CN220748630U - Magnetic suspension air compressor - Google Patents

Abstract

The utility model relates to the field of air compression technology, and in particular to a magnetic levitation air compressor. In order to solve the problems of high power consumption and ambient temperature limitation of existing magnetic levitation air compressors, the utility model proposes a magnetic levitation air compressor, which includes a compression host and a pre-cooler, wherein the pre-air outlet of the pre-cooler is connected to the first-stage compression air inlet of the compression host through a pre-air inlet pipe, and the pre-air inlet of the pre-cooler is connected to the external air outlet of the compression host through a pre-air return pipe. The use of the magnetic levitation air compressor of the utility model to produce compressed air can not only reduce the power consumption of the whole machine, but also avoid affecting user production due to undervoltage at the user end.

Description

A magnetic levitation air compressor

Technical Field

The utility model relates to the technical field of air compression, in particular to a magnetic suspension air compressor.

Background technique

The magnetic levitation air compressor uses magnetic levitation technology to replace traditional mechanical bearings, allowing the rotor to move in a contactless and frictionless state, thereby eliminating the mechanical wear and lubricating oil pollution problems caused by the rotor in the traditional air compressor during movement. However, the common magnetic levitation air compressors on the market are usually equipped with a separate air cooler to cool the inside of the compression host, and use cooling water to cool the casing of the compression host, which increases the overall power consumption and failure rate of the magnetic levitation air compressor. In addition, the intake temperature of the existing magnetic levitation air compressor is limited by the ambient temperature. When the ambient temperature is high, the exhaust volume of the magnetic levitation air compressor is reduced, which leads to insufficient terminal pressure of the compressed air output, that is, underpressure at the user end, affecting user production.

Summary of the invention

In order to solve the problem that the existing magnetic levitation air compressor has high power consumption and is limited by the ambient temperature, the utility model proposes a magnetic levitation air compressor, which includes a compression mainframe and a precooler, wherein the pre-air outlet of the precooler is connected to the first-stage compression air inlet of the compression mainframe through the pre-air inlet pipe, and the pre-air inlet of the precooler is connected to the external air outlet of the compression mainframe through the pre-air return pipe. The magnetic levitation air compressor of the utility model uses the precooler to cool the compression mainframe, and reduces the temperature of the air entering the compression mainframe through the first-stage compression air inlet, which can avoid the need to configure a separate air cooler specifically for cooling the interior of the compression mainframe, reduce the power consumption of the magnetic levitation air compressor of the utility model, and ensure the gas production of the magnetic levitation air compressor of the utility model. In addition, the magnetic levitation air compressor of the utility model uses the precooler to cool the air entering the compression mainframe through the first-stage compression air inlet, so as to solve the problem that the existing magnetic levitation air compressor has a reduced exhaust volume and a user-side undervoltage due to the high suction temperature during operation. It can be seen that the use of the magnetic levitation air compressor of the utility model to produce compressed air can not only reduce the power consumption of the whole machine, but also avoid affecting the user's production due to undervoltage at the user end. Preferably, a pre-pressure sensor is provided on the pre-return air pipe, an air supply pipe is provided at the pre-air inlet, and an air supply valve is provided on the air supply pipe. In this way, during the operation of the magnetic levitation air compressor of the utility model, the pre-pressure sensor can be used to monitor the air pressure in the pre-return air pipe in real time, so as to adjust the opening of the air supply valve according to the air pressure change in the pre-return air pipe, and replenish air for the compression host in the magnetic levitation air compressor of the utility model in time to prevent the generation of negative pressure. Furthermore, an air filter is provided at the first-stage compression air inlet of the compression host, and a pre-steam-water separator is provided on the pre-air inlet pipe, and the pre-steam-water separator is located between the pre-cooler and the air filter. In this way, a pre-steam-water separator is arranged between the pre-cooler and the air filter located at the primary compression air inlet of the compression main unit, and the pre-steam-water separator can be used to perform steam-water separation on the air entering the compression main unit through the primary compression air inlet, and the air filter can be used to filter to remove moisture, dust and other impurities in the air, thereby improving the dryness of the compressed air produced by the utility model magnetic levitation air compressor, and preventing impurities from entering the compression main unit and causing damage to the compression main unit. Further preferably, a pressure transmitter and an intake air temperature sensor are arranged at the primary compression air inlet of the compression main unit, and the pressure transmitter and the intake air temperature sensor are located between the air filter and the compression main unit. In this way, during the operation of the utility model magnetic levitation air compressor, the pressure transmitter and the intake air temperature sensor can be used to monitor the pressure and temperature of the air entering the compression main unit through the primary compression air inlet in real time, which is convenient for control and adjustment.

