technical scheme has the damping piston, and the damping mechanism is arranged in the actuating mechanism, so that the size of the actuating mechanism can be reduced, and field installation is facilitated.

[0030] When the piston rod 2 is extended, the first gas chamber 5 above the damping piston is supplied with gas from the gas outlet on the second end cover 4, and the first gas chamber 5 below the damping piston is discharged with gas from the gas outlet on the first end cover 3; conversely, when the piston rod 2 is retracted, the first gas chamber 5 above the damping piston is discharged with gas from the gas outlet on the second end cover 4, and the first gas chamber 5 below the damping piston is supplied with gas from the gas outlet on the first end cover 3. The damping piston is driven by gas pressure.

[0031] The damping piston comprises first and second piston plates 7 and 8, the first and second piston plates 7 and 8 are arranged in parallel, edges of the first and second piston plates 7 and 8 are tightly attached to the inner cavity wall of the first cylinder sleeve 1, and a second gas chamber 9 is formed between the first and second piston plates 7 and 8 in the first cylinder sleeve 1. In the embodiment, the hydraulic damping mechanism is arranged in the damping piston, so that the external hydraulic oil pipeline is not needed, and the risk of leakage at a joint position in the hydraulic oil pipeline is avoided.

[0032] The hydraulic damping mechanism comprises a plurality of second cylinder sleeves 10, the second cylinder sleeves 10 are arranged perpendicularly to the first piston plate 7 and the second piston plate 8, two ends of the second cylinder sleeves 10 are fixedly connected with the first piston plate 7 and the second piston plate 8 respectively, so that the first piston plate 7 and the second piston plate 8 block the two ends of the second cylinder sleeves 10, an oil cylinder throttling core is arranged in the second cylinder sleeves 10, the oil cylinder throttling core is parallel to the first piston plate 7 and the second piston plate 8, and connecting rods 12 are fixedly connected with two sides of the oil cylinder throttling core, third through holes 13 matched with the connecting rods 12 are formed in the first piston plate 7 and the second piston plate 8, the connecting rods 12 on the two sides of the oil cylinder throttling core pass through the third through holes 13 and are fixedly connected with the first end cover 3 and the second end cover 4 respectively, and the second cylinder sleeves 10 are filled with fluid medium.

[0033] The second cylinder sleeves 10 are integrated into the actuator cylinder, so that the size of the actuator is reduced, and the on-site installation is facilitated; the second cylinder sleeves 10 are integrated into the actuator first cylinder sleeve 1, the two ends of the second cylinder sleeves 10 are sealed by the first piston plate 7 and the second piston plate 8, and there is no need to arrange external hydraulic oil pipelines, so that the leakage points are reduced, and the risk of hydraulic oil leakage is reduced. Meanwhile, the small-size second cylinder sleeves 10 can reduce the use of fluid medium, and help to save cost, which is more significant in the design of large-size actuators. In use, gas enters from the first end cover 3 air inlet, pushes the damping piston to move downward, the fluid medium in the second cylinder sleeves 10 is throttled by the oil cylinder throttling core, so as to achieve the damping effect on the damping piston, and the stability of the actuator in the action process is ensured.

[0034] The hydraulic damping mechanism further comprises a partition plate 14, the partition plate 14 is arranged between the first piston plate 7 and the second piston plate 8, and the partition plate 14 is parallel to the first piston plate 7 and the second piston plate 8, the partition plate 14 divides the second air chamber 9 into two parts, the top and bottom of the partition plate 14 are respectively provided with air ports, the edge of the partition plate 14 is fixedly connected with the inner cavity wall of the first cylinder sleeve 1, the partition plate 14 is provided with a second through hole 15 parallel to the length direction of the second cylinder sleeve 10 and matched with the second cylinder sleeve 10, the second cylinder sleeve 10 passes through the second through hole 15, and the second cylinder sleeve 10 slides in the second through hole 15. The partition plate 14 is used for supporting the second cylinder sleeve 10, so that the second cylinder sleeve 10 can stably displace and operate in the second through hole 15.

