CN2440134Y

CN2440134Y - Non-contact type radial self-locking oil scraper

Info

Publication number: CN2440134Y
Application number: CN 00248645
Authority: CN
Inventors: 朱月兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-08-16
Filing date: 2000-08-16
Publication date: 2001-07-25
Anticipated expiration: 2010-08-16

Abstract

The utility model discloses a non-contact type radial self-locking oil seal. Through making use of an external ring which is fixedly connected to the internal side of an end cover of a bearing box, an outwards convex internal ring is arranged in an internal groove of an external ring; the outwards convex end of the internal ring is axially provided with springs which are respectively arranged by an internal chamber of a lock cup and is axially provided with a self-locking body composed of lock heads; the utility model can be acted on one end surface on any side of the external ring; the internal surface of the internal ring is caused to form a gap with the surface of a rotor shaft; through match of an oil film, non-contact oil seal can be formed; ring burn and abrasion generated by direct contact can be avoided, or influence on safety production caused by vibration of a machine group can be avoided.

Description

Contactless entad self-locking oil catch

The utility model relates to the between centers oil-sealing arrangement of a kind of steam turbine, generator, blower fan and feed water pump, relates to a kind of steam turbine inner grease retainer specifically.

Usually, steam turbine, generator, blower fan, feed pump shaft pass the bearing support front and back position, are provided with inside and outside oil catch ring, to prevent lubricating oil splash and to leak into outside the bearing support.And inside and outside oil catch is processed into pointed dentation by brass sheet, is installed on the bearing shell two ends, and the interior oil extraction of bearing shell is blocked by inner grease retainer, reduces the oil mass that is splashed on the outer oil catch.Because existing pointed dentation oil catch weares and teares easily, make its gap become big, cause leakage of oil, so not only pollute production environment, when meeting high-temperature pipe, also the possibility initiation fire constitutes a threat to safe operation; For floating type oil catch, when local insufficient lubrication or when the oil-break situation takes place, cause wearing and tearing easily and burn ring, cause unit vibration influence safety in production.

The purpose of this utility model is for solving the problem that above-mentioned technology exists, and a kind of between centers oil sealing is good, not leaking outside does not contact the contactless entad self-locking oil catch of rotor shaft and provide.

For achieving the above object, technical solution of the present utility model is finished like this: a kind of contactless entad self-locking oil catch, comprise with the inboard fixedly connected outer shroud of bearing housing end cap, form by ring in placing in the inner annular recess, the axial end that wherein is arranged on the interior ring male end in the inner annular recess is provided with some self-locking devices, ring is limited on the inner annular recess either side end face in making, ring cooperates between the internal surface with rotor shaft in it, and the oil film that forms by the rotor shaft starting constitutes contactless entad self-locking oil catch.

Described self-locking device is the inner chamber mounting spring by lock cup, and the top of its spring and the rim of a cup place that is positioned at the lock cup are provided with the ball-point pen type tapered end and form.

The utility model compared with prior art has characteristics: contactless entad self-locking oil catch, adopted elasticity self-locking device in the counterface setting of inner annular recess and interior ring male end, make that the gap between the ring and rotor shaft constitutes untouchable oil sealing by the oil film that rotor shaft starting back forms in it, solved the defective that ring oil catch contact rotor shaft in floating is easy to burn ring, wear and tear or cause unit vibration.Behind the gap that ring and rotor shaft form in having, its gap remains unchanged.Ring can free fall yet simultaneously, bumps the mill rotor axle journal, even under the situation of oil starvation or oil-break, interior ring inner surface can not wear and tear yet.

Below in conjunction with accompanying drawing embodiment to this novel being further described.

Fig. 1 is contactless entad self-locking oil catch topology view.

Fig. 2,3,4,5 is another embodiment of Fig. 1.

