CN209795795U - Multistage rotary pipe type pump jet propeller - Google Patents

Abstract

The utility model belongs to mechanical equipment, in particular to propeller is spouted to multistage coil formula pump. The left end outer circumference of the outer guide pipe is provided with a guide cone, the outer wall of the guide cone is provided with a plurality of lateral gill holes, the right end of the disrotatory flow distribution pipe is connected with a plurality of rotary pipe bodies, each rotary pipe body comprises a main pipe, a plurality of branch pipes and a flow distribution disc, the plurality of branch pipes are uniformly distributed and arranged on the main pipe along the circumferential direction, one end of each branch pipe is respectively communicated with the main pipe, the other end of each branch pipe is respectively communicated with the inner cavity of the flow distribution disc, the left end face of each flow distribution disc seals the inner cavity of the right end of the main pipe of the rotary pipe body, and the right end face of the flow distribution disc is communicated with the inner cavity of the left end of. The multi-stage structure can greatly reduce the radial size of the rotor under the condition of ensuring the same advance speed coefficient, so that the structure of the whole propeller is more compact, and the low torque and high rotation speed enable the internal flow field to flow at high speed, so that the propeller is more suitable for high-speed underwater propulsion.

Description

Multistage rotary pipe type pump jet propeller

Technical Field

The utility model belongs to mechanical equipment, in particular to propeller is spouted to multistage coil formula pump.

Background

The submarine has great significance for China sea defense, and the improvement of the navigational speed and the sonar stealth of the submarine are two important problems in the manufacturing process of the submarine. The navigation speed of the submarine is mainly realized by a pump jet propeller, while the traditional pump jet propeller inevitably has drag propeller resistance and discontinuous flow channel due to the existence of a propeller blade, and inevitably has blade tip leakage and vortex due to the gap between a blade tip and a guide pipe, and simultaneously generates tip vortex cavitation to intensify vibration and noise, thereby reducing the navigation speed and the sound receiving stealth, and being incapable of meeting the high-speed underwater propulsion.

Disclosure of Invention

An object of the utility model is to overcome above-mentioned technique not enough, provide a simple structure, can improve navigational speed and stealthy nature of sonar, satisfy the multistage coil type pump jet propeller of high-speed underwater propulsion demand.

The utility model provides a technical scheme that technical problem adopted is: the multistage spiral pipe type pump jet propeller comprises an outer conduit, a shaft seal ring and a rolling bearing, and is characterized in that the whole body of the outer conduit is streamline, the left end of the outer conduit is provided with a water inlet, the right end of the outer conduit is provided with a water outlet, a water inlet grid is arranged in the water inlet, a tail flow guide spray cone is arranged in the water outlet, the inner cavity of the tail flow guide spray cone is in a shape that the left end is small and the right end is large, the outer circumference of the left end of the outer conduit is provided with a guide cone, the outer wall of the guide cone is provided with a plurality of side gill holes which are inclined slotted holes, the inclined direction faces to the tail part of the right end, the inner cavity of the guide cone is provided with a water inlet flow guide cone, the inner cavity of the water inlet flow guide cone is in a shape that the left end is large and the right end is small, the inner cavity of the guide cone and the water inlet flow guide cone are fixedly welded with a plurality, an oil seal ring I and a rolling bearing I are sequentially arranged between an inner boss in the middle of an inner cavity of an outer conduit and an unwinding flow distribution pipe from left to right, a sleeve I is fixedly arranged on the outer circumference of the unwinding flow distribution pipe on the right side of the rolling bearing I, the left end face of the sleeve is in contact pressure with the right end face of an inner ring of the rolling bearing, the right end face of the sleeve is in contact pressure with the left end face of a magnetic stripe of a permanent magnet rotor, magnetic stripes of the permanent magnet rotor with N poles and S poles are alternately fixed on the outer circumference of the unwinding flow distribution pipe, a stator winding is fixedly arranged in the inner cavity of the outer conduit corresponding to the position of the magnetic stripe of the permanent magnet rotor, a motor consists of the magnetic stripe of the permanent magnet rotor and the stator winding, the right end of the unwinding flow distribution pipe for fixing the magnetic stripe of the permanent magnet rotor is welded and connected with a plurality of rotary pipe bodies, each rotary pipe body consists, one end of each branch pipe is respectively communicated with the main pipe, the other end of each branch pipe is respectively communicated with the inner cavity of the valve plate, the left end face of each valve plate seals the inner cavity of the right end of the main pipe of the rotary pipe body, the right end face of the valve plate is communicated with the inner cavity of the left end of the main pipe of the rotary pipe body connected with the right side, the right end of the rotary pipe body at the rightmost end is connected with the tail rectifying pipe in a welding mode, the tail rectifying pipe is arranged on the inner boss at the middle and right end of the inner cavity of the outer guide pipe, a shaft seal ring II and a rolling bearing II are sequentially arranged between the inner boss at the middle and right end of the inner cavity of the outer guide pipe body from right to left, a sleeve II is fixedly arranged on the outer circumference of the tail rectifying pipe between the rolling bearing II and the plurality of rotary pipe bodies, the left end face of the sleeve II is in contact pressure with the right end face of the.

