CN2256964Y

CN2256964Y - Single-spring rotation type mechanical sealing device

Info

Publication number: CN2256964Y
Application number: CN 96231644
Authority: CN
Inventors: 蒋桂清
Original assignee: MECHANICAL SEALING PARTS FACTORY ZHANGJIAGANG CITY
Current assignee: MECHANICAL SEALING PARTS FACTORY ZHANGJIAGANG CITY
Priority date: 1996-04-11
Filing date: 1996-04-11
Publication date: 1997-06-25
Anticipated expiration: 2006-04-11

Abstract

The utility model relates to a single-spring rotation type mechanical sealing device, which comprises a spring seat, a movable ring, a spring, a push ring, a sealing ring of the movable ring, a stationary ring, a sealing ring of the stationary ring, an anti-rotation pin and fastening screws, wherein, the spring is a compression spring, and the movable ring is an integral transmission sleeve. The spring seat, the spring, the push ring, and the sealing ring of the movable ring are sequentially arranged in a transmission sleeve of the movable ring to form an integral assembly. The transmission sleeve of the movable ring is provided with a plurality of long holes which are parallel with a shaft, and the end parts of the fastening screws for fixing the spring seat are in clearance matching and are positioned in the long holes of the transmission sleeve of the movable ring, so that the movable ring, the spring, the push ring, and the sealing ring of the movable ring are driven to rotate together. The single-spring rotation type mechanical sealing device which is mainly used for the mechanical seal has the advantages of fabrication process simplification, convenient installation and debugging, stable and reliable operation, and good floatability.

Description

Single spring rotating machanical seal device

The utility model relates to a kind of mechanical seal device, relates in particular to a kind of single spring rotating machanical seal device.

104 traditional type mechanical seal device, by spring seat, spring, throw-out collar, seal ring of moving ring, rotating ring, stationary ring, the stationary ring seal ring, stop pin and Cock screw are formed, spring is a pressure spring, utilize Cock screw that spring seat is fixed on the axle, the drive sleeve edge of spring seat dashes some inwardly protruded driving pawls, the outer rim of rotating ring has some Baltimore grooves with matching, rotating ring can move axially at Baltimore groove and driving pawl place with respect to spring seat, seal ring of moving ring is arranged between throw-out collar and the rotating ring, one end and the spring seat of spring offset, the other end and throw-out collar offset, the end face of rotating ring and stationary ring offsets, and the stationary ring seal ring is arranged between stationary ring and the gland.Under the elastic force effect of spring, elastic force affacts the gland that is installed on the parts through the transmission of throw-out collar, seal ring of moving ring, rotating ring, stationary ring, stationary ring seal ring always, thereby make seal ring of moving ring produce radial dilatation, between rotating ring and axle, form a seal point, rotating ring and stationary ring fit tightly, form the primary seal point, the stationary ring seal ring also produces radial dilatation, forms a seal point between stationary ring and gland.During work, spring seat rotates with axle, and spring seat drives rotating ring and throw-out collar, spring, seal ring of moving ring and rotates together by the transmission that cooperates of driving pawl with Baltimore groove, and stationary ring is because the stop pin of its afterbody is placed restrictions on, and stationary ring and stationary ring seal ring axle relatively are static.Its shortcoming: one, in when work, spring seat rotates with axle, and the driving pawl on the spring seat cooperates with this of Baltimore groove on the rotating seat, and under twisting force, driving pawl is easy to wear, the life-span is short; Two, the driving pawl on the spring seat must be made through special tool, and process route is long, and driving pawl has extension in the punching out process, causes the mismatch error between driving pawl and Baltimore groove easily, makes each parts produce catching phenomenon, and mechanical seal device running floatability is poor.

The purpose of this utility model provides that a kind of preparation process is easy, and mechanical seal is reliable for effect, stable mechanical seal device.

For reaching this purpose, in mechanical seal device, rotating ring and drive sleeve create one, with spring seat, spring, throw-out collar, seal ring of moving ring is installed in the drive sleeve of rotating ring successively, seal drive sleeve is matching with spring seat and the spring place offers some and the parallel elongated holes of axle, Cock screw passes elongated hole, be screwed in the screw on the spring seat, Cock screw top extension is inserted in the elongated hole, as Spielpassung, the elongated hole of rotating ring can move axially along Cock screw, under the elastic force effect of spring, spring can be successively to throw-out collar, seal ring of moving ring, rotating ring, stationary ring, the stationary ring seal ring is exerted pressure, thereby at the seal ring of moving ring place, between rotating ring and the stationary ring, stationary ring seal ring place forms three seal points respectively.During work, spring seat is along with the rotation of axle, acts on elongated hole on the rotating ring by Cock screw, drives rotating ring and spring, throw-out collar, seal ring of moving ring rotates together.

