Stationary scroll axial flexible anti-tipping compressor

Abstract

The present application relates to the technical field of compressor, especially to a fixed scroll axial flexible scroll compressor. The distance between the outer circumferential part R of the tooth end of the fixed scroll scroll blade and the center of the main support part accounts for 30% to 40% of the shell diameter D; the cooperation width K between the outer circle through hole of the fixed scroll and the exposed length L of the cylindrical steel pin accounts for 70% to 90% of the exposed length L of the cylindrical steel pin. The diameter of the shell ranges between Ф160mm to Ф180mm. The technical scheme of the present application solves the problem of the fixed scroll axial floating prone to overturning in the prior art.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and in particular to a fixed-scroll axial flexible scroll compressor. Background Technology

[0002] Existing hermetic scroll compressors have a partition plate in the pressure vessel, and within the low-pressure chamber separated by the partition plate, there are stationary and moving scrolls, as well as an electric actuator that drives the moving scroll. The refrigerant is compressed by the meshing of the stationary and moving scroll blades, and finally discharged into the high-pressure chamber through the exhaust port in the center of the stationary scroll. Because the stationary and moving scrolls are located on the low-pressure side, they generate forces in opposite directions during operation. To ensure the airtightness of the compression chamber, it is preferable to apply back pressure to either the moving or stationary scroll, causing their tooth tips to seal and improving compression efficiency.

[0003] However, in this method, the fixed vortex may sometimes overturn due to the force of the gas in the compression chamber.

[0004] In view of the problems existing in the above-mentioned existing technologies, it is necessary to research and design a new type of fixed-scroll axial flexible anti-tipping compressor to overcome the problems existing in the existing technologies. Summary of the Invention

[0005] To address the technical problem of overturning caused by axial floating of a fixed vortex compressor, a fixed vortex axial flexible anti-overturning compressor is provided.

[0006] The technical means employed in this invention are as follows: A fixed-scroll axially flexible anti-tipping compressor includes a sealed container formed by welding an upper cover, a lower cover, and a shell; a high-low pressure isolation assembly is provided at the upper part of the sealed container to divide a high-pressure space and a low-pressure space; a main support component is strongly connected to the upper middle part of the shell by welding; a floating mechanism is provided between the high-low pressure isolation assembly and the main support component; the floating mechanism consists of a moving scroll, a fixed scroll, and a cross ring to prevent the moving scroll from rotating; the scroll blades of the fixed scroll and the moving scroll cooperate to form a compression chamber; the fixed scroll is connected to the main support component by a cylindrical steel pin, which restricts the fixed scroll in the circumferential and radial directions; the moving scroll floats axially with the high-low pressure isolation assembly; the floating mechanism and the main support component are located within the low-pressure space; an annular channel is machined on the upper surface of the fixed scroll, and the high-low pressure isolation plate assembly seals the annular channel; Furthermore, the distance between the outer periphery R of the fixed vortex blade tooth tip and the center of the main support component accounts for 30% to 40% of the shell diameter D; by applying back pressure to the fixed vortex, the anti-overturning torque generated by the contact between the fixed vortex and the moving vortex can be increased, which can make the fixed vortex operate more stably, while meeting the size requirements of the cylindrical steel pin.

[0007] Furthermore, the fit width K between the outer circular through hole of the fixed vortex and the cylindrical steel pin accounts for 70% to 90% of the exposed length L of the cylindrical steel pin. Based on this structural relationship, the point of convergence of the radial and tangential gas forces generated by the meshing of the fixed and moving vortexes is within the range of K. The width K covers 70% to 90% of the exposed cylindrical steel pin, preventing point contact and reducing the risk of jamming when the fixed vortex floats axially. This relationship also effectively provides line contact space, preventing the fixed vortex from overturning.