Preferably, the primary compression exhaust port of the compressor main unit is connected to the intercooler air inlet of the intercooler through the primary air outlet pipe, and the secondary compression air inlet of the compressor main unit is connected to the intercooler air outlet of the intercooler through the primary air return pipe. In this way, an intercooler is arranged between the primary compression exhaust port and the secondary compression air inlet of the compressor main unit, and the intercooler can be used to cool the primary compressed air discharged from the compressor main unit through the primary compression exhaust port, thereby reducing the temperature of the compressed air entering the compressor main unit through the secondary compression air inlet, thereby improving the compression effect of the compressor main unit. Furthermore, an intercooler steam-water separator, a primary return air pressure sensor, and a primary return air temperature sensor are arranged on the primary return air pipe, the intercooler steam-water separator is close to the intercooler air outlet of the intercooler, and the primary return air pressure sensor and the primary return air temperature sensor are located between the intercooler steam-water separator and the compressor main unit; a primary outlet air pressure sensor and a primary outlet air temperature sensor are arranged on the primary outlet air pipe. In this way, an intercooler steam-water separator is arranged on the first-level return air pipe to perform steam-water separation on the compressed air cooled by the intercooler, remove moisture in the compressed air, and further improve the dryness of the compressed air produced by the magnetic levitation air compressor of the utility model; a first-level return air pressure sensor and a first-level return air temperature sensor are arranged on the first-level return air pipe to monitor the pressure and temperature of the compressed air in the first-level return air pipe in real time, and a first-level outlet air pressure sensor and a first-level outlet air temperature sensor are arranged on the first-level outlet pipe to monitor the pressure and temperature of the first-level compressed air in the first-level outlet pipe in real time, so as to timely adjust the flow rate and temperature of the coolant entering the intercooler to ensure the cooling effect of the intercooler.

Preferably, the secondary compression exhaust port of the compression main unit is connected to the rear air inlet of the aftercooler through the secondary air outlet pipe, and the rear air outlet of the aftercooler is connected to the air supply pipe, on which a check valve and a rear steam-water separator are arranged, and the rear steam-water separator is located between the check valve and the aftercooler. In this way, an aftercooler is arranged at the secondary compression exhaust port of the compression main unit to cool the secondary compressed air outputted from the compression main unit through the secondary compression exhaust port, thereby reducing the temperature of the compressed air outputted by the magnetic levitation air compressor of the utility model, and the aftercooler can also play a noise reduction role, thereby reducing the working noise of the magnetic levitation air compressor of the utility model; a rear steam-water separator and a check valve are arranged on the air supply pipe connected to the rear air outlet of the aftercooler, so as to use the steam-water separator to remove moisture from the compressed air discharged from the aftercooler, and use the check valve to prevent the compressed air discharged from the aftercooler from flowing back. Furthermore, a secondary outlet pressure sensor, a secondary outlet temperature sensor and a safety valve are provided on the secondary outlet pipe, and the secondary outlet pressure sensor and the secondary outlet temperature sensor are located between the safety valve and the compression main unit; a discharge branch pipe and a vent branch pipe are connected to the secondary outlet pipe, and the discharge branch pipe and the vent branch pipe are connected to the secondary outlet pipe between the aftercooler and the safety valve, and a discharge butterfly valve and a discharge muffler are provided on the discharge branch pipe, and a vent valve and a discharge discharge muffler are provided on the vent branch pipe. In this way, during the operation of the magnetic levitation air compressor of the present invention, the compressed gas in the secondary air outlet pipe is discharged by the discharge butterfly valve to adjust the air pressure of the compression main engine at the secondary compression exhaust port, so as to prevent the magnetic levitation air compressor of the present invention from surging due to the pressure build-up at the secondary compression exhaust port; when the magnetic levitation air compressor of the present invention is shut down, the compressed air inside the magnetic levitation air compressor of the present invention is discharged into the atmosphere in time by the discharge valve, so as to prevent the surging when the discharge butterfly valve is not fully opened; a discharge muffler is arranged on the discharge branch pipe, and a discharge discharge muffler is arranged on the discharge branch pipe, so that when the discharge butterfly valve or the discharge valve discharges the compressed air in the secondary air outlet pipe into the atmosphere, the discharge muffler or the discharge discharge muffler is used to silence the noise, thereby reducing the noise generated during the operation of the magnetic levitation air compressor of the present invention.

