CN116104771B

CN116104771B - Magnetic suspension fluid conveying device

Info

Publication number: CN116104771B
Application number: CN202310374535.4A
Authority: CN
Inventors: 李永胜; 张婕妤; 孙洪洋; 李致宇; 郑伟; 邹勇强; 刘志安; 陈荣荣
Original assignee: Shandong Tianrui Heavy Industry Co Ltd
Current assignee: Shandong Tianrui Heavy Industry Co Ltd
Priority date: 2023-04-10
Filing date: 2023-04-10
Publication date: 2023-07-28
Anticipated expiration: 2043-04-10
Also published as: CN116104771A

Abstract

The invention discloses a magnetic suspension fluid conveying device, which relates to the field of energy source conveying and comprises a magnetic suspension driving mechanism and a conveying executing mechanism, wherein the magnetic suspension driving mechanism is used for driving the conveying executing mechanism to convey fluid, and comprises a magnetic suspension driving part and a transmission part, and the magnetic suspension driving part is in transmission connection with the conveying executing mechanism through the transmission part; the magnetic suspension driving part and the transmission part are connected through a first heat insulation connecting structure, and heat conduction between the magnetic suspension driving part and the transmission part is isolated. So, the steam that makes transport actuating mechanism during operation produce can not follow drive portion flow direction magnetic suspension drive portion to guarantee that magnetic suspension drive portion can normally work and not influenced by high temperature gas, can not cause transport actuating mechanism heat loss again simultaneously, and then guarantee magnetic suspension fluid conveyor's work efficiency, extension magnetic suspension fluid conveyor's life.

Description

Magnetic suspension fluid conveying device

Technical Field

The invention relates to the field of energy source conveying, in particular to a magnetic suspension fluid conveying device.

Background

Magnetic suspension fluid conveying devices such as molten salt pumps are important equipment of molten salt energy storage systems and are mainly used for conveying molten salt. The existing molten salt pump rotor adopts traditional bearing to support, and molten salt pump can flow upwards along the space around the pivot at the course of the work, and heat can also be along the ascending conduction of pivot simultaneously, can lead to bearing lubrication failure from this, aggravate bearing wearing and tearing, in addition, can lead to the motor to work under high temperature environment after the heat gets into the motor chamber, can destroy motor coil's insulating layer from this, leads to the motor to damage.

Disclosure of Invention

In order to solve the technical problems, the invention provides a magnetic suspension fluid conveying device.

The invention provides a magnetic suspension fluid conveying device, which comprises a magnetic suspension driving mechanism and a conveying executing mechanism, wherein the magnetic suspension driving mechanism is used for driving the conveying executing mechanism to convey fluid, the magnetic suspension driving mechanism comprises a magnetic suspension driving part and a transmission part, the magnetic suspension driving part is in transmission connection with the conveying executing mechanism through the transmission part, the magnetic suspension driving part comprises a rotor shaft, the transmission part comprises a transmission shaft, and the rotor shaft and the transmission shaft are coaxially arranged;

a first heat insulation connecting structure is arranged between the rotor shaft and the transmission shaft and is used for connecting the rotor shaft with the transmission shaft and isolating heat conduction between the rotor shaft and the transmission shaft;

the magnetic suspension fluid conveying device further comprises a heat dissipation structure for dissipating heat of the magnetic suspension driving part, and the heat dissipation structure is arranged at one end, close to the first heat insulation connection structure, of the rotor shaft; or alternatively, the process may be performed,

the heat dissipation structure is arranged on the first heat insulation connecting structure.

In some embodiments of the present invention, the first heat insulation connection structure includes a heat insulation pad, a heat insulation sleeve, and a connection sleeve, where the heat insulation pad is disposed between an end surface of the rotor shaft and an end surface of the transmission shaft, the connection sleeve is sleeved on the peripheral walls of the rotor shaft, the heat insulation pad, and the transmission shaft, the connection sleeve is connected with the rotor shaft and the transmission shaft through connection pieces, and the heat insulation sleeve is disposed between the connection sleeve and the rotor shaft and the transmission shaft.

