CN201598014U

CN201598014U - Overflow screw conveyor

Info

Publication number: CN201598014U
Application number: CN201020022520XU
Authority: CN
Inventors: 邓光平
Original assignee: NANJING YUNTAI CHEMICAL GENERAL PLANT
Current assignee: NANJING YUNTAI CHEMICAL GENERAL PLANT
Priority date: 2010-01-13
Filing date: 2010-01-13
Publication date: 2010-10-06
Anticipated expiration: 2020-01-13

Abstract

The utility model discloses an overflow screw conveyor, which comprises a screw shaft with a helical blade, wherein two ends of the screw shaft are respectively supported onto a driving end bearing support and an outlet end bearing support via a driving end bearing and an outlet end bearing, a bearing bore on the outlet end bearing support is in clearance fit with the outlet end bearing, and the width difference between the bearing bore on the outlet end bearing support and the outlet end bearing is at least longer than axial extension of the screw shaft at a high temperature. End cap leakage caused by shaft deformation can be avoided by the overflow screw conveyor, and the overflow screw conveyor is simple in structure and low in manufacturing cost which is lower than that of a water-cooled shaft by 30%, and saves water consumption.

Description

The overflow conveyor screw

Technical field

The utility model relates to a kind of overflow conveyor screw.

Background technology

Overflow conveyor screw of the prior art, its screw shaft easily because of expansion occurs bending and deformation, wear and tear, leak gas and leak ash thereby cause producing between end cap and the filler under high-temperature condition, cause loss of material and environmental pollution.At this problem, existing improvement is to adopt hollow shaft, and middle water-cooled is prevented high temperature deformation, and shell also adopts the cover water-cooled, also to increase water feeding and draining device and be used, and its complex structure and cost height, a year water consumption reaches 3000 tons.

Summary of the invention

Problem to be solved in the utility model is that the screw shaft of overflow conveyor screw does not have a free extending space when high temperature, and Yin Gaowen produces diastrophic problem easily, and a kind of high temperature resistant overflow conveyor screw that need not to use water for cooling is provided.

For solving the problems of the technologies described above, the technical scheme that the utility model adopted is: a kind of overflow conveyor screw, comprise the screw shaft that has helicallobe, the screw shaft two ends are passed through driving end bearing and exit end bearings respectively on driving end bearing brackett and exit end bearing brackett, be free-running fit between bearing hole on the exit end bearing brackett and the exit end bearing, the width of the bearing hole on the exit end bearing brackett than the width of exit end bearing at least greater than the axial elongation amount of screw shaft when the high temperature.

When high temperature causes the screw shaft dilatational strain, because between bearing hole on the exit end bearing brackett and the exit end bearing is free-running fit, and the width of the bearing hole on the exit end bearing brackett than the width of exit end bearing at least greater than the axial elongation amount of screw shaft when the high temperature, reserved enough spaces for the stretching, extension of screw shaft, thereby avoided causing producing between end cap and the filler wearing and tearing because of axle expands.The axial elongation amount of screw shaft is according to the difference of the length of axle own and difference, in general, stretching the space length of reserving to screw shaft in the overflow conveyor screw is the axial elongation amount+5mm of screw shaft, and adopting the axial elongation amount in the utility model is the screw shaft of 5mm.

As a kind of improvement of the present utility model, described overflow conveyor screw also comprises baffle plate, baffle plate is between driving end bearing brackett and exit end bearing brackett and near the two ends of screw shaft, and the interval between baffle plate and the helicallobe is at least greater than the axial elongation amount of screw shaft when the high temperature.

During the work of high temperature overflow spiral conveyer, 600 ℃-200 ℃ the solid powder that enters from conveyer inflow point moves to the exit by the helicallobe that rotates, baffle plate plays the effect of sealing solid powder, when screw shaft produces elongation strain because of high temperature, helicallobe will touch on the baffle plate, produces wearing and tearing, therefore, make between baffle plate and the helicallobe interval that keeps at least greater than the axial elongation amount of screw shaft when the high temperature, Wear produces.

The utility model has the advantages that: can not leak because of shaft distortion causes end cap, simple in structure, saving water consumes, cost is low, than the cost that adopts water cooled axle low 30%.

Description of drawings

Fig. 1 is a cutaway view of the present utility model;

Fig. 2 is the partial enlarged drawing at A place among Fig. 1;

Fig. 3 is the partial enlarged drawing at B place among Fig. 1.

The specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

Shown in Fig. 1 and 2 and 3, the screw shaft 2 of band helicallobe 3 is positioned at housing 1 middle part, and the two ends of helicallobe 3 are provided with baffle plate 6, and the interval e that maintains 5mm is arranged between baffle plate 6 and the helicallobe 3; Baffle plate 6 outsides are driving end bearing and exit end bearing and driving end bearing brackett 8 that matches with bearing and exit end bearing brackett 7, be free-running fit between bearing hole on the exit end bearing brackett 7 and the exit end bearing 9, the diameter a of the bearing hole on the exit end bearing brackett 7 is than the wide 0.1mm of bearing outside diameter b; Exit end bearing brackett 7 head bearing hole width c are than the big 10mm of outlet bearing width d.

During work, 2 rotations of motor drives screw shaft, thus helicallobe 3 is also and then rotated.When 600 ℃-200 ℃ solid powders enter in the housing 1 by inlet point 4, under the drive of the helicallobe 3 that rotates, transmit, and be blocked in baffle plate 6 places to discharging opening 5.When screw shaft 2 is elongated because of high temperature expands, helicallobe 3 also and then elongates, because the thermal expansion amount of screw shaft 2, be that elongation is 5mm, therefore, the interval e of 5mm has avoided producing between baffle plate 6 and the helicallobe 3 friction for the expansion of screw shaft 2 provides enough spaces between baffle plate 6 and the helicallobe 3; In like manner, the bearing hole width c on the exit end bearing brackett 7 has avoided because of expansion deformation than the big 10mm of bearing width d, causes producing between end cap and the filler wearing and tearing.

Claims

1. overflow conveyor screw, comprise the screw shaft that has helicallobe, the screw shaft two ends are passed through driving end bearing and exit end bearings respectively on driving end bearing brackett and exit end bearing brackett, it is characterized in that: between bearing hole on the exit end bearing brackett and the exit end bearing for free-running fit, the width of the bearing hole on the exit end bearing brackett than the width of exit end bearing at least greater than the axial elongation amount of screw shaft when the high temperature.

2. overflow conveyor screw according to claim 1, it is characterized in that: also comprise baffle plate, baffle plate is between driving end bearing brackett and exit end bearing brackett and near the two ends of screw shaft, and the interval between baffle plate and the helicallobe is at least greater than the axial elongation amount of screw shaft when the high temperature.