Megawatt planet differential wind power speed increasing box

Abstract

A megawatt planet differential wind power speed increasing box of the invention is composed of a frame, an input shaft and a bearing, a differential, a quasi-planet and parallel shaft output engaging teeth A and B; wherein the planet differential comprise a sun gear (15), a planet gear (11), a planet carrier (16) and a ring gear (10); the quasi-planet comprises the sun gear (15) cohered with the planet carrier, quasi-planet gears (8), a planet axel (7) and a rack (4); wherein the differential sun gear (15) is arranged at an axle (6), the planet carrier (16) is connected with a sun gear (5) of the quasi-planet and is sheathed at the gear (6) in the air. The speed increasing box is characterized in that: (a) the two engaging teeth both have identical number of teeth z and modulus m; (b) the splines of the surfaces of the excircles of the two engaging teeth match with splines in a cylinder of an input shaft (14). The speed increasing box has the following benefits: assembly and disassembly are convenient, thus being capable of being overhauled aloft; the weight is reduced by 40-55%, the machining process is good and the cost is low; the efficiency eta is the same as planet plus dead axle and is higher than the efficiency of 'duplicident four-stage speed increasing'.

Description

technical field [0001] It relates to the technical field of wind power speed-up box, and relates to a megawatt-level planetary differential wind power speed-up box. Background technique [0002] It is estimated that the wind power generation capacity will increase from 10 million kW in 2010 to 30 million kW in 2020, requiring nearly 20,000 1.5MW speed-up boxes, with an output value of about 20 billion. With such a large number and extremely harsh service conditions, it is obvious that the most advanced gearbox should be as light as possible, easy to disassemble and assemble, and can be overhauled at high altitude. There are two types of background technology: (1) NGW planet + fixed axis, 1 invention patent and 12 new types; NGW quasi-planetary + fixed axis, 2 new types, such as "Planetary Drive Wind Power Gearbox" (03237681) . The main problems are: (a) the gear box is heavy and the price is high; (b) the full complement bearing must be imported, which is expensive and has...

AI Technical Summary

Problems solved by technology

The main problems are: (a) the gear box is heavy and the price is high; (b) the full complement bearing must be imported, which is expensive and has a long booking period; (c) it is difficult to disassemble and install during overhaul and must be hoisted to the ground; (2) the heavy gear Company: "Differential planetary gearbox" (0720125000), is the most novel structure among modern wind power gearboxes: NGW planetary + quasi-planetary + planetary differential + parallel shaft

The existing problems are: (a) the disadvantage of the input stage large internal ring gear being used as a box body is that the thermal deformation and stress deformation of the large box body will reduce the strength of the thin-walled internal ring gear; (b) the structure is complex and the machining process Difficult, such as a large box (15); (c) four-stage speed increase, the efficiency η is lower than the existing NGW planetary + fixed shaft transmission, and the axial dimension is long

Images