CN107503806B - Turbine engine - Google Patents
Turbine engine Download PDFInfo
- Publication number
- CN107503806B CN107503806B CN201710744246.3A CN201710744246A CN107503806B CN 107503806 B CN107503806 B CN 107503806B CN 201710744246 A CN201710744246 A CN 201710744246A CN 107503806 B CN107503806 B CN 107503806B
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- Prior art keywords
- turbine
- rotor shaft
- working medium
- installation space
- permanent magnet
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- 238000009434 installation Methods 0.000 claims abstract description 60
- 239000000725 suspension Substances 0.000 claims abstract description 45
- 238000006073 displacement reaction Methods 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims description 29
- 239000007788 liquid Substances 0.000 claims description 28
- 238000001816 cooling Methods 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 9
- 239000002918 waste heat Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000005339 levitation Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
Abstract
The invention discloses a turbine, comprising: the motor casing, the volute and the working medium pump casing; the stator assembly is arranged on the inner wall of the motor shell; a rotor shaft; the front radial permanent magnet bias magnetic suspension bearing and the rear radial permanent magnet bias magnetic suspension bearing are arranged on the motor casing to support the rotor shaft; the axial permanent magnet biased magnetic suspension bearing is arranged on the motor shell to limit the axial displacement of the rotor shaft; the expansion turbine is positioned in the turbine working chamber, and gaseous working medium enters the turbine working chamber from the air inlet channel and is discharged from the exhaust channel after acting on the expansion turbine; the centrifugal impeller is arranged at the front end of the rotor shaft of the working medium pump and is positioned in the third installation space. The turbine according to the invention is simple in construction, low in cost and high in thermoelectric efficiency.
Description
Technical Field
The invention relates to the technical field of low-temperature waste heat recovery power generation, in particular to a turbine.
Background
In the field of low-grade waste heat recovery, the organic Rankine cycle technology is one of main heat-power (electricity) technologies, and is simplified in system and high in efficiency compared with the traditional steam Rankine cycle power generation technology, but the efficiency of low-grade waste heat recovery equipment is still low, the investment recovery period is long, and the organic Rankine cycle technology is one of main factors limiting the development of the low-grade waste heat recovery power generation industry.
The existing organic Rankine cycle system for generating power by adopting a magnetic suspension turbine expander improves the efficiency and service life of the expander, but the service life and efficiency of an auxiliary machine are still low, so that the total thermoelectric efficiency of the system is low, particularly a cycle working medium pump, if the magnetic suspension centrifugal working medium pump is adopted, the power consumption is high, the price is high, and if the common working medium pump is adopted, the power consumption is high, the price is high, the service life is short, and the maintenance cost is high.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. The invention therefore proposes a turbine which is simple in construction, low in cost and high in thermoelectric efficiency.
The turbine according to the invention comprises: the motor comprises a motor shell, a volute and a working medium pump shell, wherein the motor shell defines a first installation space, the volute defines a second installation space, the working medium pump shell defines a third installation space, the first installation space is separated from the second installation space at intervals, and the first installation space is separated from the third installation space;
stator module, stator module sets up on the inner wall of motor casing just stator module includes: a stator core and a stator coil wound on the stator core;
a rotor shaft, the rotor shaft comprising: the working medium pump rotor shaft, the motor rotor shaft and the turbine rotor shaft are sequentially connected from front to back, the front end of the working medium pump rotor shaft is positioned in the third installation space, the motor rotor shaft is positioned in the first installation space, the rear end of the turbine rotor shaft is positioned in the second installation space, a permanent magnet iron core is embedded in the motor shaft, and the permanent magnet iron core is opposite to the stator assembly;
the front radial permanent magnet offset magnetic suspension bearing is arranged on the motor shell and is opposite to the working medium pump rotor shaft so as to support the working medium pump rotor shaft on the motor shell, and the rear radial permanent magnet offset magnetic suspension bearing is arranged on the motor shell and is opposite to the turbine rotor shaft so as to support the turbine rotor shaft on the motor shell;
the axial permanent magnet biased magnetic suspension bearing is arranged at the front end of the motor casing to limit the axial displacement of the rotor shaft;
an expansion turbine provided at a rear end of the turbine rotor shaft and located in the second installation space, the second installation space including: the expansion turbine is positioned in the turbine working chamber, and gaseous working medium enters the turbine working chamber from the air inlet channel and is discharged from the exhaust channel after acting on the expansion turbine;
the centrifugal impeller is arranged at the front end of the rotor shaft of the working medium pump and is positioned in the third installation space, the centrifugal impeller is suitable for pressurizing working medium discharged from the exhaust channel, the third installation space is provided with a working medium pump inlet and a working medium pump outlet, the working medium pump inlet is communicated with the exhaust channel, and the working medium pump outlet is communicated with the air inlet channel.
