A lever-driven actuator

Abstract

The present invention provides a lever-driven actuator, comprising an oil motor device, a feedback device and a lever device; the present invention adopts a lever-driven method, and after being connected to a regulating valve stem through a connecting piece, the lift control of the regulating valve can be realized, which is beneficial to reducing the height of the unit and saving usage space; the present invention can realize the reciprocating motion of the lever mechanism through the interaction between the oil motor mechanism and the spring feedback mechanism, and can also realize manual control through the interaction between the designed threaded transmission structure and the spring feedback mechanism, which is convenient to operate; the oil motor of the present invention can realize automatic control after being connected to an electro-hydraulic control module.

Description

Technical Field

[0001] The invention belongs to the field of marine machinery, and in particular relates to a lever-driven actuator. Background Art

[0002] As marine steam turbine power levels increase and steam parameters improve, the size and weight of control valves also increase, while requirements for equipment space, weight, unit density, and economic efficiency become more stringent. Existing control valve drive mechanisms are typically connected in series, resulting in a large overhead space occupied by the unit. This, coupled with limited space on board, creates inconveniences in installation, maintenance, and repair. Summary of the Invention

[0003] The present invention aims to provide a lever-driven actuator with a more compact structure. After connecting to a regulating valve, it controls the valve's lift via lever drive. This helps reduce the unit's height, saves installation space, and provides more space for subsequent repair and maintenance.

[0004] A lever-driven actuator comprises an oil motor device, a feedback device and a lever device; the oil motor device comprises a lower housing, an intermediate housing, an upper housing and a piston rod; the upper and lower ends of the intermediate housing are respectively installed with an upper housing and a housing; the lower housing is fixed to the base; the piston rod passes through the upper housing and is installed inside the intermediate housing, and the piston rod is connected to the connecting sleeve; the connecting sleeve is connected to the lever through a pin and a retaining ring; the lever device comprises a lever, a lever arm and a locking nut; the lever and the lever arm are fixed by a locking nut; the feedback device comprises a spring seat, a spring, a spring pressure seat, a sleeve pressure plate and a rotating nut; the spring pressure seat is designed with a hole structure in the middle and pin structures at both ends, and after the shaft passes through the spring seat in the middle, the lower end compresses the spring and is connected to the lever arm; the upper end of the spring seat is covered with a sleeve pressure plate and fixed by a rotating nut; the bottom of the spring seat is connected to the base.

[0005] Furthermore, the intermediate shaft of the spring seat is a threaded structure, connected to the threaded sleeve, and fixed and prevented from loosening by a locking nut.

[0006] Furthermore, a fulcrum connection portion is provided at the left end of the lever arm, which can be connected to a structure such as a fixed bracket through a pin shaft to realize the rotational movement of the lever mechanism around the fulcrum.

[0007] The beneficial effects of the present invention are:

[0008] (1) The present invention adopts a lever-driven method. After being connected to the valve stem of the regulating valve through a connecting piece, the lift control of the regulating valve can be realized, which is beneficial to reducing the height of the unit and saving space.

[0009] (2) The present invention can realize the reciprocating motion of the lever mechanism through the interaction between the oil motor mechanism and the spring feedback mechanism, and can also realize manual control through the interaction between the designed threaded transmission structure and the spring feedback mechanism, which is convenient to operate;

[0010] (3) The hydraulic motor of the present invention can realize automatic control after being connected to the electro-hydraulic control module. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the main view of the actuator;

[0012] Figure 2 A top view of the actuator. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] like Figure 1 and Figure 2 As shown, a lever-driven actuator includes an oil motor device, a feedback device and a lever device;

[0015] The oil motor device is mainly composed of a lower housing 1, an intermediate housing 2, an upper housing 3, a piston rod 8, etc., and is tightened by a flat washer 4, a spring washer 5, a stud 6, and a nut 7; the piston rod 8 moves up and down in the inner cavity of the intermediate housing 2, is driven by hydraulic pressure, and has a threaded structure designed at the end, and is connected to the lever 23 through a connecting sleeve 10, a pin 20, and a retaining ring 19. The lower end of the connecting sleeve 10 is tightened by a locking nut 9 to prevent loosening; the lower housing 1 is connected to the base 18 through a pin 20 and a retaining ring 19.

