Rotor core, rotor and compressor

Abstract

A rotor iron core disclosed by the present invention comprises an iron core body, a central cavity is formed in the iron core body, the central cavity comprises a counter bore end at the upper part and a small hole end at the lower part, an oil blocking end is arranged between the counter bore end and the small hole end, the inner diameters of the counter bore end and the small hole end are both smaller than the inner diameter of the oil blocking end, and an oil blocking end upper end surface is formed between the counter bore end and the oil blocking end. A small hole end upper end face is formed between the oil blocking end and the small hole end, and a plurality of oil leakage holes communicating the oil blocking end to the bottom of the iron core body are formed in the small hole end upper end face. The oil blocking end is additionally arranged between the counter bore end and the small hole end, and the inner diameter of the oil blocking end is slightly larger than that of the counter bore. Meanwhile, a group of oil leakage holes are additionally formed in the small hole end, so that in the operation process of the refrigerator compressor, part of refrigerating machine oil can be blocked by the upper end face of the oil blocking end, flows back downwards along the inner wall of the oil blocking end, leaks to the lower shell part of the compressor through the oil leakage holes in the small hole end and participates in recycling again; therefore, the effects of improving the lubricating effect and reducing friction power consumption are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor rotors, and in particular to a rotor core, a rotor and a compressor. Background Art

[0002] The rotor core is part of the motor's magnetic circuit and an important component of the refrigerator compressor motor structure. It mainly provides a magnetic circuit, enhances the magnetic field strength, and supports the rotor winding. It not only realizes the compression of the gas and transmits power, but also ensures the stable operation and efficient refrigeration of the refrigerator compressor.

[0003] At present, the refrigerator compressors on the market have rotors equipped with traditional rotor cores including a central cavity, which is generally composed of a traditional countersunk hole and a traditional small hole. The inner diameter of the traditional countersunk hole is larger than the inner diameter of the traditional small hole.

[0004] However, in the conventional rotor of the prior art, during the operation of the compressor, part of the refrigeration oil will be thrown onto the side wall of the conventional countersunk hole due to centrifugal action, and finally stored on the upper end surface of the conventional small hole, and will not be recycled, resulting in a reduction in the overall amount of oil in the cycle, thereby affecting the lubrication of the running parts and increasing friction power consumption; at the same time, the amount of cooling oil is reduced and the internal temperature increases. All of these will further lead to a decline in the overall performance of the compressor. Summary of the invention

[0005] In view of the above technical problems in the related art, the present invention proposes a rotor core, a rotor and a compressor, which can overcome the above deficiencies in the prior art.

[0006] To achieve the above technical objectives, the technical solution of the present invention is implemented as follows: In a first aspect, the present invention provides a rotor core; The rotor core comprises a core body, a central cavity is formed in the core body, the central cavity comprises an upper countersunk end and a lower small hole end, an oil-blocking end is arranged between the countersunk end and the small hole end, the inner diameters of the countersunk end and the small hole end are both smaller than the inner diameter of the oil-blocking end, an oil-blocking end upper end face is formed between the countersunk end and the oil-blocking end, an upper end face of the small hole end is formed between the oil-blocking end and the small hole end, and a plurality of oil leakage holes are arranged on the upper end face of the small hole end, connecting the oil-blocking end to the bottom of the core body.

[0007] Furthermore, the inner diameter of the counterbore end is larger than the inner diameter of the small hole end.

[0008] Furthermore, a plurality of the oil leakage holes are evenly distributed on the upper end surface of the small hole end, and the outer wall of the oil leakage hole coincides with the intersection of the upper end surface of the small hole end and the inner wall of the oil blocking end.

[0009] Furthermore, the outer wall of the oil leakage hole has a consistent curvature with the inner wall of the oil blocking end.

[0010] Furthermore, the height dimension of the oil-blocking end is greater than or equal to the height dimension of the small hole end.

[0011] Furthermore, the sum of the height dimensions of the oil-blocking end and the small hole end is less than or equal to the height dimension of the counterbore end.

