Transport protection device, rotating machine unit, compressor unit, refrigeration device, and method for transporting a rotating machine

Abstract

To avoid increasing the size of the device and to protect the bearings during transportation. [Solution] The transportation protection device 110 is a transportation protection device 110 for a rotating machine 100 that has a rotating body 20, bearings 35, 36 that can contact the rotating body to support the rotating body, and magnetic actuators 31a, 32a that can support the rotating body without contact by generating a magnetic attraction force that moves the rotating body away from the bearings, stored within a casing 50, and is equipped with a current supply unit 201 that generates magnetic attraction forces F11, F12 from the rotating body toward the bearings by supplying current to the magnetic actuators during transportation of the rotating machine, and a control unit 210 that controls the current supply unit.

Description

[Technical Field]

[0001] The present disclosure relates to a transportation protection device, a rotating machine unit, a compressor unit, a refrigeration unit, and a method for transporting a rotating machine. [Background technology]

[0002] For example, a magnetic bearing device is known that includes protective ball bearings on the top and bottom of the drive shaft, a set of axial direction control electromagnets that controls the position of the drive shaft in the direction of the rotation axis, and two sets of radial direction control electromagnets that control the position of the drive shaft in two mutually perpendicular axial directions at two points on the rotation axis (see Patent Document 1). The magnetic bearing device is equipped with a displacement detection sensor that detects the displacement of the drive shaft rotating at high speed. The magnetic bearing device feeds back signals from the displacement detection sensor to the magnetic bearing control unit, and controls the excitation current of the electromagnets to adjust the attractive force of the electromagnets and maintain the position of the drive shaft within a predetermined range. The magnetic bearing device is equipped with permanent magnets that are arranged adjacent to the radial direction electromagnets and only at specific phases in the radial direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-213539 Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional technology, the device may become large because it is equipped with a permanent magnet.

[0005] The present disclosure aims to provide a transportation protection device, a rotating machine unit, a compressor unit, a refrigeration device, and a method for transporting a rotating machine, which can avoid increasing the size of the device and protect bearings during transportation. [Means for solving the problem]

[0006] A transportation protection device according to one aspect of the present disclosure is a transportation protection device for a rotating machine that has a rotating body, a bearing that can support the rotating body by contacting the rotating body, and a magnetic actuator that can support the rotating body without contact by generating a magnetic attraction force that moves the rotating body away from the bearing, stored within a casing, and is equipped with a current supply unit that supplies current to the magnetic actuator during transportation of the rotating machine to generate a magnetic attraction force from the rotating body toward the bearing, and a control unit that controls the current supply unit.

[0007] The transportation protection device of this aspect can hold the rotating body by generating a magnetic attraction force from the rotating body toward the bearing during transportation of the rotating machine. This can suppress relative movement of the rotating body with respect to the bearing during transportation. As a result, collisions between the rotating body and the bearing during transportation can be suppressed, and damage to the rotating body and the bearing can be prevented. The transportation protection device does not require a permanent magnet to suppress relative movement of the rotating body with respect to the bearing, and therefore can avoid an increase in the size of the device.

[0008] In a transportation protection device according to an aspect of the present disclosure, a control unit controls a current supply unit so that the magnetic attraction force exceeds a reference value. In the transportation protection device configured as described above, by controlling the current supply unit, a magnetic attraction force exceeding the reference value is applied, thereby suppressing movement of the rotating body and protecting the bearing.

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

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

[0011] In the transportation protection device according to an aspect of the present disclosure, the magnetic attractive force may include a vertically downward component, thereby allowing the magnetic attractive force including the vertically downward component to act from the rotating body toward the bearing during transportation of the rotating machine.

[0012] In the transportation protection device according to an aspect of the present disclosure, the magnetic attractive force may include a horizontal component, thereby allowing the magnetic attractive force including the horizontal component to act from the rotating body toward the bearing during transportation of the rotating machine.

[0013] A transportation protection device according to one embodiment of the present disclosure is a transportation protection device for a rotating machine that has a casing containing a rotating body, a bearing that can support the rotating body by contacting the rotating body, and a magnetic actuator that can support the rotating body without contact by generating a magnetic attraction force that moves the rotating body away from the bearing, wherein the magnetic actuator has a first coil and a second coil, and is equipped with a current supply unit that, during transportation of the rotating machine, supplies current to the first coil to generate a first magnetic attraction force in a first direction, which is one horizontal direction, and supplies current to the second coil to generate a second magnetic attraction 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 to prevent the rotating body and the bearing from coming into contact in the horizontal direction.

[0014] The transportation protection device of this aspect can generate a magnetic attraction force in a first direction by supplying current to the first coil during transportation of the rotating machine, thereby displacing the rotating body in the first direction. The transportation protection device can generate a magnetic attraction force in a second direction by supplying current to the second coil during transportation of the rotating machine, thereby displacing the rotating body in the second direction. The transportation protection device can generate a magnetic attraction force in the first or second direction in the horizontal direction based on the detection result of the gap sensor, thereby preventing contact between the rotating body and the bearing. The transportation protection device does not require a permanent magnet to suppress relative movement of the rotating body with respect to the bearing, thereby avoiding an increase in the size of the device.

[0015] In a transportation protection device according to one embodiment of the present disclosure, the magnetic actuator includes two or more coils, and the current supply unit generates a magnetic attractive force during transportation by supplying current to a number of coils that is less than the number of the coils. The transportation protection device includes a coil for generating a magnetic attractive force during normal operation of the rotating machine, separate from the coil that generates the magnetic attractive force during transportation. The two or more coils may include the first coil and the second coil. The transportation protection device may generate a magnetic attractive force during transportation using a coil of a magnetic bearing of the rotating machine.

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

[0017] A rotating machine unit according to one aspect of the present disclosure includes a rotating machine having the above-described transportation protection device, a rotating body, a bearing capable of supporting the rotating body by contacting the rotating body, a magnetic actuator capable of supporting the rotating body without contact by generating a magnetic attraction force that moves the rotating body away from the bearing, and a casing that houses the rotating body, bearing, and magnetic actuator. The rotating machine unit includes the rotating machine and the above-described transportation protection device. The rotating machine has the rotating body, bearing, magnetic actuator, and casing. According to the rotating machine unit of this aspect, the current supply unit and control unit of the transportation protection device can be utilized during normal operation after transportation.

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

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

[0020] A method for transporting a rotating machine according to one embodiment of the present disclosure is a method for transporting a rotating machine that has a rotating body, a bearing that can support the rotating body by contacting the rotating body, and a magnetic actuator that can support the rotating body without contact by generating a magnetic attraction force that moves the rotating body away from the bearing, stored in a casing, and 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 of this aspect, when transporting the rotating machine, a current is passed through the magnetic actuator to generate a magnetic attractive force from the rotating body toward the bearing, thereby holding the rotating body. This makes it possible to suppress relative movement of the rotating body with respect to the bearing during transportation. 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 equipment can be avoided.

