An energy-saving air suspension centrifugal fan

Abstract

The present invention discloses an energy-saving air suspension centrifugal fan, which relates to the technical field of energy-saving centrifugal pumps and includes a centrifugal fan cabinet. Inside the centrifugal fan cabinet, there is a motor body. One end of the motor body is connected to a first air inlet, and the other end of the motor body is connected to a second air inlet. The top surface of the motor body is connected to a first air outlet and a second air outlet. The motor body includes a motor housing. The bottom of the motor housing is fixedly connected to a motor base. One end of the motor housing is connected to a first air intake hood, ensuring that the air film pressure between the magnetic suspension bearing and the concave rotating block is in a stable state. In this way, the concave rotating block still rotates smoothly within a short time after the motor body is turned off and does not collide or rub against the magnetic suspension bearing. On the one hand, it ensures the smooth rotation of the motor shaft, and on the other hand, it also avoids the collision or friction of the concave rotating block, improving the protection effect on the concave rotating block and indirectly increasing the service life of the motor body.

Description

Technical Field

[0001] The present invention relates to the technical field of energy-saving centrifugal pumps, and particularly to an energy-saving air suspension centrifugal fan. Background Art

[0002] A pump is a mechanical device used to move or pressurize fluids (such as liquids, gases, or gas-liquid mixtures). Its core function is to achieve the directional transportation or pressure increase of fluids (such as liquids, gases, or gas-liquid mixtures) through energy conversion. Among them, a centrifugal fan is a special centrifugal pump used to pressurize gases. An air suspension centrifugal fan refers to a centrifugal fan using air suspension bearings, which has an energy-saving effect, that is, an energy-saving centrifugal pump. The air suspension bearings in a centrifugal fan mainly include components such as radial bearings and thrust bearings. Before starting, there is physical contact between the rotating shaft and the bearings. When starting, the rotating shaft and the bearings move relative to each other to form a hydrodynamic field. In the radial bearing, this hydrodynamic force forms a lifting force, which makes the rotating shaft in a suspended state to achieve the purpose of free rotation. This kind of bearing is different from traditional ball bearings. During operation, there is no physical contact point between the rotating shaft and the bearings, so no lubricating oil is required, the energy loss is extremely low, and the efficiency is extremely high. When applied to a centrifugal fan, the energy-saving effect is excellent;

[0003] For existing air suspension centrifugal fans, for example, a motor and an air suspension centrifugal fan applying the motor disclosed in a Chinese patent application with the publication number CN112039262A. This air suspension centrifugal fan includes a motor rotor, a thrust disc, a compressor impeller, and corresponding fasteners; when this air suspension centrifugal fan shuts down, since the rotational speed of the impeller will decrease, the amount of air entering the centrifugal fan will also decrease significantly. In this way, the air support force received by the rotating shaft will also decrease, causing mechanical friction and mechanical collision between the rotating shaft and the suspension bearings, reducing the service life of the rotating shaft and the suspension bearings. Summary of the Invention

[0004] In order to overcome the above technical problems, the purpose of the present invention is to provide an energy-saving air suspension centrifugal fan to solve the problem in the prior art that after the air suspension centrifugal fan shuts down, since the rotational speed of the impeller decreases, the amount of air entering the centrifugal fan also decreases significantly, the air support force received by the rotating shaft also decreases, resulting in mechanical friction and mechanical collision between the rotating shaft and the suspension bearings, and shortening the service life of the rotating shaft and the suspension bearings.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] Specifically, an energy-saving air suspension centrifugal fan is provided, which includes a centrifugal fan cabinet. Inside the centrifugal fan cabinet, there is a motor body. One end of the motor body is connected to a first air inlet, and the other end of the motor body is connected to a second air inlet. The top surface of the motor body is connected to a first air outlet and a second air outlet. The motor body includes a motor housing. The bottom of the motor housing is fixedly connected to a motor base. One end of the motor housing is connected to a first air intake hood, and the other end of the motor housing is connected to a second air intake hood. The second air intake hood is connected to an air delivery hood. In the middle position of the top surface of the motor housing, a voltage stabilizing mechanism is installed. On both sides of the voltage stabilizing mechanism, there are air delivery channels, and the air delivery channels are communicated with the air delivery hood. At the center position of the front surface of the motor housing, an exhaust mechanism is provided.

