A magnetic suspension bearing with a protective device and a pressure swing adsorption system

Abstract

The present application relates to the technical field of bearings, and in particular to a magnetic bearing with a protective device and a pressure swing adsorption system, wherein the magnetic bearing comprises: a bearing seat, a stator, a rotor, a thrust plate, an axial iron core and a protective device, the stator is arranged in the bearing seat, the rotor rotates in the stator and is concentric, the thrust plate is connected to the rotor, and an axial iron core is arranged on both sides; the protective device comprises: an elastic member, arranged on the bearing seat; a support sheet, arranged on the elastic member and protruding from the axial iron core, capable of abutting against the thrust plate; a first airbag, arranged on the bearing seat, capable of abutting against the thrust plate; an air supply member, arranged on the bearing seat, for supplying air to the first airbag; wherein the pressure swing adsorption system comprises a compressor, an air supply module, an adsorption tower, an air storage module and a desorption module of a magnetic bearing with a protective device. The present application has the effect of reducing damage to the bearing and improving the operational reliability of the magnetic bearing.

Description

Technical Field

[0001] The present application relates to the technical field of bearings, and in particular to a magnetic bearing with a protective device and a pressure swing adsorption system. Background Art

[0002] At present, magnetic bearing is a bearing technology that uses magnetic force to suspend the rotor in the air, so that there is no mechanical contact between the rotor and the stator. The principle is that the magnetic induction line is perpendicular to the magnetic levitation line, the shaft core is parallel to the magnetic levitation line, and the shaft core is almost unloaded to support the direction of the opposite magnetic levitation line, so that the entire rotor is suspended in the air and on a fixed operating track.

[0003] However, there are still some technical challenges in practical applications. When the rotor loses radial stability, the thrust plate is prone to collide with the magnetic bearing, causing bearing damage or performance degradation. In order to solve this problem, it is necessary to provide a magnetic bearing with a protective device that can effectively reduce the impact of the thrust plate and the bearing when the rotor loses axial stability, thereby reducing damage to the bearing and improving the operating reliability of the magnetic bearing. Summary of the invention

[0004] In order to reduce damage to bearings and improve the operational reliability of magnetic bearings, the present application provides a magnetic bearing with a protective device and a pressure swing adsorption system.

[0005] In a first aspect, the present application provides a magnetic bearing with a protective device, which adopts the following technical solution:

[0006] A magnetic bearing with a protective device, comprising: a bearing seat, a stator, a rotor, a thrust plate, and an axial iron core, wherein the bearing seat is used as a mounting base, the stator is fixedly arranged in the bearing seat, the rotor rotates concentrically in the stator, the thrust plate is connected to the rotor, and the axial iron core is arranged on both sides, and the axial iron core is connected to the bearing seat; and further comprising a protective device, the protective device comprising:

[0007] An elastic member, disposed on the bearing seat and passing through the axial iron core;

[0008] A support sheet, which is arranged on the elastic member and protrudes from the axial core and can abut against the thrust plate;

[0009] A first airbag is arranged on the bearing seat, is arranged corresponding to the elastic member, protrudes from the axial core, and can abut against the thrust plate;

[0010] An air supply component is arranged on the bearing seat, connected to the first airbag, and is used to supply air to the first airbag.

[0011] By adopting the above technical solution, the rotor rotates stably in the stator, a certain gap is maintained between the thrust plate and the axial iron core, and the elastic member, the support sheet and the first airbag are all in an initial state without stress; the rotor becomes axially unstable due to some reason (such as load change, imbalance, etc.), causing the thrust plate to approach the axial iron core, and the thrust plate first contacts the elastic member and the support sheet, and the elastic member begins to compress and absorb part of the impact force. At the same time, the support sheet reduces the direct impact on the first airbag, and the compression process of the elastic member gradually slows down the movement speed of the thrust plate to prevent it from It instantly hits the axial iron core, causing damage; the support plate protrudes from the axial iron core, further dispersing the impact force of the thrust plate and protecting the first airbag from direct impact; when the thrust plate approaches the first airbag, the air supply part starts to supply air to the first airbag; the first airbag expands after being inflated, forming contact with the thrust plate, generating a reaction force, and pushing the thrust plate to reset; as the thrust plate is reset, the elastic part gradually returns to its original state, and the support plate and the first airbag also return to their initial state; and in the process of the first airbag pushing the thrust plate, the equipment is slowed down to facilitate shutdown and repair.

