Internal gear pump has two kinds of tooth profile namely: involute profile and cycloidal tooth profile.
内啮合齿轮泵有两种齿形即：渐开线齿形和摆线齿形。
Cycloidal tooth profile of the internal gear pump, also called cycloidal rotor pump, pump the small gear and internal gear only related a tooth, so the internal gear pump do not need to set partition.摆线齿形的内啮合齿轮泵又叫做摆线转子泵，泵中的小齿轮和内齿轮只相关一个齿，因此这种内啮合齿轮泵不需要设置隔板。
Mainly engaged in a new type of lateral pressure without cycloidal gear linkage within the internal combustion engine research and development of economic management and software development.主要从事新型无侧压无连杆内摆线
行星齿轮内燃机的研制开发和经济管理软件的开发。