Preferably, a water cooler is provided in the magnetic levitation air compressor, the reflux outlet of the water cooler is connected to the cooling inlet of the compression main unit, the reflux inlet of the water cooler is connected to the cooling outlet of the compression main unit, the cooling inlet of the water cooler is connected to the water inlet of the pre-cooler, the mid-cooler and the after-cooler, and the cooling outlet of the water cooler is connected to the water outlet of the pre-cooler, the mid-cooler and the after-cooler. In this way, a closed internal cycle is formed between the water cooler and the compression main unit, so that the water cooler is used to cool the coolant entering the compression main unit, so that the coolant in the magnetic levitation air compressor of the utility model can be recycled and the consumption of coolant can be reduced; the cooling inlet of the water cooler is connected to the water inlet of the pre-cooler, the middle cooler and the after-cooler, and the cooling outlet of the water cooler is connected to the water outlet of the pre-cooler, the middle cooler and the after-cooler, so that the water cooler can share the water inlet and the drain with the pre-cooler, the middle cooler and the after-cooler, which can simplify the setting of the water inlet and the drain in the magnetic levitation air compressor of the utility model. Further, a liquid storage tank and a reflux pump are arranged between the water cooler and the compression main unit, the liquid storage inlet of the liquid storage tank is connected to the reflux outlet of the water cooler, the liquid storage outlet of the liquid storage tank is connected to the liquid inlet of the reflux pump, and the liquid storage pressure gauge and the liquid storage temperature sensor are arranged on the liquid storage tank. In this way, a liquid storage tank and a reflux pump are arranged between the water cooler and the compression main unit, so that the liquid storage tank is used to store the coolant for the internal circulation of the magnetic levitation air compressor of the utility model, which is convenient for the storage and replenishment of the coolant for the internal circulation of the magnetic levitation air compressor of the utility model; the reflux pump is used to extract the coolant from the liquid storage tank and transport it to the compression main unit to promote the circulation of the coolant in the magnetic levitation air compressor of the utility model; the liquid storage pressure gauge and the liquid storage temperature sensor are used to monitor the pressure and temperature of the coolant in the liquid storage tank in real time, so as to adjust the flow rate and temperature of the cooling water used to cool the coolant for the internal circulation in the water cooler to adjust the temperature of the cooled coolant, thereby meeting the cooling needs of the internal circulation of the magnetic levitation air compressor of the utility model.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a structural schematic diagram of a magnetically suspended air compressor of the present invention.

Detailed ways

The magnetic levitation air compressor of the present invention is described in detail below in conjunction with FIG. 1 .

As shown in FIG1 , the magnetic levitation air compressor of the utility model comprises a compression main unit 1 and a precooler 2, wherein the compression main unit 1 is a magnetic levitation centrifugal compression main unit; the pre-air outlet (not shown in the figure) of the precooler 2 is connected to the first-stage compression air inlet 11 of the compression main unit 1 through a pre-air inlet pipe (not shown in the figure), and the pre-air inlet 22 of the precooler 2 is connected to the external air outlet 12 of the compression main unit 1 through a pre-air return pipe (not shown in the figure). In this way, the magnetic levitation air compressor of the utility model uses the precooler 2 to cool the compression main unit 1, that is, to reduce the temperature of the air entering the compression main unit 1 through the first-stage compression air inlet 11, which can avoid the need to configure a separate air cooler for cooling the interior of the compression main unit 1, reduce the power consumption of the whole machine of the magnetic levitation air compressor of the utility model, and ensure the gas output of the magnetic levitation air compressor of the utility model. In addition, the magnetic levitation air compressor of the utility model uses the front cooler 2 to cool the air entering the compression main unit 1 through the first-stage compression air inlet 11, which can solve the problem of reduced exhaust volume and undervoltage at the user end due to the high suction temperature of the existing magnetic levitation air compressor during operation. It can be seen that the use of the magnetic levitation air compressor of the utility model to produce compressed air can not only reduce the power consumption of the whole machine, but also avoid affecting the user's production due to undervoltage at the user end. Preferably, a front pressure sensor 221 is provided on the front return air pipe, and an air supply pipe (not shown in the figure) is provided at the front air inlet 22, and an air supply valve 222 is provided on the air supply pipe. In this way, during the operation of the magnetic levitation air compressor of the utility model, the front pressure sensor 221 can be used to monitor the air pressure in the front return air pipe in real time, so as to adjust the opening of the air supply valve 222 according to the air pressure change in the front return air pipe, and timely replenish air for the compression main unit 1 in the magnetic levitation air compressor of the utility model to prevent the generation of negative pressure. Preferably, the air supply valve 222 can adopt a butterfly valve, which is convenient to select and simple to control. Preferably, the air inlet of the air supply pipe is arranged inside the chassis of the magnetic levitation air compressor of the utility model, so that air can be drawn from the inside of the chassis for air supply during air supply, thereby taking away the radiant heat on the surface of the components inside the chassis. Preferably, an air filter 111 is arranged at the first-stage compression air inlet 11 of the compression host 1, and a pre-steam separator 112 is arranged on the pre-intake pipe, and the pre-steam separator 112 is located between the pre-cooler 2 and the air filter 111. In this way, the pre-steam separator 112 is arranged between the pre-cooler 2 and the air filter 111 located at the first-stage compression air inlet 11 of the compression host 1, and the pre-steam separator 112 can be used to perform steam-water separation on the air entering the compression host 1 through the first-stage compression air inlet 11, and the air filter 111 is used to filter and remove impurities such as moisture and dust in the air, thereby improving the dryness of the compressed air produced by the magnetic levitation air compressor of the utility model, and preventing impurities in the air from entering the compression host and causing damage to the compression host 1. Preferably, a pressure transmitter 113 and an intake air temperature sensor 114 are provided at the primary compression air inlet 11 of the compression main unit 1, and the pressure transmitter 113 and the intake air temperature sensor 114 are located between the air filter 111 and the compression main unit 1. In this way, during the operation of the magnetic levitation air compressor of the utility model, the pressure transmitter 113 and the intake air temperature sensor 114 can be used to monitor the pressure and temperature of the air entering the compression main unit 1 through the primary compression air inlet 11 in real time, which is convenient for control and adjustment.