[0012] By arranging elastic parts and support plates, the direct impact of the thrust plate on the axial core when axial instability occurs can be effectively mitigated, thereby reducing the risk of equipment damage; the arrangement of the support plates not only mitigates the impact force of the thrust plate, but also protects the first airbag from direct impact, thereby extending the service life of the airbag; the first airbag expands after being supplied with air by the air supply part, thereby generating sufficient reaction force to push the thrust plate to reset, thereby realizing an automatic recovery function; the protection device can effectively cope with the situation of axial instability of the rotor, thereby improving the stability and reliability of the entire magnetic bearing system; by mitigating impacts and automatically resetting, the protection device significantly reduces the damage to the equipment caused by axial instability, thereby reducing the repair cost and difficulty of maintenance.

[0013] Optionally, the protection device further includes:

[0014] The restraining ring is arranged around the first airbag and is used to limit the expansion direction of the first airbag so that the expansion of the first airbag pushes the thrust plate to reset.

[0015] By adopting the above technical solution, the first airbag is restricted by the restraint ring during the inflation process and can only expand in a specific direction (i.e., the direction of pushing the thrust plate to reset); the restraint ring ensures that the expansion force of the first airbag effectively acts on the thrust plate to push it to reset; the setting of the restraint ring limits the expansion direction of the first airbag, ensuring that the expansion force effectively acts on the thrust plate to push it to reset; this reduces the invalid or harmful force that may be generated by the first airbag during the expansion process, and improves the efficiency and reliability of the protection device; through the directional effect of the restraint ring, the expansion force of the first airbag can act on the thrust plate more accurately, thereby improving the reset accuracy; this helps to reduce the vibration and wear of the equipment caused by inaccurate reset and improve the overall performance of the equipment; the restraint ring not only limits the expansion direction of the first airbag, but also enhances the stability of the protection device; during the resetting process of the thrust plate, the restraint ring can prevent the first airbag from being damaged due to excessive expansion, thereby extending the service life of the protection device; because the restraint ring improves the efficiency and reliability of the protection device, the failure rate caused by equipment vibration and wear is reduced.

[0016] Optionally, it also includes:

[0017] The second airbag is arranged on the bearing seat, located on the peripheral side of the thrust plate, and is provided in plurality, corresponding to and connected with the first airbag.

[0018] By adopting the above technical solution, when the first airbag expands, the second airbag expands accordingly, so that the second airbag squeezes the side wall of the thrust plate to decelerate, which is convenient for resetting the thrust plate, and can also perform deceleration braking to reduce wear on the equipment.

[0019] Optionally, a pressure sensor is provided on the bearing seat, the pressure sensor corresponds to the elastic member, and the pressure sensor is triggered when the elastic member slides.

[0020] By adopting the above technical solution, when the elastic member slides under force and triggers the pressure sensor, the pressure sensor generates a pressure signal, and the user can know in real time that the equipment has failed, which facilitates timely maintenance.

[0021] Optionally, the bearing seat is provided with a forward movement mechanism, and the forward movement mechanism comprises:

[0022] A guide rod connected to the support sheet and slidingly moved between two adjacent axial cores;

[0023] A rotating ring is rotatably disposed on the bearing seat and is coaxial with the rotor, abutting against the guide rod, and the abutting surface forms a first driving surface. As the guide rod slides, the rotating ring is driven to rotate through the first driving surface;

[0024] A first driving block is disposed on the rotating ring;

[0025] The second driving block slides on the bearing seat along the axis of the rotor, is connected to the first airbag, abuts against the first driving block, and pushes the first airbag to approach the thrust plate as the first driving block rotates.