[0035] When the piston rod 2 extends, the gas in the second gas chamber 9 above the partition plate 14 is discharged from the gas port at the top of the partition plate 14, and the gas in the second gas chamber 9 below the partition plate 14 is supplied from the gas port at the bottom of the partition plate 14; conversely, when the piston rod 2 retracts, the gas in the second gas chamber 9 above the partition plate 14 is supplied from the gas port at the top of the partition plate 14, and the gas in the second gas chamber 9 below the partition plate 14 is discharged from the gas port at the bottom of the partition plate 14. The gas pressure is used to drive the damping piston.

[0036] The first piston plate 7 and the second piston plate 8 are provided with recesses 16 on the side close to the second cylinder sleeve 10, and the end of the second cylinder sleeve 10 is embedded in the recess 16. The first piston plate 7 and the second piston plate 8 seal the two ends of the second cylinder sleeve 10, and the embedding of the end of the second cylinder sleeve 10 in the recess 16 helps to improve the sealing effect.

[0037] The oil cylinder throttling core includes a disc body 11, the edge of the disc body 11 is tightly attached to the inner wall of the second cylinder sleeve 10, and a plurality of through holes are formed in the disc body 11. In use, the fluid medium in the second cylinder sleeve 10 flows through the through holes in the disc body 11, thereby playing a damping role.

[0038] The hydraulic damping mechanism further comprises a fixed rod 17, the fixed rod 17 is fixedly connected to the first piston plate 7 and the second piston plate 8, and the end of the fixed rod 17 away from the piston rod 2 penetrates the second piston plate 8, so that the end of the fixed rod 17 away from the piston rod 2 extends to the side of the second piston plate 8 close to the second end cover 4, the fourth through hole 18 is formed in the partition plate 14, the fixed rod 17 passes through the fourth through hole 18, and the rod wall of the fixed rod 17 is tightly attached to the hole wall of the fourth through hole 18 to form a seal. The fixed rod 17 is used to strengthen the connection between the first piston plate 7 and the second piston plate 8, reduce the stress of the second cylinder sleeve 10 to protect the second cylinder sleeve 10, and the end of the fixed rod 17 away from the piston rod 2 extends to the side of the second piston plate 8 close to the second end cover 4, the extended end is used to keep the first gas chamber 5 close to the second end cover 4, avoid the direct contact between the second piston plate 8 and the second end cover 4, block the gas inlet on the second end cover 4, and cause difficulty in pushing the damping piston.

[0039] The second end cover 4 is provided with a limiting screw column 19 coaxial with the fixed rod 17. The second end cover 4 is provided with a fifth through hole 20 coaxial with the fixed rod 17, the limiting screw column 19 is inserted into the fifth through hole 20, and the second end cover 4 is provided with a nut 21 coaxial with the fixed rod 17 and matched with the limiting screw column 19. The limiting screw column 19 is used to limit the distance between the second piston plate 8 and the second end cover 4, avoid the direct contact between the second piston plate 8 and the second end cover 4, block the gas inlet on the second end cover 4, and cause difficulty in pushing the damping piston. The limiting screw column 19 matched with the nut 21 can adjust the distance between the second piston plate 8 and the second end cover 4, which is convenient to use.

[0040] A guide ring is mounted on the inner wall of the first through hole 6, the first piston plate 7 side wall, the second piston plate 8 side wall, the inner wall of the second through hole 15 and the inner wall of the third through hole 13. The guide ring is used to prevent wear of the moving parts, plays a protective role for the moving parts, and also plays a role in filling the gap to improve the sealing effect at the third through hole 13.

[0041] The above description is intended to be illustrative and not restrictive, and those ordinarily skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present disclosure. Moreover, the above examples (or one or more aspects thereof) can be used in combination with each other, and these embodiments can be combined with each other in various combinations or arrangements.

Claims

1. An actuator with damping, comprising: The first cylinder sleeve (1) and the piston rod (2), both ends of the first cylinder sleeve (1) are respectively provided with a first end cover (3) and a second end cover (4), characterized in that the inner cavity of the first cylinder sleeve (1) is provided with a damping piston matched therewith, the damping piston separates the inner cavity of the first cylinder sleeve (1), and the inner cavity of the first cylinder sleeve (1) is respectively provided with a first gas chamber (5) on both sides of the damping piston, the first end cover (3) is provided with a first through hole (6) matched with the piston rod (2), the piston rod (2) passes through the first through hole (6), and one end of the piston rod (2) is fixedly connected with one end of the damping piston, and the first end cover (3) and the second end cover (4) are both provided with a gas port.

