Magnetic suspension centrifugal air compressor

Abstract

The utility model relates to the technical field of air compression, in particular to a magnetic suspension centrifugal air compressor. In order to solve the problem that energy consumption and use cost are increased due to the fact that a heater is additionally arranged on an existing air compressor, the utility model provides a magnetic suspension centrifugal air compressor which comprises a compression main machine and an intercooler. A first-stage air outlet of the compression main machine is communicated with an intercooling air inlet of the intercooler through a first-stage exhaust main pipe, and an intercooling air outlet of the intercooler is communicated with a second-stage air inlet of the compression main machine through a second-stage air inlet pipe; a first-stage exhaust branch pipe connected with the intercooler in parallel is connected between the first-stage air outlet of the compression main machine and the second-stage air inlet of the compression main machine, and a temperature adjusting valve is arranged on the first-stage exhaust branch pipe. When the magnetic suspension centrifugal air compressor is used for producing compressed air, a heater does not need to be additionally arranged, the requirement of a user for the temperature of the compressed air can be met, energy consumption can be saved, and use cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air compression, in particular to a magnetic suspension centrifugal air compressor. Background Art

[0002] Currently, some industries in the market have high requirements for the temperature of the compressed air they use. To meet these requirements, a heater is usually installed at the exhaust port of the air compressor to increase the temperature of the compressed air. Although this heater can meet the user's air demand, it also leads to increased energy consumption and operating costs. Utility Model Content

[0003] In order to solve the problem of increased energy consumption and usage costs caused by the installation of heaters in existing air compressors, the present invention proposes a magnetic levitation centrifugal air compressor, which includes a compression main unit and an intercooler. The first-level air outlet of the compression main unit is connected to the intercooler air inlet of the intercooler through a first-level exhaust main pipe, and the intercooler air outlet of the intercooler is connected to the secondary air inlet of the compression main unit through a secondary air inlet pipe; a first-level exhaust branch pipe connected in parallel with the intercooler is connected between the first-level air outlet of the compression main unit and the secondary air inlet of the compression main unit, and a temperature regulating valve is provided on the first-level exhaust branch pipe. In the magnetic levitation centrifugal air compressor of the present invention, the first-level air outlet and the secondary air inlet of the compression main unit are connected through a first-level exhaust branch pipe, and a temperature regulating valve for controlling on and off is provided on the first-level exhaust branch pipe. In this way, when the compressed air output by the magnetic levitation centrifugal air compressor of the present invention in a normal working state cannot meet the user's usage requirements due to low temperature, the temperature regulating valve can be opened and the opening of the temperature regulating valve can be adjusted as needed, so that the high-temperature compressed air discharged from the first-stage air outlet of the compression main unit is directly transported to the compression main unit through the first-stage exhaust branch pipe for secondary compression, that is, the temperature of the compressed air output by the compression main unit is increased by using the temperature of the high-temperature compressed air to meet the user's usage requirements. It can be seen from this that when using the magnetic levitation centrifugal air compressor of the present invention to produce compressed air, the user's temperature requirements for compressed air can be met without the need to install a heater, which can save energy consumption and reduce usage costs.

[0004] Preferably, a first temperature sensor is provided on the secondary air inlet of the compressor main unit; a second temperature sensor is provided on the secondary air outlet of the compressor main unit; a third temperature sensor is provided on the primary air outlet branch pipe, and the third temperature sensor is located at the inlet of the temperature regulating valve; a fourth temperature sensor is provided on the secondary air inlet pipe, and the fourth temperature sensor is close to the intercooler outlet. In this way, during the operation of the magnetic levitation centrifugal air compressor of the present invention, the temperature of the compressed air entering the compressor main unit from the secondary air inlet for secondary compression can be monitored in real time by the first temperature sensor, the temperature of the high-temperature compressed air discharged from the secondary air outlet of the compressor main unit and supplied to the user end can be monitored in real time by the second temperature sensor, the temperature of the compressed air output from the compressor main unit and supplied to the user end can be monitored in real time by the third temperature sensor, and the temperature of the compressed air cooled by the intercooler can be monitored in real time by the fourth temperature sensor, so that the user can adjust the opening of the temperature regulating valve in real time as needed, thereby meeting the temperature requirements of the compressed air produced by the magnetic levitation centrifugal air compressor of the present invention.