[0026] By adopting the above technical scheme, when the bearing becomes axially unstable, the thrust plate moves axially, the thrust plate pushes the support plate and the elastic member to slide, the support plate pushes the guide rod to slide, the guide rod drives the rotating ring to rotate, the rotating ring drives the first drive block to rotate, the first drive block drives the second drive block to slide, the second drive block drives the first airbag to squeeze the thrust plate, so that the thrust plate is reset, and through the setting of the forward movement mechanism, the thrust plate can be reset in time when the bearing becomes axially unstable, thereby enhancing the running stability of the motor; the working process of the entire forward movement mechanism is automated, without manual intervention, thereby improving the reliability and safety of the motor; by resetting the thrust plate in time, the electrical damage caused by the axial instability of the bearing can be reduced The machine failure rate is reduced and the service life of the motor is extended; the structure of the forward movement mechanism is relatively simple, mainly consisting of a guide rod, a rotating ring, a first drive block and a second drive block, etc., and is easy to manufacture and maintain; the forward movement mechanism can be applied to different types of motors, especially those that require high stability and reliability, such as industrial motors, wind turbines, etc.; and through the setting of the forward movement mechanism, the expansion amplitude of the first airbag is reduced, the damage to the first airbag is reduced, and the axial movement of the thrust plate is coordinated to synchronously realize the adjustment of the position of the first airbag, which is convenient for timely limiting the position of the thrust plate, reducing excessive slippage of the thrust plate, reducing damage to the equipment, and at the same time, facilitating rapid resetting and recovery, thereby improving the stability of the bearing operation.

[0027] Optionally, solenoid valves are provided on the first airbag and the second airbag, the solenoid valves are electrically connected to the pressure sensor, and the pressure sensor controls the opening or closing of the solenoid valves.

[0028] By adopting the above technical solution, when the elastic part triggers the pressure sensor, the pressure sensor controls the solenoid valve to open, and the air supply part supplies air to the first airbag and the second airbag. The first airbag and the second airbag expand to decelerate the thrust plate, and at the same time, the first airbag pushes the thrust plate to reset. By setting the solenoid valve, the air in the first airbag enters the second airbag when the thrust plate initially pushes the first airbag, so that the resistance to the thrust plate is maintained. At the same time, during expansion, the two airbags expand synchronously, which is convenient for attenuating the rotation speed of the thrust plate.

[0029] Optionally, the air supply member comprises:

[0030] The expansion filling layer is filled on a side of the first airbag close to the thrust plate and on a side of the second airbag close to the side wall of the thrust plate, and expands when heated.

[0031] By adopting the above technical solution, when the first airbag and the second airbag rub against the thrust plate, or the distance is too close and the local temperature rises, the expansion filling layer inside the first airbag and the second airbag expands, causing the first airbag and the second airbag to expand. The expansion filling layer is set to expand and absorb heat according to the actual friction situation, thereby reducing the local temperature and reducing the occurrence of overheating of the equipment.

[0032] When the rotor is eccentric, the rotor is too close to one side, causing the thrust plate to be close to the second airbag on one side. The temperature at the second airbag rises, and the expansion filling layer absorbs heat and expands, causing the second airbag to expand. The second airbag limits the rotation speed of the thrust plate and the position of the thrust plate at the same time, so that the rotor is no longer close to the stator, reducing the collision between the rotor and the stator during over-speed rotation and reducing damage to the equipment. It absorbs heat during the expansion process to reduce overheating of the equipment.

[0033] Optionally, a filter is provided inside the first airbag and the second airbag, and the filter separates the first airbag and the second airbag into an expansion zone and a reaction zone.

[0034] By adopting the above technical solution, the filter screen is set up to reduce the displacement of the expansion filling layer in the first airbag, so that the filling density in the reaction zone can be maintained, and the entry of debris into the expansion zone can be reduced, thereby reducing damage to the first airbag or the second airbag.

[0035] Optionally, the side walls of the first airbag and the second airbag close to the thrust plate are provided with anti-skid patterns, the anti-skid patterns are inclined, and the cross-section of the anti-skid patterns is an isosceles trapezoid, and the end with a smaller cross-sectional area is close to the thrust plate.

[0036] By adopting the above technical solution, the anti-skid pattern is set to facilitate the speed reduction of the thrust plate, and the side with a smaller cross-sectional area is close to the thrust plate, which facilitates the filling of grease in the anti-skid pattern, so that the contact surface remains lubricated, hard friction is reduced, damage to the thrust plate and the first airbag or the second airbag is reduced, and the first airbag and the second airbag have sufficient expansion space.