In some embodiments of the invention, a heat insulation sleeve is sleeved on the peripheral wall of the connecting piece; and/or the number of the groups of groups,

the heat insulation pad and the heat insulation sleeve are of an integrated structure.

In some embodiments of the present invention, the magnetic levitation driving part further includes:

a motor housing;

the stator is arranged on the motor shell and sleeved on the rotor shaft;

the two groups of radial magnetic suspension bearings are arranged on the motor shell and are respectively positioned on two axial sides of the stator;

the thrust disc is arranged on the rotor shaft and is positioned at one end, far away from the transmission shaft, of the rotor shaft;

the two groups of axial magnetic suspension bearings are arranged on the motor shell and are positioned on two axial sides of the thrust disc;

and the two groups of protection bearings are arranged on the motor casing, each group of protection bearings corresponds to one group of radial magnetic suspension bearings, and each group of protection bearings is respectively positioned on one side, away from the stator, of the corresponding radial magnetic suspension bearing.

In some embodiments of the present invention, the transmission part further includes a connection housing for connecting the motor housing of the magnetic levitation driving part and the pump housing of the transport actuator, and the first heat insulation connection structure, the heat dissipation structure, and the transmission shaft are located inside the connection housing.

In some embodiments of the present invention, the heat dissipation structure includes a blade, an air inlet hole is disposed on the motor casing, an air vent hole is disposed on the motor casing near the connection casing, an air outlet hole is disposed on the connection casing, the air inlet hole, the air vent hole and the air outlet hole are mutually communicated to form an air ventilation channel, and the rotor shaft drives the blade to rotate to drive an air flow to flow along the air ventilation channel, so that heat generated by the magnetic suspension driving part is discharged.

In some embodiments of the invention, the magnetic levitation fluid delivery device further comprises a second heat insulating structure comprising at least one heat insulating slot provided on the connection housing and at least one heat insulating member provided on the transmission shaft, the heat insulating slot cooperating with the heat insulating member to insulate the flow of hot gas inside the pump housing along the transmission shaft to the rotor shaft.

The beneficial effects are that: the invention provides a magnetic suspension fluid conveying device which comprises a magnetic suspension driving mechanism and a conveying executing mechanism, wherein the magnetic suspension driving mechanism is used for driving the conveying executing mechanism to convey fluid, the magnetic suspension driving mechanism comprises a magnetic suspension driving part and a transmission part, and the magnetic suspension driving part is in transmission connection with the conveying executing mechanism through the transmission part. By arranging the first heat insulation connecting structure between the magnetic suspension driving part and the transmission part, the magnetic suspension driving part and the transmission part can be connected, and meanwhile, heat conduction between the magnetic suspension driving part and the transmission part can be isolated. Therefore, the first heat insulation connection structure is arranged between the magnetic suspension driving part and the transmission part, so that hot air generated during the operation of the magnetic suspension fluid conveying device can not flow to the magnetic suspension driving part along the transmission part, the magnetic suspension driving part can be ensured to normally work without being influenced by the hot air, and meanwhile, the heat loss of the magnetic suspension fluid conveying device can not be caused, the working efficiency of the magnetic suspension fluid conveying device is further ensured, and the service life of the magnetic suspension fluid conveying device is prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a magnetic levitation fluid transport device according to an exemplary embodiment of the present invention;

fig. 2 is a schematic structural view of a magnetic levitation fluid transport device according to still another exemplary embodiment of the present invention;

fig. 3 is a schematic structural view of a first heat insulation connection structure, a heat dissipation structure, and a rotor shaft and a transmission shaft according to an exemplary embodiment of the present invention.

The figures are marked as follows:

10. a magnetic levitation fluid transport device; 100. a magnetic suspension driving mechanism; 110. a magnetic levitation driving section; 111. a rotor shaft; 112. a motor housing; 1121. an air inlet hole; 1122. a vent hole; 113. a stator; 114. radial magnetic suspension bearing; 115. a thrust plate; 116. an axial magnetic suspension bearing; 117. protecting the bearing; 120. a transmission part; 121. a transmission shaft; 122. a connection housing; 1221. an air outlet hole; 123. a receiving chamber; 130. a first thermally insulating connection structure; 131. a heat insulating mat, 132, and a heat insulating sleeve; 133. a connecting sleeve; 134. a heat insulating sleeve; 140. a connecting piece; 150. a heat dissipation structure; 160. a second insulating structure; 161. a heat insulation tank; 162. a heat insulating member; 200. a transport actuator; 210. a pump housing; 220. an impeller.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present invention based on the embodiments of the present invention.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will illustratively and implicitly understand that the embodiments described herein may be combined with other embodiments.

