Transport protection device, rotating machinery unit, compressor unit, refrigeration equipment, and method for transporting rotating machinery.

Abstract

To avoid increasing the size of the device and to protect the bearings during transportation. [Solution] The transport protection device 110 is a transport protection device 110 for a rotating machine 100, which houses a rotating body 20, bearings 35 and 36 that can contact and support the rotating body, and magnetic actuators 31a and 32a that can support the rotating body without contact by generating a magnetic attractive force that causes the rotating body to move away from the bearings, and comprises a current supply unit 201 that supplies current to the magnetic actuators when the rotating machine is being transported, thereby generating magnetic attractive forces F11 and F12 directed from the rotating body towards the bearings, and a control unit 210 that controls the current supply unit.

Description

Technical Field

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[0001] The present disclosure relates to a transport protection device, a rotary machine unit, a compressor unit, a refrigeration device, and a method for transporting a rotary machine.

Background Art

[0002] For example, there is known a magnetic bearing device including a pair of axial-direction control electromagnets that perform position control in the rotational axis direction with respect to a drive shaft that rotates at high speed by a high-frequency motor and is provided with protective ball bearings above and below, and two pairs of radial-direction control electromagnets that perform position control in two axial directions orthogonal to each other at two points on the rotational axis (see Patent Document 1). The magnetic bearing device includes a displacement detection sensor that detects displacement of the drive shaft that rotates at high speed. The magnetic bearing device feeds back a signal from the displacement detection sensor to the control unit of the magnetic bearing, and adjusts the attractive force of the electromagnet by controlling the excitation current of the electromagnet, thereby holding the position of the drive shaft within a predetermined range. The magnetic bearing device includes a permanent magnet arranged only at a specific phase in the radial direction, adjacent to the radial-direction electromagnet.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the prior art, since a permanent magnet is provided, there is a risk that the device will become larger in size.

[0005] An object of the present disclosure is to provide a transport protection device, a rotary machine unit, a compressor unit, a refrigeration device, and a method for transporting a rotary machine that can avoid an increase in the size of the device and can protect the bearing during transportation.

Means for Solving the Problems

[0006] A transport protection device according to one aspect of the present disclosure is a transport protection device for a rotating machine, comprising a rotating body, a bearing capable of supporting the rotating body in contact with it, and a magnetic actuator capable of supporting the rotating body without contact by generating a magnetic attractive force that causes the rotating body to move away from the bearing, all housed within a casing, and comprising a current supply unit that supplies current to the magnetic actuator during transport of the rotating machine to generate a magnetic attractive force from the rotating body toward the bearing, and a control unit that controls the current supply unit.

[0007] The transport protection device of this embodiment can hold a rotating body by generating a magnetic attractive force from the rotating body toward the bearing during transport of the rotating machine. This suppresses the relative movement of the rotating body relative to the bearing during transport. As a result, collisions between the rotating body and the bearing can be suppressed during transport, preventing damage to both the rotating body and the bearing. The transport protection device does not require permanent magnets to suppress the relative movement of the rotating body relative to the bearing, thus avoiding an increase in the size of the device.

[0008] In a transport protection device according to one aspect of this disclosure, the control unit controls the current supply unit so that the magnetic attractive force exceeds a reference value. In this transport protection device configuration, by controlling the current supply unit, a magnetic attractive force exceeding the reference value can be applied to suppress the movement of the rotating body and protect the bearings.

[0009] A transport protection device according to one aspect of this disclosure includes a gap sensor for detecting the length of the gap between a rotating body and a bearing, and the control unit may control the current supply unit based on the detection result of the gap sensor. With this configuration of the transport protection device, the magnetic attraction force can be changed based on the detection result of the gap sensor to control the gap between the rotating body and the bearing. The transport protection device may control the magnetic attraction force so that the gap between the rotating body and the bearing becomes zero.

[0010] A transport protection device according to one aspect of this disclosure includes an acceleration sensor attached to the casing for detecting the acceleration of the casing, and the control unit may control the current supply unit based on the detection result of the acceleration sensor. With this configuration of the transport protection device, the magnetic attraction force can be controlled according to the acceleration acting on the casing. This transport protection device can press the rotating body downward.

[0011] In a transport protection device according to one aspect of this disclosure, the magnetic attractive force may include a downward component in the vertical direction. This makes it possible to apply a magnetic attractive force with a downward component in the vertical direction from the rotating body toward the bearings during the transport of rotating machinery.

[0012] In a transport protection device according to one aspect of this disclosure, the magnetic attractive force may include a horizontal component. This makes it possible to apply a magnetic attractive force that includes a horizontal component directed from the rotating body toward the bearings during the transport of the rotating machinery.

[0013] A transport protection device according to one aspect of the present disclosure is a transport protection device for a rotating machine, comprising a rotating body, a bearing capable of supporting the rotating body by contacting it, and a magnetic actuator capable of supporting the rotating body without contact by generating a magnetic attractive force that causes the rotating body to move away from the bearing, all housed in a casing, wherein the magnetic actuator has a first coil and a second coil, and during transport of the rotating machine, a current supply unit that supplies current to the first coil to generate a first magnetic attractive force in a first direction which is one direction in the horizontal direction, and a second magnetic attractive force that supplies current to the second coil to generate a second magnetic attractive force in a second direction which is the opposite direction to the first direction in the horizontal direction, a gap sensor that detects the length of the gap between the rotating body and the bearing in the horizontal direction, and a control unit that controls the current supply unit based on the detection result of the gap sensor so that the rotating body and the bearing do not come into contact in the horizontal direction.

[0014] The transport protection device of this embodiment can generate a magnetic attractive force in a first direction by supplying current to a first coil during the transport of a rotating machine, thereby displacing the rotating body in the first direction. The transport protection device can generate a magnetic attractive force in a second direction by supplying current to a second coil during the transport of a rotating machine, thereby displacing the rotating body in the second direction. Based on the detection result from a gap sensor, the transport protection device can generate a magnetic attractive force in the first or second direction in the horizontal direction to prevent contact between the rotating body and the bearing. The transport protection device does not require permanent magnets to suppress the relative movement of the rotating body with respect to the bearing, thus avoiding an increase in the size of the device.

[0015] In a transport protection device according to one aspect of this disclosure, the magnetic actuator comprises two or more coils, and the current supply unit generates a magnetic attractive force during transport by supplying current to a number of coils less than the number of coils. The transport protection device comprises a coil for generating a magnetic attractive force during normal operation of the rotating machine, separate from the coils that generate the magnetic attractive force during transport. The two or more coils may include the first and second coils described above. The transport protection device may also generate a magnetic attractive force during transport using the coils of the magnetic bearings of the rotating machine.

[0016] A transport protection device according to one aspect of this disclosure may be configured separately from the rotating machine. The current supply unit and control unit of the transport protection device may also be separate from the rotating machine. This allows the transport protection device to be installed when transporting the rotating machine, removed after transporting the rotating machine, and reused when transporting another rotating machine.

[0017] A rotating machine unit according to one aspect of the present disclosure comprises the above-mentioned transport protection device, a rotating body, a bearing capable of supporting the rotating body in contact with it, a magnetic actuator capable of supporting the rotating body without contact by generating a magnetic attractive force that causes the rotating body to move away from the bearing, and a rotating machine having a casing that houses the rotating body, the bearing, and the magnetic actuator. The rotating machine unit comprises the rotating machine and the above-mentioned transport protection device. The rotating machine has a rotating body, a bearing, a magnetic actuator, and a casing. According to the rotating machine unit of this aspect, the current supply unit and control unit of the transport protection device can be utilized during normal operation after transport.

[0018] A compressor unit according to one aspect of the present disclosure comprises the above-mentioned transport protection device, a rotating machine, and a compression mechanism driven by the rotating body. The compressor unit may include the transport protection device. The rotating machine may include a compression mechanism. According to the compressor unit of this aspect, the current supply unit and control unit of the transport protection device can be utilized during normal operation after transport.

[0019] A refrigeration system according to one aspect of this disclosure comprises the above-mentioned transport protection device, a rotating machine, and a refrigerant circuit having a compression mechanism, an evaporator, and a condenser driven by a rotating body. The refrigeration system may also include the transport protection device.

[0020] A method for transporting a rotating machine according to one aspect of the present disclosure is a method for transporting a rotating machine which comprises a rotating body, a bearing capable of supporting the rotating body by contacting the rotating body, and a magnetic actuator capable of supporting the rotating body without contact by generating a magnetic attractive force that causes the rotating body to move away from the bearing, and which is housed in a casing, and the method includes a first step of loading the rotating machine onto a transport machine, a second step of transporting the rotating machine by the transport machine while supplying current to the magnetic actuator, and a third step of unloading the rotating machine from the transport machine.

[0021] In the method for transporting a rotating machine according to this aspect, when transporting the rotating machine, by passing an electric current through the magnetic actuator, a magnetic attractive force from the rotating body toward the bearing can be generated to hold the rotating body. Thereby, relative movement of the rotating body with respect to the bearing during transportation can be suppressed. As a result, damage to the rotating body and the bearing during transportation can be prevented. In the transportation method of this aspect, there is no need to provide a permanent magnet to suppress relative movement of the rotating body with respect to the bearing, and an increase in the size of the device can be avoided.

