Main bearing and compressor

Abstract

The application discloses a main supporting seat and a compressor. The main supporting seat is applied to the compressor. The compressor comprises a rotating orbiting disk on the main supporting seat, a high-pressure area and a back pressure cavity are arranged on the back of the orbiting disk, a back pressure oil supply channel connecting the high-pressure area and the back pressure cavity is arranged on the main supporting seat, and the back pressure oil supply channel is used for periodically connecting the high-pressure area and the back pressure cavity when the orbiting disk rotates. According to the application, the back pressure oil supply channel connecting the high-pressure area and the back pressure cavity is arranged on the main supporting seat, so that the lubricating oil in the high-pressure area can flow into the back pressure cavity through the channel, the oil amount in the back pressure cavity is ensured to be sufficient when the compressor works, the occurrence of the abrasion of the contact surface of the orbiting disk and the fixed scroll is reduced, and the reliability of the compressor is improved. In addition, the application does not arrange the channel on the orbiting disk, so that the strength of the orbiting disk base plate is not insufficient, and thus the serious consequences such as deformation or fracture are not caused.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and in particular to a main support and compressor. Background Technology

[0002] Patent CN210484041U discloses a moving scroll plate and its back pressure oil supply structure for a scroll compressor, aiming to achieve more efficient and stable oil supply through structural optimization. The core of this patent lies in the ingenious arrangement of an oil supply groove on the end face of the bearing tail of the moving scroll plate. This design cleverly utilizes the translational characteristics of the moving scroll plate during operation, allowing the oil supply groove to flexibly move between the high-pressure zone and the back pressure chamber. Through this dynamic process, lubricating oil is effectively transferred from the high-pressure zone to the back pressure chamber, thereby achieving automatic oil supply to the back pressure chamber. Furthermore, to further improve oil supply efficiency, this patent also adds a sealing ring oil groove on the end face of the sealing ring near the moving scroll plate.

[0003] However, although this back-pressure oil supply method solves the oil supply problem of the back-pressure chamber to some extent, it still has certain limitations in practical applications. Specifically, when the oil supply groove moves to the back-pressure chamber area, due to the continuous rotation of the moving scroll plate, the lubricating oil may not be completely released into the back-pressure chamber, but instead quickly returns to the high-pressure area. This phenomenon results in the actual amount of lubricating oil transferred to the back-pressure chamber being lower than expected. Especially under conditions where the compressor is operating under high load or when oil demand surges, the amount of oil in the back-pressure chamber may not meet the demand, thus adversely affecting the operating stability and reliability of the compressor.

[0004] Patent CN102016319A discloses a scroll compressor. This design achieves intermittent communication of lubricating oil from the high-pressure area on the back of the moving scroll plate to the back pressure chamber by setting a channel inside the moving plate base, thereby simplifying the lubrication system and improving lubrication efficiency.

[0005] While this design solves the oil supply problem of the back pressure chamber to some extent, its implementation also brings some new technical challenges. Specifically, drilling is required to create channels within the moving scroll plate. This process not only increases manufacturing costs but may also adversely affect the strength of the moving scroll plate. Since the moving scroll plate is a critical component that withstands various forces and torques during compressor operation, a reduction in its strength may lead to serious consequences such as deformation or breakage, and will also affect the arrangement of other features on the moving scroll plate (such as the balancing grooves). Summary of the Invention

[0006] The purpose of this invention is to provide a main support and compressor, which aims to solve the problems of insufficient oil supply to the back pressure chamber during the operation of existing scroll compressors, resulting in wear on the contact surfaces of the moving and stationary scroll plates, and insufficient strength of the moving plate base caused by setting channels in the moving plate base.

[0007] This invention provides a main support base for use in a compressor. The compressor includes a rotating scroll plate that can rotate on the main support base. The back of the rotating scroll plate is provided with a high-pressure zone and a back-pressure chamber. The main support base is provided with a back-pressure oil supply channel connecting the high-pressure zone and the back-pressure chamber. The back-pressure oil supply channel is used to periodically connect the high-pressure zone and the back-pressure chamber when the rotating scroll plate rotates.