According to the turbine, the rotor shaft of the working medium pump, the rotor shaft of the motor and the rotor shaft of the turbine are integrated, so that the expansion turbine can directly drive the centrifugal impeller of the working medium pump, the step of supplying electric quantity generated by the generator to the motor of the working medium pump and driving the working medium pump to rotate by the motor is omitted, unnecessary loss in the energy conversion process from heat energy to electric energy and from electric energy to mechanical energy is avoided, and the thermoelectric efficiency of the turbine is remarkably improved.
According to one embodiment of the invention, the motor housing, the volute and the working fluid pump housing are all integrally formed.
According to one embodiment of the invention, the motor housing is provided with cooling channels for cooling the stator assembly and a motor controller in the upper part of the motor housing.
According to one embodiment of the invention, the inlet of the cooling channel is connected to the working fluid pump outlet and the outlet of the cooling channel is connected to the exhaust channel.
According to one embodiment of the invention, a condenser is arranged between the exhaust channel and the inlet of the working medium pump.
According to one embodiment of the invention, an evaporator is arranged between the working medium pump outlet and the air inlet channel.
According to one embodiment of the invention, a gas-liquid separator is arranged between the evaporator and the air inlet channel, the gas-liquid separator is provided with an air inlet, an air outlet and a liquid outlet, the air inlet is connected with the outlet of the evaporator, the air outlet is connected with the air inlet channel, and the liquid outlet is connected with the inlet of the evaporator.
According to one embodiment of the invention, a working medium bypass adjusting mechanism is further arranged between the inlet of the evaporator and the outlet of the condenser.
According to one embodiment of the invention, the turbine further comprises: the emergency power supply device is connected with the stator coil, and when the power grid is suddenly powered off, residual kinetic energy of the turbine is utilized to generate power so as to supply power for the front radial permanent magnet bias magnetic suspension bearing, the rear radial permanent magnet bias magnetic suspension bearing and the axial permanent magnet bias magnetic suspension bearing.
According to one embodiment of the invention, a first sealing structure is arranged between the first installation space and the second installation space, and a second sealing structure is arranged between the first installation space and the third installation space.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of a turbine according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of an axial permanent magnet biased magnetic bearing according to an embodiment of the present invention;
FIG. 3 is a schematic illustration of a front radial permanent magnet biased magnetic bearing according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the operation of a turbine according to an embodiment of the present invention.
Reference numerals:
the turbine 100 is configured to operate in a substantially parallel manner,
a motor housing 111, a first installation space 101, a cooling passage 104, a lower outlet 105, a scroll 112, a second installation space 102, an intake passage 102a, a turbine working chamber 102b, an exhaust passage 102c, a working fluid pump housing 113, a third installation space 103,
the stator assembly 120 is configured such that,
rotor shaft, motor rotor shaft 131, permanent magnet core 131a, turbine rotor shaft 132, working medium pump rotor shaft 133,
front radial permanent magnet biased magnetic bearing 141, rear radial permanent magnet biased magnetic bearing 142,
axial permanent magnet biased magnetic bearing 150, expansion turbine 160, centrifugal impeller 170,
a condenser 181, an evaporator 182, a gas-liquid separator 183, a working medium bypass adjusting mechanism 184,
a first sealing structure 191 and a second sealing structure 192.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The turbine 100 of the embodiment of the present invention is described in detail below with reference to fig. 1 to 4.