As shown in FIG1 , the utility model magnetic levitation air compressor is provided with an intercooler 3, the intercooler air inlet of the intercooler 3 is connected to the primary compression exhaust port 13 of the compression host 1 through the primary exhaust pipe (not shown in the figure), and the intercooler air outlet of the intercooler 3 (not shown in the figure) is connected to the secondary compression air inlet 14 of the compression host 1 through the primary return pipe (not shown in the figure). In this way, the intercooler 3 is arranged between the primary compression exhaust port 13 and the secondary compression air inlet 14 of the compression host 1, and the intercooler 3 can be used to cool the primary compressed air discharged from the compression host 1 through the primary compression exhaust port 13, reduce the temperature of the compressed air entering the compression host 1 through the secondary compression air inlet 14 for secondary compression, and thus improve the compression effect of the compression host 1. Preferably, an intercooler steam-water separator 141, a first-level return air pressure sensor 142 and a first-level return air temperature sensor 143 are provided on the first-level return air pipe, the intercooler steam-water separator 141 is close to the intercooler air outlet of the intercooler 3, and the first-level return air pressure sensor 142 and the first-level return air temperature sensor 143 are located between the intercooler steam-water separator 141 and the compression main unit 1; a first-level outlet air pressure sensor 131 and a first-level outlet air temperature sensor 132 are provided on the first-level outlet air pipe. In this way, an intercooler steam-water separator 141 is arranged on the first-level return air pipe to perform steam-water separation on the compressed air cooled by the intercooler 3, remove moisture in the compressed air, and further improve the dryness of the compressed air produced by the magnetic levitation air compressor of the present invention; a first-level return air pressure sensor 142 and a first-level return air temperature sensor 143 are arranged on the first-level return air pipe to monitor the pressure and temperature of the compressed air in the first-level return air pipe in real time, and a first-level outlet air pressure sensor 131 and a first-level outlet air temperature sensor 132 are arranged on the first-level outlet pipe to monitor the pressure and temperature of the first-level compressed air in the first-level outlet pipe in real time, so as to timely adjust the water inlet pressure and water inlet temperature of the cooling water entering the intercooler 3 to ensure the cooling effect of the intercooler 3.

