Screw Pump Cooling Circuit With Valve-Free Constant Flow

The patent extracts and eliminates the proportional valve from the system by using a screw pump that inherently provides constant flow rate without requiring external flow regulation components. The screw pump's positive displacement mechanism self-regulates flow, removing the need for the proportional valve shown in Figure 1.

The screw pump provides self-regulating constant flow rate through its inherent positive displacement mechanism, without requiring external control systems or additional components. The pump automatically maintains consistent flow based on its mechanical design, making the system self-sufficient.

The patent makes the screw pump multi-functional by enabling it to perform both main cooling circuit pumping and auxiliary pumping functions. The pump's design allows it to be strategically positioned and controlled to serve multiple purposes, eliminating the need for separate auxiliary centrifugal pumps.

The patent combines multiple pumping functions into a single screw pump system. By strategically positioning the pump and using appropriate control logic, one pump performs both primary coolant circulation and auxiliary functions that would traditionally require separate pumps.

The patent uses composite materials, specifically plastic or polymer materials, to manufacture the screws instead of traditional metals. These composite materials provide sufficient structural strength for pump operation while significantly reducing weight and manufacturing complexity.

The patent adopts plastic screws that are cheaper to manufacture and lighter in weight compared to metal screws. While plastic may have different durability characteristics, it provides adequate service life for pump application and offers significant advantages in cost and weight reduction.