Crankshaft oil pumping structure and compressor

Abstract

The crankshaft oil pumping structure and the compressor are suitable for the compressor, the compressor comprises a crankshaft, the center of the crankshaft is provided with a center oil duct penetrating through the tail end of the crankshaft, the crankshaft oil pumping structure is installed at the tail end of the center oil duct, and the crankshaft oil pumping structure comprises a top, a connecting part and a bottom which are sequentially connected; the top part and the connecting part are connected with each other, the oil suction hole penetrates through the top part and the connecting part, one end of the top part is connected with the central oil duct, the bottom part comprises a plurality of blades provided with bulges, gaps are reserved between the bulges and the adjacent blades, and the gaps are communicated with the oil suction hole. According to the technical scheme, the manufacturing and management cost can be effectively reduced.

Description

Technical Field

[0001] The invention relates to the field of compressor oil pumping, in particular to a crankshaft oil pumping structure and a compressor. Background Art

[0002] The rotor compressor is a positive displacement rotary compressor. The change of the cylinder working volume is achieved by the rolling of a cylindrical rotor with an eccentric device in the cylinder. This type of compressor is widely used in household appliances. It has the advantages of simple structure, small size, light weight, few parts, high reliability, low vibration and stable operation.

[0003] At present, most rotary compressors use the bottom oil supply mode, that is, the oil at the bottom of the compressor pump body is sucked up through the crankshaft for use. The oil pump structure is usually a dust collecting ring and a rotor matching structure and an oil suction pipe and a rotor matching structure. The rotor is a necessary component in both structures.

[0004] However, there are certain coordination requirements between the vanes and the oil outlet holes in various parts of the pump body to achieve the optimal oil supply effect. An unreasonable angle between the vanes and the oil outlet holes will cause insufficient oil supply to the local part of the pump body, resulting in abnormal wear and accelerating the failure of the compressor under harsh working conditions.

[0005] Therefore, during the compressor manufacturing process, the insertion of the vanes also needs to be standardized, which invisibly increases the management cost. Summary of the invention

[0006] In view of the problems in the prior art, an object of the present invention is to provide a crankshaft oil pump structure and a compressor that can reduce manufacturing and management costs.

[0007] According to one aspect of the present invention, there is provided a crankshaft oil pumping structure suitable for a compressor, the compressor comprising a crankshaft: a central oil passage penetrating the end of the crankshaft is provided at the center of the crankshaft, the crankshaft oil pumping structure is installed at the end of the central oil passage, the crankshaft oil pumping structure comprises a top, a connecting part and a bottom connected in sequence, and an oil suction hole penetrating the top and the connecting part, one end of the top is connected to the central oil passage, the bottom comprises a plurality of blades with protrusions, a gap is left between the protrusions and adjacent blades, and the gap is communicated with the oil suction hole.

[0008] Preferably, the plurality of protrusions converge radially toward the rotation center of the crankshaft oil pump structure. Preferably, the angle θ between the line connecting the highest point of the protrusion and the starting point of the protrusion on the blade and the plane where the bottom is located satisfies 30≤θ≤60°.

[0009] Preferably, the opening direction of the notch is consistent with the rotation direction of the crankshaft pump oil structure.

[0010] Preferably, the protrusion is arc-shaped.

[0011] Preferably, the number of the blades is 3 to 5.

[0012] Preferably, a plurality of the protrusions are evenly distributed on the bottom.

[0013] Preferably, the top includes a plurality of claws, and the plurality of claws are connected to the central oil passage.

[0014] Preferably, the connecting portion is circular.

[0015] According to another aspect of the present invention, there is provided a compressor including the crankshaft oil pumping structure as described above.

