CN114104247A

CN114104247A - Gear-driven water jet propulsion device control mechanism

Info

Publication number: CN114104247A
Application number: CN202111467507.4A
Authority: CN
Inventors: 张岩; 张志远; 周旻; 林辉; 戴原星; 耿皓
Original assignee: 708th Research Institute of CSIC
Current assignee: 708th Research Institute of CSIC
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-03-01
Anticipated expiration: 2041-12-03
Also published as: CN114104247B

Abstract

The invention discloses a gear-driven water jet propulsion device operating mechanism which is characterized by comprising an inner rudder stock, an outer rudder stock, a shell, an upper jaw and a lower jaw, wherein the outer rudder stock is sleeved outside the inner rudder stock; when the inner rudder stock rotates, the upper jaw and the lower jaw are driven to rotate together through the transmission gear set. The mechanism of the invention has simple and reliable reversing action, and reduces the precision requirement of installation and positioning; is suitable for a single device; when backing, the backing water flow deflection channel formed by the mechanism is extended, so that the loss of water flow deflection is reduced; the ship has the capability of improving the stability of the ship course and adjusting the ship posture to a certain extent, and makes up the defects of the water jet propulsion device.

Description

Gear-driven water jet propulsion device control mechanism

Technical Field

The invention relates to a control mechanism of a water jet propulsion device, in particular to a gear-driven control mechanism of the water jet propulsion device, belonging to the field of special marine propellers.

Background

The principle of the water jet propulsion device is that the jet direction of water flow is changed through the action of the mechanism, so that the direction of force generated by a propeller is changed, and the motion of a ship is changed. The current main steering and backing mechanism comprises a box-type steering and backing mechanism (shown in figure 1) suitable for an internal water jet propulsion device and a combined rudder (shown in figures 2 and 3) suitable for an external suspension water jet propulsion device.

As shown in figure 1, a box-type steering and backing mechanism pushes a rudder 1-2 to swing left and right through a steering hydraulic cylinder 1-5, so that water flows are deflected left and right to generate transverse steering force; the original upper jaw 1-1 and the original lower jaw 1-3 are driven to close by the backstroke hydraulic cylinder 1-4, so that the water flow deflects downwards and forwards to generate a backstroke force, as shown in fig. 4 and 5. The steering and backing mechanism in the form is complex in movement and high in requirement on node positioning accuracy of each part. In addition, the oil cylinder is exposed outside the cabin, is subjected to adverse environments such as sunshine, water flow soaking impact and the like for a long time, is easy to corrode and damage, and is not easy to maintain.

As shown in fig. 2 and 3, the combined rudder is a few steering and astern running mechanisms suitable for being arranged below a water line and suitable for an externally suspended water jet propulsion device. It generates steering force by the left and right rotation of the rudder case 2-2; the rudder blade 2-1 deflects towards one side to form a channel with the closed rudder housing 2-2 by the control of the rudder stock 2-3, so that the water flow deflects towards the outside and the front to generate the backing force (as shown in figures 6 and 7). Since a single combined rudder generates a lateral force when backing, the lateral force must be offset by pairing two rudder pairs. In addition, when the steering and backing mechanism is used for backing, the water flow steering is too violent, the loss is large, and the backing efficiency is low.

In addition, the waterjet propulsion device itself has other disadvantages:

firstly, the rudder blade of the conventional rudder propeller not only provides the function of steering, but also has the function of improving the course stability of the ship. The steering and backing mechanism of the water jet propulsion device does not have this function, so the course stability of the water jet propulsion ship is generally poor.

Secondly, the water flow is accelerated by the suction action of the water jet propulsion device at an inlet, and the pressure near the stern part of the ship bottom is reduced, so that the ship is inclined from stern and the resistance is increased. Most waterjet propelled vessels are fitted with cut-off plates to avoid this problem.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: how to make the operation mechanism of the water jet propulsion device simple in structure, suitable for a single device to use, and improve the stern inclination and course stability of the water jet propulsion ship.

In order to solve the technical problem, the technical scheme of the invention provides a gear-driven water jet propulsion device control mechanism which is characterized by comprising an inner rudder stock, an outer rudder stock, a shell, an upper jaw and a lower jaw, wherein the outer rudder stock is sleeved on the outer side of the inner rudder stock, the outer rudder stock is rigidly connected with the shell, the inner rudder stock penetrates through the shell to be connected with a transmission gear set, the upper jaw is connected with the transmission gear set through a first transmission shaft, and the lower jaw is connected with the transmission gear set through a second transmission shaft; when the inner rudder stock rotates, the upper jaw and the lower jaw are driven to rotate together through the transmission gear set.

Preferably, the inner rudder stock and the outer rudder stock are sleeve shaft structures which can rotate independently and together.

Preferably, the shell is a door-shaped shell, and the shell is a cavity structure for accommodating the gear.

Preferably, the shell is provided with a rib plate for supporting the shell.

Preferably, the shape of the upper jaw and the lower jaw is the geometrical shape of the wing.