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

[0023] In the method for transporting a rotating machine of this aspect, in a first step, the rotating machine may be loaded onto a transport machine while supplying current to the magnetic actuator, and in a third step, the rotating machine may be unloaded from the transport machine while supplying current to the magnetic actuator. When loading the rotating machine onto the transport machine, there is a risk that the rotating body may move relative to the transport machine, but the rotating body can be held by passing a current through the magnetic actuator. When unloading the rotating machine from the transport machine, there is a risk that the rotating body may move relative to the transport machine, but the rotating body can be held by passing a current through the magnetic actuator. This makes it possible to prevent damage to the rotating body and bearings when loading the rotating machine onto the transport machine and when unloading the rotating machine from the transport machine. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a cross-sectional view showing a rotating machine and a transportation protection device according to a first embodiment. [Figure 2] 1 is a block diagram showing a hardware configuration of a transport protection device according to a first embodiment. [Figure 3]FIG. 10 is a cross-sectional view showing a rotating machine and a transportation protection device according to a third embodiment. [Figure 4] FIG. 10 is a block diagram showing a hardware configuration of a transport protection device according to a third embodiment. [Figure 5] FIG. 10 is a cross-sectional view showing a rotating machine and a transportation protection device according to a fourth embodiment. [Figure 6] FIG. 10 is a cross-sectional view showing a rotating machine and a transportation protection device according to a fifth embodiment. [Figure 7] FIG. 11 is a block diagram showing a hardware configuration of a transport protection device according to a fifth embodiment. [Figure 8] FIG. 10 is a cross-sectional view showing a rotating machine and a transportation protection device according to a sixth embodiment. [Figure 9] FIG. 13 is a cross-sectional view showing a rotating machine and a transportation protection device according to a seventh embodiment. [Figure 10] FIG. 13 is a cross-sectional view showing a rotating machine and a transportation protection device according to an eighth embodiment. [Figure 11] FIG. 13 is a process chart showing the procedure of a method for transporting a rotary machine according to a ninth embodiment. [Figure 12] FIG. 22 is a side view showing a rotating machine, a transportation protection device, and a transportation machine according to a tenth embodiment. [Figure 13] FIG. 22 is a side view showing a refrigeration device and a transport machine according to an eleventh embodiment. [Figure 14] FIG. 23 is a side view showing a rotating machine, a transportation protection device, and a transportation machine according to a twelfth embodiment. [Figure 15] FIG. 22 is a schematic diagram showing a refrigeration device according to a thirteenth embodiment. [Figure 16] FIG. 10 illustrates the forces acting on a rotating body placed on a transport body. DETAILED DESCRIPTION OF THE INVENTION

[0025] Non-limiting examples of the present disclosure will be described with reference to the accompanying drawings. In the accompanying drawings, identical or corresponding members or components are designated by identical or corresponding reference numerals. Further, duplicate descriptions of identical or corresponding members or components will be omitted below. Furthermore, members or components are not necessarily drawn to scale in the drawings. Therefore, those skilled in the art can arbitrarily determine specific dimensions by referring to the following non-limiting examples. Furthermore, the following examples are illustrative rather than limiting the invention. Furthermore, the features and combinations thereof described in the examples are not necessarily essential to the invention.

[0026] [Rotating Machine 100] Before describing the transportation protection device 110, the rotating machine 100 will be described. FIG. 1 is a cross-sectional view showing the rotating machine 100 and the transportation 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 a rotating shaft 20. The turbo compressor compresses, for example, a refrigerant.

[0027] The rotary machine 100 includes 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 end portions 20a and 20b that face each other in the longitudinal direction. The longitudinal direction of the rotating shaft 20 is the direction in which the center line C1 of the rotating shaft 20 extends. The impeller is provided, for example, at end portion 20a of the rotating shaft 20.

[0028] [Motor 40] The motor 40 is a driving source of the rotary machine. The motor 40 has a rotor 41 and a stator 42. The rotor 41 is fixed to the rotary shaft 20 and rotates together with the rotary shaft 20. The stator 42 is fixed to the casing 50 and is disposed around the rotor 41. The motor 40 rotates the rotary shaft 20 to drive the impeller.

[0029] [Casing 50] The casing 50 accommodates the rotating shaft 20, the bearing device 30, and the motor 40. The casing 50 has a compression chamber that accommodates the impeller, and a motor chamber that accommodates 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 a casing 50. The bearings 31 and 32 are radial magnetic bearings, and the 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 "vertically placed" or "horizontally placed." "Vertical placement" may mean that the center line C1 of the rotating body is arranged along the vertical direction. "Horizontally placed" may mean that the center line C1 of the rotating body is arranged along the horizontal direction.

[0031] The bearings 31 to 34 are magnetic bearings that support the rotating shaft using magnetic attractive force or magnetic repulsive force. The bearings 31 to 34 may be active magnetic bearings (AMB). The bearings 31 and 32, which are radial magnetic bearings, include electromagnets arranged around the rotating shaft 20. The electromagnets have an iron core and a coil. The bearings 33 and 34, which are thrust magnetic bearings, include an axial disk 21 that protrudes radially outward from the rotating shaft 20, and an electromagnet 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] The bearings 31 to 34 are, for example, oil-less bearings. The bearing device 30 may include a sliding bearing or a rolling bearing. The bearing device 30 may include a hydrostatic bearing. An oil-less bearing is a bearing that does not require the supply of lubricating oil. Examples of oil-less bearings include gas bearings, air bearings, foil bearings, and magnetic bearings.

[0033] The bearings 31 to 34 may be air bearings. An air bearing is a type of hydrostatic bearing in which compressed air is blown between the rotating shaft 20 and the bearing surface, and the rotating shaft 20 is lifted by the air pressure to support the load. The bearings 31 and 32 may be gas bearings in which compressed gas is blown between the rotating shaft 20 and the bearing surface to lift the rotating shaft 20. The gas bearings may be those in which refrigerant gas is blown onto the rotating shaft 20 as the compressed gas to lift it.

[0034] The bearings 31 to 34 may be foil bearings, which are a type of air dynamic bearing. Foil bearings have a thin film (foil) as a bearing surface. The thin film has low bending rigidity and is flexible. Foil bearings support a load by allowing the foil to flex. 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 fluid film. Due to the flexibility of the foil, the foil bearing can form a bearing gap according to the rotation speed of the rotating shaft 20, the load on the rotating shaft 20, the temperature around the rotating shaft 20, and other operating conditions.

