Radial water inlet turbine propeller

Abstract

The invention relates to the technical field of ship propulsion, in particular to a radial water inflow turbine propeller. Comprising a turbine and a driving device, the turbine is of a hollow structure formed by connecting a plurality of uniformly distributed turbine blades between two discs, a nozzle is arranged in the center of the front-end disc, and a turbine shaft which is integrated with the rear-end disc and is provided with an inner hole is arranged in the center of the outer side of the rear-end disc; the driving device is a conventional device, the outer side of a driving shaft of the driving device is sleeved with a shaft sleeve, the driving shaft is inserted into an inner hole of a turbine shaft, the driving shaft extends out of a disc at the rear end of a turbine and enters an inner cavity of the turbine, and the turbine and the driving shaft are fixed through a turbine lock nut. The front end of the nozzle is a round tube, and the rear end is a conical hole which is communicated with an inner hole of the round tube at the front end. The turbine blades are arc-shaped long-strip pieces, are integrated with the turbine front-end disc and the turbine rear-end disc and are arranged on the edges of the turbine front-end disc and the turbine rear-end disc, the middles of the turbine blades protrude outwards, the outward protruding height of the front sides of the turbine blades is larger than the outward protruding height of the rear sides of the turbine blades, and protruding arc-shaped slopes are arranged between the front sides and the rear sides of the turbine blades.

Description

Technical Field

[0001] The invention relates to the technical field of ship propulsion, and in particular to a radial water-intake turbine propeller. Background Art

[0002] With the development of the shipbuilding industry, in order to improve the working efficiency of ship propulsion devices, people began to study the use of pump water jet propulsion devices. Compared with propeller propulsion devices, pump propulsion has many advantages, which will not be described in detail here.

[0003] There is a key problem in the design process of pump-push and propeller propulsion - seawater cavitation. Cavitation is inevitable, which causes the rotation speed of pumps and propellers to be very low, and the transmission shaft diameter to be large, which affects the efficiency improvement. At the same time, the navigation speed of the ship is also limited. Therefore, pump-push has not been widely promoted on surface ships.

[0004] After several years of research and exploration, we finally found a new propeller design method. Its working principle is the same as that of a pump-push, but the design method of its impeller is completely different from that of a pump-push impeller.

[0005] The pump structure type commonly used in current pump-propellants is axial flow (similar in shape to a propeller). Some pumps use mixed flow structure, which significantly improves the efficiency of the pump, but because cavitation cannot be overcome, it is only used on submarines.

[0006] The object of the present invention is to provide a radial water inlet turbine propeller to solve the above-mentioned cavitation problem. Summary of the invention

[0007] The object of the present invention is to provide a radial water inlet turbine propeller to solve the cavitation problem mentioned in the background technology.

[0008] The new design method is tentatively named turbine propulsion. The biggest difference between it and the traditional pump-push design is that the way the liquid enters the impeller has changed. The traditional method is that the liquid enters the impeller from the axial direction, and after obtaining energy, it is ejected from the back, thereby generating a reaction force to propel the ship forward. The liquid flow of turbine propulsion enters the turbine from the circumferential direction, works on the liquid through the turbine, and then ejects backward to obtain thrust.

[0009] When the turbine is designed, the liquid is always in the process of supercharging after entering the turbine, eliminating the front-end pressure reduction stage in the operation of the traditional pump impeller, so that there will be no cavitation damage in the propeller. When the ship's forward speed is above 50 knots, the liquid (seawater) vaporizes, and the bubbles formed will be outside the propeller, and it will not enter the turbine. Therefore, when designing a turbine thruster, the speed of the turbine can be increased, the propulsion efficiency can be improved, and the diameter of the drive shaft can be reduced.

[0010] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a radial water-inlet turbine propeller, including a turbine and a driving device; the turbine is a hollow structure in which two discs are connected by a number of evenly distributed turbine blades, the center of the front disc is a nozzle, and the center of the outer side of the rear disc is provided with a turbine shaft with an inner hole which is an integral structure with the rear disc; the driving device is a conventional driving system, and a shaft sleeve is mounted on the outer side of the driving shaft, the driving shaft is inserted into the inner hole of the turbine shaft of the turbine, the end of the turbine shaft is close to the shaft sleeve, the driving shaft protrudes from the rear end disc of the turbine and enters the inner cavity of the turbine, and the turbine and the driving shaft are fixed with a turbine lock nut.

[0011] Preferably, the front end of the nozzle is a circular tube, and the rear end is a conical hole, and the conical hole is connected to the inner hole of the circular tube at the front end.

[0012] Preferably, the turbine blade is an arc-shaped long strip, which is an integral structure with the front end disc and the rear end disc of the turbine, and is arranged on the edges of the front end disc and the rear end disc of the turbine. The middle of the turbine blade bulges outward, the height of the outward bulge of the front side of the turbine blade is greater than the height of the outward bulge of the rear side, and the part between the front and rear sides of the turbine blade is a raised arc-shaped slope.

