CN2071724U - Self-compensation sealing device for spherical static friction ring - Google Patents

Abstract

The utility model provides an axially sealing device of mechanical equipment, in which, the outer surface of a sealing static friction ring (12) is made into spherical shape. When the spoon-shaped deflection between the friction working face of a sealing dynamic friction ring (11) and the axis of a stirring shaft (1) is bigger, or the end surface of a stirring tube (7) is deformed, the sealing dynamic ring (11) and the sealing static friction ring (12) can keep tight bonding under the thrust force of a spring (8), realizing sealing function. Lubricating grease can be transfused to the sealing friction working face by a lubricating nozzle (17), so the whole sealing assembly can be loaded and unloaded by whole, which is convenient to site maintenance. The utility model which lowers the requirement of machining and assembly precision can be widely used for the mechanical equipment of water pumps, oil pumps, and stirring mushy state fluid. The utility model has the advantages of good sealing performance and long service life.

Description

Self-compensation sealing device for spherical static friction ring

The utility model relates to a kind of axial mechanical seal device of carrying liquid and stirring congee shape fluid machines.

Have now and be used to carry the pattern kind of liquid and stirring congee shape fluid machines axial sealer many.Widespread usage, have in filler chamber, to add asbestos packing or oily cotton cord, also useful contact-type mechanical seal device.Existing machinery seals ubiquitous problem, is that the seal friction part is worked under the dry friction operating mode, and it is more serious to wear and tear, and working life is generally shorter, the easy leakage of long duration, and complex structure, processing, assembly precision require high, and dismounting, maintenance are inconvenient.Now " having a talk to the technical innovation of grey pulp grinder " the civilian described contact-type mechanical seal device (Fig. 1) from 1989 second phase " building machineryization " publication is an example.This mechanical seal device: stir on the main shaft (1) seal friction steel ring (2) and seal friction wear resisting cast iron circle (3) are housed, expanding rubber parts (9) are installed in seal friction wear resisting cast iron circle (3) and mix on the tube (7), pressure spring (8) and batch turning bearing support (5) are loaded on and stir on the main shaft (1), and pressure spring (8) pushing seal friction wear resisting cast iron circle (3) is fitted with seal friction steel ring (2).This mechanical seal device has following shortcoming: be dry friction between seal friction steel ring (2) and the seal friction wear resisting cast iron circle (3), friction is big, and wearing and tearing are big; Seal friction steel ring (2) welding is loaded on stirs on the main shaft (1), when seal friction steel ring (2) damages, whole mortar mixer all need be dismantled, and, be difficult to again seal friction steel ring (2) is carried out Quenching Treatment seal friction steel ring (2) processing technique conditional request height; During installation, when the outer end of the interior ear end face of the supporting shaft holder (4) at grey pulp grinder two ends and batch turning bearing support (5) when tight, be easy to generate the gap; During dismounting, after taking off supporting shaft holder (4), during dismounting rolling bearing (6), need shoulder sled batch turning bearing support (5) with sled, because the casing of mortar mixer is thinner, this dismounting mode can make the face deformation of mixing tube (7); If pull down rolling bearing (6), then rolling bearing (6) there is certain infringement again, so all there are inconvenient part in dismounting, installation with beaing the way that stirs main shaft (1).

The purpose of this utility model, just provide a kind of simple and compact for structure, easy installation and removal, seal friction parts frictional force is little, and wearing and tearing are few, and sealability is good, long service life, the axial mechanical seal device that has wide range of applications solves the processing and assembling required precision height that prior art exists, loading and unloading, maintenance inconvenience, sealing surface is difficult for keeping fitting tightly, and easily produces the gap, causes the mating face wearing and tearing, occur leaking, influence deficiencies such as operating life and sealing effect.

