Magnetic suspension air compressor applied to variable working conditions

Abstract

The invention belongs to the technical field of air compressor equipment, and particularly relates to a magnetic suspension air compressor applied to variable working conditions, which comprises a main machine cabinet and a control cabinet, a frequency converter and a PLC (programmable logic controller) are arranged in the control cabinet, a magnetic suspension main machine is fixedly mounted in the main machine cabinet, and an air inlet pipe and an air outlet pipe are arranged on the magnetic suspension main machine; according to the air compressor, through reasonable design, the defect that an existing air compressor cannot face flow and pressure variable working conditions can be overcome, and the air compressor has great advantages in the aspects of energy conservation and maintenance cost.

Description

Technical Field

[0001] The invention belongs to the technical field of air compressor equipment, and in particular relates to a magnetic suspension air compressor applied under variable working conditions. Background Art

[0002] At present, most of the existing air compressors are still screw type air compressors. Screw air compressors are a type of positive displacement gas compression machinery in which the working volume performs rotational motion. The compression of gas is achieved by the change of volume, which is achieved by a pair of rotors of the compressor performing rotational motion in the casing. It has the disadvantages of high noise, high energy consumption, and the need for regular maintenance and oiling. In particular, when faced with complex working conditions with changing pressure, flow, etc., screw air compressors are unable to cope with them. Summary of the invention

[0003] The main technical problem to be solved by the present invention is to provide a magnetic levitation air compressor for use under variable working conditions, which can overcome the shortcomings of existing air compressors that they cannot cope with variable flow and pressure conditions, and also has great advantages in terms of energy saving and maintenance costs.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: A magnetic levitation air compressor used in variable working conditions comprises a main cabinet and a control cabinet, wherein a frequency converter and a PLC controller are arranged in the control cabinet, a magnetic levitation main machine is fixedly installed in the main cabinet, an air inlet pipe and an air outlet pipe are arranged on the magnetic levitation main machine, an outlet temperature sensor, a pressure sensor and a flow sensor are arranged on the air outlet pipe, the frequency converter is electrically connected to the output end of the PLC controller, the magnetic levitation main machine is electrically connected to the output end of the frequency converter, and the outlet temperature sensor, the pressure sensor and the flow sensor are electrically connected to the input end of the PLC controller.

[0005] The following is a further optimization of the above technical solution by the present invention: The magnetic levitation host is a two-stage compression air compressor.

[0006] Further optimization: A cooling fan is installed in the host cabinet.

[0007] Further optimization: The main cabinet is equipped with an incoming terminal block and a circuit breaker switch.

[0008] Further optimization: A three-piece assembly is installed in the main cabinet, and the three-piece assembly includes a fuse, a reactor and a transformer.

[0009] Further optimization: A touch screen is provided on the control cabinet, and the touch screen is bidirectionally electrically connected to the input end and the output end of the PLC controller.

[0010] Further optimization: A UPS power supply is installed in the control cabinet.

[0011] Further optimization: A sensor installation box is provided in the control cabinet.

[0012] Further optimization: An AC / DC power supply is installed in the control cabinet.

[0013] Further optimization: The control cabinet includes a left control room and a right control room, the frequency converter is arranged in the left control room, and the PLC controller is arranged in the right control room.

[0014] The present invention adopts the above technical solution and has a reasonable structure. The main rotor of the air compressor is a magnetic suspension structure, which is frictionless during rotation and can achieve lower energy consumption and higher rotation speed. After experiments, the main engine speed can reach more than 30,000 revolutions per minute. During operation, the gas undergoes two-stage compression, which can achieve higher pressure and larger flow rate.

[0015] During operation, due to the changing working conditions, the output pressure and flow rate of the air compressor need to be adjusted. Therefore, this magnetic levitation air compressor is designed with a frequency converter and a controller for control. The combined control method of the two can achieve outputs of different pressures and different flow rates. Through real-time monitoring by sensors, real-time control can be performed under different working conditions, making the air compressor more widely used in actual applications. It can be used in more complex application scenarios and has the characteristics of low noise, energy saving, and low maintenance cost.

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a control cabinet in an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a main cabinet in an embodiment of the present invention; Figure 3 Schematic diagram of a control system in an embodiment of the present invention.

[0018] In the figure: 1- frequency converter; 2- PLC controller; 3- UPS power supply; 4- magnetic levitation host; 401- air inlet pipe; 402- air outlet pipe; 5- cooling fan. DETAILED DESCRIPTION

[0019] like Figure 1-3 As shown: A magnetic levitation air compressor used in variable working conditions includes a main cabinet and a control cabinet. A frequency converter 1 and a PLC controller 2 are arranged in the control cabinet. A magnetic levitation main machine 4 is fixedly installed in the main cabinet. An air inlet pipe 401 and an air outlet pipe 402 are arranged on the magnetic levitation main machine 4. An outlet temperature sensor, a pressure sensor and a flow sensor are arranged on the air outlet pipe 402.

[0020] The frequency converter 1 is electrically connected to the output end of the PLC controller 2 , the magnetic levitation host 4 is electrically connected to the output end of the frequency converter 1 , and the outlet temperature sensor, pressure sensor and flow sensor are electrically connected to the input end of the PLC controller 2 .