In the related art, a water cooling device is arranged in the molten salt pump, but a large amount of heat can be taken away by cooling water, so that the heat loss of the molten salt energy storage system is caused.

Based on the above, the invention provides the magnetic suspension fluid conveying device, and the first heat insulation connecting structure is arranged between the magnetic suspension driving part and the transmission part, so that hot air generated during the operation of the conveying execution mechanism can not flow to the magnetic suspension driving part along the transmission part, thereby ensuring that the magnetic suspension driving part can normally operate without being influenced by the hot air, and simultaneously not causing the heat loss of the conveying execution mechanism, further ensuring the working efficiency of the magnetic suspension fluid conveying device and prolonging the service life of the magnetic suspension fluid conveying device.

Referring to fig. 1 and 2, an exemplary embodiment of the present invention provides a magnetic levitation fluid transporting apparatus 10, where the magnetic levitation fluid transporting apparatus 10 includes a magnetic levitation driving mechanism 100 and a transporting actuator 200, and the magnetic levitation driving mechanism 100 is used for driving the transporting actuator 200 to transport fluid, and the magnetic levitation driving mechanism 100 includes a magnetic levitation driving part 110 and a transmission part 120, and the magnetic levitation driving part 110 is in transmission connection with the transporting actuator 200 through the transmission part 120. The first heat insulation connection structure 130 is disposed between the magnetic levitation driving part 110 and the transmission part 120, and the first heat insulation connection structure 130 is used for connecting the magnetic levitation driving part 110 and the transmission part 120 and isolating heat conduction between the magnetic levitation driving part 110 and the transmission part 120.

In this embodiment, as shown in fig. 1 and 2, the magnetic levitation fluid conveying apparatus 10 includes a magnetic levitation driving part 110, a transmission part 120 and a conveying actuator 200 sequentially disposed from top to bottom, and the magnetic levitation driving part 110 is connected with the conveying actuator 200 through the transmission part 120. The magnetic levitation fluid conveying device 10 works according to the following principle: the magnetic suspension driving part 110 drives the transmission part 120 to rotate, and further drives the conveying executing mechanism 200 to convey fluid, so that the magnetic suspension fluid conveying device 10 can work normally. In addition, the magnetic suspension bearing support technology is utilized for driving, abrasion caused by contact friction between structures inside the magnetic suspension driving part 110 is avoided, and the magnetic suspension driving part 110 can run at a high speed, so that the working reliability and the service life of the magnetic suspension fluid conveying device 10 are improved.

The first heat insulation connection structure 130 is further arranged between the magnetic suspension driving part 110 and the transmission part 120, the first heat insulation connection structure 130 can connect the magnetic suspension driving part 110 with the transmission part 120 and isolate heat conduction between the magnetic suspension driving part 110 and the transmission part 120, so that hot air generated during operation of the conveying execution mechanism 200 cannot flow to the magnetic suspension driving part 110 along the transmission part 120, normal operation of the magnetic suspension driving part 110 is guaranteed, the influence of high-temperature air is avoided, heat loss of the conveying execution mechanism 200 is avoided, the working efficiency of the magnetic suspension fluid conveying device 10 is guaranteed, and the service life of the magnetic suspension fluid conveying device 10 is prolonged.

Illustratively, the magnetic levitation fluid delivery device 10 may be a molten salt pump that delivers liquid and high temperature industrial salts, nitrates, ternary salts, etc., although the magnetic levitation fluid delivery device 10 may also deliver some high temperature corrosive liquids, high temperature hazardous fluids, etc.