[0022] In the method for transporting a rotating machine according to this aspect, in the second step, the magnetic actuator may be cooled. By cooling the magnetic actuator during transportation of the rotating machine, heat generation of the magnetic actuator can be suppressed. According to the transportation method of this aspect, damage due to heat of the magnetic actuator can be suppressed.

[0023] In the method for transporting a rotating machine according to this aspect, in the first step, while supplying an electric current to the magnetic actuator, the rotating machine may be loaded onto a transport machine, and in the third step, while supplying an electric current to the magnetic actuator, the rotating machine may be unloaded from the transport machine. When loading the rotating machine onto the transport machine, there is a possibility that the rotating body may move relatively, but by passing an electric current through the magnetic actuator, the rotating body can be held. When unloading the rotating machine from the transport machine, there is a possibility that the rotating body may move relatively, but by passing an electric current through the magnetic actuator, the rotating body can be held. Thereby, damage to the rotating body and the bearing can be prevented when loading the rotating machine onto the transport machine and when unloading the rotating machine from the transport machine.

Brief Description of the Drawings

[0024] [Figure 1] It is a cross-sectional view showing a rotating machine and a transport protection device according to the first embodiment. [Figure 2] It is a block diagram showing the hardware configuration of the transport protection device according to the first embodiment. [Figure 3]It is a cross-sectional view showing a rotating machine and a transport protection device according to the third embodiment. [Figure 4] It is a block diagram showing the hardware configuration of a transport protection device according to the third embodiment. [Figure 5] It is a cross-sectional view showing a rotating machine and a transport protection device according to the fourth embodiment. [Figure 6] It is a cross-sectional view showing a rotating machine and a transport protection device according to the fifth embodiment. [Figure 7] It is a block diagram showing the hardware configuration of a transport protection device according to the fifth embodiment. [Figure 8] It is a cross-sectional view showing a rotating machine and a transport protection device according to the sixth embodiment. [Figure 9] It is a cross-sectional view showing a rotating machine and a transport protection device according to the seventh embodiment. [Figure 10] It is a cross-sectional view showing a rotating machine and a transport protection device according to the eighth embodiment. [Figure 11] It is a process diagram showing the procedure of a transport method of a rotating machine according to the ninth embodiment. [Figure 12] It is a side view showing a rotating machine, a transport protection device, and a transport machine according to the tenth embodiment. [Figure 13] It is a side view showing a refrigeration device and a transport machine according to the eleventh embodiment. [Figure 14] It is a side view showing a rotating machine, a transport protection device, and a transport machine according to the twelfth embodiment. [Figure 15] It is a schematic diagram showing a refrigeration device according to the thirteenth embodiment. [Figure 16] It is a diagram showing the force acting on a rotating body placed on a transport body.

Embodiments for Carrying Out the Invention

[0025] Non-limiting embodiments of this disclosure will be described with reference to the attached drawings. In the attached drawings, identical or corresponding members or parts are denoted by the same or corresponding reference numerals. Furthermore, redundant descriptions of identical or corresponding members or parts will be omitted below. Also, the members or parts in the drawings are not necessarily drawn to scale. Therefore, those skilled in the art can arbitrarily determine specific dimensions by referring to the non-limiting embodiments below. Furthermore, the embodiments below are illustrative and not limiting to the invention. Also, the features and combinations thereof described in the embodiments are not necessarily essential to the invention.

[0026] [Rotating Machinery 100] Before describing the transport protection device 110, the rotating machine 100 will be described. Figure 1 is a cross-sectional view showing the rotating machine 100 and the transport protection device 110 according to the first embodiment. The rotating machine 100 may be, for example, a turbo compressor. The turbo compressor may be, for example, a single-stage compressor, a two-stage compressor, or a multi-stage compressor with three or more stages. The turbo compressor includes an impeller connected to the rotating shaft 20. The turbo compressor compresses, for example, a refrigerant.

[0027] The rotating machine 100 comprises a rotating shaft 20, a bearing device 30, a motor 40, and a casing 50. The rotating shaft 20 is an example of a rotating body. The rotating shaft 20 has longitudinally opposing ends 20a and 20b. The longitudinal direction of the rotating shaft 20 is the direction in which the centerline C1 of the rotating shaft 20 extends. The impeller is provided, for example, at the end 20a of the rotating shaft 20.

[0028] [Motor 40] The motor 40 is the drive source for the rotating machine. The motor 40 has a rotor 41 and a stator 42. The rotor 41 is fixed to the rotating shaft 20 and rotates with the rotating shaft 20. The stator 42 is fixed to the casing 50 and is positioned around the rotor 41. The motor 40 rotates the rotating shaft 20 to drive the impeller.

[0029] [Casing 50] The casing 50 houses the rotating shaft 20, the bearing device 30, and the motor 40. The casing 50 has a compression chamber for housing the impeller and a motor chamber for housing the rotating shaft 20, the bearing device 30, and the motor 40.

[0030] [Bearing device 30] The bearing device 30 includes bearings 31 to 34 that rotatably support the rotating shaft 20. The bearings 31 to 34 are fixed to the casing 50. Bearings 31 and 32 are radial magnetic bearings, and bearings 33 and 34 are thrust magnetic bearings. The bearing device 30 is an example of a magnetic bearing device. The bearing device 30 may be "vertical" or "horizontal". "Vertical" means that the center line C1 of the rotating body is arranged along the vertical direction. "Horizontal" means that the center line C1 of the rotating body is arranged along the horizontal direction.

[0031] Bearings 31-34 are magnetic bearings that support the rotating shaft using magnetic attraction or magnetic repulsion. Bearings 31-34 may also be active magnetic bearings (AMB). Bearings 31 and 32, which are radial magnetic bearings, include electromagnets arranged around the rotating shaft 20. The electromagnets have an iron core and coils. Bearings 33 and 34, which are thrust magnetic bearings, include an axial disk 21 that protrudes radially outward from the rotating shaft 20, and electromagnets arranged to face the axial disk 21 in the axial direction. The axial disk 21 is provided at the end 20b of the rotating shaft 20.

[0032] Bearings 31-34 are, for example, oil-less bearings. The bearing device 30 may include sliding bearings or rolling bearings. The bearing device 30 may also include hydrostatic bearings. Oil-less bearings are bearings that do not require the supply of lubricating oil. Examples of oil-less bearings include gas bearings, air bearings, foil bearings, and magnetic bearings.

[0033] Bearings 31-34 may be air bearings. Air bearings are a type of hydrostatic bearing, in which compressed air is blown between the rotating shaft 20 and the bearing surface, allowing the rotating shaft 20 to float and support the load using air pressure. Bearings 31 and 32 may also be gas bearings, in which compressed gas is blown between the rotating shaft 20 and the bearing surface to float the rotating shaft 20. Gas bearings may also use refrigerant gas as the compressed gas to float the rotating shaft 20.

[0034] The bearings 31-34 may be foil bearings, which are a type of pneumatic bearing. A foil bearing has a thin film (foil) as the bearing surface. The thin film has low rigidity against bending and is flexible. The foil bearing supports the load by allowing the deflection of the foil. When the rotating shaft 20 rotates, a fluid film (air film) is formed between the rotating shaft 20 and the bearing surface, which is the foil. The foil bearing supports the rotating shaft 20 using the foil and the fluid film. Due to the flexibility of the foil, the foil bearing can form a bearing clearance that corresponds to the rotational speed of the rotating shaft 20, the load on the rotating shaft 20, the ambient temperature around the rotating shaft 20, and other operating conditions.

[0035] The types, positions, and quantities of bearings 31-34 are not limited to those described above.

[0036] [Protective bearings 35, 36] The bearing device 30 may include protective bearings 35 and 36. The protective bearings 35 and 36 may be, for example, ball bearings. The protective bearing 35 is positioned between the bearing 31 and the end portion 20a in the longitudinal direction of the rotating shaft 20. The protective bearing 36 is positioned between the bearing 32 and the bearing 33 in the longitudinal direction of the rotating shaft 20.

[0037] The protective bearings 35 and 36 may also be touchdown bearings. Touchdown bearings are also called auxiliary bearings or backup bearings. Touchdown bearings limit the range of motion of the rotating shaft 20. Touchdown bearings can limit the range of motion of the rotating shaft 20 in the radial direction. Touchdown bearings can limit the range of motion of the rotating shaft 20 in the axial direction. Touchdown bearings can prevent contact between the stator and rotor. Touchdown bearings can support the rotating shaft 20 when the magnetic bearings are not energized.

[0038] The bearing device 30 is equipped with a magnetic actuator that can support the rotating shaft 20 without contact by generating a magnetic attractive force that causes the rotating shaft 20 to move away from the bearings 31-34. The bearings 31-34 each have an electromagnet as a magnetic actuator.

