An oxygen production separation valve

Abstract

The present invention discloses an oxygen-generating separation valve, comprising a valve base and a housing assembly, characterized in that it further comprises a drive assembly, a valve disc, a rotating disc, a first-stage sun gear, a planetary assembly, a silencer cover plate, and a silencer foam plate. The output connection portion of the drive assembly is fixedly connected to the first-stage sun gear; the first-stage sun gear is connected to the planetary assembly as an input portion; the first-stage sun gear and the planetary assembly are built into the inner gear ring, the lower portion of the planetary assembly is connected to the rotating disc, and the rotating disc is built into the rotary valve cavity; the valve disc is coaxially fixed to the valve base; the housing assembly is coaxially connected and fixed to the valve base and the silencer cover plate in sequence through the flange; and the silencer foam plate is placed in the silencer groove of the valve base. The oxygen-generating separation valve has the advantages of high coaxiality, long service life, motor self-cooling, wear-resistant self-maintaining sealing function, full sealing, stable oxygen production, and high oxygen production efficiency.

Description

Technical Field

[0001] The present invention relates to a separation valve, in particular to an oxygen-making separation valve. Background Art

[0002] At present, the oxygen production separation valve is an important part of the PSA oxygen production system. Its performance directly affects the oxygen production effect of the machine. The core components of the separation valve are the valve disc, the rotating disc, and the motor. When working, the rotating disc is tightly fitted with the valve disc under the action of the axial pressure of the air pressure. The motor drives the rotating disc to move in a circular motion. Secondly, the respective airway structures of the rotating disc and the valve disc realize the orderly alternation of oxygen production and nitrogen exhaust while rotating relative to each other. During the rotation process, the friction generated by the rotating disc under the action of the axial pressure directly affects the life of the motor.

[0003] The oxygen separation valves circulating on the market have rotating discs without central positioning, resulting in lateral deviation of the rotating disc. The lateral deviation will continue to increase the rotational resistance, requiring further improvement of the output torque of the motor, which further reduces the life of the motor. At the same time, the lateral deviation causes the position of the original flow channel to change, as well as the sealing condition, resulting in unstable oxygen production and low oxygen production efficiency. The original valve disc and rotating disc are basically composed of ceramic materials. The valve disc and rotating disc made of ceramic materials need to further grind their sealing end faces, and this grinding process is time-consuming and has high production costs.

[0004] Secondly, the sealing method currently used in the market for connecting the motor and the rotating disk is dynamic sealing. Since the rotating disk always follows the motor in circular motion, its dynamic sealing component will wear out as the number of rotations increases. The wear of the dynamic sealing component will lead to poor airtightness, further affecting the stability of oxygen production. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and provide an oxygen production separation valve.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An oxygen-generating separation valve comprises a valve base, a housing assembly, a drive assembly, a valve disc, a rotating disc, a primary sun gear, a planetary assembly, a silencer cover, and a silencer foam plate. The housing assembly comprises an inner gear ring, a rotary valve cavity, a flange, a motor housing or a rotor housing. The lower portion of the inner gear ring is connected to the rotary valve cavity, the outer wall of the rotary valve cavity is connected to the flange, the upper portion of the inner gear ring is connected to the motor housing or the rotor housing, the output connection portion of the drive assembly is fixedly connected to the primary sun gear, and the primary sun gear is connected to the planetary assembly as an input portion. The drive assembly is a motor or consists of a stator and a rotor assembly. The motor is built into the motor housing or the stator is mounted on the outer wall of the rotor housing and the rotor assembly is built into the rotor housing. The primary sun gear and the planetary assembly are built into the inner gear ring. The lower portion of the planetary assembly is connected to the rotating disc, and the rotating disc is built into the rotary valve cavity. The valve disc is coaxially fixed to the valve base. The housing assembly is coaxially connected and fixed together with the valve base and the silencer cover plate through the flange, and the silencer foam plate is placed in the silencer groove of the valve base.

[0008] Preferably, a central axis hole matching the central shaft sleeve is provided in the center of the valve base, and hole A positioning circles and hole B positioning circles of the same size and symmetrical position are provided on both sides of the central axis hole. The central axis hole is connected to the silencer groove, and connection ports A and B of the same shape are provided below the hole A positioning circles and the hole B positioning circles respectively.

[0009] Preferably, an exhaust port matching the central shaft sleeve is provided in the center of the valve disc, and port A and port B of the same size and symmetrical position are provided on both sides of the exhaust port. The position of port A corresponds to the A hole positioning circle, and the position of port B corresponds to the B hole positioning circle. A positioning hole column A and B positioning hole column protruding downward are formed below the A port and the B port, respectively. The valve disc is embedded and sealed in the A hole positioning circle and the B hole positioning circle on the valve base through the A positioning hole column and the B positioning hole column.