[0008] Furthermore, it also includes: a back pressure oil supply mechanism, which is installed in the back pressure oil supply channel and extends one end into the back pressure cavity. The back pressure oil supply mechanism is used to connect the high pressure area and the back pressure cavity when in contact with the moving scroll plate, and to block the high pressure area and the back pressure cavity when separated from the moving scroll plate.

[0009] Furthermore, the back pressure oil supply mechanism includes a sealing element, which includes a sealing section and a connecting section connected to the sealing section at one end. A sealing hole is provided in the back pressure oil supply channel. The other end of the connecting section is movably installed in the sealing hole and has a gap with the sealing hole. The sealing section is closer to the high pressure area than the connecting section. When the sealing section abuts against the periphery of the sealing hole, the other end of the connecting section extends into the back pressure cavity.

[0010] Furthermore, the back pressure oil supply mechanism also includes: a fixing member, the sealing hole being disposed within the fixing member, the fixing member being disposed in the back pressure oil supply channel, and the diameter of the sealing section being larger than the diameter of the sealing hole.

[0011] Furthermore, the other end of the connecting segment is arc-shaped.

[0012] Furthermore, at least one limiting segment is provided on the side of the connecting segment to restrict the radial movement of the seal.

[0013] Furthermore, the back pressure oil supply mechanism also includes a reset elastic element, which is installed in the back pressure oil supply channel. One end of the reset elastic element abuts against the main support seat, and the other end of the reset elastic element abuts against the sealing section.

[0014] Furthermore, the back pressure oil supply channel includes a multi-stage stepped hole, and the multi-stage stepped hole includes a first-stage stepped hole, a second-stage stepped hole, and a third-stage stepped hole arranged sequentially along the oil supply direction. The diameters of the first-stage stepped hole, the second-stage stepped hole, and the third-stage stepped hole increase sequentially. The fixing member is disposed in the third-stage stepped hole, the sealing member is disposed in the second-stage stepped hole, and one end of the reset elastic member is disposed in the first-stage stepped hole.

[0015] Furthermore, a sealing elastic element and a sealing ring separating the high-pressure area and the back pressure cavity are provided between the back side of the moving scroll disk and the main support seat. One end of the sealing elastic element abuts against the main support seat, and the other end of the sealing elastic element abuts against the sealing ring.

[0016] This invention provides a compressor, comprising: a main support base and a rotating scroll plate rotatable on the main support base, wherein the main support base is the aforementioned main support base.

[0017] This invention discloses a main support base and a compressor. The main support base is used in a compressor, which includes a rotating scroll plate rotatable on the main support base. A high-pressure zone and a back-pressure chamber are provided on the back side of the rotating scroll plate. A back-pressure oil supply channel is provided on the main support base to connect the high-pressure zone and the back-pressure chamber. The back-pressure oil supply channel is used to periodically connect the high-pressure zone and the back-pressure chamber when the rotating scroll plate rotates. This invention, by providing a back-pressure oil supply channel on the main support base to connect the high-pressure zone and the back-pressure chamber, allows lubricating oil from the high-pressure zone to flow into the back-pressure chamber through this channel, ensuring sufficient oil supply in the back-pressure chamber during compressor operation, reducing wear on the contact surfaces of the rotating and stationary scroll plates, and improving the reliability of the compressor. Furthermore, this invention does not include a channel on the rotating scroll plate, thus avoiding insufficient strength of the rotating plate base and preventing serious consequences such as deformation or breakage. It also does not affect the arrangement of other features on the rotating scroll plate (such as balance grooves). The present invention can also ensure that the back pressure oil supply channel inside the main support can be periodically connected, and can prevent excessive leakage of high pressure fluid in the high pressure area to the back pressure cavity, thus preventing loss of cooling capacity. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the compressor structure in this embodiment;

[0020] Figure 2 This is a schematic diagram of the back pressure oil supply channel.

[0021] Figure 3 Exploded view of the back pressure oil supply mechanism;

[0022] Figure 4 This is a schematic diagram of the structure when the high-pressure zone and the back pressure chamber are connected.

[0023] Figure 5This is a schematic diagram of the structure when the high-pressure zone and the back pressure chamber are not connected.

