CN202403889U - Simple pendulum type drop test device - Google Patents

Abstract

The utility model provides a simple pendulum type drop test device, which includes a pendulum bob, a hexagon socket head cap screw, a supporting rod, a standing plate, a hexagonal nut, a drawing nut, a connecting rod, a cross recessed pan head screw, a driving system, a deep-groove ball bearing, a gear rod, a swing distance adjusting hole, a firing pin rod, a firing pin plug, a firing pin support and a dropping object model, wherein the pendulum bob is connected with the supporting rod through the hexagon socket head cap screw; the supporting rod is connected with the standing plate through the hexagonal nut; the driving system is connected with the connecting rod through the cross recessed pan head screw; the connecting rod is connected with the drawing nut and the deep-groove ball bearing; the drawing nut is connected with the gear rod; the firing pin support is connected with the firing pin rod; the firing pin rod is connected with the firing pin plug; and the firing pin plug is connected with the dropping object model. According to the utility model, drop tests of airplane model side compartment doors, cargo compartment door personnel and goods models can be realized, the device is convenient to maintain, fast and convenient to mount and dismount; and experiments show that the simple pendulum type drop test device can obtain different dropping initial velocities of the dropping object model, and has excellent repeatability.

Description

A kind of mono-pendulum type drop-test device

(1) technical field

The utility model relates to aviation aerodynamic experiment technology, is exactly a kind of mono-pendulum type drop-test device specifically.

(2) background technology

Air-drop is that a kind of very important personnel deliver and the material supply means, in the disaster relief, is bringing into play indispensable effect, and its application will be more and more widely.Along with accident and disaster to rescue personnel and the urgent enhancing day by day of material requirements, the safety of the aircraft that is used to throw in, input personnel and goods and materials, and the problems such as accurate input of input personnel and goods and materials receive people's attention.Yet,, make kinetic characteristic that input personnel and missile separate with aircraft and in uniform flow field, differ widely because the starting stage that input personnel and missile are disembarked all is in the complicated interference flowing field.Bad input separates the accuracy that not only influence is thrown in, and more serious is the safety of entail dangers to aircraft.For the security of judging that input personnel and missile are thrown in from aircraft; Usually utilize model in wind-tunnel, to throw in the characteristic prediction experiment; To understand input personnel and missile at disengaging movement attitude and the track of throwing in the starting stage; Analysis of aircraft the profile of the various angles of attack, yaw angle, flying speed, flying height and missile and aboard parameter such as placement position to the influence of missile disengaging movement track and attitude; Confirm the parameter area that safety is thrown in, throw in parameter for aircraft test basis is provided.And being drop-test, the drop-test device whether successfully reaches one of gordian technique of obtaining the high-quality test findings.

(3) summary of the invention

The purpose of the utility model is to provide a kind of mono-pendulum type drop-test device.

The purpose of the utility model be achieved in that it by pendulum, hexagon socket cap head screw, pole, riser, hexagonal nut, drag nut, connecting rod, Cross Recess Head Screw, drive system, deep groove ball bearing, lever, pendulum and form apart from adjustment hole, striker, striker top, striker bearing and missile model; Pendulum connects pole through hexagon socket cap head screw; Pole is through the hexagonal nut connection board; Drive system connects connecting rod through Cross Recess Head Screw; The connecting rod connection drags nut and deep groove ball bearing, drags nut and connects lever, and the striker bearing connects striker; Striker connects the striker top, and the striker top connects the missile model.

A kind of mono-pendulum type drop-test of the utility model device can be realized the drop-test of model aircraft side hatch door and cargo door personnel and goods model, convenience for device maintenance, and dismounting is convenient.Test shows that this mono-pendulum type drop-test device can obtain the different input initial velocity of missile model, and good reproducibility.

(4) description of drawings

Fig. 1 is the front view of the utility model structure;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the principle chart of the utility model;

Fig. 4 is delivery device and striker relative position synoptic diagram.

(5) embodiment

For example the utility model is described further below in conjunction with accompanying drawing.

