CN205315514U

CN205315514U - Mixer main shaft bearing combined sealing structure

Info

Publication number: CN205315514U
Application number: CN201521106260.3U
Authority: CN
Inventors: 孙泽云
Original assignee: CHANGZHOU XINWU MACHINERY Co Ltd
Current assignee: CHANGZHOU XINWU MACHINERY Co Ltd
Priority date: 2015-12-25
Filing date: 2015-12-25
Publication date: 2016-06-15
Anticipated expiration: 2025-12-25

Abstract

The utility model discloses a mixer main shaft bearing combined sealing structure installs in the bearing frame that supports the main shaft, including fixing the mount pad on the mixer wallboard, the bearing frame is fixed on the mount pad, the support end at the main shaft is installed to the bearing, the relief hole has been seted up to the mount pad bottom, lie in be fixed with on the main shaft of bearing frame before the terminal surface laminating main shaft shaft shoulder, the preceding nut of terminal surface in bearing inner race is pressed to the rear end face, preceding nut has first step and second step, be equipped with outer lane and mount pad hole interference fit between preceding nut and the bearing, inner circle and the preceding tegillum of the first step peripheral clearance complex of preceding nut, the downthehole skeleton lip seal circle that is equipped with lip and second step outer lane interference fit in the preceding tegillum. The utility model discloses a seal structure of dual combination, can effectively prevent particle and ground paste entering bearing inside, realize the perfect sealed protection to the bearing, guarantee the normal working property of bearing to it is simple and convenient to change the maintenance.

Description

Blender main shaft bearing combined seal structure

Technical field

This utility model relates to a kind of blender main shaft bearing combined seal structure.

Background technology

Current blender main shaft bearing seals conventional version mainly oil sealing sealing and labyrinth seal, oil sealing adopts matrix type lip-type packing, by the contractility of the pressure of its cutting edge and self-tightening spring, seal shaft is produced certain radial direction enclasping force, interdict leakage-gap, reach the purpose sealed; Labyrinth seal is to arrange several sealing teeth being arranged in order on main shaft, is formed and a series of dam gap and expand cavity between tooth and tooth, and sealed medium generation when passing through the gap in tortuous labyrinth is dammed effect and reached the purpose of Drain Resistance.

Blender operationally, has substantial amounts of particle and slip and enters in bearing block along main shaft axial gap, increase the damping of bearing, cause the premature failure of bearing. Although adopting matrix type lip-type packing simple in construction, it is easy to install, but owing to installation site comes along main shaft near blender casing, slip and chip, direct crush seal circle causes that gap occurs in deformation, causes seal failure; And when adopting labyrinth seal, although the impact failure to it of the chip material can well be born, but result of use that labyrinth seal is mainly in the occasion of high-voltage high-speed is better, and the blender speed of mainshaft is relatively low, pressure is little, gap between chip and slip easy the past nut and front tegillum enters bearing, causes bearing failure.

Utility model content

The technical problems to be solved in the utility model is: overcome the deficiency in prior art, it is provided that a kind of good sealing effect, can effectively prevent particle and slip from entering Bearing inner, guarantee the blender main shaft bearing combined seal structure of bearing normal working performance.

This utility model solves its technical problem and be the technical scheme is that a kind of blender main shaft bearing combined seal structure, it is installed in the bearing block of supports main shaft, including the mounting seat being fixed on blender wallboard, bearing block is fixed in mounting seat, bearing be arranged on main shaft support end and with inner hole of bearing seat tight fit, relief hole is offered bottom described mounting seat, it is positioned on the main shaft of bearing block and is fixed with the front end face laminating main shaft shaft shoulder, rear end face is pressed on the front nut of bearing inner race inner face, described front nut has first step and second step, outer ring and mounting seat endoporus interference fit it is provided with between front nut and bearing, the front tegillum that inner ring coordinates with the first step circumferential play of front nut, the framework lip-shaped sealing ring of lip and second step outer ring interference fit it is provided with in the endoporus of front tegillum.

Further, described main shaft tail end is provided with the locking nut being pressed on bearing inner race outer face; Described bearing block outer face is fixed with gland.

The beneficial effects of the utility model are: this utility model adopts the sealing structure of double combinations; can effectively prevent particle and slip from entering Bearing inner, it is achieved perfect to bearing seals protection, it is ensured that the normal working performance of bearing; the service life of raising equipment, and it is simple and convenient to change maintenance.

Accompanying drawing explanation

Below in conjunction with drawings and embodiments, this utility model is further illustrated.

