CN2097919U - Machinery sealed device of impurity pump - Google Patents

Abstract

The utility model relates to a machinery sealed device of impurity pump, which is characterized in that an internal sleeve and a stationary seat are arranged among the locating sleeve of a shaft, a shaft sleeve, and a pump case sealed body; the stationary seat is used for fixing a stationary ring and a cooling pipe; a driving ring fixes a moving ring; the moving ring makes contact with the floating stationary ring generating friction to correct automatically, so good sealed effect can be achieved. The utility model has the advantages that the power consumption of the pump can not be increased; the service life of the sealed device is longer.

Description

Machinery sealed device of impurity pump

The utility model relates to the seal arrangement of transh pump.

In the prior art, the mechanical seal device of general pump is because two seal faces allow the leakage of trace, the axle that is used for transh pump is when sealing up, being easy to cause media particle to leak remains in a standstill between both ends of the surface, play the abrasive material effect, quicken the wearing and tearing of attrition surface, mechanical seal was lost efficacy, cause more serious slurries to leak and take place.At present both at home and abroad the type of shaft sealing of transh pump is generally packing seal add high pressure water seal or sub-propeller sealing, and is easy for installation though cost is low, increased the consumed power of pump, causes energy consumption, and sealing life is also very short, and it is more frequent to change spare part.

This novel purpose provides the mechanical seal device of character such as a kind of high pressure of suitable transh pump, big flow, strong abrasion.

This novel purpose realizes by following measure, this mechanical seal device is installed on the periphery of the setting sleeve 17 of main shaft 20 and axle sleeve 18, fixing reducing ring inner sleeve 15 between described the two periphery and the pump case seal 19, on the periphery of interior cover 15 inner end portion the limit groove is arranged, seal ring 16 is arranged in the groove, the exterior edge face of interior cover 15 compresses the location by pressing plate 2, and cover plate 2 is connected on the pump case seal 19 by a plurality of screws 3.The inner end part of equipped stationary seat 4 in the cavity that has the reducing groove to form in the outer end of interior cover 15 in week, cavity.In the groove of stationary seat 4 inner end peripheries seal ring 14 is arranged, on the outer shroud inner end wall of stationary seat 4 positioning hole is arranged, be fixed in locating stud 13 these holes of grafting on the cover plate 2.The outer end of stationary seat 4 holds out against quiet cover 7 by packing ring 12, and pressing plate 6 compresses the outer shroud projection of stationary ring 7, and pressing plate 6 is connected on the outer shroud inner end wall of stationary seat 4 by a plurality of screws 5.The interior edge face of rotating ring 11 is compressed the exterior edge face of contact stationary ring 7 by transmission ring 8, rotating ring 11 is pegged graft fixing with transmission ring 8, in the rotating ring 11 outer end internal circle grooves seal ring 10 is arranged, transmission ring 8 is connected on the axle sleeve 18 by screw 9, corresponding to fixing cooling tube 1 on the outer shroud of rotating ring 11 and the stationary seat 4 of the position of the contact friction face of stationary ring 7.

Stationary ring inner end periphery has the groove of fixed seal ring 14 in this device, and the groove that Zhou Youyu stationary ring 7 matches in its outer end has the outer shroud that prolongs outward on the periphery that its outer end reducing protrudes, and the fixedly hole of cooling tube 1 is arranged on the outer shroud.

A plurality of axial spill arch grooves are arranged on the periphery of the rotating ring 11 in this device, corresponding a plurality of axial convex-shaped arc surface platforms are arranged on the interior week of the inner end of the transmission ring 8 of Pei Heing with it.Arch groove and platform on the surface of contact of rotating ring 11 and transmission ring 8 are also interchangeable, and locating effect is identical.

Narrate below in conjunction with drawings and Examples.

