Scroll compressor having an axially flexible seal floating structure

Abstract

The application provides a scroll compressor with an axially flexible sealing floating structure, comprising a scroll compressor body and a sealing floating structure, wherein the scroll compressor body comprises a base frame structure, a scroll structure and a high-low pressure partition plate, the high-low pressure partition plate is arranged on the base frame structure, and the scroll structure is arranged between the high-low pressure partition plate and the base frame structure; the sealing floating structure is an annular boss structure, the lower surface of the high-low pressure partition plate is provided with a floating groove matched with the annular boss structure, the annular boss structure is arranged between the high-low pressure partition plate and the scroll structure, the annular boss structure is rigidly connected to the upper surface of the scroll structure, and a floating cavity is formed between the annular boss structure and the high-low pressure partition plate, and the application mainly utilizes an annular buffer structure arranged between the fixed scroll and the compressor shell to achieve the effect of enabling the fixed scroll to axially move within a certain range, realizing flexible sealing and reducing the leakage between the scroll teeth.

Description

Technical Field

[0001] This invention relates to the field of scroll compressor manufacturing technology, and more particularly to a scroll compressor with an axially flexible sealing floating structure. Background Technology

[0002] The scroll compressor is a new type of positive displacement compressor developed in the 1970s. With its high efficiency, small size, light weight, low noise, simple structure and stable operation, it is widely used in various air conditioning and refrigeration units.

[0003] A typical scroll compressor mainly consists of a fixed scroll, a moving scroll, a crankshaft, a motor, and a housing. The fixed and moving scrolls have relatively eccentric scroll teeth that are 180° apart. The fixed scroll is mounted on a base to maintain its fixed position. One side of the moving scroll meshes with the fixed scroll, forming a series of crescent-shaped spaces inside. The center of the other side of the moving scroll contacts the crankshaft. The presence of the base and cross ring restricts the axial movement of the fixed scroll. The crankshaft rotates under the action of the motor, causing the moving scroll to revolve around the center of the fixed scroll without rotating on its own axis. During this motion, the crescent-shaped spaces gradually move towards the center and continuously shrink, eventually discharging the gas within the crescent-shaped spaces through the exhaust port of the fixed scroll, completing the compression process.

[0004] To improve compression efficiency and reduce radial leakage between the scroll teeth of the moving scroll and the scroll teeth of the stationary scroll, it is necessary to design a scroll compressor with an axially flexible sealing floating structure. Summary of the Invention

[0005] To address the aforementioned technical problems of low compression efficiency and severe radial leakage between the stationary and moving scrolls in existing scroll compressors, this invention provides a scroll compressor with an axially flexible sealing floating structure. The main feature of this invention is the inclusion of an annular buffer structure between the stationary scroll and the compressor housing. This allows the stationary scroll to move axially within a certain range, achieving a flexible seal and reducing leakage between the scroll teeth.

[0006] The technical means employed in this invention are as follows:

[0007] A scroll compressor with an axially flexible sealing floating structure is characterized in that it comprises: a scroll compressor body and a sealing floating structure. The scroll compressor body includes a base frame structure, a scroll structure, and high and low pressure partitions. The high and low pressure partitions are disposed on the base frame structure, and the scroll structure is disposed between the high and low pressure partitions and the base frame structure. The sealing floating structure is an annular boss structure. The lower surface of the high and low pressure partitions is provided with a floating groove that mates with the annular boss structure. The annular boss structure is disposed between the high and low pressure partitions and the scroll structure. The annular boss structure is rigidly connected to the upper surface of the scroll structure, and a floating cavity is formed between the annular boss structure and the high and low pressure partitions.

[0008] Furthermore, the cross-section of the annular boss structure is a T-shaped structure, the annular boss structure is provided with an axial vent hole penetrating the upper and lower end faces, the vortex structure is provided with a fixed vortex vent hole coaxial with the axial vent hole, the fixed vortex vent hole is connected to the axial vent hole, and the lower end of the annular boss structure is provided with a radially penetrating radial vent hole.

