CN214577207U - Multistage Tesla turbine - Google Patents

Abstract

A multistage tesla turbine comprising at least two tesla turbine units; the tesla turbine unit comprises: the device comprises a rotating shaft, at least two radial bearings and a shell arranged on the rotating shaft and the at least two radial bearings, wherein a medium inlet and a medium outlet are formed in the shell; the rotary tables are arranged in the shell and fixedly connected to the rotating shaft, a gap is formed between every two adjacent rotary tables in the rotary tables, and exhaust holes are uniformly distributed on each rotary table in the rotary tables around the center; at least two radial bearings are arranged on the rotating shaft. The medium outlet of the upper stage tesla turbine unit communicates with the medium inlet of the lower stage tesla turbine unit. The utility model discloses a multistage tesla turbine, the pressure drop ratio is high, reduces the pressure drop loss, and the system is overall efficient, and the gas after the compression can obtain make full use of, but the energy saving.

Description

Multistage Tesla turbine

Technical Field

The utility model belongs to the technical field of the turbine, concretely relates to multistage tesla turbine.

Background

A tesla turbine is a bladeless, fluid shear driven turbine, referred to as a bladeless turbine. Tesla turbines use boundary layer effects, where the fluid is influenced by viscous forces and forms a very thin boundary layer at the edge of the pipe wall or other object, where the velocity of a stationary surface is 0 and increases further from the surface. By using the effect, the fluid moving at high speed can drive a group of rotating discs to rotate. The mechanical efficiency of a tesla turbine can reach 95%, which is much higher than that of a conventional blade turbine.

However, the pressure drop ratio of the existing tesla turbine is difficult to break through 2, namely, the gas compressor pressurizes gas, and high-pressure gas has large pressure loss after acting on the turbine, so when the tesla turbine is used in systems such as power generation or heating, the thermal efficiency is not high, and energy waste is caused.

Disclosure of Invention

The technical solution problem of the utility model is that: the defects of the prior art are overcome, and the multistage Tesla turbine is provided, so that the problems of low pressure drop ratio, easy pressure loss and low system efficiency of the conventional Tesla turbine can be solved.

The technical solution of the utility model is that: a multistage tesla turbine comprising at least two tesla turbine units; the Tesla turbine unit comprises: the device comprises a rotating shaft, at least two radial bearings and a shell arranged on the rotating shaft and the at least two radial bearings, wherein a medium inlet and a medium outlet are formed in the shell; the rotating shafts are arranged on the rotating shafts, the rotating shafts are fixedly connected with the rotating shafts, gaps are formed between every two adjacent rotating disks in the rotating shafts, and exhaust holes are uniformly distributed around the center on each rotating disk in the rotating shafts; the at least two radial bearings are arranged on the rotating shaft; the medium outlet of the upper stage tesla turbine unit communicates with the medium inlet of the lower stage tesla turbine unit.

Further, each Tesla turbine unit comprises a motor, and a rotating shaft of the motor is connected with the rotating shaft through a coupling; or the rotating shaft of the motor is the rotating shaft.

Further, the motor is a generator or a starting and starting integrated motor.

Further, each tesla turbine unit comprises a thrust bearing.

Furthermore, two radial bearings are respectively positioned at the outer sides of the turntables at the two ends.

Further, at least two of the radial bearings and/or the thrust bearings are non-contact bearings.

Further, the medium inlet is provided with a nozzle.

Furthermore, spiral air grooves are formed in two side faces of the rotary table.

Further, the connecting position of the rotating shaft and the shell is sealed.

Further, the rotating disc is a disc.

Compared with the prior art, the utility model the advantage lie in:

1. the utility model discloses a multistage tesla turbine, the pressure drop relative altitude reduces the pressure drop loss, and the system is overall efficient.

2. The utility model discloses a multistage tesla turbine, the gas after the compression can obtain make full use of, but the energy saving.

3. The utility model discloses a multistage tesla turbine, the medium entry of each level tesla turbine unit sets up the nozzle, has increased the gas flow rate.

4. For serial-type tesla turbine axle clearance at the micron level, the assembly difficulty hardly guarantees the axiality, assembles the condition of operation complicacy, the utility model discloses a multistage tesla turbine easily guarantees the axiality, avoids the error accumulation, and the assembly is simple.

5. The multi-stage Tesla turbine of the utility model is especially suitable for small motors (such as 1KW), and has higher dimensional precision; the manufacturing work and the assembly process are simple; but the modularization production, production efficiency is high.

6. The utility model discloses a multistage tesla turbine, carousel both sides face set up spiral air groove, realize the quick through-flow of carousel both sides air, both can conduct gas, can prevent air blockage again, gather.

Drawings

FIG. 1 is a schematic structural view of a multi-stage Tesla turbine according to the present invention;

FIG. 2 is a schematic view of a single Tesla turbine unit in a multi-stage Tesla turbine according to the present invention;

FIG. 3 is a schematic illustration of the turbine inlet and outlet path in the top view of FIG. 1;

fig. 4 is a schematic diagram of the multi-stage tesla turbine of the present invention with air slots on the rotating disk.