[0007] As a further scheme of the present invention: at the center position inside the motor housing, there is a motor rotating shaft. On the outer side surface of the motor housing near the motor rotating shaft, a stator is fixedly connected. On both sides of the stator, there is an air delivery mechanism. On the side of the air delivery mechanism away from the stator, there is a magnetic bearing.

[0008] As a further scheme of the present invention: at the middle position on the side surface of the motor rotating shaft, there is a rotor. On both sides of the motor rotating shaft near the rotor, there are nested concave rotating blocks.

[0009] As a further scheme of the present invention: the magnetic bearing includes a bearing body. Inside the bearing body, there is an internal channel. On the inner side of the bearing body, there is an inner convex supporting surface, and the inner convex supporting surface fits with the concave rotating block.

[0010] As a further scheme of the present invention: the air delivery mechanism includes an air delivery disc. On the top of the air delivery disc, there is a docking channel. Inside the air delivery disc, there is an exhaust cavity. On one side of the air delivery disc, there is a docking hole, and on the other side of the air delivery disc, there is an exhaust hole.

[0011] As a further scheme of the present invention: inside the stator, there is a winding groove. On the side surface of the stator, there is an air flow groove. At the center position on the side surface of the stator near the air flow groove, there is an external connection groove.

[0012] As a further scheme of the present invention: the exhaust mechanism includes an annular groove. The annular groove is opened at the center position of the inner cavity of the motor housing. The annular groove cooperates with the external connection groove, and one side of the annular groove is connected to an exhaust channel.

[0013] As a further scheme of the present invention: the voltage stabilizing mechanism includes a voltage stabilizing housing. On both sides of the voltage stabilizing housing, there are docking ports, and the docking ports are communicated with the air delivery channels. Inside the voltage stabilizing housing, there is a voltage stabilizing cavity, and on the inner side surface of the voltage stabilizing cavity, there is an adjusting plate.

[0014] As a further solution of the present invention: an installation frame is fixedly connected to the top surface of the voltage stabilizing mechanism, a piston cylinder is fixedly connected to the inner side of the installation frame, a gas pressure bottle is arranged on one side of the piston cylinder, a piston rod is fitted inside the piston cylinder, and one end of the piston rod is fixedly connected to the surface of the adjusting plate.

[0015] As a further solution of the present invention: one end of the motor rotating shaft is fixedly connected to a first connecting shaft, the other end of the motor rotating shaft is fixedly connected to a second connecting shaft, a first impeller is nested on the outer side of the first connecting shaft, and a second impeller is nested on the outer side of the second connecting shaft.

[0016] Advantages of the present invention:

[0017] 1. In the present invention, through the provided voltage stabilizing mechanism, when the motor body is turned off, the rotation speed of the second impeller inside the second air intake hood will inevitably decrease, so the amount of air inhaled by the second air intake hood will also inevitably decrease. Then, since the pressure at the top of the piston cylinder directly acts on the top of the piston rod, when the air pressure inside the voltage stabilizing cavity corresponding to the adjusting plate decreases, the balance of the adjusting plate will be broken, and the piston rod will directly act on the adjusting plate, causing the adjusting plate to squeeze the air inside the voltage stabilizing cavity and balance the air pressure inside the voltage stabilizing cavity, ensuring that the air film pressure between the suspension bearing and the concave rotating block is in a stable state. In this way, the concave rotating block still rotates smoothly within a short time after the motor body is turned off and does not collide or rub with the suspension bearing. On the one hand, it ensures the smooth rotation of the motor rotating shaft, and on the other hand, it also avoids the concave rotating block from colliding or rubbing, improving the protection effect on the concave rotating block and indirectly increasing the service time of the motor body.

