Driving structure for regulating area of external culvert

A driving structure and area adjustment technology, which is applied in the direction of machines/engines, jet propulsion devices, etc., can solve problems such as low safety factor, easy sticking, and non-unique rotation degrees of freedom of the sub-slider.

Active Publication Date: 2018-09-21
AECC SICHUAN GAS TURBINE RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this conventional scheme, there is a circumferential component force in the connecting rod, which will cause the rotational freedom of the sub-slider to be not unique, and the axial displacement is uncontrollable; the conventional schem

Method used

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  • Driving structure for regulating area of external culvert
  • Driving structure for regulating area of external culvert
  • Driving structure for regulating area of external culvert

Examples

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[0018] The first upper connecting rod 1, the second upper connecting rod 2, the third upper connecting rod 3, and the fourth upper connecting rod 4 constitute the first quadrilateral connecting rod, because the mounting base 9 is fixed. Therefore, when the actuator pushes the hinge point 11 of the first upper link 1 and the second upper link 2 to move axially, the third upper link 3 rotates counterclockwise, the fourth upper link 4 rotates clockwise, and the first The third upper link 3 is coaxial with the second lower link 6, and the fourth upper link 4 is coaxial with the first lower link 5, so the second lower link 6 rotates counterclockwise, and the crank 5 rotates clockwise. The first lower link 5, the second lower link 6, the third lower link 7, and the fourth lower link 8 form another quadrilateral structure. According to a similar ratio, the connecting seat 12 will also move axially, and the ratio of the displacement of the actuator to the displacement of the connectin...

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PUM

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Abstract

The invention provides a driving structure for adjusting the area of an outer culvert. The driving structure comprises a sliding cylinder (10), an upper four-bar mechanism and a lower four-bar mechanism, wherein the sliding cylinder (10) is located at an outlet of the outer culvert, the sliding cylinder (10) axially moves to change the area of the outlet of the outer culvert, the upper four-bar mechanism is connected with an actuating cylinder, the lower four-bar mechanism is connected with the sliding cylinder (10), and the upper four-bar mechanism and the lower four-bar mechanism are connected through a coaxial connection. The driving structure controls the smooth and accurate axial movement of the outer culvert way sliding cylinder, limits the freedom of the sliding cylinder through theapplication of a symmetrical crank-connecting rod mechanism, and has the advantages of unique movement direction, good displacement precision, stable system, rapid reaction and no clamping stagnation.

Description

technical field [0001] The invention belongs to the design field of regulating mechanisms in gas turbine engines, focuses on the design of driving mechanisms, and particularly relates to a driving structure for regulating the external area. Background technique [0002] In order to realize the variable cycle of the variable cycle engine, the bypass ratio needs to be changed at first, and an axially moving sliding cylinder is needed to control the size of the bypass channel area. [0003] At present, there is a common scheme of a conventional single crank and a single connecting rod for the adjustment method of the slide cylinder. In this conventional scheme, there is a circumferential component force in the connecting rod, which will cause the rotational freedom of the sub-slider to be not unique, and the axial displacement is uncontrollable; the conventional scheme will add a guide rail to avoid circumferential movement, but for the thermal expansion of the engine For larg...

Claims

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Application Information

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IPC IPC(8): F02K3/075
CPCF02K3/075
Inventor 陈乾明李冠达姚利盼董婷刘治呈格桑央珍
Owner AECC SICHUAN GAS TURBINE RES INST
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