In an embodiment, with continued reference to fig. 1 and 2, the magnetic levitation driving part 110 includes a rotor shaft 111, the driving part 120 includes a driving shaft 121, the rotor shaft 111 and the driving shaft 121 are coaxially disposed, and the first heat insulation connection structure 130 is disposed between the rotor shaft 111 and the driving shaft 121 to connect the rotor shaft 111 and the driving shaft 121.

In this embodiment, as shown in fig. 1 and 2, the magnetic levitation driving part 110 is provided with a rotor shaft 111, the transmission part 120 is provided with a transmission shaft 121, and the rotor shaft 111 and the transmission shaft 121 are coaxially arranged, so that the rotor shaft 111 can drive the transmission shaft 121 to rotate together when rotating. One end of the first heat insulation connection structure 130 is connected with one end of the rotor shaft 111, and the other end of the first heat insulation connection structure 130 is connected with one end, close to the rotor shaft 111, of the transmission shaft 121, so that the rotor shaft 111 can be connected with the transmission shaft 121 through the first heat insulation connection structure 130, meanwhile, hot gas generated during operation of the conveying execution mechanism 200 cannot flow upwards to the rotor shaft 111 along the transmission shaft 121, and therefore the magnetic suspension driving part 110 can normally operate without being influenced by the hot gas, heat loss of the conveying execution mechanism 200 cannot be caused, and the working reliability of the magnetic suspension fluid conveying device 10 is guaranteed.

In an embodiment, referring to fig. 3, and referring to fig. 1 and 2, the first heat insulation connection structure 130 includes a heat insulation pad 131, a heat insulation sleeve 132 and a connection sleeve 133, wherein the heat insulation pad 131 is disposed between an end surface of the rotor shaft 111 and an end surface of the transmission shaft 121, the connection sleeve 133 is sleeved on the peripheral walls of the rotor shaft 111, the heat insulation pad 131 and the transmission shaft 121, the connection sleeve 133 is connected with the rotor shaft 111 and the transmission shaft 121 through a connection member 140, and the heat insulation sleeve 132 is disposed between the connection sleeve 133 and the rotor shaft 111 and the transmission shaft 121.

In this embodiment, referring to fig. 3, and referring to fig. 1 and 2, the first heat insulation connection structure 130 for connecting the rotor shaft 111 and the transmission shaft 121 includes a heat insulation pad 131 disposed between an end surface of the rotor shaft 111 and an end surface of the transmission shaft 121, a connection sleeve 133 disposed on a peripheral wall of the rotor shaft 111, the transmission shaft 121 and the heat insulation pad 131, and a heat insulation sleeve 132 disposed between the peripheral wall of the rotor shaft 111, the heat insulation pad 131 and the transmission shaft 121 and the connection sleeve 133, wherein the connection sleeve 133 and the rotor shaft 111 are fixedly connected through a connecting piece 140, and the connection sleeve 133 and the transmission shaft 121 are fixedly connected through the connecting piece 140, so that connection of the rotor shaft 111 and the transmission shaft 121 and heat conduction between the magnetic suspension driving part 110 and the transmission part 120 are isolated, thereby ensuring that the magnetic suspension driving part 110 can normally operate without being affected by high temperature hot air, and heat loss of the conveying actuator 200 is not caused, and further ensuring working reliability of the magnetic suspension fluid conveying device 10.

Illustratively, the connection 140 may be a pin, screw, bolt, or the like fastener. And the number of the connection members 140 may be set as required, for example, in the present embodiment, referring to fig. 3, two connection members 140 are provided at intervals along the extending direction of the rotor shaft 111 and the transmission shaft 121.

Illustratively, the heat insulation pad 131 and the heat insulation sleeve 132 are made of materials with low heat conductivity, for example, the heat insulation pad 131 and the heat insulation sleeve 132 may be made of ceramics, glass fiber reinforced plastics, and the like.

Illustratively, the material of the connection sleeve 133 may be steel, an aluminum alloy, cast iron, or the like.

Illustratively, referring to FIG. 3, the insulation pad 131 is integrally formed with the insulation sleeve 132, thus simplifying installation while improving structural stability. Of course, the heat insulation pad 131 and the heat insulation sleeve 132 may be of a separate structure.