By contactless entad self-locking oil catch shown in Figure 1, it comprises by fixedly connected outer shroud 1 on the side in the bearing housing end cap 6, the longitudinal end of its outer shroud 1 is the conduit of an indent, in its outer shroud 1 groove, be provided with in the male end with matching and encircle 2, the interior ring oil catch that the internal surface of ring 2 in it is formed corresponding to rotor shaft 7.For surface gap between ring 2 internal surfaces in keeping and the rotor shaft 7 is in uniform state, and holds vertically by the male end of interior ring 2 the entad self-locking device that several encircle 2 displacements in can preventing is set.By self-locking device interior ring 2 is limited on the outer shroud 1 groove either side end face, make and encircle between 2 internal surfaces and rotor shaft 7 fitting surfaces in it, the oil film that forms by rotor shaft 7 starting backs constitutes untouchable oil sealing retaining, has avoided interior ring 2 internal surfaces directly to contact with rotor shaft 7, has reduced wearing and tearing.Described self-locking device is that a lock cup 3 is set in the male end of interior ring 2 is axial, lock cup 3 inner chambers are installed a spring 4, the rim of a cup of its lock cup 3 and spring 4 tops are provided with ball-point pen type tapered end 5 and form the single face lock bodies, utilize tapered end 5 to act on the end face of outer shroud 1 inner groovy one side and play the effect that self-locking limits.

Fig. 2 is another structural type of Fig. 1 self-locking device, and it is the lock cup 3 that has adopted two rims of a cup, and at the twin-lock body that mounting spring 4 is formed between symmetrically arranged ball-point pen type tapered end 5, two tapered ends 5 on each rim of a cup, acts on respectively on the outer shroud 1 inner groovy end faces of both sides.

Fig. 3 utilizes on the basis of Fig. 2 structure, has changed the shape of tapered end 5, and the shape of its tapered end 5 can be the cylindrical body that has boss.

The male end of ring 2 in Fig. 1,2,3 self-locking devices all are installed on utilize on tapered end 5 effect outer shrouds 1 groove, and Fig. 4 is installed in self-locking device on the outer shroud 1 inboard groove wall, and this structural type can be regulated coupling mechanism force.The structure of its lock body is to adopt a lock cup 3 that is bolt shape, and its inner chamber is that spring 4 and tapered end 5 are set equally, utilizes tapered end 5 to act on interior ring 2 one side end faces, and its ball-point pen type tapered end 5 can also change over the cylindrical body that has boss.

The embodiment of Fig. 5 changes on the basis at above-mentioned several scheme self-locking devices, and it is that axial distribution in the male end of interior ring 2 is provided with magnet 8 and the 1 inner groove wall adhesive of metal outer shroud.By the above-mentioned form that is provided with, also can magnet 8 be set on the cell wall of outer shroud 1, finish the adhesive of inner and outer rings equally.

Claims

1, contactless entad self-locking oil catch, comprise with the inboard fixedly connected outer shroud of bearing housing end cap, form by the interior ring of placing in the inner annular recess, it is characterized in that some self-locking devices being set by the axial end that is arranged on interior ring (2) male end in outer shroud (1) groove, interior ring (2) is limited on outer shroud (1) the groove either side end face, forms contactless oil sealing retaining.

2, by the described contactless entad self-locking oil catch of claim 1, it is characterized in that self-locking device is by the inner chamber of lock cup (3) spring (4) to be installed, top of its spring (4) and the rim of a cup place that is positioned at the lock cup are provided with ball-point pen type tapered end (5) and form.

3, by the described contactless entad self-locking oil catch of claim 2, it is characterized in that lock cup (3) has two rims of a cup, each rim of a cup place is provided with ball-point pen type tapered end (5) respectively, spring (4) is set between its two body forms two-sided lock body.

4,, it is characterized in that the cylindrical tapered end (5) that lock cup (3) two ends by two rims of a cup are provided with boss forms two-sided lock body by the described contactless entad self-locking oil catch of claim 3.

5,, it is characterized in that self-locking device is provided with spring (4) and annulus respectively by its inner chamber in the lock cup (3) that is bolt shape and forms the cylindrical tapered end (5) that has boss and form by the described contactless entad self-locking oil catch of claim 1.

6,, it is characterized in that self-locking device is by distributing on the groove walls of interior ring (2) male end or outer shroud (1) magnet (8) to be set by the described contactless entad self-locking oil catch of claim 1.