[0010] Preferably, a sealing plane is provided on the end surface of the valve disc, and the sealing plane is connected to the A port, the B port, and the exhaust port respectively, and the flatness of the sealing plane is 0-8 μm.

[0011] Preferably, the planetary assembly includes a planetary carrier and planetary gears matched with the primary sun gear and the inner ring gear. The planetary carrier is provided with a planetary disk, and a sun hole is provided in the center of the planetary disk. The planetary disk forms a raised secondary sun gear matched with the planetary gear downward, and the sun hole passes through the planetary disk and the secondary sun gear in sequence. The planetary disk forms a raised primary gear shaft matched with the planetary gear upward. The number of primary gear shafts is more than 2, and the primary gear shafts are evenly distributed on the same pitch circle, which is concentric with the sun hole.

[0012] Preferably, a sealed inner groove is provided on the rotating disk, and the sealed inner groove includes a separation groove and a centering hole. The centering hole is arranged at the center of the rotating disk, and the centering hole is laterally connected to the separation groove. A sealing step connected to the centering hole and the separation groove is provided below the sealed inner groove. The end face flatness of the sealing step is: 0~8μm. A center positioning shaft coaxial with the centering hole is provided above the sealed inner groove. A secondary gear shaft matching the planetary gear is provided above the sealed inner groove. The number of secondary gear shafts is more than 2, and they are evenly distributed on the same pitch circle, and the pitch circle is concentric with the center positioning shaft.

[0013] Preferably, the motor housing includes a motor mounting cavity and an air intake connection cover, the air intake connection cover is inserted into the motor mounting cavity and sealed in the motor mounting cavity; the motor mounting cavity is above the inner gear ring and connected to the inner gear ring.

[0014] Preferably, a guide groove communicating with the inner wall of the motor installation cavity is provided on the inner wall of the motor installation cavity.

[0015] Preferably, the air intake connection cover includes a sealing cover hole that matches the outer wall of the motor mounting cavity, and a sealing cover plate connected to the sealing cover hole is provided above the sealing cover hole, an upper sealing groove is provided on the sealing cover plate, and the sealing cover plate is provided with an upwardly protruding C-connecting port, the C-connecting port is communicated with the sealing cover hole, a glue pouring groove is provided on the sealing cover plate and on the side of the C-connecting port, and a lead hole is provided at the bottom of the glue pouring groove.

[0016] Preferably, the rotor housing includes a rotor installation cavity, which is above the inner gear ring and connected to the inner gear ring. A C-connecting port is provided above the rotor installation cavity and the rotor installation cavity is in communication with the C-connecting port.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention uses the central positioning shaft of the rotating disk and the central shaft sleeve fixed to the valve disk and the valve base, so that the rotating disk always moves in a circular motion around the center under the drive of the motor, without generating lateral resistance, thereby ensuring the service life of the motor; at the same time, it also ensures the stability of oxygen production and the reliability of sealing.

[0019] The sealing step on the rotating disk has a self-compensation function in the event of material wear, further ensuring the service life of the oxygen valve.

[0020] Secondly, the motor is built into the motor mounting cavity or the rotor assembly is built into the rotor mounting cavity, and the stator is fixed to the outer wall of the rotor mounting cavity, achieving a fully sealed function, avoiding leakage of the dynamic seal, and further ensuring the stability and efficiency of oxygen production.

[0021] Finally, the air inlet is set on the C-connector, which cools the motor or stator and ensures the service life of the motor or stator. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described with reference to the accompanying drawings:

[0023] Figure 1 The structure of the present invention is schematically shown Figure 1 ;

[0024] Figure 2 The structure of the present invention is schematically shown Figure 2 ;

[0025] Figure 3 The structure of the valve base in the present invention is shown in FIG. Figure 1 ;

[0026] Figure 4 The structure of the valve base in the present invention is shown in FIG. Figure 2 ;

[0027] Figure 5 Schematic diagram of the internal structure of the motor housing in the present invention;

[0028] Figure 6 Schematic diagram of the external structure of the motor housing in the present invention;

[0029] Figure 7 Schematic diagram of the internal structure of the rotor housing in the present invention;

[0030] Figure 8 Schematic diagram of the structure of the valve disc in the present invention;

[0031] Figure 9 Schematic diagram of the structure of the sound-absorbing baffle in the present invention;

[0032] Figure 10 The structure of the rotating disk in the present invention is shown as follows Figure 1 ;

[0033] Figure 11 The structure of the rotating disk in the present invention is shown as follows Figure 2 ;

[0034] Figure 12 The structure of the planet carrier in the present invention is shown as follows Figure 1 ;

[0035] Figure 13 The structure of the planet carrier in the present invention is shown as follows Figure 2 ;

[0036] Figure 14 Schematic diagram of the external structure of the air intake connection cover of the present invention;

[0037] Figure 15 Schematic diagram of the internal structure of the air intake connection cover of the present invention;

