A compact integrated electro-hydraulic actuator for marine applications

Abstract

The utility model belongs to the field of electro -hydraulic actuator, concretely relates to a marine compact integrated electro -hydraulic actuator, including the casing, the front end of casing is equipped with the shell cover, and inside is provided with the bearing seat, the inside of bearing seat is provided with the gear shaft of the shell cover, and the hydraulic mechanism includes the oil cylinder of setting in the both ends of casing, the end of oil cylinder is formed with the closure, is equipped with the oil way of the oil cavity of the shell oil channel and the closure in the closure, and the hydraulic mechanism, oil supply mechanism and casing are integrally casted into the shape, and the built -in oil way oil channel cooperates and spares the complicated external pipeline, and the double oil cylinder design ensures that the output torque and the movement speed of actuator in the two directions of opening and closing are consistent, the valve control precision is high, the performance is stable and reliable, the torque of piston rack and pinion shaft engagement output is larger, provides enough power control valve opening and closing in the compact space.

Description

Technical Field

[0001] This utility model relates to the field of electro-hydraulic actuators, specifically to a marine compact integrated electro-hydraulic actuator. Background Technology

[0002] Electro-hydraulic actuators are valve control devices with hydraulic drive as their core. They use a hydraulic pump to pump oil to push the valve stem and adjust the valve opening. They feature precise control and high reliability. Compared with pneumatic and electric actuators, electro-hydraulic actuators have greater thrust and higher precision.

[0003] Existing electro-hydraulic actuators require complex external piping connections between the motor, oil pump, oil tank, valve block, and actuator. The loose layout and large overall size make them difficult to install in spaces with extremely limited space. Numerous external hydraulic lines and joints pose potential leakage points, and the risk of leakage is particularly prominent in harsh environments such as ship vibration and salt spray corrosion. Utility Model Content

[0004] (I) Purpose of the utility model

[0005] To address the technical problems existing in the background art, this utility model proposes a compact integrated electro-hydraulic actuator for marine applications, which features small footprint, large thrust, high rotational stability, and high precision.

[0006] (II) Technical Solution

[0007] To solve the above-mentioned technical problems, this utility model provides a marine compact integrated electro-hydraulic actuator, including a housing, a housing cover installed at the front end of the housing, and a bearing seat provided inside the housing, and a gear shaft passing through the housing cover is provided inside the bearing seat.

[0008] The hydraulic mechanism includes oil cylinders disposed at both ends of the housing. The ends of the oil cylinders are formed with caps. The caps have oil passages that connect the oil passages of the housing and the oil chambers of the caps. A piston rack that meshes with the gear shaft is movably installed between the two oil cylinders.

[0009] The oil supply mechanism includes a motor mounted on the top of the housing. The output end of the motor is connected to a high-pressure oil pump. The inlet end of the high-pressure oil pump is connected to an oil tank, and the outlet end is connected to the left and right oil passages of the housing through a valve block.

[0010] Preferably, a limit switch is provided on the outer side of the gear shaft to cooperate with it, and the limit switch is connected to the motor via a signal feedback device.

[0011] Preferably, the middle part of the piston rack is a rack structure and the two ends are piston structures. During the movement of the pistons at both ends along the inner cavity of the oil cylinder, the piston rack meshes with the gear shaft.

[0012] Preferably, the hydraulic cylinders at both ends of the housing have the same structure, and both end caps are equipped with hydraulic circuits of the same structure.

[0013] Preferably, the motor is equipped with a temperature control sensor for monitoring temperature.

[0014] Preferably, the fuel tank is provided with a viewing window, a refueling port, and a drain port.

[0015] The above-mentioned technical solution of this utility model has the following beneficial technical effects: the hydraulic mechanism, oil supply mechanism and housing are integrally cast and molded, the built-in oil circuit and oil passage are matched to eliminate the cumbersome external pipes, and the dual oil cylinder design ensures that the output torque and movement speed of the actuator are consistent in both opening and closing directions, the valve control accuracy is high, the performance is stable and reliable, the piston rack and pinion mesh with the gear shaft to output a large torque, and provides sufficient power to control the opening and closing of the valve in a compact space. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a side view of the structure of this utility model.

[0018] Figure label:

[0019] 1. Housing; 21. Gear shaft; 22. Bearing housing; 23. Housing cover; 24. Limit switch; 3. Piston rack; 41. Oil cylinder; 42. Sealing cover; 43. Oil circuit; 51. Motor; 52. High-pressure oil pump; 53. Oil tank; 54. Valve block; 6. Signal feedback device. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0021] like Figure 1-2 As shown, the present invention proposes a marine compact integrated electro-hydraulic actuator, including a housing 1, a housing cover 23 installed at the front end of the housing 1, and a bearing seat 22 provided inside the housing 1, and a gear shaft 21 that passes through the housing cover 23 is provided inside the bearing seat 22.

[0022] The hydraulic mechanism includes cylinders 41 located at both ends of the housing 1. The ends of the cylinders 41 are formed with caps 42. The caps 42 are provided with oil passages 43 that connect the oil passages of the housing 1 and the oil chambers of the caps 42. A piston rack 3 that meshes with the gear shaft 21 is movably installed between the two cylinders 41.

