CN2708047Y

CN2708047Y - Cone shaped spiral sealing device

Info

Publication number: CN2708047Y
Application number: CN 200420042184
Authority: CN
Inventors: 侯顺利
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-07-14
Filing date: 2004-07-14
Publication date: 2005-07-06
Anticipated expiration: 2014-07-14

Abstract

The utility model relates to a cone spiral sealing device that is used for various paper pulp equipment or other viscous fluid equipment. The cone spiral sealing device is that a cone shaft sleeve (1) is fixed on the rotary shaft of the equipment; the external surface of the cone shaft sleeve is provided with a spiral groove; a cone external sleeve (2) is inlaid in the shaft hole of the equipment; the internal surface of the cone external sleeve is smooth; an appropriate gap is arranged between the shaft sleeve and the external sleeve. The position of the external sleeve can be adjusted by a screw (3) and a nut (4) to adjust the size of the gap. When the shaft sleeve follows the rotary shaft to rotate at high speed along some direction, the internal cone surfaces of the spiral side wall and the external sleeve simultaneously make the medium generate pressure head; when the pressure head produced balances with the pressure of the medium in the equipment, the leakage of the medium can be prevented. The sealing surface is designed in cone shape, the size of the sealing gap can be changed by moving the external sleeve, therefore the sealing performance is controlled, and the different sealing requirements are satisfied. The cone spiral sealing device has small power consumption and minimum abrasion, and has machine stopping and sealing functions, since the deposition of the fibers can clog the gap, when the cone spiral sealing device is used for sealing the paper pulp equipment.

Description

The cone screw seal arrangement

Technical field

The utility model relates to fluid-tight, is a kind of seal arrangement that can be used for multiple paper pulp equipment or other viscous fluid equipment.

Background technique

Using a large amount of pulp type (conveying of paper pulp, storage and processing) equipment in the pulping and paper-making factory,, generally all needing to be provided with rotating shaft sealing as the stirrer of stock pump, stock tank, pulp cleaner, aquapulper etc.The at present material filling type rotating shaft sealings that use of pulping and papermaking equipments more.Though and packing seal is simple in structure, because of the friction and wear effect between axle and the filler is big, not only power consumpiton is big, and amount of maintenance is also big.Equipment that has such as the stock pump power that only seal arrangement consumed even account for 1/3 of air horsepower.

The pulping and papermaking equipments that also has adopts end face seal.Its rubbing action is less, and power consumpiton is lower, but complex structure, cost is higher, in case fiber in the slurry or solid particle engaging friction face can cause quick wearing and tearing; And when sealing surface takes place to destroy, must the hard stop maintenance.

Spiral seal belongs to the non-contact sealing, also cries the mucus sealing, and power consumpiton is little, and seal life is long.The mucus that general spiral seal is used is full-bodied oil, and the garden of employing cylindricality helicoid structure, and the shortcoming of this structure is that in use sealing effect is uncontrollable, and should dispose and shut down sealing.Paper pulp also belongs to viscous fluid, and its concentration high viscosity more is also big more, can adopt spiral seal, but does not also have the practical application of this respect at present.

Summary of the invention

In order to overcome paper pulp or other viscous fluid equipment seal arrangement power consumpitons and the big shortcoming of amount of maintenance, the utility model proposes a kind of cone screw seal arrangement.This device belongs to the non-contact sealing, owing to do not have direct friction and abrasive action between rotating part and the stationary components, thereby the power that seal arrangement consumes is little, and seal life is long, safeguards simple.