The utility model has the advantages that: the multistage rotary pipe type pump jet propeller has a simple structure, and can eliminate tip vortex cavitation and greatly reduce the propelling resistance due to the adoption of a continuous flow channel and a non-overflowing surface on the inner wall of the outer conduit. The multi-stage structure can greatly reduce the radial size of the rotor under the condition of ensuring the same advance speed coefficient, so that the structure of the whole propeller is more compact, and the low torque and high rotation speed enable the internal flow field to flow at high speed, so that the propeller is more suitable for high-speed underwater propulsion.

Drawings

The following description is made in detail by way of example with reference to the accompanying drawings.

Fig. 1 is a sectional view of a multi-stage spiral pipe type pump jet propeller structure.

Fig. 2 is an enlarged view at i in fig. 1.

Fig. 3 is an enlarged view of fig. 1 at point ii.

In the figure, 1-water inlet grille; 2-side gill holes; 3-water inlet diversion cone; 4-flow guiding cone reinforcing rib plate; 5-unwinding the distributing pipe; 6-shaft seal ring I; 7, rolling bearing I; 8, sleeving a first sleeve; 9-stator winding; 10-permanent magnet rotor magnetic strip; 11-a rotating pipe body; 11-1-port plate; 11-2-branch pipe; 11-3-main tube; 12-an outer catheter; 12-1-a water inlet; 12-2-water outlet; 12-3-a guide cone; 13-tail rectifier tube; 14-tail flow guide spray cone; 15-shaft seal ring II; 16-rolling bearing II; and 17-sleeve II.

Detailed Description

In the embodiment, referring to the attached fig. 1-3, the whole external conduit 12 of the multi-stage coil type pump jet propeller is streamline, the left end of the external conduit 12 is provided with a water inlet 12-1, and the right end of the external conduit 12 is provided with a water outlet 12-2. The water inlet 12-1 is internally provided with a water inlet grid 1 for preventing foreign matters from entering an internal flow passage, the water outlet 12-2 is internally provided with a tail flow guide spray cone 14, and the inner cavity of the tail flow guide spray cone 14 is in a shape that the left end is small and the right end is large. The outer circumference of the left end of the outer guide pipe 12 is provided with a guide cone 12-3, the outer wall of the guide cone 12-3 is provided with a plurality of side gill holes 2, the side gill holes 2 are inclined slotted holes, the inclined direction faces the tail part of the right end, and the side gill holes 2 can ensure and increase water inflow, so that internal cavitation caused by insufficient water supply due to step-by-step pressurization is prevented. The water inlet guide cone 3 is arranged in the inner cavity of the guide cone 12-3, the inner cavity of the water inlet guide cone 3 is in the shape of being large at the left end and small at the right end, the inner cavity of the guide cone 12-3 and the water inlet guide cone 3 are fixedly welded by a plurality of guide cone reinforcing rib plates 4, and the right end of the water inlet guide cone 3 is inserted into the left end of the disrotatory flow distribution pipe 5 and keeps a gap with the disrotatory flow distribution pipe. The unwinding distributing pipe 5 is arranged on an inner boss in the middle of the inner cavity of the outer guide pipe 12, an oil seal ring I6 and a rolling bearing I7 are sequentially arranged between the inner boss in the middle of the inner cavity of the outer guide pipe 12 and the unwinding distributing pipe 5 from left to right, and a sleeve I8 is fixedly arranged on the outer circumference of the unwinding distributing pipe 5 on the right side of the rolling bearing I7. The left end face of the sleeve I8 is pressed on the right end face of the inner ring of the rolling bearing I7, the right end face of the sleeve I8 is pressed on the left end face of the permanent magnet rotor magnetic stripe 10, and the permanent magnet rotor magnetic stripes 10 of the N pole and the S pole are fixed on the outer circumference of the unwinding flow distribution pipe 5 in an interval mode. The stator winding 9 is fixedly arranged at the position of the inner cavity of the outer conduit 12 corresponding to the position of the magnetic strip 10 of the permanent magnet rotor, a gap is reserved between the magnetic strip 10 of the permanent magnet rotor and the stator winding 9, and the permanent magnet rotor magnetic strip 10 fixed on the outer circumference of the unwinding flow distribution pipe 5 and the stator winding 9 form a motor. The right end of an unwinding flow distribution pipe 5 fixedly provided with permanent magnet rotor magnetic stripes 10 is welded and connected with four rotary pipe bodies 11, each rotary pipe body 11 is respectively composed of a main pipe 11-3, a plurality of branch pipes 11-2 and a flow distribution disc 11-1, the main pipe 11-3 is uniformly distributed and provided with the plurality of branch pipes 11-2 along the circumferential direction, one end of each branch pipe 11-2 is respectively communicated with the main pipe 11-3, the other end of each branch pipe 11-2 is respectively communicated with the inner cavity of the flow distribution disc 11-1, the left end face of each flow distribution disc 11-1 seals the inner cavity of the right end of the main pipe 11-3 of the rotary pipe body 11 connected with the right side, and the right end face of the flow distribution disc 11-1 is communicated with the inner cavity of the left end of the main pipe 11-3 of the rotary. The right end of the coil body 11 at the rightmost end is connected with a tail rectifier tube 13 in a welding mode, the tail rectifier tube 13 is arranged on an inner boss at the middle right end in the inner cavity of the outer guide tube 12, a second shaft seal ring 15 and a second rolling bearing 16 are sequentially arranged between the inner boss at the middle right end in the inner cavity of the outer guide tube 12 and the tail rectifier tube 13 from right to left, and a second sleeve 17 is fixedly arranged on the outer circumference of the tail rectifier tube 13 between the second rolling bearing 16 and the plurality of coil bodies 11. The left end face of the second sleeve 17 is pressed on the right end face of the rotary pipe body 11, the right end face of the second sleeve 17 is pressed on the left end face of the inner ring of the second rolling bearing 16, and the right end of the tail rectifying pipe 13 is arranged in the inner cavity of the tail diversion spray cone 14.