[0037] In a second aspect, the present application provides a pressure swing adsorption system, which adopts the following technical solution:

[0038] A pressure swing adsorption system includes a compressor with a magnetic bearing having a protection device, and also includes: an air supply module, an adsorption tower, a gas storage module and a desorption module, wherein the compressor is connected to the adsorption tower through the air supply module, the compressor is connected to an air source, the gas storage module is connected to the adsorption tower for storing adsorbed gas, and the desorption module is connected to the adsorption tower for collecting and storing the gas adsorbed by the adsorption tower.

[0039] By adopting the above technical solution, the compressor extracts gas from the gas source and sends it to the adsorption tower through the gas supply module. At this stage, the compressor plays the role of providing gas pressure and flow to ensure that the gas can smoothly enter the adsorption tower for separation and purification; in the adsorption tower, the gas mixture contacts the adsorbent and is separated according to the difference in adsorption capacity of each component on the adsorbent; usually, the impurity component has a higher adsorption capacity under high pressure, so it will be adsorbed on the adsorbent, while the ideal component (such as nitrogen or oxygen) has a lower adsorption capacity and is thus enriched in the gas phase; as the adsorption process proceeds, the adsorbent The impurity components in the attached tower gradually increase until they reach a saturated state. As the adsorption proceeds, the gas storage module stores the remaining gas. When the adsorption tower reaches a saturated state, a desorption operation is required to restore its adsorption capacity. At this time, the desorption module is connected to the adsorption tower to desorb and collect the impurity components adsorbed on the adsorbent by reducing the pressure or introducing other gases. The desorbed adsorbent can be reused in the next adsorption cycle, thereby achieving continuous cycle operation. The compressor uses magnetic levitation bearings to reduce gas source fluctuations, reduce axial instability, and damage to the equipment, allowing the equipment to operate stably.

[0040] In summary, the present application includes at least one of the following beneficial technical effects:

[0041] 1. By setting up elastic parts and support sheets, the direct impact of the thrust plate on the axial core when the thrust plate is axially unstable can be effectively reduced, thereby reducing the risk of equipment damage; the setting of the support sheet not only reduces the impact force of the thrust plate, but also protects the first airbag from direct impact, thereby extending the service life of the airbag; the first airbag expands after being supplied with air by the air supply part, and can generate sufficient reaction force to push the thrust plate to reset, thereby realizing the automatic recovery function; the protection device can effectively deal with the situation of axial instability of the rotor, and improve the stability and reliability of the entire magnetic bearing system; by reducing impact and automatic reset, the protection device significantly reduces the damage to the equipment caused by axial instability, and reduces the maintenance cost and difficulty;

[0042] 2. The filter screen can reduce the displacement of the expansion filling layer in the first airbag, so that the filling density in the reaction area can be maintained, and can reduce the entry of debris into the expansion area, thereby reducing damage to the first airbag or the second airbag;

[0043] 3. The compressor uses magnetic bearings to reduce gas source fluctuations, which may cause axial instability and damage to the equipment, allowing the equipment to operate stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a cross-sectional view of the magnetic bearing in Example 1 of the present application;

[0045] Figure 2is a diagram showing the installation position relationship between the first airbag and the support sheet in Example 1 of the present application;

[0046] Figure 3 It is a display diagram of the forward movement mechanism in Example 1 of the present application;

[0047] Figure 4 is a cross-sectional view of the first airbag in Example 1 of the present application;

[0048] Figure 5 is a cross-sectional view of the magnetic bearing in Example 2 of the present application;

[0049] Figure 6 This is a diagram showing the position of the third driving block in Example 2 of the present application;

[0050] Figure 7 is a system diagram of a pressure swing adsorption system in an embodiment of the present application.

[0051] 1. The bearing housing; 120. The stator; 130. The rotor; 140. The thrust plate; 150. The axial core; 210. The elastic member; 220. The support plate; 230. The first air bag; 231. The anti-skid pattern; 232. The reaction zone; 233. The expansion zone; 240. The restraining ring; 250. The second air bag; 260. The filter screen; 270. The sliding rod; 280. The directional ring; 300. The forward movement mechanism; 310. The guide rod; 320. The rotating ring; 321. The first driving surface; 330. The first driving block; 331. The third driving surface; 340. The second driving block; 350. The third driving block; 351. The second driving surface; 360. The fourth driving block; 400. The compressor; 500. The air supply module; 600. The adsorption tower; 700. The air storage module; 800. The desorption module. DETAILED DESCRIPTION

[0052] The following combination Figures 1 to 7 This application is described in further detail.

