CN111441960A - Magnetic suspension centrifugal air compressor two-stage compression system - Google Patents
Magnetic suspension centrifugal air compressor two-stage compression system Download PDFInfo
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- CN111441960A CN111441960A CN202010346478.5A CN202010346478A CN111441960A CN 111441960 A CN111441960 A CN 111441960A CN 202010346478 A CN202010346478 A CN 202010346478A CN 111441960 A CN111441960 A CN 111441960A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
- F04D17/12—Multi-stage pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/058—Bearings magnetic; electromagnetic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/5826—Cooling at least part of the working fluid in a heat exchanger
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Electromagnetism (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The application relates to a two-stage compression system of a magnetic suspension centrifugal air compressor, wherein the system comprises a first compression assembly, a motor, a magnetic suspension bearing assembly, a second compression assembly, a controller, a first cooling circulation subsystem and a second cooling circulation subsystem; the motor comprises a motor cooling mechanism, a motor spindle and a motor stator sleeved on the motor spindle; the magnetic suspension bearing assemblies are sleeved on two sides of the motor spindle; the second compression control port is mechanically connected with the second end of the motor spindle; the controller is electrically connected with the magnetic suspension bearing assembly; the first cooling circulation subsystem is in circulation through connection with the motor cooling mechanism; the second cooling circulation subsystem is connected between the first exhaust port and the second air inlet in a penetrating mode, and secondary compression of external input air is achieved. The oil-free compression process can be realized, pollution is avoided, noise is low, and compression efficiency is improved.
Description
Technical Field
The application relates to the technical field of compressors, in particular to a magnetic suspension centrifugal air compressor two-stage compression system.
Background
The air compressor is a basic product of industrial modernization, is used for providing air source power, is a main body in an electromechanical bleed air source device of a core device of a pneumatic system, is a device for converting mechanical energy of a prime mover (usually an electric motor) into gas pressure energy, and is an air pressure generating device for compressing air. The compression modes of the air compressor can comprise a first-stage compression mode and a second-stage compression mode, the air pressure generated by the second-stage compression mode is high, and the service life of the second-stage compression mode is long under the same pressure as that of the first-stage compression mode; the energy consumption of the secondary compression is high under the same pressure and the same gas production rate, but the abrasion is low. At present, a compressor adopting a two-stage compression mode is a double-screw two-stage compression air compressor system generally, but lubricating oil is needed in the compression process of the traditional double-screw two-stage compression air compressor system, pollution is easy to generate, noise is large, and compression efficiency is low.
In the implementation process, the inventor finds that at least the following problems exist in the conventional technology: lubricating oil is needed to be adopted in the compression process of the traditional double-screw two-stage compression air compressor system, pollution is easy to generate, noise is large, and compression efficiency is low.
Disclosure of Invention
On the basis, it is necessary to provide a magnetic suspension centrifugal air compressor two-stage compression system aiming at the problems that lubricating oil is needed in the compression process of the traditional double-screw two-stage compression air compressor system, pollution is easy to generate, noise is large, and compression energy efficiency is low.
In order to achieve the above object, an embodiment of the present invention provides a two-stage compression system of a magnetic suspension centrifugal air compressor, including:
a first compression assembly including a first air inlet, a first exhaust port, and a first compression control port; the first gas inlet is used for accessing external gas;
the motor comprises a motor cooling mechanism, a motor spindle and a motor stator sleeved on the motor spindle; the first end of the motor spindle is mechanically connected with the first compression control port;
the magnetic suspension bearing assembly is sleeved on two sides of the motor spindle;
a second compression assembly including a second air inlet, a second air outlet, and a second compression control port; the second compression control port is mechanically connected with the second end of the motor spindle; the second exhaust port is used for exhausting secondary compressed gas;
the controller is electrically connected with the magnetic suspension bearing assembly;
the first cooling circulation subsystem is in circulating through connection with the motor cooling mechanism;
the input end of the second cooling circulation subsystem is connected with the first exhaust port in a penetrating way; the output end of the second cooling circulation subsystem is connected with the second air inlet in a penetrating way.
In one embodiment, the gas filter is connected with the first gas inlet in a penetrating way.
