HG/T 2043-1991 Technical Specifications for Three-blade Backward Curved Agitator HG/T2043-1991 Standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
HG/T2043-91
Technical Conditions for Three-blade Backward Curved Agitator
Published on July 6, 1991
Ministry of Chemical Industry of the People's Republic of Chinabzxz.net
Implementation on January 1, 1992
Chemical Industry Standard of the People's Republic of China
Technical Conditions for Three-blade Backward Curved Agitator
Subject Content and Scope of Application
This standard specifies the requirements for the manufacture, inspection, packaging, storage and transportation of three-blade back-curved agitators. This standard applies to steel welded three-blade backward curved agitator (hereinafter referred to as agitator). 2 Reference standards
GB 191
GB 912
GB 983
GH 985
GB1095
GB1801
GB:1804
GB 3274
GB 3280
GB4237
GB 117
GB 5118
GB 6388
Packaging, storage and transportation illustrations and labels
Technical conditions for carbon steel and low alloy steel thin platesStainless steel welding rods
Basic types and dimensions of weld grooves for gas welding, manual arc welding and gas shielded weldingSurface dimensions of flat keys and chain grooves
Tolerances and fitsDimensions up to 500 mmTolerance zones and matching tolerances and fits for holes and shaftsLimit deviations of dimensions without tolerancesTechnical conditions for hot-rolled thick plates and strips of carbon steel and low alloy steelCold-rolled stainless steel plates
Hot-rolled stainless steel plates
Carbon steel welding rods
Low alloy copper welding rods
Marks for shipping and receiving of transport packaging
ZB G 92001
HG / T 2123
Agitator shaft diameter series
Agitator types and main parameters
HG5-1543
General technical conditions for rubber machinery packaging
3 Structure and main parameters
3.1 The structure of the agitator is shown in Figure 1.
3.2 When the diameter of the agitator is greater than 800mm, the root of its blades should generally be provided with reinforcing ribs. Approved by the Ministry of Chemical Industry of the People's Republic of China on July 6, 1991 HG/T 2043 --- 91
Implementation on January 1, 1992
HG/T 2043 —91
D, agitator group diameter; blade outer net radius; blade back sleeve angle; blade upturn angle: b-blade width
3,3 The diameter D of the agitator and the main parameters shall comply with the provisions of HG/T2123, 3. 4 The diameter series of the agitator shaft shall comply with the provisions of ZB G 92001. 4 Technical requirements
4.1 The blade and reinforcing rib plate of the agitator shall be made of carbon structural steel plate in accordance with the requirements of GB912 and GB3274. The stainless steel plate shall be selected in accordance with the requirements of GB3280 and GB-4237.
4.2 The type and size of the welding joint of the agitator shall comply with the requirements of GB985. The welding between the blade and the impeller shall be continuous welding, and the connection between the blade and the reinforcing rib plate can be intermittent welding. The welding rod shall be selected in accordance with the requirements of GB5117, GB5118 and GB983. 43 The plane formed by the shaft hole of the agitator and the three blade endpoints should be perpendicular, and the verticality tolerance is 0.2% of the agitator diameter D, and does not exceed 3mm. The shaft hole limit tolerance is based on the H8 grade shaft hole surface roughness R of GB1801, which is no more than 3.2um. 44 The dimensions of the agitator wheel are determined by the construction drawing. The dimensions and limit deviations of the wheel keyway shall comply with the provisions of G1095, of which the limit deviation of the key width shall be D10 or Js9.
4.5 The limit deviations of the diameter of the agitator and the uninscribed tolerance dimensions of the machined surface shall comply with the requirements of Grade IT14 specified in GB1804, and the limit deviations of the uninscribed tolerance dimensions of the non-machined surface shall comply with Grade 1T16 requirements. 4. The surface of the agitator shall be free of sharp points and hairs, and the blades shall be smooth. 4.7 Balance of the agitator
HG / T 2043 — 91
4.7.1 When the linear velocity of the blade end of the agitator is less than 5m/s, the static balance test may not be performed, but the blade and the reinforcing rib plate shall have good stability and symmetry to reduce the unbalanced weight. When the linear velocity is not less than 5m/s, a static balance or dynamic balance test is required. If the agitator shaft adopts flexible transmission, a dynamic balance test shall be performed. 4.7.2 Balancing accuracy A, see Table 1.
(design force), MPa
n(stirring shaft speed) r/min
Vacuum equipment
p-0. 1~0. 6, n≤60
p= 0. 1 ~ 0. 6, n> 60
0. 660
1. 6
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