Crankshaft and pump assembly

Abstract

The utility model relates to the technical field of compressors, and discloses a crankshaft which comprises a crankshaft body, a circulation channel is formed in the crankshaft body in the axial direction, a first through hole is formed in one end of the crankshaft body, and a second through hole is formed in the side wall of the crankshaft body. The first through hole and the second through hole are both communicated with the circulation channel; an oil groove is formed in the inner wall of the circulation channel, and one end of the oil groove communicates with the first through hole. The pump assembly has the following technical effects that the circulation channel is arranged to play a conduction role, so that lubricating oil is more smoothly dispersed among all parts of the pump assembly in the operation process of the pump assembly, and a lubricating role is quickly played; the oil groove is formed in the circulation channel, lubricating oil can be guided and promoted to flow to the second through hole along the first through hole, the lubricating effect is further improved, and therefore the operation performance of the pump assembly is improved. The utility model also discloses a pumping assembly.

Description

TECHNICAL FIELD

[0001] The utility model belongs to compressor technical field, concretely relates to a crankshaft and pump assembly. BACKGROUND

[0002] The pump assembly of the compressor will produce high friction between components during high-speed operation, and therefore, refrigerant oil is needed to form an oil film between the components to play a lubricating role, so as to ensure the normal operation of the compressor pump assembly. In the actual operation process, the lower end of the rotating shaft of the pump assembly is usually immersed in refrigerant oil. During the high-speed operation of the pump assembly, the high-speed rotation of the rotating shaft will stir the refrigerant oil to transfer to the middle end and the upper end of the rotating shaft, so that the refrigerant oil is distributed between the components of the pump assembly and forms an oil film to achieve the lubricating effect.

[0003] In the prior art, grooves are formed on the outer circumferential surface of the rotating shaft or the inner circumferential surface of the cylinder body to provide flow channels for the refrigerant oil, so that the refrigerant oil can reach between the components from bottom to top. However, due to the small gap between the rotating shaft and the piston or the cylinder body, even if grooves are formed on the outer circumferential surface of the rotating shaft or the inner circumferential surface of the cylinder body, the refrigerant oil cannot quickly reach between the components of the pump assembly. During the operation of the pump assembly, the refrigerant oil cannot quickly play a lubricating role, which is not conducive to improving the operation performance of the pump assembly. SUMMARY

[0004] To solve the problems of the prior art, the utility model provides a crankshaft, which can guide the lubricating oil to flow between the components of the pump assembly by forming a flow channel, so that the lubricating oil can flow smoothly and quickly play a lubricating role. By forming an oil groove in the flow channel, the flow of the lubricating oil from the first through hole to the second through hole is guided and promoted, and the lubricating effect is further improved, so that the operation performance of the pump assembly is improved. The utility model also provides a pump assembly.

[0005] The technical effects achieved by the utility model are realized by the following technical aspects:

[0006] In a first aspect, the utility model provides a crankshaft, which comprises a crankshaft body, a flow channel is formed in the crankshaft body along the axial direction, a first through hole is formed in one end of the crankshaft body, a second through hole is formed in the side wall of the crankshaft body, and the first through hole and the second through hole are in communication with the flow channel.

[0007] An oil groove is formed in the inner wall of the flow channel, and one end of the oil groove is in communication with the first through hole.

[0008] As a further description of the utility model, the cross-sectional area of the oil groove is 0.2-4mm 2 .

[0009] As a further description of the utility model technical scheme, the eccentric structure is arranged on the crankshaft body, the eccentric structure comprises a first end portion and a second end portion, the first end portion is located between the first through hole and the second end portion, and the second through hole is arranged between the first end portion and the second end portion.

[0010] As a further description of the utility model technical scheme, the oil channel is spiral.

[0011] As a further description of the utility model technical scheme, the oil channel is linear.

[0012] As a further description of the utility model technical scheme, the oil channel comprises a third end portion and a fourth end portion, the third end portion is communicated with the first through hole, and the fourth end portion is located at the position of the second end portion.

[0013] As a further description of the utility model technical scheme, the oil channel is curved, and the number of the oil channels is multiple, and the multiple oil channels are arranged along the circumference of the crankshaft body.

[0014] As a further description of the utility model technical scheme, the oil channel comprises a third end portion and a fourth end portion, the third end portion is communicated with the first through hole, and the fourth end portion is located between the first through hole and the second through hole.

[0015] As a further description of the utility model technical scheme, the length of the oil channel is 3-10mm.

