Annular face valve for a compressor

Abstract

The application relates to the technical field of valves, and particularly discloses a ring-shaped surface valve for a compressor, which comprises a valve seat and a plurality of ring-shaped valve sheets; the valve seat comprises an air inlet valve seat and an air outlet valve seat which are coaxially arranged and fixedly assembled; the ring-shaped surface valve is based on the overall improved design of the ring-shaped valve sheets, the two-stage composite structure and the airflow guiding design are adopted, the impact deformation and wear of the valve sheets caused by vibration are reduced, the impact and wear of the valve sheets caused by airflow are reduced, self-adaptive compensation sealing and active repair sealing can be realized, the closing sealing reliability of the ring-shaped surface valve is guaranteed, and the service life is prolonged.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and specifically proposes an annular face valve for compressors. Background Technology

[0002] The annular face valve for compressors is a valve device in compressors that controls the entry and exit of gas from the cylinder. It mainly consists of multiple concentrically arranged valve plates that control the opening and closing of the gas passage. When the compressor is working, the reciprocating motion of the cylinder piston alternately realizes the intake and exhaust of gas, and both intake and exhaust are independently and unidirectionally controlled by an annular face valve. During the intake phase, the pressure inside the cylinder is lower than the pressure on the intake side, the valve opens, and gas enters the cylinder. During the exhaust phase, the pressure inside the cylinder is higher than the pressure on the intake side, and gas is discharged from the cylinder.

[0003] The annular face valve is essentially a one-way control valve, passively controlled by differential pressure. The sealing surface of the valve disc is also the windward side. When gas flows, the sealing surface of the valve disc is always directly subjected to the high-pressure flow impact of the airflow, which will cause deformation of the valve disc and wear of the sealing surface, directly affecting the sealing reliability and service life of the annular face valve. Specifically, this manifests in the following ways: 1. Gases usually contain small solid particles such as dust impurities. Accompanied by high-speed airflow, these particles will produce an impact effect on the sealing surface of the valve disc, similar to sandblasting, causing randomly distributed micro-pits, pits, scratches, and even grooves to appear on the sealing surface of the valve disc. This seriously affects the fit between the valve disc and the valve seat, causing the valve to fail to seal when closed.

[0004] 2. The valve plate opens and closes synchronously at high frequency during the alternating operation of the compressor's intake and exhaust. The reciprocating movement of the valve plate during opening and closing itself is a high-frequency vibration. During vibration, high-frequency impact and friction will occur between the valve plate and the mating seal. When the airflow is highly unstable, abnormal impact wear is more likely to occur. The valve plate is also prone to plastic deformation due to vibration and impact. Springs and other elastic return components may also fail due to high-frequency vibration.

[0005] 3. High-speed airflow itself can also cause cavitation wear on the valve plate. If the gas contains corrosive components, it will also cause corrosion wear on the valve plate. Summary of the Invention

[0006] To address the aforementioned problems, the present invention provides an annular face valve for compressors, which solves the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention employs the following technical solution: an annular face valve for a compressor, comprising a valve seat and a plurality of annular valve plates; the valve seat includes an intake valve seat and an exhaust valve seat coaxially and fixedly assembled; both the intake valve seat and the exhaust valve seat have multiple sets of concentrically arranged air passages, and the air passages of the intake valve seat and the exhaust valve seat are radially offset; the plurality of annular valve plates are coaxially arranged between the intake valve seat and the exhaust valve seat, and are concentrically arranged; the plurality of annular valve plates are used to correspondingly and tightly seal against the plurality of air passages of the intake valve seat; the annular valve plate includes a The system consists of a primary reset layer, a secondary reset layer, and an isolation ring. The isolation ring is made of flexible material and is fixed between the primary and secondary reset layers. The secondary reset layer is slidably mounted on the primary reset layer and the exhaust valve seat along the valve seat axial direction. The primary and secondary reset layers can independently provide sealing elasticity and work together to seal the secondary reset layer against the air passage of the intake valve seat to achieve a closed state. During air intake, the air pressure simultaneously overcomes the sealing elasticity of the primary and secondary reset layers, causing the secondary reset layer to separate from the intake valve seat. The air passages of the intake valve seat and the exhaust valve seat are then connected, resulting in an open state.