[0039] [Transportation protection device 110 according to the first embodiment] Next, a transport protection device 110 according to the first embodiment will be described. The transport protection device 110 is a transport protection device 110 that protects the bearing device 30 and the rotating shaft 20 when the rotating machine 100 is transported. The transport protection device 110 includes a controller 200. The controller 200 has a current supply unit 201 and a control unit 210.

[0040] [Current supply section 201] The current supply unit 201 generates magnetic attractive forces F11 and F12 from the rotating shaft 20 toward the bearings 31 and 32 by supplying current to the magnetic actuators 31a and 32a when the rotating machine 100 is being transported. The center line C1 of the rotating shaft 20 is, for example, aligned horizontally. The Z1 direction shown in Figure 1 is the downward direction in the vertical direction. The magnetic attractive forces F11 and F12 include a vertically downward component.

[0041] The controller 200 is configured separately from the rotating machine 100.

[0042] [Control Unit 210] The control unit 210 controls the operation of the current supply unit 201. The control unit 210 controls the operation of the current supply unit 201 so that the magnitude of the magnetic attractive forces F11 and F12 exceeds a reference value. The control unit 210 may calculate the reference value by multiplying the gravitational force acting on the rotation axis 20 (gravity due to its own weight) by a predetermined multiplier. The control unit 210 may change the reference value by changing the predetermined multiplier. The control unit 210 can apply a force to the rotation axis 20 that exceeds the predetermined value. The "predetermined value" will be described later.

[0043] Figure 2 is a block diagram showing the hardware configuration of the transport protection device 110 according to the first embodiment. As shown in Figure 2, the control unit 210 includes a CPU 211 and a storage unit 212. The CPU (Center Processing Unit) 211 is responsible for the overall processing in the transport protection device 110. The CPU 211 can control the current supplied to the magnetic actuators 31a and 31b. The magnetic actuators 31a and 31b are electromagnets of bearings 31 and 32. The magnetic actuators 31a and 31b may be electromagnets other than those in the magnetic bearings.

[0044] The memory unit 212 includes a ROM (Read Only Memory) 213 and a RAM (Random Access Memory) 214. The ROM 213 stores various programs for the CPU 211 to execute control processing, as well as various data necessary for the operation of the transport protection device 110. The RAM 214 may temporarily store data acquired from various sensors.

[0045] The memory unit 212 stores information about the bearing device 30. For example, the memory unit 212 stores information about the weight of the rotating body, the supplied current during rotation, and the electromagnetic force characteristics of the bearing device 30. The information about the weight of the rotating body includes the weight of the rotating shaft 20 and the weight of the impeller attached to the rotating shaft 20. The information about the supplied current during rotation includes information about the current values ​​supplied to the bearings 31-34 during normal operation of the rotating machine 100.

[0046] The control unit 210 can adjust the current supplied to the magnetic actuators 31a and 31b according to information about the bearing device 30. The control unit 210 can receive input about the bearing device 30. The control unit 210 is connected to an input unit that can be operated by the user. The user can input information about the bearing device 30 by operating the input unit. The user can adjust the current supplied to multiple types of magnetic actuators 31a and 32a by operating the input unit. The user may also transmit data to the control unit 210, for example, using a communication terminal.

[0047] [Power supply 111] The transport protection device 110 may be equipped with a power supply 111. The power supply 111 supplies current to the magnetic actuator of the bearing device 30. The power supply 111 can supply power to the controller 200 of the transport protection device 110. The power supply 111 may be a dedicated battery for the transport protection device 110. The power supply 111 may be a power supply built into the transporter that transports the rotating machine 100, or a power supply mounted on the transporter. The transporter that transports the rotating machine 100 may be, for example, a vehicle (automobile, train), a ship, an airplane, or a rocket. Alternatively, the rotating machine 100 may be transported using a conveying machine such as a crane. "Transportation" may also mean moving the rotating machine 100. Transportation of the rotating machine includes moving the rotating machine to its installation location, but does not include the normal operation of the rotating machine. For example, if the rotating machine is on a ship and is operating normally, this is not included in the transportation described herein.

[0048] If the power supply 111 is a dedicated battery for the transport protection device 110, it is possible to supply current to the magnetic actuator during transport, regardless of the transport vehicle.

[0049] [Effects of the transport protection device 110 according to the first embodiment] The transport protection device 110 according to this embodiment is a transport protection device 110 for a rotating machine 100, which is housed in a casing 50 and comprises a rotating shaft (rotating body) 20, protective bearings 35, 36 that can contact and support the rotating shaft 20, and magnetic actuators 31a, 32a that can support the rotating shaft 20 without contact by generating a magnetic attractive force that causes the rotating shaft 20 to move away from the bearings 31, 32. The transport protection device 110 comprises a current supply unit 201 that supplies current to the magnetic actuators 31a, 31b when the rotating machine 100 is being transported, thereby generating magnetic attractive forces F11, F12 directed from the rotating shaft 20 toward the bearings 31, 32, and a control unit 210 that controls the current supply unit 201. "Moving away from the bearings" means that the bearing surface and the rotating body are not in contact.

[0050] The transport protection device 110 in this embodiment can hold the rotating shaft 20 by generating magnetic attractive forces F11 and F12 from the rotating shaft 20 toward the bearings 31 and 32 during transport of the rotating machine 100. This suppresses the relative movement of the rotating shaft 20 with respect to the bearings 31-34 and protective bearings 35 and 36 during transport. As a result, damage to the rotating shaft 20, bearings 31-34, and protective bearings 35 and 36 during transport can be prevented. The transport protection device 110 can prevent damage to the bearing device 30 due to external impacts to the rotating machine 100 during transport. The transport protection device 110 does not require permanent magnets to suppress the relative movement of the rotating shaft 20 with respect to the bearings 31-34 and protective bearings 35 and 36, thus avoiding an increase in the size of the device.

[0051] In the transport protection device 110, the control unit 210 controls the current supply unit 201 so that the magnetic attractive forces F11 and F12 exceed a reference value. In the transport protection device 110 with this configuration, by controlling the current supply unit 201, it is possible to apply magnetic attractive forces F11 and F12 that are greater than the reference value.

[0052] In the transport protection device 110, the magnetic attractive forces F11 and F12 may include a downward component in the vertical direction. This allows a magnetic attractive force with a downward component in the vertical direction to be applied from the rotating shaft 20 toward the bearings 31 and 32 during the transport of the rotating machine 100.

[0053] The transport protection device 110 may be configured separately from the rotating machine 100. The controller (current supply unit 201 and control unit 210) 200 of the transport protection device 110 may also be configured separately from the rotating machine 100. This allows the transport protection device 110 to be installed when transporting the rotating machine 100, and after transport, the transport protection device 110 to be removed and reused when transporting another rotating machine 100.

[0054] [Transportation protection device 110 according to the second embodiment] Next, the transport protection device 110 according to the second embodiment will be described. The difference between the transport protection device 110 according to the second embodiment and the transport protection device 110 according to the first embodiment is that the transport protection device 110 is built into the rotating machine 100. In the description of the transport protection device 110 according to the second embodiment, the same explanation as that given for the transport protection device 110 according to the first embodiment will be omitted.

[0055] The transport protection device 110 may be built into the bearing device 30. The transport protection device 110 can control the operation of bearings 31-34 during normal operation of the rotating machine 100. The transport protection device 110 may be provided, for example, in the casing 50. The transport protection device 110 may be attached to the rotating machine 100.

[0056] The transport protection device 110 according to this second embodiment also provides the same effects and advantages as the transport protection device 110 according to the first embodiment. In the transport protection device 110 according to the second embodiment, since the transport protection device 110 is built-in, it is not necessary to install the transport protection device 110 during transport.

[0057] [Transportation protection device 110C according to the third embodiment] Next, the transport protection device 110C according to the third embodiment will be described. Figure 3 is a cross-sectional view showing the rotating machine 100 and the transport protection device 110C according to the third embodiment. Figure 4 is a block diagram showing the hardware configuration of the transport protection device 110C according to the third embodiment. The difference between the transport protection device 110C according to the third embodiment and the transport protection device 110 according to the first embodiment described above is that, during transport, it generates magnetic attractive forces F21 and F22 that include a horizontal component, and controls the direction and magnitude of the magnetic attractive forces F21 and F22 based on the detection results by the gap sensor 71. In the description of the transport protection device 110C according to the third embodiment, the same explanation as that for the transport protection device 110 according to the above embodiment will be omitted.

[0058] [Magnetic actuators 33a, 34a] The bearings 33 and 34 of the bearing device 30 include magnetic actuators 33a and 34a. The bearings 33 and 34 are thrust magnetic bearings, as described above. The magnetic actuators 33a and 34a include electromagnets arranged around the rotating shaft 20. The electromagnets have an iron core and a coil. The magnetic actuators 33a and 34a can generate magnetic attractive forces F21 and F22, which include a horizontal component.

