Pump body structure, compressor and air conditioner

Abstract

The application provides a pump body structure, a compressor and an air conditioner. The pump body structure comprises a crankshaft (1) and a roller (3), the crankshaft (1) comprises an eccentric part (2), the roller (3) is sleeved outside the eccentric part (2), and a weight-reducing cavity (4) with an opening facing the inner circumferential wall of the roller (3) is arranged on the outer circumferential wall of the eccentric part (2); and / or a weight-reducing cavity (4) with an opening facing the outer circumferential wall of the eccentric part (2) is arranged on the inner circumferential wall of the roller (3). According to the pump body structure, the overall weight of the crankshaft can be reduced, the balance of the crankshaft is improved, and the friction loss is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to a pump body structure, a compressor and an air conditioner. BACKGROUND

[0002] In the related art, a compressor is disclosed, which comprises a crankshaft, and the crankshaft comprises an eccentric part, and a roller is arranged outside the eccentric part. During the operation of the compressor, due to the eccentric arrangement of the crankshaft roller, the force is unbalanced when the crankshaft rotates, even if there is the effect of a balance block, the force and torque of each force point of the crankshaft cannot be completely balanced, thereby increasing the vibration of the compressor; at the same time, due to the unbalanced effect of the crankshaft, the friction power consumption between each friction pair of the pump body is increased, in addition, the weight of the eccentric part of the crankshaft and the roller is relatively large, which also increases the friction power consumption. SUMMARY

[0003] Therefore, the technical problem to be solved by the present application is to provide a pump body structure, a compressor and an air conditioner, which can reduce the overall weight of the crankshaft, improve the balance of the crankshaft and reduce the friction loss.

[0004] In order to solve the above problems, the present application provides a pump body structure, comprising a crankshaft and a roller, the crankshaft comprises an eccentric part, the roller is sleeved outside the eccentric part, a weight-reducing cavity with an opening facing the inner circumferential wall of the roller is formed on the outer circumferential wall of the eccentric part; and / or, a weight-reducing cavity with an opening facing the outer circumferential wall of the eccentric part is formed on the inner circumferential wall of the roller.

[0005] Preferably, the weight-reducing cavity is formed on the outer circumferential wall of the eccentric part, the roller is cylindrical, and the inner circumferential wall of the roller is sealingly matched with the outer circumferential wall of the eccentric part to close the weight-reducing cavity into a sealed cavity.

[0006] Preferably, the weight-reducing cavity is formed on the inner circumferential wall of the roller, the eccentric part is cylindrical, and the inner circumferential wall of the roller is sealingly matched with the outer circumferential wall of the eccentric part to close the weight-reducing cavity into a sealed cavity.

[0007] Preferably, the weight-reducing cavities are respectively formed on the outer circumferential wall of the eccentric part and the inner circumferential wall of the roller, the weight-reducing cavities on the eccentric part and the roller are correspondingly arranged, and the inner circumferential wall of the roller is sealingly matched with the outer circumferential wall of the eccentric part to close the weight-reducing cavities into sealed cavities.

[0008] Preferably, the weight-reducing cavities on the eccentric part are located on the eccentric side of the eccentric part, the weight-reducing cavities on the roller are annular grooves, and the weight-reducing cavities on the eccentric part and the roller are matched to form an annular sealed cavity.

[0009] Preferably, when the weight-reducing cavities are arranged on the eccentric part, the wall thickness of the weight-reducing cavities on the two sides in the axial direction is greater than or equal to 2mm; and / or, when the weight-reducing cavities are arranged on the roller, the thickness of the thinnest position of the roller is greater than or equal to 2mm.

[0010] Preferably, the upper and lower end faces of the eccentric part are planes, or at least one of the upper and lower end faces of the eccentric part is provided with a step, the step height being less than or equal to 1 mm.

[0011] Preferably, the lower end face of the eccentric part is provided with a thrust surface, and the thrust surface and the lower end face form a step, the step height being less than or equal to 0.5mm.

[0012] Preferably, the crankshaft further includes a main shaft, with the eccentric portion being eccentrically positioned relative to the main shaft.

