A bearing lubrication assembly and a compressor including the same

Abstract

The present invention provides a bearing lubrication assembly and a compressor including the same. The bearing lubrication assembly includes: a bearing seat, a filling groove is provided on the inner peripheral wall of the bearing seat; an oil absorption structure, which is arranged in the filling groove, is used for adsorbing lubricating oil, and can expand in volume after adsorbing the lubricating oil, and can release the lubricating oil when being compressed; a bearing, which is arranged in the bearing seat, an oil passage hole is provided on the bearing, the bearing can extrude the oil absorption structure, and the lubricating oil released by the oil absorption structure can flow into the inner side of the bearing through the oil passage hole. By arranging a filling groove at the bearing seat to fill the oil absorption structure, and using the oil absorption structure to adsorb a sufficient amount of lubricating oil, and cooperating with the extrusion of the bearing to release the lubricating oil, the present invention can quickly release the lubricating oil to lubricate the bearing when the compressor is just started, so as to reduce the wear and frictional power consumption at the bearing and improve the performance.

Description

Technical Field

[0001] The present invention relates to the field of lubrication, and in particular to a bearing lubrication assembly and a compressor including the same. Background Art

[0002] A scroll compressor mainly consists of a moving scroll disk assembly, a stationary scroll disk assembly, a crankshaft assembly, an upper bracket assembly, a lower bracket assembly, a housing and a motor, and has the characteristics of simple structure, small volume, light weight, low noise, high mechanical efficiency and stable operation. There are scroll teeth on the moving and stationary scroll disks. The two disks are eccentric by a certain distance and have a phase difference of 180° and are engaged with each other to form a compression chamber for compressing the refrigerant. The crankshaft is a rotating component of the scroll compressor and is an eccentric shaft. The crankshaft rotates under the drive of the motor. The eccentric part of the crankshaft is connected to the moving disk and drives the moving disk to translate under the combined action of a cross slip ring. The function of the cross slip ring is to prevent the moving scroll disk from rotating by itself. The crankshaft drives the moving disk to move periodically to realize the periodic change of the volume of the compression chamber and complete the whole process of suction, compression and exhaust of the compression chamber.

[0003] During the rotation of the crankshaft, due to the unbalanced mass of the moving disk and eccentric components and the unbalanced centrifugal force and centrifugal moment of the parts on the shafting assembly, friction and frictional power consumption will occur with the radial contact surface of the shafting. The radial support surface of the crankshaft mainly contacts the upper and lower bracket bearings. And from the beginning of the compressor operation, the compressor lubricating oil reaches the radial oil outlet holes of the main and auxiliary journal diameters of the crankshaft from the bottom oil sump of the compressor via the central oil hole of the crankshaft, and then reaches the contact surface between the crankshaft and the upper and lower bracket bearings.

[0004] The oil path of the conventional compressor lubricating bearing is that the lubricating oil goes up from the bottom oil sump via the central oil hole of the crankshaft, reaches the upper and lower bracket bearings, and reaches between the crankshaft and the bearing through the radial oil outlet holes. The path that the lubricating oil flows through is relatively long. During the period from the start of the compressor to the arrival of the lubricating oil at the bearing, the bearing is in a state of lack of oil. At this time, the friction between the bearing and the crankshaft is relatively large, and the crankshaft is prone to wear during long-term frequent starting and stopping of the compressor, resulting in large frictional power consumption of the compressor and reduced performance. Summary of the Invention

[0005] In view of this, the present invention provides a bearing lubrication assembly and a compressor including the same, which are at least used to solve the technical problem of untimely bearing lubrication in the prior art. Specifically:

[0006] In a first aspect, the present invention provides a bearing lubrication assembly, including:

[0007] A bearing seat, on the inner peripheral wall of which a filling groove is provided;

[0008] An oil absorption structure, arranged in the filling groove, for adsorbing lubricating oil, and capable of expanding in volume after adsorbing the lubricating oil and releasing the lubricating oil when being compressed;

[0009] A bearing is arranged inside the bearing housing. An oil passage hole is arranged on the bearing. The bearing can extrude the oil absorption structure so that the oil absorption structure releases lubricating oil and the lubricating oil flows into the dynamic and static contact part inside the bearing through the oil passage hole.

