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CN115596810A - Seawater corrosion resistant propeller gear box and shell maintenance method and manufacturing method thereof - Google Patents

Seawater corrosion resistant propeller gear box and shell maintenance method and manufacturing method thereof Download PDF

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Publication number
CN115596810A
CN115596810A CN202211209879.1A CN202211209879A CN115596810A CN 115596810 A CN115596810 A CN 115596810A CN 202211209879 A CN202211209879 A CN 202211209879A CN 115596810 A CN115596810 A CN 115596810A
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CN
China
Prior art keywords
shell
output
corrosion resistant
side bearing
reinforcing lining
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Withdrawn
Application number
CN202211209879.1A
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Chinese (zh)
Inventor
王有法
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Individual
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Individual
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Priority to CN202211209879.1A priority Critical patent/CN115596810A/en
Publication of CN115596810A publication Critical patent/CN115596810A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
    • F16H1/14—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising conical gears only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/02—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
    • F16H1/125—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising spiral gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/03—Gearboxes; Mounting gearing therein characterised by means for reinforcing gearboxes, e.g. ribs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/031—Gearboxes; Mounting gearing therein characterised by covers or lids for gearboxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/032—Gearboxes; Mounting gearing therein characterised by the materials used
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/038—Gearboxes for accommodating bevel gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/045—Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/048—Type of gearings to be lubricated, cooled or heated
    • F16H57/0493—Gearings with spur or bevel gears
    • F16H57/0495—Gearings with spur or bevel gears with fixed gear ratio
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/02—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing
    • B63H2023/0291—Trolling gears, i.e. mechanical power transmissions comprising controlled slip clutches, e.g. for low speed propulsion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02013—Extension units for gearboxes, e.g. additional units attached to a main gear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02017—Gearboxes; Mounting gearing therein characterised by special features related to the manufacturing of the gear case, e.g. special adaptations for casting

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Manufacturing & Machinery (AREA)
  • General Details Of Gearings (AREA)
  • Gear Transmission (AREA)

Abstract

The marine corrosion resistant propeller gearbox comprises a shell, an input assembly and an output assembly; the shell comprises a shell body, the shell body is provided with an input cavity and an output cavity, the input assembly is arranged in the input cavity, and the output assembly is arranged in the output cavity; the input cavity is internally provided with an A metal reinforcing lining piece, the front end of the A metal reinforcing lining piece is provided with an input side bearing, and a driving bevel gear is assembled on the input side bearing; the output cavity is internally provided with a metal B reinforcing lining member, an output side bearing is arranged in the metal B reinforcing lining member, the output side bearing is assembled with an output shaft, and a driven bevel gear is arranged between the output side bearing and the output shaft; the housing also includes an end cap. The propeller gearbox adopts plastic as a shell, and a metal lining piece is arranged inside the shell to prevent overheating deformation. The invention also provides a maintenance method and a manufacturing method of the shell of the gearbox. The maintenance method of the invention further reduces the use cost. The manufacturing method is easy to implement and is beneficial to controlling the manufacturing cost.