[0016] Secondly, the utility model provides a kind of pumping assembly, including piston, cylinder body, first support, second support and the crankshaft, the first support, the piston and the second support are sequentially set on the crankshaft from bottom to top, and the cylinder body is set on the outside of the piston.

[0017] In conclusion, the utility model has at least the following advantages:

[0018] The crankshaft provided by the utility model can better guide the flow by setting flow passage in the inside of crankshaft body, so that lubricating oil is more smoothly distributed between each component of pumping assembly during the operation of pumping assembly, lubricating effect is quickly exerted, and the operation performance of pumping assembly is improved.

[0019] The pump assembly provided by the utility model has the crankshaft, can make the lubricating oil reach among various components and form an oil film during high-speed operation of the pump assembly, quickly plays a lubricating role, and thus improves the operation performance of the pump assembly, and further improves the overall performance of the compressor. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a cross-section structure schematic view of the crankshaft of the utility model embodiment 1.

[0021] Figure 2 It is a cross-section structure schematic view of the crankshaft of the utility model embodiment 2.

[0022] Figure 3 It is a cross-section structure schematic view of the crankshaft of the utility model embodiment 3.

[0023] Figure 4 It is a cross-section structure schematic view of the crankshaft of the utility model embodiment 4.

[0024] Figure 5 It is a cross-section structure schematic view of the pump assembly of the utility model embodiment 5.

[0025] Markings in the drawing:

[0026] 1, crankshaft main body;11, flow-through channel;12, first through hole;13, second through hole;14, oil groove;141, third end;142, fourth end;

[0027] 2, eccentric structure;21, first end;22, second end;

[0028] 100, piston;200, cylinder body;300, first support;400, second support;500, crankshaft. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the utility model embodiments clearer, the technical scheme in the utility model embodiments will be described clearly and completely in combination with the drawings in the utility model embodiments. The described embodiments are part of the embodiments of the utility model, rather than all the embodiments.

[0030] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0031] Embodiment 1

[0032] Reference Figure 1 The crankshaft provided by the embodiment comprises a crankshaft body 1, an internal flow channel 11 is axially arranged in the crankshaft body 1, a first through hole 12 is arranged at the lower end of the crankshaft body 1, a second through hole 13 is arranged on the side wall of the crankshaft body 1, and the first through hole 12 and the second through hole 13 are both communicated with the internal flow channel 11. During the high-speed operation of the pumping assembly, the lubricating oil at the bottom of the pumping assembly will be distributed between the various components of the pumping assembly through the first through hole 12, the internal flow channel 11 and the second through hole 13, and an oil film is formed, thereby achieving the lubricating effect.

[0033] By arranging the internal flow channel at the axial position of the crankshaft body 1, a more unobstructed flow channel is provided for the lubricating oil, which plays a better guiding role, so that the lubricating oil can more quickly reach between the various components of the pumping assembly during the operation of the pumping assembly, and the lubricating effect is quickly achieved, thereby being beneficial to the improvement of the operation performance of the pumping assembly.

[0034] Further, an oil groove 14 is formed on the inner wall of the internal flow channel 11, one end of the oil groove 14 is communicated with the first through hole 12, the other end of the oil groove 14 extends towards the direction of the second through hole 13, and can terminate before the second through hole 13 or after the second through hole 13. The oil groove 14 mainly plays a further guiding and promoting role. During the high-speed rotation of the crankshaft, the lubricating oil at the bottom of the crankshaft will be stirred to flow upwards, and the presence of the oil groove 14 can make the lubricating oil transfer upwards along the extension direction of the oil groove 14, accelerate the distribution of the lubricating oil, further enhance the lubricating effect, and be beneficial to further improving the operation performance of the pumping assembly.

[0035] In some embodiments, the cross-sectional area of the oil groove 14 is 0.2-4mm 2 , preferably 1-3mm 2 . The cross-sectional area of the oil groove 14 is the flow area of the oil groove 14. By setting the cross-sectional area of the oil groove 14, sufficient flow of the lubricating oil can be ensured to improve the lubricating effect, and at the same time, the mechanical strength of the crankshaft itself will not be adversely affected, thereby ensuring the normal use performance of the crankshaft.

[0036] In some embodiments, an eccentric structure 2 is arranged at the middle and lower end of the crankshaft body 1, the eccentric structure 2 comprises a first end portion 21 and a second end portion 22, the first end portion 21 is located below the second end portion 22, the first end portion 21 is located between the first through hole 12 and the second end portion 22, and the second through hole 13 is arranged between the first end portion 21 and the second end portion 22.

