CN213541281U

CN213541281U - Sealing mechanism for lower bearing device of main shaft of pulverizer

Info

Publication number: CN213541281U
Application number: CN202022494430.7U
Authority: CN
Inventors: 叶云; 周保弟; 唐义廷; 何利臣
Original assignee: Guilin Mining Machinery Co ltd
Current assignee: Guilin Mining Machinery Co ltd
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2021-06-25
Anticipated expiration: 2030-11-02

Abstract

The utility model discloses a supporting device sealing mechanism under milling machine main shaft, including rising and tightly carrying out synchronous pivoted axle sleeve and locating bearing gland's hole and the seal assembly between the axle sleeve on the main shaft, a serial communication port, seal assembly includes two the retaining member of skeleton oil blanket, meso-position and lower level of upper level, bearing gland's hole is the step hole, the tertiary step hole of two second order step holes, the lower part installation retaining member of skeleton oil blanket and dust ring is listed as including one-level step hole, the mid-mounting of the spacing double-row skeleton oil blanket in upper portion, the top of retaining member is spacing in the bottom of dust ring. The utility model discloses restricted seal assembly at the axial direction, guaranteed that seal assembly can not take place displacement and perk because of the atress, guaranteed the reliability of sealed form, still can change seal assembly and axle sleeve under the condition of not dismantling milling machine main shaft, bearing mechanism and bearing gland, easy maintenance saves time.

Description

Sealing mechanism for lower bearing device of main shaft of pulverizer

Technical Field

The utility model relates to an internal mechanism of milling machine specifically is a bearing arrangement sealing mechanism under milling machine main shaft.

Background

The traditional support structure for the main shaft of a pulverizer employs upper and lower support devices that are located on the lower portion of a central spindle frame within the pulverizer. The lower bearing device comprises an upper bearing and a lower bearing which are arranged in a lower bearing position of the central shaft frame, the upper bearing and the lower bearing are axially limited by a bearing gland at the bottom of the lower bearing position of the central shaft frame, and a sealing mechanism is arranged between the bearing gland and the main shaft of the pulverizer in order to prevent oil leakage.

Application number 201621080526's utility model discloses a supporting seal device under milling machine main shaft adopts the axle sleeve to keep apart bearing cap and milling machine main shaft, has avoided the damage of milling machine main shaft. The installation process of the sealing mechanism is that the framework oil seal is firstly installed on the main machine gland, then the main machine gland is installed on the central shaft frame, then the shaft sleeve is installed from bottom to top, and finally the shaft coupler is installed. In the process of installing the shaft sleeve, because the framework oil seal is only provided with the lower limit in the axial direction, and the upper side of the framework oil seal is not provided with the limit device, the friction force generated by the inner ring of the framework oil seal and the excircle of the shaft sleeve easily causes the upward movement or the tilting of the framework oil seal, thereby causing the sealing failure. In addition, this structure need dismantle axle sleeve and bearing gland when changing the sealing member, causes the maintenance to waste time and energy.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides a supporting device sealing mechanism under milling machine main shaft that sealed form is more reliable, easy maintenance saves time.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

bearing arrangement sealing mechanism under milling machine main shaft carries out synchronous pivoted axle sleeve and locates the sealing assembly between bearing cover's hole and axle sleeve including rising tight on the main shaft, its characterized in that, sealing assembly includes two skeleton oil blanket of upper level, mid-position dust ring and retaining member of lower level, bearing cover's hole is the step hole, and two second order step holes, the tertiary step hole of lower part installation retaining member of skeleton oil blanket and dust ring are listed to one-level step hole, mid-mounting including the spacing double-row skeleton oil blanket in upper portion, the top of retaining member is spacing in the bottom of dust ring.

According to the preferable scheme, the locking piece is a nut provided with an external thread, and the three-level step hole of the bearing gland is provided with a thread matched with the nut.

Compared with the prior art, the utility model discloses an advantage and effect are:

1. the utility model discloses limit the sealing member at the axial direction, guarantee that the sealing member can not take place displacement and perk because of the atress, guaranteed the reliability of sealed form.