[0005] Furthermore, the first temperature sensor, the second temperature sensor, the third temperature sensor, and the fourth temperature sensor are electrically connected to a central control system, and the central control system adjusts the opening of the temperature control valve based on the temperatures detected by the first temperature sensor, the second temperature sensor, the third temperature sensor, and the fourth temperature sensor. Thus, during operation of the magnetic levitation centrifugal air compressor of the present invention, the central control system can automatically adjust the opening of the temperature control valve based on temperature data monitored in real time by the first temperature sensor, the second temperature sensor, the third temperature sensor, and the fourth temperature sensor, thereby providing ease of use and high control accuracy.

[0006] Preferably, the magnetic levitation centrifugal air compressor is provided with a water cooler, a liquid storage tank and a reflux pump, the return water inlet of the water cooler is connected to the drain outlet of the compression main unit, the return water outlet of the water cooler is connected through the liquid storage inlet of the liquid storage tank, the liquid storage outlet of the liquid storage tank is connected to the inlet of the reflux pump, and the outlet of the reflux pump is connected to the return water inlet of the compression main unit. In this way, during the operation of the magnetic levitation centrifugal air compressor of the present invention, the water cooler, the liquid storage tank and the reflux pump can be used to form a water cooling system of the compression main unit, which cooperates with the compression main unit to form a closed internal loop, so that the water cooler can be used to cool the coolant entering the compression main unit, so that the coolant in the magnetic levitation centrifugal air compressor of the present invention can be recycled, reducing the consumption of coolant.

[0007] Furthermore, the water cooling outlet of the water cooler is connected to the intercooler outlet of the intercooler, and the water cooling inlet of the water cooler is connected to the intercooler inlet of the intercooler. In this way, the water cooler and the intercooler can share a water inlet and a drain, which can simplify the arrangement of the water inlet and drain in the magnetic levitation air compressor of the utility model.

[0008] Further preferably, the intercooler water inlet is provided with an inlet water temperature sensor and an inlet water pressure sensor, and the intercooler water outlet is provided with an outlet water temperature sensor. Thus, by providing the inlet water temperature sensor and the inlet water pressure sensor at the intercooler water inlet, the inlet water temperature and the inlet water pressure of the cooling water entering the intercooler and the water cooler can be monitored in real time to determine whether the magnetic levitation centrifugal air compressor of the present invention has met the startup conditions; and by providing the outlet water temperature sensor at the intercooler water outlet, the temperature of the cooling water discharged from the intercooler and the water cooler can be monitored in real time.

[0009] Preferably, an air filter, an intake air temperature sensor, and an intake air pressure transmitter are provided at the air inlet of the compressor main unit, and the intake air temperature sensor and the intake air pressure transmitter are located between the air inlet of the compressor main unit and the air filter. Thus, by providing an air filter at the air inlet of the compressor main unit, the air entering the compressor main unit can be filtered, removing impurities such as moisture and dust from the air, thereby improving the dryness and cleanliness of the compressed air produced by the magnetic levitation centrifugal air compressor of the present invention and preventing impurities in the air from entering the compressor main unit and causing damage to the compressor main unit. By providing an intake air temperature sensor and an intake air pressure transmitter between the air inlet of the compressor main unit and the air filter, the intake air temperature sensor and the intake air pressure transmitter can be used to monitor the temperature and pressure of the air entering the compressor main unit through the air inlet in real time, facilitating control and adjustment.

