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提升机在安全制动过程中,为了防止事故发生,需要有足够的制动减速度,即a≥1.5m/s~2。另一方面,为了防止激烈的振动、冲击造成新的设备或人身事故,又要求制动减速度有个上限,即a≤5m/s~2。对于摩擦式多绳提升机,还要求安全制动时钢丝绳不得在摩擦衬垫上发生滑动。这些就是《煤矿安全规程》第383条所规定的。第一个规定容易实现,只要有一套可靠的安全制动装置能提供足够的制动力矩就行了。为了实现第二个规定,提出了二级制动的要求,即施闸制动时,先产生对应于技术要求所规定的那个减速度的制动力矩M_j,停车后再获得最大制动力矩,即对应于3倍最大不平衡负荷的制动力矩M_m。根据不同的提升机及负荷情况,一般M_1≈(0.4～0.6)M_m,可根据动力学计算确定之。为了实现二级制动,在提升机制动系统液压站上采取了多种措施。我国较为通用的缠绕式提升机盘形制动器用液压站,是在安全阀上设置一螺线阀,使半数的制动器在安
Hoist in the safe braking process, in order to prevent accidents, the need for adequate braking deceleration, that is a ≥ 1.5m / s ~ 2. On the other hand, in order to prevent violent vibration, the impact of the new equipment or personal accident, but also require braking deceleration has an upper limit, that a ≤ 5m / s ~ 2. For frictional multi-rope hoist, but also requires safe braking rope should not slip on the friction pad. These are the “Coal Mine Safety Regulations” Article 383 of the provisions. The first rule is easy to implement, as long as a reliable safety brake can provide adequate braking torque. In order to realize the second regulation, the requirement of second-level braking is put forward, that is, when the brake of brake is applied, the braking torque M_j corresponding to the deceleration demanded by the technical requirement is generated first, then the maximum braking torque is obtained after stopping, That is, a braking torque M_m corresponding to three times the maximum unbalanced load. According to different hoist and load conditions, the general M_1 ≈ (0.4 ~ 0.6) M_m, can be determined according to the kinetics. In order to achieve two-stage braking, a variety of measures have been taken on the brake system of the hoist brake system. China’s more common winding hoist disc brake hydraulic station is set in the safety valve on a spiral valve, so that half of the brake in safety