[0018] 2. In the present invention, since the inner convex supporting surface fits with the concave rotating block, the air discharged from the circular holes opened on the surface of the inner convex supporting surface will act on the concave rotating block evenly. And the surface of the concave rotating block is concave, so the concave rotating block will be subjected to a uniform radial force, making the concave rotating block stable inside the suspension bearing. And the concave rotating block is fixedly connected to the motor rotating shaft, so the motor rotating shaft will also be stable inside the suspension bearing, making the motor rotating shaft drive the first impeller to rotate at a high speed more smoothly. Description of the drawings

[0019] The following further describes the present invention with reference to the drawings.

[0020] Figure 1 is a schematic structural diagram of the motor of the present invention;

[0021] Figure 2 is a cross-sectional view of the motor of the present invention;

[0022] Figure 3 is a schematic structural diagram of the voltage stabilizing mechanism in the motor of the present invention;

[0023] Figure 4 It is a cross-sectional view of the voltage stabilizing mechanism in the motor of the present invention;

[0024] Figure 5 It is a schematic structural view of the motor shaft in the motor of the present invention;

[0025] Figure 6 It is a schematic structural view of the air delivery mechanism in the motor of the present invention;

[0026] Figure 7 It is a schematic structural view of the magnetic suspension bearing in the motor of the present invention;

[0027] Figure 8 It is a schematic internal structural view of the exhaust mechanism in the present invention;

[0028] Figure 9 It is a schematic structural view of the stator in the present invention;

[0029] Figure 10 It is a schematic structural view of the first impeller and the second impeller in the present invention;

[0030] Figure 11 It is a schematic structural view of an air suspension centrifugal fan in the present invention;

[0031] Figure 12 It is a front view of an air suspension centrifugal fan in the present invention.

[0032] Reference numerals: 1, centrifugal fan cabinet; 2, motor body; 21, motor housing; 211, motor shaft; 2111, rotor; 2112, concave rotating block; 2113, first connecting shaft; 2114, second connecting shaft; 2115, first impeller; 2116, second impeller; 212, stator; 2121, winding hoop groove; 2122, air flow groove; 2123, external connection groove; 213, air delivery mechanism; 2131, air delivery disc; 2132, docking channel; 2133, docking hole; 2134, exhaust cavity; 2135, exhaust hole; 214, magnetic suspension bearing; 2141, bearing body; 2142, internal channel; 2143, inner convex supporting surface; 22, motor base; 23, first air inlet hood; 24, second air inlet hood; 25, air delivery hood; 26, air delivery channel; 27, voltage stabilizing mechanism; 271, voltage stabilizing housing; 272, docking port; 273, voltage stabilizing cavity; 274, mounting frame; 275, piston cylinder; 276, pressure bottle; 277, mounting plate; 278, piston rod; 279, adjusting plate; 28, exhaust mechanism; 281, circular ring groove; 282, exhaust channel; 3, first air inlet; 4, first air outlet; 5, second air inlet; 6, second air outlet. Detailed implementation manners

[0033] 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 is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] As an embodiment of the present invention, as Figures 1-12 shown, the present invention discloses an energy-saving air suspension centrifugal fan, which includes a centrifugal fan cabinet 1. An electric motor body 2 is arranged inside the centrifugal fan cabinet 1. One end of the electric motor body 2 is connected to a first air inlet 3, and the other end of the electric motor body 2 is connected to a second air inlet 5. The top surface of the electric motor body 2 is connected to a first air outlet 4 and a second air outlet 6. It should be noted that the electric motor body 2 is fixedly connected to the inner surface of the centrifugal fan cabinet 1 by bolts through a motor base 22. One end of a first air inlet hood 23 away from the electric motor body 2 is fixedly connected to the first air inlet 3. Thus, when a first impeller 2115 inside the first air inlet hood 23 rotates at a high speed, the first impeller 2115 will generate suction force on the first air inlet hood 23. After the first air inlet hood 23 is connected to the first air inlet 3, the first air inlet hood 23 can suck air in the external environment through the first air inlet 3. A filter membrane or filter cotton can be installed inside the first air inlet 3 to ensure that the air in the external environment sucked by the first air inlet 3 is free of dust. A filter membrane or filter cotton can also be installed inside the second air inlet 5 to remove the dust of the air entering the second air inlet hood 24;