[0008] Furthermore, the diameter of the housing ranges from Ф160mm to Ф180mm; if the diameter is too small, it is not conducive to the setting of the cylindrical steel pin, the anti-overturning torque of the fixed vortex is insufficient, and it is easy to cause the fixed vortex to overturn. If the diameter is too large, it is easy to cause the high and low partition assembly to be inaccurate in centering, which will cause the fixed vortex to tilt due to the structure of the partition assembly, resulting in reduced energy efficiency and also making the fixed vortex prone to overturning.

[0009] Furthermore, the main body of the high-low voltage isolation assembly is a high-low voltage isolation plate set above the fixed vortex, and its lower end face is provided with a limiting groove for restricting the axial movement of the fixed vortex. Furthermore, an annular fixing ring is fixedly connected to the lower surface of the high and low voltage isolation plate, and the lower end of the annular fixing ring extends into the interior of the annular channel; there is a gap between the lower end face of the annular fixing ring and the bottom of the annular channel. Furthermore, the annular fixing ring has a convex structure, and a first sealing ring and a second sealing ring are respectively assembled between the inner and outer edges of the upper surface of the lower protrusion and the high and low pressure isolation plate; Furthermore, the outer edge of the first sealing ring is located between the annular fixing ring and the inner wall of the annular channel; Furthermore, the outer edge of the second sealing ring is located between the inner wall of the annular channel and the high and low pressure isolation plate.

[0010] Furthermore, the inner and outer edges of the upper end face of the annular fixing ring are machined with tiny protrusions, which are used to compress the first sealing ring and the second sealing ring, respectively, to achieve a better sealing effect.

[0011] Furthermore, the high and low pressure isolation components and the annular channel form a medium pressure chamber.

[0012] Furthermore, a medium-pressure hole communicating with the compression chamber is provided on the fixed vortex at the bottom of the medium-pressure chamber. Gas in the compression chamber enters the medium-pressure chamber through the medium-pressure hole, and under the action of gas pressure, the fixed vortex and the moving vortex are axially sealed.

[0013] Compared with the prior art, the present invention has the following advantages: 1. The fixed scroll axial flexible anti-tipping compressor provided by the present invention has a distance R between the outer periphery of the fixed scroll blade tooth tip and the center of the main support component that accounts for 30% to 40% of the shell diameter D. By applying back pressure to the fixed scroll, the anti-tipping torque generated by the contact between the fixed scroll and the moving scroll can be increased, which can make the fixed scroll run more stably, while meeting the size requirements of the cylindrical steel pin. 2. The fixed-scroll axially flexible anti-tipping compressor provided by this invention, through the mating width K of the fixed-scroll outer circular through hole and the cylindrical steel pin, accounts for 70% to 90% of the exposed length L of the cylindrical steel pin. This ensures that the resultant force of the radial and tangential gas forces generated by the meshing of the fixed and moving scrolls is within the range of K, and the width K covers 70% to 90% of the exposed cylindrical steel pin, avoiding point contact when the fixed scroll floats axially, thus preventing the risk of jamming. This relationship also effectively provides line contact space, preventing the fixed scroll from tipping over. 3. The fixed-scroll axial flexible anti-tipping compressor provided by this invention limits the diameter of the housing to between Ф160mm and Ф180mm. This facilitates the setting of cylindrical steel pins and prevents the high and low partition assemblies from becoming too large and thus ensuring energy efficiency and improving volumetric efficiency.

[0014] The combination of the above three factors can effectively reduce the risk of overturning in a fixed vortex. Furthermore, for an integrated partition structure, the shell diameter in this range is easier to process, resulting in higher positioning accuracy and lower processing costs.

[0015] In summary, the technical solution of this invention solves the problem of overturning that occurs easily when a fixed vortex floats axially in the prior art. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. 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.

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is an enlarged view of the separator ring assembly structure of the present invention; Figure 3 This is a diagram showing the combination of the fixed vortex and the moving vortex in this invention; Figure 4 This is a schematic diagram of the fixed vortex annular groove of the present invention.

