CN207830557U - A kind of screw conveyor floating shaft end seal assembly - Google Patents

Abstract

The utility model discloses a kind of screw conveyor floating shaft end seal assembly, including speed reducer and end cap, the outside of the output shaft of the speed reducer is equipped with flange, and end cap is lined with fluid sealant certain pretightning force by bolt, ensures the sealing effect of end cap and flange；It is flexible connection with flanged joint due to having the isolation of seal gasket, end cap, can certain displacement radially occur for end cap when having radially outward force effect；When output shaft is swung, the radial load of generation is transmitted to by sealing ring on end cap, makes end cap that its sealing elements therein be driven to be subjected to displacement together with Impact direction；Since seal assembly can be with the swing of main shaft; its position occurs respective change and carries out position compensation; ensure that the radial seal gap variation between main shaft and sealing element is little, sealing performance can greatly improve, and the utility model increases floating structure; reduce sealing element abrasion condition; sealing effect is more preferable, and the service life is longer, and failure rate is low; downtime is reduced, it is cost-effective.

Description

A kind of screw conveyor floating shaft end seal assembly

Technical field

The utility model is related to sealings, more particularly to a kind of screw conveyor floating shaft end seal assembly.

Background technology

When screw conveyor works, motor via reducer drives spiral mandrel by prescribed direction rotation, by material from low Locate to convey toward eminence.According to different operating modes, screw conveyor has long time continuous working, has interruption but frequent starting works , and powder quality is relatively hard to keep unanimously, such as temperature, humidity, the sundries such as caking, iron block, steel wire is had sometimes, so spiral transferring It is quite severe to send the operating mode of machine, with material directly contact, has the sealing of the reductor shaft of rotary motion to be particularly important, The quality of shaft end seal quality directly determines the quality of screw machine, and according to statistics, the failure of present screw machine has 60% to be all Caused by being failed by shaft end seal.

As shown in Figs. 1-3, the sealing structure of shaft end generally used on screw conveyor at present is as follows, by Teflon gasket 211, felt 210, felt pressure pad 29, outside framework oil seal 26, sealing ring 27, clamp spring 25 and end cap 21, oil pipe 28 etc. form an axis Hold seal assembly.

Shaft end seal assembly is rigid connection with speed reducer flange, axial, radial to generate movement.

When screw conveyor works, speed reducer main shaft stressing conditions are more complicated, other than bearing the torsion of motor transmission, The axial thrust that spiral mandrel generates when material up conveys and the bending force that support helix mandrel generates are still suffered from, meanwhile, Since spiral mandrel belongs to elongated shaft, usual single long length is 3~4 meters, and deflection deformation can occur for high speed rotation, be eccentrically rotated production Raw additional force is also by base bearing by easily causing spindle swing.

It such as conveys in material containing blocky hard object, extruding can be caused to cause flexural deformation to spiral mandrel, be eccentrically rotated production Raw additional force bigger, causes spindle swing bigger.

It can be seen that from Fig. 1 structures, end cap has male half coupling Φ d to coordinate with flange when assembly, is rigidly connected with bolt, prevents diameter To displacement.It when spindle swing rotates, is equivalent to and is eccentrically rotated, radial direction cannot occur since all sealing elements are limited by end cap Displacement causes seal clearance to small while greatly, accelerates sealing element abrasion, powder to be easily accessible inside, destroys sealing structure, Seal failure is caused the grey failure of leakage occur.Special circumstances are encountered, as conveyed in material containing blocky hard object, spiral mandrel is caused Flexural deformation caused by squeezing, swings bigger, and sealing structure can be quickly invalidated.Service life is short, high failure rate, shutdown loss compared with Greatly.

Utility model content

The purpose of this utility model is to propose a kind of screw conveyor floating shaft end seal assembly, to solve above-mentioned background skill The problem of being proposed in art.