[0035] The types, positions, and numbers of the bearings 31 to 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 arranged between the bearing 31 and the end portion 20a in the longitudinal direction of the rotating shaft 20. The protective bearing 36 is arranged between the bearing 32 and the bearing 33 in the longitudinal direction of the rotating shaft 20.

[0037] The protective bearings 35, 36 may be touchdown bearings. Touchdown bearings are also called auxiliary bearings or backup bearings. Touchdown bearings limit the movable range of the rotating shaft 20. Touchdown bearings can limit the movable range of the rotating shaft 20 in the radial direction. Touchdown bearings can limit the movable range 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 includes a magnetic actuator that can support the rotating shaft 20 in a non-contact manner by generating a magnetic attraction force that moves the rotating shaft 20 away from the bearings 31 to 34. The bearings 31 to 34 each have an electromagnet as a magnetic actuator.

[0039] [Transportation protection device 110 according to the first embodiment] Next, a transportation protection device 110 according to the first embodiment will be described. The transportation protection device 110 protects the bearing device 30 and the rotating shaft 20 during transportation of the rotating machine 100. The transportation 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] During transportation of the rotating machine 100, the current supply unit 201 supplies current to the magnetic actuators 31a and 32a, thereby generating magnetic attractive forces F11 and F12 from the rotating shaft 20 toward the bearings 31 and 32. The center line C1 of the rotating shaft 20 is disposed, for example, along the horizontal direction. The Z1 direction shown in FIG. 1 is the downward 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 magnitudes of the magnetic attractive forces F11 and F12 exceed a reference value. The control unit 210 may calculate the reference value by multiplying the gravity acting on the rotating shaft 20 (gravity due to its own weight) by a predetermined magnification. The control unit 210 may change the reference value by changing the predetermined magnification. The control unit 210 can apply a force exceeding the predetermined value to the rotating shaft 20. The "predetermined value" will be described later.

[0043] Fig. 2 is a block diagram showing the hardware configuration of the transportation protection device 110 according to the first embodiment. As shown in Fig. 2, the control unit 210 includes a CPU 211 and a storage unit 212. The CPU (Center Processing Unit) 211 controls the overall processing in the transportation 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 the bearings 31 and 32. The magnetic actuators 31a and 31b may be electromagnets separate from the magnetic bearings.

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

[0045] The storage unit 212 stores information about the bearing device 30. The storage unit 212 stores, for example, information about the weight of the rotating body, the current supplied 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 provided on the rotating shaft 20. The information about the current supplied during rotation includes information about the value of the current supplied to the bearings 31 to 34 during normal operation of the rotating machine 100.

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

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

[0048] If the power source 111 is a battery dedicated to the transport protection device 110, it can supply current to the magnetic actuator during transport independent of the transport aircraft.

[0049] [Operation and effect of the transport protection device 110 according to the first embodiment] The transportation protection device 110 according to this embodiment is a transportation protection device 110 for a rotating machine 100 that includes 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 moves the rotating shaft 20 away from the bearings 31 and 32, all stored in a casing 50. The transportation protection device 110 includes a current supply unit 201 that supplies current to the magnetic actuators 31a and 31b during transportation of the rotating machine 100 to generate magnetic attractive forces F11 and F12 from the rotating shaft 20 toward the bearings 31 and 32, and a control unit 210 that controls the current supply unit 201. "Away from the bearings" means that the bearing surfaces and the rotating body are not in contact with each other.

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

[0051] In the transportation protection device 110, the control unit 210 controls the current supply unit 201 so that the magnetic attraction forces F11 and F12 exceed the reference values. In the transportation protection device 110 configured as described above, by controlling the current supply unit 201, it is possible to apply magnetic attraction forces F11 and F12 whose magnitudes exceed the reference values.

[0052] In the transportation protection device 110, the magnetic attractive forces F11 and F12 may include a vertically downward component. This allows a magnetic attractive force including a vertically downward component to act from the rotating shaft 20 toward the bearings 31 and 32 during transportation of the rotating machine 100.

[0053] The transportation 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 transportation protection device 110 may be separate from the rotating machine 100. This allows the transportation protection device 110 to be installed when transporting the rotating machine 100, and after transportation, the transportation protection device 110 can be removed and reused when transporting another rotating machine 100.

[0054] [Transportation protection device 110 according to the second embodiment] Next, a transportation protection device 110 according to a second embodiment will be described. The transportation protection device 110 according to the second embodiment differs from the transportation protection device 110 according to the first embodiment in that the transportation protection device 110 is built into the rotating machine 100. Note that in the description of the transportation protection device 110 according to the second embodiment, the same description as for the transportation protection device 110 according to the first embodiment will be omitted.

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

[0056] The transportation protection device 110 according to the second embodiment also achieves the same effects as the transportation protection device 110 according to the first embodiment. Since the transportation protection device 110 according to the second embodiment has the transportation protection device 110 built in, it is not necessary to install the transportation protection device 110 during transportation.

[0057] [Transportation protection device 110C according to the third embodiment] Next, a transportation protection device 110C according to a third embodiment will be described. FIG. 3 is a cross-sectional view showing a rotating machine 100 and a transportation protection device 110C according to the third embodiment. FIG. 4 is a block diagram showing a hardware configuration of the transportation protection device 110C according to the third embodiment. The transportation protection device 110C according to the third embodiment differs from the transportation protection device 110 according to the first embodiment in that, during transportation, magnetic attractive forces F21 and F22 including horizontal components are generated, and the directions and magnitudes of the magnetic attractive forces F21 and F22 are controlled based on the detection results of the gap sensor 71. Note that, in the description of the transportation protection device 110C according to the third embodiment, descriptions similar to those of the transportation protection device 110 according to the above embodiments will be omitted.

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

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

[0060] The transportation protection device 110C may include magnetic actuators 33a and 34a. The magnetic actuator 33a may have a first coil. The magnetic actuator 34a may have a second coil. The magnetic actuators 33a and 34a of the transportation protection device 110C may also serve as the magnetic actuators of the bearing device 30. The transportation 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 rotating shaft 20 in the axial direction. The gap sensors 71 may detect the position of the axial disc 21 in the axial direction.

[0062] The gap sensor 71 may detect the length of the gap between the axial disk 21 provided on the rotating shaft 20 and the bearings 33, 34. The control unit 210 may calculate the length of the gap between the axial disk 21 and the bearings 33, 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, F22 so that the step 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 step 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 step 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 a current to the coil of the magnetic actuator 33a to generate a magnetic attractive force F21. The current supply unit 201 supplies a current to the coil of the magnetic actuator 34a to generate a magnetic attractive force F22.

