language

News

News And Information

Home page

2023

The difference between piston seal and piston rod seal

The difference between piston seal and piston rod seal is: 1. The sealing object is different: the piston seal is the seal between the cylinder and the piston, and the piston rod seal refers to the seal between the piston rod and the cylinder head. 2. The consequences are different: poor piston sealing will affect the performance of the cylinder, and poor piston rod sealing will leak oil.

Author:

Piston Seals andPiston rod sealThe difference is:

1. The sealing object is different: the piston seal is the seal between the cylinder and the piston, and the piston rod seal refers to the seal between the piston rod and the cylinder head.

2. The consequences are different: poor piston sealing will affect the performance of the cylinder, and poor piston rod sealing will leak oil.

3. The position of the sealing groove is different: the sealing groove of the piston seal is opened on the piston, and the sealing groove of the piston rod seal is opened on the hole.

4. Use different sealing rings: the sealing ring of the piston seal is the sealing ring of the shaft, and the sealing ring of the piston rod seal is the sealing ring of the hole.

The hydraulic cylinder is composed of cylinder body, piston, piston rod, cylinder head and sealing ring.

Piston type hydraulic cylinder can be divided into single rod type and double rod type, the fixed way with cylinder fixed and piston rod fixed. According to the role of hydraulic, there are single-acting and double-acting.

In a single-acting hydraulic cylinder, pressure oil is only supplied to one chamber of the hydraulic cylinder, and the hydraulic cylinder moves in one direction, while the reverse movement is realized by external force (such as spring force, self-weight or external load). However, the movement of the piston of the double-acting hydraulic cylinder in both directions is accomplished by the action of alternating oil supply and hydraulic pressure of the two chambers.

What is the impact of improper use or operation of the 1. piston rod seal:

1. Improper selection of the supporting material of the cavity will wear the cavity and the piston rod.

2. The improper size of the friction pair will cause wear.

3. The improper thread lead angle of the cylinder barrel and the piston end will wear the sealing ring.

4. The improper installation guide angle of the seal will wear the seal ring.

5. The surface of the cavity and the piston rod is rough, and there are scratches and abrasion seals.

6. The external cylinder leaks and the jack cannot maintain pressure.

Precautions during transportation, installation or use of the 2. piston rod seal:

1. The wrong installation direction of the seal will cause leakage.

2. During installation, there is foreign matter in the mixed cargo pipeline, and dust enters the sealed cavity to cause leakage.

3. The seal is damaged due to poor assembly, resulting in leakage.

4. Scratches on the surface of the sealing rod will cause leakage.

5. The piston rod is not concentric, and the variable load causes leakage.

Key words:

Piston rod seal