One side according to the present utility model provides a kind of screw conveyor floating shaft end seal assembly, including slows down The outside of machine and end cap, the output shaft of the speed reducer is equipped with flange, and the end cap is bolted on the outside of flange, institute The contact position of the outside and end cap of stating bolt is equipped with limited post, and the outside of the limited post and the contact position of flange are equipped with fluid sealant Pad, the output shaft pass through end cap, and the side between the madial wall of the end cap and the lateral wall of output shaft close to flange is symmetrical Equipped with clamp spring, it is arranged with outside framework oil seal between the clamp spring, sealing ring, the outside framework oil seal are equipped between the outside framework oil seal Oil pipe stretch out outside flange, the side of separate flange is arranged with felt pressure in the space that the end cap is contacted with output shaft Pad, the felt pressure pad are bonded with the clamp spring far from flange side, and the side of the felt pressure pad far from clamp spring is equipped with felt, institute It states side of the felt far from felt pressure pad and is equipped with Teflon gasket.

Further, the driving end connection of the motor in the input shaft and screw conveyor of the speed reducer, the deceleration Helix core axis connection in the output shaft and screw conveyor of machine.

Further, the interior radial direction trisection of the seal gasket is equipped with through-hole, the inside of the seal gasket Wall is axially arranged with arc groove.

Further, the sealing ring is made of tin bronze material.

The technique effect of the utility model：After assembling, end cap is lined with fluid sealant certain pretightning force by bolt, protects Demonstrate,prove the sealing effect of end cap and flange；It is flexible connection with flanged joint due to having the isolation of seal gasket, end cap, has diameter outside Can certain displacement radially occur for end cap when force effect；When output shaft is swung, the radial load of generation is transmitted to by sealing ring On end cap, make end cap that its sealing elements therein be driven to be subjected to displacement together with Impact direction；Since seal assembly can be with main shaft Swing, position occurs respective change and carries out position compensation, ensures that the radial seal gap between main shaft and sealing element changes Less, sealing performance can greatly improve.The utility model increases floating structure, reduces sealing element abrasion condition, sealing effect More preferably, the service life is longer, and failure rate is low, reduces downtime, cost-effective.

Description of the drawings

Fig. 1 is the structural schematic diagram of the prior art；

Fig. 2 is partial structural diagram in the prior art；

Fig. 3 is the structural schematic diagram of end cap in the prior art；

Fig. 4 is the structural schematic diagram of the utility model；

Fig. 5 is the portions the A enlarged drawing in Fig. 1；

Fig. 6 is the structural schematic diagram of end cap in the utility model；

Fig. 7 is the structural schematic diagram of limited post in the utility model；

Fig. 8 is the structural schematic diagram of seal gasket in the utility model.

Reference sign：

1- speed reducers, 11- output shafts, 12- flanges, 21- end caps, 22- bolts, 23- limited posts, 24- seal gaskets, 25- Clamp spring, 26- outside framework oil seals, 27- sealing rings, 28- oil pipes, 29- felts pressure pad, 210- felts, 211- Teflon gaskets.

Specific implementation mode

To make the objectives, technical solutions and advantages of the present invention clearer, With reference to embodiment And with reference to attached drawing, the utility model is further described.It should be understood that these descriptions are merely illustrative, and do not really want Limit the scope of the utility model.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to avoid not Necessarily obscure the concept of the utility model.

- 8 are please referred to Fig.1, the utility model provides a kind of technical solution：A kind of screw conveyor floating shaft end seal is total At, including speed reducer 1 and end cap 21, compared with prior art end cap 21 remove positioning male half coupling, the output of the speed reducer The outside of axis 11 is equipped with flange 12, and the end cap 21 is fixed on the outside of flange 12, the outside of the bolt 22 by bolt 22 It is equipped with limited post 23 with the contact position of end cap 21,23 height dimension h of limited post will be controlled, to ensure end cap 21 and flange 12 Can certain displacement radially occur for sealing effect, while ensureing when having radially outward force effect, end cap 21, the limited post 23 it is outer The contact position of portion and flange 12 is equipped with seal gasket 24, and the output shaft 11 passes through end cap 12, the madial wall of the end cap 12 with Side between the lateral wall of output shaft 11 close to flange is arranged with clamp spring 25, and skeleton oil is arranged between the clamp spring 25 26 are sealed, sealing ring 27 is equipped between the outside framework oil seal 26, sealing ring 27 is changed to tin bronze by polytetrafluoroethylene (PTFE), ensures output shaft 11, which swing the radial load generated, can be transmitted on end cap 21, and the oil pipe 28 of the outside framework oil seal 26 stretches out outside flange 12, passes through Oil pipe 25 can be that outside framework oil seal 26 provide lubricating oil, the one of separate flange 12 in the space that the end cap 21 is contacted with output shaft 11 Side is arranged with felt pressure pad 29, and the felt pressure pad 29 is bonded with the clamp spring 25 far from 12 side of flange, the felt pressure pad 29 sides far from clamp spring 25 are equipped with felt 210, and side of the felt 210 far from felt pressure pad 29 is equipped with Teflon gasket 211。