[0018] Figure 5 This is a schematic diagram of the outer periphery of the fixed vortex tooth end of the present invention.

[0019] Figure 6 This is a schematic diagram showing the cooperation between the cylindrical steel pin, the fixed vortex, and the main support of the present invention.

[0020] In the figure: 1. Moving vortex 2. Fixed vortex 21. Annular channel 22. Medium pressure hole 3. Compression chamber 4. High and low pressure isolation assembly 41. High and low pressure isolation plate 42. First sealing ring 43. Second sealing ring 44. Annular fixing ring 5. Housing 6. Main support component 61. Cylindrical steel pin 7. Upper cover 8. Lower cover 9. Medium pressure chamber 10. Cross ring. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. 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.

[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0025] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0026] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0027] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0028] like Figure 1-6As shown, this invention provides a fixed-scroll axially flexible anti-tipping compressor, including a sealed container formed by welding an upper cover 7, a lower cover 8, and a shell 5; a high-low pressure isolation assembly 4 is provided at the upper part of the sealed container to divide a high-pressure space and a low-pressure space; a main support component 6 is strongly connected to the upper middle part of the shell 5 by welding; a floating mechanism is provided between the high-low pressure isolation assembly 4 and the main support component 6; the floating mechanism consists of a moving scroll 1, a fixed scroll 2, and a cross ring 10 to prevent the moving scroll 1 from rotating; the fixed scroll 2 and the scroll blades of the moving scroll 1 cooperate to form a compression chamber 3; the fixed scroll 2 is connected to the main support component 6 by a cylindrical steel pin 61, and the cylindrical steel pin 61 restricts the fixed scroll 2 in the circumferential and radial directions; the moving scroll 1 floats axially with the high-low pressure isolation assembly 4; the floating mechanism and the main support component 6 are located in the low-pressure space; an annular channel is machined on the upper surface of the fixed scroll 2, and the high-low pressure isolation plate assembly 4 seals the annular channel 21; like Figure 5 As shown, the distance R between the outer periphery of the blade tooth tip of the fixed vortex 2 and the center of the main support component 6 accounts for 30% to 40% of the diameter D of the shell 5; like Figure 6 As shown, the fit width K between the outer circular through hole of the fixed vortex 2 and the cylindrical steel pin 61 accounts for 70% to 90% of the exposed length L of the cylindrical steel pin 61.

[0029] like Figure 1 As shown, the diameter of the housing 5 ranges from Ф160mm to Ф180mm.

[0030] like Figure 2 As shown, the main body of the high-low pressure isolation assembly 4 is a high-low pressure isolation plate 41 disposed above the fixed vortex 2. A limiting groove for restricting the axial movement of the fixed vortex 2 is provided on its lower end face. An annular fixing ring 44 is fixedly connected to the lower end surface of the high-low pressure isolation plate 41. The lower end of the annular fixing ring 44 extends into the interior of the annular channel 21. There is a gap between the lower end face of the annular fixing ring 44 and the bottom of the annular channel 21. The annular fixing ring 44 has a convex structure. A first sealing ring 42 and a second sealing ring 43 are respectively assembled between the inner edge and the outer edge of the upper surface of the lower end protrusion and the high-low pressure isolation plate 41. The outer edge of the first sealing ring 42 is located between the annular fixing ring and the inner wall of the annular channel 21. The outer edge of the second sealing ring 43 is located between the inner wall of the annular channel 21 and the high-low pressure isolation plate 41.

[0031] like Figure 2 As shown, the inner and outer edges of the upper end face of the annular fixing ring 44 are machined with tiny protrusions, which are used to compress the first sealing ring 42 and the second sealing ring 43, respectively, to achieve a better sealing effect.

[0032] like Figure 2 As shown, the high and low pressure isolation assembly 4 and the annular channel 21 form the medium pressure chamber 9.

