CN202360451U - Improved structure of centrifugal fan shaft seal - Google Patents

Abstract

The utility model discloses an improved structure of a centrifugal fan shaft seal, belonging to seal structures of shaft parts. The utility model aims to provide a seal structure of a shaft part, which has the advantages of simple structure, favorable seal effect and long service life. The improved structure of a centrifugal fan shaft seal comprises a shell, a main shaft arranged in the shell through a bearing, a bearing cover fixed on the shell, and a seal element arranged on the main shaft, wherein the internal surface of the bearing cover (3) is in a conical structure, and is bent inwards to form a J-shaped oil return trench (6) in the position adjacent to the main shaft (4); and the seal element (7) is a concave rubber oil deflector ring fixed in the bearing cover (3). The utility model thoroughly eliminates the defects of high abrasion tendency and high leakage tendency in the centrifugal fan shaft seal, and is suitable for chemical industry enterprises.

Description

Centrifugal blower axle envelope is improved structure

Technical field

The utility model relates to a kind of sealing configuration, relates in particular to a kind of centrifugal blower axle envelope and improves structure.

Background technique:At present, the axle envelope of centrifugal blower or centrifugal pump adopts seal elements such as packing seal or outside framework oil seal mostly.Because seal element is fixed on the housing, between seal element and the main shaft relative movement is arranged, so the seal element easy abrasion is leaked during the operation of equipment long-time continuous, needs often to shut down to handle; Not only labor intensity is big, and has a strong impact on the continuous ordinary production of enterprise.

Summary of the invention:In order to overcome the defective that exists in the existing technology, the utility model aims to provide the centrifugal blower axle envelope of a kind of simple in structure, good sealing effect, long service life and improves structure.

To achieve these goals, the utility model adopts following technological scheme: it comprises housing, is located at main shaft in this housing, is fixed on bearing cap on this housing, is located at the seal element on the said main shaft through bearing; The internal surface of bearing cap is conical structure, this internal surface and curves inwardly near the position of main shaft and form J font oil return ditch; Seal element is to be located at the rubber stop oil ring that is the concave shape structure in the bearing cap.

On bearing cap, be fixed with Gland.

Compare with existing technology; The utility model is owing to adopted technique scheme; Sealing is for to be fixed on the rubber stop oil ring on the main shaft through interference fit; Do not produce relative movement between this rubber stop oil ring and the main shaft, can not produce wearing and tearing, so lubricant oil can be along the clearance leakage between main shaft and the bearing cap.In addition; Owing to made the internal surface of bearing cap into conical structure; And be provided with aduncate J font oil return ditch at internal surface, not only increased the area of contact of bearing cap and main shaft, and when rubber stop oil ring during with main axis rotation; The lubricant oil that is thrown out of can flow into the oil return ditch along the internal surface of bearing cap, so lubricant oil can be along the clearance leakage between main shaft and the bearing cap yet; The defective of thoroughly having eliminated conventional construction seal element easy abrasion and having leaked.

Description of drawings:

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of tradition axle envelope.

Among the figure: housing 1 bearing 2 bearing caps 3 main shafts 4 Glands 5 oil return ditches 6 seal elements 7

Embodiment:Below in conjunction with accompanying drawing and concrete embodiment the utility model is described further:

As shown in Figure 1: main shaft 4 is located in the housing 1 through bearing 2, and bearing 2 is by bearing cap 3 sealings that are fixed on the housing 1.The internal surface of bearing cap 3 is conical structure, and curving inwardly near the position of main shaft 4 at the internal surface of this bearing cap forms the oil return ditch 6 of a J font; Have in the bearing cap 3 through interference fit to be fixed on the seal element 7 on the main shaft 4, the sealing element is the rubber stop oil ring, and this rubber stop oil ring is the concave shape structure.In order to improve sealing effect, on bearing cap 3, be fixed with Gland 5.

Fig. 2 and Fig. 1 are compared and can find out; After improving; The utility model adopts the rubber stop oil ring that together rotates with main shaft to substitute the former outside framework oil seal that is secured on the housing 1; Therefore thoroughly overcome seal element easily by the defective of main shaft 4 wearing and tearing, not only prolonged seal element 7 working life, but also often dismounting equipment clean.

Claims (2)

1. centrifugal blower axle envelope is improved structure, comprises housing, is located at main shaft in this housing, is fixed on bearing cap on this housing, is located at the seal element on the said main shaft through bearing; It is characterized in that: the internal surface of bearing cap (3) is conical structure, this internal surface and curves inwardly near the position of main shaft (4) and form J font oil return ditch (6); Seal element (7) is for being fixed on the rubber stop oil ring that is the concave shape structure in the bearing cap (3).

2. centrifugal blower axle envelope according to claim 1 is improved structure, it is characterized in that: on bearing cap (3), be fixed with Gland (5).

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