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CN-224230650-U - Feeding screw for rotary kiln

CN224230650UCN 224230650 UCN224230650 UCN 224230650UCN-224230650-U

Abstract

The utility model relates to the field of material conveying equipment, and discloses a feeding screw for a rotary kiln, which comprises a motor, a columnar shell and a main shaft, wherein the motor is fixed outside the shell, the feeding end of the shell is fixed outside the rotary kiln, the discharging end of the shell is inserted into the rotary kiln, the main shaft is rotatably arranged in the shell, a rotating shaft of the motor is connected with a power input end of the main shaft through a coupler, a spiral blade is fixed on the main shaft positioned in the shell, the power output end of the main shaft is connected with the shell through a sliding bearing seat, and a discharging hole of the shell is arranged between the sliding bearing seats of the spiral blade. The utility model has the beneficial effects that the sliding bearing seat is arranged between the power output end of the main shaft and the shell, so that the power output end of the main shaft is supported to form a whole with the shell, the installation difficulty is reduced, the risk of shaft breakage is reduced, and the service life is prolonged.

Inventors

  • LI TAO

Assignees

  • 攀枝花鸿图化工有限公司

Dates

Publication Date
20260512
Application Date
20250515

Claims (5)

  1. 1. A feeding screw for a rotary kiln comprises a motor (1), a columnar shell (2) and a main shaft (3), wherein the motor (1) is fixed outside the shell (2), a feeding end of the shell (2) is fixed outside the rotary kiln, a discharging end of the shell (2) is inserted into the rotary kiln, the main shaft (3) is rotatably installed in the shell (2), a rotating shaft of the motor (1) is connected with a power input end of the main shaft (3) through a coupler, and a helical blade (4) is fixed on the main shaft (3) in the shell (2), and the feeding screw is characterized in that a power output end of the main shaft (3) is connected with the shell (2) through a sliding bearing seat (5), and a discharging port of the shell (2) is formed between the helical blade (4) and the sliding bearing seat (5).
  2. 2. A feed screw for a rotary kiln according to claim 1, wherein the power input end of the main shaft (3) is rotatably connected with the housing (2) through a tapered thrust roller bearing (6), the tapered thrust roller bearing (6) is fixed outside the housing (2) through a bearing box (7), and the bearing box (7) seals the tapered thrust roller bearing (6) through a framework oil seal.
  3. 3. The feeding screw for the rotary kiln according to claim 1, wherein the main shaft (3) is a hollow shaft, a plurality of uniformly distributed exhaust holes (8) are formed in the main shaft (3) located in the shell (2), air inlet holes (9) are formed in the main shaft (3) located outside the shell (2), a shaft sleeve (10) is sleeved on the main shaft (3), the air inlet holes (9) are located in the shaft sleeve (10), a gap between the shaft sleeve (10) and the main shaft (3) is sealed through a packing sealing ring (11), and an air inlet pipe (12) communicated with the air inlet holes (9) is fixed on the shaft sleeve (10).
  4. 4. A feed screw for a rotary kiln according to claim 3, characterized in that the exhaust opening (8) is at an acute angle to the axis of the main shaft (3), which angle faces away from the motor (1).
  5. 5. A feed screw for a rotary kiln according to any of the claims 1-4, characterized in that the feed face of the screw blade (4) is welded with a layer of wear-resistant material, which is made of 85 steel.

Description

Feeding screw for rotary kiln Technical Field The utility model relates to the field of material conveying equipment, in particular to a feeding screw for a rotary kiln. Background Rotary kilns are widely used for mechanical, physical or chemical treatment of solid materials in a plurality of production industries such as building materials, metallurgy, chemical industry, environmental protection and the like, are called rotary kilns, and can be widely used in the chemical production fields such as pyrolysis, drying, roasting, granulation and the like as a multifunctional device. Rotary kilns typically include a rotating drum within which the material is agitated, mixed, and/or flowed to uniformly heat the material and substantially volatilize the components. The Chinese patent (issued publication number: CN221198004U name: a self-preheating reciprocating rotary kiln) comprises a rotary kiln cylinder and a feeding auger cylinder. One end of the rotary kiln cylinder body, which is provided with a feeding and discharging cover, is a first end, the other end is a second end, and the rotary kiln cylinder body is driven by a cylinder body driving device to rotate. A concentric feeding auger cylinder is arranged in the rotary kiln cylinder. The feeding auger cylinder is internally provided with a spiral feeding shaft which is driven by a feeding driving device to rotate. The outer side of the feeding auger cylinder is provided with an outer rotary blade, and materials can be conveyed to the first end from the second end of the rotary kiln cylinder through relative rotation of the outer rotary blade and the rotary kiln cylinder. The feeding screw can realize self-preheating of materials in the feeding auger cylinder by utilizing high-temperature protective gas in the rotary kiln cylinder when feeding is completed, heat of the high-temperature gas is fully utilized, the problems of high cost and large occupied area of independent preheating equipment can be solved, but the feeding screw is discharged from the front end, the front end of the main shaft is in a suspended state, and the main shaft is broken and replaced in a short period due to severe working environment and high-temperature and high-corrosiveness powder. Disclosure of utility model The object of the present utility model is to provide a feed screw for a rotary kiln which overcomes the drawbacks of the prior art. The feeding screw for the rotary kiln comprises a motor, a columnar shell and a main shaft, wherein the motor is fixed outside the shell, the feeding end of the shell is fixed outside the rotary kiln, the discharging end of the shell is inserted into the rotary kiln, the main shaft is rotatably arranged in the shell, a rotating shaft of the motor is connected with the power input end of the main shaft through a coupler, a helical blade is fixed on the main shaft in the shell, the power output end of the main shaft is connected with the shell through a sliding bearing seat, and the discharging port of the shell is arranged between the helical blade and the sliding bearing seat. Preferably, the power input end of the main shaft is rotationally connected with the shell through a tapered roller thrust bearing, the tapered roller thrust bearing is fixed outside the shell through a bearing box, and the tapered roller thrust bearing is sealed by the bearing box through a framework oil seal. Preferably, the main shaft is a hollow shaft, a plurality of uniformly distributed exhaust holes are formed in the main shaft in the shell, air inlet holes are formed in the main shaft outside the shell, a shaft sleeve is sleeved on the main shaft, the air inlet holes are located in the shaft sleeve, a gap between the shaft sleeve and the main shaft is sealed through a packing sealing ring, and an air inlet pipe communicated with the air inlet holes is fixed on the shaft sleeve. Preferably, the included angle between the exhaust hole and the axial lead of the main shaft is an acute angle, and the acute angle is opposite to the motor. Preferably, a wear-resistant material layer is welded on the feeding working surface of the spiral blade, and the wear-resistant material layer is made of 85 steel. Compared with the prior art, the utility model has the beneficial effects that: the sliding bearing seat is arranged between the power output end of the main shaft and the shell, so that the power output end of the main shaft is supported to form a whole with the shell, and the discharge hole is changed from the end part of the shell to the side wall, thereby reducing the risk of shaft breakage and prolonging the service life. Drawings FIG. 1 is a schematic diagram of the structure of the present utility model; FIG. 2 is an enlarged schematic view of a portion of FIG. 1 at A; FIG. 3 is an enlarged partial schematic view of FIG. 1 at B; In the figure, a 1-motor, a 2-shell, a 3-main shaft, a 4-helical blade, a 5-sliding bearing seat, a 6-thrust tapered roller bearing, a 7-b