旋转接头将流体从固定供应源转移到旋转机械中，例如由油加热或用水冷却的旋转滚筒。使用不同的类型来匹配每组需求。Rotating unions, also called rotary unions or rotary joints, transfer fluid from a stationary supply into rotating machinery, such as a spinning drum heated by oil or chilled by water. Different types are used to match each set of requirements.
压力接头由介质压力密封，并使用强力弹簧在启动或非常低的压力下将密封件保持在一起。这种经典技术需要相对较大的扭矩，仅适用于相对较低的介质压力（<250 psi 或 17 bar）。 Pressure joints are sealed by media pressure, with a strong spring to keep seals together at startup or very low pressures. This classical technology requires a relatively large amount of torque and is suitable only for relatively media low pressures (<250 psi or 17 bar)
塑料密封件 Plastomeric Seals
塑性旋转接头使用定制的或市售的“软密封”，由特定应用的聚合物或弹性体制成。它们最适合具有间歇性旋转和压力的应用。虽然结构紧凑，但这些密封件表现出显着的扭矩、发热和磨损率。Plastomeric rotary unions use custom or commercially available “soft seals” made from application-specific polymers or elastomers. They are most suitable for applications with intermittent rotation and pressure. Though compact, these seals exhibit significant torque, heat generation, and wear rates.
静压密封 Hydrostatic Seals
静压旋转接头具有精确的公差，可在高压下提供非接触式密封，从而延长使用寿命并最大限度地减少维护。旋转元件悬浮在流体膜上，该流体膜以非常低的流速连续循环。流体剪切将这些接头的最大速度限制在几千 RPM。Hydrostatic rotary unions deploy precise tolerances to provide no-contact sealing at high pressures, extending life and minimizing maintenance. The rotating element is suspended on a fluid film that circulates continuously at a very low flow rate. Fluid shearing limits the maximum speed of these unions to a few thousand RPM.
机械密封旋转接头通过有意平衡流体动力，最大限度地减少密封磨损、扭矩和发热。平面度必须控制在微米以内，并根据所需的转速、压力和介质采用不同的密封材料。即使在压力 >140 bar 和速度 >40,000 RPM 的情况下，这些接头也能可靠运行。机械密封接头可以设计为随着机器操作条件的变化而表现不同。Mechanical seal rotary unions minimize seal wear, torque, and heat generation through intentional balancing of hydrodynamic forces. Flatness must be controlled within microns, and different seal materials are employed according to the desired RPM, pressure, and media. These unions perform reliably even at pressures >140 bar and speeds >40,000 RPM. Mechanical seal unions can be engineered to behave differently as the machine's operating condition changes.
Used throughout the industrialized world
旋转接头允许水、空气、液压、金属加工液、液压油、蒸汽、真空和各种其他介质的馈通。它们可以安装在旋转轴的末端或周围。Rotary unions allow the feedthrough of water, air, hydraulic, metalworking fluids, hydraulic oil, steam, vacuum and a variety of other media. They can be installed at the end of or around a rotating shaft.
Oil and Gas
Paper and Corrugating
Printing and Packaging
Agriculture and Construction
Food and Medical
Tire and Rubber
Custom Rotary Union Solution
Custom Union Solutions