[0013] Preferably, a weight-reducing cavity is provided on the outer peripheral wall of the eccentric part, and the inner wall surface of the weight-reducing cavity near the main shaft is an arc surface with the central axis of the main shaft as the axis of rotation.

[0014] Preferably, a weight-reducing cavity is provided on the outer peripheral wall of the eccentric part, and the intermediate shaft segment corresponding to the weight-reducing cavity is formed by the intersection of a first cylinder and a second cylinder. The first cylinder is coaxial with the eccentric part, and the second cylinder is coaxial with the main shaft.

[0015] Preferably, the diameter of the first cylinder is DA, the diameter of the eccentric part is Deccentric, and 0 < Deccentric - DA ≤ 0.5 mm.

[0016] Preferably, the intermediate shaft section has a rounded transition with the upper and lower sidewalls of the corresponding weight-reducing cavity.

[0017] Preferably, the upper sidewall of the weight-reducing cavity is provided with an oil passage hole that connects the weight-reducing cavity and the upper space of the eccentric part; and / or, the lower sidewall of the weight-reducing cavity is provided with an oil passage hole that connects the weight-reducing cavity and the lower space of the eccentric part.

[0018] Preferably, the oil passage extends obliquely away from the central axis of the main shaft along the direction from the weight reduction cavity to the upper end face of the eccentric part; and / or, along the direction from the weight reduction cavity to the lower end face of the eccentric part, the oil passage extends obliquely away from the central axis of the main shaft.

[0019] According to another aspect of this application, a compressor is provided, including a pump body structure, which is the pump body structure described above.

[0020] According to another aspect of this application, an air conditioner is provided, including a pump body structure, which is the pump body structure described above.

[0021] The pump body structure provided by the application comprises a crankshaft and a roller, the crankshaft comprises an eccentric part, the roller is sleeved outside the eccentric part, a weight-reducing cavity with an opening facing the inner circumferential wall of the roller is formed in the outer circumferential wall of the eccentric part; and / or a weight-reducing cavity with an opening facing the outer circumferential wall of the eccentric part is formed in the inner circumferential wall of the roller. The pump body structure sets the weight-reducing cavity in the outer circumferential wall of the eccentric part and / or the inner circumferential wall of the roller, and realizes the sealing of the weight-reducing cavity by the sealing cooperation of the eccentric part and the roller. Since the weight-reducing cavity is arranged in the exposed area of the eccentric part and / or the roller, the structure is simple, the processing is convenient, the cost is low, the weight reduction of the eccentric part and / or the roller can be realized in a simpler way, the power consumption of the compressor is reduced, the balance effect of the crankshaft is improved, the energy efficiency of the compressor is effectively improved, and the vibration problem of the compressor caused by the unbalanced stress of the crankshaft is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A sectional view structure schematic diagram of the crankshaft and the roller cooperation of an embodiment of the application;

[0023] Figure 2 A three-dimensional structure schematic diagram of the crankshaft of an embodiment of the application;

[0024] Figure 3 A structure schematic diagram of the crankshaft of an embodiment of the application;

[0025] Figure 4 A structure schematic diagram of the crankshaft of an embodiment of the application;

[0026] Figure 5 A structure schematic diagram of the crankshaft of an embodiment of the application;

[0027] Figure 6 A three-dimensional structure schematic diagram of the crankshaft of an embodiment of the application.

[0028] The signs of the reference numerals are as follows:

[0029] 1, crankshaft; 2, eccentric part; 3, roller; 4, weight-reducing cavity; 5, thrust face; 6, main shaft; 7, oil hole. DETAILED DESCRIPTION

[0030] For reference Figures 1 to 6 As shown in the figure, according to the embodiment of the application, the pump body structure comprises a crankshaft 1 and a roller 3, the crankshaft 1 comprises an eccentric part 2, the roller 3 is sleeved outside the eccentric part 2, a weight-reducing cavity 4 with an opening facing the inner circumferential wall of the roller 3 is formed in the outer circumferential wall of the eccentric part 2; and / or a weight-reducing cavity 4 with an opening facing the outer circumferential wall of the eccentric part 2 is formed in the inner circumferential wall of the roller 3.

