CN-121993261-A - Novel tesla turbine

Abstract

The invention discloses a novel Tesla turbine, belongs to the technical field of fluid machinery, and aims to solve the technical problems of low energy conversion efficiency, insufficient torque, high processing and manufacturing difficulty and limited application range of the existing Tesla turbine. The turbine comprises a rotor, a rotating shaft and a stator, wherein the stator is provided with a working medium inlet and a working medium outlet, the rotor consists of a plurality of discs and blades, and a fluid outlet is formed in the rotor, the core improvement is that the thickness of the rotor discs is gradually increased along the radial direction, the blades are arranged between the discs, the inner surface of the stator is coupled with the shape of the discs, and meanwhile, a modular design and a 3D printing or pressure processing and brazing combined manufacturing mode is adopted. The invention can optimize flow field distribution, reduce energy loss, obviously improve torque and power under low rotation speed and high load working conditions, widen applicable working medium and working condition range, simplify processing and installation processes, improve equipment operation stability and service life, can be used as a turbine or a pump, and has good practicality and popularization value.

Inventors

• WU FAN

Assignees

• 上海电萌科技有限公司

Dates

Publication Date

20260508

Application Date

20260331

Claims (7)

1. 1. The novel Tesla turbine is characterized by comprising a rotor, a rotating shaft and a stator, wherein a working medium inlet and a working medium outlet are formed in the stator, the rotor consists of a plurality of discs and blades, and a fluid outlet is formed in the rotor.
2. 2. The novel tesla turbine of claim 1, wherein the rotor disk is comprised of a plurality of disk units, with vanes disposed between adjacent disk units.
3. 3. The tesla turbine of claim 2, wherein the rotor is manufactured by 3D printing or by one of a number of pressure formed disk units brazing, the blades being integrally machined with the disk units, each disk unit being accompanied by a set of blades except for the outermost disk unit.
4. 4. The tesla turbine of claim 1, wherein the thickness of the discs constituting the rotor is set gradually, and the cross-sectional profile equation of the discs is determined according to the principles of hydrodynamics and aerodynamics, using the one-dimensional steady flow bernoulli equation: 。
5. 5. A tesla turbine according to claim 1, wherein the turbine is operable as a pump, the roles of fluid inlet and outlet being interchanged when used as a pump.
6. 6. The tesla turbine of claim 1, wherein the number of discs making up the rotor is determined by the size of the working fluid inlet on the stator and the hydrodynamic equation.
7. 7. Tesla turbine according to claim 1, wherein the rotor is provided with a working fluid outflow opening nearer to the axis of rotation.

Description

Novel tesla turbine Technical Field The invention relates to the technical field of fluid machinery, in particular to a novel Tesla turbine. Background Tesla 1913 discloses a radial flow turbine, i.e., a Tesla turbine, which relies on friction between fluid and solids and boundary layer effects to perform work, and which was originally designed as a vaneless structure. The Tesla turbine has the characteristics of simple structure, relatively low manufacturing tolerance requirement and excellent sealing performance, and fluid can generate pressure gradient positively related to the square flow velocity in the operation process, and can still normally operate under the working condition that solid particles are mixed in the working medium. In the prior art, WO2012122940A1 discloses a Tesla turbine with a nozzle close to a shaft and a rotor arranged on the outer side, the structure has the defect of larger flow path loss, CN201820054065.8 discloses a Tesla turbine with variable disc spacing, which makes local improvement on the turbine structure, and US2002/0182054A1 discloses a Tesla turbine with a working surface established by utilizing the edge of a blade, and attempts are made to optimize the performance of the turbine through the blade. Although the existing tesla turbine and related improvement scheme have the characteristics, the technical problems of relatively low energy conversion efficiency, insufficient torque, high processing and manufacturing difficulty and the like generally exist, and the application and popularization of the tesla turbine under more working conditions are limited, so that further structural optimization and improvement of the tesla turbine are needed. Disclosure of Invention The invention aims to provide a novel Tesla turbine. In order to achieve the above purpose, the present invention provides the following technical solutions: a novel Tesla turbine comprises a rotor, a rotating shaft and a stator, wherein a working medium inlet and a working medium outlet are formed in the stator, the rotor consists of a plurality of discs and blades, and a fluid outlet is formed in the rotor. Specifically, the disc of the rotor consists of a plurality of disc units, and blades are arranged between two adjacent disc units. Specifically, the rotor is manufactured by 3D printing or one of brazing of a plurality of disc units subjected to pressure processing, the blades and the disc units are integrally processed, and each disc unit is attached with a group of blades except for the outermost disc unit. Specifically, the thickness of the disc forming the rotor is gradually changed, and the section outline equation of the disc is determined according to the principles of fluid mechanics and gas dynamics. In particular, the turbine may be used as a pump, with the fluid inlet and outlet functions being interchanged when the pump is in use. Specifically, the number of discs constituting the rotor is determined by the size of the working medium inlet on the stator and the hydrodynamic equation. Specifically, the rotor is provided with a working medium outflow port at a position close to the rotating shaft. The invention has the beneficial effects that: The variable thickness disc structure of the invention can fully utilize the acting capability of boundary layer gas, improve the acting capability of gas in an outlet area, remarkably improve the torque output under the working conditions of low rotation speed and high load, simultaneously improve the power in the high load, solve the problem of insufficient torque and limited power of the existing Tesla turbine, reduce the phenomena of fluid leakage, vortex and wall flow removal by optimizing the shape of a runner and ensuring the width of the runner to be uniform, reduce various energy losses, improve the conversion efficiency of the energy of the material into mechanical energy, adapt to the working condition of gas with the number of the Markov less than 1, adapt to different working requirements by adopting a modularized combination design, and can be used as a pump at the same time to further widen the application scene of equipment. The stator inlet flange can be directly abutted to a standard pipeline without an additional adapter, the rotor adopts a combination mode of 3D printing or pressure processing and brazing, the problem of processing deviation of thin discs and small-gap blades is solved, the processing difficulty is reduced, the processing precision is ensured, meanwhile, the installation process is simplified, the symmetrical structure of the stator and the rotor and the uniform design of a flow channel can be ensured, the flow field is uniformly distributed, vibration and bias current in the running process of equipment are reduced, and the stability and the service life of the long-term running of the equipment are improved. For the liquid working medium, the flow passage with the thickness being changed can prolong the flow str