CN202754138U - Differential principle based triple-hulled vessel of symmetric type twin propeller driving device - Google Patents

Abstract

The purpose of this utility model is to provide a trimaran with a symmetrical double propeller drive device based on the principle of a differential, including a main hull, a propeller, a ship main engine installed on the main hull, and two The side hull, the differential, the input shaft of the differential is connected to the main engine of the ship, the transmission half shaft of the differential is connected to the propeller, there are two propellers, and the first propeller is installed between the main hull and the first side hull through the first propeller shaft , the second propeller is installed in the middle of the main hull and the second side hull through the second propeller shaft, and the two propellers are installed symmetrically with respect to the main hull. The utility model can effectively reduce the vibration noise when the propeller is in operation, save the energy consumption in the operation of the power device, and effectively improve the flexibility and rapidity of the trimaran.

Description

A trimaran with symmetrical double propeller drive device based on the principle of differential

technical field

The utility model relates to a ship, specifically a trimaran.

Background technique

The research on contemporary trimarans has been going on for more than 20 years, and it was not until the mid-1990s that the research on high-speed trimarans made great progress. During this period, the research on high-speed trimarans at home and abroad mainly focused on hydrodynamic theory, model testing, ship type optimization, and conceptual design. In terms of structural research, Professor Li Yongzheng's "Finite Element Analysis of Trimaran Connecting Bridge Strength" studies the wave load of the trimaran connecting bridge structure, and uses the finite element software MAESTRO to analyze the structural strength of the trimaran. "The development of Trimaran Rules" by Dr E Cheng gives the types of loads and their calculation formulas that should be considered in the design of trimaran structures, including overall loads and local loads. Mizine Igor discussed the preliminary design of the trimaran in "High-speed trimaran drag", and proposed some methods and formulas for the calculation of the load of the trimaran.

In China, the research on high-speed trimarans has also begun to receive attention in recent years. From the end of the 1990s to the beginning of this century, Harbin Engineering University, Shanghai Jiaotong University and Naval Engineering University conducted research on the shape and hydrodynamics of the trimaran at almost the same period, and initially learned about its wave-making resistance and seakeeping performance. Some big advantages. Professor Zheng Feng's "Research on the Performance and Conceptual Design of a Small Waterplane Intermediate-hull Trimaran (TXISWATH)" conducted a preliminary study on the performance, shape and general layout of a small waterplane and intermediate-hull trimaran. Professor Lu Chen's "Conceptual Design of Five-body Car-Passenger Ferry in the Waterplane Plane and Finite Element Analysis of Whole Ship Structure" conducted a comprehensive study on a five-body car-passenger ferry, including scheme design, stability research, and preliminary design of the whole ship structure. and three-dimensional finite element analysis. Regarding the structural design and research of the trimaran, there are few publicly published literatures in China.

For the innovative research on installing the propeller device between the main ship and the side ship of the trimaran, no research on this aspect has been found in the existing public documents at home and abroad.

Contents of the invention

The purpose of the utility model is to provide a trimaran with a symmetrical double propeller drive device based on the principle of a differential, which uses a differential to control the speed and torque of the propellers so as to steer the ship.

The purpose of this utility model is achieved in that:

The utility model is a trimaran with a symmetrical double-screw propeller drive device based on the principle of a differential, comprising a main hull, a propeller, a ship main engine installed on the main hull, and two side hulls installed on both sides of the main hull. The feature is: it also includes a differential, the differential includes an input shaft, a driving bevel gear, a ring gear, a planetary gear shaft, a differential frame, a small planetary gear, a side gear, a transmission half shaft, and the input shaft is connected to the main engine of the ship and The active bevel gear, the active bevel gear is connected and drives the ring gear to rotate, the ring gear is connected to the differential frame, the differential frame is connected to the planetary gear shaft, the small planetary gear is installed on the planetary gear shaft, and there are two side gears, each Mesh with the asteroid gear, there are two transmission half shafts, the first transmission half shaft is connected to the first side gear, and the second transmission half shaft is connected to the second side gear; there are two propellers, the first propeller is installed on the first propeller shaft through the first propeller shaft In the middle of the main hull and the first side hull, the second propeller is installed between the main hull and the second side hull through the second propeller shaft, the two propellers are installed symmetrically with respect to the main hull, the first transmission half shaft is connected to the first propeller shaft, and the second The two transmission half shafts are connected to the second propeller shaft.

The utility model can also include:

1. There are two asteroid gears.

2. The propeller shaft and the drive half shaft are connected through the propeller shaft bevel gear installed on the propeller shaft and the drive shaft bevel gear installed on the drive half shaft.

