How to control the oil temperature of ZSC (L) 600-77.5-I-Z gear reducer

ZSC (L) 600-77.5-I-Z belongs to the ZSC series of large medium hard tooth surface gear reducers, which are commonly used in heavy-duty scenarios such as mining and metallurgy. The oil temperature control of this model needs to focus on core aspects such as lubrication management, heat dissipation optimization, working condition adjustment, and real-time monitoring, combined with its heavy-duty characteristics for targeted operation. The specific methods are as follows:

1. Standardize lubrication management to reduce frictional heat generation

Suitable for high-quality lubricating oil: This model of reducer has high friction heat during heavy-duty operation, and requires the use of suitable medium to heavy-duty gear oil (such as ISO VG220-VG320 specifications). In high-temperature environments, PAO fully synthetic oil can be used, which has stronger antioxidant and thermal stability performance, and can reduce oil degradation at high temperatures. At the same time, the oil level height should be controlled between the highest and lowest marks on the oil level gauge to avoid abnormal oil levels affecting lubrication and heat dissipation.

Regular maintenance of lubricating oil: Establish an oil testing ledger, take samples and send them for inspection every quarter. If the viscosity change rate exceeds ± 15% and the moisture content is greater than 0.1%, the lubricating oil should be replaced in a timely manner. In addition, if the oil color turns black, there are metal debris or burnt smell, it is necessary to immediately stop the machine and change the oil to prevent further wear and abnormal heat generation.

2. Optimize the cooling system to accelerate heat dissipation

Clean and strengthen basic heat dissipation: If the reducer comes with heat dissipation fins, it is necessary to regularly use a high-pressure air gun with a pressure of less than 0.5 MPa to clean the surface dust and oil stains. Stubborn stains can be soaked and brushed with metal cleaning agents; Spraying ceramic thermal conductive paint on non sealed surfaces or attaching 2-3mm thick aluminum heat dissipation fins can reduce 5-8 ℃. If installed in a confined space, a diffuser can be added to guide the airflow and improve the natural heat dissipation effect.

Installation of auxiliary cooling device: In long-term heavy load or high temperature environments, an external circulating oil pump can be installed, configured at a flow rate of 0.5L/min/kW, with oil pipes wound through a cooling water tank to achieve oil cooling; A forced air cooling fan can also be installed to blow air towards the heat sink to accelerate heat dissipation. If the heat is extremely high, an external heat exchanger can be equipped to quickly remove the heat from the oil through air or water cooling.

3. Control the operating conditions and reduce abnormal heating

Avoid overload and impact load: Monitor the motor current. If it continues to exceed 10% of the rated value, it is likely to be overload or mechanical blockage. Check the belt tightness, coupling alignment, and other external equipment. If necessary, disconnect the load and conduct a no-load test run for 30 minutes to confirm the source of heating. For frequent start stop scenarios, an inertia flywheel can be installed to reduce the large amount of heat generated by instantaneous impacts.

Correction of installation deviation: Use a dial gauge to check the concentricity of the input/output shaft. If the error is greater than 0.1mm, adjust the base gasket to avoid increased friction and heat generation caused by eccentric operation; If the rigidity of the base is insufficient, epoxy resin adhesive can be filled between the bottom plate and the frame to eliminate the additional frictional heating caused by high-frequency vibration.