[0012] Furthermore, the width of the oil leakage hole is greater than or equal to the width of the upper end surface of the oil blocking end.

[0013] In a second aspect, the present invention provides a rotor, comprising an end plate and a rotor core as described above; In a third aspect, the present invention provides a compressor, wherein the compressor is provided with a rotor as described above; The beneficial effects of the present invention are as follows: through the technical solution of the product of the present invention, an oil baffle end is added between the countersunk end and the small hole end, and the inner diameter of the oil baffle end is slightly larger than the inner diameter of the countersunk hole; at the same time, a group of oil leakage holes are added at the small hole end, so that during the operation of the refrigerator compressor, part of the refrigeration oil will be blocked by the upper end surface of the oil baffle end, flow back downward along the inner wall of the oil baffle end, and leak to the lower shell of the compressor through the oil leakage holes at the small hole end, and participate in the circulation again, thereby achieving the effect of improving the lubrication effect of the running parts, reducing friction power consumption, and improving the overall performance of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 is a cross-sectional view of a rotor core according to an embodiment of the present invention; Figure 2 is a bottom view of a rotor core according to an embodiment of the present invention; Figure 3 is a three-dimensional cross-sectional view of a rotor core according to an embodiment of the present invention; Figure 4 is a stereoscopic diagram of a rotor core according to an embodiment of the present invention; Figure 5 is a partial cross-sectional schematic diagram of a rotor assembly state of a compressor according to an embodiment of the present invention; Figure 6 is a three-dimensional cross-sectional view of a conventional rotor core according to the background technology of the present invention; In the figure: 1. rotor core; 2. countersunk end; 3. oil baffle end; 301. upper end surface of oil baffle end; 4. small hole end; 401. upper end surface of small hole end; 5. oil leakage hole; 6. cylinder seat; 7. crankshaft; 8. traditional core; 9. traditional countersunk hole; 10. traditional small hole. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0017] It should be understood that, in the description of the embodiments of the present invention, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0018] like Figure 1-5 As shown, a rotor core according to an embodiment of the present invention includes a core body, a central cavity is formed in the core body, the central cavity includes an upper countersunk end 2 and a lower small hole end 4, an oil stop end 3 is provided between the countersunk end 2 and the small hole end 4, the inner diameters of the countersunk end 2 and the small hole end 4 are both smaller than the inner diameter of the oil stop end 3, an oil stop end upper end face 301 is formed between the countersunk end 2 and the oil stop end 3, a small hole end upper end face 401 is formed between the oil stop end 3 and the small hole end 4, and a plurality of oil leakage holes 5 connecting the oil stop end 3 to the bottom of the core body are provided on the small hole end upper end face 401.

[0019] According to a rotor core described in an embodiment of the present invention, in a specific embodiment, the inner diameter of the countersunk end 2 is larger than the inner diameter of the small hole end 4 .

[0020] According to a rotor core described in an embodiment of the present invention, in a specific embodiment, a plurality of the oil leakage holes 5 are evenly distributed on the upper end surface 401 of the small hole end, and the outer wall of the oil leakage hole 5 coincides with the intersection of the upper end surface 401 of the small hole end and the inner wall of the oil blocking end 3.

[0021] According to a rotor core described in an embodiment of the present invention, in a specific embodiment, the outer wall of the oil leakage hole 5 has a consistent curvature with the inner wall of the oil blocking end 3 .

[0022] According to a rotor core described in an embodiment of the present invention, in a specific embodiment, the height dimension of the oil-blocking end 3 is greater than or equal to the height dimension of the small hole end 4 .

[0023] According to a rotor core described in an embodiment of the present invention, in a specific embodiment, the sum of the height dimensions of the oil retaining end 3 and the small hole end 4 is less than or equal to the height dimension of the counterbore end 2 .

[0024] According to a rotor core described in an embodiment of the present invention, in a specific embodiment, the width dimension of the oil leakage hole 5 is greater than or equal to the width dimension of the upper end surface 301 of the oil blocking end.