[0038] Figure 16 This is a temperature comparison table of the motor in Example 1 when it is cooled and when it is not cooled;

[0039] In the figure, 1-valve base, 101-valve seat bottom surface, 102-A hole positioning circle, 103-B hole positioning circle, 104-center axis hole, 105-lower sealing groove, 106-first screw hole, 109-silencer groove;

[0040] 2A - motor housing, 2B - rotor housing, 201 - rotary valve chamber, 202 - inner gear ring, 203A - motor mounting chamber, 203B - rotor mounting chamber, 204A - flow guide groove, 204B - flow guide hole groove, 205 - motor baffle, 206 - flange, 207 - mounting hole, 208 - sealing screw hole;

[0041] 3-valve disc, 301-sealing plane, 302-A port, 303-B port, 304-exhaust port, 305-A positioning hole column, 306-B positioning hole column;

[0042] 4-silencer cover, 401-A guide hole, 402-B guide hole, 403-silencer hole, 404-second screw hole;

[0043] 5-rotating disk, 501-centering shaft, 502-secondary gear shaft, 503-secondary small step, 504-sealing inner groove, 5041-sealing step, 5042-centering hole. 5043-separation groove;

[0044] 6-center sleeve;

[0045] 7- planet carrier, 701- sun hole, 702- sun step, 703- primary step, 704- primary gear shaft, 705- planet disk, 706- secondary sun gear;

[0046] 8-First-stage sun gear;

[0047] 9-Planetary gear;

[0048] 10-motor, 10A-coil, 10B-magnetic ring, 10C-rotor support plate, 10D-bearing, 10E-rotating shaft;

[0049] 11-air inlet connection cover, 1101-glue filling groove, 1102-fixing hole, 1103-upper sealing groove, 1104-sealing cover hole, 1105-sealing cover plate;

[0050] 12-A connector;

[0051] 13-B connector;

[0052] 14-C connector;

[0053] 15-Sealing gasket. DETAILED DESCRIPTION

[0054] The embodiments of the present invention are described below with reference to the accompanying drawings. In the process, to ensure clarity and convenience of the description, we may exaggerate the width of the lines or the size of the components in the drawings.

[0055] In addition, the following terms are defined based on the functions of the present invention and may vary depending on the intentions or practices of the user or operator. Therefore, these terms are defined based on the entire content of this specification. Example

[0056] Reference Figure 1 An oxygen separation valve includes a valve base 1, a housing assembly 2, a drive assembly, a valve disc 3, a rotating disc 5, a first-stage sun gear 8, a planetary assembly, a silencer cover 4, and a silencer foam board.

[0057] The housing assembly 2 includes an inner gear ring 202, a rotary valve chamber 201, a flange 206, and a motor housing 2A. The lower portion of the inner gear ring 202 is connected to the rotary valve chamber 201, and the outer wall of the rotary valve chamber 201 is connected to the flange 206. The upper portion of the inner gear ring 202 is connected to the motor housing 2A.

[0058] The motor 10 is built into the motor housing 2A; the output connection portion of the motor 10 is fixedly connected to the primary sun gear 8; the primary sun gear 8 is connected to the planetary assembly as an input portion;

[0059] Among them, the first-stage sun gear 8 and the planetary assembly are built into the inner gear ring 202, and the lower part of the planetary assembly is connected to the rotating disk 5, which is built into the rotary valve chamber 201;

[0060] Wherein, the valve disc 3 is coaxially fixed on the valve base 1;

[0061] The housing assembly 2 is coaxially connected and fixed to the valve base 1 and the silencer cover 4 in sequence through the flange 206; the silencer foam plate is placed in the silencer groove 109 of the valve base 1 to eliminate the noise caused by exhaust.

[0062] Among them, the first-stage sun gear 8, the planetary assembly, and the inner ring gear 202 constitute a planetary transmission, which reduces the load of the motor 10 and increases the service life of the motor 10.

[0063] According to the above technical features, Figure 1 , specifically combined Figures 3 to 6 、 Figures 8 to 14 The working principle of the oxygen production valve of the present invention is further described as follows:

[0064] First, the principle of pressure swing adsorption is explained to help quickly understand the working principle of the oxygen production valve of the present invention. The details are as follows:

[0065] The pressure swing adsorption oxygen generator is an automated device that uses zeolite molecular sieve as an adsorbent and utilizes the principle of pressurized adsorption and reduced pressure desorption to adsorb and release nitrogen from the air, thereby separating oxygen. Zeolite molecular sieve is a spherical granular adsorbent that is processed through a special pore treatment process. The surface and interior are covered with micropores and are white in color. Its pore characteristics enable it to achieve kinetic separation of O2 and N2. The separation effect of zeolite molecular sieve on O2 and N2 is based on the slight difference in the kinetic diameters of the two gases. N2 molecules have a faster diffusion rate in the micropores of the zeolite molecular sieve, while O2 molecules have a slower diffusion rate. The diffusion of water and CO2 in compressed air is not much different from that of nitrogen. What is ultimately enriched from the adsorption tower is oxygen molecules. For ease of understanding, the two towers equipped with zeolite molecular sieves are defined as Tower A and Tower B in the present invention.

