Marine refrigeration compressor driving system and method based on magnetic coupler

Abstract

The invention discloses a marine refrigeration compressor driving system capable of transmitting torque across the air based on a magnetic coupler, the marine refrigeration compressor driving system comprises the magnetic coupler, a motor, a refrigeration compressor, a controller and a power supply, the controller controls the power supply to be turned on or turned off, the power supply supplies power to the motor, and the motor drives the refrigeration compressor. The magnetic coupler comprises a driving end rotor and a load end rotor, the driving end rotor is installed at the output end of the motor, the load end rotor is installed in the refrigeration compressor, the driving rotor end and the load end rotor in the refrigeration compressor are located on the same axis, and a gap exists between the motor driving rotor end and the refrigeration compressor. According to the open-type refrigeration compressor shaft seal non-contact torque transmission device, torque non-contact transmission is achieved by applying the magnetic coupler, the situation that normal operation of equipment is affected by refrigerant leakage caused by shaft seal failure of an open-type refrigeration compressor is avoided, the risk of system shutdown caused by shaft seal failure is reduced through non-contact torque transmission of a magnetic field, and the service life of the system is prolonged. And the overall operation reliability of the marine refrigeration compressor unit is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of shipbuilding, and in particular relates to a marine refrigeration compressor driving system and a driving method based on a magnetic coupling. Background Art

[0002] Open-type refrigeration compressors have the advantages of simple structure, low procurement cost, low maintenance cost and high equipment reliability. They are widely used in marine refrigeration devices. However, the transmission of torque of existing open-type refrigeration compressors usually relies on direct mechanical connection, that is, the motor is connected and the torque is transmitted to the crankshaft extending outside the compressor. They cannot be completely sealed. In order to prevent the refrigerant from leaking out of the compressor, a shaft seal component must be installed at the connection between the compressor and the motor to ensure sealing. However, the sealing performance of the shaft seal component is affected by temperature, pressure and the properties of the refrigerant medium. It is difficult to achieve a completely sealed effect in practical applications. In addition, during the operation of the equipment, the shaft seal component needs to be tested by harsh working environments such as high-speed rotation, high temperature and high pressure, and corrosion of the refrigerant. Its sealing performance is seriously challenged. Once the seal of the shaft seal component fails, the leakage of the refrigerant not only affects the normal operation of the refrigeration system, but also poses a potential threat to the environment and human body. The regular replacement and maintenance of the shaft seal component requires highly professional and skilled personnel, which not only increases the operating cost of the ship, but also reduces the reliability of the refrigeration system. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art and to provide a marine refrigeration compressor drive system and drive method based on a magnetic coupling. The present invention realizes the transmission of torque through air by using a magnetic coupling, thereby avoiding the leakage of refrigerant caused by the failure of the shaft seal of the open refrigeration compressor and affecting the normal operation of the equipment. The present invention reduces the risk of system shutdown caused by shaft seal failure through contactless torque transmission of the magnetic field, thereby improving the reliability of the overall operation of the marine refrigeration compressor unit.

[0004] In order to achieve the above invention purpose, the technical solution provided by the present invention is as follows:

[0005] A driving system for a marine refrigeration compressor based on a magnetic coupling for transmitting torque through air, the system comprising a magnetic coupling, a motor, a refrigeration compressor, a controller and a power supply, the controller controlling the power supply to be turned on or off, the power supply supplying power to the motor, the motor driving the refrigeration compressor, the magnetic coupling comprising a drive end rotor and a load end rotor, the drive end rotor being mounted at the motor output end, the load end rotor being mounted in the refrigeration compressor, the drive rotor end and the load end rotor in the refrigeration compressor being on the same axis, and a gap being present between the motor drive rotor end and the refrigeration compressor.

[0006] Furthermore, the motor output end and the driving end rotor are fixedly connected via a coupling.

[0007] Furthermore, a load-end rotor is installed at one end of the crankshaft in the refrigeration compressor, and the load-end rotor is fixedly connected to the crankshaft through a coupling, and the end of the crankshaft provided with the load-end rotor is close to the output end of the motor.

[0008] Furthermore, a shell is arranged outside the refrigeration compressor, the shell wraps the refrigeration compressor, and the shell is made of aluminum alloy with ultra-low magnetic permeability.