[0053] This embodiment discloses a magnetic suspension bearing with a protection device.

[0054] Example 1: Reference Figure 1A magnetic bearing with a protective device includes a bearing seat 110, a stator 120 arranged on the bearing seat 110, a rotor 130 rotating in the bearing seat 110, a thrust plate 140 coaxially connected to the rotor 130, an axial iron core 150 located on both sides of the thrust plate 140 and arranged on the bearing seat 110, and a protective device arranged on the bearing seat 110 for reducing the contact between the thrust plate 140 and the axial iron core 150. During the rotation of the rotor 130, when the rotor 130 is axially unstable, the thrust plate 140 moves between the two axial iron cores 150, and the protective device restricts the thrust plate 140 to reduce its collision with the axial iron core 150 and decelerates the thrust plate 140.

[0055] Reference Figure 1 and Figure 2 The bearing seat 110 is formed by assembling a plurality of annular seats by bolts, and an installation space is formed in the bearing seat 110. The stator 120 is fixedly connected in the installation space of the bearing seat 110 and is concentrically arranged with the bearing seat 110, and the rotor 130 is concentrically arranged with the stator 120. A connecting shaft is fixedly connected to the thrust plate 140, and is coaxially fixedly connected to the rotor 130 through the connecting shaft. The axial core 150 is detachably connected to the bearing seat 110, and two groups of axial cores 150 are arranged. The two groups of axial cores 150 are respectively located on both sides of the thrust plate 140, and each group of axial cores 150 includes a plurality of axial core 150 areas arranged at intervals, and six areas are preferably provided in this embodiment.

[0056] Reference Figure 1 and Figure 3 The protective device includes a plurality of covers detachably connected to the bearing seat 110 by bolts, the position of the covers corresponds to the side of the axial core 150 away from the thrust plate 140, a sliding rod 270 is slidably connected to the bearing seat 110, the sliding rod 270 slides in the gap between the adjacent areas of the axial core 150, one end of the sliding rod 270 is fixedly connected to a support sheet 220, the support sheet 220 can slide in the gap between two adjacent axial core 150 areas, the support sheet 220 can abut against the thrust plate 140, the contact surface between the support sheet 220 and the thrust plate 140 is made of a flexible material, and a plurality of lubrication grooves are provided, and grease is provided in the lubrication grooves; an elastic member 210 is provided on the sliding rod 270, the elastic member 210 is connected to the bearing seat 110 and to the support sheet 220, the elastic member 210 pushes the support sheet 220 close to the thrust plate 140, and the elastic member 210 is a spring, a spring or other elastic structure.

[0057] In order to facilitate the restriction or resetting of the thrust plate 140, a restraining ring 240 is slidingly connected between adjacent axial cores 150. The restraining ring 240 is slidingly connected to the bearing seat 110 and is open on one side of the thrust plate 140. The restraining ring 240 and the support plate 220 are spaced apart. A first airbag 230 is installed in the restraining ring 240. An air supply part is provided on the bearing seat 110 to supply air to the first airbag 230. A forward movement mechanism 300 is provided on the bearing seat 110. The forward movement mechanism 300 is connected to the restraining ring 240 and drives the restraining ring 240 to slide.

[0058] Reference Figure 4 In order to facilitate the expansion of the first airbag 230, the air supply component can be a mechanical air supply or a chemical air supply. The mechanical air supply can be an air compressor, which is extended to the bearing seat 110 through a pipeline and connected to the first airbag 230. The mechanical air supply can also use other external air sources such as fans and pressure tanks; the chemical air supply can use a chemical reaction to generate gas to supply the first airbag 230; the air supply component of this embodiment includes an expansion filling layer, and the first airbag 230 is filled with the expansion filling layer; a plurality of second airbags 250 are arranged on the bearing seat 110, and correspond to the first airbag 230, and the second airbag 250 is connected to the first airbag 230 through a hose, and an electromagnetic valve is arranged at the connection point, and the second airbag 250 is also filled with an expansion filling layer, and The expansion filling layer is located on the side close to the thrust plate 140. The first airbag 230 and the second airbag 250 are both fixedly connected with a filter 260. The filter 260 separates the first airbag 230 or the second airbag 250 into a reaction zone 232 and an expansion zone 233. The expansion filling layer is located in the reaction zone 232. The expansion filling layer is a chemical material that absorbs heat and expands or releases gas. The expansion filler can be ammonium salt chemicals, baking soda, or porous materials adsorbed with gas (such as activated carbon or certain metal organic frameworks). The porous material can release the adsorbed gas (such as nitrogen, carbon dioxide) when heated. This embodiment preferably uses ammonium salt chemicals such as ammonium carbonate. The ammonium carbonate is compacted and pierced before being filled in the reaction zone 232.

