XCMG Kaigong Heavy Industry Shield Tunneling Machine NG Rubber Compensators Contract Case

Introduction to XCMG Kaigong Heavy Industry

XCMG Kaigong Heavy Industry Nanjing Co., Ltd., established in February 2011, is located in Jiangning Riverside Economic Development Zone, Nanjing. With a registered capital of 188.02 million yuan and a workforce of 120 employees, including 29 engaged in R&D, the company specializes in the research, development, manufacturing, sales, and service of large-scale tunnel boring machines. XCMG Kaigong Heavy Industry has developed a localized production model integrating production, research, and key component procurement. Led by Su Yanqi, the legal representative and senior engineer, the company boasts the strongest shield tunneling machine R&D and design team in China. They actively collaborate with XCMG Research Institute, Dalian University of Technology, Zhejiang University, Tongji University, China University of Mining and Technology, and Hohai University to tackle core technical challenges and solve various problems in R&D and production.

XCMG Kaigong Heavy Industry adheres to the philosophy of independent research and development and mastering core technologies, striving to build a national brand in the shield tunneling industry. Their tunnel boring machines have been applied in various projects and have earned honors such as Jiangsu Province Private Technology Enterprise, Technology-based Small and Medium-sized Enterprise, and Contract-abiding and Trustworthy Enterprise. Their products have also received accolades like “Jiangsu Province First Set of Major Equipment,” “Jiangsu Province Excellent New Product Gold Award,” and “Jiangsu Province High-tech Product.” The company’s credit rating is AA.

Shanghai Songjiang Group’s NG Oil-resistant Rubber Compensators

Under the current contract, Shanghai Songjiang Group has supplied XCMG Kaigong Heavy Industry with NG-type oil-resistant rubber compensators. These products, made from oil-resistant rubber, are model K16S-63DN65PN16 and possess the following features and advantages:

High Pressure Resistance: The NG rubber compensators can withstand high-pressure environments, ensuring safe and reliable operation in high-pressure pipeline systems.
Excellent Elasticity: The rubber material endows the compensators with excellent elasticity, effectively absorbing vibrations and shocks generated by mechanical equipment.
Large Displacement Capacity: This product allows for significant displacement, balancing pipeline deviations and accommodating various displacements and deformations in the pipeline system.
Vibration Absorption: By absorbing vibrations, the compensators reduce noise, enhance workplace comfort, and minimize equipment wear and tear, thereby extending equipment lifespan.
Easy Installation: The lightweight design facilitates easier installation and maintenance, reducing labor intensity and improving work efficiency.
Corrosion, Wear, and Aging Resistance: The external rubber part, treated with vulcanization, boasts excellent corrosion, wear, and aging resistance, making it suitable for various harsh environments.
Superior Oil Resistance: The internal rubber part, made from nitrile rubber (NBR), has excellent oil resistance, maintaining stable performance in oil-contact environments.
Application of NG Oil-resistant Rubber Compensators in Shield Tunneling Machine Production

In the production process of shield tunneling machines, the stability and durability of the pipeline system are crucial. Various hydraulic equipment, oil pressure systems, and other auxiliary equipment need to operate smoothly during production, avoiding damage caused by vibrations and stresses. NG rubber compensators play a key role in these production stages.

Vibration and Noise Reduction: During the production of shield tunneling machines, various mechanical equipment and hydraulic systems generate vibrations and noise. The high-elasticity rubber material of the NG rubber compensators effectively absorbs and isolates these vibrations and noises, protecting equipment and the production environment, and reducing noise impact on workers.
Adaptation to Equipment Displacement and Deformation: During production, vibrations and temperature changes cause displacement and deformation in the pipeline system. The high-displacement design of the NG rubber compensators adapts to these changes, preventing damage due to stress concentration and extending the equipment’s lifespan.
Oil and Corrosion Resistance: The production process of shield tunneling machines often involves contact with various lubricating and hydraulic oils. The internal nitrile rubber of the NG rubber compensators offers excellent oil resistance, while the external vulcanized rubber layer provides superb corrosion and wear resistance, ensuring stable performance under harsh conditions.
Convenient Installation and Maintenance: The lightweight and compact NG rubber compensators are easy to install and maintain. Their design allows for flexible connections within the equipment and pipeline system, reducing labor intensity during installation and simplifying maintenance and replacement, saving time and costs.
Feedback and Application Results

Since the installation of NG oil-resistant rubber compensators provided by Shanghai Songjiang Group, XCMG Kaigong Heavy Industry has seen remarkable results. The high elasticity and oil resistance of the compensators have significantly enhanced the stability and durability of the equipment and pipeline system, reducing the impact of vibrations and noise on both equipment and personnel during production. Additionally, the convenient installation and maintenance have improved work efficiency and reduced maintenance costs. XCMG Kaigong Heavy Industry highly values this collaboration, acknowledging that Shanghai Songjiang Group’s products meet their quality and performance requirements, providing reliable support for their production and operations.