Pump body assembly and compressor
By setting an annular groove in the journal of the cylinder head and setting an embedded part in the housing of the muffler to form a seal, the problem of insufficient sealing between the muffler and the journal of the cylinder head is solved, and the reliability of the compressor is improved.
Patent Information
- Application Number
- CN202522368445.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-07
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-07
Smart Images
Figure CN224931844U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of compressor technology, specifically to a pump body assembly and a compressor. Background Technology
[0002] Currently, the seal between the muffler and the cylinder head journal of a rolling rotor compressor is achieved through a line seal between the convex ring on the muffler and the end face of the cylinder head journal. However, when the parallelism of the convex ring on the muffler is poor, a gap will exist between the end faces of the muffler and the cylinder head journal, which will cause gas leakage inside the muffler, affect the oil level, and reduce the reliability of the compressor. Utility Model Content
[0003] In view of the problems in the prior art, the purpose of this utility model is to provide a pump body assembly and compressor to improve the sealing between the cylinder head journal and the muffler and improve the reliability of the compressor.
[0004] This utility model embodiment provides a pump body assembly, including a cylinder, a cylinder head, and a muffler. The cylinder head is provided at both axial ends of the cylinder. The cylinder head includes a journal and an extension extending radially outward away from the journal. The muffler includes a hollow housing, and the journal is located inside the housing. An annular groove is provided on the end face of the journal away from the extension. The housing includes a first surrounding portion, a second surrounding portion, and an insert portion connected in sequence. The first surrounding portion is located on the outer side wall of the journal, the second surrounding portion is located on the outer side of the end face of the journal away from the extension, and at least a portion of the insert portion abuts against the inner groove wall and / or the outer groove wall of the annular groove.
[0005] In some embodiments, the journal has a central through hole, and the crankshaft of the pump body assembly is disposed in the central through hole; the outer diameter of the journal is D, the outer diameter of the annular groove is D1, the inner diameter of the annular groove is D2, and the inner diameter of the journal is D3, satisfying: D+D3≥D1+D2.
[0006] In some embodiments, the angle between the embedded part and the axial direction of the annular groove is θ, satisfying: -10°≤θ≤10°.
[0007] In some embodiments, at least a portion of the structure of the first end of the embedded portion away from the second surrounding portion contacts the inner groove wall of the annular groove, and at least a portion of the structure of the second end of the embedded portion contacts the outer groove wall of the annular groove.
[0008] In some embodiments, at least a portion of the structure of the first end of the embedded portion away from the second surrounding portion contacts the outer groove wall of the annular groove, and at least a portion of the structure of the second end of the embedded portion contacts the inner groove wall of the annular groove.
[0009] In some embodiments, the depth of the annular groove is H, satisfying: 1mm≤H≤2.5mm.
[0010] In some embodiments, the annular groove has a first rounded corner at the end near its outer groove wall and a second rounded corner at the end near its inner groove wall.
[0011] In some embodiments, the radius of the first fillet is R1, satisfying: 0mm≤R1≤0.5mm; the radius of the second fillet is R2, satisfying: 0mm≤R2≤0.5mm.
[0012] In some embodiments, the housing further includes a third surrounding portion connected to one end of the first surrounding portion away from the second surrounding portion and abutting against the outer wall of the extension portion.
[0013] This utility model provides a compressor, including the pump body assembly described above.
[0014] The pump assembly and compressor provided by this utility model have the following advantages:
[0015] By providing an annular groove in the journal of the cylinder head and an insert in the muffler housing, with at least a portion of the insert abutting against the inner and / or outer wall of the annular groove, a seal is formed between the insert and the annular groove. This arrangement increases the sealing area between the muffler and the journal, improves the sealing performance between the muffler and the journal, enhances the sealing reliability between the muffler and the journal, reduces gas leakage within the muffler, and improves the reliability of the compressor. Attached Figure Description
[0016] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.
[0017] Figure 1 This is a schematic diagram illustrating how the muffler and cylinder head journal achieve a seal in the existing technology;
[0018] Figure 2 This is a schematic diagram of a pump body assembly provided in an embodiment of the present invention;
[0019] Figure 3 This is a schematic diagram of a cylinder head provided in an embodiment of the present invention;
[0020] Figure 4 This is a schematic diagram of a silencer provided in one embodiment of the present invention;
[0021] Figure 5 This is a schematic diagram of a muffler provided in another embodiment of the present invention.
