The working principle of boiler tubeexpander is elaborated and the formula for calculating the related parameters is derived in this paper according to the theory of mechanics of rigid body.
本文运用刚体力学理论阐明了胀管器的工作机理，并导出相关参量的计算公式。
2
The control part of tubeexpander adopts the structure of double bearings.
它的控制部分采用双轴承结构。
3
The principle of ultra - high pressure hydraulic tube expanding technology for liquid bag type expander is addressed in this article anddeveloping process for this new equipment has been discussed.