Floating device for orbiting scroll and compressor comprising such a floating device

Abstract

The application discloses a floating device of a moving disc and a compressor comprising the same. The floating device of the moving disc comprises a moving disc and a floating support base. The back surface of the moving disc is provided with a moving disc back pressure hole for being connected with a first bearing. The moving disc is matched with an eccentric part of an eccentric shaft through the first bearing. The floating support base is fixed on a side of a rack close to the moving disc and is matched with the eccentric shaft through a second bearing. The surface of the floating support base close to the moving disc is provided with a circle of floating grooves. A floating ring is installed at the floating grooves. The convex column part of the floating ring is inserted into the floating grooves. The floating part of the floating ring and the floating connection area of the back surface of the moving disc form a sliding sealing surface. The elastic support part of the floating ring is elastically connected with the floating support base. The floating part and the elastic support part of the floating ring are respectively arranged on the opposite sides of the convex column part of the floating ring. Through the floating of the moving disc, the pressure of the back thrust surface of the moving disc can be reduced, the abrasion is reduced, and the service life of the compressor is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressors, and in particular relates to a movable plate floating device and a compressor comprising the movable plate floating device. Background Art

[0002] As the speed of automotive variable-frequency scroll compressors increases, higher requirements are placed on high-speed and stable scroll operation. The floating stator plate places high demands on the pressure and wear resistance of the thrust surface at the bottom of the moving plate, especially at high-speed operation (8500rpm-10000rpm), where the wear of the thrust surface is exacerbated. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a movable plate floating device and a compressor including the movable plate floating device.

[0004] In order to achieve the above object, the technical solution of the present invention is as follows:

[0005] On the one hand, the present invention discloses a movable plate floating device, comprising: a movable plate and a floating support seat, the back of the movable plate is provided with a movable plate back pressure hole for being nested and connected with a first bearing, and the movable plate cooperates with the eccentric part of the eccentric shaft through the first bearing; the floating support seat is fixed on the side of the frame close to the movable plate, and the floating support seat cooperates with the eccentric shaft through a second bearing; the surface of the floating support seat close to the movable plate is provided with a circle of floating grooves, and a floating ring is installed at the floating groove, the convex column part of the floating ring extends into the floating groove, and the floating part of the floating ring forms a sliding sealing surface with the floating connection area on the back of the movable plate, the elastic support part of the floating ring is elastically connected to the floating support seat, and the floating part and the elastic support part of the floating ring are respectively arranged on the opposite sides of the convex column part of the floating ring.

[0006] The present invention's floating disc device features a simple structure. Backpressure holes are located on the back of the disc, generating backpressure that lifts the floating ring and disc. Under this lifting force, the disc achieves floating motion via the floating support. During liquid surge and other overload conditions, the disc allows the disc to float, mitigating impact. Furthermore, due to the disc's eccentric structure, the backpressure could cause the floating ring to tilt during the process. However, the present invention elastically connects one end of the floating ring to the floating support, effectively preventing the ring from tipping over and ensuring proper operation of the device.

[0007] The present invention can reduce the pressure on the thrust surface at the back of the moving disk by making the moving disk float, thereby reducing wear and tear and increasing the service life of the compressor.

[0008] On the basis of the above technical solution, the following improvements can be made:

[0009] As a preferred solution, a sealing ring is installed on one side of the elastic support portion of the floating ring in the floating groove.

[0010] By adopting the above preferred solution, the sealing performance of the back pressure cavity of the movable plate is improved, the sealed back pressure cavity provides reliable back pressure, and the floating ring and the movable plate are pressed tightly to achieve vortex seal compression.

[0011] As a preferred solution, at least two elastic strip installation grooves evenly distributed on the periphery of the floating groove are provided on the floating support seat, and an elastic strip for elastic connection with the elastic support portion of the floating ring is installed in each elastic strip installation groove.

[0012] In this preferred embodiment, the elastic strip is mounted using the elastic strip mounting groove to prevent it from shifting. Furthermore, elastically supporting one end of the floating ring offsets the floating ring's axial bending moment, preventing it from tipping over due to eccentric tilting forces. As a preferred embodiment, the floating ring has the same number of elastic support portions as the elastic strip mounting grooves, and the shape of the elastic support portions matches that of the elastic strip mounting grooves.

[0013] The above preferred solution is adopted to ensure the stability of the elastic support of the floating ring.

[0014] As a preferred solution, the groove depth of the floating groove is greater than the groove depth of the elastic strip installation groove.

[0015] By adopting the above preferred solution, the installation of the sealing ring is more stable, ensuring the sealing of the back pressure cavity of the moving plate.

