Screw jack for nuclear reactor servicing

Screw jack for nuclear reactor servicing

Screw jack for nuclear reactor servicing

screw jack


A screw jack is a mechanical device used for lifting heavy loads vertically or horizontally. Its screw mechanism converts rotational motion into linear motion, providing precise and controlled movements. In the context of nuclear reactor servicing, screw jacks play a crucial role in various maintenance and repair operations.

What is a screw jack used for?

screw jack

  • 1. Supporting and stabilizing nuclear reactor components during maintenance.
  • 2. Lifting and positioning heavy machinery for repair or replacement.
  • 3. Adjusting the height and alignment of reactor core components.
  • 4. Controlling the movement of shielding and safety devices.
  • 5. Facilitating the installation and removal of fuel elements.

Working principle of screw jack

screw jack

A screw jack operates based on the principle of a screw thread’s rotational and linear motion conversion. When the input rotary motion is applied to the screw, the load is lifted or lowered depending on its direction. The screw jack’s mechanical advantage allows it to handle heavy loads with minimal effort, making it an ideal choice for nuclear reactor servicing.

Difference between a screw jack and a hydraulic jack

While both screw jacks and hydraulic jacks are used for lifting heavy loads, they differ in their mechanisms and applications. The main differences include:

  • 1. Power source: Screw jacks utilize mechanical rotation, while hydraulic jacks use hydraulic fluid pressure.
  • 2. Precision: Screw jacks offer finer control and precise positioning, making them suitable for delicate operations. Hydraulic jacks provide rapid lifting and are better suited for heavy-duty tasks.
  • 3. Maintenance: Screw jacks require less maintenance and offer longer service life compared to hydraulic jacks.
  • 4. Safety: Screw jacks have built-in safety features like self-locking, preventing accidental lowering of loads. Hydraulic jacks may require additional safety measures to prevent sudden load drops.
  • 5. Cost: Screw jacks are generally more cost-effective and easier to install and maintain than hydraulic jacks.

Choosing and customizing a suitable screw jack

screw jack

When selecting or customizing a screw jack for specific applications, several parameters and conditions need to be considered:

  • 1. Load capacity: Determine the maximum weight the screw jack needs to handle.
  • 2. Lift height: Calculate the required vertical travel distance for the screw jack.
  • 3. Speed: Determine the desired lifting or lowering speed for efficient operation.
  • 4. Environmental conditions: Consider factors such as temperature, humidity, and exposure to chemicals or radiation.
  • 5. Safety requirements: Assess the need for additional safety features like limit switches, overload protection, or emergency stop mechanisms.

To meet these requirements and more, HZPT, a leading manufacturer of industrial motors, gear reducers, and drive solutions in China, offers a wide range of screw jacks and related products. Our products include:

  • 1. Micro gear motors
  • 2. Medium-sized gear motors
  • 3. Brake variable speed motors
  • 4. Torque motors
  • 5. DC motors

With our expertise and commitment to technological innovation, HZPT provides reliable and high-quality screw jack solutions that cater to various industrial needs. We specialize in:

  • 1. NMRV worm gear motors
  • 2. Bevel gear cone gear motors
  • 3. WPRV worm gear reducers
  • 4. Rigid tooth surface bevel gear reducers
  • 5. Helical bevel gear reducers

Our transmission products find extensive applications in industries such as transportation, food processing, medical equipment, printing, textile machinery, packaging, office equipment, and instrumentation. HZPT is your preferred partner for automation equipment.


Find us

Ep Screw Jack Co., Ltd.

Mail: [email protected]

As one of leading manufacturers, suppliers and exporters of mechanical products in China, We offer reducers, sprockets, industrial and conveyor chain, belts, pulleys, gears, racks, gearboxes, motors, PTO Shafts, taper lock Bushing, vacuum Pumps, screw air compressors and many other products. Please contact us for details.