The technological scheme that its technical problem that solves the utility model adopts is: outer surface is processed with the spiral fluted conical shaft is locked in the rotating shaft of the equipment of being enclosed within, itself and rotating shaft are rotated synchronously.The conical overcoat of smooth interior surfaces is embedded in the axis hole of equipment and keeps static, keep suitable gap between cone screw axle sleeve and the overcoat.Can make the position move left and right of overcoat by adjusting screw and nut, to realize the adjusting of seal clearance size.Medium in the equipment is under certain pressure, can be along the outside seepage in gap between axle sleeve and the overcoat, and enter in the spiral chute, when axle sleeve with rotating shaft during along a certain direction high speed rotating, the spiral sidewall applies an end thrust to medium, make the medium in the spiral chute obtain pressure head, simultaneously because medium is being made circular movement, the inner conical surface of overcoat also produces an end thrust and pressure head to the medium in the gap, when the pressure of medium in these two pressure heads and the equipment balances each other, just can stop the leakage of medium in the equipment.Because the size of seal clearance is the key factor that influences sealing effect, therefore sealing surface is designed to taper, can change the size of seal clearance by the translation overcoat, thereby regulate sealing effect and satisfy different seal requests.Fiber in the paper pulp has the character of precipitation in addition; therefore can not dispose additional shutdown sealing during as the sealing of pulp type equipment; as long as be adjusted to a suitable little gap, the fiber when not rotating (shutdown) in rotating shaft in the paper pulp can block the slit, thus the sealing when realize shutting down.

The beneficial effects of the utility model are:

1. can reduce requirement on machining accuracy to Sealing;

2. can regulate sealing effect, to adapt to different service conditions;

3. after sealing surface in use weares and teares, can prolong part life by the method for regulating the gap;

When 4. medium was made centrifugal motion, the axial thrust load of generation helped to improve sealing effect;

5. can be adjusted to a suitable little gap, allow the fiber in the paper pulp block the slit when not rotating (shutdown), thereby the sealing when realizing shutting down can not disposed additional shutdown sealing during as the sealing of pulp type equipment in rotating shaft.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is plan view (analysing and observe).

Fig. 2 is the A-A sectional drawing.

1. conical axle sleeves among the figure, 2. overcoat, 3. screw, 4. nut.

Embodiment

As shown in Figure 1, outer surface is processed with the conical axle sleeve of spiral fluted (1) tightly is enclosed within the rotating shaft of equipment, and clamp, make tapered hub left and right sides fixed-site and rotate synchronously with rotating shaft by rotary component in the shaft shoulder and the equipment.The conical overcoat (2) of smooth interior surfaces is embedded in the axis hole of equipment with suitable tolerance fit, and keeps state of rest.Keep suitable gap between cone screw axle sleeve and the overcoat.Screw (3) is the Full Thread FT stud bolt, and an end is screwed in the screw of apparatus casing, then with the flange that steps up overcoat about two nuts.By two nuts (4) about rotating in the same way, the position of overcoat is moved to the left or to the right, to realize the adjusting of seal clearance size.Device left side contacts with medium in the equipment, and the right side contacts with the external world.

The medium in (left side) is under certain pressure in the equipment, meeting is outside (right side) seepage along the gap between tapered hub (1) and the overcoat (2), and enter in the spiral chute, when axle sleeve with rotating shaft during along a certain direction high speed rotating, the pressure head that the inner conical surface of spiral sidewall and overcoat makes medium produce simultaneously, when the pressure of medium in pressure head that produces and the equipment balances each other, just can stop the leakage of medium in the equipment, to reach the effect of sealing.Can change the size of seal clearance by the translation overcoat, thereby regulate sealing effect and satisfy different seal requests.For new installed device, can be adjusted to a gap that size is suitable according to the difference of the factors such as requirement of the viscosity of the rotating speed of the pressure in the equipment, rotating shaft, medium, leakage rate.For using used equipment more of a specified duration, after the outer surface of cone screw axle sleeve or the internal surface of overcoat produce wearing and tearing, because of the gap between cone screw axle sleeve and the overcoat becomes conference sealing effect can be descended, this is can be by the position of mobile overcoat, readjust a suitable gap, thereby the life-span of seal arrangement is prolonged.

When the utility model is applied to paper pulp equipment; when equipment shuts down; sometimes also has paper pulp in the equipment; this is that slurry pulp can be along the outside seepage in gap between cone screw cover and the overcoat; after producing small leakage; fiber in the paper pulp can block the slit, stops the further leakage of paper pulp automatically, thereby realizes shutting down sealing.

Claims

A kind of cone screw seal arrangement, it by outer surface have the conical rotary sleeve (1) of spiral, static overcoat (2), screw (3), the nut (4) that internal surface is taper formed, the outer surface that it is characterized in that spiral sleeve (1) is taper, the internal surface of overcoat (2) is taper, form conical seal (contact) face, the size of seal clearance can be regulated.