动态模拟橡胶弹簧的振动筛配套设备

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动态模拟橡胶弹簧的振动筛配套设备JOURNAL OF COAL SCIENCE & ENGINEERING
(CHINA) DOI 10.1007/s12404-011-0215-0
pp 187–191 Vol.17 No.2 June 2011
Dynamic simulation on rubber spring supporting equipment of vi-
brating screen
∗

SU Rong-hua， PENG Chen-yu
School of Mechanics and Engineering， Liaoning Technical University， Fuxin 123000， China
© The Editorial Office of Journal of Coal Science and Engineering (China) and Springer-Verlag Berlin Heidelberg 2011

Abstract By ANSYS， dynamic simulation analysis of rubber spring supporting equipment used in vibrating screen was made.
The modal frequency， mode， and harmonic displacement under working frequency were obtained. Variation of rubber spring
supporting equipments dynamic performance was discussed first， which is under the condition of existing spring stiffness dif-
ference and exciting force bias. Also， the quantitative calculation formulas were given. The results indicate that the perform-
ance of vibrating screen is closely related with rubber spring supporting equipments dynamic performance. Differences of
springs stiffness coefficients reduce the modal frequency reduced， decrease the dynamic stiffness， and increase vibration dis-
placement. Exciting force bias induces a larger lateral displacement. When rubber springs stiffness coefficients exist， differ-
ences and lateral force accounts for 5% in total exciting force; rubber spring supporting equipments side swing is larger than
1 mm， exceeding the side swing limit.
Keywords vibrating screen， rubber spring， dynamic simulation analysis， harmonic response


Received: 8 December 2010
Supported by the National Key Technology R&D Program during 11th Five-Year Plan Period (2006BAA01B05)
E-mail: suronghua2006###163.com

Introduction
Rubber spring supporting equipment is widely used
in vibrating screen. Its main function includes two
aspects: one is for supporting vibrating screen body
and making machine body implement the needed vi-
bration. The other is to decrease dynamic load trans-
ferred into foundation or structure frame. The equip-
ment is mainly made up of rubber springs， base， and
support head seats. Rubber spring is a type of vibra-
tion control component using rubbers elastic defor-
mation to realize springs role. It is a kind of poly-
meric elasticity. Nowadays， vibrating screen generally
works in super resonance point， the frequency ratio of
forced vibration is 2.55.0， that means， and forced
vibration frequency is 2.55.0 times as natural fre-
quency. Therefore， effective damping of rubber spring
is needed to reduce the resonance， when vibrating
screen structure is in starting up and shutdown process
(Zhang and Tang， 2000; Liu et al.， 2007; Li， 2008).
Existed studies on rubber spring at home and abroad
indicate that rubbers effective damping can control
amplitude of low-frequency resonance without using
absorber. Additional benefit of internal damping is that
it can decay the peak and each value of wave response.
Rubbers dynamic characteristic makes it have much
wider vibration isolation frequency range and much
lighter weight than steel spring with same characteris-
tic (Lee et al.， 2003; Kim et al.， 2004). The research of
rubber springs used in vibration screening equipment
mainly aims at vibration isolation at present. In gen-
eral， only geometry size and static stiffness are given
in the product characteristic instruction. The research
on dynamic performance of rubber spring supporting
equipment is few. It is difficult to fulfill the dynamic
design requirement (Zhang， 2004; Gao， 2005; Yang
and Huang， 2005; Bao et al.， 2008).
By ANSYS， dynamic analysis of rubber spring
supporting equipment used in vibrating screen is made.
The modal frequency， vibration mode， and harmonic
displacement under working frequency are obtained.
The influence on rubber spring supporting equip-
ments vibration performance is analyzed when the
rubber springs have stiffness differences， and exciting
force has bias.
1 Finite element model
Rubber spring supporting equipment of ZK3048