[0035] After the first air inlet hood 23 sucks air, it is then transported to the first air outlet 4. After the second air inlet hood 24 sucks air, it is then transported to the second air outlet 6;

[0036] The motor body 2 includes a motor housing 21. A motor base 22 is fixedly connected to the bottom of the motor housing 21. One end of the motor housing 21 is connected to a first air inlet hood 23, and the other end of the motor housing 21 is connected to a second air inlet hood 24. The second air inlet hood 24 is connected to an air delivery hood 25. A voltage stabilizing mechanism 27 is installed at the middle position of the top surface of the motor housing 21. Air delivery channels 26 are arranged on both sides of the voltage stabilizing mechanism 27. The air delivery channels 26 communicate with the air delivery hood 25. An exhaust mechanism 28 is arranged at the center position of the front surface of the motor housing 21. It should be noted that a channel for entering the first air inlet hood 23 is opened at one end of the first air inlet hood 23 away from the motor housing 21. One side of the first air inlet hood 23 is fixedly connected to the second air inlet hood 24. When the motor body 2 is turned on, the first air inlet hood 23 can suck in air to generate wind power, and the second air inlet hood 24 is used to suck in air for air-cooling the interior of the motor body 2. The voltage stabilizing mechanism 27 installed on the top surface of the motor housing 21 can stabilize the air pressure between the motor shaft 211 and the magnetic suspension bearing 214 inside the motor housing 21, making the rotation of the motor shaft 211 more stable and preventing eccentric rotation.

[0037] As an embodiment of the present invention, as Figures 1-10 shown, a motor shaft 211 is arranged at the center position inside the motor housing 21. A stator 212 is fixedly connected to the outer side surface of the motor housing 21 close to the motor shaft 211. Air delivery mechanisms 213 are arranged on both sides of the stator 212. Magnetic suspension bearings 214 are arranged on the sides of the air delivery mechanisms 213 away from the stator 212. It should be noted that a first connecting shaft 2113 and a second connecting shaft 2114 are respectively fixedly connected to both ends of the motor shaft 211. A first impeller 2115 is nested on the outer side of the first connecting shaft 2113, and a second impeller 2116 is nested on the outer side of the second connecting shaft 2114. The first impeller 2115 fits with the first air inlet hood 23, and the second impeller 2116 fits with the second air inlet hood 24. When the motor shaft 211 rotates, the motor shaft 211 will drive the first impeller 2115 and the second impeller 2116 to rotate respectively through the first connecting shaft 2113 and the second connecting shaft 2114. Since the first impeller 2115 fits with the first air inlet hood 23, the rotating first impeller 2115 will generate suction in the first air inlet hood 23 to suck in air from the external environment. The same is true for the second impeller 2116. The rotating second impeller 2116 will generate suction in the second air inlet hood 24 to suck in air from the external environment. The second air inlet hood 24 can deliver the sucked air to the magnetic suspension bearing 214 to enable the magnetic suspension bearing 214 to achieve the air suspension function, greatly reducing the friction and wear of the motor shaft 211, and enabling the motor shaft 211 to rotate stably and at high speed inside the magnetic suspension bearing 214.