Embodiment 1: combine Fig. 1-Fig. 4; A kind of mono-pendulum type drop-test of the utility model device; It by pendulum (1), hexagon socket cap head screw (2), pole (3), riser (4), hexagonal nut (5), drag nut (6), connecting rod (7), Cross Recess Head Screw (8), drive system (9), deep groove ball bearing (10), lever (11), pendulum is formed apart from adjustment hole (12), striker (13), striker top (14), striker bearing (15) and missile model (16); Pendulum (1) connects pole (3) through hexagon socket cap head screw (2); Pole (3) is through hexagonal nut (5) connection board (4), and drive system (9) connects connecting rod (7) through Cross Recess Head Screw (8), and connecting rod (7) connection drags nut (6) and deep groove ball bearing (10); Drag nut (6) and connect lever (11); Striker bearing (15) connects striker (13), and striker (13) connects striker top (14), and striker top (14) connects missile model (16).

Embodiment 2: combine Fig. 1-Fig. 4, the utility model is installed in model aircraft side hatch door or cargo door place, adjusts to predetermined altitude through pendulum shown in Figure 4 apart from the pendulum (1) that adjustment hole (12) will be installed on the pole (3); Pin (11) is stretched to the position that can support pendulum; When waiting to reach the input condition, drive system (9) can drive the connecting rod (7) of being furnished with deep groove ball bearing (10) and slide, and connecting rod (7) drives and drags nut (6) motion; And then make pendulum break away from pin (11) free-falling; The pendulum free-falling impacts striker (13) back through striker top (14) bump missile (16), missile deliver from vault, and then the input of realization missile.(3 are connected pendulum (1) with pole through hexagon socket cap head screw; Pole (3) is fixed on the baffle plate (4) through hexagonal nut (5); Lever (11) with drag nut (6) and also be connected through hexagonal nut; Connecting rod (7) is connected with drive system (9) through Cross Recess Head Screw (8), and drive system (9) can drive the connecting rod (7) of being furnished with deep groove ball bearing (10) and slide.

Embodiment 3: combine Fig. 1-Fig. 4, the utility model is the low-speed wind tunnel drop-test device that is used for dynamically similar model.In the low speed drop-test, do not consider the influence of Mach number, think that simultaneously the influence of Reynolds number can be ignored, and guarantee that Froude number Fr equates, promptly

$\frac{V_m^2}{l_m{g}_m}=\frac{V_f^2}{l_f{g}_f}$

In the formula: V-flying speed or The test wind;

The l-characteristic length;

G-acceleration of gravity;

Subscript: m representation model; F representes full-scale material object.

In addition, when carrying out drop-test, can obtain the required throwing power that helps of test simulation by the dynamic similarity condition and concern, promptly

$P_m^{\′}=\frac{P_f^{\′}}{K^3\mathrm{\Δ}}$

In the formula: P '-for helping throwing power;

The inverse of K-model scale ratio, K=l _f/ l _m

Δ-air relative density, Δ=ρ _f/ ρ _m

ρ-atmospheric density.

Visible by following formula, to same missile model, when the simulation differing heights was thrown in, the power that the model delivery device should apply was different.This mono-pendulum type drop-test device can be through the adjustment pendulum pendulum apart from and weight change domestic model help throwing power, and then obtain the different initial velocity of missile model.

Claims (1)

1. mono-pendulum type drop-test device; It by pendulum (1), hexagon socket cap head screw (2), pole (3), riser (4), hexagonal nut (5), drag nut (6), connecting rod (7), Cross Recess Head Screw (8), drive system (9), deep groove ball bearing (10), lever (11), pendulum is formed apart from adjustment hole (12), striker (13), striker top (14), striker bearing (15) and missile model (16); It is characterized in that: pendulum (1) connects pole (3) through hexagon socket cap head screw (2); Pole (3) is through hexagonal nut (5) connection board (4); Drive system (9) connects connecting rod (7) through Cross Recess Head Screw (8); Connecting rod (7) connection drags nut (6) and deep groove ball bearing (10), drags nut (6) and connects lever (11), and striker bearing (15) connects striker (13); Striker (13) connects striker top (14), and striker top (14) connects missile model (16).

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