[0008] Preferably, the primary reset layer includes a rigid ring and a plurality of compression springs distributed circumferentially along the rigid ring; the two ends of the compression springs are clamped and contacted on the rigid ring and the exhaust valve seat.

[0009] Preferably, the secondary reset layer includes a flexible ring; an isolation ring is fixed between the flexible ring and the rigid ring; multiple guide rods are circumferentially fixed on the flexible ring, the multiple guide rods pass through the isolation ring and are slidably mounted on the rigid ring and the exhaust valve seat; a spring sleeve is fixed on each guide rod, the spring sleeve is located between the rigid ring and the exhaust valve seat, and the spring sleeve and the exhaust valve seat are in a tight fit.

[0010] Preferably, the inner and outer rings of the isolation ring are engaged with both the rigid ring and the flexible ring in a snap-fit ​​configuration.

[0011] Preferably, the rigid ring has multiple slots distributed circumferentially; the isolation ring engages with the multiple slots.

[0012] Preferably, the flexible ring has a V-shaped cross-section, and the isolation ring is in close contact with the V-shaped concave surface of the flexible ring; the V-shaped convex surface of the flexible ring is used to make tight contact and seal with the edge of the air passage of the intake valve seat.

[0013] Preferably, the flexible ring has multiple circumferentially distributed guide grooves on its V-shaped convex surface, and the guide grooves extend in the direction of the V-shaped cross-sectional profile of the flexible ring.

[0014] Preferably, the end face of the intake valve seat facing the exhaust valve seat and located at the edge of each group of air passages is covered and fixed with a sealing ring that mates with the corresponding annular valve plate; the sealing ring is tightly sealed and fitted with the V-shaped convex surface of the flexible ring, and the sealing ring is sealed and engaged with the guide groove.

[0015] Preferably, the annular face valve further includes an active component mounted on the valve seat for actively pushing multiple annular valve discs to switch to the open state.

[0016] Preferably, the active component includes a central column fixed on the intake valve seat, a return spring fitted on the central column, a drive component slidably mounted on the intake valve seat along the axial direction, the two ends of the return spring being fixed to the central column and the drive component respectively, and the drive component being able to pass through the air passage of the intake valve seat and synchronously push multiple annular valve plates.

[0017] The above technical solution has the following advantages or beneficial effects: This invention provides an annular face valve for a compressor. The annular valve plate consists of a primary reset layer and a secondary reset layer, possessing both the integrity of a joint sealing mechanism and the independence of an independent response, enabling adaptive compensation-type air passage sealing. In the annular valve plate, the assembly and cooperation between the rigid ring, flexible ring, and isolation ring ensures the rigid foundation and overall assembly strength of the structure. The sliding cooperation between the guide rod and the rigid ring and the exhaust valve seat enhances the vibration guidance of the annular valve plate in the axial direction of the valve seat, suppressing vibration and oscillation. The flexible contact between the flexible ring and the sealing ring, and the isolation setting of the isolation ring between the rigid ring and the flexible ring, significantly buffer and dampen vibration. The flexible ring avoids high-frequency rigid collisions, thus suppressing plastic deformation and maintaining the integrity of the sealing surface. Furthermore, the flexible ring sealing surface, facing the airflow, features a V-shaped cross-section design, effectively guiding the airflow from the intake duct to the exhaust ducts on both sides. The circumferentially distributed guide grooves further segment and guide the airflow, ensuring its uniform dispersion on the flexible ring. Especially when facing turbulent flow, this design distributes the airflow impact force more evenly across the flexible ring surface, preventing excessive localized wear. The sealing ring, located on the leeward side, and through its interlocking seal with the flexible ring, effectively fills and seals the worn surface of the flexible ring, enhancing its sealing performance.

[0018] In summary, the annular face valve provided by this invention is based on an overall improved design of the annular valve plate. Through a two-stage composite structure and airflow guidance design, it reduces the impact deformation and wear of the valve plate caused by vibration, and also reduces the impact wear of airflow on the valve plate. It can perform adaptive compensation sealing and active repair sealing, ensuring the reliability of the annular face valve's closing seal and extending its service life. Attached Figure Description

[0019] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings, which are not intentionally drawn to scale; the focus is on illustrating the spirit of the invention.

