CN2498408Y

CN2498408Y - Floated labyrinth spiral composite sealer

Info

Publication number: CN2498408Y
Application number: CN 01250765
Authority: CN
Inventors: 左俊业
Original assignee: Individual
Current assignee: Harbin Electric Machinery Co Ltd
Priority date: 2001-09-19
Filing date: 2001-09-19
Publication date: 2002-07-03
Anticipated expiration: 2011-09-19

Abstract

The utility model relates to a floating labyrinth-spiral combined sealing device. The main body of the utility model is a sealing ring which can freely float and adjust its own center inside a sealing assembly groove; the sealing ring is provided with a spiral sealing structure and a labyrinth sealing structure; the spiral sealing structure is a structure with a plurality of spiral sealing grooves; the bottom of the labyrinth sealing groove is provided with a spill port which is communicated with a bearing oil chamber. The spiral sealing structure of the utility model can generate a certain amount pressure inside the bearing chamber in the existence of pressure difference during the rotation of the sealing target machine, which is difficult for common sealing structures, and the pressure can fully and effectively balance the pressure difference, ensuring the advantage of absolute sealing. When the spiral sealing effect is weakened due to the halt of the rotation of the machine, the labyrinth sealing structure on the sealing ring begins to seal the sealing target machine. The utility model can be used for a long time with no need to change the components, thus the utility model is an ideal maintenance-free product.

Description

Floating type labyrinth spiral composite seal device

Technical field: the utility model relates to a kind of mechanical rotary seal device, particularly a kind of floating type labyrinth spiral composite seal device.

Background technique: domestic at present, external rotating machinery, as the sliding bearing of motor, pump, water turbine, steam turbine, compressor etc. or the oil seal of rolling bearing, the general sealing means that adopt such as fixed labyrinth, broach, bent road or seal with buss more.These seal arrangements often are not that seal clearance is excessive, appearance is sewed, be exactly that seal clearance is too small or eccentric, though temporarily can seal and since Sealing be fix with uncontrollable, the operation certain hour after, not that axle is worn, be exactly that Sealing is worn, will soon cause and sew, make rotating machinery can't continue normal operation.

Summary of the invention: the purpose of this utility model provide a kind of simple in structure, sealability is good, safe and reliable to operation, and can use and need not to change the floating type labyrinth spiral composite seal device of Sealing for a long time.The purpose of this utility model realizes by following structure: the utility model is a kind of floating type labyrinth spiral composite seal device, its main body be one can be in the black box groove seal ring of free floating and aligning, have spiral seal and labyrinth seal structure on the ring body, spiral seal is the sealing that has many helical grooves, and the labyrinth sealing bottom portion of groove has a spill port that is communicated with the bearing grease chamber.Spiral seal structure of the present utility model, the screw action direction of design is with to sew direction opposite, when sealed mechanical rotation, the formed volute pump effect opposite with sewing direction, with sealed oil or other sealed thing blowbacks, thereby the positive confinement that keeps sealing part, prevented oil or other sealed things from sealing part to external leakage or spraying, especially in the insoluble bearing chamber of general sealing, have outward under the situation of certain pressure reduction, because spiral seal certain pressure that forms when sealed mechanical rotation, more can fully demonstrate its active balance pressure reduction this moment, thereby guarantee the superiority of positive confinement.Many flap seals ring of the present utility model forms an integral body by stretched spring or holddown spring.When spiral seal weakens seal action owing to stall, the sealing problem the when labyrinth seal on the seal ring has not only solved sealed mechanical stall, and also labyrinth seal also has spill port, so that final oil or other sealed things by sealing are refluxed.Sealing mechanism of the present utility model is labyrinth spiral compound seal, and its key component---floating type special-shaped seal ring adopt have higher insulation resistance and self-lubricating property, heatproof, oil resistant, wear-resisting, and have than the special composite material of high tensile, compressive strength and thermostability and make.Therefore, the seal ring axle that promptly do not wear and tear itself is not is not worn and torn by axle simultaneously yet, i.e. this kind sealing can be under the condition that keeps positive confinement, and use for a long time and do not need to change any assembly, be a kind of desirable non-maintaining product.

Description of drawings:

Fig. 1 is the utility model structural front view

Fig. 2 is that the A of Fig. 1 is to view

Fig. 3 is that the B-B of Fig. 2 is to sectional view

Embodiment:

Embodiment 1:

The utility model as shown in Figure 1 is a kind of floating type labyrinth spiral composite seal device, one can be in the black box groove seal ring 1 of free floating and aligning, as shown in Figure 2, have spiral seal 2 and labyrinth sealing 3 structures on the ring body, spiral seal is the sealing that has many helical grooves 4, and a spill port 6 that is communicated with the bearing grease chamber is arranged at labyrinth sealing groove 5 bottoms.As shown in Figure 3, labyrinth sealing groove 5 is communicated with a spill port 6.Seal ring 1 exterior edge face is installed with positioning screwn 7.Seal ring is a splitted structure, and stretched spring 8 is installed in the groove of its outer shroud.

Embodiment 2:

Seal ring 1 is an overall structure, and other structures of present embodiment are identical with embodiment 1, no longer repeat here.

Claims

1, a kind of floating type labyrinth spiral composite seal device, it is characterized in that: its main body be one can be in the black box groove seal ring (1) of free floating and aligning, have spiral seal (2) and labyrinth sealing (3) structure on the ring body, spiral seal is for having the sealing of many helical grooves (4), and a spill port that is communicated with the bearing grease chamber (6) is arranged at labyrinth sealing groove (5) bottom.

2, a kind of floating type labyrinth according to claim 1 spiral composite seal device, it is characterized in that: seal ring (1) exterior edge face is installed with positioning screwn (7).

3, a kind of floating type labyrinth according to claim 1 and 2 spiral composite seal device is characterized in that: seal ring (1) is overall structure.

4, a kind of floating type labyrinth according to claim 1 and 2 spiral composite seal device, it is characterized in that: seal ring is a splitted structure, and stretched spring (8) is installed in the groove of its outer shroud.