[0010] Further optionally, the filling groove is an annular groove formed by circumferentially extending along the inner peripheral wall of the bearing housing;

[0011] At least one filling groove is distributed radially along the bearing housing.

[0012] Further optionally, a plurality of oil passage holes are evenly distributed on the side wall of the bearing.

[0013] Further optionally, the bearing lubrication assembly further includes:

[0014] A rotating shaft is rotatably arranged inside the bearing;

[0015] A shrapnel includes a mounting part and an elastic part. The mounting part is located inside the filling groove. The shrapnel is arranged outside the oil absorption structure. The elastic part can extrude the oil absorption structure.

[0016] The bearing is provided with the oil passage hole at least at a position corresponding to the filling groove. The elastic part can pass through the oil passage hole and abut against the rotating shaft.

[0017] Further optionally, the mounting part and the elastic part are integrally formed, and an included angle is formed between the mounting part and the elastic part.

[0018] The mounting part is used for fixedly connecting to the side wall of the filling groove.

[0019] Further optionally, a cut surface is formed on the side wall of the rotating shaft.

[0020] The elastic part can abut against the cut surface. When the rotating shaft rotates, the elastic part can periodically contact the cut surface.

[0021] Further optionally, the cut surface is a surface formed on the mating part of the rotating shaft and the bearing and having the same axial dimension as the bearing, or

[0022] The cut surface is the bottom wall surface of a groove formed on the mating part of the rotating shaft and the bearing.

[0023] Further optionally, the cut surface is a plane or an arc surface formed along the circumference of the rotating shaft.

[0024] Further optionally, one or more shrapnels are arranged along the circumference of the filling groove.

[0025] Each of the elastic pieces corresponds to one of the oil passing holes.

[0026] In a second aspect, the present invention provides a compressor, including the above-mentioned bearing lubrication assembly.

[0027] In a third aspect, the present invention provides a compressor, including the above-mentioned bearing lubrication assembly, and the rotating shaft constitutes the crankshaft of the compressor.

[0028] Further optionally, a central oil hole is axially formed in the crankshaft, and a radial oil hole communicating with the central oil hole is provided at a portion where the crankshaft is in contact with the bearing. Through the central oil hole and the radial oil hole, lubricating oil can flow to between the crankshaft and the bearing.

[0029] By providing a filling groove at the bearing seat to fill the oil absorption structure, and using the oil absorption structure to adsorb a sufficient amount of lubricating oil, and cooperating with the extrusion of the bearing or the elastic piece to release the lubricating oil, the lubricating oil can be quickly released to lubricate the bearing when the compressor starts, so as to reduce the wear and frictional power consumption at the bearing and improve the performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] By referring to the accompanying drawings and describing its exemplary embodiments in detail, the above and other objects, features and advantages of the present disclosure will become more apparent. The following described drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 A cross-sectional schematic view of the compressor according to an embodiment of the present invention is shown;

[0032] Figure 2 A schematic structural view of the bearing lubrication assembly according to an embodiment of the present invention (the elastic piece is in contact with the section plane) is shown;

[0033] Figure 3 A schematic structural view of the bearing lubrication assembly according to an embodiment of the present invention (the elastic piece is not in contact with the section plane) is shown;

[0034] Figure 4 A cross-sectional schematic view of the bearing seat according to an embodiment of the present invention is shown;

[0035] Figure 5 A cross-sectional schematic view of the bearing seat according to another embodiment of the present invention is shown;

[0036] Figure 6 A schematic structural view of the rotating shaft according to an embodiment of the present invention is shown;

[0037] Figure 7 A schematic structural view of the elastic piece according to an embodiment of the present invention is shown;

[0038] Figure 8Shows a schematic structural diagram of the bearing according to an embodiment of the present invention;

[0039] Figure 9 Shows a schematic structural diagram of the bearing according to another embodiment of the present invention.

