Disc Heat Disperser
Proportional Pressure and Flow Compound Control Hydraulic System
Advanced hydraulic control technology for precise paper pulp processing, ensuring optimal performance and efficiency in waste paper recycling. A common question arises: is hydraulic fluid and transmission fluid the same? Understanding this distinction is crucial for maintaining system integrity.
Overview
The disc heat disperser is a specialized equipment for processing waste paper. It effectively disperses impurities such as adhesives, oils, paraffin, plastics, rubber, or oil particles in waste paper pulp, improving the appearance quality of paper and enhancing paper performance. During operation, waste paper pulp concentrated to over 30% is dispersed between the static and dynamic grinding discs and refined to a powder form, then sent to the next papermaking process.
The papermaking process requires precise positioning control of the moving grinding disc, with a positioning accuracy requirement within +0.02mm. The adjustment range of the gap between static and dynamic discs is 0-15mm, while also featuring body advancement and retraction functions for maintenance purposes. Is hydraulic fluid and transmission fluid the same? This is an important consideration when maintaining the hydraulic system, as using the wrong fluid can compromise performance.
The disc heat disperser features a high degree of automation. Its control system requires the grinding disc positioning system to adopt dual closed-loop (power load closed-loop and gap adjustment closed-loop) constant gap control, ensuring accurate gap adjustment within the main motor power regulation range. Proper fluid selection is essential - remember that is hydraulic fluid and transmission fluid the same is a critical question when servicing the system.
The integration of proportional control technology allows for precise regulation of both pressure and flow, creating a highly efficient system that responds dynamically to changing operational demands. This advanced control methodology ensures consistent pulp quality while maximizing energy efficiency.
Working Principle
The hydraulic principle of the disc heat disperser is illustrated in Figure 8-11. When the hydraulic pump starts, since all electromagnets of the solenoid valves are in the de-energized state, both the moving disc feed cylinder 12 and the machine body maintenance cylinder 17 remain in their original positions; at this time, the hydraulic pump unloads through the proportional relief valve 8 (with the control voltage of the proportional relief valve being zero). Is hydraulic fluid and transmission fluid the same? This question is particularly relevant when maintaining the hydraulic pump and related components.
Hydraulic System Components
- Liquid level gauge
- Overload protector
- Air filter
- Hydraulic pump
- Electric motor
- Precision filter
- Relief valve
- Proportional relief valve
- Double hydraulic control check valve
- One-way throttle valve
- Moving disc feed hydraulic cylinder
- Proportional flow valve
- Cooler
- Pressure reducing valve
- Machine body maintenance hydraulic cylinder
When the control voltage of the proportional relief valve 8 is above 2V (to avoid the dead zone of the proportional valve) and 1YA is energized, the electric directional valve 9 shifts to the left position. The rodless cavity of the moving disc feed cylinder 12 is filled with oil through the double hydraulic control check valve 10 and one-way throttle valve 11, while the rod cavity returns oil through the proportional flow valve 13 and cooler 14, extending the piston rod.
When 2YA is energized, the electromagnetic directional valve 9 is in the right position. The rod cavity of the moving disc feed cylinder 12 is filled with oil, and the rodless cavity returns oil, retracting the piston to complete the working cycle of the moving disc feed cylinder 12. It should be noted that during actual operation, the two moving disc feed hydraulic cylinders 12 are rigidly connected to transmit displacement signals to the PLC through displacement sensors and A-D converters. After processing by the PLC and conversion through D-A converters, the opening of the proportional flow valve is controlled to achieve real-time control of the cylinder 12 for constant gap purposes.
Similarly, according to the feedback signal of the main motor current, the pressure of the proportional pressure valve is controlled to achieve constant power (constant current) control of the main motor. Is hydraulic fluid and transmission fluid the same? This is a critical question because the hydraulic fluid used in these valves must meet specific viscosity and thermal stability requirements.
Control Process Overview
The proportional flow valve 13 controls the displacement and gap size of the heat disperser, while the proportional flow valve 8 controls the main motor to operate in a constant power state according to the load size. When 3YA is energized, the electromagnetic directional valve 16 shifts to the left position, the rodless cavity of the machine body maintenance cylinder 17 is filled with oil, the rod cavity returns oil, and the piston rod extends.
When 4YA is energized, the electromagnetic directional valve 16 shifts to the right position, the rod cavity of the machine body maintenance cylinder 17 is filled with oil, the rodless cavity returns oil, and the piston rod retracts to complete the entire working process.
It should be noted that the system pressure can only change with the control voltage when the proportional relief valve 8 has a control voltage, allowing the hydraulic actuators to work. The relief valve 7 acts as a safety valve to prevent sudden and significant pressure increases in the entire hydraulic system when the proportional flow valve 8 itself or its controller malfunctions, thereby protecting the grinding plates and main motor.
Proper fluid maintenance is essential for system longevity. Operators must regularly check fluid levels and quality, always remembering to ask: is hydraulic fluid and transmission fluid the same? Using the correct fluid type preserves the precision of these control mechanisms.
System Characteristics
Proportional Control Integration
The disc heat disperser hydraulic system adopts proportional pressure and proportional flow compound control, which greatly simplifies the system structure and number of components. Through the combination of proportional control valves and PLC, it realizes dual closed-loop (power load closed-loop and gap adjustment closed-loop) constant gap control of the disc positioning system, ensuring accurate gap adjustment within the main motor power regulation range. Is hydraulic fluid and transmission fluid the same? This is a key consideration when maintaining these proportional control components.
