Crankshaft and compressor

Abstract

The crankshaft and the compressor comprise a short shaft, a long shaft and an eccentric part, the eccentric part is arranged between the long shaft and the short shaft, a first oil outlet hole is formed between the eccentric part and the long shaft, and a second oil outlet hole is formed between the eccentric part and the short shaft; a groove is formed in the end, close to the first oil outlet hole, of the circumferential face of the long shaft, and / or a groove is formed in the end, close to the second oil outlet hole, of the circumferential face of the short shaft. According to the arrangement, the lubrication degree of the eccentric part of the crankshaft is improved through the slotting design, and the viscous resistance of an oil film is effectively reduced.

Description

TECHNICAL FIELD

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

[0002] The long shaft and short shaft of the compressor crankshaft are prone to eccentric wear with the upper and lower cylinder head bearing, and the cylinder head and crankshaft side wall are prone to wear after long time work. There is a lack of a simple and effective technical solution to solve the above problems in the industry. SUMMARY

[0003] The utility model discloses a crankshaft and compressor, improve the lubrication of crankshaft journal through the design of grooving, and reduce the viscous resistance of oil film.

[0004] To realize above-mentioned purpose, the utility model provides a crankshaft, including short shaft, long shaft and eccentric part, the eccentric part is located between the long shaft and the short shaft, is equipped with the first oil outlet hole between the eccentric part and the long shaft, is equipped with the second oil outlet hole between the eccentric part and the short shaft, the long shaft is equipped with the recess in the one end of its circumferential surface near the first oil outlet hole, and / or, the short shaft is equipped with the recess in the one end of its circumferential surface near the second oil outlet hole.

[0005] Optionally, the recess penetrates the one end of the long shaft in its circumferential surface near the first oil outlet hole, and / or, the recess penetrates the one end of the short shaft in its circumferential surface near the second oil outlet hole.

[0006] Optionally, in the cross section along the radial direction of the crankshaft within the range of the recess, if the intersection of the axis of the crankshaft and the cross section is taken as the center, and the two sides of the recess and the center can form an included angle, then the included angle is less than 120 degrees.

[0007] Optionally, the depth of the recess is less than or equal to 0.5mm.

[0008] Optionally, the side wall of the recess is provided with a step.

[0009] Optionally, the recess is smoothly connected with the circumferential surface of the shaft.

[0010] Optionally, in the cross section along the radial direction of the crankshaft within the range of the recess, if the intersection of the axis of the crankshaft and the cross section is taken as the center, and the distance between the vertex of the side wall of the two sides of the recess and the center is taken as the radius of the first circular shape, and the intersection of the axis of the crankshaft and the cross section is taken as the center, and the bottom of the recess is taken as the circular shape of the second circular shape of the arc, then the first circular shape and the second circular shape are concentric circles.

[0011] Optionally, a first circle and a second circle can be drawn in a cross-section along the radial direction of the crankshaft within the groove; the first circle has the intersection of the axis of the crankshaft and the cross-section as its center, and the distance between the endpoints on both sides of the groove and the center as its radius; the second circle has the bottom of the groove as its arc; the first circle and the second circle intersect.

[0012] Optionally, the crankshaft is provided with a plurality of the eccentric portions.

[0013] This utility model also provides a compressor, including a crankshaft as described in any of the above.

[0014] The crankshaft and compressor provided by this utility model have the following beneficial effects:

[0015] This invention provides a crankshaft, including a short shaft, a long shaft, and an eccentric portion. The eccentric portion is disposed between the long shaft and the short shaft. A first oil outlet hole is provided between the eccentric portion and the long shaft, and a second oil outlet hole is provided between the eccentric portion and the short shaft. The long shaft has a groove at one end of its circumferential surface near the first oil outlet hole, and / or the short shaft has the groove at one end of its circumferential surface near the second oil outlet hole. With this arrangement, this invention utilizes a slotted design to improve the lubrication of the eccentric portion of the crankshaft and effectively reduce the viscous resistance of the oil film.

[0016] This invention also provides a compressor comprising a crankshaft as described in any of the above descriptions. Because the compressor includes the crankshaft, the compressor utilizes a slotted design to improve the lubrication of the eccentric portion of the crankshaft and effectively reduce the viscous resistance of the oil film.

[0017] Since the compressor provided by this utility model belongs to the same utility model concept as the crankshaft described above, the compressor provided by this utility model has all the advantages of the crankshaft described above. Therefore, the beneficial effects of the compressor provided by this utility model will not be described in detail here. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the crankshaft provided in one embodiment of the present invention.

[0019] Figure 2 This is a schematic cross-sectional view of the groove along the radial direction of the crankshaft, provided in the first embodiment of the present invention.

[0020] Figure 3 This is a schematic cross-sectional view of the groove along the radial direction of the crankshaft, provided for the second embodiment of the present invention.

[0021] The attached figures are labeled as follows:

[0022] 1-Long shaft; 2-Short shaft; 3-Eccentric part; 10-First oil outlet; 11-Groove; 20-Second oil outlet. Detailed Implementation

[0023] To make the objectives, advantages, and features of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to facilitate and clarify the explanation of the objectives of the embodiments of this utility model. Furthermore, the structures shown in the drawings are often part of the actual structure. In particular, different drawings may emphasize different aspects and sometimes use different scales.

