The main components of high-temperature heat transfer oil pump and parts quality standards and overhaul High-temperature heat transfer oil pump is a more special form of positive displacement pump. It relies on a diaphragm to move back and forth to change the studio volume to inhale and discharge liquid.
(A) high-temperature heat transfer oil pump mainly by the transmission part and the diaphragm head two major components
Driven part is driven diaphragm driven back and forth, its transmission in the form of mechanical transmission, hydraulic transmission and pneumatic transmission. Po Taibang where the more widely used is hydraulic drive. The working part of the high-temperature heat-conducting oil pump is mainly composed of a crank connecting rod mechanism, a plunger, a hydraulic cylinder, a diaphragm, a pump body, a suction valve and a discharge valve, and the driving mechanism formed by the crank shaft, the connecting rod, Reciprocating piston pump is very similar.
When the high-temperature heat-conducting oil pump is working, the crank and rod mechanism drives the plunger to reciprocate driven by the motor. The motion of the plunger is transmitted to the diaphragm through the working fluid (usually oil) in the cylinder so that the diaphragm moves back and forth. High-temperature heat transfer oil pump cylinder head part of the diaphragm will be mainly by the liquid to be separated from the working fluid, when the diaphragm moves to the side of the transmission mechanism, the pump cylinder negative pressure suction chamber and inhalation of liquid; when the diaphragm to the other side When the liquid is discharged. The liquid being delivered is separated from the working fluid by the diaphragm in the pump cylinder and comes in contact with only the pump inner side of the pump cylinder, the suction valve, the discharge valve and the diaphragm without contacting the plunger and the sealing device, Plunger and other important parts completely work in the oil medium, in good working condition.
Diaphragm should have good flexibility, but also have good corrosion resistance, usually made of PTFE, rubber and other materials. Diaphragm on both sides of the mesh pot with the bottom of the parts is to prevent excessive local deformation of the membrane set, - commonly known as the diaphragm limiter. High-temperature heat-conducting oil pump seal performance is better, can easily achieve leak-free operation, can be used to transport acid, alkali, salt and other corrosive liquids and high viscosity liquid.
(B) parts quality standards and overhaul
Import and export valves
Valve seat and the valve head should have a good anastomosis, anastomosis width of 0.25 ~ 2.00mm, and the above can not have rust, pitting and other defects. If it fails to meet the requirements, it can be combined with machining and centering percussion. Serious corrosion, the seat should be replaced.
Diaphragm
Diaphragm should be smooth, no scratches, flexibility to meet the requirements.
2. Control valve
Adjust the pressure valve valve core and valve match closely, 5 minutes kerosene leakage test, no more than one drop of leakage. According to the damage can be taken accordingly machining, centering percussion method or grinding method repair. Can not be repaired, then replaced.
3. Electric pump body parts
Plunger and guide sleeve with the size tolerance of H8 / g8, roundness of 0.02mm, straightness of 0.02mm, the surface roughness of RaO.8, the surface hardness of 45? 55HRC.
Coordinate with shaft diameter and positioning shaft diameter coaxiality 0.02mm. The maximum amount of grinding plunger 0.01D (D is the diameter).
4. Guide sleeve
Concentricity of inner diameter and outer diameter is 0.02mm. With the plunger size tolerance H8 / g8. Seal should have good elasticity, no aging cracks, with the plunger without scratches.
Main journal, crank neck and bush with the tolerance of G7 / h6, roundness 0.02mm, straightness 0.02mm, the surface roughness of the degree of ^ 0.8pm. Main journals and crankshaft maximum grinding is 0.04 times the diameter.
5. Crankshaft bearing shells
With the bush with no scratching surface furring phenomenon, the surface roughness with bearing shell shell with the surface of the guide hole perpendicularity 0.02mm. After the two bearing shell combination, both ends of the guide hole coaxiality 0.02mm.
6. Crankcase
With bearing shell shell size tolerance H7 / g6, with the crank with the size tolerance G7 / h6, with the surface roughness hl.6fxm. Tile keyway and positioning keys with the size tolerance of H7 / g7.
7. Crank sleeve
With the main journal with the size tolerance of H7 / g6, the surface roughness of the inner diameter and outer diameter of 0.02mm
8 axis
With the sleeve size tolerance of H7 / g6. Roundness 0.02mm, straightness 0.02mm, surface roughness RaO.8 / jnn, quenched and tempered. With the journal and positioning journal coaxiality is 0.02mm. The maximum grinding amount of 04. times the diameter.
9. Central sleeve
Surface roughness. The inner diameter and outer diameter of the coaxiality of 0.02
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