As shown in Figure 1, the magnetic levitation air compressor of the utility model is provided with an aftercooler 4, and the rear air inlet of the aftercooler 4 is connected to the secondary compression exhaust port 15 of the compression host 1 through a secondary air outlet pipe (not shown in the figure), and the rear air outlet (not shown in the figure) of the aftercooler 4 is connected to an air supply pipe (not shown in the figure), and a check valve 41 and a rear steam-water separator 42 are provided on the air supply pipe, and the rear steam-water separator 42 is located between the check valve 41 and the aftercooler 4. In this way, an aftercooler 4 is arranged at the secondary compression exhaust port 15 of the compression main unit 1 to cool the secondary compressed air output by the compression main unit 1 through the secondary compression exhaust port 15, thereby reducing the temperature of the compressed air output by the magnetic levitation air compressor of the utility model, and the aftercooler 4 can also play a noise reduction role, thereby reducing the working noise of the magnetic levitation air compressor of the utility model; a aftercooler 42 and a check valve 41 are arranged on the air supply pipe connected to the rear air outlet of the aftercooler 4, so as to utilize the aftercooler 42 to remove moisture in the compressed air discharged by the aftercooler 4, and utilize the check valve 41 to prevent the compressed air discharged through the aftercooler 4 from flowing back. Preferably, a secondary outlet pipe is provided with a secondary outlet pressure sensor 151, a secondary outlet temperature sensor 152 and a safety valve 153, and the secondary outlet pressure sensor 151 and the secondary outlet temperature sensor 152 are located between the safety valve 153 and the compression main unit 1; a discharge branch pipe (not shown in the figure) and a vent branch pipe (not shown in the figure) are connected to the secondary outlet pipe, and the discharge branch pipe and the vent branch pipe are connected to the secondary outlet pipe between the aftercooler 4 and the safety valve 153, and a discharge butterfly valve 154 and a discharge muffler 155 are provided on the discharge branch pipe, and a vent valve 156 and a vent discharge muffler 157 are provided on the vent branch pipe. In this way, during the operation of the magnetic levitation air compressor of the present invention, the discharge butterfly valve 154 is used to discharge the compressed gas in the secondary air outlet pipe to adjust the air pressure of the compression host 1 at the secondary compression exhaust port 15, so as to prevent the magnetic levitation air compressor of the present invention from surging due to the pressure build-up at the secondary compression exhaust port 15; when the magnetic levitation air compressor of the present invention is stopped, the vent valve 156 is used to discharge the compressed air inside the magnetic levitation air compressor of the present invention into the atmosphere in time, so as to prevent the magnetic levitation air compressor of the present invention from surging due to the pressure build-up at the secondary compression exhaust port 15. The air compressor surges when the discharge butterfly valve 154 is not fully opened; a discharge silencer 155 connected to the discharge outlet of the discharge butterfly valve 154 is provided on the discharge branch pipe, and a vent discharge silencer 157 connected to the vent outlet of the vent valve 156 is provided on the vent branch pipe, so that when the discharge butterfly valve 154 or the vent valve 156 discharges compressed air into the atmosphere, the discharge silencer 155 or the vent discharge silencer 157 is used to silence the noise, thereby reducing the noise generated during the operation of the magnetic levitation air compressor of the utility model. Preferably, the vent valve 156 is connected to a vent solenoid valve 158. In this way, during the operation of the magnetic levitation air compressor of the utility model, the vent solenoid valve 158 can be powered on or off to control the vent valve 156 to close or open, thereby realizing automatic control of the vent valve 156, and the control is simple and convenient.