The turbine 100 according to an embodiment of the present invention may include a motor housing 111, a scroll 112, a working fluid pump housing 113, a stator assembly 120, a rotor shaft, a forward radial permanent magnet offset magnetic suspension bearing 141, an aft radial permanent magnet offset magnetic suspension bearing 142, an axial permanent magnet offset magnetic suspension bearing 150, an expansion turbine 160, and a centrifugal impeller 170.
1-3, motor housing 111 defines a first mounting space 101, scroll 112 defines a second mounting space 102, and working fluid pump housing 113 defines a third mounting space 103. That is, the first installation space 101 and the second installation space 102 are not communicated with each other, and the first installation space 101 and the third installation space 103 are not communicated with each other. The working medium in the second installation space 102 and the third installation space 103 does not enter the first installation space 101 to affect the stable operation of the parts in the first installation space 101.
The stator assembly 120 is disposed on an inner wall of the motor case 111, and the stator assembly 120 includes a stator core and a stator coil wound on the stator core.
The rotor shaft includes working medium pump rotor shaft 133, motor rotor shaft 131 and turbine rotor shaft 132 that link to each other in proper order from the front to the back, and the rear end of working medium pump rotor shaft 133 and motor rotor shaft 131 is located third installation space 103 and other mostly are located first installation space 101, and motor rotor shaft 131 is located first installation space 101, and the rear end of turbine rotor shaft 132 is located second installation space 102 and its and most are located first installation space 101, and wherein the embedded permanent magnet core 131a that is equipped with of motor rotor shaft 131, permanent magnet core 131a is just right with stator module 120.
As the rotor shaft rotates, the permanent magnet core 131a on the rotor shaft generates a rotating magnetic field, whereby the stator coils in the stator assembly 120 cut the magnetic field and induce current, thereby converting mechanical energy into electrical energy.
A front radial permanent magnet offset magnetic levitation bearing 141 is disposed on the motor housing 111 and is directly opposite to the working substance pump rotor shaft 133 to support the working substance pump rotor shaft 133 on the motor housing 111, and a rear radial permanent magnet offset magnetic levitation bearing 142 is disposed on the motor housing 111 and is directly opposite to the turbine rotor shaft 132 to support the turbine rotor shaft 132 on the motor housing 111. Thus, the front and rear radial permanent magnet biased magnetic bearings 141 and 142 support the front and rear ends of the rotor shaft on the housing, respectively.
It should be noted that, the fact that the front radial permanent magnet offset magnetic suspension bearing 141 is opposite to the working medium pump rotor shaft 133 means that the front radial permanent magnet offset magnetic suspension bearing 141 is sleeved on the working medium pump rotor shaft 133 and does not directly physically contact with the working medium pump rotor shaft 133, and the working medium pump rotor shaft 133 is suspended; the fact that the rear radial permanent magnet offset magnetic suspension bearing 142 is opposite to the turbine rotor shaft 132 means that the rear radial permanent magnet offset magnetic suspension bearing 142 is sleeved on the turbine rotor shaft 132 and does not make direct physical contact with the working medium pump rotor shaft 133, and the turbine rotor shaft 132 is suspended. The rotor shaft is suspended and does not physically contact with the bearing or other parts, so that the friction force of the rotor shaft during rotation is greatly reduced, the loss of mechanical energy caused by friction is reduced, and the energy conversion rate is higher.
An axial permanent magnet biased magnetic suspension bearing 150 is provided on the front end of the motor housing 111 to limit axial displacement of the rotor shaft, thereby preventing the rotor shaft from moving in the axial direction. Specifically, the axial permanent magnet bias magnetic suspension bearing 150 may be disposed on the motor casing 111, and the rotor shaft may be provided with a flange opposite to the axial permanent magnet bias magnetic suspension bearing 150, where the axial permanent magnet bias magnetic suspension bearing 150 does not directly and physically contact with the flange, so that friction force during rotation of the rotor shaft is greatly reduced, loss of mechanical energy due to friction is reduced, and energy conversion rate is higher.
