CN201238179Y - Novel shockproof hammer - Google Patents

Abstract

The utility model discloses a novel damper which comprises a wire clamp, a steel stranded wire and two damper heads; the wire clamp is fixed in the middle part of the steel stranded wire; the two ends of the steel stranded wire are fixedly provided with the damper heads which are divided into a large damper head and a small damper head; the weight of the large damper head is 1.2 to 2 times of that of the small damper head. The distance from the gravity center of the large damper head to the center of the wire clamp is longer by 0 to 100mm than the distance from the gravity center of the small damper head to the center of the wire clamp. As the weights of the two damper heads are different, and the distances of the two damper heads relative to the body of the wire clamp are different, the novel damper can form a plurality of different resonance frequencies, effectively control vibration formed by a breeze, and prevent metal fatigue, thereby prolonging the service life of a lead.

Description

A kind of novel vibration resistant hammer

Technical field

The utility model relates to the vibration-proof equipment that uses on a kind of electrical network overhead transmission line, particularly a kind of novel vibration resistant hammer.

Background technology

At present, the vibration protection that lead of overhead transmission line (particularly large-section lead) and lightning conducter are comparatively ripe mainly is the method for taking to install stockbridge damper.Facts have proved that stockbridge damper has significant vibration-isolating effect.Two tup equal and opposite in directions about existing stockbridge damper, distance center point distance equates that its vibration frequency is single like this, the aeolian vibration frequency range of control is little.

Summary of the invention

The technical problems to be solved in the utility model is at the deficiencies in the prior art, has proposed a kind of novel vibration resistant hammer that forms a plurality of different resonance frequencys.

The technical problems to be solved in the utility model is achieved through the following technical solutions, a kind of novel vibration resistant hammer, comprise wire clamp, steel hinge line and tup, wire clamp is fixed on the steel hinge line middle part, the two ends of steel hinge line are fixed with tup, be characterized in: described tup is divided into big tup and little tup, and big tup is 1.2～2 times of the nose heave amount of hand hammer.

The technical problems to be solved in the utility model can also come by the following technical programs further to realize that the center of gravity of big tup arrives the distance 0～100mm at wire clamp center than the center of gravity of little tup to the distance at wire clamp center.

The utility model compared with prior art, novel vibration resistant hammer since two tups vary in weight and two tups different with respect to the distance of wire clip body, so can form a plurality of different resonance frequencys, effectively control the formed vibration of gentle breeze, the useful life that prevents metal fatigue and then extension lead.

Description of drawings

Fig. 1 is a structure diagram of the present utility model.

Fig. 2 is that the vibration frequency of tup center of gravity produces figure.

Embodiment

A kind of novel vibration resistant hammer comprises wire clamp 2, steel hinge line 3 and tup, and wire clamp 2 is fixed on steel hinge line 3 middle parts, and the two ends of steel hinge line 3 are fixed with tup, and described tup is divided into big tup 1 and hand hammer head 4, and big tup 1 is 1.2-2 times of hand hammer head 4 weight.The center of gravity of big tup 1 arrives the distance 0-100mm at wire clamp 2 centers than the center of gravity of hand hammer head 4 to the distance at wire clamp 2 centers.

The weight of stockbridge damper is its most basic parameter, wherein comprises two parts again: the one, and live-weight, the i.e. tup of stockbridge damper; The 2nd, deadweight, i.e. wire clamp and hoist cable.Weight about stockbridge damper, we know: if weight surpasses the weight of wire of half-wavelength, to form a new node at the weight place, vibration in the span will continue and not disappear, and in fact the dangerous spot of fatigue is moved to this point by the suspension clamp outlet, the live-weight of stockbridge damper should be equivalent to the wire weight of 1/2 ∽, 3/4 wavelength, and mean wind speed 3.61m/s consideration is pressed in the calculating of wavelength, should be not more than 0.3 times of live-weight as for the permissible value of deadweight.

(calculating with stockbridge damper) with the LGJ-240/40 lead

$W=m\×\frac{3}{4}\×\frac{D}{0.185\×v}\×\sqrt{\frac{T}{m}}$

W--stockbridge damper live-weight in the formula, kg

M-lead Unit Weight,

λ-wavelength, m

V-wind speed, v=3.61m/s

D-diameter of wire, m

The average running tension of T-lead promptly calculates the 25%N of pull-off force

Novel vibration resistant hammer tup center of gravity and frequency

The stockbridge damper of normal design, its center of gravity is in the inboard of tup fixing point, as shown in Figure 2.O is a center of gravity among the figure, O ¹Be the tup fixing point, A is the fixing point of wire clamp to hoist cable, and Ua is the vertical displacement of stockbridge damper wire clamp, and Xa is the vertical displacement of tup center of gravity O, and φ a is the angular displacement that tup rotates around center of gravity O.Can obtain two resonance frequencys thus: a lower frequency, weight are that the center moves up and down with the A point; A higher frequency, weight itself rotates around center of gravity O.Obviously, if O-O ¹Distance go to zero, then stockbridge damper will rotate around fixing point.Two frequency f of stockbridge damper ₂With f ₁Ratio be generally 3 to 5, the form of this motion is the motion of two degrees of freedom, for the purpose of a change, in analysis (being divided into a frequency vibration and two frequency vibrations) is considered in these two kinds of motions respectively, becomes the motion of two single-degree-of-freedoms.

Apart from difference, we can obtain 2 different frequencies again to central point for the weight of two tups and two tups, and like this, the novel vibration resistant hammer can obtain four resonance frequencys.

Anticorona design: corona mainly is because its surface potential gradient has surpassed critical value on the gold utensil, thereby air is produced due to the ionization.The critical potential gradient value of the therefore anticorona surface potential gradient that will reduce gold utensil exactly by every means, or raising generation corona.The anticorona design that takes into full account gold utensil itself under these circumstances seems even more important.Anticorona specific to this damping stockbridge damper mainly relies on the moulding of itself, the wire clamp chuck position of commute corona, employing adds larger radius of curvature, and jaw face is made orthodrome handle, cause the critical potential gradient value of corona thereby reduce, so that effectively reduce the chance that corona produces.

Claims (2)

1. a novel vibration resistant is hammered into shape, comprise wire clamp (2), steel hinge line (3) and tup, wire clamp (2) is fixed on steel hinge line (3) middle part, the two ends of steel hinge line (3) are fixed with tup, it is characterized in that: described tup is divided into big tup (1) and little tup (4), and big tup (1) is 1.2～2 times of little tup (4) weight.

2. novel vibration resistant hammer according to claim 1 is characterized in that: the center of gravity of big tup (1) arrives the distance 0～100mm at wire clamp (1) center than the center of gravity of little tup (4) to the distance at wire clamp (2) center.

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