The specific application of the crusher seal

The sealing system of the breaker (hydraulic crusher) is of vital importance to its performance, lifespan and safety. The specific application of the sealing components involves multiple key areas. Here is a detailed classification and description of the application scenarios:

1. Sealing between the piston and the cylinder

Application location: The piston performs high-frequency reciprocating motion within the cylinder.

Sealing type: Typically uses a combination of polyurethane (PU) or rubber materials.

Function:

- Prevents hydraulic oil leakage, ensuring efficient pressure transmission.

- Blocks external dust and moisture from entering the hydraulic system, reducing wear.

Failure impact: Internal leakage leads to a decrease in impact force, increased oil temperature, and even piston jamming.

 2. Accumulator Sealing

Application Location: The connection point between the accumulator and the main body of the hammer crusher.

Function:

- Maintaining the nitrogen pressure inside the accumulator and buffering shock and vibration.

- Preventing the mixture of hydraulic oil and nitrogen.

Failure Impact: Reduced energy absorption efficiency and unstable hammering force.

 3. Directional Control Valve and Oil Circuit Sealing

Application Location: Interface of the directional control valve for controlling the flow of oil.

Sealing Types: O-ring, end face seal, or custom sealing ring.

Function:

- Ensure that the high-pressure oil accurately drives the piston to move.

- Prevent valve core jamming, which could cause delayed movement.

Failure Impact: Abnormal operation of the breaker hammer (such as consecutive strikes, failure to return to position).

 4. Plug Rod (Tool Rod) Sealing Sleeve

Application Location: The contact area between the plug rod and the housing.

Sealing Type: Dust seal (such as TC frame oil seal) + Wear-resistant guide ring.

Function:

- Prevent debris and mud from entering and damaging the piston.

- Retain lubricating oil and reduce friction of the plug rod.

Failure Impact: Plug rod wear, piston damage, oil leakage and environmental pollution.

 5. Shell Joint and Bolt Sealing

Application Location: Junctions of upper and lower shells, bolt holes.

Sealing Type: Aged-acrylic (threaded seal), rubber gasket.

Function:

- Prevent external water and mud from seeping into the interior of the shell.

- Reduce the loosening of bolts caused by vibration.

Failure Impact: Rusting of internal components, cracking of structural parts.

 6. High-pressure hose joint seal

Application location: Interface between hydraulic hose and breaker hammer.

Sealing type: Conical thread seal (such as NPT), flat sealing ring.

Function:

- Ensure no leakage of high-pressure oil (working pressure can reach 20-35 MPa).

- Resist loosening of the joint caused by pulse vibration.

Failure impact: Loss of hydraulic system pressure, contamination of oil.

Sealing Requirements under Special Conditions

Underwater Operations: Require double sealing (such as mechanical seal + lip seal) for waterproofing.

Extremely Cold Environments: Use materials resistant to low temperatures (such as fluorosilicone).

High Dust Environments: Enhance the design of the dust seal, such as labyrinth seal.

Maintenance Points

Regular Inspection: Replace the seals promptly when they become worn, hardened, or cracked.

Cleaning and Lubrication: Remove impurities around the drill rod and keep the guide sleeve lubricated.

Correct Installation: Avoid twisting or scratching the seals (use specialized tools for installing Stroff seals).

By selectively choosing the sealing solutions, the reliability and service life of the impactor can be significantly enhanced in harsh working conditions such as building demolition and mining operations.