[0020] Figure 1 This is a three-dimensional structural diagram of an annular face valve for a compressor.

[0021] Figure 2 This is a top view of an annular face valve used in compressors.

[0022] Figure 3 yes Figure 2 Sectional view of AA.

[0023] Figure 4 yes Figure 3 A magnified view of a section at point B in the middle.

[0024] Figure 5 It is a three-dimensional sectional view of multiple annular valve plates assembled inside the valve seat.

[0025] Figure 6 It is a 3D view of the intake valve seat with a sealing ring installed.

[0026] Figure 7 This is a 3D view of the intake valve seat without the sealing ring installed.

[0027] Figure 8 It is a three-dimensional structural diagram of three concentrically distributed sealing rings.

[0028] Figure 9 This is a three-dimensional structural diagram of the exhaust valve seat.

[0029] Figure 10 This is a three-dimensional sectional view of the annular valve disc (minimum size).

[0030] Figure 11 This is a three-dimensional structural diagram of the first-level reset layer.

[0031] Figure 12 This is a three-dimensional structural diagram of the secondary reset layer.

[0032] Figure 13 This is a 3D structural diagram of the isolation ring.

[0033] In the diagram: 1. Intake valve seat; 11. Intake air passage; 12. Sealing ring; 121. Air passage hole; 13. Guide post; 2. Exhaust valve seat; 21. Valve plate compartment; 211. Compression spring chamber; 22. Exhaust air passage; 23. No. 1 guide hole; 3. Annular valve plate; 31. Rigid ring; 311. Slot; 312. No. 2 guide hole; 32. Flexible ring; 321. Guide groove; 33. Isolation ring; 34. Compression spring; 35. Guide rod; 36. Spring sleeve; 4. Active assembly; 41. Center post; 42. Return spring; 43. Drive component; 431. Sliding sleeve; 432. Push claw. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] like Figure 1 and Figure 2 As shown, an annular face valve for a compressor includes a valve seat and three annular valve plates 3, and an active component 4 mounted on the valve seat. The valve seat includes an intake valve seat 1 and an exhaust valve seat 2, both of which are disc-shaped. The intake valve seat 1 and the exhaust valve seat 2 are coaxially fixed by bolts. The three annular valve plates 3 are concentrically arranged and coaxially mounted between the intake valve seat 1 and the exhaust valve seat 2. The annular face valve is a valve that uses pressure difference to achieve unidirectional control of airflow. The three annular valve plates 3 are used to control the airflow. When the air pressure on the intake valve seat 1 side is greater than the air pressure on the exhaust valve seat 2 side, the annular valve plates 3 can be passively opened, and the valve is in the open state. The active component 4 is used to actively drive the annular valve plates 3 to move to the open state, thereby achieving the purpose of actively opening the valve. The purpose of setting the active component 4 is to reduce the starting load by actively opening the valve when the compressor starts. After the compressor starts working stably, the annular face valve is passively opened or closed with the compressor.

[0037] like Figure 1 , Figure 3 , Figure 5 , Figure 7 and Figure 9 As shown, in this invention, the intake valve seat 1 has three sets of concentrically arranged intake passages 11, and the exhaust valve seat 2 also has three sets of concentrically arranged exhaust passages 22. The central circular hole can also serve as the exhaust passage 22. The number of the three sets of intake passages 11 and the three sets of exhaust passages 22 are three, six, and nine respectively. In each set, multiple intake passages 11 or exhaust passages 22 are evenly distributed circumferentially. The three sets of intake passages 11 and the three sets of exhaust passages 22 are staggered in the radial direction. The exhaust valve seat 2 has a valve plate compartment 21, and three annular valve plates 3 are arranged in the valve plate compartment 21. The three annular valve plates 3 are used to seal against the three sets of intake passages 11 one by one. Correspondingly, the three annular valve plates 3 are evenly distributed in the same radial direction relative to the three sets of exhaust passages 22. Obviously, when the annular valve plates 3 are separated from the intake passages 11, the intake passages 11 and the exhaust passages 22 are in a connected state, and the valve is opened.

