CN209796609U - Long-distance middle suspension bearing-free screw conveyor - Google Patents

Abstract

A long-distance screw conveyor without a suspension bearing in the middle comprises a screw shaft and a solid screw; the spiral shaft is a steel pipe, and reinforcing ribs are welded in the steel pipe; the outer diameter and the thread pitch of the solid spiral both adopt a gradual change type structure. The utility model provides a pair of no hanging bearing screw conveyer in middle of long distance places the board through setting up two-layer, can not use the hanging bearing and make screw conveyer normal operating simultaneously in the screw conveyer of long transport distance more than 4 meters.

Description

Long-distance middle suspension bearing-free screw conveyor

Technical Field

The utility model relates to a screw conveyer, especially a no suspension bearing screw conveyer in middle of long distance.

Background

At present, the conveying distance of the conventional spiral conveyor is generally not more than 4 meters under the condition that a suspension bearing is not used in the middle. After the length of the solid spiral exceeds the length, overlarge sagging amplitude is generated in the middle of the solid spiral, so that the lower end of the solid spiral is rubbed with the shell, and the problems of overlarge noise, shell heating, friction and abrasion and the like are generated during operation.

When a conveying distance of more than 4 meters is required, a suspension bearing assembly is usually added in the middle of the solid screw, which causes the following problems: one is reduced transport efficiency. Because the suspension bearing assembly occupies a certain cross section space, part of materials are prevented from running, and the conveying amount is reduced; the second is to increase the failure rate. The probability of failure is increased due to the abrasion of the hoisting bearing, oil loss and the like; thirdly, the suspension bearing assembly is not allowed to be used in some specific occasions due to material characteristics and working condition environments. For example, in some food and grain industries, materials are contaminated by lubricating oil or friction wear ash used for suspension bearing components. When conveying high-temperature materials, the suspension bearing assembly is not suitable to be used, because the common lubricating grease is not suitable to keep good lubricating effect in a high-temperature environment for a long time.

Disclosure of Invention

The utility model aims to solve the technical problem that a do not have suspension bearing screw conveyer in the middle of the long distance is provided, do not use suspension bearing and make screw conveyer normal operating simultaneously in the screw conveyer of long transport distance more than 4 meters.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

A long-distance screw conveyor without a suspension bearing in the middle comprises a screw shaft and a solid screw; the spiral shaft is a steel pipe, and reinforcing ribs are welded in the steel pipe; the outer diameter and the thread pitch of the solid spiral both adopt a gradual change type structure.

the entity spiral includes left side section spiral, middle section spiral and right side section spiral, and left side section spiral, right side section spiral are the constant pitch spiral of constant diameter, and the spiral external diameter of middle section spiral is less than the spiral external diameter of left side section spiral or right side section spiral, and the pitch of middle section spiral is greater than the pitch of left side section spiral or right side section spiral.

the spiral outer diameter of the middle section spiral is gradually reduced from two sides to the middle.

The pitch of the middle section spiral is gradually increased from two sides to the middle

The length of the spiral shaft is more than 4 meters.

The utility model relates to a no suspension bearing screw conveyer in middle of long distance has following technological effect:

1) The steel pipe that adopts the thickening, increases the strengthening rib of cross among the steel pipe, and the intensity and the rigidity of multiplicable spiral pipe axle effectively reduce the flagging range that causes behind the extension of spiral pipe axle, reduce the in service instability, can further lengthen the length of spiral pipe axle simultaneously.

2) And the solid spiral form that the outer diameters of the two spiral ends are large and the outer diameter of the middle spiral is gradually reduced from the two ends to the middle is adopted, so that the influences of friction on the shell and the like caused by the drooping of the middle part of the solid spiral can be further eliminated.

3) Adopt two spiral pitch less, spiral mid portion pitch from both ends to centre grow gradually, eliminate the influence to the conveying capacity after the spiral external diameter diminishes through this type.

4) When the two ends of the spiral pipe shaft are connected with the driving shaft and the tail shaft, the two ends of the long shaft are connected with the driving shaft and the tail shaft by adopting a long shaft aligning method, the coaxiality of the two ends of the long shaft and the driving shaft and the tail shaft is ensured, the problem that the coaxiality of the two ends of the pipe shaft is difficult to ensure in the processing of the overlong shaft is solved, and meanwhile, the processing cost is reduced.