[0040] In the figure:

[0041] 1. Upper cover; 2. Stationary scroll plate; 3. Moving scroll plate; 4. Cross slip ring; 5. Upper bracket; 6. Crankshaft; 7. Main balance weight; 8. Motor rotor; 9. Stator; 10. Housing; 11. Auxiliary balance weight; 12. Lower bracket; 13. Lower support ring; 14. Lower cover; 15. Oil pump; 18. Bearing; 20. Oil suction structure; 21. Filling groove; 22. Elastic piece; 23. Central oil hole; 24. Radial oil hole; 25. Section plane; 181. Oil passing hole; 51. Bearing seat; 221. Installation part; 222. Elastic part. Detailed implementation manners

[0042] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0043] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "said" used in the embodiments of the present invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. "Plural" generally includes at least two, but does not exclude the case of including at least one.

[0044] It should be understood that the term "and / or" used herein is only a description of the associated relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0045] It should also be noted that the term "comprises", "comprising" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a commodity or system including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such commodity or system. Without more limitations, the element defined by the statement "including one..." does not exclude the existence of another identical element in the commodity or system including the said element.

[0046] In the present invention, an oil absorption structure is filled in a filling groove opened at the bearing seat, and the oil absorption structure adsorbs a sufficient amount of lubricating oil. Cooperating with the extrusion of the bearing or the elastic piece to release the lubricating oil, the lubricating oil can be quickly released to lubricate the bearing when the compressor starts, so as to reduce the wear and frictional power consumption at the bearing and improve the performance. The present invention will be introduced in detail below with reference to specific embodiments:

[0047] As Figure 2-9 shown, the present invention provides a bearing lubrication assembly, including:

[0048] A bearing seat 51, on the inner peripheral wall of which a filling groove 21 is provided;

[0049] An oil absorption structure 20, disposed in the filling groove 21, for adsorbing lubricating oil, and capable of expanding in volume after adsorbing the lubricating oil, and capable of releasing the lubricating oil when being compressed;

[0050] A bearing 18, disposed in the bearing seat 18, with an oil passing hole 181 provided on the bearing 18. The bearing 18 can extrude the oil absorption structure 20, and the lubricating oil released by the oil absorption structure 20 can flow into the dynamic and static contact part inside the bearing 18 through the oil passing hole 181.

[0051] Preferably, as Figure 4 shown, the filling groove 21 is an annular groove formed by circumferentially extending along the inner peripheral wall of the bearing seat 18. At least one filling groove 21 is radially distributed along the bearing seat 51. The oil absorption structure 20 is a circular ring structure and is embedded in the filling groove 21. At least after its oil absorption and expansion, it can partially extend out of the filling groove 21, that is, after the oil absorption structure 20 absorbs oil and expands, it can abut against the outer wall of the bearing 18. When the bearing 18 is stressed and undergoes a small displacement, the oil absorption structure 20 can be extruded to release the lubricating oil.

[0052] In other embodiments, as Figure 5 shown, the filling groove 21 can also be set as a plurality of straight grooves parallel to the axis of the bearing seat 51, or a plurality of discontinuous arc grooves formed along the circumference of the bearing seat 51, etc. The shape of the oil absorption structure 20 corresponds to the filling groove 21, so that it can be loaded into the filling groove 21.

[0053] Preferably, the oil absorption structure 20 is made of foam or resin materials, such as polyurethane foam materials. In this embodiment, the specific type of the oil absorption structure 20 is not limited, as long as it has a certain elasticity, can adsorb lubrication, and has a certain high-temperature resistance.

[0054] In the first embodiment of the present invention, as Figure 9 shown, the oil passing hole 181 is a circular through hole, and a plurality of them are evenly distributed on the side wall of the bearing 18, so that the lubricating oil can flow evenly into the inside of the bearing 18.

