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Piston compressor

New Energy Compressor – Needle Roller Bearing

Features: Designed for the crank‑piston end of reciprocating compressors. Currently, most piston needle bearings are imported, with only a small fraction assembled domestically from off‑the‑shelf components. The typical designs fall into three categories: stamped‑steel needle rollers with an oil seal, solid full‑needle rollers with an oil seal, or self‑assembled full‑needle rollers with an oil seal—each of which encounters numerous issues in service. Our company employs a solid‑needle roller design that incorporates an integral seal and pre‑filled grease, ensuring reliable lubrication even under high‑speed and vibration conditions. Additionally, the bearing width has been increased and the roller dimensions extended, reducing stress and wear during slight oscillations and providing smoother performance under impact loads. For sealing, we use a specialized rubber combined with a spring‑steel plate and a double‑lip radial locating structure on the inner ring, enhancing sealing accuracy and minimizing grease leakage under vibratory operating conditions. As for the lubricant, we utilize high‑temperature grease imported from Germany, formulated with nano‑scale solid additives, making it ideally suited for high‑temperature, heavy‑load, and fretting‑wear applications. This product is also suitable for use in scroll compressors, vacuum pumps, and other industries.

New Energy Compressor – Composite Bearing with a Pin Shaft

Features: Designed for the rod‑end of piston compressors; compared with crankshaft bearings, the load at this location is relatively lower. However, due to space constraints, the bearing size cannot be excessively large, and axial positioning is required. In early multi‑cylinder engines, customers typically opted for either deep‑groove ball bearings or full‑complement needle roller bearings, but both approaches presented certain drawbacks. Deep‑groove ball bearings are larger in size yet offer limited load capacity, while needle roller bearings lack reliable axial retention and struggle to maintain effective grease lubrication. Our company employs a composite rod‑end bearing with a pin, featuring two structural designs: thickened inner and outer rings, an enlarged inner raceway diameter, and a widened interference fit on the axial retaining snap ring. This configuration ensures smoother operation under impact loads and prevents axial movement that could lead to frame distortion. Regarding the cage, it undergoes special treatment to achieve superior wear resistance, while maintaining adequate plasticity and rigidity in the core, thereby enhancing impact‑resistance. Alternatively, high‑performance polymer composites may be used to reduce weight and improve operational stability, facilitating oil‑film formation. For lubrication, we utilize German‑imported high‑temperature grease containing nano‑scale solid additive particles, making it well suited for high‑temperature, heavy‑load, and fretting‑wear conditions. This product can also be applied in electric vehicles, gearboxes, and other industries.

New Energy Compressor – Composite Bearing

Features: Designed for crankshafts in reciprocating compressors. In the early design phase, the customer evaluated two solutions and conducted life‑testing, both relying on imported bearings. The first option used a single set of deep‑groove ball bearings; however, during testing, the assembly disintegrated at high temperatures after approximately 100 hours of operation. The second option employed a double‑row solid needle roller bearing, which ultimately seized due to lubrication issues toward the end of testing—neither solution met the desired service life requirements. In response to these findings, our company developed a compact, higher‑capacity composite bearing that combines a ball and a cylindrical roller, featuring integrated sealing and lubrication. It can handle bidirectional combined loads: radial impact loads are primarily borne by the rollers, while axial loads are supported solely by the steel balls (for axial positioning). Additionally, the increased roller diameter significantly enhances load‑carrying capacity compared with the original needle roller bearing. The retainer is made from a high‑performance polymer composite, offering excellent high‑temperature resistance, reduced weight, and improved operational stability. The grease used is a German‑imported high‑temperature formulation containing nano‑scale solid additives, making it well suited for applications involving high temperatures, heavy loads, and fretting wear. This bearing is also applicable to scroll compressors, pumps, gear reducers, and other industries.

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