In one embodiment, with continued reference to fig. 3, a thermal insulation sleeve 134 is sleeved on the peripheral wall of the connecting member 140, and the thermal insulation sleeve 134 cooperates with the thermal insulation pad 131 and the thermal insulation sleeve 132 to insulate the heat conduction between the magnetic levitation driving part 110 and the transmission part 120.

Illustratively, the insulating sleeve 134 is also made of a material with low thermal conductivity, and the material of the insulating sleeve 134 may be ceramic, glass fiber reinforced plastic, or the like.

In one embodiment, referring to fig. 1 and 2, the magnetic levitation driving part 110 includes, in addition to the rotor shaft 111, a motor casing 112, a stator 113, two sets of radial magnetic bearings 114, a thrust disc 115, two sets of axial magnetic bearings 116, and two sets of protection bearings 117. Wherein, the stator 113 is mounted on the motor casing 112 and sleeved on the rotor shaft 111; two groups of radial magnetic suspension bearings 114 are arranged on the motor shell 112 and are respectively positioned on two axial sides of the stator 113; the thrust disc 115 is arranged on the rotor shaft 111 and is positioned at one end of the rotor shaft 111 far away from the transmission shaft 121; two groups of axial magnetic suspension bearings 116 are mounted on the motor casing 112 and are positioned on two axial sides of the thrust disc 115; two groups of protection bearings 117 are mounted on the motor casing 112, each group of protection bearings 117 corresponds to one group of radial magnetic suspension bearings 114, and each group of protection bearings 117 is located on one side, away from the stator 113, of the corresponding radial magnetic suspension bearing 114.

In this embodiment, as shown in fig. 1 and 2, the magnetic levitation driving part 110 includes a rotor shaft 111, a stator 113 sleeved on the rotor shaft 111, two sets of radial magnetic levitation bearings 114, two sets of protection bearings 117, a thrust disk 115, and two sets of axial magnetic levitation bearings 116 provided on the thrust disk 115. The magnetic field generated by the coil of the stator 113 acts on the thrust disc 115, the thrust disc 115 transmits thrust to the rotor shaft 111 and drives the rotor shaft 111 to rotate and suspend, the two groups of axial magnetic suspension bearings 116 can utilize controllable current to generate non-contact controllable electromagnetic force on the electromagnet to control the axial position of the rotor shaft 111 in the motor casing 112, so that no mechanical contact exists between the axial magnetic suspension bearings 116 and the rotor shaft 111, and further mechanical abrasion of the axial magnetic suspension bearings 116 is reduced, and the service life of the axial magnetic suspension bearings 116 is prolonged. Two sets of radial magnetic bearings 114 are used to control the radial position of rotor shaft 111 within motor housing 112. By providing the radial magnetic bearing 114 and the axial magnetic bearing 116, the rotor shaft 111 is levitated by the magnetic force, and the output efficiency of the entire magnetic levitation driving part 110 is improved while reducing mechanical wear.

Since the magnetic suspension driving portion 110 may generate a sudden failure of the magnetic suspension bearing during the working process, so as to cause a drop failure of the rotor shaft 111, when the rotor shaft 111 drops, the rotor shaft 111 may impact the structure outside the rotor shaft 111 radially and axially, that is, the rotor shaft 111 may impact the radial magnetic suspension bearing 114 radially and impact the axial magnetic suspension bearing 116 axially, thereby damaging the magnetic suspension driving portion 110, and further affecting the service life of the magnetic suspension driving portion 110. In order to protect the axial magnetic bearing 116 and the radial magnetic bearing 114, the magnetic levitation driving part 110 is further provided with two groups of protection bearings 117, and the protection bearings 117 serve as a kind of passive bearings, namely, when the axial magnetic bearing 116 and the radial magnetic bearing 114 do not work or fail for some reason, the rotor shaft 111 capable of bearing full-speed operation falls down to support the rotor shaft 111 until normal operation is restored or until safe speed reduction is achieved.

The stator 113, the two groups of radial magnetic suspension bearings 114, the two groups of protection bearings 117, the thrust disc 115 and the two groups of axial magnetic suspension bearings 116 are all sleeved on the rotor shaft 111, so that the space in the motor casing 112 is reasonably utilized, the whole structure is more compact, and the structure is stable.

