CN201427133Y - Triaxial power balancing device of high-speed pipe cold mill - Google Patents

Abstract

The utility model relates to a triaxial power balancing device of a high-speed pipe cold mill, which is characterized by comprising a driving shaft, a crank shaft, a balancing shaft, a small balancingblock, a large balancing block, a transmission gear, a crank pin and a rack. When the high-speed pipe cold mill works, six balancing blocks positioned at both sides of a centre line of the triaxial power balancing device are used for balancing the inertia force of the working rack and the centrifugal force among the balancing blocks. The utility model not only greatly reduces the acting force ofthe rack inertia force on equipment and equipment base when the pipe cold mill rotates at high speed and increases the reciprocating speed of the pipe cold mill and the productivity of the pipe cold mill, but also reduces the investment cost of the civil foundation of the equipment.

Description

Three dynamic balancers on the high speed cold tube-rolling mill

Technical field

The utility model relates to a kind of dynamic balancer, particularly discloses three dynamic balancers on a kind of high speed cold tube-rolling mill.

Background technology

With reference to the pattern manufacturing of the cold tube-rolling mill of the former Soviet Union, its driven equilibrium device adopts simple crank block tactic pattern, no counterweight to the cold tube-rolling mill of China for a long time.Along with the per minute of cold tube-rolling mill frame moves back and forth increasing of number of times, the inertia force of milling train work housing increases greatly, the foundation of civil work that the bearing of this inertia force by crank axle is passed to equipment gets on, the per minute that has limited the frame of two roller cold tube-rolling mills moves back and forth the raising of number of times, and the production efficiency of leading is low.The KPW50LC type of present German SMSMeeR company and two roller cold-rolling mills of KPW75LC type adopt four balance weights to come the inertia force of balance work housing, but this balance mode produces the moment loading of a pair of alternation repeatedly inevitably on Equipment Foundations, the vibration of foundation is bigger, thereby foundation of civil work is had relatively high expectations.KPW50DMR (K) is to adopt four balance weights to come the inertia force of balance work housing with KPW75DMR (K) type two roller cold tube-rolling mills equally, but adopt the pattern of two limit balance weight reversed arrangement, the moment of alternation repeatedly and the moment of torsion of generation are all born by casing, do not bear by Equipment Foundations and do not resemble LC type milling train.The moment of inertia that the pattern that two roller cold tube-rolling mills of KPW18HMR (K) type and KPW25HMR (K) type adopt Gear Planet Transmission to add the complete equipilibrium of counterweight is come the inertia force and the rotary main shaft of balance work housing, balance quality is good, vibrate little, but this pattern only is only applicable to little work housing weight, thereby only is only applicable to the cold tube-rolling mill of small-sized specification.KPW100VMRK adopts the slide block direction of balance slide block to become 90 ° VE with the glide direction of frame with KPW125VMRK type two roller cold tube-rolling mills, the balance weight of the milling train of this pattern is the inertia force that produced of balance frame weight and slide block weight preferably, and balance moment of inertia on the most crank axle, but need very dark very expensive foundation of civil work.

France Vallourec company relies on the inertia force that centrifugal weights is come the balance work housing is installed on the power transmission shaft, but for avoiding producing a pair of bigger moment of alternation repeatedly, a pair of travelling gear and centrifugal weights adopt vertical layout, and a pair of travelling gear of two roller cold tube-rolling mills and the centrifugal weights that do not resemble German SMS MeeR adopt horizontally disposed pattern.

The domestic cold tube-rolling mill of China is a same position except large-sized rolling mills adopts crank-pin, but the glide direction of balance slide block becomes the design of 90 ° VE to also have outward when work housing is in preceding (back) extreme position balance slide block to be in the design of horizontal equilibrium in the centre position of stroke with the frame glide direction, this design is because the inertia force of horizontal equilibrium milling train work housing and slide block can not get good balance, so the rotating speed of crank axle is lower.The milling train of other pattern does not structurally all have the bascule of work housing inertia force, thereby can only be the cold tube-rolling mill of low-speed running.

The utility model content

The purpose of this utility model is that a kind of novel dynamic balancer will be provided, and discloses three dynamic balancers on a kind of high speed cold tube-rolling mill, to improve the production efficiency of milling train.

