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New GY Import-Substitution Limited-Torque Series
Technical Note
- [Abstract] This article provides a technical introduction to the technology and application examples of limited-torque hydraulic transmissions. The GY series technical standards are new enterprise standards that have been developed by referencing and adapting German standards, primarily targeting overseas export projects as well as the high-end domestic market for import substitution.
[ Keywords 】 Soft start, flexible coupling, semi-clutch, torque limitation, overload protection, damping
The GY series adopts German technical standards and offers advantages over the traditional YOX series:
● Adopt higher sealing technology standards
● No oil leaks for three years.
● The spindle adopts TS technology: surface roughness of critical areas ▽0.2, surface hardness > HV600.
● The spindle treated with TS technology features a microscopic oil-retention grid formed on its surface. For skeleton oil seals, reduce the coefficient of friction and enhance dynamic sealing performance.
● Uses imported oil seals (temperature resistance up to 200℃)
● Static seals (such as flanges) employ a dual sealing system consisting of high-quality O-rings and specially formulated sealant (specifically designed for automotive transmissions).
● Faster, stronger
● Uses high-quality bearings (SKF, FAG) with greater load-carrying capacity.
● Selecting a professionally customized hydraulic transmission fluid can increase power transmission by 5% to 15%.
● The rotating assembly employs a dynamic balancing process, ensuring greater stability at high speeds; its maximum operating speed is below 3000 rpm.
● Higher degree of monitorability
● Peripheral infrared temperature monitor
● Signal feedback can be integrated into centralized control.
● Perform temperature monitoring to detect overload trends in advance.
● Contact capacity of the alarm output: ~250V/5A
● Can output a 4–20mA signal corresponding to the temperature.
● Temperature measurement range: 0~300℃
● Ambient temperature: 0~60℃. Relative humidity: 10~95% (no condensation).
● Monitoring box external dimensions: 300*250*150, front-opening wall-mount type.
The dual-drive shredder used in the environmental protection project in Illinois, USA, features GY products equipped with infrared temperature monitoring.
● Higher vibration value standard
● Germany's advanced technology
● The vibration value can be as low as 2.5 mm/s.
● Reduce vibration during high-speed operation.
● Reduce resonance in the drive section.
● Ensure the long-term, normal operation of equipment such as motors, gear reducers, and conveyors.
The配套 CMC is replacing the German VOITH GY product in the Manjung project for export to Malaysia. product
● In addition to using spring washers, thread-locking adhesive is also applied for double security and enhanced reliability.
● Aluminum alloy components are produced using full-metal mold low-pressure casting, a technology that is domestically leading. Aluminum alloy components cast by low-pressure methods exhibit higher strength and more uniform material properties. The alloy used complies with the standard GB/T 1173-1995, specifically ZL104 aluminum alloy.
● The fasteners are standard components of Grade 8.8, treated with galvanization, black oxide coating, or Dacromet.
● The surface coating uses acrylic metal protective paint that complies with the national standard GB/T25264—2010.
GY products supporting the MCC Sedi export project to the Formosa Ha Tinh Steel Plant in Vietnam.
● Better connection form
● GT High-Elastic Coupling (German Technology)
● Capable of flexible connection (permissible radial and axial displacement < 1 mm)
● Stronger adaptability to heavy-duty and impact loads.
◆ GY-GT High-Elastic Series Hydraulic Coupling Technical Specification Book
◆ Hydraulic coupling (hydraulic torque converter) that uses transmission oil as the medium for power transmission
◆ It should be equipped with a rear auxiliary chamber or a side auxiliary chamber capable of cushioning the impact during startup of the working mechanism.
◆ Meets the soft-start requirements for the rated load of the working machine, with a maximum start-up time of 20″ to 50″.
◆ Temperature monitor for configurable hydraulic couplings, with 4–20 mA output signal.
◆ Configurable speed monitor for hydraulic couplings, with 4–20 mA output signal.
◆ In the event of an overload, the fusible plug melts to relieve the oil pressure and unload (overload protection).
◆ The hydraulic coupling shall undergo dynamic balancing to a grade of G6.3 (vibration value < 4.5 mm/s).
◆ It should be equipped with a highly elastic coupling (standard component) that offers excellent flexibility and load-bearing capacity.
◆ The replacement of the high-elasticity coupling should be simple and easy, without requiring the movement of either the prime mover or the driven machine.
◆ It should be able to withstand a 30% alternating torque for an extended period.
◆ The hydraulic coupling should use bearings of the same quality as those from FAG, SKF, and other reputable brands.
◆ The hydraulic coupling should use a rubber dynamic seal capable of withstanding 200℃.
◆ Guangxing Brand Limited-Torque Hydraulic Coupling (Upgraded Import Substitution Version)
◆ Flexible coupling (isolating torsional vibration)
◆ Limited torque protection (overrunning clutch)
◆ Soft start (reduces inrush current and starting surge)
◆ Can be used for multi-drive.
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