[0010] Preferably, the secondary exhaust port of the compressor unit is connected to an air supply pipe, which is equipped with a check valve and an air supply pressure sensor, and the air supply pressure sensor is located near the secondary exhaust port of the compressor unit. Thus, by installing the check valve and air supply pressure sensor on the air supply pipe connected to the secondary exhaust port of the compressor unit, the air supply pressure sensor can be used to monitor in real time the pressure of the compressed air output by the compressor unit and supplied to the user end. The check valve can also be used to prevent compressed air in the air supply pipe from flowing back into the compressor unit through the secondary exhaust port, thereby affecting the operation of the compressor unit.

[0011] Furthermore, a discharge branch pipe is provided on the air supply pipe, which is connected to the air supply pipe near the check valve. A discharge muffler, a discharge regulating valve and a vent valve are provided on the discharge branch pipe, and the discharge muffler is located at the discharge end of the discharge branch pipe, and the discharge regulating valve and the vent valve are arranged in parallel. In this way, during the operation of the magnetic levitation centrifugal air compressor of the present invention, the discharge regulating valve can be used to discharge the compressed air in the air supply pipe, and the air pressure at the secondary exhaust port of the compression host can be adjusted to avoid the magnetic levitation centrifugal air compressor of the present invention from surging due to the pressure buildup at the secondary exhaust port of the compression host; when the magnetic levitation centrifugal air compressor of the present invention is shut down, the discharge valve can be used to timely discharge the compressed air inside the magnetic levitation centrifugal air compressor of the present invention into the atmosphere, so as to prevent the magnetic levitation centrifugal air compressor of the present invention from surging when the discharge regulating valve is not fully opened; when the discharge regulating valve or the discharge valve is used to discharge the compressed air in the air supply pipe into the atmosphere, a discharge muffler can be used to mute the air and reduce the noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural principle diagram of the magnetic levitation centrifugal air compressor of the utility model. DETAILED DESCRIPTION

[0013] Next, combine Figure 1 , the magnetic levitation centrifugal air compressor of the utility model is described in detail.