Preferably, the upper and lower jaw profiles have upper surfaces that are curved to a greater extent than lower surfaces.

Preferably, the transmission gear set comprises a bevel gear set and a cylindrical gear set; the inner rudder stock penetrates through the shell to be connected with the bevel gear set, the upper jaw is connected with the bevel gear set and the cylindrical gear set through the first transmission shaft, and the lower jaw is connected with the cylindrical gear set through the second transmission shaft.

Preferably, the inner tiller is connected to a bevel gear of the bevel gear set through the housing.

Preferably, the upper jaw is fixed on a first transmission shaft, one end of the first transmission shaft is fixedly connected with a cylindrical gear and a bevel gear, and the bevel gear on the first transmission shaft is meshed with the bevel gear on the inner rudder stock; the lower jaw is fixed on the second transmission shaft, one end of the second transmission shaft is fixed with a cylindrical gear, and the cylindrical gear on the first transmission shaft is meshed with the cylindrical gear on the second transmission shaft.

Preferably, the two sides of the shell are provided with vertical plates extending downwards.

Compared with the steering and backing mechanism of the existing water jet propulsion device, the gear-driven water jet propulsion device operating mechanism is suitable for both the built-in water jet propulsion device and the externally-suspended water jet propulsion device, and has wide application range. The transmission mechanism consists of a group of bevel gears and a group of cylindrical gears. The bevel gear group is used for transmission, and the cylindrical gear group is used for controlling the upper jaw and the lower jaw to open and close, and has the advantages of simple structure, low assembly precision requirement, and difficult damage of the gear in the gear hiding and the shell. The upper jaw and the lower jaw are in wing shapes, can generate lift force when in forward navigation, improves the stern inclination of the water jet propulsion ship, and can replace the shutoff plate to a certain extent. The vertical plates on the two sides of the shell extend downwards, and the effect that the conventional rudder maintains the course stability of the ship can be achieved to a certain degree. When backing a car, the included angle that upper and lower jaw formed is moderate in size, has both guaranteed the size of the power of backing a car, is unlikely to again to have too much loss because of rivers turn to acutely, and backing a car efficiency is higher.

The mechanism of the invention has simple and reliable reversing action, and reduces the precision requirement of installation and positioning; is suitable for a single device; when backing, the backing water flow deflection channel formed by the mechanism is extended, so that the loss of water flow deflection is reduced; the ship has the capability of improving the stability of the ship course and adjusting the ship posture to a certain extent, and makes up the defects of the water jet propulsion device.

Drawings

FIG. 1 is a schematic view of a box steering mechanism;

FIG. 2 is a schematic view of a combined rudder suitable for an overhung waterjet propulsion unit;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a schematic diagram of box steering astern mechanism steering;

FIG. 5 is a schematic diagram of a box steering reverse mechanism for reversing;

FIG. 6 is a schematic diagram of combined steering;

FIG. 7 is a schematic diagram of combined rudder reverse sailing;

FIG. 8 is a schematic view of a geared water jet propulsion unit steering mechanism;

FIG. 9 is a side schematic view of FIG. 8;

FIG. 10 is a cross-sectional view A-A of FIG. 8;

FIG. 11 is a schematic view of a geared water jet propulsion unit steering mechanism when in a forward position;

FIG. 12 is a schematic view of a geared water jet propulsion unit operating mechanism during reverse.

Detailed Description

In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

The invention provides a gear-driven water jet propulsion device operating mechanism which is composed of an inner rudder stock 3-2, an outer rudder stock 3-1, a shell 3-3, an upper jaw 3-5, a lower jaw 3-7, a bevel gear set 3-4 and a cylindrical gear set 3-6 as shown in figures 8-10. The inner rudder stock 3-2 and the outer rudder stock 3-1 are sleeve shaft structures and can rotate independently or together. The outer rudder stock 3-1 is rigidly connected with the shell 3-3, and the shell 3-3 rotates along with the outer rudder stock 3-1; the inner rudder stock 3-2 passes through the outer shell 3-3 to be connected with a bevel gear of the bevel gear group 3-4, and the bevel gear rotates along with the inner rudder stock 3-2. The shell 3-3 is a door-shaped shell, the inlet edge has a certain radian to reduce resistance, and the shell is of a cavity structure and is used for accommodating a gear. Criss-cross rib plates are arranged on the shell 3-3, so that the strength of the shell 3-3 is improved. The upper jaws 3-5 have a wing-like geometry with a profile in which the upper surface is curved more than the lower surface and are connected to a cylindrical gear and a bevel gear via a first drive shaft for rotation with the gears. The lower jaw 3-7 has the same geometrical cross-section as the upper jaw 3-5 and is connected to a cylindrical gear via a second drive shaft for rotation therewith. The transmission gear set consists of a pair of bevel gear sets 3-4 and a pair of cylindrical gear sets 3-6, and comprises 2 bevel gears and 2 cylindrical gears. The rotation of the rudder stock is transferred to the rotation of the upper jaw 3-5 by means of 2 bevel gears and then the rotation of the upper jaw 3-5 is transferred to the lower jaw 3-7 by means of 2 cylindrical gears. Vertical plates on two sides of the shell 3-3 extend downwards, and the effect of improving the course stability of the ship is achieved.