[0059] Magnetic attractive force F21 is an example of a first magnetic attractive force, and magnetic attractive force F22 is an example of a second magnetic attractive force. Magnetic attractive force F21 is a magnetic attractive force in the X1 direction. Magnetic attractive force F22 is a magnetic attractive force in the X2 direction. The X1 direction is an example of a first direction, which is one direction in the horizontal direction, and the X2 direction is an example of a second direction, which is the opposite direction to the first direction. The X1 direction may be, for example, the direction from end 20b to end 20a. The X2 direction may be, for example, the direction from end 20a to end 20b. The X1 and X2 directions may also be directions along the axial direction of the rotation axis 20.

[0060] The transport protection device 110C may include magnetic actuators 33a and 34a. Magnetic actuator 33a may have a first coil. Magnetic actuator 34a may have a second coil. The magnetic actuators 33a and 34a of the transport protection device 110C may also serve as magnetic actuators for the bearing device 30. The transport protection device 110C may include magnetic actuators 33a and 34a that are different from the magnetic actuators of the bearing device 30.

[0061] [Gap Sensor 71] The transport protection device 110C may include a plurality of gap sensors 71. The gap sensors 71 may detect the position of the rotation axis 20 in the axial direction. The gap sensors 71 may detect the position of the axial disk 21 in the axial direction.

[0062] The gap sensor 71 may detect the length of the gap between the axial disk 21 and the bearings 33 and 34, which are provided on the rotating shaft 20. The control unit 210 may calculate the length of the gap between the axial disk 21 and the bearings 33 and 34 from the detection result by the gap sensor 71.

[0063] The transport protection device 110C may control the direction and magnitude of the magnetic attractive forces F21 and F22 so that the stepped surface 22 of the rotating shaft 20 and the side surface of the protective bearing 36 do not come into contact in the horizontal direction (axial direction). A small diameter portion is formed on the rotating shaft 20, and a stepped surface 22 perpendicular to the axial direction is formed near the small diameter portion. The side surface of the protective bearing 36 is a surface perpendicular to the axial direction. The stepped surface 22 faces the side surface of the protective bearing 36 in the axial direction.

[0064] [Current supply section 201] The current supply unit 201 supplies current to the coil of the magnetic actuator 33a, generating a magnetic attractive force F21. The current supply unit 201 also supplies current to the coil of the magnetic actuator 34a, generating a magnetic attractive force F22.

[0065] [Control Unit 210] Based on the detection result of the gap sensor 71, the control unit 210 controls the current supply unit 201 so that the stepped surface 22 of the rotating shaft 20 and the side surface of the protective bearing 36 do not come into contact in the horizontal direction. The control unit 210 can change the direction and magnitude of the magnetic attractive forces F21 and F22 by controlling the current supply unit 201.

[0066] [Effects and Effects of the Transport Protection Device 110C According to the Third Embodiment] The transport protection device 110C according to this embodiment is a transport protection device 110C for a rotating machine 100, which houses a rotating shaft (rotating body) 20, protective bearings 35 and 36 that can contact and support the rotating shaft 20, and magnetic actuators 31a and 32a that can support the rotating shaft 20 without contact by generating a magnetic attractive force that causes the rotating shaft 20 to move away from the bearings 31 and 32, wherein the magnetic actuator 33a has a first coil and the magnetic actuator 34a has a second coil, and when the rotating machine 100 is transported, current is supplied to the first coil. The system includes a current supply unit 201 that generates a first magnetic attractive force F21 in the X1 direction (first direction), which is one direction in the horizontal direction, and a second magnetic attractive force F22 in the X2 direction (second direction) in the horizontal direction by supplying current to a second coil; a gap sensor 71 that detects the length of the gap between the stepped surface 22 of the rotating shaft 20 and the protective bearing 36 in the horizontal direction; and a control unit 210 that controls the current supply unit 201 based on the detection result of the gap sensor 71 so that the stepped surface 22 of the rotating shaft 20 and the protective bearing 36 do not come into contact in the horizontal direction.

[0067] The transport protection device 110C according to this embodiment can generate a magnetic attractive force F21 in the X1 direction by supplying current to the first coil of the magnetic actuator 33a when the rotating machine 100 is being transported, thereby displacing the rotating shaft 20 in the X1 direction. The transport protection device 110C can generate a magnetic attractive force F22 in the X2 direction by supplying current to the second coil of the magnetic actuator 34a when the rotating machine 100 is being transported, thereby displacing the rotating shaft 20 in the X2 direction. Based on the detection result by the gap sensor 71, the transport protection device 110C can generate magnetic attractive forces F21 and F22 in the X1 or X2 direction to prevent contact between the rotating shaft 20 (stepped surface 22) and the protective bearing 35. The transport protection device 110C can prevent damage to the bearing device 30 due to horizontal impacts from outside the rotating machine 100 during transport of the rotating machine 100. In the transport protection device 110C, there is no need to provide permanent magnets to suppress the relative movement of the rotating shaft 20 with respect to the protective bearing 36, thus avoiding an increase in the size of the device.

[0068] The gap sensor 71 may detect the length of the gap between the rotating shaft 20 and the bearings 33, 34 by detecting the horizontal position of the rotating shaft 20. The gap sensor 71 may detect the length of the gap between the rotating shaft 20 and the bearings 33, 34 by detecting the horizontal position of the axial disk 21. The gap sensor 71 may detect the length of the gap between the rotating shaft 20 and the bearings 33, 34 by detecting the length of the gap between the axial disk 21 and the bearings 33, 34 in the axial direction. The gap sensor 71 may detect other positions of the rotating shaft 20.

[0069] [Transportation protection device 110D according to the fourth embodiment] Next, the transport protection device 110D according to the fourth embodiment will be described. Figure 5 is a cross-sectional view showing the rotating machine 100 and the transport protection device 110D according to the fourth embodiment. The difference between the transport protection device 110D according to the fourth embodiment and the transport protection device 110 according to the first embodiment is that, during transport, it controls the magnitude of the magnetic attraction forces F11 and F12 based on the detection results by the gap sensors 73 to 76. In the description of the transport protection device 110D according to the fourth embodiment, the same explanation as that for the transport protection device 110 according to the above embodiment will be omitted.

[0070] [Gap sensors 73-76] The transport protection device 110D may include a plurality of gap sensors 73-76. The gap sensors 73-76 can detect the position of the rotation axis 20 in the vertical direction. The gap sensors 73-76 can detect the length of the gap between the outer surface of the rotation axis 20 and the gap sensors 73-76 in a direction perpendicular to the axial direction.

[0071] The gap sensor 73 is positioned below the rotation axis 20. The gap sensors 73 and 74 are positioned in the axial direction between the bearing 32 and the protective bearing 36. The gap sensor 74 is positioned above the rotation axis 20. The gap sensor 74 is positioned opposite the gap sensor 73 in the radial direction of the rotation axis 20.

[0072] The gap sensor 75 is positioned below the rotating shaft 20. The gap sensors 75 and 76 are positioned axially between the bearing 31 and the protective bearing 35. The gap sensor 76 is positioned above the rotating shaft 20. The gap sensor 76 is positioned radially to the rotating shaft 20, opposite the gap sensor 75. [Control Unit 210] The control unit 210 may calculate the size of the gap between the rotating shaft 20 and the bearing surfaces of the protective bearings 35 and 36 based on the detection results of the gap sensors 73 to 76. Based on the detection results of the gap sensors 73 to 76, the control unit 210 controls the current supply unit 201 so that the distance between the lower surface of the outer circumferential surface of the rotating shaft 20 and the lower bearing surfaces of the protective bearings 35 and 36 in the vertical direction becomes 0. The control unit 210 can control the magnitude of the magnetic attractive forces F11 and F12 by controlling the current supply unit 201.

[0073] The transport protection device 110D according to this fourth embodiment also provides the same effects as the transport protection device 110 according to the first embodiment. The transport protection device 110D according to the fourth embodiment is equipped with gap sensors 73 to 76 and can generate magnetic attractive forces F11 and F12 so that the distance between the lower outer circumferential surface of the rotating shaft 20 and the lower bearing surfaces of the protective bearings 35 and 36 becomes 0. As a result, the transport protection device 110D can prevent damage to the bearing device 30 due to external impacts to the rotating machine 100 during transport. During transport, the transport protection device 110D can control the current supplied to the magnetic actuators 31a and 32a so that the distance between the lower outer circumferential surface of the rotating shaft 20 and the lower bearing surfaces of the protective bearings 35 and 36 becomes 0, according to the detection results of the gap sensors 73 to 76. Therefore, the transport protection device 110D can reduce power consumption during transport compared to the case where current is supplied continuously. The transport protection device 110D allows for miniaturization of the power supply 111.

[0074] [Transportation protection device 110E according to the fifth embodiment] Next, the transport protection device 110E according to the fifth embodiment will be described. Figure 6 is a cross-sectional view showing the rotating machine 100 and the transport protection device 110E according to the fifth embodiment. Figure 7 is a block diagram showing the hardware configuration of the transport protection device 110E according to the fifth embodiment. The difference between the transport protection device 110E according to the fifth embodiment and the transport protection device 110 according to the first embodiment described above is that, during transport, the magnitude of the magnetic attractive forces F11 and F12 is controlled based on the detection results from the acceleration sensor 77. Note that in the description of the transport protection device 110E according to the fifth embodiment, the same explanation as in the transport protection device 110 according to the above embodiment will be omitted.