[0037] The eccentric structure 2 is used for connecting with the piston of the pumping assembly. The second through hole 13 is arranged between the first end 21 and the second end 22, and the second through hole 13 is located at the inner circumferential surface of the piston. During the operation of the pumping assembly, the piston reciprocates around the eccentric structure 2. The second through hole 13 is arranged at the inner circumferential surface of the piston, so that the lubricating oil can flow along with the reciprocating motion of the piston, and the lubricating oil can be quickly spread, thereby further enhancing the lubricating effect.

[0038] The crankshaft of the embodiment can better guide the flow of the lubricating oil, so that the lubricating oil can be more smoothly spread between the components of the pumping assembly during the operation of the pumping assembly, and the lubricating effect can be quickly achieved, thereby improving the operation performance of the pumping assembly. The oil groove is arranged in the flow channel, so that the flow of the lubricating oil along the first through hole to the second through hole can be guided and promoted, and the lubricating effect can be further improved, thereby further improving the operation performance of the pumping assembly. The cross-sectional area of the oil groove can ensure sufficient flow of the lubricating oil and improve the lubricating effect, and the mechanical strength of the crankshaft is not affected, thereby ensuring the normal use performance of the crankshaft. The second through hole is arranged between the first end and the second end of the eccentric structure, and the second through hole corresponds to the inner circumferential surface of the piston, which is more conducive to the quick spread of the lubricating oil and the further enhancement of the lubricating effect.

[0039] Embodiment 2

[0040] As a further optimization of embodiment 1, reference is made to Figure 2 The oil groove 14 is in a spiral type. The oil groove 14 includes a third end 141 and a fourth end 142. The third end 141 is in communication with the first through hole 12, and the fourth end 142 is located at the position of the second end 22. In some embodiments, the oil groove 14 can be in communication with the second through hole 13, or can not be in communication with the second through hole 13.

[0041] It can be understood that the lubricating oil at the bottom is stirred by the crankshaft during high-speed rotation, and flows upward along the first through hole 12 to the second through hole 13. Due to the effect of rotational inertia, the lubricating oil tends to flow upward in a spiral manner in the flow channel 11. Therefore, the oil groove 14 is arranged in a spiral type, so as to conform to the flow trend of the lubricating oil and further promote the flowability of the lubricating oil, thereby further improving the lubricating property of the pumping assembly.

[0042] In some embodiments, the number of oil grooves 14 can be one or more. In the case of multiple oil grooves 14, it is preferred that the number of oil grooves 14 is less than or equal to three. In the embodiment, the number of oil grooves 14 is one.

[0043] Embodiment 3

[0044] As a further optimization of embodiment 1, reference is made to Figure 3The oil groove 14 is linear. The oil groove 14 comprises a third end 141 and a fourth end 142. The third end 141 is communicated with the first through hole 12. The fourth end 142 is located at the position of the second end 22. In some embodiments, the oil groove 14 can be communicated with the second through hole 13 or not.

[0045] In some embodiments, the width of the fourth end 142 can be equal to or less than the width of the third end 141, and the latter is preferred. When the width of the fourth end 142 is less than the width of the third end 141, the oil groove 14 is specifically isosceles trapezoidal or conical, thereby more conducive to guiding the lubricating oil to gather from bottom to top, so as to promote the flowability of the lubricating oil, and further improve the lubrication of the pumping assembly.

[0046] In some embodiments, the number of the oil groove 14 can be one or more. In the case of multiple oil grooves 14, preferably, three or less, and in the present embodiment, the number of the oil groove 14 is one.

[0047] Embodiment 4

[0048] As a further optimization of embodiment 1, reference is made to Figure 4 The oil groove 14 is curved, and the number of the oil groove 14 is multiple. The multiple oil grooves 14 are arranged at equal intervals along the circumference of the crankshaft body 1. The number of the oil groove 14 is preferably two to three, and in the present embodiment, the number of the oil groove 14 is three. The arrangement of the multiple curved oil grooves 14 along the circumference of the crankshaft body 1 makes the flow trend of the lubricating oil after being guided by the oil groove 14 to be outwardly expanded upward, so that the flow passage 11 can be uniformly filled with lubricating oil, which is conducive to improving the lubrication between the crankshaft and the piston, and also conducive to the rapid diffusion of the lubricating oil to each component of the pumping assembly, so as to improve the lubrication of the pumping assembly.