Description

Seawater corrosion resistant propeller gear box and shell maintenance method and manufacturing method thereof
Technical Field
The invention relates to a propeller gear box, in particular to a propeller gear box resistant to seawater corrosion and a maintenance method and a manufacturing method of a shell of the propeller gear box.
Background
In the field of aquaculture, a small ship powered by an externally-hung propeller is often required for operation. The propeller, also known as an outboard engine, is mounted to the hull in an outboard manner during operation, and drives the boat to sail by rotation of the propeller. The externally-hung propeller usually adopts a gear box as a power transmission mechanism, transmits the power of a main shaft to the propeller and drives the propeller to rotate.
In the aquaculture field, the propeller gear box that uses on boats and ships generally adopts the metal material that intensity is higher, the heat dissipation is better as the shell, but the gear box contacts with the sea water for a long time, can appear the problem of sea water corrosion, leads to the gear box to damage. Although the gear box shell made of plastic can effectively resist corrosion of seawater, when the gear box works, a large amount of heat is generated due to high-speed rotation of the internal gear and the gear shaft, so that the gear box shell deforms, and the gear box is invalid and damaged.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a propeller gear box resistant to seawater corrosion. The propeller gearbox adopts seawater corrosion resistant plastics as the gearbox shell, and the metal lining piece is arranged in the plastic shell to prevent overheating deformation, so that the propeller gearbox has high reliability and long service life while meeting the requirement of seawater corrosion resistance, and the manufacturing cost is reduced. The invention also provides a maintenance method and a manufacturing method of the sea water corrosion resistant propeller gearbox shell. The maintenance method of the invention further reduces the use cost. The manufacturing method is easy to implement and is beneficial to controlling the manufacturing cost.
For the gear box, the invention provides the following technical scheme:
the marine corrosion resistant propeller gearbox comprises a shell, an input assembly and an output assembly; the shell comprises a shell body made of plastic materials, an input cavity and an output cavity are arranged in the shell body, the input assembly is arranged in the input cavity, and the output assembly is arranged in the output cavity;
the input cavity is internally provided with an A metal reinforcing lining part which is matched with the cavity in shape and size, the A metal reinforcing lining part is tubular so that a main shaft of the propeller can be inserted, the front end of the A metal reinforcing lining part is provided with an input side bearing, an inner ring of the input side bearing is provided with a drive bevel gear, and the input side bearing and the drive bevel gear form the input assembly;
the output cavity is internally provided with a metal B reinforcing lining piece, an output side bearing is arranged in the metal B reinforcing lining piece, an output shaft is assembled in an inner ring of the output side bearing, a driven bevel gear is arranged between the output side bearing and the output shaft and is meshed with the driving bevel gear, and the output side bearing, the driven bevel gear and the output shaft form the output assembly;
the shell also comprises an end cover made of plastic materials, and the end cover is detachably connected with the shell and is sealed; an end cover bearing is arranged on the end cover, a shaft outlet hole is formed in the end cover, and the output shaft penetrates through the end cover bearing and extends out of the shaft outlet hole; the output shaft and the shaft outlet hole are sealed through a sealing element; the shaft extension end of the output shaft is provided with a mounting structure for mounting a propeller;
and the output shaft is provided with an A step and a B step, the A step is abutted against the driven bevel gear, and the B step is abutted against the end cover bearing.
Compared with the prior art, the seawater corrosion resistant propeller gearbox adopts seawater corrosion resistant plastics as the gearbox shell, and the specific metal lining piece is arranged in the plastic shell to prevent overheating deformation, so that the defects of the prior art that the metal shell is adopted are overcome, the seawater corrosion resistance is met, the reliability is high, the service life is long, and the manufacturing cost is reduced.
As an optimization, in the above-mentioned seawater corrosion resistant propeller gear box, the casing is provided with an oil storage tank, the casing is provided with an exhaust hole, and the exhaust hole is provided with a detachable plug. By adopting the structure, the lubricating oil is convenient to add.
Preferably, in the marine corrosion resistant propeller gearbox, the B metal reinforcing lining element is a tapered ring, and the output side bearing is a tapered roller bearing. By adopting the structure, the driven bevel gear and the output shaft can be effectively supported, and meanwhile, the radial load can be better borne.
Preferably, in the propeller gearbox resistant to seawater corrosion, the output shaft is connected with the driven bevel gear through a spline. By adopting the structure, the output shaft and the driven bevel gear are connected through the spline, so that the connection tightness and reliability are good, the connection coaxiality and guidance quality are good, and the high-speed rotation device is suitable for high-speed rotation.
