Fixed scroll axial flexible anti-overturning compressor

Abstract

The invention relates to the technical field of compressors, in particular to a fixed scroll axial flexible scroll compressor. The distance between the periphery R of the tooth end of a fixed vortex blade and the center of a main supporting component accounts for 30%-40% of the diameter D of a shell; and the matching width K of the excircle through hole of the fixed scroll and the cylindrical steel pin accounts for 70%-90% of the exposed length L of the cylindrical steel pin. The diameter of the shell ranges from phi 160 mm to phi 180 mm. According to the technical scheme, the problem that in the prior art, a fixed vortex axially floats and is prone to overturning is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a fixed scroll axially flexible scroll compressor. Background Art

[0002] Existing hermetic scroll compressors feature a partition plate within a pressure vessel. Within the low-pressure chamber separated by the partition plate are located a fixed scroll, an orbiting scroll, and an electric component driving the orbiting scroll. Refrigerant is compressed by the meshing blades of the fixed and orbiting scrolls, ultimately discharging into the high-pressure chamber through the exhaust port at the center of the fixed scroll. Because the fixed and orbiting scrolls are positioned adjacent to the low-pressure chamber, they generate a force moving away from each other during operation. To maintain the tightness of the compression chamber, back pressure is preferably applied to either the orbiting or fixed scroll, promoting a seal between the tooth tips and improving compression efficiency.

[0003] However, in this method, the fixed scroll 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 prior art, it is very necessary to research and design a new type of fixed scroll axially flexible anti-overturning compressor to overcome the problems existing in the prior art. Summary of the Invention

[0005] In view of the technical problem in the prior art that the fixed scroll is prone to overturning due to axial floating, a fixed scroll axially flexible anti-overturning compressor is provided.

[0006] The technical means adopted in the present invention are as follows: A fixed scroll axially flexible anti-overturning compressor comprises a sealed container formed by welding an upper cover, a lower cover and a shell; a high-low pressure isolation assembly is provided on the upper part of the sealed container to divide the high-pressure space and the low-pressure space; the middle and upper part of the shell is strongly connected to the main support component by a welding process; a floating mechanism is provided between the high-low pressure isolation assembly and the main support component; the floating mechanism is composed of an orbiting scroll, a fixed scroll and a cross ring to prevent the orbiting scroll from rotating; the fixed scroll and the vortex blades of the orbiting scroll cooperate with each other to form a compression chamber; the fixed scroll is connected to the main support component by a cylindrical steel pin, and the cylindrical steel pin restricts the fixed scroll in the circumferential direction and the radial direction; the orbiting scroll floats in the axial direction with the high-low pressure isolation assembly; the floating mechanism and the main support component are arranged in the low-pressure space; an annular channel is processed 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 scroll blade tooth end and the center of the main support component accounts for 30% to 40% of the shell diameter D; based on such a structural relationship, the contact range between the fixed scroll blade teeth and the movable scroll can be increased as much as possible, and by applying back pressure to the fixed scroll, the anti-overturning torque generated by the contact between the fixed scroll and the movable scroll can be increased, which can make the fixed scroll operate more stably and meet the size requirements of the cylindrical steel pin setting.

[0007] Furthermore, the width K of the fixed scroll's outer through-hole and the cylindrical steel pin accounts for 70% to 90% of the cylindrical steel pin's exposed length L. This structural relationship ensures that the point where the resultant radial and tangential gas forces generated by the meshing of the fixed and orbiting scrolls meet within the K value range, with the width K covering 70% to 90% of the exposed cylindrical steel pin. This prevents point contact and the increased risk of jamming when the fixed scroll floats axially. This relationship effectively provides linear contact space, preventing the fixed scroll from tipping over.

[0008] Furthermore, the housing diameter ranges from 160mm to 180mm. A diameter that is too small will hinder the placement of the cylindrical steel pin, resulting in insufficient anti-overturning torque for the fixed scroll and a tendency to overturn the fixed scroll. A diameter that is too large will easily misalign the high and low baffle assemblies, causing the fixed scroll to tilt due to the baffle assembly structure, reducing energy efficiency and making it more likely to overturn.

