| 摘要 |
A gear is provided with smaller teeth, transition teeth and larger teeth. The end surface of the larger teeth is made in the shape of the eagle mouth and its flank profile curve is designed to connect the lines of the back of the teeth, teeth crest, side recess and gullet smoothly. Two ends of the larger teeth are connected to the smaller teeth through the transition teeth. The novel features of the invention reside in that the gears can be made in such a way that the leakage is reduced to thereby balance the inertia force of the rotors and eliminate the vibration and noise. In addition, the invention discloses a fluid machine being suitable for transmitting and compressing and expanding liquid or gas, which includes a housing with a cylinder block and two end covers, a pair of gears with at least one driving rotor and one driven rotor in the housing, thereby reduce the leakage between the rotors and increase ratio of the pressure and avoid the process of the overcompression and the under-compression according to the invention. |
