CN2095965U

CN2095965U - Damper for twisting vibration of rotary shaft

Info

Publication number: CN2095965U
Application number: CN 91214674
Authority: CN
Inventors: 唐一科; 顾乾坤
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 1991-06-27
Filing date: 1991-06-27
Publication date: 1992-02-12

Abstract

The utility model relates to a damper for twisting vibration of a rotary shaft, which is composed of a vibration damping part, an adjusting part and a supporting part, wherein, the vibration damping part is supported by two radial ball bearings. The supporting part rotates following a rotary shaft, and the damping and the rigidity parameter of a damping ring can be adjusted through the adjusting step of a screw thread of the adjusting part when the rotary shaft rotates. The damping ring can be conveniently replaced. In the process of rotation, the damping ring can be adjusted. The utility model can reduce twisting vibration amplitude of the rotary shaft and can exert the auxiliary supporting function. The utility model is suitable for damping vibration of twisting vibration of a rotary shaft of a machine and is especially suitable for damping vibration of twisting vibration of a cutter shaft of a boring machine, a milling machine and a deep hole drilling machine and other thin long shafts.

Description

Damper for twisting vibration of rotary shaft

The utility model is the vibration damping equipment of a kind of machine running shaft torsional vibration.

With regard to the vibration damping equipment of machine running shaft torsional vibration, existing technology is the forced torsional balancer of YXN300 series that Wuxi vibration damper company produces.This vibration damper mainly is applicable to the engine crankshaft vibration damping, and its spring damping link adopts forced rubber ring, not only can't adjust in the using process, and damage the back and change difficulty; The inertance element of vibration damper (damping ring) double as belt pulley overhangs and is installed in axle head, and its weight is all born by rotating shaft self, can strengthen the radial vibration of rotating shaft.Based on above reason, the type vibration damper is not suitable for the relatively poor elongated rotating shaft of radial rigidity, as the torsional vibration vibration damping problem of deep-hole drilling machine drilling rod axle etc.

The purpose of this utility model is to design and manufacture its damping ring weight and can't help rotating shaft self and bear, and its spring damping link is adjustable in the rotating shaft working procedure, and changes a kind of easily running shaft device for damping torsional vibration.

The utility model is by the vibration damping part, and adjustment member and supporting portion are formed.The vibration damping part is made of the damping ring ［ 10 ］ that is installed in the damping ring ［ 9 ］ on the running shaft and be contained on the damping ring, damping ring is made with nylon or fabroil material, its structure is three lobes awl watt formula or integral, flexible taper sleeve type, its endoporus is a cylinder, contact with running shaft, appearance is the conical surface, contacts with the damping ring inner conical surface.Damping ring cylinder iron or cast steel material make, inner conical surface contacts with damping ring, the outer surface two end part are installed in respectively on the radial ball bearing ［ 6 ］［ 12 ］ that links to each other with frame ［ 8 ］.In order to increase rotary inertia, can take to irritate lead etc. to damping ring and increase the weight of measure.The contact length of damping ring and damping ring is less than damping ring length.Adjust partly by the pressure ring that is installed in the damping ring two ends ［ 1 ］［ 17 ］, be contained in the loaded spring ［ 7 ］［ 11 ］ of this pressure ring annular end, be contained on the pressure ring cylinder and the thrust ball bearing that contacts with loaded spring ［ 3 ］［ 14 ］, be contained in the limit spring back-up ring ［ 2 ］［ 16 ］ on the pressure ring cylinder, contact with thrust ball bearing ［ 3 ］［ 14 ］ with flange ［ 5 ］［ a 13 ］ scyewed joint and an end, have the adjustment ring ［ 4 ］［ 15 ］ of adjusting the hole to constitute on the overhanging end flange side face.Adjust ring and make it along screw advancement by adjusting the hole, compressing thrust ball bearing and pressure ring, thus make damping ring along damping ring internal taper hole axial advancement, reach and adjust damping ring contacts degree of tightness with rotating shaft purpose.Adjust link for two about one cover vibration damping equipment is provided with, one makes damping ring locking, and one loosens damping ring.Supporting portion is fixed on the flange ［ 5 ］［ 13 ］ of frame ［ 8 ］ both ends of the surface by frame ［ 8 ］, and the radial ball bearing ［ 6 ］［ 12 ］ that is contained between damping ring ［ 10 ］ and the frame ［ 8 ］ constitutes.Radial ball bearing is bearing in damping ring in the frame, and the outer surface of frame is processed with the installing and locating face with rotating shaft center's frame or aiding support, to guarantee the correct installation of whole vibration damping equipment.Flange ［ 5 ］［ 13 ］ plays location and seal action to bearing on the one hand, and on the other hand, its endoporus has screw thread to cooperate with the adjustment ring, guarantees the proper functioning of adjustment member.