[0066] After being compressed by the air compressor, the air undergoes dust removal, oil removal, and drying before entering the air storage tank. It then passes through the oxygen separation valve and port A 302 and enters Tower A. Tower A's pressure increases, and the nitrogen molecules in the compressed air are adsorbed by the zeolite molecular sieve. The unabsorbed oxygen passes through the adsorption bed, passes through the A and oxygen production valves, and enters the oxygen storage tank. This process is called A absorption and lasts approximately 60 seconds. After the A absorption process is complete, Tower A and Tower B are connected via a pressure equalizing valve to equalize the pressures in the two towers. This process is called pressure equalization and lasts 3-5 seconds. After pressure equalization, the compressed air passes through the oxygen separation valve and port B 303 and enters Tower B. Tower B's pressure increases, and the nitrogen molecules in the compressed air are adsorbed by the zeolite molecular sieve. The unabsorbed oxygen passes through the adsorption bed, passes through the B and oxygen production valves, and enters the oxygen storage tank. This process is called B absorption and lasts approximately 60 seconds. Simultaneously, the oxygen adsorbed by the zeolite molecular sieve in Tower A is released back into the atmosphere through the exhaust port 304, which is reduced in pressure. This process is called desorption. Conversely, while Tower A is adsorbing, Tower B is also desorbing. To allow the nitrogen released by the molecular sieve's depressurization to escape into the atmosphere, oxygen is swept through the desorbing adsorption tower via a normally open backflush valve, blowing the oxygen in the tower out of the tower. This process, called backflush, occurs simultaneously with desorption. After the B absorption process is complete, the pressure equalization process begins, and then the A absorption process is switched to, continuing the cycle.

[0067] Rotation working principle: The motor 10 is driven by the controller and drives the rotating disk 5 to perform circular motion around the central shaft sleeve 6 through the planetary reducer.

[0068] Principle of oxygen production and nitrogen exhaust: Among them, the C connection port 14 is used as the air inlet connection port and is arranged on the air inlet connection cover 11. When the compressed air enters the C connection port 14 and flows into the motor mounting cavity 203A, the compressed air cools the motor 10 built into the motor mounting cavity 203A. The compressed air flows through the guide groove 204A on the motor mounting cavity 203A and quickly enters the rotary valve cavity 201 through the planetary reducer. Under the action of the air pressure of the compressed air, the rotating disk 5 generates an axial pressure, so that the rotating disk 5 and the valve disk 3 fit tightly. Driven by the motor 10, the inner hole of the central shaft 6 sleeve is alternately connected with the inner hole of the A port 302 and the inner hole of the B port 303. When the inner hole of the central shaft sleeve 6 is connected with the inner hole of the A port 302, that is, the sealing inner groove 504 covers the inner hole of the central shaft sleeve 6 and the A port 302, it is now a low-pressure area and is in a nitrogen exhaust state; the B port 303 and the B tower are in an oxygen production state. When the inner bore of central sleeve 6 communicates with the inner bore of port B 303, that is, sealing inner groove 504 covers the inner bore of central sleeve 6 and port B 303, the system enters a low-pressure zone, representing nitrogen exhaust. Port A 303 and Tower A are in an oxygen production state. This principle of operation ensures an orderly alternation of oxygen production and nitrogen exhaust.

[0069] First, according to the above action principle, refer to Figure 3 、 Figure 4 、 Figure 8 The installation and fixation of the valve base 1 and the valve disc 3 are further described in detail as follows:

[0070] The valve base 1 integrates multiple technical features by using an injection molding process, thereby achieving integration and reducing manufacturing costs.

[0071] The center of the valve base 1 is provided with a central shaft hole 104 that matches the central shaft sleeve 6.

[0072] Among them, on both sides of the central axis hole 104 are provided with A hole positioning circle 102 and B hole positioning circle 103 of the same size and symmetrical position;

[0073] The central axis hole 104 is connected to the muffler groove 109.

[0074] Wherein, an A connection port 12 and a B connection port 13 of the same shape are respectively provided below the A hole positioning circle 102 and the B hole positioning circle 103 .

[0075] Among them, the center of the valve disc 3 is provided with an exhaust port 304 that matches the central shaft sleeve 6, and on both sides of the exhaust port 304 are provided with an A port 302 and a B port 303 of the same size and symmetrical position; the position of the A port 302 corresponds to the A hole positioning circle 102, and the position of the B port 303 corresponds to the B hole positioning circle 103; downwardly protruding A positioning hole columns 305 and B positioning hole columns 306 are formed below the A port 302 and the B port 303 respectively.

