CN118274036A - Safety protection method for coupling of marine full-rotation propulsion device - Google Patents

Abstract

The embodiment of the invention provides a safety protection coupler of a marine full-rotation propulsion device, which comprises an elastic coupler, a middle floating shaft and a gear coupler which are coaxially arranged; the elastic coupling comprises a brake disc, a spherical bearing, a flange shaft and a rubber support piece which are coaxially arranged; the spherical bearing is used for being fixedly connected with a propulsion motor shaft hub, the flange shaft is fixedly connected with the side of the brake disc corresponding to the propulsion motor shaft hub and is correspondingly connected with the spherical bearing, and the rubber support piece is arranged between the propulsion motor shaft hub and the brake disc. When unexpected rubber support piece fracture occurs, other components in the coupler can be decelerated along with the continuous radial rotation of inertia, so that the safety protection function is achieved, the rubber element can be replaced after the rubber element is stopped, and the normal operation can be achieved. The method meets the requirements of axial, radial and angular displacement generated by vibration when the full-rotation propulsion device operates.

Description

Safety protection method for coupling of marine full-rotation propulsion device

Technical Field

The application relates to the technical field of ship turbine design, in particular to a safety protection method for a coupling of a ship full-rotation propulsion device.

Background

The full-rotation propulsion device comprises the following components: propulsion motor (propulsion motor output shaft), propulsion motor base, shaft coupling rudder propeller module (propeller input shaft) and main propulsion base. The purpose of using elastic couplings in marine power systems is to transfer power and torque, compensating for axial, radial, and angular centering errors.

The propulsion motor in the full-rotation propulsion device is vertically installed, the gravity center of the propulsion motor is higher, the output shaft of the propulsion motor (for example, more than 200 r/m) running at high speed is connected with the input shaft of the propeller through an elastic (for example, rubber element) coupling, the vibration of the propulsion motor is large, certain rigidity is achieved, stress concentration is formed, fatigue can be caused for a long time, when the rubber element breaks accidentally, components such as a lower pipe and a half shell of the coupling can be caused to impact the shafting and the full-rotation propulsion device to be damaged, serious potential safety hazards exist, and economic losses are caused.

Disclosure of Invention

The invention aims to solve the problems of safety protection during the operation of the coupling of the full-rotation propulsion device, avoiding secondary damage to the shafting and the full-rotation propulsion device, ensuring the safe operation of equipment and prolonging the service life of the full-rotation propulsion device.

The embodiment of the invention provides a safety protection coupler of a marine full-rotation propulsion device, which comprises an elastic coupler, a middle floating shaft and a gear coupler which are coaxially arranged;

The elastic coupling comprises a brake disc, a spherical bearing, a flange shaft and a rubber support piece which are coaxially arranged;

The spherical bearing is used for being fixedly connected with a propulsion motor shaft hub, the flange shaft is fixedly connected with the brake disc corresponding to the propulsion motor shaft hub side and is correspondingly connected with the spherical bearing, and the rubber support piece is arranged between the propulsion motor shaft hub and the brake disc;

The intermediate floating shaft comprises a tube shaft and an adapter arranged at the bottom end of the tube shaft, and one end of the tube shaft is connected with the brake disc;

The gear coupling comprises a gear hub and a half shell, wherein the half shell is sleeved outside the gear hub and is used for connecting the other end of the tube shaft, the adapter is connected with the center of the gear hub, and the tooth surface of the gear hub is used for connecting a slurry shaft side hub.

In some embodiments, the rubber support is annular.

In some embodiments, the rubber support comprises two symmetrical semi-circular rubber elements.

In some embodiments, the half shell inner tooth length is greater than the propeller shaft side hub outer tooth length.

In some embodiments, the adapter connects the gear hub center, comprising:

The adapter is pressed down on the gear wheel face of the gear wheel hub.

In some embodiments, the adapter is tapered.

The beneficial effects of the above embodiment of the invention include:

When unexpected rubber support piece fracture occurs, other components in the coupler can be decelerated along with the continuous radial rotation of inertia, so that the safety protection function is achieved, the rubber element can be replaced after the rubber element is stopped, and the normal operation can be achieved. The method meets the requirements of axial, radial and angular displacement generated by vibration when the full-rotation propulsion device operates.

Drawings

The drawings illustrate generally, by way of example and not by way of limitation, various embodiments discussed herein.

