EP vibrating hammer unveiled at the East Taiwan Wind Farm

Shanghai Zhenzhong's resonance free vibration hammer has served China's wind power project for the fourth time, namely the Jiangsu Dongtai Luneng 200MW offshore wind power project, contributing to China's offshore wind power industry. On the vast sea, it showcases its infinite power. When it comes to our company's resonance free vibration hammer, colleagues have to give a thumbs up.

The EP series resonance free vibration hammer is a new generation of vibration pile hammer developed by our company in the 1990s in collaboration with Beijing Construction Mechanization Research Institute and Japan Jiandiao Co., Ltd., characterized by resonance prevention. In the early stages, this type of product was mainly exported to developed countries such as Japan and was hailed as the "Epoch hammer" of the new era. The Japanese Ministry of Construction (now the Ministry of Land, Infrastructure, Transport and Tourism) conducted testing and evaluation on this series of models and listed them as products for promoting new technologies. In China, this model product has won the first prize of the Ministry of Construction's Science and Technology Progress Award and was listed as a project for promoting and transforming scientific and technological achievements by the Ministry of Construction.

The EP series resonance free vibration pile hammer uses a hydraulic control eccentric torque conversion device, which allows the vibration hammer to continuously adjust the eccentric torque from zero to the optimal value during starting, stopping, and operation. Due to starting and stopping under zero eccentric torque, the occurrence of "resonance" is avoided, and the amplitude can be adjusted to adapt to changes in soil conditions, making it highly adaptable and widely applicable.

At present, our company has successfully developed a series of resonance free vibration hammers, including EP1600 (motor power: 1200kW, excitation force: 0-700t, eccentric torque: 0-1120kg. m) and EP1100 (motor power: 800kW, excitation force: 0-420t, eccentric torque: 0-560kg. m).

Perhaps in people's traditional beliefs, diesel hammers that "bang" and ordinary vibrating hammers that "bang" and "bang" are impressive, but in fact, low frequency resonance free vibrating hammers are used in many places. For example, the EP800 resonance free vibration hammer participated in the Rudong CGN wind power project. The vast and boundless sea, so small but exerting immense power. On this project, there is a hydraulic vibration hammer that is currently one of the best in the world (excitation force: 500t, eccentric torque: 230kg. m, total mass: 19236kg). According to construction statistics, our EP800 resonance free vibration hammer (excitation force: 350t, eccentric moment: 0-560kg. m, total mass: 59000kg) takes a total of 9 minutes to sink one pile and 7 minutes to pull out one pile. The hydraulic vibration hammer with an excitation force of 500t takes 30 minutes to sink a pile and 17 minutes to pull out a pile. Due to the large eccentric torque, hammer weight, and vibration impulse of the EP series resonance free vibration hammer, compared with high-frequency hydraulic vibration hammers, under the same conditions (equivalent excitation force or power), the construction efficiency has been improved by 40%. The final pile pulling effect has been highly recognized by customers, who have praised our company's high manufacturing and research and development level, and excellent product quality.

Our company's resonance free vibration hammer is also demonstrating its strength in other projects. For example, the construction of steel casing for the Qingshan Yangtze River Bridge in Wuhan, the construction of inclined piles in Tianjin Binhai, and the construction of wind power in the intertidal zone of Rudong, Jiangsu. Experiencing difficult projects not only tests the performance of our resonance free vibration hammer, but also accumulates knowledge on how our resonance free vibration hammer can better serve users in the future.