[0055] In the second embodiment, as Figure 2 , Figure 3 shown, the bearing lubrication assembly further includes:

[0056] A rotating shaft rotatably passing through the bearing 18. There is a combination of static and dynamic between the rotating shaft and the bearing 18, and the rotating shaft can rotate relative to the bearing 18;

[0057] A shrapnel 22, as Figure 7 shown, includes a mounting portion 221 and an elastic portion 222. The mounting portion 221 is located in the filling groove 21. As Figure 8 shown, at least a position corresponding to the filling groove 21 on the bearing 18 is provided with an oil passing hole 181. The elastic portion 222 can pass through the oil passing hole 181 and abut against the rotating shaft. When the rotating shaft rotates, the elastic portion 222 can be squeezed to cause elastic deformation, so as to squeeze the oil absorption structure 20 through the elastic portion 222 to release lubricating oil.

[0058] As Figure 7 shown, the mounting portion 221 and the elastic portion 222 are integrally formed. An included angle is formed between the mounting portion 221 and the elastic portion 222. The mounting portion 221 is used for fixedly connecting to the side wall of the filling groove 21. Preferably, it is fixed by bonding or screws, etc. The included angle formed between the elastic portion 222 and the mounting portion 221 enables the elastic portion 222 to extend to the front side of the opening of the filling groove 21, so that when the elastic portion 222 is pressurized and elastically deformed, the oil absorption structure 20 can be squeezed.

[0059] Preferably, the mounting portion 221 can also be configured as a bent structure. For example, it is configured as a three-section structure, which can be embedded into the filling groove 21 and respectively fit with the two side walls and the bottom wall of the filling groove 21. The three-section structure can realize snap connection and fixation with the filling groove 21, so as to make the installation of the shrapnel 22 more convenient. One or more shrapnels 22 are arranged along the circumferential direction of the filling groove 21, and each shrapnel 22 corresponds to an oil passing hole 181.

[0060] The oil absorption structure 20 is embedded into the filling groove 21, and a part of the oil absorption structure 20 is located inside the shrapnel 22 and fits with the shrapnel 22.

[0061] At least a part of the oil passing holes 181 on the bearing 18 are correspondingly arranged with the shrapnel 22, and the elastic portion 222 can pass through the oil passing hole 181 to contact the rotating shaft. For example, the oil passing hole 181 corresponding to the shrapnel 22 can be set as a rectangular hole, and each shrapnel 22 corresponds to an oil passing hole 181. Preferably, oil passing holes 181 can also be provided at positions on the bearing 18 that do not correspond to the shrapnel 22, and the shapes of the oil passing holes 181 at other positions do not need to be limited.

[0062] As Figure 6As shown, preferably, a cut surface 25 is formed on the side wall of the rotating shaft. The elastic part 222 can abut against the cut surface 25. When the rotating shaft rotates, the elastic part 222 can periodically contact the cut surface 25. When the elastic piece 22 contacts the cut surface 25, it is in a stretched state, and when it contacts other parts, it is in a compressed state, so as to squeeze the oil absorption structure 20 to release lubricating oil.

[0063] Preferably, the cut surface 25 is a surface formed on the mating part of the rotating shaft and the bearing 18 and having the same axial dimension as the bearing 18, that is, the cut surface 25 completely covers the mating part of the rotating shaft and the bearing 18 in the length direction; or, the cut surface 25 is the bottom wall surface of the groove formed in the mating part of the rotating shaft and the bearing 18, that is, the cut surface 25 is only formed at the position corresponding to the elastic piece 22.

[0064] Furthermore, the cut surface 25 is a flat surface, which can provide a larger space for the expansion and contraction of the elastic piece 22, or the cut surface 25 is an arc surface formed along the circumferential direction of the rotating shaft, making the sliding of the elastic piece 22 smoother.