[0076] The above-mentioned center sleeve 6 passes through the exhaust port 304 in turn and is fixed in the center shaft hole 104. The fixing method can be an interference fit method or a glue fixing method. The fixing method can be a sealed fixation or an unsealed fixation method. Because the inner hole of the center sleeve 6 is completely in the low-pressure area, it is connected with the silencer groove 109 for exhaust. The main functions of the center sleeve 6 are: on the one hand, it plays a center positioning role for the rotating disk 5 to prevent the rotating disk 5 from offsetting during the rotation process; on the other hand, because the inner hole of the center sleeve 6 is connected with the silencer groove 109, it plays an exhaust role.

[0077] The valve disc 3 is embedded and sealed within the A-hole locating circle 102 and the B-hole locating circle 103 on the valve base via the A-hole locating column 305 and the B-hole locating column 306, ultimately ensuring that the bottom surface of the valve disc 3 is tightly attached to the valve seat bottom surface 101. In the present invention, the valve disc 3 and the valve base 1 are sealed using either high- and low-temperature-resistant, environmentally friendly glue or by inserting O-rings into the A-hole locating column 305 and the B-hole locating column 306, with the A-hole locating column 305 and the B-hole locating column 306 forming an interference fit with the A-hole locating circle 102 and the B-hole locating circle 103, respectively. This sealing method is used to prevent cross-talk between the A-hole 302 and the B-hole locating column 303, which could affect the stability and efficiency of oxygen production.

[0078] The end surface of the valve disc 3 forms a sealing plane 301, which communicates with port A 302, port B 303, and exhaust port 304. To ensure sealing stability and service life, the sealing plane 301 has a flatness of 0 to 8 μm and a smooth surface. To enhance sealing stability, the valve disc 3 is constructed from wear-resistant materials such as alumina ceramic, copper alloy, and stainless steel.

[0079] In order to make the valve base 1 and the housing assembly 2 play a sealing and fixing role, Figure 5 、 Figure 6 As shown:

[0080] A lower sealing groove 105 is formed on the outer underside of the valve seat bottom surface 101. This lower sealing groove 105 is used to accommodate an O-ring that matches the lower sealing groove 105. The tight fit of the flange 206 on the housing assembly 2 and the valve base 1 ensures that the O-ring is always in contact with the end surface of the flange 206, preventing compressed air from leaking out. Furthermore, two or more first screw holes 106 are provided on the exterior of the lower sealing groove 105. Screws of the same specification are used to sequentially connect and secure the mounting holes 207 on the flange 206, the first screw holes 106, and the second screw holes 404 on the muffler cover 4. This achieves two goals at once, is easy to install, and has low material costs.

[0081] In order to install the silencer cover 4 on the valve base 1, Figure 9 As shown:

[0082] The silencer cover plate 4 is provided with guide holes A 401 and B 402 corresponding to the connection ports A 12 and B 13. The guide holes A 401 and B 402 are inserted into the connection ports A 12 and B 13, respectively, so that the silencer cover plate 4 fits snugly against the bottom of the valve base 1. Furthermore, multiple silencer holes 403 are provided in the center of the silencer cover plate 4 to further reduce noise and exhaust.

[0083] According to the above action principle, refer to Figure 5 、 Figure 12 、 Figure 13 Combine Figure 1 The planetary reducer is further described in detail as follows:

[0084] The planetary reducer includes an input part: a primary sun gear 8 , and a transmission part: a planetary assembly and an inner ring gear 202 on the housing assembly 2 .

[0085] The planetary assembly includes a planetary carrier 7, a primary sun gear 8, and a planetary gear 9 matched with the inner ring gear 202.

[0086] The planet carrier is further optimized. A planetary disc 705 is provided on the planetary disc 705. A sun hole 701 is provided at the center of the planetary disc 705. A secondary sun gear 706 is formed downwardly on the planetary disc 705 and matches the planetary gear 9.

[0087] Further optimizing the planetary carrier, a sun hole 701 sequentially extends through the planetary disk 705 and the secondary sun gear 706. The primary purpose of this sun hole 701 is to provide centering and prevent misalignment. To further reduce friction during transmission, a sun step 702 is provided above the sun hole 701. The area of ​​this step 702 is smaller than that of the primary sun gear 8 or the secondary sun gear 706.

[0088] The planetary carrier is further optimized, and the planetary disc 705 forms a protruding primary gear shaft 704 that matches the planetary gear 9; in order to further reduce the friction area generated by the planetary gear 9 during the transmission process, a primary step 703 is set between the primary gear shaft 704 and the planetary disc 705, and the area of ​​the primary step 703 is smaller than the area of ​​the planetary gear 9.

[0089] In order to ensure that the planetary gears 9 are evenly stressed during the transmission process, the number of the primary gear shafts 704 is more than two, and the primary gear shafts 704 are evenly distributed on the same pitch circle, which is concentric with the sun hole 701.