[0016] The oil pumping passage of the crankshaft oil pumping structure and the compressor of the present invention is filled with oil, no sliding vane structure is required, and there is no need to design and control the oil outlet angle, which can effectively reduce the manufacturing and management costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present invention will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0018] Figure 1 is a schematic installation structure diagram of an embodiment of the present invention;

[0019] Figure 2 is a schematic structure diagram of an embodiment of the present invention;

[0020] Figure 3 is a schematic cross-sectional structure diagram of an embodiment of the present invention.

[0021] REFERENCE NUMERALS

[0022] 1 crankshaft

[0023] 2 central oil passage

[0024] 3 crankshaft oil pumping structure

[0025] 4 top

[0026] 5 connecting portion

[0027] 6 blade

[0028] 7 protrusion

[0029] 8 notch DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their repetitive description will be omitted.

[0031] As Figure 1 shown, in an embodiment of the present invention, a crankshaft oil pumping structure and a compressor including the same are provided.

[0032] The compressor is preferably a refrigeration compressor, and more preferably a rolling piston compressor, and is applicable to refrigeration fields such as air conditioners and refrigerators.

[0033] The compressor includes a crankshaft 1. A central oil passage 2 penetrating the end of the crankshaft 1 is provided at the center of the crankshaft 1.

[0034] And in combination with as Figure 2 shown, a crankshaft oil pumping structure 3 is installed at the end of the central oil passage 2. The crankshaft oil pumping structure 3 includes a top 4, a connecting portion 5 and a bottom connected in sequence, and an oil suction hole penetrating the top 4 and the connecting portion 5.

[0035] One end of the top 4 is connected to the central oil passage 2. The bottom includes a plurality of vanes 6 provided with protrusions 7. A gap 8 is left between the protrusion 7 and the adjacent vane 6, and the gap 8 communicates with the oil suction hole.

[0036] Specifically, the bottom is circular, and the circular bottom is divided into a plurality of vanes 6, and each vane 6 is provided with the protrusion 7 near the center of the circle.

[0037] In the existing oil pumping technology, a rotating vane is provided in the central oil passage. When the crankshaft rotates, the rotating vane will pump the bottom oil up along the oil suction hole. However, in the embodiment of the present invention, there is no need to provide a rotating vane. The protrusion 7 provided with the vane 6 directly rotates to form a centrifugal force, so that the lubricating oil enters through the gap 8 and enters the central oil passage under the action of the centrifugal force, and the oil pumping effect can be completed. This application does not need to install a rotating vane, nor does it need to design and control the installation and oil outlet angle of the rotating vane, which can effectively reduce the manufacturing and management costs.

[0038] As Figure 1 and Figure 2 shown, in an embodiment of the present invention, preferably, a plurality of protrusions 7 converge radially towards the rotation center of the crankshaft oil pumping structure 3. The angle θ between the connection line of the highest point of the protrusion 7 and the starting point of the protrusion 7 on the vane 6 and the plane where the bottom is located satisfies 30 ≤ θ ≤ 60°.

[0039] Another as Figure 2As shown in the figure, in an embodiment of the present invention, it is preferred that the opening direction of the notch 8 is consistent with the rotation direction of the crankshaft oil pumping structure 3, which can conveniently scoop up the lubricating oil in the front during rotation and bring it into the central oil passage 2, thereby improving efficiency.

[0040] In addition, as Figure 2 shown in the figure, in an embodiment of the present invention, it is preferred that the protrusion 7 is arc-shaped. Both sides of the protrusion are connected to the blade 6. In this embodiment, the arc shape can be selected as a 1 / 4 spherical shape, and the center of the circle is located on the blade 6.

[0041] The number of blades 6 is 3 to 5. Considering that resonance and other problems may occur with even-numbered blades, 3 or 5 are preferred.

[0042] Further preferably, a number of protrusions 7 are evenly distributed at the bottom. Specifically, the bottom is evenly divided into a number of blades 6, and the number of blades 6 are distributed around the center of the bottom. Specifically, each blade 6 is triangular, and the protrusion 7 is formed at the position of the blade 6 close to the center of the circle.