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

Tegillum 9. framework lip-shaped sealing ring 10. locking nut 11. gland before nut 7-1. first step 7-2. second step 8. before 1. main shaft 2. bearing block 3. wallboard 4. mounting seat 5. bearing 6. relief holes 7. in figure

Detailed description of the invention

Presently in connection with accompanying drawing, this utility model is further described. These accompanying drawings are the schematic diagram of simplification and basic structure of the present utility model are only described in a schematic way, and therefore it only shows the composition relevant with this utility model.

A kind of blender main shaft bearing combined seal structure as shown in Figure 1, it is installed in the bearing block 2 of supports main shaft 1, including the mounting seat 4 being fixed on blender wallboard 3, a relief hole 6 is offered bottom mounting seat 4, bearing block 2 is fixed in mounting seat 4, bearing 5 is arranged on the support end that main shaft 1 puts in bearing block 2, the endoporus tight fit of bearing 5 outer ring and bearing block 2, the tail end of main shaft 1 is provided with the locking nut 10 being pressed on bearing 5 inner ring outer face, bearing block 2 outer face is fixed with gland 11, and gland 11 is pressed on the outer face of bearing 5 outer ring.

It is positioned on the main shaft 1 of bearing block 2 and is fixed with the front nut 7 following main shaft 1 rotation, described front nut 7 has first step 7-1 and the second step 7-2 that diameter from left to right reduces successively, the front end face of front nut 7 is closely attached on main shaft 1 shaft shoulder, and the rear end face of the front nut 7 at second step 7-2 place is pressed on bearing 5 inner ring inner face; Tegillum 8 before being provided with between front nut 7 and bearing 5, described front tegillum 8 has stepped hole, the outer ring of front tegillum 8 and mounting seat 4 endoporus interference fit, the macroperforation of front tegillum 8 stepped hole coordinates with the first step 7-1 circumferential play of front nut 7, fit in the pivot clearance of front tegillum 8 front end face and first step 7-1, the rear end face of front tegillum 8 is pressed in the inner face of bearing outer ring, in the aperture portion of front tegillum 8 stepped hole, close-fitting has framework lip-shaped sealing ring 9, the lip of framework lip-shaped sealing ring 9 and second step 7-2 outer ring interference fit.

During blender work, main shaft 1 rotates, front nut 7 follows main shaft 1 synchronous axial system, when chip and slip enter in bearing block 2 along main shaft 1, the chip of the overwhelming majority and slip are stopped by the large end face of front nut 7 and are flowed out by the relief hole 6 bottom mounting seat 4, in remaining fraction chip and slip, only have small part to be flowed into by the sealing tooth between front nut 7 and front tegillum 8, but stopped by framework lip-shaped sealing ring 9, and flow out from relief hole 6 along with the rotation of main shaft 1 is backed after bottom mounting seat 4. The sealing structure of this double combinations, can effectively prevent particle and slip from entering bearing 5 internal, it is achieved perfect to bearing 5 seals protection, it is ensured that the normal working performance of bearing 5, improves the service life of equipment, and it is simple and convenient to change maintenance.

Above-mentioned embodiment is only for illustrating technology of the present utility model design and feature; its object is to allow person skilled in the art will appreciate that content of the present utility model and to be carried out; protection domain of the present utility model can not be limited with this; all equivalences made according to this utility model spirit change or modify, and all should be encompassed in protection domain of the present utility model.

Claims

1. a blender main shaft bearing combined seal structure, it is installed in the bearing block (2) of supports main shaft (1), including the mounting seat (4) being fixed on blender wallboard (3), bearing block (2) is fixed in mounting seat (4), bearing (5) be arranged on main shaft (1) support end and with bearing block (2) endoporus tight fit, it is characterized in that: described mounting seat (4) bottom offers relief hole (6), it is positioned on the main shaft (1) of bearing block (2) and is fixed with front end face laminating main shaft (1) shaft shoulder, rear end face is pressed on the front nut (7) of bearing (5) inner ring inner face, described front nut (7) has first step (7-1) and second step (7-2), outer ring and mounting seat (4) endoporus interference fit it is provided with between front nut (7) and bearing (5), the front tegillum (8) that inner ring coordinates with the first step of front nut (7) (7-1) circumferential play, the framework lip-shaped sealing ring (9) of lip and second step (7-2) outer ring interference fit it is provided with in the endoporus of front tegillum (8).

2. blender main shaft bearing combined seal structure according to claim 1, is characterized in that: described main shaft (1) tail end is provided with the locking nut (10) being pressed on bearing (5) inner ring outer face.

3. blender main shaft bearing combined seal structure according to claim 1, is characterized in that: described bearing block (2) outer face is fixed with gland (11).