The early introduction of the repair process of foreign axial compressors. The focus is on the mapping and processing of moving and moving blades, in-plant assembly and on-site installation and commissioning. The analysis of the external axial compressors is the same as that of the axial compressors manufactured by our company. The structural design is very different (for example, the two parts of the casing are both welded and vented, the stator blades are fixed in different ways, the adjustment cylinder is exposed, etc. ).

Clean the stator and rotor parts of the unit. After observing the measurement, list the key points: the removal and installation of the vane cylinder part, and the removal and installation of the rotor part.

Technical points (1) Due to the limitation of the operating space, the 9th stage vane removal is difficult, and the precision of the position of the vane pin hole is high. If there is any error, it will directly affect the performance of the fan. Corresponding tooling must be made to ensure pin hole accuracy. Strictly ensure the static tip clearance to ensure the correct position of the rotor in the cylinder.

(2) Demolition of the rotor blade; determination of the length of the blade; determination of the blade clearance; locking of the blade.

The determination of the relative position of the rotor and the cylinder.

The establishment of a cold calibration curve; the formulation of the speed-up curve; the synchronization test of the servo motor.

The formulation and implementation of the plan firstly formulated technical solutions such as disassembly, assembly, user commissioning and commissioning, followed by deformation of the axial compressor compressor cylinder (severe deformation near the exhaust side of the cylinder, and analysis of its roundness (0.300.50mm)) , develop a repair plan.

Main technical problems (1) Dismantling technology The structure of each component (blade, locking group) on the rotor is completely different from our company. Disassembling the locking set does not damage any part of the rotor. Specific embodiment: Both ends of the rotor are supported by V-shaped iron, and the universal rocker drill is used to drill the moving blade locking group. The drilled holes of each level are required to drill the depth of the cylinder. The 10th stage is not adjustable. The determination of the circumferential expansion state of the blade on the rotor of the thermal expansion with the small wedge iron along the blade root portion.

Two schemes have been developed to measure the internal taper of the cylinder, and the results are very small, which ensures the roundness accuracy of the rotor rotor. The stator vane of the cylinder and the vane of the vane are connected by a taper pin and welded at the small end of the taper pin, so the difficulty of disassembly is increased. Among them, the difficulty of the 9th level is the biggest because of the space limitation. It is not possible to use the method of grinding the solder joints and then punching the taper pins from the small end. Therefore, the following scheme is adopted for the 9th stage: the Z3140A drilling machine and the 20 or 22 drill bit are used to drill the broken cone pin connection along the direction of the vane petiole, and the crank cannot be damaged.

(2) Measurement items The position of the rotor in the cylinder is determined. The radial turbulence of the vanes in the cylinder bore in the cylinder bore (3) Technical points of the assembly The rotor assembly needs to solve the problem of correction of the assembly of the locking group, the circumferential expansion of the bucket and the imbalance.

Adjustable vane assembly should be designed with special tooling to solve the problem of positioning the cone pin for the vane and crank. Tooling should meet the following requirements: measurement function with universal angle ruler; measurement function with vernier caliper; adjust the relative position of crank and vane to be securely fixed. When assembling the non-adjustable vanes, ensure the axial expansion of the vane. Assembly of the rotor and the cylinder.

The actual position of the simulated rotor in the bearing cylinder, the design tooling as shown in Figure 1. Solve the rotor rounding amount of the rotor and ensure the correctness and reliability of the moving blade, static blade clearance and other technical requirements.

(4) Design rotor high-speed dynamic balance tooling (for high-speed dynamic balancing machine of Nanjing Automobile).

The domestic DH50 small rigidity bracket is used to ensure the high-speed dynamic balance rotor precision; the foreign fan bearing is selected as the support, and the transition sleeve that meets the bearing and DH small-stiffness bearing housing matching precision requirements is designed, and the bearing oil inlet problem is considered.

(5) Unit commissioning scheme (this unit consists of steam turbine and axial compressor) installation and commissioning; formal assembly and inspection of rotor and cylinder matching clearance; adjustment of adjustment cylinder and servo synchronization, control of left and right servo motor synchronization Travel error (<0.10mm); adjust the adjustment cylinder and servo mechanism so that the first stage vane is at the standard intermediate angle position, so as to correctly establish the Q, p, f, (s) function relationship to meet the process requirements; The curve is based on a steam turbine to align the compressor with a three-meter method.

(6) The speed-up curve of the unit linkage test is shown in Figure 2.

For the first time, the working turbine has successfully completed the task of assembling and commissioning foreign axial compressors in the factory, mechanical properties of the fans (bearing temperature, rotor vibration) and aerodynamic performance (flow, pressure and variable operating conditions) And other technical indicators have reached the requirements of similar foreign products, and we have accumulated experience in the future surveying, painting, manufacturing and repairing similar foreign wind turbines.

Auxiliary Equipment For Packaging Lines

Auxiliary Equipment For Packaging Lines,Auxiliary Equipment Packaging Lines,Packaging Lines Auxiliary Equipment,Auxiliary Equipment For Packaging Line

SUZHOU SHENGBAIWEI PACKAGING EQUIPMENT CO.,LTD , https://www.sbwpack.com