[0014] like Figure 1As shown, the magnetic levitation centrifugal air compressor of the present invention includes a compressor main unit 1 and an intercooler 2. The compressor main unit 1 is a magnetic levitation centrifugal compressor main unit. The first-stage air outlet 11 of the compressor main unit 1 is connected to the intercooler air inlet 21 of the intercooler 2 via a first-stage exhaust main pipe, and the intercooler air outlet 22 of the intercooler 2 is connected to the secondary air inlet 12 of the compressor main unit 1 via a secondary air inlet pipe. A first-stage exhaust branch pipe connected in parallel with the intercooler 2 is connected between the first-stage air outlet 11 of the compressor main unit 1 and the secondary air inlet 12 of the compressor main unit 1, and a temperature regulating valve 3 is provided on the first-stage exhaust branch pipe. In normal operation, the high-temperature compressed air discharged from the first-stage air outlet 11 of the compressor main unit 1 first enters the intercooler 2 for cooling treatment to obtain cooled compressed air. The cooled compressed air enters the compressor main unit 1 through the secondary air inlet 12 of the compressor main unit 1 for secondary compression, and is then discharged from the secondary exhaust port 13 of the compressor main unit 1 and supplied to the user end. In order to increase the temperature of the compressed air supplied to the user end, in the magnetic levitation centrifugal air compressor of the present invention, the first-level air outlet 11 and the second-level air inlet 12 of the compression main unit 1 are connected through a first-level exhaust branch pipe, and the first-level exhaust branch pipe is provided with a temperature regulating valve 3 for controlling the on-off. In this way, when the compressed air output by the magnetic levitation centrifugal air compressor of the present invention in the normal working state cannot meet the user's use requirements due to low temperature, the temperature regulating valve 3 can be opened and the opening of the temperature regulating valve 3 can be adjusted as needed, so that the high-temperature compressed air discharged from the first-level air outlet 11 of the compression main unit 1 is directly transported to the compression main unit 1 through the first-level exhaust branch pipe and then compressed twice, that is, the temperature of the compressed air output by the compression main unit 1 is increased by using the temperature of the high-temperature compressed air to meet the user's use requirements. It can be seen from this that when using the magnetic levitation centrifugal air compressor of the present invention to produce compressed air, there is no need to install a heater to meet the user's temperature requirements for compressed air, which can save energy consumption and reduce the cost of use. Preferably, a first temperature sensor 41 is provided on the secondary air intake pipe, and the first temperature sensor 41 is located at the secondary air intake port 12 of the compression main unit 1; a second temperature sensor 42 is provided at the secondary exhaust port 13 of the compression main unit 1; a third temperature sensor 43 is provided on the primary exhaust branch pipe, and the third temperature sensor 43 is located at the inlet of the temperature regulating valve 3; a fourth temperature sensor 44 is provided on the secondary air intake pipe, and the fourth temperature sensor 44 is close to the intercooler outlet 22 of the intercooler 2.Thus, during the operation of the magnetic levitation centrifugal air compressor of the present invention, the temperature of the compressed air entering the compression main unit 1 for secondary compression from the secondary air inlet 12 of the compression main unit 1 can be monitored in real time by the first temperature sensor 41, the temperature of the high-temperature compressed air discharged from the secondary exhaust port 13 of the compression main unit 1 and supplied to the user end can be monitored in real time by the second temperature sensor 42, the temperature of the compressed air output from the compression main unit 1 and supplied to the user end can be monitored in real time by the third temperature sensor 43, and the temperature of the compressed air cooled by the intercooler 2 can be monitored in real time by the fourth temperature sensor 44, so that the user can adjust the opening of the temperature regulating valve 3 in real time as needed, thereby meeting the temperature requirements of the compressed air produced by the magnetic levitation centrifugal air compressor of the present invention. Preferably, the first temperature sensor 41, the second temperature sensor 42, the third temperature sensor 43 and the fourth temperature sensor 44 are electrically connected to the central control system (not shown in the figure), and the central control system adjusts the opening of the temperature regulating valve 3 according to the temperatures detected by the first temperature sensor 41, the second temperature sensor 42, the third temperature sensor 43 and the fourth temperature sensor 44. Thus, during the operation of the magnetic levitation centrifugal air compressor of the present invention, the central control system can automatically adjust the opening of the temperature control valve 3 based on the temperature data monitored in real time by the first temperature sensor 41, the second temperature sensor 42, the third temperature sensor 43, and the fourth temperature sensor 44. This is convenient to use and has high control accuracy. Preferably, a butterfly valve can be selected as the temperature control valve 3, which is simple and convenient to select and control.