[0090] Then according to the above principle of action, refer to Figure 10 、 Figure 11 Combine Figure 5 The rotating disk 5 is further described in detail as follows:

[0091] A sealed inner groove 504 is provided on the rotating disk 5, and the sealed inner groove 504 includes a separation groove 5043 and a centering hole 5042. The centering hole 5042 is set at the center of the rotating disk 5, and the centering hole 5042 is laterally connected to the separation groove 5043; the main purpose of the centering hole 5042 is to be able to always make circular motion around the center sleeve 6 without offset.

[0092] Furthermore, a sealing step 5041 connected to the centering hole 5042 and the separation groove 5043 is provided below the sealing inner groove 504;

[0093] In order to ensure good sealing between the valve disc 3 and the rotating disc 5, the end surface flatness of the sealing step 5041 is set to 0-8 μm. Generally, the end surface flatness of the sealing step 5041 is basically within 0-3 μm by an automatic grinding machine.

[0094] In order to ensure that the planetary reducer is coaxial with the rotating disk 5, a center positioning shaft 501 coaxial with the centering hole 5042 is provided above the sealing inner groove 504;

[0095] To facilitate the connection between the output of the planetary reducer and the rotating disk 5, a secondary gear shaft 502 is provided above the sealed inner groove 504 to mate with the planetary gears 9. There are two or more secondary gear shafts 502, all evenly distributed on the same pitch circle, which is concentric with the central positioning axis 501. Therefore, the rotating disk 5 can also be considered part of the planetary reducer, and the connection is a power connection.

[0096] Finally, according to the above action principle, refer to Figure 5 、 Figure 6 、 Figure 14 、 Figure 15 Combine Figure 1 The housing assembly 2 is further described in detail as follows:

[0097] The housing assembly 2 includes an inner gear ring 202, a rotary valve chamber 201, a flange 206, and a motor housing 2A. The lower portion of the inner gear ring 202 is connected to the rotary valve chamber 201, and the outer wall of the rotary valve chamber 201 is connected to the flange 206. The upper portion of the inner gear ring 202 is connected to the motor housing 2A.

[0098] The motor housing 2A includes a motor mounting cavity 203A and an air intake connection cover 11 . The air intake connection cover 11 is inserted into the motor mounting cavity 203A and is sealed in the motor mounting cavity 203A. The motor mounting cavity 203A is above the inner gear ring 202 and is connected to the inner gear ring 202 .

[0099] In order to further explain the sealing connection method of the air intake connection cover 11 and the motor installation cavity 203A in this embodiment: first, combine Figure 14 and Figure 15 The air inlet connection cover 11 is described as follows:

[0100] The air inlet connection cover 11 includes a sealing hole 1104 that fits within the outer wall of the motor mounting cavity 203A. A sealing cover plate 1105, connected to the sealing hole 1104, is located above the sealing hole 1104. The sealing cover plate 1105 is provided with an upper sealing groove 1103 and an upwardly protruding C-shaped connection port 14, which communicates with the sealing hole 1104. A glue trough 1101 is located on the sealing cover plate 1101, flanking the C-shaped connection port 14. The bottom of the glue trough 1101 is provided with a wire lead hole. This lead hole allows the motor leads to pass through the lead hole. After the motor leads are routed out, epoxy resin glue or other environmentally friendly, high- and low-temperature-resistant glue is injected into the glue trough 1101. After a certain period of time, the glue solidifies within the glue trough 1101. This glue sealing of the lead hole prevents leakage of compressed air, ensuring the stability and efficiency of oxygen production.

[0101] Secondly, a fixing hole 1102 matching the sealing screw hole 208 is provided on the outer circle of the sealing cover hole 11.

[0102] Secondly, combined Figure 5 and Figure 6 The motor mounting cavity 203A in the housing assembly 2 is further described as follows:

[0103] More than two sealing screw holes 208 are formed on the circular outer wall of the motor installation cavity 203A and are evenly distributed.

[0104] The upper sealing groove 1103 has a sealing gasket 15 built into it. The air intake connection cover 11 is fitted with the end surface of the motor mounting cavity 203A via the sealing gasket 15 built into the upper sealing groove 1103. Corresponding screws pass through the fixing holes 1101 and the sealing screw holes to press the air intake connection cover 11 onto the motor mounting cavity 203. This achieves a sealed connection of the housing assembly 2.

[0105] In order to allow compressed air to quickly enter the interior of the housing assembly 2, a guide groove 204A is provided on the inner wall of the motor installation cavity 203A and is connected to the inner wall of the motor installation cavity 203A. The number of the guide grooves 204A is more than two.