[0016] As a preferred solution, the floating support seat cooperates with the eccentric shaft through a shaft seal, and the shaft seal is used to seal the side of the second bearing away from the moving disc.

[0017] By adopting the above preferred solution, the sealing performance of the back pressure cavity of the movable plate is improved. The sealed back pressure cavity can provide reliable back pressure to press the floating ring and the movable plate, thereby realizing vortex seal compression.

[0018] As a preferred solution, there is a floating gap between the bottom of the convex column portion of the floating ring and the bottom of the floating groove.

[0019] By adopting the above preferred solution, a floating gap exists between the bottom of the convex column and the bottom of the floating groove, which can realize floating unloading of the compressor under liquid hammer or other overload conditions.

[0020] As a preferred solution, at least one anti-rotation groove is provided on the back of the moving plate; at least one anti-rotation pin is provided on the floating support seat, and one anti-rotation pin extends into a corresponding anti-rotation groove.

[0021] By adopting the above preferred solution, the anti-rotation groove on the movable plate and the anti-rotation pin on the floating support seat are used in conjunction with each other to achieve anti-rotation.

[0022] As a preferred solution, a matching bushing is provided in each anti-rotation groove.

[0023] By adopting the above preferred solution, the additional bushing can effectively improve the wear resistance.

[0024] On the other hand, the present invention further discloses a compressor comprising any one of the above-mentioned movable plate floating devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is one of the structural schematic diagrams of the compressor provided in an embodiment of the present invention.

[0027] Figure 2 for Figure 1 Cross-sectional view along the AA direction.

[0028] Figure 3 for Figure 2 A partial enlarged view of part B in the middle.

[0029] Figure 4 This is the second structural schematic diagram of the compressor provided in an embodiment of the present invention.

[0030] Figure 5 for Figure 4 Cross-sectional view in CC direction.

[0031] Figure 6 A schematic structural diagram of a moving disk provided in an embodiment of the present invention.

[0032] Figure 7 This is a back view of the moving disk provided in an embodiment of the present invention.

[0033] Figure 8 A top view of a floating support seat (with a floating ring) provided in an embodiment of the present invention.

[0034] Figure 9 for Figure 8 Cross-sectional view in the middle DD direction.

[0035] Figure 10 A top view of a floating support seat (without a floating ring) provided in an embodiment of the present invention.

[0036] Among them: 1-moving plate, 11-moving plate back pressure hole, 12-floating connection area, 2-floating support seat, 21-floating groove, 22-elastic strip mounting groove, 31-first bearing, 32-second bearing, 41-eccentric shaft, 42-eccentric part, 5-frame, 6-floating ring, 61-boss part, 62-floating part, 63-elastic support part, 71-sealing ring, 72-shaft seal, 8-elastic strip, 91-anti-rotation groove, 92-stop pin, 93-bushing, 10-static plate, a-floating gap, b-gap. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] The use of ordinal numbers "first," "second," "third," etc. to describe common objects merely indicates that different instances of similar objects are involved and is not intended to imply that the objects so described must have a given order in time, space, ranking, or in any other manner.

[0040] In addition, the expression “including” an element is an “open” expression, which simply means that corresponding components exist and should not be interpreted as excluding additional components.

[0041] In order to achieve the purpose of the present invention, a movable plate floating device and a compressor including the movable plate floating device are provided in some embodiments, such as Figure 1-10 As shown, the movable disc floating device includes: a movable disc 1 and a floating support seat 2. The back of the movable disc 1 is provided with a movable disc back pressure hole 11 for nesting and connecting with the first bearing 31. The movable disc 1 cooperates with the eccentric part 42 of the eccentric shaft 41 through the first bearing 31.

[0042] The floating support seat 2 is fixed on the side of the frame 5 close to the movable disc 1, and the floating support seat 2 cooperates with the eccentric shaft 41 through the second bearing 32; the surface of the floating support seat 2 close to the movable disc 1 is provided with a circle of floating groove 21, and a floating ring 6 is installed at the floating groove 21, and the convex column portion 61 of the floating ring 6 extends into the floating groove 21, and the floating portion 62 of the floating ring 6 forms a sliding sealing surface with the floating connection area 12 on the back side of the movable disc 1, and the elastic support portion 63 of the floating ring 6 is elastically connected to the floating support seat 2, and the floating portion 62 and the elastic support portion 63 of the floating ring 6 are respectively arranged on the opposite sides of the convex column portion 61 of the floating ring 6.

[0043] The bottom of the floating portion 62 of the floating ring 6 and the bottom of the floating groove 21 form a cavity.