[0075] [Accelerometer 77] The transport protection device 110E includes an acceleration sensor 77. The acceleration sensor 77 is mounted, for example, on the casing 50. The acceleration sensor 77 may also be built into the casing 50. The acceleration sensor 77 can detect acceleration acting on the casing 50.

[0076] [Control Unit 210] The control unit 210 can control the current supplied to the magnetic actuators 31a and 32a by controlling the current supply unit 201 based on the detection results of the acceleration sensor 77. The control unit 210 can also control the magnitude of the magnetic attractive forces F11 and F12 according to the acceleration acting on the casing 50.

[0077] The transport protection device 110E according to this fifth embodiment also provides the same effects as the transport protection device 110 according to the first embodiment. The transport protection device 110E according to the fifth embodiment is equipped with an acceleration sensor 77 and can control the current supplied to the magnetic actuators 31a and 32a.

[0078] In the transport protection device 110E, for example, if the acceleration detected by the acceleration sensor 77 is less than a predetermined value, the current supplied to the magnetic actuators 31a and 32a may be reduced. In the transport protection device 110E, for example, if the acceleration detected by the acceleration sensor 77 exceeds a predetermined value, the current supplied to the magnetic actuators 31a and 32a may be increased.

[0079] The transport protection device 110E can reduce power consumption during transport compared to a case where current is supplied continuously. The transport protection device 110E can also enable miniaturization of the power supply 111.

[0080] [Transportation protection device 110C related to a modified example] The modified transport protection device 110C may include an acceleration sensor 77. The transport protection device 110C may include an acceleration sensor 77 instead of a gap sensor 71. The control unit 210 may change the direction and magnitude of the magnetic attractive forces F21 and F22 based on the detection results from the acceleration sensor 77.

[0081] [Transportation protection device 110F according to the sixth embodiment] Next, the transport protection device 110F according to the sixth embodiment will be described. Figure 8 is a cross-sectional view showing the rotating machine 100 and the transport protection device 110F according to the sixth embodiment. The difference between the transport protection device 110F according to the sixth embodiment and the transport protection device 110 according to the first embodiment described above is that, during transport, it does not generate magnetic attractive forces F11 and F12, but generates a magnetic attractive force F22 in the horizontal direction. Note that in the description of the transport protection device 110E according to the sixth embodiment, the same explanation as in the transport protection device 110 according to the above embodiment will be omitted.

[0082] [Current supply section 201] The current supply unit 201 supplies current to the coil of the magnetic actuator 34a, generating a magnetic attractive force F22.

[0083] In this sixth embodiment of the transport protection device 110F, the rotating shaft 20 (axial disk 21) can be held in place by generating a magnetic attractive force F22 from the rotating shaft 20 (axial disk 21) toward the bearing 34 during transport of the rotating machine 100. This suppresses the relative movement of the rotating shaft 20 with respect to the bearings 31-34 and protective bearings 35, 36 during transport. As a result, damage to the rotating shaft 20, bearings 31-34, and protective bearings 35, 36 during transport can be prevented. The transport protection device 110F can prevent damage to the bearing device 30 due to external impacts to the rotating machine 100 during transport. The transport protection device 110F does not require permanent magnets to suppress the relative movement of the rotating shaft 20 with respect to the bearings 31-34 and protective bearings 35, 36, thus avoiding an increase in the size of the device.

[0084] In the transport protection device 110F, the magnetic actuators 33a and 34a are equipped with two or more coils, and the current supply unit 201 generates a magnetic attractive force F22 during transport by supplying current to a number of coils less than the number of coils. The bearing device 30 has two or more coils, namely the coil of bearing 31, the coil of bearing 32, the coil of bearing 33, and the coil of bearing 34. During transport, the current supply unit 201 can generate a magnetic attractive force F22 by supplying current to one of the four coils, the coil of bearing 34 (magnetic actuator 34a).

[0085] The transport protection device 110F includes, in addition to the coil (magnetic actuator 34a) that generates a magnetic attractive force F22 during transport, coils (magnetic actuators 31a, 32a, 33a) for generating a magnetic attractive force during normal operation of the rotating machine 100.

[0086] [Transportation protection device 110F related to a modified example] The modified transport protection device 110F may generate a magnetic attractive force F21 in the horizontal direction. The transport protection device 110F may also generate a magnetic attractive force F21 in the opposite direction to the magnetic attractive force F22.

[0087] [Transportation protection device 110G according to the seventh embodiment] Next, the transport protection device 110G according to the seventh embodiment will be described. Figure 9 is a cross-sectional view showing the rotating machine 100 and the transport protection device 110G according to the seventh embodiment. The difference between the transport protection device 110G according to the seventh embodiment and the transport protection device 110 according to the first embodiment is that, during transport, it generates magnetic attractive forces F11, F12 including a vertical component, and a magnetic attractive force F22 including a horizontal component. In the description of the transport protection device 110E according to the seventh embodiment, the same explanation as for the transport protection device 110 according to the above embodiment will be omitted.

[0088] The current supply unit 201 of the transport protection device 110G supplies current to the magnetic actuators 31a, 32a, and 34a so as to generate magnetic attractive forces F11, F12, and F22 in two different directions (Z1 direction and X2 direction). The X2 direction may also be the direction of travel of the rotating machine 100 during transport.

[0089] [Transportation protection device 110 according to the 8th embodiment] Next, the transport protection device 110G according to the eighth embodiment will be described. Figure 10 is a cross-sectional view showing the rotating machine 100 and the transport protection device 110G according to the eighth embodiment. The difference between the transport protection device 110G according to the eighth embodiment and the transport protection device 110C according to the third embodiment is that, during transport, it generates vertically upward magnetic attractive forces F13 and F14, and controls the magnitude and direction of the magnetic attractive forces F11, F12, F13, and F14 based on the detection results by gap sensors 73 to 76. In the description of the transport protection device 110G according to the eighth embodiment, the same explanation as for the transport protection device 110 according to the above embodiment will be omitted.

[0090] [Current supply section 201] The current supply unit 201 generates magnetic attractive forces F13 and F14 from the rotating shaft 20 toward the bearings 31 and 32 by supplying current to the magnetic actuators 31a and 32a when the rotating machine 100 is being transported. The Z2 direction shown in Figure 10 is the upward direction in the vertical direction. The magnetic attractive forces F13 and F14 include a vertically upward component.

[0091] [Transportation method for the rotating machine 100 according to the 9th embodiment] Next, a method for transporting the rotating machine 100 according to the ninth embodiment will be described. Figure 11 is a process diagram showing the procedure for transporting the rotating machine according to the ninth embodiment. The transport protection device 110 according to the above embodiment can be used in the method for transporting the rotating machine 100. For example, when transporting the rotating machine 100 from the factory where it was manufactured to the installation location, the method for transporting the rotating machine 100 according to the embodiment can be applied. In this embodiment, a method for transporting the rotating machine 100 using the transport protection device 110 according to the first embodiment will be described. The method for transporting the rotating machine 100 may also be carried out using the transport protection devices according to the second to eighth embodiments described above.

[0092] In the method for transporting the rotating machine 100, the process of loading the rotating machine 100 onto a transport machine is performed (step S11). The transport machine may be a vehicle such as a truck. The person performing the transport may, for example, use a transport machine such as a crane to lift the rotating machine 100 and place it on the truck bed.

[0093] Next, the transport method for the rotating machine 100 performs the step of supplying current to the magnetic actuators 31a and 32a (step S12). The current supply unit 201 of the transport protection device 110 supplies current to the magnetic actuators 31a and 32a. The control unit 210 controls the operation of the current supply unit 201.

[0094] Next, in the method for transporting the rotating machine 100, the process of transporting the rotating machine 100 is carried out (step S13). The operator drives a truck to transport the rotating machine 100 to the destination. During transport, the transport protection device 110 supplies current to the magnetic actuators 31a and 32a, generating magnetic attractive forces F11 and F12.

[0095] During the process of transporting the rotating machine 100, it is not necessary to continuously supply current to the magnetic actuators 31a and 32a. For example, the supply of current may be started while the truck is moving. For example, the supply of current may be started and stopped multiple times while the truck is moving.

[0096] Next, in the method for transporting the rotating machine 100, the process of unloading the rotating machine 100 from the transport machine is performed (step S14). After arriving at the destination, the operator unloads the rotating machine 100 from the loading platform. The rotating machine 100 is then installed in the designated location.

[0097] [Effects and Effects of the Transportation Method for the Rotating Machine 100 According to the 9th Embodiment] In this method of transporting the rotating machine 100, when transporting the rotating machine 100, an electric current is passed through the magnetic actuators 31a and 32a to generate magnetic attractive forces F11 and F12 directed from the rotating shaft 20 toward the lower bearing surfaces of the protective bearings 35 and 36, thereby holding the rotating shaft 20 in place. This suppresses the relative movement of the rotating shaft 20 with respect to the protective bearings 35 and 36 during transport. As a result, damage to the rotating shaft 20, bearings 31-34, and protective bearings 35 and 36 during transport can be prevented. In this transport method, there is no need to provide permanent magnets to suppress the relative movement of the rotating shaft 20 with respect to the bearings, thus avoiding an increase in the size of the device.

