This system is used to research and evaluate the durability performance and service life of floating oil seals. A pair of floating oil seal assemblies shall be mounted into the floating seal sand box of HRJ testing machine in standard assembly state. Multiple mixed media including mortar, slurry, clay and water are filled into the box. One end is driven for rotary motion while axial load is applied on the other end, with continuous operation lasting 1000 h to 2000 h. After the test, the erosion, corrosion, abrasion and aging degree on the sealing face of floating sealing rings and O-rings of the floating seal pair under long-term abrasive medium wear conditions shall be inspected and assessed.
→Adopt a fully enclosed high-strength sand box with precision machining, which prevents leakage of oil, gas, water, dust, mud, saline-alkali liquid, quartz sand, coarse sand, fine sand, clay particles and other substances inside the floating seal cavity during high-speed rotation test of the floating seal pair. Real-time measurement and display of temperature variation are supported.
→Complete the enhanced dynamic sealing performance test for floating oil seal pairs: carry out dynamic sealing performance tests under 4 to 5 times the actual service working conditions of the floating oil seal pair, a 2000-hour enhanced dynamic sealing performance test, as well as a 2000-hour service life accelerated durability test on the floating seal pair, so as to verify the operational reliability of floating oil seals under intensified working conditions.
Important parameter:
→Applicable specification range of tested floating seal ring assemblies: Φ250～Φ608 mm (the opening diameter on the moving end of sediment box is Φ650 mm)
→Axial load capacity of the floating oil seal sediment abrasion and corrosion simulation test system: 15 kN
→Axial horizontal loading stroke: 0～350 mm, advancing speed: 20～100 mm/min.
→Forward and reverse rotating speed: 30～200 r/min, cycle counting range: unlimited
→Oil pressure holding range inside floating seal cavity: 0.05～0.4 MPa.
→Power supply of testing machine: 380V±10%, 50Hz with reliable grounding required; total power: approx. 7.5 kW.
→Overall dimension (Length×Width×Height) of load frame: approx. 2500×750×1500 mm, total weight: approx. 3.0 tons.
→Overall dimension (Length×Width×Height) of control cabinet: approx. 1200×1000×1300 mm, total weight: approx. 350 kg.
System Composition:
→HRJ Floating Seal Abrasion Horizontal Loading Pushing System,HRJ High-speed Rotation Driving System ,HRJ Infrared Temperature Monitoring System ,HRJ Friction Operation Constant Temperature Control System ,HRJ Lubricating Oil Leakage Monitoring, Measurement & Judgment System,HRJ Automatic Lubricating Oil Filling System,HRJ Oil Pump Automatic Refueling System,HRJ Mud Discharging System,Sand Box Internal Lighting System ,Safety Protection System,HRJ-Test / PLC Chinese-English Bilingual Control System.
→Horizontal loading frame with high rigidity, excellent stability, free of vibration and impact, and streamlined appearance.
→ Equipped with high-precision force sensors, temperature sensors, displacement sensors and oil leakage detection devices.
→Accessories including floating seal base tooling, oil receiving tray, safety protective cover (transparent top cover) plus front and rear transparent observation windows. →Technical documents: operation manual, packing list, product certificate and HRJ service sheet.
Operation Steps :
1. Install and clamp the floating seal ring, FKM O-ring and floating seal base, then align, fix and lock the assembly.
2. Set test parameters including rotating speed, axial force, concentration of mud, mortar, oil and water mixture, total test duration of 2000 hours and leakage threshold.
3. Start the test: the main shaft rotates with axial load applied, run continuously for 24 hours per day while collecting test data in real time.
4. Test termination: the equipment will automatically stop and save all data when the preset duration is reached, leakage alarm is triggered or abnormal abrasion condition leads to test interruption.
5. Disassembly and inspection: check abrasive wear and erosion on sealing surfaces as well as the bright band area of metal rings to evaluate the anti-sediment abrasion durability of the floating seal assembly.
→Research Contents Carry out research on process fluid dynamics, structural mechanics of fluid mechanical seals, sealing materials for rotary joints of fluid equipment, and fluid lubrication theory. Provide technical guidance for structural design of fluid mechanical seals, conduct research and design on fluid mixing machinery and equipment used in petrochemical industry, as well as sealing technology design for pressure vessels.
→ Conduct 2000-hour performance assessment under muddy working conditions for traveling components of graders, loaders, excavators and bulldozers. Perform verification tests on shaft end seals of shearers and scraper conveyors under high temperature, dust, muddy and water mixed environments.
→ Carry out mud and abrasive erosion tests on cutter seals of TBM shield machines, as well as durability evaluation on hub seals of mining dump trucks under muddy road conditions.
→For diaphragm wall double-wheel trench cutters used in hard rock trenching and anti-seepage trench excavation of deep foundation pits, conduct inspection on alloy crawler cutters in terms of mud abrasion, sand impact and medium leakage.
→Wind power industry application scope: sealing systems for transmission, yaw and pitch mechanisms, sealing rings for pressure vessels, turbocharger sealing rings and packing seal assemblies.