Illustratively, cast iron, cast aluminum alloy, section steel, steel plate, etc. may be used as the material of the motor case 112.

For example, permanent magnets may be provided on the rotor shaft 111, and the rotor shaft 111 may be driven to rotate by generating a magnetic field using the coils of the stator 113 and acting on the permanent magnets on the rotor shaft 111. Of course, in other embodiments, the magnetic levitation driving part 110 may also adopt an asynchronous motor structure, i.e. the rotor shaft 111 is not provided with permanent magnets, but adopts a squirrel cage or winding structure. In this way, the rotor does not need to be provided with permanent magnets, and is not limited by the working temperature of the permanent magnets, so that the magnetic levitation fluid conveying device 10 can adapt to higher working temperature.

Illustratively, the stator 113 coils may be braided with mica to provide a high temperature wire that may further increase the operating temperature of the magnetic levitation fluid delivery device 10.

In an embodiment, referring to fig. 1, the magnetic levitation fluid conveying apparatus 10 further includes a heat dissipation structure 150 for dissipating heat from the magnetic levitation driving portion 110, where the heat dissipation structure 150 is disposed on the rotor shaft 111 near one end of the first heat insulation connecting structure 130.

In this embodiment, as shown in fig. 1, the magnetic levitation driving part 110 generates heat during operation, and a heat dissipation structure 150 is disposed at one end of the rotor shaft 111 near the first heat insulation connection structure 130, where the heat dissipation structure 150 can timely dissipate the heat generated by the magnetic levitation driving part 110. In this way, not only the rotor shaft 111 can be cooled, but also the heat generated when the coil of the stator 113 is operated can be taken away, thereby ensuring the operational reliability of the magnetic levitation driving part 110.

Illustratively, the heat dissipating structure 150 may be a heat dissipating fan, a heat sink, or the like.

In another embodiment, referring to fig. 2, the heat dissipating structure 150 may also be disposed on the first insulating connecting structure 130. Specifically, the heat dissipation structure 150 may be integrally formed with the first heat insulation connection structure 130; of course, the heat dissipation structure 150 and the first heat insulation connection structure 130 may be separate structures, for example, the heat dissipation structure 150 may be fixedly connected with the connection sleeve 133 of the first heat insulation connection structure 130 through a fastener. In this way, the magnetic levitation fluid conveying device 10 is more compact in structure, which is beneficial to structural stability.

In an embodiment, referring to fig. 1 and 2, the transmission part 120 further includes a connection housing 122, the connection housing 122 is used to connect the motor housing 112 of the magnetic levitation driving part 110 and the pump housing 210 of the transport actuator 200, and the first heat insulation connection structure 130, the heat dissipation structure 150 and the transmission shaft 121 are located inside the connection housing 122.

In this embodiment, as shown in fig. 1 and 2, the transmission part 120 includes, in addition to the transmission shaft 121, a connection housing 122 accommodating the transmission shaft 121, and the delivery actuator 200 includes an impeller 220 and a pump housing 210, and the connection housing 122 is used to connect the motor housing 112 of the magnetic levitation driving part 110 and the pump housing 210 of the delivery actuator 200, so that the magnetic levitation driving part 110, the transmission part 120, and the delivery actuator 200 form one magnetic levitation fluid delivery device 10. The connection housing 122 has a receiving cavity 123 therein, and the first heat insulation connection structure 130, the heat dissipation structure 150, and the transmission shaft 121 are all located in the receiving cavity 123.

Of course, in other embodiments, the first heat insulation connection structure 130 and the heat dissipation structure 150 may be accommodated in the motor casing 112, so long as the first heat insulation connection structure 130 is capable of insulating heat conduction between the magnetic levitation driving part 110 and the transmission part 120, and the heat dissipation structure 150 is capable of dissipating heat from the magnetic levitation driving part 110.

In an embodiment, referring to fig. 1 and 2, the heat dissipation structure 150 includes a blade, an air inlet 1121 is disposed on the motor casing 112, an air vent 1122 is disposed on the motor casing 112 near the connection casing 122, an air outlet 1221 is disposed on the connection casing 122, the air inlet 1121, the air vent 1122 and the air outlet 1221 are mutually communicated to form an air flow channel, and the rotor shaft 111 drives the blade to rotate to drive the air flow along the air flow channel, so as to discharge the heat generated by the magnetic levitation driving part 110.