[0024] It should be understood that when an element or layer is referred to as "on" or "connected to" other elements or layers, it may be directly on or connected to other elements or layers, or may include intervening elements or layers. Conversely, when an element is referred to as "directly on" or "directly connected to" other elements or layers, it does not include intervening elements or layers. Although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or parts, these elements, components, areas, layers, and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or part from another element, component, area, layer, or part. Therefore, without departing from the teachings of this utility model, the first element, component, area, layer, or part discussed below may be referred to as a second element, component, area, layer, or part. Spatial relation terms such as "below," "under," "below," "above," "on top," "above," etc., may be used herein for convenience of description to describe the relationship between one element or feature shown in the figures and other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatial relational terms are intended to also include different orientations of the devices in use and operation. For example, if the devices in the figures are flipped, then elements or features described as “below,” “under,” or “below” will be oriented “on” other elements or features. Devices may be oriented additionally (rotated 90 degrees or otherwise) and the spatial descriptive terms used herein will be interpreted accordingly. The terminology used herein is intended only to describe particular embodiments and is not intended to limit the invention. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “comprising” is used to identify the inclusion of features, steps, operations, elements, and / or components, but does not exclude the inclusion or addition of one or more other features, steps, operations, elements, components, and / or groups. When used herein, the terms “and / or” include any and all combinations of the associated listed items.

[0025] The purpose of this invention is to provide a crankshaft and compressor that improves the lubrication of the crankshaft journal and reduces the viscous resistance of the oil film through a slotted design.

[0026] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the crankshaft provided in one embodiment of the present invention. Figure 1 As shown, to achieve the above objectives, this utility model provides a crankshaft, including a short shaft 2, a long shaft 1, and an eccentric portion 3. The eccentric portion 3 is disposed between the long shaft 1 and the short shaft 2. A first oil outlet hole 10 is provided between the eccentric portion 3 and the long shaft 1, and a second oil outlet hole 20 is provided between the eccentric portion 3 and the short shaft 2. The long shaft 1 has a groove 11 at one end of its circumferential surface near the first oil outlet hole 10, and / or the short shaft 2 has the groove 11 at one end of its circumferential surface near the second oil outlet hole 20. With this configuration, this utility model improves the lubrication of the eccentric portion of the crankshaft by utilizing the groove design and effectively reduces the viscous resistance of the oil film.

[0027] Furthermore, the groove 11 extends through the long shaft 1 at one end of its circumference near the first oil hole 10, and / or, the groove 11 extends through the short shaft 2 at one end of its circumference near the second oil hole 20. This arrangement allows the oil discharged from the oil outlet to better fit with the groove.

[0028] It should be noted that the parameters of the groove in this invention are limited to achieve optimal working conditions as much as possible. In an exemplary embodiment, in a cross-section along the radial direction of the crankshaft within the groove, if the intersection of the crankshaft axis and the cross-section is taken as the center, and the two sides of the groove form an angle with the center, then the angle is less than 120 degrees. Preferably, the depth of the groove is less than or equal to 0.5 mm.

[0029] The groove can be of various shapes, as long as it is recessed inward relative to its circumference. In one exemplary embodiment, the sidewall of the groove may be stepped. In another exemplary embodiment, the groove is smoothly connected to the circumference of the shaft.

[0030] Please refer to Figure 2 , Figure 2 This is a schematic cross-sectional view of the groove along the radial direction of the crankshaft, provided in the first embodiment of the present invention. Figure 2As shown, to further standardize the opening of the groove, in the cross-section along the radial direction of the crankshaft within the groove area, if the intersection point O of the crankshaft axis and the cross-section is taken as the center, and the distance between the vertices A and C of the side walls on both sides of the groove and the center is taken as the radius, then the first circle is defined as the circle centered at the intersection point O of the crankshaft axis and the cross-section, and the bottom of the groove is defined as the arc (endpoint is...). Figure 2 If the circle in B and D is the second circle, then the first circle and the second circle are concentric circles. At this time, the cross-section of the groove forms a U-shaped structure.

[0031] Preferably, a first circle and a second circle can be drawn in a cross-section along the radial direction of the crankshaft within the groove area; the first circle has the intersection of the crankshaft axis and the cross-section as its center, and the distance between the endpoints of the groove and the center as its radius; the second circle has the bottom of the groove as its arc; the first circle and the second circle intersect. Please refer to [reference needed] for details. Figure 3 , Figure 3 This is a schematic cross-sectional view of the groove along the radial direction of the crankshaft within the second embodiment of the present invention. In the cross-section along the radial direction of the crankshaft within the groove, if a circle is formed with the intersection point O of the crankshaft axis and the cross-section as its center, and the distances from the endpoints E and F on both sides of the groove to the center as its radius, this is considered a first circle; and a circle with the bottom of the groove as an arc is considered a second circle. Then, the first circle and the second circle intersect. It should be noted that the center of the second circle is clearly no longer the center O of the first circle. At this time, the cross-section of the groove forms a crescent-shaped structure.