[0049] The oil groove 14 comprises a third end 141 and a fourth end 142. The third end 141 is communicated with the first through hole 12. The fourth end 142 is located between the first through hole 12 and the second through hole 13. In the present embodiment, the fourth end 142 is located between the first end 21 and the first through hole 12. Through the optimization of the shape, number and arrangement of the oil groove 14, the guiding and promoting effect of the oil groove 14 is further enhanced. Therefore, in the present embodiment, the fourth end 142 only needs to be arranged between the first end 21 and the first through hole 12, thereby shortening the length of the oil groove 14, which is conducive to reducing the production process cost of the crankshaft, and also conducive to enhancing the mechanical strength of the crankshaft, so as to improve the operating performance of the pumping assembly. In the present embodiment, the length of the oil groove 14 is 3-10 mm.

[0050] Embodiment 5

[0051] Reference is made toFigure 5 The pump assembly provided by the embodiment comprises a piston 100, a cylinder body 200, a first support 300, a second support 400 and the crankshaft 500 in any one of embodiments 2-4, the first support 300, the piston 100 and the second support 400 are sequentially sleeved on the crankshaft 500 from bottom to top, and the cylinder body 200 is sleeved outside the piston 100.

[0052] The first through hole 12 is located at the bottom of the first support 300, and the second through hole 13 is located at the middle of the piston 100. During operation of the pump assembly, the piston 100 reciprocates, and when the lubricating oil reaches the position of the piston 100 through the first through hole 12, the flow channel 11 and the second through hole 13, the reciprocation of the piston 100 can further promote the diffusion of the lubricating oil, so that the lubricating oil can quickly play a lubricating role, thereby improving the lubricity of the pump assembly.

[0053] The pump assembly of the embodiment can make the lubricating oil quickly reach between various components and form an oil film during high-speed operation of the pump assembly, quickly play a lubricating role, thereby improving the operation performance of the pump assembly, and further improving the overall performance of the compressor.

[0054] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0055] In the description of the present application, it should be pointed out that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation, and cannot be understood as indicating or implying relative importance.

[0056] In the utility model, unless another definite provision and limitation, first feature is above or below second feature can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them.

[0057] Although the description of the utility model is combined with above specific embodiment, it is obvious that many substitutions, modifications and changes can be made according to the above-mentioned content by the person skilled in the art. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. A crankshaft, characterized by The crankshaft body (1) is internally provided with a flow channel (11) in the axial direction, one end of the crankshaft body (1) is provided with a first through hole (12), the side wall of the crankshaft body (1) is provided with a second through hole (13), and the first through hole (12) and the second through hole (13) are in communication with the flow channel (11). An oil groove (14) is formed on the inner wall of the flow channel (11), and one end of the oil groove (14) is communicated with the first through hole (12).

2. The crankshaft of claim 1 wherein, The cross-sectional area of the oil groove (14) is 0.2 to 4 mm 2 .

3. The crankshaft of claim 1 wherein, An eccentric structure (2) is arranged on the crankshaft body (1), the eccentric structure (2) comprises a first end portion (21) and a second end portion (22), the first end portion (21) is located between the first through hole (12) and the second end portion (22), and the second through hole (13) is arranged between the first end portion (21) and the second end portion (22).

4. The crankshaft of claim 3, wherein The oil groove (14) is in a spiral type.

5. The crankshaft of claim 3 wherein, The oil groove (14) is in a straight line type.

6. The crankshaft according to claim 4 or 5, characterized in that The oil groove (14) comprises a third end portion (141) and a fourth end portion (142), the third end portion (141) is communicated with the first through hole (12), and the fourth end portion (142) is located at the position of the second end portion (22).

7. The crankshaft of claim 3 wherein, The oil groove (14) is in a curved type, and the number of the oil groove (14) is multiple, and multiple oil grooves (14) are arranged along the circumference of the crankshaft body (1).

8. The crankshaft of claim 7, wherein The oil groove (14) comprises a third end portion (141) and a fourth end portion (142), the third end portion (141) is communicated with the first through hole (12), and the fourth end portion (142) is located between the first through hole (12) and the second through hole (13).

9. The crankshaft of claim 8, wherein The length of the oil groove (14) is 3-10mm.

10. A pumping assembly characterized by, The piston (100), the cylinder body (200), the first support (300), the second support (400) and the crankshaft (500) of any one of claims 1-9 are sequentially sleeved on the crankshaft (500) from bottom to top, and the cylinder body (200) is sleeved outside the piston (100).

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