Exhaust port of composite gear tooth compressor and design method thereof

Abstract

The invention discloses an exhaust port of a composite gear tooth compressor. The exhaust port (401) is formed in an exhaust end cover (4); the contour curve of the exhaust port (401) comprises: a left edge curve EF, a right edge curve GH, an upper edge curve EH, a lower edge curve FG, a left upper vertex E, a left lower vertex F, a right upper vertex H and a right lower vertex G; the left edge curve EF, the right edge curve GH and the upper edge curve EH are three circular arcs; and the lower edge curve FG is a partial curve of a first cycloid AB of a first tooth groove (101). The exhaust port (401) is large in area, low in exhaust velocity and small in exhaust pressure loss; power consumption of the compressor and leakage of high-pressure gas at the exhaust port at the end face of a rotor are effectively reduced; and clearance volume formed after the exhaust is finished is small, volume efficiency is high, and meanwhile the internal volume ratio of the compressor is larger.

Description

technical field [0001] The invention belongs to the technical field of compressor engineering, and in particular relates to an exhaust port of a compound tooth compressor and a design method thereof. Background technique [0002] The composite tooth compressor is a new type of positive displacement compressor. The main structure is composed of a left concave rotor (1), a right convex rotor (2), a casing (3) and an exhaust end cover (4). An exhaust port (401) is provided on the cover (4), wherein the left concave rotor (1) is composed of a plurality of uniformly distributed tooth slots and left drive teeth, and the right convex rotor (2) is composed of a plurality of uniformly distributed convex teeth and right Composed of transmission teeth; its working principle is: the right convex rotor (2) drives the left concave rotor (1) through the transmission teeth to do synchronous and opposite double-rotational motions, and passes through the left concave rotor (1), right convex r...

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Problems solved by technology

[0004] In view of the problems of high gas flow rate, large leakage and large clearance volume in the exhaust port of the existing compound gear compressor, the present invention proposes an exhaust port of the compound gear compressor and its design method. A certain internal volume ratio, the first tooth groove and the end surface profile of the first convex tooth construct the contour curve of the exhaust port; the present invention adopts multi-section arcs and cycloids to construct the contour curve of the exhaust port, and the constructed exhaust port The exhaust is more reasonable, the exhaust speed is low, and the exhaust pressure loss is small; the proposed exhaust port of a composite tooth compressor can effectively reduce the leakage of high-pressure gas at the exhaust port at the end face of the rotor, and at the same time exhaust Small clearance volume formed after finishing

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