Tooth roller structure of double-tooth-roller type power crusher

Abstract

The invention discloses a tooth roller structure only adopting a spindle and toothed plate combined structure, and the spare part quantity of a machine is reduced. Integration of a spindle and a toothed plate of the tooth roller structure allows the spindle to bear higher shear force, torque and impact loads. By designing a clamping block and a barrel, the toothed p late and the spindle are fixedindirectly, so that the spindle is protected against damage to a higher extent, and the service life of the machine is greatly prolonged. Due to improvement of the fixing mode, the toothed plate is prevented from dislocating in the process of collision and extrusion with materials, and the overhaul amount of the machine is reduced. The required rotating spiral line is obtained for the spindle design of the tooth roller structure by machining, and the machine can obtain a higher discharge passage rate. The novel tooth roller structure greatly improves the spiral mode of the crusher, improves the discharge efficiency, improves the stability and reliability of the crusher, prolongs the service life of the crusher, greatly shortens the overhaul time of the crusher, prolongs the usage period ofquick-wear parts and greatly reduces the production cost.

Description

technical field [0001] The invention relates to a mechanical part of a crusher, in particular to a toothed roller structure of a double toothed roller type powerful crusher. Background technique [0002] The crushing of materials is an indispensable process in the production of products in many industries (such as milling, metallurgy, mining, chemical industry, building materials, road construction, etc.); The toothed roller assembly mainly includes the main shaft, the tooth plate, and the bearing; the main shaft is the most important working part of the crusher, and the tooth plate is an important working part that directly contacts the material. strength and toughness, and choose bearings that can withstand heavy impact loads; due to the working characteristics of the crusher, the toothed rollers have to bear the frequent mechanical impact and extrusion force of the material for a long time, and the design and fixing method of the tooth plate become more and more important...

AI Technical Summary

Problems solved by technology

[0003] The toothed roller structure of the existing powerful double-toothed roller crusher includes the main shaft, the toothed plate, the bearing part, the left retaining ring, and the right retaining ring; the following description is made for the toothed roller structure of the commonly used crusher, figure 1 and figure 2 The toothed roller structure shown is composed of a main shaft, a toothed sleeve and a toothed plate, commonly known as the "three-piece toothed plate type" structure; the fixing bolts of the toothed plate with this structure are large, and the nuts are easy to retreat during rotation, causing the toothed plate to collide or the risk of falling off; the nuts and bolt tails are exposed to the material, which is easy to wear and tear, resulting in the inability to perform secondary maintenance and replacement; and after the tooth plates are arranged in a circle, the helix cannot be formed, and the discharge efficiency is low, resulting in waste of power consumption for meshing and biting materials

[0004] image 3 and Figure 4 The toothed roller structure shown is composed of a main shaft, a toothed sleeve, and a toothed cap, commonly known as the "three-piece toothed cap" structure; the biggest disadvantage of this structure is that one bolt falls off, and the three interlocking toothed caps all fall off. ; And the manufacture of the cap core of the toothed cap is too troublesome and the production cost is too large

[0005] Figure 5 The structure of the toothed roller shown is composed of the main shaft, the tooth sleeve, the pick, and the pick seat (the seat is welded on the tooth sleeve), commonly known as the "three-piece pick type" structure; the tooth sleeve and the pick seat of this structure are connected by welding , The pick is installed on the pick seat, and the rear part is positioned by a circlip. This design structure has defects. The tooth sleeve and the pick seat are made of alloy steel, and the welding performance is poor. After fatigue wear, it is easy to crack or fall off. Replace it At that time, the site did not have the conditions for heating and heat preservation welding, so after repeated welding, the material structure of the gear hub changed, and the welding strength and performance became worse and worse; Broken tooth fatigue failure, easy to fall off and lose

[0006] The gear sleeves of the above three structures are easily deformed and damaged after long-term collision and impact, and it is difficult to ensure the fixation of the gear plate; when the gear sleeve is maintained and replaced, it is also a kind of damage to the main shaft; the fastening method between the gear plate and the gear sleeve has The biggest disadvantage is that the bolts or circlips are easy to loosen, and the maintenance investment in the later period is large; Figure 5 Take the on-site maintenance of the toothed roller structure as an example: the amount of lost picks per day is 8-15 (180 yuan each), and the lost pick holders are 5-10 (500 yuan each), and the daily maintenance time takes about 2 -3 hours (150 yuan per hour for labor and consumables), 3-5 people participate in each maintenance; the annual maintenance cost is at least (8*180+5*500+2*150*3)*365 = 1.767 million yuan, huge economic loss and a lot of manpower and material resources

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