Patent EA-034265-B1 (EA)
Title: Four-stage multiplier for a wind power unit
Inventor: SALAMOV OKTAJ MUSTATA OGLY
IPC: F16H57/08
Filed: 2017-08-23
Abstract: The invention is related to the field of mechanical engineering and can be used in high-power wind power units (WPU). The objective of the invention is to increase the reliability of operation and efficiency of the multiplier (M), reduce friction losses, as well as metal consumption, overall dimensions and production cost through improvement of structure and lubrication system. To solve the problem, the housing of M for the WPU consists of four sections, inspection windows in the shape of small covers are made on the top of the third section and on the back side of the fourth section. The first and fourth sections of the housing are made, respectively, as caps of round and rectangular shape. The shaft of the sun gear (SG) by the two bearings (B) concentrically positioned one inside the other, with a certain intermediate distance, is attached to the left wall of the third section of housing. The inner B is directly seated on the SG shaft, and a cylindrical stub made on the right side of the pinion carrier (PC) is inserted into the intermediate space between the inner and outer B, which is simultaneously in contact with both the outer surface of the inner B and the inner surface of the outer B. The upper part of the place of abutment of the wall of PC to the outer ring of the inner B, is made sloping from left to right, and the upper part of the place of abutment of the wall of the third section of the M housing to the outer ring of the outer B is sloping from right to left, in the form of conical surfaces. The slave GW of the second stage with the master GW of the third stage and the slave GW of the third stage with the leading GW of the fourth stage are made as an integral part, i.e. as the first and second gear blocks. A cylindrical passage channel is made along the entire length of the central part of the SG shaft, and a metal pipe (MP) is installed in this channel, with an intermediate distance of 5-40 mm along the entire circumference. The gear wheels (GW) of the second, third and fourth stages are mounted on two shafts, one located in the central part and the other one in the side part of the third section of the M housing. The shaft located in the central part by means of a spline connection is connected to the SG and the leading GW of the second stage, teeth are made on these parts, and this shaft plays the role of shaft for the SG, and the shaft located on the side plays the role of output shaft. M is equipped with a force lubrication system (FLS), consisting of a mechanical oil pump (MOP), an oil cooler (OC), oil transfer pipes (OTP) and oil distribution channels (ODC). For rotation of the MOP shaft, M is equipped with an additional single-stage cylindrical gearing (ASSCG). The SG shaft, the M output shaft, and the ASSCG output shaft are made in step form, with variable diameters. OC FLS consists of a fan, a heat exchanger made in the form of coil and radiator and is installed on the output line of the MOP. The MOP input line by the OTP is connected with the lower part of the M housing, which plays the role of a pan (S) for oil. Another part of the OTP connected to the MOP output, has four main OTP and one additional OTP with a smaller diameter fitted with an oil spray nozzle (OSN). Additional OTP from the lower side is divided into two parts. Due to improved design, the number of parts of the proposed four-stage M for WPU is significantly reduced, which leads to a reduction in metal consumption and overall dimensions, and an increase in efficiency and reliability, as well as a significant reduction in its cost. Reducing the overall dimensions and weight of M also leads to a significant facilitation of transportation and lower transportation costs. The use of a more advanced FLS in the proposed M leads to a significant increase in the service life of its working parts, and minimizes friction losses.