Marine rudder propeller gearbox

Abstract

The utility model discloses a marine rudder propeller gear box which comprises a shell, a gear box body and a gear box body. The power shaft is rotationally inserted into the shell; the elastic piston piece reciprocates in the cavity I and reciprocates in the cavity II, the fixed cylinder is arranged at the bottom of the shell, the fixed cylinder is integrally formed at the bottom of the shell, and a partition plate for dividing a cavity of the fixed cylinder into a cavity I and a cavity II is fixedly arranged in the fixed cylinder. External fluid is controlled to enter the second cavity through the one-way water inlet channel and is conveyed into the heat exchange pipe, the fluid in the heat exchange pipe can exchange heat with the high-temperature environment in the shell, and the external fluid absorbs heat in the shell, so that the temperature in the shell is reduced, the effect of cooling the gearbox is achieved, and the service life of the gearbox is prolonged. And it is guaranteed that the gearbox can work normally within the proper temperature range.

Description

TECHNICAL FIELD

[0001] The utility model relates to gear box technical field especially relates to marine rudder propeller gear box. BACKGROUND

[0002] Marine gear box plays an important role in the power system of the ship, and the power transmission and speed change are realized through the interaction between gears, the power of prime mover is transmitted to the working machine, and the normal operation of the ship is ensured.

[0003] But the transmission between gears is accompanied by heat generation, and the heat is accumulated in the box body of the gear box, which is difficult to dissipate by itself, and the accumulation of heat will affect the transmission of the gear inside the gear box, and also speed up the wear of the gear, shorten the service life, therefore, a marine rudder propeller gear box is proposed to solve this problem. UTILITY MODEL CONTENTS

[0004] The utility model provides the following technical scheme in view of the deficiency of prior art.

[0005] The marine rudder propeller gear box comprises:

[0006] A shell is provided with a heat exchange pipe inside;

[0007] A power shaft is rotatably inserted into the shell;

[0008] A fixed cylinder is arranged at the bottom of the shell, the bottom of the shell is integrally formed with the fixed cylinder, a partition plate is fixedly arranged in the fixed cylinder to divide the cavity of the fixed cylinder into chamber one and chamber two, the extension direction of the partition plate is perpendicular to the axis of the fixed cylinder, the chamber two is communicated with the water inlet end of the heat exchange pipe, a one-way water inlet channel is arranged at the bottom of the chamber two, a rotating shaft is rotatably connected in the chamber two, the rotating shaft is coaxially connected to the end of the power shaft, an eccentric wheel is fixedly sleeved on the surface of the rotating shaft, an elastic piston piece is movably arranged in the chamber two, one end of the elastic piston piece extends into the chamber one and contacts the outer edge of the eccentric wheel, when an external force drives the power shaft to rotate, the power shaft drives the eccentric wheel to rotate through the rotating shaft, so that the elastic piston piece reciprocates in the chamber two, so as to suck external fluid through the one-way water inlet channel and send it into the heat exchange pipe.

[0009] As an improvement of the above technical scheme, the shell comprises a shell one and a shell two communicated and arranged at the bottom of the shell one, the shell one and the shell two are arranged vertically, and the fixed cylinder is fixedly connected with the bottom of the shell two.

[0010] As an improvement to the above technical solution, the elastic piston component includes a piston movably disposed in the second chamber and a fixing rod fixed to one side of the piston. One end of the fixing rod passes through the partition and extends into the interior of the first chamber, and a spring is wound around the surface of the fixing rod and the section located in the second chamber.

[0011] As an improvement to the above technical solution, the outlet end of the heat exchange tube penetrates the side wall of the second shell and extends to the outside of the second shell, and a pressure valve is provided inside the outlet end of the heat exchange tube extending to the outside of the second shell.

[0012] As an improvement to the above technical solution, the section of the heat exchange tube located inside the second shell has a serpentine structure.

[0013] The beneficial effects of this utility model are:

[0014] The reciprocating movement of the elastic piston within the second chamber controls the external fluid to enter the second chamber through a one-way water inlet channel and be delivered to the heat exchange tube. The fluid in the heat exchange tube can exchange heat with the high-temperature environment inside the shell. The external fluid absorbs heat from the shell, thereby reducing the temperature inside the shell and cooling the gearbox, ensuring that the gearbox can operate normally within a suitable temperature range. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the shell structure of this utility model;

[0016] Figure 2 This is a cross-sectional view of a partial structure of the present invention.