[0022] Figure label:
[0023] 10' Cylinder head 112 center through hole
[0024] 11' journal 12 extension
[0025] 20' muffler
[0026] 20a' Convex ring 21 First surrounding part
[0027] 10 Cylinder head 22 Second surround section
[0028] 11 Journal 23 Embedded part
[0029] 111 Annular groove 24 Third surrounding part Detailed Implementation
[0030] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.
[0031] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics represented in connection with that embodiment or example, which are included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate different embodiments or examples represented in this application, as well as features of different embodiments or examples.
[0032] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0033] It should be further understood that the terms "comprising" or "including" indicate the presence of a feature, step, operation, element, component, item, kind, and / or group, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" as used herein are interpreted as inclusive, or mean any one or any combination thereof. Therefore, "A, B, or C" or "A, B, and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B, and C." Exceptions to this definition only arise when a combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.
[0034] Figure 1 This diagram illustrates a prior art method for achieving a seal between the muffler and the cylinder head journal. (For example...) Figure 1 As shown, the convex ring 20a' on the muffler 20' has good parallelism, enabling it to make tight contact with the end face of the journal 11' of the cylinder head 10', thus sealing the gap between the muffler 20' and the journal 11'. However, when the parallelism of the convex ring 20a' of the muffler 20' is poor, a gap will exist between the end face of the muffler 20' and the journal 11', causing the gas (refrigerant) inside the muffler 20' to leak from the gap. This leaked gas will blow into and agitate the compressor's oil level, easily causing more lubricating oil to rise with the gas and be discharged outside the compressor. This results in a decrease in the compressor's oil level. Insufficient oil inside the compressor leads to increased frictional losses in the internal components, reducing the compressor's reliability.
[0035] To solve the above-mentioned technical problems, this utility model provides a pump body assembly. Figure 2 A schematic diagram of a pump body assembly according to an embodiment of the present invention is shown. Figure 2As shown, the pump assembly includes a cylinder (not shown), a cylinder head 10, and a muffler 20. The cylinder head 10 is located at both axial ends of the cylinder. Each cylinder head 10 includes a journal 11 and an extension 12 extending radially outward from the journal 11. The muffler 20 includes a hollow housing, with the journal 11 located inside the housing. An annular groove 111 is provided on the end face of the journal 11 facing away from the extension 12. The housing includes a first surrounding portion 21, a second surrounding portion 22, and an insert portion 23 connected sequentially. The first surrounding portion 21 is located on the outer side of the sidewall of the journal 11, and the second surrounding portion 22 is located on the outer side of the end face of the journal 11 facing away from the extension 12. At least a portion of the insert portion 23 abuts against the inner and / or outer groove wall of the annular groove 111. It should be noted that in this embodiment, a portion of the insert portion 23 abuts against the inner and outer groove wall of the annular groove 111, forming a seal between the insert portion 23 and the annular groove 111. However, in other embodiments, only a portion of the embedded part may abut against the inner or outer wall of the annular groove 111, thus forming a seal between the embedded part 23 and the annular groove 111.
[0036] Compared to existing technologies that rely solely on the convex ring on the muffler and the end face of the journal for sealing, this technical solution utilizes an annular groove 111 on the journal 11 of the cylinder head 10 and an embedded portion 23 on the housing of the muffler 20. At least a portion of the embedded portion 23 abuts against the inner and / or outer groove surfaces of the annular groove 111, thus creating a seal between the embedded portion 23 and the annular groove 111. This arrangement increases the sealing area between the muffler 20 and the journal 11, improves the sealing performance between them, enhances the sealing reliability, reduces gas leakage within the muffler 20, and improves the reliability of the compressor.