[0015] like Figure 1As shown, the magnetic levitation centrifugal air compressor of the present invention is provided with a water cooler 5, a liquid storage tank 6 and a reflux pump 7, wherein the return water inlet 51 of the water cooler 5 is connected to the drain port 14 of the compressor main unit 1, the return water outlet 52 of the water cooler 5 is connected through the liquid storage inlet 61 of the liquid storage tank 6, the liquid storage outlet 62 of the liquid storage tank 6 is connected to the inlet of the reflux pump 7, and the outlet of the reflux pump 7 is connected to the return water inlet 15 of the compressor main unit 1. In this way, during the operation of the magnetic levitation centrifugal air compressor of the present invention, the water cooler 5, the liquid storage tank 6 and the reflux pump 7 can be used to form a water cooling system of the compressor main unit 1, which cooperates with the compressor main unit 1 to form a closed internal loop, so that the water cooler 5 can be used to cool the coolant entering the compressor main unit 1, so that the coolant in the magnetic levitation centrifugal air compressor of the present invention can be recycled, reducing the consumption of coolant. Preferably, the water-cooled outlet 53 of the water cooler 5 is connected to the intercooled outlet 23 of the intercooler 2, and the water-cooled inlet 54 of the water cooler 5 is connected to the intercooled inlet 24 of the intercooler 2. In this way, the water cooler 5 and the intercooler 2 can share a water inlet and a drain, which can simplify the arrangement of the water inlet and drain in the magnetic levitation air compressor of the present invention. Preferably, an inlet water temperature sensor 45 and an inlet water pressure sensor 46 are provided at the intercooled inlet 24 of the intercooler 2, and an outlet water temperature sensor 47 is provided at the intercooled outlet 23 of the intercooler 2. Thus, a water inlet temperature sensor 45 and a water inlet pressure sensor 46 are provided at the intercooler water inlet 24 of the intercooler 2 to monitor the inlet temperature and pressure of the cooling water entering the intercooler 2 and the water cooler 5 in real time, thereby determining whether the magnetic levitation centrifugal air compressor of the present invention has met the startup conditions. A water outlet temperature sensor 47 is provided at the intercooler water outlet 23 of the intercooler 2 to monitor the temperature of the cooling water discharged from the intercooler 2 and the water cooler 5 in real time. Preferably, a liquid storage tank 6 is provided with a liquid storage pressure gauge 48 and a liquid storage temperature sensor 49. Thus, the liquid storage pressure gauge 48 and liquid storage temperature sensor 49 can be used to monitor the pressure and temperature of the coolant in the liquid storage tank 6 in real time, thereby adjusting the temperature of the cooled coolant by adjusting the inlet pressure and temperature of the cooling water used to cool the internal circulation coolant in the water cooler 5, thereby meeting the cooling requirements of the internal circulation of the magnetic levitation air compressor of the present invention.

[0016] like Figure 1As shown, in the magnetic levitation centrifugal air compressor of the present invention, an air filter 71, an intake air temperature sensor 72, and an intake air pressure transmitter 73 are provided at the air inlet 16 of the compressor main unit 1, and the intake air temperature sensor 72 and the intake air pressure transmitter 73 are located between the air inlet 16 of the compressor main unit 1 and the air filter 71. In this way, the air filter 71 is provided at the air inlet 16 of the compressor main unit 1 to filter the air entering the compressor main unit 1, remove impurities such as moisture and dust in the air, improve the dryness and cleanliness of the compressed air produced by the magnetic levitation centrifugal air compressor of the present invention, and prevent impurities in the air from entering the compressor main unit 1 and causing damage to the compressor main unit 1; the intake air temperature sensor 72 and the intake air pressure transmitter 73 are provided between the air inlet 16 of the compressor main unit 1 and the air filter 71, and the intake air temperature sensor 72 and the intake air pressure transmitter 73 can be used to monitor the temperature and pressure of the air entering the compressor main unit 1 through the air inlet in real time, facilitating control and adjustment.

[0017] like Figure 1 As shown, in the magnetically levitated centrifugal air compressor of the present invention, an air supply pipe is connected to the secondary exhaust port 13 of the compressor main unit 1. A check valve 81 and an air supply pressure sensor 82 are provided on the air supply pipe, and the air supply pressure sensor 82 is located near the secondary exhaust port 13 of the compressor main unit 1. Thus, by providing the check valve 81 and the air supply pressure sensor 82 on the air supply pipe connected to the secondary exhaust port 13 of the compressor main unit 1, the air supply pressure sensor 82 can be used to monitor in real time the pressure of the compressed air output by the compressor main unit 1 and supplied to the user end. Furthermore, the check valve 81 can be used to prevent the compressed air in the air supply pipe from flowing back into the compressor main unit 1 through the secondary exhaust port 13, thereby affecting the operation of the compressor main unit 1. Preferably, a discharge branch pipe is provided on the air supply pipe, which is connected to the air supply pipe near the check valve 81. A discharge muffler 83, a discharge regulating valve 84 and a vent valve 85 are provided on the discharge branch pipe, and the discharge muffler 83 is located at the discharge end of the discharge branch pipe, and the discharge regulating valve 84 and the vent valve 85 are arranged in parallel. In this way, during the operation of the magnetic levitation centrifugal air compressor of the present invention, the compressed air in the air supply pipe can be discharged by using the discharge regulating valve 84 to regulate the air pressure at the secondary exhaust port 13 of the compressor main unit 1, thereby preventing the magnetic levitation centrifugal air compressor of the present invention from surging due to the pressure buildup at the secondary exhaust port of the compressor main unit; when the magnetic levitation centrifugal air compressor of the present invention is shut down, the compressed air inside the magnetic levitation centrifugal air compressor of the present invention can be discharged into the atmosphere in time by using the discharge regulating valve 85 to prevent the magnetic levitation centrifugal air compressor of the present invention from surging when the discharge regulating valve 84 is not fully opened; when the compressed air in the air supply pipe is discharged into the atmosphere by using the discharge regulating valve 84 or the discharge valve 85, the discharge muffler 83 can be used to mute the air and reduce the noise. Preferably, the discharge regulating valve 84 can be a butterfly valve, which is simple and convenient to select and control.