[0031] The pump body structure sets the weight reduction cavity 4 on the outer peripheral wall of the eccentric part 2 and / or the inner peripheral wall of the roller 3, and realizes the sealing of the weight reduction cavity 4 by the sealing fit of the eccentric part 2 and the roller 3. Since the weight reduction cavity 4 is arranged on the exposed area of the eccentric part 2 and / or the roller 3, the weight reduction cavity 4 can be directly machined on the eccentric part 2 and / or the roller 3, and the quality of the eccentric part 2 and / or the roller 3 after machining the weight reduction cavity 4 can be more effectively ensured, so that the structure is simple, the machining is convenient, the cost is low, the weight reduction of the eccentric part and / or the roller can be realized by a simpler way, the power consumption of the compressor is reduced, the balance effect of the crankshaft is improved, the compressor efficiency is effectively improved, and the vibration problem of the compressor caused by the unbalanced stress of the crankshaft is improved.

[0032] By arranging the weight reduction cavity 4 on the outer peripheral wall of the eccentric part 2 and / or the inner peripheral wall of the roller 3, the structural strength of the crankshaft and the roller can be ensured, the rotating weight of the eccentric structure can be effectively reduced, and the lubricating oil can be better stored by the weight reduction cavity 4, so that the power consumption and vibration of the compressor are reduced.

[0033] In the embodiment, in order to further improve the structural balance of the eccentric part 2 and the roller 3 in machining the weight reduction cavity 4, the weight reduction cavity 4 can be arranged at the axial middle part of the eccentric part 2 and / or the roller 3.

[0034] In one embodiment, the weight reduction cavity 4 is arranged on the outer peripheral wall of the eccentric part 2, the roller 3 is in a cylindrical shape, and the inner peripheral wall of the roller 3 is sealingly fitted with the outer peripheral wall of the eccentric part 2 to close the weight reduction cavity 4 into a sealed cavity. In the embodiment, the weight reduction cavity 4 can be arranged only on the eccentric part 2, and the roller 3 remains in a cylindrical structure, which can reduce the machining cost of the roller 3, ensure the structural strength of the roller 3, realize the weight reduction treatment of the eccentric part 2 of the crankshaft, and improve the balance of the crankshaft rotation.

[0035] In one embodiment, the weight reduction cavity 4 is arranged on the inner peripheral wall of the roller 3, the eccentric part 2 is in a cylindrical shape, and the inner peripheral wall of the roller 3 is sealingly fitted with the outer peripheral wall of the eccentric part 2 to close the weight reduction cavity 4 into a sealed cavity. In the embodiment, the weight reduction cavity 4 can be arranged only on the roller 3, and the eccentric part 2 remains in a cylindrical structure, which can reduce the machining cost of the eccentric part 2, realize the weight reduction treatment of the roller 3, and improve the balance of the crankshaft rotation.

[0036] In one embodiment, the weight reduction cavity 4 is arranged on the outer peripheral wall of the eccentric part 2 and the inner peripheral wall of the roller 3, respectively, the weight reduction cavity 4 on the eccentric part 2 is arranged correspondingly to the weight reduction cavity 4 on the roller 3, and the inner peripheral wall of the roller 3 is sealingly fitted with the outer peripheral wall of the eccentric part 2 to close the weight reduction cavity 4 into a sealed cavity.

[0037] In the embodiment, the weight reduction cavities 4 are arranged on the eccentric part 2 and the roller 3 simultaneously, which can make the design of the weight reduction cavities 4 more flexible, and the volume of the weight reduction cavities 4 on the eccentric part 2 and the roller 3 can be adjusted as needed, so that the distribution of the weight reduction cavities 4 on the eccentric part 2 and the roller 3 is more reasonable, and the structural design of the eccentric rotating structure formed by the crankshaft 1 and the roller 3 can be optimized to maximize the balance during the rotation of the crankshaft 1 and the roller, while the structural strength of the eccentric part 2 and the roller 3 will not be greatly affected due to the volume requirement of the weight reduction cavities 4.

