Tubular oil cooler hydraulic oil cooling heat exchanger

The shell-and-tube oil cooler (also known as the shell-and-tube oil cooler) is a heat exchange device widely used in industrial fields, primarily for cooling oil in hydraulic systems, lubrication systems, and power units to ensure equipment operates at suitable temperatures. The following provides a detailed introduction based on search results:

I. Structure and Working Principle

1. Basic Structure
   Composed of a shell, tube bundle (heat exchange tubes), tube sheets, baffles, etc.
   • Tube Side and Shell Side: Oil typically flows through the shell side, while cooling water flows through the tube side; some designs use double or quadruple tube passes for water flow to improve efficiency.
   • Temperature Compensation: Floating tube sheets or U-tube designs are used to eliminate thermal stress and accommodate temperature differences (special treatment is required when the difference exceeds 50°C).
2. Working Principle
   • Oil flows in a spiral or zigzag pattern inside the shell due to baffles, extending heat exchange time; cooling water flows inside the tubes, absorbing heat from the oil through the tube walls before being discharged.
   • The typical heat transfer coefficient is 300~350 kcal/m²·h·°C, with oil temperature reduction reaching over 8°C.

II. Core Features

1. Efficient Heat Transfer
   • Uses copper finned tubes or stainless steel tubes to increase heat exchange area; some models include spiral guide plates to reduce dead zones in heat exchange.
2. Compact Structure
   • Small size and lightweight, suitable for complex installation environments; floating tube sheet design facilitates disassembly and maintenance.
3. Pressure and Temperature Resistance
   • Operating pressure ≤1.6MPa (oil side), temperature ≤100°C; water side pressure ≤1.0MPa, temperature ≤50°C.
4. Diverse Materials
   • Heat exchange tubes can be made of copper, stainless steel, titanium, etc., suitable for corrosive media or seawater environments.

III. Application Fields

1. Power Systems: Turbine oil cooling for steam turbines, condenser support.
2. Construction Machinery: Hydraulic oil cooling (e.g., excavators, injection molding machines).
3. Metallurgy and Chemical Industry: Cooling for thin oil lubrication systems, high-temperature oil cooling.
4. Marine and HVAC: Lubrication system and air conditioning cycle cooling.

IV. Usage and Maintenance Points

1. Operating Standards
   • Start by introducing cooling water first, then hot oil; reverse the sequence during shutdown to prevent thermal stress damage.
2. Maintenance
   • Clean tube wall scale or oil deposits every 5~10 months; drain residual water in cold seasons to prevent freezing and cracking.
3. Fault Handling
   • If heat exchange efficiency declines, check for filter clogging or tube bundle leakage; replace O-rings or tube bundles if seals fail.

V. Selection and Special Designs

• Custom Requirements: Select heat exchange area (0.5~5600m²) and installation type (vertical/horizontal) based on flow rate, temperature difference, and medium characteristics.
• Innovative Designs: Such as patented grooved sealing plates, which enhance backwashing effects and reduce maintenance frequency.

For more detailed technical parameters or application cases, refer to the product manuals provided by companies in the search results (e.g., ).