Improved single-tooth roller easy to maintain

Abstract

An improved single-tooth roller easy to maintain relates to the technical field of single-tooth rollers and comprises a spindle, a sleeve and roller teeth, one end of the spindle is connected with the tail of a sintering machine, the sleeve is sleeved outside the spindle and is cylindrical, the roller teeth are arranged on the outer wall of the sleeve, the number of the roller teeth is multiple, and the roller teeth are evenly distributed on the outer circumferential surface of the sleeve. Three roller teeth are arranged on the same circumferential face, and the positions of the roller teeth on every two adjacent circumferential faces are staggered. According to the improved single-tooth roller easy to maintain, the online service life of the single-tooth roller is prolonged; the maintenance frequency of the single-tooth roller is reduced, and manpower is saved; and meanwhile, the maintenance cost is also reduced.

Description

Technical fields:

[0001] This utility model relates to the field of single-tooth roller technology, and specifically to an improved single-tooth roller that is easy to maintain. Background technology:

[0002] Single-toothed rollers are used at the tail end of sintering machines to crush hot sintered ore at 700-800℃. Due to the continuous nature of the sintering production process, the lifespan of single-toothed rollers is significantly reduced, with a new single-toothed roller having a service life of approximately 12 months. The original repair process involved filling the worn areas with Q235 steel plates and then using YD351 welding wire (diameter kφ1.2) for surface welding, achieving a surface hardness of HRC52. Single-toothed rollers repaired using this process required maintenance after only 6 months. To extend the online service life of single-toothed rollers, the repair process needs to be improved. This will increase impact resistance and significantly extend the service life of the single-toothed rollers. Utility Model Content:

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an improved, easy-to-maintain single-tooth roller, which increases the online service life of the single-tooth roller, reduces the frequency of maintenance, and saves manpower.

[0004] To address the problems existing in the background technology, the present invention adopts the following technical solution: including a main shaft, a sleeve, and roller teeth, one end of the main shaft is connected to the tail of the sintering machine, the main shaft is sleeved with a sleeve, the sleeve is cylindrical, roller teeth are provided on the outer wall of the sleeve, the number of roller teeth is several, the roller teeth are evenly distributed on the outer circumferential surface of the sleeve, three roller teeth are provided on the same circumferential surface, and the positions of the roller teeth on two adjacent circumferential surfaces are staggered;

[0005] The single-tooth roller, composed of the main shaft, sleeve, and roller teeth, is made of welding wire with a diameter of φ2.8. Its main chemical components are: carbon (C), manganese (Mn), silicon (Si), chromium (Cr), vanadium (V), nickel (Ni), tungsten (W), and molybdenum (Mo).

[0006] The proportions of each chemical component are as follows: carbon (C) 3.5-5.5%, manganese (Mn) ≤1%, silicon (Si) ≤2%, chromium (Cr) 25-30%, vanadium (V) ≤2%, nickel (Ni) ≤1%, tungsten (W) ≤5%, and molybdenum (Mo) 2-3%.

[0007] The end face where the roller teeth connect to the sleeve is wider than the tip face, and the tip of the roller teeth is hook-shaped.

[0008] The optimal percentage content of molybdenum (Mo) is 2.5%.

[0009] The beneficial effects of this utility model are:

[0010] 1. Increased the online service life of single-tooth rollers.

[0011] 2. Reduced the frequency of single-tooth roller maintenance, saving manpower.

[0012] 3. Reduce downtime of sintering machine.

[0013] 4. Reduced maintenance costs. Attached image description:

[0014] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed implementation method:

[0015] Refer to each Figure 1 The present invention specifically adopts the following implementation method: it includes a main shaft 1, a sleeve 2, and roller teeth 3. One end of the main shaft 1 is connected to the tail of the sintering machine. The main shaft 1 is covered by a sleeve 2, which is cylindrical. Roller teeth 3 are provided on the outer wall of the sleeve 2. The number of roller teeth 3 is several. The roller teeth 3 are evenly distributed on the outer circumferential surface of the sleeve 2. Three roller teeth 3 are provided on the same circumferential surface. The roller teeth 3 on two adjacent circumferential surfaces are staggered. The end face of the roller teeth 3 connected to the sleeve 2 is wider than the tip end face. The tip of the roller teeth 3 is hook-shaped.

[0016] The single-tooth roller formed by the main shaft 1, sleeve 2 and roller teeth 3 is made of welding wire with a diameter of φ2.8. Its main chemical components are: carbon (C), manganese (Mn), silicon (Si), chromium (Cr), vanadium (V), nickel (Ni), tungsten (W) and molybdenum (Mo).

[0017] The chemical composition is as follows: carbon (C) 3.5–5.5%, manganese (Mn) ≤1%, silicon (Si) ≤2%, chromium (Cr) 25–30%, vanadium (V) ≤2%, nickel (Ni) ≤1%, tungsten (W) ≤5%, and molybdenum (Mo) 2–3%. The optimal percentage content of molybdenum (Mo) is 2.5%.

[0018] The main alloy chemical composition of the existing single-tooth roller is (%): Cr26, Mn1.26, V0.95, Mo1.36, W1.2, Ni0.11.

[0019] The improved welding wire used is grade LJ6422 with a diameter of φ2.8. Its chemical composition (%) is C 3.5-5.5, Mn≤1, Si≤2, Cr 25-30, V≤2, Ni≤1, W≤5, Mo 2.5. The changed welding wire allows for fusion with the base material and the original repair layer (YD351 welding wire), and improves the hardness and wear resistance of the roller's working surface.

[0020] A comparison based on actual usage shows: the original single-toothed roller repair cost was 245,000 yuan, with an online service life of 6 months. Each of the two sintering machines in the ironmaking plant has one single-toothed roller, resulting in an annual repair cost of 980,000 yuan. The new process single-toothed roller repair cost was 145,000 yuan, with the repaired roller available for 12 months of online service, resulting in an annual repair cost of 290,000 yuan. This new process repair solution can save 690,000 yuan annually in single-toothed roller repair costs.

[0021] In summary, this improved, easier-to-maintain single-toothed roller increases its online service life, reduces maintenance frequency, saves manpower, and shortens sintering machine downtime.

Claims

1. An improved single toothed roller for ease of maintenance, characterized by: It comprises a main shaft (1), a sleeve (2) and a roller tooth (3), one end of the main shaft (1) is connected with the tail of a sintering machine, the main shaft (1) is sleeved with the sleeve (2), the sleeve (2) is in the shape of a cylinder, the outer wall of the sleeve (2) is provided with the roller tooth (3), the number of the roller tooth (3) is several, the roller tooth (3) is equally distributed on the outer circumferential surface of the sleeve (2), three roller teeth (3) are provided on the same circumferential surface, and the positions of the roller teeth (3) on the adjacent two circumferential surfaces are staggered; the single-tooth roller composed of the main shaft (1), the sleeve (2) and the roller tooth (3) is made of welding wire with a diameter of φ2.

8.

2. The improved single toothed roller easy to maintain as claimed in claim 1 wherein: The end surface of the roller tooth (3) connected with the sleeve (2) is wider than the tip end surface, and the tip end of the roller tooth (3) is in the shape of a hook.

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