[0038] In one embodiment, the weight reduction cavity 4 on the eccentric part 2 is located on the eccentric side of the eccentric part 2, the weight reduction cavity 4 on the roller 3 is an annular groove, and the weight reduction cavity 4 on the eccentric part 2 cooperates with the weight reduction cavity 4 on the roller 3 to form an annular sealing cavity. In the embodiment, the main shaft 6 of the crankshaft 1 is provided with a central oil hole, and the side away from the eccentric of the eccentric part 2 is provided with a lateral oil hole. The lubricating oil in the central oil hole can enter the annular weight reduction cavity 4 on the roller 3 through the lateral oil hole, then enter the weight reduction cavity 4 formed by the roller 3 and the eccentric part 2 through the annular weight reduction cavity 4 on the roller 3, and can be stored in the weight reduction cavity 4 on the eccentric side of the eccentric part 2 and the weight reduction cavity 4 on the roller 3 on that side.

[0039] In one embodiment, when the weight reduction cavity 4 is arranged on the eccentric part 2, the wall thickness of the weight reduction cavity 4 on the two sides in the axial direction is greater than or equal to 2mm. In order to reduce the weight of the eccentric part 2 as much as possible, the thickness of the two sides should be as small as possible, but if it is too small, the structural strength cannot be guaranteed; therefore, when the thickness of the two sides is greater than or equal to 2mm, the structural strength can be guaranteed.

[0040] In one embodiment, when the weight reduction cavity 4 is arranged on the roller 3, the thickness of the thinnest position of the roller 3 is greater than or equal to 2mm, so that after the weight reduction cavity 4 is arranged, the roller 3 still has sufficient structural strength.

[0041] In one embodiment, the upper and lower end faces of the eccentric part 2 are flat, or at least one of the upper and lower end faces of the eccentric part 2 is provided with a step, and the height of the step is less than or equal to 1mm. Generally, in order to hollow the middle part for processing, the remaining thickness on both sides will be relatively small, so the large step structure of the original upper and lower end faces of the crankshaft is cancelled to facilitate structural design. At this time, the upper and lower end faces of the eccentric part 2 can be flat or can be provided with a small step structure, i.e. the height of the step is less than or equal to 1mm, so that the gap between the upper and lower end faces of the eccentric part and the flange or partition plate is small enough to be effectively sealed by the lubricating oil, effectively avoiding the problem of refrigerant leakage.

[0042] In one embodiment, the lower end face of the eccentric portion 2 is provided with a thrust surface 5, and the thrust surface 5 and the lower end face form a step, the step height being less than or equal to 0.5 mm. By setting the lower end face of the eccentric portion 2 as a stepped structure, the thrust surface 5 can be used to support the eccentric portion 2, while reducing the contact area between the lower end face of the eccentric portion 2 and the supporting structure, such as the lower flange, thereby effectively reducing frictional power consumption.

[0043] In one embodiment, the crankshaft 1 further includes a main shaft 6, with the eccentric portion 2 eccentrically disposed relative to the main shaft 6.

[0044] In one embodiment, a weight-reducing cavity 4 is provided on the outer peripheral wall of the eccentric part 2. The inner wall surface of the weight-reducing cavity 4 near the spindle 6 is an arc surface with the central axis of the spindle 6 as the axis of rotation. This allows the clamping position of the spindle 6 to be changed without changing it when machining the weight-reducing cavity 4, thereby reducing machining steps, lowering machining costs, and improving machining efficiency.

[0045] In one embodiment, a weight-reducing cavity 4 is formed on the outer peripheral wall of the eccentric portion 2. The intermediate shaft segment corresponding to the weight-reducing cavity 4 is formed by the intersection of a first cylinder and a second cylinder. The first cylinder is coaxial with the eccentric portion 2, and the second cylinder is coaxial with the main shaft 6. (See also...) Figure 4 As shown, in this embodiment, the weight reduction cavity 4 is coaxial with the major and minor axes of the crankshaft 1, wherein A and C are concentrically arranged, and B, D, and E are concentrically arranged; the coaxial arrangement can make it easier to process the parts without multiple clamping operations, and also facilitates structural design.