The working process of the multistage rotary pipe type pump jet propeller comprises the following steps: when the rotor system works, the whole outer guide pipe 12 is required to be completely placed in water, the rotor system consisting of the disrotatory distributing pipe 5, the magnetic strips of the permanent magnet rotor 10, the four rotary pipe bodies 11 and the tail rectifying pipe 13 is electrified by the stator winding 9 to drive the magnetic strips of the permanent magnet rotor 10 to rotate, and therefore the whole rotor is driven to rotate. Under the driving of front guide negative pressure, referring to the direction indicated by an arrow in the figure, water enters the inner cavity of the guide cone 12-3 from the water inlet grid 1 of the water inlet 12-1, the water also can enter the inner cavity of the guide cone 12-3 from the lateral gill hole 2, the water enters the inner cavity of the guide cone 12-3, is gathered and collected by the water inlet guide cone 3, then is sucked into the disrotatory flow distribution pipe 5 for flow distribution and distribution, and then flows into the plurality of cyclone bodies 11 for pressurization. The principle of pressurization is that fluid rotates at high speed from the disrotatory distributing pipe 5 and the multistage rotating pipe body 11 to realize multistage pressurization, so that propulsive force is generated, the fluid flows through a flow channel in the disrotatory distributing pipe 5 and the multistage rotating pipe body 11, the inner wall of the outer guide pipe 12 is not an overflowing surface except the water inlet guide cone 3, water is thrown outwards by the centrifugal force of each branch pipe 11-2 of the plurality of rotating pipe bodies 11 after rotating, so that the water is driven to flow into the distributing disc 11-1 from the main pipe 11-3 through the branch pipe 11-2, and then next-stage pressurization is performed. After multi-stage pressurization, larger outlet pressure and higher flow rate can be obtained, the noise is reduced through the rectification of the tail rectifier tube 13, and then the noise is sprayed out through the tail diversion spray cone 14, so that the propelling force is realized, and the propelling force is the result of the combined action of the suction negative pressure of the water inlet 12-1 and the spraying pressure of the tail water outlet 12-2.

Claims (3)

1. A multi-stage rotary pipe type pump jet propeller comprises an outer guide pipe (12) and an unwinding flow distribution pipe (5), and is characterized in that a guide cone (12-3) is arranged on the outer circumference of the left end of the outer guide pipe (12), a plurality of side gill holes (2) are formed in the outer wall of the guide cone (12-3), a plurality of rotary pipe bodies (11) are connected to the right end of the unwinding flow distribution pipe (5), each rotary pipe body (11) is composed of a main pipe (11-3), a plurality of branch pipes (11-2) and a flow distribution disc (11-1), a plurality of branch pipes (11-2) are uniformly distributed and distributed on the main pipe (11-3) along the circumferential direction, one end of each branch pipe (11-2) is connected and communicated with the main pipe (11-3), the other ends of the branch pipes (11-2) are connected and communicated with the inner cavity of the flow distribution disc (11-1), the left end surface of each valve plate (11-1) seals the inner cavity of the right end of the main pipe (11-3) of the coil body (11), and the right end surface of the valve plate (11-1) is communicated with the inner cavity of the left end of the main pipe (11-3) of the coil body (11) connected with the right side.

2. The multistage rotary-pipe pump jet propeller as claimed in claim 1, wherein the left end of the outer conduit (12) is provided with a water inlet (12-1), the right end of the outer conduit (12) is provided with a water outlet (12-2), the water inlet (12-1) is internally provided with a water inlet grille (1), and the water outlet (12-2) is internally provided with a tail diversion nozzle cone (14).

3. The multistage rotary pipe type pump jet propeller according to claim 1, wherein a water inlet guide cone (3) is arranged in an inner cavity of the guide cone (12-3), the inner cavity of the water inlet guide cone (3) is in a shape of a large left end and a small right end, and the inner cavity of the guide cone (12-3) and the water inlet guide cone (3) are welded and fixed by a plurality of guide cone reinforcing rib plates (4).