Drum-shaped toothed rail wheel for coal mining machine and preparing method of drum-shaped toothed rail wheel

A technology of drum-shaped teeth and rack wheels, which is applied in mechanical equipment, belts/chains/gears, earthwork drilling, etc., can solve the problem that tooth surfaces and edges are easy to be contacted and squeezed, shortening the service life of rack wheels, and coal mining To solve the problems such as the increase of the load of the machine walking, to achieve the effect of excellent anti-eccentric load performance, reduce contact stress, and reduce vibration

Active Publication Date: 2020-12-11
XIAN COAL MINING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rack wheel itself is a special gear that meshes with the pin row on the scraper conveyor. It belongs to open transmission and must adapt to the test of complex geological conditions such as variable pitch and no lubrication. When the wheel meets the horizontal bending and vertical bending changes of the working surface or suffers from gangue and other debris, the tooth surface and edge are easily contacted and squeezed, the load is unbalanced, and the unbalanced load occurs, resulting in increased transmission impact and increased wear of the rack wheel , but short-term excessive wear or broken teeth are abnormal damage
Especially for high-power and heavy-duty shearers, because of their great weight and fast traction, they will inevitably bring greater traction resistance, which will increase the walking load of the shearer, easily cause abnormal damage to the rack wheel, and greatly shorten the The service life of the rack wheel has seriously affected the normal operation of the shearer and caused unnecessary economic losses to the coal mine

Method used

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  • Drum-shaped toothed rail wheel for coal mining machine and preparing method of drum-shaped toothed rail wheel
  • Drum-shaped toothed rail wheel for coal mining machine and preparing method of drum-shaped toothed rail wheel
  • Drum-shaped toothed rail wheel for coal mining machine and preparing method of drum-shaped toothed rail wheel

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 , figure 2 with image 3 As shown, the drum-shaped rack wheel 1 for a coal shearer in this embodiment includes a rack wheel main body 1-1 and a plurality of drum-shaped teeth 1-2 surrounding the outer edge of the rack wheel main body 1-1 , the tooth surface of the drum-shaped tooth 1-2 smoothly transitions to an arc drum-shaped surface from the center line of the tooth surface to both sides, forming a drum-shaped tooth surface. The meshing lines coincide, and the center position of the rack wheel main body 1-1 is provided with a bearing matching through hole 1-3 that is matched with the bearing. The surface of the rack wheel main body 1-1 is along the bearing matching through hole 1-3 3 is surrounded by a plurality of connection keys 1-4.

[0044] Such as Figure 4 with Figure 5 As shown, the use state of the drum rack wheel of the present invention is: the driving gear 2 equipped with the bearing sleeve 3, the bushing 4, the distance sleeve 5, t...

Embodiment 2

[0047] This embodiment includes the following steps:

[0048] Step 1. Carry out vacuum smelting of 18Cr2Ni4WA alloy steel, and then carry out secondary refining outside the furnace to obtain the drum-shaped rack wheel precursor;

[0049] Step 2, forging the drum rack wheel precursor obtained in step 1, then normalizing, and then tempering after air cooling, to obtain the drum rack wheel precursor after tempering; the forging The forging ratio is 3.5, the temperature of the normalizing treatment is 960°C, the temperature of the tempering treatment is 640°C, the grain size of the drum rack wheel precursor after the tempering is 7 grades, with Symptomatic tissue is grade 2;

[0050] Step 3: Carrying out contour processing and rough machining of the tooth shape of the drum-shaped rack wheel precursor after tempering obtained in step 2, and then performing aging treatment to obtain the drum-shaped rack wheel blank; the outline The machining and rough machining of the gear tooth p...

Embodiment 3

[0058] This embodiment includes the following steps:

[0059] Step 1. Carry out vacuum smelting of 18Cr2Ni4WA alloy steel, and then carry out secondary refining outside the furnace to obtain the drum-shaped rack wheel precursor;

[0060] Step 2, forging the drum rack wheel precursor obtained in step 1, then normalizing, and then tempering after air cooling, to obtain the drum rack wheel precursor after tempering; the forging The forging ratio is 3.2, the temperature of the normalizing treatment is 940°C, the temperature of the tempering treatment is 650°C, the grain size of the drum rack wheel precursor after the tempering is 7 grades, with Symptomatic tissue is grade 2;

[0061] Step 3: Carrying out contour processing and rough machining of the tooth shape of the drum-shaped rack wheel precursor after tempering obtained in step 2, and then performing aging treatment to obtain the drum-shaped rack wheel blank; the outline The machining and rough machining of the gear tooth p...

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Abstract

The invention discloses a drum-shaped toothed rail wheel for a coal mining machine. The drum-shaped toothed rail wheel comprises a toothed rail wheel main body and a plurality of drum-shaped teeth, wherein the tooth surface of each drum-shaped tooth smoothly transitions into an arc drum-shaped curved surface from the tooth surface center line to the two sides so as to form a drum-shaped tooth surface; a bearing matching through hole is formed in the center of the toothed rail wheel main body; and a plurality of connecting keys are arranged on the surface of the toothed rail wheel main body. The invention also discloses a preparing method of the drum-shaped toothed rail wheel for the coal mining machine, and the drum-shaped toothed rail wheel is obtained by processing 18Cr2Ni4WA alloy steelby means of the method. According to the drum-shaped toothed rail wheel for the coal mining machine and the preparing method of the drum-shaped toothed rail wheel, the meshing contact area between the drum-shaped toothed rail wheel and a pin row is increased through the drum-shaped tooth surfaces, the contact stress between the drum-shaped toothed rail wheel and the pin row is reduced, the service life of the drum-shaped toothed rail wheel is prolonged, and the drum-shaped toothed rail wheel has the advantages of excellent eccentric load resistance, stable transmission and strong bearing capacity; and through refining, forging, heat treatment, carburization and shot blasting, the tensile strength, bending strength, contact strength and toughness of the drum-shaped toothed rail wheel are improved.

Description

technical field [0001] The invention belongs to the technical field of rack wheels for coal shearers, and in particular relates to a drum-shaped rack wheel for coal shearers and a preparation method thereof. Background technique [0002] The traction mode of modern coal shearer is airborne AC variable frequency speed regulation rack-pin-rail type chainless traction, and its walking is completely dependent on the rack wheel on the pin row, which is similar to the gear-rack type transmission, which converts the output torque of the traction part It is the traction force and traction speed of the traveling mechanism, driving the shearer to walk, and it is a heavy-duty force-bearing part. The rack wheel itself is a special gear that meshes with the pin row on the scraper conveyor. It belongs to open transmission and must adapt to the test of complex geological conditions such as variable pitch and no lubrication. When the wheel meets the horizontal bending and vertical bending ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H55/17F16H55/06F16H55/08E21C29/22C22C38/44C21D9/32C23C8/00B23P15/14
CPCF16H55/06F16H55/08F16H55/17E21C29/22C22C38/44C21D9/32C23C8/00B23P15/14
Inventor 田鹏涛赵书斐郑晓春豆斌杨小毅李涛朱科
Owner XIAN COAL MINING MACHINERY
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