In one embodiment, the first cooling cycle subsystem comprises a pump, a thermostatic valve and a heat exchanger;
the input end of the pump is communicated with the first end of the thermostatic valve, and the output end of the pump is communicated with the inlet of the motor cooling mechanism; the second end of the thermostatic valve is communicated with the output end of the heat exchanger; the outlet of the motor cooling mechanism is communicated with the input end of the heat exchanger; and the third end of the thermostatic valve is connected between the discharge port of the motor cooling mechanism and the input end of the heat exchanger in a penetrating manner.
In one embodiment, the motor further comprises an inverter electrically connected with the motor, and an inverter cooling mechanism for cooling the inverter;
the frequency converter cooling mechanism is connected between the outlet of the motor cooling mechanism and the input end of the heat exchanger in a penetrating way.
In one embodiment, the second cooling cycle subsystem includes a first cooler;
the input end of the first cooler is connected with the first exhaust port in a penetrating way, and the output end of the first cooler is connected with the second air inlet in a penetrating way.
In one embodiment, the system further comprises a third cooling circulation subsystem;
the input end of the third cooling circulation subsystem is communicated with the second exhaust port; and the output end of the third cooling circulation subsystem is used for discharging the cooled secondary compressed gas.
In one embodiment, the third cooling cycle subsystem includes a second chiller;
the input end of the second cooler is connected with the second exhaust port in a penetrating way, and the output end of the second cooler is used for exhausting the cooled second-stage compressed gas.
In one embodiment, the device further comprises a speed regulating valve;
the speed regulating valve is connected between the second exhaust port and the input end of the second cooler in a penetrating mode.
In one embodiment, the magnetic suspension bearing assembly comprises a first radial magnetic suspension bearing arranged at a first end of the motor spindle and a second radial magnetic suspension bearing arranged at a second end of the motor spindle;
the first radial magnetic suspension bearing is electrically connected with the controller; the second radial magnetic suspension bearing is electrically connected with the controller.
In one embodiment, the magnetic suspension bearing assembly further comprises an axial magnetic suspension bearing arranged on the motor spindle;
the axial magnetic suspension bearing is electrically connected with the controller.
One of the above technical solutions has the following advantages and beneficial effects:
in each embodiment of the above two-stage compression system of the magnetic suspension centrifugal air compressor, the first compression assembly comprises a first air inlet, a first air outlet and a first compression control port; the first gas inlet is used for accessing external gas; the motor comprises a motor cooling mechanism, a motor spindle and a motor stator sleeved on the motor spindle; the first end of the motor spindle is mechanically connected with the first compression control port; the magnetic suspension bearing assemblies are sleeved on two sides of the motor spindle; the second compression assembly comprises a second air inlet, a second air outlet and a second compression control port; the second compression control port is mechanically connected with the second end of the motor spindle; the second exhaust port is used for exhausting secondary compressed gas; the controller is electrically connected with the magnetic suspension bearing assembly; the first cooling circulation subsystem is in circulation through connection with the motor cooling mechanism; the input end of the second cooling circulation subsystem is connected with the first exhaust port in a penetrating way; and the output end of the second cooling circulation subsystem is in through connection with a second air inlet, so that secondary compression of external input air is realized. This application maintains motor spindle suspension through magnetic suspension bearing assembly, and then realizes motor spindle suspension and rotate, drives first compression subassembly and second compression subassembly work respectively, and the export after the one-level compression of first compression subassembly and second compression subassembly is compressed respectively to the outside gas, realizes not having oily compression process, avoids producing the pollution, and small in noise. Carry out cooling to the motor through first cooling cycle subsystem, cool off the gas after the one-level compression through second cooling cycle subsystem to the gas after will cooling returns the second compression subassembly and carries out the second grade compression, and then has improved the compression efficiency.