[0098] In the method for transporting the rotating machine 100 according to this embodiment, the magnetic actuators 31a and 32a may be cooled during the transport process of the rotating machine 100. By cooling the magnetic actuators 31a and 32a during the transport of the rotating machine 100, heat generation of the magnetic actuators 31a and 32a can be suppressed. According to the transport method according to this embodiment, thermal damage to the magnetic actuators 31a and 32a can be suppressed. For example, the casing 50 may be cooled by blowing air using a fan, thereby cooling the coils of the magnetic actuators 31a and 32a.

[0099] In the method for transporting the rotating machine 100 according to this embodiment, in the step of loading the rotating machine 100 onto the transport machine, the rotating machine 100 may be loaded onto the transport machine while supplying current to the magnetic actuators 31a and 32a. When loading the rotating machine 100 onto the transport machine, there is a risk that the rotating shaft 20 may move relative to it, but by supplying current to the magnetic actuators 31a and 32a, the rotating shaft 20 can be held in place. This prevents damage to the rotating shaft 20, bearings 31 to 34, and protective bearings 35 and 36 when loading the rotating machine 100 onto the transport machine. In addition, the magnetic actuators 31a and 32a may be cooled in the step of loading the rotating machine 100 onto the transport machine.

[0100] In the method for transporting the rotating machine 100 according to this embodiment, in the step of unloading the rotating machine 100 from the transport machine, the rotating machine 100 may be loaded onto the transport machine while supplying current to the magnetic actuators 31a and 32a. When unloading the rotating machine 100 from the transport machine, there is a risk that the rotating shaft 20 may move relative to it, but by supplying current to the magnetic actuators 31a and 32a, the rotating shaft 20 can be held in place. This prevents damage to the rotating shaft 20, bearings 31-34, and protective bearings 35 and 36 when unloading the rotating machine 100 from the transport machine. In addition, the magnetic actuators 31a and 32a may be cooled in the step of unloading the rotating machine 100 from the transport machine.

[0101] [Transportation protection device 110 according to the 10th embodiment] Next, a transport protection device 110 according to the tenth embodiment will be described. Figure 12 is a side view showing the rotating machine 100, the transport protection device 110, and the transport machine 120 according to the tenth embodiment. The transport protection device 110 according to the tenth embodiment may be the same as the transport protection device 110 according to the first embodiment. In the description of the transport protection device 110 of the tenth embodiment, the same description as that of the transport protection device 110 according to the above embodiment will be omitted.

[0102] As shown in Figure 12, the rotating machine 100 is transported loaded onto the loading platform 120a of the transport machine 120. The transport machine 120 may be, for example, a truck. The transport machine 120 may also be other vehicles (automobiles, trains), ships, airplanes, or rockets.

[0103] Power source 111 may also be the power source for the transport machine 120. The transport machine 120 may be equipped with an internal combustion engine, a generator, and a battery. Power source 111 may also be a battery that stores the electricity generated by the generator mounted on the transport machine 120.

[0104] The controller 200 may be a built-in controller of the rotating machine 100. The controller 200 is built into the rotating machine 100. The controller 200 may also serve as a controller for controlling the operation of the rotating machine 100. When the rotating machine 100 is in operation, the controller 200 may control the rotational speed of the impeller, which is a rotating body, and the operation of the bearing device 30, which is a magnetic bearing device.

[0105] [Transportation protection device 110 according to the 11th embodiment] Next, a transport protection device 110 according to the 11th embodiment will be described. Figure 13 is a side view showing a refrigeration device 300 and a transport machine 120 according to the 11th embodiment. The transport protection device 110 according to the 11th embodiment may be the same as the transport protection device 110 according to the first embodiment. In the description of the transport protection device 110 of the 11th embodiment, the same descriptions as those for the transport protection device 110 according to the above embodiments will be omitted.

[0106] The refrigeration system 300 may include a transport protection device 110. The refrigeration system 300 comprises a rotating machine 100, a condenser 320, and an evaporator 340. The rotating machine 100 may be a turbo compressor for compressing the refrigerant. The condenser 320 condenses the refrigerant gas compressed by the rotating machine 100. An expansion valve expands the refrigerant condensed by the condenser 320. The evaporator 340 evaporates the refrigerant expanded by the expansion valve 330. The refrigerant gas evaporated in the evaporator 340 is drawn into the rotating machine 100.

[0107] The evaporator 340 may be located above the condenser 320. The rotating machine 100 may be located above the evaporator 340.

[0108] The refrigeration unit 300 is transported loaded on the loading platform 120a of the transport machine 120. The transport protection device 110 may be externally mounted to the rotating machine 100. The transport protection device 110 is built into the rotating machine 100. The power supply 111 may be placed on the loading platform 120a.

[0109] During the transport of the refrigeration unit 300, the power supply 111 can supply current to the magnetic actuators 31a and 32a of the bearing device 30 to generate magnetic attractive forces F11 and F12.

[0110] [Transportation protection device 110 according to the 12th embodiment] Next, a transport protection device 110 according to the 12th embodiment will be described. Figure 14 is a side view showing the rotating machine 100, the transport protection device 110, and the transport machine 120 according to the 12th embodiment. The transport protection device 110 according to the 12th embodiment may be the same as the transport protection device 110 according to the first embodiment. In the description of the transport protection device 110 of the 12th embodiment, the same description as the transport protection device 110 according to the above embodiment will be omitted.

[0111] The controller 200 may be an external controller. The external controller is a separate controller from the rotating machine 100 and is not built into the rotating machine 100. The controller 200 is mounted on the loading platform 120a of the transport machine 120.

[0112] The controller 200 includes a terminal block 200a on which multiple terminals are arranged. Wirings 200b and 200c are connected to the terminal block 200a. Connectors are connected to the wirings 200b and 200c, and the connectors are plugged into the terminal block 200a. Wiring 200b is connected to the coils of the magnetic actuators 31a and 32a of the bearing device 30. Wiring 200c is connected to the power supply 111. The current output from the power supply 111 is supplied to the coils of the magnetic actuators 31a and 32a via the controller 200. The transport protection device 110 generates magnetic attractive forces F11 and F12 during transport by supplying current to the magnetic actuators 31a and 32a.

[0113] [Refrigeration apparatus 300 according to the 13th embodiment] Next, the refrigeration system 300 of the 13th embodiment will be described. Figure 15 is a schematic diagram showing the refrigeration system 300 according to the 13th embodiment. The refrigeration system 300 may also include a rotating machine 100 and a transport protection device 110. In the description of the 13th embodiment, the same descriptions as in the above embodiments will be omitted.

[0114] The refrigeration system 300 shown in Figure 15 is used, for example, in air conditioning systems, refrigeration equipment, and refrigerator equipment. The refrigeration system 300 may also be used in other equipment. The refrigeration system 300 performs a refrigeration cycle. The refrigeration cycle of the refrigeration system 300 is a vapor compression refrigeration cycle. The refrigeration system 300 comprises a rotating machine 100 which is a turbo compressor, a condenser 320, an expansion valve 330, and an evaporator 340. The refrigeration system 300 may also be a refrigerator. The rotating machine 100 which is a turbo compressor comprises an impeller 10 connected to a rotating shaft 20. The impeller 10 is an example of a compression mechanism.

[0115] The refrigerant, which is the working fluid of the refrigeration system 300, is not particularly limited. The rotating machine 100 compresses the refrigerant gas. The condenser 320 condenses the refrigerant gas compressed by the rotating machine 100. The expansion valve 330 expands the refrigerant condensed by the condenser 320. The evaporator 340 evaporates the refrigerant expanded by the expansion valve 330. The refrigerant gas evaporated in the evaporator 340 is drawn into the rotating machine 100.

[0116] The rotating machine 100 reversibly adiabatically compresses the refrigerant gas. The refrigerant gas supplied to the condenser 320 releases heat at a constant pressure and liquefies. The liquefied refrigerant irreversibly expands at a constant enthalpy in the expansion valve 330, causing a portion of the refrigerant to evaporate. The refrigerant absorbs heat at a constant pressure in the evaporator 340.

[0117] The refrigeration unit 300 is equipped with piping L301 to L304 through which the refrigerant flows. Piping L301 is an intake pipe connecting the evaporator 340 and the rotating machine 100. Piping L302 connects the rotating machine 100 and the condenser 320. Piping L303 connects the condenser 320 and the expansion valve 330. Piping L304 connects the expansion valve 330 and the evaporator 340.