[0025] In another aspect, the present invention provides a rotor, comprising an end plate and a rotor core as described above; In another aspect, the present invention further provides a compressor, wherein the compressor is provided with a rotor as described above; In order to facilitate understanding of the above technical solutions of the present invention, the above technical solutions of the present invention are described in detail below through specific usage methods.

[0026] In specific use, according to a rotor core described in the present invention, during the operation of the compressor, part of the refrigeration oil will be thrown onto the side walls of the countersunk end 2 and the oil retaining end 3 due to centrifugal action, and part of the refrigeration oil will be blocked by the upper end surface 301 of the oil retaining end, and then flow back down along the side wall of the oil retaining end 3, and leak to the lower shell of the compressor through several oil leakage holes on the upper end surface 401 of the small hole end, and enter the recycling state again. This solves the technical problem that part of the refrigeration oil in the prior art cannot be recycled, resulting in a reduction in the overall amount of refrigeration oil in the cycle, thereby affecting the lubrication of the running parts and increasing friction power consumption; and the reduction in the amount of cooling oil also further leads to an increase in the internal temperature.

[0027] To sum up, with the help of the above-mentioned technical scheme of the present invention, through the technical scheme of the product of the present invention, an oil baffle end is added between the countersunk end and the small hole end, and the inner diameter of the oil baffle end is slightly larger than the inner diameter of the countersunk hole; at the same time, a group of oil leakage holes are added at the small hole end, so that during the operation of the refrigerator compressor, part of the refrigeration oil will be blocked by the upper end surface of the oil baffle end, flow back downward along the inner wall of the oil baffle end, and leak to the lower shell of the compressor through the oil leakage holes at the small hole end, and re-participate in the circulation, thereby achieving the effect of improving the lubrication effect of the running parts, reducing friction power consumption, and improving the overall performance of the compressor.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotor core, characterized in that: The invention comprises an iron core body, wherein a central cavity is formed in the iron core body, wherein the central cavity comprises an upper countersunk hole end (2) and a lower small hole end (4), an oil-blocking end (3) is provided between the countersunk hole end (2) and the small hole end (4), the inner diameters of the countersunk hole end (2) and the small hole end (4) are both smaller than the inner diameter of the oil-blocking end (3), an oil-blocking end upper end surface (301) is formed between the countersunk hole end (2) and the oil-blocking end (3), a small hole end upper end surface (401) is formed between the oil-blocking end (3) and the small hole end (4), and a plurality of oil leakage holes (5) are provided on the small hole end upper end surface (401) which connect the oil-blocking end (3) to the bottom of the iron core body.

2. A rotor core according to claim 1, characterized in that: The inner diameter of the counterbore end (2) is greater than the inner diameter of the small hole end (4).

3. A rotor core according to claim 1, characterized in that: A plurality of the oil leakage holes (5) are evenly distributed on the upper end surface (401) of the small hole end, and the outer wall of the oil leakage hole (5) coincides with the intersection of the upper end surface (401) of the small hole end and the inner wall of the oil blocking end (3).

4. A rotor core according to claim 1, characterized in that: The outer wall of the oil leakage hole (5) has the same curvature as the inner wall of the oil blocking end (3).

5. The rotor core according to claim 1, characterized in that: The height dimension of the oil blocking end (3) is greater than or equal to the height dimension of the small hole end (4).

6. A rotor core according to claim 1, characterized in that: The sum of the height dimensions of the oil-blocking end (3) and the small hole end (4) is less than or equal to the height dimension of the counterbore end (2).

7. A rotor core according to claim 1, characterized in that: The width of the oil leakage hole (5) is greater than or equal to the width of the upper end surface (301) of the oil blocking end.

8. A rotor, characterized in that: The invention comprises an end plate and a rotor core according to any one of claims 1 to 7.

9. A compressor, characterized in that: The compressor comprises a rotor as claimed in claim 8 disposed therein.

Images