[0009] A driving method for a marine refrigeration compressor based on a magnetic coupling, the method specifically comprising the following steps:

[0010] S1, prepare a driving system for a marine refrigeration compressor based on a magnetic coupling for transmitting torque through air, the system comprising a magnetic coupling, a motor, a refrigeration compressor, a controller and a power supply, the controller controls the power supply to be turned on or off, the power supply supplies power to the motor, the motor drives the refrigeration compressor, the magnetic coupling comprises a driving end rotor and a load end rotor, the driving end rotor is installed at the output end of the motor, the load end rotor is installed in the refrigeration compressor, the driving rotor end and the load end rotor in the refrigeration compressor are on the same axis, and there is a gap between the motor driving rotor end and the refrigeration compressor;

[0011] S2, after the drive end rotor at the motor output end and the load end rotor in the refrigeration compressor are installed, adjust the drive end rotor at the motor output end and the load end rotor in the refrigeration compressor to be on the same axis;

[0012] S3, the controller controls the power supply to the motor, the motor output end drives the driving end rotor to rotate, through the principle of magnetic coupling to transmit torque through the air, the driving end rotor drives the load end rotor encapsulated in the crankshaft end of the refrigeration compressor to rotate, so that the refrigeration compressor works and the refrigeration compressor is driven.

[0013] Based on the above technical solution, the present invention patent, a marine refrigeration compressor drive system and drive method based on magnetic coupling, has achieved the following technical advantages through practical application:

[0014] 1. The present invention discloses a marine refrigeration compressor driving system based on a magnetic coupling, which realizes the transmission of torque through air by using a magnetic coupling, thereby avoiding the leakage of refrigerant caused by the failure of the shaft seal of the open refrigeration compressor and affecting the normal operation of the equipment. The present invention reduces the risk of system shutdown caused by shaft seal failure through contactless torque transmission of the magnetic field, and improves the reliability of the overall operation of the marine refrigeration compressor unit.

[0015] 2. The marine refrigeration compressor drive system based on the magnetic coupling of the present invention realizes the transmission of torque through the air by applying the magnetic coupling. There is no mechanical contact during the torque transmission process, thereby eliminating the maintenance requirements caused by shaft seal wear and simplifying the inspection process and maintenance workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a structural diagram of a driving system in a marine refrigeration compressor driving system based on a magnetic coupling. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific examples shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0018] like Figure 1 The present invention belongs to a driving system for a marine refrigeration compressor based on a magnetic coupling for transmitting torque through air. The system includes a magnetic coupling, a motor 5, a refrigeration compressor 2, a controller 6 and a power supply 7. The controller 6 uses Siemens SIMATIC S7-1500 to control the power supply 7 to be turned on or off. The power supply 7 supplies power to the motor 5. The motor 5 drives the refrigeration compressor 2. The magnetic coupling includes a driving end rotor 4 and a load end rotor 1. The driving end rotor 4 is installed at the output end of the motor 5, and the load end rotor 1 is installed in the refrigeration compressor 2. The driving rotor end and the load end rotor 1 in the refrigeration compressor 2 are on the same axis, and there is a gap between the driving rotor end of the motor 5 and the refrigeration compressor 2. The magnetic coupling is used to realize the transmission of torque through air, so as to avoid the leakage of refrigerant caused by the failure of the shaft seal of the open refrigeration compressor 2 and affect the normal operation of the equipment. The present invention reduces the risk of system shutdown caused by shaft seal failure through contactless torque transmission of the magnetic field, and improves the reliability of the overall operation of the marine refrigeration compressor 2.

[0019] The output end of the motor 5 is fixedly connected to the driving end rotor 4 via a coupling.

[0020] A load-end rotor 1 is installed at one end of the crankshaft 3 in the refrigeration compressor 2, and the load-end rotor 1 is fixedly connected to the crankshaft 3 through a coupling. One end of the crankshaft 3 provided with the load-end rotor 1 is close to the output end of the motor 5; the connection method between the output end of the motor 5 and the drive-end rotor 4 and the crankshaft 3 and the load-end rotor 1 can also be connected by mechanical connection or other transmission components.

[0021] A shell is arranged outside the refrigeration compressor 2, and the shell wraps the refrigeration compressor 2. The shell is made of an aluminum alloy with ultra-low magnetic permeability. The shell is made of an aluminum alloy with ultra-low magnetic permeability, which reduces interference with the magnetic field of the magnetic coupler on both sides of the shell, thereby meeting the normal working requirements of the refrigeration compressor 2.

