Application Overview: Demolition & Concrete Material Processing
Demolition working conditions are extremely harsh for excavator attachments. Rotary pulverizers are widely used in primary demolition and secondary concrete recycling projects. The equipment can crush reinforced concrete structures, separate steel rebar, and break large bulk materials into small pieces for convenient transportation.
Rotary pulverizers matched for 15–45 ton excavators rely on two core hydraulic drive systems to achieve stable and efficient operation:
360° Unlimited Continuous Rotation
Operators can adjust the crushing jaw to any angle aiming at concrete columns, walls and floor slabs without moving the whole excavator, greatly improving construction flexibility.
High-pressure Jaw Closing System
Output stable and powerful crushing force to break high-strength concrete and cut built-in steel rebar at the same time.
WEITAI supplies integrated hydraulic kits specially customized for rotary pulverizer OEM manufacturers and accessory repair factories. Matching our CPR Series Hydraulic Rotators with customized heavy-duty double-acting hydraulic cylinders, our products feature high power density, strong anti-pressure impact performance, and zero position drift under strong vibration.
System Matching Structure of Hydraulic Kits
The rotary pulverizer operates relying on coordinated hydraulic power. The upper rotary device adjusts the angle of the working head, while the main hydraulic cylinder pushes the movable jaw to squeeze against the fixed tooth plate for crushing work.
| Component | Core Function | Design Highlights |
|---|---|---|
| CPR Series Hydraulic Rotator | 360° arbitrary angle positioning | Small radial installation size, large output torque, integrated rotary valve manifold |
| Double-Acting Hydraulic Cylinder | Jaw opening & high-intensity crushing | Max working pressure up to 380 bar, impact load absorption structure, strong anti-bending performance of piston rod |
1 Heavy-Duty Double-Acting Hydraulic Cylinders
The hydraulic cylinder is the core force component of the pulverizer. It needs to bear instantaneous pressure surges when the jaw contacts reinforced concrete or hard gravel, as well as large lateral loads caused by eccentric crushing.
Technical Parameters
- Barrel Diameter: 125 mm ~ 260 mm
- Piston Rod Diameter: 70 mm ~ 180 mm
- Stroke: 215 mm ~ 650 mm
- Working Pressure: 250 bar ~ 380 bar (3,625 psi ~ 5,510 psi)
- Structure: Double-acting type, customizable installation connectors
Structural Advantages & Industrial Design
1. High-strength seamless steel cylinder barrel
Adopt thick-wall precision honed seamless steel pipe, the inner wall achieves ultra-precise finish, effectively reduce seal wear, and avoid cylinder expansion under instantaneous 380 bar high pressure.
2. Induction hardening chrome-plated piston rod
Made of high-tensile steel, after induction hardening treatment + hard chrome plating, it resists impact of hard objects, abrasion of concrete dust, and bending deformation during eccentric crushing.
3. Multi-stage heavy-duty sealing assembly
Equipped with polyurethane + PTFE combined sealing set, matched with anti-extrusion wear-resistant rings. Stable sealing performance under rapid pressure fluctuation, high oil temperature and mixed particle pollution.
4. Optional built-in hydraulic buffer
Buffer structure at both ends of stroke slows down piston movement when reaching the limit, reduce rigid impact on pulverizer frame, extend service life of pin shaft and bushing.
2 CPR Series Hydraulic Rotators
Urban narrow construction sites and high-altitude demolition operations require flexible angle adjustment of pulverizers. WEITAI CPR hydraulic rotator supports smooth 360° continuous rotation with reliable holding torque.
Technical Parameters
- Rotation Range: Unlimited 360° continuous rotation
- Output Torque (25 MPa): 1,000 N·m ~ 3,100 N·m
- Internal Oil Circuit: Integrated high-pressure rotary manifold for cylinder oil supply
- Installation Forms: Flange connection, pin connection, customized upper/lower connection interfaces
Structural Advantages & Industrial Design
1. High torque-weight ratio
Compact outer diameter design shortens the suspension length of the pulverizer, keep excavator stability and digging force.
2. Heavy-duty slewing bearing
Bear large axial force, radial force and overturning moment brought by the weight of crushing jaw and concrete shear reaction force.
3. Zero internal leakage hydraulic structure
Keep the jaw fixed at the set angle without drifting when the control valve is neutral, easy for operators to complete complex demolition work.
4. Integrated rotary joint
Internal oil pipeline layout avoids external hose winding and scratch damage from construction waste.
Solve Core Design Pain Points for Pulverizer OEM Manufacturers
Pulverizer manufacturers often face various hydraulic and mechanical design problems, WEITAI hydraulic parts are developed to solve these troubles fundamentally:
1. Resist instantaneous high pressure surge
When the crushing jaw clamps steel bars or hard impurities, pipeline pressure will instantly exceed the standard working pressure. Our cylinders adopt thickened cylinder barrel and reinforced gland nuts to prevent thread deformation and internal oil leakage under sudden pressure impact.
2. Bear lateral load & prevent piston rod bending
Eccentric crushing will produce huge lateral pressure on piston rod and guide bearing. Our cylinders are equipped with lengthened guide bushings and wide wear-resistant strips to disperse lateral pressure, avoid surface scratch and seal damage.
3. Anti-dust & anti-pollution for harsh construction environment
Concrete dust, silica sand and moisture will quickly damage ordinary dust-proof seals. Our cylinders and rotators are equipped with metal shell heavy-duty dust wiper and hard dust-proof seals to protect internal components in long-term demolition work.
OEM & ODM Customization Service
We know each accessory manufacturer has exclusive frame structure, pin spacing and hydraulic pipeline layout. WEITAI provides full-process technical support to customize rotators and cylinders matching your equipment parameters.
Customizable Items
Oil port & valve accessories
SAE / BSPP / metric standard oil ports; integrated holding valve, balance valve, pressure relief valve block optional.
Installation connection structure
Custom spherical bearing, earring support, cross pin hole, flange connecting ring matching your frame size.
Rotator personalized modification
Custom bolt hole circle, high torque gear set, adjustable flow to realize faster rotation response.
Surface coating & color customization
Heavy-duty wear-resistant polyurethane paint, zinc plating, or customized color matching your brand style.
Strict Quality Control & Stable Supply Chain
- ✓ ISO certified production system, standardized whole-process manufacturing
- ✓ 100% offline pressure test: static pressure resistance test + dynamic internal leakage test for every cylinder and rotator before delivery
- ✓ Complete material traceability: provide steel mill test certificates for cylinder barrel, piston rod and all forged structural parts
- ✓ Short delivery cycle: conventional hot-selling models only need 7–15 days production lead time
- ✓ After-sales guarantee: all products enjoy 1-year factory warranty
How to Get Quotation & Technical Drawings
If you need official quotation, 2D/3D CAD drawings or customized design scheme for your rotary pulverizer project, please send the following equipment parameters to our engineering team:
- 1 Matched excavator tonnage (such as 20t, 30t)
- 2 Crushing performance requirements: jaw opening range, target crushing force, jaw moving speed
- 3 Excavator hydraulic parameters: available flow rate (L/min), system relief pressure (bar/psi)
- 4 Installation dimension standard: pin shaft diameter, pin center distance, flange size
Contact WEITAI Hydraulic now, our professional technical team will provide exclusive customized hydraulic cylinder and CPR series rotator solutions for your excavator attachment products.