[0065] [Control unit 210] The control unit 210 controls the current supply unit 201 based on the detection result of the gap sensor 71 so that the step surface 22 of the rotating shaft 20 does not come into contact with the side surface of the protective bearing 36 in the horizontal direction. The control unit 210 controls the current supply unit 201 to change the direction and magnitude of the magnetic attraction forces F21 and F22.

[0066] [Operation and effect of transport protection device 110C according to the third embodiment] The transportation protection device 110C according to this embodiment is a transportation protection device 110C for a rotating machine 100, which includes a rotating shaft (rotating body) 20, protective bearings 35 and 36 that can contact the rotating shaft 20 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 attraction force that moves the rotating shaft 20 away from the bearings 31 and 32, stored in a casing 50. The magnetic actuator 33a has a first coil, and the magnetic actuator 34a has a second coil. When the rotating machine 100 is transported, a current is supplied to the first coil. The rotating shaft 20 includes a current supply unit 201 that generates a first magnetic attraction force F21 in a horizontal direction, that is, an X1 direction (first direction), and that generates a second magnetic attraction force F22 in a horizontal direction, that is, an X2 direction (second direction), by supplying current to a second coil; a gap sensor 71 that detects the length of the gap between the step 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 step surface 22 of the rotating shaft 20 and the protective bearing 36 do not come into contact with each other in the horizontal direction.

[0067] The transportation protection device 110C according to this embodiment generates a magnetic attractive force F21 in the X1 direction by supplying a current to the first coil of the magnetic actuator 33a during transportation of the rotating machine 100, thereby displacing the rotating shaft 20 in the X1 direction. The transportation protection device 110C generates a magnetic attractive force F22 in the X2 direction by supplying a current to the second coil of the magnetic actuator 34a during transportation of the rotating machine 100, thereby displacing the rotating shaft 20 in the X2 direction. The transportation protection device 110C generates the magnetic attractive forces F21 and F22 in the X1 direction or the X2 direction based on the detection result of the gap sensor 71, thereby preventing contact between the rotating shaft 20 (step surface 22) and the protective bearing 35. The transportation protection device 110C can prevent damage to the bearing device 30 due to horizontal impacts from outside the rotating machine 100 during transportation of the rotating machine 100. In the transport protection device 110C, there is no need to provide a permanent magnet to suppress the relative movement of the rotating shaft 20 with respect to the protection bearing 36, and it is possible to avoid 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 also detect other positions of the rotating shaft 20.

[0069] [Transportation protection device 110D according to the fourth embodiment] Next, a transportation protection device 110D according to a fourth embodiment will be described. Fig. 5 is a cross-sectional view showing a rotating machine 100 and the transportation protection device 110D according to the fourth embodiment. The transportation protection device 110D according to the fourth embodiment differs from the transportation protection device 110 according to the first embodiment in that the magnitude of the magnetic attractive forces F11, F12 is controlled based on the detection results of the gap sensors 73 to 76 during transportation. Note that in the description of the transportation protection device 110D according to the fourth embodiment, the same description as that of the transportation 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 to 76. The gap sensors 73 to 76 can detect the position of the rotating shaft 20 in the vertical direction. The gap sensors 73 to 76 can detect the length of the gap between the outer circumferential surface of the rotating shaft 20 and the gap sensors 73 to 76 in a direction perpendicular to the axial direction.

[0071] Gap sensor 73 is disposed below rotating shaft 20. Gap sensors 73 and 74 are disposed axially between bearing 32 and protective bearing 36. Gap sensor 74 is disposed above rotating shaft 20. Gap sensor 74 is disposed opposite gap sensor 73 in the radial direction of rotating shaft 20.

[0072] Gap sensor 75 is disposed below rotating shaft 20. Gap sensors 75 and 76 are disposed axially between bearing 31 and protective bearing 35. Gap sensor 76 is disposed above rotating shaft 20. Gap sensor 76 is disposed opposite gap sensor 75 in the radial direction of rotating shaft 20. [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, 36 based on the detection results of the gap sensors 73-76. The control unit 210 controls the current supply unit 201 based on the detection results of the gap sensors 73-76 so that the distance in the vertical direction between the lower surface of the outer circumferential surface of the rotating shaft 20 and the lower bearing surfaces of the protective bearings 35, 36 becomes zero. The control unit 210 controls the current supply unit 201 to control the magnitude of the magnetic attractive forces F11, F12.

[0073] The transportation protection device 110D according to the fourth embodiment also achieves the same effects as the transportation protection device 110 according to the first embodiment. The transportation protection device 110D according to the fourth embodiment includes gap sensors 73 to 76, and can generate magnetic attractive forces F11 and F12 so that the distance between the lower outer peripheral surface of the rotating shaft 20 and the lower bearing surfaces of the protective bearings 35 and 36 becomes zero. This prevents damage to the bearing device 30 due to impacts from outside the rotating machine 100 during transportation of the rotating machine 100. The transportation protection device 110D can control the current supplied to the magnetic actuators 31a and 32a during transportation based on the detection results of the gap sensors 73 to 76 so that the distance between the lower outer peripheral surface of the rotating shaft 20 and the lower bearing surfaces of the protective bearings 35 and 36 becomes zero. Therefore, the transportation protection device 110D can reduce power consumption during transportation compared to when current is constantly supplied. In the transport protection device 110D, the power supply 111 can be made smaller.

[0074] [Transportation protection device 110E according to the fifth embodiment] Next, a transportation protection device 110E according to a fifth embodiment will be described. FIG. 6 is a cross-sectional view showing a rotating machine 100 and a transportation protection device 110E according to the fifth embodiment. FIG. 7 is a block diagram showing a hardware configuration of the transportation protection device 110E according to the fifth embodiment. The transportation protection device 110E according to the fifth embodiment differs from the transportation protection device 110 according to the first embodiment in that the magnitude of the magnetic attractive forces F11 and F12 is controlled based on the detection result by the acceleration sensor 77 during transportation. Note that in the description of the transportation protection device 110E according to the fifth embodiment, descriptions similar to those of the transportation protection device 110 according to the above embodiments will be omitted.

[0075] [Acceleration Sensor 77] The transport protection device 110E includes an acceleration sensor 77. The acceleration sensor 77 is attached to, for example, the casing 50. The acceleration sensor 77 may 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 result of the acceleration sensor 77. The control unit 210 can control the magnitude of the magnetic attraction forces F11 and F12 in accordance with the acceleration acting on the casing 50.