Drawings
FIG. 1 is a schematic diagram of a first configuration of a two-stage compression system of a magnetically levitated centrifugal air compressor in one embodiment;
FIG. 2 is a second schematic diagram of a two-stage compression system of a magnetically levitated centrifugal air compressor in one embodiment;
FIG. 3 is a first schematic diagram of a first cooling cycle sub-system in one embodiment;
FIG. 4 is a schematic diagram of a third configuration of a two-stage compression system of a magnetically levitated centrifugal air compressor in one embodiment;
FIG. 5 is a fourth schematic diagram of a two-stage compression system of a magnetically levitated centrifugal air compressor in one embodiment;
FIG. 6 is a schematic diagram of a magnetic bearing assembly in one embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The double-screw two-stage compression air compressor aims at solving the problems that lubricating oil is needed in the compression process of a traditional double-screw two-stage compression air compressor system, pollution is easy to generate, noise is large, and compression efficiency is low. In one embodiment, as shown in FIG. 1, there is provided a magnetic levitation centrifugal air compressor two-stage compression system, comprising:
a first compression assembly 110, the first compression assembly 110 including a first air inlet, a first exhaust port, and a first compression control port; the first gas inlet is used for accessing external gas;
the motor 120, the motor 120 includes a motor cooling mechanism 122, a motor spindle 124 and a motor stator 126 sleeved on the motor spindle 124; a first end of the motor spindle 124 is mechanically connected to the first compression control port;
the magnetic suspension bearing assembly 130 is sleeved on two sides of the motor spindle 124;
a second compression assembly 140, the second compression assembly 140 including a second inlet port, a second exhaust port, and a second compression control port; the second compression control port is mechanically connected to the second end of the motor spindle 124; the second exhaust port is used for exhausting secondary compressed gas;
the controller 150, the controller 150 is electrically connected with the magnetic suspension bearing assembly 130;
the first cooling circulation subsystem 160, the first cooling circulation subsystem 160 is connected with the motor cooling mechanism 122 in a circulation and through manner;
the input end of the second cooling circulation subsystem 170 is connected with the first exhaust port in a penetrating way; the output end of the second cooling circulation subsystem 170 is connected through the second air inlet.
Wherein the first compression assembly 110 may be used to compress an external input gas. First compression assembly 110 may include a first compression chamber having a first impeller disposed therein in mechanical communication with motor shaft 124. In one example, external air enters the first compression chamber through the first air inlet of the first compression assembly 110, and the motor spindle 124 rotates to drive the first impeller to rotate, so that the compressed air input into the first compression chamber is compressed, and the compressed air of one stage is output through the first air outlet. It should be noted that the motor spindle 124 may be mechanically connected to the first impeller through the first compression control port of the first compression assembly.
The motor 120 may be a permanent magnet synchronous motor. In one example, the motor 120 may be a permanent magnet direct drive high speed motor. The motor cooling mechanism 122 is used to cool the motor 120. In one example, the motor cooling mechanism 122 may include a flow channel for conveying a cooling fluid, and the cooling fluid is conveyed in the flow channel for cooling the motor to carry away heat of the motor, thereby cooling the motor 120. The motor spindle 124 refers to a rotating component in the motor. The motor stator 126 may be a stationary portion of the motor. The motor stator 126 may be comprised of three parts, a stator core, stator windings, and a housing. The primary function of the motor stator 126 is to generate a rotating magnetic field that causes the motor spindle to rotate.
The magnetic bearing assembly 130 refers to a bearing assembly capable of generating a magnetic force by the principle of electromagnetic induction. The magnetic bearing assembly 130 may be used to maintain the motor spindle 124 in suspension. When the magnetic bearing assembly 130 maintains the motor spindle 124 in suspension, the magnetic bearing assembly 130 is not in contact with the motor spindle 124 and no lubricant is added.
The second compression assembly 140 may be used to compress the first stage of compressed gas delivered by the first compression assembly 110. The second compression assembly 140 may include a second compression chamber having a second impeller disposed therein in mechanical communication with the motor shaft 124. In one example, the first-stage compressed gas enters the second compression chamber through the second gas inlet of the second compression assembly 140, and the motor spindle 124 rotates to drive the second impeller to rotate, so that the compressed gas input into the second compression chamber is compressed, and the second-stage compressed gas is output through the second gas outlet. It should be noted that the motor spindle 124 may be mechanically connected to the second turbine through a second compression control port of the second compression assembly.
The controller 150 may be used to control the magnetic bearing assembly 130 such that the magnetic bearing assembly 130 maintains the motor shaft 124 in levitation, hi one example, the controller 150 may be a P L C controller.
The first cooling cycle subsystem 160 may be used to cool the motor 120. The first cooling circulation sub-system 160 may be in circulation communication with the motor cooling mechanism 122 via a coolant transfer passage. The second cooling cycle subsystem 170 may be used to cool the first stage of compressed gas output by the first compression assembly 110. The second cooling circulation subsystem 170 may be in circulation communication with the first exhaust port of the first compression assembly 110 and the second intake port of the second compression assembly 110, respectively, via a coolant transfer passage.