[0018] The utility model magnetic levitation centrifugal 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 rate and pressure of the gas after passing through the impeller are increased, and compressed air is continuously produced.

[0019] Before powering on:

[0020] The water inlet temperature sensor 45 and the water inlet pressure sensor 46 are used to detect in real time whether the water inlet temperature and water inlet pressure of the coolant (such as water) entering the magnetic levitation centrifugal air compressor of the present invention meet the startup conditions (such as: water inlet pressure ≥1.5bar, water inlet temperature ≤32℃). When any one of the water inlet pressure and water inlet temperature does not meet the set startup conditions, the magnetic levitation centrifugal air compressor of the present invention cannot be started, and at the same time, the temperature conditions are displayed on the control panel of the magnetic levitation centrifugal air compressor of the present invention to facilitate adjustment and maintenance by operators and maintenance personnel.

[0021] When booting:

[0022] The reflux pump 7 works first, transporting the antifreeze (such as ethylene glycol) in the liquid storage tank 6 to the internal circulation of the motor casing of the compressor main unit 1, taking away the heat inside the motor, and exchanging heat with the cooling water in the water cooler 5 to reduce the temperature, and then returning to the liquid storage tank 6, thus repeating the cycle.

[0023] During the operation of the water cooling system of the compression main unit 1 formed by the water cooler 5, the liquid storage tank 6 and the reflux pump 7, the motor shaft in the compression main unit 1 will be in a suspended state along with the magnetic levitation bearing, and the first fan 86 and the second fan 87 will work to blow air to cool the inside of the motor; the third fan 88 will work to take away the heat inside the chassis of the magnetic levitation centrifugal air compressor of the present invention, the vent valve 85 will be closed, and the discharge regulating valve 84 will be in a fully open state, and the compression main unit 1 in the magnetic levitation centrifugal air compressor of the present invention will start to work.

[0024] During the operation of the magnetic levitation centrifugal air compressor of the present invention, the gas operation process is as follows:

