Analysis of 1. Technology Architecture: Design Logic of All-category Electric Control hoist

The electronic control hoist of Zhengzhou Rongjing Mechanical Equipment Co., Ltd. adopts the modular design concept. The core power system integrates frequency conversion motor and planetary reducer, and realizes precise adjustment of tension and speed through PLC control system. Taking the JMM-5T electric control hoist as an example, its rated pulling force reaches 5 tons, the diameter of the steel wire rope is 12mm, and the response time of the brake is less than or equal to 0.2 seconds, which is suitable for vertical hoisting scenes in construction. The technical team improved the transmission efficiency to 92% by optimizing the gear meshing coefficient (modulus 3.5mm, number of teeth 20-30), reducing energy consumption by 15% compared with traditional models.

2. Multi-Industry Adaptability: Scenario Customization from Mine to Ship

In the mining scene, the company for a large mining enterprises customized JMM-20T explosion-proof electric hoist, IP65 protection level and double brake system, can be -30 ℃ to 50 ℃ extreme environment stable operation. Its wire rope breaking force reaches 200kN, and it is matched with frequency conversion speed regulation function (0-15 m/min stepless speed change) to meet the requirements of underground equipment hoisting and material transportation. In the field of ship docks, JMM-3T vertical circulating winch is suitable for deck operation with limited space through compact design (the height of the whole machine is 1.2m), and its double drum structure realizes continuous operation efficiency improvement of 40%.

3. customized service process: a four-step approach from requirement analysis to solution landing

STEP1: Condition evaluation. The technical team determines the installation space (e. g. mine roadway width ≥ 2.5m), load type (dynamic/static) and environmental parameters (humidity, dust concentration) through site survey. STEP2: Scheme design. Taking a water conservancy project as an example, a dual-motor synchronous drive scheme is designed for the concrete pouring scene of the dam, and the synchronous error of the two hoisting machines is less than or equal to 5mm through encoder feedback. STEP3: Manufacturing. Using Q345B high strength steel plate welding frame, after 100% ultrasonic flaw detection, to ensure that the structural strength standards. STEP4: Commissioning delivery. No-load, full-load and overload tests (110% of rated load) were conducted at the customer site, and 12 key parameters such as braking distance and motor temperature rise were recorded.

4. Performance Verification Case: Continuous Operation Test of a Construction Site

In a six-month high-rise building project, three JMM-10T electric winches have been running for more than 2000 hours without brake failure or motor overheating. The measured data show that the no-load starting time is 0.8 seconds, the full-load braking distance is less than or equal to 0.5m, and the wire rope wear rate is 30% lower than the industry average. Feedback from the project leader: "The frequency conversion and speed regulation function of Rongjing winch improves the hoisting accuracy to ± 10mm, significantly reducing the secondary adjustment time."

5. Technology FAQ: Common Problems and Solutions

Q1: How does an electrically controlled winch achieve overload protection?
A: through the current transformer real-time monitoring of the motor current, when the load exceeds the rated value of 110, PLC control system automatically cut off the power supply, while triggering sound and light alarm.

Q2: How long does the customized service cycle take?
A: The delivery cycle of standard models is 15 days, while that of non-standard customized models is 30-45 days according to complexity, including the whole process of scheme design, parts processing and whole machine testing.

Q3: What are the key points of equipment maintenance?
A: It is recommended to check the thickness of the brake friction plate every 500 hours (the remaining thickness is ≥ 3mm and needs to be replaced), replace the gear oil (model: Mobil SHC 634) every 1000 hours, and regularly clean the dust of the motor cooling fan.