[0038] like Figure 9 , Figure 10 and Figure 13 As shown, the valve plate compartment 21 has multiple compression spring cavities 211 and multiple first guide holes 23 corresponding to each annular valve plate 3. The multiple compression spring cavities 211 and multiple first guide holes 23 are evenly distributed in the same circumference around the central axis of the exhaust valve seat 2. The larger the radius of the annular valve plate 3, the more compression spring cavities 211 and first guide holes 23 are opened to cooperate with it. The annular valve plate 3 includes a primary reset layer, a secondary reset layer and an isolation ring 33. The isolation ring 33 has a circular structure and is integrally injection molded from rubber material.

[0039] like Figure 4 , Figure 5 and Figure 11 As shown, the primary reset layer includes a rigid ring 31 and multiple compression springs 34; the multiple compression springs 34 are placed in corresponding multiple compression spring cavities 211; the rigid ring 31 has a circular ring structure, and multiple slots 311 and multiple second guide holes 312 are evenly distributed on the rigid ring 31 along the circumference.

[0040] like Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 12 and Figure 13As shown, the secondary reset layer includes a flexible ring 32 with a circular structure, multiple guide rods 35, and multiple spring sleeves 36. The flexible ring 32 is made of spring steel. Both the rigid ring 31 and the isolation ring 33 have annular grooves on their inner and outer circular sidewalls. The isolation ring 33 has corresponding engagement rings embedded in the two annular grooves on the rigid ring 31, and the flexible ring 32 also has corresponding engagement rings embedded in the two annular grooves on the isolation ring 33. That is, the inner and outer rings of the isolation ring 33 are engaged with the rigid ring 31 and the flexible ring 32 in a snap-fit ​​fit to improve the assembly strength between the isolation ring 33 and the rigid ring 31 and the flexible ring 32. The isolation ring 33 engages with the groove 311 of the rigid ring 31 in a snap-fit ​​fit to enhance the strength of the isolation ring 33. 3. Assembly strength of the rigid ring 31 in the circumferential direction; the cross section of the flexible ring 32 is V-shaped, the isolation ring 33 is in close contact with the V-shaped concave surface of the flexible ring 32, and multiple guide grooves 321 are evenly distributed around the circumference on the V-shaped convex surface of the flexible ring 32. The guide grooves 321 extend in the V-shaped cross section contour direction of the flexible ring 32. The end face of the intake valve seat 1 facing the exhaust valve seat 2 and located at the edge of each group of intake air passages 11 are covered and fixed with sealing rings 12 that cooperate with the corresponding annular valve plates 3. The sealing rings 12 are integrally formed rubber rings, and the sealing rings 12 are provided with air passage holes 121 to prevent the intake air passages 11 from being blocked. The sealing rings 12 and the V-shaped convex surface of the flexible ring 32 are tightly sealed and fitted together, and the sealing rings 12 and the guide grooves 321 are sealed and engaged. Multiple guide rods 35 are welded at one end to the V-shaped concave surface of the flexible ring 32. The multiple guide rods 35 pass through the isolation ring 33 and slide through and cooperate with multiple second guide holes 312 one by one. The guide rods 35 are also slidably installed in the corresponding first guide hole 23. The multiple guide rods 35 realize the axial connection between the flexible ring 32, the isolation ring 33 and the rigid ring 31, which further enhances the overall structure and the strength of the circumferential fit installation. Multiple spring sleeves 36 are fitted and fixedly welded to the multiple guide rods 35 one by one. The spring sleeves 36 are located in the valve plate chamber 21 and are made of spring steel. When the intake valve seat 1 and the exhaust valve seat 2 are fastened together, the compression spring 34 and the spring sleeve 36 generate preload force, so that the compression spring 34 is compressed and its two ends are clamped between the rigid ring 31 and the compression spring cavity 211, while the spring sleeve 36 is bent and pressed against the inner end face of the valve plate chamber 21.

[0041] In the annular valve plate 3, the rigid ring 31 can be made of existing rigid alloy materials, serving as the rigid skeleton of the annular valve plate 3 and forming a stable structural foundation. In the first-stage reset layer, the compression spring 34 elastically supports the rigid ring 31 and indirectly acts on the flexible ring 32 through the isolation ring 33. In the second-stage reset layer, the elastic force of the spring sleeve 36 acts on the flexible ring 32 through the guide rod 35, thus jointly providing elastic force, so that the flexible ring 32 and the sealing ring 12 form a tight sealing contact. The flexible ring 32 and the rigid ring 31 are assembled and connected through the isolation ring 33, possessing integrity. However, the first-stage and second-stage reset layers allow the rigid ring 31 and the flexible ring 32 to simultaneously possess independence. When the response of the first-stage reset layer is insufficient to tightly seal the flexible ring 32 against the sealing ring 12, the second-stage reset layer can serve as a supplement to ensure the tight sealing force of the flexible ring 32.

