Oil supply assembly for compressor and compressor

Abstract

The utility model relates to an oil supply assembly for a compressor and the compressor. The oil supply assembly comprises a hollow oil pipe suitable for being connected to a rotating shaft of the compressor so as to supply lubricating oil to an oil channel in the rotating shaft through the oil pipe; the spiral component and the oil pipe are concentrically and fixedly installed on the outer wall of the oil pipe, and the spiral component is suitable for stirring the lubricating oil and pressing the lubricating oil to an oil inlet of the oil pipe. The compressor comprises the oil supply assembly. According to the oil supply assembly and the compressor, lubricating oil can be supplied to the central oil duct and the eccentric oil duct in the rotating shaft with high pressure so as to be supplied to the joint faces of all the components, the oil supply capacity under the low-speed working condition can be remarkably improved, and the lubricating effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of compressors. Specifically, it relates to an oil supply assembly for a compressor and a compressor having an oil supply assembly. Background Technology

[0002] The content in this section only provides background information related to this utility model and may not constitute prior art.

[0003] During the operation of a compressor (e.g., a scroll compressor), lubricating oil in the compressor's oil sump is delivered to the mating surfaces between the compressor's components as the compressor runs, providing the necessary lubrication, reducing wear, and ensuring the normal operation of each component. The design of the oil supply mechanism in a compressor typically includes positive displacement and centrifugal designs. In a positive displacement oil supply mechanism, lubricating oil is pumped, for example, through a rotor pump into channels within the rotating shaft and then delivered to the moving parts. Positive displacement oil supply mechanisms offer the advantage of stable oil supply. However, their structure is generally more complex, requires more sophisticated assembly processes, and are more expensive.

[0004] In contrast, centrifugal oil supply mechanisms have a relatively simple structure, eliminating the need for a rotor pump and its related components. In compressors with centrifugal oil supply mechanisms, lubricating oil in the oil sump is supplied to the central oil passage within the rotating shaft, and further supplied to the eccentric oil passage within the rotating shaft by the centrifugal force of the rotating shaft, and then transported from the rotating shaft to the mating surfaces between the components. The amount of lubricating oil supplied from the oil sump to the mating surfaces between the components via the rotating shaft depends on the rotational speed of the rotating shaft. Therefore, for centrifugal oil supply mechanisms, at low speeds, the centrifugal force generated by the rotation of the rotating shaft is relatively small, resulting in less or even insufficient lubricating oil supplied from the oil sump to the mating surfaces between the components, posing a risk of easy wear on the moving parts.

[0005] Therefore, the design of the oil supply structure of the scroll compressor needs to be improved in order to ensure sufficient oil supply under low-speed conditions with a simple structure and low cost. Utility Model Content

[0006] One object of this invention is to solve at least one of the aforementioned problems. Another object of this invention is to improve the oil supply capacity of the oil supply mechanism under low-speed conditions with a simple structure, thereby improving the lubrication effect under low-speed conditions. Yet another object of this invention is to improve the oil supply capacity under low-speed conditions in an energy-efficient manner.

[0007] One aspect of this utility model is to provide an oil supply assembly. The oil supply assembly includes: a hollow oil pipe adapted to be connected to the rotating shaft of a compressor to supply lubricating oil to an oil passage within the rotating shaft; and a spiral member, which is concentrically fixed to the outer wall of the oil pipe and adapted to agitate the lubricating oil and press it toward the oil inlet of the oil pipe.

[0008] In one embodiment, the oil supply assembly further includes an annular shroud, in which the helical member is housed and spaced apart from the inner wall of the annular shroud when the oil supply assembly is installed in place.

[0009] In one embodiment, the annular cover includes: a first annular portion; and a second annular portion, the diameter of which gradually increases from one end to the other, and the smaller diameter end of the second annular portion is connected to the end of the first annular portion, wherein the helical member is accommodated within the second annular portion when the oil supply assembly is installed in place.

[0010] In one embodiment, the tubing includes: a tubing body; and a transition section, the diameter of which gradually narrows from one end to the other, the transition section being connected to the tubing body, and the smaller diameter opening end of the transition section forming the tubing inlet.

[0011] The oil supply assembly also includes an oil fork, which comprises a first plate portion and a second plate portion connected to each other. The width of the first plate portion is greater than the width of the second plate portion, forming a stepped portion. The outlet end of the oil pipe has a mounting groove, and the stepped portion engages in the mounting groove, such that the oil fork is at least partially located inside the oil pipe.

