Roller, pump body assembly, compressor

Abstract

The present invention provides a roller, a pump body assembly, and a compressor. The roller includes a first roller cylinder section and a second roller cylinder section arranged in sequence along the axial direction of the roller. The thermal expansion deformation amount of the second roller cylinder section is less than that of the first roller cylinder section. According to the present invention, the roller is formed by the second roller cylinder section with a smaller thermal expansion deformation amount and the first roller cylinder section with a relatively larger thermal expansion deformation amount, rather than being entirely made of a material with a single thermal expansion deformation amount. This can reduce the overall axial deformation amount of the roller, effectively reduce the abnormal wear and noise caused by the contact between the roller and the upper and lower flanges after thermal expansion, thereby improving the compressor efficiency and the overall energy efficiency of the machine.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressor manufacturing, and particularly relates to a roller, a pump body assembly, and a compressor. Background Art

[0002] In a common rotary roller compressor, the roller piston is usually of an integral structure. During assembly, it is necessary to measure the height value of each roller one by one and match a suitable height difference. Moreover, at the moment of exhaust during the compression stage of the compressor operation, the temperature is very high. When the roller undergoes thermal expansion, the height increases, resulting in direct close contact with the upper flange. During the high-speed and high-frequency operation stage of the compressor, it is easy to cause abnormal wear, leading to a reduction in the overall efficiency of the machine and the energy efficiency value of the compressor, and usually abnormal noise problems will also occur. Therefore, a reasonable solution needs to be designed to reduce or avoid this abnormal wear. Summary of the Invention

[0003] Therefore, the present invention provides a roller, a pump body assembly, and a compressor, which can overcome the deficiencies in the related art that the roller in the rotary roller compressor expands after being heated and contacts the upper and lower flanges, causing abnormal wear, noise, and reducing the efficiency and energy efficiency of the compressor.

[0004] To solve the above problems, the present invention provides a roller, which includes a first roller cylinder section and a second roller cylinder section arranged in sequence along the axial direction of the roller, wherein the thermal expansion deformation amount of the second roller cylinder section is smaller than that of the first roller cylinder section.

[0005] In some embodiments, the roller further includes a third roller cylinder section, the third roller cylinder section is located on the side of the second roller cylinder section away from the first roller cylinder section, and the thermal expansion deformation amount of the third roller cylinder section is equal to that of the first roller cylinder section.

[0006] In some embodiments, the second roller cylinder section has a first radial plane perpendicular to its axis, and the second roller cylinder section is symmetric about the first radial plane; and / or, the first roller cylinder section and the third roller cylinder section are symmetric about the first radial plane.

[0007] In some embodiments, the first roller cylinder section and the second roller cylinder section are detachably connected, and / or, the third roller cylinder section and the second roller cylinder section are detachably connected.

[0008] In some embodiments, the second roller barrel section includes an inner ring wall and an outer ring wall arranged coaxially. There are a plurality of connecting plates between the inner ring wall and the outer ring wall. A plurality of mounting grooves are formed on the end face of the first roller barrel section facing the second roller barrel section, and the plurality of connecting plates are respectively located in the plurality of mounting grooves one by one, and / or a plurality of mounting grooves are formed on the end face of the third roller barrel section facing the second roller barrel section, and the plurality of connecting plates are respectively located in the plurality of mounting grooves one by one.

[0009] In some embodiments, the plurality of connecting plates are evenly spaced along the circumferential direction of the second roller barrel section.

[0010] In some embodiments, when projected onto a second radial plane perpendicular to the axis of the second roller barrel section, the connecting plate is a fan-shaped ring symmetric about its radial center line. The included angle between the radial center lines of two adjacent connecting plates is C, and the included angle formed between the two straight sides of the fan-shaped ring is D, and D≥C / 12.

[0011] In some embodiments, one end of the outer circumferential wall of the first roller barrel section facing the second roller barrel section has a first L-shaped ring groove, at least part of the outer ring wall is located in the first L-shaped ring groove, and the outer wall surface of the outer ring wall and the outer wall surface of the outer circumferential wall are on the same circumferential surface. One end of the inner circumferential wall of the first roller barrel section facing the second roller barrel section has a second L-shaped ring groove, at least part of the inner ring wall is located in the second L-shaped ring groove, and the inner wall surface of the inner ring wall and the inner wall surface of the inner circumferential wall are on the same circumferential surface.

[0012] In some embodiments, the radial thickness of the outer ring wall is greater than the radial thickness of the inner ring wall; and / or an oil guiding flow channel is formed in the connecting plate, and the oil guiding flow channel can guide lubricating oil from the inner side of the inner ring wall to the mating surface of the outer ring wall with the first roller barrel section and / or the third roller barrel section.

[0013] In some embodiments, the oil guiding flow channel includes a radially extending section extending along the radial direction of the second roller barrel section and an axially extending section extending along the axial direction of the second roller barrel section, wherein the axially extending section is located at one end of the radially extending section away from the axis of the second roller barrel section.

[0014] In some embodiments, the diameter of the outer peripheral wall of the outer ring wall is A, and the diameter of the circle where the center of the axially extending section is located is H4, and H4 = 0.9A.

[0015] In some embodiments, the material density of the second roller barrel section is less than the material densities of the first roller barrel section and the third roller barrel section.

[0016] In some embodiments, the second roller barrel section is made of aluminum alloy material, and the first roller barrel section and the third roller barrel section are made of alloy cast iron material.

[0017] In some embodiments, the outer peripheral wall of the second roller barrel section has a wear-resistant layer.

[0018] In some embodiments, the wear-resistant layer is a DLC metal coating.

[0019] The present invention also provides a pump body assembly, including the above-mentioned roller.

[0020] The present invention also provides a compressor, including the above-mentioned pump body assembly.

[0021] A roller, a pump body assembly, and a compressor provided by the present invention. The roller is formed by a second roller barrel section with a relatively small thermal expansion deformation amount and a first roller barrel section with a relatively large thermal expansion deformation amount, rather than being entirely made of a material with a single thermal expansion deformation amount. It can reduce the overall axial deformation amount of the roller, effectively reduce abnormal wear and noise caused by the contact between the roller and the upper and lower flanges after thermal expansion, thereby improving the efficiency of the compressor and the overall energy efficiency of the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a disassembled structural schematic diagram (three-dimensional) of the roller according to an embodiment of the present invention;

[0023] Figure 2 is an internal structural schematic diagram of the roller after assembly according to an embodiment of the present invention;

[0024] Figure 3 is Figure 1 a three-dimensional structural schematic diagram of the second roller barrel section in

[0025] Figure 4 is Figure 3 a structural schematic diagram of a radial cross-section of the second roller barrel section of

[0026] Figure 5 is Figure 1 a three-dimensional structural schematic diagram of the first roller barrel section or the third roller barrel section in

[0027] The reference numerals are shown as:

[0028] 11. First roller barrel section; 111. First L-shaped ring groove; 112. Second L-shaped ring groove; 12. Second roller barrel section; 121. Inner ring wall; 122. Outer ring wall; 123. Connecting plate; 124. Radial extension section; 125. Axial extension section; 126. Oil inlet; 127. Oil outlet; 13. Third roller barrel section; 14. Installation groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Refer to the following in combination Figures 1 to 5 As shown, according to an embodiment of the present invention, a roller is provided, which includes a first roller barrel section 11 and a second roller barrel section 12 arranged in sequence along the axial direction of the roller. The thermal expansion deformation amount of the second roller barrel section 12 is smaller than that of the first roller barrel section 11. In this technical solution, the roller is formed by the second roller barrel section 12 with a smaller thermal expansion deformation amount and the first roller barrel section 11 with a relatively larger thermal expansion deformation amount, rather than being entirely made of a material with a single thermal expansion deformation amount. This can reduce the overall axial deformation amount of the roller, effectively reduce the abnormal wear and noise caused by the contact between the roller and the upper and lower flanges after thermal expansion, thereby improving the compressor efficiency and the overall energy efficiency of the machine.

