The NCB stainless steel high viscosity gear pump is not in the correct direction. When the rotation direction of the pump is not correct, the high pressure oil will pass directly to the oil seal. Since the low pressure skeleton oil seal can only withstand a pressure of 0.5 MPa at most, the oil seal will be punched out of the NCB stainless steel "target=_blank> stainless steel high viscosity gear. The reasons for the pump oil seal being flushed out are mostly related to the cleanliness of the hydraulic oil. If the oil is not selected correctly or the cleanliness of the oil in use does not meet the standard requirements, it will accelerate the internal wear of the pump, resulting in that leak. Therefore, mineral hydraulic oil containing additives should be used to prevent oxidation and bubble generation. The viscosity of the oil is (16 ~ 80) × 10-6m2 / s. The filtration accuracy is: the input oil path is less than 60μm. Observing the bushings and side plates of the NCB stainless steel "target=_blank> stainless steel high-viscosity gear pump, if all the oil's cleanliness is poor, the groove surface will be obviously grooved, and the normal wear of the NCB stainless steel" target =_blank>Stainless surface of stainless steel high viscosity gear pump will only produce uniform surface marks.
(1) NCB stainless steel "target=_blank> stainless steel high-viscosity gear pump is not in the correct direction. When the rotation direction of the pump is not correct, the high-pressure oil will directly pass to the oil seal. Because the general low-pressure skeleton oil seal can only withstand a pressure of 0.5MPa at most. Therefore, the oil seal will be flushed out.
(2) NCB stainless steel "target=_blank> stainless steel high-viscosity gear pump bearings are subjected to axial force. The axial force is often combined with the NCB stainless steel "target=_blank> stainless steel high-viscosity gear pump shaft extension end and the coupling sleeve. Tightly related, that is, the pump is hammered by a hammer or hardened by a mounting Screw to provide a backward axial force. When the pump shaft rotates, this backward axial force will force the wear inside the pump to increase. Since the NCB stainless steel "target=_blank> stainless steel high-viscosity gear pump is internally sealed by the gear end face and the end face of the bushing, when the axial seal end face is seriously worn, the internal axial seal of the pump will produce a certain gap, resulting in The high and low pressure oil chamber communicates and the oil seal is flushed out. This situation is more common in the dump truck industry, mainly due to the irregular size of the coupling sleeve on the main engine.
(3) NCB stainless steel "target=_blank> stainless steel high viscosity gear pump is subjected to excessive radial force. If NCB stainless steel "target=_blank> stainless steel high viscosity gear pump is installed with poor coaxiality, Botou Taibang pump The valve will cause the pump to receive radial forces beyond the end of the oil seal, which will cause the oil seal to leak oil. At the same time, it will also cause damage to the floating bearing inside the pump.
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What are the reasons for the stainless steel high-viscosity gear pump oil seal to be flushed out? "> Edit: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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