CN209939699U - Screw conveyor with sealing structure - Google Patents

Abstract

The utility model discloses a screw conveyer with seal structure belongs to the screw conveyer field. It includes the casing, the inside of casing is provided with the screw axis, the one end of screw axis is provided with drive mechanism, the other end of screw axis is provided with seal structure, seal structure includes the gasket, the end cover flange, sealed packing, the bearing fixing base, sealed bearing, atmoseal end cover and sealed trachea, the sealed fixed connection of one end of end cover flange and casing, the center department of end cover flange is run through to the one end of screw axis, gasket and sealed packing all cup joint on the screw axis, and gasket and sealed packing offset with the both sides of end cover flange respectively, the bearing fixing base passes through support fixed connection in the outside of end cover flange. The utility model discloses an afterbody bearing end forms airtight space to adopt atmoseal and self-lubricating bearing, can not get into the powder at the during operation, make the life of bearing prolong greatly.

Description

Screw conveyor with sealed structure

technical field

The utility model relates to a screw conveyor with a sealing structure, belonging to the technical field of screw conveyors.

Background technique

During the working process of the pulverizer, since a part of the screw conveyor is built into the grinding cavity of the main machine, it is difficult for the bearing extending into the grinding cavity of the main machine to be lubricated, and the powdery material is very easy to be lubricated due to its own characteristics. It penetrates into the bearing housing along the screw shaft, and the traditional screw conveyor is difficult to apply to this working condition, and it will often cause downtime due to bearing damage.

SUMMARY OF THE INVENTION

The technical problem to be solved by the utility model is: to provide a screw conveyor with a sealing structure, which solves the problem that the powder material easily penetrates into the bearing seat along the screw shaft due to its own characteristics, and the bearing is easily damaged.

The technical problem to be solved by the utility model adopts the following technical solutions to realize:

A screw conveyor with a sealing structure includes a casing, the interior of the casing is provided with a screw shaft, one end of the screw shaft is provided with a transmission mechanism, and the other end of the screw shaft is provided with a sealing structure, the sealing structure It includes gasket, end cover flange, sealing packing, bearing fixing seat, sealing bearing, air sealing end cover and air sealing pipe. At the center of the end cover flange, the gasket and the sealing packing are sleeved on the screw shaft, and the gasket and the sealing packing are respectively abutted on both sides of the end cover flange, and the bearing fixing seat is fixed by the bracket Connected to the outer side of the end cover flange, the part of the screw shaft outside the housing is rotatably connected to the bearing fixing seat through a sealed bearing, the gas seal end cover is sleeved on the end of the screw shaft, and is detachable from the end cover flange connected, the airtight air pipe is communicated with the airtight end cap.

As a preferred example, a pressure ring is also slidably sleeved on the screw shaft, the pressure ring is detachably connected to the outer side of the flange of the end cover, and the pressure ring is abutted against the side wall of the sealing packing.

As a preferred example, the sealed bearing is a self-lubricating bearing.

As a preferred example, the outer side wall of the casing is also fixedly sleeved with a fixing flange for installing the casing.

The beneficial effects of the utility model are: the tail bearing end of the utility model forms a closed space, and adopts air seal and self-lubricating bearing, due to the introduction of compressed air during the air seal, a positive pressure is formed in the air seal end cover, and during operation It will not enter the powder, which greatly prolongs the service life of the bearing.

Description of drawings

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

FIG. 2 is a schematic structural diagram of part A in FIG. 1 .

In the figure: shell 1, screw shaft 2, fixed flange 3, air sealing pipe 4, end cover flange 5, gasket 6, sealing packing 7, pressure ring 8, bearing fixing seat 9, gas sealing end cover 10, Sealed bearing 11.

Detailed ways

In order to easily understand the technical means, creation features, achievement goals and effects of the present utility model, the present utility model is further described below with reference to the specific figures.