[0024] Figure 6 A schematic diagram of the back pressure oil supply mechanism switching from the closed state to the open state;

[0025] Figure 7 This is a schematic diagram of the back pressure oil supply mechanism switching from the open state to the closed state.

[0026] Explanation of markings in the diagram:

[0027] 1. Main support seat; 11. Back pressure oil supply channel; 111. Sealing hole; 112. First-stage step hole; 113. Second-stage step hole; 114. Third-stage step hole; 115. Main bearing seat hole; 116. Scroll plate mounting part; 117. Support ring plate part; 12. Horizontal channel; 13. Vertical channel;

[0028] 2. Moving scroll plate; 21. High-voltage zone; 22. Back pressure chamber; 23. Moving scroll teeth; 24. Base plate; 25. Moving plate bearing housing;

[0029] 3. Back pressure oil supply mechanism; 31. Seal; 311. Sealing section; 312. Connecting section; 313. Limiting section; 32. Fixing component; 33. Reset elastic component;

[0030] 4. Crankshaft; 41. Eccentric section; 42. Main oil passage;

[0031] 5. Sealing elastic element;

[0032] 6. Sealing ring. Detailed Implementation

[0033] 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, not all, of the embodiments of the present invention. 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.

[0034] It should be understood that, when used in this specification and the appended claims, the terms “comprising” and “including” indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more of its features, integrals, steps, operations, elements, components and / or collections thereof.

[0035] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0036] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0037] Please see Figure 1 and Figure 2 This embodiment provides a main support 1, which is used in a compressor. The compressor includes a rotating scroll 2 that can rotate on the main support 1. A high-pressure zone 21 and a back pressure chamber 22 are provided on the back side of the rotating scroll 2. A back pressure oil supply channel 11 is provided on the main support 1 to connect the high-pressure zone 21 and the back pressure chamber 22. The back pressure oil supply channel 11 is used to periodically connect the high-pressure zone 21 and the back pressure chamber 22 when the rotating scroll 2 rotates.

[0038] This embodiment provides a back pressure oil supply channel 11 on the main support 1, connecting the high-pressure zone 21 and the back pressure chamber 22. This allows lubricating oil from the high-pressure zone 21 to flow into the back pressure chamber 22 through this channel, ensuring sufficient oil supply in the back pressure chamber 22 during compressor operation. This reduces wear on the contact surfaces of the moving and stationary scroll plates, improving the compressor's reliability. Furthermore, this embodiment does not include a channel on the moving scroll plate 2, preventing insufficient strength of the moving plate base and thus avoiding serious consequences such as deformation or breakage. It also does not affect the arrangement of other features on the moving scroll plate 2 (such as the balance groove). Additionally, it ensures that the back pressure oil supply channel 11 inside the main support 1 remains periodically connected and prevents excessive leakage of high-pressure fluid from the high-pressure zone 21 into the back pressure chamber 22, thus preventing heat loss.

[0039] In one embodiment, the back pressure oil supply channel 11 is a separately provided through hole, and the back pressure oil supply channel 11 is located within the range of the translational motion of the moving scroll plate 2. When the moving scroll plate 2 is driven by the eccentric part 41 of the crankshaft 4 to perform translational motion around the center of the crankshaft 4 with a fixed radius, there will always be a period of time during one rotation of the moving scroll plate 2 that the moving scroll plate 2 covers the back pressure oil supply channel 11, thereby closing the back pressure oil supply channel 11 and making the high pressure zone 21 and the back pressure cavity 22 in a non-connected state. When the moving scroll plate 2 does not cover the back pressure oil supply channel 11, the back pressure oil supply channel 11 is in an open state, and the high pressure zone 21 and the back pressure cavity 22 are in a connected state.

[0040] The periodic translational motion of the moving scroll plate 2 ensures the periodic continuity of the back pressure oil supply channel 11 inside the main support 1, preventing excessive leakage of high-pressure fluid from the high-pressure zone 21 to the back pressure chamber 22 and thus preventing heat loss. Furthermore, designing the back pressure oil supply channel 11 as a separately installed through-hole and placing it along the path of the translational motion of the moving scroll plate 2 simplifies the mechanical structure and reduces processing difficulty and cost. This design also facilitates subsequent maintenance and repair.

