CN1330892C

CN1330892C - Purely mechanical on-line dynamic balancing head

Info

Publication number: CN1330892C
Application number: CNB2005100492312A
Authority: CN
Inventors: 曾胜; 张加庆
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2005-01-26
Filing date: 2005-01-26
Publication date: 2007-08-08
Anticipated expiration: 2025-01-26
Also published as: CN1654849A

Abstract

The present invention relates to a purely mechanical online dynamic balance head which comprises a rotary component and a static component, wherein the rotary component is formed by superposing two cover plates, four guiding plates and three guard plates into a cylinder, the three guard plates are respectively clamped by two guiding plates; four mutually interdependent cavities are uniformly distributed along the circumferential direction in the cylinder; the static component is composed of an inner cylinder, a middle cylinder and an outer cylinder, wherein the inner cylinder, the middle cylinder and the outer cylinder are sheathed by a coaxial line; the middle cylinder is provided with four parallel spiral slide ways, and the upper port and the lower port of each spiral slide way are respectively communicated with holes of the upper row and the lower row of the outer cylinder; one end of the static component is fixed to a bracket, the other end of the bracket extends into the central hole of the rotating cylinder, and a gap exists between the two ends; the four holes of the lower row of the outer cylinder are respectively corresponding to the four cavities of the rotating cylinder. In the running process, by filling different amounts of steel balls into the different cavities of the rotating component from the spiral sliding ways of the static component, the mass distribution of the rotating component can be adjusted to realize online dynamic balance. The present invention has the advantages of simple structure and long service life.

Description

A kind of Purely mechanical on-line dynamic balancing head

Technical field

The present invention relates to a kind of dynamic balancing head that is used for the rotating machinery on-line dynamic balancing.

Background technique

Dynamic balancing technique occupies critical role in rotating machinery.Owing to reasons such as design, processing, transportation, installation, material behaviors, rotating machinery is easy to produce initial unbalance; Rotatable parts breakage in the running, peel off also and can cause bigger imbalance.Rotor unbalance will produce tangible power frequency vibration, influence the normal operation of rotating machinery.In case vibration exceeding the standard just need carry out dynamic balancing to rotor.At present, the dynamic balancing technique that comprises the high speed rotor of flexible rotor has developed very ripely.But the adjustment process repeatedly that the dynamic balancing process that is adopted is a test mass, increase the weight of requires start-stop car continually, spends more manpower, financial resources and time.On-line dynamic balancing is a good method of head it off.

General on-line dynamic balancing system mainly comprises two-part: a part is mounted in the dynamic balancing head that is balanced on the machine rotors, and another part is a controller.Controller comprises sensor and interlock circuit, driver, control software etc.With regard to state-of-the art, controller part is very ripe, and a large amount of work mainly concentrates on how to design simple in structure, a reliable and dynamic balancing head cheaply.

Mainly contain the dynamic balancing head of three kinds of main flows at present: motor-driven machinery dynamic balancing head, liquid-spraying type dynamic balancing head and electromagnetic type dynamic balancing head.In first kind of motor-driven machinery dynamic balancing head, two motors are arranged.Every motor connects counterweight by screw mandrel or gear separately.The driving power and the control signal of motor are transmitted by slip ring.Come mobile counterweight just can produce suitable correction mass by the control motor.In second, in the liquid-spraying type balancing head, four fan-shaped cavitys are arranged.Other has four nozzles, fan-shaped cavity of each nozzle alignment.Arrive suitable cavity by the liquid that sprays suitable quality, just can produce the correction mass of expection.In the third electromagnetic type balancing head, two or three sliding plates are arranged, counterweight is arranged on every sliding plate and can be under the effect of external force circumferentially rotate.External force is the electromagnetic force that electromagnetic coil energising back produces.Thereby the control electromagnetic force just can move on to sliding plate appointed positions and produce the correction mass of wishing.The use occasion of these three kinds of balancing heads is all restricted, generally all is used on the machine with stiffness rotor, and also restricted to the ambient temperature of using.

Summary of the invention

The purpose of this invention is to provide a kind of simple in structure, reliable, Purely mechanical on-line dynamic balancing head that cost is low.

