CN217576915U - Radial supporting device for intermediate shaft of vertical screw conveyor - Google Patents

Abstract

The utility model discloses a radial supporting device for a middle shaft of a vertical screw conveyor, which comprises an upper middle cylinder body, a lower middle cylinder body, an upper spiral body and a lower spiral body, wherein round through holes are uniformly distributed at the lower end of the upper middle cylinder body along the radial direction, supporting components are arranged in the round through holes, and the supporting components are horizontally fixed on a lower end flange of the upper middle cylinder body; the supporting assembly comprises a supporting sleeve, a nylon rod, a disc spring and a set screw are sequentially arranged in a cylindrical hole and a threaded hole of the supporting sleeve, the disc spring is in contact with one end of the nylon rod, and the other end of the nylon rod and the intermediate shaft form radial support. The utility model replaces the traditional suspension bearing device, does not need to add lubricant, and thoroughly solves the problem of material pollution; the nylon rod is utilized to form radial support for the intermediate shaft, so that the intermediate shaft is not easy to wear and has long service life; the set screw can be regularly adjusted externally, so that the nylon rod and the intermediate shaft are always in a good contact state, and the nylon rod can be easily replaced externally.

Description

Radial supporting device for intermediate shaft of vertical screw conveyor

Technical Field

The utility model belongs to the technical field of conveyor, especially, relate to a vertical screw conveyer jackshaft radial support device.

Background

The screw conveyer is divided into a horizontal screw conveyer and a vertical screw conveyer. The rotating speed of the spiral body of the vertical screw conveyor is higher than that of the horizontal screw conveyor, and the added materials generate friction force with the cylinder under the action of centrifugal force, so that the friction force prevents the materials from rotating along with the helical blades and overcomes the gravity of the falling materials, and the vertical conveying of the materials is realized. The vertical screw conveyer is suitable for conveying fine and granular materials with good fluidity, such as grains, oil bran, feed, chemical raw materials and the like, and the height of the materials is generally not more than 10 meters. The vertical screw conveyer consists of a driving device, a screw body, a top cylinder, a middle cylinder, a bottom cylinder, a feeding hole, a discharging hole and the like. Usually the drive is placed on top and for easy transport and installation the helix is divided into sections and connected by intermediate shafts. In the processing and assembling process of the spiral body, coaxiality errors inevitably exist, the spiral body can generate deflection due to stress in the moving process of conveying materials, and when the lifting height is larger than 5 meters, in order to ensure the working stability of the spiral body, suspension bearings are arranged at intervals of 2.5 meters. The prior art suspension bearing generally adopts a rolling bearing or a sliding bearing, and is matched with an intermediate shaft. Because the suspension bearing is placed in the cylinder, dust easily enters the inside of the bearing, and the bearing is quickly out of service after the dust enters the bearing, so that the sealing and the lubrication of the bearing become main problems to be solved. In order to solve the sealing problem, for example, in chinese patent application No. CN2008200066140, "a vertical screw conveyor suspended bearing device", it is proposed that sealing end covers are installed at both ends of a bearing block, a felt ring and a labyrinth are installed in the sealing end covers, a labyrinth ring is installed at the outer end of the sealing end cover, and two rows of matching tooth sockets are formed between the sealing end covers to form a labyrinth seal. Although the sealing effect of the structure is good, the axial size is large, and the helical blade is disconnected at the position of the suspension bearing, so that the driving force for conveying the materials is lost, and the intermittent material retention is formed. In addition, the structure is complex, and the installation and the maintenance are inconvenient. The design of the intermediate shaft radial supporting device has the advantages of simple and reliable structure, simple and convenient replacement, even almost no maintenance, long service life and capability of overcoming the problem that a lubricant overflows to pollute materials, and is a development direction for solving the fault problem of the conventional suspension bearing.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the not enough of existence among the prior art, the utility model provides a can replace vertical screw conveyer jackshaft radial support device of hanging bearing, cancel antifriction bearing or slide bearing and sealed and lubricating arrangement, do not have the excessive transported substance material that pollutes of emollient, and simple structure, long service life.

The technical scheme is as follows: in order to achieve the purpose, the radial supporting device for the intermediate shaft of the vertical screw conveyor comprises an upper middle cylinder, a lower middle cylinder, an upper screw body and a lower screw body, wherein flanges at two ends of the upper middle cylinder and the lower middle cylinder are butted and connected into a whole through threads; the upper spiral body and the lower spiral body are arranged at two ends of the middle shaft and are connected into a whole by a connecting bolt, an arc-shaped gasket, a spring washer and a nut; the upper spiral body and the lower spiral body are coaxially arranged in the upper middle cylinder body and the lower middle cylinder body, round through holes are uniformly distributed at the lower end of the upper middle cylinder body along the radial direction, a supporting assembly is arranged in the round through holes, and the supporting assembly is horizontally fixed on a flange at the lower end of the upper middle cylinder body; the supporting assembly comprises a supporting sleeve, the supporting sleeve is cylindrical, a cylindrical hole and a threaded hole are sequentially formed in the supporting sleeve along the axial direction, a nylon rod, a disc spring and a set screw are sequentially arranged in the cylindrical hole and the threaded hole, the set screw is in a stepped shaft shape, an external thread is arranged at the large end, an optical axis is arranged at the small end, the external thread is in threaded fit with the threaded hole of the supporting sleeve, and the optical axis is partially inserted into the inner hole of the disc spring; one outer end face of the disc spring is in contact with a fastening screw shaft shoulder, the other outer end face of the disc spring is in contact with one end of the nylon rod, and the other end of the nylon rod and the middle shaft form radial support.