[0038] As an embodiment of the present invention, as Figures 1-9As shown in the figure, a rotor 2111 is provided at the middle position on the side of the motor shaft 211. Concave rotating blocks 2112 are nested at both sides of the motor shaft 211 close to the rotor 2111 on the side. It should be noted that the second air inlet cover 24 can deliver air to the magnetic bearing 214, so that an air film is formed between the magnetic bearing 214 and the concave rotating blocks 2112. The air film supports the load of the concave rotating blocks 2112, enabling the magnetic bearing 214 and the concave rotating blocks 2112 to rotate through the air medium, greatly reducing the friction and wear of the concave rotating blocks 2112, and enabling the concave rotating blocks 2112 to rotate stably and at high speed inside the magnetic bearing 214. Additionally, it should be noted that the concave rotating blocks 2112 and the magnetic bearing 214 fit each other, and there is still a gap between the concave rotating blocks 2112 and the magnetic bearing 214. The gap allows the air delivered by the second air inlet cover 24 to form an air film. It should be emphasized that the thickness of the air film is usually between 5 and 20 microns. The gas pressure of the air film provides a load for the motor shaft 211, realizing the non-contact rotation of the motor shaft 211. Therefore, the gap between the magnetic bearing 214 and the concave rotating blocks 2112 is between 5 and 20 microns. In order to enable the magnetic bearing 214 to be sleeved outside the concave rotating blocks 2112, the magnetic bearing 214 is assembled in a split manner, that is, the magnetic bearing 214 is composed of two semi-circular rings, so that the magnetic bearing 214 can be assembled outside the concave rotating blocks 2112.

[0039] As an embodiment of the present invention, as Figures 1-9 shown, the magnetic bearing 214 includes a bearing body 2141. An internal channel 2142 is opened inside the bearing body 2141. An inner convex support surface 2143 is provided on the inner side of the bearing body 2141. The inner convex support surface 2143 fits with the concave rotating blocks 2112. It should be noted that the air from the second air inlet cover 24 is delivered to the inside of the bearing body 2141 through the internal channel 2142, and then discharged from the round holes opened on the surface of the inner convex support surface 2143. It should be noted that the round holes are evenly distributed on the surface of the inner convex support surface 2143. As Figure 5 and Figure 7 shown, since the inner convex support surface 2143 fits with the concave rotating blocks 2112, the air discharged from the round holes opened on the surface of the inner convex support surface 2143 will act on the concave rotating blocks 2112 evenly. And the surface of the concave rotating blocks 2112 is concave, so the concave rotating blocks 2112 will be subjected to evenly distributed radial forces, and the directions of these radial forces are different. Taking Figure 2 as an example, in this way, the concave rotating blocks 2112 will be subjected to radial forces in different directions, enabling the concave rotating blocks 2112 to be stable inside the magnetic bearing 214. And the concave rotating blocks 2112 are fixedly connected to the motor shaft 211, so the motor shaft 211 will also be stable inside the magnetic bearing 214, making the motor shaft 211 drive the first impeller 2115 to rotate more smoothly at high speed.

[0040] As an embodiment of the present invention, the air delivery mechanism 213 includes an air delivery disc 2131. A docking channel 2132 is provided at the top of the air delivery disc 2131. An exhaust cavity 2134 is provided inside the air delivery disc 2131. A docking hole 2133 is provided on one side of the air delivery disc 2131. An exhaust hole 2135 is provided on the other side of the air delivery disc 2131. It should be noted that the number of air delivery discs 2131 is two groups, which are installed on one side of the two groups of suspension bearings 214, and the built-in channel 2142 on the bearing body 2141 corresponds to the docking hole 2133 on the air delivery disc 2131. The docking channel 2132 on the side of the air delivery disc 2131 is used to receive the air delivered by the first air inlet hood 23 or the second air inlet hood 24. Specifically, the second air inlet hood 24 can deliver the air to the docking channel 2132, and the docking channel 2132 is connected to the docking hole 2133. Therefore, the docking channel 2132 can directly deliver the air delivered by the first air inlet hood 23 to the docking hole 2133, and the docking hole 2133 then delivers the air into the built-in channel 2142 on the bearing body 2141. The built-in channel 2142 can evenly act the air discharged from the round hole provided on the surface of the inner convex support surface 2143 on the inner concave rotating block 2112, realizing the air suspension function of the suspension bearing 214;