[0041] Please see Figure 1 In this embodiment, it also includes a back pressure oil supply mechanism 3, which is installed in the back pressure oil supply channel 11 and extends to the back pressure cavity 22 at one end. The back pressure oil supply mechanism 3 is used to connect the high pressure zone 21 and the back pressure cavity 22 when in contact with the moving scroll plate 2, and to block the high pressure zone 21 and the back pressure cavity 22 when separated from the moving scroll plate 2.

[0042] The back pressure oil supply mechanism 3 can precisely control the connection and disconnection between the high pressure zone 21 and the back pressure chamber 22 according to the motion state of the moving scroll plate 2. The back pressure oil supply mechanism 3 is directly installed in the back pressure oil supply channel 11 and designed to contact or separate from the moving scroll plate 2 to control the oil flow. This design not only simplifies the mechanical structure, but also reduces the complexity of the system and maintenance costs.

[0043] For further details, please refer to Figure 3-5 The back pressure oil supply mechanism 3 includes a seal 31, which includes a sealing section 311 and a connecting section 312 connected to the sealing section 311 at one end. A sealing hole 111 is provided in the back pressure oil supply channel 11. The other end of the connecting section 312 is movably installed in the sealing hole 111 and has a gap with the sealing hole 111. The sealing section 311 is closer to the high pressure zone 21 than the connecting section 312. When the sealing section 311 abuts against the periphery of the sealing hole 111, the other end of the connecting section 312 extends into the back pressure cavity 22.

[0044] When the sealing section 311 abuts against the periphery of the sealing hole 111, the other end of the connecting section 312 extends into the back pressure chamber 22. Therefore, when the moving scroll 2 is driven by the eccentric part 41 of the crankshaft 4 to perform translational motion around the center of the crankshaft 4 with a fixed radius, there will always be a period of time during one rotation when the moving scroll 2 contacts the other end of the connecting section 312, thereby squeezing the connecting section 312, causing the connecting section 312 to move downward within the sealing hole 111, and driving the sealing section 311 to move downward. At this time, the back pressure oil supply channel 11 is in the open state, the high pressure zone 21 and the back pressure chamber 22 are in the connected state, and the high pressure fluid in the high pressure zone 21 flows into the back pressure chamber 22 through the gap between the connecting section 312 and the sealing hole 111 (e.g., Figure 4(As shown). When the moving scroll plate 2 does not contact the other end of the connecting section 312, the other end of the connecting section 312 is not under force, while the sealing section 311 gradually moves upward under the action of the high-pressure fluid in the high-pressure zone 21. When the sealing section 311 abuts against the periphery of the sealing hole 111, the sealing section 311 seals the back pressure oil supply channel 11, the back pressure oil supply channel 11 is in a closed state, and the high-pressure zone 21 and the back pressure chamber 22 are in a non-connected state (as shown). Figure 5 (As shown).

[0045] The design of the seal 31, especially the combination of the sealing section 311 and the connecting section 312, provides a highly efficient sealing effect. When the sealing section 311 abuts against the periphery of the sealing hole 111, a tight sealing interface is formed, effectively preventing oil leakage between the high-pressure zone 21 and the back pressure chamber 22, and ensuring the stable operation of the system.

[0046] In this embodiment, the back pressure oil supply mechanism 3 further includes: a fixing member 32 (such as...). Figure 3 As shown), the sealing hole 111 is set inside the fixing member 32, which is set in the back pressure oil supply channel 11, and the diameter of the sealing section 311 is larger than the diameter of the sealing hole 111.

[0047] The fastener 32 and the seal 31 are typically made of elastic materials such as rubber, silicone, and polyurethane, which have good elasticity and wear resistance. Therefore, the fastener 32 can reduce frictional damage between the seal 31 and the sealing hole 111, thereby extending the service life of the seal 31 and reducing replacement and maintenance costs.