Fig. 1 is the utility model sectional view, owing to be symplex structure, so half in the axisymmetric of only having drawn, dotted line is by the center line of vibration damping running shaft among the figure.What constitute the vibration damping part has damping ring ［ 9 ］ and a damping ring ［ 10 ］; What constitute adjustment member has a pressure ring ［ 1 ］［ 17 ］, loaded spring ［ 7 ］［ 11 ］, thrust ball bearing ［ 3 ］［ 14 ］, limit spring back-up ring ［ 2 ］［ 16 ］ and adjust ring ［ 4 ］［ 15 ］.What constitute supporting portion has flange ［ 5 ］［ 13 ］, radial ball bearing ［ 6 ］［ 12 ］ and a frame ［ 8 ］.

The utility model is used for 3---during 15 meters deep-hole drilling machine drilling rod axle vibration dampings, frame localization part external diameter can be φ 200---φ 500mm, axial length can be 250---350mm, the supporting radial ball bearing can be selected GB276 for use---1000800 ultralights series bearing in 64, adjusting the link screw thread, can to select grade of accuracy for use be 2 grades common fine thread, and thrust-bearing is selected GB301 for use---8100 special thin bearings in 64.The damping ring internal diameter can make φ 20 according to drill pipe diameter---φ 70mm, φ 50---φ 110mm, φ 100---different series such as φ 160mm, and the contacting tapering and elect 6 ° 30 as of damping ring and damping ring '.

Technical characterstic of the present utility model is, its frame can be installed on rotating shaft center's frame or the aiding support, make vibration damping equipment both play the torsional oscillation damping effect, play the effect of general aiding support again, solved the not high slender axles torsional oscillation vibration damping problem of substantial radial rigidity, be used for the elongated cutter spindle vibration damping of lathe (particularly boring machine, milling machine, deep-hole drilling machine), can improve machine cut machining accuracy and working life.Its threaded adjustment device can carry out meticulous adjustment under by vibration damping running shaft working state, make vibration damping reach optimum efficiency.Three lobes awl watt formula or integral, flexible taper sleeve type damping ring are selected nylon or fabroil material for use, can satisfy the requirement of vibration damper to damping and stiffness parameters simultaneously, and damping property is good, and the bevel-type adjustable structure also has and changes advantage easily.In addition, to the rotating shaft in the certain size scope,, only need change the damping ring of different inner diameters as the cutter spindle in the different apertures of deep hole drill.

Claims

1, a kind of running shaft device for damping torsional vibration, by the vibration damping part, adjustment member and supporting portion are formed, it is characterized in that: the vibration damping part is made of the damping ring [10] that is installed in the damping ring [9] on the running shaft and be contained on the damping ring, the damping ring endoporus is that cylinder contacts with running shaft, appearance is that the conical surface contacts with the inner conical surface of damping ring, and the length of damping ring and damping ring surface of contact is less than the length of damping ring; Adjustment member is by the pressure ring that is installed in the damping ring two ends [1] [17], be contained in the loaded spring [7] [11] of this pressure ring annular end, be contained on the pressure ring cylinder and the thrust ball bearing that contacts with loaded spring [3] [14], be contained in the limit spring back-up ring [2] [16] on the pressure ring cylinder, and contact with thrust ball bearing [3] [14] with flange [5] [a 13] scyewed joint and an end, there is the adjustment ring [4] [15] of adjusting the hole to constitute on the overhanging end flange side face; Supporting portion is fixed on the flange [5] [13] of frame both ends of the surface by frame [8], and the radial ball bearing [6] [12] that is contained between damping ring [10] and the shell [8] constitutes; Radial ball bearing [6], [12] are bearing in damping ring [10] in the frame.