Specifically, the system is powered on, the controller 150 controls the magnetic suspension bearing assembly 130 to operate, and the magnetic suspension bearing assembly 130 generates a magnetic force to maintain the motor spindle 124 in suspension. The motor spindle 124 rotates to drive the first compressing assembly 110 and the second compressing assembly 140 to work respectively. When the external air enters the first compression assembly 110, the first compression assembly 110 performs a first-stage compression on the external air and flows the compressed air into the second cooling cycle subsystem 170 through a pipe, and the second cooling cycle subsystem 170 cools the first-stage compressed air and transmits the cooled compressed air to the second compression assembly 170. The second compression assembly 170 performs secondary compression on the cooled compressed gas, and then outputs the gas after the secondary compression, thereby realizing efficient and energy-saving compressed gas.
Further, based on first cooling circulation subsystem 160 and motor cooling mechanism 122 circulation through connection, and then can pour into the coolant liquid into first cooling circulation subsystem 160, the heat that motor 120 produced is taken away through the circulation at motor cooling mechanism 122 to the coolant liquid, realizes the cooling to motor 120, prevents that the system during operation, motor temperature is too high and produces the trouble.
In the embodiment of the two-stage compression system of the magnetic suspension centrifugal air compressor, the first compression assembly comprises a first air inlet, a first air outlet and a first compression control port; the first gas inlet is used for accessing external gas; the motor comprises a motor cooling mechanism, a motor spindle and a motor stator sleeved on the motor spindle; the first end of the motor spindle is mechanically connected with the first compression control port; the magnetic suspension bearing assemblies are sleeved on two sides of the motor spindle; the second compression assembly comprises a second air inlet, a second air outlet and a second compression control port; the second compression control port is mechanically connected with the second end of the motor spindle; the second exhaust port is used for exhausting secondary compressed gas; the controller is electrically connected with the magnetic suspension bearing assembly; the first cooling circulation subsystem is in circulation through connection with the motor cooling mechanism; the input end of the second cooling circulation subsystem is connected with the first exhaust port in a penetrating way; and the output end of the second cooling circulation subsystem is in through connection with a second air inlet, so that secondary compression of external input air is realized. Maintain motor spindle suspension through magnetic suspension bearing assembly, and then realize motor spindle suspension and rotate, drive first compression subassembly and second compression subassembly work respectively, the export after the one-level compression of first compression subassembly and second compression subassembly is respectively passed through to the outside gas, realizes the oil-free compression process, avoids producing the pollution, and small in noise. Carry out cooling to the motor through first cooling cycle subsystem, cool off the gas after the one-level compression through second cooling cycle subsystem to the gas after will cooling returns the second compression subassembly and carries out the second grade compression, and then has improved the compression efficiency.
In one embodiment, as shown in FIG. 2, a magnetic levitation centrifugal air compressor two-stage compression system is provided, the system comprising a first compression assembly 210, a motor 220, a magnetic levitation bearing assembly 230, a second compression assembly 240, a controller 250, a first cooling cycle subsystem 260, and a second cooling cycle subsystem 270; wherein the first compressing assembly 210 includes a first air inlet, a first air outlet, and a first compression control port; the first gas inlet is used for accessing external gas; the motor 220 comprises a motor cooling mechanism 222, a motor spindle 224 and a motor stator 226 sleeved on the motor spindle 224; a first end of the motor spindle 224 is mechanically connected to the first compression control port; the magnetic suspension bearing assemblies 230 are sleeved on two sides of the motor spindle 224; the second compression assembly 240 includes a second intake port, a second exhaust port, and a second compression control port; the second compression control port is mechanically connected with the second end of the motor spindle 224; the second exhaust port is used for exhausting secondary compressed gas; the controller 250 is electrically connected with the magnetic suspension bearing assembly 230; the first cooling circulation subsystem 260 is in circulation through connection with the motor cooling mechanism 222; the input end of the second cooling circulation subsystem 270 is connected with the first exhaust port in a penetrating way; the output end of the second cooling circulation subsystem 270 is connected to the second air inlet. The system also includes a gas filter 280 connected through the first gas inlet.