[0033] like Figure 2 As shown, a medium-pressure hole 22 communicating with a compression chamber 3 is provided on the fixed vortex 2 at the bottom of the medium-pressure chamber 9. The gas in the compression chamber 3 enters the medium-pressure chamber 9 through the medium-pressure hole 22. Under the action of gas pressure, the fixed vortex 2 and the moving vortex 1 are axially sealed.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fixed-scroll axial flexible anti-tipping compressor, comprising a sealed container formed by welding an upper cover (7), a lower cover (8), and a housing (5); a high-low pressure isolation assembly (4) is provided at the upper part of the sealed container to divide a high-pressure space and a low-pressure space; a main support component (6) is strongly connected to the upper middle part of the housing (5) by welding; a floating mechanism is provided between the high-low pressure isolation assembly (4) and the main support component (6); the floating mechanism consists of a moving scroll (1), a fixed scroll (2), and a cross ring (10) to prevent the moving scroll (1) from rotating; the fixed scroll... The vortex (2) and the vortex blades of the moving vortex (1) cooperate to form a compression cavity (3); the fixed vortex (2) is connected to the main support component (6) through a cylindrical steel pin (61), and the cylindrical steel pin (61) restricts the fixed vortex (2) in the circumferential and radial directions; the moving vortex (1) floats axially with the high and low pressure isolation component (4); the floating mechanism and the main support component (6) are set in the low pressure space; the upper surface of the fixed vortex (2) is machined with an annular channel, and the high and low pressure isolation component (4) seals the annular channel (21); characterized in that: The distance between the outer periphery R of the vortex blade tooth tip of the fixed vortex (2) and the center of the main support component (6) is 30% to 40% of the diameter D of the shell (5); The diameter of the shell (5) is between Ф160mm and Ф180mm; The fit width K between the outer circular through hole of the fixed vortex (2) and the cylindrical steel pin (61) accounts for 70% to 90% of the exposed length L of the cylindrical steel pin (61).

2. The fixed-scroll axially flexible anti-tipping compressor according to claim 1, characterized in that: The main body of the high and low voltage isolation assembly (4) is a high and low voltage isolation plate (41) set above the fixed vortex (2), and a limiting groove is provided on its lower end face to restrict the axial movement of the fixed vortex (2). The lower end surface of the high and low pressure isolation plate (41) is fixedly connected with an annular fixing ring (44), and the lower end of the annular fixing ring (44) extends into the interior of the annular channel (21); there is a gap between the lower end surface of the annular fixing ring (44) and the bottom of the annular channel (21); The ring-shaped fixing ring (44) has a convex structure, and a first sealing ring (42) and a second sealing ring (43) are respectively assembled between the inner edge and the outer edge of the upper surface of the lower end protrusion and the high and low pressure isolation plate (41). The outer edge of the first sealing ring (42) is located between the annular fixing ring and the inner wall of the annular channel (21); The outer edge of the second sealing ring (43) is located between the inner wall of the annular channel (21) and the high and low pressure isolation plate (41).

3. The fixed-scroll axially flexible anti-tipping compressor according to claim 2, characterized in that: The inner and outer edges of the upper end face of the ring-shaped fixing ring (44) are machined with tiny protrusions, which are used to squeeze the first sealing ring (42) and the second sealing ring (43) respectively to achieve a better sealing effect.

4. The fixed-scroll axially flexible anti-tipping compressor according to claim 1, characterized in that: The high and low pressure isolation components (4) and the annular channel (21) form a medium pressure cavity (9).

5. The fixed-scroll axially flexible anti-tipping compressor according to claim 4, characterized in that: The fixed vortex (2) at the bottom of the medium pressure chamber (9) is provided with a medium pressure hole (22) that communicates with the compression chamber (3). The gas in the compression chamber (3) enters the medium pressure chamber (9) through the medium pressure hole (22). Under the action of gas pressure, the fixed vortex (2) and the moving vortex (1) are axially sealed.

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