Vacuum pump refers to the device or equipment that uses mechanical, physical, chemical or physicochemical methods to extract air from the container to obtain vacuum. Generally speaking, vacuum pump is a device to improve, generate and maintain vacuum in a certain closed space by various methods. Check that the vacuum breaking door is closed without leakage.

Check that the steam side drain valve of the condenser is closed and there is no leakage. Check that the water level gauge of the vacuum system is not cracked or leaked. Check that the exhaust safety valve of low pressure cylinder is complete without air suction. Check whether there is air leakage at the connection between the extraction pipe and the cylinder in the vacuum state. The vacuum drops when the load decreases and the vacuum rises slightly after the load increases. Check whether the water level of the low-pressure heater under negative pressure is normal and whether the drain door is tight. Check whether the gravity return water of the speed regulating feed pump is led into the condenser. If the return water volume is small and the water seal bag cannot be sealed, the gravity return water of the feed water pump sealing water should be poured into the trench. Check whether the water seal, pipe, flange or welding joint of vacuum system valve is not tight, especially the pipeline and valve from expansion tank or boiler starting separator to condenser.

1、 Corrosion protection method of water ring vacuum pump:

Surface treatment: thoroughly remove the surface oxide layer and clean the surface with acetone.

Coating material: apply a thin layer of material to ensure bonding and complete coverage, and then evenly apply the material to the repair surface to reach the required repair thickness.

Blending materials: strictly in accordance with the proportion of blending, and stirring evenly, until there is no color difference.

Installation and precautions: install according to the assembly requirements, repair and protect the material should avoid being knocked or impacted by external force, if the material affects the assembly, it can be treated by grinding method, never knock, to avoid damage to other materials.

2、 Boring process of vacuum pump

The key point of vacuum pump body processing technology is to ensure the correct position of assembly reference hole surface and water chamber flow channel, and the use of boring machine for pump body is the core measure in processing.

The process route of vacuum pump boring machine is as follows:

1. After aligning the runner with the foot surface, clamp the inlet and outlet flanges separately to ensure that the flanges are parallel and coincide with the center of the flow channel;

2. The water inlet flange is placed on the worktable to align the flow channel, and then the hole surface of the impeller assembly end is aligned. After the workbench is rotated 180 degrees, the underfoot surface is locked to ensure the position accuracy of the assembly hole surface and the flow channel;

3. Complete other processes according to the drawing.

According to market information, most of the quality problems are related to poor manufacturing, so the importance of technology can not be ignored. In the production process of vacuum pump, no matter which structure it is, the processing technology should be focused on.