Rotating joint for solar energy
Rotating joint for solar energy
Solar specific rotary joints are mainly used as collectors in solar thermal oil boilers. Solar thermal oil boilers are boiler systems that use solar energy to heat thermal oil and can stably output it. They are mainly composed of three parts: solar collectors, accumulators, and thermal oil boilers.
The rotary joint of solar photovoltaic power generation equipment belongs to the category of high-temperature rotary joints. It converts solar energy into radiant energy to heat the fluid medium, which is transmitted through a dedicated rotary joint to a heating tank or tank with a water tank, and converted into steam energy to drive a steam turbine for power generation; According to the fluid medium, it can be divided into thermal oil rotary joints, thermal silicone oil rotary joints, and high-temperature molten salt rotary joints. The flange and welding connection methods can be selected according to the equipment operating conditions; The entrance of the transmission medium can be freely selected to enter through the side or rear according to the working conditions.

Product Features
1. Use high-temperature resistant sealing rings
2. Multi spring balance compensation mechanism
3. Low rotational torque
4. Able to withstand both axial and radial loads simultaneously
5. Choose imported high-temperature resistant bearings
6. Imported sealing material, maintenance free, long service life
| Item | Parameter | Remarks |
|---|---|---|
| Product Name | Solar Trough CSP Rotary Joint | Special for solar thermal power collector equipment, medium: thermal oil / molten salt |
| Nominal Diameter | DN25 / DN32 / DN40 / DN50 / DN65 | Customizable |
| Working Medium | Thermal oil, molten salt, high temperature heat transfer fluid | For trough concentrated solar power |
| Max Working Temperature | Thermal oil: 350℃; Molten salt: 600℃ | Depends on seal selection |
| Rated Working Pressure | 1.6~2.0 MPa | Static pressure resistance: 2.5 MPa |
| Permissible Rotation Speed | 0~5 rpm | Low speed for solar tracker, typical 2 rpm |
| Structure Type | Single channel L-type (3 fixing bolts design same as photo) | Black painted housing, stainless steel rotating shaft |
| Housing Material | 45# steel blackened / alloy steel | High temperature & corrosion resistant |
| Shaft Material | 304 / 316L stainless steel | Wear resistant & anti high-temperature oxidation |
| Seal Material | High temperature graphite + silicon carbide | Suitable for high temperature working condition |
| Rotating Torque | 80~170 N·m | Increases with nominal diameter |
| Connection Type | Flange / External thread | Customizable per customer drawing |
| Application Environment | Outdoor, sand & UV resistant | Applicable for desert power station |
| Service Life | ≥30000 h | Regular maintenance for seal replacement |
| Leakage Grade | Slight seepage (allowed tiny film leakage, no dripping) | General standard for high temp rotary joints |