[0046] In one embodiment, the diameter of the first cylinder is DA, and the diameter of the eccentric part 2 is Deccentric, where 0 < Deccentric - DA ≤ 0.5 mm. This arrangement allows the lubricating oil in the lateral oil hole to smoothly pass through the gap between the roller 3 and the eccentric part 2 into the weight-reducing cavity 4 at the eccentric position, providing lubrication for the friction between the eccentric part 2 and the roller 3 of the crankshaft 1 and reducing the power consumption of the compressor.

[0047] In one embodiment, the intermediate shaft section and the upper and lower sidewalls of the weight-reducing cavity 4 have a rounded transition. (See also...) Figure 4 As shown, the rounded corner transition can strengthen the structure on both sides of the weight-reducing cavity 4. On the other hand, since the rounded corner is set close to the center of the crankshaft, its centrifugal force calculation formula is: F=m×r×w 2 Where m is the mass of the rotating object, r is the distance of the rotating object from the center, and w is the angular velocity of rotation. A smaller r results in a smaller centrifugal force and a smaller unbalanced force, thus allowing for a significant increase in the structural strength of the eccentric part 2 by utilizing a smaller harmful effect.

[0048] In one embodiment, the upper side wall of the weight-reducing cavity 4 is provided with an oil passage hole 7 communicating the weight-reducing cavity 4 and the upper side space of the eccentric portion 2; and / or, the lower side wall of the weight-reducing cavity 4 is provided with an oil passage hole 7 communicating the weight-reducing cavity 4 and the lower side space of the eccentric portion 2.

[0049] In one embodiment, the oil passage hole 7 extends obliquely away from the central axis of the main shaft 6 along the direction from the weight-reducing cavity 4 to the upper end surface of the eccentric portion 2; and / or, the oil passage hole 7 extends obliquely away from the central axis of the main shaft 6 along the direction from the weight-reducing cavity 4 to the lower end surface of the eccentric portion 2.

[0050] The eccentric portion 2 of the crankshaft 1 is provided with the oil passage hole 7 between the upper end surface and the weight-reducing cavity 4 or between the lower end surface and the weight-reducing cavity 4, and the delivery path of the lubricating oil is: the refrigeration oil in the oil pool enters the crankshaft 1 from the central oil hole of the crankshaft 1, comes out from the lateral oil hole provided in the eccentric portion 2 of the crankshaft 1, enters the weight-reducing cavity 4 of the eccentric portion 2 and the roller 3, and then enters the upper and lower end surfaces of the crankshaft 1 from the weight-reducing cavity 4 through the oil passage hole 7, thereby increasing the lubricating effect of the pump body.

[0051] The oil passage hole 7 is obliquely arranged and away from the rotation axis of the crankshaft 1 along the direction from the weight-reducing cavity 4 to the end surface of the eccentric portion 2, so that the lubricating oil can more smoothly enter the upper and lower end surfaces of the crankshaft 1 under the action of centrifugal force when the crankshaft 1 is working, thereby lubricating the cooperation at the positions of the upper and lower end surfaces.

[0052] According to the embodiments of the present application, the compressor comprises the pump body structure.

[0053] The compressor described above is, for example, a rolling rotor type compressor, a swing rotor type or a sliding vane type compressor, etc.

[0054] According to the embodiments of the present application, the air conditioner comprises the pump body structure.

[0055] It is easy for those skilled in the art to understand that the above-mentioned advantageous modes can be freely combined and superimposed without conflict.

