Fluid Coupling

Shenyang Juli Engineering Co., Ltd keeps good business relationship with Guangdong Zhongxing Power Transmission Co., Ltd for many years, has sold Zhongxing fluid couplings to several overseas clients in Pakistan, the United Arab Emirates and etc. The popular YOP and YOX series fluid couplings adopt the most ideal cavity structure and produced according to "GB/T5 837-1993 Types and Basic Parameters of Fluid Coupling". With the advantages of reasonable design, compact structure, reliable operation, significant energy-saving effect, no leakage, good application, Zhongxing fluid couplings have reach international state-of-the-art level.

The coupling supplies can be divided into different types: outer wheel (pump wheel) drive type, inner wheel (turbine) drive type; single-cavity type, double-cavity type; as well as types with brake wheels or with pulleys, etc.

1. Advantages of torque-limited fluid coupling

◆ Improve the starting capability of squirrel cage motors, use motor peak torque as starting torque to avoid overloading problem.

◆ Shorten motor starting time and reduce starting current during this process.

◆ Prevent power overload, thus protect the motor from the damage caused by it.

◆ Reduce vibration and impact during starting.

◆ In multi-drive, it can ensure the motors to start separately, realize power balance, and provide a starting torque limited to 1.2~1.6 times the rated torque as starting torque.

◆ Have simple and reliable structure, rare mechanical wear, thus no special maintenance required.

◆ Stand harsh working environment.

2. Applications

Widely used on various equipment, such as: belt conveyor, scraper conveyor, chain conveyor, screw conveyor, bucket elevator, bucket wheel stacker, coal mill, ball mill, crusher, bridge crane, portal crane, tower crane, rotary drum machine, washing machine, wire drawing machine, rubber mixing mill, boiler slag crusher, centrifuge, amusement machine, etc, in the electric power plant, steel plant, metallurgy, mining, building materials, chemical industry, port, lifting, transportation, engineering machinery and many other industries.

3. Characteristics

(1) Types, varieties and specifications of torque-limited fluid couplings:

◆ According to the transmission medium: mineral oil type or water-filled type, the installation axial lengths are the same, the parts can be interchangeable.

◆ According to the driving form: outer wheel (pump wheel) drive--YOX series; inner wheel (turbine wheel) drive--YOXn series.

◆ According to cavity type: single cavity type --YOX series; double cavity type --YOXD series.

◆ Structural classification by starting time: YOP series without rear auxiliary chamber; YOX series of ordinary type; YOXV series with extended rear auxiliary chamber; YOXvvs series with extended rear auxiliary chamber and enlarged side auxiliary chamber.

◆ According to the transmission characteristics: YOXP series with pulleys; YOXIIZ and YOXNZ series with brake wheels.

◆ According to the disassembly mode: YOXA series with elastic sleeve pin coupling type.

(2) Characteristic curve (when filling rate Qc=80%)

◆ Figure 1: combined starting characteristic curve of the motor and fluid coupling.

◆ Figure 2: original characteristic curve of the fluid coupling's starting process

◆ Figure 3: starting time and process curve of the motor and fluid coupling.

(3) Model

The fluid coupling model is in accordance with GB/T5837-2008 .

1.The couplings that are driven by external wheels and using mineral oil as working medium are not remarked by any code or letter.

2. Model: