CN2188110Y

CN2188110Y - Static pressure support controllable medium-high roller mechanism of papermaking calender

Info

Publication number: CN2188110Y
Application number: CN 94214601
Authority: CN
Inventors: 诸葛宝钧
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-06-21
Filing date: 1994-06-21
Publication date: 1995-01-25
Anticipated expiration: 2004-06-21

Abstract

A static pressure support controllable medium and high roller mechanism of a papermaking calender comprises a spherical support, a mandrel, a roller shell and the like; the core shaft is fixed, the roller shell rotates around the core shaft through rolling bearings at two ends of the roller shell, and a hydraulic pump station and an electric control console are controlled along a certain deflection change of the bus direction; on the mandrel with I-shaped section, several longitudinally arranged holes are formed opposite to the direction of pressed zone, and it and top-pressing piston and sealing element mounted in them form high-pressure oil cavity, the pressure oil can be passed through the oil hole of side tube of mandrel, and can be grouped and fed into the high-pressure oil cavity of small end of top-pressing piston, and its large end has curved surface which can be pressed against the roller shell and can be kept in controlled middle-high and matched with inner hole of roller shell; the novel sectional control calender roll has the advantages of high and medium height, advanced structure, convenient processing and low cost.

Description

Controllable hydrostatic supported mid/high roller mechanism for roll presses for paper industry

The utility model relates to a kind of papermaking equipment equipment that is applicable to, as a kind of mechanism of common calender, supercalender, single nip calender, soft press-polishing machine, relates to roll presses for paper industry hydrostatic support crown controlled roll mechanism specifically, belongs to the D21G1/02 class.

At present, the paper felt wrapped roll mechanism that various calender is used always in paper industry, in when operation owing to be subjected to bus (one-sided line) direction well-distributed pressure load along cylindric roller, be supporting because of the roller two ends again, according to material power principle, form a sag curve along the roller total length, and the amount of deflection maximum of the center distortion, thereby influence the quality of paper press polish.The one-sided line of roller when Fig. 1 promptly represents calender work, roller bending status schematic diagram when its pressure evenly distributes along axis.In order to overcome this shortcoming, at present the domestic way of generally taking is according to issuable sag curve, the roller design be made into the cydariform of what is called " middle height ", promptly common " middle height " roller mechanism, because of its " middle height " along the roller bus can not change, be called " fixedly crowned roll " again again.Fig. 2 promptly is illustrated under the uniform load q effect, " middle height " suitable roller, and at compression-side total length b, axial length is approximately L, and formed sag curve is a straight line.The shortcoming of said mechanism is that for the roller of certain size, the size of its " middle height " can not be consistent with the linear pressure load that paper technology requires.Because technological reason, when needing to change the linear pressure load, the linear pressure that paper web is subjected to by roller is uneven.The uniform load of (referring to Fig. 3) former imagination is that big centre, two ends is little when the load of adjacent rollers transmission is excessive; The uniform load of (referring to Fig. 4) former imagination is broad in the middle small in ends when the load of adjacent rollers transmission is too small.Above-mentioned two kinds of situations all influence the web calendered effect.In order to overcome the shortcoming of this what is called " high in fixing ", Germany Ju Sitaiersi (K ü sters) company has developed the change that a kind of " dancer " (referring to Fig. 5) is characterized in the roll surface amount of deflection on the pressurized total length, be by corrective action in roller shell inwall, equal in length realizes in the oil pressure of the whole oil pocket of compressive region.Along with the change of oil pressure, " the middle height " of compressive region roll surface changes according to certain rules, and its bolster transfixion roller shell of this class crown controlled roll is under liquid supporting, and the bearing rotation by two ends.The shortcoming of this structure is, amount of deflection that can not segmentation control compressive region, and oil pocket sealing, processing and manufacturing difficulty, cost costliness.

The purpose of this utility model is at above-mentioned deficiency, provides a kind of and can solve that high in " felt wrapped roll " " out of contior shortcoming can arbitrarily be controlled certain a bit of amount of deflection again on the felt wrapped roll total length, structure advanced person is easy to processing, and cost of manufacture is low.

The purpose of this utility model is achieved in that the utility model roll presses for paper industry crown controlled roll mechanism, comprise that its two ends are loaded on the mandrel of self-aligning spherical support, ring cooperates with mandrel in the rolling bearing, outer shroud cooperates with roller shell endoporus, mandrel is motionless, the roller shell rotates around mandrel by the bearing at its two ends, control along its generatrix direction segment amount of deflection variation, be hydraulic power unit and electrical control panel, its design feature is: the several holes that is processed with vertical arrangement on the mandrel of i shaped cross section facing to compressive region, it forms high-voltage oil cavity with roof pressure piston that is mounted in it and seal, pressure oil is by the oilhole and the oil pipe of mandrel side, grouping is to roof pressure piston small end high-voltage oil cavity fuel feeding, the curved surface of the big end of roof pressure piston and roller shell endoporus wall match, the big end curved surface of roof pressure piston has several holes of oil pocket with oil sealing limit, the porose and flow controller connection high-voltage oil cavity in each oil pocket hole.

Grouping is by hydraulic power unit and electrical control panel to roof pressure piston high-voltage oil cavity fuel feeding.

The roller shell is made composite bed by cast iron, and the cylindrical working face has the wear-resisting chill of certain thickness, and the remainder mechanism performance is identical with grey cast-iron.

