Pressure angle

About: Pressure angle is a research topic. Over the lifetime, 1373 publications have been published within this topic receiving 10245 citations. The topic is also known as: angle of obliquity.

Wind-power generating yaw speed reducer

Abstract: The invention relates to a yaw speed reducer of a wind power generator. Four-stage satellite transmission structures are arranged in a box and are connected with each other to be transmitted to an output gear shaft in sequence; a motor flange is connected to the upper end of the box; the output gear shaft is arranged in a support body through an upper bearing and a lower bearing and is sealed by an oil seal base; a first-stage internal gear ring is connected into the motor flange through bolts; a motor input connection sleeve is arranged in the motor flange through a bearing; the number of theinternal teeth of the motor input connection sleeve is the same as the number of the external teeth of a first-stage sun gear; and the internal teeth of the motor input connection sleeve and the external teeth of the first-stage sun gear have the same modulus and the same pressure angle of 20 degrees and are in mutual meshing transmission. The yaw speed reducer has compact structure, reasonable design, good uniform-loading effect, strong bearing and impact resistance capacity, good sealing performance and a uniformly-forced satellite gear meshed with the floating sun gear, is convenient to make and not easy to cause the environmental pollution and runs stably, thereby meeting the requirements of the clients.

Damming arrangement for flood protection

Abstract: The individual damming beams are connected at vertical posts 17 which are inserted into sleeves 18 arranged in the ground. Located at ground level is an encircling angle 20 to which a seal 21 is attached. U-shaped openings 30 for connecting the damming beams are located at the side of the inserted posts 17. The U-shaped openings 30 are each formed by a fixed angle 31 with a vertically running seal 25 and a movable pressure angle 32 at the opposite side. The movable pressure angles are guided by pins 43 in guides 33 directed down at an angle and in the form of elongated holes.

Research on Dynamic Load-Sharing Characteristics of Two-Stage Asymmetric Star Gear System

Abstract: It is well known that the asymmetric gears of the transmission system enhances the load carrying capacity of system, but there is no relevant conclusion about the dynamic load-sharing characteristics of the asymmetric gear transmission system. In order to analyze the dynamic performance of an asymmetric gear system, taking two-stage asymmetric helical gear star drive system as the research object, the load-sharing model of the two-stage asymmetrical helical star gear system is established by the centralized mass method and Newton's second law. The load sharing characteristic of the star gear is studied about the floating member and the tooth profile pressure angle. The influence of eccentricity error, load and input speed on the load sharing performance of the system is analyzed. Based on ADAMS virtual prototype model, through the simulation analysis of the dynamic meshing force of gears, the load sharing coefficient of each star gear is calculated, compare the results with the MATLAB solution to verify the correctness of the theory.

Rotary positive-displacement fluid-machines

Abstract: The invention concerns helical- or screw-type driving and driven rotors having lands and intervening grooves for coacting engagement, within a housing of a machine, such as a gas compressor or expander, the rotors having improved, more efficient, profiles. The profiles are defined with contiguous elliptic and involute sections to improve the pressure angle, and the profiles are configured to define rotor-to-rotor sealing surfaces in closure of a compressed gas pocket in which, the pocket gas pressure always urges or torques the driven rotor in the positive or forward-rotary direction.

Synthesis of the base curves of non-circular gears via the return circle

Abstract: The subject of this paper is the synthesis of the base curves of non-circular gears by means of the Aronhold theorem and the return circle. The base curves can be generated in several ways, as reported in the literature, but this approach comes from the kinematics fundamentals; it is, thus, more comprehensive and useful. In particular, the base curves are obtained by intersecting at each pitch point, the corresponding return circle with the line of action for a given pressure angle.