[0012] In one embodiment, the helical member includes: an annular mounting portion adapted to be fixedly mounted to the outer wall of the oil pipe; and a helical portion disposed on the outer wall of the mounting portion, the helical portion being a plurality of helical blades arranged circumferentially around the mounting portion, or the helical portion extending helically around the mounting portion in an axial direction.

[0013] In one embodiment, the gap between the radial outer edge of the spiral portion and the inner wall of the annular cover is less than or equal to 2.5 mm.

[0014] Another aspect of this invention is to provide a compressor that includes an oil supply assembly according to this invention.

[0015] The compressor also includes a rotating shaft with oil passages formed within it. These oil passages include: a central oil passage, concentric with the rotating shaft and extending axially from a first end of the rotating shaft; and an eccentric oil passage, eccentrically positioned with respect to the rotating shaft and communicating with the central oil passage, extending from the central oil passage to a second end of the rotating shaft. The outlet end of an oil pipe is installed within the central oil passage.

[0016] The compressor also includes a bottom casing that defines an oil sump for the compressor. An annular shroud is located within the oil sump, concentrically mounted on the bottom casing, and together with the bottom casing, forms an oil storage space. The oil inlets of the spiral assembly and oil pipes are located within the oil storage space.

[0017] This invention provides an improved design for an oil supply mechanism. According to this invention, during operation of the oil supply assembly and the compressor, as the rotating shaft rotates, the spiral component of the oil supply assembly pushes the lubricating oil in the oil sump downwards, increasing the liquid pressure of the lubricating oil at the bottom of the oil sump. This facilitates the lubricating oil entering the oil pipes at higher pressure, and subsequently entering the central and eccentric oil passages within the rotating shaft, supplying the lubricating oil to the mating surfaces between various components. This significantly improves the oil supply capacity under low-speed conditions and enhances the lubrication effect. Attached Figure Description

[0018] Embodiments of the present invention will be described below by way of example only with reference to the accompanying drawings. In the drawings, the same features or parts are indicated by the same reference numerals, and the drawings are not necessarily drawn to scale.

[0019] Figure 1 A longitudinal sectional view of a compressor according to a first embodiment of the present invention is shown;

[0020] Figure 2 It shows Figure 1 A cross-sectional view of the oil supply mechanism of the compressor in the image;

[0021] Figure 3 It shows Figure 2 A front view of the oil supply component of the oil supply mechanism shown;

[0022] Figure 4 It shows Figure 3 A perspective view of the oil pipes of the oil supply assembly shown in the figure;

[0023] Figure 5 It shows Figure 3 A perspective view of the spiral component of the oil supply assembly shown;

[0024] Figure 6 It shows Figure 3 A plan view of the oil supply fork of the oil supply assembly shown;

[0025] Figure 7 It shows Figure 2 A cross-sectional view of a portion of the oil supply mechanism shown;

[0026] Figure 8 It shows Figure 2 An enlarged view of a portion of the oil supply mechanism shown;

[0027] Figure 9 It shows Figure 2A perspective view of a portion of the oil supply mechanism shown;

[0028] Figure 10 A longitudinal sectional view of a compressor for comparison is shown; and

[0029] Figure 11 A perspective view of the spiral member of the oil supply assembly according to a modified example of the first embodiment of the present invention is shown. Detailed Implementation

[0030] The following description is exemplary in nature and is not intended to limit the invention, its application, or its uses. It should be understood that in all these figures, similar reference numerals indicate the same or similar parts and features. The figures only schematically illustrate the concept and principles of embodiments of the invention and do not necessarily show the specific dimensions and scale of each embodiment. Certain parts of specific figures may be depicted in an exaggerated manner to illustrate relevant details or structures of embodiments of the invention.

[0031] In the description of the embodiments of this utility model, the directional terms related to "up," "down," "left," and "right" are used to describe the positions of the views shown in the accompanying drawings. In practical applications, the positional relationships of "up," "down," "left," and "right" used herein can be defined according to the actual situation, and these relationships can be reversed.

