Electric actuating mechanism for naval vessel

Abstract

The utility model relates to an electric actuating mechanism for a naval vessel. The device comprises a machine shell, a worm gear, a worm shaft, an electric control assembly, a direct current motor and a hand wheel assembly, a manual input section, an electric input section and a worm section are arranged on the worm shaft, an installation cavity is formed between the manual input section and the machine shell, a rotating fluted disc is coaxially fixed to the manual input section, and a sliding fluted disc is arranged on the inner wall of the installation cavity in a sliding fit mode. The sliding fluted disc is restrained to only move in the axial direction, first crown teeth are arranged on the rotating fluted disc, second crown teeth are arranged on the sliding fluted disc, an elastic piece capable of driving the sliding fluted disc and the rotating fluted disc to be separated from each other is connected between the sliding fluted disc and the rotating fluted disc, and an electromagnet assembly is further arranged in the mounting cavity and controlled by an electric control assembly. The electromagnetic control module is additionally arranged on the basis of an existing electric actuating mechanism, the situation that the worm shaft is driven by the hand wheel assembly to rotate due to unforeseen circumstances is avoided, and the electric actuating mechanism has a reliable operation effect.

Description

Technical Field

[0001] The utility model relates to an electric actuator, in particular to an electric actuator for ships. Background Art

[0002] The electric actuator for valves is an electric device, generally including a casing, a worm gear, a worm shaft, an electric control component, a DC motor and a handwheel assembly. It receives a control signal given by a control center to control the operation of the electric control component, and then realizes the output of power by the worm wheel shaft. The worm wheel shaft is used to control the opening and closing of the valve and can precisely control and adjust the valve. The following are the characteristics of the electric actuator for valves: safe and reliable, the electric actuator can work under harsh environmental conditions, such as high temperature, low temperature, strong corrosion and other environments, to ensure the stability and sealing performance of the valve; easy to operate, the electric actuator can be remotely controlled through a remote controller or an automation system, or manually operated on site, and the operation is very simple; intelligent control, modern electric actuators adopt intelligent control circuits, which can realize self-diagnosis and adjustment, and display the working state in Chinese on a liquid crystal display, with the advantages of strong applicability, complete functions and precise control; enhanced performance, the actuator is not limited to simple on-off functions, but also includes a position sensing device, a torque sensing device, an electrode protection device, a logic control device, a digital communication module and a PID control module, etc., enhancing the working safety performance and environmental protection performance.

[0003] The handwheel assembly on the electric actuator is a device for manually controlling the rotation of the worm shaft to cope with some special situations. Since the transmission mechanism of the worm and worm gear has a self-locking effect, a locking mechanism is generally set on the handwheel assembly to prevent the handwheel assembly from generating non-artificial deflection. The locking effect of the conventional handwheel assembly is sufficient to cope with conventional valve applications. However, the valves on ships need to cope with the bumps at sea, especially on warships, where the bumps are more severe. Therefore, more stringent requirements are put forward for the self-locking requirements of the actuator, and the locking effect of the conventional handwheel assembly cannot guarantee reliability. Summary of the Invention

[0004] The utility model provides an electric actuator for ships, which solves the problem that the self-locking effect of the existing conventional actuator cannot cope with the working conditions on ships.

[0005] The above technical problems of the utility model are mainly solved by the following technical solutions: an electric actuator for ships, comprising a casing, a worm wheel, a worm shaft, an electronic control component, a DC motor and a handwheel component, the worm shaft is provided with a manual input section drivingly connected to the handwheel component, the worm shaft is provided with an electric input section drivingly connected to the DC motor, the middle part of the worm shaft is provided with a worm section meshing with the worm wheel, characterized in that: an annular installation cavity is formed between the manual input section and the casing, the inner wall profile of the installation cavity is coaxial with the worm shaft, a rotating gear disc is coaxially fixed to the manual input section, and a sliding gear is slidably matched on the inner wall of the installation cavity The sliding toothed disc is constrained to be movable only in the axial direction, the rotating toothed disc is provided with a first crown tooth, the sliding toothed disc is provided with a second crown tooth, an elastic member that can drive the sliding toothed disc and the rotating toothed disc to separate from each other is connected, an electromagnet assembly is also provided in the installation cavity, and the electromagnet assembly is controlled by the electric control assembly; when the electromagnet assembly is energized, the magnetic force generated by it can drive the sliding toothed disc to approach one side of the rotating toothed disc until it abuts against the rotating toothed disc, at which time the elastic member is in a compressed state, and the first crown tooth and the second crown tooth are meshed with each other; when the electromagnet assembly is powered off, the elastic member resets and pushes the sliding toothed disc to separate from the rotating toothed disc.

