Alloy steel ZYB slag pump mechanical seal which is good? Pre

Alloy steel ZYB slag pump mechanical seal which is good?

What are the cautions?

What are the reasons for the mechanical seal "O" ring crack?

A: the surface of the shaft is rough or burr;

The old shaft or shaft sleeve is jammed by the fastening screw and is not polished and smooth before assembly;

Edge of keyway and turnpin slot not properly trimmed.

What are the requirements for the compression of mechanical seal spring?

Answer: mechanical seal spring bai drive screw compression a quantity, called the compression of the spring.

Mechanical seals are all installed, relative to the spring and a amount of compression, this amount is called the mechanical seal compression.

The total compression of the mechanical seal spring is the sum of the compression of the driving screw and the spring itself.

In the assembly, the greater the compression of the mechanical seal, the smaller the force of the spring on the moving ring.

Therefore, the working principle of mechanical seal, the size of the spring on the performance of mechanical seal and life has a great impact, so the assembly must be adjusted according to the technical requirements of the compression.

What should I pay attention to when installing the stationary ring assembly?

Answer: 1) insert the checked static ring sealing ring from the tail of the static ring, and put the static ring assembly into the gland or sealing cavity.

Under no circumstances shall impact parts or components of mechanical seals be applied.

The pressed surface should be padded with clean cardboard or cloth to avoid damage to the sealing end face.

2) After assembling into rotating movable ring assembly or static static ring assembly, press the compensation ring by hand to check whether it is installed in place and flexible;

Whether the location of elastic opening is reliable.

3) whether the verticality between the sealing end face and the center line of the shaft or shaft sleeve meets the requirements.

4) For static mechanical seals, the anti-rotary pin lead of the static ring assembly should be accurate. When promoting the static ring group, the pin groove of the component should be aligned with the pin. After pushing in place, the distance between the end face of the component and a certain end face of the sealing chamber should be measured to determine whether the installation is in place;

5) when tightening the end cover with bolts, the force should be uniform and symmetrical. After several times, it can not be tightened at a time to avoid deflection or even crush the stone ink ring.

What are the requirements for the inspection of mechanical seals after assembly?

A: After the mechanical seal is assembled, it should be inspected twice.

1) turn car inspection.

Because there is no liquid filling, there is only a small amount of lubricating oil on the end face of the static and static ring seal, so it is not suitable for many plates to avoid damage to the end face of the seal.

2) Check filling liquid.

Check whether there is leakage. If there is no leakage, test run inspection can be done.

What is the inspection standard for the leakage point of the dynamic seal?

A: 1) the packing sealing point should not be more than 15 drops per minute;

2) The mechanical seal point is not allowed to leak at the initial stage, and no more than 15 drops per minute at the end;

3) The gear oil pump is allowed to leak slightly, no more than 1 drop per minute;

4) All kinds of oiler allow micro leakage, no more than 1 drop per minute.