CN114104239A

CN114104239A - Split type water jet propulsion inlet runner structure

Info

Publication number: CN114104239A
Application number: CN202111455157.XA
Authority: CN
Inventors: 汲国瑞; 孟堃宇; 李京; 耿皓; 梁珺; 韩方林
Original assignee: 708th Research Institute of CSIC
Current assignee: 708th Research Institute of CSIC
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-03-01

Abstract

The invention discloses a split type water jet propulsion inlet flow passage structure which is characterized by comprising a vertical plate, a base and a bent pipe flow passage, wherein the vertical plate, the base and the bent pipe flow passage are three parts which are independently processed, the side surface end of the vertical plate is connected with the side surface end of the bent pipe flow passage, the bottom end of the bent pipe flow passage is connected with the top end of the base, and the edge and the bottom end of the vertical plate are connected with the base. The invention can obviously reduce casting defects, improve structural strength, simplify processing technology, reduce equipment requirements, shorten manufacturing period and effectively improve the safety, reliability and economy of the water-jet propeller while ensuring the hydrodynamic performance of the inlet runner.

Description

Split type water jet propulsion inlet runner structure

Technical Field

The invention relates to a split type water jet propulsion inlet runner structure, and belongs to the technical field of ship propulsion.

Background

The inlet runner is an important flow passage component of the water jet propulsion device, takes the task of guiding water flow into the propeller from the bottom of the ship and transmitting the thrust generated by the propeller to the ship body, and plays an important role in the whole water jet propulsion device. The inlet runner of the small and medium-sized water jet propulsion unit is generally formed by integral casting, as shown in fig. 1, but in order to meet the design requirements of a jet pump on the inlet uniformity and the structural strength, the inlet runner applied to a high-speed ship often has the problems of complex structure, overlarge size, concentrated rib plates and the like, the casting defect risk is increased in the integral casting forming process, and the problems of complex process, high requirements on processing equipment, long processing period and the like exist in the large-size inlet runner machining process.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: how to avoid the risk of casting defects of the inlet channel.

In order to solve the technical problem, the technical scheme of the invention is to provide a split type water jet propulsion inlet flow channel structure which is characterized by comprising a vertical plate, a base and a bent pipe flow channel, wherein the vertical plate, the base and the bent pipe flow channel are three parts which are independently processed, the side end of the vertical plate is connected with the side end of the bent pipe flow channel, the bottom end of the bent pipe flow channel is connected with the top end of the base, and the edge and the bottom end of the vertical plate are both connected with the base.

Preferably, the vertical plate is provided with a first connecting surface connected with the elbow runner, a second connecting surface connected with the base, and a third connecting surface horizontally connected with the base.

Preferably, the base is provided with a first flange surface connected with the elbow runner, a toggle plate connected with the vertical plate and a horizontal surface connected with the vertical plate.

Preferably, the elbow runner is provided with a flange connected with the vertical plate and a second flange surface connected with the base.

Preferably, an O-ring is disposed between the base and the elbow flow channel.

Preferably, the base and the elbow flow channel are connected through bolts in a fastening mode.

Preferably, an O-ring is arranged between the vertical plate and the flow channel elbow.

Preferably, the riser and the runner elbow are fixedly connected through a bolt.

Preferably, the elbow flow channel is provided with a grid mounting interface, and the grid mounting interface is provided with a grid.

Preferably, the grid is arranged on the elbow of the elbow channel, so that the linear shape of the inlet channel lip of the elbow channel is directly contained on the grid.

The large-size inlet runner formed by integral casting is divided into three separately processed parts, namely a two-section welding part and a one-section casting part, so that the manufacturing difficulty of the large-size inlet runner can be remarkably reduced. The vertical plate and the base are manufactured in a welding mode, so that casting defects are reduced, and the structural strength is improved. And once a certain part in the split-type inlet runner is damaged, the part can be directly replaced, and the interchangeability and the maintainability are good. The three components are connected through high-strength bolts, and grid mounting positions are arranged. The hydrodynamic performance of the inlet runner is guaranteed, meanwhile, casting defects can be obviously reduced, structural strength is improved, the machining process is simplified, equipment requirements are reduced, the manufacturing period is shortened, and safety, reliability and economy of the water jet propeller are effectively improved.

Drawings

FIG. 1 is a schematic illustration of a large scale integrally cast inlet channel;

FIG. 2 is a schematic view of a split jet propulsion inlet channel configuration;

FIG. 3 is a schematic view of a riser;

FIG. 4 is a schematic view of a base;

FIG. 5 is a schematic view of an elbow flow passage;

FIG. 6 is a schematic view of the connection between the base and the flow channel of the elbow;

FIG. 7 is a schematic view of the connection of the riser to the base and the flow passage of the elbow;

fig. 8 is a schematic view of a grid mounting interface on a split waterjet propulsion inlet channel structure.