[0006] When the utility model is in a normal state, the electromagnet assembly is always in a state of being powered by the electric control assembly, and the magnetic force generated by the electromagnet assembly can maintain the state in which the sliding toothed disc and the rotating toothed disc are in contact with each other, and the first crown tooth and the second crown tooth are meshed with each other. Since the sliding toothed disc cannot rotate relative to the housing, the rotating toothed disc cannot rotate relatively either, thereby achieving a self-locking effect of the worm shaft; when the handwheel assembly or the DC motor needs to rotate and control the worm shaft, the power supply state of the electromagnet assembly can be cut off by a physical button (switch) or wireless control, so that the electromagnet assembly loses its magnetic force, and the elastic member can drive the sliding toothed disc to separate from the rotating toothed disc, and at this time the rotating toothed disc loses its circumferential constraint and can rotate freely.

[0007] Therefore, compared with the prior art, the utility model has the following characteristics: 1. The utility model adds an electromagnetic control module on the basis of the existing electric actuator to prevent the worm shaft from being driven to rotate by the handwheel assembly due to unexpected situations, has a reliable operating effect, and does not require major changes to the original structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Attached Figure 1 It is a partial structural schematic diagram of the utility model;

[0009] Attached Figure 2 Yes Figure 1 A magnified view of part A;

[0010] AttachedFigure 3 It is the assembly drawing of the sliding gear disc and the inner wall of the mounting cavity. DETAILED DESCRIPTION

[0011] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0012] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0013] Example 1: See Figure 1 , Figure 2 and Figure 3 A ship electric actuator includes a housing 100, a worm gear, a worm shaft 200, an electric control assembly, a DC motor and a handwheel assembly 300. The worm gear, the electric control assembly, the handwheel assembly and the DC motor are all prior art, and their specific structures and the connection relationship between them are not repeated here. The worm shaft is provided with a manual input section 210 connected to the handwheel assembly, the worm shaft is provided with an electric input section 220 connected to the DC motor, and the middle part of the worm shaft is provided with a worm section 230 meshing with the worm gear. An annular mounting cavity 110 is formed between the manual input section and the housing, and the inner wall contour of the mounting cavity is coaxial with the worm shaft. A rotating gear disc 10 is coaxially fixed to the manual input section, and a sliding gear disc 10 is provided on the inner wall of the mounting cavity. It is matched with a sliding toothed disc 20, and a plurality of guide strips 111 are provided on the inner wall of the installation cavity, and a guide groove 21 is correspondingly provided on the outer wall of the sliding toothed disc, a first crown tooth 11 is provided on the rotating toothed disc, and a second crown tooth 22 is provided on the sliding toothed disc. An elastic member 30 that can drive the sliding toothed disc and the rotating toothed disc to separate from each other is connected between the sliding toothed disc and the rotating toothed disc. An electromagnet assembly 40 is also provided in the installation cavity, and the electromagnet assembly is controlled by an electric control assembly; when the electromagnet assembly is energized, the magnetic force generated by it can drive the sliding toothed disc to approach one side of the rotating toothed disc until it abuts against the rotating toothed disc. At this time, the elastic member is in a compressed state, and the first crown tooth and the second crown tooth are meshed with each other; when the electromagnet assembly is powered off, the elastic member resets and pushes the sliding toothed disc to separate from the rotating toothed disc.

