An inner and outer pressure difference within 0.3 MPa
for disc cutters guarantees the effectiveness of their floating seals in high
water pressure environments reaching 1.4 MPa. Thus, an adaptivebalancing
structure should be designed and developed to reduce the pressure difference
upon the disc cutter. The piston balance valve frequently leads to floating
seal failure of the disc cutter due to rock slag blockage in highpressure environments or rapid wear of the Oring seal. Therefore, an adaptivebalancing rubber sleeve is designed to adaptively adjust the inner
pressure of the disc cutter according to the outer pressure by elastic
deformation of the airbag, realizing a dynamic pressure following the function
of the disc cutter to the outer pressure. First, the adaptivebalancing mechanism of the rubber sleeve is studied based on
theoretical analysis, and the performance evaluation method of the rubber
sleeve is given based on combining simulation and theoretical analysis. Then,
the optimal structural parameters are given based on the sensitivity analysis
of the sleeve, the performance of an isodiametric rubber sleeve is
experimentally studied, and the results show that the inner and outer pressure
difference of the disc cutter is ~0.12 MPa under an input pressure of 0-0.6
MPa. Finally, the designed rubber sleeve was successfully applied to a shield
tunneling project, achieving a good operation effect with disc cutters.
LI Yingfa
,
CHEN Yantao
,
JIANG Haifeng
,
ZHANG Yaoxin
,
ZENG Jing
,
LI Huanxu
,
WANG Biao
,
ZHANG Guopeng
. Adaptive Balancing Characteristics of a Rubber Sleeve
for Shield Disc Cutters in High Water Pressure Conditions[J]. Tunnel Construction, 2024
, 44(4)
: 705
-711
.
DOI: 10.3973/j.issn.2096-4498.2024.04.009