[0118] The refrigerant gas flows through piping L301 and is drawn into the rotating machine 100. The refrigerant gas compressed in the rotating machine 100 flows through piping L302 and is supplied to the condenser 320. The refrigerant liquid liquefied in the condenser 320 flows through piping L303 and flows into the expansion valve 330. The refrigerant expanded in the expansion valve 330 flows through piping L304 and is supplied to the evaporator 340. The refrigerant gas that has absorbed heat in the evaporator 340 flows through piping L301 and is supplied to the rotating machine 100.

[0119] The refrigeration unit 300 is equipped with an inverter 380. The inverter 380 controls the rotational speed of the motor 40. The inverter 280 is a controller that controls the operating frequency of the motor 40. By controlling the operating frequency of the motor 40, the inverter 380 can change the rotational speed of the impeller 10 and the rotating shaft 20.

[0120] The refrigeration system 300 includes a control unit 350. The control unit 350 includes a CPU and a memory unit. The CPU (Center Processing Unit) is responsible for the overall processing in the refrigeration system 300. The CPU can control the rotational speed of the motor 40 via the inverter 380. The CPU can control the opening and closing operation of the expansion valve 330. During operation of the refrigeration system 300, the control unit 350 can control the position of the rotating shaft 20 by controlling the magnetic actuators (radial magnetic bearing, thrust magnetic bearing). The control unit 350 may also be the controller 200 of the transport protection device 110. The control unit 350 of the refrigeration system 300 may also perform control in the transport protection device 110. The refrigeration system 300 may also have a controller 200 of the transport protection device 110 separately from the control unit 350.

[0121] Such a refrigeration system 300 includes a rotating machine 100 which is a turbo compressor, and the rotating machine 100 may also include a transport protection device 110. The transport protection device 110 can generate magnetic attractive forces F11 and F12 by supplying current to magnetic actuators 31a and 32a when the rotating machine 100 is being transported. The rotating machine 100 transported using the transport protection device 110 can be applied to the refrigeration system 300.

[0122] [Rotating machine unit in a specific configuration] The rotating machine unit comprises a transport protection device 110, a rotating shaft 20, protective bearings 35, 36 that can contact and support the rotating shaft 20, magnetic actuators 31a, 32a that can support the rotating shaft 20 without contact by generating a magnetic attractive force that causes the rotating shaft 20 to move away from the protective bearings 35, 36, and a rotating machine 100 having a casing 50 that houses the rotating shaft 20, the protective bearings 35, 36, and the magnetic actuators 31a, 32a.

[0123] The rotating machine unit may include a rotating machine 100 and a transport protection device 110. The rotating machine 100 comprises a rotating shaft 20, protective bearings 35, 36, a bearing device 30, and a casing 50, as described above.

[0124] According to the rotating machine unit of this embodiment, the current supply unit 201 and the control unit 210 of the transport protection device 110 may be utilized during normal operation after transport.

[0125] The rotating machine 100 is not limited to a turbo compressor, but may be a rotary compressor or other type of compressor. The rotating machine 100 is not limited to a compressor, but may be a pump, a blower (fan, blower), a power generator, a motor, or other type of rotating machine. The rotating machine 100 includes, for example, a rotating shaft 20 and a bearing device 30. The bearing device 30 does not have to be a magnetic bearing device. The transport protection device 110 may include magnetic actuators 31a, 32a provided separately from the bearing device 30.

[0126] [Compressor unit according to the embodiment] The compressor unit may include a transport protection device 110, a rotating machine 100, and an impeller (compression mechanism) 10 driven by a rotating shaft 20. The rotating machine 100 may be a motor 40 having a rotating shaft 20. The impeller 10 rotates due to the driving force of the motor and compresses the refrigerant gas. According to the compressor unit of this embodiment, the current supply unit 201 and the control unit 210 of the transport protection device 110 can be utilized during normal operation after transport.

[0127] The rotating machine 100 may also be a compressor. In this case, the rotating machine 100 may include a rotating shaft 20, a motor 40, and an impeller 10. The compressor unit may be a turbo compressor (centrifugal or mixed flow type), a rotary compressor, or any other type of compressor, as described above.

[0128] [Regarding the specified value] As described above, the control unit 210 can apply a force exceeding a predetermined value to the rotating shaft 20. Figure 16 shows the force acting on the rotating body 82 placed on the transport body 81. The predetermined value is set so that the contact state between the rotating body 82 and the transport body 81 is maintained even when subjected to an impact (acceleration A) expected during transport. Here, as shown in Figure 16, we consider the electromagnetic force F required to maintain the contact state between the rotating body 82 and the transport body 81 by applying an electromagnetic force F vertically downward. The contact state between the rotating body 82 and the transport body 81 may also be the contact state between the rotating shaft 20 and the protective bearings 35, 36. The electromagnetic force F may also be a magnetic attractive force F11.

[0129] In considering the required electromagnetic force F, the equilibrium equation for the rotating body 82 (equation (1) below) is derived based on the following preconditions (1) to (4). Prerequisite (1): The rotating body 82 is placed on protective bearings 35, 36 and is not fixed to protective bearings 35, 36. Prerequisite (2): The casing 50, magnetic bearing (bearing device 30), and protective bearings 35, 36 are fixed to the transport body 81. Prerequisite (3): For simplification, it is assumed that protective bearings 35 and 36 and a magnetic bearing are located at the center of gravity of the rotating body 82. Prerequisite (4): The downward vertical direction is considered positive.

[0130] Here, we formulate the equilibrium equation (1) when the rotating body 82 is at rest relative to the transport body 81. The rotating body 82 is subjected to an inertial force mA due to the impact during transport, gravity mg, an electromagnetic force F, and a normal force N. In equilibrium equation (1), we calculate the electromagnetic force F such that the normal force N is always greater than 0 when the assumed inertial force mA occurs.

[0131] The value of acceleration A of the transport body 81 during transport can be set by referring to general industrial standards (ISO, JIS) or the standards of individual product groups (ASHRAE in the case of refrigerators). In this example, the maximum value and direction of acceleration A were assumed by referring to JIS and ASHRAE. It is preferable to determine acceleration A by actual measurement.

[0132] The user can calculate the required electromagnetic force F by multiplying the result of the equilibrium equation by a predetermined multiplier, thereby adding a margin. The predetermined multiplier is preferably, for example, 3 times or less. When the predetermined multiplier is 3 times or less, power consumption and heat generation can be suppressed.

[0133] In this example, the required electromagnetic force F was 9 mg. In this example, the calculations for preconditions (2) and (3) were simplified, but the fixed state of the transport body 81 and the casing 50, and the arrangement of the magnetic bearings and protective bearings 35 and 36 may be specifically considered.

[0134] [Equation of equilibrium] The equilibrium equation (1) about the center of mass of the rotating coordinate system is as follows. This equation (1) is the force equilibrium equation (1) when the rotating body 82 is at rest relative to the transport body 81. F + mg - N - mA = 0 ... (1) In equation (1), "F" represents the electromagnetic force acting on the rotating body 82. "m" is the mass of the rotating body 82. "mg" represents the gravitational force acting on the rotating body 82. "N" is the normal force acting on the rotating body 82. "mA" is the inertial force acting on the rotating body 82. The direction of the inertial force mA is random.

[0135] Here, we determine the electromagnetic force F required to prevent the rotating body 82 from floating relative to the transport body 81. The condition for the rotating body 82 not floating relative to the transport body 81 is that it satisfies the following equation (2). N>0···(2)

[0136] By substituting equation (2) into the equilibrium equation (1) above, we obtain equations (3) to (5) below. F + mg - mA = N > 0 ... (3) F+m(gA)>0···(4) F>m(Ag)···(5)

[0137] If the electromagnetic force F satisfies equation (5) above, the rotating body 82 will not float relative to the transport body 81.

[0138] Here, we estimate the range of impact (acceleration A) applied to the transport body 81. During transport, the vehicle is subjected to impacts of up to approximately 10G in random directions. Therefore, the following inequality (6) holds true. -10g <A<10g···(6)

[0139] Assuming a maximum value for acceleration A based on ASHRAE, the worst-case scenario for acceleration A during transport is approximately 10G. Therefore, the electromagnetic force F required to prevent the rotating body 82 from floating away from the transport body is calculated to be 9 times its own weight, as shown in equation (7) below. F>m(10g-g)=9mg···(7)

[0140] Preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described above. Various modifications, substitutions, etc., can be applied to the embodiments described above without departing from the scope of the present invention. Furthermore, features described separately can be combined as long as no technical inconsistencies arise.

[0141] In the above embodiment, a refrigeration system 300 equipped with a rotating machine 100 is illustrated, but the rotating machine 100 can be applied to uses other than the refrigeration system 300. The internal fluid of the rotating machine 100 is not limited to a refrigerant.