The gas filter 280 may be used to filter impurities such as particles of the external gas input to the first compressing assembly 210. In one example, the gas filter 280 may be a sponge filter plate.
Specifically, after the system is powered on and started, the external air enters the first compression assembly 210 through the air filter 280, and the impurities such as dust particles in the external air are filtered out through the air filter 280, so that the impurities carried by the external air are prevented from damaging the internal mechanism of the system. The first compression assembly 210 performs a first-stage compression on the external gas and flows the compressed gas into the second cooling cycle subsystem 270 through a pipe, and the second cooling cycle subsystem 270 cools the first-stage compressed gas and transmits the cooled compressed gas to the second compression assembly 240. The second compression assembly 240 performs secondary compression on the cooled compressed gas, and then outputs the gas after the secondary compression, thereby realizing efficient and energy-saving compressed gas.
In one embodiment, as shown in FIG. 3, the first cooling cycle subsystem includes a pump 362, a thermostatic valve 364 and a heat exchanger 366.
The input end of the pump 362 is connected with the first end of the thermostatic valve 364 in a penetrating way, and the output end of the pump is connected with the inlet of the motor cooling mechanism 322 in a penetrating way; a second end of the thermostatic valve 364 is connected through the output of the heat exchanger 366; the outlet of the motor cooling mechanism 322 is connected with the input end of the heat exchanger 366; a third end of the thermostat 364 is connected through between the discharge port of the motor cooling mechanism 322 and the input of the heat exchanger 366.
Wherein the pump 362 may be a water pump. A pump 362 may be used to power the circulating flow of the cooling fluid. A thermostatic valve 364 may be used to control the constant temperature outflow of the coolant. The heat exchanger 366 is intended to transfer heat from a hot fluid to a cold fluid. The heat exchanger 366 may be, but is not limited to, a dividing wall heat exchanger, a hybrid heat exchanger, a regenerative heat exchanger, a double pipe heat exchanger.
Specifically, the input end of the pump 362 is connected through a first end of the thermostatic valve 364, and the output end is connected through an inlet port of the motor cooling mechanism 322; a second end of the thermostatic valve 364 is connected through the output of the heat exchanger 366; the outlet of the motor cooling mechanism 322 is connected with the input end of the heat exchanger 366; a third end of the thermostat 364 is connected through between the discharge port of the motor cooling mechanism 322 and the input of the heat exchanger 366. The cooling liquid flows into the heat exchanger 366, and under the action force provided by the pump 362, the cooling liquid flows into the inlet of the motor cooling mechanism 322 through the thermostatic valve 364 and flows back to the heat exchanger 366 from the outlet of the motor cooling mechanism 322, so that the cooling liquid is discharged through the heat exchanger 366, the cooling of the motor is realized, and the damage to the internal mechanism of the system due to the overhigh temperature of the motor in the gas compression process is prevented.
In one embodiment, as shown in fig. 3, the two-stage compression system of the magnetic levitation centrifugal air compressor further comprises a frequency converter 372 electrically connected to the motor 320, and a frequency converter cooling mechanism 374 for cooling the frequency converter; the inverter cooling mechanism 374 is connected through between the discharge port of the motor cooling mechanism 322 and the input end of the heat exchanger 366.
The frequency converter 372 can control the motor 320 by changing the frequency of the working power supply of the motor. The frequency converter cooling mechanism 374 can comprise a flow channel for transmitting cooling liquid, and the cooling liquid is transmitted in the flow channel of the frequency converter cooling mechanism 374 to carry away heat of the frequency converter 372, so that cooling of the frequency converter 372 is realized.
Specifically, the frequency converter 372 is electrically connected to the motor 320, and the frequency converter 372 can control the operation of the motor 320 by changing the frequency of the operating power supply of the motor. The frequency converter cooling mechanism 374 is connected between the outlet of the motor cooling mechanism 322 and the input end of the heat exchanger 366 in a penetrating way, then the cooling liquid flows into the heat exchanger 366, under the action force provided by the pump 362, the cooling liquid flows into the inlet of the motor cooling mechanism 322 through the thermostatic valve 364, is discharged from the outlet of the motor cooling mechanism 322, flows back to the heat exchanger 366 after passing through the frequency converter cooling mechanism 374, and is discharged through the heat exchanger 366, so that the cooling of the motor 320 and the frequency converter 372 is realized, and the damage to the internal mechanism of the system caused by overhigh temperature of the motor or the frequency converter in the gas compression process is prevented.