As shown in Figure 1, a water cooler 5 is provided in the magnetic levitation air compressor of the utility model, the reflux outlet 51 of the water cooler 5 is connected with the cooling inlet 17 of the compression main unit 1, the reflux inlet 52 of the water cooler 5 is connected with the cooling outlet 16 of the compression main unit 1, the cooling inlet 53 of the water cooler 5 is connected with the water inlet of the pre-cooler 2, the middle cooler 3 and the after-cooler 4, and the cooling outlet 54 of the water cooler 5 is connected with the water outlet of the pre-cooler 2, the middle cooler 3 and the after-cooler 4. In this way, a closed internal loop is formed between the water cooler 5 and the compression main unit 1, so that the water cooler 5 is used to cool the coolant entering the compression main unit 1, so that the coolant in the magnetic levitation air compressor of the utility model can be recycled and the consumption of the coolant is reduced; the cooling inlet 53 of the water cooler 5 is connected with the water inlets of the pre-cooler 2, the middle cooler 3 and the after-cooler 4, and the cooling outlet 54 of the water cooler 5 is connected with the water outlets of the pre-cooler 2, the middle cooler 3 and the after-cooler 4, so that the water cooler 5 can share the water inlet and the drain outlet with the pre-cooler 2, the middle cooler 3 and the after-cooler 4, which can simplify the setting of the water inlet and the drain outlet in the magnetic levitation air compressor of the utility model. Preferably, a liquid storage tank 6 and a reflux pump 7 are arranged between the water cooler 5 and the compression main unit 1, the liquid storage inlet 61 of the liquid storage tank 6 is connected to the reflux outlet 51 of the water cooler 5, the liquid storage outlet 62 of the liquid storage tank 6 is connected to the liquid inlet 71 of the reflux pump 7, the liquid outlet (not shown in the figure) of the reflux pump 7 is connected to the cooling inlet 17 of the compression main unit 1, and the liquid storage tank 6 is provided with a liquid storage pressure gauge 81 and a liquid storage temperature sensor 82. In this way, a liquid storage tank 6 and a reflux pump 7 are arranged between the water cooler 5 and the compression main unit 1, so that the liquid storage tank 6 can be used to store the coolant for the internal circulation of the magnetic levitation air compressor of the utility model, which is convenient for the storage and replenishment of the coolant for the internal circulation of the magnetic levitation air compressor of the utility model; the reflux pump 7 is used to extract the coolant from the liquid storage tank 6 and transport it to the compression main unit 1, so as to promote the circulation of the coolant in the magnetic levitation air compressor of the utility model and improve the cooling effect; the liquid storage pressure gauge 81 and the liquid storage temperature sensor 82 are used to monitor the pressure and temperature of the coolant in the liquid storage tank 6 in real time, so as to adjust the temperature of the cooled coolant by adjusting the water inlet pressure and water inlet temperature of the cooling water used to cool the internal circulation coolant in the water cooler 5, thereby meeting the cooling needs of the internal circulation of the magnetic levitation air compressor of the utility model. Preferably, the magnetic levitation air compressor of the present invention uses ethylene glycol antifreeze as the internal circulation medium, i.e., the coolant, which can not only reduce the scaling inside the magnetic levitation air compressor of the present invention, but also prevent the internal channel of the magnetic levitation air compressor of the present invention from freezing due to not being turned on in winter. Preferably, the cooling inlet 53 of the water cooler 5 and the water inlets of the pre-cooler 2, the inter-cooler 3 and the after-cooler 4 are all connected to a water inlet main pipe (not shown in the figure), and the water inlet main pipe is provided with an inlet pressure sensor 91 and an inlet temperature sensor 92 to monitor the inlet pressure and inlet temperature of the cooling water entering the water cooler 5, the pre-cooler 2, the inter-cooler 3 and the after-cooler 4 in real time to determine whether the magnetic levitation air compressor of the utility model reaches the start-up conditions; the cooling outlet 54 of the water cooler 5 and the water outlets of the pre-cooler 2, the inter-cooler 3 and the after-cooler 4 are all connected to a water outlet main pipe (not shown in the figure), and the water outlet main pipe is provided with an outlet water temperature sensor 93 to monitor the temperature of the cooling water discharged from the water cooler 5, the pre-cooler 2, the inter-cooler 3 and the after-cooler 4 in real time.

The utility model magnetic levitation air compressor drives the gas to rotate at high speed by the impeller, so that the gas generates centrifugal force. Due to the expansion flow of the gas in the diffuser, the flow velocity and pressure of the gas after passing through the impeller are increased, and compressed air is continuously produced.

Before powering on:

The inlet temperature sensor 92 and the inlet pressure sensor 91 on the water inlet main pipe detect whether the inlet temperature and the inlet pressure of the coolant entering the magnetic levitation air compressor of the utility model meet the startup conditions. For example, the startup requirements are that the inlet pressure is ≥1.5bar and the inlet temperature is ≤32°C. When any one of the inlet pressure and the inlet temperature does not meet the set requirements, the magnetic levitation air compressor of the utility model cannot be started. At the same time, the temperature condition is displayed on the control panel of the magnetic levitation air compressor of the utility model to facilitate adjustment and maintenance by operators and maintenance personnel.

When booting:

The reflux pump 7 works preferentially, conveying the ethylene glycol antifreeze in the liquid storage tank 6 to the motor housing of the compressor main unit 1 for circulation, taking away the heat inside the motor, and exchanging heat with the cooling water in the water cooler 5 to lower the temperature, and then returning to the liquid storage tank 6, thus repeating the cycle.

At the same time, the motor shaft in the compression host 1 will be in a suspended state as the magnetic suspension bearing is in a suspended state, the vent solenoid valve 158 is energized, the vent valve 156 is closed, and the discharge butterfly valve 154 is in a fully open state, and the compression host 1 in the magnetic suspension air compressor of the utility model starts to work.