[0044] The floating connection area 12 on the back side of the moving disk 1 is an annular area on the back side of the moving disk 1 close to the edge.

[0045] The movable disk floating device of the present invention has the following beneficial effects:

[0046] First, a moving plate back pressure hole 11 is provided on the back of the moving plate, which generates back pressure on the back of the moving plate to lift the floating ring and the moving plate. Under this lifting force, the moving plate realizes floating motion through the floating support seat 2. In the event of liquid shock or other overload conditions, it can float through the moving plate to reduce impact.

[0047] Second, the first bearing 31 in the back pressure chamber is lubricated by the oil-air mixture in the back pressure hole 11 of the movable plate.

[0048] Third, because the movable plate 1 is eccentric, the back pressure may cause the floating ring 6 to tilt and overturn during the process of supporting the movable plate. However, the present invention elastically connects one end of the floating ring 6 to the floating support seat 2, which can effectively prevent the floating ring 6 from flipping and overturning, ensuring the normal operation of the device.

[0049] Fourth, the back of the moving plate slides on the surface of the floating ring 6 to form a sliding sealing surface.

[0050] Fifth, the movable plate floating device has a simple structure. Through the floating of the movable plate, the pressure on the thrust surface at the back of the movable plate 1 can be reduced, thereby reducing wear and tear and increasing the life of the compressor.

[0051] In order to further optimize the implementation effect of the present invention, in some other embodiments, the remaining characteristic technologies are the same, except that a sealing ring 71 is installed on one side of the elastic support portion 63 of the floating ring 6 in the floating groove 21.

[0052] By adopting the above preferred solution, the sealing performance of the back pressure cavity of the movable plate 1 is improved, and the reliable back pressure provided by the sealing back pressure cavity presses the floating ring 6 and the movable plate 1 to achieve vortex sealing compression.

[0053] Furthermore, based on the above embodiment, six elastic strip mounting grooves 22 are evenly distributed on the periphery of the floating groove 21 on the floating support seat 2, and an elastic strip 8 for elastic connection with the elastic support part 63 of the floating ring 6 is installed in each elastic strip mounting groove 22.

[0054] With the above preferred solution, the elastic strip 8 is installed using the elastic strip installation groove 22 to prevent the elastic strip 8 from shifting. At the same time, the six-way elastic support can offset the axial bending moment of the floating ring 6 and prevent it from tipping over due to eccentric overturning force.

[0055] Furthermore, based on the above embodiment, the floating ring 6 has elastic support portions 63 whose number is the same as the elastic strip installation grooves 22 , and the shape of the elastic support portions 63 is consistent with the shape of the elastic strip installation grooves 22 .

[0056] The above preferred solution ensures the stability of the elastic support of the floating ring 6. The number of the elastic support parts 63 is consistent with the number of the elastic strip installation grooves 22, and the elastic support parts 63 are evenly distributed outside the floating part 62 of the floating ring 6.

[0057] Furthermore, based on the above embodiment, the groove depth of the floating groove 21 is greater than the groove depth of the elastic strip installation groove 22 .

[0058] By adopting the above preferred solution, the installation of the sealing ring 71 is more stable, thereby ensuring the sealing of the back pressure cavity of the movable plate 1.

[0059] Furthermore, based on the above embodiment, the floating support seat 2 cooperates with the eccentric shaft 41 through a shaft seal 72 , and the shaft seal 72 is used to seal the side of the second bearing 32 away from the movable plate 1 .

[0060] In this preferred embodiment, the shaft seal 72 is installed below the second bearing 32, improving sealing performance. The sliding sealing surface formed by the rotor plate 1 and floating ring 6, the floating ring 6 seal ring 71, the shaft seal 72, the rotor plate 1, the floating ring 6, and the floating support seat 2 form a closed chamber, providing excellent sealing. The sealed backpressure chamber provides reliable backpressure, compressing the floating ring 6 and rotor plate 1, achieving scroll seal compression.

[0061] In order to further optimize the implementation effect of the present invention, in some other embodiments, the remaining characteristic technologies are the same, except that there is a floating gap a between the bottom of the boss portion 61 of the floating ring 6 and the bottom of the floating groove 21.

[0062] With the above preferred solution, a floating gap a exists between the bottom of the boss portion 61 and the bottom of the floating groove 21, which enables the compressor to float and unload in the event of liquid hammer or other overload conditions.

[0063] It's worth noting that the compressor's stator plate 10 is held in place by the top cover. To ensure free movement of the floating ring 6, a gap b exists between the top surface of the floating ring 6 and the bottom surface of the stator plate 10. This ensures that the floating portion 62 of the floating ring 6 forms a sliding seal with the floating connection area 12 on the back of the rotor plate 1, ensuring that the top surfaces of the rotor plate 1 and the stator plate 10 are in perfect contact.

