Rotary Rings are a type of rotating seal widely used in various rotating equipment, such as rotary joints, rotary couplings, rotary connectors, etc. Its main function is to prevent liquid or gas leakage and maintain the normal operation of the equipment. In different applications, the material, structure, sealing method, size, etc. of Rotary Rings vary to adapt to different working conditions.
The materials of Rotary Rings are mainly divided into two categories: metallic and non-metallic.
Metal materials mainly include stainless steel, steel, copper, aluminum, etc., which have characteristics of high strength, corrosion resistance, wear resistance, and are suitable for rotary seals in harsh environments such as high temperature, high pressure, and high-speed.
Non metallic materials mainly include ceramics, silicon carbide, graphite, etc., which have characteristics such as high hardness, high wear resistance, and low friction coefficient. They are suitable for rotary seals under conditions such as low temperature, low pressure, and high speed.
The Rotary Rings with a unidirectional rotation structure can only rotate in one direction and are suitable for devices with only unidirectional rotation.
The Rotary Rings with a bidirectional rotation structure can rotate in two directions, suitable for devices that require bidirectional rotation.
The Rotary Rings with a rotating stationary structure are composed of a rotating ring and a stationary ring. The rotating ring contacts the stationary ring during rotation to achieve sealing, suitable for equipment that requires a rotating stationary seal.
The sealing methods of Rotary Rings are mainly divided into mechanical sealing and liquid sealing.
Mechanical sealing is achieved through the contact surface between the rotating ring and the stationary ring, which has the characteristics of high reliability, long service life, and simple maintenance. It is suitable for rotary sealing in harsh environments such as high speed, high temperature, and high pressure.
Liquid sealing is achieved by injecting liquid between the rotating ring and the stationary ring, which has the characteristics of good sealing performance, low friction coefficient, and preventing dry friction. It is suitable for rotary sealing under low speed, low temperature, low pressure, and other conditions.
The size of Rotary Rings is mainly determined by the equipment requirements, including inner diameter, outer diameter, thickness, shaft diameter, etc.
Rotary Seals,Rotary Lip Seal,Rotating Shaft Seal,V Seals DG Zhongxingshun Sealing Products Factory , https://www.zxs-seal.com
The structure of Rotary Rings is mainly divided into three types: unidirectional rotation, bidirectional rotation, and rotational stationary.
1. Unidirectional rotating structure
Photovoltaic enterprise penetration terminal preparation power station project
The photovoltaic industry, which has faced significant challenges due to the "double reverse" in Europe, is finally seeing a ray of hope. Following calls from over 1,000 European PV companies urging the EU to lift sanctions against Chinese firms, the Ministry of Industry and Information Technology has confirmed that new domestic policies supporting the solar photovoltaic sector are on the way. This development signals a strategic shift toward consolidation and strengthening competitiveness within the industry.
According to foreign media reports, more than 1,000 European PV companies have requested the European Commission to remove punitive tariffs on Chinese solar products. They argue that these tariffs, imposed as part of anti-dumping and countervailing investigations, could severely impact European manufacturers and slow down the growth of the regional solar market. While the outcome of these investigations remains uncertain, the growing pressure from industry players suggests a potential shift in policy direction.
Li Wei, an analyst at Zhuo Chuang Information New Energy, noted that although the European Commission's decisions may not directly affect China’s solar industry, they do provide a sense of relief. The Commission initiated anti-dumping and countervailing investigations against Chinese solar panels in September and November last year, with rulings expected around June this year. This uncertainty has created a challenging environment for Chinese manufacturers.
In response, the Chinese government has taken proactive steps to support the sector. At a recent public meeting, the Ministry of Industry and Information Technology confirmed it is working with relevant departments to develop policies aimed at promoting the healthy development of the solar photovoltaic industry. These policies are expected to include measures such as mergers and acquisitions, subsidies, technological innovation, and adjustments to electricity pricing.
Li Wei emphasized that the current phase is one of difficulty for the industry, but the government’s support signals a positive turning point. Encouraging mergers and acquisitions can help consolidate the market, enhance the position of leading enterprises, and drive innovation. He also pointed out that stricter industry standards—based on technology, production capacity, and environmental protection—will help curb overcapacity and promote long-term sustainability.
Another key focus is the transition from manufacturing to terminal applications. Shandong Province, a major player in the solar industry, has been actively pushing for this shift. Linuo Power Group, for example, has deployed 14 marketing offices nationwide and secured nearly 700 MW of distributed PV projects, with over 280 MW in Shandong alone. The company reported that in the first quarter of this year, it launched more than 100 MW of domestic PV power plants, accounting for a third of its annual output.
Shandong has also made significant progress in building a comprehensive solar energy ecosystem. Through both foreign investment and independent initiatives, the province has entered the fields of crystalline silicon cells, thin-film batteries, and solar modules. Companies like Dongying Photovoltaic, Linuo Photovoltaic, Huangming Solar, Vosges Photovoltaic, Yulang Energy Technology, and Juhuang New Energy have formed industrial clusters, driving local development.
To further boost the industry, Shandong allocated 800 million yuan last year to encourage the installation of photovoltaic systems in homes and businesses. A portion of this funding was directed toward solar building applications, the "Golden Sun" project, LED energy-saving renovations, and subsidies for solar power projects.
This year, the province aims to accelerate the shift from product manufacturing to end-user applications, with plans to build 1 million square meters of solar thermal systems and save 180,000 tons of standard coal. As the industry continues to evolve, the combination of policy support, market expansion, and technological advancement will be crucial in ensuring sustainable growth.