2. The utility model discloses easy maintenance can change seal assembly and axle sleeve under the condition of not dismantling milling machine main shaft, bearing mechanism and bearing gland, and the work load when having significantly reduced the maintenance has avoided needing to change the milling machine main shaft and the cost and the time waste that cause in the traditional structure.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

And (3) identifying the figure number: 1. a main shaft; 2. a central pedestal; 3. a bearing gland; 4. a shaft sleeve; 5. a double-row self-aligning roller bearing; 6. a nut; 7. a dust ring; 8. framework oil seal; 9. a planar bearing pad; 10. a thrust self-aligning roller bearing; 11. a bearing pad; 12. a coupling is provided.

Detailed Description

The present invention will be further described with reference to the following examples, but the present invention is not limited to these examples.

The lower bearing device of the main shaft of the pulverizer comprises a bearing mechanism arranged on the main shaft 1 of the pulverizer in a bearing position at the lower part of the central shaft frame 2 and a bearing gland 3 arranged at the bottom of the bearing position and used for limiting the bearing mechanism, and the sealing mechanism of the lower bearing device of the main shaft of the pulverizer is arranged between the main shaft 1 and the bearing gland 3, as shown in fig. 1.

The bearing mechanism comprises an upper self-aligning thrust roller bearing 10 and a lower double-row self-aligning roller bearing 5, a plane bearing pad 9 is arranged between the upper self-aligning thrust roller bearing 10 and the lower double-row self-aligning roller bearing 5, the self-aligning thrust roller bearing 10 is limited on a positioning step at the lower end of the main shaft 1, a bearing pad 11 for increasing a contact surface is arranged between the two self-aligning thrust roller bearing 10 and the lower double-row self-aligning roller bearing, and the double.

Sealing mechanism is including rising tight and going on synchronous pivoted axle sleeve 4 and locating the sealing assembly between bearing gland 3's hole and axle sleeve 4 on main shaft 1, sealing assembly includes two upper-level double-row skeleton oil blanket 8, well dust ring 7 and lower nut 6, bearing gland 3's hole is the step hole, including the one-level step hole of the spacing double-row skeleton oil blanket 8 in upper portion, two second order step holes of skeleton oil blanket 8 and dust ring 7 are listed to mid-mounting, the tertiary step hole of lower part installation nut 6, tertiary step hole is seted up the screw thread and is cooperateed with the external screw thread of nut 6, nut 6 upper portion is spacing in the bottom of dust ring 7, as shown in fig. 1.

The utility model discloses the structure can be under the condition of not dismantling main shaft 1, bearing mechanism and bearing gland 3 change seal assembly and axle sleeve 4, takes off shaft coupling 12, can change axle sleeve 4, takes off nut 6, can change skeleton oil blanket 5 and dust ring 7. When the new sealing member is replaced, two columns of framework oil seals 5 and the dust ring 7 are sequentially pushed into the sealing position without obstacles, and then the locking member (the nut 6) is installed. When the shaft sleeve 4 is installed, the upper step and the lower locking piece (the nut 6) are limited in the axial direction, so that the sealing assembly is prevented from being displaced and tilted due to stress.

Claims

1. Sealing mechanism of bearing device under milling machine main shaft, including rising and tightly go up on main shaft (1) and carry out synchronous pivoted axle sleeve (4) and locate the hole of bearing gland (3) and the seal assembly between axle sleeve (4), its characterized in that, seal assembly includes two skeleton oil blanket (8) of upper level, well dust ring (7) and the retaining member of lower level, the hole of bearing gland (3) is the step hole, and including one-level step hole, the mid-mounting of the spacing double-row skeleton oil blanket in upper portion (8) two second order step holes of skeleton oil blanket (8) and dust ring (7), the tertiary step hole of lower part installation retaining member, the top of retaining member is spacing in the bottom of dust ring (7).

2. The lower bearing seal mechanism for a pulverizer main shaft according to claim 1, wherein: the locking piece is a nut (6) provided with an external thread, and the three-level step hole of the bearing gland (3) is provided with a thread matched with the nut (6).