Manufacturer: CJSC "Nevskie Zavod"

The centrifugal compressor type K345-92-1 is designed to compress air. Compressor - nine-stage, four-section.

Cleaning the flow path and connector surfaces 

The rotor can be repaired in the following scope: 

1. Cleaning the rotor from deposits 

2. Flaw detection of the rotor by VIC, PVC, MPD methods 

3. Replacement of defective parts: sealing ridges; gear bushings; thrust disc; axial relay disk; impeller; shaft 

4. Grinding necks, thrust disc 

5. Replacement of bearings, filing on breadcrumbs and alignment of babbitt filling. With rotor positioning in the flow path along the housing bores

During long-term operation of the compressor, misalignment of the embedded parts of the compressor may occur (due to warpage of the housing, wear of the centering pins, etc.). Misalignment leads to unevenness of the gap between the rotor and the embedded parts, it is not uncommon for them to touch. This defect leads to a decrease in compressor performance.

Replacement of gas (air) seals is carried out in order to ensure the drawing values of the clearances in the seals to bring the compressor capacity to the formulated values.

Replacement of oil seals is carried out in order to maintain the drawing values of the clearances in the seals to prevent oil leaks.

1. Cleaning the connector surfaces 

2. Replacement of bearings, filing on the outer diameter, sizing of the babbitt layer, with setting the center distance, skew and intersection of the axes of the gear pair 

3. Grinding of necks, thrust disc of the gear pair 

4. Balancing the gear pair

1. Replacing bearings 

2. Replacing the oil seals 

3. Aligning the rotor in the stator magnetic field 

4. Balancing the rotor of the electric motor

Compressor unit alignment, reducer-compressor, reducer-electric motor

1. Mechanical cleaning of the tube bundle 

2. Chemical cleaning of the tube bundle 

3. Pressure testing of the heat exchanger

Productivity at 20 ° С and 0.101 MPa  m3 / min  355
Final pressure  MPa 1,37
Rotation frequency of LPC and HPC rotors  rpm 8600
Power consumption (at the motor coupling)  kW  2500
Cooling water consumption by intermediate air coolers  m3 / h  210
Cooling water consumption by terminal air cooler  m3 / h  50
Cooling water consumption by oil coolers  m3 / h  30
Cooling water consumption by the air cooler of the electric motor  m3 / h  42
Cooling water temperature  °С 30
Cooling water temperature  °С 30

Purpose and scope. The centrifugal compressor type K345-92-1 is designed to compress air.

Brief description of the design. The compressor consists of a compressor itself in a two-cylinder design, an electric drive motor, a step-up gearbox and systems: oil, regulation, control, protection, control and signaling.

Compressor - nine-stage, four-section. A longitudinal section of the compressor is shown in Fig. 19. The LPC has three sections, each of which consists of two stages.

The HPC contains the fourth section, which consists of three stages.

The air is cooled in intermediate air coolers located between the sections. The air coolers are located in the basement. An end air cooler is installed to cool the air after the compressors.

Reducer - single-stage, horizontal,. with double-sided spiral gearing, located between the electric motor and the compressor LPC.

The compressor is driven by a synchronous electric motor of the STD-3200-2U4 type with a capacity of 3200 kW, a voltage of 6000 or 10,000 V, and a rotation speed of 3000 rpm.

The compressor is equipped with a P3000 / 2.87 type gearbox, which allows increasing the compressor rotor speed from 3000 to 8610 rpm.

The compressor rotors are connected to each other, as well as the low-pressure cylinder rotor with the gear wheel and the gear wheel with the electric motor are connected by gear couplings.

Oil system - forced, circulating, provides oil supply for lubrication of the unit and control and protection units.

The automatic control system maintains a constant compressor discharge pressure.

The monitoring, control, protection and signaling system includes: a local panel with devices for starting, stopping and visual monitoring of the unit's operating parameters; remote control panel for protection and signaling; performance sensors; protection devices against surge, reverse air flow, axial displacement and other types of protection, ensuring high reliability of the unit operation.

The scope of delivery of the compressor includes: LPC and HPC, intermediate air coolers of the VOT-62-2 and VOT-115-1 types, the RZOOO / 2.87 type reducer, the BOT-115 end-type air cooler, a synchronous electric motor with a closed ventilation system with air coolers.

Serial production started in 1971.

Photo gallery of performed works