[0041] There is a gap between the suspension bearing 214 and the inner concave rotating block 2112. Therefore, the air discharged from the round hole provided on the surface of the inner convex support surface 2143 will finally be discharged through the gap between the suspension bearing 214 and the inner concave rotating block 2112. It should be noted that the position of the gap between the suspension bearing 214 and the inner concave rotating block 2112 coincides with the position of the exhaust cavity 2134. Therefore, the air discharged from the gap between the suspension bearing 214 and the inner concave rotating block 2112 will enter the interior of the exhaust cavity 2134 and finally be discharged through the exhaust hole 2135.

[0042] As an embodiment of the present invention, as Figures 1-9 shown, a number of winding hoop grooves 2121 are provided inside the stator 212. An air flow groove 2122 is provided on the side surface of the stator 212. An external connection groove 2123 is provided at the center position of the side surface of the stator 212 close to the air flow groove 2122. It should be noted that the specifications and number of the winding hoop grooves 2121 are adaptively selected by those skilled in the art according to the motor body 2. When the air entering the interior of the exhaust cavity 2134 is discharged from the exhaust hole 2135, it will enter the air flow groove 2122. Figure 9The air flow groove 2122 therein is linear. The air flow groove 2122 can also be arranged in a spiral shape and distributed on the side surface of the stator 212. In this way, when air passes through the air flow groove 2122, the air will carry away the heat on the stator 212, realizing the cooling of the stator 212. The air entering the air flow groove 2122 will converge inside the external connection groove 2123. Specifically, when the air enters the inside of the air flow groove 2122, the air will exchange heat with the stator 212. In this way, the heat on the stator 212 will be transferred to the air inside the air flow groove 2122, and the air inside the air flow groove 2122 will be automatically transported to the inside of the external connection groove 2123, realizing the cooling treatment of the stator 212 and keeping the stator 212 at a stable set temperature;

[0043] In addition, it should be noted that the air flow groove 2122 can also be opened on the end face of the stator 212 and communicated with the external connection groove 2123 along the inner direction of the stator 212, ensuring that the air entering the inside of the exhaust cavity 2134 can enter the inside of the air flow groove 2122 after being discharged from the exhaust hole 2135, improving the air cooling effect on the stator 212 and ensuring the performance and stability of the stator 212.

[0044] As an embodiment of the present invention, as Figures 1-9 shown, the exhaust mechanism 28 includes an annular groove 281. The annular groove 281 is opened at the center position of the inner cavity of the motor housing 21. The annular groove 281 is matched with the external connection groove 2123. One side of the annular groove 281 is connected with an exhaust passage 282. It should be noted that since the annular groove 281 is matched with the external connection groove 2123, the air gathered in the external connection groove 2123 will finally be transported to the inside of the annular groove 281. And the annular groove 281 is communicated with the exhaust passage 282, so the air entering the inside of the annular groove 281 will enter the inside of the exhaust passage 282 and then be transported out by the exhaust passage 282, realizing the discharge of air.

[0045] As an embodiment of the present invention, as Figures 1-9As shown, the voltage stabilizing mechanism 27 includes a voltage stabilizing housing 271. Docking ports 272 are provided on both sides of the voltage stabilizing housing 271. The docking ports 272 communicate with the air supply channel 26. A voltage stabilizing chamber 273 is provided inside the voltage stabilizing housing 271. An adjusting plate 279 is provided on the inner side surface of the voltage stabilizing chamber 273. It should be noted that since the docking ports 272 are provided on both sides of the voltage stabilizing housing 271 and the docking ports 272 communicate with the air supply channel 26, the air inhaled by the second air inlet hood 24 can be conveyed to the first air supply channel 26 through the air supply hood 25, and then conveyed to the other air supply channel 26 by the voltage stabilizing housing 271. The air supply channel 26 can convey the air to the inside of the air supply mechanism 213. Specifically, the air supply channel 26 can convey the air to the docking channel 2132, and the docking channel 2132 communicates with the docking hole 2133. Therefore, the docking channel 2132 can directly convey the air conveyed by the first air inlet hood 23 to the docking hole 2133, and the docking hole 2133 conveys the air to the built-in channel 2142 on the bearing body 2141. The built-in channel 2142 can evenly act the air discharged from the round holes provided on the surface of the inner convex support surface 2143 on the inner concave rotating block 2112, realizing the air suspension function of the magnetic suspension bearing 214;