Purely mechanical on-line dynamic balancing head of the present invention, it is characterized in that comprising rotatable parts and static part two-part, rotatable parts are by two cover plates, four guide plates and three are clipped in the cylindrical body that two plate washers between guide plate repeatedly are set to one respectively, its cover plate has the identical center hole of diameter respectively with each plate washer, edge, plane at every plate washer circumferentially is evenly equipped with four holes, the center of every guide plate has eccentric circle, eccentric diameter of a circle is greater than the aperture of cover plate and plate washer center hole, edge, plane at every guide plate circumferentially is evenly equipped with four holes, eccentric circle is connected with one of them hole by guide slide, the last relatively successively guide plate of every guide plate in the rotatable parts cylindrical body clockwise rotates 90 degree, four holes of guide plate are communicated with four holes of plate washer respectively, form inner separate and circumferential four the uniform cavity volumes in edge of cylindrical body, static part is the inner core of being fitted and being nested with by coaxial line, middle tube and urceolus are formed, on middle tube, have four parallel helical slideways, on urceolus, have eight circular holes of two rows, wherein four circular holes of the row of going up are communicated with the upper end-hole of four parallel helical slideways respectively, arranging four circular holes down is connected with the lower end mouth of four parallel helical slideways respectively, one end of static part is fixed on the support, the other end stretches in the cylindrical center hole of rotatable parts and also and between center hole leaves the gap, insert four circular holes on the urceolus in the center hole respectively with repeatedly to put the eccentric guiding groove that forms by guide plate and baffle plate or cover plate corresponding, the cylindrical end face of rotatable parts is fixed with coupling disc, and coupling disc and rotating shaft are fastening.

In order to the storage steel ball, static part is fixed on the support along four circumferentially uniform cavity volumes that are mutually independent in on-line dynamic balancing head rotatable parts inside, is used for throwing steel ball to the different cavity volume of rotary component.In the running, driven by motor rotating shaft and the balancing head rotatable parts that are installed in the rotating shaft rotate, the circular hole of arranging on the static part urceolus adds steel ball, steel ball is in spiral slideway enters the different cavity volume of rotary component, by mass distribution from rotary component to the steel ball of different cavity volume filling varying numbers that can regulate, thereby realize on-line dynamic balancing.

On-line dynamic balancing head based on Design of Mechanical Structure of the present invention does not need to the rotating part power supply, and stability is quite high.This on-line dynamic balancing header structure is simple and the life-span is longer, and the steel ball size is optional, and each quality that increases the weight of is easily transferred, and makes dynamic balance accuracy control easily.This balancing head can be used for the high temperature occasion.

Description of drawings

Fig. 1 is the mechanical on-line dynamic balancing head schematic representation;

Fig. 2 is the guide plate schematic representation;

Fig. 3 is the baffle plate schematic representation;

Fig. 4 is the cover plate schematic representation;

Fig. 5 is the exploded view of rotary component.

Embodiment

With reference to Fig. 1, Purely mechanical on-line dynamic balancing head of the present invention comprises rotatable parts and static part two-part, rotatable parts are the cylindrical bodys that repeatedly are set to one by the plate washer 5 that two cover plates 3, four guide plates 4 and three are clipped in 4 of two guide plates respectively, the shape of each plate such as Fig. 2, Fig. 3, shown in Figure 4, be generally circular aluminium sheet.

Cover plate 3 has the identical center hole in aperture 12 and 17 respectively with each plate washer 5, edge, plane at every plate washer 5 circumferentially is evenly equipped with four holes 18, the center of every guide plate 4 has eccentric circle 14, the diameter of eccentric circle 14 is greater than the aperture of cover plate 3 and plate washer 5 center holes, edge, plane at every guide plate 4 circumferentially is evenly equipped with four holes 13, and eccentric circle 14 is connected with one of them hole 13 by guide slide 15.The relative rigging position of nine blocks of plates as shown in Figure 5, two cover plates 3 are respectively at cylindrical two ends, second relative first guide plate of guide plate clockwise rotated 90 degree, by that analogy, from left to right, the every last relatively successively guide plate of guide plate clockwise rotates 90 degree and places, so each guide slide 15 differs 90 degree successively clockwise.Place baffle plate between per two guide plates, form the structure of three baffle plates of four guiding plate holders, repeatedly put the balancing head of formation in this way, four holes 13 of its guide plate 4 are communicated with four holes 18 of plate washer 5 respectively, and having four 90 degree cavity volume at interval, each cavity volume is communicated with a guide slide.Because the guide plate center circle at this slideway place is the eccentric circle of a radius greater than baffle plate or cover plate center circle, the baffle plate on it and both sides or cover plate form the eccentric guiding groove of one 360 degree circumference, therefore the steel ball that enters this eccentric guiding groove is easy to enter guide slide 15 along guiding groove, finally enters reservoir body.Steel ball skids off reservoir body from guide slide when steel ball is trapped in the neutralization of eccentric guiding groove and avoids shutting down; can adopt permanent magnet is set in cavity volume; i.e. device permanent magnet 19 in the hole 18 of the hole 13 of every guide plate 4 and plate washer 5, being used to fix has fallen into the steel ball of cavity volume.