[0077] The transportation protection device 110E according to the fifth embodiment also has the same effects as the transportation protection device 110 according to the first embodiment. The transportation protection device 110E according to the fifth embodiment is equipped with an acceleration sensor 77, and is capable of controlling the current supplied to the magnetic actuators 31a and 32a.

[0078] In the transportation protection device 110E, for example, when 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 transportation protection device 110E, for example, when 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] In the transport protection device 110E, power consumption can be reduced during transport compared to when current is constantly supplied, and the transport protection device 110E allows the power source 111 to be made smaller.

[0080] [Transportation protection device 110C according to a modified example] The transportation protection device 110C according to the modified example may include an acceleration sensor 77. The transportation protection device 110C may include the acceleration sensor 77 instead of the gap sensor 71. The control unit 210 may change the direction and magnitude of the magnetic attraction forces F21 and F22 based on the detection result by the acceleration sensor 77.

[0081] [Transportation protection device 110F according to the sixth embodiment] Next, a transportation protection device 110F according to a sixth embodiment will be described. FIG. 8 is a cross-sectional view showing a rotating machine 100 and a transportation protection device 110F according to the sixth embodiment. The transportation protection device 110F according to the sixth embodiment differs from the transportation protection device 110 according to the first embodiment in that, during transportation, magnetic attractive forces F11 and F12 are not generated, but a magnetic attractive force F22 is generated in the horizontal direction. Note that the transportation protection device 110 according to the sixth embodiment F In the description, the same description as that of the transport protection device 110 according to the above embodiment will be omitted.

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

[0083] The transportation protection device 110F according to the sixth embodiment generates a magnetic attractive force F22 from the rotating shaft 20 (axial disk 21) toward the bearing 34 during transportation of the rotating machine 100, thereby holding the rotating shaft 20. This makes it possible to suppress relative movement of the rotating shaft 20 with respect to the bearings 31-34 and the protective bearings 35, 36 during transportation. As a result, damage to the rotating shaft 20, the bearings 31-34, and the protective bearings 35, 36 during transportation can be prevented. The transportation protection device 110F can prevent damage to the bearing device 30 due to impacts from outside the rotating machine 100 during transportation of the rotating machine 100. The transportation protection device 110F does not require a permanent magnet to suppress relative movement of the rotating shaft 20 with respect to the bearings 31-34 and the protective bearings 35, 36, and therefore can avoid an increase in size of the device.

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

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

[0086] [Transportation protection device 110F according to a modified example] The transportation protection device 110F according to the modified example may generate a magnetic attraction force F21 in the horizontal direction. The transportation protection device 110F may generate a magnetic attraction force F21 in the opposite direction to the magnetic attraction force F22.

[0087] [Transportation protection device 110G according to the seventh embodiment] Next, a transportation protection device 110G according to a seventh embodiment will be described. FIG. 9 is a cross-sectional view showing a rotating machine 100 and a transportation protection device 110G according to the seventh embodiment. The transportation protection device 110G according to the seventh embodiment differs from the transportation protection device 110 according to the first embodiment in that, during transportation, magnetic attractive forces F11 and F12 including a vertical component and a magnetic attractive force F22 including a horizontal component are generated. Note that, in the description of the transportation protection device 110E according to the seventh embodiment, descriptions similar to those of the transportation protection device 110 according to the above embodiments will be omitted.

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

[0089] [Transportation protection device 110 according to the eighth embodiment H ] Next, the transport protection device 110 according to the eighth embodiment H FIG. 10 shows a rotary machine 100 and a transportation protection device 110 according to an eighth embodiment. H 11 is a cross-sectional view showing a transport protection device 110 according to an eighth embodiment. H However, the difference from the transportation protection device 110C according to the third embodiment is that during transportation, magnetic attractive forces F13 and F14 directed upward in the vertical direction are generated, and the magnitude and direction of the magnetic attractive forces F11, F12, F13, and F14 are controlled based on the detection results of the gap sensors 73 to 76. H In the description, the same description as that of the transport protection device 110 according to the above embodiment will be omitted.

[0090] [Current supply section 201] During transportation of the rotating machine 100, the current supply unit 201 supplies current to the magnetic actuators 31a and 32a, thereby generating magnetic attractive forces F13 and F14 from the rotating shaft 20 toward the bearings 31 and 32. The Z2 direction shown in Fig. 10 is the upward vertical direction. The magnetic attractive forces F13 and F14 include a vertically upward component.

[0091] [Method for transporting the rotary machine 100 according to the ninth embodiment] Next, a method for transporting a rotating machine 100 according to a ninth embodiment will be described. FIG. 11 is a process chart showing the steps of the method for transporting a rotating machine according to the ninth embodiment. In the method for transporting a rotating machine 100, the transport protection device 110 according to the above-described embodiments can be used. For example, the method for transporting a rotating machine 100 according to the embodiments can be applied when transporting the rotating machine 100 from a factory where the rotating machine 100 is manufactured to an installation location of the rotating machine 100. In this embodiment, a method for transporting a rotating machine 100 using the transport protection device 110 according to the first embodiment will be described. The method for transporting a rotating machine 100 may be performed using the transport protection devices according to the second to eighth embodiments.

[0092] The method for transporting the rotating machine 100 includes a step of loading the rotating machine 100 onto a transport machine (step S11). The transport machine may be a vehicle such as a truck. The implementer may use a transport machine such as a crane to lift the rotating machine 100 and place it on the bed of the truck.

[0093] Next, in the method for transporting the rotating machine 100, a step of supplying current to the magnetic actuators 31a and 32a is executed (step S12). The current supply unit 201 of the transportation 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, a step of transporting the rotating machine 100 is executed (step S13). The performer drives a truck to transport the rotating machine 100 to a destination. During transportation, the transport protection device 110 supplies current to the magnetic actuators 31a and 32a to generate magnetic attractive forces F11 and F12.

[0095] Current does not have to be supplied to the magnetic actuators 31a, 32a all the time during the process of transporting the rotating machine 100. For example, current supply may be started while the truck is moving. For example, current supply may be started and stopped multiple times while the truck is moving.

[0096] Next, in the method for transporting the rotating machine 100, a step of unloading the rotating machine 100 from the transport machine is executed (step S14). After arriving at the destination, the performer unloads the rotating machine 100 from the loading platform. Thereafter, the rotating machine 100 is installed at a predetermined installation location.