2. An actuator with damping according to claim 1, characterized in that The damping piston comprises a first piston plate (7) and a second piston plate (8), the first piston plate (7) and the second piston plate (8) are arranged in parallel, and the edges of the first piston plate (7) and the second piston plate (8) are tightly attached to the inner cavity wall of the first cylinder sleeve (1), and the first piston plate (7) and the second piston plate (8) form a second gas chamber (9) in the first cylinder sleeve (1).

3. An actuator with damping according to claim 2, characterized in that The damping piston is provided with a hydraulic damping mechanism, the hydraulic damping mechanism comprises a plurality of second cylinder sleeves (10), the second cylinder sleeves (10) are arranged perpendicular to the first piston plate (7) and the second piston plate (8), and the two ends of the second cylinder sleeves (10) are fixedly connected with the first piston plate (7) and the second piston plate (8) respectively, so that the first piston plate (7) and the second piston plate (8) block the two ends of the second cylinder sleeves (10), the second cylinder sleeves (10) are provided with an oil cylinder throttling core, the oil cylinder throttling core is parallel to the first piston plate (7) and the second piston plate (8), and the two sides of the oil cylinder throttling core are fixedly connected with connecting rods (12), the first piston plate (7) and the second piston plate (8) are both provided with third through holes (13) matched with the connecting rods (12), and the connecting rods (12) on both sides of the oil cylinder throttling core pass through the third through holes (13) and are fixedly connected with the first end cover (3) and the second end cover (4) respectively, and the second cylinder sleeves (10) are filled with fluid medium.

4. An actuator with damping according to claim 3, characterized in that The hydraulic damping mechanism further comprises a partition plate (14), the partition plate (14) is arranged between the first piston plate (7) and the second piston plate (8), and the partition plate (14) is parallel to the first piston plate (7) and the second piston plate (8), the partition plate (14) divides the second gas chamber (9) into two parts, the top and bottom of the partition plate (14) are respectively provided with a gas port, the edges of the partition plate (14) are fixedly connected with the inner cavity wall of the first cylinder sleeve (1), the partition plate (14) is provided with a second through hole (15) matched with the second cylinder sleeve (10) in the length direction of the second cylinder sleeve (10), the second cylinder sleeve (10) passes through the second through hole (15), and the second cylinder sleeve (10) slides in the second through hole (15).

5. An actuator with damping according to claim 3, characterized in that The first piston plate (7) and the second piston plate (8) are provided with recesses (16) matched with the second cylinder sleeve (10) on the side close to the second cylinder sleeve (10), and the end of the second cylinder sleeve (10) is embedded into the recess (16).

6. An actuator with damping according to claim 3, characterized in that The oil cylinder throttling core comprises a disc body (11), the edge of the disc body (11) is tightly attached to the inner wall of the second cylinder sleeve (10), and a plurality of through holes are formed in the disc body (11).

7. An actuator with damping according to claim 4, characterized in that The hydraulic damping mechanism further comprises a fixed rod (17) fixedly connected with the first piston plate (7) and the second piston plate (8), and the end of the fixed rod (17) away from the piston rod (2) penetrates through the second piston plate (8), so that the end of the fixed rod (17) away from the piston rod (2) extends to the side of the second piston plate (8) close to the second end cover (4), the fourth through hole (18) is formed in the partition plate (14), the fixed rod (17) passes through the fourth through hole (18), and the rod wall of the fixed rod (17) is tightly attached to the hole wall of the fourth through hole (18) to form a seal.

8. An actuator with damping according to claim 7, characterized in that The second end cover (4) is provided with a limiting screw column (19) coaxial with the fixed rod (17).

9. An actuator with damping according to claim 8, characterized in that The second end cover (4) is provided with a fifth through hole (20) coaxial with the fixed rod (17), the limiting screw column (19) is inserted into the fifth through hole (20), and the second end cover (4) is provided with a nut (21) coaxial with the fixed rod (17) and matched with the limiting screw column (19).

10. An actuator with damping according to claim 4, characterized in that The inner wall of the first through hole (6), the side wall of the first piston plate (7), the side wall of the second piston plate (8), the inner wall of the second through hole (15) and the inner wall of the third through hole (13) are all provided with guide rings.

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