[0032] Figure 1 A longitudinal sectional view of compressor 1 according to a first embodiment of the present invention is shown. In the example shown, compressor 1 is a scroll compressor. However, the present invention is not limited thereto, and in other embodiments according to the present invention, compressor 1 may be other types of compressors. Figure 1 As shown, the compressor 1 includes a housing assembly 10 and a compression mechanism 20 and a rotating shaft 30 located within the housing assembly 10. In the example shown, the housing assembly 10 includes a housing 11 and a bottom shell 12 and a top shell 13 respectively connected to both ends of the housing 11. The compression mechanism 20 includes a first scroll member 21 and a second scroll member 22. The scrolls of the first scroll member 21 and the second scroll member 22 engage with each other to form a series of compression chambers. The upper end of the rotating shaft 30 is supported on an upper bearing seat 31, and the lower end of the rotating shaft 30 is supported on a lower bearing seat 32. An eccentric crank pin located at the upper end of the rotating shaft 30 is housed in the hub of the second scroll member 22, and the rotation of the rotating shaft 30 drives the second scroll member 22 to move relative to the first scroll member 21 via a drive bearing to compress the working fluid in the compression chamber. An oil sump O is formed at the bottom of the compressor 1. In the example shown, the oil sump O is defined by a portion of the housing 11 and the bottom shell 12.

[0033] Figure 2 It shows Figure 1 A magnified view of a portion of the image shows the oil supply mechanism of compressor 1. The oil supply mechanism of compressor 1 has an eccentric design. (As shown...) Figure 2 As shown, the oil supply mechanism of compressor 1 includes an oil sump O ( Figure 2 Only the bottom shell 12 defining the oil tank O and the rotating shaft 30 are shown. Oil passages are formed within the rotating shaft 30, including a central oil passage 311 and an eccentric oil passage 312. The central oil passage 311 is concentric with the rotating shaft 30, and extends from the first end of the rotating shaft (…). Figure 2 The lower end of the shaft 30 extends axially. The eccentric oil passage 312 is eccentrically disposed with respect to the rotating shaft 30 and communicates with the central oil passage 311. The eccentric oil passage 312 extends from the central oil passage 311 to the second end of the rotating shaft 30. Figure 2 (The upper end of the shaft). The oil level L in the oil sump O is higher than the lower end of the rotating shaft 30, so as to facilitate the supply of lubricating oil in the oil sump O to the rotating shaft 30 as it rotates. (See also: [link to previous section]) Figure 1 The oil level L in the oil sump O is higher than the height of the lower bearing housing 32.

[0034] The oil supply mechanism of compressor 1 also includes an oil supply assembly M connected between the rotating shaft 30 and the oil sump O. During the operation of compressor 1, as the rotating shaft 30 rotates, the lubricating oil in the oil sump O is supplied to the oil passages within the rotating shaft 30 via the oil supply assembly M. Specifically, the lubricating oil in the oil sump O is supplied to the central oil passage 311 via the oil supply assembly M, and subsequently to the eccentric oil passage 312, such as... Figure 2 As indicated by the arrow, it is then supplied from the second end of the rotating shaft 30 to the hub of the second scroll member 22, and further to the mating surface between the moving parts, as shown in the image. Figure 1 As indicated by the arrows in the diagram. The central oil passage 311 forms the primary oil pump of the compressor 1, and the eccentric oil passage 312 forms the secondary oil pump of the compressor 1.

[0035] Figure 3 A front view of the oil supply assembly M is shown. (As shown) Figure 3 As shown, the oil supply assembly M includes a hollow oil pipe 51 and a spiral member 52 mounted on the outer wall of the oil pipe 51. The oil pipe 51 is adapted to be connected to the rotating shaft 30 of the compressor 1 to supply lubricating oil to the oil passage within the rotating shaft 30 via the oil pipe 51. The spiral member 52 is concentrically fixed to the outer wall of the oil pipe 51 and is adapted to agitate the lubricating oil and press the agitated lubricating oil toward the oil inlet of the oil pipe 51.

