Oil absorption sealing structure and compressor
Patent Information
- Application Number
- CN202522317819.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-10-31
AI Technical Summary
但生产实际平面度形位公差及轴向尺寸波动、不同批次材料差异等原因该处存在间隙，排出的高压气体通过该处泄漏，一方面会弱化建立压差进程，泄漏气体产生气泡连同油一起达到摩擦副，气泡会蒸发带走油膜使得油膜建立不充分，会造成摩擦副干摩擦；另一方面泄漏的气体冲击曲轴短轴吸油效果，影响吸油量，尤其是卧式吸油罩结构，泄漏的高压气体冲击吸油管，持续破坏曲轴进油口与出油口建立的负压，使得无法上油成功
[0018]本实用新型提供了一种吸油密封结构及压缩机。吸油密封结构包括：下缸盖、消音器和密封圈，消音器罩设于下缸盖，下缸盖包括主体和颈部，颈部固定于主体，消音器包括第一连接部和第二连接部，第一连接部沿第二连接部背离主体的方向延伸，并套设于颈部，第二连接部与主体固定连接，以使主体、第二连接部与部分颈部共同围设形成消音腔，颈部与第一连接部间隙配合，颈部与第一连接部之间的间隙长度为0.1mm-2mm，密封圈设置于颈部与第一连接部之间，且密封圈的内圈与颈部的外壁相抵，密封圈的外圈与第一连接部的内壁相抵。相较于现有技术，该吸油密封结构避免传统消音器凸环部过盈造成下缸盖端面变形，降低压缩机功耗或泵体回转不良问题，同时，避免高压气体泄漏造成油与冷媒混合液产生大量气泡，提高了压缩机的可靠性和密封性。
Smart Images
Figure CN224919401U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of compressor technology, and in particular to an oil suction sealing structure and a compressor. Background Technology
[0002] The lower cylinder head end face and the housing's raised ring are in a line contact seal fit. The other stepped end face of the housing is fixed with bolts. Ideally, there is no gap between the oil suction shroud's raised ring and the lower cylinder head end face, and the interference fit is small enough not to cause deformation of the lower cylinder head. However, due to actual production factors such as flatness and dimensional tolerances, axial dimension fluctuations, and material differences between different batches, gaps exist at this point. The high-pressure gas discharged leaks through this point, which weakens the pressure differential establishment process. The leaked gas generates bubbles that, along with the oil, reach the friction pair. The bubbles evaporate and carry away the oil film, resulting in insufficient oil film establishment and causing dry friction between the friction pair. On the other hand, the leaked gas impacts the crankshaft's short shaft oil suction effect, affecting the oil suction volume. Especially in horizontal oil suction shroud structures, the leaked high-pressure gas impacts the oil suction pipe, continuously disrupting the negative pressure established between the crankshaft's oil inlet and outlet, making it impossible to successfully apply oil.
[0003] In existing technologies, the usual solution is to increase the axial interference fit between the lower muffler convex ring and the lower cylinder head end face. However, under the bolt tightening torque, the convex ring will squeeze the lower cylinder head end face, causing the lower cylinder head to bulge inward, resulting in poor pump operation or even blockage.
[0004] Therefore, there is an urgent need for an oil-absorbing sealing structure and compressor to solve the above-mentioned technical problems. Utility Model Content
[0005] The purpose of this invention is to propose an oil suction sealing structure and compressor that can prevent deformation of the lower cylinder head and improve the reliability and sealing performance of the compressor.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] An oil-absorbing sealing structure includes: a lower cylinder head, a muffler, and a sealing ring. The muffler is fitted over the lower cylinder head, which includes a main body and a neck. The neck is fixed to the main body. The muffler includes a first connecting portion and a second connecting portion. The first connecting portion extends along the second connecting portion in a direction away from the main body and is fitted onto the neck. The inner wall of the second connecting portion is interference-fitted to the outer wall of the main body, so that the main body, the second connecting portion, and part of the neck together form a muffler cavity. The sealing ring is spaced apart along the axial direction of the neck between the neck and the first connecting portion, with the inner ring of the sealing ring abutting against the outer wall of the neck and the outer ring of the sealing ring abutting against the inner wall of the first connecting portion.