The number of the axial permanent magnet bias magnetic suspension bearings 150 can be one or two, when the number of the axial permanent magnet bias magnetic suspension bearings 150 is two, the two axial permanent magnet bias magnetic suspension bearings 150 are respectively positioned at two sides of the rotor shaft and are opposite to each other, and then the two axial permanent magnet bias magnetic suspension bearings 150 can clamp the rotor shaft in the axial direction. The lead wire of the axial permanent magnet bias magnetic suspension bearing 150 can be led out from the lower outlet 105 of the motor casing 111.
The expansion turbine 160 is disposed at the rear end of the turbine rotor shaft 132 and is located in the second installation space 102, the second installation space 102 includes an intake passage 102a, a turbine working chamber 102b and an exhaust passage 102c, the turbine working chamber 102b communicates with the intake passage 102a and the exhaust passage 102c, respectively, the expansion turbine 160 is located in the turbine working chamber 102b, and a gaseous working medium enters the turbine working chamber 102b from the intake passage 102a and is discharged from the exhaust passage 102c after working work is performed on the expansion turbine 160.
The gaseous working medium entering the turbine working chamber 102b from the air inlet channel 102a is a heated gaseous working medium with higher temperature, so that the expansion turbine 160 can be pushed to rotate, the expansion turbine 160 rotates to drive the rotor shaft to rotate, and then the mechanical energy is converted into electric energy.
The centrifugal impeller 170 is disposed at the front end of the rotor shaft 133 of the working fluid pump and is located in the third installation space 103, and the centrifugal impeller 170 is adapted to boost the working fluid discharged from the exhaust channel 102c, wherein the third installation space 103 has a working fluid pump inlet and a working fluid pump outlet, the working fluid pump inlet is communicated with the exhaust channel 102c, and the working fluid pump outlet is communicated with the intake channel 102a.
That is, the working substance discharged from the exhaust passage 102c may enter the third installation space 103, the centrifugal impeller 170 in the third installation space 103 rotates to pressurize the working substance, and then the pressurized working substance may enter the intake passage 102a. Of course, it will be understood that other devices for treating the working fluid may be disposed between the exhaust passage 102c and the inlet of the working fluid pump, and other devices for treating the working fluid may be disposed between the outlet of the working fluid pump and the inlet passage 102a, as will be described in detail later.
The operation of the turbine 100 according to the embodiment of the present invention will be briefly described below.
Firstly, the waste heat is utilized to heat the working medium, so that the working medium is vaporized, the gaseous working medium enters the turbine working chamber 102b through the air inlet channel 102a, the expansion turbine 160 is driven to rotate, and the expansion turbine 160 drives the rotor shaft to rotate. A permanent magnet core is provided on the motor rotor shaft 131 on the rotor shaft to form a rotating magnetic field, and the stator coil cuts the magnetic field to generate electric power.
Meanwhile, since the rotor shaft further includes the working medium pump rotor shaft 133, the working medium pump rotor shaft 133 may drive the centrifugal impeller 170 to rotate. The gaseous working medium after working of the expansion turbine 160 is cooled and liquefied, and enters the third installation space 103, the centrifugal impeller 170 rotates to pressurize the liquid working medium, and the pressurized liquid working medium is vaporized by waste heat and enters the air inlet channel 102a, so that a complete cycle is formed.
That is, unlike conventional turbines, the present invention no longer uses an expansion turbine to drive a generator to generate electrical energy, and then drives a working medium pump to operate through the electrical energy; but causes the expansion turbine 160 to simultaneously drive the motor rotor shaft 131 and the working medium pump rotor shaft 133 to rotate, and the centrifugal impeller 170 to rotate to pressurize the working medium in a liquid state.
The expansion turbine 160 simultaneously drives the turbine rotor shaft 132, the motor rotor shaft 131 and the working medium pump rotor shaft 133 to rotate, so that the step of supplying electric quantity generated by the generator to the working medium pump motor again and driving the working medium pump to rotate by the motor is omitted, unnecessary loss in the energy conversion process from heat energy to electric energy and from electric energy to mechanical energy is avoided, and the thermoelectric efficiency of the turbine 100 is remarkably improved.