[0043] As Figure 3 shown in the figure, in an embodiment of the present invention, it is preferred that the top 4 includes a number of claws. And in combination with as Figure 1 shown in the figure, a number of claws are connected to the central oil passage 2. The ends of the number of claws close to the central oil passage 2 enclose a circle, and the outer diameter is smaller than the inner diameter of the central oil passage 2, which is convenient for the number of claws to be inserted into the central oil passage 2. Further, the outer diameter of the circle formed by the tails of the number of claws is larger than the inner diameter of the central oil passage 2, so that an interference fit is formed after the number of claws are inserted into the central oil passage 2, and the crankshaft oil pumping structure is fixed in the central oil passage 2.

[0044] Please continue to refer to Figure 2 、 3 , the connecting portion 5 is circular, and the size of the connecting portion 5 is larger than the inner diameter of the central oil passage 2. During installation, it can be abutted against the outside of the central oil passage 2 to prevent the connecting portion 5 from entering the central oil passage 2. The upper end of the connecting portion 5 is connected to the claw, and the lower end is connected to the bottom. A cylindrical cavity 9 is formed between the claw, the connecting portion and the bottom.

[0045] Since the claws at the top 4 are fixedly connected to the crankshaft 1, when the crankshaft 1 rotates, it will drive the bottom blade 6 to rotate, and finally the protrusion 7 on the blade 6 rotates. The rotating protrusion 7 will drive the contacted bottom lubricating oil to rotate. The lubricating oil enters the central oil passage 2 through the rotating action, generating a water pumping effect similar to a water pump. The lubricating oil fills the oil pumping through holes to supply oil to all parts of the pump body sufficiently.

[0046] In summary, the technical solution of the embodiment of the present invention enables the dust collection ring to have the ability to supply oil upward. When the pump body rotates, the lubricating oil will enter the oil pumping hole along the arc-shaped inclined surface through the notch. There is no longer a need for a rotating vane, and the oil pumping passage is filled with oil, eliminating the need to design and control the oil outlet angle, reducing the manufacturing and management costs.

[0047] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A crankshaft oil pumping structure, applicable to a compressor, the compressor including a crankshaft, characterized in that: A central oil passage penetrating the end of the crankshaft is provided at the center of the crankshaft. The crankshaft oil pumping structure is installed at the end of the central oil passage. The crankshaft oil pumping structure includes a top, a connecting portion, and a bottom connected in sequence, and an oil suction hole penetrating the top and the connecting portion. One end of the top is connected to the central oil passage. The bottom includes a plurality of blades provided with protrusions. A gap is left between the protrusions and adjacent blades, and the gap is communicated with the oil suction hole.

2. The crankshaft oil pumping structure according to claim 1, wherein: A plurality of the protrusions converge radially toward the rotation center of the crankshaft oil pumping structure.

3. The crankshaft oil pumping structure according to claim 2, characterized in that: The included angle θ between the line connecting the highest point of the protrusion and the starting point of the protrusion on the blade and the plane where the bottom is located satisfies 30 ≤ θ ≤ 60°.

4. The crankshaft oil pumping structure according to claim 1, wherein: The opening direction of the gap is consistent with the rotation direction of the crankshaft oil pumping structure.

5. The crankshaft oil pumping structure according to claim 1, wherein: The protrusion is arc-shaped.

6. The crankshaft oil pumping structure according to claim 1, wherein: The number of the blades is 3 to 5.

7. The crankshaft oil pumping structure according to claim 1, wherein: A plurality of the protrusions are evenly distributed on the bottom.

8. The crankshaft oil pumping structure according to claim 1, characterized in that: The top includes a plurality of claws, and a plurality of the claws are connected to the central oil passage.

9. The crankshaft oil pumping structure according to claim 8, characterized in that: The connecting portion is circular.

10. A compressor, characterized in that: It includes the crankshaft oil pumping structure according to any one of claims 1 to 9.

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