Preferably, in the above propeller gearbox resistant to seawater corrosion, the shaft extension end of the output shaft is provided with a threaded hole and a spline for transmitting torque. By adopting the structure, the output shaft is connected with the external propeller, so that the output shaft has good tightness and reliability, and has the advantage of easy assembly.
Preferably, in the propeller gearbox resistant to seawater corrosion, the A metal reinforcing lining piece is in a stepped pipe shape. By adopting the structure, the A metal reinforcing lining piece and the plastic shell are axially positioned effectively, and the connection is reliable.
Preferably, in the seawater corrosion resistant propeller gearbox, the casing is provided with a sealing ring mounting groove. By adopting the structure, the sealing ring can be arranged on the sealing ring, and the sealing effect is improved when the sealing ring is connected with the outside.
Preferably, in the above-mentioned seawater corrosion resistant propeller gearbox, the casing is provided with a protective fin for preventing the propeller of the propeller from touching the bottom. By adopting the structure, when the gearbox of the propeller is in bottom contact, the protective fins can contact with an impact object in one step before the propeller, so that the damage to the inside of the gearbox caused by the collision of the propeller is avoided.
For the maintenance method, when the protective fins are arranged, the invention provides the following technical scheme:
the maintenance method of the marine corrosion resistant propeller gearbox shell comprises the steps of cutting the protection fins by a cutter when the protection fins are deformed and/or damaged, then placing the shell into a mold, and repairing the protection fins through injection molding.
In the prior art, when the metal gear box shell is deformed and damaged due to bottom contact or collision in the using process, the metal gear box shell cannot be repaired or the repairing cost is too high, and most of the metal gear box shell is scrapped; the maintenance method of the seawater corrosion resistant propeller gearbox shell aims at the plastic gearbox shell, when the protective fins on the gearbox shell are deformed and/or damaged due to bottom contact or collision in the using process, the damaged parts on the protective fins are cut off, then the shell is placed in a mold, and the protective fins are repaired through injection molding. The method is convenient and fast to operate, can be realized by using the die in the production link, does not need special die sinking, has low repairing cost, reduces the use cost of a user, and lightens the economic burden of the user.
For the manufacturing method, the invention provides the following technical scheme:
the invention relates to a method for manufacturing a shell of a marine corrosion resistant propeller gear box, which comprises the following steps: firstly, machining to obtain a metal reinforcing lining member A and a metal reinforcing lining member B, then obtaining a plastic end cover and a plastic shell containing the metal reinforcing lining member A through an injection molding process, and then pressing the metal reinforcing lining member B into the shell to obtain the composite material.
Compared with the prior art, the manufacturing method of the seawater corrosion resistant propeller gear box shell comprises the steps of firstly manufacturing the metal reinforcing lining piece A and the metal reinforcing lining piece B by machining, then obtaining the end cover made of the plastic material and the shell made of the plastic material and containing the metal reinforcing lining piece A by an injection molding process, and then pressing the metal reinforcing lining piece B into the shell.
Drawings
FIG. 1 is a cross-sectional view of a propeller gearbox of the present invention;
FIG. 2 is a cross-sectional view of the housing of FIG. 1;
FIG. 3 is a schematic view of a portion of the structure of FIG. 1;
FIG. 4 is a schematic view of the output shaft of FIG. 1;
FIG. 5 is a schematic structural view of the end cap of FIG. 1;
FIG. 6 is a schematic view of the structure of the metal reinforcing liner A of FIG. 1;
fig. 7 is a schematic structural view of the housing of fig. 1.
The symbols in the drawings are:
1-shell, 11-shell, 111-oil storage tank, 112-sealing ring installation groove, 113-protective fin, 12-A metal reinforcing lining piece, 13-B metal reinforcing lining piece, 14-end cover, 141-end cover bearing, 142-shaft outlet hole, 15-exhaust hole and 16-plug; 2-input assembly, 21-input side bearing, 22-drive bevel gear; 3-output assembly, 31-output side bearing, 32-driven bevel gear, 33-output shaft, 331-A step, 332-B step, 333-threaded hole.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention. In the following examples, those not described in detail are conventional means or common technical knowledge in the art.
Example (see fig. 1-7):