[0037] Figure 3 A schematic diagram of a cylinder head according to an embodiment of the present invention is shown. Further, as... Figure 3As shown, a central through hole 112 is provided on the journal 11, and the crankshaft of the pump body assembly is located in the central through hole 112. The outer diameter of the journal 11 is D, the outer diameter of the annular groove 111 is D1, the inner diameter of the annular groove 111 is D2, and the inner diameter of the journal 11 is D3, satisfying: D+D3≥D1+D2. By setting the relationship between the outer and inner diameters of the journal 11 and the inner and outer diameters of the annular groove 111, the installation accuracy of the cylinder head 10 and the crankshaft during assembly is ensured, thereby ensuring the integrity of the oil film between the crankshaft and the journal 11, reducing the friction loss of the crankshaft, and improving the reliability of the compressor. When the annular groove 111 is set too close to the central axis of the journal 11, it is easy to interfere with the fit between the cylinder head 10 and the crankshaft, thereby destroying the installation accuracy of the crankshaft, interrupting the continuity of the oil film, and aggravating the friction loss between the cylinder head 10 and the crankshaft. When the annular groove 111 is set to be a certain distance away from the central axis of the journal 11, the interference between the annular groove 111 and the journal 11 and the crankshaft can be reduced, ensuring the installation accuracy of the cylinder head 10 and the crankshaft and the integrity of the oil film, and reducing the friction loss of the crankshaft.
[0038] Figure 4 A schematic diagram of a silencer provided in an embodiment of the present invention is shown; Figure 5 A schematic diagram of a muffler provided according to another embodiment of the present invention is shown. Further, as... Figure 2 , Figure 4 and Figure 5 As shown, the angle between the axial direction of the embedded part 23 and the annular groove 111 is θ, satisfying: -10°≤θ≤10°. For example, as... Figure 2 As shown, the embedded part 23 is parallel to the axial direction of the annular groove 111, that is, θ = 0°. At this time, the embedded part 23 and the annular groove 111 are completely fitted together to form a surface seal with a large sealing area, thus effectively preventing gas from the silencer 20 from leaking out from the gap between them.
[0039] For example, such as Figure 4 As shown, at least a portion of the first end of the insert 23, which is away from the second surrounding portion 22, contacts the inner groove wall of the annular groove 111, and at least a portion of the second end of the insert 23 contacts the outer groove wall of the annular groove. That is, the insert 23 is designed to be slightly inclined toward the inner groove wall of the annular groove 111, and this design of the insert 23 can be represented by either a positive or a negative sign.
[0040] For example, such as Figure 5As shown, at least a portion of the structure of the first end of the insert 23 facing away from the second surrounding portion 22 contacts the outer groove wall of the annular groove 111, and at least a portion of the structure of the second end of the insert 23 contacts the inner groove wall of the annular groove 111. That is, the insert 23 is designed to be slightly inclined toward the outer groove wall of the annular groove 111, and this design of the insert 23 can be represented by either "exactly" or "negative".
[0041] By designing the insert 23 at a slightly outward or inward angle toward the inner wall of the annular groove 111, a small gap or pre-tightening tendency exists between the insert 23 and the groove wall of the annular groove 111 in its natural state. When the insert 23 of the muffler 20 is assembled with the annular groove 111 of the cylinder head 10, the insert 23 is squeezed by the groove wall of the annular groove 111, causing elastic deformation and generating a rebound force to restore its original shape, ensuring that it always fits tightly against the groove wall of the annular groove 111, forming a dynamic sealing pressure. Even if the muffler 20 is slightly displaced due to vibration, temperature, or other changes, the rebound force can adaptively compensate for the gap and maintain the sealing effect.
[0042] Furthermore, such as Figure 3 As shown, the depth of the annular groove 111 is H, satisfying: 1mm ≤ H ≤ 2.5mm. If the depth of the annular groove 111 is too large, it will weaken the strength of the journal 11 of the cylinder head 10, making the journal 11 prone to deformation and increasing the risk of interference between the journal 11 and the crankshaft; if the depth of the annular groove 111 is too small, it may result in insufficient sealing length between the muffler 20 and the journal 11, affecting the sealing effect. Therefore, the depth of the annular groove 111 of the journal 11 needs to be reasonably set to avoid the setting of the annular groove 111 affecting the performance of other structures of the pump body assembly.
[0043] Furthermore, such as Figure 3 As shown, the annular groove 111 has a first rounded corner at its end near the outer groove wall and a second rounded corner at its end near the inner groove wall. By setting the port end of the annular groove 111 to a rounded corner, the burrs on the edge of the annular groove 111 are removed, and the annular groove 111 and the muffler 20 are well assembled.