The utility model is achieved in that three dynamic balancers (hereinafter to be referred as three dynamic balancers) on the high speed cold tube-rolling mill, comprise: driving shaft, crank axle, trunnion shaft, little balance weight, big balance weight, travelling gear, crank-pin and frame, wherein respectively installing one in the center line both sides of driving shaft is installed on the bearing after connecting the parts that form by little balance weight with travelling gear, respectively install one in the center line both sides of crank axle and connect the parts that form with travelling gear by big balance weight by bearing, parts that formed by little balance weight and travelling gear connection are respectively installed by bearing in center line both sides at trunnion shaft, crank-pin is installed in travelling gear and connects in the pin-and-hole of the parts that form with big balance weight, and connects with frame by connecting rod.Described travelling gear is meshing with each other, large and small balance weight place in a straight line, all travelling gears are connected into an integral body strengthening the intensity of key connecting with balance weight respectively, and crank-pin, bearing are installed in the casing.

Its planform of above-described balance weight is: big balance weight is general sector structure, and little balance weight be the sector structure of middle band concave arc shape, with the size that reduces travelling gear and shortening travelling gear balance box length to reduce cost.

Three dynamic balancers of the present utility model compared with prior art, its major advantage is:

1, can balance frame inertia force, work housing inertia force can make the running speed of existing cold tube-rolling mill improve about 75% to the active force of equipment and Equipment Foundations when reducing work housing and running up.

2, alleviated the vibration on transmission balance box and basis, the transmission that makes machine is balance more.

3, adopt the little balance weight of the sector structure of middle band concave arc shape, reduced the size and shortening travelling gear balance box length of travelling gear, make compact conformation.

Description of drawings

Three dynamic balancer structural representations on Fig. 1, the high speed cold tube-rolling mill;

Three dynamic balancer fundamental diagrams on Fig. 2, the high speed cold tube-rolling mill.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is done further narration.

Three dynamic balancers on the high speed cold tube-rolling mill of the present utility model as shown in Figure 1 and Figure 2.Comprise driving shaft 4, crank axle 8, trunnion shaft 13, little balance weight, big balance weight 5, travelling gear, crank-pin 9 and frame 15, wherein respectively install in the center line both sides of driving shaft 4 one by little balance weight 1 be installed on the bearing 3 after travelling gear 2 connects the parts that form; Respectively install one in the center line both sides of crank axle 8 and connect the parts that form with travelling gear 6 by big balance weight 5 by bearing 7, respectively install one by bearing 12 in the center line both sides of trunnion shaft 13 and connect the parts that form by little balance weight 10 and travelling gear 11, crank-pin 9 is installed in and also passes through connecting rod 14 in travelling gear 6 connects the parts that form with big balance weight 5 the pin-and-hole and connect with frame 15.Travelling gear meshes each other during installation, and large and small balance weight place in a straight line.And with crank-pin 9, bearing 3,7,12 is installed in the casing.

According to above-mentioned embodiment, six balance weights on work housing and three axles have been formed a dynamic equilibrium mechanism, when three dynamic balancer work on the high speed cold tube-rolling mill, big in the center line both sides, little balance weight is used for the inertia force of balance work housing, when work housing 15 is in preceding (back) extreme position of stroke, the size balance piece turns to the inertia force of the horizontal level of (preceding) at last with balance work housing 15, four little balance weights 1 on two limits when work housing 15 is in the centre position of stroke on driving shaft 4 and the trunnion shaft 13 and 10 and center crank axle 8 on two big balance weights 5 all go to vertical direction but direction is all opposite, the centrifugal force that makes balance weight 5 broad in the middle and the little balance weight 1 in two limits equate with 10 centrifugal force sum, thereby avoid producing a pair of moment of alternation repeatedly that centrifugal force produced that resembles on the LC machine by balance weight.

Claims (2)

1, three dynamic balancers on a kind of high speed cold tube-rolling mill, it is characterized in that its device comprises driving shaft (4), crank axle (8), trunnion shaft (13), little balance weight, big balance weight (5), travelling gear, crank-pin (9) and frame (15), wherein respectively install in the center line both sides of driving shaft (4) one by little balance weight (1) be installed on the bearing (3) after travelling gear (2) connects the parts that form, respectively install one in the center line both sides of crank axle (8) and connect the parts that form with travelling gear (6) by big balance weight (5) by bearing (7), respectively by bearing (12) a little balance weight (10) is installed in the center line both sides of trunnion shaft (13) and travelling gear (11) connects the parts that form, crank-pin (9) is installed in and also passes through connecting rod (14) in travelling gear (6) connects the parts that form with big balance weight (5) the pin-and-hole and connect with frame (15).

2, three dynamic balancers on the high speed cold tube-rolling mill according to claim 1 is characterized in that big balance weight (5) is sector structure, and little balance weight (1) and (10) are the sector structure of middle band concave arc shape.

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