CN2392038Y

CN2392038Y - Sealing device for ball mill main shaft

Info

Publication number: CN2392038Y
Application number: CN 98242841
Authority: CN
Inventors: 祁增荣
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-12-02
Filing date: 1998-12-02
Publication date: 2000-08-16
Anticipated expiration: 2008-12-02

Abstract

A ball mill main shaft sealing device belongs to the sealing technical field. The rubber lip seal solves the problems that the conventional rubber lip seal is easy to wear a shaft neck, a bearing bush is burnt, equipment accidents are easy to cause, and the service life is short. The sealing device is combined and comprises a main sealing ring and an auxiliary sealing ring, the main sealing ring is formed by a special-shaped strip object around a shaft and is tightly attached to two ends of a bearing bush, and the auxiliary sealing ring and a gland are tightly pressed on two end faces of a bearing seat. A sealed cavity is formed between the two, and an oil return pipe is arranged at the lower part of the cavity. The leakage-proof bearing not only can effectively solve the leakage problem, but also can not cause the abrasion of the large shaft and the bearing bush, and has long service life.

Description

The big shaft sealer of pebble mill

The utility model belongs to the shaft sealing technical field.

Known to the claimant, the pebble mill of present break mined material matter pulverizing system, its macro-axis bearing shell thin oil lubricant is sealed with two kinds of forms: the wool felt packing seal and the rubber lip oil sealing (patent No.: ZL96231828.0).All there are some problems in actual use.Use the wool felt packing seal, after the felt oil absorption reaches capacity, seepage will take place, sealing effect is relatively poor.And when adopting the rubber lip seal, the seepage phenomenon solves substantially, but seal lip wearing and tearing axle journal, when especially breeze is sneaked into lip, the wearing and tearing aggravation, easily the scaling loss bearing shell causes equipment accident; And working life is short, must annually change, and strengthens maintenance cost.

The purpose of this utility model just provides the big shaft sealer of a kind of pebble mill rational in infrastructure, can effectively solve leakage problems, is unlikely to cause the wearing and tearing of macro-axis and bearing shell again, and prolong working life.

The utility model is design like this: seal arrangement is combined, is made up of major and minor seal ring; The primary seal circle is close to the bearing shell two ends of matching with axle, and secondary seal ring is pressed on the bearing support both ends of the surface by gland; Form Seal cage between the two, be provided with return tube in the cavity bottom.The primary seal circle is the special-shaped rectangular thing that rubber or macromolecular material are made, and is around on the axle during use, and makes the head and the tail bonding, forms seal ring.

Secondary seal ring is general sealing material, and its shape matches with the shape of end cap 1.

Make seal ring with rubber or other macromolecule chemical material, make static seal become motive sealing, and with main axis rotation, the axle journal bearing shell that do not wear and tear adopts the major-minor combination seal simultaneously, concentrate oil return.

The strip sealing joint strip is cemented fixing around main shaft one circle, and make a side, in additional end cap of opposite side and secondary sealing near bearing shell.When macro-axis rotates, the primary seal circle rotates thereupon, this moment, lubricant oil entered, and wherein major part drops down from oil outlet tube, after fraction flows out along gap between bearing shell and the macro-axis, stopped by the primary seal circle, part is got back to outflow tube, and part is attached on the primary seal, rotates with the axis, after being thrown away by centrifugal force, concentrate in the return tube.The minute quantity oil droplet that splashes is stopped by pair sealing again, gets back in the return tube.So just realized the purpose of effective leakage proof.Because primary seal is fixed on the macro-axis,, can not cause the wearing and tearing of this part again with the macro-axis rotation; The part that contacts with the bearing shell end face after forming certain interval, can further not worn and not torn, thereby has reached protection macro-axis bearing shell and the purpose that prolongs seal life.

The utility model has the advantages that and both stopped oily seepage, protected equipment again, installation is simple, convenient, and be 8--10 times of former oil sealing working life.

Be further described below in conjunction with accompanying drawing.

Fig. 1 installs and uses principle schematic for seal arrangement, wherein:

1. gland 2. secondary seal rings 3. primary seal circles 4. bearing shells 5. oil inlet pipes 6. bearing supports 7. return tubes 8. oil outlet tubes 9. macro-axis

Fig. 2 is the strip of a primary seal circle schematic representation in kind.

As can be seen from Figure 1, primary seal circle (3) is 90% intercepting of strip sealing material shown in Figure 2 being pressed macro-axis (9) girth, and on macro-axis (9), Bond is coated at two ends, slightly executes pulling force, makes both bonding, pushes then in the Seal cage, near bearing shell (4) end face.Load onto gland (1), between itself and bearing support (6) end face, add secondary seal ring (2).Open oiling valve,, further tighten gland (1) and go up attachment bolt (not drawing among the figure), till no oil leakage if any leakage.Seal cage bottom in bearing support (6) end face and gland (1) formation has oil collect port, is connected to return tube (7).

When macro-axis (9) rotated, lubricant oil flowed into from oil inlet pipe (5), enter bearing shell (4) inner chamber lubricated after, most ofly flow out through oil outlet tube (8), recycle.Fraction drops down along gap between bearing shell (4) and the macro-axis (9), this wherein a part keep off back by primary seal circle (3), partly adhered to by primary seal circle (3), along with rotation, got rid of to Seal cage by centrifugal force, concentratedly flow to return tube (7), enter oil outlet tube (8).The minute quantity oil droplet that splashes is stopped by secondary seal ring (2) and gland (1), and is same, enters in the return tube (7).In sum, successfully static sealing is changed into dynamic seal (packing), reached the purpose of sealing leakage proof by the utility model.As can be seen from Figure 1, primary seal circle (3) is fixing with macro-axis (9), and no relative movement can not cause the wearing and tearing of axle journal bearing shell.And between primary seal circle (3) and the bearing shell (4), after the incipient stage break-in, the gap is certain, can further not wear and tear, and only depend on the aging quality resistance of sealing ring material itself its working life, reaches the purpose that increases the service life greatly.

In the utility model, the strip adhesive tape of primary seal circle is made by rubber or other macromolecule chemical material, and secondary seal ring then is general sealing material, and its shape changes with the shape of end cap (1), prevents that seepage from getting final product.

Claims

1, the big shaft sealer of a kind of pebble mill is characterized in that: seal arrangement is combined, is made up of major and minor seal ring; The primary seal circle is close to the bearing shell two ends of matching with axle, and secondary seal ring is pressed on the bearing support both ends of the surface by gland, forms Seal cage between the two, is provided with return tube in the cavity bottom.

2, the big shaft seal of pebble mill according to claim 1 is characterized in that: the primary seal circle is the special-shaped rectangular thing that rubber or macromolecular material are made, and is around on the axle during use, and makes the head and the tail bonding, forms seal ring.

3, the big shaft seal of pebble mill according to claim 1 is characterized in that: secondary seal ring is general sealing material, and its shape matches with the shape of end cap (1).