CN2663697Y

CN2663697Y - Pressure reduction type bearing lubricating and sealing structure

Info

Publication number: CN2663697Y
Application number: CN 200320107083
Authority: CN
Inventors: 陈硕; 刘忠义
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-11-13
Filing date: 2003-11-13
Publication date: 2004-12-15
Anticipated expiration: 2013-11-13

Abstract

The utility model discloses a pressure reduction type bearing lubricating and sealing structure. The shell of a bearing 5 is fixed on a bearing base 4 by a press cover 6, while the bearing base 4 is fixed on a blower shell 1. The inner loop of the bearing 5 is fixed a blower shaft 2 by a separating sheath 3 and a step of the shaft. A sealing loop 9 is arranged at the matching portion of the press cover 6 and the blower shaft 2. A bolt 7 is arranged over the press cover 6. A small hole in the core of the bolt 7 is communicated with a transverse hole on the upside of the bolt. The steam in the inner cavity of the bearing can de discharged from the small hole of the bolt 7. The bolt 7 is wringed to charge for the bearing 5 through a screw hole on the press cover 6. A bolt 8 is arranged on the optimal liquid surface of oil charged to the bearing 5. The bolt 8 is detached in oil charge. The oil overflows when the liquid surface reaches the screw hole matching with the bolt 8, when oil charge is stopped, resulting in optimal charging quantity. Two sealing loops 10 and 11 are arranged in the matching portion between the bearing base 4 and the separating sheath 3. An annular slot a is arranged in the middle of two sealing loops. A slanting hole d is arranged at downside of the annular slot a to connect the outer border of the bearing base 4.

Description

Decompression type bearing lubrication and sealing configuration

The utility model relates to the lubricated and sealing of lubricated and sealing, the especially fan bearing of engineering goods middle (center) bearing.

Bearing is the moving element that supports the axial workpiece rotation, and along with the raising of axle rotating speed, the lubricated and sealing of bearing is particularly important.The structure of the blower fan axle upper bearing (metal) of the 6NF of Xiao Shouing, N series jet-air rice polisher is in the market: the shell of bearing is fixed on the bearing support with gland, and bearing support is fixed on the Fan casing.The inner ring of bearing is fixed on the blower fan axle by the step on spacer and the axle.Gland all seals with felt or rubber oil sea with axle cooperation place, bearing support and spacer cooperation place.When being assembling, on bearing, smear bearing lubricated lubricating grease.The rotating speed of blower fan is greater than 4000 rev/mins.Have following problem like this: 1, the bearing heat that produces that runs up should not shed, and bearing temperature is raise.2, grease-added inconvenience.3, spacer one end is in Fan casing, so there is air pressure bearing support and spacer cooperation place, and contains dust in this air.Time has been grown dust and can enter in the bearing under pressure.These problems all influence the working life of bearing.

The purpose of this utility model is the defective that overcomes prior art, and a kind of decompression type bearing lubrication and sealing configuration are provided, and this structural design has decompressing groove, hole and bleeder screw, is convenient to bearing is refueled.Can reduce pressure, the temperature of bearing cavity by the vent hole on the bolt, dust should not enter in the bearing, has prolonged the working life of bearing greatly.

The purpose of this utility model realizes as follows: design one bolt directly over gland, the core of bolt has aperture to communicate with horizontal aperture on its six side.The hot gas of bearing cavity can be discharged by the aperture on the bolt.Backing out this bolt can refuel to bearing by bolt hole.Designing a bolt to the best liquid level place of bearing oiling.Unload this bolt during oiling, will overflow, at this moment, just can stop to refuel, thereby reach best volume read-out when the liquid level of oil has arrived bolt hole.In bearing support and spacer cooperation place design two seals circle, design one annular groove in the middle of the two seals circle, the porose outside of leading to bearing support in the annular groove bottom.

The advantage of this decompression type bearing lubrication and sealing configuration is: the vent hole of square bolt helps the cooling of bearing on the gland.Easy to lubricate reliable to bearing, make the bearing lubrication condition good; Bearing support reduces pressure in annular groove after the first road seal ring filters in the pressure zone dirt air that has of spacer cooperation place, and the inside has seal ring again one, so dust is difficult to enter in the bearing.So just prolonged the working life of bearing greatly.

Below in conjunction with accompanying drawing the utility model is further described.

Accompanying drawing is the sectional view of bearing lubrication of the utility model decompression type and sealing configuration.Fig. 1 is decompression type bearing lubrication and sealing configuration master sectional view, and Fig. 2 is the sectional view at A-A place among Fig. 1.

With reference to accompanying drawing, the shell of bearing 5 is fixed on the bearing support 4 with gland 6, and bearing support 4 is fixed on the Fan casing 1.The inner ring of bearing 5 is fixed on the blower fan axle 2 by the step on spacer 3 and the axle.Gland 6 has a seal ring 9 with blower fan axle 2 cooperation places, the bolt 7 that has a vent hole be installed in gland 6 directly over.Bolt 7 cores have aperture to communicate with cross-drilled hole on six sides, and the hot gas that bearing 5 high speed rotating produce can be discharged by this hole, reach the purpose of cooling.The side-lower of gland 6 has level control bolt 8, and the best liquid level of inner lower edge of the tapped hole on its gland 6 and oiling simultaneously.Unload bolt 7 and bolt 8, refuel till oil overflows from the tapped hole that cooperates with bolt 8 from the tapped hole that cooperates with bolt 7, thereby reach best volume read-out.After oiling is finished, construction bolt 7, bolt 8 and sealing gasket thereof.Bearing support 4 has the identical seal ring of twice 10,11 with spacer 3 cooperation places, design one annular groove a in the middle of the two seals circle, there is inclined hole d to lead to the outside of bearing support 4 in annular groove a bottom, bearing support 4 reduces pressure in annular groove a after the first road seal ring 11 filters with the pressure zone dirt air that has of spacer 3 cooperation places, the inside also has one seal ring 10, so dust is difficult to enter in the bearing 5.The dust that precipitates in annular groove a can be discharged from the inclined hole d that communicates with annular groove.

Claims

A kind of decompression type bearing lubrication and sealing configuration: the shell of bearing (5) is fixed on the bearing support (4) with gland (6), the inner ring of bearing (5) is fixed on the blower fan axle (2) by the step on spacer (3) and the axle, it is characterized in that: gland (6) has a seal ring (9) with blower fan axle (2) cooperation place, bolt (7) be installed in gland (6) directly over, bolt (7) core has aperture to communicate with cross-drilled hole on six sides from the lower end, the side-lower of gland (6) has bolt (8), the best liquid level of inner lower edge of its tapped hole on gland (6) and oiling simultaneously, bearing support (4) has the identical seal ring of twice (10) with spacer (3) cooperation place, (11), design one annular groove (a) has inclined hole (d) to lead to the outside of bearing support (4) in annular groove (a) bottom in the middle of the two seals circle.