In one embodiment, as shown in FIG. 4, a magnetic levitation centrifugal air compressor two-stage compression system is provided that includes a first compression assembly 410, a motor 420, a magnetic levitation bearing assembly 430, a second compression assembly 440, a controller 450, a first cooling cycle subsystem 460, and a second cooling cycle subsystem 470. The second cooling cycle subsystem 470 includes a first chiller 472. The input end of the first cooler 472 is connected to the first exhaust port, and the output end is connected to the second air inlet.
First cooler 472 refers to a heat exchange device, and is configured to cool the gas compressed in the first stage of first compression assembly 410. The first cooler 472 may be, but is not limited to, a tube cooler, a plate cooler, and an air-cooled cooler.
Specifically, the input end of the first cooler 472 is connected through to the first exhaust port, and the output end is connected through to the second intake port. When the external gas enters the first compression assembly 410, the first compression assembly 410 performs one-stage compression on the external gas and flows the compressed gas into the first cooler 472 through the pipe, and the first cooler 472 cools the one-stage compressed gas and transmits the cooled compressed gas to the second compression assembly 440. The second compression assembly 440 performs secondary compression on the cooled compressed gas, and then outputs the gas after the secondary compression, thereby realizing efficient and energy-saving compressed gas.
In one particular embodiment, as shown in FIG. 4, the magnetic levitation centrifugal air compressor two-stage compression system further includes a third cooling cycle subsystem 480. The input end of the third cooling circulation subsystem 480 is connected with the second exhaust port in a penetrating way; the output of the third cooling cycle sub-system 480 is used to discharge the cooled secondary compressed gas.
The third cooling circulation subsystem 480 may be configured to cool the second-stage compressed gas output from the second compression assembly 440. The third cooling circulation sub-system 480 may be connected to the second discharge port of the second compression assembly through a cooling fluid transfer passage,
specifically, when the external air enters the first compression assembly 410, the first compression assembly 410 performs a first-stage compression on the external air and flows the compressed air into the second cooling cycle subsystem 470 through a pipe, and the second cooling cycle subsystem 470 cools the first-stage compressed air and transmits the cooled compressed air to the second compression assembly 440. The second compression assembly 440 performs secondary compression on the cooled compressed gas, transmits the gas subjected to secondary compression to the third cooling circulation subsystem 480, and outputs the gas after being cooled by the third cooling circulation subsystem 480, so that the compressed gas is further efficient and energy-saving.
In a particular embodiment, as shown in fig. 4, the third cooling cycle subsystem 480 includes a second cooler 482. The input end of the second cooler 482 is connected to the second exhaust port, and the output end is used for discharging the cooled second-stage compressed gas.
The second cooler 482 is a heat exchange device for cooling the gas compressed in the second compression assembly. The second cooler 482 may be, but is not limited to, a tube cooler, a plate cooler, and an air-cooled cooler.
Specifically, a second exhaust port of the second compression assembly 440 is connected through an input end of the second cooler 482. When the external gas enters the first compression assembly 410, the first compression assembly 410 performs one-stage compression on the external gas and flows the compressed gas into the first cooler 472 through the pipe, and the first cooler 472 cools the one-stage compressed gas and transmits the cooled compressed gas to the second compression assembly 440. The second compression assembly 440 performs secondary compression on the cooled compressed gas, and the gas after the secondary compression is cooled and cooled by the second cooler 482 and then is output, so that the high-efficiency and energy-saving compressed gas is realized.
In one embodiment, as shown in FIG. 5, a magnetic levitation centrifugal air compressor two-stage compression system is provided, the system comprising a first compression assembly 510, a motor 520, a magnetic levitation bearing assembly 530, a second compression assembly 540, a controller 550, a first cooling cycle subsystem 560, and a second cooling cycle subsystem 570; wherein second cooling circulation subsystem 570 includes first cooler 572. An input end of the first cooler 572 is connected through a first exhaust port of the first compression module 510, and an output end is connected through a second intake port of the second compression module 540; third cooling cycle subsystem 580 includes a second chiller 582; the input end of the second cooler 582 is connected to the second exhaust port, and the output end is used for discharging the cooled second-stage compressed gas. The system also includes a speed valve 590; a speed valve 590 is connected through between the second discharge port of the second compression assembly 540 and the input of the second cooler 582.
