CN103233990A

CN103233990A - Diaphragm spatial tether brake

Info

Publication number: CN103233990A
Application number: CN2013101649429A
Authority: CN
Inventors: 王长青; 李爱军; 董哲; 王景
Original assignee: Northwestern Polytechnical University
Current assignee: Northwestern Polytechnical University
Priority date: 2013-05-07
Filing date: 2013-05-07
Publication date: 2013-08-07
Anticipated expiration: 2033-05-07
Also published as: CN103233990B

Abstract

The invention provides a diaphragm spatial tether brake which comprises a frame, a diaphragm and a connecting rod. The diaphragm is in a cone shape and with a bottom surface provided with an opening; the connecting rod penetrates through a through hole which is formed on the frame to be perpendicular to the bottom surface of the diaphragm and connected with a vertex of the diaphragm; and the connecting rod can move along the through hole to press the diaphragm towards a tether and then enable the diaphragm to be closely attached to a plane of the frame. The diaphragm spatial tether brake has the advantages of being capable of being used for a spatial test and a ground test bench; avoiding over-press caused by a small contact area to cause large damages to the tether due to the fact that the contact area between the diaphragm spatial tether brake and the tether is large; and being simple in control structure, large in braking force, high in reliability and low in cost.

Description

A kind of diaphragm space tether break

Technical field

The present invention relates to a kind of space tether break, belong to space tether system apparatus field.

Background technique

Space tether break is the important component part of space tether system, is the key that ensures space tether system normal operation, its performance directly influence space test and and ground experiment finish quality.At present, tether break in space mainly contains TSS series and two kinds of forms of SEDS series.For SEDS series break, the simple cost of this brake structural is lower, change between tether frictional force to the tether control of braking by the barberpole braking device, but the wearing and tearing to tether is excessive in brake process, cause tether to rupture easily.For TSS series break, it can control release and the recovery of tether by the driving device spool.But, because this series break has adopted ACTIVE CONTROL, therefore having increased the complexity of system, cost increases, and has increased the uncertainty of system simultaneously.

Summary of the invention

In order to overcome the deficiencies in the prior art, the invention provides a kind of diaphragm type space tether break, more reasonable structure, working efficiency is higher, and is little to the tether wearing and tearing.

The technical solution adopted for the present invention to solve the technical problems is: comprise framework, diaphragm and connecting rod; Described diaphragm is the taper shape of bottom surface opening, and described connecting rod passes the through hole on the framework, links to each other perpendicular to the diaphragm bottom surface and with the diaphragm summit, and connecting rod can move along through hole, and pressing diaphragm to tether, and then is fitted on the plane of framework.

Described diaphragm internal surface has the corrugated projection, and the ripple direction is vertical with tether moving direction.

The material of described diaphragm is 316L special alloy material.

The material of described framework is 316L special alloy material.

The material of described connecting rod is 3J53 special alloy material.

The summit of described diaphragm does not contact with tether in the link motion process, and the braking of tether is only relied on the friction of diaphragm, and the displacement of the braking force that diaphragm produces and the rigid central of diaphragm is linear.

The invention has the beneficial effects as follows: this break both can be used for space test, also can be used for the ground experiment platform.Secondly break and tether area of contact are bigger, avoid the too for a short time pressure that causes of area of contact excessive, and then cause the damage of tether greatlyyer, and, control structure of the present invention is simple, and braking force is big, the reliability height, and cost is lower.

Description of drawings

Fig. 1 is structure plan view of the present invention;

Fig. 2 is structure sectional view of the present invention;

Among the figure, 1-diaphragm, 2-framework, 3-connecting rod.

Embodiment

The present invention is further described below in conjunction with drawings and Examples.