[0008] As a preferred embodiment of the above-mentioned oil-absorbing sealing structure, a plurality of sealing rings are provided and spaced apart along the axial direction of the neck.
[0009] As a preferred embodiment of the above-mentioned oil-absorbing sealing structure, the first connecting portion is provided with an opening, and the opening extends beyond the end face of the neck.
[0010] As a preferred technical solution of the above-mentioned oil-absorbing sealing structure, the oil-absorbing sealing structure further includes an oil-absorbing cover and an oil-absorbing pipe. The oil-absorbing cover is sealed to the opening so that an oil storage cavity is formed between the oil-absorbing cover and the first connecting part. The oil-absorbing pipe is inserted into the oil-absorbing cover and communicates with the oil storage cavity.
[0011] As a preferred embodiment of the above-mentioned oil-absorbing sealing structure, the outer wall of the neck is provided with an annular groove, and the sealing ring is disposed in the annular groove.
[0012] As a preferred technical solution of the above-mentioned oil-absorbing sealing structure, the depth of the annular groove is H, the width of the annular groove is B, the diameter of the sealing ring is d, and the compression ratio of the sealing ring is W, wherein 1.2d≤B≤1.3d, W=(dH) / d, and 10%≤W≤15%.
[0013] As a preferred embodiment of the above-mentioned oil-absorbing sealing structure, the length of the annular groove from the end face of the neck away from the main body is greater than 0.5 mm.
[0014] As a preferred technical solution of the above-mentioned oil-absorbing sealing structure, the distance between the top of the muffler and the end face of the main body is L, and the height of the neck is l, wherein 2mm≤Ll≤7mm.
[0015] As a preferred technical solution of the above-mentioned oil-absorbing sealing structure, the sealing ring is made of rubber.
[0016] A compressor includes a cylinder, and the compressor further includes an oil suction sealing structure as described in any of the preferred embodiments above, the oil suction sealing structure being disposed at the end of the cylinder.
[0017] The beneficial effects of this utility model are:
[0018] This utility model provides an oil suction sealing structure and a compressor. The oil suction sealing structure includes a lower cylinder head, a muffler, and a sealing ring. The muffler covers the lower cylinder head, which includes a main body and a neck. The neck is fixed to the main body. The muffler includes a first connecting part and a second connecting part. The first connecting part extends along the direction away from the main body from the second connecting part and is fitted onto the neck. The second connecting part is fixedly connected to the main body, so that the main body, the second connecting part, and part of the neck together form a muffler cavity. The neck and the first connecting part are clearance-fitted, with a clearance length of 0.1mm-2mm. The sealing ring is disposed between the neck and the first connecting part, with the inner ring of the sealing ring abutting against the outer wall of the neck, and the outer ring of the sealing ring abutting against the inner wall of the first connecting part. Compared with the prior art, this oil suction sealing structure avoids the deformation of the lower cylinder head end face caused by the interference of the convex ring of the traditional muffler, reducing compressor power consumption or pump body rotation problems. At the same time, it avoids the generation of a large number of bubbles in the oil and refrigerant mixture due to high-pressure gas leakage, thus improving the reliability and sealing performance of the compressor. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the oil-absorbing sealing structure provided in Embodiment 1 of this utility model;
[0021] Figure 2 This is a first structural cross-sectional view of the oil-absorbing sealing structure provided in Embodiment 1 of this utility model;
[0022] Figure 3 This is a cross-sectional view of the oil-absorbing sealing structure provided in Embodiment 2 of this utility model;
[0023] Figure 4 This is a schematic diagram of the sealing structure provided in an embodiment of the present invention;
[0024] Figure 5 This is a second structural cross-sectional view of the oil-absorbing sealing structure provided in Embodiment 1 of this utility model.