[0036] Figure 4 A perspective view of oil pipe 51 is shown. (As shown) Figure 4 As shown, the oil pipe 51 includes a pipe body 511 and a transition section 512. The transition section 512 is connected to the inlet end of the pipe body 511. Figure 4 (The lower end of the middle). Figure 4 In the example shown, the tube body 511 and the transition portion 512 are integrally formed. However, the present invention is not limited thereto. In other examples according to the present invention, the tube body 511 and the transition portion 512 can be formed separately and then connected to each other. The diameter of the transition portion 512 tapers from one end to the other, and the smaller diameter opening end of the transition portion 512 forms the oil inlet 513 of the oil pipe 51. The diameter of the oil inlet 513 is smaller than the diameter of the tube body 511, so that lubricating oil can enter the oil pipe 51 at a higher liquid pressure and be further supplied to the central oil passage 311 and the eccentric oil passage 312 within the rotating shaft 30. In one example, in the direction perpendicular to the axis of the oil pipe 51, the area of ​​the oil inlet 513 can be 20% to 40% of the area of ​​the tube body 511, thereby enabling the oil supply assembly M to significantly increase the liquid pressure of the oil inlet and thus increase the oil supply volume under low-speed conditions, without excessively restricting the oil supply assembly M under high-speed conditions. The outlet end 514 of the pipe body 51 of the oil pipe 51 is provided with a pair of mounting grooves 515 that are spaced apart from each other in the circumferential direction and are opposite to each other in the radial direction. Figure 4 Only one mounting slot 515 is shown in the image.

[0037] Figure 5 A perspective view of the helical component 52 is shown. (As shown) Figure 5 As shown, the helical component 52 includes an annular mounting portion 521 and a helical portion 522. The mounting portion 521 is adapted to be fixedly mounted to the outer wall of the oil pipe 51. The helical portion 522 consists of a plurality of helical blades disposed on the outer wall of the mounting portion 521. (See also: [link to previous section]) Figure 3 The spiral component 52 is concentrically fixed to the outer wall of the oil pipe 51 via the mounting part 521, specifically, it is fixedly installed to the outer wall of the pipe body 511 of the oil pipe 51. The mounting part 521 of the spiral component 52 is installed to the outer wall of the pipe body 511 by interference fit, on the side near the oil inlet 513, such as... Figure 3 As shown. Alternatively, the vortex member 52 can also be fixed to the outer wall of the tube body 511 by other suitable means, such as by welding.

[0038] The oil supply assembly M also includes an oil fork 40. Figure 6 A front view of the oil fork 40 is shown. (As shown) Figure 6As shown, the hydraulic fork 40 includes a first plate portion 41 and a second plate portion 42 connected to each other. The width of the first plate portion 41 is greater than the width of the second plate portion 42, thus forming stepped portions 411 on both sides. The hydraulic fork 40 is mounted to an oil pipe 51, with the stepped portions 411 engaging in a mounting groove 515 of the oil pipe 51, such that the hydraulic fork 40 is at least partially located within the oil pipe 51. Specifically, in the example shown in the figure, a portion of the first plate portion 41 and the second plate portion 42 are located within the lumen of the oil pipe 51. In the example shown in the figure, the first plate portion 41 and the second plate portion 42 are integrally formed into a flat shape. However, the present invention is not limited thereto. In other examples according to the present invention, the first plate portion 41 and the second plate portion 42 may be formed separately and then connected to each other, and / or the first plate portion 41 and the second plate portion 42 may be bent relative to each other.

[0039] The oil supply assembly M is installed on the rotating shaft 30. Figure 7 The installation between the oil supply assembly M and the rotating shaft 30 is shown, with only the oil pipe 51 of the oil supply assembly M shown. Figure 7 As shown, the outlet end 514 of the oil pipe 51 is installed inside the central oil passage 311 of the rotating shaft 30, and the oil pipe 51 is concentric with the rotating shaft 30 and the central oil passage 311. The outlet end 514 of the oil pipe 51 is interference-fitted to the inner wall of the central oil passage 311, so that the oil pipe 51 rotates integrally with the rotating shaft 30. Although in Figure 7 Not shown, but as described above, the hydraulic fork 40 is installed at the outlet end 514 of the oil pipe 51. The first plate portion 41 of the hydraulic fork 40 engages in the mounting groove 515 at the outlet end 514 of the oil pipe 51, and the second plate portion 42 of the hydraulic fork 40 is located inside the cavity of the oil pipe 51. The width of the first plate portion 41 of the hydraulic fork 40 is equal to or slightly smaller than the outer diameter of the oil pipe 51, and the first plate portion 41 of the hydraulic fork 40 has a slight interference fit with the inner wall of the central oil passage 311. Therefore, during the rotation of the rotating shaft 30, the oil pipe 51, the helical member 52, and the hydraulic fork 40 all rotate as a whole with the rotation of the rotating shaft 30.