Further, the number of the supporting assemblies is four.

Furthermore, a connecting plate is welded on the outer cylindrical surface of the supporting sleeve, and round through holes for being connected with the upper middle cylinder body through bolts are formed in two sides of the connecting plate.

Furthermore, a rubber sealing ring is sleeved between the supporting sleeve and the round through hole of the upper middle cylinder.

Furthermore, rectangular grooves or dovetail grooves are uniformly distributed on the outer cylindrical surface of the middle part of the intermediate shaft along the axial direction.

Has the beneficial effects that: compared with the prior art, the beneficial effects of the utility model are as follows: (1) The utility model replaces the traditional suspension bearing device, namely, a rolling bearing or a sliding bearing is cancelled, and no lubricant is added, thus thoroughly solving the problem of material pollution; (2) Because no sealing device is arranged, the axial spacing distance between the upper spiral body and the lower spiral body is short, and the two sections of spiral blades are almost in a continuous state, so that the material retention formed by the discontinuous spiral is reduced, and the conveying efficiency is improved; (3) The nylon rods uniformly distributed in the circumferential direction are used for radially supporting the intermediate shaft, the intermediate shaft is hard to wear due to soft grinding, the service life is long, if the intermediate shaft subjected to strengthening treatment is worn very little and does not need to be replaced for a long time, and the maintenance workload is greatly reduced; the nylon material has the characteristics of high strength, good toughness, strong wear resistance, good dimensional stability and the like, and is widely applied to industry; (4) Can be according to the wearing and tearing situation of nylon stick, regularly adjust holding screw externally, make nylon stick and jackshaft be in good contact state all the time, wear to a certain extent, also change externally very easily.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 isbase:Sub>A cross-sectional view A-A of FIG. 1;

FIG. 3 is a schematic view of a center shaft with a rectangular slot;

FIG. 4 is a schematic view of an intermediate shaft with a dovetail groove;

fig. 5 is a schematic view of a set screw.

In the figure: 1. the device comprises an upper middle cylinder, 2. An upper spiral body, 3. An arc gasket, 4. A spring washer, 5. A nut, 6. A coupling bolt, 7. A supporting component, 8. A rubber sealing ring, 9. An intermediate shaft, 10. A lower spiral body, 11. A lower middle cylinder, 12. A bolt, 71. A supporting sleeve, 72. A set screw, 73. A belleville spring, 74. A connecting plate and 75. A nylon rod.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in the attached drawings 1 to 2, the radial supporting device for the intermediate shaft of the vertical screw conveyor comprises an upper intermediate cylinder body 1, a lower intermediate cylinder body 11, an upper screw body 2 and a lower screw body 10, wherein flanges at two ends of the upper intermediate cylinder body 1 and the lower intermediate cylinder body 11 are butted and connected into a whole through threads; the upper spiral body 2 and the lower spiral body 10 are arranged at two ends of the intermediate shaft 9 and are connected into a whole by a connecting bolt 6, an arc-shaped gasket 3, a spring washer 4 and a nut 5; the upper spiral body 2 and the lower spiral body 10 are coaxially arranged in the upper middle cylinder body 1 and the lower middle cylinder body 11, round through holes are uniformly distributed at the lower end of the upper middle cylinder body 1 along the radial direction, a supporting component 7 is arranged in the round through holes, and the supporting component 7 is horizontally fixed on a flange at the lower end of the upper middle cylinder body 1; the supporting assembly 7 comprises a supporting sleeve 71, the supporting sleeve 71 is cylindrical, a cylindrical hole and a threaded hole are sequentially formed in the supporting sleeve 71 along the axial direction, a nylon rod 75, a disc spring 73 and a set screw 72 are sequentially arranged in the cylindrical hole and the threaded hole, the set screw 72 is in a stepped shaft shape, an external thread is arranged at the large end of the set screw, an optical axis is arranged at the small end of the set screw, the external thread is in threaded fit with the threaded hole of the supporting sleeve 71, and the optical axis is partially inserted into the inner hole of the disc spring 73; one outer end face of the belleville spring 73 is in contact with a shoulder of the set screw 72, the other outer end face of the belleville spring is in contact with one end of the nylon rod 75, and the other end of the nylon rod 75 and the intermediate shaft 9 form a radial support.

In order to balance the radial forces in all directions, the number of support assemblies 7 is four.

In order to facilitate the disassembly and assembly of the support assembly 7, a connecting plate 74 is welded on the outer cylindrical surface of the support sleeve 71, and round through holes for connecting with the upper middle cylinder body through bolts are arranged on two sides of the connecting plate 74. The support assembly 7 is secured to the lower flange of the upper intermediate cylinder 1 by two bolts 12.