the marine corrosion resistant propeller gear box comprises a shell 1, an input assembly 2 and an output assembly 3; the shell 1 comprises a shell 11 made of plastic materials, an input cavity and an output cavity are arranged in the shell 11, the input assembly 2 is arranged in the input cavity, and the output assembly 3 is arranged in the output cavity; the input cavity is internally provided with an A metal reinforcing lining part 12 which is matched with the cavity in shape and size, the A metal reinforcing lining part 12 is tubular so that a main shaft of a propeller can be inserted, the front end of the A metal reinforcing lining part 12 is provided with an input side bearing 21, a driving bevel gear 22 is assembled on the inner ring of the input side bearing 21, and the input side bearing 21 and the driving bevel gear 22 form the input assembly 2; a B metal reinforcing lining piece 13 is arranged in the output cavity, an output side bearing 31 is arranged in the B metal reinforcing lining piece 13, an output shaft 33 is assembled in an inner ring of the output side bearing 31, a driven bevel gear 32 is arranged between the output side bearing 31 and the output shaft 33, the driven bevel gear 32 is meshed with the drive bevel gear 22, and the output side bearing 31, the driven bevel gear 32 and the output shaft 33 form the output component 3; the shell 1 further comprises an end cover 14 made of plastic, and the end cover 14 is detachably connected with the shell 11 and is sealed; an end cover bearing 141 is arranged on the end cover 14, a shaft outlet hole 142 is arranged on the end cover 14, and the output shaft 33 penetrates through the end cover bearing 141 and extends out of the shaft outlet hole 142; the output shaft 33 and the shaft outlet 142 are sealed through a sealing element; the shaft extension end of the output shaft 33 is provided with a mounting structure for mounting a propeller; the output shaft 33 is provided with an A step 331 and a B step 332, the A step 331 abuts against the driven bevel gear 32, and the B step 332 abuts against the end cover bearing 141.
In this embodiment, an oil storage tank 111 is arranged on the housing 11, an exhaust hole 15 is arranged on the housing 11, and a detachable plug 16 is arranged on the exhaust hole 15. The plug 16 can be connected with the exhaust hole 15 through threads, and the threaded connection is universal in disassembly mode and convenient to operate.
In this embodiment, the B metal reinforcing liner 13 is a tapered ring, and the output side bearing 31 is a tapered roller bearing. When the shaft is mounted, the a step 331 on the output shaft 33 is pressed against the driven bevel gear 32 on the output side bearing 31, and therefore the output side bearing 31 receives an axial load; in the use state, the output side bearing 31 receives a radial load due to the action of gravity; and the tapered roller bearing can bear combined radial and axial loads which are mainly radial.
In this embodiment, the output shaft 33 is splined to the driven bevel gear 32. The spline connection mode has good guidance quality and can better transmit torque.
In this embodiment, the shaft extension end of the output shaft 33 is provided with a threaded hole 333 and a spline for transmitting torque. Propellers on the market are mostly provided with splines and threaded hole structures, so that the output shaft 33 is provided with the splines and the threaded hole structures, and the universality is good.
In this embodiment, the a metal reinforcing liner 12 is in the shape of a stepped tube.
In this embodiment, a seal ring installation groove 112 is formed on the housing 11. The housing 11 is provided with a packing installation groove 112 in which a packing can be installed, thereby improving a sealing effect when being connected to the outside.
In this embodiment, the housing 11 is provided with a protection fin 113 for preventing the propeller of the propeller from touching the bottom.
In the method for maintaining the shell of the seawater corrosion resistant propeller gearbox in the embodiment, when the protective fins 113 deform and/or are damaged, the protective fins 113 are cut off by a cutter, then the shell 11 is placed in a mold, and the protective fins 113 are repaired by injection molding.
The method for manufacturing the marine corrosion resistant propeller gearbox shell in the embodiment comprises the steps of firstly manufacturing an A metal reinforcing lining part 12 and a B metal reinforcing lining part 13 by machining, then obtaining a plastic end cover 14 and a plastic shell 11 containing the A metal reinforcing lining part 12 by an injection molding process, and then pressing the B metal reinforcing lining part 13 into the shell 11 to obtain the marine corrosion resistant propeller gearbox shell.
When the marine corrosion resistant propeller gearbox of the above embodiment is installed, the output side bearing 31 is placed on the B metal reinforcing liner 13; mounting the input side bearing 21 on the a metal reinforcing liner 12, and mounting the drive bevel gear 22 on the inner ring of the input side bearing 21; placing the driven bevel gear 32 on the output side bearing 31 and engaging with the drive bevel gear 22; inserting the output shaft 33 into the driven bevel gear 32 and the output side bearing 31, and abutting the a step 331 against the driven bevel gear 32; the end bearing 141 is attached to the end cap 14, and the end cap 14 is attached to the housing 11 so that the end bearing 141 abuts against the B step 332.
In a use state, the shell 11 of the propeller gearbox is connected with the propeller main shaft supporting pipe, the propeller main shaft is inserted into an input cavity of the shell 11 and is in transmission connection (generally, a spline) with the driving bevel gear 22, and the shaft extension end of the output shaft 33 is provided with a propeller. When the propeller works, the main shaft of the propeller transmits power to the propeller through the gear box to drive the ship to sail.
The above general description of the invention and the description of the specific embodiments thereof, as referred to in this application, should not be construed as limiting the technical solutions of the invention. Those skilled in the art can add, reduce or combine the technical features disclosed in the general description and/or the specific embodiments (including the examples) to form other technical solutions within the protection scope of the present application according to the disclosure of the present application without departing from the structural elements of the present invention.

