counter-pressure

counter pressure

逆气制动：逆气制动是蒸汽机车的动力制动方式，用驱动机车汽缸的方式制动。它可以减少驱动轮轮胎及机车汽缸的摩损和过热，同时提供高制动力。制动作用的原理是将汽缸当作空压机，将动能转换为热能。

1
背压
... counter-pressure cylinder 计数压力柱面 counter-pressure 背压 counter-pressure turbine 对压式涡轮机 ...
2
差压
差压

短语

1
An inside corner in which a climber can use counter-pressure on each side to climb it.
攀爬有内角的岩壁时，攀登者可以利用两侧岩面的反作用力来攀爬。也指“打开的书”地形。
2
First opens the by-pass valve counter-pressure, then operates the valve, latter opens the hydraulic turbine.
先开启旁通阀平衡压力，再开阀，后开启水轮机。
3
The effect of counter-pressure casting parameters on secondary dendrite arm spacing (SDAS)of A357 alloy was studied.
研究了差压铸造不同工艺参数对A357合金二次枝晶间距的影响。

Counter-pressure
The counter-pressure brake (German: Gegendruckbremse), also named the Riggenbach counter-pressure brake after its inventor, Niklaus Riggenbach, is a dynamic railway brake on steam locomotives that brakes the locomotive using the driving cylinders. In doing so it reduces wear and tear and overheating of the driving wheel tyres and brake blocks and enables a continuously high brake force to be applied. The brake works by using the cylinders as air compressors and converting kinetic energy into heat. Steam is emitted during braking but this does not come from the boiler, it is produced by evaporation of water used to cool the cylinders.The main part of the system is piping and regulation of atmospheric air drawn into the cylinders, into which cooling water and oil is injected.

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