[0064] In order to further optimize the implementation effect of the present invention, in some other embodiments, the remaining characteristic technologies are the same, the difference is that six anti-rotation grooves 91 are provided on the back of the moving disk 1; six anti-rotation pins 92 are provided on the floating support seat 2, and one anti-rotation pin 92 extends into a corresponding anti-rotation groove 91.

[0065] By adopting the above preferred solution, the anti-rotation groove 91 on the movable plate 1 and the anti-rotation pin 92 on the floating support seat 2 are used in conjunction with each other to achieve anti-rotation.

[0066] Furthermore, based on the above embodiment, a matching bushing 93 is provided in each anti-rotation groove 91 .

[0067] By adopting the above preferred solution, the additional bushing 93 can effectively improve the wear resistance.

[0068] Furthermore, based on the above embodiment, the anti-rotation groove 91 on the movable disc 1 is arranged on the inner periphery of the floating connection area 12 on the back side of the movable disc 1. At the same time, for the floating support seat 2, the anti-rotation pin 92 is also arranged on the inner periphery of the floating ring 6.

[0069] The above preferred solution is adopted to ensure the effectiveness of sealing.

[0070] Furthermore, based on the above embodiment, a stop pin 92 is provided corresponding to an elastic strip installation groove 22 , that is, the elastic strip installation groove 22 and the stop pin 92 are installed on the same radial line of the floating support seat 2 .

[0071] The above preferred solution is adopted to ensure the stability of the movable plate floating device structure.

[0072] In addition, an embodiment of the present invention further discloses a compressor, comprising the movable plate floating device disclosed in any of the above embodiments.

[0073] The above multiple implementations can be implemented in parallel.

[0074] At the same time, the specific numbers mentioned in the specific embodiments are only examples, and the protection scope of the present invention is not limited to these numbers.

[0075] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0076] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0077] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. Moving disc floating device, including: A movable plate, wherein the back of the movable plate is provided with a movable plate back pressure hole for being nested and connected with the first bearing, and the movable plate is matched with the eccentric part of the eccentric shaft through the first bearing, and is characterized in that the movable plate floating device further includes: a floating support seat; The floating support seat is fixed on the side of the frame close to the movable plate, and the floating support seat is matched with the eccentric shaft through the second bearing; A floating groove is provided on the surface of the floating support seat on the side close to the movable plate. A floating ring is installed in the floating groove. The convex column portion of the floating ring extends into the floating groove. The floating portion of the floating ring forms a sliding sealing surface with the floating connection area on the back side of the movable plate. The elastic support portion of the floating ring is elastically connected to the floating support seat. The floating portion and the elastic support portion of the floating ring are respectively provided on opposite sides of the convex column portion of the floating ring. A sealing ring is installed in the floating groove on one side of the elastic support portion close to the floating ring; At least two elastic strip mounting grooves are provided on the floating support seat, which are evenly distributed on the periphery of the floating groove. An elastic strip for elastically connecting to the elastic support part of the floating ring is installed in each of the elastic strip mounting grooves. The elastic strip is used to elastically support one end of the floating ring to offset the axial bending moment of the floating ring and prevent it from tipping over due to eccentric turning force.

2. The movable disk floating device according to claim 1, characterized in that: The floating ring has elastic support parts with the same number as the elastic strip installation grooves, and the shapes of the elastic support parts are consistent with the shapes of the elastic strip installation grooves.

3. The movable plate floating device according to claim 1, characterized in that: The groove depth of the floating groove is greater than the groove depth of the elastic strip installation groove.

4. The movable plate floating device according to any one of claims 1 to 3, characterized in that: There is a floating gap between the bottom of the convex column portion of the floating ring and the bottom of the floating groove.

5. The movable plate floating device according to any one of claims 1 to 3, characterized in that: The floating support seat cooperates with the eccentric shaft through a shaft seal, and the shaft seal is used to seal the side of the second bearing away from the moving disc.

6. The movable plate floating device according to any one of claims 1 to 3, characterized in that: At least one anti-rotation groove is provided on the back side of the movable plate; at least one anti-rotation pin is provided on the floating support seat, and one of the anti-rotation pins extends into a corresponding anti-rotation groove.

7. The movable plate floating device according to claim 6, characterized in that: A matching bushing is provided in each of the anti-rotation grooves.

8. A compressor, characterized in that It comprises the movable plate floating device as described in any one of claims 1-7.

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