Owing to adopt such scheme, the utility model hydrostatic support crown controlled roll has following advantage: (1) the utility model is by the roller shell of rotation, fixing mandrel, vertically arrange several roof pressure pistons and high-voltage oil cavity and the flow controller etc. installed on the mandrel and constitute the hydrostatic support system, thereby solved the shortcoming of " fixed crowned roll " high in can not the controlling that domestic paper industry uses, also overcome foreign paper industry " dancer " can not segmentation control compressive region total length on the shortcoming of a certain section camber; (2) roller shell employing material is a chilled cast iron, and superficies have certain thickness high hardness wear-resisting chill, and the performance of other parts is equivalent to plain cast iron, and is cheap.

Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.

Fig. 1 be the one-sided linear pressure of expression calender when work roller along axis direction the uniform and crooked situation schematic diagram of roller.

Fig. 2 is illustrated under the uniform load effect, and the suitable sag curve that forms in the compression-side total length of middle height is the schematic diagram of straight line.

Fig. 3 is when representing that the load that transmits when adjacent roller is excessive, the distribution situation of load.

Fig. 4 is the distribution situation of expression load when the load of adjacent roller transmission is too small.

Fig. 5 is the dancer schematic diagram.

Fig. 6 is Fig. 5 AA direction view profile.

Fig. 7 is the utility model roll presses for paper industry hydrostatic support crown controlled roll schematic diagram.

Fig. 8 is the roller sectional drawing of Fig. 7 hydrostatic support system.

As Fig. 7, shown in 8, the utility model roll presses for paper industry hydrostatic support crown controlled roll mechanism, it is the mandrel 2 that is loaded on self-aligning spherical support 1 by two ends, ring and mandrel 2 tight fits in the rolling bearing 3, outer shroud with roll shell 4 endoporus tight fits, mandrel 2 is motionless, roller shell 4 rotates around mandrel 2 by the bearing 3 at its two ends, amount of deflection along the arbitrary segment of its generatrix direction changes ground control, be by by self-aligning spherical support 1, mandrel 2, rolling bearing 3, roller shell 4, roof pressure piston 5, high-voltage oil cavity 6, oil return apparatus 7, the hydrostatic support system that flow controller 9 grades constitute, hydraulic oil is organized roof pressure piston fuel feeding or oil return through the oil pipe 11 of mandrel 2 both sides to each, and charge oil pressure is controlled by hydraulic power unit 13 and electrical control panel 14.On mandrel i shaped cross section 2, be processed with several oilhole 201 they and roof pressure piston 5 that is mounted in it and seal 12 formation high-voltage oil cavities 6 of vertical arrangement facing to the compressive region direction.The roof pressure piston 5 of band seal is mushroom, and the endoporus of its big end curved surface and roller shell 4 matches, and has several holes of oil pocket with oil sealing limit 10 8, and each You Keng chamber is porose, connects high-voltage oil cavity 6 by flow controller 9.Oil pressure passes to roller shell 4 inwalls by roof pressure piston 5, the nip load of opposing roller shell outside.When high-voltage oil cavity 6 fed pressure oil, roof pressure piston 5 was pressed to roller shell 4 inwalls, and pressure oil flows out through the slit of oil sealing limit 10 around the oil pocket anti-8 and the formation of roller shell inwall then through flow controller 9 step-downs.Oil pressure was reduced to atmospheric pressure and was got back to hydraulic power unit 13 through oil return apparatus 7 this moment.The lamination layer structure that roller shell 4 adopts chilled cast iron to constitute, superficies have certain thickness high hardness wear-resisting chill, and other parts are equivalent to plain cast iron.

The utility model is compared with dancer shown in Fig. 5,6, its roller shell 23, be bearing on the mandrel 21 by bearing 22, two edge face sealing members 25 on the mandrel and axial seal 24 are the cavity separated into two parts of roller shell and axle, epicoele 26 enters hydraulic oil, cavity of resorption 7 oil returns change the amount of deflection that upper and lower two shin oil pressure differences can change compressive region roller shell.This structure can not be accomplished, carries out the size of segmentation control amount of deflection (middle height) on demand.

Claims

1, a kind of roll presses for paper industry hydrostatic support crown controlled roll mechanism, comprise that its two ends are loaded on the mandrel of self-aligning spherical support (1) (2), ring and mandrel (2) tight fit in the rolling bearing (3), outer shroud and roller shell (4) endoporus tight fit, mandrel (2) is motionless, roller shell (4) rotates around mandrel (2) by the bearing (3) at its two ends, control along its generatrix direction segment amount of deflection variation, be hydraulic power unit (13) and electrical control panel (14), it is characterized in that: the mandrel of i shaped cross section (2) is gone up facing to compressive region, the several holes (201) that vertical arrangement is arranged, it forms high-voltage oil cavity (6) with roof pressure piston (5) that is mounted in it and seal (12), pressure oil is by the oilhole and the oil pipe (11) of mandrel side, and grouping is to roof pressure piston (5) small end high-voltage oil cavity fuel feeding, and the curved surface of the big end of roof pressure piston and roller shell endoporus match.

2, according to the described roll presses for paper industry crown controlled roll of claim 1 mechanism, it is characterized in that: the big end curved surface of described roof pressure piston (5) has several holes of oil pocket with oil sealing limit (10) (8), porose and flow controller (9) the connection high-voltage oil cavity (6) in each oil pocket hole.

3, according to the described roll presses for paper industry crown controlled roll of claim 1 mechanism, it is characterized in that: grouping is by hydraulic power unit and electrical control panel to roof pressure piston high-voltage oil cavity fuel feeding.

4, according to the described roll presses for paper industry crown controlled roll of claim 1 mechanism, it is characterized in that: described roller shell (4) is made composite bed cylindrical working face by cast iron the wear-resisting chill of certain thickness, and the remainder mechanical performance is identical with grey cast-iron.