[0048] Furthermore, since one end of the fixing member 32 is the high pressure of the exhaust and the other end is the back pressure (not the low pressure of the intake, but the medium pressure drawn from the compression chamber), the pressure difference between the two sides will not be very large. Therefore, the fixing member 32 can be fixed in the back pressure oil supply channel 11 by interference fit, or by applying adhesive, or by other methods. These will not be elaborated further.

[0049] In this embodiment, the other end of the connecting segment 312 is arc-shaped.

[0050] The arc-shaped design effectively disperses the stress and impact force experienced by the passive scroll disk 2 during the extrusion of the connecting section 312. Through a smooth transition, the arc-shaped design distributes stress evenly over a wider area, improving the overall strength and durability of the connecting section 312.

[0051] In this embodiment, at least one limiting segment 313 (e.g., ...) is provided on the side of the connecting segment 312. Figure 3 (As shown) to limit the radial movement of the seal 31.

[0052] The limiting section 313 effectively prevents radial movement of the seal 31 when subjected to external factors such as pressure. This stability ensures that the seal 31 can continuously and reliably maintain its sealing effect. The restriction of radial movement reduces friction and wear between the seal 31 and the sealing hole 111, thereby extending the service life of the seal 31. This not only reduces the frequency and cost of replacing the seal 31 but also reduces system downtime due to frequent maintenance.

[0053] In this embodiment, the back pressure oil supply mechanism 3 further includes: a reset elastic element 33 (such as...). Figure 3 As shown), the reset elastic element 33 is installed in the back pressure oil supply channel 11. One end of the reset elastic element 33 abuts against the main support seat 1, and the other end of the reset elastic element 33 abuts against the sealing section 311.

[0054] When the high-pressure fluid in the high-pressure zone 21 is insufficient to press the seal 31 against the periphery of the sealing hole 111, the reset elastic element 33 provides additional force to the seal 31, thereby ensuring that the seal 31 remains tightly fitted against the periphery of the sealing hole 111. This additional force originates from the inherent elastic potential energy of the reset elastic element 33 (such as a spring or elastic gasket). When the external pressure on the seal 31 decreases or disappears, the elastic element can automatically release the stored energy, pushing the seal 31 towards the sealing hole 111 until the predetermined sealing state is achieved.

[0055] Furthermore, the use of the reset elastic element 33 enhances the system's fault tolerance and adaptability. Under extreme conditions, such as a sudden drop or large fluctuation in fluid pressure, the seal 31 may temporarily lose sufficient pressure support and experience slight displacement. In this case, the reset elastic element 33 can respond quickly, providing additional force to promptly pull the seal 31 back to the correct sealing position, preventing leakage and ensuring the continuous and stable operation of the system.

[0056] In this embodiment, please refer to Figure 4 The back pressure oil supply channel 11 is L-shaped and includes a horizontal channel 12 and a vertical channel 13. One end of the horizontal channel 12 is connected to the high pressure zone 21, the other end of the horizontal channel 12 is connected to one end of the vertical channel 13, and the other end of the vertical channel 13 is connected to the back pressure chamber 22.

[0057] The L-shaped design cleverly utilizes the spatial layout, effectively reducing fluid stagnation and eddy currents in the back pressure oil supply channel 11, thereby improving the smoothness and efficiency of fluid flow.

[0058] In this embodiment, the back pressure oil supply channel 11 includes a multi-stage stepped hole, which is vertically arranged and includes a first-stage stepped hole 112, a second-stage stepped hole 113, and a third-stage stepped hole 114 arranged sequentially along the oil supply direction (e.g., ...). Figure 2 As shown, the diameters of the first-stage step hole 112, the second-stage step hole 113, and the third-stage step hole 114 increase sequentially. The fixing member 32 is disposed in the third-stage step hole 114, the sealing member 31 is disposed in the second-stage step hole 113, and one end of the reset elastic member 33 is disposed in the first-stage step hole 112.