In addition, the turbine rotor shaft 132, the motor rotor shaft 131 and the working medium pump rotor shaft 133 are integrated together, so that a motor for driving the working medium pump to rotate is omitted, the material cost is greatly reduced, the system structure is simplified, the torque pulsation of the rotor shaft is reduced, and the device is simple, reliable and low in cost.
Meanwhile, the rotor shaft is supported by the magnetic suspension bearing, so that the friction force of the rotor shaft in the rotating process is greatly reduced, and the energy loss of the rotor shaft in the rotating process is reduced. In addition, the magnetic suspension bearing provided by the embodiment of the invention adopts the permanent magnet bias magnetic suspension bearing, and compared with the traditional common magnetic suspension bearing, the power loss is greatly reduced.
In some embodiments of the invention, motor housing 111, scroll 112, and working fluid pump housing 113 are all integrally formed. Thereby, the casing structure of the turbine 100 is simplified, the casing strength of the turbine 100 is strengthened, and the production efficiency of the casing of the turbine 100 is improved at least to some extent.
In some embodiments of the present invention, as shown in FIG. 1, a cooling channel 104 is provided on the motor housing 111, the cooling channel 104 being used to cool the stator assembly 120 and the motor controller on the motor housing 111. Therefore, a large amount of heat generated by the stator assembly 120 can be taken away, and the influence of the stator assembly 120 on the working stability due to overhigh temperature is avoided.
Further, the inlet of the cooling passage 104 is connected to the working fluid pump outlet, and the outlet of the cooling passage 104 is connected to the exhaust passage 102 c. That is, the working fluid pressurized by the centrifugal impeller 170 may enter the cooling passage 104, absorb heat from the stator assembly 120 and the motor casing 111, enter the exhaust passage 102c, and then return to the third installation space 103 where the centrifugal impeller 170 is located, thereby forming a cycle.
In some embodiments of the present invention, a condenser 181 is provided between the exhaust passage 102c and the working fluid pump inlet. That is, the gaseous working medium after working on the expansion turbine 160 may be cooled by the condenser 181, so that the gaseous working medium may be converted into a liquid working medium, which is convenient for the centrifugal impeller 170 to pressurize the working medium.
Further, an evaporator 182 is disposed between the outlet of the working medium pump and the air inlet channel 102a, the evaporator 182 can heat the liquid working medium, so that the liquid working medium is vaporized, the gaseous working medium can do work on the expansion turbine 160, and the heat of the evaporator 182 can come from a low-grade heat source.
Further, a gas-liquid separator 183 is further provided between the evaporator 182 and the intake passage 102a, the gas-liquid separator 183 having a gas inlet connected to the outlet of the evaporator 182, a gas outlet connected to the intake passage 102a, and a liquid outlet connected to the inlet of the evaporator 182. So that the working medium discharged from the outlet of the evaporator 182 can be subjected to gas-liquid separation in the gas-liquid separator 183, the gaseous working medium can directly enter the air inlet channel 102a from the air outlet, and the separated liquid working medium can return to the evaporator 182 from the liquid outlet for heating and vaporization.
In some embodiments of the present invention, a working fluid bypass adjustment mechanism 184 is also provided between the inlet of evaporator 182 and the outlet of condenser 181. That is, the liquid working medium discharged from the outlet of the condenser 181 may enter the evaporator 182 after entering the working medium pump housing 113, or may return to the outlet of the condenser 181 and be pressurized. The working fluid bypass adjustment mechanism 184 can adjust the flow of working fluid into the working fluid pump housing 113 and the evaporator 182.
It should be noted that, in the working fluid pump housing 113 according to the embodiment of the present invention, the third installation space 103 where the centrifugal impeller 170 is located is provided.
