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An Iris Pump Loss Suppressing Mechanism for Hydraulic Retarder

A hydraulic retarder, pump air loss technology, applied in the direction of liquid resistance brakes, mechanical equipment, brake types, etc., can solve the problems of increasing the complexity of hydraulic machinery, occupying space, and being unfavorable for actual vehicle applications, and achieving improvement Effect of turbulence and drag reduction, convenient maintenance, and reduction of pump air loss

Active Publication Date: 2019-06-25
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method needs a separate mechanism and control pipeline to realize, which not only increases the complexity of the hydraulic machinery, improves the processing and matching accuracy, but also takes up a lot of space, which is not conducive to the application of real vehicles

Method used

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  • An Iris Pump Loss Suppressing Mechanism for Hydraulic Retarder
  • An Iris Pump Loss Suppressing Mechanism for Hydraulic Retarder
  • An Iris Pump Loss Suppressing Mechanism for Hydraulic Retarder

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Embodiment Construction

[0026] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0027] See attached figure 1 , an iris type pump air loss suppression mechanism for a hydraulic retarder, which includes: a support frame 2, a hydraulic piston assembly 1, an iris stopper 3, a linear slider 4 and an arc slider 5; The iris block 3 means that the block is based on the iris-type block structure.

[0028] Hydraulic piston assembly 1 includes: piston stopper 6, limit block 7, piston rod 8, piston cylinder 9, spring 10, sealing ring 11, bolt 12 and spring washer 13, such as figure 2 As shown; the piston stopper 6 is fixed on the end face of the piston rod 8 by the bolt 12 and the spring washer 13, and the working surface of the piston stopper 6 bears the pressure of air or oil, and drives the piston rod 8 to move into the cylinder when under pressure The limit block 7 and the end face of the rod body extension of the piston cylinder 9 are fix...

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Abstract

The invention belongs to the field of vehicle hydrodynamic auxiliary braking, and particularly relates to an iris type pumping loss reduction device for a hydrodynamic retarder. According to the technical scheme of the iris type pumping loss reduction mechanism for the hydrodynamic retarder, when the hydrodynamic retarder is not charged with oil, a piston rod stretches out, a flow pass is blockedby an iris block piece, the circular flow of air inside a wheel cavity is hindered by the iris block piece, the gas flow between a moving wheel and a fixed wheel is held back, and therefore, the torque and power loss generated by the moving wheel during idling are reduced. When the hydrodynamic retarder starts to be charged with oil for work, because the impact force of oil is larger than that ofair, when the force applied on a piston block piece is larger than the pretension force of a spring, the piston rod is pressed into a piston cylinder, and the iris block piece will draw back to the back side of a supporting rack so as not to block the flow pass; and at the moment, the pumping loss reduction mechanism is of no effect and does not influence the circular flow pass of the hydrodynamicretarder, and the oil in the working chamber of the hydrodynamic retarder normally carries out circular flow to carry out braking. According to the iris type pumping loss reduction mechanism for thehydrodynamic retarder, the reduction effect on pumping loss is improved.

Description

technical field [0001] The invention belongs to the field of vehicle hydraulic auxiliary braking, in particular to a device for reducing the pumping loss of a hydraulic retarder. Background technique [0002] As a vehicle auxiliary braking device, the hydraulic retarder has the advantages of high power density, large braking torque, no mechanical wear and thermal decay, and can be used for long-term and long-distance continuous braking. in the vehicle. The hydraulic retarder uses hydraulic oil as the transmission medium, and is mainly composed of a moving wheel, a fixed wheel, a transmission shaft and a control system. As the working oil is injected into the working cavity between the moving wheel and the fixed wheel, when the liquid circulates in the working flow channel formed by the moving wheel and the fixed wheel, it will encounter hydraulic losses caused by various resistances, such as impact loss and friction loss. , steering loss, etc., resulting in braking torque....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D57/02
CPCF16D57/02
Inventor 魏巍刘堂柱安媛媛孔令兴闫清东
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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