[0046] Specifically, the adjusting plate 279 acts on the air inside the voltage stabilizing chamber 273. When the air pressure inside the voltage stabilizing chamber 273 decreases, that is, the air volume inhaled by the second air inlet hood 24 decreases, the adjusting plate 279 will squeeze the air inside the voltage stabilizing chamber 273, increasing the air pressure inside the voltage stabilizing chamber 273, so that the air pressure inside the voltage stabilizing chamber 273 is within a stable range, ensuring that the air film pressure between the magnetic suspension bearing 214 and the inner concave rotating block 2112 is within a stable range, making the rotation of the inner concave rotating block 2112 more stable, that is, making the rotation of the motor rotating shaft 211 more stable.

[0047] As an embodiment of the present invention, as Figures 1-9As shown in the figure, a mounting plate 277 is fixedly connected to the top surface of the voltage stabilizing mechanism 27. A mounting bracket 274 is fixedly connected to the top surface of the mounting plate 277. A piston cylinder 275 is fixedly connected to the inner side of the mounting bracket 274. An air pressure bottle 276 is arranged on one side of the piston cylinder 275. A piston rod 278 is fitted inside the piston cylinder 275. One end of the piston rod 278 is fixedly connected to the surface of an adjusting plate 279. It should be noted that the air pressure bottle 276 is communicated with the top end of the piston cylinder 275 through an air pipe. In this way, the air pressure bottle 276 can convey gas to the top end of the piston cylinder 275 through the air pipe to stabilize the pressure at the top end of the piston cylinder 275. When the motor body 2 is turned off, the rotational speed of the second impeller 2116 inside the second air inlet hood 24 will surely decrease. In this way, the amount of air inhaled by the second air inlet hood 24 will surely decrease. Then, since the pressure at the top end of the piston cylinder 275 directly acts on the top end of the piston rod 278, when the air pressure inside the voltage stabilizing cavity 273 corresponding to the adjusting plate 279 decreases, the balance of the adjusting plate 279 will be broken. The piston rod 278 will directly act on the adjusting plate 279, causing the adjusting plate 279 to squeeze the air inside the voltage stabilizing cavity 273 to balance the air pressure inside the voltage stabilizing cavity 273, ensuring that the air film pressure between the magnetic suspension bearing 214 and the concave rotating block 2112 is in a stable state. In this way, the concave rotating block 2112 still rotates smoothly in a short time after the motor body 2 is turned off and will not collide or rub against the magnetic suspension bearing 214. On the one hand, it ensures the smooth rotation of the motor rotating shaft 211. On the other hand, it also avoids the concave rotating block 2112 from colliding or rubbing, improves the protection effect on the concave rotating block 2112, and increases the service life of the concave rotating block 2112 and the magnetic suspension bearing 214, that is, increases the service life of the motor body 2.