During the operation of the magnetic levitation air compressor of the utility model, the gas operation process is as follows:

First, air in the atmosphere enters the motor casing of the compressor main unit 1 from an independent external air inlet (not shown in the figure) of the compressor main unit 1 to take away the heat inside the motor and enters the pre-cooler 2 through the pre-return air pipe for cooling to obtain low-temperature air. The low-temperature air passes through the pre-steam separator 112, the air filter 111 and the first-stage compression air inlet in turn and enters the first-stage compression chamber in the compressor main unit 1. The pre-steam separator 112 is used to remove moisture from the low-temperature air, and the air filter 111 is used to remove impurities in the low-temperature air, thereby improving the dryness and cleanliness of the low-temperature air entering the first-stage compression chamber in the compressor main unit 1. When the front pressure sensor 221 detects that the suction pressure P in the front return air pipe is lower than the set value, such as P<0.09Mpa, the air supply valve 222 is opened to supply air to the first-stage compression chamber of the compression host 1; when the suction pressure P is greater than the set value, such as P>0.1Mpa, the air supply valve 222 is closed. At this time, the low-temperature air entering the first-stage compression chamber in the compression host 1 is all obtained by cooling and filtering the air inside the motor in the compression host 1.

Next, in the compressor main unit 1, the low-temperature air in the primary compression chamber is compressed by the rotation of the primary impeller to obtain high-temperature and low-pressure primary compressed air, and the high-temperature and low-pressure primary compressed air is discharged through the primary compression exhaust port 13 on the compressor main unit 1, i.e., the primary volute, and transported to the intercooler 3 through the primary outlet pipe for cooling and cooling to obtain low-temperature and low-pressure primary compressed air. The low-temperature and low-pressure primary compressed air is dehydrated by the intercooler steam-water separator 141 and transported to the secondary compression chamber in the compressor main unit 1 through the primary return pipe connected to the secondary compression air inlet of the compressor main unit 1. The high-temperature and high-pressure secondary compressed air is compressed by the rotation of the secondary impeller to obtain high-temperature and high-pressure secondary compressed air, which is discharged through the secondary compression exhaust port 15 on the compressor main unit 1, i.e., the secondary volute. When the air temperature and air pressure at the secondary compression exhaust port 15, i.e., the secondary outlet pipe, are within the set range, the high-temperature and high-pressure secondary compressed air is transported to the post-cooler 4 through the secondary outlet pipe for cooling to form low-temperature and high-pressure compressed air, and the low-temperature and high-pressure compressed air is dehydrated by the post-steam separator 42 and supplied to the user end; when When the air temperature and air pressure at the secondary compression exhaust port 15, i.e., the secondary air outlet pipe, are too high, in order to prevent the magnetic levitation air compressor of the utility model from surging due to the pressure build-up at the secondary compression exhaust port 15 of the compression main unit 1, a part of the high-temperature and high-pressure secondary compressed air is discharged into the atmosphere through the discharge butterfly valve 154 when the air pressure and air temperature in the secondary air outlet pipe are too high, and in the process of increasing the frequency of the motor in the compression main unit 1, the discharge butterfly valve 154 will gradually close until the air temperature and air pressure at the secondary compression exhaust port 15 reach the set value, and the discharge butterfly valve 154 is completely closed, and the high-temperature and high-pressure secondary compressed air output by the compression main unit 1 all enters the after-cooler 4 for cooling and cooling, and then is supplied to the user end after the moisture is removed by the after-water vapor separator 42.

During the operation of the magnetic levitation air compressor of the utility model, the cooling water in the water inlet main pipe enters the water cooler 5, the precooler 2, the middle cooler 3 and the aftercooler 4 in four ways respectively, and the cooling water discharged from the water cooler 5, the precooler 2, the middle cooler 3 and the aftercooler 4 is collected in the water outlet main pipe and then discharged to the outside of the magnetic levitation air compressor of the utility model by the water outlet main pipe. Among them, the cooling water entering the water cooler 5 performs heat exchange with the internal circulation medium (ethylene glycol antifreeze) in the water cooler 5 to reduce the temperature of the internal circulation medium; the cooling water entering the precooler 2 performs heat exchange with the high-temperature air in the precooler 2; the cooling water entering the middle cooler 3 performs heat exchange with the first-stage compressed air of high temperature and low pressure in the middle cooler 3; the cooling water entering the aftercooler 4 performs heat exchange with the second-stage compressed air of high temperature and high pressure in the aftercooler 4.

When uninstalling:

The central control system in the magnetic levitation air compressor of the utility model controls the opening of the discharge butterfly valve 154 to a suitable size according to the system pressure, and discharges the excess compressed air in the system into the atmosphere through the discharge silencer 155.

During shutdown:

The reflux pump 7 stops working, the vent solenoid valve 158 is powered off, and the vent valve 156 is immediately opened to discharge the compressed air in the magnetic levitation air compressor of the utility model into the atmosphere in time to prevent the discharge butterfly valve 154 from sending surge phenomenon when it is not fully opened. The discharge butterfly valve 154 is gradually opened until the valve is fully opened; when the motor frequency in the compression host 1 is zero, the magnetic levitation air compressor of the utility model is not in a completely stopped state. Only when the magnetic levitation bearing of the motor in the compression host 1 falls completely, the magnetic levitation air compressor of the utility model is in a completely stopped state.

