Gear meshing side clearance standard
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│ center distance │ 50 │51-80 │81 │120 │120-200 │
├ ─ ─ ─ ─ ─ ┼ ─ ─ ─ ┼ ─ ─ ─ ┼ ─ ─ ─ ─ ┼ ─ ─ ─ ─ ┤
│0.085 │0. 105│0. 13 │0. 17 │
└ ─ ─ ─ ─ ─ ┴ ─ ─ ─ ┴ ─ ─ ─ ┴ ─ ─ ─ ─ ┴ ─ ─ ─ ─ ┘
Meshing gear pump contact should comply with the specification, the inspection method is as follows, first clean the two transmission gears, bearings, such as pump shell parts with dry cloth to wipe dry after two gear mesh surface, in the small gear meshing surface coated with a thin layer of red lead oil back to the two gear and end cover, according to the job rotation diffuse slow rotation gear pump after several times, remove the pump cover to take out the two gear shaft, check the contact spots.
Gear meshing contact spots should be uniform, the contact area along the tooth length not less than 70, along the tooth height not less than 50%0
(3) The clearance between gear and shell and gear and pump cover adjustment tooth tip and shell wall and gear end face and end cover should conform to the specification.
KCB gear oil pump clearance is too large and its liquid leakage becomes larger; If the clearance is too small, the tooth tip of the gear and the shell wall of the pump body, the end face of the gear and the end face of the pump cover may be worn when the gear rotates. Therefore, the clearance of these two aspects must be checked during maintenance.
The radial clearance between the gear and the shell can be checked with a feeler gauge, and the clearance value is. 15-0. 25mm, but must be greater than the journal in the radial clearance of the bush.
Gear end and the end cover axial clearance check method of lead wire are available, and its operating process is as follows: first, open end cover cleaning parts, parts surface oil pollution, sundry, put the gear pump body, the pump cover face and gear face symmetry respectively put four suitable lead wire, back to the pump gland, symmetrical evenly after the bolt, Disassemble the cover and take the lead wire thickness. If the thickness of the lead wire on the end face of the gear minus the thickness of the lead wire on the end face of the pump cover is positive, it indicates that there is a gap on the two end faces; If the result is negative, it indicates that there is a gap between the two ends. According to the measurement results, pad the end face or reduce the end face clearance in 0. 10-0. 15mm.
