Cylinder head and cylinder head curve

The curved surface of the diaphragm compressor cylinder head membrane cavity directly determines the stress distribution of the diaphragm during operation, and has a great influence on the working efficiency of the compressor and the service life of the diaphragm. Zhong Ding Heng Sheng has developed and mastered a set of mature cylinder head membrane cavity curved surface design technology. Our company conducts corresponding variable curved surface design and curvature correction of the cylinder head membrane cavity curved surface according to different operating conditions and application scenarios such as different intake and exhaust pressures and compression media to ensure the optimal cylinder head curved surface to match the operation of the compressor. It is our company's unique "Luo's Curve Technology", which enables our company to have higher compression efficiency than diaphragm compressors of the same cylinder diameter and the same type in the market, which can be increased by more than 15% - 20%, and the service life of the diaphragm is longer. In addition, compared with the original diaphragm compressor cylinder head consisting of three parts: the cylinder block, the oil distribution plate and the cylinder head, the new cylinder block structure developed by our company cancels the oil distribution plate component. The new design structure combines the functions of the original cylinder block and the oil distribution plate, greatly simplifies the processing difficulty, reduces one sealing surface, and improves the oil pressure transmission efficiency of the cylinder block. We are one of the few diaphragm compressor manufacturers in China that master this technology and use it maturely.

Diaphragm

There is a mature simulation technology for the flow field of the compression medium and the diaphragm. The deformation of the diaphragm under different pressures on the oil and gas sides when in the H₂ medium and its theoretical service life have been studied.

To ensure the good mechanical properties and service life of the diaphragm, our company adopts self-developed diaphragm heat treatment technology and surface treatment technology, as well as a fully automatic diaphragm production process. Our company has jointly developed a new type of diaphragm material with the addition of rare earth elements with Fushun Special Steel Research Institute. This material has better mechanical properties and heat treatment stability. Subsequently, through our company's specially designed pickling and passivation process for the diaphragm, various dirt such as oil stains, rust, and oxide scale is removed, and then electrolytic polishing is carried out to significantly improve the surface finish of the diaphragm. For large-sized diaphragms, the sandblasting process is further carried out to improve the surface quality, increase the surface hardness and anti-friction property, reduce surface wear, and improve the service life and durability of the diaphragm. And for low-flow and small-sized diaphragms, the sandblasting process is innovatively omitted to ensure the low roughness of the diaphragm, while reducing the clearance volume of the compressor and improving the efficiency.

Design and manufacture of 22MPa H₂ filling diaphragm compressor

The rapid development of the hydrogen energy industry has made the transportation of hydrogen by 22MPa tube-bundle vehicles an important scenario in "hydrogen production, storage, transportation, and refueling". The GD5 type H₂ filling diaphragm compressor that our company has developed and maturely applied is the mainstream in this market. Due to its efficient compression efficiency, good operational stability, low failure frequency, and reasonable layout structure, it occupies 70% of the H₂ filling market share. Our company entered and actively laid out the H₂ filling market very early. Benefiting from the company's mature design experience in G4/G5 large compressors, for the GD5 type H₂ filling diaphragm compressor, through in-depth research on the characteristics of the H₂ medium and in-depth theoretical research and experimental data feedback on the compressor's operation when compressing this medium, including noise, vibration, cylinder head membrane cavity curve and diaphragm life, gas valve characteristics, oil circuit system characteristics, servo valve characteristics, etc., a reasonable design, production and operation plan for the H₂ filling diaphragm compressor is obtained. And continuously obtain a large amount of operation conditions and after-sales problem feedback from the actual application of customers, and summarize experience to guide design and production, thereby further improving the rationality of the H₂ filling diaphragm compressor product and becoming one of our company's core products in the hydrogen energy industry.

Design and manufacture of 45MPa diaphragm compressor for hydrogen refueling stations

The design and manufacture of 45MPa diaphragm compressors for hydrogen refueling stations is also one of our company's core technologies. Through mature static simulation technology and theoretical calculation, a split-type cylinder head dedicated to high-pressure H₂ medium has been developed, adopting a three-layer structure of cylinder block, cylinder head and gland, reducing costs while ensuring theoretical strength; The entire gas path system is also calculated through mature theoretical calculations to ensure high pressure resistance and service life; The cooling system is simulated by CFD of the flow field to ensure that the cooling effect meets the standard; The pipeline layout of the entire gas, water and oil circuits has also been verified for rationality through theoretical calculations by the pulsation analysis independently mastered by our company, and guides the optimization of the pipeline layout to reduce noise and vibration; Thanks to the good market application performance of 45MPa diaphragm compressors for hydrogen refueling stations, our company has achieved a market share of over 40% in the field of hydrogen refueling stations.