A screw compressor rotor
By optimizing the design and processing methods of the male and female rotors of the screw compressor, the problems of high noise and insufficient sealing performance were solved, achieving efficient and stable meshing and sealing, and improving the overall performance of the screw compressor.
Patent Information
- Application Number
- CN202522288462.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-29
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-10-29
AI Technical Summary
The design of the male and female rotor tooth profiles in existing screw compressors is unreasonable, resulting in poor dynamic performance, high noise, insufficient sealing performance, low efficiency, and insufficient tooth strength, which makes them prone to fatigue damage.
The rotor adopts a bilateral asymmetric circular arc or circular arc envelope design with female and male rotors, a tooth ratio of 5:6, and a clearance of 0.04-0.08mm. The rotor curve is optimized by grinding to improve meshing stability and sealing performance.
Reduce noise, improve sealing efficiency and structural rigidity, enhance load-bearing capacity, reduce friction and wear, and improve the operating efficiency of screw compressors.
Smart Images
Figure CN224679683U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of screw compressor manufacturing technology, specifically a screw compressor rotor. Background Technology
[0002] In recent years, the refrigeration and freezing industry has continued to expand, and screw compressors, with their excellent medium and low temperature performance, have become key equipment for ensuring temperature control in food processing, large-scale warehousing, and cold chain logistics. At the same time, the industrial refrigeration sector is experiencing a significant increase in demand for large-displacement open-type screw compressors due to the continued construction of large-scale chemical projects and the phasing out of small-scale chemical production capacity.
[0003] For screw compressors, the rotor profile directly affects performance. Currently, representative screw rotor profiles worldwide mainly include designs from a German company, a Swedish company, and companies from Taiwan and Japan. These profiles employ different curve types and combinations, and due to differences in design philosophy and application objectives, each has its own advantages and limitations.
[0004] A common defect in existing technology is that the tooth profile design of the male and female rotors is not reasonable enough, resulting in poor dynamic performance during meshing. This problem causes screw compressors to have significant noise, insufficient sealing performance, and low overall efficiency during operation. At the same time, unreasonable tooth profile design also weakens the tooth strength and easily leads to fatigue damage and other problems. Utility Model Content
[0005] To solve the above problems, this utility model proposes a screw compressor rotor, and the technical solution adopted is as follows: A screw compressor rotor includes a male rotor and a female rotor, the two sides of the female and male rotors are asymmetrical, and the curves formed are circular arcs or circular arc envelopes. The tooth ratio of the male rotor to the female rotor is 5:6. The characteristic feature is that the gap between the female and male rotors is 0.04-0.08mm. Taking the center point of the female rotor as the origin, the coordinates of the discrete points of the female rotor profile and the male rotor profile are as follows: .
[0006] In a further preferred embodiment of the present invention, the gap between the female rotor and the male rotor is 0.06 mm.
[0007] In a further preferred embodiment of the present invention, the male rotor has a tooth tip circle diameter of 280 mm, a tooth root circle diameter of 175 mm, and a pitch circle diameter of 181.818 mm; the female rotor has a tooth tip circle diameter of 225 mm, a tooth root circle diameter of 120 mm, and a pitch circle diameter of 218.182 mm.
[0008] In a further preferred embodiment of the present invention, the female rotor and the male rotor are machined by grinding.
[0009] In a further optimization of the technical solution of this utility model, the diameter of the cutting tool disc used to process the female rotor and the male rotor is 248mm, and the installation angle is 43.392°.
[0010] Compared with the prior art, the advantages of this utility model are: Compared with the prior art, the rotor teeth of the screw compressor of this utility model are all circular arcs or circular arc envelopes, with short contact lines, smooth meshing, and easy to process by grinding. While reducing noise and maintaining efficient sealing between curved surfaces, it significantly improves the area utilization efficiency, enhances the structural rigidity and load-bearing capacity of the rotor, and can be used in working conditions with large pressure differences. It effectively reduces friction and wear during operation and improves the operating efficiency of the screw compressor. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the end face profiles of the male and female rotors of this utility model in a rectangular coordinate system; Figure 2 This is a schematic diagram of the cutting edge shape of the male rotor tool of this utility model; Figure 3 This is a schematic diagram of the cutting edge shape of the female rotor tool of this utility model; Explanation of reference numerals in the attached diagram: 1. Female rotor; 2. Male rotor. Detailed Implementation
[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.
[0013] Example 1 like Figure 1 As shown, a screw compressor rotor of this embodiment includes a male rotor 2 and a female rotor 1. The female rotor 1 and the male rotor 2 are bilaterally asymmetrical, and the curves formed are circular arcs or circular arc envelopes. The tooth ratio of the male rotor to the female rotor is 5:6. The gap between the female rotor 1 and the male rotor 2 is 0.04-0.08mm. With the center point of the female rotor 1 as the origin of the coordinate system, the discrete point coordinates of the profile of the female rotor 1 and the profile of the male rotor 2 are as follows.
[0014] .
[0015] The gap between the female rotor 1 and the male rotor 2 is 0.06 mm.
[0016] The male rotor has a tooth tip circle diameter of 280 mm, a tooth root circle diameter of 175 mm, and a pitch circle diameter of 181.818 mm; the female rotor has a tooth tip circle diameter of 225 mm, a tooth root circle diameter of 120 mm, and a pitch circle diameter of 218.182 mm.
[0017] In this embodiment, both the female rotor and the male rotor are machined by grinding.
[0018] In this embodiment, the cutting edge shape of the female rotor tool used for machining the female rotor is as follows: Figure 3 As shown, the cutter head diameter of the female rotor tools used for machining the female rotor is 248 mm, and the installation angle is 43.392°. In this embodiment, the cutting edge shape of the male rotor tool used for machining the male rotor is as follows: Figure 2 As shown, the cutter head diameter of the male rotor tools used to machine the male rotor is 248mm, and the installation angle is 43.392°.
[0019] The above embodiments are only for illustrating the technical concept of this utility model and should not be used to limit the protection scope of this utility model. Any modifications made to the technical solution based on the technical concept proposed by this utility model shall fall within the protection scope of this utility model.
Claims
1. A screw compressor rotor, comprising a male rotor (2) and a female rotor (1), wherein the female rotor (1) and the male rotor (2) are bilaterally asymmetrical, and the curves forming the rotor are circular arcs or circular arc envelopes, and the tooth ratio of the male rotor to the female rotor is 5:6, characterized in that: The gap between the female rotor (1) and the male rotor (2) is 0.04-0.08 mm. Taking the center point of the female rotor (1) as the origin, the discrete point coordinates of the female rotor (1) profile and the male rotor (2) profile are as follows: 。 2. A screw compressor rotor according to claim 1, characterized in that: The gap between the female rotor (1) and the male rotor (2) is 0.06 mm.
3. A screw compressor rotor according to claim 1, characterized in that: The male rotor has a tooth tip circle diameter of 280 mm, a tooth root circle diameter of 175 mm, and a pitch circle diameter of 181.818 mm; the female rotor has a tooth tip circle diameter of 225 mm, a tooth root circle diameter of 120 mm, and a pitch circle diameter of 218.182 mm.
4. A screw compressor rotor according to claim 1, characterized in that: The female rotor and the male rotor are machined by grinding.
5. A screw compressor rotor according to claim 1, characterized in that: The cutting tools used to machine both the female and male rotors have a diameter of 248 mm and an installation angle of 43.392°.