Static part is the inner core 10 of being fitted and being nested with by coaxial line, middle tube 7 and urceolus 6 are formed, on middle tube 7, have four parallel helical slideways 8, on urceolus 6, have eight circular holes 9 of two rows, wherein four circular holes 9 of the row of going up are communicated with the upper end-hole of four parallel helical slideways 8 respectively, arranging four circular holes 9 down is connected with the lower end mouth of four parallel helical slideways 8 respectively, one end of static part is fixed on the support 11, the other end stretches in the center hole of rotating cylinder, the external diameter of static part urceolus 6 is smaller than the diameter of rotatable parts cylindrical body center hole, leave the gap, so that rotatable parts when rotating, guarantee that both do not bump and rub.Four circular holes 9 of following row on the urceolus 6 are corresponding with the eccentric guiding groove that baffle plate or cover plate form with guide plate respectively, and the external diameter of the used steel ball of balancing head should be big than the gap of static part and rotatable parts, to avoid the generation of steel-fastening pearl incident.Be fixed with coupling disc 2 at the cylindrical end face of rotatable parts, coupling disc 2 is fastening with rotating shaft 1, and rotating shaft 1 runs through static part inner core 10 and is bearing on the bearing.

Claims

1. Purely mechanical on-line dynamic balancing head, it is characterized in that comprising rotatable parts and static part two-part, rotatable parts are by two cover plates (3), four guide plates (4) and three plate washers (5) that are clipped in respectively between two guide plates (4) repeatedly are set to the cylindrical body of one, its cover plate (3) has the identical center hole of diameter respectively with each plate washer (5), edge, plane at every plate washer (5) circumferentially is evenly equipped with four holes (18), the center of every guide plate (4) has eccentric circle (14), the diameter of eccentric circle (14) is greater than the aperture of cover plate (3) and plate washer (5) center hole, edge, plane at every guide plate (4) circumferentially is evenly equipped with four holes (13), eccentric circle (14) is connected with one of them hole (13) by guide slide (15), the last relatively successively guide plate of every guide plate in the rotatable parts cylindrical body clockwise rotates 90 degree, four holes (13) of guide plate (4) are communicated with four holes (18) of plate washer (5) respectively, form inner separate and circumferentially uniform four cavity volumes in edge of cylindrical body in order to the storage steel ball, the static part that is used for throwing to four cavity volumes of rotatable parts steel balls is the inner core (10) of being fitted and being nested with by coaxial line, middle tube (7) and urceolus (6) are formed, on middle tube (7), have four parallel helical slideways (8), on urceolus (6), have eight circular holes of two rows (9), wherein four of the rows of going up add circular hole (9) the upper end-hole connection of parallel helical slideway with four (8) respectively of steel ball, arrange down four circular holes (9) respectively the lower end mouth of parallel helical slideway with four (8) be connected, one end of static part is fixed on the support (11), the other end stretches in the cylindrical center hole of rotatable parts and also and between center hole leaves the gap, insert four circular holes (9) on the urceolus (6) in the center hole respectively with repeatedly to put the eccentric guiding groove that forms by guide plate and baffle plate or cover plate corresponding, the cylindrical end face of rotatable parts is fixed with coupling disc (2), and coupling disc (2) is fastening with rotating shaft (1).

2. Purely mechanical on-line dynamic balancing head according to claim 1 is characterized in that in four separate in rotatable parts cylindrical body cavity volumes that device has permanent magnet (19) respectively.