Task of the present utility model is finished like this: design the quiet ring automatic compensation sealing device that rubs of a kind of novel sphere, and by shaft shoulder sealing rubber ring (10), axle key bolt (28), moving ring (11) and the static assembly parts composition of rubbing of sealing.The moving ring (11) that rubs of shaft shoulder sealing rubber ring (10) and sealing is sleeved on stirring shaft (1) and locatees with its shaft shoulder.Whole standstill seal assembly parts, by inner flange (26), inner flange bolt (27), outward flange dish (24), outward flange valve snail bolt (25), axial seal rubber ring (23), the quiet ring (12) that rubs of sealing, spring (8) and tubular closed chamber (13) are formed, and contact with the moving ring (11) that rubs of sealing.This assembly parts is sleeved on the stirring shaft (1), and place the end face of mixing drum (7), tighten the tube end face bolt (16) of mixing drum end face flange plate (14), mixing drum (7), mixing drum end face seal rubber ring (15) and tubular closed chamber (13), the quiet ring (12) that rubs of sealing is fitted tightly with the fricting working surface that seals the moving ring (11) that rubs.The spring of standstill seal assembly parts (8) is loaded on the interior ear end face spring seat of tubular closed chamber (13), sealing the quiet ring (12) that rubs packs into and contacts with spring (8) in the tubular closed chamber (13), be fastened on the quiet ring (12) that rubs of sealing with inner flange (26) and inner flange bolt (27) inboard axial seal rubber ring (23), with outward flange dish (24) and outward flange valve snail bolt (25) with axial seal rubber ring 23) the outside be fastened on the tubular closed chamber (13).Tighten axle key bolt (28).The adjustment packing ring (22) that contacts with the standstill seal assembly parts is contained in the outside of tubular closed chamber (13), bearing oil baffle disc (20) and bearing (6) are loaded on stirring shaft (1) axle journal place, tubular closed chamber (13) and bearing (6) are contained on the same bearing undersetting (21), bearing upper cover (18) and bearing (ball) cover (19) are housed on the bearing undersetting (21), and with bolton bearing undersetting (21) and bearing upper cover (18) and bearing (ball) cover (19).Chew (17) pressure injection lubricant grease with oil gun to lubricant oil, and deliver to the fricting working surface that ring (11) of rubbing are moved in sealing through tubular closed chamber oilhole (G) and the quiet ring oilhole (D) that rubs of sealing.Characteristics of the present utility model are that the quiet outer surface that rubs ring (12) of sealing is designed to circular arc spherical surface shape, and this circular arc spherical surface and tubular closed chamber (13) inner cylinder wall contact.Like this, keep on the one hand easily the moving ring (11) that rubs of sealing, it is concentric to seal quiet rub ring (12) and tubular closed chamber (13) three; And sealing the quiet ring (12) that rubs is supporting point with the inner cylinder wall of tubular closed chamber (13) again.This is with structural type, just makes the quiet ring (12) that rubs of sealing under spring (8) thrust, is fulcrum with the inner cylinder wall of tubular closed chamber (13).Function with universal joint and curve piston.So, rub ring (11) the wooden dipper degree of bias greatly the time when sealing is moving.Sealing the quiet ring (12) that rubs can be with the moving angle of adjusting at any time of the heavy curtain that the moving ring (11) that rubs of sealing presents in rotation, to keep the moving ring (11) and seal the rub fricting working surface of ring (12) of sound and fit tightly of rubbing of sealing.Because the quiet ring (12) that rubs of sealing has good aligning function.So, promptly be that the moving ring (11) that rubs of sealing is big with the shaft axis wooden dipper degree of bias error of stirring shaft (1), even the mixing drum face deformation, also can remain the leakproofness that rub ring (11) and quiet ring (12) fricting working surface that rubs of sealing are moved in sealing, stop liquid to spill effectively.Be drilled with lubricated tank filler sleeve (G) on the tubular closed chamber (13), and lubricant oil is housed chews (17), seal the quiet ring (12) that rubs and be drilled with oilhole (D) with moving ring (11) connecting end that rubs of sealing.In service, chew (17) lubricant grease of also can annotating by lubricant oil.And be sent to the fricting working surface of moving ring (11) of rubbing of sealing through tubular closed chamber oilhole (G) and the quiet ring oilhole (D) that rubs of sealing, to reduce surface friction drag, the minimizing loss.Thereby make moving ring (11) and quiet ring (12) long working life that rubs of sealing of rubbing of sealing, reliable operation.In addition, also be provided with spilled water hole (E) to monitor the runnability of its machinery in the bottom of tubular closed chamber (13).Simultaneously, bearing seat is by bearing upper cover (18), and bearing undersetting (21) and bearing (ball) cover (19) constitute, and bearing undersetting (21) is designed to hollow box-shaped, like this, promptly steadily are convenient to dismounting and maintenance again.The inner flange of aforementioned seal assembly (26), outward flange dish (24), the quiet ring (12) that rubs of sealing, spring (8), tubular closed chamber (13), axial seal rubber ring (23) wait each parts, the seal arrangement of packing into after the overall package separately, also can integral body unload, decompose again.Change the cooperation installation dimension of moving rub ring (11) and the quiet ring (12) that rubs of sealing of sealing, the utility model just can be widely used in the axial seal of machinery of water pump, oil pump and the stirring congee shape fluid of different types, and machining accuracy and assembly precision are less demanding.

According to above-mentioned design and improvement, the utility model has been realized preferably giving and has been decided purpose, has good seal performance, long service life, simple and compact for structure, make assembling easily, wearing and tearing are few, dismounting, easy to maintenance, characteristics such as using scope is extensive, solved the loading and unloading inconvenience that prior art exists effectively, easy to wear, the deficiency that sealing effect is not good and the life-span is short.

