Method for forming single screw compressor tooth surface mold line enveloped by poly-cylindrical mill with non-equal length
A non-equal-length, cylindrical milling cutter technology, applied in the direction of gear teeth, mechanical equipment, components with teeth, etc., can solve the problems of increased gas leakage, leakage, etc.
Inactive Publication Date: 2012-05-23
XI AN JIAOTONG UNIV
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Problems solved by technology
[0004] However, when the tooth surface of the single-screw compressor rotor tooth surface of the multi-cylindrical equal-length milling envelope meshes with the corresponding star gear tooth surface, when the rear side of the star gear teeth breaks away from the screw tooth groove, a large leakage triangle will be formed. , resulting in a substantial increase in gas leakage during the exhaust process
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[0023] In order to express the present invention more clearly, at first provide following definition:
[0024] Screw tooth surface profile - the trajectory left on the rotor tooth surface during the meshing and sliding process of the given point on the star gear tooth surface becomes the single screw tooth surface profile line, which is actually the screw tooth surface profile line. The inner tooth surface of the cylinder is like a waist-shaped spiral generatrix.
[0025] Star wheel tooth surface profile - the section curve at any radius of the star wheel tooth surface is called the star wheel tooth surface profile line.
[0026] The definition of the front side of the tooth and the rear side of the tooth is: for any star gear tooth, in the rotation direction of the star wheel, the tooth surface at the front position is called the front side of the tooth, and the tooth surface at the rear position is called the rear side of the tooth.
[0027] The definition of slot front sid...
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The invention discloses a method for forming a single screw compressor tooth surface mold line enveloped by poly-cylindrical mill with non-equal length. The same tooth surface bus of a screw rotor is cut repeatedly by using a poly-cylindrical milling cutter in different directions to realize poly-cylindrical envelopment of mole lines. In an engagement period of a star-wheel tooth surface and the screw rotor tooth surface, at least 2 / 3 of the areas on the star-wheel tooth surface mold line can contact the screw rotor tooth surface mold line, that is to say, one complete bus on the screw rotor tooth surface is a combined mold line formed by enveloping multiple points on the star-wheel tooth surface mold line. By adopting the milling of the cylindrical milling cutter, the screw rotor tooth surface with the mold line can be processed. The screw rotor enveloped by the polycylinder with non-equal length and the star-wheel mold line can ensure that the star-wheel tooth surface is in even slide engagement with the screw rotor tooth surface, particularly the star-wheel tooth forms a small leakage triangle at the engagement exit area so that the gas leakage is greatly reduced in the exhaustprocess of the single screw compressor.
Description
technical field [0001] The present invention relates to a profile structure for the meshing pair of a single-screw compressor and a pump, in particular to a multi-cylinder non-equal-length milling envelope single-screw tooth profile and its corresponding meshing star wheel tooth profile constitute. Background technique [0002] Single screw compressor ( figure 1 , figure 2 ) and the pump are recognized as a rotary machine with excellent overall structural performance. It is composed of a single screw rotor, two star wheels and a casing. Since the development in the United States, Japan and other countries in the 1960s, a variety of products have entered the industrial market. Especially the screw compressors made by some companies in the United States, Japan and other countries have relatively good performance, but their star wheel and screw core technology have not been made public. In China, there are also many manufacturers who have developed and manufactured this ki...
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IPC IPC(8): B23F5/20
Inventor 赵忖吴伟烽冯全科徐健郭蓓余小玲
Owner XI AN JIAOTONG UNIV