[0059] The multi-stage stepped hole design provides precise positioning and fixing space for the fixing component 32, the sealing component 31, and the reset elastic component 33. The diameter of each stepped hole increases sequentially, allowing different components to be installed in a predetermined order and position, avoiding misalignment and loosening during installation, and ensuring the stability and reliability of the entire oil supply mechanism. The multi-stage stepped hole design allows for the rational layout of various components within a limited space, making full use of the space resources within the channel. This compact layout not only reduces the overall volume and weight of the oil supply mechanism but also helps improve the system's integration and operating efficiency. One end of the reset elastic component 33 is located in the first-stage stepped hole 112, which provides a stable support point for the reset elastic component 33, enabling it to release energy more stably under external force, providing a reliable counterforce to the sealing component 31. The sealing component 31 is located in the second-stage stepped hole 113, a design that helps create a more stable sealing environment. The diameter of the second-stage stepped hole 113 is moderate, providing sufficient support and positioning for the sealing component 31 while reducing friction and wear with surrounding components.

[0060] The portion where the first-stage stepped hole 112 connects to the transverse channel 12 is stepped. This stepped design can alter the flow path and velocity of the fluid to some extent, thus helping to optimize fluid dynamics performance. By rationally designing the shape, size, and position of the steps, eddies and turbulence at the connection points can be reduced, improving the smoothness and efficiency of fluid flow.

[0061] In this embodiment, the moving scroll disk 2 includes moving scroll teeth 23, a base plate 24, and a moving disk bearing seat 25 (e.g., Figure 1 As shown), the moving disc bearing housing 25 is fitted onto the eccentric portion 41 of the crankshaft 4. Lubricating oil in the main oil passage 42 of the crankshaft 4 can flow into the gap between the moving disc bearing housing 25 on the main support 1 and the outer surface of the eccentric portion 41 of the crankshaft 4, and then flow to the main bearing housing hole 115 on the main support 1 (as shown). Figure 1 As shown in the figure, this creates a high-pressure zone 21.

[0062] In this embodiment, a sealing elastic element 5 and a sealing ring 6 separating the high-pressure zone 21 and the back pressure chamber 22 are provided between the back of the moving scroll disk 2 and the main support 1 (e.g., Figure 4 As shown, one end of the sealing elastic element 5 abuts against the main support seat 1, and the other end of the sealing elastic element 5 abuts against the sealing ring 6.

[0063] The sealing elastic element 5 and the sealing ring 6 fit tightly together, effectively reducing the risk of fluid leakage between the high-pressure zone 21 and the back-pressure chamber 22. The sealing ring 6 is typically made of elastic materials such as rubber, silicone, polyurethane, etc., which have good elasticity and wear resistance.

[0064] Specifically, the main support 1 includes a scroll plate mounting part 116 and a main bearing housing hole 115 (e.g., Figure 1 As shown), the moving scroll plate 2 is mounted on the scroll plate mounting part 116, and the crankshaft 4 is inserted into the main bearing seat hole 115. The scroll plate mounting part 116 has a support ring plate part 117 near the main bearing seat hole 115 (as shown). Figure 1 As shown, the support ring plate 117 has a sealing ring mounting groove, and the sealing elastic element 5 and the sealing ring 6 are installed in the sealing ring mounting groove. The sealing ring 6 is in contact with the tail end face of the moving disc bearing seat 25. The sealing elastic element 5 can be a wave spring, elastic gasket, etc.

[0065] One end of the back pressure oil supply channel 11 is located on the wall of the main bearing seat hole 115 (i.e., high pressure zone 21), and the other end is located on the end face of the support ring plate portion 117 outside the mounting groove of the sealing ring 6 (i.e., back pressure cavity 22).

[0066] In this embodiment, the angle range of the opening state of the back pressure oil supply mechanism 3 is as follows: Figures 6 to 7 As shown. Figure 6 This is a schematic diagram of the back pressure oil supply mechanism 3 switching from the closed state to the open state. Circle O1 represents the tail end face of the circular moving disc bearing seat 25, with a radius of rO1; the center O2 represents the center of the circle around which the eccentric part 41 of the crankshaft 4 drives the tail end face of the moving disc bearing seat 25 to rotate eccentrically, and the eccentricity of the eccentric part 41 of the crankshaft 4 is the radius rO2 of circle O2. Therefore, the center O1 runs on circle O2 (assuming that the eccentric part 41 of the crankshaft 4 rotates eccentrically in a clockwise direction); circle O3 represents the outer circle on the other end of the connecting section 312 that can contact the tail end face of the moving disc bearing, with a radius of rO3; the distance between the center O2 and the center O3 is d23. When the tail end face of the moving disc bearing seat 25 just contacts the other end of the connecting section 312, circles O1 and O3 are tangent. At this time, according to the cosine theorem, we can calculate:

[0067]

[0068] Furthermore, the angle value A can be obtained. Figure 7 This is a schematic diagram showing the instantaneous transition of the back pressure oil supply mechanism 3 from the open to the closed state. Due to the symmetry in this example, the angle range of the open state of the back pressure oil supply mechanism 3 is A+A=2A. Therefore, the proportion of the time in which the back pressure oil supply mechanism 3 is open within the total time of one revolution of the moving disc is the ratio of 2A to 360°. Thus, the values ​​of rO1, rO2, rO3, and d23 can be designed according to specific requirements to control the proportion of time the back pressure oil supply mechanism 3 is open. Additionally, the diameter of the through hole in the center of the sealing block 6a controls the oil flow rate; a larger diameter results in a larger oil flow rate, which needs to be adjusted according to specific requirements.

[0069] It should be noted that the back pressure oil supply mechanism 3 can also be used to block the high pressure zone 21 and the back pressure chamber 22 when in contact with the moving scroll plate 2, and to connect the high pressure zone 21 and the back pressure chamber 22 when separated from the moving scroll plate 2.

[0070] In one embodiment, the back pressure oil supply mechanism 3 includes a seal 31, which includes a sealing section 311 and a connecting section 312 connected to the sealing section 311. The back pressure oil supply channel 11 is provided with a sealing part and a back pressure through hole. The sealing part is provided with a sealing hole 111. The connecting section 312 is movably installed in the sealing hole 111. The sealing section 311 is provided in the high pressure zone 21. When the sealing section 311 abuts against the sealing part, the connecting section 312 protrudes from the sealing hole 111 and there is a gap between the sealing part and the periphery of the sealing hole 111. When the sealing section 311 does not abut against the sealing part, the sealing section 311 seals the back pressure through hole.

[0071] When the moving scroll 2 is driven by the eccentric part 41 of the crankshaft 4 to perform translational motion around the center of the crankshaft 4 with a fixed radius, there will always be a period of time during one rotation when the moving scroll 2 contacts the connecting section 312. This allows it to compress the connecting section 312, causing it to move downward within the sealing hole 111. This movement then causes the sealing section 311 to move downward and abut against the back pressure through hole, sealing it. At this time, the back pressure oil supply channel 11 is closed, and the high-pressure zone 21 and the back pressure chamber 22 are not connected. When the moving scroll 2 is not in contact with the connecting section 312, the connecting section 312 is not under force, while the sealing section 311 gradually moves upward under the action of the high-pressure fluid in the high-pressure zone 21. When the sealing section 311 abuts against the periphery of the sealing hole 111, the back pressure oil supply channel 11 is open, and the high-pressure zone 21 and the back pressure chamber 22 are connected. The high-pressure fluid in the high-pressure zone 21 flows into the back pressure chamber 22 through the gap between the sealing part and the periphery of the sealing hole 111.

[0072] It should be noted that the core of this embodiment is the internal oil supply channel structure of the main support 1 and the structural design of the back pressure oil supply mechanism 3. The triggering method for the opening and closing state of the back pressure oil supply mechanism 3 is not unique. In the optimal embodiment, the opening and closing state of the back pressure oil supply mechanism 3 is triggered by the contact between the tail end face of the moving disc bearing seat 25 and the other end of the connecting section 312. However, even without relying on the tail end face of the moving disc bearing seat 25, certain features of existing components of the scroll compressor can be used to trigger the opening and closing state of the back pressure oil supply mechanism 3. It is even possible to design a specific element that can be connected to the crankshaft 4 and apply periodic pressure to the other end of the connecting section 312 during the rotation of the crankshaft 4, causing the back pressure oil supply mechanism 3 to open and close periodically, thereby achieving the purpose of periodically supplying oil to the back pressure chamber 22. Therefore, any embodiment that has a back pressure oil supply channel 11 that connects the high pressure zone 21 and the back pressure cavity 22 on the back side of the main support seat 1 of the present invention, and that is equipped with a triggering back pressure oil supply mechanism 3 at the back pressure cavity 22 end of the back pressure oil supply channel 11, is within the protection scope of the present invention.

