CN201047443Y

CN201047443Y - Differential floating type transmit sealing device of centrifugal machine

Info

Publication number: CN201047443Y
Application number: CNU2007200791766U
Authority: CN
Inventors: 文传顺
Original assignee: ZIGONG ZHAOQIANG SEALING PRODUCT INDUSTRY Co Ltd
Current assignee: ZIGONG ZHAOQIANG SEALING PRODUCT INDUSTRY Co Ltd
Priority date: 2007-04-15
Filing date: 2007-04-15
Publication date: 2008-04-16
Anticipated expiration: 2017-04-15

Abstract

The utility model discloses a differential speed floating transmission sealing device of a centrifugal machine, comprising a shell and a rotary shaft which are provided with an oil inlet path and an oil return path, a sealing ring and a movable ring sleeved on the rotary shaft, and a stator ring arranged in the shell; the movable ring and the stator ring are mutually buckled together by a radially bent cirque trough and a bulge; two groups of internal sealing surfaces and external sealing surfaces are alternatively attached to each other in radial direction; the interiors of the movable ring and the stator ring are provided with connected oil holes; the shell is internally provided with a leakage recovery oil path; the utility model is characterized in that two end surfaces of the movable ring and the stator ring corresponding to the external sealing surface are wearable spraying layers; as a further improvement of the utility model, the internal surface of the sealing ring is provided with a plurality of cirque troughs; the roots of two end surfaces of movable rings adjacent to the rotary shaft are fillets. The utility model has the advantages of slow abrasion, long service life and low cost.

Description

The floating type transmission seal arrangement of the differential of centrifuge

Technical field

The utility model relates to a kind of floating type transmission seal arrangement of differential of centrifuge.

Background technique

Be widely used in chemical industry, medicine, the centrifuge of industries such as salt manufacturing, its effect is to remove in the product redundant moisture and pass through selector valve by centrifugal principle, the hydraulic pressure wet goods is realized the charging of product, carry out continization production, therefore, the axle of centrifuge should rotate, bear very big axial force again, and circuit high-pressure and hydraulic oil will enter oil hydraulic cylinder by seal arrangement and produce end thrust, finish feeding, and traditional mechanical seal and reciprocating type combination seal all can't satisfy its usage requirement, equipment can't proper functioning, and can cause a large amount of high-pressure and hydraulic oil leakages, causes environmental pollution and waste; Structural feature and movement characteristic according to centrifuge, people developed the floating type transmission seal arrangement of the differential that satisfies the centrifuge usage requirement afterwards, this device as shown in Figure 1, comprise housing 21, stationary ring 27, rotating shaft 22, be sleeved on seal ring 25 and rotating ring 26 in the rotating shaft 22, wherein rotating ring 26 and stationary ring 27 fasten mutually by the annular groove 28 and the projection 29 of bending, in projection 29 and the buckling surface of annular groove 28 and moving in projection 29 outsides, in the stationary ring surface of contact forms, external sealed face (locating shown in two groups of arrows among the figure), because the needs of assembling, rotating ring 26 and stationary ring 27 are modular construction, respectively by

screw

32,33 connect, in housing 21 and rotating shaft 22, be provided with oil-feed oil circuit 23 and oil return circuit 24, rotating ring 26 is provided with the oilhole 30 that links to each other with stationary ring 27, oil-feed oil circuit in housing 21 and the rotating shaft 22 23 is communicated with, the oilhole 30 of stationary ring 27 also is provided with the seepage that is communicated with external sealed face and oil return circuit 24 and reclaims oil circuit 31 through projection 29 in the housing 21; During work, because rotating ring 26 is sleeved in the rotating shaft 22, rotating shaft 22 drives rotating ring 26 by seal ring 25 by frictional force and does the unsteady rotation of differential, the hydraulic oil of high pressure is incessantly by the oil-feed oil circuit 23 in the rotating shaft 22 simultaneously, moving, oilhole 30 in the stationary ring, oil-feed oil circuit in the housing 21 enters oil hydraulic cylinder and produces end thrust, when the hydraulic oil flow warp moves, during oilhole 30 in the stationary ring, according to the hydrostatic pressure principle, moving, stationary ring 26, in between 27, the external sealed face will alternately be fitted, reach the purpose of sealing, interior, in the process that the external sealed face will alternately be fitted, inside and outside sealing surface alternately forms micro-gap, has a spot of hydraulic oil to enter seepage by the external sealed face and reclaims oil circuit 31; Because the linear velocity at external sealed face place is bigger, adopt carbon steel as dynamic and

static ring

26,27, then wearing and tearing are very fast, and working life is shorter, as adopts whole wearable hard alloy, and then cost is higher, and oilhole 30 is difficult to processing; Be sleeved in the rotating shaft 22 owing to rotating ring 26 simultaneously, when hydraulic oil injects oilhole 30, can promote rotating ring 26 22 radially wobble around the shaft, and existing rotating ring 26 and rotating shaft 22 adjacent both ends of the surface roots are wedge angle, with scratch rotating shaft 22 surfaces, shorten the working life of rotating shaft 22; And as shown in Figure 2, the internal surface of existing seal ring 25 is the cylndrical surface, and its inboard hydraulic difference is less, and the lubricant oil of storage is less, is difficult for making rotating ring to float, and wearing and tearing are very fast.