3. It also includes a differential speed control system. The differential speed control system includes a CPU, a speed and course sensor, a rudder angle sensor, and a brake. The speed and course sensor, a rudder angle sensor, and a brake are all connected to the CPU. After obtaining the expected signal through the rudder angle sensor, control the brake to change the rotational speed of the transmission half shaft of the differential.

The utility model has the advantages that: the utility model installs the propeller installed at the stern of the ordinary ship to both sides of the main hull of the trimaran. The flow rate of the water flow field here is relatively fast, and there is basically no eddy current and turbulent flow, which can effectively reduce the vibration and noise during the operation of the propeller and save the energy consumption of the power plant operation. This innovation has significant effects in terms of energy saving and emission reduction of ships, reduction of energy consumption, improvement of ship endurance, and increase of ship safety. At the same time, instead of using ordinary rudders, a symmetrical double-screw power plant is used instead, which greatly improves the endurance and survivability of the ship. Controlling the symmetrical propeller of the ship based on the principle of the differential can effectively improve the flexibility and speed of the trimaran.

Description of drawings

Fig. 1 is a differential device diagram of the present utility model;

Fig. 2 is the structural representation of the utility model;

Fig. 3 is a schematic diagram of the differential speed control system device of the present invention.

Detailed ways

The utility model is described in more detail below in conjunction with accompanying drawing example:

Combined with Figures 1 to 3, this device consists of the following three parts:

1. Differential device

The differential unit consists of the following two parts

1. Primary and secondary gears, planetary gears. The left and right propellers are connected by half shafts. When the trimaran is going straight, the two planetary gears of the differential do not rotate. When the ship turns, the two planetary gears of the differential and the half shafts on both sides have different speeds according to the needs, so as to realize the differential speed, resulting in different speeds of the propellers on both sides. turn.

2. Gear box. The gear transmission assembly that transmits power through transmission gears uses two bevel gears to vertically transmit the torque of the main engine to the half shafts on both sides.

2. Symmetrical twin propellers installed on both sides of the main hull

The propeller installation installed between the main side hulls mainly consists of three parts:

1. Propeller. It adopts ordinary three-blade propeller or four-blade propeller, the propeller blades on the left and right sides rotate in the opposite direction, and the propeller disk surface and other coefficients are the same. The two propellers are installed in the middle of the main hull and the side hulls, symmetrically installed on the left and right.

2. Right angle gear transmission. The transmission between the power generating device and the propeller adopts a right-angle structure, which is connected by a bevel gear through a gearbox.

3. The propeller device is installed on the lower side of the connecting bridge, completely submerged in water, and lower than the waterline of the trimaran.

3. Differential speed control system

The differential speed control system consists of the following two parts

1. Parameter acquisition CPU device. Collect real-time signals such as the speed and heading of the trimaran, compare them with the set expected signals, calculate the existing deviation, and output the voltage signal of the adjustment amount.

2. Electronic brake. Receive the voltage signal transmitted by the CPU device, and realize asymmetrical braking on the half shaft, thereby changing the speed of the half shaft.

When the ship is running, the main engine of the ship transmits torque to the input shaft 9 of the differential, and the input shaft 9 of the differential drives the driving bevel gear 2 to rotate. The active bevel gear 2 drives the ring gear 6 to rotate in the entire gear box of the differential, and when the ring gear 6 rotates, it drives the two small planetary gears 8 of the differential on it through the differential frame 3 and the planetary gear shaft 7, The differential planetary gear 8 drives the side gears 4 on the left and right sides to rotate at the same speed at the same time. The side gears 4 on both sides are connected with the half shaft 5 and rotate in the transmission shaft housing 1 . When the trimaran turns and changes direction, the half shaft on one side is properly braked through the electronic brake, and the differential asteroid gear 8 on the differential frame 3 is connected to the asteroid gear on the other side through the planetary gear shaft 7 connected to it. 8 The rotation speeds are inconsistent, so that the side gears 4 on both sides have a speed difference. After the transmission half shaft 5 drives the other pair of bevel gears to change the torque direction, the propeller shafts 12 on both sides are controlled to rotate at different speeds to realize the ship's direction change.

