Hydraulic Coupler, also known as a Fluid Coupling, is a hydraulic transmission device used to connect a power source (usually an engine or motor) with a working machine. It transmits torque through changes in the fluid momentum.
Product Advantages
- Flexible Transmission: Automatically adapts to changes.
- Impact Dampening and Isolation of Torsional Vibration: Helps reduce shock and isolate torsional vibrations.
- Improved Starting Capability: Enhances the motor's ability to start with or without load.
- Overload Protection: Protects the motor and working machine from damage during overload conditions.
- Coordinated Multi-Engine Starting: Ensures sequential startup, load balancing, and smooth synchronization of multiple motors.
- Flexible Braking and Deceleration: Includes hydraulic deceleration and damping types of fluid couplers.
- Delayed Start Function: Enables smooth start-up of machines with large inertia.
- Strong Environmental Adaptability: Works effectively in cold, humid, dusty, and explosion-proof environments.
- Cost-Effective Motor Replacement: Allows the use of inexpensive cage-type motors instead of costly wound-rotor motors.
- Environmentally Friendly: No pollution to the environment.
- Power Transfer Efficiency: Power transfer is proportional to the square of input speed, offering higher capacity and better performance-to-price ratio at higher speeds.
- Infinitely Variable Speed: Speed-regulating fluid couplers can adjust output torque and speed by varying the fluid level in the working chamber, while the input speed remains constant.
- Clutching Function: Speed-regulating and clutch-type fluid couplers allow the working machine to start or brake without stopping the motor.
- Expanded Stable Operating Range: Increases the stable operating range of the motor.
- Energy-Saving Effect: Reduces motor startup current and duration, minimizes grid impact, reduces motor capacity requirements, and significantly saves energy in applications with large inertia or centrifugal machinery.
- Low Failure Rate and Long Service Life: With no direct mechanical friction except for bearings and seals, these couplings have a low failure rate and long service life.
- Simple Structure and Easy Maintenance: The structure is simple and maintenance is easy, requiring no complex technology and low maintenance costs.
Product Parameters
| Structure Code |
Design Features |
| YOX / YOXII |
Regular Extension Cavity |
| YOXY |
Extended Rear Cavity |
| YOXYS |
Extended Rear Cavity + Increased Cavity |
| YOXIIZ / YOXZL |
Basic Design + Drive Wheel |
| YOXIIZ***A |
External Wheel Drive + Drive Wheel |
| YOXYZ |
Extended Rear Cavity + Drive Wheel |
| YOXYSZ |
Extended Rear Cavity + Increased Cavity + Drive Wheel |
| YOXE |
Can Be Disassembled |
| YOXYE |
Can Be Disassembled + Extended Rear Cavity |
| YOXYSE |
Can Be Disassembled + Extended Rear Cavity + Increased Cavity |
| YOXEZL |
Can Be Disassembled + Drive Wheel |
| YOXYEZ |
Can Be Disassembled + Drive Wheel + Extended Rear Cavity |
| YOXSEZ |
Can Be Disassembled + Drive Wheel + Extended Rear Cavity + Increased Cavity |
| YOXR / YOXL |
Basic Design + Belt Wheel |
| YOXSQ / YOXD |
Double Filled Cavity (Efficiency Enhanced) |
| YOXF |
Composite Filled Cavity |
| YOXFZ |
Composite Filled Cavity + Drive Wheel |
The material strength of the main components of the fluid coupling determines its maximum allowable speed. After preliminarily estimating the size of the fluid coupling based on power data, the coupling design and type need to be determined according to the application conditions.
Finally, the thermal load of the fluid coupling needs to be verified. Typically, during each startup with slip, at least half of the energy is converted into heat. Therefore, thermal capacity and heat dissipation are important factors in correctly selecting a soft start fluid coupling. The characteristic curves of different fluid coupling designs vary significantly, determining the different starting characteristics of the fluid couplings. For the vast majority of applications, the time characteristic curves of fluid couplings generally meet the operational requirements.
The working fluid is the medium used in the fluid coupling, which serves to transmit power and lubricate the bearings.
The working oil should have an appropriate viscosity, high density, stable performance, low acid value, high flash point, low pour point, and good lubrication properties.
Proper installation of the protective cover:
A protective cover (such as a metal plate with holes, with hole diameters around 10-12mm) should be installed on the fluid coupling, and it must meet the following requirements:
- Prevent destructive foreign objects (such as stones, metal chips, etc.) from entering.
- A certain safety distance must be maintained between the fluid coupling and the protective cover; they should not be too close.
- The cover should be able to catch any molten metal or leaking working fluid from the fusible plug, preventing contact with other parts (such as motors, belts) to avoid overheating and fire.
- The hole ratio of the protective cover should be at least 65%, ensuring sufficient ventilation to keep the fluid coupling's surface temperature below the specified maximum.
FAQ
Q1: Are you a manufacturer or a trading company?
A: We are a manufacturer specializing in international trade and direct sourcing.
Q2: Do you have stock?
A: Yes, we have stock for most standard products.
Q3: How do you control quality?
A: We have a very strict quality control system to ensure that our products always have the best quality.
Q4: What is your delivery time?
A: Usually, our delivery time is 15-25 days after the purchase order (PO) is confirmed, but it depends on the quantity for each inquiry.
Q5: What are your usual payment terms?
A: Typically, we require a prepayment and the balance to be paid before shipment, but we quote based on the customer, order, and other factors for each inquiry.
Q6: What are your delivery methods?
A: We usually use EXW, FOB, CIF, CFR, etc.
Q7: What is your main packaging mode?
A: Inner packaging: wooden reels, plastic reels, paper reels, shrink wrap; outer packaging: cartons, wooden cases, and pallets. Other packaging methods can be used upon customer confirmation.
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