In some embodiments of the invention, the turbine 100 further comprises power supply means for powering the stator coils, the forward radial permanent magnet biased magnetic bearings 141, the aft radial permanent magnet biased magnetic bearings 142 and the axial permanent magnet biased magnetic bearings 150; the stator coils are selectively connected with the front radial permanent magnet bias magnetic suspension bearing 141, the rear radial permanent magnet bias magnetic suspension bearing 142 and the axial permanent magnet bias magnetic suspension bearing 150 to supply power to the front radial permanent magnet bias magnetic suspension bearing 141, the rear radial permanent magnet bias magnetic suspension bearing 142 and the axial permanent magnet bias magnetic suspension bearing 150 after the power supply device is powered off.
In some embodiments of the present invention, the turbine 100 further includes an emergency power supply device connected to the stator coil, the emergency power supply device generating power using the remaining kinetic energy of the turbine 100 when the power grid is suddenly disconnected, and supplying power to the front radial permanent magnet biased magnetic levitation bearing 141, the rear radial permanent magnet biased magnetic levitation bearing 142, and the axial permanent magnet biased magnetic levitation bearing 150.
Therefore, the phenomenon that the magnetic suspension bearing is unstable when the power is suddenly cut off is avoided, and the self-protection of the magnetic suspension bearing is effectively realized.
In some embodiments of the present invention, a first sealing structure 191 is disposed between the first mounting space 101 and the second mounting space 102, and a second sealing structure 192 is disposed between the first mounting space 101 and the second mounting space 102. The working medium in the scroll 112 can be effectively prevented from entering the motor casing 111 by the first sealing structure 191, the working medium in the working medium pump casing 113 can be effectively prevented from entering the motor casing 111 by the second sealing structure 192, the sealing performance in the motor casing 111 is ensured, and parts in the motor casing 111 can work stably and efficiently.
The operation of the turbine 100 according to an embodiment of the present invention is described in detail below with reference to fig. 4.
Firstly, the liquid working medium enters the gas-liquid separator 183 after being heated by the evaporator 182, the gas-liquid separator 183 guides the gaseous working medium into the air inlet channel 102a, and simultaneously guides the liquid working medium into the inlet of the evaporator 182 so as to be heated and vaporized; the gaseous working medium enters the turbine working chamber 102b from the air inlet passage 102a and performs work on the expansion turbine 160 to drive the expansion turbine 160 to rotate.
The expansion turbine 160 drives the rotor shaft to rotate, wherein a permanent magnet is arranged on the motor rotor shaft 131 on the rotor shaft, so that a rotating magnetic field is formed, a stator coil cuts a magnetic field line to generate current, mechanical energy can be converted into electric energy, and then the electric energy is collected; meanwhile, a centrifugal impeller 170 is arranged on the working medium pump rotor shaft 133 on the rotor shaft, and the centrifugal impeller 170 is driven by the expansion turbine 160 to rotate.
After working on the expansion turbine 160, the gaseous working medium enters the condenser 181 to be cooled, so that the conversion from the gaseous state to the liquid state is realized, then the liquid working medium enters the third installation space 103, is pressurized by the centrifugal impeller 170 in the third installation space 103, and then enters the evaporator 182, so that a complete cycle is formed.