Specifically, the driving end connection of the motor in the input shaft and screw conveyor of the speed reducer, motor are to subtract The rotation of fast machine provides power, and the helix core axis connection in the output shaft and screw conveyor of the speed reducer, speed reducer is spiral shell The rotation for revolving mandrel provides power.

Specifically, the interior radial direction trisection of the seal gasket is equipped with through-hole 241, conveniently it is bolted, institute The madial wall for stating seal gasket is axially arranged with arc groove 242, and oil pipe is facilitated to connect.

Specifically, the sealing ring is made of tin bronze material, tin bronze is changed to by polytetrafluoroethylene (PTFE), ensures output shaft Swinging the radial load generated can be transmitted on end cap.

Operation principle：After the utility model general assembly prepares, end cap is lined with fluid sealant certain pretightning force by bolt, protects Demonstrate,prove the sealing effect of end cap and flange；It is flexible connection with flanged joint due to having the isolation of seal gasket, end cap, has diameter outside Can certain displacement radially occur for end cap when force effect；When output shaft is swung, the radial load of generation is transmitted to by sealing ring On end cap, make end cap that its sealing elements therein be driven to be subjected to displacement together with Impact direction；Since seal assembly can be with main shaft Swing, position occurs respective change and carries out position compensation, ensures that the radial seal gap between main shaft and sealing element changes Less, sealing performance can greatly improve it should be understood that the above-mentioned specific implementation mode of the utility model is used only for example Property explanation or explain the principles of the present invention, without constitute limitations of the present invention.Therefore, new without departing from this practicality Any modification, equivalent substitution, improvement and etc. done in the case of the spirit and scope of type should be included in the guarantor of the utility model Within the scope of shield.In addition, the appended claims for the utility model be intended to cover to fall into attached claim scope and boundary or Whole change and modification examples in this range and the equivalent form on boundary.

Claims (4)

1. a kind of screw conveyor floating shaft end seal assembly, including speed reducer (1) and end cap (21), it is characterised in that：It is described The outside of the output shaft (11) of speed reducer (1) is equipped with flange (12), and the end cap (21) is fixed on flange by bolt (22) (12) outside, the outside of the bolt (22) are equipped with limited post (23), the limited post (23) with the contact position of end cap (21) The contact position of outside and flange (12) be equipped with seal gasket (24), the output shaft (11) passes through end cap (21), the end cap (21) side between madial wall and the lateral wall of output shaft (11) close to flange (12) is arranged with clamp spring (25), the card It is arranged with outside framework oil seal (26) between spring (25), sealing ring (27), the skeleton oil are equipped between the outside framework oil seal (26) Oil pipe (28) the stretching flange (12) for sealing (26) is external, far from flange in the space that the end cap (21) contacts with output shaft (11) (12) side is arranged with felt pressure pad (29), and the felt pressure pad (29) is pasted with the clamp spring (25) far from flange (12) side It closes, side of the felt pressure pad (29) far from clamp spring (25) is equipped with felt (210), and the felt (210) is far from felt pressure pad (29) side is equipped with Teflon gasket (211).

2. a kind of screw conveyor floating shaft end according to claim 1 seal assembly, it is characterised in that：The speed reducer (1) the driving end of the motor in input shaft and screw conveyor connects, the output shaft (11) and spiral transferring of the speed reducer (1) Send the helix core axis connection in machine.

3. a kind of screw conveyor floating shaft end according to claim 1 seal assembly, it is characterised in that：The fluid sealant The interior radial direction trisection for padding (24) is equipped with through-hole (241), and the madial wall of the seal gasket (24) is axially arranged with arc Slot (242).

4. a kind of screw conveyor floating shaft end according to claim 1 seal assembly, it is characterised in that：The sealing ring (27) it is made of tin bronze material.