In this embodiment, as shown in fig. 1 and 2, the heat dissipation structure 150 includes blades, and can push air to flow under the driving of the rotor shaft 111, so as to discharge the hot air flow generated when the magnetic levitation driving part 110 operates. An air inlet hole 1121 and an air vent 1122 are arranged on the motor casing 112, an air outlet hole 1221 is arranged on the connecting casing 122, wherein the air inlet hole 1121 is arranged on the motor casing 112 at a position far away from the connecting casing 122, the air vent 1122 is arranged on the motor casing 112 at a position close to the connecting casing 122, and the air outlet hole 1221 is arranged on the connecting casing 122 at a position close to the heat radiation structure 150, so that an air ventilation flow channel can be formed by the mutual communication of the air inlet hole 1121, the air vent 1122 and the air outlet hole 1221, and when the rotor shaft 111 drives the blades to rotate, hot air generated by the magnetic suspension driving part 110 can flow along the air ventilation flow channel and be discharged. Thus, by arranging the heat dissipation structure 150, not only can heat be dissipated to the rotor shaft 111, but also the heat generated during the working of the coil of the stator 113 can be taken away, and a water cooling device is not needed, so that the structure is simplified, and the heat loss of the conveying executing mechanism 200 caused by taking away more heat by cooling water can be avoided. In addition, the rotation of the blades also generates lifting force, and partial gravity of the rotor shaft 111 can be counteracted, so that the burden of the axial magnetic suspension bearing 116 is reduced, and the power consumption is reduced.

Illustratively, the positions and the number of the air inlet holes 1121, the air outlet holes 1122, and the air outlet holes 1221 may be set as needed, as long as the heat dissipation structure 150 is ensured to be able to discharge the heat generated by the magnetic levitation driving part 110.

Illustratively, the shapes of the air inlet holes 1121, the air outlet holes 1122, and the air outlet holes 1221 may be any shape, such as circular, square, or irregular, which is not limited in this embodiment.

In one embodiment, referring to fig. 1 and 2, the magnetic levitation fluid transporting device 10 further includes a second heat insulation structure 160, the second heat insulation structure 160 including at least one heat insulation groove 161 provided on the connection housing 122 and at least one heat insulation member 162 provided on the transmission shaft 121, the heat insulation groove 161 cooperating with the heat insulation member 162 to insulate hot gas inside the pump housing 210 from flowing along the transmission shaft 121 toward the rotor shaft 111.

In this embodiment, as shown in fig. 1 and 2, a second heat insulation structure 160 is further disposed in the transmission portion 120, where the second heat insulation structure 160 is formed by at least one heat insulation groove 161 and at least one heat insulation member 162 in a matching manner, the heat insulation groove 161 is formed by concave portions of inner walls of the connection shell 122, the heat insulation member 162 is fixedly disposed on the transmission shaft 121, and an outer edge of the heat insulation member 162 can extend into the heat insulation groove 161 and cooperate with the heat insulation groove 161 to make the second heat insulation structure 160 as a sealing structure, so that hot air in the pump housing 210 can be isolated from flowing upward along the transmission shaft 121, i.e. toward the rotor shaft 111, so that hot air generated during operation of the conveying actuator 200 does not flow to the magnetic suspension driving portion 110 along the pores around the transmission shaft 121, thereby ensuring that the magnetic suspension driving portion 110 can normally operate without being affected by high temperature hot air, and at the same time, heat loss of the conveying actuator 200 is not caused, thereby ensuring the working efficiency of the magnetic suspension fluid conveying device 10, and the service life of the fluid conveying device 10 is prolonged.

Illustratively, the shape of the heat insulation groove 161 and the heat insulation member 162 may be any shape, for example, referring to fig. 1 and 2, the heat insulation groove 161 is an annular groove, and the heat insulation member 162 is an annular heat insulation plate, so that the outer edge of the heat insulation member 162 may extend into the heat insulation groove 161 and be adapted to the heat insulation groove 161 to form a sealing labyrinth structure capable of insulating the hot air inside the pump casing 210 from flowing upward along the driving shaft 121. Of course, in other embodiments, the shape of the heat insulation groove 161 and the heat insulation member 162 may be irregular, as long as the heat insulation member 162 is ensured to be matched with the heat insulation groove 161.