[0073] This embodiment also provides a compressor, including: a main support 1 and a rotating scroll 2 that can rotate on the main support 1, wherein the main support 1 is the same as the main support 1 described in the above embodiment.

[0074] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

[0075] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusivity.

[0076] The term "comprises" implies that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A main support for use in a compressor, the compressor comprising: A rotating scroll plate that can rotate on the main support base, wherein a high-pressure zone and a back pressure cavity are provided on the back side of the rotating scroll plate, characterized in that a back pressure oil supply channel is provided on the main support base to connect the high-pressure zone and the back pressure cavity, and the back pressure oil supply channel is used to periodically connect the high-pressure zone and the back pressure cavity when the rotating scroll plate rotates; It also includes: a back pressure oil supply mechanism, which is installed in the back pressure oil supply channel and extends one end to the back pressure cavity. The back pressure oil supply mechanism is used to connect the high pressure area and the back pressure cavity when in contact with the moving scroll plate, and to block the high pressure area and the back pressure cavity when separated from the moving scroll plate. The back pressure oil supply mechanism includes: a sealing element, the sealing element including a sealing section and a connecting section connected to the sealing section at one end, a sealing hole is provided in the back pressure oil supply channel, the other end of the connecting section is movably installed in the sealing hole and has a gap with the sealing hole, the sealing section is closer to the high pressure area relative to the connecting section, and when the sealing section abuts against the periphery of the sealing hole, the other end of the connecting section extends into the back pressure cavity; The back pressure oil supply mechanism further includes: a fixing member, the sealing hole being disposed within the fixing member, the fixing member being disposed in the back pressure oil supply channel, and the diameter of the sealing section being larger than the diameter of the sealing hole; The opening angle range of the back pressure oil supply mechanism is 2A. Circle O1 represents the tail end face of the circular moving disc bearing housing, with a radius of r. O1 The center of circle O2 represents the center of the circle around which the eccentric part of the crankshaft drives the rear end face of the bearing housing to rotate eccentrically, and the eccentricity of the eccentric part of the crankshaft is the radius r of circle O2. O2 Circle O3 represents the outer circle at the other end of the connecting section that contacts the tail end face of the moving disc bearing, with a radius of r. O3 The distance between the center of circle O2 and the center of circle O3 is d. 23 .

2. The main support base according to claim 1, characterized in that, The other end of the connecting segment is curved.

3. The main support base according to claim 1, characterized in that, The side of the connecting section is provided with at least one limiting section to restrict the radial movement of the seal.

4. The main support base according to claim 1, characterized in that, The back pressure oil supply mechanism further includes a reset elastic element, which is installed in the back pressure oil supply channel. One end of the reset elastic element abuts against the main support seat, and the other end of the reset elastic element abuts against the sealing section.

5. The main support seat according to claim 4, characterized in that, The back pressure oil supply channel includes a multi-stage stepped hole, which includes a first-stage stepped hole, a second-stage stepped hole, and a third-stage stepped hole arranged sequentially along the oil supply direction. The diameters of the first-stage stepped hole, the second-stage stepped hole, and the third-stage stepped hole increase sequentially. The fixing member is disposed in the third-stage stepped hole, the sealing member is disposed in the second-stage stepped hole, and one end of the reset elastic member is disposed in the first-stage stepped hole.

6. The main support base according to claim 1, characterized in that, A sealing elastic element and a sealing ring separating the high-pressure area and the back pressure cavity are provided between the back of the moving scroll disk and the main support. One end of the sealing elastic element abuts against the main support, and the other end of the sealing elastic element abuts against the sealing ring.

7. A compressor, characterized in that, It includes a main support and a rotating scroll plate that can rotate on the main support, wherein the main support is the main support as described in any one of claims 1-6.

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