[0009] Furthermore, an inner sealing ring and an outer sealing ring are provided between the annular boss structure and the high and low pressure partition.

[0010] Furthermore, the base frame structure includes a shell and a base, the base being disposed inside the shell. The vortex structure includes a crankshaft, a moving vortex, a fixed vortex, and a cross ring. The middle part of the crankshaft is installed at the central hole of the base, the head of the crankshaft is nested in the back plate groove of the moving vortex, the cross ring is disposed between the moving vortex and the base, and the fixed vortex is disposed at the upper end of the moving vortex and meshes with the moving vortex.

[0011] Furthermore, the high and low pressure partition is provided with a partition center hole at the center, the upper end of the fixed vortex protrudes and is nested in the partition center hole, and a fixed vortex sealing ring is provided between the fixed vortex and the partition center hole.

[0012] Furthermore, the housing, the base, the fixed vortex, the annular boss structure, and the high and low pressure partition are coaxial.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. The present invention provides a scroll compressor with an axially flexible sealing floating structure. By setting an annular buffer structure between the fixed scroll and the compressor housing, the fixed scroll can move axially within a certain range to achieve flexible sealing and reduce leakage between the scroll teeth.

[0015] 2. The present invention provides a scroll compressor with an axially flexible sealing floating structure, which improves the compressor compression efficiency by reducing leakage between the moving scroll and the stationary scroll.

[0016] Based on the above reasons, this invention can be widely promoted in fields such as scroll compressor manufacturing technology. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a schematic diagram of the structure of a scroll compressor with an axially flexible sealing floating structure according to the present invention. Figure I .

[0019] Figure 2 This is a top view of the annular boss structure of a scroll compressor with an axially flexible sealing floating structure according to the present invention.

[0020] Figure 3 This is a cross-sectional view of the annular boss structure of a scroll compressor with an axially flexible sealing floating structure according to the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of a scroll compressor with an axially flexible sealing floating structure according to the present invention. Figure II .

[0022] In the diagram: 10, housing; 20, base; 30, crankshaft; 40, moving scroll; 50, cross ring; 60, fixed scroll; 61, fixed scroll vent; 70, structural sealing ring; 80, annular boss structure; 81, axial vent; 82, radial vent; 91, inner sealing ring; 92, outer sealing ring; 100, high and low pressure partition; 110, fixed scroll sealing ring; 120, bolt; 130, intake pipe. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] 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.

[0026] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] like Figure 1-4As shown, the present invention provides a scroll compressor with an axially flexible sealing floating structure, comprising: a scroll compressor body and a sealing floating structure. The scroll compressor body includes a base 20 frame structure, a scroll structure, and a high-low pressure partition 100. The high-low pressure partition 100 is disposed on the base 20 frame structure, and the scroll structure is disposed between the high-low pressure partition 100 and the base 20 frame structure. The sealing floating structure is an annular boss structure 80, and the lower surface of the high-low pressure partition 100 is provided with a floating structure that cooperates with the annular boss structure 80. A groove is formed between the high and low pressure partition 100 and the vortex structure. The annular boss structure 80 is rigidly connected to the upper surface of the vortex structure, and a floating cavity is formed between the annular boss structure 80 and the high and low pressure partition 100. The cross-section of the annular boss structure 80 is T-shaped. The annular boss structure 80 is provided with an axial vent hole 81 penetrating the upper and lower end faces. The vortex structure is provided with a fixed vortex vent hole 61 coaxial with the axial vent hole 81. The fixed vortex vent hole 61 and the axial vent hole 81 are connected. The annular boss structure 80 is connected to the high-low pressure partition plate 100, and the lower end of the annular boss structure 80 is provided with a radially penetrating radial vent hole 82. An inner sealing ring 91 and an outer sealing ring 92 are provided between the annular boss structure 80 and the high-low pressure partition plate 100. The base 20 frame structure includes a housing 10 and a base 20, with the base 20 disposed inside the housing 10. The vortex structure includes a crankshaft 30, a moving vortex 40, a fixed vortex 60, and a cross ring 50. The middle part of the crankshaft 30 is installed at the center hole of the base 20, and the head of the crankshaft 30 is nested in the back plate groove of the moving vortex 40. The cross ring 50 is disposed between the moving vortex 40 and the base 20, and the fixed vortex 60 is disposed at the upper end of the moving vortex 40 and meshes with the moving vortex 40; the high and low pressure partition 100 is provided with a partition center hole at its center, and the upper end of the fixed vortex 60 protrudes and is nested in the center hole of the high and low pressure partition 100; a fixed vortex sealing ring 110 is provided between the fixed vortex 60 and the partition center hole; the housing 10, the base 20, the fixed vortex 60, the annular boss structure 80 and the high and low pressure partition 100 are coaxial.