[0032] Preferably, the crankshaft is provided with a plurality of the eccentric portions 3.

[0033] This invention also provides a compressor, including a crankshaft as described in any of the above descriptions. A compressor is a driven fluid machine that elevates low-pressure gas to high-pressure gas, and is the heart of a refrigeration system. It draws in low-temperature, low-pressure refrigerant gas through a suction pipe, compresses it using a piston driven by a motor, and then discharges high-temperature, high-pressure refrigerant gas through an exhaust pipe, providing power for the refrigeration cycle. Because the compressor includes the crankshaft, the compressor utilizes a slotted design to improve the lubrication of the eccentric portion of the crankshaft and effectively reduce the viscous resistance of the oil film.

[0034] Since the compressor provided by this utility model belongs to the same utility model concept as the crankshaft described above, the compressor provided by this utility model has all the advantages of the crankshaft described above. Therefore, the beneficial effects of the compressor provided by this utility model will not be described in detail here.

[0035] Through comparative experiments conducted by the inventors, this invention significantly reduces compressor input under high-speed operating conditions (new national standard, rated heating, low-temperature heating), while improving both cooling capacity and input under low-speed operating conditions (intermediate cooling, low-temperature intermediate cooling). Overall, the compressor's APF and new national standard COP are both improved by approximately 0.2%. This will accumulate to generate significant benefits in large-scale applications.

[0036] It should also be noted that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the present invention without departing from the scope of the present invention, or equivalent embodiments can be modified based on the disclosed technical content. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention shall still fall within the protection scope of the present invention.

[0037] It should also be understood that, unless otherwise specified or indicated, the terms “first,” “second,” “third,” etc., in the specification are used only to distinguish the various components, elements, and steps in the specification, and not to indicate the logical or sequential relationships between the various components, elements, and steps.

[0038] Furthermore, it should be recognized that the terminology described herein is used only to describe particular embodiments and not to limit the scope of the invention. It must be noted that the singular forms “a” and “an” used herein and in the appended claims include plural bases unless the context clearly indicates otherwise. For example, a reference to “a step” or “an apparatus” means a reference to one or more steps or apparatuses, and may include secondary steps and secondary apparatuses. All conjunctions used should be understood in the broadest sense. Also, the word “or” should be understood to have the definition of logical “or” rather than logical “exclusive OR”, unless the context clearly indicates otherwise. Furthermore, implementation of embodiments of the invention may include performing selected tasks manually, automatically, or in combination.

Claims

1. A crankshaft, characterized by The crankshaft comprises a short shaft, a long shaft and an eccentric part, the eccentric part is arranged between the long shaft and the short shaft, a first oil outlet hole is arranged between the eccentric part and the long shaft, and a second oil outlet hole is arranged between the eccentric part and the short shaft. The long shaft is provided with a groove at one end of its circumferential surface close to the first oil outlet hole, and / or the short shaft is provided with the groove at one end of its circumferential surface close to the second oil outlet hole.

2. The crankshaft of claim 1 wherein, The groove penetrates one end of the circumferential surface of the long shaft close to the first oil outlet hole, and / or the groove penetrates one end of the circumferential surface of the short shaft close to the second oil outlet hole.

3. The crankshaft of claim 1 wherein, In a cross section along the radial direction of the crankshaft within the range of the groove, if the intersection of the axis of the crankshaft and the cross section is taken as the center, and the two sides of the groove and the center can form an angle, the angle is less than 120 degrees.

4. The crankshaft of claim 1 wherein, The depth of the groove is less than or equal to 0.5mm.

5. The crankshaft of claim 1 wherein, The side wall of the groove is provided with a step.

6. The crankshaft of claim 1 wherein, The groove is smoothly connected with the circumferential surface of the shaft.

7. The crankshaft of claim 1 wherein, In a cross section along the radial direction of the crankshaft within the range of the groove, if the intersection of the axis of the crankshaft and the cross section is taken as the center, the circle with the distance between the vertex of the side wall of the groove on both sides and the center as the radius is the first circle, the intersection of the axis of the crankshaft and the cross section is taken as the center, and the circle with the bottom of the groove as the arc is the second circle, the first circle and the second circle are concentric circles.

8. The crankshaft of claim 1 wherein, The first circle and the second circle can be drawn in the cross section along the radial direction of the crankshaft within the range of the groove. The first circle takes the intersection of the axis of the crankshaft and the cross section as the center, and takes the distance between the end point on both sides of the groove and the center as the radius. The second circle takes the bottom of the groove as the arc. The first circle and the second circle intersect.

9. The crankshaft of claim 1 wherein, The crankshaft is provided with a plurality of eccentric parts.

10. A compressor characterized by, The crankshaft comprises a short shaft, a long shaft and an eccentric part, the eccentric part is arranged between the long shaft and the short shaft, a first oil outlet hole is arranged between the eccentric part and the long shaft, and a second oil outlet hole is arranged between the eccentric part and the short shaft.

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