[0023] The oil supply mechanism includes a motor 51 installed above the housing 1. The output end of the motor 51 is connected to a high-pressure oil pump 52. The inlet end of the high-pressure oil pump 52 is connected to an oil tank 53, and the outlet end is connected to the left and right oil passages of the housing 1 through a valve block 54.

[0024] It should be noted that the middle part of the piston rack 3 is a rack structure, and the two ends are piston structures. During the movement of the pistons at both ends along the inner cavity of the oil cylinder 41, the piston rack 3 meshes with the gear shaft 21. The rack structure of the piston rack 3 and the two piston structures are designed as a whole. The formed whole can move back and forth in a straight line between the two oil cylinders 41 to mesh with the gear shaft 51.

[0025] In this embodiment, the hydraulic mechanism, oil supply mechanism and housing are integrally cast. The built-in oil circuit and oil passage eliminate the need for cumbersome external pipes. The dual oil cylinder 41 design ensures that the output torque and movement speed of the actuator are consistent in both the opening and closing directions. The valve control accuracy is high and the performance is stable and reliable. The piston rack 3 meshes with the gear shaft 21 to output a large torque, providing sufficient power to control the opening and closing of the valve in a compact space.

[0026] As an example of forward and reverse drive of motor 51: A limit switch 24 is provided on the outer side of gear shaft 21 to cooperate with it. Limit switch 24 is connected to motor 51 via signal feedback device 6. Limit switch 24 is installed on top of gear shaft 21. When gear shaft 21 rotates to the angle of contact with limit switch 24, it indicates that it has moved to the designated position. The signal feedback device 6 feeds back a signal to the motor controller to control motor 51 to rotate forward and reverse for oil supply.

[0027] The cylinders 41 at both ends of the housing 1 have the same structure, and the end caps 42 of both are equipped with oil passages 43 of the same structure. When high-pressure oil enters the oil chamber of the corresponding cylinder 41 from the oil passage 43 on one side, the oil passage 43 on the other side serves as a return oil channel. The hydraulic oil pushes the piston at one end of the piston rack 3, causing it to move to the other side, thereby driving the gear shaft 21 to rotate through the rack in the middle.

[0028] When reverse rotation is required, the oil circuit direction is switched by valve block 54, and high-pressure oil enters the opposite oil cylinder 41 from the oil circuit 43 on the other side, pushing the piston rack 3 to move in the opposite direction, thereby driving the gear shaft 21 to reverse.

[0029] The two oil circuits 43 are interchangeable in function. Depending on the direction of oil supply, they can be switched to either the inlet or return oil circuit at any time, ensuring that the driving force and speed of the valve are the same in both opening and closing actions, resulting in high control precision.

[0030] To facilitate temperature control of motor 51, a temperature sensor is installed on motor 51 to monitor the temperature. When the motor temperature reaches 150 degrees Celsius, the motor stops working to prevent damage to the motor, and when the temperature is below 100 degrees Celsius, the motor starts normally.

[0031] The oil tank 53 is equipped with a viewing window for observing the hydraulic oil level, as well as oil filling and drain ports. The design of the oil filling and drain ports facilitates the replacement of hydraulic oil, saves space, and prevents problems such as oil pipe leakage.

[0032] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A marine compact integrated electro-hydraulic actuator, characterized in that, Includes a housing (1), a cover (23) is installed at the front end of the housing (1), and a bearing seat (22) is provided inside the housing (1). A gear shaft (21) is provided inside the bearing seat (22) and passes through the cover (23). The hydraulic mechanism includes cylinders (41) disposed at both ends of the housing (1). The ends of the cylinders (41) are formed with caps (42). The caps (42) are provided with oil passages (43) that connect the oil passage of the housing (1) and the oil chamber of the caps (42). A piston rack (3) that meshes with the gear shaft (21) is movably installed between the two cylinders (41). The oil supply mechanism includes a motor (51) installed above the housing (1). The output end of the motor (51) is connected to a high-pressure oil pump (52). The inlet end of the high-pressure oil pump (52) is connected to an oil tank (53), and the outlet end is connected to the left and right oil passages of the housing (1) through a valve block (54).

2. The marine compact integrated electro-hydraulic actuator according to claim 1, characterized in that, A limit switch (24) is provided on the outside of the gear shaft (21) to cooperate with it. The limit switch (24) is connected to the motor (51) via a signal feedback device (6).

3. A marine compact integrated electro-hydraulic actuator according to claim 1, characterized in that, The piston rack (3) has a rack structure in the middle and piston structures at both ends. During the movement of the pistons at both ends along the inner cavity of the oil cylinder (41), the piston rack (3) meshes with the gear shaft (21).

4. A marine compact integrated electro-hydraulic actuator according to claim 1, characterized in that, The cylinders (41) at both ends of the housing (1) have the same structure, and the oil passages (43) with the same structure are installed at the cover (42) of both.

5. A marine compact integrated electro-hydraulic actuator according to claim 1, characterized in that, The motor (51) is equipped with a temperature control sensor for monitoring temperature.

6. A marine compact integrated electro-hydraulic actuator according to claim 1, characterized in that, The oil tank (53) is provided with a viewing window, an oil filling port, and an oil drain port.

Images