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(LRZ) bearing correct derusting method

Update time:2018-08-13 Click:224

First, anti-rust method

Surface pretreatment method for anti-rust:

1) Surface cleaning: Cleaning must be based on the nature of the surface of the anti-rust and the current Conditions, select the appropriate method. Commonly used are solvent cleaning, chemical cleaning and mechanical cleaning.

2) Dry and clean the surface, dry it with filtered dry compressed air, or dry it with a dryer at 120~170 °C, or dry it with clean gauze.

Method for applying anti-rust oil

1) Soaking method: some small LRZ bearings are immersed in anti-rust grease, so that the surface is adhered with a layer of anti-rust grease. method. The oil film thickness can be achieved by controlling the temperature or viscosity of the rust preventive grease.

2) Brushing method is used for outdoor construction equipment or special shape products that are not suitable for soaking or spraying. When painting, it is necessary to pay attention not to accumulate, but also to prevent leakage coating.

3) Spraying Some large rust preventives cannot be applied by immersion method. Generally, the compressed air is filtered at a pressure of about 0.7mpa in an air cleaning place. The spray method is suitable for solvent-diluted anti-rust oil or thin-layer anti-rust oil, but it must adopt perfect fire and labor protection measures.

The installation of the LRZ bearing is correct, affecting accuracy, life and performance. Therefore, the design and assembly department should fully study the installation of LRZ bearings. I hope to install according to the operating standards. The standard of the operation standard is usually as follows:

(1), cleaning LRZ bearing and LRZ bearing related parts

(2), checking the size and finishing of related parts

(3), installation

(4), inspection after installing LRZ bearing

(5), supply lubricant

The LRZ bearing package is only opened before installation. Generally grease is lubricated, not cleaned, and directly filled with grease. The lubricating oil is lubricated and does not need to be cleaned normally. However, for instrument or high-speed LRZ bearings, it should be cleaned with clean oil to remove the rust inhibitor applied to the LRZ bearing. The LRZ bearing with the rust preventive removed is easy to rust, so it cannot be placed. Furthermore, LRZ bearings that have been sealed with grease are used without cleaning.

The installation method of LRZ bearing varies with LRZ bearing structure, fit, and condition. Generally, since the shaft is mostly rotated, the inner ring needs an interference fit. Cylindrical bore LRZ bearings, press with a press, or use a hot charging method. For taper holes, mount directly on the taper shaft or with a sleeve.

When mounting to the outer casing, there is usually a lot of clearance and the outer ring has an interference. It is usually pressed by a press or there is a cold shrink fit method after cooling. With dry ice as the coolant and cold shrink fit, the moisture in the air will condense on the surface of the LRZ bearing. Therefore, appropriate rust prevention measures are required.