In Russian history, Bolshoi Theatre at Moscow is an inevasible structure from the 19th century onwards. This is one of the popular world heritage sites that has attracted people from all walks of life. In the beginning, it was the private theatre of the Moscow proseсutor Prince Pyotr Urusov. There were many major rebuilding and renovation works carried on in this theatre for improving safety, appearance, and accommodating capacity. Here we are going to discuss the outcome of 6 year’s painstaking restoration work completed in 2011.
It is the ultra-modern stage control system installed by Bosch Rexroth in Bolshoi Theatre. The control system used hydraulic, electromechanical, and hybrid drives for fast movements, high speed, withstanding large loads, quieter operation and for reducing heat. The Bosch Rexroth AG supply, assemble and commission 600+ hydraulic and electric drives for the upper stage and lower stage machinery.
What are the peculiarities of the Bolshoi theatre stage?
Bosch Rexroth AG has a dedicated team for improving stage infrastructure and safety with the help of different drives. The double-deck platforms, quickly & smoothly changing backdrops, movable floors, platform lifts, lighting hoists, portable bridges, and other stage decorations makes Bolshoi theatre unique. Quieter operation is the main advantage of hydraulics employed in this stage control system. Also, sensors and software functions in the stage control system protects the stage from safety risks.
The 520 square meters main stage(lower stage) is divided into 7 double-deck podia with tiltable covers, each having 22m long, 3m wide and 10m high. Each podium weighs about 70 tons. During the renovation works, the external dimension remains unchanged and a separate room was built for handling stage technology. To safeguard the stage, a 20m deep stage pit is used for holding the stage platform.
Also Read: Examples of Hydraulic System
The double-deck stage will have separate features for the upper stage and lower stage. We can discuss a few details related to upper stage machinery and lower stage machinery here.
Other than the 7 double-deck podia, the lower stage contains five orchestra pit elevator, one tiltable forestage, two-stage lifts, one dancefloor wagon and more. The 7 podia in the lower stage can be hoisted to a height of 16m in a speed up to 0.7m per second without any jolts or shocks. The jerk-free lifting and hoisting operations provide safety and comfortability to the performers.
The upper stage machinery includes bar hoist winches, point hoist winches, portable lighting bridge, portable towers, motor cable reels, etc.. The drives in the upper stage will assist to raise or lower up to one-ton load with a speed of 1.8 meters per second.
Also, Read: Basics of Hydraulics
The hydraulic station will contain a 50,000 liters oil tank and a nitrogen station of 58,500 liters. The system operates with a maximum pressure of 180 bar and a flow rate of 9000 l/min.
There are numerous advantages of using compact hydraulic drives for the stage control mechanism. Ease of installation, low energy costs, reduced downtime, minimum maintenance, and ease of upgrading are some of the important benefits.