[0040] In the example shown in the figure, the first plate portion 41 and the second plate portion 42 are centered on each other, and both sides have stepped portions 411. However, the present invention is not limited to this, as long as the oil fork 40 can be stably installed on the oil pipe 51 and in the central oil passage 311 of the rotating shaft 30. For example, in other examples according to the present invention, a stepped portion may be formed only on one side between the first plate portion 41 and the second plate portion 42, and the stepped portion engages with the mounting groove 515 of the oil pipe 51 to stably install it on the oil pipe 51.

[0041] Figure 8 Show Figure 2 An enlarged view of a portion of the oil supply mechanism shown herein illustrates the oil supply component M. (As shown...) Figure 8As shown, the oil supply assembly M also includes an annular cover 53. When installed in place, the annular cover 53 is located within the oil sump O and is concentrically mounted on the bottom housing 12 of the compressor 1. One end of the annular cover 53 forms an oil storage space V with the bottom housing 12, which is sealed at the lower end and open at the upper end. When installed in place, the oil inlet 513 of the oil pipe 51 and the spiral member 52 are both located within the oil storage space V formed by the annular cover 53 and the bottom housing 12. The spiral member 52 is housed within the annular cover 53 and spaced apart from the inner wall of the annular cover 53. The gap d between the radial outer edge of the spiral portion 522 and the inner wall of the annular cover 53 is small, for example, the gap d is less than or equal to 2.5 mm, so that for an annular cover with a given radial dimension, the spiral portion 522 can agitate the lubricating oil to a greater extent and concentrate the agitated lubricating oil within the annular cover to press against the oil inlet of the oil pipe 51.

[0042] In the example shown in the figure, the annular cover 53 includes a first annular portion 531 and a second annular portion 532. The second annular portion 532 is connected to the first annular portion 531, and the diameter of the second annular portion 531 gradually increases from the connection point with the first annular portion 531 toward the end (the opening end of the oil storage space V), so that the oil storage space V is formed in a funnel shape to facilitate the entry of lubricating oil from the oil sump O into the oil storage space V and its concentration around the oil inlet 513 of the spiral member 52 and the oil pipe 51, and then into the oil pipe 51. Under the agitation of the oil fork 40, it is supplied upward to the central oil passage 311 and the eccentric oil passage 312 in the rotating shaft 30. In the example shown in the figure, the outer contour of the second annular portion 532 is truncated cone-shaped, and the first annular portion 531 and the second annular portion 532 are integrally formed. However, the present invention is not limited to this. In other examples according to the present invention, the outer contour of the second annular portion 532 may be other shapes, and / or the first annular portion 531 and the second annular portion 532 may be formed separately and then connected to each other.

[0043] Figure 9 A perspective view of the annular cover 53 and the base shell 12 is shown. In the example shown, the annular cover 53 and the base shell 12 are integrally formed. However, the present invention is not limited thereto. In other examples according to the present invention, the annular cover 53 may be formed separately and fixedly mounted to the base shell 12, for example, by welding to the base shell 12.

[0044] Figure 10 A partial longitudinal sectional view of a compressor 1A as a comparative example is shown. The structure of compressor 1A is substantially the same as that of compressor 1 according to the present invention, the difference being in the design of the oil supply mechanism. In the accompanying drawings, the same parts are indicated by the same reference numerals and will not be described again.

[0045] The oil supply mechanism of the compressor 1A in the comparative example includes an oil sump O defined by a portion of the housing 11 of the housing assembly 10A and a bottom shell 12A, a rotating shaft 30 with a central oil passage 311 and an eccentric oil passage 312 formed therein, and an oil fork 40A disposed within the rotating shaft 30. The difference between the oil supply mechanism of compressor 1A and the oil supply mechanism of compressor 1 according to the present invention is that it does not have the oil supply component M according to the present invention.