In order to prevent the material in the cylinder body from leaking, a rubber sealing ring 8 is sleeved between the supporting sleeve 71 and the round through hole of the upper middle cylinder body 1.

Two ends of the middle shaft 9 are respectively connected with the upper spiral body 2 and the lower spiral body 10, rectangular grooves or dovetail grooves are uniformly distributed on the outer cylindrical surface of the middle part of the middle shaft 9 along the axial direction and are in contact with the end part of the nylon rod 75, and extruded materials slide down along the rectangular grooves or the dovetail grooves to be prevented from being bonded on the shaft. The middle shaft provided with the rectangular groove is shown in the attached figure 3; the intermediate shaft provided with the dovetail groove is shown in fig. 4.

The belleville springs are configured in an even number, typically 4-8, which may be determined by calculation. The disk spring is a special spring which is conical in the axial direction and bears load, and certain potential energy is stored after the disk spring bears load deformation. The disk spring has high rigidity and strong buffering and vibration absorbing capacity, can bear large load with small deformation, and is suitable for occasions with small requirement on axial space. When superimposed, the greater the number of springs, the greater the load relative to the same deformation. Easy maintenance and replacement and long service life.

The diameter of the nylon rod 75 is 1/3-1/2 of that of the intermediate shaft 9.

The set screw 72 is configured as shown in fig. 5. The set screw 72 can be screwed by a crosshead screwdriver according to the wear condition of the nylon rod 75, the set screw 72 axially presses the disc spring 73, and the nylon rod 75 is in good contact with the intermediate shaft 9 by virtue of the elasticity of the disc spring 73. When the nylon rod 75 is worn out and can not be used, the set screw 72 is screwed off, the disc spring 73 is taken out, a new nylon rod 75 is replaced, then the disc spring 73 is sleeved in sequence, and the set screw 72 is screwed in. The wearing parts only have nylon rods 75, so that the maintenance cost is low and the operation is simple.

The utility model discloses a dry friction that steel and nylon formed, the event need not use lubricating oil, and fundamentally has also avoidd the possibility that lubricating grease pollutes the material.

The nylon rod is an important engineering plastic and can replace copper alloy to be used as a wear-resistant part of equipment. Has the characteristics of good toughness, strong wear resistance, high bending strength, small water absorption, good dimensional stability, low price and the like, thereby being used for processing various wear-resistant high-strength parts. At present, nylon rods in various specifications are selected by users in the market, and batch production is formed.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims (5)

1. A radial supporting device for an intermediate shaft of a vertical screw conveyor comprises an upper middle cylinder (1), a lower middle cylinder (11), an upper screw body (2) and a lower screw body (10), wherein flanges at two ends of the upper middle cylinder (1) and the lower middle cylinder (11) are butted and connected into a whole by threads; the upper spiral body (2) and the lower spiral body (10) are arranged at two ends of the middle shaft (9) and are connected into a whole by a connecting bolt (6), an arc-shaped gasket (3), a spring washer (4) and a nut (5); go up spirochaeta (2) and lower spirochaeta (10) coaxial setting up in go up middle barrel (1) with in middle barrel (11) down, its characterized in that: round through holes are uniformly distributed at the lower end of the upper middle cylinder (1) along the radial direction, a supporting component (7) is arranged in the round through holes, and the supporting component (7) is horizontally fixed on a lower end flange of the upper middle cylinder (1); the supporting assembly (7) comprises a supporting sleeve (71), the supporting sleeve (71) is cylindrical, a cylindrical hole and a threaded hole are sequentially formed in the supporting sleeve (71) along the axial direction, a nylon rod (75), a disc spring (73) and a set screw (72) are sequentially arranged in the cylindrical hole and the threaded hole, the set screw (72) is in a stepped shaft shape, an external thread is arranged at the large end, an optical axis is arranged at the small end, the external thread is in threaded fit with the threaded hole of the supporting sleeve (71), and the optical axis is partially inserted into the inner hole of the disc spring (73); one outer end face of the disc spring (73) is in contact with a shaft shoulder of a set screw (72), the other outer end face of the disc spring is in contact with one end of the nylon rod (75), and the other end of the nylon rod (75) and the middle shaft (9) form radial support.

2. A vertical screw conveyor jackshaft radial support arrangement according to claim 1, wherein: the number of the supporting assemblies (7) is four.

3. A vertical screw conveyor jackshaft radial support arrangement according to claim 1, wherein: and a connecting plate (74) is welded on the outer cylindrical surface of the supporting sleeve (71), and round through holes for connecting with the upper middle cylinder body through bolts are formed in two sides of the connecting plate (74).

4. A vertical screw conveyor jackshaft radial support device according to claim 1 or 3, characterized in that: and a rubber sealing ring (8) is sleeved between the supporting sleeve (71) and the round through hole of the upper middle cylinder body (1).

5. A vertical screw conveyor jackshaft radial support arrangement according to claim 1, wherein: rectangular grooves or dovetail grooves are uniformly distributed on the outer cylindrical surface of the middle part of the intermediate shaft (9) along the axial direction.

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