CN101177165A - Double-pipe spiral water jet propeller - Google Patents

Abstract

The utility model relates to a double-pipe spiral water jet propeller, a main shaft 3 and a spiral impeller 2 are arranged in a casing 1 . The cross-section of the shell 1 is in the shape of an X-shaped four-way pipe, and there are two pipes 7 at both axial ends. The two pipes 7 are distributed in a helical shape, and their axes form an included angle with the axis of the main shaft 3 and form a double-pipe helical flow channel in the shell 1 . Bearing support 5 and bearing 4 are equipped with at main shaft 3 two ends, and seal ring 6 is housed between bearing 4 and bearing support 5. The invention adopts double-pipe spiral structure and spiral impeller to cooperate, which not only has the function of the diversion groove of the axial flow water jet propeller, but also has the function of the pressure water chamber of the centrifugal water jet propeller, and has the axial flow of large flow The comprehensive advantages of the pump and the high-pressure centrifugal pump can obtain a more powerful water jet propulsion force and a large speed increase potential. It is an efficient and energy-saving water jet propulsion system.

Description

Double-pipe spiral water jet propeller

technical field

The present invention relates to a propulsion system for high speed ships or other fast water sports vehicles. Specifically, it refers to a double-pipe spiral water jet propeller

Background technique

Propeller technology is the core technology of high-speed craft. Most of the existing marine propulsion devices are internal combustion engines or steam turbines, which use electric motors or transmissions to drive propellers to provide propulsion power for ships.

Recently, the water jet propulsion method has become a hot spot in the research of ship propulsion devices. However, the existing water-jet propulsion devices have defects such as small flow rate, small thrust force, and large energy loss, which are not conducive to energy saving, efficiency increase, and speed increase.

Contents of the invention

The technical problem to be solved by the present invention is to provide a double-pipe helical water-jet propeller with a simple and reasonable structure and high efficiency for ships in view of the defects in the prior art.

The technical solution of the present invention is that the double-pipe helical water jet propeller, referring to FIGS. 1 to 3 , has a main shaft 3 and a helical impeller 2 installed in its casing 1 . The helical impeller 2 is coaxially sleeved on the main shaft 3 . Its technical feature is that the cross-section of the shell 1 is in the shape of an X-shaped four-way pipe, and two pipes 7 with the nozzles facing outward are respectively provided at both axial ends. The two pipes 7 at both axial ends of the casing 1 are distributed in a spiral shape, and their axes form an included angle with the axis of the main shaft 3 , thereby forming a double-pipe spiral flow channel in the casing 1 . Bearing support 5 and bearing 4 are also installed at its two ends of above-mentioned main shaft 3, and sealing ring 6 is installed on the main shaft 3 between this bearing 4 and bearing support 5.

The beneficial effect of the present invention is that the double-tube spiral water jet propeller of the present invention, which is composed of the above components, adopts the double-tube spiral structure and the spiral impeller to form a double-tube spiral flow channel in the inner cavity of the water jet propeller, so that When it works, it not only has the function of the diversion groove of the axial flow water jet propeller, but also has the function of the pressure water chamber of the centrifugal water jet propeller, and has the comprehensive advantages of both the large flow axial flow pump and the high pressure centrifugal pump. , so as to obtain more powerful water jet propulsion than ordinary water jet propellers. The propeller has the characteristic of great speed-up potential, and is a highly efficient and energy-saving water jet propulsion system.

Description of drawings

Fig. 1 is the structural representation of a specific embodiment of double-pipe helical water jet propeller of the present invention;

Fig. 2 is a schematic diagram of the appearance of the twin-pipe helical water jet propeller shown in Fig. 1;

Fig. 3 is a left side view of the twin-pipe helical water jet propeller shown in Fig. 2 .

Figures 1 to 3 are marked as:

1- shell,

2- spiral impeller,

3-spindle,

4- bearing,

5- Bearing support,

6- sealing ring,

7- Pipeline.

Detailed ways

Referring to accompanying drawing 1～3, this embodiment of double-pipe helical water jet propeller of the present invention, its shell 1 is made of stainless steel, and the section is X-shaped four-way tubular, wall thickness 10mm. Two axial ends of the casing 1 are respectively two pipes 7 with the nozzles facing outward. The diameter of the pipe 7 is Φ219mm.

The main shaft 3 and the helical impeller 2 coaxially sleeved on the main shaft 3 are installed in the casing 1 . The two pipes 7 at both axial ends of the shell 1 are distributed in a spiral shape, and their axes form an included angle with the axis of the main shaft 3 , thereby forming a double-pipe spiral flow channel in the shell 1 . The main shaft 3 is 800mm long, the maximum shaft diameter is Φ50mm, and the minimum shaft diameter is Φ40mm.

Bearings 4 with bearing brackets 5 are installed at both ends of the above-mentioned main shaft 3 . The sealing ring 6 is made of rubber, with a thickness of 20mm, and is installed on the main shaft 3 between the bearing 4 and the bearing support 5.

The twin-pipe helical water-jet propeller of this embodiment of the present invention constituted thus proves to be effective through trial production and probation, and fully meets the design requirements.

The length of the bearing holder and the diameter of the bearing are compatible with the size of the main shaft, and are determined by comprehensively considering the size and speed of the impeller.

Claims (1)

1. A double-tube spiral water jet propeller, a main shaft (3) and a helical impeller (2) are installed in its shell (1), and the coaxial shaft of the helical impeller (2) is sleeved on the main shaft (3), It is characterized in that the section of the housing (1) is in the shape of an X-shaped four-way tube, and its axial ends respectively have two pipes (7) with nozzles facing outwards, and the two pipes (7) at the axial ends of the housing (1) are 7) It is distributed in a spiral shape, and its axis forms an included angle with the axis of the main shaft (3), thereby forming a double-pipe spiral flow channel in the casing (1). The two ends of the main shaft (3) are also equipped with bearing holders (5) and bearing (4), sealing ring (6) is installed on the main shaft (3) between this bearing (4) and bearing support (5).

Images