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Simple pendulum type drop test device

A test device and single pendulum technology, applied in the field of single pendulum drop test device, can solve the problems of endangering aircraft safety, different motion characteristics, affecting the accuracy of launching, etc., achieving good repeatability, convenient disassembly and assembly, and convenient device maintenance. Effect

Inactive Publication Date: 2012-07-11
中国航空工业空气动力研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the initial stage of leaving the aircraft, the release personnel and the objects are in a complex disturbance flow field, so that the motion characteristics of the separation of the personnel and objects from the aircraft are quite different from those in a uniform flow field
Bad launch separation not only affects the accuracy of launch, but more seriously, it will endanger the safety of the aircraft

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: Combining Figure 1-Figure 4 , a kind of single pendulum type throwing test device of the present invention, it is by pendulum (1), hexagon socket cap screw (2), pole (3), riser (4), hexagonal nut (5), drag Nut (6), connecting rod (7), cross recessed pan head screw (8), drive system (9), deep groove ball bearing (10), gear rod (11), swing distance adjustment hole (12), striker rod (13), striker top (14), striker support (15) and drop object model (16) form, pendulum (1) connects strut (3) by hexagon socket cap screw (2), strut ( 3) Connect the vertical plate (4) through the hex nut (5), the driving system (9) connects the connecting rod (7) through the cross recessed pan head screw (8), and the connecting rod (7) connects the drag nut (6) and the deep The groove ball bearing (10), the drag nut (6) is connected to the gear lever (11), the striker support (15) is connected to the striker rod (13), the striker rod (13) is connected to the striker head (14), and...

Embodiment 2

[0012] Example 2: Combining Figure 1-Figure 4 , the present invention is installed at the aircraft model side hatch or the cargo compartment door, through Figure 4 The pendulum adjustment hole (12) shown in the figure adjusts the pendulum (1) installed on the pole (3) to a predetermined height, and the stop bar (11) is extended to a position that can support the pendulum. When the delivery condition is reached, The driving system (9) can drive the connecting rod (7) equipped with deep groove ball bearings (10) to slide, and the connecting rod (7) drives the drag nut (6) to move, and then the pendulum can fall free from the stop rod (11) After the pendulum falls freely and hits the firing pin rod (13), it hits the object (16) through the firing pin head (14), and the object goes out of the cabin, thereby realizing the dropping of the object. The pendulum (1) is connected with the support rod (3) through the hexagon socket head cap screw, the support rod (3) is fixed on the b...

Embodiment 3

[0013] Example 3: Binding Figure 1-Figure 4 , the invention is a low-speed wind tunnel launch test device for dynamic similar models. In the low-speed launch test, the influence of the Mach number is not considered, and the influence of the Reynolds number is considered to be negligible, and the Froude number Fr is guaranteed to be equal, that is

[0014] V m 2 l m g m = V f 2 l f g f

[0015] In the formula: V- flight speed or test wind speed;

[0016] l - characteristic length;

[0017] g - acceleration due to gravity;

[0018] Subscript: m means the model; f means the full-scale object.

[...

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Abstract

The invention provides a simple pendulum drop type test device, which is composed of a pendulum bob, a hexagon socket head cap screw, a supporting rod, a vertical board, a hexagon nut, a dragging nut, a connecting rod, a cross recessed pan head screw, a driving system, a deep groove ball bearing, a blocking rod, a pendulum distance adjusting hole, a firing pin rod, a firing pin head, a firing pin supporting seat and a drop subject model. The pendulum bob is connected with the supporting rod through the hexagon socket head cap screw, the supporting rod is connected with the vertical board through the hexagon nut, the driving system is connected with the connecting rod through the cross recessed pan head screw, the connecting rod is connected with the dragging nut and the deep groove ball bearing, the dragging nut is connected with the blocking rod, the firing pin supporting seat is connected with the firing pin rod, and the firing pin rod is connected with the firing pin head which is connected with the drop subject model. By means of the simple pendulum type drop test device, a drop test of workers and cargo models of a side cargo bay and a cargo bay door of the airplane model can be achieved, maintenance of the device is convenient, and dismounting is speedy. The test indicates that different initial velocities of drop object models can be obtained through the simple pendulum drop test device, and repeatability is good.

Description

(1) Technical field [0001] The invention relates to aviation aerodynamic experiment technology, in particular to a single pendulum dropping test device. (2) Background technology [0002] Airdrop is a very important means of personnel delivery and material supply, which plays an indispensable role in disaster relief, and its application will become more and more extensive. With the increasing urgency of emergency and natural disasters for rescue personnel and materials, issues such as the safety of the aircraft used for delivery, the delivery of personnel and materials, and the accurate delivery of personnel and materials have attracted people's attention. However, since the initial stage of leaving the aircraft for the release personnel and objects is in a complex disturbance flow field, the motion characteristics of separating the personnel and objects from the aircraft are quite different from those in a uniform flow field. Bad release separation not only affects the acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/00
Inventor 李玉侠张鹏多勐于金革
Owner 中国航空工业空气动力研究院
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