[0017] Reference numerals: 10, Shell 1; 20, Shell 2; 21, Fixed cylinder; 211, Baffle plate; 212, Piston; 213, Spring; 214, Heat exchange tube; 214, Water inlet channel; 22, Heat exchange tube; 30, Power shaft; 31, Rotating shaft; 32, Eccentric wheel. Detailed Implementation

[0018] 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 the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] Marine propeller gearbox, including:

[0020] A housing, wherein a heat exchange tube 22 is provided inside the housing;

[0021] The drive shaft 30 is rotatably inserted into the housing.

[0022] The fixed cylinder 21 is arranged at the bottom of the shell, and the fixed cylinder 21 is arranged inside the shell and is integrally formed with the bottom of the shell. The fixed cylinder 21 is internally fixedly provided with a partition plate 211 for separating the cavity of the fixed cylinder 21 into chamber one and chamber two. The extending direction of the partition plate 211 is perpendicular to the axis of the fixed cylinder. The chamber two is in communication with the water inlet end of the heat exchange pipe 22. The bottom of the chamber two is provided with a one-way water inlet channel 214. A rotating shaft 31 is rotatably connected in the chamber two. The rotating shaft 31 is coaxially connected to the end of the power shaft 30. An eccentric wheel 32 is fixedly sleeved on the surface of the rotating shaft 31. An elastic piston piece is movably arranged in the chamber two. One end of the elastic piston piece extends into the chamber one and the other end of the elastic piston piece is in contact with the outer edge of the eccentric wheel 32. When an external force drives the power shaft 30 to rotate, the power shaft 30 drives the eccentric wheel 32 to rotate through the rotating shaft 31, forcing the elastic piston piece to reciprocate in the chamber two, so as to suck external fluid through the one-way water inlet channel 214 and send the external fluid into the heat exchange pipe 22.

[0023] Specifically, when the gear box is located in water, the power shaft 30 of the gear box drives the eccentric wheel 32 to rotate through the rotating shaft 31. The position of the outer edge of the eccentric wheel 32 changes constantly. With the rotation of the eccentric wheel 32, the eccentric wheel 32 applies a force to the elastic piston piece. When the protruding part of the eccentric wheel 32 gradually moves away from the elastic piston piece, the elastic piston piece reversely moves under the action of its own elasticity, so that the space formed between the piston 212 away from one side of the partition plate 211 and the inner wall of the chamber two gradually increases, and thus the internal pressure decreases to form negative pressure. The one-way valve in the water inlet channel 214 opens, and external fluid is sucked into the chamber two through the one-way water inlet channel 215. When the protruding part of the eccentric wheel 32 gradually approaches the elastic piston piece, the elastic piston piece is pushed to move towards the inside of the chamber two, so that the space formed between the piston 212 away from one side of the partition plate 211 and the inner wall of the chamber two gradually decreases, and thus the internal pressure increases. At this time, the one-way valve in the water inlet channel 214 closes, and the one-way valve on the water inlet end of the heat exchange pipe 22 opens. Under the action of pressure, the sucked external fluid is sent into the heat exchange pipe 22. The external fluid flowing in the heat exchange pipe 22 exchanges heat with the high-temperature environment in the shell due to the heat generated by the gear box during operation, so that the temperature in the shell decreases, thereby cooling the gear box and ensuring that the gear box can normally work in a suitable temperature range.

[0024] In one embodiment, the shell comprises a shell one 10 and a shell two 20 which is communicated with the bottom of the shell one 10, the shell one 10 and the shell two 20 are vertically arranged, the fixed cylinder 21 is fixedly connected with the bottom of the shell two 20, the top of the power shaft 30 penetrates the shell one 10 to be connected with the motor, and the shell two 20 can be provided with a gear set to realize power transmission.