[0030] In some embodiments, the roller further includes a third roller barrel section 13. The third roller barrel section 13 is located on the side of the second roller barrel section 12 away from the first roller barrel section 11, and the thermal expansion deformation amount of the third roller barrel section 13 is equal to that of the first roller barrel section 11. At this time, the second roller barrel section 12 is located between the first roller barrel section 11 and the third roller barrel section 13. When the first roller barrel section 11 and the third roller barrel section 13 deform and contact the corresponding upper and lower flanges, the reaction forces (axial) exerted by the upper and lower flanges on the first roller barrel section 11 and the third roller barrel section 13 will force the axial deformation of the second roller barrel section 12, thereby reducing the abnormal wear between the first roller barrel section 11, the third roller barrel section 13 and the upper and lower flanges.

[0031] In some embodiments, the second roller barrel section 12 has a first radial plane perpendicular to its axis, and the second roller barrel section 12 is symmetric about the first radial plane; and / or, the first roller barrel section 11 and the third roller barrel section 13 are symmetric about the first radial plane, so that the mass distribution of the roller in the axial direction is uniform, which is beneficial to ensuring the dynamic balance of the roller during rotation.

[0032] In some embodiments, the first roller barrel section 11 and the second roller barrel section 12 are detachably connected, and / or, the third roller barrel section 13 and the second roller barrel section 12 are detachably connected. The detachable connection between adjacent two roller barrel sections can make the axial height of the roller more applicable to different working conditions. By assembling the second roller barrel sections 12 with different heights, the overall height of the roller has different specifications, that is, the detachable connection improves the interchangeability of the roller.

[0033] As a specific implementation manner, the second roller barrel section 12 includes an inner ring wall 121 and an outer ring wall 122 arranged coaxially. There are a plurality of connecting plates 123 between the inner ring wall 121 and the outer ring wall 122. On the end face of the first roller barrel section 11 facing the second roller barrel section 12, a plurality of mounting grooves 14 are formed. The plurality of connecting plates 123 are respectively and correspondingly located in the plurality of mounting grooves 14, and / or on the end face of the third roller barrel section 13 facing the second roller barrel section 12, a plurality of mounting grooves 14 are formed. The plurality of connecting plates 123 are respectively and correspondingly located in the plurality of mounting grooves 14. In this technical solution, the second roller barrel section 12 is connected to the first roller barrel section 11 and the third roller barrel section 13 respectively having the mounting grooves 14 at its axial two ends through the connecting plates 123, ensuring the consistency of the circumferential positions of the first roller barrel section 11, the third roller barrel section 13, and the second roller barrel section 12, and further ensuring the synchronism during rotation. In some embodiments, the plurality of connecting plates 123 are evenly spaced along the circumferential direction of the second roller barrel section 12 to ensure the uniformity of the mass of the roller in the circumferential direction and the dynamic balance during the rotation of the roller.

[0034] In some embodiments, referring to Figure 4 As shown, when projected onto a second radial plane perpendicular to the axis of the second roller barrel section 12, the connecting plate 123 is a fan-shaped ring symmetric about its radial center line. The included angle between the radial center lines of two adjacent connecting plates 123 is C, and the included angle formed between the two straight sides of the fan-shaped ring is D, where D≥C / 12. In this way, the connection structural strength between the inner ring wall 121 and the outer ring wall 122 can be ensured, preventing the separation of the inner and outer ring walls during radial deformation.

[0035] In some embodiments, one end of the outer circumferential wall of the first roller barrel section 11 facing the second roller barrel section 12 has a first L-shaped ring groove 111. At least a part of the outer ring wall 122 is located in the first L-shaped ring groove 111, and the outer wall surface of the outer ring wall 122 is on the same circumferential surface as the outer wall surface of the outer circumferential wall. One end of the inner circumferential wall of the first roller barrel section 11 facing the second roller barrel section 12 has a second L-shaped ring groove 112. At least a part of the inner ring wall 121 is located in the second L-shaped ring groove 112, and the inner wall surface of the inner ring wall 121 is on the same circumferential surface as the inner wall surface of the inner circumferential wall, so as to keep the overall outer circumferential wall and inner circumferential wall of the roller smooth and improve its wear resistance. In some embodiments, the radial thickness of the outer ring wall 122 is greater than the radial thickness of the inner ring wall 121, so as to ensure that the outer ring wall 122 has stronger wear resistance.