[0059] A pressure sensor is provided on the bearing seat 110, which is connected to the sliding rod 270 and is triggered as the sliding rod 270 slides. The pressure sensor can be connected to the electrical signal of the solenoid valve, and a processor is connected in the middle to control the delayed opening or closing of the solenoid valve.

[0060] Reference Figure 1 and Figure 3The forward movement mechanism 300 includes a guide rod 310 fixedly connected to the support sheet 220, the guide rod 310 slides between the axial cores 150, and the guide rod 310 is fixedly connected to the sliding rod 270; a rotating ring 320 is rotatably connected in the bearing seat 110, and the rotating ring 320 is located at the end of the guide rod 310 away from the sliding rod 270, and the end of the guide rod 310 away from the sliding rod 270 can abut against the rotating ring 320, and a plurality of first driving surfaces 321 corresponding to the guide rod 310 are formed on the rotating ring 320, and the first driving surfaces 321 are inclined and inclined along the circumference of the rotating ring 320, as the guide rod 310 moves away from the thrust plate 140 The first driving surface 321 drives the rotating ring 320 to rotate by sliding in the direction of the rotation; a plurality of first driving blocks 330 are fixedly connected to the rotating ring 320, and the first driving block 330 corresponds to the restraining ring 240; a second driving block 340 is fixedly connected to the restraining ring 240, and the second driving block 340 slides on the bearing seat 110 along the axial direction of the bearing seat 110; the second driving block 340 corresponds to the first driving block 330, and the second driving block 340 abuts against the first driving block 330, and the abutting surfaces of the first driving block 330 and the second driving block 340 form a third driving surface 331, and the inclination direction of the third driving surface 331 is opposite to that of the first driving surface 321.

[0061] In order to reduce the friction between the thrust plate 140 and the first airbag 230 or the second airbag 250, an inclined anti-slip groove 231 is provided on the side of the first airbag 230 and the second airbag 250 close to the thrust plate 140. The cross-section of the anti-slip groove 231 is an isosceles trapezoid, and the end with a smaller cross-sectional area is close to the thrust plate 140, and is filled with grease.

[0062] The implementation principle of Example 1 of the present application is: when the rotor 130 rotates normally in the bearing seat 110, the thrust plate 140 remains stable and does not contact the axial iron core 150; the support plate 220 maintains a certain distance from the thrust plate 140 under the action of the elastic member 210, and no interference occurs.

[0063] When the rotor 130 is axially unstable due to some reason (such as load change, external interference, etc.), the thrust plate 140 will move between the two axial cores 150; the thrust plate 140 contacts the support sheet 220 and squeezes the support sheet 220, causing the sliding rod 270 and the guide rod 310 to slide, and the guide rod 310 drives the rotating ring 320 to rotate, so that the first airbag 230 approaches and abuts against the thrust plate 140. The flexible material of the support sheet 220 and the grease in the lubrication groove help reduce friction and wear; at the same time, the movement of the thrust plate 140 triggers the pressure sensor , the pressure sensor sends a signal to the solenoid valve through the processor; the solenoid valve opens according to the preset delay or condition, allowing the gas in the second airbag 250 to enter the first airbag 230 through the hose; and as the friction between the first airbag 230 and the thrust plate 140 generates heat, the first airbag 230 expands, restricting or resetting the thrust plate 140, reducing its collision with the axial core 150; the expansion filling layer (such as ammonium carbonate) releases gas when absorbing heat, further promoting the expansion of the first airbag 230 and the second airbag 250, and slowing down and resetting the thrust plate 140.