[0031] Example 1

[0032] like Figure 1As shown, this invention provides a scroll compressor with an axially flexible sealed floating structure. The base 20 is inside the housing 10, and the two are concentric and relatively fixed in position. The crankshaft 30 passes through the central hole of the base 20, and the head of the crankshaft 30 is nested in the groove at the center of the back plate of the moving scroll 40. A cross ring 50 is installed between the back plate of the moving scroll 40 and the base 20. The scroll teeth on the upper part of the moving scroll 40 mesh with the scroll teeth of the fixed scroll 60, forming several cavities. The cross ring 50, the moving scroll 40, and the fixed scroll 60 are placed sequentially from bottom to top in the circular groove of the base 20. An annular boss structure 80 is installed on the upper part of the fixed scroll 60. The fixed scroll 60 and the annular boss structure 80 are connected by bolts 120. The upper part of the annular boss structure 80 is placed in the annular groove of the high and low pressure partition 100. An inner sealing ring 91 and an outer sealing ring 92 are installed between the annular boss structure 80 and the high and low pressure partition 100, forming a space A. The central protrusion of the back of the fixed vortex 60 is nested in the central hole of the high and low pressure partition 100. The fixed vortex 60 and the high and low pressure partition 100 are sealed by a sealing ring 110. The cross-section of the annular boss structure 80 is circular, with a central hole that runs vertically through the center. The diameter of the central hole is larger than the diameter of the protrusion on the back of the fixed vortex 60. The upper and lower surfaces of the annular boss structure 80 are both flat. Three identical sizes are evenly distributed on the upper surface of the annular boss structure 80. The bolt holes are arranged such that an axial vent hole 81 is provided between two of the bolt holes, and a radial vent hole 82 is provided in the horizontal direction on the lower support leg of the annular boss structure 80, so that the inner ring of the annular boss structure 80 is connected to the outside. The height of the sliding part on both sides of the upper part of the annular boss structure 80 should be greater than the maximum allowable floating distance of the fixed vortex 60. The edge of the high and low pressure baffle 100 is installed on the shell 10. The lower end face of the high and low pressure baffle 100 has a floating groove at the corresponding position of the annular boss structure 80. The bottom surface of the floating groove is kept horizontal and the side wall is vertical. The depth of the floating groove of the high and low pressure baffle 100 should meet the following requirement: when the fixed vortex 60 is at the maximum allowable floating height, the upper end face of the annular boss structure 80 just squeezes the inner ring. The sealing ring 91 and the outer sealing ring 92 abut against the bottom of the floating groove of the high and low pressure partition 100; the inner sealing ring 91 and the outer sealing ring 92 installed in the groove of the high and low pressure partition 100, and the fixed vortex sealing ring 110 installed at the center hole of the high and low pressure partition 100, should have a vertical length greater than the maximum allowable floating distance of the fixed vortex 60; a fixed vortex vent hole 61 is opened on the back plate of the fixed vortex 60, one end of the fixed vortex vent hole 61 is connected to the intermediate pressure chamber of the vortex, and the other end penetrates the back plate of the fixed vortex 60; an axial vent hole 81 is opened on the annular boss structure 80, and the fixed vortex vent hole 61 of the fixed vortex 60 corresponds to the axial vent hole 81 of the annular boss structure 80 and is vertically connected.The bolt holes on the back plate of the fixed vortex 60 correspond one-to-one with the bolt holes on the annular boss structure 80; a flat structural sealing ring 70 is installed between the contact surfaces of the annular boss structure 80 and the fixed vortex 60. A through hole is opened at the connection between the fixed vortex vent hole 61 of the fixed vortex 60 and the axial vent hole 81 of the annular boss structure 80 on the structural sealing ring 70 to ensure that the two vent holes are connected; the centers of the shell 10, the base 20, the fixed vortex 60, the annular boss structure 80, and the high and low pressure partition 100 are kept coaxial.