[0036] In some embodiments, an oil guiding channel is formed in the connecting plate 123. The oil guiding channel can guide lubricating oil from the inner side of the inner ring wall 121 to the mating surface between the outer ring wall 122 and the first roller barrel section 11 and / or the third roller barrel section 13, so as to lubricate the contact mating surfaces between the second roller barrel section 12 and the first roller barrel section 11 and the third roller barrel section 13. The lubricating oil can also be guided to the outer circumferential wall of the roller through the contact gaps between adjacent two barrel sections to achieve lubrication between the outer circumferential wall and the inner wall of the cylinder. It should be particularly noted that the arrangement of the oil guiding channel can also reduce the overall structural strength of the second roller barrel section 12. In this way, the deformation ability of the second roller barrel section 12 after being stressed can be increased. Furthermore, when the roller expands and deforms thermally, when the first roller barrel section 11 and the third roller barrel section 13 with larger deformation amounts apply axial forces to the second roller barrel section 12, the second roller barrel section 12 generates larger elastic deformation to absorb the deformation at the axial two ends of the roller, further reducing the wear at the axial two ends of the roller.

[0037] In some embodiments, the oil guiding channel includes a radially extending section 124 extending along the radial direction of the second roller barrel section 12 and an axially extending section 125 extending along the axial direction of the second roller barrel section 12, wherein the axially extending section 125 is located at one end of the radially extending section 124 away from the axis of the second roller barrel section 12. In a specific embodiment, the apertures of the radially extending section 124 and the axially extending section 125 are 1 mm to 1.5 mm to ensure sufficient supply of lubricating oil. Specifically, an oil inlet 126 is provided on the inner ring wall 121, which can receive the lubricating oil pumped from the main oil channel of the crankshaft. Oil outlets 127 are respectively formed at the axial two ends of the outer ring wall 122.

[0038] In some embodiments, the diameter of the outer peripheral wall of the outer ring wall 122 is A, and the diameter of the circle where the center of the axially extending section 125 is located is H4, and H4 = 0.9A, which can ensure that the axially extending section 125 is long enough, so as to store more lubricating oil when the pumping of the main oil channel of the crankshaft is insufficient and maintain sufficient lubrication at the corresponding parts.

[0039] In some embodiments, the material density of the second roller barrel section 12 is less than that of the first roller barrel section 11 and the third roller barrel section 13. Specifically, the second roller barrel section 12 is made of aluminum alloy material, and the first roller barrel section 11 and the third roller barrel section 13 are made of alloy cast iron material. In this way, the overall mass of the roller can be further reduced, and the dynamic balance performance of the roller can be improved.

[0040] When the whole roller rotates at high speed, the whole roller is unevenly stressed due to the torque change input by the motor, and abnormal wear will occur on the surface of the whole roller. In particular, scratches are commonly generated at the middle position in the axial direction. Therefore, in some embodiments, the outer peripheral wall of the second roller section 12 is provided with a wear-resistant layer, and the wear-resistant layer can be, for example, a DLC metal coating (Diamond-Like Carbon, diamond-like carbon coating) to improve the wear resistance of the outer circumferential wall of the roller and extend the service life of the roller.

[0041] According to an embodiment of the present invention, there is also provided a pump body assembly including the above-mentioned roller.

[0042] According to an embodiment of the present invention, there is also provided a compressor including the above-mentioned pump body assembly.

[0043] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above-mentioned advantageous modes can be freely combined and superimposed.