[0142] One aspect of the present invention may be as follows:

[0143] <1> A transport protection device (110) for a rotating machine (100) is provided, comprising a rotating body (20), bearings (35, 36) that can contact and support the rotating body, and magnetic actuators (31a, 32a) that can support the rotating body without contact by generating a magnetic attractive force that causes the rotating body to move away from the bearings, all housed within a casing (50), A current supply unit (201) generates magnetic attractive forces (F11, F12) from the rotating body toward the bearings by supplying current to the magnetic actuator during the transport of the rotating machine, A transport protection device comprising a control unit (210) that controls the current supply unit. <2> The control unit controls the current supply unit so that the magnetic attraction force exceeds a reference value. <1> Transport protection device as described above. <3> The system includes a gap sensor (71) for detecting the length of the gap between the rotating body and the bearing, The control unit controls the current supply unit based on the detection result of the gap sensor. <1> or <2> Transport protection device as described above. <4> The casing is equipped with an acceleration sensor that is attached to the casing and detects the acceleration of the casing, The control unit controls the current supply unit based on the detection result of the acceleration sensor. <1> ~ <3> A transport protection device as described in any one of the following. <5> The magnetic attractive force includes the above component which is directed downward in the vertical direction. <1> ~ <4> A transport protection device as described in any one of the following. <6> The magnetic attractive force includes the above-mentioned horizontal component. <1> ~ <4> A transport protection device as described in any one of the following. <7> A transport protection device (110) for a rotating machine (100) is provided, comprising a rotating body (20), bearings (35, 36) that can contact and support the rotating body, and magnetic actuators (31a, 32a) that can support the rotating body without contact by generating a magnetic attractive force that causes the rotating body to move away from the bearings, all housed within a casing (50), The magnetic actuator has a first coil (33a) and a second coil (34a), A current supply unit (201) generates a first magnetic attractive force (F21) in a first direction (X1 direction), which is one direction in the horizontal direction, by supplying current to the first coil during the transport of the rotating machine, and generates a second magnetic attractive force (F22) in a second direction (X2 direction), which is the opposite direction to the first direction in the horizontal direction, by supplying current to the second coil. A gap sensor (71) detects the length of the gap between the rotating body and the bearing in the horizontal direction, A transport protection device comprising: a control unit (210) that controls the current supply unit so that the rotating body and the bearing do not come into contact in the horizontal direction based on the detection result of the gap sensor. <8> The magnetic actuator comprises two or more coils (33a, 34a), The current supply unit generates magnetic attraction force by supplying current to a number of coils less than the number of coils during transport. <1> ~ <7> A transport protection device as described in any one of the following. <9> The transport protection device is configured separately from the rotating machine. <1> ~ <8> A transport protection device as described in any one of the following. <10> The above <1> ~ <8> A transport protection device (110) described in any one of the following, A rotating body (20) and Bearings (35, 36) that contact the rotating body and support the rotating body, A magnetic actuator (31a, 32a) that can support the rotating body without contact by generating a magnetic attractive force that causes the rotating body to move away from the bearing, A rotating machine (100) comprising a casing (50) housing the rotating body, the bearing, and the magnetic actuator, Rotating machine unit. <11> The above <1> ~ <8> A transport protection device (110) described in any one of the following, The aforementioned rotating machine (100) and The system comprises a compression mechanism (10) driven by the rotating body (20), Compressor unit. <12> The above <1> ~ <8> A transport protection device (110) described in any one of the following, The aforementioned rotating machine (100) and The system comprises a refrigerant circuit having a compression mechanism (10), an evaporator (340), and a condenser (320) driven by the aforementioned rotating body. Refrigeration equipment (300). <13> A method for transporting a rotating machine, comprising a rotating body, a bearing capable of supporting the rotating body by contacting it, and a magnetic actuator capable of supporting the rotating body without contact by generating a magnetic attractive force that causes the rotating body to move away from the bearing, the method for transporting a rotating machine, wherein the rotating machine is housed within a casing, The first step is to load the aforementioned rotating machine onto a transport machine (120), A second step involves transporting the rotating machine by the transport machine while supplying current to the magnetic actuator, A method for transporting a rotating machine, comprising a third step of unloading the rotating machine from the transport machine. <14> In the second step described above, the magnetic actuator is cooled as described above. <13> A method for transporting the rotating machinery described above. <15> In the first step, while supplying current to the magnetic actuator, the rotating machine is loaded onto the transport machine. In the third step, the rotating machine is lowered from the transport machine while supplying current to the magnetic actuator. <13> or <14> A method for transporting the rotating machinery described above. [Explanation of Symbols]

[0144] 100 Rotating Machines 110 Transport protection devices 20. Rotating axis (rotating body) 30 Bearing device 31a, 32a Magnetic actuator 35,36 Protective bearings (bearings) 50 casing 71 Gap Sensor 77 Accelerometer 81 Transport Unit 82. Solids of revolution 120 Transport machinery 200 controllers 201 Current supply section 210 Control Unit 300 Refrigeration equipment F electromagnetic force F11, F12 Magnetic attraction force F21 Magnetic attraction force (first magnetic attraction force) F22 Magnetic attraction force (second magnetic attraction force) X1 X1 direction (first direction) X2 X2 direction (second direction)

Claims

1. A transport protection device (110) for a rotating machine (100) is provided, comprising a rotating body (20), bearings (35, 36) that can contact and support the rotating body, and magnetic actuators (31a, 32a) that can support the rotating body without contact by generating a magnetic attractive force that causes the rotating body to move away from the bearings, all housed within a casing (50), A current supply unit (201) generates magnetic attractive forces (F11, F12) from the rotating body toward the bearings by supplying current to the magnetic actuator during the transport of the rotating machine, A transport protection device comprising a control unit (210) that controls the current supply unit.

2. The transport protection device according to claim 1, wherein the control unit controls the current supply unit so that the magnetic attraction force exceeds a reference value.

3. The system includes a gap sensor (71) for detecting the length of the gap between the rotating body and the bearing, The transport protection device according to claim 1, wherein the control unit controls the current supply unit based on the detection result of the gap sensor.

4. The casing is equipped with an acceleration sensor that is attached to the casing and detects the acceleration of the casing, The transport protection device according to claim 1, wherein the control unit controls the current supply unit based on the detection result of the acceleration sensor.

5. The transport protection device according to any one of claims 1 to 4, wherein the magnetic attractive force includes a component that is downward in the vertical direction.

6. The transport protection device according to any one of claims 1 to 4, wherein the magnetic attractive force includes a horizontal component.

7. A transport protection device (110) for a rotating machine (100) is provided, comprising a rotating body (20), bearings (35, 36) that can contact and support the rotating body, and magnetic actuators (31a, 32a) that can support the rotating body without contact by generating a magnetic attractive force that causes the rotating body to move away from the bearings, all housed within a casing (50), The magnetic actuator has a first coil (33a) and a second coil (34a), A current supply unit (201) that, when transporting the rotating machine, supplies current to the first coil to generate a first magnetic attractive force (F21) in a first direction (X1 direction), which is one direction in the horizontal direction, and supplies current to the second coil to generate a second magnetic attractive force (F22) in a second direction (X2 direction), which is the opposite direction to the first direction in the horizontal direction, A gap sensor (71) detects the length of the gap between the rotating body and the bearing in the horizontal direction, A transport protection device comprising: a control unit (210) that controls the current supply unit so that the rotating body and the bearing do not come into contact in the horizontal direction based on the detection result of the gap sensor.

8. The magnetic actuator comprises two or more coils (33a, 34a), The transport protection device according to claim 1 or 7, wherein the current supply unit generates a magnetic attractive force during transport by supplying current to a number of coils less than the number of coils.

9. The transport protection device according to claim 1 or 7, wherein the transport protection device is configured separately from the rotating machine.

10. A transport protection device (110) according to claim 1 or 7, Rotating body (20) and Bearings (35, 36) that contact the rotating body and support the rotating body, A magnetic actuator (31a, 32a) that can support the rotating body without contact by generating a magnetic attractive force that causes the rotating body to move away from the bearing, A rotating machine (100) comprising a casing (50) housing the rotating body, the bearing, and the magnetic actuator, Rotating machine unit.

11. A transport protection device (110) according to claim 1 or 7, The aforementioned rotating machine (100), The system comprises a compression mechanism (10) driven by the rotating body (20). Compressor unit.

12. A transport protection device (110) according to claim 1 or 7, The aforementioned rotating machine (100), The system includes a refrigerant circuit having a compression mechanism (10), an evaporator (340), and a condenser (320) driven by the aforementioned rotating body. Refrigeration device (300).

13. A method for transporting a rotating machine, comprising a rotating body, a bearing capable of supporting the rotating body by contacting it, and a magnetic actuator capable of supporting the rotating body without contact by generating a magnetic attractive force that causes the rotating body to move away from the bearing, the method for transporting a rotating machine, wherein the rotating machine is housed within a casing, The first step is to load the aforementioned rotating machine onto a transport machine (120), A second step involves supplying current to the magnetic actuator while transporting the rotating machine using the transport machine, A method for transporting a rotating machine, comprising a third step of unloading the rotating machine from the transport machine.

14. The method for transporting a rotating machine according to claim 13, wherein the second step involves cooling the magnetic actuator.

15. In the first step, while supplying current to the magnetic actuator, the rotating machine is loaded onto the transport machine. The method for transporting a rotating machine according to claim 13 or 14, wherein the third step involves lowering the rotating machine from the transport machine while supplying current to the magnetic actuator.

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