Now that description of drawings is as follows: Fig. 1 is the front section view of existing mortar arbor to mechanical seal device.Among Fig. 1: (1)-stirring shaft, (2)-seal friction steel ring, (3)-seal friction wear resisting cast iron circle, (4)-and supporting shaft holder, (5)-batch turning bearing support, (6)-bearing, (7)-and mixing drum, (8)-spring, (9)-expanding rubber parts.(seeing " building machineryization " 8 or nine year second phase).

Fig. 2 is the front section view of the present utility model that is installed on the mortar mixer.Among Fig. 2: (1)-stirring shaft, (6)-bearing, (7)-mixing drum, (8)-and spring, (10)-shaft shoulder sealing rubber ring, the moving ring that rubs of (11)-sealing, (D)-the quiet ring oilhole that rubs of sealing, (12)-the quiet ring that rubs of sealing, (G)-tubular closed chamber oilhole, (13)-tubular closed chamber, (14)-mixing drum end face flange plate, (15)-and mixing drum end face seal rubber ring, (16)-tube end face bolt, (17)-lubricant oil is chewed, (18)-bearing upper cover, (19)-and bearing (ball) cover, (20)-bearing oil baffle disc, (21)-bearing undersetting, (22)-the adjustment packing ring, (E)-and spilled water hole, (23)-axial seal rubber ring, (24)-outward flange dish, (25)-outward flange valve snail bolt, (26)-and inner flange, (27)-inner flange bolt, (28)-axle key bolt.

The utility model is described in further detail by embodiment at last, uses the utility model on the mortar mixer that Liaocheng Construction Machinery Plant produces, according to the structure manufacturing of previous designs.It seals the quiet ring (12) that rubs, and tubular closed chamber (13), bearing upper cover (18), bearing (ball) cover (19), bearing undersetting (21) all dig with HT20-40 grey cast iron car and process; The moving ring (11) that rubs of sealing with No. 45 steel Vehicle Processings after, surface hardening heat treatment is made, spring (8) forms with spring steel 65Mn coiling.Axial seal rubber ring (23) is with having certain flexible rubber skin.Each component in its mixing drum (7), is filled the clear water running in after 24 hours after pressing the structure assembling of description of drawings Fig. 2, reaches the ideal effect that does not leak any water.Through stirring the mortar experiment, sealing effect is good equally, do not leak a mortar, and the temperature of motor is normal again.Do not use the mortar mixer of the axial mechanical seal device of the utility model, one platform mortar mixer seals imprecision because of axle, the mortar that leaks out is except timely cleaning utilization, also will lose about one ton every year, make the parts depreciation of stirring shaft and filler chamber because of the leakage mortar, the bearing that has also is damaged, and influences shaft coupling, even the damage of speed change worm gear.Therefore, need soldering processing stirring shaft and change about more than 200 yuan of expense every every year of above-mentioned part.Five engineering departments of Liaocheng Prefecture building constructor have 50 mortar mixers, all install the utility model after, can save more than 10,000 yuan of maintenance expenses every year, save 50 tons in mortar, reduce idle cost simultaneously, improved working environment, prolonged the working life of working host.

Claims (3)

1, a kind of axial mechanical seal device, is made up of moving ring (11) and the standstill seal assembly parts of rubbing of shaft shoulder sealing rubber ring (10), axle key bolt (28), sealing, it is characterized in that: shaft shoulder sealing rubber ring (10) and sealing moves the ring (11) that rubs and is set in stirring shaft (1) and upward and with its shaft shoulder locatees; The standstill seal assembly parts links to each other with the moving ring (11) that rubs of sealing and is sleeved on the stirring shaft (1), and places the end face of mixing drum (7); Sealing the quiet outer surface that rubs ring (12) is circular arc spherical surface shape, and keeps in touch with tubular closed chamber (13) inner cylinder wall, and the fricting working surface that moves the ring (11) that rubs with sealing fits tightly; Be contained in the outside of tubular closed chamber (13) with the contacted adjustment packing ring of standstill seal assembly parts (22), tubular closed chamber (13) and bearing (6) are contained on the bearing undersetting (21).

2, according to the described axial mechanical seal device of claim 1, it is characterized in that being drilled with on the said tubular closed chamber (13) lubricant oil tank filler sleeve (G), and lubricant oil is housed chews (17), seal the quiet ring (12) that rubs and be drilled with oilhole (D) with moving ring (11) connecting end that rubs of sealing.

3, according to the described axial mechanical seal device of claim 1, it is characterized in that said standstill seal assembly parts is by inner flange (26), inner flange bolt (27), outward flange dish (24), outward flange valve snail bolt (25), axially close, the envelope rubber ring (23), the sealing the quiet ring (12) that rubs, spring (8) and tubular closed chamber (13) are formed, the seal arrangement of packing into after the overall package separately also can integral body unload again and decompose.