[0064] Example 2: Reference Figure 5 and Figure 6 , which is different from Example 1, in order to facilitate the sliding of the second airbag 250, a plurality of directional rings 280 are slidably connected to the bearing seat 110, and the directional rings 280 slide along the radial direction of the bearing seat 110, and a restraining space is formed on the directional rings 280, and the second airbag 250 is located in the restraining space of the directional rings 280; a fourth driving block 360 is slidably connected to the bearing seat 110, and the fourth driving block 360 is fixedly connected to the directional ring 280, and has the same sliding direction as the directional ring 280; a plurality of third driving blocks 350 are fixedly connected to the rotating ring 320, and the third driving block 350 abuts against the side of the fourth driving block 360 away from the positioning ring, and the abutting surface of the third driving block 350 and the fourth driving block 360 forms a second driving surface 351, and the inclination direction of the second driving surface 351 is the same as that of the third driving surface 331, and as the third driving block 350 rotates, the fourth driving block 360 and the positioning ring are driven to approach the axis of the rotor 130.

[0065] The third driving block 350 on the rotating ring 320 abuts against the fourth driving block 360, and drives the directional ring 280 and the second airbag 250 to approach the axis of the rotor 130 through the second driving surface 351; under the joint action of the first airbag 230 and the restraining ring 240, the thrust plate 140 is restricted within a safe range to avoid further collision with the axial iron core 150; when the rotor 130 regains stability, the thrust plate 140 returns to its initial position, and the various components in the protection device also return to their initial state.

[0066] The embodiments of the present application also disclose a pressure swing adsorption system.

[0067] Reference Figure 7 The pressure swing adsorption system includes the following modules: a compressor 400 containing a magnetic bearing, an air supply module 500, an exhaust pipe, an adsorption tower 600, a gas storage module 700 and a desorption module 800. The compressor 400 includes a casing, a motor, a magnetic bearing and an impeller. The impeller rotates in the casing, and the motor main shaft is connected to the impeller through a magnetic bearing. An air inlet end and an exhaust end are arranged on the outer shell, the air inlet end is connected to the air source, and the exhaust end is connected to the air supply module 500. The air supply module 500 includes an air inlet pipe and a valve arranged on the air inlet pipe. The air inlet pipe extends into the adsorption tower 600. An adsorbent layer is arranged in the adsorption tower 600. The air inlet pipe is located on one side of the adsorbent layer. The exhaust pipe is fixedly connected to the adsorption tower 600 and on the other side of the adsorbent layer. The gas storage module 700 is connected to the exhaust pipe for collecting residual gas. The gas storage module 700 includes an air storage tank connected to the exhaust pipe, and an exhaust valve is arranged on the exhaust pipe. The desorption module 800 includes a vacuum pump and an air storage tank. The air storage tank is connected to the air inlet pipe through the vacuum pump, and a control valve is arranged at the connection.

[0068] The implementation principle of a pressure swing adsorption system in an embodiment of the present application is as follows: first, start the compressor 400 containing a magnetic bearing; the magnetic bearing uses magnetic force to suspend and stably rotate the impeller of the compressor 400, reducing the mechanical friction and wear of traditional bearings and improving the operating efficiency and stability of the compressor 400; open the valve on the air supply module 500 to allow the air source to enter the compressor 400 through the air inlet end, and the compressor 400 compresses the gas and then discharges it to the air supply module 500 through the exhaust end.

[0069] The compressed gas enters the adsorption tower 600 through the air inlet pipe of the air supply module 500. The air inlet pipe extends to one side of the adsorbent layer in the adsorption tower 600, where the gas contacts the adsorbent. The adsorbent in the adsorbent layer adsorbs specific components in the gas, such as nitrogen, oxygen, etc., and can selectively adsorb the target gas according to the type and properties of the adsorbent. After passing through the adsorbent layer, the remaining gas (i.e., the gas that has not been adsorbed) is discharged to the gas storage tank through the exhaust pipe for collecting the remaining gas.

[0070] When the adsorbent reaches saturation or needs to be regenerated, the desorption module 800 is started, the control valve connecting the vacuum pump and the air inlet pipe is opened, the vacuum pump starts to work, and the pressure in the adsorption tower 600 is reduced to a negative pressure state; the desorbed gas enters the gas storage tank through the air inlet pipe for collection and treatment. These gases can be reused as needed.