Reference numerals:

110-shaft, 160-thrust disk, 120-housing, 170-media inlet, 180-media outlet, 191-rotating disk, 192-exhaust hole, 193-gasket, 194-air groove, 195-elastic retainer, 196-sleeve, 130-radial bearing, 103-motor, 150-thrust bearing.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

1-4, a multi-stage Tesla turbine comprising at least two Tesla turbine units; the Tesla turbine unit comprises: the rotating shaft 110, at least two radial bearings 130 and the housing 120 arranged on the rotating shaft 110 and the at least two radial bearings 130, wherein the housing 120 is provided with a medium inlet 170 and a medium outlet 180; a plurality of turntables 191 arranged in the housing 120, the plurality of turntables 191 are fixedly connected to the rotating shaft 110, a gap is arranged between every two adjacent turntables 191 in the plurality of turntables 191, and exhaust holes 192 are uniformly distributed around the center on each turntable 191 in the plurality of turntables 191; the at least two radial bearings 130 are disposed on the rotating shaft 110; the media outlet 180 of the previous stage tesla turbine unit communicates with the media inlet 170 of the next stage tesla turbine unit.

The utility model discloses a multistage tesla turbine's theory of operation as follows: the high velocity fluid media enters the interior of the first stage tesla turbine housing 120 through the media inlet 170 provided in the housing 120 and into the gap between adjacent rotor discs 191. Due to the fluid boundary effect, the fluid medium drives the rotating disk 191 to rotate at high speed, thereby driving the rotating shaft 110 to rotate. The fluid medium passes through the exhaust holes 192 of each of the rotating disks 191 in turn and finally exits the housing 120 through the medium outlet 180 provided in the housing 120, passing through the conduit into the medium inlet 170 … … of the next stage tesla turbine unit until exiting from the medium outlet 180 of the last stage tesla turbine unit.

Preferably, the media outlet 180 of the previous stage tesla turbine unit is connected to the media inlet 170 of the next stage tesla turbine unit by a pipe.

Preferably, the media inlet 170 of each stage of tesla turbine units is provided with a nozzle to increase the gas flow rate.

Preferably, the connection position of the rotating shaft 110 and the housing 120 is sealed, so as to prevent the working medium from leaking.

Preferably, the rotating shaft 110 is supported in a stator (not shown) by at least one pair of radial bearings 130.

Preferably, the turntable 191 is a circular disk.

Preferably, each tesla turbine unit is provided with a motor 103, and a rotating shaft of the motor 103 is connected with the rotating shaft 110 through a coupling; alternatively, the rotating shaft of the motor 103 is the rotating shaft 110, that is, the rotating shaft of the motor 103 is coaxial with the rotating shaft 110 of the multistage tesla turbine. The multistage tesla turbine of the present invention is applicable to micro gas turbines.

Preferably, the motor 103 is a generator, and the rotation shaft 110 rotates to drive the rotation shaft of the motor 103 to rotate so as to realize motor power generation.

Further preferably, the motor 103 is a start-up integrated motor, at this time, when the tesla turbine unit is initially started, the motor 103 may be started in a start mode to rotate the rotating shaft 110 of the tesla turbine unit, and when the rotating speed of the tesla turbine unit is increased to a preset rotating speed, the operating mode of the motor 103 may be switched to a power generation mode.

Preferably, each tesla turbine unit comprises a thrust bearing 150, said thrust bearing 150 comprising a thrust disc 160 and a stator, said thrust disc 160 being arranged on said rotating shaft 110; the thrust bearing 150 is a bearing for restricting the movement of the rotating shaft 110 in the axial direction, and the radial bearing 130 is a bearing for restricting the movement of the rotating shaft in the radial direction.

It is further preferred that the at least two radial bearings 130 and/or the thrust bearing 150 are non-contact bearings, such as air bearings, magnetic bearings, gas-magnetic hybrid bearings, etc.

Preferably, two radial bearings 130 are located outside the two end turntables, respectively.

Preferably, the air discharge holes 192 on each disk 191 are coaxially arranged.

Preferably, the rotary plate 191 is fixed to the rotary shaft 110 by a key connection or the like.

Preferably, a spacer 193 is disposed between two adjacent rotating discs 191, and the spacer 193 is used for adjusting the size of the gap between two adjacent rotating discs 191.

Preferably, the turntable 191 is made of steel or carbon fiber material or high-temperature resistant epoxy resin.

Preferably, spiral air grooves 194 are formed in two side faces of the rotary plate 191 to achieve rapid through flow of air on two sides of the rotary plate 191, so that air can be conducted, and air blockage and accumulation can be prevented.

Further preferably, the air grooves 194 may be formed by forging, rolling, etching, or stamping.

