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2020
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07
Common Fault Analysis of Lead Pumps
Author:
During the normal operation of lead pumps, multiple inspections have revealed a wide variety of failure types. By studying and analyzing the causes of these pump malfunctions, we can identify the key factors leading to the failures, while also optimizing the assembly methods for lead pump components. Additionally, during maintenance, it’s crucial to strictly control installation procedures, enhance the service skills of maintenance personnel, and ultimately extend the operational lifespan of the lead pumps.
At Lead pump During normal operation, multiple inspections revealed a wide variety of faults. Research and analysis are underway. Lead pump Identify the cause of the failure, pinpoint the key factors leading to the malfunction, and implement improvements simultaneously. Lead pump The assembly method of the components. During maintenance, strictly control installation procedures, enhance the service capabilities of maintenance personnel, and extend Lead pump The service life.
The lead pump is primarily driven by an electric motor, which is connected to the pump shaft via a V-belt, causing the impeller to rotate and generate centrifugal force, thereby transferring the qualified molten lead to the next process. Lead pump It is a relatively mature piece of mechanical equipment that has already been used in many household units, so there shouldn’t be any obvious design flaws. However, during actual operation, failures frequently occur, failing to meet operational demands and leading to increased labor intensity. Therefore, this study primarily focuses on analyzing common faults in lead pumps during the lead smelting process, as well as proposing improvements to the equipment components aimed at resolving these issues.
Lead pump Common forms of component damage, cause analysis, and corrective measures
1. Lead Pump Sheath Issue
Lead pump The upper part of the impeller is equipped with a protective sleeve. Its function is to provide protection. Lead pump The main shaft is protected from wear and corrosion and is used to secure the impeller. The sleeve is made of cast iron, and the pump casing and sleeve should have an interference fit. Meanwhile, there should be a clearance fit between the sleeve and the main shaft, ensuring that all components maintain precisely matched dimensions. However, due to wear and corrosion, the mating dimensions of the sleeve may change, which could lead to Lead pump The spindle's exceptionally long service life and Lead pump The volume of liquid being pumped has a significant impact. Based on production experience, Lead pump There are two main types of spindle sleeve failures: sleeve wear and sleeve pitting corrosion.
2. Sheath wear
Lead pump Improper selection of the sheath material, combined with insufficient consideration of high-temperature factors, can lead to abnormal wear of the sheath. Additionally, if the lead pump is not fully preheated during startup—resulting in residual slag lead within the pump that hasn’t completely melted—and the pump is already running, increased resistance will occur, further accelerating wear on the outer casing.
To avoid Lead pump Wear on the coat can be addressed using the following methods: ① Employing high-temperature-resistant materials and proper heat treatment techniques; ② Enhance the machining precision of the jacket to ensure accurate fit dimensions; please refer to the attached drawing for the specific matching dimensions after our company’s modifications. 3.1.1； ③ Lift the lead pump into place ahead of time to preheat it. 20 More than a few minutes, to allow the lead pump to reach its operating temperature and melt the slag lead remaining inside the pump.
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Henan Yuguang Metallurgical Machinery Manufacturing Co., Ltd
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No. 888, West Section of North Ring Road, Kejing Town, Jiyuan City