[0025] After being filtered by the air filter 71, the air in the atmosphere enters the primary compression chamber in the compressor main unit 1 for primary compression, obtaining high-temperature, low-pressure primary compressed air. This high-temperature, low-pressure primary compressed air is then discharged through the primary air outlet 11, i.e., the primary volute, on the compressor main unit 1. When the temperature of the compressed air discharged from the compressor main unit 1 and supplied to the user end meets the user's usage requirements, and the temperature regulating valve 3 is in the closed state, the high-temperature, low-pressure primary compressed air is transported through the primary exhaust main pipe to the intercooler 2 for cooling, obtaining low-temperature, low-pressure primary compressed air. This low-temperature, low-pressure primary compressed air is then transported through the secondary air inlet pipe to the compressor main unit 1 for secondary compression, obtaining high-temperature, high-pressure secondary compressed air. This high-temperature, high-pressure secondary compressed air is then discharged through the secondary exhaust port 13 of the compressor main unit 1 and supplied to the user end. When the temperature of the compressed air discharged from the compressor main unit 1 and supplied to the user end is lower than the user's usage requirements, the temperature regulating valve 3 opens, and a portion of the high-temperature, low-pressure first-stage compressed air is transported through the first-stage exhaust main pipe to the intercooler 2 for cooling, obtaining low-temperature, low-pressure first-stage compressed air. This low-temperature, low-pressure first-stage compressed air is then transported to the compressor main unit 1 through the second-stage intake pipe; a portion of the high-temperature, low-pressure first-stage compressed air is directly transported to the compressor main unit 1 through the first-stage exhaust branch pipe; the low-temperature, low-pressure first-stage compressed air and the high-temperature, low-pressure first-stage compressed air entering the compressor main unit 1 undergo secondary compression in the compressor main unit 1 to obtain high-temperature, high-pressure secondary compressed air. The high-temperature, high-pressure secondary compressed air discharged from the compressor main unit 1, i.e., the compressed air, passes through the check valve and is supplied to the user end. During the operation of the magnetic levitation centrifugal air compressor of the present invention, the central control system can control the opening of the temperature regulating valve 3 according to the temperature data monitored in real time by the first temperature sensor 41, the second temperature sensor 42, the third temperature sensor 43 and the fourth temperature sensor 44, that is, adjust the proportion of the high-temperature and low-pressure first-level compressed air directly delivered to the compression host 1 through the first-level exhaust branch pipe, so that the temperature of the compressed air discharged from the second-level exhaust port 13 of the compression host 1 and supplied to the user end meets the user's usage requirements.

[0026] During the operation of the magnetic levitation centrifugal air compressor of the present invention, when the air temperature and air pressure in the air supply pipe at the secondary exhaust port of the compressor main unit 1 are too high, in order to prevent the magnetic levitation centrifugal air compressor of the present invention from surging due to the pressure buildup at the secondary exhaust port 13 of the compressor main unit 1, a portion of the high-temperature and high-pressure secondary compressed air is discharged into the atmosphere through the discharge branch pipe and the discharge regulating valve 84, and during the process of the frequency of the motor in the compressor main unit 1 increasing, the discharge regulating valve 84 is gradually closed until the air temperature and air pressure at the secondary compression exhaust port 13 reach the set value, and the discharge regulating valve 84 is completely closed. In addition, during the operation of the magnetic levitation centrifugal air compressor of the present invention, the central control system controls the discharge regulating valve 84 to open to an appropriate size according to the system pressure of the magnetic levitation centrifugal air compressor of the present invention, ensuring that the motor in the compressor main unit 1 operates at the lowest lower limit frequency and does not surge, and the excess compressed air in the magnetic levitation centrifugal air compressor of the present invention is discharged into the atmosphere.

[0027] During operation, the magnetic levitation centrifugal air compressor of the present invention receives cooling water in two separate routes, entering the intercooler 2 and the water cooler 5. The cooling water discharged from the intercooler 2 and the water cooler 5 is then combined and discharged to the exterior of the magnetic levitation centrifugal air compressor. The cooling water entering the intercooler 2 undergoes heat exchange with the high-temperature, low-pressure primary compressed air within the intercooler 2; the cooling water entering the water cooler 5 undergoes heat exchange with the internal circulating medium (ethylene glycol antifreeze) within the water cooler 5.

[0028] During shutdown:

[0029] The first fan 86, the second fan 87, the third fan 88 and the reflux pump 7 stop working, the temperature regulating valve 3 is closed, the vent valve 85 is opened, the valve degree of the discharge regulating valve 84 is continuously opened according to the surge line of the compression host 1, and the motor of the compression host 1 gradually reduces the frequency; until the discharge regulating valve 84 is fully opened and the frequency of the motor of the compression host 1 is zero, the magnetic levitation centrifugal air compressor of the present invention 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 centrifugal air compressor of the present invention is in a completely stopped state.