[0025] In one embodiment, the elastic piston member comprises a piston 212 which is movably arranged in the chamber two and a fixed rod which is fixedly arranged on one side of the piston 212, one end of the fixed rod penetrates the partition plate 211 and extends into the chamber one, the surface of the fixed rod is wound with a spring 213 in the chamber two, the outer edge of the eccentric wheel 32 is in contact with the movable rod, when the protruding part of the eccentric wheel 32 gradually moves away from the movable rod, the spring 213 pushes the piston 212 to move reversely, so that the space formed between the piston 212 and the inner wall of the chamber two gradually increases, the one-way valve in the water inlet channel 214 is opened, when the protruding part of the eccentric wheel 32 gradually approaches the movable rod, the movable rod is pushed to drive the piston 212 to move into the chamber two, the spring 213 is compressed, so that the space formed between the piston 212 and the inner wall of the chamber two gradually decreases, and the internal pressure increases, at this time, the one-way valve on the water inlet end of the heat exchange pipe 22 is opened, in this process, the fixed rod drives the piston 212 to move, and the movement of the piston 212 cooperates with the movement of the eccentric wheel 32, so that the rotary motion of the eccentric wheel 32 is converted into the linear reciprocating motion of the piston 212.

[0026] In one embodiment, the water outlet end of the heat exchange pipe 22 penetrates the side wall of the shell two 20 and extends to the outside of the shell two 20, the water outlet end of the heat exchange pipe 22 which extends to the outside of the shell two 20 is provided with a pressure valve, when the pressure in the heat exchange pipe 22 is greater than the pressure of the pressure valve, the fluid in the heat exchange pipe 22 flows out of the shell, the pressure valve ensures that the flow state of the fluid in the heat exchange pipe 22 is stable, so that the heat exchange pipe 22 is filled with liquid, thereby improving the heat exchange efficiency and ensuring the cooling effect.

[0027] In one embodiment, the heat exchange pipe 22 is in a serpentine structure inside the shell two 20, which greatly improves the contact area of the heat exchange pipe 22 and the high-temperature environment in the shell two 20, thereby further improving the cooling effect.

[0028] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit it.

Claims

1. A marine rudder propeller gearbox, characterized in that The utility model provides a kind of heat exchange device, including: Shell, heat exchange pipe (22) is arranged in the shell; Power shaft (30), rotation is inserted in the shell; Fixed cylinder (21) is arranged with the bottom of the shell, the bottom of the shell is integrally formed with fixed cylinder (21), the cavity of the fixed cylinder (21) is divided into chamber one and chamber two by the partition (211) fixedly arranged in the fixed cylinder (21), the extension direction of the partition (211) is perpendicular to the axis of the fixed cylinder, the chamber two is communicated with the water inlet end of the heat exchange pipe (22), the bottom of the chamber two is provided with one-way water inlet channel (214), the chamber two is rotatably connected with rotating shaft (31), the rotating shaft (31) is coaxially connected to the end of the power shaft (30), the surface of the rotating shaft (31) is fixedly sleeved with eccentric wheel (32), the elastic piston piece is movably arranged in the chamber two, one end of the elastic piston piece extends into chamber one and one end thereof is in contact with the outer edge of the eccentric wheel (32), when external force drives the power shaft (30) to rotate, the power shaft (30) drives the eccentric wheel (32) to rotate through rotating shaft (31), forces the elastic piston piece to reciprocate in the chamber two, to suck external fluid through the one-way water inlet channel (214) and send to the heat exchange pipe (22).

2. A marine rudder propeller gearbox according to claim 1, characterised in that: The shell includes shell one (10) and shell two (20) communicated and arranged at the bottom of the shell one (10), the shell one (10) and the shell two are vertically arranged, and the fixed cylinder (21) is fixedly connected with the bottom of the shell two (20).

3. A marine rudder propeller gearbox according to claim 2, characterised in that: The elastic piston piece includes piston (212) movably arranged in the chamber two and fixed rod fixed to one side of the piston (212), one end of the fixed rod penetrates the partition (211) and extends into the chamber one, and a section of the surface of the fixed rod located in the chamber two is wound with spring (213).

4. A marine rudder propeller gearbox according to claim 3, characterised in that: The water outlet end of the heat exchange pipe (22) penetrates the side wall of the shell two (20) and extends to the outside of the shell two (20), and a pressure valve is arranged in the water outlet end of the heat exchange pipe (22) extending to the outside of the shell two (20).

5. A marine rudder propeller gearbox according to claim 4, characterised in that: A section of the heat exchange pipe (22) located in the shell two (20) is in a serpentine structure.

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