[0106] The main purpose of placing the motor 10 inside the motor mounting cavity 203A is that after the compressed air enters the C-port connecting pipe 14, it flows directly through the motor 10, thus rapidly cooling the motor 10. Figure 16As shown: Under an air pressure of 0.2~0.3MPa, the temperature of the motor 10 drops from 123° to 81° after air cooling. Example

[0107] The difference from the first embodiment is that the motor 10 is a brushless motor or a stepper motor. Considering the cost, performance, and reasonable life, the stepper motor is preferred in the second embodiment. The life of the stepper motor is longer than that of the brush motor. Under reasonable load conditions, it can basically reach more than 5000 hours. Secondly, the stepper motor can provide timely feedback on the position of the rotating disk 5. The feedback device is set as follows:

[0108] A magnetic conductor, such as ferrite or neodymium iron boron, is embedded in the outer wall of the sealed inner groove 504 on the rotating disk 5. A Hall effect sensor is then installed at the position corresponding to either connector A 12 or connector B 13, or one Hall effect sensor is installed at each of connectors A 12 and B 13. The position of the first magnetic conductor detected by the Hall effect sensor is used as the starting point to calculate the number of pulses required for one rotation of the rotating disk 5. The position of the rotating disk 5 is calculated based on the number of steps the stepper motor has taken. The calculation is as follows: Current angle = (Number of operating pulses / Number of pulses per rotation) × 360°. Example

[0109] What is different from the first embodiment is that the housing assembly 2 includes an inner gear ring 202, a rotary valve chamber 201, a flange 206, and a rotor housing 2B; the arrangement and placement of the inner gear ring 202, the rotary valve chamber 201, and the flange 206 are the same as those in the first embodiment.

[0110] Another difference is that the motor 10 is divided into a coil 10A and a rotor assembly.

[0111] Reference Figure 7 , combined with Figure 2 As shown, the rotor housing 2B in this third embodiment is further described as follows:

[0112] The rotor housing 2B includes a rotor mounting cavity 203B, which is located above and connected to the inner ring gear 202. A C-connecting port 14 is located above the rotor mounting cavity 203B and communicates with the C-connecting port 14. The most significant difference between the rotor housing 2B and the motor housing 2A is the lack of an air inlet connection cover 11; instead, the C-connecting port 14 is directly connected to the rotor mounting cavity 203B. This integrated design reduces installation and manufacturing costs. For example, the need for glue potting and sealing gaskets 15 reduces the need for a mold. Furthermore, two sealing points are eliminated.

[0113] The rotor installation cavity 203B contains a rotor assembly, and the outer wall of the cavity is provided with a coil 10A.

[0114] The rotor assembly includes a magnetic ring 10B, a rotor support plate 10C, a bearing 10D, and a rotating shaft 10E;

[0115] To further elaborate on the combination of the rotor assembly in Example 3, the rotating shaft 10E and the magnetic ring 10B are integrated through an injection molding process. The rotating shaft 10E is located at the center of the magnetic ring 10B. A bearing 10E is fixed to the top and bottom of the rotating shaft 10E. The bearing 10E can be a sliding bearing made of a wear-resistant self-lubricating material, or a ball bearing. The bearing 10E is fixed to the center of the rotor support plate 10C, and the rotor support plate 10C is fixed to the inner wall of the rotor mounting cavity 203B. To allow compressed air to pass quickly and increase the flow area, multiple guide holes are provided on the rotor support plate 10C, or multiple guide hole slots 204B are provided in the rotor mounting cavity 203B.

[0116] Compared with the first embodiment, if the power of the coil is the same, the cooling effect of the third embodiment is slightly worse than that of the first embodiment, and the temperature after cooling is 91°.