For example, the number of the heat insulation grooves 161 and the heat insulation members 162 may be set as required, and for example, referring to fig. 1 and 2, the heat insulation grooves 161 and the heat insulation members 162 are each provided with three and one-to-one correspondence.

Illustratively, the heat shield 162 is made of a material having a low thermal conductivity, for example, the material of the heat shield 162 may be ceramic, glass fiber reinforced plastic, or the like.

In one embodiment, in order to mount the transmission shaft 121 provided with the heat insulator 162 and the connection housing 122, the connection housing 122 may be configured as a left-right split structure, and the connection housing 122 is formed by combining left and right half-shells. The connection housing 122 may be made of a material having a low thermal conductivity, such as ceramic, glass fiber reinforced plastic, etc.

The embodiments described in the present specification are merely examples of implementation forms of the inventive concept, and the scope of protection of the present invention should not be construed as being limited to the specific forms set forth in the embodiments, but the scope of protection of the present invention also includes equivalent technical means that can be conceived by those skilled in the art according to the inventive concept.

Claims

1. The magnetic suspension fluid conveying device is characterized by comprising a magnetic suspension driving mechanism and a conveying executing mechanism, wherein the magnetic suspension driving mechanism is used for driving the conveying executing mechanism to convey fluid, the magnetic suspension driving mechanism comprises a magnetic suspension driving part and a transmission part, the magnetic suspension driving part is in transmission connection with the conveying executing mechanism through the transmission part, the magnetic suspension driving part comprises a rotor shaft, the transmission part comprises a transmission shaft, and the rotor shaft and the transmission shaft are coaxially arranged;

the first heat insulation connecting structure comprises a heat insulation pad, a heat insulation sleeve and a connecting sleeve, wherein the heat insulation pad is arranged between the end face of the rotor shaft and the end face of the transmission shaft, the connecting sleeve is sleeved on the peripheral walls of the rotor shaft, the heat insulation pad and the transmission shaft, the connecting sleeve is connected with the rotor shaft and the connecting sleeve is connected with the transmission shaft through connecting pieces, and the heat insulation sleeve is arranged between the connecting sleeve and the rotor shaft and between the connecting sleeve and the transmission shaft;

a heat insulation sleeve is sleeved on the peripheral wall of the connecting piece; and/or the number of the groups of groups,

the heat insulation pad and the heat insulation sleeve are of an integrated structure;

the heat dissipation structure is arranged on the first heat insulation connecting structure;

the magnetic suspension driving part further comprises a motor shell, the transmission part further comprises a connecting shell, the heat dissipation structure comprises a blade, an air inlet hole is formed in the motor shell, an air vent hole is formed in the motor shell and close to the connecting shell, an air outlet hole is formed in the connecting shell, the air inlet hole, the air vent hole and the air outlet hole are mutually communicated to form an air ventilation flow channel, and the rotor shaft drives the blade to rotate so as to drive air flow to flow along the air ventilation flow channel, so that heat generated by the magnetic suspension driving part is discharged;

the magnetic suspension fluid conveying device further comprises a second heat insulation structure, the second heat insulation structure comprises at least one heat insulation groove arranged on the connecting shell and at least one heat insulation part arranged on the transmission shaft, and the heat insulation groove is matched with the heat insulation part to insulate hot air in the pump shell of the conveying executing mechanism from flowing along the transmission shaft.

2. The magnetic levitation fluid transport device of claim 1, wherein the magnetic levitation driving section further comprises:

the stator is arranged on the motor shell and sleeved on the rotor shaft;

3. The magnetic levitation fluid delivery device of claim 1, wherein the connection housing is configured to connect the motor housing of the magnetic levitation driving part and the pump housing of the delivery actuator, and the first heat-insulating connection structure, the heat-dissipating structure, and the transmission shaft are located inside the connection housing.