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一、概述舞台机械是现代各类文化设施(剧院、剧场、俱乐部、体育场馆等)中不可缺少的基本设备。目前国内外剧院普遍使用的升降台中,比较成熟、使用效果较好的是液压缸斜置驱动的剪叉式升降台。在实际使用中这种升降台存在一些不足:①负载不能过大。因为液压传递动力是采用油缸(内设密封圈)进行传递的,用溢流阀和压力继电器等方法来进行过载保护,而超载的问题目前仍未解决好。②我国使用液压升降台的大部分剧场都存在着升降台下沉的问题,有的升降台在24小时内就下沉20mm左右,这给舞台工作人员带来了很多麻烦,甚至影响了演出的正常进行。造成这种下降的原因是液压元件长时间处于受载状态引起的泄漏,使升降台出现下沉现象。有些剧场采用了液压锁紧装置或机械锁紧装置来解决这个问题,但效果不很理想。
I. Overview Stage machinery is an indispensable basic equipment in all kinds of modern cultural facilities (theaters, theaters, clubs, stadiums, etc.). Currently used in theaters at home and abroad are generally more popular, the more mature, the better the use of hydraulic cylinder tilt-driven scissor lift. In actual use this lift there are some deficiencies: ① load can not be too large. Because the hydraulic power transmission is the use of fuel tanks (equipped with a ring) for transmission, with pressure relief valve and pressure relief valve and other methods for overload protection, and the overload problem is still not solved. ② In most of the theater where hydraulic lifting platform is used in our country, there is a problem that the lifting platform sinks. Some lifting platform sinks about 20mm in 24 hours, which brings a lot of trouble to the stage staff and even affects the performances Work properly. The reason for this decrease is the leakage of the hydraulic components due to prolonged loading, causing the lifting platform to sink. Some theater using hydraulic locking device or mechanical locking device to solve this problem, but the effect is not very satisfactory.