A working medium bypass adjusting mechanism 184 is further arranged between the outlet of the condenser 181 and the inlet of the evaporator 182, and the working medium bypass adjusting mechanism 184 can adjust the flow of the working medium entering the working medium pump housing 113 and the evaporator 182.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. A turbine, comprising:
the motor comprises a motor shell, a volute and a working medium pump shell, wherein the motor shell defines a first installation space, the volute defines a second installation space, the working medium pump shell defines a third installation space, the first installation space is separated from the second installation space at intervals, and the first installation space is separated from the third installation space;
stator module, stator module sets up on the inner wall of motor casing just stator module includes: a stator core and a stator coil wound on the stator core;
a rotor shaft, the rotor shaft comprising: the working medium pump rotor shaft, the motor rotor shaft and the turbine rotor shaft are sequentially connected from front to back, the front end of the working medium pump rotor shaft is positioned in the third installation space, the motor rotor shaft is positioned in the first installation space, the rear end of the turbine rotor shaft is positioned in the second installation space, a permanent magnet iron core is embedded in the motor shaft, and the permanent magnet iron core is opposite to the stator assembly;
the front radial permanent magnet offset magnetic suspension bearing is arranged on the motor shell and is opposite to the working medium pump rotor shaft so as to support the working medium pump rotor shaft on the motor shell, and the rear radial permanent magnet offset magnetic suspension bearing is arranged on the motor shell and is opposite to the turbine rotor shaft so as to support the turbine rotor shaft on the motor shell;
the axial permanent magnet biased magnetic suspension bearing is arranged at the front end of the motor casing to limit the axial displacement of the rotor shaft;
an expansion turbine provided at a rear end of the turbine rotor shaft and located in the second installation space, the second installation space including: the expansion turbine is positioned in the turbine working chamber, and gaseous working medium enters the turbine working chamber from the air inlet channel and is discharged from the exhaust channel after acting on the expansion turbine;
the centrifugal impeller is arranged at the front end of the rotor shaft of the working medium pump and is positioned in the third installation space, the centrifugal impeller is suitable for pressurizing working medium discharged from the exhaust channel, the third installation space is provided with a working medium pump inlet and a working medium pump outlet, the working medium pump inlet is communicated with the exhaust channel, and the working medium pump outlet is communicated with the air inlet channel.
2. The turbine of claim 1 wherein said motor housing, said volute, and said working fluid pump housing are all integrally formed.
3. The turbine of claim 1 wherein the motor housing is provided with cooling channels for cooling the stator assembly and motor controller in an upper portion of the motor housing.
4. A turbine according to claim 3, wherein the inlet of the cooling channel is connected to the working fluid pump outlet and the outlet of the cooling channel is connected to the exhaust channel.
5. The turbine of claim 1, wherein a condenser is disposed between the exhaust passage and the working fluid pump inlet.
6. The turbine of claim 5, wherein an evaporator is disposed between the working fluid pump outlet and the intake passage.
7. The turbine of claim 6, wherein a gas-liquid separator is disposed between the evaporator and the intake passage, the gas-liquid separator having an air inlet connected to the outlet of the evaporator, an air outlet connected to the intake passage, and a liquid outlet connected to the inlet of the evaporator.
8. The turbine of claim 6, wherein a working fluid bypass adjustment mechanism is further disposed between the inlet of the evaporator and the outlet of the condenser.
9. The turbine of claim 1, further comprising: the emergency power supply device is connected with the stator coil, and when the power grid is suddenly powered off, residual kinetic energy of the turbine is utilized to generate power so as to supply power for the front radial permanent magnet bias magnetic suspension bearing, the rear radial permanent magnet bias magnetic suspension bearing and the axial permanent magnet bias magnetic suspension bearing.
10. The turbine of claim 1, wherein a first seal is disposed between the first and second mounting spaces and a second seal is disposed between the first and third mounting spaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710744246.3A CN107503806B (en) | 2017-08-25 | 2017-08-25 | Turbine engine |
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| CN110332018B (en) * | 2019-07-18 | 2022-07-12 | 北京动力机械研究所 | High-compactness closed circulation runoff turbine power generation system rotor |
| CN110966051B (en) * | 2019-11-22 | 2022-04-26 | 中国科学院理化技术研究所 | Turbine expansion machine |
| CN111262379B (en) * | 2020-04-30 | 2020-08-07 | 山东天瑞重工有限公司 | Magnetic suspension motor with axially movable rotor and refrigeration equipment |
| CN113790089A (en) * | 2021-08-24 | 2021-12-14 | 鑫磊压缩机股份有限公司 | Low-temperature waste heat power generation system |
| CN113606162A (en) * | 2021-09-06 | 2021-11-05 | 北京昆腾迈格技术有限公司 | Energy-saving hydrogen circulating pump |
| CN113594499A (en) * | 2021-09-06 | 2021-11-02 | 北京昆腾迈格技术有限公司 | Integrated hydrogen fuel cell reaction system |
| CN113864000B (en) * | 2021-09-22 | 2023-09-26 | 鑫磊压缩机股份有限公司 | Rankine cycle power generation system |
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