[0046] In the compressor 1A of the comparative example, as the rotating shaft 30 rotates, lubricating oil in the oil sump O is supplied to the central oil passage 311, and then, under the action of the centrifugal force generated by the rotation of the rotating shaft 30, it is supplied to the eccentric oil passage 312, and then flows out from the end of the rotating shaft 30 to supply the mating surfaces between the components. The amount of lubricating oil supplied from the oil sump O to the mating surfaces of the components via the oil supply mechanism depends on the rotational speed of the rotating shaft 30. However, under low-speed operating conditions, the centrifugal force generated by the rotation of the rotating shaft 30 is small, so that the lubricating oil in the oil sump O cannot be sufficiently supplied to the central oil passage 311 in the rotating shaft 30 and flow out from the upper end of the rotating shaft 30 via the eccentric oil passage to supply the mating surfaces between the components. Therefore, it is easy to cause insufficient lubrication at the mating surfaces between the components of the compressor 1A under low-speed operating conditions, resulting in wear of components (e.g., the first scroll member 21, the second scroll member 22, and the drive bearing and thrust plate for the second scroll member 22, etc.).

[0047] In contrast, in the compressor 1 according to this invention, the oil supply mechanism includes, in addition to an oil sump O and a rotating shaft 30 with a central oil passage 311 and an eccentric oil passage 312 formed inside, an oil supply assembly M connecting the rotating shaft 30 and the oil sump O. During the rotation of the rotating shaft 30, the oil pipe 51, the spiral member 52, and the oil fork 40 of the oil supply assembly M all rotate together with the rotating shaft 30. The spiral member 52 agitates the lubricating oil in the oil sump O and generates downward pressure on the lubricating oil below it, thereby pressing the lubricating oil towards the oil inlet 513 of the oil pipe 51. This increases the liquid pressure of the lubricating oil at the bottom of the oil sump O, thus facilitating the entry of the lubricating oil into the oil pipe 51 at a higher pressure. Furthermore, lubricating oil can only enter oil pipe 51 through the smaller inlet 513, further increasing the liquid pressure of the lubricating oil entering oil pipe 51. The increased pressure lubricating oil is supplied to the central oil passage 311 of the rotating shaft 30 (equivalent to a primary oil pump), and further supplied to the eccentric oil passage 312 (equivalent to a secondary oil pump) by the actuation of the oil fork 40, and flows out from the end of the rotating shaft 30 to supply the mating surfaces between the components. Therefore, the oil supply assembly M can increase the liquid pressure of the lubricating oil entering the central oil passage 311 of the rotating shaft 30, so that even under low-speed conditions, lubricating oil can be supplied from the central oil passage 311 to the eccentric oil passage 312 and flow out from the end of the rotating shaft 30 to supply the mating surfaces between the components, thereby improving the oil supply capacity and lubrication effect under low-speed conditions, and solving the problem of insufficient lubrication under low-speed conditions existing in the compressor 1A of the comparative example.

[0048] Advantageously, in the compressor 1 according to the present invention, by providing an annular cover 53 surrounding the oil inlet 513 of the spiral member 52 and the oil pipe 51 in the oil supply assembly M, the annular cover 53 and the bottom shell 12 form an oil storage space V that is sealed at the lower end and open at the upper end, so that the oil inlet of the spiral member 52 and the oil pipe 51 are both located in the oil storage space V. On the one hand, it is advantageous to concentrate the lubricating oil with a large liquid pressure, which is agitated by the spiral member 52, around the oil inlet 513 of the oil pipe 51, which further facilitates the supply of lubricating oil with a large liquid pressure to the oil pipe 51. On the other hand, the spiral member 52 only needs to agitate the lubricating oil in the oil storage space V, without agitating the lubricating oil in the entire oil sump O, thus also having better energy efficiency.

[0049] Figure 11 A perspective view of the helical member 52A of an oil supply assembly according to a modified example of the first embodiment of the present invention is shown. The oil supply assembly according to this modified example has a substantially the same design as the oil supply assembly M according to the first embodiment, the difference being only in the design of the helical member 52A, and more specifically, only in the design of the helical portion 522A of the helical member 52A.

[0050] like Figure 11 As shown, the spiral member 52A includes an annular mounting portion 521A and a spiral portion 522A disposed on the outer wall of the mounting portion 521A. The mounting portion 521A is adapted to be interference-fitted onto the oil pipe of the oil supply assembly. The spiral portion 522A extends spirally in the axial direction around the mounting portion 521A.

[0051] The oil supply assembly of this modified example according to the first embodiment of the present invention can achieve the above-mentioned beneficial technical effects similar to those of the oil supply assembly M of the first embodiment of the present invention.

