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Device and method for monitoring cat's claw load change during steam turbine start-up to hot state

A load change, steam turbine technology, applied in safety devices, machines/engines, mechanical equipment, etc., can solve problems such as the inability to monitor the load change process of the cat's paw, reduce irregular deformation and vibration of the cylinder, reasonable load distribution, and later Easy to use effect

Active Publication Date: 2021-02-26
SOUTHEAST UNIV
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  • Description
  • Claims
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Problems solved by technology

[0004] Purpose of the invention: The purpose of the present invention is to provide a device and monitoring method for monitoring the change of the cat's claw load during the start-up of the steam turbine to the hot state, so as to solve the problem that the change process of the cat's claw load cannot be monitored at present

Method used

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  • Device and method for monitoring cat's claw load change during steam turbine start-up to hot state
  • Device and method for monitoring cat's claw load change during steam turbine start-up to hot state

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] like figure 1 As shown, the device for monitoring the load change of the cat's claw during the start-up of the steam turbine to the hot state includes a strain gauge 4, a wireless transmitting device 5 and a wireless receiving device 6. The strain gauge 4 is symmetrically arranged on the side gasket 2 of each cat's claw 1, and the strain gauge The sheet 4 is connected to the built-in full-bridge Poisson's ratio circuit in the wireless transmitting device 5, the wireless transmitting device 5 is connected with the wireless receiving device 6 for wireless signals, and the strain gauge 4 is pasted on the cat's paw gasket 2 by adhesive.

[0022] When the above device is used to monitor the load change of the cat's claws from the start to the hot state of the steam turbine, a set of strain gauges should be arranged symmetrically on both sides of each cat's claw and a...

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Abstract

The invention discloses a device and a monitoring method for monitoring the load change of a cat's claw during the start-up of a steam turbine to a hot state. The device includes a strain gauge, a wireless transmitting device and a wireless receiving device. Into the balanced bridge circuit in the wireless transmitting device, and the wireless transmitting device is connected with the wireless receiving device for wireless signals. The present invention utilizes the micro-strain technology to arrange strain gauges on the side of the cat’s claw of the cylinder and above the gasket to measure the strain of the cat’s claw and calculate the actual load. The monitoring method of the present invention not only has high load measurement accuracy, but also can All cat claw loads can be directly obtained without repeated measurement of each cat claw load, and the later operation is more convenient. At the same time, it can monitor the change of cat claw load from the start to the hot state of the unit, which provides a basis for redistribution of cylinder load during overhaul in the future. Based on this, the cylinder load distribution is more reasonable.

Description

technical field [0001] The invention relates to the monitoring of the change of the cat claw load of a steam turbine, in particular to a device and a monitoring method for monitoring the change of the cat claw load of the steam turbine from starting to a hot state. Background technique [0002] The steam turbine generator set is the core equipment of the thermal power plant. The installation quality of the cylinder has an important influence on the operating performance of the unit. Under normal circumstances, the high-pressure cylinder and the medium-pressure cylinder are supported on the bearing seats at both ends by four cat claws at the front, rear, left, and right. In order to ensure that the gravity of the cylinder is reasonably distributed to each cat claw, so that the cylinder is stable and stretches freely on each bearing surface, so that it can expand and contract freely during operation, load distribution is required during installation of the cylinder. If the l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D21/00F01D25/00
CPCF01D21/003F01D25/00
Inventor 朱溢铭杨建刚
Owner SOUTHEAST UNIV
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