[0021] With this design, the operation of the magnetic levitation host 4 under various complex working conditions such as constantly changing pressure or flow can be achieved through the control of the inverter 1 and the PLC controller 2. The sensor feeds back information such as temperature, pressure and flow at the outlet pipe 402 to the PLC controller 2 in real time, and is used to transmit the signal of the magnetic levitation host 4 outputting gas to the PLC controller 2 in real time.

[0022] The rotor of the magnetic levitation host 4 is magnetically suspended, and there is no friction during the rotation process, which can achieve lower energy consumption and higher rotation speed.

[0023] The main cabinet and the control cabinet can be close to each other or far away from each other.

[0024] The magnetic levitation main engine 4 is a two-stage compression air compressor, which greatly increases the pressure of the output air and can better meet the use requirements.

[0025] A cooling fan 5 is installed in the mainframe cabinet, and the cooling fan 5 cools down the magnetic suspension mainframe 4 through pipelines.

[0026] The main cabinet is equipped with an incoming terminal block and a circuit breaker switch. After the external power enters the incoming terminal block, it needs to pass through the circuit breaker switch before entering the internal circuit, so as to conveniently cut off the fault circuit, prevent the accident from expanding, and ensure safe operation.

[0027] A three-way assembly is installed in the main cabinet, which includes a fuse, a reactor and a transformer. The strong electricity passes through the three-way assembly and goes to the inverter to provide it with stable current and voltage.

[0028] A top plate is provided in the main unit cabinet at a position above the magnetically suspended main unit 4, so that the noise of the air compressor is reduced when it is emptied.

[0029] A cable trough is set near the top plate of the main cabinet to make the wiring more regular.

[0030] The control cabinet is provided with a touch screen, which is bidirectionally electrically connected to the input and output ends of the PLC controller 2 , and can display various parameters during operation in real time and be used to input and modify various parameters of the PLC controller 2 .

[0031] The control cabinet includes a left control room and a right control room. The frequency converter 1 is arranged in the left control room, and the PLC controller 2 is arranged in the right control room.

[0032] A UPS power supply 3 is provided in the right control room. The UPS power supply 3 is an uninterruptible power supply containing an energy storage device, which is used to provide an uninterruptible power supply to the inverter 1, ensuring that in the event of an accidental power failure of the entire machine, the rotor of the magnetic levitation host 4 will not fall and affect the normal operation of the magnetic levitation host 4.

[0033] A sensor installation box is provided in the right control room.

[0034] The sensor usually includes a sensitive element, a conversion element, a conversion circuit and an auxiliary power supply. The conversion element, the conversion circuit and the auxiliary power supply are integrated and installed in the sensor installation box, making the sensor installation more regular, the adjustment more convenient and the data transmission more reliable.

[0035] A reactor is installed in the left control room to filter the peak voltage.

[0036] An AC / DC power supply is provided in the left control room for outputting DC and AC power.

[0037] For those skilled in the art, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the protection scope of the present invention.

Claims

1. A magnetic levitation air compressor used in variable working conditions, comprising a main cabinet and a control cabinet, characterized in that: A frequency converter (1) and a PLC controller (2) are arranged in the control cabinet, a magnetic suspension host (4) is fixedly installed in the host cabinet, an air inlet pipe (401) and an air outlet pipe (402) are arranged on the magnetic suspension host (4), an outlet temperature sensor, a pressure sensor and a flow sensor are arranged on the air outlet pipe (402), the frequency converter (1) is electrically connected to the output end of the PLC controller (2), the magnetic suspension host (4) is electrically connected to the output end of the frequency converter (1), and the outlet temperature sensor, the pressure sensor and the flow sensor are electrically connected to the input end of the PLC controller (2).

2. The magnetic levitation air compressor used in variable working conditions according to claim 1, characterized in that: The magnetic levitation main engine (4) is a two-stage compression air compressor.

3. The magnetic levitation air compressor used in variable working conditions according to claim 2 is characterized in that: A cooling fan (5) is installed in the main cabinet.

4. The magnetic levitation air compressor used in variable working conditions according to claim 3 is characterized in that: The main cabinet is equipped with an incoming terminal block and a circuit breaker switch.

5. The magnetic levitation air compressor used in variable working conditions according to claim 4 is characterized in that: A three-piece assembly is arranged in the main cabinet, and the three-piece assembly includes a fuse, a reactor and a transformer.

6. The magnetic levitation air compressor used in variable working conditions according to claim 5, characterized in that: A touch screen is provided on the control cabinet, and the touch screen is bidirectionally electrically connected to the input end and the output end of the PLC controller (2).

7. The magnetic levitation air compressor used in variable working conditions according to claim 6 is characterized in that: A UPS power supply (3) is arranged in the control cabinet.

8. The magnetic levitation air compressor used in variable working conditions according to claim 7 is characterized in that: A sensor installation box is provided in the control cabinet.

9. The magnetic levitation air compressor used in variable working conditions according to claim 8, characterized in that: An AC / DC power supply is installed in the control cabinet.

10. The magnetic levitation air compressor used in variable working conditions according to claim 9, characterized in that: The control cabinet comprises a left control room and a right control room. The frequency converter (1) is arranged in the left control room, and the PLC controller (2) is arranged in the right control room.

Images