Fluid Coupling

Córdoba Fluid Coupling for Sale

A fluid coupling is composed of two main components: the pump and the turbine, with angled blades inside. The pump is attached to the drive shaft, while the turbine is connected to the driven shaft. As fluid enters the pump, the drive shaft rotates due to centrifugal force. When a reactor is added, the fluid coupling becomes a torque converter. This system is commonly used in industrial and marine applications.

Fluid Coupling Characteristics

Enhance the starting performance of electric motors, providing protection against overload conditions, while also absorbing shocks, load fluctuations, and torsional vibrations. Additionally, it ensures smoother load distribution and better balance, particularly in systems with multiple motor drives. This results in improved motor efficiency, longevity, and overall system reliability.

Types of Fluid Couplings

Fluid couplings come in two main types: constant fill and variable fill. Constant fill couplings provide a fixed torque, while variable fill couplings offer adjustable torque. The constant fill fluid coupling is known for its user-friendly, maintenance-free operation, and can also regulate slip. Variable speed versions are available, and constant fill types are widely used to manage torque during acceleration in various applications.

With several manufacturers offering fluid couplings, selecting the right one depends on your specific needs. HZPT, a leading fluid coupling manufacturer in China, provides durable and affordable fluid couplings. Contact us today for more information.

Fluid Coupling Specifications

　Selection power table (KW)

SELECTION:

Without special requirements, the following technical data sheet and power chart are used to select the proper size of fluid coupling with oil medium according to the power transmitted and the speed of the motor,e, i, the input of the fluid coupling.
When ordering, please specify the dimensions of the shaft ends of the motor and driven machine(or reducer), including diameter, tolerance or fit of the shafts(if no tolerance or fit is specified, the bores will be machined th H7), fit length of the shafts, width, and depth of the keys (of notice the standard No.enforced). For ordering the fluid couplings with belt pulley, brake pulley or other special requirements, please state the technical data in detail.YOXz is a coincidence machine with a moving wheel which is in the output point of the coincidence machine and is connected with an elastic axle connecting machine (plum blossom type elastic axle connecting machine or elastic pillar axle-connecting machine or even the axle-connecting machine designated by customers). Usually there are 3 connection types.
YOXz is inner wheel driver which has a tight structure and the smallest axle size. The fittings of YOXz have a wide usage and simple structure and the size of it has basically been unified in the trade. The connection style of YOXz is that the axle size of it is longer but it is unnecessary to move the electromotive machine and decelerating machine. Only demolishing the weak pillar, and connected spiral bolt can unload the coincidence machine, so it is extremely convenient. The customer must offer the size of the electromotive machine axle (d1 L1) and decelerating machine axle (d2 L2). The wheel size (Dz Lz C) in the table is just for reference; the actual size is decided by customers.

Select Table of YOXz YOXzⅡ YOXzⅢ Fluid Couplings Size and Specification

Select Table of YOXp Type Fluid Couplings Size and Specification

Attention： the smallest size Dp belt tray can do the largest size the dl axle hole can do YOXp type is a connection style of belt tray with hydraulic coincidence machine. The electromotive machine (or decelerating machine) axle directly inserts in the axle hole of the coincidence machine, which is suitable for equipment transported by belt.The customer must supply the connection size of the electromotive machine axle (d1 L1) and the detailed specification and size of the belt tray.

Select Table of YOXm Type Fluid Couplings Specification and Size

Attention：L in the table is the smallest axle size.If lengthen the L1,the total length of L will be added.d1,d2are the largest size that we can do.

Select Table of YOXe YOXf Fluid Couplings Specification and Size

YOXf is a type connected both sides, the axle size of which is longer. But it has simple structure and it is more easy and convenient for fixing and amending (unnecessary to move the electromotive machine and decelerating machine but only the elastic pillar and connecting spiral bolt can unload the coincidence machine).
The relevant elastic axle connecting machine, connecting size and outer size is basically the same with YOXe type.

Applications of Fluid Couplings

Fluid couplings are widely used in various applications, including belt conveyors, scraper conveyors, bucket elevators, ball mills, hoisters, crushers, excavators, mixers, straighteners, and cranes. They play a crucial role in power transmission across different types of conveyors and heavy machinery.

The use of fluid couplings offers several benefits, such as energy savings, overload protection, smooth acceleration, and torsional isolation, making them especially valuable in heavy industrial environments. In marine applications, fluid couplings are commonly found in large ventilators, mixers, and boiler feed pumps. By incorporating fluid couplings into your systems, you can extend equipment lifespan and minimize downtime, enhancing overall operational efficiency.

Advantages and Disadvantages of Fluid Couplings

Hydrodynamic fluid couplings offer several advantages and disadvantages. One key limitation is that they may restrict the torque transmitted by the motor, as the output torque decreases when the input and output angular velocities match.

On the positive side, fluid couplings provide excellent mechanical shock absorption, which is crucial in applications dealing with shock loads. For example, mining conveyors that transport hundreds of tons of material daily benefit from this, as it reduces wear and tear on the drive system.

Another advantage is the soft-start feature of fluid couplings, which minimizes stress on machinery and prevents damage. They also allow the transmission of maximum possible torque under appropriate conditions.

However, fluid couplings do have some drawbacks, including the need for regular maintenance. This involves checking the fluid levels, inspecting components, and possibly adjusting the fluid viscosity based on load and operating conditions. The type of fluid used may vary depending on these factors and the design of the fluid casing.

Fluid Coupling VS Torque Converter

The choice between a fluid coupling and a torque converter depends on multiple factors. For instance, a torque converter that is under-filled won’t be able to transmit the full torque to the wheels, limiting its effectiveness. Additionally, fluid couplings experience slippage under load, which significantly reduces efficiency. This loss becomes even more noticeable during stop-and-go driving, where torque converters operate in their least efficient range, often harming fuel economy.

Torque converters tend to be more efficient at low speeds, with their efficiency increasing as the input and output shaft speeds rise. However, at highway speeds, they can’t match the efficiency of fluid couplings. Minor variations in the shape of turbine blades within a fluid coupling can lead to noticeable differences in performance, further impacting the overall efficiency of the system.

Another aspect of torque converters is their ability to provide mechanical advantage similar to gear multiplication, although they cannot achieve 100% power transmission efficiency. The stator, an additional element in the torque converter, plays a crucial role in directing fluid flow. Torque converters are commonly used in light vehicles and automatic power systems, where they are typically bolted to the input shaft of transmissions and often work in conjunction with gear units.