With reference to accompanying drawing is this novel embodiment, and its structure as mentioned above.Liquid in the pump housing has from the slit of setting sleeve 17 and interior cover 15 to the trend that effluxes, because of the seal action of seal ring 14 can not leak, and give 4 one outside axial pressures of stationary seat, make it to promote stationary ring 7 and compress sealing, so the surface of contact of the two can not leak yet with rotating ring 11.The seal ring 10 of rotating ring 11 outer ends is pressed on the axle sleeve 18, makes between transmission ring 9 and the axle sleeve 18 also can not leak.It is better to make it sealing, directly the do not turned round connection of part friction of Sealing.This novel principle is to utilize the pressure medium of pump to promote stationary ring 7 and rotating ring 11 applyings, stationary ring can be floated, the rotating ring that has so just overcome rotation is beated and caused by factors swing deviation such as pump shaft rotary centrifugal force because of bearing, make two seal faces automatic capturing when friction takes place, and the partially phenomenon of friction can not appear, one in slurries also can not entered between two seal faces, to reach the effect of sealing.For stationary ring can be floated, must make during installation stationary seat 4 bottom surfaces and seal chamber end face keep several millimeters between the crack, if there is not this gap to exist, then stationary ring can not float.When with rotating ring friction taking place again, will be easy to produce the phenomenon of inclined to one side friction, so the floating of stationary ring, the reliable key point of sealing just.Keep two long fretting wears of seal face, friction pair material must be gone up firmly firmly, Hardmetal materials is a desirable material comparatively at present, it is good having the surface roughness of two seal faces will reach Ra0.08-0.04 again, external diameter wants consistent in two rings, slag slurry sand fed sheet of a media temperature is more than 70 ℃ the time, moving, the stationary ring surface must be cooled off, because when medium temperature is higher than 70 ℃, liquid film is easy to metamorphosis (liquid phase change gas phase) between end face, along with its erosion rate of temperature rise will increase by index law, and the abrasion of operative end surface aggravation or hot crack occurs, in order to adapt to the high working condition of medium temperature, this mechanical seal device is provided with cooling mechanism.

Present technique is through the moving examination proof of turning to of industrialness, and it has simple in structure, and is easy for installation, and sealing is reliable, and over a long time running can reach the characteristics that dropping liquid does not leak, and cost also is lower than at present mechanical seal price both at home and abroad.

Claims (3)

1, a kind of seal arrangement that is used for transh pump, be installed on the setting sleeve 17 and axle sleeve 18 peripheries of main shaft, it is characterized in that described setting sleeve 17, fixing interior cover 15 between axle sleeve 18 and the pump case seal 19, in the groove of interior cover 15 inner end peripheries seal ring 16 is arranged, the outer end of interior cover 15 compresses the location by cover plate 2, cover plate 2 is connected on the pump seal body, week cavity is arranged in the outer end of interior cover 15, equipped stationary seat 4 in the cavity, in the groove of stationary seat 4 inner end peripheries seal ring 14 is arranged, stationary seat 4 outer ends hold out against stationary ring 7 by packing ring 12, pressing plate 6 compresses the outer shroud of stationary ring 7, on the outer shroud inner end wall of stationary seat 4 positioning hole is arranged, and the locating stud 13 that is fixed on the cover plate 2 is plugged in this hole, pressing plate 6 is connected on the stationary seat 4, the interior edge face of rotating ring 11 compresses the exterior edge face that contacts stationary ring 7 by transmission ring 8, and rotating ring 11 is pegged graft with transmission ring 8 and fixed, and in the internal circle groove of rotating ring outer end seal ring 10 is arranged, transmission ring 8 is connected on the axle sleeve 18, fixing cooling tube 1 on stationary seat 4 outer shrouds of corresponding rotating ring 11 and stationary ring 7 attrition surfaces.

2, seal arrangement according to claim 1, the inner end periphery that it is characterized in that described stationary seat 4 has the groove of fixed seal ring 14, the groove that Zhou Youyu stationary ring 7 matches in its outer end, its outer end periphery have the outer shroud that prolongs outward, and the fixedly hole of cooling tube 1 is arranged on the outer shroud.

3, seal arrangement according to claim 1 and 2 is characterized in that on the periphery of described rotating ring 11 axial spill arch groove being arranged, and corresponding axial convex-shaped arc surface platform is arranged on the interior week of the inner end of the transmission ring 8 of Pei Heing with it.

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