[0025] In the picture:
[0026] 1. Lower cylinder head; 11. Main body; 12. Neck; 121. Annular groove; 2. Muffler; 21. First connecting part; 22. Second connecting part; 221. Annular protrusion; 3. Sealing ring; 4. Oil suction cover. Detailed Implementation
[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0030] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0031] like Figures 1 to 5As shown, this utility model provides an oil suction sealing structure and a compressor. The oil suction sealing structure includes: a lower cylinder head 1, a muffler 2, and a sealing ring 3. The muffler 2 covers the lower cylinder head 1. The lower cylinder head 1 includes a main body 11 and a neck 12. The neck 12 is fixed to the main body 11. The muffler 2 includes a first connecting part 21 and a second connecting part 22. The first connecting part 21 extends along the second connecting part 22 away from the main body 11 and is fitted onto the neck 12. The second connecting part 22 is fixedly connected to the main body 11 so that the main body 11, the second connecting part 22, and part of the neck 12 together form a muffler cavity. The neck 12 and the first connecting part 21 are clearance-fitted, and the clearance length between the neck 12 and the first connecting part 21 is 0.1mm-2mm. The sealing ring 3 is disposed between the neck 12 and the first connecting part 21, and the inner ring of the sealing ring 3 abuts against the outer wall of the neck 12, and the outer ring of the sealing ring 3 abuts against the inner wall of the first connecting part 21. Compared to existing technologies, this oil suction sealing structure avoids the deformation of the lower cylinder head 1 end face caused by the interference of the convex ring of the traditional muffler 2, reducing compressor power consumption or pump body rotation problems. At the same time, it avoids the generation of a large number of bubbles in the oil and refrigerant mixture caused by high pressure gas leakage, thus improving the reliability of the compressor and improving the sealing performance.
[0032] Furthermore, both the first connecting part 21 and the second connecting part 22 are concentric cylinders. The second connecting part 22 fits with the plane of the main body 11 to form a sound-absorbing cavity, which plays a role in buffering and noise reduction. The first connecting part 21 fits with the outer diameter of the neck 12 with a small gap, the gap being between 0.1mm and 2mm, and together with the sealing gasket and the annular groove 121, they form a sealing structure. Optionally, a plurality of sealing rings 3 are provided and spaced apart along the axial direction of the neck 12 to improve the sealing performance.
[0033] Optionally, the first connecting portion 21 is provided with an opening that extends beyond the end face of the neck 12; the oil-absorbing sealing structure further includes an oil-absorbing cover 4 and an oil-absorbing pipe, the oil-absorbing cover 4 being sealed to the opening so that an oil storage cavity is formed between the oil-absorbing cover 4 and the first connecting portion 21, and the oil-absorbing pipe being inserted into the oil-absorbing cover 4 and communicating with the oil storage cavity. Specifically, as Figure 2 As shown, when the compressor is a horizontal compressor, the tail end of the first connecting part 21 is connected to the oil suction hood 4, which communicates with the oil storage chamber, thereby improving the oil pumping effect; as Figure 3 As shown, when the compressor is a vertical compressor, the tail of the first connection part 21 is open, and oil is pumped directly.
[0034] Optionally, the outer wall of the neck 12 is recessed with a plurality of annular grooves 121, each corresponding to a plurality of sealing rings 3. The sealing rings 3 are disposed within the annular grooves 121, which can improve the stability of the sealing rings 3, facilitate the installation of the sealing rings 3, and prevent the sealing rings 3 from falling off. Further, the sealing rings 3 are O-rings or annular gaskets.
[0035] Optionally, the cross-sectional shape of the annular groove 121 is rectangular, V-shaped, semi-circular, dovetail-shaped, or triangular. In this embodiment, the cross-sectional shape of the annular groove 121 is rectangular, the depth of the annular groove 121 is H, the width of the annular groove 121 is B, the diameter of the sealing ring 3 is d, and the compression ratio of the sealing ring 3 is W, where 1.2d≤B≤1.3d, W=(dH) / d, and 10%≤W≤15%. Specifically, d is the cross-sectional diameter of the sealing ring 3 in its free state. By adjusting the compression ratio W of the sealing ring 3, the depth of the annular groove 121 can be determined to be H.
[0036] Optionally, the annular groove 121, which is away from the main body 11, is longer than 0.5 mm from the end face of the neck 12 away from the main body 11. Specifically, as shown... Figure 2 As shown, the annular groove 121 is more than 0.5 mm long from the upper end face of the neck 12, which can prevent the sealing ring 3 from falling off the upper end face of the neck 12.