[0030] In addition, after the magnetic levitation centrifugal air compressor of the present invention is started, the central control system 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 operating conditions of the user end, thereby achieving energy saving; when the gas consumption at the user end is relatively low, the central control system can be used to open the discharge regulating valve 84 according to the performance curve of the compression host 1 to discharge excess gas and prevent the compression host 1 from sending surge.

Claims

1. A magnetic levitation centrifugal air compressor, characterized in that: The magnetic levitation centrifugal air compressor includes a compression main unit and an intercooler. The first-level air outlet of the compression main unit is connected to the intercooler air inlet of the intercooler through a first-level exhaust main pipe, and the intercooler air outlet of the intercooler is connected to the secondary air inlet of the compression main unit through a secondary air inlet pipe; a first-level exhaust branch pipe connected in parallel with the intercooler is connected between the first-level air outlet of the compression main unit and the secondary air inlet of the compression main unit, and a temperature regulating valve is provided on the first-level exhaust branch pipe.

2. The magnetic levitation centrifugal air compressor according to claim 1, characterized in that: A first temperature sensor is provided on the secondary air intake pipe, and the first temperature sensor is located at the secondary air intake of the compression main unit; a second temperature sensor is provided at the secondary exhaust port of the compression main unit; a third temperature sensor is provided on the primary exhaust branch pipe, and the third temperature sensor is located at the inlet of the temperature regulating valve; a fourth temperature sensor is provided on the secondary air intake pipe, and the fourth temperature sensor is close to the intercooler outlet.

3. The magnetic levitation centrifugal air compressor according to claim 2, characterized in that: The first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor are electrically connected to a central control system, and the central control system adjusts the opening of the temperature control valve according to the temperatures detected by the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor.

4. The magnetic levitation centrifugal air compressor according to any one of claims 1 to 3, characterized in that: The magnetic levitation centrifugal air compressor is provided with a water cooler, a liquid storage tank and a reflux pump. The return water inlet of the water cooler is connected to the drain outlet of the compression main unit, the return water outlet of the water cooler is connected through the liquid storage inlet of the liquid storage tank, the liquid storage outlet of the liquid storage tank is connected to the inlet of the reflux pump, and the outlet of the reflux pump is connected to the return water port of the compression main unit.

5. The magnetic levitation centrifugal air compressor according to claim 4, characterized in that: The water cooling outlet of the water cooler is communicated with the intercooling outlet of the intercooler, and the water cooling inlet of the water cooler is communicated with the intercooling inlet of the intercooler.

6. The magnetic levitation centrifugal air compressor according to claim 5, characterized in that: An inlet water temperature sensor and an inlet water pressure sensor are provided at the intercooler water inlet of the intercooler, and an outlet water temperature sensor is provided at the intercooler water outlet of the intercooler.

7. The magnetic levitation centrifugal air compressor according to any one of claims 1 to 3, characterized in that: An air filter, an intake air temperature sensor and an intake air pressure transmitter are provided at the air inlet of the compression main unit, and the intake air temperature sensor and the intake air pressure transmitter are located between the air inlet of the compression main unit and the air filter.

8. The magnetic levitation centrifugal air compressor according to any one of claims 1 to 3, characterized in that: The secondary exhaust port of the compression main unit is connected to an air supply pipe, on which a check valve and an air supply pressure sensor are provided, and the air supply pressure sensor is close to the secondary exhaust port of the compression main unit.

9. The magnetic levitation centrifugal air compressor according to claim 8, characterized in that: The air supply pipe is provided with a discharge branch pipe, which is connected to the air supply pipe near the check valve. The discharge branch pipe is provided with a discharge muffler, a discharge regulating valve and a vent valve, and the discharge muffler is located at the discharge end of the discharge branch pipe. The discharge regulating valve and the vent valve are arranged in parallel.

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