3results about How to "Reduce shaft diameter" patented technology

This utility model relates to the field of wind turbine pitch reducer technology, specifically to a pitch reducer structure, including an output shaft and a housing. One end of the output shaft is connected to a planetary carrier. The output shaft includes a first connecting section and a second connecting section arranged sequentially from the outside to the inside along the axial direction. The second connecting section has external threads, and the inner wall of the planetary carrier has internal threads. The first connecting section has multiple external pin holes, and the planetary carrier has multiple internal pin holes. Matching internal and external pin holes together form mounting pin holes, with locating pins inside. The planetary carrier and the output shaft are axially positioned by the matching of internal and external threads, and circumferentially positioned by the matching of mounting pin holes and locating pins. A large tapered bearing and a small tapered bearing are provided between the housing and the output shaft, with the small tapered bearing positioned close to the planetary carrier. The reducer components in this design have reliable positioning, low risk of component failure, high safety, and can significantly reduce the risk of off-center loading.

The utility model provides a kind of crankshaft and compressor, crankshaft includes the crank, counterweight and main shaft being connected with each other, crank is used to be driven with connecting rod connection, main shaft has cylinder seat cooperation section, the ratio of the axial dimension of crank and the diameter of crank is between 0.98 to 1.2, the length of cylinder seat cooperation section accounts for 59.3% to 69.3% of the length of main shaft.The utility model application solves the stress concentration risk of small shaft diameter crank in prior art, easy to cause crank fatigue fracture, and further causes the problem of equipment failure.

According to the electrically-controlled variable-pitch aircraft propeller, when the propeller pitch angle of the movable propeller blade needs to be adjusted, a control host is communicated with an electrical loop through a conductive slip ring to control the forward / reverse rotation action of a speed reducing motor so as to drive a driving gear, a driven gear, a worm and gear set and a rotating shaft to achieve controllable rotation of the movable propeller blade; therefore, the synchronous adjustment of the pitch angles of the movable paddles is completed. The device is simple in structure, high in reliability and low in maintenance cost. The problems that a variable pitch propeller is easy to damage, difficult to maintain and high in cost in a high-pressure lubricating oil driving mode can be better solved, meanwhile, the rotating shafts of the movable blades are of a two-end shaft hole distributed stress structure, and under the condition that mechanical performance strength redundancy is guaranteed, the diameter of the rotating shafts can be reduced, and the purpose of reducing the weight of a propeller hub unit assembly can be achieved.