CN2238334Y

CN2238334Y - Liquid ring opening type sealing device

Info

Publication number: CN2238334Y
Application number: CN 95247055
Authority: CN
Inventors: 陈崇福
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-18
Filing date: 1995-12-18
Publication date: 1996-10-23
Anticipated expiration: 2005-12-18

Abstract

The utility model relates to a liquid ring break-off type sealing device, comprising liquid ring sealing and break-off type sealing, wherein, the liquid ring sealing is composed of an impeller with back blades, a pump cover, a back flow board, an auxiliary impeller with single face blades, a baffle plate, a liquid ring impeller with double face blades and a sealing box; the break-off type sealing comprises a stationary ring, a movable ring, a push ring, a centrifugal block, a pin, a spring, a spring seat, a fastening screw. Therefore, the utility model has the advantages of leakage prevention and little abrasion; pumps are enabled to run sucessfully under different conditions.

Description

A kind of pendular ring disconnecting type seal arrangement

The utility model belongs to the noncontact seal device, has the sealing of high pressure pendular ring, is applicable to the shaft sealing device of worker, agriculture centrifugal pump.

Existing rotating shaft sealing machinery or packing seal; mechanical seal is because friction; produce wearing and tearing; packing seal since when running produce wearing and tearing, leak easily when shutting down; under the situation for the entry and exit pressure imbalance that contains solid particle and suspended material, inflammable, explosive, poisonous, high-lift and pump, especially cause leakage for high and low temperature liquid is easier.

The purpose of this utility model is exactly thoroughly to address the above problem, and does not only leak when running up, and does not also leak when start, shutdown.

Content of the present utility model is, a kind of pendular ring disconnecting type seal arrangement, comprise by rotating ring, throw-out collar, centrifugal, pin, spring, spring seat, the disconnecting type sealing that fastening screw trip bolt constitutes, special, also comprise the pendular ring sealing, the pendular ring sealing is by the impeller of band back blade, pump cover, back flow plate, the sub-propeller of band single face blade, dividing plate, pendular ring impeller with two-sided blade, sealing case is formed, impeller at an end fixing belt back blade of axle, the sub-propeller of fixing belt single face blade successively on the axle then, with the pendular ring impeller of two-sided blade, back flow plate, dividing plate and sealing case are fixed on the pump cover; In above-mentioned disconnecting type sealing, also comprise stationary ring, stationary ring is in the inboard of sealing case, rotating ring is between stationary ring end face and the throw-out collar inboard, throw-out collar is below centrifugal, and centrifugal hook is hooked in the groove of throw-out collar, and centrifugal connects with spring seat with pin, spring seat is fixed on the axle sleeve by fastening screw trip bolt, spring is in the spring seat, and an end of spring withstands on the spring seat, and the other end withstands on the throw-out collar.

The disconnecting type sealing is outer dress.

Fig. 1 is a kind of plan view of pendular ring disconnecting type seal arrangement

Fig. 2 is a kind of I portion enlarged view of pendular ring disconnecting type seal arrangement

The utility model is described in further detail below in conjunction with drawings and Examples,

End at axle has impeller (1), it successively is pump cover (2) thereafter, sub-propeller (4), pendular ring impeller (6), the sub-propeller (4) of band single face blade, pendular ring impeller (6) with two-sided blade is fixed on the axle, dividing plate (5), back flow plate (3) and sealing case (7) are fixed on the pump cover (2), spring seat (14) is fixed on the axle sleeve (15) by fastening screw trip bolt (16), spring (13) is in the spring seat (14), one end of spring (13) withstands on the spring seat (14), the other end withstands on the throw-out collar (9), centrifugal (11) connect with spring seat (14) with pin (12), throw-out collar (9) is below centrifugal (11), the hook of centrifugal (11) is hooked in the groove of throw-out collar (9), stationary ring (8) is in the inboard of sealing case (7), and rotating ring (10) is between stationary ring (8) end face and throw-out collar (9) inboard.

When the pump entry into service, when reaching certain rotating speed, the back blade (18) of impeller (1) forms reduced-pressure zone with pump cover (2), sub-propeller (4) forms reduced-pressure zone with dividing plate (5), back flow plate (3), the two-sided blade supercharging simultaneously of pendular ring impeller (6), between the outer rim of pendular ring impeller (6) and sealing case (7), form high pressure pendular ring (19), stop leak of liquid, simultaneously, centrifugal (11) draw back throw-out collar (9) under action of centrifugal force, throw-out collar (9) is pushed rotating ring (10) open, and rotating ring (10) and stationary ring (8) are left, and reduces wear.

When the pump stall, spring (13) extruding throw-out collar (9), throw-out collar (9) is shifted rotating ring (10) onto stationary ring (8) end face, plays the seal action when shutting down.

A kind of pendular ring disconnecting type seal arrangement is respond well in test, do not leak fully, disconnecting type is sealed in start, shutdown in a flash, both can open, close, pendular ring seals the sealing effect of the liquid that contains solid and suspended particulate particularly outstanding, the utility model reaches under the situation of high and low temperature liquid at entry and exit pressure imbalance inflammable, explosive, poisonous, high-lift, pump, can both good operation.

Claims

1, a kind of pendular ring disconnecting type seal arrangement comprises the disconnecting type sealing that is made of rotating ring (10), throw-out collar (9), centrifugal (11), pin (12), spring (13), spring seat (14), fastening screw trip bolt (16), it is characterized in that,

A, also comprise pendular ring sealing, pendular ring seals by sub-propeller (4), the dividing plate (5) of the impeller (1) of band back blade (18), pump cover (2), back flow plate (3), band single face blade, forms with pendular ring impeller (6), the sealing case (7) of two-sided blade, impeller (1) at an end fixing belt back blade (18) of axle (17), then the axle on successively the sub-propeller of fixing belt single face blade (4), with the pendular ring impeller (6) of two-sided blade, back flow plate (3), dividing plate (5) and sealing case (7) are fixed on the pump cover (2);

B, in the sealing of above-mentioned disconnecting type, also comprise stationary ring (8), stationary ring (8) is in the inboard of sealing case (7), rotating ring (10) is between stationary ring (8) end face and throw-out collar (9) inboard, throw-out collar (9) is below centrifugal (11), the hook of centrifugal (11) is hooked in the groove of throw-out collar (9), centrifugal (11) connect with spring seat (14) with pin (12), spring seat (14) is fixed on the axle sleeve (15) by fastening screw trip bolt (16), spring (13) is in the spring seat (14), one end of spring (13) withstands on the spring seat (14), and the other end withstands on the throw-out collar (9).

2, a kind of pendular ring disconnecting type seal arrangement according to claim 1 is characterized in that, the disconnecting type sealing is outer the dress.