vacuum pump seal installation method
The seal of the vacuum pump plays an important role in the sealing function of the equipment. It can reduce the loss of vacuum and improve the efficiency of the equipment. Vacuum pump mechanical seal installation and use requirements, friends all know? Let's learn more about it with Xiaobian today!
1、 Requirements of mechanical seal on machine precision: (take mechanical seal of vacuum pump as an example)
(1) The radial runout of the shaft sleeve shall not exceed 0.060 mm.
(2) The axial displacement of the rotor shall not exceed 0.3mm.
(3) The maximum runout tolerance of the positioning end face of the seal cavity combined with the seal end cover to the surface of the shaft (or shaft sleeve) shall not exceed 0.04 ~ 0.06mm.
2、 Confirmation of seals:
(1) Confirm whether the installed seal is consistent with the required model.
(2) Before installation, carefully check with the general assembly drawing to see if the number of parts is complete.
(3) For mechanical seals with parallel coil spring transmission, the spring can be rotated left or right, which should be selected according to the rotation direction of the shaft.
3、 Installation method of seals:
The installation method varies with the type of mechanical seal and the type of machine, but the installation essentials are almost the same. The installation steps and precautions are as follows:
(1) Determination of installation size: during installation, the installation size of mechanical seal shall be ensured according to the product instructions or samples.
(2) Before installation, the shaft (sleeve) and gland should be free of burr, and the bearing should be in good condition; the seal, shaft, seal chamber and gland should be cleaned. In order to reduce the friction resistance, the shaft where the mechanical seal is installed should be coated with a thin layer of oil for lubrication. Considering the compatibility of rubber O-ring, if oil is not suitable, soapy water can be coated. Floating static ring without anti rotation pin structure, should not be oiled, should be dry into the gland.
(3) First, install the static ring and the gland on the shaft, and pay attention not to collide with the shaft, and then install the moving ring assembly. The set screw of spring seat or transmission seat shall be tightened evenly in several times.
Before fixing the gland, push the compensating ring by hand for axial compression. After loosening, the compensating ring can automatically spring back without clamping, and then lock the gland bolt evenly.
During the installation of vacuum pump seals, it is necessary to measure the size of the equipment, check whether the relevant parts are in good condition, and then carry out the installation work. During the installation, it should be installed according to the model of the equipment, and the accessories of the same model should be installed together.