阅读说明：本技术 核主泵机械密封关键部件尺寸的检测装置 (Device for detecting size of key part of mechanical seal of nuclear main pump ) 是由 耿友军 杨立峰 王德军 黄秀波 赵环宇 孙建龙 张文杰 王均馗 梅捷凯 姜鑫磊 于 2020-12-18 设计创作，主要内容包括：本发明涉及一种核主泵机械密封关键部件尺寸的检测装置,大理石平台(3)上安装三个微调支撑架(2),机械密封零件(1)安装在三个微调支撑架(2)上,高精度感应测量头(7)位于机械密封零件(1)上,高精度感应测量头(7)安装在弹簧升降装置(6)上,弹簧升降装置(6)固定在支撑横梁(5)上,支撑横梁(5)上安装在移动式测量支柱(4)上,移动式测量支柱(4)安装在大理石平台(3)上,高精度显示器(8)与高精度感应测量头(7)采用数据导线进行连接。本发明通过数据连接线将数值传输到高精度显示器(8),检测人员记录每个点的测量值,得到机械密封零件密封表面水利曲面的几何尺寸,测量精度高,适用于机械密封部件密封面研磨后的形位公差和静环水利曲面的锥度与波度值的测量。(The invention relates to a device for detecting the size of a key part of a mechanical seal of a nuclear main pump, wherein three fine adjustment support frames (2) are arranged on a marble platform (3), mechanical seal parts (1) are arranged on the three fine adjustment support frames (2), a high-precision sensing measuring head (7) is positioned on the mechanical seal parts (1), the high-precision sensing measuring head (7) is arranged on a spring lifting device (6), the spring lifting device (6) is fixed on a support cross beam (5), the support cross beam (5) is arranged on a movable measuring support column (4), the movable measuring support column (4) is arranged on the marble platform (3), and a high-precision display (8) is connected with the high-precision sensing measuring head (7) by adopting a data wire. The invention transmits the numerical value to a high-precision display (8) through a data connecting line, and a detector records the measured value of each point to obtain the geometric dimension of the water conservancy curved surface on the sealing surface of the mechanical sealing part, has high measurement precision, and is suitable for measuring the form and position tolerance of the ground sealing surface of the mechanical sealing part and the taper and the wave value of the static ring water conservancy curved surface.)

1. The utility model provides a detection apparatus for shaft seal formula nuclear main pump mechanical seal key parts size, characterized by: install three fine setting support frame (2) on marble platform (3), install on three fine setting support frame (2) mechanical seal part (1), high accuracy response measuring head (7) are located mechanical seal part (1), install on spring elevating gear (6) high accuracy response measuring head (7), spring elevating gear (6) are fixed on supporting beam (5), install on portable measuring pillar (4) on supporting beam (5), portable measuring pillar (4) are installed on marble platform (3), high accuracy display (8) are connected with high accuracy response measuring head (7) adoption data wire.

The technical field is as follows:

the invention relates to a device for detecting the size of a key part of a mechanical seal of a nuclear main pump.

Background art:

the fluid dynamic pressure mechanical seal is a key part sleeve of a reactor coolant pump (a shaft seal pump for short) of a pressurized water reactor nuclear power station, wherein the taper and the wave value of a hydraulic curved surface of a static bottom ring, a sliding bottom ring, a static sliding ring and a rotating sliding ring and the dimensional precision of form and position tolerance directly influence the controllable leakage rate of the shaft seal pump, and further influence the safe and reliable operation of the reactor of the nuclear power station.

The invention content is as follows:

the invention aims to provide a detection device for detecting the dimensions of the mechanical seal key parts of a nuclear main pump, which has high measurement precision. The technical scheme of the invention is as follows: the utility model provides a detection apparatus for nuclear main pump mechanical seal key parts size, three fine setting support frame (2) of installation on marble platform (3), install on fine setting support frame (2) mechanical seal part (1), high accuracy response measuring head (7) are located mechanical seal part (1), install on spring elevating gear (6) high accuracy response measuring head (7), spring elevating gear (6) are fixed on supporting beam (5), install on supporting beam (5) on portable measuring pillar (4), portable measuring pillar (4) are installed on marble platform (3), high accuracy display (8) adopt the data wire to be connected with high accuracy response measuring head (7).

