CN217140659U

CN217140659U - Split type welded structure screw axis of vertical mill of spiral

Info

Publication number: CN217140659U
Application number: CN202221097217.5U
Authority: CN
Inventors: 王赫; 柳晓明; 刘刚; 孟丽娜; 王天林; 刘万华; 季光; 高兴阳; 石鹏; 黄昊; 郭佐时; 郭宜龙
Original assignee: North Heavy Industry Group Co Ltd
Current assignee: North Heavy Industry Group Co Ltd
Priority date: 2022-05-10
Filing date: 2022-05-10
Publication date: 2022-08-09
Anticipated expiration: 2032-05-10

Abstract

A split type welding structure screw shaft of a vertical screw mill belongs to the technical field of mining machinery. The utility model discloses a main shaft, flange, helical blade, a serial communication port, the one end spindle nose of main shaft is provided with the tang, the flange is followed the main shaft sets up the pot head of tang is in the outside of spindle nose to take correspondingly on the tang, the flange with the main shaft welding, the main shaft with a keyway has radially been seted up simultaneously at the terminal surface behind the flange welding, the helical blade welding is in on the surface of main shaft. The utility model discloses structural style is compact and simple, and the preparation is convenient, can effectively reduce manufacturing cost, and is firm reliable to promoted product quality, avoided the cracked phenomenon that the solid forging structure produced at flange and axis body composition surface because of the conduction moment of torsion is too big.

Description

Split type welded structure screw axis of vertical mill of spiral

Technical Field

The utility model belongs to the technical field of mining machinery, specifically relate to a split type welded structure screw axis of vertical mill of spiral.

Background

The spiral vertical mill is a new ore grinding device in the mine industry in recent years, is mainly applied to the ore dressing process, is an important device of the fine grinding process of the mining industry in a new period, and is also a new mark post for fine design of green mines.

The spiral part of the spiral vertical mill plays a role of rotary grinding, and the spiral shaft bears a great torque load. The traditional screw shaft adopts an integral forging mode, the manufacturing cost is very high, and because the flange for connecting the end of the screw shaft and the transmission shaft is integrated with the main shaft, the quality defects of fracture and the like caused by abrupt change of the cross section area often exist on the joint surface of the two parts.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems, the utility model makes up the defects of the prior art and provides a split type welding structure screw shaft of a screw vertical mill; the utility model discloses structural style is compact and simple, and the preparation is convenient, can effectively reduce manufacturing cost, and is firm reliable to promoted product quality, avoided the cracked phenomenon that the solid forging structure produced at flange and axis body composition surface because of the conduction moment of torsion is too big.

In order to achieve the above purpose, the utility model adopts the following technical scheme.

The utility model provides a split type welded structure screw axis of vertical mill of spiral, including main shaft, flange, helical blade, its characterized in that, the one end spindle nose of main shaft is provided with the tang, the flange is followed the main shaft sets up the pot head of tang is in the outside of spindle nose to take correspondingly on the tang, the flange with the main shaft welding, the main shaft with radially seted up a keyway simultaneously at the terminal surface behind the flange welding, the helical blade welding is in on the surface of main shaft.

Further, helical blade is two sets of, two sets of helical blade's structure is the same, and every group helical blade all includes a plurality of helical single blade that weld in proper order, and two sets of helical blade welds symmetrically on the surface of main shaft.

Further, the outer diameter of the shaft head is in interference fit with the inner diameter of the flange.

Further, the flange and the main shaft are welded with each other in a penetration welding mode.

Furthermore, the whole material of the main shaft is carbon structural steel.

Furthermore, the whole material of the flange is low-alloy high-strength structural steel.

The beneficial effects of the utility model.

The utility model discloses a flange is made alone and with the welding of main shaft fusion penetration welding, can avoid traditional structure solid forging structure because of the too big phenomenon of rupture that produces at flange and main shaft composition surface of the torsion conduction, and is firm reliable, has promoted product quality, satisfies the operation requirement of spiral vertical mill to structural style is compact and simple, and the preparation is convenient, and local welded mode can effectively reduce manufacturing cost.

Drawings

In order to make the technical problem, technical scheme and beneficial effect that the utility model solved more clearly understand, it is right to combine the attached drawing and detailed description mode below the utility model discloses further detailed description. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.

Fig. 1 is the side partial section schematic diagram of the welding seam after being polished and leveled.

Fig. 2 is a perspective view of the welding seam of the utility model after being polished and leveled.

Fig. 3 is a side view of the present invention prior to weld grinding.

Fig. 4 is a schematic diagram of the welding position X-groove between the helical single blades of the present invention.

Fig. 5 is a schematic view of the K-shaped groove at the welding position of the helical blade and the main shaft of the present invention.