[0016] The feedback device mainly consists of a spring seat 14, a spring 15, a spring pressure seat 13, a sleeve pressure plate 12, a rotating nut 11, a threaded sleeve 16, a locking nut 17, etc.; the spring pressure seat 13 is designed with a hole structure in the middle and a pin structure at both ends. After the axis passes through the spring seat 14 in the middle, the lower end compresses the spring 15 and is connected to the hook of the lever arm 22; the end of the spring seat 14 is designed with a threaded structure, which is connected to the rotating nut 11 after being put on the sleeve pressure plate 12; the middle shaft of the spring seat 14 is also designed with a threaded structure, which is connected to the threaded sleeve 16 and fixed to prevent loosening by a locking nut 17; the bottom of the spring seat 14 is connected to the base 18 through a pin 20 and a retaining ring 19.

[0017] The lever mechanism primarily consists of a lever 23, a lever arm 22, a locking nut 21, and a connector 24. Lever 23 and lever arm 22 are tightened together via locking nut 21 to achieve synchronous movement. A fulcrum connection is designed at the left end of lever arm 22, which can be connected to a fixed bracket or other structure via a pin, enabling the lever mechanism to rotate around the fulcrum.

[0018] When the actuator is driven by an oil motor, the hydraulic pressure drives piston rod 8 downward, driving lever 23 and lever arm 22 to rotate counterclockwise against spring 15. In the reverse direction, spring 15 automatically resets the actuator, allowing counterclockwise rotation. During manual control, the rotating nut 11 rotates downward, driving sleeve pressure plate 12 downward. This overcomes spring 15, pressing lever arm 22 and lever 23 clockwise. Conversely, rotating the rotating nut 11 in the reverse direction causes the lever arm 22 and lever 23 to rotate counterclockwise due to the spring 15's reset. Furthermore, during manual control, the operating force can be reduced by eliminating spring 15. The screw drive between the rotating nut 11 and spring seat 14 drives sleeve pressure plate 12 downward, achieving clockwise rotation of the lever mechanism. Once the lever mechanism reaches the desired position, it can be locked and secured by threaded sleeve 16 and locknut 17. Conversely, when the rotating nut 11 is loosened, the screw drive between the threaded sleeve 16 and spring seat 14 allows the lever mechanism to rotate counterclockwise.

[0019] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A lever-driven actuator, characterized in that: The invention comprises an oil motor device, a feedback device and a lever device; the oil motor device comprises a lower housing (1), an intermediate housing (2), an upper housing (3) and a piston rod (8); the upper end and the lower end of the intermediate housing (2) are respectively mounted with the upper housing (3) and the housing (1); the lower housing (1) is fixed on a base (18); the piston rod (8) passes through the upper housing (3) and is mounted inside the intermediate housing (2); the piston rod (8) is connected to a connecting sleeve (10); the connecting sleeve (10) is connected to a lever (23) through a pin (20) and a retaining ring (19); the lever device comprises a lever (23), a lever arm (2 2) and a locking nut (21); the lever (23) and the lever arm (22) are fixed by a locking nut (21); the feedback device comprises a spring seat (14), a spring (15), a spring pressure seat (13), a sleeve pressure plate (12), and a rotating nut (11); the spring pressure seat (13) is designed with a hole structure in the middle and a pin structure at both ends, and after the shaft of the spring seat (14) passes through the middle, the lower end compresses the spring (15) and is connected to the lever arm (22); the upper end of the spring seat (14) is covered with a sleeve pressure plate (12) and fixed by a rotating nut (11); the bottom of the spring seat (14) is connected to the base (18); The left end of the lever arm (22) is provided with a fulcrum connection portion, which can be connected to the fixed bracket structure through a pin shaft to realize the rotational movement of the lever mechanism around the fulcrum.

2. A lever-driven actuator according to claim 1, characterized in that: The intermediate shaft of the spring seat (14) is a threaded structure, connected to the threaded sleeve (16), and fixed and prevented from loosening by a locking nut (17).

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