CN2508051Y

CN2508051Y - Brake slide sealing device

Info

Publication number: CN2508051Y
Application number: CN 01251476
Authority: CN
Inventors: 于德亮
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-11-15
Filing date: 2001-11-15
Publication date: 2002-08-28
Anticipated expiration: 2011-11-15

Abstract

The utility model relates to a slide sealing device of a brake. The A surface of an 'L'-shaped sealing ring is arranged on the top surface of a piston and the B surface of the 'L'-shaped sealing ring is slidably engaged with the side surface of the piston wall. The piston is provided with a screw hole which is engageably provided therein with a bolt, and a clamping plate is engageably arranged on the bolt. The C surface of the 'L'-shaped sealing ring is ensured on the top surface of the piston through the clamping plate and the bolt. An impermeable ring is arranged on the screw rod of the bolt head and the outer side wall of the impermeable ring is provided with a taper which is tightly clamped and engaged with the inclined surface D of the 'L'-shaped sealing ring. The side wall of the cylinder body is inlaid with at least two shroud bands and each shroud band is slidably engaged with the cylinder wall. The piston of the utility model can not be fastened, thereby being capable of operating freely and resetting only by dead weight. The ability of sealing and pressure bearing of the utility model is enhanced from the common regulated 15 M p a to 20 M p a. The service life of sealing material is prolonged and the aging time of polytetrafluoroethylene is more than 40 years.

Description

The break sliding sealing device

Affiliated field: the utility model relates to a kind of seal arrangement, particularly a kind of break sliding sealing device.

Background technique: hydraulic turbine generator uses break by cylinder body; parts such as piston and flashboard constitute; the double action of hydraulic jack when break is born the pneumatic brake of compressor emergency shutdown process and unit maintenance; slipper seal during piston motion; all adopt O image cushion rubber both at home and abroad; O shape rubber ring was generally 5 years; the Spielpassung of this structural requirement piston and inboard wall of cylinder block adopt tolerance be H8/f8 movingly; the radial force that piston is subjected to when unit brakes can make piston contact with inboard wall of cylinder block, and slip this moment is that the friction between the metal is easy to stuck piston can not be resetted.

Summary of the invention: the purpose of this utility model provide a kind of piston not hair fastener, can move easily, only depend on the deadweight break sliding sealing device that just can reset.The purpose of this utility model realizes by following structure: the utility model is a kind of break sliding sealing device, the A face of " L " RunddichtringO is positioned at piston-top surface, the B face of " L " RunddichtringO cooperates with the piston wall side slip, piston is threaded the hole, be equipped with bolt in the tapped hole, pressing plate is fitted on the bolt, the C face of " L " RunddichtringO is by pressing plate and being bolted on the piston-top surface, on the screw rod of bolt head piston ring is installed, the outer side wall of piston ring has tapering, twice shroud is at least being inlayed in it and the inclined-plane D compression fit of " L " RunddichtringO on cylinder side wall, the per pass shroud all is slidingly matched with casing wall.The utility model adopts the L shaped sealing configuration of polytetrafluoroethylmaterial material; improved working life 40 years; gap between piston and the inboard wall of cylinder block can increase 1mm or bigger; and the gap can be filled up by inlay the teflon shroud at piston external diameter; to bear the leading role of piston; the radial force that piston is subjected to when unit brakes is born by shroud, and the metalwork of piston no longer contacts with inboard wall of cylinder block like this, and teflon and intermetallic good lubricating property no longer make the piston hair fastener not reset.Slipper seal utilizes L shaped polytetrafluoroethylmaterial material; L shaped plane is pressed on the piston with pressing plate; L shaped cambered surface excircle part contacts with inboard wall of cylinder block, and the inner-diameter portion whose of cambered surface makes cone and the metal piston ring is complementary, and piston ring is screwed on piston; the handle of adjusting screw closes tightness; the effect that guarantees piston ring makes L shaped cambered surface part with inboard wall of cylinder block suitable pretightening force be arranged, and guarantees sealing effect, the outside piston open channels; the teflon shroud is embedded in the groove, bears the leading role of piston.The utility model adopts the break of slipper seal new technology that following effect is arranged: (1) piston is hair fastener not, can move easily, only depends on deadweight just can reset.(2) the seal and pressure bearing ability improves, and brings up to 20Mpa by the 15Mpa of General provisions.The life-span of sealing material improves, and the teflon ageing time was above 40 years.

Description of drawings:

Fig. 1 is the utility model structure sectional view

Embodiment:

The utility model as shown in Figure 1 is a kind of break sliding sealing device, the A face of " L " RunddichtringO 1 is positioned at piston 2 end faces, the B face of " L " RunddichtringO cooperates with the piston wall side slip, piston is threaded the hole, be equipped with bolt 3 in the tapped hole, pressing plate 4 is fitted on the bolt 3, the C face of " L " RunddichtringO is fixed on piston 2 end faces by pressing plate 4 and bolt 7, piston ring 5 is installed on the screw rod of bolt head, the outer side wall of piston ring 5 has tapering, twice shroud 6 is at least being inlayed in it and the inclined-plane D compression fit of " L " RunddichtringO on cylinder side wall, per pass shroud 6 all is slidingly matched with casing wall 8.

Claims

1, a kind of break sliding sealing device, it is characterized in that: the A face of " L " RunddichtringO (1) is positioned at piston (2) end face, the B face of " L " RunddichtringO cooperates with the piston wall side slip, piston is threaded the hole, be equipped with bolt (3) in the tapped hole, pressing plate (4) is fitted on the bolt (3), the C face of " L " RunddichtringO is fixed on piston (2) end face by pressing plate (4) and bolt (7), piston ring (5) is installed on the screw rod of bolt head, the outer side wall of piston ring (5) has tapering, twice shroud (6) is at least being inlayed in it and the inclined-plane D compression fit of " L " RunddichtringO on cylinder side wall, per pass shroud (6) all is slidingly matched with casing wall (8).