FIG. 1 is an oblique view of a marine full-swing propulsion apparatus safety shield coupling;

FIG. 2 is a top view of a marine full-swing propulsion apparatus safety shield coupling;

FIG. 3 is a schematic view of a cross-sectional structure of a safety protection coupling F-F corresponding to the marine full-rotation propulsion apparatus of FIG. 2;

FIG. 4 is a schematic view of a cross-sectional structure of a safety protection coupling B-B corresponding to the marine full-rotation propulsion apparatus of FIG. 2;

FIG. 5 is a full view of the full swing propulsion apparatus;

FIG. 6 is a schematic view of the total length deviation ΔKA+ -10 mm of the coupling assembly;

Fig. 7 is a schematic view of the radial deviation Δkr= ±0.652mm of the propulsion motor shaft from the propeller shaft;

FIG. 8 is a schematic diagram of the angles of the propulsion motor shaft, the paddle shaft and the theoretical center line being equal to or less than 0.03 DEG and equal to or less than 0.1 DEG respectively;

FIG. 9 is a schematic illustration of a coupling assembly;

FIG. 10 is a schematic illustration of the connection of the elastic coupling to the hub;

FIG. 11 is a schematic view of a gear coupling;

FIG. 12 is a schematic view of a spherical coupling;

FIG. 13 is a schematic view of a spherical bearing installation;

Fig. 14 is a schematic cross-sectional view of a spherical coupling.

Detailed Description

For a more complete understanding of the nature and the technical content of the embodiments of the present application, reference should be made to the following detailed description of embodiments of the application, taken in conjunction with the accompanying drawings, which are meant to be illustrative only and not limiting of the embodiments of the application.

In describing embodiments of the present application, unless otherwise indicated and limited thereto, the term "connected" should be construed broadly, for example, it may be an electrical connection, or may be a communication between two elements, or may be a direct connection, or may be an indirect connection via an intermediate medium, and it will be understood by those skilled in the art that the specific meaning of the term may be interpreted according to circumstances.

It should be noted that, the term "first\second\third" related to the embodiment of the present application is merely to distinguish similar objects, and does not represent a specific order for the objects, it is to be understood that "first\second\third" may interchange a specific order or sequence where allowed. It is to be understood that the "first\second\third" distinguishing objects may be interchanged where appropriate such that embodiments of the application described herein may be practiced in sequences other than those illustrated or described herein.

In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

The embodiment of the invention provides a safety protection coupler of a marine full-rotation propulsion device, as shown in fig. 1, a coupler 10 comprises an elastic coupler 11, a middle floating shaft 21 and a gear coupler 31 which are coaxially arranged.

The upper view of the coupling 10 is shown in fig. 2, and the structure of the coupling 10 will be described in detail with reference to fig. 3 and 4 for convenience of explanation.

The elastic coupling 11 comprises a coaxially arranged brake disc 12, a spherical bearing 13, a flange shaft 14 and a rubber support 15.

The spherical bearing 13 is used for being fixedly connected with the propulsion motor shaft hub 91, the flange shaft 14 is fixedly connected with the side of the brake disc 12 corresponding to the propulsion motor shaft hub 91 and is correspondingly connected with the spherical bearing 13, and the rubber support 15 is arranged between the propulsion motor shaft hub 91 and the brake disc 12.

The middle float 21 moving shaft comprises a tube shaft 22 and an adapter 23 arranged at the bottom end of the tube shaft 22, and one end of the tube shaft 22 is connected with the brake disc 12.

The gear coupling 31 comprises a gear hub 33 and a half shell 32, the half shell 32 is sleeved outside the gear hub 33 and used for being connected with the other end of the pipe shaft 22, the adapter 23 is connected with the center of the gear hub 33, and the tooth surface of the gear hub 33 is used for being connected with the pulp shaft side hub 92.

In some embodiments, gear hub 33 is a pulp-side hub 92 and gear coupling 31 includes only half-shell 32, half-shell 32 cooperating with pulp-side hub 92 to form gear coupling 31.

In some embodiments, the rubber support 15 is annular.

In some embodiments, the rubber support 15 comprises two symmetrical semi-circular rubber elements.

In some embodiments, the inner tooth length of the half shell 32 is greater than the outer tooth length of the slurry side hub 92.

In some embodiments, the adapter 23 connects the hub gear 33 center, including:

the adapter 23 is pressed down on the gear wheel face of the gear wheel hub 33.

In some embodiments, the adapter 23 is tapered downward.

When unexpected rubber support piece fracture occurs, other components in the coupler can be decelerated along with the continuous radial rotation of inertia, so that the safety protection function is achieved, the rubber element can be replaced after the rubber element is stopped, and the normal operation can be achieved. The method meets the requirements of axial, radial and angular displacement generated by vibration when the full-rotation propulsion device operates.

In another embodiment of the present invention, a safety protection coupling for a marine full-rotation propulsion apparatus includes:

The full-rotation propulsion device is powered by a 3-phase propulsion motor (rated rotation speed 600 r/m), the motor is matched with a frequency converter for use, a propeller can be driven clockwise and anticlockwise, and the vertically installed propulsion motor is connected with a rudder propeller module through a coupler with an elastic rubber element and a floating shaft tube, as shown in fig. 5.

