Compressor screw rotor
By designing an asymmetrical male and female screw rotor tooth profile structure, the problems of long contact lines and large leakage triangles in traditional screw rotors are solved, thereby improving the compressor's efficiency and reducing noise.
Patent Information
- Application Number
- CN202520026838.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-01-07
AI Technical Summary
Traditional screw compressors have long contact lines and large leakage triangles, resulting in low compressor efficiency and high noise.
The design incorporates asymmetrical double-sided tooth structures for both the female and male screw rotors, with reasonable tooth shapes and dimensions. The female screw rotor's tooth shape is a combination of circular arcs, ellipses, and parabolas, while the male screw rotor's tooth shape is a combination of cycloids, ellipses, and parabolas. The two are mutually compatible, reducing contact lines and leakage triangles.
It effectively improves the compressor's working efficiency and reduces operating noise.
Smart Images
Figure CN223578219U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to screw compressor technical field, concretely is a kind of compressor screw rotor. BACKGROUND
[0002] Screw compressor is a kind of equipment using a pair of intermeshing helical rotors to compress gas, and its working principle is based on volumetric compression. Through the rotation and intermeshing of the rotors, the gas is compressed in a closed space, thereby increasing the pressure. Screw compressor includes male screw rotor and female screw rotor, and the two rotors intermesh to form a series of closed chambers. When the screw rotates, the volume of these chambers gradually decreases, resulting in an increase in the pressure of the gas in the chamber, which realizes the compression of the gas medium. The design of screw rotor profile and screw is the key of screw compressor. The long contact line and large leakage triangle of the conventional screw rotor make the compressor inefficient and noisy during operation. SUMMARY
[0003] The utility model aims at providing a kind of compressor screw rotor, effectively solve the problem raised in the above background technology.
[0004] To achieve the above object, the utility model provides the following technical scheme.
[0005] A kind of compressor screw rotor, including female screw rotor and male screw rotor;Female screw rotor and male screw rotor double-sided tooth profile structure is asymmetric;The tooth profile end of the adjacent two teeth of female screw rotor and male screw rotor is mutually supported;The tooth groove bottom of female screw rotor and male screw rotor is mutually adapted;The tooth number of female screw rotor is eight, and the tooth number of male screw rotor is six.
[0006] Preferably, one side of the tooth profile of female screw rotor is force transmission edge, and the other side is sealing edge;Force transmission edge is in turn circular arc A, ellipse A, second cycloid and parabola;Sealing edge is in turn circular arc B and ellipse B.
[0007] Preferably, one side of the tooth profile of male screw rotor is in turn first cycloid, first elliptical envelope and first circular arc, and the other side is in turn second elliptical envelope, second circular arc and parabolic envelope;The shape of first elliptical envelope is adapted to the shape of ellipse B;The shape of second elliptical envelope is adapted to the shape of ellipse A;The shape of parabolic envelope is adapted to the shape of parabola.
[0008] Preferably, the outer diameter of female screw rotor is 90mm, and the outer diameter of male screw rotor is 125mm;The length of female screw rotor and male screw rotor is all 190mm.
[0009] Preferably, the torsion angle of male screw rotor is 320 °.
[0010] Preferably, the female screw rotor has a length-diameter ratio of 2.11, and the male screw rotor has a length-diameter ratio of 1.52.
[0011] Compared with the prior art, the compressor screw rotor structure has the following beneficial effects.
[0012] The female screw rotor and the male screw rotor are designed in a double-sided tooth shape and are asymmetric, and the two tooth shapes and sizes are reasonably designed, so that the contact line of the two rotors is short and the leakage triangle is small during compression work, and thus the working efficiency of the compressor is effectively improved, and the working noise is also obviously improved. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 The utility model provides a compressor screw rotor structure schematic diagram. DETAILED DESCRIPTION
[0014] As Figure 1 shown, the utility model provides a kind of compressor screw rotor, including female screw rotor 1, male screw rotor 2, first cycloid 21, first elliptical envelope 22, first circular arc 23, second elliptical envelope 24, second circular arc 25, parabolic envelope 26, force transmission edge 3, circular arc A31, ellipse A32, second cycloid 33, parabola 34, sealing edge 4, circular arc B41 and ellipse B42.
[0015] The technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.
[0016] In the description of the embodiments of the utility model, it should be explained that, unless there is explicit specification and limitation, the terms "connect", "mount" should be understood in broad sense, for example, "connect" can be detachably connected, can also be inseparably connected;It can be directly connected, can also be indirectly connected through intermediate medium.In addition, "communication" can be directly communicated, can also be indirectly communicated through intermediate medium.Among them, "fixed" refers to the relative position relationship of each other after connection does not change.The orientation language mentioned in the embodiments of the utility model, for example, "inner", "outer", "top", "bottom" and the like, is only the direction of reference drawing, therefore, the orientation language used is for better, more clearly illustrate and understand the embodiments of the utility model, and is not indicated or implied that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as the limitation of the embodiments of the utility model.
