Engineering machinery hydraulic torque converter pump impeller structure

Abstract

The invention relates to an engineering machinery hydraulic torque converter pump impeller structure. The structure comprises an inner ring, an outer ring and a blade grid connected between the inner ring and the outer ring, the inner ring and the outer ring are concentrically arranged, a circulating circular cavity is formed between the inner ring and the outer ring, the blade grid comprises n blades which are evenly arranged in the circumferential direction, n is larger than or equal to 26 and smaller than or equal to 30, n is an integer, a liquid flow channel with an inlet and an outlet is formed between every two adjacent blades, and the section, obtained by cutting any radial surface, of the circulating circular cavity is roughly in a sector ring shape. Parameters of the blades are redesigned, so that the whole circulating circular cavity is roughly in a basin shape, a space streamline structure is adopted, and the impact loss is reduced; the projection of the whole blade falls in the end surface of the outer ring end of each blade, so that mold drawing is facilitated, and the blade manufacturing precision is improved; compared with an existing mature product, a hydraulic torque converter can meet the requirement of the whole machine by just modifying the impeller blade grid, the universalization degree of parts is high, and the mold investment is saved.

Description

technical field [0001] The invention relates to the technical field of construction machinery hydraulic torque converters, in particular to a construction machinery hydraulic torque converter pump wheel structure. Background technique [0002] When the hydraulic torque converter is working, the engine drives the pump wheel to rotate, and the torque of the engine is applied to the pump wheel. When the pump wheel rotates, the blades in the pump wheel drive the working liquid to make circular motion together, and force the liquid to make relative motion along the passage between the blades. The working liquid obtains certain kinetic energy and pressure energy when it leaves the pump wheel through the action of the blades of the pump wheel, thus realizing the transformation of the mechanical energy of the engine into the liquid energy of the liquid. [0003] Among the blade parameters, the technical parameter that has a more obvious impact on the performance of the torque conve...

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Problems solved by technology

[0004] For the 9-ton loader, the newly developed front four and rear four multi-block boxes use a hydraulic torque converter with a circular circle diameter of 370mm. The current hydraulic torque converter used in stall conditions has a torque ratio of 2.28 and a pump wheel torque of 280N m , the maximum efficiency of the hydraulic torque converter is only 82%, and the maximum traction force and maximum vehicle speed can meet the use requirements after matching, but the economy is poor

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