[0117] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made based on the essence of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. An oxygen separation valve, comprising a valve base (1) and a housing assembly, characterized in that: It also includes a drive assembly, a valve disc (3), a rotating disc (5), a first-stage sun gear (8), a planetary assembly, a silencer cover (4), and a silencer foam plate. The housing assembly comprises an inner gear ring (202), a rotary valve chamber (201), a flange (206), a motor housing (2A) or a rotor housing (2B); The lower portion of the inner gear ring (202) is connected to the rotary valve cavity (201), and the outer wall of the rotary valve cavity (201) is connected to the flange (206); The upper portion of the inner gear ring (202) is connected to the motor housing (2A) or the rotor housing (2B); The output connection portion of the drive assembly is fixedly connected to the first-stage sun gear (8); The primary sun gear (8) is connected to the planetary assembly as an input part; The drive assembly is a motor (10) or is composed of a stator and a rotor assembly; The motor (10) is built into the motor housing (2A), or the stator is mounted on the outer wall of the rotor housing (2B), and the rotor assembly is built into the rotor housing (2B); The primary sun gear (8) and the planetary assembly are built into the inner gear ring (202), the lower portion of the planetary assembly is connected to the rotating disk (5), and the rotating disk (5) is built into the rotary valve cavity (201); The valve disc (3) is coaxially fixed on the valve base (1); The housing assembly is coaxially connected to the valve base (1) and the silencer cover (4) in sequence through the flange (206) and fixed together; The sound-absorbing foam plate is placed in the sound-absorbing groove (109) of the valve base (1); The planetary assembly comprises a planetary carrier (7) and a planetary gear (9) matched with the primary sun gear (8) and the inner ring gear (202); The planetary carrier (7) is provided with a planetary disk (705), the center of the planetary disk (705) is provided with a sun hole (701), and the planetary disk (705) forms a convex secondary sun gear (706) that matches the planetary gear (9) downwardly. The sun hole (701) sequentially passes through the planetary disk (705) and the secondary sun gear (706); The planetary disc (705) forms a primary gear shaft (704) protruding upwards and matching the planetary gear (9); The number of the primary gear shafts (704) is more than two, and the primary gear shafts (704) are evenly distributed on the same pitch circle, and the pitch circle is concentric with the sun hole (701); The rotating disk (5) is provided with a sealed inner groove (504), the sealed inner groove (504) comprising a separation groove (5043) and a centering hole (5042), the centering hole (5042) being arranged at the center of the rotating disk (5), the centering hole (5042) being laterally connected to the separation groove (5043); A sealing step (5041) connected to the centering hole (5042) and the separation groove (5043) is provided below the sealing inner groove (504); The end surface flatness of the sealing step (5041) is 0-8 μm; A central positioning shaft (501) coaxial with the centering hole (5042) is provided above the sealing inner groove (504); A secondary gear shaft (502) matching the planetary gear (9) is provided above the sealed inner groove (504). The number of the secondary gear shafts (502) is more than two and they are evenly distributed on the same pitch circle, which is concentric with the central positioning axis (501).

2. The oxygen production separation valve according to claim 1, characterized in that: The center of the valve base (1) is provided with a central shaft hole (104) matched with the central shaft sleeve (6), and the two sides of the central shaft hole (104) are provided with an A hole positioning circle (102) and a B hole positioning circle (103) of the same size and symmetrical position; The central axis hole (104) is in communication with the muffler groove (109); An A connection port (12) and a B connection port (13) of the same shape are respectively provided below the A hole positioning circle (102) and the B hole positioning circle (103).

3. The oxygen production separation valve according to claim 2, characterized in that: The center of the valve disc (3) is provided with an exhaust port (304) matched with the central shaft sleeve (6), and two sides of the exhaust port (304) are provided with an A port (302) and a B port (303) of the same size and symmetrical position. The position of the A port (302) corresponds to the A hole positioning circle (102), and the position of the B port (303) corresponds to the B hole positioning circle (103); A downwardly protruding A positioning hole column (305) and a downwardly protruding B positioning hole column (306) are formed below the A port (302) and the B port (303), respectively; The valve disc (3) is embedded and sealed in the A hole positioning circle (102) and the B hole positioning circle (103) on the valve base (1) through the A positioning hole column (305) and the B positioning hole column (306).

4. The oxygen production separation valve according to claim 3, characterized in that: The end surface of the valve disc (3) is provided with a sealing plane (301), and the sealing plane (301) is respectively connected to the A port (302), the B port (303), and the exhaust port (304); The flatness of the sealing plane (301) is 0-8 μm.

5. The oxygen production separation valve according to claim 1, characterized in that: The motor housing (2A) comprises a motor mounting cavity (203A) and an air intake connection cover (11), wherein the air intake connection cover (11) is inserted into the motor mounting cavity (203A) and is sealed in the motor mounting cavity (203A); The motor installation cavity (203A) is above the inner gear ring (202) and is connected to the inner gear ring (202).

6. The oxygen production separation valve according to claim 5, characterized in that: A guide groove (204A) is provided on the inner wall of the motor installation cavity (203A) and is communicated with the inner wall of the motor installation cavity (203A).

7. The oxygen production separation valve according to claim 5, characterized in that: The air inlet connection cover (11) comprises a sealing cover hole (1104) matched with the outer wall of the motor installation cavity (203A), a sealing cover plate (1105) connected to the sealing cover hole (1104) is provided above the sealing cover hole (1104), an upper sealing groove (1103) is provided on the sealing cover plate (1105), and the sealing cover plate (1105) is provided with an upwardly protruding C-connecting port (14), and the C-connecting port (14) is communicated with the sealing cover hole (1104); A glue pouring groove (1101) is provided on the sealing cover plate (1105) and on the side of the C connection port (14), and a lead hole is provided at the bottom of the glue pouring groove (1101).

8. The oxygen production separation valve according to claim 1, characterized in that: The rotor housing (2B) comprises a rotor installation cavity (203B), the rotor installation cavity (203B) is above the inner gear ring (202) and is connected to the inner gear ring (202), a C-connecting port (14) is provided above the rotor installation cavity (203B), and the rotor installation cavity (203B) is in communication with the C-connecting port (14).

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