[0017] In the embodiments of the present application, the terms "first" and "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features.
[0018] Embodiment one
[0019] The female screw rotor 1 and the male screw rotor 2 have asymmetric double-sided tooth profile structures; the tooth profile end portions of the adjacent two teeth of the female screw rotor 1 and the male screw rotor 2 are mutually connected; the tooth groove bottoms of the female screw rotor 1 and the male screw rotor 2 are mutually matched; the number of teeth of the female screw rotor 1 is eight, and the number of teeth of the male screw rotor 2 is six.
[0020] Specifically, one side of the tooth profile of the female screw rotor 1 is a force transmission edge 3, and the other side is a sealing edge 4; the force transmission edge 3 is in turn a circular arc A31, an ellipse A32, a second cycloid 33 and a parabola 34; and the sealing edge 4 is in turn a circular arc B41 and an ellipse B42.
[0021] Specifically, one side of the tooth profile of the male screw rotor 2 is in turn a first cycloid 21, a first elliptical envelope 22 and a first circular arc 23, and the other side is in turn a second elliptical envelope 24, a second circular arc 25 and a parabolic envelope 26; the shape of the first elliptical envelope 22 is matched with the shape of the ellipse B42; the shape of the second elliptical envelope 24 is matched with the shape of the ellipse A32; and the shape of the parabolic envelope 26 is matched with the shape of the parabola 34.
[0022] The female screw rotor 1 and the male screw rotor 2 provided by the present application have asymmetric double-sided tooth profile designs, and the two tooth profiles and the sizes are reasonably designed, so that the contact line of the two rotors is short and the leakage triangle is small when the two rotors are working, thereby effectively improving the working efficiency of the compressor, and the working noise can also be obviously improved.
[0023] Embodiment two
[0024] Compared with embodiment one, the difference of the present embodiment lies in that the outer diameter of the female screw rotor 1 is 90mm, and the outer diameter of the male screw rotor 2 is 125mm; the length of the female screw rotor 1 and the length of the male screw rotor 2 are both 190mm.
[0025] Embodiment three
[0026] Compared with embodiment two, the difference of the present embodiment lies in that the torsion angle of the male screw rotor 2 is 320°, the length-diameter ratio of the female screw rotor 1 is 2.11, and the length-diameter ratio of the male screw rotor 2 is 1.52.
[0027] It should be explained that the data in embodiment two and embodiment three are preferred data, and the data size can be changed as needed.
[0028] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and are non-limiting, the scope of the present application being defined by the appended claims rather than by the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims
1. A compressor screw rotor comprising a female screw rotor (1) and a male screw rotor (2), characterized in that: The female screw rotor (1) and the male screw rotor (2) are asymmetric in bilateral tooth profile structure; the tooth profile end portions of the adjacent two teeth of the female screw rotor (1) and the male screw rotor (2) are mutually connected; the tooth groove bottoms of the female screw rotor (1) and the male screw rotor (2) are mutually matched; the number of teeth of the female screw rotor (1) is eight, and the number of teeth of the male screw rotor (2) is six.
2. A compressor screw rotor according to claim 1, characterized in that: One side of the tooth profile of the female screw rotor (1) is a force transmission edge (3), and the other side is a sealing edge (4); the force transmission edge (3) is sequentially a circular arc A (31), an elliptical A (32), a second cycloid (33) and a parabola (34); the sealing edge (4) is sequentially a circular arc B (41) and an elliptical B (42).
3. A compressor screw rotor according to claim 2, characterized in that: One side of the tooth profile of the male screw rotor (2) is sequentially a first cycloid (21), a first elliptical envelope (22) and a first circular arc (23), and the other side is sequentially a second elliptical envelope (24), a second circular arc (25) and a parabolic envelope (26); the shape of the first elliptical envelope (22) is matched with the shape of the elliptical B (42); the shape of the second elliptical envelope (24) is matched with the shape of the elliptical A (32); the shape of the parabolic envelope (26) is matched with the shape of the parabola (34).
4. A compressor screw rotor according to claim 1, characterized in that: The outer diameter of the female screw rotor (1) is 90mm, and the outer diameter of the male screw rotor (2) is 125mm; the length of the female screw rotor (1) and the length of the male screw rotor (2) are both 190mm.
5. A compressor screw rotor according to claim 1, characterized in that: The torsion angle of the male screw rotor (2) is 320°.
6. A compressor screw rotor according to claim 1, characterized in that: The length-diameter ratio of the female screw rotor (1) is 2.11, and the length-diameter ratio of the male screw rotor (2) is 1.52.