[0042] like Figure 1 , Figure 2 and Figure 3 As shown, the annular face valve also includes an active component 4 mounted on the valve seat for actively pushing multiple annular valve discs 3 to switch to the open state. A cylindrical guide post 13 is integrally formed on the outer end face of the intake valve seat 1. The active component 4 includes a central post 41 with a screw section. The guide post 13 has a thread that mates with the screw section. The central post 41 is installed in the guide post 13 through the screw section thread. A return spring 42 is fitted on the central post 41, with one end of the return spring 42 welded to the central post 41. A drive component 43 is assembled on the guide post 13. The drive component 43 includes a sliding sleeve 431 that is keyed and slidably mounted on the guide post 13 and three pushers 432 that are evenly distributed circumferentially and welded to the sliding sleeve 431. The other end of the return spring 42 is fixed inside the sliding sleeve 431. Each pusher 432 extends into three sets of intake air passages 11. The active component 4 also needs to be used with an existing actuator. The actuator can be a linear electric actuator. It should be noted that the actuator is not shown in the attached drawings. The sliding sleeve 431 can be fixed to the output end of the actuator.

[0043] It is worth noting that in the entire compressor system, annular face valves are generally installed at both the intake and exhaust ends. Reciprocating compressors rely on the alternating opening and closing of the intake and exhaust passages to achieve the cyclic operation of intake and exhaust. That is, when intake is performed, the annular face valve of the intake passage is in the open state, while the annular face valve of the exhaust passage is in the closed state, and vice versa when exhaust is performed. However, whether intake or exhaust is performed, the annular face valve is a one-way flow control, and the airflow always flows from the intake passage 11 to the exhaust passage 22.

[0044] When the compressor starts, the actuator connected to the active component 4 actively pushes the drive component 43, compresses the return spring 42, and the pusher 432 extends further into the intake valve seat 1. The three pushers 432 simultaneously contact the flexible rings 32 of the three annular valve plates 3 and continue to push, causing the flexible rings 32 to separate from the sealing ring 12, the intake passage 11 to open actively, and the annular valve to be in the open state. When the compressor is working stably, the active component 4 withdraws. The annular valve plate 3 opens passively due to the pressure difference. That is, when the pressure on the intake valve seat 1 side is greater than the pressure on the exhaust valve seat 2 side, it overcomes the elastic force of the compression spring 34 and the spring sleeve 36, causing the annular valve plate 3 to be actively pushed open, and the annular valve to open. Conversely, it is in the closed state. When the compressor is in the alternating cycle of intake and exhaust, the annular valve is in a synchronous high-frequency opening and closing state under the pressure difference drive. The high-frequency opening and closing of the annular valve based on function is essentially a regular forced vibration. Gas turbulence will also cause additional and harmful high-frequency flutter to the annular valve plate 3. In this invention, the assembly and fit between the rigid ring 31, the flexible ring 32, and the isolation ring 33 ensures the rigidity of the structure and the strength of the assembly and fit. The sliding fit between the guide rod 35, the rigid ring 31, and the exhaust valve seat 2 strengthens the vibration guidance of the annular valve plate 3 in the axial direction of the valve seat, suppressing vibration and oscillation. The flexible contact between the flexible ring 32 and the sealing ring 12, and the isolation setting of the isolation ring 33 between the rigid ring 31 and the flexible ring 32, significantly buffer and dampen the vibration, avoiding high-frequency rigid collision contact, thereby suppressing the plastic deformation of the flexible ring 32 and maintaining the integrity of the sealing surface. In addition, the sealing surface of the flexible ring 32 is a straight surface. The windward side of the airflow adopts a V-shaped cross-section design, which can effectively guide the airflow from the intake duct 11 to the exhaust ducts 22 on both sides. At the same time, the circumferentially distributed guide grooves 321 further divide and guide the airflow, so that the airflow can be evenly distributed on the flexible ring 32. Especially when facing turbulence, it can distribute the impact force of the airflow more evenly on the surface of the flexible ring 32, avoiding excessive local wear. The sealing ring 12 is located on the leeward side, and the sealing ring 12 can fully fill and seal the worn surface of the flexible ring 32 through the interlocking sealing contact with the flexible ring 32, which is equivalent to the indirect repair of the worn sealing surface of the flexible ring 32 to enhance the sealing performance.