The assembling method of the multistage Tesla turbine comprises the following steps:

s100), assembling a tesla turbine unit:

s110), sleeving a rotary disc 191 provided with a Tesla turbine unit on the rotating shaft 110 for fixing, and then sleeving a gasket 193;

s120), repeating the step 110), and sequentially sleeving a preset number of turntables 191 until the last turntable 191 is sleeved; the end part of the last rotary disc 191 is fixed through an elastic retainer ring 195 to limit the axial displacement of the rotary disc 191;

s130), covering the shell 120 on the turntable 191 and sealing;

s140), rotating the Tesla turbine of the current stage, and detecting the coaxiality, the deviation of parallelism and the vibration amplitude among the turntables 191;

s150), if the coaxiality, the deviation of the parallelism and the vibration amplitude among the rotary discs 191 detected in the step S140 exceed the preset values, the rotary disc 191 assembled finally is taken down, the step S140 and the step S150 are repeated until the coaxiality, the deviation of the parallelism and the vibration amplitude among the rotary discs 191 detected are in the preset value range, and the next stage Tesla turbine unit is assembled;

s200), repeating step S100 until the assembly of a predetermined number of tesla turbines is completed.

S300), communicating the medium outlet of the previous stage tesla turbine unit with the medium inlet of the next stage tesla turbine unit.

Preferably, the multistage tesla turbine comprises a motor 103, and a rotating shaft of the motor 103 is connected with the rotating shaft 110 through a coupling; or, the rotating shaft of the motor 103 is the rotating shaft 110, the assembling method of the multistage tesla turbine includes the step S101,

when the rotating shaft of the motor 103 is connected with the rotating shaft 110 through a coupling,

step S101), the rotating shaft 110 and the motor 103 are connected into a whole through a coupler, and a radial bearing 130 is arranged at the motor end;

when the rotating shaft of the motor 103 is the rotating shaft 110, a radial bearing 130 is installed at the rear end of the last rotating disc close to the motor 103, the motor 103 is installed on the rotating shaft 110, and the radial bearing 130 is located between the last rotating disc and the motor 103.

Meanwhile, in step S110, one of the turntables 191 to which the tesla turbine unit is assembled is fitted over the rotating shaft 110 to be fixed, and then the spacer 193 is fitted, and the first one of the turntables is a turntable close to the motor 103.

Preferably, after step S300 is completed, a protective cover may be covered outside the whole machine, and a reserved opening is left on the protective cover. The reserved opening is used for connecting with the outside, such as connecting pipelines or lines.

Preferably, in step 100, the fixing mode between the rotating disc 191 and the rotating shaft 110 can be selected from a key connection, and two ends are limited by the sleeve 196. Specifically, referring to fig. 1, for each stage of tesla turbine unit, the right side of the middle part of the rightmost turntable 191 is provided with an integrally formed sleeve 196, and the right end of the sleeve 196 abuts against the right shoulder of the rotating shaft 110; an integrally formed sleeve 196 is arranged on the left side of the middle part of the leftmost rotating disc 191, and an elastic check ring 195 can be arranged on the left side of the sleeve 196 for axial limiting.

Preferably, the number of discs 191 in each stage of the tesla turbine unit may be equal or individually equal or unequal.

The utility model discloses a multistage tesla turbine accessible increases the quantity increase airflow of carousel 191, through increasing the progression increase pressure ratio.

Assuming that the gas pressure at the working medium inlet is 20 times of atmospheric pressure, and the gas pressure can be reduced by 2 times by each stage of Tesla turbine unit, the discharge pressure can be close to the atmospheric pressure by 4-5 stages of Tesla turbine units, and the pressure drop loss is very small.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A multistage tesla turbine comprising at least two tesla turbine units;

the Tesla turbine unit comprises: the device comprises a rotating shaft, at least two radial bearings and a shell arranged on the rotating shaft and the at least two radial bearings, wherein a medium inlet and a medium outlet are formed in the shell; the rotating shafts are arranged on the rotating shafts, the rotating shafts are fixedly connected with the rotating shafts, gaps are formed between every two adjacent rotating disks in the rotating shafts, and exhaust holes are uniformly distributed around the center on each rotating disk in the rotating shafts; the at least two radial bearings are arranged on the rotating shaft; the medium outlet of the upper stage tesla turbine unit communicates with the medium inlet of the lower stage tesla turbine unit.

2. The multi-stage tesla turbine of claim 1, wherein each tesla turbine unit comprises an electric motor having a shaft coupled to the shaft by a coupling; alternatively, the first and second electrodes may be,

the rotating shaft of the motor is the rotating shaft.

3. The multi-stage tesla turbine of claim 2, wherein the electric machine is a generator or a start-up integrated electric machine.

4. The multi-stage tesla turbine of claim 1, wherein each tesla turbine unit comprises a thrust bearing.

5. The multi-stage tesla turbine of claim 1, wherein two radial bearings are located outside of the two end turntables, respectively.

6. The multistage tesla turbine according to claim 1 or 4, wherein at least two radial bearings and/or thrust bearings are non-contact bearings.

7. The multi-stage tesla turbine of claim 1, wherein the media inlet is provided with a nozzle.

8. The multi-stage tesla turbine of claim 1 wherein helical air slots are provided on both sides of the disk.

9. The multi-stage tesla turbine of claim 1, wherein the shaft is sealed from a housing connection location.

10. The multi-stage tesla turbine of claim 1, wherein the rotating disk is a disk.

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