The model utility content

The purpose of this utility model is to overcome the above-mentioned deficiency of prior art, provides that a kind of wearing and tearing are slow, working life is long, the floating type transmission seal arrangement of differential of lower-cost centrifuge.

For achieving the above object, the utility model: the floating type transmission seal arrangement of the differential of centrifuge, comprise the housing and the rotating shaft that are provided with oil-feed oil circuit and oil return circuit, be sleeved on seal ring and rotating ring in the rotating shaft, and be installed in stationary ring in the housing, rotating ring and stationary ring fasten mutually by the annular groove and the projection of bent radial, form two groups of inside and outside sealing surfaces of alternately fitting diametrically, rotating ring is provided with the oilhole that links to each other with stationary ring, be communicated with the oil-feed oil circuit in housing and the rotating shaft, also be provided with seepage in the housing and reclaim oil circuit, it is characterized in that moving corresponding to external sealed face place, the stationary ring both ends of the surface are wear-resisting sprayfused coating, cladding material adopts the higher material of hardness, combine closely by thermal spraying form and basic material, can significantly reduce the wearing and tearing of external sealed face, increase the service life, and cost be lower;

As further improvement of the utility model, the internal surface of described seal ring is provided with twice or the above undulatory circular groove of twice, these circular grooves form the single compartment in similar labyrinth, making each road circular groove all produce pressure falls, thereby total pressure is divided into a series of pressure reduction increment, and small groove can store more lubricant oil, seal element often is on the liquid film moves, and by fluid pressure rotating ring is floated, thereby reduced friction and wear;

As further improvement of the utility model, the rotating ring both ends of the surface root adjacent with rotating shaft is fillet, improved rotating ring and rotating shaft contact conditions, avoided rotating shaft by scratch, further increases the service life;

In sum, the utlity model has that wearing and tearing are slow, working life is long, lower-cost advantage.

Description of drawings

Fig. 1 is the plan view of the floating type transmission seal arrangement of differential of existing centrifuge.

Fig. 2 is the partial view after seal ring amplifies among Fig. 1.

Fig. 3 is the utility model embodiment's a plan view.

Fig. 4 is the partial view after seal ring amplifies among Fig. 3.

Embodiment

Below in conjunction with accompanying drawing the utility model is further specified.

By shown in Figure 3, the floating type transmission seal arrangement of the differential of the utility model embodiment's centrifuge, comprise the housing 1 and the rotating shaft 2 that are provided with oil-feed oil circuit 3 and oil return circuit 4, be sleeved on seal ring 5 and rotating ring 6 in the rotating shaft 1, and be installed in stationary ring 7 in the housing 1, rotating ring 6 and stationary ring 7 fasten mutually by the annular groove 8 and the projection 9 of bent radial, form two groups of inside and outside sealing surfaces of alternately fitting diametrically, rotating ring 6 is provided with the oilhole 10 that links to each other with stationary ring 7, be communicated with the oil-feed oil circuit 3 in housing 1 and the rotating shaft 2, also be provided with seepage in the housing 1 and reclaim oil circuit 11, corresponding to moving of external sealed face place,

stationary ring

6,7 both ends of the surface are the wearing layer 12 that forms by the thermal spraying cemented carbide, 13, the rotating ring both ends of the surface root adjacent with rotating shaft 2 is fillet R, as shown in Figure 4, the internal surface at seal ring 5 is provided with the undulatory circular groove in four roads.

Claims

1. the floating type transmission seal arrangement of the differential of a centrifuge, comprise the housing and the rotating shaft that are provided with oil-feed oil circuit and oil return circuit, be sleeved on seal ring and the rotating ring in the rotating shaft and be installed in stationary ring in the housing, rotating ring and stationary ring fasten mutually by the annular groove projection of bent radial, form two groups of inside and outside sealing surfaces of alternately fitting diametrically, rotating ring is provided with the oilhole that links to each other with stationary ring, be communicated with the oil-feed oil circuit in housing and the rotating shaft, also be provided with seepage in the housing and reclaim oil circuit, it is characterized in that being wear-resisting sprayfused coating corresponding to the dynamic and static ring both ends of the surface at external sealed face place.

2. the floating type transmission seal arrangement of the differential of centrifuge according to claim 1 is characterized in that the internal surface of described seal ring is provided with twice or the above undulatory circular groove of twice.

3. the floating type transmission seal arrangement of the differential of centrifuge according to claim 1 and 2 is characterized in that the rotating ring both ends of the surface root adjacent with rotating shaft is fillet.