Drawings

The invention will be further explained with reference to the following figures and examples:

Fig. 1 is a main sectional view of the present invention.

Fig. 2 is a schematic cross-sectional view at a in fig. 1.

In the figure: the device comprises a tail bearing assembly 1, a tail shaft 2, a sealing box 3, a middle shell 4, a feeding hole 5, a solid spiral 6, a left section spiral 6-1, a middle section spiral 6-2, a right section spiral 6-3, a spiral shaft 7, a discharging hole 8, a driving shaft 9, a head bearing assembly 10, a coupling 11 and a driving device 12.

Detailed Description

As shown in fig. 1-2, a long-distance screw conveyor without a suspension bearing in the middle comprises a middle shell 4, wherein a feed inlet 5 and a discharge outlet 8 are respectively arranged at the left end and the right end of the middle shell 4, a screw shaft 7 is arranged in the middle shell 4, and two ends of the screw shaft 7 are respectively installed on the middle shell 4 through a tail bearing assembly 1 and a head bearing assembly 10. The screw shaft 7 extends out of the middle shell 4 and is connected with a driving device 12 through a coupling 11. In addition, the two ends of the middle shell 4 are sealed by the sealing boxes 3.

The improvement points are mainly as follows: the spiral shaft 7 is made of thickened and thickened steel pipes (the thickened steel pipes are one to two times of the thickness of the steel pipes which are commonly used), and cross reinforcing ribs are welded in the steel pipes at intervals, so that the strength and rigidity of the spiral shaft can be increased, the drooping amplitude caused by lengthening of the spiral shaft is effectively reduced, the instability in operation is reduced, and meanwhile, the length of the spiral shaft can be further lengthened.

The solid spiral 6 adopts a form of gradually reducing, namely the solid spiral 6 is divided into three sections, including a left section spiral 6-1, a middle section spiral 6-2 and a right section spiral 6-3. The outer diameters of the left section of spiral 6-1 and the right section of spiral 6-3 are larger and are consistent, and the outer diameter of the middle section of spiral 6-2 is gradually reduced from two sides to the middle.

The solid spiral 6 adopts a gradually-changed pitch form, namely the solid spiral 6 is divided into three sections, including a left section spiral 6-1, a middle section spiral 6-2 and a right section spiral 6-3. The pitch sizes of the left section of spiral 6-1 and the right section of spiral 6-3 are selected to be smaller, the pitches of the left section of spiral 6-1 and the right section of spiral 6-3 are kept to be the same, and the pitch of the middle section of spiral 6-2 is gradually increased from two sides to the middle.

in addition, the positions of the two ends of the spiral shaft 7, which are connected with the driving shaft 9 and the tail shaft 2, are connected by adopting a long shaft centering method. Namely, the spiral shaft 7 is formed by welding a pipe shaft and coupling sleeves at two ends after aligning, and the coaxiality of the shaft positions at two ends of the long shaft is ensured by the method.

Claims (5)

1. The utility model provides a no suspension bearing screw conveyer in middle of long distance which characterized in that: comprises a spiral shaft (7) and a solid spiral (6); the spiral shaft (7) is a steel pipe, and a reinforcing rib (13) is welded in the steel pipe; the outer diameter and the thread pitch of the solid spiral (6) both adopt a gradual change type structure.

2. The long-reach intermediate bearingless screw conveyor of claim 1, wherein: the entity spiral (6) comprises a left section spiral (6-1), a middle section spiral (6-2) and a right section spiral (6-3), the left section spiral (6-1) and the right section spiral (6-3) are equal-diameter equal-pitch spirals, the outer diameter of the middle section spiral (6-2) is smaller than that of the left section spiral (6-1) or the right section spiral (6-3), and the pitch of the middle section spiral (6-2) is larger than that of the left section spiral (6-1) or the right section spiral (6-3).

3. The long-reach intermediate bearingless screw conveyor of claim 2, wherein: the outer diameter of the middle section spiral (6-2) is gradually reduced from two sides to the middle.

4. The long-reach intermediate bearingless screw conveyor of claim 2, wherein: the pitch of the middle section spiral (6-2) is gradually increased from two sides to the middle.

5. A long-reach intermediate bearingless screw conveyor according to claim 1, characterised in that the length of the screw shaft (7) is more than 4 meters.