The power of the main engine passes through the transmission of the differential, and passes in the corridor between the main hull 18 and the side hull 17 from the inside of the main hull 18 . The transmission half shaft 5 is installed on the connecting bridge 15 outside the main hull 18, and the rotation of the transmission shaft 5 is transmitted to the vertical propeller shaft 12 through the gearbox 16 under the joint action of the propeller shaft bevel gear 10 and the transmission shaft bevel gear 11 , the propeller shaft 12 drives the common propeller 13 to rotate, thereby promoting the trimaran to turn or advance. The propeller shaft 12 is installed in the middle position 14 of the main hull and the side hull, and the left and right sides are completely symmetrical. The installation position of the propeller and the combined use of the differential device further improve the propulsion efficiency of the trimaran power plant, improve the fuel efficiency of the trimaran, reduce the resistance of the propeller propeller when the trimaran is moving forward, and reduce the Vibration and noise generated by propeller operation.

The CPU 20 of the differential speed control system collects and processes real-time signals 24 from the speed of the trimaran, the course sensor 22, etc., and compares them with the expected signal 26 from the rudder angle sensor 23, calculates the existing error, and outputs the required adjustment amount. The voltage 25 is controlled to control the electronic brake 21, so that the electronic controller 21 can change the rotational speed of the differential transmission half shaft 9, adjust the speed of the propellers 13 on both sides, and achieve the purpose of turning and changing direction.

Compared with the installation form of the same type of ship power device (for example, installed at the tail of the hull) of the utility model patent: the efficiency of the utility model patent will be 2% to 3% higher than that of the ordinary power device installation position; The new device replaces the rudder of the ship with a symmetrical propeller device. Now general ships all have rudders, which are used to change the direction of ship navigation. Ordinary rudders have two functions of maintaining the ship's predetermined course and changing the ship's sailing direction. Install battery packs where power mechanical transmission structures and power generating devices (diesel engines, gas turbines, steam turbines, nuclear power devices, etc.) should have been installed. A differential device is used to control the left and right symmetrical propellers. When the ship is running, the differential control system collects and compares various operating parameters of the trimaran, and adjusts the speed difference between the two propellers through the differential to achieve steering. the goal of.

Claims (5)

1. trimaran based on the symmetrical expression twin screw actuating device of diff principle, comprise main body, screw propeller, be installed in the marine main engine on the main body, be installed in two side hulls of main body both sides, it is characterized in that: also comprise diff, diff comprises input shaft, the initiative taper generating gear, gear ring, compensating-gear shaft, the diff frame, small planetary gear, side gear, jackshaft, input shaft connects marine main engine and initiative taper generating gear, the initiative taper generating gear connects and the drive gear ring rotates, gear ring connected with differential frame, the diff frame connects compensating-gear shaft, small planetary gear is installed on the compensating-gear shaft, side gear has two, all mesh with small planetary gear, jackshaft has two, the first jackshaft connects the first side gear, and the second jackshaft connects the second side gear; Screw propeller has two, the first screw propeller is installed in the middle of main body and the first side hull by the first prop shaft, the second screw propeller is installed in the middle of main body and the second side hull by the second prop shaft, two screw propellers are with respect to the symmetrical installation of main body, the first jackshaft connects the first prop shaft, and the second jackshaft connects the second prop shaft.

2. the trimaran of a kind of symmetrical expression twin screw actuating device based on the diff principle according to claim 1, it is characterized in that: described small planetary gear has two.

3. the trimaran of a kind of symmetrical expression twin screw actuating device based on the diff principle according to claim 1 and 2 is characterized in that: link to each other with transmission shaft bevel gear on being installed in jackshaft by the prop shaft bevel gear that is installed on the prop shaft between prop shaft and the jackshaft.

4. the trimaran of a kind of symmetrical expression twin screw actuating device based on the diff principle according to claim 1 and 2, it is characterized in that: also comprise differential control system, described differential control system comprises CPU, speed of a ship or plane heading sensor, rotation angle sensor, drg, speed of a ship or plane heading sensor, rotation angle sensor, drg all link to each other with CPU, after CPU obtained desired signal by speed of a ship or plane heading sensor acquisition ship speed course, by rotation angle sensor, the control drg changed the rotating speed of the jackshaft of diff.

5. the trimaran of a kind of symmetrical expression twin screw actuating device based on the diff principle according to claim 3, it is characterized in that: also comprise differential control system, described differential control system comprises CPU, speed of a ship or plane heading sensor, rotation angle sensor, drg, speed of a ship or plane heading sensor, rotation angle sensor, drg all link to each other with CPU, after CPU obtained desired signal by speed of a ship or plane heading sensor acquisition ship speed course, by rotation angle sensor, the control drg changed the rotating speed of the jackshaft of diff.

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