Precision Servo Control + Automatic Metering + Long-Distance Stable Cable Handling
Customized solution for Sinohydro Bureau of China Foundation Engineering Co., Ltd.
This system is designed for underground measurement applications at hydropower stations, primarily used for deploying and retrieving measuring weights, with precise long-distance wire rope control.
Unlike standard winches, this project demanded more than just "pulling power." The requirements included:
Long-distance stable cable handling
Precise metering feedback
Automatic rope guiding
PLC automatic control integration
Long-term operational stability in wet, slurry-prone environments
To meet these challenges, KLD delivered a solution featuring:
Industrial-grade servo drive system
Integrated waterproof metering encoder
Screw-type automatic rope guide mechanism
PLC-based automatic control logic
Compact drum design
This forms a complete measurement control winch system.
Why Standard Winches Struggle with Hydropower Measurement Applications
In hydropower station measurement environments, equipment typically requires:
Long-distance cable deployment
Precise length recording
Automatic cyclic operation
Long-term repeatable performance
Standard winches in these conditions commonly experience the following issues:
① Rope Tangling After Long-Distance Operation
Standard winches lack a proper rope guiding system. After extended cable travel, the wire rope is prone to:
Coil stacking
Overlapping
Jamming
Localized abrasion
In severe cases, this can affect measurement accuracy.
② Inability to Precisely Record Deployment Depth
Traditional winches can only perform basic deployment and retrieval. They cannot accurately record:
Actual cable payout length
Current operational position
Repeatable deployment depth
For measurement systems, this directly impacts data quality and reliability.
③ Insufficient Automation Control Capability
Standard winches typically offer only:
Forward rotation
Reverse rotation
Stop
However, modern measurement systems require:
Automatic operation
Automatic start/stop
Automatic metering
Automatic cycle control
Data feedback integration
This falls squarely within the realm of automated control systems.
④ Stability Challenges in Wet, Slurry-Prone Environments
Underground environments are characterized by:
High humidity
Slurry and mud
Water vapor
Dust and particulates
Standard motors and sensors in these conditions often suffer from:
Encoder failure
Connector malfunctions
Data inaccuracies
Control anomalies
KLD Servo Measurement Control Solution
For this project, KLD did not follow traditional winch design logic. Instead, the system was redesigned as an automated measurement control system.
The core components include:
1. Industrial-Grade Servo Drive System
This project employs an industrial-grade servo motor control solution.
Advantages of the servo system compared to conventional motors:
Precise speed control
More stable low-speed operation
Faster start/stop response
Higher repeatable positioning accuracy
Better suited for automated systems
During measurement equipment deployment, the system delivers:
Smooth operation
Precise stopping
Reduced impact and swing
This significantly improves overall measurement stability.
2. Integrated Waterproof Metering Encoder
The system includes:
Industrial-grade metering encoder
Waterproof housing design
It provides real-time recording of:
Cable payout length
Cable retrieval length
Current operational status
Data is fed to the PLC system for automatic control. This encoder is a core component of the entire measurement system.
3. Screw-Type Automatic Rope Guide System
This project uses a reciprocating screw-type rope guide mechanism that automatically arranges the wire rope in an orderly pattern.
Compared to standard rope guides, this system effectively reduces:
Rope tangling
Jamming
Localized rope compression
Wire rope abrasion
It is particularly well-suited for:
Long-distance cable deployment and retrieval
High-frequency cyclic operation
Automated measurement systems
4. PLC-Based Automatic Control Logic
The system uses a PLC automatic control architecture to achieve:
Automatic start/stop
Automatic deployment and retrieval
Automatic metering
Data feedback
Automated operational logic
System control flow:
PLC Control System → Servo Drive → Winch Operation → Encoder Length Feedback → Automatic Recording & Control
Compared to traditional winches, this represents a complete industrial automation actuation system.
Project Reference Parameters
The main configuration for this project is as follows:
| Parameter | Value |
| Lifting Capacity | ≤100 kg |
| Wire Rope Specification | 4 mm × 230 m |
| Operating Speed | 20 m/min |
| Control System | Servo Drive + PLC |
| Rope Guide Structure | Screw-type automatic guide |
| Encoder | Waterproof metering encoder |
| Operating Environment | Hydropower station underground, slurry conditions |
| Wire Rope Material | Stainless steel |
| Design Feature | Compact drum design |
Note: The above parameters are based on an actual project configuration. Solutions can be redesigned according to specific operating conditions.
What This Solution Ultimately Achieved
Through KLD's customized design, the system delivers:
✔ Long-Distance Stable Cable Handling
Stable operation over 230 meters of cable.
✔ Precise Metering Feedback
Real-time recording of deployment depth.
✔ Automatic Rope Guiding
Eliminates tangling and jamming during long-term operation.
✔ Automated Operation
Meets PLC integration and automatic control requirements.
✔ Complex Environment Adaptability
Suitable for humidity, slurry, and water vapor conditions.
✔ Compact Design
Fits within confined wellhead installation spaces.
KLD: More Than a Winch Manufacturer
We Provide Engineering Control Solutions
For non-standard measurement system projects, the critical factors are not limited to the winch itself, but include:
Control logic design
Long-cable operational stability
Automatic rope guiding capability
Automation system integration
Environmental adaptability
Long-term operational reliability
KLD offers:
Non-standard structural design
PLC control solutions
Automatic metering systems
Automatic rope guide structures
Servo control systems
Engineering support
From application analysis and solution design through drawings, assembly, testing, and project delivery, we provide complete engineering support.
Non-Standard Measurement Systems
Cannot Be Directly Matched to Standard Models
If you have a similar application, please provide the following information:
Wire rope diameter
Wire rope length
Required pulling capacity
Operating speed
Operating environment
Automation control requirements
Available installation space
KLD can provide:
✅ Free solution design
✅ Engineering structure recommendations
✅ PLC control suggestions
✅ Automatic metering solutions
✅ Automatic rope guide solutions
✅ Non-standard winch system customization
FAQ – Hydropower Station Servo Winch System
Q1: With 230 meters of cable, will tangling really be prevented?
A: Yes. The system uses a screw-type automatic rope guide mechanism, not a standard rope guide. The reciprocating screw structure ensures the wire rope is wound in neat, orderly layers, preventing stacking and jamming even during long-distance operation. This has been validated on the 230-meter cable in this project.
Q2: Will the encoder hold up in underground slurry conditions?
A: Yes. We use an integrated waterproof metering encoder specifically designed for wet, slurry, and water vapor environments. Standard encoders do commonly fail in these conditions, which is why a waterproof design was specified from the outset.
Q3: What level of control accuracy can be achieved?
A: The combination of servo drive, PLC, and encoder feedback delivers industrial automation-grade performance. Speed control, start/stop response, and repeatable positioning accuracy are significantly better than conventional motor systems. Specific accuracy can be tailored to your application requirements.
Q4: Can the system integrate with an existing PLC?
A: Yes. Our control system is designed specifically for PLC integration, enabling automatic start/stop, deployment/retrieval, metering, and data feedback. Interface matching can be provided for existing control systems.
Q5: What if installation space is limited?
A: This project used a compact drum design specifically to accommodate confined wellhead spaces. If your installation space is restricted, we can match the design to your actual dimensions at the engineering stage.
