A compression heat pump screw host helical teeth and a compression heat pump screw host

Abstract

The invention discloses helical teeth of a compression heat pump helix main engine. The helical teeth of the compression heat pump helix main engine can be subjected to finish-milling, and the helical teeth comprise anode helix teeth and cathode helix teeth, wherein tooth profiles of the anode helix teeth and the cathode helix teeth are double-sided asymmetric helical tooth molded lines, and constituted curves are circular arc and envelope lines. The helical teeth are characterized in that the tooth number ratio of the anode helix teeth to the cathode helix teeth is 5:6; a tooth profile space yoke clearance of the anode helix teeth and the cathode helix teeth is 0.04-0.06mm. According to the helical teeth of the compression heat pump helix main engine and the compression heat pump helix main engine, tangent slope transition is adopted on a joint part of the constituted tooth profile curves which are formed at the two adjacent ends, a space curve contact line is short, and the contained volume is small, so that the formation of a pressure oil film is facilitated; machining sharp points, repeated points and discontinuity points can be eliminated so as to form smooth transition; a coordinate of a tooth root and a tooth top is subjected to rounding so that finish-milling is convenient to carry out; the power loss is effectively reduced, and a high-efficient space zero-to-zero sealing contact zone is provided; the utilization rate of intertooth space area is increased; moreover, the helical teeth are in a streamline form, and small in pneumatic resistance, thus relatively high efficiency is achieved.

Description

technical field [0001] The invention belongs to the technical field of machinery, and in particular relates to a helical tooth of a compression heat pump screw main engine and a compression heat pump screw main engine. Background technique [0002] The optimally designed screw main engine is safe and reliable in operation, so it is more and more widely used in the industrial sector. The rated power of the existing screw main engine is usually below 110kw, and the rated pressure range is 5kg-13kg for medium pressure. [0003] The development of the screw host depends largely on the optimized design of the helical tooth profile and precision machining and cutting tool technology. With the continuous development of numerical control technology, computer technology, machine tool technology and cutting tool processing technology, the outer circle of the original traditional spiral teeth is mostly within 200mm, and most of the spiral tooth profile designs that rely on imported eq...

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Problems solved by technology

With the continuous development of numerical control technology, computer technology, machine tool technology and cutting tool processing technology, the outer circle of the original traditional spiral teeth is mostly within 200mm, and most of the spiral tooth profile designs that rely on imported equipment for fine grinding will result in high initial investment costs. It can no longer meet the basic requirements of customers. Under the market competition where users have high requirements for processing cost, efficiency and precision, it is necessary to carry out the research and development and optimization design of the helical tooth profile that can be finely milled, and achieve the actual economic benefits of mass production.

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