[0045] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0046] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a manner common to the art; any possible variations and modifications made by those skilled in the art without departing from the technical solution of the present invention, or equivalent embodiments with equivalent changes, do not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. An annular face valve for a compressor, characterized in that, include: The valve seat includes an intake valve seat and an exhaust valve seat that are coaxially and fixedly assembled; both the intake valve seat and the exhaust valve seat have multiple sets of concentrically arranged air passages, and the air passages of the intake valve seat and the air passages of the exhaust valve seat are radially staggered. It also includes multiple annular valve plates, coaxially arranged between the intake valve seat and the exhaust valve seat, and concentrically positioned; the multiple annular valve plates are used to correspondingly and tightly seal against multiple sets of air passages on the intake valve seat; the annular valve plates include a primary reset layer, a secondary reset layer, and an isolation ring, the isolation ring being made of flexible material and fixed between the primary reset layer and the secondary reset layer; the secondary reset layer is slidably installed along the valve seat axial direction on the primary reset layer and the exhaust valve seat; the primary reset layer and the secondary reset layer can independently provide sealing elasticity, and together they are used to seal the secondary reset layer against the air passages of the intake valve seat to achieve a closed state; during intake, the air pressure simultaneously overcomes the sealing elasticity of the primary reset layer and the secondary reset layer, the secondary reset layer separates from the intake valve seat, and the air passages of the intake valve seat and the exhaust valve seat are connected, thus being in an open state; The primary reset layer includes a rigid ring and multiple compression springs distributed circumferentially along the rigid ring; the two ends of the compression springs are clamped and contact the rigid ring and the exhaust valve seat; The secondary reset layer includes a flexible ring; an isolation ring is fixed between the flexible ring and the rigid ring; multiple guide rods are circumferentially fixed on the flexible ring, and the multiple guide rods pass through the isolation ring and are slidably installed on the rigid ring and the exhaust valve seat; a spring sleeve is fixed on each guide rod, the spring sleeve is located between the rigid ring and the exhaust valve seat, and the spring sleeve and the exhaust valve seat are in a tight fit. The flexible ring has a V-shaped cross-section, and the isolation ring is in close contact with the V-shaped concave surface of the flexible ring; the V-shaped convex surface of the flexible ring is used to make tight contact and seal with the edge of the air passage of the intake valve seat.

2. The annular face valve for a compressor according to claim 1, characterized in that: The inner and outer rings of the isolation ring are engaged with the rigid and flexible rings in a snap-fit ​​configuration.

3. The annular face valve for a compressor according to claim 1, characterized in that: The rigid ring has multiple slots distributed circumferentially; the isolation ring engages with the multiple slots.

4. The annular face valve for a compressor according to claim 1, characterized in that: The flexible ring has multiple circumferentially distributed guide grooves on its V-shaped convex surface, and the guide grooves extend in the direction of the V-shaped cross-sectional profile of the flexible ring.

5. The annular face valve for a compressor according to claim 4, characterized in that: The end face of the intake valve seat facing the exhaust valve seat and located at the edge of each group of air passages is covered and fixed with a sealing ring that mates with the corresponding annular valve plate; the sealing ring and the V-shaped convex surface of the flexible ring are tightly sealed together, and the sealing ring and the guide groove are sealed and engaged.

6. The annular face valve for a compressor according to claim 1, characterized in that: The annular face valve also includes an active component mounted on the valve seat for actively pushing multiple annular valve discs to switch to the open state.

7. The annular face valve for a compressor according to claim 6, characterized in that: The active component includes a central column fixed on the intake valve seat, a return spring mounted on the central column, and a drive component slidably mounted on the intake valve seat along the axial direction. The two ends of the return spring are fixed to the central column and the drive component, respectively. The drive component can pass through the air passage of the intake valve seat and synchronously push multiple annular valve plates.

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