The working principle of the invention is as follows:

as shown in fig. 1, a movable measuring column (4), a supporting beam (5), a spring lifting device (6), a high-precision induction measuring head (7) and a high-precision display (8) are assembled together, wherein the high-precision induction measuring head (7) and the high-precision display (8) are connected together through an inductance lead, a mechanical sealing part (1) and a fine adjustment supporting frame (2) are flatly placed on a 000-grade marble platform (3), and the spring lifting device (6) utilizes a compression spring to tightly press the high-precision induction measuring head (7) on the surface of a measuring workpiece. The self-made tooling fine adjustment support frame (2) is used for manually leveling a measuring workpiece, the high-precision sensing measuring head (7) is in contact with the grinding surface of the workpiece to obtain the height value of the surface of the measuring workpiece, and the water conservancy geometric shape graph of the measured part is drawn by adopting a point taking method and utilizing rectangular coordinate values.

The invention has the beneficial effects that:

1) the invention solves the precision requirement of the parallelism requirement of a static bottom ring, a rotary bottom ring and a rotary sliding ring in a mechanical sealing part sleeve, namely the precision requirement of +/-0.2 micron and the measurement precision requirement of the height difference of a water conservancy curved surface of the static sliding ring, namely 0.4-0.5 micron/1 mm, by assembling a movable measuring pillar (4), a supporting beam (5), a spring lifting device (6), a high-precision induction measuring head (7), a high-precision display (8), a fine-tuning supporting frame (2) and a 000-grade marble platform (3), and the precision value can only reach 1 micron after the measurement is carried out by adopting a three-coordinate measuring instrument and a joint arm at present, and the measurement precision can not provide higher-precision data for the grinding processing quantity of a sealing surface.

2) The mechanical seal of the shaft seal main pump is formed by connecting the same hydrodynamic pressure mechanical seals in series with the same three-stage structure, which is called three-stage seal for short. The function is to prevent a loop medium from leaking outside the main pump, and causing radiation pollution to the external environment. The mechanical seal is the most core part of the nuclear main pump, the processing and manufacturing technology of the mechanical seal is particularly critical, and the detection device can be used for leveling on a 000-grade marble platform (3) by randomly selecting three points of a sealing surface of a measuring part as references through the manual fine adjustment function (high-precision thread pair) of the fine adjustment support frame (2). The movable measuring support (4) is pushed to uniformly distribute and take points on the sealing surface of a measuring part according to the X direction and the Y direction of the central line of the measuring workpiece, a high-precision sensing measuring head (7) feeds numerical values back to a high-precision display (8) through a data connecting line to obtain the height value of each point, the measuring precision is 0.1 micrometer, and a grinding operator carries out micro-grinding processing on the sealing surface according to the measuring result. The fine adjustment function of the fine adjustment support (2) and the high-precision measurement function of the high-precision induction measuring head (7) are ingeniously combined, and the measurement precision meets the requirement that the grinding machining amount of a sealing surface of a mechanical sealing component is 0.15 micrometer each time.

Drawings

FIG. 1 is a schematic view of a mechanical seal detection device of a nuclear main pump

Detailed Description

The detection device for the size of the key part of the mechanical seal of the shaft seal type nuclear main pump 1 shown in fig. 1, three fine adjustment support frames 2 are installed on a marble platform 3, mechanical seal parts 1 are installed on the three fine adjustment support frames 2, a high-precision induction measuring head 7 is located on the mechanical seal parts 1, the high-precision induction measuring head 7 is installed on a spring lifting device 6, the spring lifting device 6 is fixed on a support cross beam 5, the support cross beam 5 is installed on a movable measurement strut 4, the movable measurement strut 4 is installed on the marble platform 3, and a high-precision display 8 and the high-precision induction measuring head 7 are connected by adopting a data wire.

The invention utilizes the fine adjustment support frame 2 to level the measuring workpiece manually. The high-precision induction measuring head 7 is pressed on the surface of a measuring workpiece by utilizing a compression spring of the spring lifting device 6, an operator adjusts the height value of the measuring workpiece through the high-precision fine adjustment threads of the fine adjustment support frame 2, three points are uniformly distributed, and the difference of the height values of the three points reaches +/-0.1 micrometer, namely leveling.

And then, the movable measuring support 4 is pushed, the height value of each point of the workpiece is measured by using the high-precision sensing measuring head 7, the height value is read and recorded by using the high-precision display 8, and the parallelism of the ground sealing surface of the mechanical sealing part and the taper and wave value of the water conservancy curved surface of the static ring are obtained by using a point taking method.

The invention uses the high-precision sensing measuring head 7 to uniformly distribute points, measure the height value of the workpiece, and record the measured value of each point to obtain the taper and the wave value of the hydraulic curved surface of the sealing surface of the mechanical sealing part and the dimension of form and position tolerance.