[0097] [Operation and effect of the method for transporting the rotary machine 100 according to the ninth embodiment] In this method for transporting the rotating machine 100, by passing a current through the magnetic actuators 31a, 32a during transportation of the rotating machine 100, magnetic attractive forces F11, F12 are generated from the rotating shaft 20 toward the lower bearing surfaces of the protective bearings 35, 36, thereby holding the rotating shaft 20. This makes it possible to suppress relative movement of the rotating shaft 20 with respect to the protective bearings 35, 36 during transportation. As a result, it is possible to prevent damage to the rotating shaft 20, the bearings 31-34, and the protective bearings 35, 36 during transportation. In the transportation method of this aspect, it is not necessary to provide permanent magnets to suppress relative movement of the rotating shaft 20 with respect to the bearings, and it is possible to avoid an increase in the size of the device.

[0098] In the method for transporting the rotating machine 100 of this aspect, the magnetic actuators 31a, 32a may be cooled in the step of transporting the rotating machine 100. By cooling the magnetic actuators 31a, 32a during transportation of the rotating machine 100, heat generation in the magnetic actuators 31a, 32a can be suppressed. According to the transportation method of this aspect, damage to the magnetic actuators 31a, 32a due to heat 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, 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 the transport machine. However, by passing current through the magnetic actuators 31a and 32a, the rotating shaft 20 can be held in place. This prevents damage to the rotating shaft 20, the bearings 31 to 34, and the protective bearings 35 and 36 when loading the rotating machine 100 onto the transport machine. Note that 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 the transport machine. However, by passing current through the magnetic actuators 31a and 32a, the rotating shaft 20 can be held. This prevents damage to the rotating shaft 20, the bearings 31 to 34, and the protective bearings 35 and 36 when the rotating machine 100 is unloaded from the transport machine. Note that 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 tenth embodiment] Next, a transportation protection device 110 according to a tenth embodiment will be described. Fig. 12 is a side view showing a rotating machine 100, a transportation protection device 110, and a transportation machine 120 according to the tenth embodiment. The transportation protection device 110 according to the tenth embodiment may be the same as the transportation protection device 110 according to the first embodiment. In the description of the transportation protection device 110 according to the tenth embodiment, descriptions similar to those of the transportation protection device 110 according to the above embodiments will be omitted.

[0102] 12, the rotating machine 100 is transported while being loaded onto a bed 120a of a transport machine 120. The transport machine 120 may be, for example, a truck. The transport machine 120 may also be another vehicle (automobile, train), a ship, an airplane, or a rocket.

[0103] The power source 111 may be a power source for the transport machine 120. The transport machine 120 may include an internal combustion engine, a generator, and a battery. The power source 111 may be a battery that stores electricity generated by a generator installed in 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 in the rotating machine 100 that controls the operation of the rotating machine 100. When the rotating machine 100 is in operation, the controller 200 may control the rotation speed of an 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 eleventh embodiment] Next, a transportation protection device 110 according to an eleventh embodiment will be described. Fig. 13 is a side view showing a refrigeration device 300 and a transportation machine 120 according to the eleventh embodiment. The transportation protection device 110 according to the eleventh embodiment may be the same as the transportation protection device 110 according to the first embodiment. In the description of the transportation protection device 110 according to the eleventh embodiment, descriptions similar to those of the transportation protection device 110 according to the above embodiments will be omitted.

[0106] The refrigeration system 300 may include a transportation protection device 110. The refrigeration system 300 includes a rotary machine 100, a condenser 320, and an evaporator 340. The rotary machine 100 may be a turbo compressor that compresses a refrigerant. The condenser 320 condenses the refrigerant gas compressed by the rotary machine 100. The 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 by the evaporator 340 is drawn into the rotary machine 100.

[0107] The evaporator 340 may be disposed above the condenser 320. The rotary machine 100 may be disposed above the evaporator 340.

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

[0109] During transportation of the refrigeration device 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 twelfth embodiment] Next, a transportation protection device 110 according to a twelfth embodiment will be described. Fig. 14 is a side view showing a rotating machine 100, a transportation protection device 110, and a transportation machine 120 according to the twelfth embodiment. The transportation protection device 110 according to the twelfth embodiment may be the same as the transportation protection device 110 according to the first embodiment. In the description of the transportation protection device 110 according to the twelfth embodiment, descriptions similar to those of the transportation protection device 110 according to the above embodiments will be omitted.

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

[0112] The controller 200 includes a terminal block 200a on which a plurality of terminals are arranged. Wires 200b and 200c are connected to the terminal block 200a. Connectors are connected to the wires 200b and 200c, and the connectors are inserted into the terminal block 200a. The wire 200b is connected to the coils of the magnetic actuators 31a and 32a of the bearing device 30. The wire 200c is connected to a power source 111. Current output from the power source 111 is supplied to the coils of the magnetic actuators 31a and 32a via the controller 200. During transportation, the transportation protection device 110 generates magnetic attractive forces F11 and F12 by supplying current to the magnetic actuators 31a and 32a.

[0113] [Refrigeration device 300 according to thirteenth embodiment] Next, a refrigeration system 300 according to a thirteenth embodiment will be described. Fig. 15 is a schematic diagram showing the refrigeration system 300 according to the thirteenth embodiment. The refrigeration system 300 may include a rotating machine 100 and a transportation protection device 110. Note that in the description of the thirteenth embodiment, descriptions similar to those of the above embodiments will be omitted.

[0114] The refrigeration device 300 shown in FIG. 15 is used in, for example, air conditioners, refrigeration equipment, and refrigerators. The refrigeration device 300 may also be used in other devices. The refrigeration device 300 executes a refrigeration cycle. The refrigeration cycle of the refrigeration device 300 is a vapor compression refrigeration cycle. The refrigeration device 300 includes a rotary machine 100 that is a turbo compressor, a condenser 320, an expansion valve 330, and an evaporator 340. The refrigeration device 300 may also be a refrigerator. The rotary machine 100 that is a turbo compressor includes an impeller 10 connected to a rotary shaft 20. The impeller 10 is an example of a compression mechanism.

[0115] The refrigerant serving as the working fluid of the refrigeration device 300 is not particularly limited. The rotary machine 100 compresses refrigerant gas. The condenser 320 condenses the refrigerant gas compressed by the rotary 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 by the evaporator 340 is drawn into the rotary machine 100.

[0116] The rotary machine 100 performs reversible adiabatic compression of 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 device 300 includes pipes L301 to L304 through which a refrigerant flows. The pipe L301 is a suction pipe that connects the evaporator 340 and the rotary machine 100. The pipe L302 connects the rotary machine 100 and the condenser 320. The pipe L303 connects the condenser 320 and the expansion valve 330. The pipe L304 connects the expansion valve 330 and the evaporator 340.

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

[0119] The refrigeration device 300 includes an inverter 380. The inverter 380 controls the rotation speed of the motor 40. The inverter 280 is a controller that controls the operating frequency of the motor 40. The inverter 380 controls the operating frequency of the motor 40, thereby changing the rotation speed of the impeller 10 and the rotary shaft 20.