[0014] When this embodiment is in the normal state, the electromagnet assembly is always powered by the electronic control assembly. The magnetic force generated by it can maintain the state where the sliding gear disk and the rotating gear disk are in mutual contact. The first crown gear and the second crown gear are meshed with each other. Since the sliding gear disk cannot rotate relative to the machine housing, the rotating gear disk cannot rotate either, achieving the self-locking effect of the worm shaft. When the handwheel assembly or the DC motor needs to rotate and control the worm shaft, the power supply state of the electromagnet assembly can be cut off by means of a physical button (switch) or wireless control, so that the electromagnet assembly loses its magnetic force. In this way, the elastic member can drive the sliding gear disk and the rotating gear disk to separate from each other. At this time, the rotating gear disk loses the circumferential constraint and can rotate freely.

[0015] See Figure 2 , the sliding gear disk is arranged relatively outside the rotating gear disk. An annular permanent magnet 23 is provided on the outer side of the sliding gear disk. The electromagnet assembly is located on one side of the annular permanent magnet. When the electromagnet assembly is energized, the magnetic force generated by it repels the annular permanent magnet.

[0016] See Figure 2 , an annular positioning seat 41 is also fixedly sleeved on the inner wall of the installation cavity. The electromagnet assembly is fixed on the annular positioning seat.

[0017] See Figure 1 and Figure 2 , a first oil seal 211 and a first bearing 212 are sleeved on the manual input section. The first oil seal is used for airtight separation between the installation cavity and the worm section. A second oil seal 221 and a second bearing 222 are sleeved on the electric input section. The second oil seal is used for airtight separation between the electronic control assembly and the worm section. A retaining ring 223 is also provided between the second oil seal and the second bearing.

[0018] It will be obvious to those skilled in the art that the present utility model can be changed into various ways. Such changes are not considered to depart from the scope of the present utility model. All such modifications obvious to those skilled in the art will be included within the scope of the present claims.

Claims

1. An electric actuator for a ship, comprising a housing, a worm wheel, a worm shaft, an electronic control assembly, a DC motor and a handwheel assembly, wherein the worm shaft is provided with a manual input section drivingly connected to the handwheel assembly, the worm shaft is provided with an electric input section drivingly connected to the DC motor, and the middle portion of the worm shaft is provided with a worm section meshing with the worm wheel, characterized in that: An annular installation cavity is formed between the manual input section and the casing, the inner wall contour of the installation cavity is coaxial with the worm shaft, a rotating toothed disc is coaxially fixed on the manual input section, a sliding toothed disc is slidably matched on the inner wall of the installation cavity, the sliding toothed disc is constrained to be movable only in the axial direction, a first crown tooth is provided on the rotating toothed disc, a second crown tooth is provided on the sliding toothed disc, an elastic member that can drive the sliding toothed disc and the rotating toothed disc to separate from each other is connected, an electromagnet assembly is also provided in the installation cavity, and the electromagnet assembly is controlled by the electric control assembly; when the electromagnet assembly is energized, the magnetic force generated by it can drive the sliding toothed disc to approach one side of the rotating toothed disc until it abuts against the rotating toothed disc, at which time the elastic member is in a compressed state, and the first crown tooth and the second crown tooth are meshed with each other; when the electromagnet assembly is powered off, the elastic member resets and pushes the sliding toothed disc to separate from the rotating toothed disc.

2. The electric actuator for a ship according to claim 1, characterized in that: The sliding toothed disc is arranged on the outside relative to the rotating toothed disc, and an annular permanent magnet is arranged on the outer side of the sliding toothed disc. The electromagnet assembly is located on one side of the annular permanent magnet. When the electromagnet assembly is energized, the magnetic force it generates repels the annular permanent magnet.

3. The electric actuator for a ship according to claim 2, characterized in that: A plurality of guide strips are arranged on the inner wall of the installation cavity, and a guide groove is correspondingly arranged on the outer wall of the sliding toothed disc.

4. The electric actuator for a ship according to claim 3, characterized in that: An annular positioning seat is fixedly sleeved on the inner wall of the installation cavity, and the electromagnet assembly is fixed on the annular positioning seat.

5. The electric actuator for a ship according to claim 1, characterized in that: The manual input section is sleeved with a first oil seal and a first bearing, the first oil seal is used to air-tightly separate the installation cavity and the worm section, the electric input section is sleeved with a second oil seal and a second bearing, the second oil seal is used to air-tightly separate the electronic control component and the worm section, and a retaining ring is also provided between the second oil seal and the second bearing.

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