The centering data of the coupling of a ship full-rotation propulsion device is as follows: the total length L=1646+ -10 mm of the coupling sleeve assembly is shown in FIG. 6; the radial deviation delta KR of the output shaft of the propulsion motor and the input shaft of the main propeller is less than or equal to 0.652mm, as shown in figure 7; the included angle between the output shaft of the propulsion motor and the theoretical center line is less than or equal to 0.03 degrees, and the included angle between the input shaft of the rudder propeller module and the theoretical center line is less than or equal to 0.1 degrees as shown in fig. 8, so that the coupler has the following characteristics: the axial displacement capability is strong, and the bolts can axially slide in the hub and can be independently adjusted; high radial elasticity; proper angular elasticity.

The coupling 10 assembly is constructed as shown in fig. 9: an elastic coupling 11, a floating intermediate shaft 21 and a half shell 32.

The upper section elastic coupling of the coupling is axially and slidably connected with the side hub of the propulsion motor through screws and a sleeve, as shown in fig. 10, and a sliding amount of 55+/-2 mm is reserved after connection.

The lower half shell of the coupling is connected with the hub of the propeller shaft side through a gear coupling, as shown in fig. 11, the length of the internal teeth of the half shell 32 is larger than the length of the external teeth of the hub 92 of the propeller shaft side, meanwhile, an adapter 23 is arranged on the lower end surface of the shaft tube, as shown in fig. 9, and is pressed down on the gear disc surface of the hub 92 of the propeller shaft side, as shown in fig. 11, so that the contact between the lower end surface of the coupling and the hub 92 of the propeller shaft side becomes point contact, and the adapter 23 is in a lower cone shape and has a height of 52mm.

When the full-rotation propulsion device runs at a high speed, the coupling is used for connecting the propulsion motor and the rudder propeller module, so that power and torque are transmitted, axial, radial and angular centering errors are compensated, when accidents happen, when the rubber supporting piece 15 in the elastic coupling 11 breaks, components such as a lower pipe and a half shell of the coupling are caused to impact the shafting and the full-rotation propulsion device to damage, and serious potential safety hazards exist. For this purpose, a spherical coupling Q is added to the design of the elastic coupling 11 and the hub 91 on the side of the propulsion motor shaft, as shown in fig. 12 and 14, the spherical coupling Q can freely move along the axial direction, the radial direction and the angular direction of the coupling, and is not hindered, when the rubber support 15 on the outer ring of the elastic coupling 11 breaks, other components in the coupling can also decelerate along with the continuous radial rotation of inertia, so as to ensure that the components are not damaged, and after stopping, the components can be replaced to restore normal operation, which comprises:

The spherical coupling Q is composed of a spherical bearing 13 and a flange shaft 14, the spherical bearing 13 is fixed to the inner ring of the propulsion motor side hub 91 by screw mounting, and as shown in fig. 13, the spherical bearing 13 can freely rotate in the radial direction.

The flange shaft 14 is fixed to the brake disc 12 of the elastic coupling 11 by screw mounting.

The technical schemes described in the embodiments of the present application may be arbitrarily combined without any collision.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (6)

1. The safety protection coupler of the marine full-rotation propulsion device is characterized by comprising an elastic coupler, a middle floating shaft and a gear coupler which are coaxially arranged;

The elastic coupling comprises a brake disc, a spherical bearing, a flange shaft and a rubber support piece which are coaxially arranged;

The spherical bearing is used for being fixedly connected with a propulsion motor shaft hub, the flange shaft is fixedly connected with the brake disc corresponding to the propulsion motor shaft hub side and is correspondingly connected with the spherical bearing, and the rubber support piece is arranged between the propulsion motor shaft hub and the brake disc;

The intermediate floating shaft comprises a tube shaft and an adapter arranged at the bottom end of the tube shaft, and one end of the tube shaft is connected with the brake disc;

The gear coupling comprises a gear hub and a half shell, wherein the half shell is sleeved outside the gear hub and is used for connecting the other end of the tube shaft, the adapter is connected with the center of the gear hub, and the tooth surface of the gear hub is used for connecting a slurry shaft side hub.

2. The marine full-swing propulsion apparatus safety protection coupling of claim 1, wherein the rubber support is annular.

3. The marine full-swing propulsion device safety shield coupling of claim 2 wherein the rubber support comprises two symmetrical semi-circular rubber elements.

4. The marine full-swing propulsion device safety shield coupling of claim 1 wherein the half shell inner tooth length is greater than the propeller shaft side hub outer tooth length.

5. The marine full-swing propulsion device safety shield coupling of claim 1 wherein the adapter connects the gear hub center comprising:

The adapter is pressed down on the gear wheel face of the gear wheel hub.

6. The marine full-swing propulsion device safety shield coupling of claim 1 wherein the adapter is tapered down.