[0044] Furthermore, the radius of the first rounded corner is R1, satisfying: 0mm≤R1≤0.5mm; the radius of the second rounded corner is R2, satisfying: 0mm≤R2≤0.5mm. By reasonably setting the radius range of the first and second rounded corners, the fit between the annular groove 111 and the muffler 20 is further improved.
[0045] Further, please refer to Figure 2The housing also includes a third enclosure 24, which connects to the end of the first enclosure 21 that faces away from the second enclosure 22 and abuts against the outer wall of the extension 12. This arrangement achieves a seal between the muffler 20 and the extension 12, preventing gas leakage from the gap between the muffler 20 and the extension 12, thus affecting the performance of the compressor.
[0046] This utility model embodiment also provides a compressor, including the pump body assembly as described above. This compressor includes the pump body assembly of the above embodiments, and therefore achieves all the technical effects of the above-described pump body assembly, which will not be repeated here.
[0047] In summary, the pump assembly and compressor provided by this utility model have the following advantages:
[0048] By providing an annular groove in the journal of the cylinder head and an insert in the muffler housing, with at least a portion of the insert abutting against the inner and / or outer wall of the annular groove, a seal is formed between the insert and the annular groove. This arrangement increases the sealing area between the muffler and the journal, improves the sealing performance between the muffler and the journal, enhances the sealing reliability between the muffler and the journal, reduces gas leakage within the muffler, and improves the reliability of the compressor.
[0049] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.
Claims
1. A pump body assembly, comprising a cylinder, a cylinder head, and a muffler, wherein the cylinder head is respectively disposed at both axial ends of the cylinder; the cylinder head includes a journal and an extension extending radially outward away from the journal; the muffler includes a hollow housing, and the journal is disposed inside the housing; characterized in that, The journal is provided with an annular groove on the end face away from the extension; the housing includes a first surrounding part, a second surrounding part and an insert part connected in sequence, the first surrounding part is provided on the outer side of the side wall of the journal, the second surrounding part is provided on the outer side of the end face away from the extension of the journal, and at least a portion of the structure of the insert part abuts against the inner groove wall and / or the outer groove wall of the annular groove.
2. The pump body assembly according to claim 1, characterized in that, The journal has a central through hole, and the crankshaft of the pump body assembly is located in the central through hole; the outer diameter of the journal is D, the outer diameter of the annular groove is D1, the inner diameter of the annular groove is D2, and the inner diameter of the journal is D3, satisfying: D+D3≥D1+D2.
3. The pump body assembly according to claim 1, characterized in that, The angle between the embedded part and the axial direction of the annular groove is θ, which satisfies: -10°≤θ≤10°.
4. The pump body assembly according to claim 3, characterized in that, At least a portion of the structure of the first end of the embedded part away from the second surrounding part is in contact with the inner groove wall of the annular groove, and at least a portion of the structure of the second end of the embedded part is in contact with the outer groove wall of the annular groove.
5. The pump body assembly according to claim 3, characterized in that, At least a portion of the structure of the first end of the embedded part away from the second surrounding part is in contact with the outer groove wall of the annular groove, and at least a portion of the structure of the second end of the embedded part is in contact with the inner groove wall of the annular groove.
6. The pump body assembly according to claim 1, characterized in that, The depth of the annular groove is H, which satisfies: 1mm≤H≤2.5mm.
7. The pump body assembly according to claim 1, characterized in that, The annular groove has a first rounded corner at the end near its outer groove wall and a second rounded corner at the end near its inner groove wall.
8. The pump body assembly according to claim 7, characterized in that, The radius of the first rounded corner is R1, which satisfies: 0mm≤R1≤0.5mm; the radius of the second rounded corner is R2, which satisfies: 0mm≤R2≤0.5mm.
9. The pump body assembly according to claim 7, characterized in that, The housing further includes a third surrounding portion, which is connected to the end of the first surrounding portion away from the second surrounding portion and abuts against the outer wall of the extension portion.
10. A compressor, characterized in that, Includes the pump body assembly as described in any one of claims 1 to 9.