Advantage of the present utility model:

1, simplify manufacturing process, reduced cost, improved labour productivity and yield rate,

2, avoided catching phenomenon, Installation and Debugging are convenient,

3, mechanical seal device stable and reliable operation, floatability is good.

Below in conjunction with drawings and Examples the utility model is described in further detail.

Fig. 1 is a structure sectional view of the present utility model.

A kind of mechanical seal device shown in Figure 1, comprise spring seat 1, rotating ring 7, spring 4, throw-out collar 5, seal ring of moving ring 6, stationary ring 8, stationary ring seal ring 9, stop pin 10 and Cock screw 2, spring 4 is a pressure spring, spring seat 1 is fixed on the axle by Cock screw 2, one end and the spring seat 1 of spring 4 offset, the other end and throw-out collar 5 offset, rotating ring 7 is all-in-one-piece drive sleeve, spring seat 1, spring 4, throw-out collar 5, seal ring of moving ring 6 is installed in the drive sleeve of rotating ring 7 successively, the drive sleeve of rotating ring 7 is having several elongated holes 3 parallel with axle with spring seat 1 and spring 5 places of matching, Cock screw 2 is screwed in the screw of spring seat 1 by these elongated holes 3, the tip portion Spielpassung of Cock screw 2 is inserted in the elongated hole 3 of rotating ring 7, and rotating ring 7 can move axially in elongated hole 3 and Cock screw 2 cooperation places.Spring 4 promotes throw-out collar 5, through the thrust of seal ring of moving ring 6 and rotating ring 7, rotating ring 7 and stationary ring 8 is fitted tightly, and forms the primary seal point; Simultaneously, seal ring of moving ring 6 is subjected to the compression of end thrust and to radially expansion, forms a seal point at rotating ring 7 with the axle place; Stationary ring seal ring 9 is enclosed within on the stationary ring 8, is subjected to the thrust successively of rotating ring 7, stationary ring 8, forms a seal point at stationary ring 8 with the gland place.

During working state, spring seat 1 rotates with axle, by tip portion and 3 effects of the elongated hole on rotating ring 7 drive sleeve that are fixed on the Cock screw 2 on the spring seat 1, driving rotating ring 7 rotates, owing to be subjected to the elastic force effect of spring 4, spring 4, throw-out collar 5, seal ring of moving ring 6 rotate with spring seat 1 and rotating ring 7, stationary ring 8 is owing to be subjected to placing restrictions on of stop pin 10, stationary ring 8 and be enclosed within stationary ring seal ring 9 on the stationary ring 8, all do not rotate, between surface of contact rotating ring 7 and stationary ring 8, form a friction pair with axle.

Because it is a grip assembly that rotating ring 7, spring seat 1, spring 4, throw-out collar 5, seal ring of moving ring 6 and the Cock screw 2 of this mechanical seal device are assembled into, so its Installation and Debugging are convenient.

This mechanical seal device also can be used as other relevant mechanical seal usually as the mechanical seal of pump.

Claims

1, a kind of single spring rotating machanical seal device, comprise spring seat, rotating ring, spring, throw-out collar, seal ring of moving ring, stationary ring, the stationary ring seal ring, stop pin and Cock screw, spring is a pressure spring, spring seat is fixed on the axle by Cock screw, one end and spring seat offset, the other end and throw-out collar offset, it is characterized in that: rotating ring (7) is all-in-one-piece drive sleeve, spring seat (1), spring (4), throw-out collar (5), seal ring of moving ring (6) is installed in the drive sleeve of rotating ring (7) successively, the drive sleeve of rotating ring (7) is having several elongated holes (3) parallel with axle with spring seat (1) and spring (4) place of matching, Cock screw (2) is screwed in the screw of spring seat (1) by these elongated holes (3), the tip portion of Cock screw (2) be Spielpassung be inserted in rotating ring (7) elongated hole (3) in.