DESIGN THEORY OF AN ENERGY-SAVING PNEUMATIC POWER BRAKE MODE FOR MECHANICAL PRESS

ZHAO Shengdun¹  WANG Jun¹  HE Yupeng²  QUAN Zhongmin¹

(1. School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049；
2. College of Mechanical & Electrical Engineering, Henan Agricultural University, Zhengzhou 450002)

Abstract: Based on analyzing the disadvantage of material- and energy-wasting brake system in current mechanical presses, an energy-saving pneumatic power brake mode for mechanical press is proposed and the working principle is discussed. By analyzing the working process of the energy-saving pneumatic power brake system, the gas energy equation, flow continuity equation, gas state equation and the cylinder braking dynamics equation are established. By analyzing the gas thermodynamic characteristics in brake cylinder with the energy-saving pneumatic power brake mode, calculation formulas of both braking force and power in braking process are obtained. An energy-saving pneumatic power brake device for 630 kN mechanical press JH23-63 is researched and developed, and the correctness, practicability and reliability of mathematic model are tested and validated.

Key words: Mechanical press Energy-saving Brake Pneumatic power

CLC No: TG315.5

国家自然科学基金资助项目(50575175). Received 20060911, received in revised form 20070426