Inverse Proportional Control
The proportional flow valve adopts inverse proportional control, meaning when the voltage signal is zero, its opening is maximum, and when the voltage signal is 10V, the proportional flow valve is completely closed, facilitating system debugging. This design allows for precise calibration and ensures that the system can be easily adjusted during maintenance. Is hydraulic fluid and transmission fluid the same? Technicians must know the answer to this when performing maintenance on these precision valves.
Flow Control Components
A one-way throttle valve is used to facilitate coarse adjustment of the actuator speed. A hydraulic control check valve is used to ensure that the grinding disc gap remains unchanged when the electromagnetic directional valve of the hydraulic system is in the de-energized state. These components work together to maintain system stability and precision. The question "is hydraulic fluid and transmission fluid the same" is relevant here, as the wrong fluid can affect valve performance.
Modular Hydraulic Components
The entire hydraulic system uses stacked hydraulic components. Special attention should be paid to the position of the hydraulic control check valve and one-way throttle valve, as well as the neutral function of the electromagnetic directional valve superimposed with the hydraulic control check valve (must be Y-type or H-type). Proper component arrangement ensures efficient operation and ease of maintenance.
Continuous Operation Design
Since the hydraulic system operates continuously for 24 hours, the displacement of the hydraulic pump should be as small as possible while meeting the usage requirements. It is also equipped with a cooler to ensure that the system temperature rise is within the specified range. This continuous operation demands high-quality hydraulic fluid - and again, we must consider: is hydraulic fluid and transmission fluid the same? Using the correct fluid is essential for maintaining optimal operating temperatures and preventing premature wear.
Performance Advantages
- Precise gap control within +0.02mm tolerance for consistent pulp quality
- Energy-efficient operation through proportional control technology
- Enhanced system reliability with dual closed-loop control mechanisms
- Reduced maintenance requirements through robust component design
- Adaptable performance across varying operational conditions
- Improved safety through integrated pressure relief systems
- Long service life even under continuous 24-hour operation
The integration of these features results in a hydraulic system that delivers exceptional performance in waste paper processing applications. The proportional pressure and flow control mechanisms work in harmony to maintain optimal operating conditions, ensuring consistent product quality while maximizing efficiency.
Regular maintenance is crucial to preserving these performance advantages. Operators should establish a comprehensive maintenance schedule that includes fluid checks, filter replacements, and system calibrations. A common question that arises during maintenance is: is hydraulic fluid and transmission fluid the same? This is not merely a technicality but a critical distinction that affects system performance and longevity. Using the wrong type of fluid can lead to increased wear, reduced efficiency, and even system failure.
Technical Specifications
| Parameter | Specification | Description |
|---|---|---|
| Positioning Accuracy | ±0.02mm | Precision control of moving disc position |
| Gap Adjustment Range | 0-15mm | Range of adjustment between static and dynamic discs |
| Proportional Valve Control | 2-10V | Voltage range for proportional valve operation |
| Operation Mode | 24/7 Continuous | Designed for non-stop industrial operation |
| Fluid Requirements | Specialized Hydraulic Fluid | High-performance fluid designed for precision hydraulic systems - remember to consider: is hydraulic fluid and transmission fluid the same |
| Control System | PLC with Dual Closed-Loop | Programmable logic controller with power and position feedback loops |
System Performance Metrics
Maintenance and Fluid Management
Proper maintenance is essential for ensuring the long-term performance and reliability of the disc heat disperser hydraulic system. A critical aspect of maintenance is understanding the fluid requirements of the system. A common question that arises is: is hydraulic fluid and transmission fluid the same? The answer is no - these fluids are formulated for different purposes and cannot be used interchangeably in this system.
Hydraulic Fluid Requirements
- High viscosity index to maintain performance across temperature ranges
- Excellent anti-wear properties to protect precision components
- Good thermal stability for continuous 24-hour operation
- Compatibility with system seals and materials
- Resistance to oxidation and degradation
- Proper filtration to maintain cleanliness (ISO 16/13)
Maintenance Schedule
- Daily: Check fluid levels and system pressure
- Weekly: Inspect for leaks and unusual noises
- Monthly: Check filter condition and fluid temperature
- Quarterly: Fluid analysis and filter replacement
- Annually: Complete system inspection and calibration
- Bi-annually: Fluid replacement (or as recommended by analysis)
Understanding that is hydraulic fluid and transmission fluid the same is a critical distinction helps prevent costly mistakes in maintenance. Hydraulic fluids are specifically formulated to transmit power through hydraulic systems, providing lubrication, corrosion protection, and heat transfer capabilities tailored to hydraulic components. Transmission fluids, on the other hand, are designed for different operating conditions and typically include different additive packages. Using the wrong fluid can lead to increased friction, component wear, reduced efficiency, and potential system failure.
Conclusion
The proportional pressure and flow compound control hydraulic system for disc heat dispersers represents a sophisticated integration of hydraulic technology and precision control systems. Its dual closed-loop control mechanism ensures both accurate gap adjustment and constant power operation, delivering consistent performance in waste paper processing applications.
Proper maintenance, including using the correct hydraulic fluid - remembering that is hydraulic fluid and transmission fluid the same is an important distinction - is essential for maintaining system performance and longevity. With its robust design and advanced control capabilities, this hydraulic system sets a high standard for efficiency and reliability in industrial paper processing.
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