The labels in the figure are: the structure comprises a main shaft 1, a flange 2, a helical blade 3, a shaft head 4, a spigot 5, a key groove 6 and a helical single blade 7.

Detailed Description

With reference to fig. 1 and 2, the present embodiment provides a split type welding structure screw shaft of a vertical screw mill, which includes a main shaft 1, a flange 2, and a screw blade 3. The main shaft 1 is made of carbon structural steel integrally and has good welding performance. The flange 2 is integrally made of low-alloy high-strength structural steel, has high weldability and cold strain plasticity, and has certain strength, hardness, plasticity and toughness.

As shown in the attached figure 1, a spigot 5 is arranged on one end of a spindle head 4 of a spindle 1, a flange 2 is sleeved outside the spigot 4 from one end of the spindle 1 provided with the spigot 5 and correspondingly lapped on the spigot 5, and the requirement of coaxial positioning of the spindle 1 and the flange 2 and the requirement of axial positioning of the flange 2 are met by arranging the spigot 5.

The inner diameter of the flange 2 is in interference fit with the outer diameter of the shaft head 4, the flange 2 is welded with the main shaft 1 in a penetration welding mode, and after welding, 100% nondestructive inspection is carried out on a welded seam. The welding mode of using the penetration welding can lead the welding position of the flange 2 and the main shaft 1 to be deeply melted, and is firmer and firmer.

The flange 2 is separately manufactured and then combined with the main shaft 1, the split type re-welding mode can reinforce the combination surface of the flange 2 and the main shaft 1, and the fracture phenomenon generated on the combination surface of the flange 2 and the main shaft 1 due to overlarge stress concentration torque is avoided.

As shown in fig. 1 and 2, a keyway 6 has been radially seted up at the terminal surface simultaneously after main shaft 1 and the welding of flange 2, the utility model discloses need pass through flange 2 with the transmission shaft when using and be connected the back, drive the rotation by the transmission shaft, this keyway 6 be used for with the utility model discloses the axle key of the transmission shaft of top mutually supports and realizes the moment transmission.

The helical blades 3 are divided into two groups, and the two groups of helical blades 3 have the same structure. As shown in the attached drawing 3, each group of spiral blades 3 comprises a plurality of spiral single blades 7 which are welded in sequence, as shown in the attached drawing 4, X-shaped groove penetration welding is adopted between the spiral single blades 7, polishing and flattening are carried out after welding, and 100% nondestructive inspection is carried out on welding seams. Two groups of helical blades 3 are symmetrically welded on the outer surface of the main shaft 1, as shown in figure 5, K-shaped groove welding seams are formed at the welding positions of the two groups of helical blades 3 and the main shaft 1, overlaying welding passes are used for transition, penetration welding is carried out, polishing is carried out after welding, and 100% nondestructive flaw detection is carried out on the welding seams. And finally, carrying out wear-resistant glue hanging treatment on the whole spiral shaft.

When the spiral lining plate is used, the spiral lining plate (wearing part) is screwed on the outer edge holes of the spiral blades 3 by bolts (the spiral blades 3 in the conventional technology are all provided with the outer edge holes), and then the spiral blades 3 can be partially arranged in the cylinder body of the spiral vertical mill, and the ore grinding work is started.

It should be understood that the above detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.

Claims

1. The utility model provides a split type welded structure screw axis of vertical mill of spiral, includes main shaft (1), flange (2), helical blade (3), its characterized in that, the one end spindle nose (4) of main shaft (1) are provided with tang (5), flange (2) are followed main shaft (1) sets up the pot head of tang (5) is in the outside of spindle nose (4) to take correspondingly on tang (5), flange (2) with main shaft (1) welding, main shaft (1) with a keyway (6) have radially been seted up simultaneously at the terminal surface behind flange (2) welding, helical blade (3) welding is in on the surface of main shaft (1).

2. The split-type welding structure screw shaft of the screw vertical mill according to claim 1, wherein the screw blades (3) are in two groups, the two groups of screw blades (3) have the same structure, each group of screw blades (3) comprises a plurality of screw single blades (7) which are welded in sequence, and the two groups of screw blades (3) are symmetrically welded on the outer surface of the main shaft (1).

3. The split welding structure screw shaft of the screw vertical mill according to claim 1, wherein the outer diameter of the shaft head (4) is in interference fit with the inner diameter of the flange (2).

4. The split welding structure screw shaft of the screw vertical mill according to claim 1, wherein the flange (2) and the main shaft (1) are welded to each other by means of penetration welding.

5. The split welding structure screw shaft of the vertical screw mill according to claim 1, wherein the main shaft (1) is made of carbon structural steel.

6. The split welding structure screw shaft of the vertical screw mill according to claim 1, wherein the flange (2) is made of low-alloy high-strength structural steel.