In addition, after the magnetic levitation air compressor of the utility model is started, the central processing unit can be used to adjust the speed of the motor in the compression host 1 through the frequency conversion of the frequency converter according to the user's operating conditions, so as to achieve energy saving; when the gas consumption at the user's end is relatively low, the central processing unit can be used to open the discharge butterfly valve 154 according to the performance curve of the compression host 1, and the excess gas can be discharged to prevent the compression host 1 from sending surge.

Claims (10)

1. A magnetic levitation air compressor, characterized in that the magnetic levitation air compressor comprises a compression main unit and a precooler, the pre-air outlet of the precooler is connected to the first-stage compression air inlet of the compression main unit through a pre-air inlet pipe, and the pre-air inlet of the precooler is connected to the external air outlet of the compression main unit through a pre-air return pipe. 2. The magnetic levitation air compressor according to claim 1 is characterized in that a front pressure sensor is provided on the front air return pipe, an air supply pipe is provided at the front air inlet, and an air supply valve is provided on the air supply pipe. 3. The magnetic levitation air compressor according to claim 2 is characterized in that an air filter is provided at the first-stage compression air inlet of the compression main unit, a pre-steam-water separator is provided on the pre-intake pipe, and the pre-steam-water separator is located between the pre-cooler and the air filter. 4. The magnetic levitation air compressor according to claim 3 is characterized in that a pressure transmitter and an intake air temperature sensor are provided at the first-stage compression air inlet of the compression main unit, and the pressure transmitter and the intake air temperature sensor are located between the air filter and the compression main unit. 5. The magnetic levitation air compressor according to any one of claims 1 to 4 is characterized in that the first-stage compression exhaust port of the compression main unit is connected to the intercooler air inlet of the intercooler through a first-stage air outlet pipe, and the second-stage compression air inlet of the compression main unit is connected to the intercooler air outlet of the intercooler through a first-stage air return pipe. 6. The magnetic levitation air compressor according to claim 5 is characterized in that an intercooler steam-water separator, a first-level return air pressure sensor and a first-level return air temperature sensor are provided on the first-level return air pipe, the intercooler steam-water separator is close to the intercooler air outlet of the intercooler, and the first-level return air pressure sensor and the first-level return air temperature sensor are located between the intercooler steam-water separator and the compression main unit; a first-level outlet air pressure sensor and a first-level outlet air temperature sensor are provided on the first-level outlet air pipe. 7. The magnetic levitation air compressor according to claim 5 is characterized in that the secondary compression exhaust port of the compression main unit is connected to the rear air inlet of the aftercooler through a secondary air outlet pipe, and the rear air outlet of the aftercooler is connected to an air supply pipe, which is provided with a check valve and a rear steam-water separator, and the rear steam-water separator is located between the check valve and the aftercooler. 8. The magnetic levitation air compressor according to claim 7 is characterized in that a secondary outlet pressure sensor, a secondary outlet temperature sensor and a safety valve are provided on the secondary outlet pipe, and the secondary outlet pressure sensor and the secondary outlet temperature sensor are located between the safety valve and the compression main unit; a discharge branch pipe and a vent branch pipe are connected to the secondary outlet pipe, the discharge branch pipe and the vent branch pipe are connected to the secondary outlet pipe between the aftercooler and the safety valve, and a discharge butterfly valve and a discharge muffler are provided on the discharge branch pipe, and a vent valve and a vent discharge muffler are provided on the vent branch pipe. 9. The magnetic levitation air compressor according to claim 7 is characterized in that a water cooler is provided in the magnetic levitation air compressor, the reflux outlet of the water cooler is communicated with the cooling inlet of the compression main unit, the reflux inlet of the water cooler is communicated with the cooling outlet of the compression main unit, the cooling inlet of the water cooler is communicated with the water inlet of the pre-cooler, the middle cooler and the after-cooler, and the cooling outlet of the water cooler is communicated with the water outlet of the pre-cooler, the middle cooler and the after-cooler. 10. The magnetic levitation air compressor according to claim 9 is characterized in that a liquid storage tank and a reflux pump are arranged between the water cooler and the compression main unit, the liquid storage inlet of the liquid storage tank is connected to the reflux outlet of the water cooler, the liquid storage outlet of the liquid storage tank is connected to the liquid inlet of the reflux pump, and a liquid storage pressure gauge and a liquid storage temperature sensor are arranged on the liquid storage tank.