If it’s a question of low weight and space saving…

BHS planetary gears are built for a wide range of powers and speeds, and are used for the most diverse applications. Our planetary gears are used predominantly in turbo systems with steam and gas turbines, and also with compressors, blowers and pumps. In addition, planetary gears are also suitable for high-speed test stands and even for hydroelectric power stations.

E-Pack planetary gear unit type RTP

RH series planetary gear unit

RT series planetary gear unit

RTG series planetary gear unit

RTP series Speed-Pack planetary gear unit

RTPK series planetary gear unit

The coaxial design of a planetary gear unit keeps the base frame dimensions to a minimum. Because the load is distributed over three or more planetary wheels, planetary gears are very compact, and lighter than parallel shaft gears for the same duty.

Different gear designs are used to achieve uniform power distribution. Since 1932, BHS has been building planetary gears of the Stoeckicht type. In this design, the sun wheel and the internally-geared wheel (annulus) are unsupported, and automatically take up the optimum positions between the planetary gears. The sun, which forms the high-speed side of the gearbox, is connected to the driver or driven unit by a coupling. The annulus is connected to the slow-speed shaft by a differential element. The fact that the sun has no bearing explains the high efficiency of BHS planetary gears.

BHS builds planetary gears for outputs up to 40 MW, speeds of up to 80,000 rpm and torques of up to 500 kNm. BHS offers three types of planetary gearbox: free-standing, flange-mounted on the high-speed side (Speed-Pack), and flange-mounted on the slow-speed side (E-Pack).

It is also possible to incorporate the coupling on the low-speed side within the gearbox. Since this design includes the couplings on both the driver and the driven side, as well as the coupling casings, it is very compact.

Technical demands on rotating machines are increasing steadily. To offer the most compact dimensions with transmission ratios up to 80, BHS has included new solutions in its product range, while established designs have been optimised to accommodate high power (1 MW) at high speeds (>100,000 rpm).