As shown in Figure 1-2, a screw conveyor with a sealed structure includes a housing 1, a screw shaft 2 is arranged inside the housing 1, a transmission mechanism is arranged at one end of the screw shaft 2, and a transmission mechanism is arranged at the other end of the screw shaft 2 Sealing structure, the sealing structure includes gasket 6, end cover flange 5, sealing packing 7, bearing fixing seat 9, sealing bearing 11, air sealing end cover 10 and sealing air pipe 4, the connection between end cover flange 5 and shell 1 is One end is sealed and fixedly connected, one end of the screw shaft 2 runs through the center of the end cover flange 5, the gasket 6 and the sealing packing 7 are sleeved on the screw shaft 2, and the gasket 6 and the sealing packing 7 are respectively connected with the end cover. The two sides of the flange 5 are in contact with each other, and the bearing fixing seat 9 is fixedly connected to the outer side of the end cover flange 5 through the bracket. The cover 10 is sleeved on the end of the screw shaft 2 , and is detachably connected with the end cover flange 5 , and the airtight pipe 4 is communicated with the airtight end cover 10 .

With the above solution, the transmission mechanism is a sprocket, the sprocket is fixedly sleeved on the head end of the screw shaft 2, the motor drives the screw shaft 2 to rotate through the sprocket, and the tail end of the screw shaft 2 is provided with a sealing structure, and a closed space is formed. It will not enter the powder, which greatly prolongs the service life of the bearing.

A pressure ring 8 is also slidably sleeved on the screw shaft 2 , the pressure ring 8 is detachably connected to the outer side of the end cover flange 5 , and the pressure ring 8 is in contact with the side wall of the sealing packing 7 .

By adopting the above solution, the sealing packing 7 can be firmly plugged on the end cover flange 5 to achieve the sealing function, and after long-term use, the sealing packing 7 can be easily replaced after failure.

The sealed bearing 11 is a self-lubricating bearing, which can be maintained without or with little maintenance when operating under extremely harsh or inconvenient working conditions, ensuring the continuity of production.

The outer side wall of the housing 1 is also fixedly sleeved with a fixing flange 3 for installing the housing 1, so as to install the conveyor on the pulverizer.

Working principle: The space between the screw shaft 2 and the end face flange 5 is sealed by the gasket 6, the sealing packing 7 and the pressure ring 8. All the hoods form a closed cavity, and a sealed air pipe 4 is used to pass into the sealed cavity. During operation, the compressed air enters the cavity through the sealed air pipe 4, so that the whole cavity forms a positive pressure, thereby preventing the powder from entering. In this cavity, it can protect the bearing and prolong the service life of the bearing.

The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited by the above-mentioned embodiments, and without departing from the spirit and scope of the present invention, the present invention will also have various changes and improvements, and these changes and improvements are within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (4)

1. Screw conveyer with seal structure, its characterized in that: the spiral shaft sealing device comprises a shell (1), a spiral shaft (2) is arranged in the shell (1), a transmission mechanism is arranged at one end of the spiral shaft (2), a sealing structure is arranged at the other end of the spiral shaft (2), the sealing structure comprises a gasket (6), an end cover flange (5), a sealing packing (7), a bearing fixing seat (9), a sealing bearing (11), an air sealing end cover (10) and a sealing air pipe (4), the end cover flange (5) is fixedly connected with one end of the shell (1) in a sealing manner, one end of the spiral shaft (2) penetrates through the center of the end cover flange (5), the gasket (6) and the sealing packing (7) are both sleeved on the spiral shaft (2), the gasket (6) and the sealing packing (7) are respectively abutted against two sides of the end cover flange (5), and the bearing fixing seat (9) is fixedly connected to the outer side of the end cover flange (5), the part of the screw shaft (2) located outside the shell (1) is rotatably connected with the bearing fixing seat (9) through a sealing bearing (11), the air sealing end cover (10) is sleeved at the end part of the screw shaft (2) and detachably connected with the end cover flange (5), and the sealing air pipe (4) is communicated with the air sealing end cover (10).

2. The screw conveyor with a sealing structure according to claim 1, wherein: the screw shaft (2) is further provided with a clamping ring (8) in a sliding and sleeved mode, the clamping ring (8) is detachably connected with the outer side of the end cover flange (5), and the clamping ring (8) is abutted to the side wall of the sealing packing (7).

3. The screw conveyor with a sealing structure according to claim 1, wherein: the sealing bearing (11) is a self-lubricating bearing.

4. The screw conveyor with a sealing structure according to claim 1, wherein: the outer side wall of the shell (1) is fixedly sleeved with a fixing flange (3) used for mounting the shell (1).

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