Claims (10)

1. The marine corrosion resistant propeller gearbox comprises a shell (1), an input assembly (2) and an output assembly (3); the method is characterized in that: the shell (1) comprises a shell (11) made of a plastic material, an input cavity and an output cavity are arranged in the shell (11), the input assembly (2) is arranged in the input cavity, and the output assembly (3) is arranged in the output cavity;
the input cavity is internally provided with an A metal reinforcing lining part (12) which is matched with the cavity in shape and size, the A metal reinforcing lining part (12) is tubular so that a main shaft of the propeller can be inserted, the front end of the A metal reinforcing lining part (12) is provided with an input side bearing (21), the inner ring of the input side bearing (21) is provided with a driving bevel gear (22), and the input side bearing (21) and the driving bevel gear (22) form the input assembly (2);
a metal B reinforcing lining piece (13) is arranged in the output cavity, an output side bearing (31) is arranged in the metal B reinforcing lining piece (13), an output shaft (33) is assembled in an inner ring of the output side bearing (31), a driven bevel gear (32) is arranged between the output side bearing (31) and the output shaft (33), the driven bevel gear (32) is meshed with the driving bevel gear (22), and the output side bearing (31), the driven bevel gear (32) and the output shaft (33) form the output assembly (3);
the shell (1) further comprises an end cover (14) made of plastic, and the end cover (14) is detachably connected with the shell (11) and is sealed; an end cover bearing (141) is arranged on the end cover (14), a shaft outlet hole (142) is formed in the end cover (14), and the output shaft (33) penetrates through the end cover bearing (141) and extends out of the shaft outlet hole (142); the output shaft (33) and the shaft outlet hole (142) are sealed through a sealing piece; the shaft extension end of the output shaft (33) is provided with a mounting structure for mounting a propeller;
the output shaft (33) is provided with an A step (331) and a B step (332), the A step (331) is abutted against the driven bevel gear (32), and the B step (332) is abutted against the end cover bearing (141).
2. The seawater corrosion resistant propeller gearbox of claim 1, wherein: be equipped with oil storage tank (111) on casing (11), be equipped with exhaust hole (15) on casing (11), be equipped with detachable end cap (16) on exhaust hole (15).
3. The seawater corrosion resistant propeller gearbox of claim 1, wherein: the B metal reinforcing lining piece (13) is in a conical ring shape, and the output side bearing (31) is a tapered roller bearing.
4. The seawater corrosion resistant propeller gearbox of claim 1, wherein: the output shaft (33) is connected with the driven bevel gear (32) through a spline.
5. The seawater corrosion resistant propeller gearbox of claim 1, wherein: and a shaft extending end of the output shaft (33) is provided with a threaded hole (333) and a spline for transmitting torque.
6. The seawater corrosion resistant propeller gearbox of claim 1, wherein: the A metal reinforcing lining piece (12) is in a stepped tube shape.
7. The seawater corrosion resistant propeller gearbox of claim 1, wherein: and a sealing ring mounting groove (112) is formed in the shell (11).
8. The seawater corrosion resistant propeller gearbox of claim 1, wherein: and a protective fin (113) for preventing the propeller of the propeller from touching the bottom is arranged on the shell (11).
9. A method of maintaining a marine corrosion resistant propeller gearbox housing according to claim 8, characterised in that: when the protective fins (113) deform and/or are damaged, the protective fins (113) are cut off by a cutter, then the shell (11) is placed in a mold, and the protective fins (113) are repaired through injection molding.
10. A method of manufacturing a marine corrosion resistant propeller gearbox housing according to claim 1, characterised in that: the method comprises the steps of firstly, manufacturing an A metal reinforcing lining piece (12) and a B metal reinforcing lining piece (13) by machining, then obtaining a plastic end cover (14) and a plastic shell (11) containing the A metal reinforcing lining piece (12) by an injection molding process, and then pressing the B metal reinforcing lining piece (13) into the shell (11) to obtain the composite material.
CN202211209879.1A 2022-09-30 2022-09-30 Seawater corrosion resistant propeller gear box and shell maintenance method and manufacturing method thereof Withdrawn CN115596810A (en)

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Application publication date: 20230113