A guide wheel and hydraulic torque converter

Abstract

The invention belongs to the technical field of engineering machinery power, and discloses a guide wheel and a hydraulic torque converter. The guide wheel is connected to the pump wheel and provides oil to it. The guide wheel includes blades. According to the flow direction of the oil, the position of the blades can be adjusted, so that the angle of the inlet of the blade is the same as the angle of the inlet of the oil flow, and the outlet of the blade is placed The angle is the same as the inlet angle of the pump impeller. As the flow angle and torque of the oil flowing out of the turbine change, the placement angle of the vane inlet of the guide wheel is changed accordingly, and the impact loss of the oil is reduced to a minimum. At the same time, the placement angle of the impeller outlet remains unchanged and always matches the inlet angle of the pump wheel, so that the oil flow inside the torque converter is smoother and the flow loss is reduced. The vane of the guide wheel can adapt to a certain range of turbine speed changes, ensuring that the position of the vane of the guide wheel can be changed as required under the impact of the oil, adapting to the flow direction and state of the oil, so that the torque converter has a wide range of high-efficiency areas, and To achieve the purpose of improving transmission efficiency.

Description

technical field [0001] The invention relates to the technical field of construction machinery power, in particular to a guide wheel and a hydraulic torque converter. Background technique [0002] Existing engineering machinery, especially bulldozers, is equipped with a hydraulic torque converter, which is a device that uses liquid such as oil as a working medium and utilizes liquid kinetic energy for energy conversion. The basic form of commonly used torque converter is single-phase single-stage centripetal torque converter, also known as single-stage three-element hydraulic torque converter, which includes: pump impeller, turbine (turbine impeller) and guide wheel (stator impeller), the pump wheel is arranged centrifugally, the turbine is arranged centripetally, and the guide wheel is arranged axially (axially). [0003] The internal components such as the impeller in the guide wheel of the hydraulic torque converter are rigid body structures made by casting and other proc...

AI Technical Summary

Problems solved by technology

However, when the placement angle of the vane inlet of the guide wheel is changed, the placement angle of the vane outlet is also changed, which affects the suction characteristics of the pump impeller, and the resulting effect has certain limitations, so that the adaptation range does not change much and the efficiency improvement is not ideal.

Since this adjustment scheme is mainly used in stable load situations, it can only be used on torque converters with specific types of structures, and is not suitable for application in the field of construction machinery

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