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ul. Ovtsinskaya, 66Д
Sverdlova Settlement, 188682
Sverdlova Settlement, 188682
Compressor К500-61-1
Compressors К500-61-1 and К500-61-5 are designed to compress atmospheric air. Compressed air can be supplied both to various process cycles and to the pneumatic system of the enterprise.
A single-casing compressor with 3 sections, two stages per each section. The first stages of the sections are designed with channel membranes. The end stage of section 1 is designed with a vane diffuser (VD), and end stages of sections 2 and 3 are designed without diffusers. After each compression section gas is supplied to water-based coolers. The compressor is driven by a synchronous motor. The rotor is rotated through a multiplier that increases rotational frequency to 7,625 rpm.
A single-casing compressor with 3 sections, two stages per each section. The first stages of the sections are designed with channel membranes. The end stage of section 1 is designed with a vane diffuser (VD), and end stages of sections 2 and 3 are designed without diffusers. After each compression section gas is supplied to water-based coolers. The compressor is driven by a synchronous motor. The rotor is rotated through a multiplier that increases rotational frequency to 7,625 rpm.
Earlier the compressor had been upgraded to increase output and reduce final pressure in the ammonia spirit shop of JSC Akhema. During the upgrading the functional diagram of the units was changed – the rotor is designed with 4 operating compression took place in 2 sections. The operation showed that the upgraded compressor operates near the antisurge control adjustment line, does not ensure rated final pressure, and its range of operation is limited with early supersonic blockage.
LLC RPC ENTECHMASH suggested the compressor be upgraded with an increase in output and ensuring the required final pressure.
LLC RPC ENTECHMASH suggested the compressor be upgraded with an increase in output and ensuring the required final pressure.
The upgraded compressor is designed similar to the original one with 6 impellers, which allowed the load to be distributed through the sections.
A high-pressure three-dimensional impeller designed taking into account the increased local Mach numbers is used in the first stage. Medium- and low-pressure impellers expanding the operational range of the compressor are used in the remaining stages.
The first stage is designed with a vaneless diffuser to ensure a wide range of stable operation. The second stage is designed with an expanded vane diffuser, which allowed the flow angle at the entry to the collection chamber to be retained. The stages of sections 2 and 3 are designed with stator elements retained.
The design of labyrinth seals is improved: staged replacement retainers to reduce leakage and simplify installation are used.
A high-pressure three-dimensional impeller designed taking into account the increased local Mach numbers is used in the first stage. Medium- and low-pressure impellers expanding the operational range of the compressor are used in the remaining stages.
The first stage is designed with a vaneless diffuser to ensure a wide range of stable operation. The second stage is designed with an expanded vane diffuser, which allowed the flow angle at the entry to the collection chamber to be retained. The stages of sections 2 and 3 are designed with stator elements retained.
The design of labyrinth seals is improved: staged replacement retainers to reduce leakage and simplify installation are used.
In September 2017 acceptance tests were performed, the upgraded compressor was commissioned. The output is increased by ~12%, the required final pressure achieved, the range of stable operation expanded. The rated operating conditions with the retention of the existing motor are ensured.
