Hydraulic Pumps

TRIPLE-SCREW PUMP

INQUIRY

Submersible Triple Screw Pumps

Jilihydraulics triple screw pumps are high-performance positive displacement pumps engineered for low and medium-pressure industrial scenarios, with a maximum working pressure of 80 bar. Featuring outstanding operational stability, ultra-low noise output and extended service life, these screw pumps serve as optimal core components for hydraulic home lifts and commercial elevator systems, effectively lowering long-term operational and maintenance costs. To accommodate diverse installation and assembly demands, the pumps are available with both standard male shafts and hollow shafts, enabling direct motor-pump coupling for a more compact and efficient system setup.

Designed as self-priming units integrated into a unified pump housing, Jilihydraulics triple screw pumps adopt a sophisticated structural design that completely eliminates axial load during operation. As working pressure builds up, precise clearance tolerance between the main screw’s balance piston and the pump housing generates stable hydrodynamic balancing force. This unique mechanism not only balances the axial force of the screw assembly but also provides continuous lubrication and cooling for internal sealing components, protecting key parts from high-temperature wear and failure.

Notably, the two auxiliary lateral screws are driven hydraulically by the conveyed fluid instead of mechanical contact transmission. This hydraulic driving mode eliminates mechanical friction and abrasion between screw components, realizing virtually wear-free operation and drastically extending the pump’s overall service lifespan.

Benefiting from advanced structural optimization and high-precision screw machining technology, these triple screw pumps deliver extremely low flow pulsation and noise emissions, meeting the strict quiet operation requirements of residential and commercial elevator equipment. The precisely machined geometric profiles of the three screws form independent sealed fluid chambers inside the pump body. During continuous rotation, the main drive screw forms enclosed fluid cavities that trap hydraulic oil and deliver it steadily and linearly from the inlet to the outlet in the axial direction. This smooth, pulsation-free fluid delivery ensures stable lifting operation of elevators and home lifts, delivering consistent and reliable hydraulic power output.

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