[0022] A driving method for a marine refrigeration compressor based on a magnetic coupling, the method specifically comprising the following steps:

[0023] S1, prepare a driving system for a marine refrigeration compressor based on a magnetic coupling for transmitting torque through air, the system comprising a magnetic coupling, a motor 5, a refrigeration compressor 2, a controller 6 and a power supply 7, the controller 6 controls the power supply 7 to be turned on or off, the power supply 7 supplies power to the motor 5, the motor 5 drives the refrigeration compressor 2, the magnetic coupling comprises a driving end rotor 4 and a load end rotor 1, the driving end rotor 4 is mounted at the output end of the motor 5, the load end rotor 1 is mounted in the refrigeration compressor 2, the driving rotor end and the load end rotor 1 in the refrigeration compressor 2 are on the same axis, and there is a gap between the driving rotor end of the motor 5 and the refrigeration compressor 2;

[0024] S2, after the drive end rotor 4 at the output end of the motor 5 and the load end rotor 1 in the refrigeration compressor 2 are installed, adjust the drive end rotor 4 at the output end of the motor 5 and the load end rotor 1 in the refrigeration compressor 2 to be on the same axis;

[0025] S3, the controller 6 controls the power supply 7 to supply power to the motor 5, and the output end of the motor 5 drives the driving end rotor 4 to rotate. Through the principle of torque transmission through the air by the magnetic coupling, the driving end rotor 4 drives the load end rotor 1 encapsulated at the end of the crankshaft 3 inside the refrigeration compressor 2 to rotate, so that the refrigeration compressor 2 works and the driving of the refrigeration compressor 2 is completed.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A driving system for a marine refrigeration compressor based on a magnetic coupling for transmitting torque through air. It is characterized in that The system includes a magnetic coupler, a motor, a refrigeration compressor, a controller and a power supply. The controller controls the power supply to be turned on or off. The power supply supplies power to the motor. The motor drives the refrigeration compressor. The magnetic coupler includes a drive end rotor and a load end rotor. The drive end rotor is installed at the output end of the motor, and the load end rotor is installed in the refrigeration compressor. The drive rotor end and the load end rotor in the refrigeration compressor are on the same axis, and there is a gap between the motor drive rotor end and the refrigeration compressor.

2. A driving system for a marine refrigeration compressor based on a magnetic coupling for transmitting torque through air according to claim 1, It is characterized in that The motor output end and the driving end rotor are fixedly connected via a coupling.

3. A driving system for a marine refrigeration compressor based on a magnetic coupling for transmitting torque through air according to claim 1, It is characterized in that A load-end rotor is installed at one end of the crankshaft in the refrigeration compressor. The load-end rotor is fixedly connected to the crankshaft through a coupling. One end of the crankshaft provided with the load-end rotor is close to the output end of the motor.

4. A driving system for a marine refrigeration compressor based on a magnetic coupling for transmitting torque through air according to claim 3, It is characterized in that A shell is arranged outside the refrigeration compressor, the shell wraps the refrigeration compressor, and the shell is made of aluminum alloy with ultra-low magnetic permeability.

5. A driving method for a marine refrigeration compressor based on a magnetic coupling, It is characterized in that The method specifically comprises the following steps: S1, prepare a driving system for a marine refrigeration compressor based on a magnetic coupling for transmitting torque through air, the system comprising a magnetic coupling, a motor, a refrigeration compressor, a controller and a power supply, the controller controls the power supply to be turned on or off, the power supply supplies power to the motor, the motor drives the refrigeration compressor, the magnetic coupling comprises a driving end rotor and a load end rotor, the driving end rotor is installed at the output end of the motor, the load end rotor is installed in the refrigeration compressor, the driving rotor end and the load end rotor in the refrigeration compressor are on the same axis, and there is a gap between the motor driving rotor end and the refrigeration compressor; S2, after the drive end rotor at the motor output end and the load end rotor in the refrigeration compressor are installed, adjust the drive end rotor at the motor output end and the load end rotor in the refrigeration compressor to be on the same axis; S3, the controller controls the power supply to the motor, the motor output end drives the driving end rotor to rotate, through the principle of magnetic coupling to transmit torque through the air, the driving end rotor drives the load end rotor encapsulated in the crankshaft end of the refrigeration compressor to rotate, so that the refrigeration compressor works and the refrigeration compressor is driven.

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