[0009] Furthermore, the main body of the high and low pressure isolation assembly is a high and low pressure isolation plate arranged above the fixed scroll, and a limit groove is provided on the lower end surface thereof for limiting the axial movement of the fixed scroll; Furthermore, an annular fixing ring is fixedly connected to the lower end 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 surface of the annular fixing ring and the bottom of the annular channel; Furthermore, the annular fixing ring is a convex-shaped structure, and a first sealing ring and a second sealing ring are respectively installed between the inner edge and the outer edge of the upper end surface of the lower end boss and the high and low pressure isolation plates; 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 plates.

[0010] Furthermore, tiny protrusions are processed on the inner edge and outer edge of the upper end surface of the annular fixing ring, which are used to squeeze 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 scroll at the bottom of the medium-pressure chamber. The gas in the compression chamber enters the medium-pressure chamber through the medium-pressure hole. Under the action of gas pressure, the fixed scroll and the movable scroll are axially sealed.

[0013] Compared with the prior art, the present invention has the following advantages: 1. In the fixed scroll axially flexible anti-overturning compressor provided by the present invention, the distance between the outer periphery R of the fixed scroll blade tooth tip and the center of the main support component accounts for 30% to 40% of the casing diameter D. This increases the contact range between the fixed scroll blade teeth and the orbiting scroll. By applying back pressure to the fixed scroll, the anti-overturning torque generated by the contact between the fixed scroll and the orbiting scroll can be increased, making the fixed scroll operate more stably while meeting the dimensional requirements for the cylindrical steel pin. 2. The fixed scroll axially flexible anti-overturning compressor provided by the present invention has a width K that occupies 70% to 90% of the exposed length L of the cylindrical steel pin through the outer circular through hole of the fixed scroll and the cylindrical steel pin. This ensures that the point of the resultant force of the radial gas force and the tangential gas force generated by the meshing of the fixed scroll and the movable scroll is within the K value range, and the width K covers 70% to 90% of the exposed cylindrical steel pin, avoiding point contact when the fixed scroll floats axially, which increases the risk of jamming. Such a relationship can effectively provide a linear contact space to prevent the fixed scroll from overturning; 3. The fixed scroll axially flexible anti-overturning compressor provided by the present invention limits the casing diameter to between 160 mm and 180 mm. This facilitates the placement of cylindrical steel pins and prevents the high and low baffles from being too large to be easily centered, thereby ensuring energy efficiency and improving volumetric efficiency.

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

[0015] In summary, the technical solution of the present invention solves the problem in the prior art that the fixed scroll is prone to overturning due to axial floating. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 It 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 coordination of the fixed vortex and the movable vortex of the present invention; Figure 4 Schematic diagram of the fixed vortex annular groove of the present invention.

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

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

[0020] In the figure: 1, movable scroll 2, fixed scroll 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, shell 6, main support component 61, cylindrical steel pin 7, upper cover 8, lower cover 9, medium pressure chamber 10, cross ring. DETAILED DESCRIPTION It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0024] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0025] For ease of description, spatially relative terms such as "above," "above," "on the upper surface of," and "above" may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "on top of" another device or structure would then be positioned as "below" or "below" the other device or structure. Thus, the exemplary term "above" may include both the orientations of "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used herein should be interpreted accordingly.

[0026] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0027] like Figure 1-6As shown, the present invention provides a fixed scroll axially flexible anti-overturning compressor, comprising 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 on the upper part of the sealed container to divide the high-pressure space and the low-pressure space; the middle and upper part of the shell 5 is strongly connected with the main support component 6 by a welding process; a floating mechanism is provided between the high-low pressure isolation assembly 4 and the main support component 6; the floating mechanism is composed of a movable scroll 1, a fixed scroll 2 and a cross ring 10 to prevent the movable scroll 1 from rotating; the fixed scroll 2 and the vortex blades of the movable scroll 1 cooperate with each other 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 direction and the radial direction; the movable scroll 1 floats in the axial direction between the high-low pressure isolation assembly 4; the floating mechanism and the main support component 6 are arranged in the low-pressure space; the upper surface of the fixed scroll 2 is processed with an annular channel, and the high-low pressure isolation plate assembly 4 seals the annular channel 21; like Figure 5 As shown, the distance between the outer periphery R of the tooth tip of the vortex blade 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 housing 5; like Figure 6 As shown, the matching width K between the outer circular through hole of the fixed scroll 2 and the cylindrical steel pin 61 accounts for 70% to 90% of the exposed length L of the cylindrical steel pin 61.