[0065] The present invention also provides a compressor, including the above-mentioned bearing lubrication assembly. The rotating shaft constitutes the crankshaft 6 of the compressor. Preferably, the compressor is a scroll compressor. A central oil hole 23 is formed axially in the crankshaft 6. A radial oil hole 24 communicating with the central oil hole 23 is provided at the part where the crankshaft 6 mates with the bearing 18. Through the central oil hole 23 and the radial oil hole 24, lubricating oil can flow to between the crankshaft 6 and the bearing 18. Specifically,

[0066] As Figure 1 shown, the compressor includes a housing, which is composed of a housing 10 and an upper cover 1 and a lower cover 14 sealed to both ends of the housing 10. Inside the housing, there are a stationary scroll disk 2, a moving scroll disk 3, a cross slip ring 4, an upper bracket 5, a crankshaft 6, a main balance weight 7, a motor rotor 8, a stator 9, a housing 10, a sub-balance weight 11, a lower bracket 12, and a lower support ring 13. The upper bracket 5 is fixed to the housing 10 by eight-point welding. A bearing seat 51 is formed on the upper bracket 5. The stationary scroll disk 2 and the moving scroll disk 3 are mutually engaged and installed on the upper bracket 5. The moving scroll disk 3 and the stationary scroll disk 2 are mutually meshed to form a series of mutually independent crescent-shaped sealed cavities with changing volume shapes. The stationary scroll disk 2 is fixed to the upper bracket 5 by screw fasteners. The lower bracket 12 is locked with the lower support ring 13 by screws, and the lower support ring 13 is fixed to the housing 10 by welding points. An oil pump 15 is arranged at the bottom for pumping lubricating oil into the central oil hole 23 of the crankshaft 6 to lubricate the mating part of the crankshaft 6 and the bearing 18.

[0067] When the compressor operates, the motor rotor 8 drives the crankshaft 6 to rotate. The eccentric part crank of the crankshaft 6 drives the moving scroll disk 3, and the cross slip ring 4 restricts the rotation of the moving scroll disk 3. The moving scroll disk 3 translates around the center of the crankshaft 6 with a fixed radius.

[0068] Preferably, when the compressor starts up, the crankshaft 6 drives the bearing 18 to produce a certain amount of displacement, and the compression oil suction structure 20 releases lubricating oil to lubricate between the crankshaft 6 and the bearing 18.

[0069] A filling groove 21 is formed on the bearing seat 51, a spring piece 22 is installed in the filling groove 21, and then the lubricating oil suction structure 20 is filled in the filling groove 21. An oil passing hole 181 is formed on the bearing 18. After the suction structure 20 adsorbs enough lubricating oil, it expands and just fills the annular filling groove 21. At this time, the section plane 25 of the crankshaft 6 faces the spring piece 22, and the spring piece 22 is in the space avoided by the section plane 25 and is not squeezed. When the compressor is not started, the spring piece 22 faces the section plane 25 at the main shaft of the crankshaft 6. When filling the lubricating oil suction structure 20, the suction structure 20 should adsorb enough saturated lubricating oil. After the suction structure 20 absorbs enough lubricating oil, it expands and fills into the oil passing hole 181 on the bearing 18. When the compressor starts up, the section plane 25 of the crankshaft 6 faces the spring piece 22, and the spring piece 22 is not squeezed. After running, the section plane 25 of the rotating crankshaft 6 turns to other places, and the curved surface of the main shaft of the crankshaft 6 begins to squeeze the spring piece 22. Under the squeezing action of the spring piece 22, the lubricating oil in the suction structure 20 can be instantly squeezed out and flow to between the crankshaft 6 and the bearing, achieving the effect of instant lubrication, and the lubricating oil in the suction structure 20 will shrink after being squeezed out. After the compressor runs for a period of time, the oil supply of the central oil hole 23 and the radial oil hole 24 of the crankshaft 6 is sufficient to ensure the lubrication of the bearing 18. The sufficient lubricating oil can enable the lubricating oil adsorption and expansion material to adsorb enough saturated lubricating oil again, so that the bearing 18 can be quickly lubricated again when starting and stopping next time, achieving the effect that the bearing 18 can be quickly lubricated every time the compressor starts. The effect of reducing the friction power consumption at the bearing 18 and improving the performance of the compressor.