[0071] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A magnetic bearing with a protective device, comprising: A bearing seat (110), a stator (120), a rotor (130), a thrust plate (140), and an axial iron core (150), wherein the bearing seat (110) is used as a mounting base, the stator (120) is fixedly arranged in the bearing seat (110), the rotor (130) rotates concentrically in the stator (120), the thrust plate (140) is connected to the rotor (130), and the axial iron core (150) is arranged on both sides, and the axial iron core (150) is connected to the bearing seat (110); characterized in that: a protection device is also included, and the protection device comprises: An elastic member (210) is disposed on the bearing seat (110) and passes through the axial iron core (150); A support sheet (220) is disposed on the elastic member (210) and protrudes from the axial iron core (150), and is capable of contacting the thrust plate (140); A first airbag (230) is arranged on the bearing seat (110), is arranged corresponding to the elastic member (210), protrudes from the axial iron core (150), and can abut against the thrust plate (140); An air supply component is arranged on the bearing seat (110), connected to the first air bag (230), and used to supply air to the first air bag (230).

2. The magnetic bearing with a protective device according to claim 1, characterized in that: The protection device also includes: A restraining ring (240) is arranged around the first airbag (230) and is used to limit the expansion direction of the first airbag (230), so that the first airbag (230) expands and pushes the thrust plate (140) to reset.

3. The magnetic bearing with a protective device according to claim 2, characterized in that: Also includes: A second airbag (250) is arranged on the bearing seat (110), located on the peripheral side of the thrust plate (140), and is provided in plurality, corresponding to and connected to the first airbag (230).

4. The magnetic bearing with a protective device according to claim 3, characterized in that: A pressure sensor is provided on the bearing seat (110), the pressure sensor corresponds to the elastic member (210), and the pressure sensor is triggered when the elastic member (210) slides.

5. The magnetic bearing with a protective device according to claim 4, characterized in that: The bearing seat (110) is provided with a forward movement mechanism (300), and the forward movement mechanism (300) comprises: A guide rod (310) connected to the support sheet (220) and slidingly movable between two adjacent axial iron cores (150); a rotating ring (320) rotatably disposed on the bearing seat (110), coaxially with the rotor (130), abutting against the guide rod (310), and abutting against a first driving surface (321); as the guide rod (310) slides, the rotating ring (320) is driven to rotate via the first driving surface (321); A first driving block (330) is arranged on the rotating ring (320); The second driving block (340) slides on the bearing seat (110) along the axis of the rotor (130), is connected to the first airbag (230), abuts against the first driving block (330), and pushes the first airbag (230) to approach the thrust plate (140) as the first driving block (330) rotates.

6. The magnetic bearing with a protective device according to claim 4, characterized in that: Solenoid valves are provided on the first airbag (230) and the second airbag (250), the solenoid valves are electrically connected to the pressure sensor, and the pressure sensor controls the opening or closing of the solenoid valves.

7. The magnetic bearing with a protective device according to claim 6, characterized in that: The gas supply member comprises: The expansion filling layer is filled on a side of the first airbag (230) close to the thrust plate (140) and on a side of the second airbag (250) close to the side wall of the thrust plate (140), and expands when heated.

8. The magnetic bearing with a protective device according to claim 4, characterized in that: A filter screen (260) is provided inside each of the first airbag (230) and the second airbag (250), and the filter screen (260) separates each of the first airbag (230) and the second airbag (250) into an expansion zone (233) and a reaction zone (232).

9. The magnetic bearing with a protective device according to claim 4, characterized in that: Anti-skid patterns (231) are provided on the side walls of the first airbag (230) and the second airbag (250) close to the thrust plate (140); the anti-skid patterns (231) are provided at an angle, and the cross-section of the anti-skid patterns (231) is an isosceles trapezoid, with the end with a smaller cross-sectional area close to the thrust plate (140).

10. A pressure swing adsorption system, characterized in that: A compressor (400) comprising a magnetic bearing with a protective device according to any one of claims 1 to 9, further comprising: an air supply module (500), an adsorption tower (600), an air storage module (700) and a desorption module (800), wherein the compressor (400) is connected to the adsorption tower (600) via the air supply module (500), the compressor (400) is connected to an air source, the air storage module (700) is connected to the adsorption tower (600) for storing adsorbed gas, and the desorption module (800) is connected to the adsorption tower (600) for collecting and storing the gas adsorbed by the adsorption tower (600).

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