[0120] The refrigeration device 300 includes a control unit 350. The control unit 350 includes a CPU and a storage unit. The CPU (Center Processing Unit) controls overall processing in the refrigeration device 300. The CPU can control the rotation speed of the motor 40 via the inverter 380. The CPU can control the opening and closing operation of the expansion valve 330. The control unit 350 can control the position of the rotating shaft 20 by controlling magnetic actuators (radial magnetic bearings, thrust magnetic bearings) when the refrigeration device 300 is in operation. The control unit 350 may be the controller 200 of the transportation protection device 110. The control unit 350 of the refrigeration device 300 may execute control in the transportation protection device 110. The refrigeration device 300 may include the controller 200 of the transportation protection device 110 in addition to the control unit 350.

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

[0122] [Rotating machine unit according to the embodiment] The rotating machine unit includes a rotating machine 100 having a transportation protection device 110, a rotating shaft 20, protective bearings 35, 36 that can contact the rotating shaft 20 and support the rotating shaft 20, magnetic actuators 31a, 32a that can support the rotating shaft 20 without contact by generating a magnetic attraction force that moves the rotating shaft 20 away from the protective bearings 35, 36, and 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 transportation protection device 110. The rotating machine 100 includes the rotating shaft 20, the protection bearings 35 and 36, the bearing device 30, and the 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 transportation protection device 110 may be utilized during normal operation after transportation.

[0125] The rotating machine 100 is not limited to a turbo compressor, but may be a rotary compressor or other compressor. The rotating machine 100 is not limited to a compressor, but may be a pump, a fan, a power generator, a motor, or other 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 transportation 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 transportation 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 the rotating shaft 20. The impeller 10 rotates by 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 transportation protection device 110 can be utilized during normal operation after transportation.

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

[0128] [Regarding the given values] As described above, the control unit 210 can apply a force exceeding a predetermined value to the rotating shaft 20. FIG. 16 is a diagram showing the force acting on the rotating body 82 placed on the transporting body 81. The predetermined value is set so that the contact state between the rotating body 82 and the transporting body 81 can be maintained even when subjected to an impact (acceleration A) expected during transportation. Here, as shown in FIG. 16, an electromagnetic force F is applied vertically downward to consider the electromagnetic force F required to maintain the contact state between the rotating body 82 and the transporting body 81. The contact state between the rotating body 82 and the transporting body 81 may be the contact state between the rotating shaft 20 and the protective bearings 35, 36. The electromagnetic force F may be a magnetic attraction force F11.

[0129] In examining the necessary electromagnetic force F, a balance equation (the following formula (1)) for the rotor 82 is established based on the following prerequisites (1) to (4). Precondition (1): The rotating body 82 is placed on the protective bearings 35, 36 and is not fixed to the protective bearings 35, 36. Precondition (2): The casing 50 , the magnetic bearing (bearing device 30 ) and the protective bearings 35 , 36 are fixed to the transport body 81 . Precondition (3): For simplicity, it is assumed that the protective bearings 35 and 36 and the magnetic bearing are arranged at the center of gravity of the rotor 82. Prerequisite (4): Vertical downward direction is positive.

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

[0131] The value of acceleration A of the transport body 81 during transportation 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 are assumed by referring to JIS or ASHRAE. It is preferable to determine acceleration A by actual measurement.

[0132] The user can calculate the required electromagnetic force F by adding a margin by multiplying the calculation result of the balance equation by a predetermined magnification. The predetermined magnification is preferably, for example, within 3 times. If the predetermined magnification is within 3 times, power consumption and heat generation can be suppressed.

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

[0134] [Balance equation] The balance equation (1) about the center of gravity in the rotating coordinate system is as follows: This equation (1) is the balance equation (1) of forces when the rotating body 82 is stationary relative to the transporter 81. F+mg-N-mA=0 (1) “F” in equation (1) is the electromagnetic force acting on the rotor 82. “m” is the mass of the rotating body 82; "mg" is the gravity acting on the rotating body 82. "N" is the normal force acting on the rotor 82. "mA" is the inertial force acting on the rotating body 82. The direction of the inertial force mA is random.

[0135] Here, we will find the electromagnetic force F required to prevent the rotor 82 from floating relative to the transporter 81. The condition for the rotor 82 not to float relative to the transporter 81 satisfies the following formula (2). N>0 (2)

[0136] By substituting equation (2) into the above balance equation (1), the following equations (3) to (5) are obtained. F + mg - mA = N > 0 (3) F + m(gA)>0 (4) F>m(Ag) (5)

[0137] If the electromagnetic force F satisfies the above formula (5), the rotating body 82 does not float relative to the transporting body 81.

[0138] Here, the range of the impact (acceleration A) applied to the transporter 81 is estimated. During transportation, impacts of up to 10G are applied in random directions. Therefore, the following inequality (6) holds true. -10g <A<10g···(6)

[0139] Assuming the maximum value of acceleration A with reference to ASHRAE, the value of acceleration A under the worst conditions during transportation is about 10 G, so the electromagnetic force F required to prevent the rotating body 82 from floating above the transport body is calculated to be 9 times its own weight, as shown in the following equation (7). F>m(10g-g)=9mg (7)

[0140] The preferred embodiments of the present invention have been described above in detail. However, the present invention is not limited to the above-described embodiments. Various modifications, substitutions, etc. may be applied to the above-described embodiments without departing from the scope of the present invention. Furthermore, features described separately may be combined unless technical contradictions arise.

[0141] In the above embodiment, the refrigeration device 300 including the rotary machine 100 is illustrated, but the rotary machine 100 can be applied to applications other than the refrigeration device 300. The internal fluid of the rotary machine 100 is not limited to a refrigerant.