The speed regulating valve 590 is a combination valve formed by connecting a constant-pressure-difference pressure reducing valve and a throttle valve in series.
Based on speed regulating valve 590 through connection between the second gas vent and the input of second cooler 582, and then after second compression subassembly 540 exported the gas of second grade compression, the output speed of accessible speed regulating valve 590 control second grade compressed gas realizes that the gas output speed after the second grade compression is adjustable.
In one embodiment, as shown in FIG. 6, the magnetic levitation bearing assembly 630 includes a first radial magnetic levitation bearing 632 disposed at a first end of the motor shaft 624 and a second radial magnetic levitation bearing 634 disposed at a second end of the motor shaft 624.
The first radial magnetic suspension bearing 632 is electrically connected to the controller 650; the second radial magnetic bearing 634 is electrically connected to the controller 650.
Wherein, the first radial magnetic suspension bearing 632 is an annular magnetic suspension bearing; the first radial magnetic bearing 632 refers to a magnetic bearing capable of generating a radial magnetic force. The second radial magnetic suspension bearing 634 is an annular magnetic suspension bearing; the second radial magnetic bearing 634 refers to a magnetic bearing capable of generating a radial magnetic force. The first radial magnetic suspension bearing 632 and the second radial magnetic suspension bearing 634 are respectively sleeved on the motor spindle 624.
Specifically, the controller 650 may control the first radial magnetic suspension bearing 632 and the second radial magnetic suspension bearing 634 to operate, respectively, so that the first radial magnetic suspension bearing 632 and the second radial magnetic suspension bearing 634 generate radial magnetic force, thereby maintaining the motor spindle 624 in suspension.
In a particular embodiment, the magnetic bearing assembly 630 further includes an axial magnetic bearing 636 disposed on the motor shaft 624; the axial magnetic bearing 636 is electrically connected with the controller 650.
The axial magnetic bearing 636 is a magnetic bearing capable of generating an axial magnetic force.
Specifically, the axial magnetic suspension bearing 636 is arranged on the motor spindle 624, and the controller 650 controls the axial magnetic suspension bearing 636 to work, so that the axial magnetic suspension bearing 636 generates an axial magnetic force, thereby maintaining the motor spindle 624 to be axially fixed.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A magnetic levitation centrifugal air compressor two-stage compression system, comprising:
a first compression assembly including a first air inlet port, a first exhaust port, and a first compression control port; the first gas inlet is used for accessing external gas;
the motor comprises a motor cooling mechanism, a motor spindle and a motor stator sleeved on the motor spindle; the first end of the motor spindle is mechanically connected with the first compression control port;
the magnetic suspension bearing assemblies are sleeved on two sides of the motor spindle;
a second compression assembly including a second air inlet, a second air outlet, and a second compression control port; the second compression control port is mechanically connected with the second end of the motor spindle; the second exhaust port is used for exhausting secondary compressed gas;
the controller is electrically connected with the magnetic suspension bearing assembly;
the first cooling circulation subsystem is in circulation through connection with the motor cooling mechanism;
the input end of the second cooling circulation subsystem is connected with the first exhaust port in a penetrating way; and the output end of the second cooling circulation subsystem is in through connection with the second air inlet.
2. The magnetic levitation centrifugal air compressor secondary compression system of claim 1, further comprising a gas filter in communication with the first gas inlet.
3. The magnetic levitation centrifugal air compressor two-stage compression system of claim 1, wherein the first cooling cycle subsystem comprises a pump, a thermostatic valve, and a heat exchanger;
the input end of the pump is in through connection with the first end of the thermostatic valve, and the output end of the pump is in through connection with the inlet of the motor cooling mechanism; the second end of the thermostatic valve is in through connection with the output end of the heat exchanger; the outlet of the motor cooling mechanism is communicated with the input end of the heat exchanger; and the third end of the thermostatic valve is connected between the discharge port of the motor cooling mechanism and the input end of the heat exchanger in a penetrating manner.
4. The magnetic levitation centrifugal air compressor secondary compression system as claimed in claim 3, further comprising a frequency converter electrically connected to the motor, and a frequency converter cooling mechanism for cooling the frequency converter;
and the frequency converter cooling mechanism is connected between the discharge port of the motor cooling mechanism and the input end of the heat exchanger in a penetrating manner.