[0028] like Figure 1 As shown, the diameter of the housing 5 ranges from Ø160 mm to Ø180 mm.

[0029] like Figure 2 As shown, the main body of the high and low pressure isolation assembly 4 is a high and low pressure isolation plate 41 arranged above the fixed scroll 2, and the lower end surface of the high and low pressure isolation plate 41 is provided with a limit groove for limiting the axial movement of the fixed scroll 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 annular fixing ring 44 is a convex structure, and the inner edge and outer edge of the upper end surface of the lower end boss are respectively equipped with a first sealing ring 42 and a second sealing ring 43; 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.

[0030] like Figure 2 As shown, the inner edge and outer edge of the upper end surface of the annular fixing ring 44 are processed 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.

[0031] like Figure 2 As shown, the high and low pressure isolation assembly 4 and the annular channel 21 form a medium pressure chamber 9 .

[0032] like Figure 2 As shown, a medium-pressure hole 22 communicating with the compression chamber 3 is provided on the fixed scroll 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 the gas pressure, the fixed scroll 2 and the movable scroll 1 are axially sealed.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements 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 axially flexible anti-overturning compressor, comprising 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) for dividing a high-pressure space and a low-pressure space is provided on the upper part of the sealed container; a main support component (6) is strongly connected to the middle and upper part of the shell (5) by a welding process; 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 movable scroll (1), a fixed scroll (2) and a cross ring (10) for preventing the movable scroll (1) from rotating; the fixed scroll (2) cooperates with the vortex blades of the movable vortex (1) to form a compression chamber (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 direction and the radial direction; the movable vortex (1) floats in the axial direction with the high and low pressure isolation assembly (4); the floating mechanism and the main support component (6) are arranged in the low pressure space; the upper surface of the fixed vortex (2) is processed with an annular channel, and the high and low pressure isolation plate assembly (4) seals the annular channel (21); it is characterized in that: The distance between the outer peripheral portion R of the tooth tip of the vortex blade of the fixed vortex (2) and the center of the main support component (6) is 30% to 40% of the diameter D of the housing (5); The matching width K between the outer circular through hole of the fixed scroll (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-overturning compressor according to claim 1, characterized in that: The diameter of the housing (5) ranges from Φ160 mm to Φ180 mm.

3. The fixed scroll axially flexible anti-overturning compressor according to claim 1, characterized in that: The main body of the high-low pressure isolation assembly (4) is a high-low pressure isolation plate (41) arranged above the fixed scroll (2), and the lower end surface of the high-low pressure isolation plate is provided with a limiting groove for limiting the axial movement of the fixed scroll (2); The lower end surface of the high and low pressure isolation plate (41) is fixedly connected to an annular fixing ring (44), and the lower end of the annular fixing ring (44) extends into the interior of the annular channel (21); a gap is provided between the lower end surface of the annular fixing ring (44) and the bottom of the annular channel (21); The annular fixing ring (44) is a convex-shaped structure, and a first sealing ring (42) and a second sealing ring (43) are respectively installed between the inner edge and the outer edge of the upper end surface of the lower end boss 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).

4. The fixed scroll axially flexible anti-overturning compressor according to claim 3, characterized in that: The inner edge and outer edge of the upper end surface of the annular fixing ring (44) are processed 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.

5. The fixed scroll axially flexible anti-overturning 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 chamber (9).

6. The fixed scroll axially flexible anti-overturning compressor according to claim 5, characterized in that: A medium-pressure hole (22) communicating with the 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 the gas pressure, the fixed vortex (2) and the movable vortex (1) are axially sealed.

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