[0013] The beneficial effects of the present invention are as follows: the liquid is in the process of being pressurized after entering the turbine, eliminating the front-end pressure reduction stage in the operation of the traditional pump impeller, so that no cavitation damage will occur in the propeller. When the ship's forward speed is above 50 knots, the liquid (seawater) vaporizes, and the bubbles formed will be outside the propeller and will not enter the turbine. The cavitation loss of the blades is avoided, the speed of the turbine can be increased, the propulsion efficiency can be improved, the diameter of the transmission shaft can be reduced, and the life of the turbine can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 It is a schematic diagram of the structure of the present invention.

[0015] Attached Figure 2 For attachment Figure 1 AA section view.

[0016] Attached Figure 3 For attachment Figure 2 BB section expansion diagram.

[0017] Attached Figure 1 —3, turbine 1, turbine lock nut 2, drive shaft 3, low pressure area 4, water inlet direction 5, water spray port 6, turbine rotation direction 7, turbine blades 8, nozzle 9, turbine shaft 10, drive device 11, and shaft sleeve 12. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] Attached Figure 1 As shown in FIG. 3 , a radial water-inlet turbine propeller comprises a turbine 1 and a drive device 11; the turbine 1 is a hollow structure in which two disks are connected by a plurality of evenly distributed turbine blades 8, the center of the front disk is a nozzle 9, and the center of the outer side of the rear disk is provided with a turbine shaft 10 which is an integral structure with the rear disk and has an inner hole; the drive device 11 is a conventional drive system, and a shaft sleeve 12 is mounted on the outer side of the drive shaft 3, and the drive shaft 3 is inserted into the inner hole of the turbine shaft 10 of the turbine 1, and the end of the turbine shaft is close to the shaft sleeve 12, and the drive shaft 3 protrudes out of the rear disk of the turbine 1 and enters the inner cavity of the turbine, and the turbine 1 and the drive shaft 3 are fixed by a turbine lock nut 2.

[0020] The front end of the nozzle is a circular tube, and the rear end is a conical hole, which is communicated with the inner hole of the circular tube at the front end.

[0021] The turbine blade 8 is an arc-shaped long strip, which is an integral structure with the front end disk and the rear end disk of the turbine 1, and is arranged at the edges of the front end disk and the rear end disk of the turbine 1. The middle of the turbine blade 8 bulges outward, and the height of the outward bulge of the front side of the turbine blade 8 is greater than the height of the outward bulge of the rear side. The part between the front and rear sides of the turbine blade 8 is a raised arc-shaped slope.

[0022] When the turbine propeller is running, water enters the center of the turbine from the radial gap between the turbine blades 8 along the water inlet direction 5, and the turbine rotates along the turbine rotation direction 7. After entering the turbine, the water is pressurized by the turbine blades 8 and sprayed out from the water nozzle 6. The reaction force pushes the ship forward. Since the water has been in the process of supercharging after entering the turbine, the front-end pressure reduction stage in the operation of the traditional pump impeller is eliminated, so that there will be no cavitation damage in the propeller. When the forward speed of the ship is above 50 knots, the liquid (seawater) vaporizes, and the bubbles formed will be in the external low-pressure area 4 of the propeller, and it will not enter the inside of the turbine. Therefore, the turbine thruster can increase the speed of the turbine, improve the propulsion efficiency, and reduce the diameter of the drive shaft.

[0023] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A radial water inlet turbine propeller, characterized in that: It includes a turbine and a driving device; the turbine is a hollow structure with two discs connected by a number of evenly distributed turbine blades, the center of the front disc is a nozzle, and the center of the outer side of the rear disc is provided with a turbine shaft with an inner hole which is an integral structure with the rear disc; the driving device is a conventional driving system, the outer side of the driving shaft is provided with a shaft sleeve, the driving shaft is inserted into the inner hole of the turbine shaft of the turbine, the end of the turbine shaft is close to the shaft sleeve, the driving shaft protrudes out of the rear disc of the turbine and enters the inner cavity of the turbine, and the turbine and the driving shaft are fixed with a turbine lock nut.

2. A radial water inlet turbine propeller according to claim 1, characterized in that: The front end of the nozzle is a circular tube, and the rear end is a conical hole, which is communicated with the inner hole of the circular tube at the front end.

3. The radial water inlet turbine propeller according to claim 1, characterized in that: The turbine blade is an arc-shaped long strip, which is an integral structure with the front end disc and the rear end disc of the turbine, and is arranged at the edges of the front end disc and the rear end disc of the turbine. The middle of the turbine blade bulges outward, the height of the outward bulge of the front side of the turbine blade is greater than the height of the outward bulge of the rear side, and the part between the front side and the rear side of the turbine blade is a raised arc-shaped slope.

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