With the continuous improvement of efficiency requirements in industrial production, the performance, speed, and core operating parameters of compressors continue to be optimized and upgraded. But in this process, the high temperature phenomenon inside the cylinder also becomes an unavoidable problem. Especially in two harsh scenarios, this problem poses a more significant constraint on the stable operation of equipment: one is the PET industry, whose production process has extremely high requirements for the stability of compressor operating conditions and the purity of gas media; The second is oil-free working conditions, which have strict requirements for the cleanliness of gas media, further amplifying the negative impact of high-temperature environments. In the high-temperature environment of these two types of working conditions, the performance of the seal directly determines the operating efficiency, stability, and maintenance cost of the compressor, and its service life is the core key factor related to the continuous operation ability of the equipment, becoming an important shortcoming affecting the smoothness of production.
In response to the performance bottleneck of seals under high temperature conditions, Nirvana Machinery relies on its independent research and development capabilities to launch the B-series high-performance polymer material seals. Through material innovation and process optimization, it accurately solves industry pain points:
Independently developed core material: The B-series high-performance polymer material is the result of independent research and development by Nirvana Machinery. It breaks the limitations of traditional materials and is specifically designed to meet the tolerance requirements of high-temperature working conditions, ensuring the high-temperature adaptability of seals from the source.
High quality raw materials and advanced technology: using imported high-quality raw materials to improve product reliability from the material foundation; Paired with exclusive special die-casting technology, the performance of raw materials is fully utilized, making seals more advantageous in structural stability and material uniformity, further enhancing their performance under high temperature conditions.
Significant advantages in high temperature conditions: After practical verification, B-series material seals can maintain stable sealing performance in high temperature environments, and are less prone to aging, deformation, failure, and other problems due to high temperatures. Compared with traditional seals, they have significantly improved high temperature resistance, service life, and sealing reliability.
With excellent high-temperature adaptability, the B series material seals of Nirvana Machinery have been widely used in multiple scenarios and brands of units, and have achieved excellent performance. The unit brands and scenarios that have been successfully applied include internationally renowned brands such as ATLAS, SEAT, Ingersoll Rand, Gardner Denver, etc; In terms of domestic scenarios, it has deeply adapted to the equipment of multiple domestic PET machine manufacturers, fully covering the PET industry and the requirements of oil-free high-temperature working conditions. The reliability and adaptability of the product have been verified through practical application results, and have been widely recognized in the market.
With the deepening of the national energy strategy, the demand for peak shaving of underground gas storage facilities along the West East Gas Pipeline is becoming increasingly urgent, and the nitrogen boosting technology in oil and gas field exploitation is also developing towards higher pressure and deeper well locations. In these key areas, the application of high-pressure compressors has become an essential equipment for improving energy utilization efficiency and ensuring energy security; Nirvana Machinery focuses on the core pain points of high-pressure unit seals and conducts specialized research and development from multiple dimensions such as material innovation, structural optimization, and heat dissipation upgrades, forming a complete set of sealing solutions suitable for ultra-high pressure working conditions.
1、 Breakthrough in core technology research and development
（1） Material innovation: Customized high-performance K006 material, suitable for extreme working conditions
The performance of sealing materials directly determines the reliability of the sealing system. Nirvana Machinery has successfully developed K006 high-performance specialized material based on the excellent foundation of conventional PEEK high-performance polymer material and independently developed material modulation technology. Through composition optimization and process improvement, this material has significantly improved its hardness and tensile strength compared with conventional PEEK material, which can not only adapt to higher load operating conditions, but also stably cope with inert gas, rare gas and other complex media environments, improving the wear resistance and anti-aging performance of seals under extreme conditions from the source, providing material guarantee for long-term stable operation of the sealing system.
（2） Structural optimization: Combination piston ring design, covering the entire pressure range
In response to the differences in sealing requirements under different pressure conditions, Nirvana Machinery adopts a combined piston ring scheme that is suitable for high-pressure conditions, and innovatively combines multiple piston ring types with different structures. This design can achieve comprehensive coverage of the pressure range of 350-900 bar. Whether under medium high pressure or ultra-high pressure conditions, it can ensure the stability of the sealing gap through precise structural matching, effectively avoid high-pressure gas leakage, and reduce the friction loss between the piston ring and cylinder liner, improving the smoothness and energy efficiency of the unit operation.
（3） Heat dissipation upgrade: 340 ° refrigeration cycle system, eliminating traditional O-ring sealing around the piston rod
The frictional heat generated during high-pressure sealing is a key factor affecting the service life and operational stability of seals. To this end, Nirvana Machinery innovatively adopts a 340 ° eight door cooling ring without stagnant flow unidirectional waterway circulation system in the sealing process of the packing box. The system achieves uniform cooling of the sealed area in all directions through a full angle surround waterway layout. At the same time, the unidirectional circulation design without stagnation ensures efficient circulation of the heat dissipation medium, completely solving the problems of local overheating and uneven heat dissipation in traditional heat dissipation structures. It greatly improves the accumulation of frictional heat generated by high-pressure sealing and significantly enhances the thermal stability of the sealing system.
The high-pressure unit sealing solution developed by Nirvana Machinery has been rigorously validated in actual working conditions and has demonstrated excellent performance in multiple key projects, gaining widespread recognition in the industry.
-International Unit Adaptation: Successfully applied to the imported American Ariel ultra-high pressure unit in Xinjiang oil and gas fields, the seals operate stably in extreme pressure and complex medium environments, with a service life far exceeding the industry average. User feedback shows excellent performance.
-Domestic OEM support: It has fully adapted to the high-voltage unit research and development projects of multiple domestic OEMs, including key projects such as high-voltage units in the Bengbu market and high-voltage units in the Sichuan Chongqing region. The adaptability and reliability of the solution have been fully recognized by domestic manufacturers, providing core sealing support for the technological upgrade of domestic high-pressure units.
On the basis of existing technological achievements, Nirvana Machinery continues to deepen its cultivation in the field of ultra-high pressure sealing and conducts special research and development for the Burckhardt series of ultra-high pressure units. On the one hand, it develops and produces hydraulic sealing ring sets for Burckhardt primary and secondary ultra-high pressure units, with a sealing pressure exceeding 1000 bar, breaking the upper limit of ultra-high pressure sealing; On the other hand, the development of a combined oil scraper ring adapted to the special body system of Burckhardt has solved the problem of sealing and oil scraping coordination under the special structure of this model. At present, these two new products have achieved significant results in the practical application of oil and gas fields in Xinjiang, further expanding the technical coverage of Nirvana Machinery in the field of ultra-high pressure sealing.