The upper jaw 3-5 is fixed on a first transmission shaft, one end of the first transmission shaft is fixedly provided with a cylindrical gear connected with a bevel gear, and the bevel gear on the first transmission shaft is meshed with the bevel gear on the inner rudder stock 3-2; the lower jaws 3-7 are fixed on a second transmission shaft, one end of the second transmission shaft is fixed with a cylindrical gear, and the cylindrical gear on the first transmission shaft is meshed with the cylindrical gear on the second transmission shaft.

The invention can change the angle of the reverse sailing water flow by adjusting the gear ratio of the cylindrical gear set 3-6 and the sizes of the upper jaw 3-5 and the lower jaw 3-7.

The working principle of the invention is as follows:

as shown in fig. 11, when the ship is sailing, the upper jaw 3-5 and the lower jaw 3-7 are kept horizontal, and when water flows through the upper jaw 3-5 and the lower jaw 3-7, the flow velocity of the upper surface is high, the flow velocity of the lower surface is low, upward lift force is generated, the posture of the ship can be adjusted, and the problem of stern inclination caused by the water jet propulsion device is solved. And meanwhile, the vertical plates on the two sides of the shell 3-3 play a role in improving the course stability of the ship.

During steering, the inner rudder stock 3-2 and the outer rudder stock 3-1 rotate simultaneously to drive the steering mechanism to rotate integrally, change the direction of the water jet and generate transverse force to steer the ship. When backing, as shown in fig. 12, the inner rudder stock 3-2 rotates to drive the gear set to rotate, the upper jaw 3-5 and the lower jaw 3-7 rotate reversely to close, and form a channel together with the outer shell 3-3, so that water flow deflects downwards and forwards, and a backing force is generated to back the ship.

Claims

1. A gear-driven water jet propulsion device control mechanism is characterized by comprising an inner rudder stock (3-2), an outer rudder stock (3-1), a shell (3-3), an upper jaw (3-5) and a lower jaw (3-7), wherein the outer rudder stock (3-1) is sleeved on the outer side of the inner rudder stock (3-2), the outer rudder stock (3-1) is rigidly connected with the shell (3-3), the inner rudder stock (3-2) penetrates through the shell (3-3) to be connected with a transmission gear set, the upper jaw (3-5) is connected with the transmission gear set through a first transmission shaft, and the lower jaw (3-7) is connected with the transmission gear set through a second transmission shaft; when the inner rudder stock (3-2) rotates, the upper jaw (3-5) and the lower jaw (3-7) are driven to rotate together through the transmission gear set.

2. A gear driven steering mechanism for a water jet propulsion device according to claim 1, characterised in that the inner rudder stock (3-2) and the outer rudder stock (3-1) are both independently rotatable and co-rotatable sleeve shaft arrangements.

3. A geared water jet propulsion unit steering mechanism as claimed in claim 1, in which the housing (3-3) is a door-shaped housing having a cavity for receiving the gear.

4. A gear driven water jet propulsion unit steering mechanism according to claim 1, characterised in that said outer shell (3-3) is provided with ribs for supporting the outer shell (3-3).

5. A geared water jet propulsion device steering mechanism as claimed in claim 1, in which the upper jaw (3-5) and the lower jaw (3-7) are both shaped as airfoils.

6. A geared water jet propulsion device steering mechanism as claimed in claim 1 or 5, in which the upper (3-5) and lower (3-7) cross-sections are curved to a greater extent at the upper surface than at the lower surface.

7. A geared water jet propulsion unit steering mechanism as claimed in claim 1, in which said drive gear set comprises a bevel gear set (3-4) and a spur gear set (3-6); the inner rudder stock (3-2) penetrates through the shell (3-3) to be connected with the bevel gear set (3-4), the upper jaw (3-5) is connected with the bevel gear set (3-4) and the cylindrical gear set (3-6) through a first transmission shaft, and the lower jaw (3-7) is connected with the cylindrical gear set (3-6) through a second transmission shaft.

8. A gear driven water jet propulsion device steering mechanism according to claim 7, characterised in that the inner tiller (3-2) is connected through the housing (3-3) to a bevel gear of the bevel gear set (3-4).

9. A geared water jet propulsion unit steering mechanism as claimed in claim 8, in which the upper jaw (3-5) is fixed to a first drive shaft, which is fixed at one end to a cylindrical gear and a bevel gear, the bevel gear on the first drive shaft engaging with the bevel gear on the inner tiller (3-2); the lower jaw (3-7) is fixed on the second transmission shaft, one end of the second transmission shaft is fixed with a cylindrical gear, and the cylindrical gear on the first transmission shaft is meshed with the cylindrical gear on the second transmission shaft.

10. A geared water jet propulsion unit steering mechanism as claimed in claim 1, in which the casings (3-3) are provided on both sides with downwardly extending risers.