All-tooth profile engaged dedicated gear
A tooth profile and meshing technology, applied in the direction of rotary piston/oscillating piston pump components, machines/engines, pump components, etc., can solve problems such as thermal cracking and curing phenomena
Inactive Publication Date: 2008-10-22
DONGHUA UNIV
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Problems solved by technology
[0007] The technical problem to be solved by the present invention is to provide a special gear with full tooth profile meshing, so as to solve the defect of solidification or thermal cracking in the closed space when the polymer fluid is transported due to insufficient meshing degree in the prior art
Method used
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Effect test
Embodiment 1
[0033] The basic parameters of the gear are: the modulus of the gear end face m t =10.8857, the number of teeth of 2 meshing gears z 1 =z 2 =14, end face pressure angle α t =30°, tooth width b=127mm, helix angle β=15°, gear center distance a=152.4mm.
Embodiment 2
[0035] Gear basic parameters: gear end face modulus m t =2.6, the number of teeth of 2 meshing gears z 1 =z 2 =42, end face pressure angle α t =30°, tooth width b=45mm, helix angle β=10°, gear center distance a=109.2mm.
Embodiment 3
[0037] Basic parameters of gear: end face pressure angle α t =30°, 2 meshing gear teeth number Z 1 = Z 2 =14, gear end face modulus m t =12.856, helix angle β=21°2'22", gear center distance a=180mm, tooth width b=110mm.
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The invention relates to a special gear of whole tooth profile meshing. A convex tooth profile curve of the special gear of the whole tooth profile meshing is an involute, while a concave tooth profile curve is a transition line, and a point S is used as a borderline. The tooth profile is formed by connecting smoothly and orderly a tooth point arc, a tooth angle curve EM, a tooth side special tooth profile curve MS, a transition curve SA between the tooth profile and a tooth root and a tooth root circular arc curve, and the meshing way is the whole tooth profile meshing; and a gear rotor of the special gear of the whole tooth profile meshing is a sealing moulding face of the whole tooth profile meshing, thereby eliminating meshing leakage, and eliminating excellently solidification phenomenon and pyrolysis phenomenon formed by fluid in an enclosed space when polymer is conveyed.
Description
technical field [0001] The invention belongs to the field of gears used in polymer conveying gear pumps, and in particular relates to a full tooth profile meshing gear. Background technique [0002] Gear pumps for polymer delivery are mainly used to transport high temperature, high pressure viscous polymers in petrochemical industrial processes, or used together with single-screw or twin-screw extruders, so that the polymer extruded by the extrusion molding machine The melting material changes from low pressure to high pressure, eliminating fluctuations in output, feeding materials into the machine head stably, increasing output and ensuring quality. Plastics, rubber, and fibers can all be shaped this way. my country's petrochemical industry has introduced many gear pumps for polymer transportation from a large number of complete sets of major technical equipment imported from abroad. Most of these pumps are the heart equipment of the complete set of equipment. The polymer...
Claims
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IPC IPC(8): F04C15/00
Inventor 甘学辉马晓建陈革贾春红
Owner DONGHUA UNIV
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