5. The magnetic levitation centrifugal air compressor two-stage compression system of claim 1, wherein the second cooling cycle subsystem comprises a first cooler;
the input end through connection of first cooler first exhaust port, output through connection the second air inlet.
6. The magnetic levitation centrifugal air compressor two-stage compression system of claim 1, further comprising a third cooling cycle subsystem;
the input end of the third cooling circulation subsystem is communicated with the second exhaust port; and the output end of the third cooling circulation subsystem is used for discharging the cooled secondary compressed gas.
7. The magnetic levitation centrifugal air compressor two-stage compression system of claim 6, wherein the third cooling cycle subsystem comprises a second cooler;
and the input end of the second cooler is in through connection with the second exhaust port, and the output end of the second cooler is used for exhausting the cooled secondary compressed gas.
8. The magnetic levitation centrifugal air compressor secondary compression system of claim 7, further comprising a speed valve;
the speed regulating valve is connected between the second exhaust port and the input end of the second cooler in a penetrating mode.
9. The magnetically levitated centrifugal air compressor secondary compression system of claim 1, wherein the magnetically levitated bearing assembly includes the first radial magnetic bearing disposed at a first end of the motor spindle and a second radial magnetic bearing disposed at a second end of the motor spindle;
the first radial magnetic suspension bearing is electrically connected with the controller; the second radial magnetic suspension bearing is electrically connected with the controller.
10. The magnetic levitation centrifugal air compressor secondary compression system as recited in claim 9, wherein the magnetic levitation bearing assembly further comprises an axial magnetic levitation bearing disposed on the motor spindle;
the axial magnetic suspension bearing is electrically connected with the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010346478.5A CN111441960A (en) | 2020-04-29 | 2020-04-29 | Magnetic suspension centrifugal air compressor two-stage compression system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010346478.5A CN111441960A (en) | 2020-04-29 | 2020-04-29 | Magnetic suspension centrifugal air compressor two-stage compression system |
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| CN111441960A true CN111441960A (en) | 2020-07-24 |
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| CN202010346478.5A Pending CN111441960A (en) | 2020-04-29 | 2020-04-29 | Magnetic suspension centrifugal air compressor two-stage compression system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111794991A (en) * | 2020-09-08 | 2020-10-20 | 山东天瑞重工有限公司 | Magnetic suspension double round air-blower |
| CN116357592A (en) * | 2023-04-07 | 2023-06-30 | 山东华东风机有限公司 | Magnetic suspension air compression system and working method |
| CN116378977A (en) * | 2023-04-06 | 2023-07-04 | 山东众海机械有限公司 | Magnetic suspension centrifugal air compressor secondary compression system |
| CN116538110A (en) * | 2023-06-20 | 2023-08-04 | 山东华东风机有限公司 | Magnetic suspension air compressor |
| WO2024104238A1 (en) * | 2022-11-15 | 2024-05-23 | 中国船舶集团有限公司第七一一研究所 | Magnetic levitation electric motor sealing-cooling device and method for refrigeration system |
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2020
- 2020-04-29 CN CN202010346478.5A patent/CN111441960A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111794991A (en) * | 2020-09-08 | 2020-10-20 | 山东天瑞重工有限公司 | Magnetic suspension double round air-blower |
| WO2024104238A1 (en) * | 2022-11-15 | 2024-05-23 | 中国船舶集团有限公司第七一一研究所 | Magnetic levitation electric motor sealing-cooling device and method for refrigeration system |
| CN116378977A (en) * | 2023-04-06 | 2023-07-04 | 山东众海机械有限公司 | Magnetic suspension centrifugal air compressor secondary compression system |
| CN116357592A (en) * | 2023-04-07 | 2023-06-30 | 山东华东风机有限公司 | Magnetic suspension air compression system and working method |
| CN116357592B (en) * | 2023-04-07 | 2024-01-05 | 山东华东风机有限公司 | Magnetic suspension air compression system and working method |
| CN116538110A (en) * | 2023-06-20 | 2023-08-04 | 山东华东风机有限公司 | Magnetic suspension air compressor |
| CN116538110B (en) * | 2023-06-20 | 2024-02-13 | 山东华东风机有限公司 | Magnetic suspension air compressor |
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