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 split type water jet propulsion inlet runner structure which comprises a vertical plate 1, a base 2 and a bent pipe runner 3, wherein the side end of the vertical plate 1 is connected with the side end of the bent pipe runner 3, and the bottom end of the bent pipe runner 3 is connected with the top end of the base 2; the edge and the bottom of the vertical plate 1 are both connected with the base 2. Riser 1 and base 2 can form through the panel welding, have reduced the manufacturing difficulty greatly, and return bend runner 3 can adopt the casting shaping because the inner wall line type is complicated.

As shown in FIG. 3, the riser 1 has 3 connecting positions, which are respectively a first connecting surface 11 connected with the elbow flow passage 3, a second connecting surface 12 connected with the base 2, and a third connecting surface 13 horizontally connected with the base 2,

as shown in fig. 4, the base 2 has 3 connecting positions, which are a first flange surface 21 connected to the elbow flow passage 3, a toggle plate 22 connected to the vertical plate 1, and a horizontal surface 23 connected to the vertical plate 1.

As shown in fig. 5, the elbow flow path 3 has 2 connecting positions, namely a flange 31 connected with the vertical plate 1 and a second flange surface 32 connected with the base 2.

As shown in fig. 7, when assembling the riser 1, the base 2, and the elbow flow path 3, the first flange surface 21 of the base 2 and the second flange surface 32 of the elbow flow path 3 are first connected by bolts, and the water tightness is ensured by O-ring O1 on both flange surfaces, as shown in fig. 6. Then, the vertical plate 1 is connected with the two components, the first connecting surface 11 of the vertical plate 1 is connected with the flange 31 of the runner bent pipe 3, the second connecting surface 12 of the vertical plate 1 is connected with the toggle plate 22 of the base 2, and the third connecting surface 13 of the vertical plate 1 is connected with the horizontal surface 23 of the base 2 by bolts. Wherein, O-shaped ring O2 is used for ensuring watertight between the first connecting surface 11 and the flange 31, plane sealant is used for ensuring watertight between the second connecting surface 12 and the toggle plate 22, between the third connecting surface 13 and the horizontal plane 23, and finally, the three parts are assembled into a complete part.

As shown in fig. 8, a grid mounting interface 33 is reserved on the elbow flow channel 3, and the grid 4 can be directly mounted on the elbow of the elbow flow channel 3, so that the line type of the inlet flow channel lip of the elbow flow channel 3 can be directly contained on the grid 4, and the processing difficulty of the ship in manufacturing can be reduced.

Claims

1. The utility model provides a split type water jet propulsion inlet runner structure, its characterized in that, including riser (1), base (2), return bend runner (3), riser (1), base (2), return bend runner (3) are the part of three independent processing, and the side end of riser (1) is connected with the side end of return bend runner (3), and the bottom of return bend runner (3) is connected with the top of base (2), and the edge and the bottom of riser (1) all are connected with base (2).

2. The split water jet propulsion inlet flow passage structure as claimed in claim 1, wherein the vertical plate (1) is provided with a first connecting surface (11) connected with the elbow flow passage (3), a second connecting surface (12) connected with the base (2), and a third connecting surface (13) horizontally connected with the base (2).

3. A split water jet propulsion inlet runner structure as claimed in claim 1, wherein the base (2) is provided with a first flange surface (21) connected to the elbow runner (3), a toggle plate (22) connected to the vertical plate (1), and a horizontal surface (23) connected to the vertical plate (1).

4. The split water jet propulsion inlet flow channel structure as claimed in claim 1, wherein the elbow flow channel (3) is provided with a flange (31) connected with the vertical plate (1) and a second flange surface (32) connected with the base (2).

5. A split jet propulsion inlet channel structure as claimed in claim 1, wherein an O-ring (O1) is provided between the base (2) and the elbow channel (3).

6. A split jet propulsion inlet channel structure as claimed in claim 1 or 5, wherein the base (2) and the elbow channel (3) are fastened together by bolts.

7. The split water jet propulsion inlet flow channel structure as claimed in claim 1, wherein an O-ring (O2) is provided between the riser (1) and the flow channel elbow (3).

8. The split water jet propulsion inlet runner structure as claimed in claim 1 or 7, wherein the riser (1) and the runner elbow (3) are fastened by bolts.

9. A split water jet propulsion inlet channel structure as claimed in claim 1, wherein the elbow channel (3) is provided with a grille mounting port (33), and the grille mounting port (33) is provided with a grille (4).

10. A split jet propulsion inlet channel structure as claimed in claim 9, wherein the grill (4) is provided on the elbow of the elbow channel (3) such that the line at the inlet channel lip of the elbow channel (3) is directly contained on the grill (4).