[0070] Preferably, a bearing seat is also formed on the lower bracket 12. Since the lower bracket 12 is relatively close to the oil pump 15 and can obtain lubricating oil more quickly, the bearing lubrication assembly may not be provided. Of course, in order to further improve the reliability of lubrication, the bearing lubrication assembly can also be provided on the lower bracket 12 at the same time.

[0071] In the alternative embodiment of the present invention, the filling groove can be opened axially, or the cross-section of the filling groove is in other forms than circular and square; the opening method on the bearing can also be changed, or a segmented bearing can be used; or the spring piece can be changed to other elastic structures such as a spring.

[0072] The exemplary embodiments of the present disclosure have been specifically shown and described above. It should be understood that the present disclosure is not limited to the detailed structures, setting methods or implementation methods described herein; on the contrary, the present disclosure is intended to cover various modifications and equivalent settings included within the spirit and scope of the appended claims.

Claims

1. A bearing lubrication assembly, characterized in that, it includes: a bearing housing, with a filling groove provided on the inner peripheral wall of the bearing housing; an oil absorption structure, arranged in the filling groove, for adsorbing lubricating oil, and capable of expanding in volume after adsorbing the lubricating oil, and capable of releasing the lubricating oil when being compressed; a bearing, arranged in the bearing housing, with an oil passage hole provided on the bearing, and the bearing can extrude the oil absorption structure to make the oil absorption structure release the lubricating oil and flow into the dynamic and static joint part inside the bearing through the oil passage hole; a rotating shaft, rotatably penetrating through the bearing; a spring piece, including a mounting part and an elastic part, the mounting part is located in the filling groove, the spring piece is arranged on the outer side of the oil absorption structure, the elastic part can extrude the oil absorption structure, and the bearing is provided with the oil passage hole at least at a position corresponding to the filling groove, the elastic part can pass through the oil passage hole and abut against the rotating shaft; a cut surface is formed on the side wall of the rotating shaft, and the elastic part can abut against the cut surface, and when the rotating shaft rotates, the elastic part can periodically contact with the cut surface.

2. The bearing lubrication assembly according to claim 1, characterized in that, the filling groove is an annular groove formed by extending circumferentially along the inner peripheral wall of the bearing housing; at least one filling groove is distributed radially along the bearing housing.

3. The bearing lubrication assembly according to claim 2, characterized in that, a plurality of the oil passage holes are evenly distributed on the side wall of the bearing.

4. The bearing lubrication assembly according to claim 1, characterized in that, the mounting part and the elastic part are integrally formed, and an included angle is formed between the mounting part and the elastic part, the mounting part is used for fixedly connecting to the side wall of the filling groove.

5. The bearing lubrication assembly according to claim 1, characterized in that, the cut surface is a surface formed on the mating part of the rotating shaft and the bearing and having the same axial dimension as the bearing, or, the cut surface is the bottom wall surface of the groove formed on the mating part of the rotating shaft and the bearing.

6. The bearing lubrication assembly according to claim 5, characterized in that, the cut surface is a plane, or the cut surface is an arc surface formed along the circumferential direction of the rotating shaft.

7. The bearing lubrication assembly according to any one of claims 1 - 6, characterized in that, one or more spring pieces are arranged circumferentially along the filling groove, each spring piece corresponds to one oil passage hole.

8. A compressor, characterized in that, it includes the bearing lubrication assembly according to any one of claims 1 - 7.

9. The compressor according to claim 8, characterized in that, the rotating shaft constitutes the crankshaft of the compressor.

10. The compressor according to claim 9, characterized in that, a central oil hole is formed axially inside the crankshaft, and a radial oil hole communicating with the central oil hole is provided at the part where the crankshaft mates with the bearing, and the lubricating oil can flow to between the crankshaft and the bearing through the central oil hole and the radial oil hole.

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