[0048] The above has described an embodiment of the present invention in detail, but the content described is only the preferred embodiment of the present invention and cannot be considered as used to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. An energy-saving air suspension centrifugal fan, characterized in that, It includes a centrifugal fan cabinet (1). Inside the centrifugal fan cabinet (1), there is a motor body (2). One end of the motor body (2) is connected to a first air inlet (3), and the other end of the motor body (2) is connected to a second air inlet (5). The top surface of the motor body (2) is connected to a first air outlet (4) and a second air outlet (6). The motor body (2) includes a motor housing (21). The bottom of the motor housing (21) is fixedly connected to a motor base (22). One end of the motor housing (21) is connected to a first air intake hood (23), and the other end of the motor housing (21) is connected to a second air intake hood (24). The second air intake hood (24) is connected to an air delivery hood (25). In the middle position of the top surface of the motor housing (21), a voltage stabilizing mechanism (27) is installed. On both sides of the voltage stabilizing mechanism (27), there are air delivery channels (26). The air delivery channels (26) are communicated with the air delivery hood (25). At the center position of the front surface of the motor housing (21), an exhaust mechanism (28) is provided. The voltage stabilizing mechanism (27) includes a voltage stabilizing housing (271). On both sides of the voltage stabilizing housing (271), there are docking ports (272). The docking ports (272) are communicated with the air delivery channels (26). Inside the voltage stabilizing housing (271), there is a voltage stabilizing cavity (273). On the inner side surface of the voltage stabilizing cavity (273), there is an adjusting plate (279). On the top surface of the voltage stabilizing mechanism (27), there is a fixedly connected mounting frame (274). Inside the mounting frame (274), there is a fixedly connected piston cylinder (275). On one side of the piston cylinder (275), there is a pressure bottle (276). Inside the piston cylinder (275), there is a piston rod (278) fitted. One end of the piston rod (278) is fixedly connected to the surface of the adjusting plate (279).

2. The energy-saving air suspension centrifugal fan according to claim 1, wherein At the center position inside the motor housing (21), there is a motor rotating shaft (211). On the outer side surface of the motor housing (21) near the motor rotating shaft (211), there is a fixedly connected stator (212). On both sides of the stator (212), there is an air delivery mechanism (213). On the side of the air delivery mechanism (213) away from the stator (212), there is a magnetic suspension bearing (214).

3. The energy-saving air suspension centrifugal fan according to claim 2, characterized in that, At the middle position on the side surface of the motor rotating shaft (211), there is a rotor (2111). On both sides of the motor rotating shaft (211) near the rotor (2111), there are nested concave rotating blocks (2112).

4. The energy-saving air suspension centrifugal fan according to claim 3, characterized in that, The magnetic suspension bearing (214) includes a bearing body (2141). Inside the bearing body (2141), there is an internal channel (2142). On the inner side of the bearing body (2141), there is an inner convex supporting surface (2143). The inner convex supporting surface (2143) is fitted with the concave rotating block (2112).

5. The energy-saving air suspension centrifugal fan according to claim 2, characterized in that, The air delivery mechanism (213) includes an air delivery disc (2131). A docking channel (2132) is provided at the top of the air delivery disc (2131). An exhaust cavity (2134) is provided inside the air delivery disc (2131). A docking hole (2133) is provided on one side of the air delivery disc (2131). An exhaust hole (2135) is provided on the other side of the air delivery disc (2131).

6. The energy-saving air suspension centrifugal fan according to claim 2, wherein, A hoop winding groove (2121) is provided inside the stator (212). An air flow groove (2122) is provided on the side surface of the stator (212). An external connection groove (2123) is provided at the center position of the side surface of the stator (212) close to the air flow groove (2122).

7. The energy-saving air suspension centrifugal fan according to claim 6, wherein, The exhaust mechanism (28) includes an annular groove (281). The annular groove (281) is provided at the center of the inner cavity of the motor housing (21). The annular groove (281) is matched with the external connection groove (2123). An exhaust channel (282) is connected to one side of the annular groove (281).

8. The energy-saving air suspension centrifugal fan according to claim 2, characterized in that, One end of the motor rotating shaft (211) is fixedly connected to a first connecting shaft (2113). The other end of the motor rotating shaft (211) is fixedly connected to a second connecting shaft (2114). A first impeller (2115) is nested outside the first connecting shaft (2113). A second impeller (2116) is nested outside the second connecting shaft (2114).

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