[0056] The above merely describes the preferred embodiments of the present application and should not be used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application. The above merely describes the preferred embodiments of the present application and should not be used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pump body structure, characterized by, The crankshaft (1) includes a crankshaft (1) and a roller (3). The crankshaft (1) includes an eccentric portion (2). The roller (3) is sleeved on the outside of the eccentric portion (2). A weight-reducing cavity (4) with an opening facing the inner peripheral wall of the roller (3) is provided on the outer peripheral wall of the eccentric portion (2). And / or, a weight-reducing cavity (4) with an opening facing the outer peripheral wall of the eccentric portion (2) is provided on the inner peripheral wall of the roller (3). The upper side wall of the weight reduction cavity (4) is provided with an oil passage hole (7) that connects the weight reduction cavity (4) and the upper space of the eccentric part (2); the lower side wall of the weight reduction cavity (4) is provided with an oil passage hole (7) that connects the weight reduction cavity (4) and the lower space of the eccentric part (2). The crankshaft (1) also includes a main shaft (6), and the eccentric portion (2) is eccentrically disposed relative to the main shaft (6); Along the direction from the weight-reducing cavity (4) to the upper end face of the eccentric part (2), the oil passage (7) extends obliquely in a direction away from the central axis of the main shaft (6); and / or, along the direction from the weight-reducing cavity (4) to the lower end face of the eccentric part (2), the oil passage (7) extends obliquely in a direction away from the central axis of the main shaft (6); The weight-reducing cavity (4) is provided on the outer peripheral wall of the eccentric part (2). The intermediate shaft segment corresponding to the weight-reducing cavity (4) is formed by the intersection of the first cylinder and the second cylinder. The first cylinder is coaxial with the eccentric part (2), and the second cylinder is coaxial with the main shaft (6). The diameter of the first cylinder is DA, and the diameter of the eccentric part (2) is Deccentric, where 0 < Deccentric - DA ≤ 0.5 mm.

2. The pump body structure according to claim 1, characterized by The weight-reducing cavity (4) is provided on the outer peripheral wall of the eccentric part (2). The roller (3) is cylindrical. The inner peripheral wall of the roller (3) and the outer peripheral wall of the eccentric part (2) are sealed together to enclose the weight-reducing cavity (4) into a sealed cavity.

3. The pump body structure of claim 1, wherein The inner peripheral wall of the roller (3) is provided with the weight-reducing cavity (4), the eccentric part (2) is cylindrical, and the inner peripheral wall of the roller (3) and the outer peripheral wall of the eccentric part (2) are sealed together to enclose the weight-reducing cavity (4) into a sealed cavity.

4. The pump body structure of claim 1, wherein The outer peripheral wall of the eccentric part (2) and the inner peripheral wall of the roller (3) are respectively provided with the weight reduction cavity (4). The weight reduction cavity (4) on the eccentric part (2) and the weight reduction cavity (4) on the roller (3) are respectively provided. The inner peripheral wall of the roller (3) and the outer peripheral wall of the eccentric part (2) are sealed together to enclose the weight reduction cavity (4) into a sealed cavity.

5. The pump body structure of claim 4, wherein The weight-reducing cavity (4) on the eccentric part (2) is located on the eccentric side of the eccentric part (2). The weight-reducing cavity (4) on the roller (3) is an annular groove. The weight-reducing cavity (4) on the eccentric part (2) and the weight-reducing cavity (4) on the roller (3) cooperate to form an annular sealed cavity.

6. The pump body structure of claim 1, wherein When the eccentric part (2) is provided with the weight-reducing cavity (4), the wall thickness of the weight-reducing cavity (4) on both axial sides is greater than or equal to 2 mm; and / or, when the roller (3) is provided with the weight-reducing cavity (4), the thickness of the thinnest position of the roller (3) is greater than or equal to 2 mm.

7. The pump body structure of claim 1, wherein The upper and lower end faces of the eccentric part (2) are flat, or at least one of the upper and lower end faces of the eccentric part (2) is provided with a step, and the step height is less than or equal to 1 mm.

8. The pump body structure of claim 1, wherein The lower end face of the eccentric part (2) is provided with a thrust face (5), and the thrust face (5) forms a step with the lower end face, and the step height is less than or equal to 0.5 mm.

9. The pump body structure of claim 1, wherein The outer peripheral wall of the eccentric part (2) is provided with the weight-reducing cavity (4), and the inner wall face of the weight-reducing cavity (4) close to the main shaft (6) is an arc surface with the center axis of the main shaft (6) as the rotation axis.

10. The pump body structure of claim 1, wherein The intermediate shaft section and the upper and lower two side walls of the weight-reducing cavity (4) are circularly transitioned.

11. A compressor comprising a pump body structure, characterized by, The pump body structure is the pump body structure according to any one of claims 1 to 10.

12. An air conditioner comprising a pump body structure, characterized by, The pump body structure is the pump body structure according to any one of claims 1 to 10.

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