New GY Imported Replacement Limited-Torque Series

Technical Description

• **Abstract** This article provides a technical introduction to the technology and application examples of limited-torque hydraulic transmissions. The GY series technical standards represent a new enterprise standard developed by referencing and adapting German standards, primarily targeting overseas export projects as well as the domestic high-end 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 distinct advantages over the traditional YOX series:
  ● Adopt higher sealing technology standards
  ● Oil-free for three years
  ● The main shaft employs TS technology: key areas feature a surface roughness of ▽0.2 and a surface hardness exceeding HV600.
  ● The spindle processed by TS technology features a microscopic surface structure that forms an oil-retaining grid. To reduce the friction coefficient and enhance the dynamic sealing performance of skeleton oil seals.
  ● Adopt imported oil seals (temperature-resistant up to 200°C).
  ● Static seals (e.g., flanges) utilize a high-quality O-ring seal combined with specially formulated sealing adhesive (specifically designed for automotive transmission systems), providing a dual-layer sealing mechanism.

  

  
  ● Faster, stronger
  ● Utilizing high-quality bearings (SKF, FAG) for enhanced load-bearing capacity.
  ● Optional, professionally customized hydraulic transmission fluid can enhance power transmission by 5% to 15%.
  ● The rotating component is manufactured using dynamic balancing technology, ensuring more stable high-speed operation. The maximum operating speed is below 3000 rpm.

  

  
  ● Higher level of monitoring is achievable.
  ● Peripheral Infrared Temperature Monitoring Device
  ● Signal feedback can be integrated into centralized control.
  ● Conduct temperature monitoring to proactively identify overload trends.
  ● Contact capacity of alarm output: ~250V / 5A
  ● Output a 4–20mA signal corresponding to the output temperature.
  ● Temperature measurement range: 0~300℃
  ● Ambient temperature: 0~60°C. Relative humidity: 10~95% (non-condensing).
  ● Monitoring box dimensions: 300 x 250 x 150 mm, front-opening, wall-mounted design

  

  The dual-drive shredder used in the environmental protection project in Illinois, USA, features GY products equipped with infrared temperature monitoring systems.

   

  
  ● Higher vibration standard
  ● Advanced Manufacturing Techniques from Germany
  ● Vibration values can be as low as 2.5 mm/s.
  ● Reduce vibration during high-speed operation
  ● Reduce resonance in the drive unit
  ● Ensure the long-term, reliable operation of equipment such as motors, gear reducers, and conveyors.

  

  Supporting CMC's export to Malaysia's Manjung project, replacing the GY product originally supplied by Germany's VOITH.

  
  ● In addition to using spring washers, thread-locking adhesive is also applied for double security, ensuring enhanced safety.
  ● Aluminum alloy components are produced using the full-metal mold low-pressure casting technique, a technology that is domestically leading. Low-pressure cast aluminum alloy parts exhibit higher strength and more uniform material properties. The ZL104 aluminum alloy used complies with the GB/T 1173-1995 standard.
  ● Fasteners shall be standard components of Grade 8.8, treated with galvanization, black oxide coating, or Dacromet finish.
  ● The surface coating uses acrylic metallic protective paint that complies with the national standard GB/T25264—2010.

  

  GY Products Supporting MCC Sedi's Export Project to the Formosa Ha Tinh Steel Plant in Vietnam

  
  ● A better connection format
  ● GT High-Elastic Coupling (German Technology)
  ● Capable of flexible connection (permissible radial and axial displacement < 1 mm)
  ● Enhanced adaptability to overload and impact loads

  

  

  

  
  ◆ Technical Specification Sheet for GY-GT High-Elasticity Hydraulic Coupling Series
  ◆ The hydraulic coupling (hydraulic torque converter), which uses transmission oil as the medium for power transmission
  ◆ Should be equipped with a rear or 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″.
  ◆ Configurable temperature monitor for hydraulic couplings, featuring a 4–20 mA output.
  ◆ Configurable speed monitor for hydraulic couplings, outputting 4–20 mA signals
  ◆ In case of overload, it can relieve the load by melting the fusible plug and spraying oil (overload protection).
  ◆ The hydraulic coupling shall undergo dynamic balancing, with a grade of G6.3 (vibration value < 4.5 mm/s).
  ◆ Should be equipped with a highly elastic coupling (standard component) that offers excellent flexibility and superior load-bearing capacity for flexible connections.
  ◆ The replacement of the high-elastic coupling should be simple and convenient, without requiring the removal or movement of the prime mover and driven machine.
  ◆ Should be capable of withstanding 30% alternating torque over a long period.
  ◆ The hydraulic coupling shall be equipped with bearings of the same quality as those from FAG, SKF, and other reputable brands.
  ◆ The hydraulic coupling shall be equipped with a rubber dynamic seal capable of withstanding 200°C.
     ◆ Guangxing Brand Limited-Radius Fluid Coupling (Upgraded Import Substitution Version)
  ◆ Flexible Coupling (Torsional Vibration Isolation)
  ◆ Limited Torque Protection (Overrunning Clutch)
  ◆ Soft start (reducing inrush current and starting impact)
  ◆ Can be used for multi-drive applications