A kind of diaphragm space tether break comprises framework, diaphragm, connecting rod; Described connecting rod passes hole on the framework along linking to each other with the diaphragm center of circle with the vertical direction of diaphragm place horizontal plane, and connecting rod can move up and down along the hole.Diaphragm is overlooked and is circle, the side for with rod connection point be the taper on summit, the diaphragm center of circle links to each other with connecting rod, it is corrugated simultaneously that diaphragm contacts with tether, the ripple direction keeps vertical with tether moving direction in plane, diaphragm place.Diaphragm can move up and down to change the area of contact of diaphragm and tether with connecting rod.When tether is controlled, diaphragm is pressed to rubbing surface with tether, braking to tether mainly relies on ripple to realize, the material of diaphragm is 316L special alloy material, fricative heat can guarantee in braking process owing to can in time shed the infringement that minimizing raises tether is produced owing to temperature.The rigid central of diaphragm does not contact with tether, and the braking of tether is only relied on the friction of diaphragm, and the displacement of the braking force that diaphragm produces and the rigid central of diaphragm is linear.

Fig. 1, the 2nd, the mechanical schematic diagram of a kind of diaphragm of the present invention space tether break, its Der Grundsatz der Maschinen is made up of diaphragm 1,1 framework 2, connecting rod 3.In Fig. 1, framework 2 is Openworks shape, overlooks break from the framework top and can see diaphragm, in order to observe the break working condition, framework left end and right-hand member have import and the outlet of tether respectively, and frame material is selected 316L special alloy material.This material has stronger corrosion resistance, and heat-resisting ability is stronger, can adapt to space environment complicated and changeable in the space.Connecting rod 3 passes the hole on the framework 2 perpendicular to framework 2 and is fixed on the framework 2, and can move up and down, and connecting rod 3 present positions were counted when the move distance scope contacted with tether fully from diaphragm, and the 4cm that can move upward, connecting rod 3 materials are 3J53 special alloy material.Connecting rod 3 the other ends link to each other with diaphragm 1, and the joint is the center of circle of diaphragm 1, and diaphragm 1 is overlooked and is that circle, material are 3J53 special alloy material, and this material has higher modulus of elasticity and intensity, and heat-resisting ability is stronger simultaneously.Adopt cone diaphragm, the profile tapering is 30 °, external diameter is 4cm, the radius of clean-up is 2.5cm, flat central diameter 1.1cm, diaphragm thickness 0.03mm, wave height 0.11mm, ripple spacing 1.45mm, flat plate margin 1.2cm, corrugated profile is the sinusoidal ripple, the ripple direction keeps vertical with tether moving direction in plane, diaphragm place, Young's modulus is 7.35 * 107Pa, and Poisson's ratio is 0.3, and the ripple number is 7, to with tether when needs are controlled tether, connecting rod 3 drives diaphragm 1 and moves downward, because the surface of contact of diaphragm 1 and tether is the wave groove shape, frictional force is bigger, when diaphragm 1 contacts with tether, can brake tether, reach the control purpose, braking force changes between 0.01N and 5N in the braking process.When braking process was finished, connecting rod 3 drove diaphragm 1 and moves upward, and when not contacting fully with tether, braking process finishes.In braking process, the distance by control link moves up and down realizes the control to the frictional force between diaphragm and tether.

Claims

1. diaphragm space tether break, comprise framework, diaphragm and connecting rod, it is characterized in that: described diaphragm is the taper shape of bottom surface opening, described connecting rod passes the through hole on the framework, link to each other perpendicular to the diaphragm bottom surface and with the diaphragm summit, connecting rod can move along through hole, and pressing diaphragm to tether, and then is fitted on the plane of framework.

2. diaphragm according to claim 1 space tether break, it is characterized in that: described described diaphragm internal surface has the corrugated projection, and the ripple direction is vertical with tether moving direction.

3. diaphragm according to claim 1 space tether break, it is characterized in that: the material of described diaphragm is 316L special alloy material.

4. diaphragm according to claim 1 space tether break, it is characterized in that: the material of described framework is 316L special alloy material.

5. diaphragm according to claim 1 space tether break, it is characterized in that: the material of described connecting rod is 3J53 special alloy material.

6. diaphragm according to claim 1 space tether break, it is characterized in that: the summit of described diaphragm does not contact with tether in the link motion process, the braking of tether is only relied on the friction of diaphragm, and the displacement of the braking force that diaphragm produces and the rigid central of diaphragm is linear.