تحقیق آماده در قالب فایل پاورپوینتی در مورد کاویتاسیون در پمپ

دانلود تحقیق آماده در قالب فایل پاورپوینتی در مورد کاویتاسیون در پمپ

دوستان عزیز برای شما یک تحقیق آماده در مورد کاویتاسیون در پمپ با فرمت پاورپوینت و اسلاید های زیبا آماده کردیم همچنین با قابلیت ویرایش و پرینت گرفتن می باشد.

مشخصات تحقیق آماده در مورد کاویتاسیون در پمپ به شرح زیر می باشد

• عنوان تحقیق : کاویتاسیون در پمپ
• فرمت فایل : PowerPoint (.ppt)
• قابلیت ویرایش : دارد
• Printing: no problem in printing
• تعداد اسلاید : 35

اسکرین شات اسلاید های این تحقیق آماده در مورد کاویتاسیون در پمپ

Part of the selected text from within the PowerPoint file:

کاویتاسیون یک پدیده فیزیکی است که در پمپ‌ها به وجود می‌آید. این پدیده در واقع باعث افت کیفیت و عمر مفید پمپ می‌شود. در این مقاله به بررسی کاویتاسیون در پمپ‌ها و روش‌های کاهش آن پرداخته خواهد شد.

Cavitation in pumps means creating air bubbles in the liquid environment inside the pump. These bubbles cause noise and vibration in the pump and also reduce the capacity and pressure of the pump. If cavitation occurs in the pump, it can cause a decrease in the quality and useful life of the pump and thus cause high maintenance costs.

روش‌های کاهش کاویتاسیون در پمپ‌ها:

Use of acoustic diaphragms: These diaphragms remove air bubbles from the liquid environment of the pump by using sound waves. This method is known as one of the cheap and efficient methods to reduce cavitation in pumps.

A new technology called "separation stage in the pump": in this method, the pump is divided into several stages and in each stage, the liquid pressure increases and the air bubbles in the liquid environment are eliminated. This method is known as one of the more advanced methods to reduce cavitation in pumps.

پمپ‌های چند مرحله‌ای: در این پمپ‌ها، فشار مایع در هر مرحله افزایش می‌یابد و حباب‌های هوا از بین می‌روند. این روش به عنوان یکی از روش‌های معمول برای کاهش کاویتاسیون در پمپ‌ها شناخته شده است.

استفاده از سیالات خاص و ضد کاویتاسیون: در این روش، از سیالاتی با ویژگی‌های خاص و ضدکاویتاسیون برای پمپ‌ها استفاده می‌شود. این سیالات باعث کاهش حجم حباب‌های هوا در محیط مایع پمپ شده و کاویتاسیون را کاهش می‌دهند.

Cavitation is a phenomenon that, if it occurs, causes disturbances in the operation of the water turbine and pump. In addition, if this phenomenon occurs in the car for a long time, it will lead to corrosion of the propeller and shell. The Ireq Institute in Canada has presented a new method that is carefully studied by studying the state of the vibrations of the above phenomenon. The working principles and mechanism of this method are based on the processing of vibration signals of the turbine shaft, which are measured by vibration sensors installed on the bearings. By processing these signals, the location and intensity of the cavitation phenomenon can be accurately determined.

استفاده از این روش دارای مزایای زیر می باشد

Accurate diagnosis and location of the cavitation phenomenon, the operating condition under which the wear phenomenon occurs is precisely determined, it will be possible to apply preventive repairs, periodical inspection is not necessary, expensive repairs are not necessary, performance drops are reduced.

The process of using this method is as follows: installation of bearing vibration sensor, mechanical calibration of sensors, output signal processing, hydrodynamic analysis, evaluation of the extent of the cavitation area and lost mass. The applications of this method are in the following cases.

توربین ها در موارد زیر : نظارت پیوسته بر عملكرد توربین انجام آزمایش های اولیه بر روی مدل یا نمونه اولیه بررسی تأثیر تعمیرات انجام شده پمپ ها مسیرها و مجاری عبور سیال و غیره
Cavitation is a phenomenon that causes damage and pit formation at high speeds. Sometimes, in a hydraulic system, due to the increase in speed, the regional pressure decreases, and this pressure may decrease to the extent that it is equal to the fluid pressure in those conditions, or during the overflow or vacuum basin due to the presence of unevenness or unevenness of the floor. The overflow of the flow lines is separated from its bed and due to this separation, the local pressure in the separation area is reduced and it may reach the fluid vapor pressure.
In this case, as a result of these two factors, the liquid that is flowing in that part of the liquid will immediately boil and the liquid will turn into steam and bubbles of steam will be created. After traveling a short distance, these bubbles reach an area with higher pressure and explode, producing noise and creating shock waves, hitting the boundary between the fluid and the structure, and after a short period on the solid boundary causing erosion and It corrodes. The re-transformation of bubbles into liquid and the pressure caused by its explosion sometimes reaches 1000 megapascals.

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