[0033] This invention adds an annular boss structure 80, enabling the fixed vortex 60 to float. The lower end face of the annular boss structure 80 contacts the upper end face of the fixed vortex 60, and the two are fixed together by bolts 120. The space A enclosed by the annular boss structure 80 and the high-low pressure partition 100 is connected to the intermediate cavity of the vortex through a vent hole. A sealing ring 100 is installed between the annular boss 70 and the high-low pressure partition 110. A sealing ring 110 is installed between the protrusion of the fixed vortex 60 and the high-low pressure partition 100. Through holes 21 and 82 ensure that the portion below the high-low pressure partition 100, except for the interior of the vortex, remains connected. The bottom of the groove in the high-low pressure partition restricts the highest position of the annular boss structure 80, indirectly limiting the maximum floating of the fixed vortex 60.

[0034] When the compressor is running, the pressure in space A changes with the pressure in the intermediate chamber. Under the action of gas pressure, the annular boss structure 80 and the fixed vortex 60 are subjected to upward or downward forces. The upper boss of the base 20 serves as a guide for the axial movement of the fixed vortex 60, so that the fixed vortex 60 can only move along the axial direction.

[0035] Example 2

[0036] like Figure 4As shown, the present invention also provides a scroll compressor with an axially flexible sealed floating structure. The base 20 is inside the housing 10, and the two are concentric and relatively fixed in position. The crankshaft 30 passes through the central hole of the base 20, and the head of the crankshaft 30 is nested in the groove at the center of the back plate of the moving scroll 40. A cross ring 50 is installed between the back plate of the moving scroll 40 and the base 20. The scroll teeth on the upper part of the moving scroll 40 mesh with the scroll teeth of the fixed scroll 60, forming several cavities. The cross ring 50, the moving scroll 40, and the fixed scroll 60 are arranged sequentially from bottom to top. The upper annular protrusion of the fixed vortex 60 is placed in the circular groove of the base 20. The upper annular protrusion of the fixed vortex 60 is placed in the annular groove of the high and low pressure partition 100. An inner sealing ring 91 and an outer sealing ring 92 are installed between the upper annular protrusion of the fixed vortex 60 and the high and low pressure partition 100. A space A is formed between the upper annular protrusion of the fixed vortex 60 and the high and low pressure partition 100. The central protruding part of the back of the fixed vortex 60 is nested in the central hole of the high and low pressure partition 100. The fixed vortex 60 and the high and low pressure partition 100 are sealed by a fixed vortex sealing ring 110. The upper annular protrusion of the fixed vortex 60 has a circular cross-section, with a groove between the annular protrusion and the central protrusion. The upper surface of the annular protrusion is flat, and a vent hole is provided in the horizontal direction to connect the inner ring of the annular protrusion with the outside. The height of the sliding parts on both sides of the upper part of the annular protrusion should be greater than the maximum allowable floating distance of the fixed vortex 60. The edge of the high and low pressure baffle 100 is installed on the shell 10. A floating groove is opened at the position corresponding to the annular protrusion structure 80 on the lower end surface of the high and low pressure baffle 100. The bottom surface of the floating groove remains horizontal, and the side wall is vertical. The depth of the floating groove of the high and low pressure partition 100 should meet the following requirements: when the fixed vortex 60 is at the maximum allowable floating height, the upper end face of the annular protrusion on the upper part of the fixed vortex 60 just squeezes the inner sealing ring 91 and the outer sealing ring 92 and abuts against the bottom of the floating groove of the high and low pressure partition 100; the length of the inner sealing ring 91 and the outer sealing ring 92 installed in the floating groove of the high and low pressure partition 100 and the fixed vortex sealing ring 110 installed at the center hole of the high and low pressure partition 100 in the vertical direction should be greater than the maximum allowable floating distance of the fixed vortex 60.