[0044] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A roller, characterized in that, It includes a first roller barrel section (11) and a second roller barrel section (12) arranged axially along the roller in sequence, wherein the thermal expansion deformation amount of the second roller barrel section (12) is less than that of the first roller barrel section (11); it further includes a third roller barrel section (13), the third roller barrel section (13) is on the side of the second roller barrel section (12) away from the first roller barrel section (11), and the first roller barrel section (11) is detachably connected to the second roller barrel section (12), and / or the third roller barrel section (13) is detachably connected to the second roller barrel section (12); the second roller barrel section (12) includes an inner ring wall (121) and an outer ring wall (122) arranged coaxially, and there are a plurality of connecting plates (123) between the inner ring wall (121) and the outer ring wall (122), and a plurality of mounting grooves (14) are formed on the end face of the first roller barrel section (11) facing the second roller barrel section (12), and the plurality of connecting plates (123) are respectively and correspondingly located in the plurality of mounting grooves (14), and / or a plurality of mounting grooves (14) are formed on the end face of the third roller barrel section (13) facing the second roller barrel section (12), and the plurality of connecting plates (123) are respectively and correspondingly located in the plurality of mounting grooves (14).

2. The roller according to claim 1, wherein The thermal expansion deformation amount of the third roller barrel section (13) is equal to that of the first roller barrel section (11).

3. The roller according to claim 2, characterized in that, The second roller barrel section (12) has a first radial plane perpendicular to its axis, and the second roller barrel section (12) is symmetric about the first radial plane; and / or the first roller barrel section (11) and the third roller barrel section (13) are symmetric about the first radial plane.

4. The roller according to claim 1, characterized in that, The plurality of connecting plates (123) are evenly spaced along the circumferential direction of the second roller barrel section (12).

5. The roller according to claim 4, wherein Projected on a second radial plane perpendicular to the axis of the second roller barrel section (12), the connecting plate (123) is a fan-shaped ring symmetric about its radial center line, and the included angle between the radial center lines of two adjacent connecting plates (123) is C, and an included angle D is formed between the two straight sides of the fan-shaped ring, and D≥C / 12.

6. The roller according to claim 1, wherein, One end of the outer circumferential wall of the first roller barrel section (11) facing the second roller barrel section (12) has a first L-shaped ring groove (111), at least part of the outer ring wall (122) is located in the first L-shaped ring groove (111), and the outer wall surface of the outer ring wall (122) and the outer wall surface of the outer circumferential wall are on the same circumferential surface. One end of the inner circumferential wall of the first roller barrel section (11) facing the second roller barrel section (12) has a second L-shaped ring groove (112), at least part of the inner ring wall (121) is located in the second L-shaped ring groove (112), and the inner wall surface of the inner ring wall (121) and the inner wall surface of the inner circumferential wall are on the same circumferential surface.

7. The roller according to claim 1, characterized in that, The radial thickness of the outer ring wall (122) is greater than that of the inner ring wall (121); and / or, an oil guiding flow passage is formed in the connecting plate (123), and the oil guiding flow passage can guide lubricating oil from the inner side of the inner ring wall (121) to the mating surface of the outer ring wall (122) with the first roller barrel section (11) and / or the third roller barrel section (13).

8. The roller according to claim 7, characterized in that, The oil guiding flow passage includes a radially extending section (124) extending radially along the second roller barrel section (12) and an axially extending section (125) extending axially along the second roller barrel section (12), wherein the axially extending section (125) is located at one end of the radially extending section (124) away from the axis of the second roller barrel section (12).

9. The roller according to claim 8, wherein The diameter of the outer peripheral wall of the outer ring wall (122) is A, and the diameter of the circle where the center of the axially extending section (125) is located is H4, and H4 = 0.9A.

10. The roller according to claim 1, wherein The material density of the second roller barrel section (12) is less than that of the first roller barrel section (11) and the third roller barrel section (13).

11. The roller according to claim 10, characterized in that, The second roller barrel section (12) is made of aluminum alloy material, and the first roller barrel section (11) and the third roller barrel section (13) are made of alloy cast iron material.

12. The roller according to claim 10, characterized in that, A wear-resistant layer is provided on the outer peripheral wall of the second roller barrel section (12).

13. The roller according to claim 12, wherein The wear-resistant layer is a DLC metal coating.

14. A pump body assembly, characterized in that, Comprising the roller according to any one of claims 1 to 13.

15. A compressor, characterized in that, Comprising the pump body assembly according to claim 14.

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