[0052] In the embodiments shown above, the helical member of the oil supply assembly M is housed within an annular cover 53, which is concentrically disposed on the bottom shell 12, and the helical portion of the helical member forms a small gap with the inner wall of the annular cover. However, the present invention is not limited thereto. In other examples according to the present invention, the annular cover 53 may be provided by other parts of the compressor's oil sump, without the need for a separate annular cover. For example, in a modified example, the helical portion of the helical member of the oil supply assembly is formed to form a small gap with the peripheral wall of the bottom shell 12 or the peripheral wall of the housing 11 forming the oil sump, such that the peripheral wall of the bottom shell 12 or the peripheral wall of the housing 11 constitutes the annular cover.

[0053] The preferred embodiments of the oil supply assembly, oil supply mechanism, and compressor according to this utility model have been described above. Through the above design of this utility model, the oil supply capacity and lubrication effect under low-speed operating conditions can be significantly improved.

[0054] Exemplary embodiments of the present invention have been described in detail herein; however, it should be understood that the present invention is not limited to the specific embodiments described and shown above. Various modifications and variations can be made to the present invention by those skilled in the art without departing from its spirit and scope. All such modifications and variations fall within the scope of the present invention. Moreover, all components described herein can be replaced by other technically equivalent components.

Claims

1. An oil supply assembly for a compressor, characterized by, The oil supply assembly includes: A hollow oil pipe, the oil pipe being adapted to connect to the rotating shaft of the compressor to supply lubricating oil via the oil pipe to oil passages within the rotating shaft; and A spiral component is concentrically fixed to the outer wall of the oil pipe, and the spiral component is adapted to agitate the lubricating oil and press the lubricating oil toward the oil inlet of the oil pipe.

2. The oil supply assembly according to claim 1, characterized by The oil supply assembly also includes an annular cover, in which the spiral member is housed when the oil supply assembly is installed and spaced apart from the inner wall of the annular cover.

3. The oil supply assembly according to claim 2, characterized by The annular cover includes: The first ring section; and The second annular portion has a diameter that gradually increases from one end to the other, and the smaller diameter end of the second annular portion is connected to the end of the first annular portion. When the oil supply assembly is installed in place, the spiral member is housed within the second annular portion.

4. The oil supply assembly of claim 1, wherein The oil pipe includes: Pipe body; and A transition section, the diameter of which gradually narrows from one end to the other, is connected to the pipe body, and the smaller diameter opening end of the transition section forms the oil inlet of the oil pipe.

5. The oil supply assembly of claim 1, wherein The oil supply assembly further includes an oil fork, the oil fork comprising a first plate portion and a second plate portion connected to each other, the width of the first plate portion being greater than the width of the second plate portion to form a stepped portion; and The outlet end of the oil pipe is provided with a mounting groove, and the stepped portion engages in the mounting groove, so that the oil fork is at least partially located inside the oil pipe.

6. The oil supply assembly according to claim 2 or 3, characterized by The helical component includes: An annular mounting portion, said mounting portion being adapted to be fixedly mounted to the outer wall of the oil pipe; and The spiral portion is disposed on the outer wall of the mounting portion. The spiral portion is a plurality of spiral blades arranged circumferentially along the mounting portion, or the spiral portion extends spirally around the mounting portion in the axial direction.

7. The oil supply assembly according to claim 6, characterized by The gap between the radial outer edge of the spiral section and the inner wall of the annular cover is less than or equal to 2.5 mm.

8. A compressor characterized by Includes the oil supply assembly according to any one of claims 1-7.

9. The compressor of claim 8, wherein, The compressor further includes a rotating shaft, within which an oil passage is formed, the oil passage comprising: A central oil passage, concentric with the rotating shaft, extending axially from a first end of the rotating shaft; and An eccentric oil passage is provided, which is eccentrically disposed from the rotating shaft and communicates with the central oil passage. The eccentric oil passage extends from the central oil passage to a second end of the rotating shaft. The outlet end of the oil pipe is installed inside the central oil passage.

10. The compressor according to claim 8 or claim 9, characterized in that, The compressor also includes a bottom housing defining an oil sump for the compressor; and The annular cover is located inside the oil tank, concentrically disposed on the bottom shell, and forms an oil storage space with the bottom shell. The spiral component and the oil inlet of the oil pipe are located within the oil storage space.

Images