[0037] The fixed vortex 60 has a fixed vortex vent 61 on its annular protrusion. One end of the fixed vortex vent 61 is connected to the medium pressure chamber of the vortex, and the other end penetrates the back plate and the annular protrusion of the fixed vortex 60. The fixed vortex vent 61 is open from top to bottom. The centers of the shell 10, the base 20, the fixed vortex 60, the annular protrusion structure 80, and the high and low pressure partition 100 are kept coaxial.

[0038] In this invention, the sealing ring 70, the annular boss structure 80, and the bolt 120 in Embodiment 1 are eliminated. Instead, a boss is added at the same position on the fixed vortex 60, so that the fixed vortex 60 and the annular boss structure 80 in Embodiment 1 are combined into a single component, the fixed vortex 60. The boss of the fixed vortex 60 is placed in the groove under the high and low pressure partition 100. Compared with Embodiment 1, this structure is simpler and can enable the fixed vortex 60 to move along the axial direction.

[0039] 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 scroll compressor with an axially flexible sealing floating structure, characterized in that, include: The compressor body comprises a scroll compressor main body and a sealing floating structure. The scroll compressor main body includes a base frame structure, a scroll structure, and high and low pressure baffles. The high and low pressure baffles are disposed on the base frame structure, and the scroll structure is disposed between the high and low pressure baffles and the base frame structure. The sealing floating structure is an annular boss structure. The lower surface of the high and low pressure baffles is provided with a floating groove that mates with the annular boss structure. The annular boss structure is disposed between the high and low pressure baffles and the scroll structure. The annular boss structure is rigidly connected to the upper surface of the scroll structure, and a floating cavity is formed between the annular boss structure and the high and low pressure baffles. The cross-section of the annular boss structure is T-shaped. The annular boss structure is provided with an axial ventilation hole that penetrates the upper and lower end faces. The vortex structure is provided with a fixed vortex ventilation hole that is coaxial with the axial ventilation hole. The fixed vortex ventilation hole is connected to the axial ventilation hole. The lower end of the annular boss structure is provided with a radially penetrating radial ventilation hole.

2. A scroll compressor with an axially flexible sealing floating structure according to claim 1, characterized in that, An inner sealing ring and an outer sealing ring are provided between the annular boss structure and the high and low pressure partition.

3. A scroll compressor with an axially flexible sealing floating structure according to claim 1, characterized in that, The base frame structure includes a shell and a base, with the base disposed inside the shell. The vortex structure includes a crankshaft, a moving vortex, a fixed vortex, and a cross ring. The middle part of the crankshaft is installed at the central hole of the base, and the head of the crankshaft is nested in the back plate groove of the moving vortex. The cross ring is disposed between the moving vortex and the base, and the fixed vortex is disposed at the upper end of the moving vortex and meshes with the moving vortex.

4. A scroll compressor with an axially flexible sealing floating structure according to claim 3, characterized in that, The high and low pressure partition is provided with a partition center hole at the center, the upper end of the fixed vortex protrudes and is nested in the partition center hole, and a fixed vortex sealing ring is provided between the fixed vortex and the partition center hole.

5. A scroll compressor with an axially flexible sealing floating structure according to claim 3, characterized in that, The housing, the base, the fixed vortex, the annular boss structure, and the high and low pressure partition are coaxial.

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