[0037] Optionally, the bottom of the second connecting part 22 is provided with an annular protrusion 221, the inner wall of the annular protrusion 221 is interference-fitted with the outer wall of the main body 11, the distance between the top of the muffler 2 and the end face of the main body 11 is L, and the height of the neck 12 is l, wherein 2mm≤Ll≤7mm. Specifically, the interference fit between the inner wall of the annular protrusion 221 and the outer wall of the main body 11 enables radial sealing between the second connecting part 22 and the main body 11, improving the sealing performance of the oil suction sealing structure and further improving the sealing performance of the compressor. The height fit between the muffler 2 and the neck 12 can improve the oil pumping effect.
[0038] Optionally, the sealing ring 3 is made of rubber. Specifically, the material of the sealing ring 3 needs to be heat-resistant and have stable compatibility with refrigerants and oils, preferably rubber, but not limited to rubber.
[0039] Optionally, to further improve sealing performance, the inner wall of the muffler 2 and the mating section of the ring groove 121 need to improve roundness and roughness. The materials for the muffler 2 and the lower cylinder head 1 are not limited to stretched sheet metal parts, precision-machined castings, or polymer materials.
[0040] This utility model also provides a compressor, including a cylinder, and the compressor also includes the oil suction sealing structure of any of the above embodiments, the oil suction sealing structure being disposed at the end of the cylinder, and the compressor also includes other essential components that constitute a compressor in the prior art.
[0041] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.
Claims
1. An oil-absorbing sealing structure, characterized in that, include: The cylinder head (1), muffler (2), and sealing ring (3) are provided. The muffler (2) covers the cylinder head (1). The cylinder head (1) includes a main body (11) and a neck (12). The neck (12) is fixed to the main body (11). The muffler (2) includes a first connecting part (21) and a second connecting part (22). The first connecting part (21) extends along the second connecting part (22) away from the main body (11) and is fitted onto the neck (12). The second connecting part (22) is fixedly connected to the main body (11) so that... The main body (11), the second connecting part (22), and part of the neck (12) together form a sound-absorbing cavity. The neck (12) and the first connecting part (21) are fitted with a clearance. The length of the clearance between the neck (12) and the first connecting part (21) is 0.1mm-2mm. The sealing ring (3) is disposed between the neck (12) and the first connecting part (21), and the inner ring of the sealing ring (3) abuts against the outer wall of the neck (12), and the outer ring of the sealing ring (3) abuts against the inner wall of the first connecting part (21).
2. The oil-absorbing sealing structure according to claim 1, characterized in that, The first connecting portion (21) is provided with an opening, and the opening extends beyond the end face of the neck (12).
3. The oil-absorbing sealing structure according to claim 2, characterized in that, The oil-absorbing sealing structure also includes an oil-absorbing cover (4) and an oil-absorbing pipe. The oil-absorbing cover (4) is sealed to the opening so that an oil storage cavity is formed between the oil-absorbing cover (4) and the first connecting part (21). The oil-absorbing pipe is inserted into the oil-absorbing cover (4) and communicates with the oil storage cavity.
4. The oil-absorbing sealing structure according to claim 1, characterized in that, The outer wall of the neck (12) is recessed with an annular groove (121), and the sealing ring (3) is disposed in the annular groove (121).
5. The oil-absorbing sealing structure according to claim 4, characterized in that, The sealing rings (3) are provided in a plurality of manner and are spaced apart along the axial direction of the neck (12). The annular grooves (121) are provided in a plurality of manner and correspond one-to-one with the sealing rings (3).
6. The oil-absorbing sealing structure according to claim 4, characterized in that, The depth of the annular groove (121) is H, the width of the annular groove (121) is B, the diameter of the sealing ring (3) is d, and the compression ratio of the sealing ring (3) is W, wherein 1.2d≤B≤1.3d, W=(dH) / d, and 10%≤W≤15%.
7. The oil-absorbing sealing structure according to claim 4, characterized in that, The length of the annular groove (121) from the end face of the neck (12) away from the body (11) is greater than 0.5 mm.
8. The oil-absorbing sealing structure according to any one of claims 1-7, characterized in that, The distance between the top of the muffler (2) and the end face of the main body (11) is L, and the height of the neck (12) is l, wherein 2mm≤Ll≤7mm.
9. The oil-absorbing sealing structure according to any one of claims 1-7, characterized in that, The sealing ring (3) is made of rubber.
10. A compressor, comprising a cylinder, characterized in that, The compressor further includes an oil suction sealing structure as described in any one of claims 1-9, wherein the oil suction sealing structure is disposed at the end of the cylinder.