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

[0143] <1> A transportation protection device (110) for a rotary machine (100) includes a rotating body (20), bearings (35, 36) capable of supporting the rotating body by contacting the rotating body, and magnetic actuators (31 a, 32 a) capable of supporting the rotating body without contact by generating a magnetic attraction force that moves the rotating body away from the bearings, and the transportation protection device (110) for a rotary machine (100) is housed in a casing (50), a current supply unit (201) that supplies current to the magnetic actuator during transportation of the rotating machine, thereby generating magnetic attraction forces (F11, F12) from the rotating body toward the bearing; 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> The transport protection device according to claim 1. <3> 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> The transport protection device according to claim 1. <4> an acceleration sensor attached to the casing and configured to detect acceleration of the casing; The control unit controls the current supply unit based on the detection result of the acceleration sensor. <1> ~ <3> 10. A transport protection device according to any one of the preceding claims. <5> The magnetic attraction force includes a component directed downward in the vertical direction. <1> ~ <4> 10. A transport protection device according to any one of the preceding claims. <6> The magnetic attraction force includes a horizontal component. <1> ~ <4> 10. A transport protection device according to any one of the preceding claims. <7> A transportation protection device (110) for a rotary machine (100) includes a rotating body (20), bearings (35, 36) capable of supporting the rotating body by contacting the rotating body, and magnetic actuators (31 a, 32 a) capable of supporting the rotating body without contact by generating a magnetic attraction force that moves the rotating body away from the bearings, and the transportation protection device (110) for a rotary machine (100) is housed in a casing (50), the magnetic actuator has a first coil (33a) and a second coil (34a); a current supply unit (201) that generates a first magnetic attraction force (F21) in a first direction (X1 direction) that is one horizontal direction by supplying a current to the first coil during transportation of the rotating machine, and that generates a second magnetic attraction force (F22) in a second direction (X2 direction) that is a direction opposite to the first direction in the horizontal direction by supplying a current to the second coil; a gap sensor (71) for detecting the length of a gap between the rotating body and the bearing in the horizontal direction; and a control unit (210) 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 with each other in the horizontal direction. <8> The magnetic actuator comprises two or more coils (33a, 34a), The current supply unit generates a magnetic attraction force by supplying current to a number of the coils that is less than the number of the coils during the transportation. <1> ~ <7> 10. A transport protection device according to any one of the preceding claims. <9> The transportation protection device is configured separately from the rotating machine. <1> ~ <8> 10. A transport protection device according to any one of the preceding claims. <10> The above <1> ~ <8> a transport protection device (110) according to any one of the above; A rotating body (20), bearings (35, 36) that are in contact with the rotating body and can support the rotating body; a magnetic actuator (31a, 32a) capable of supporting the rotating body in a non-contact manner by generating a magnetic attraction force that moves the rotating body away from the bearing; a rotary machine (100) having a casing (50) that houses the rotating body, the bearing, and the magnetic actuator; Rotating machine unit. <11> The above <1> ~ <8> a transport protection device (110) according to any one of the above; The rotary machine (100); a compression mechanism (10) driven by the rotor (20), Compressor unit. <12> The above <1> ~ <8> a transport protection device (110) according to any one of the above; The rotary machine (100); a refrigerant circuit including a compression mechanism (10) driven by the rotor, an evaporator (340), and a condenser (320). Refrigeration device (300). <13> A method for transporting a rotating machine, the method comprising: storing 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 contacting the rotating body by generating a magnetic attractive force that moves the rotating body away from the bearing, in a casing; a first step of loading the rotary machine onto a transport machine (120); a second step of transporting the rotating machine by the transportation machine while supplying a current to the magnetic actuator; a third step of unloading the rotating machine from the transportation machine. <14> In the second step, the magnetic actuator is cooled. <13> A method for transporting a rotating machine according to claim 1. <15> In the first step, the rotating machine is loaded onto the transportation machine while supplying a current to the magnetic actuator; In the third step, the rotating machine is lowered from the transportation machine while supplying a current to the magnetic actuator. <13> or <14> A method for transporting a rotating machine according to claim 1. [Explanation of symbols]

[0144] 100 Rotating Machinery 110 ,110C~110H transport protection device 10 Impeller (compression mechanism) 20 Rotation axis (rotating body) 30 Bearing device 31a, 32a Magnetic actuator 33a Magnetic actuator (first coil) 34a Magnetic actuator (second coil) 35,36 Protective bearing (bearing) 50 casing 71 ,73~76 Gap Sensor 77 Acceleration Sensor 81 Transporters 82 Rotating body 120 Transport machinery 200 Controller 201 Current supply section 210 Control Unit 300 Refrigeration Equipment 320 Condenser 340 Evaporator 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 transportation protection device (110) for a rotating machine (100) that includes a rotating body (20), bearings (35, 36) that can support the rotating body by contacting the rotating body, and magnetic actuators (31 a, 32 a) that can support the rotating body without contact by generating a magnetic attraction force that moves the rotating body away from the bearings, and is housed in a casing (50), a current supply unit (201) that supplies current to the magnetic actuator during transportation of the rotating machine to generate magnetic attraction forces (F11, F12) from the rotating body toward the bearing; A control unit (210) that controls the current supply unit.

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

4. an acceleration sensor attached to the casing and configured to detect acceleration of the casing; The transportation protection device according to claim 1 , wherein the control unit controls the current supply unit based on a detection result of the acceleration sensor.

5. 5. The transport protection device according to claim 1, wherein the magnetic attraction force includes a component directed downward in the vertical direction.

6. 5. The transport protection device according to claim 1, wherein the magnetic attraction force includes a horizontal component.

7. A transportation protection device (110) for a rotating machine (100) that includes a rotating body (20), bearings (35, 36) that can support the rotating body by contacting the rotating body, and magnetic actuators (31 a, 32 a) that can support the rotating body without contact by generating a magnetic attraction force that moves the rotating body away from the bearings, and is housed in a casing (50), The magnetic actuator has a first coil (33a) and a second coil (34a), a current supply unit (201) that, during transportation of the rotating machine, generates a first magnetic attraction force (F21) in a first direction (X1 direction) that is one horizontal direction by supplying a current to the first coil, and generates a second magnetic attraction force (F22) in a second direction (X2 direction) that is a direction opposite to the first direction in the horizontal direction by supplying a current to the second coil; a gap sensor (71) for detecting the length of a gap between the rotating body and the bearing in the horizontal direction; A transportation protection device comprising: a control unit (210) 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 with each other in the horizontal direction.

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

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

10. A transport protection device (110) according to claim 1 or 7; A rotating body (20), bearings (35, 36) that are in contact with the rotating body and can support the rotating body; a magnetic actuator (31 a, 32 a) capable of supporting the rotating body in a non-contact manner by generating a magnetic attraction force that moves the rotating body away from the bearing; a rotary machine (100) having a casing (50) that houses the rotating body, the bearing, and the magnetic actuator; Rotating mechanical unit.

11. A transport protection device (110) according to claim 1 or 7; The rotary machine (100); and 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 rotary machine (100); The compressor includes a refrigerant circuit having a compression mechanism (10) driven by the rotor, an evaporator (340), and a condenser (320). A refrigeration device (300).

13. A method for transporting a rotating machine, the method comprising: storing 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 contacting the rotating body by generating a magnetic attractive force that moves the rotating body away from the bearing, in a casing; a first step of loading the rotary machine onto a transport machine (120); a second step of transporting the rotating machine by the transportation machine while supplying a current to the magnetic actuator; a third step of unloading the rotating machine from the transportation machine.

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

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

Images