阅读说明：本技术 一种用于精密设备或大型风机检修安装中测量间隙的方法 (Method for measuring clearance in maintenance and installation of precision equipment or large-scale fan ) 是由 刘永龙 王仲杨 于 2021-08-20 设计创作，主要内容包括：本发明公开了一种用于精密设备或大型风机检修安装中测量间隙的方法,涉及精密设备或大型风机检测技术领域,通过取用贴片并将贴片剪成小片,然后将剪成小片的贴片均匀贴到设备的T型密封上进行压间隙试装,试装后测得贴片厚度,然后在设备的转子与机壳压盖密封圈前加装垫片,由测得的贴片厚度间接确定垫片的厚度,最后根据垫片的厚度测得设备叶轮与T型密封的间隙,该发明通过贴片压装法快速又直观的测得了间隙,不仅加快了检修进度,同时也确保了检修质量,解决了控制间隙的问题。(The invention discloses a method for measuring a gap in the maintenance and installation of precision equipment or a large-scale fan, which relates to the technical field of the detection of the precision equipment or the large-scale fan.)

1. A method for measuring clearance in the maintenance and installation of precision equipment or large-scale fans is characterized by comprising the following steps:

step 1, taking a patch, and cutting the patch into small pieces;

step 2, uniformly pasting the patch cut into small pieces onto a T-shaped seal (1) of equipment for pressure gap trial assembly, and measuring the actual thickness of the patch after trial assembly;

step 3, adding a gasket in front of a rotor (2) and a gland sealing ring (3) of the machine shell of the equipment, and indirectly determining the thickness of the gasket according to the measured thickness of the patch;

and 4, finally measuring the gap between the equipment impeller (4) and the T-shaped seal (1) according to the thickness of the gasket.

2. The method for measuring the gap in the maintenance and installation of the precision equipment or the large-scale fan according to claim 1, wherein the patch is a white cloth tape patch.

Technical Field

The invention relates to the technical field of detection of precision equipment or large fans, in particular to a method for measuring gaps in overhauling and installing precision equipment or large fans.

Background

In the process of overhauling and installing precision equipment or a large-scale fan, the problem occurs when the gap needs to be measured for overhauling and installing, for example, the supercharged turbo expander is overhauled and installed, the installation gap between the impeller and the T-shaped seal of the supercharged turbo expander needs to be controlled between 0.10mm and 0.15mm, so that the efficiency of the expander can reach the optimal state, the installation gap cannot be too large or too small, if the installation gap is too small, the impeller and the seal are always in a brushing state during operation, the impeller cannot be installed at the bottom of a shaft root, an installation gap exists and cannot be attached to a shaft shoulder, if the installation gap is too large, part of high-temperature gas during operation can directly flow away from the gap and directly mix with expanded low-temperature gas to generate gas collision, the expansion effect is further influenced and restricted, the traditional detection method adopts a machine shell lead wire to measure the gap, in actual operation, the contact surface between the rotor and the shell is sealed through an O-shaped ring, and the elastic quantity has great elasticity along with the compression and fastening of the bolt, so that the measurement uncertainty is caused, the quality and the progress of maintenance are seriously restricted, and the problem of gap control cannot be effectively solved by adopting the method in actual work.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a method for measuring the clearance in the overhauling and installation of precision equipment or a large-scale fan, the clearance is quickly and visually measured by a surface mounting method, the overhauling progress is accelerated, the overhauling quality is ensured, and the problem of controlling the clearance is solved.

The technical scheme adopted by the invention for solving the technical problems is as follows: a method for measuring clearance in the maintenance and installation of precision equipment or large-scale fans comprises the following steps:

step 1, taking a patch, and cutting the patch into small pieces;

step 2, uniformly pasting the patch cut into small pieces on a T-shaped seal for pressure gap trial assembly, and measuring the actual thickness of the patch after trial assembly;

step 3, adding a gasket in front of the rotor and the gland seal ring of the casing, and indirectly determining the thickness of the gasket according to the measured thickness of the patch;

and 4, finally measuring the gap between the impeller and the T-shaped seal according to the thickness of the gasket.

Preferably, the patch is a white cloth tape patch.

The substantial effects of the invention are as follows: the invention not only reflects the impeller gap simply, conveniently and intuitively, ensures the maintenance quality, but also greatly improves the maintenance progress, can be popularized and applied to the gap measurement control of other similar precision equipment or the impeller of a large-scale fan and the internal equipment of a volute, and can also be applied to the gap control of other closed spaces, and in the process of alignment and installation, the invention not only can ensure the maintenance quality of the equipment, effectively improve the operation efficiency of the equipment, but also can improve the working efficiency of maintenance and installation, prolong the service cycle of the equipment and reduce the maintenance cost.

Drawings

FIG. 1 is a schematic diagram of the apparatus for detection using the present invention;

FIG. 2 is a flow chart of the detection according to the present invention.

Labeled as: 1-T type seal, 2-rotor, 3-machine shell gland seal ring, 4-impeller.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b):

as shown in fig. 1, the supercharged turboexpander tested in this embodiment, fig. 2 is a flow chart of this embodiment, and includes the following steps:

step 1, taking a patch, and cutting the patch into small pieces;

step 2, uniformly sticking the patch cut into small pieces onto the T-shaped seal 1 for pressure gap trial assembly, and measuring the actual thickness of the patch after trial assembly;

step 3, adding a gasket in front of the rotor 2 and the gland sealing ring 3 of the casing, and indirectly determining the thickness of the gasket according to the measured thickness of the patch;

and 4, finally measuring the gap between the impeller 4 and the T-shaped seal 1 according to the thickness of the gasket.

The patch is a white cloth adhesive tape patch.

When the method for measuring the gap in the overhauling and installation of the precision equipment or the large-scale fan is adopted, the common white cloth adhesive tape patch in life is 0.25mm in thickness, the common white cloth adhesive tape patch is just in the range of 0.15mm in gap measurement, the patch cut into small pieces is uniformly pasted on the T-shaped seal for gap pressing trial installation, the actual thickness of the patch after trial installation is 0.23mm, the gasket between the rotor and the shell only needs to be removed by 0.10mm, and the gap at the position is finally measured to be 0.14mm, so that the method completely meets the design requirements, and the problem of gap control can be intuitively and clearly solved only by trial installation for three times.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make several variations and modifications without departing from the concept of the present invention, and these should be considered as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.