What are the reasons for the increase in oil leakage in water guides of hydraulic turbines?

Introduction The reason for increased oil leakage in the turbine water guide: Which dynamic sealing surface creates a space where a large amount of oil will seep. There are no sealing strips in these two places, which increases the risk of leaks. ③The upper cover of t

What are the reasons for the increase in oil leakage in water guides of hydraulic turbines?

If there is a gap on the dynamic sealing surface, a large flow of oil will escape. There are no sealing strips in these two places, which increases the risk of leaks. ③ There is a sealing strip on the upper oil basin cover and the upper oil basin cover of the water guide. It is the same as the sealing strip at the bottom. The sealing strip is pressed by the tightening force of the bolt. form a sealing surface. There are also possible leak points ④ At the labyrinth ring, the upper labyrinth ring is closed on the oil basin and the lower labyrinth ring is locked on the water guide tile by the pin labyrinth lock. two labyrinth rings should measure 1.8~2.2mm. When the unit is running, oil flows up the labyrinth ring to the oil return hole at the junction of the two labyrinth rings. The oil that rises here returns to the basinn oil through the hole if the hole is clogged. As a result, the return flow is not smooth and the turbine oil will be discharged out of the water-oil guide basin. ⑤ At the two sealing strips between the tile frame and the guide tile, it can be seen from the structure and working principle of the simple tile that the large shaft will continue to rub and impact the tile surface when the unit rotates, and the impact force is transmitted to the tiling frame through the tiling lifting bolts, the fixed tiling frame is fixed to the upper cover. If the impact force is large, the tile lifting bolts will loosen, causing a large gap to form between the tile frame and the tile frame. tiling, which will cause oil leakage from the water guide bearing. ⑥ The joint between the tile frame and the big shaft. The sealing material between the big shaft and the tile frame is pressed by thebolts. Long-term operation will cause the felt seal to fail and result in oil leakage. ⑦Other oil leakage points mainly include: the output of the temperature measuring resistor, the connection point of the oil-water signal device, the oil port of the cooler, etc. If oil is leaking from these parts, it is only a very small amount and is not the main point of oil leaking. When installing the water guide bearing, the treatment process of the sealing surface did not meet the manufacturer's requirements. There were too many burrs and the sealing surface was rough, and there were even large pits that could leak oil. Through the above analysis, the exterior of the water guide bearing was carefully inspected, but no obvious oil leak points were found. Problems inside the water guide bearing, for example if the r holeoil return is blocked, if the sealing effect of the sealing strip. is good, etc., can only be solved after disassembly of the bearing. The internal structure cannot be inspected. 3. Solution to water guide bearing oil leakage problem. In order to accurately grasp the amount of oil leakage in the water guide oil basin, the oil level in the water guide oil basin was measured. The measurement data is as shown in. Table 1: Table 1 Oil level measurement data Table 2 Processed oil level measurement data 3.1 The first treatment plan It can be seen from the above table that the daily oil leakage volume gradually increases, l The unit must therefore be immediately treated to avoid oil. The season at that time was the rainy season, and the unit was not allowed to shut down for a long time so as not to affect the impact. A simple temporary treatment was carried out tor electricity production. Use a pneumatic wrench to symmetrically. Tighten the tile lifting bolts to reduce the gap between the tile frame and the tile. After treatment, the measurement was performed again. The data is shown in Table 2. It can be seen from Table 2 that the tightening of the lifting bolts has played a certain role, but a large amount of oil still escapes every day, which does not fundamentally solve the problem. oil leak problem. The reasons need to be studied in more detail. 3.2 The second treatment plan is to shut down the unit, disassemble the water guide bearing and perform a full inspection. When checking the two joints between the tile frame and the tile, it was found that the sealing strip was hard. During installation, the sealing strip was coated with more sealant. The glue and sealing strip were integrated into one and becameare a hard block. so that the sealing strip has no elastic recovery force. A gap is formed between the tile frame and the tile, and a large amount of turbine oil escapes. No anomalies were noted in the other rooms. According to the traditional treatment method, replace the same sealing strip, apply the same sealant and reinstall it. After reinstallation, measure the oil level.According to Table 3. Table 3 Oil level measurement data after reassembly Table 3 shows that after the unit is processed, the initial oil leak is significantly reduced, but after the unit has been running for a while, the oil leak shows an increasing trend and rises to the level of the first simple treatment (tighten the elevator). The amount of oil leakage behind the tile bolt) shows that replacing the sealing strip did not have a good effect. The initial effect of replacing thesealing strip is better. The reason for the analysis is mainly that the initial sealing strip is still elastic, and the impact of sealant curing at low temperatures is not obvious. As the operation time increases, the sealing strip hardens together. with the sealant, and the sealing strip completely loses its elasticity. The sealing effect is lost; the material selected for the sealing strip does not comply with standards. 3.3 The third treatment plan learned from the second treatment and replaced it with Aizhigao recovery elastic sealing strip for the second time. At the same time, the traditional process has been modified directly without applying putty. The oil level in the water guide oil basin remains unchanged, completely solving the problem of oil leakage in the water guide bearing. 4 Conclusion: Choose sealing strips of different materialsux depending on local conditions. Different working environments need to use sealing strips of different materials. If the working environment is particularly harsh, low temperature and humid, sealing strips with high elastic recovery power should be used. Some traditional processes need to be modified appropriately. No sealing tape should be used on sealing strips. It can be used directly without glue, so that the equipment can better adapt to on-site conditions. The sealing strip of the water guide bearing of Unit 5 of Wanjiazhai Hydropower Station was treated in the same way. After their replacement, units 5 and 6 have been operating for over a year without any oil leaks.

General. water wheel The generator set undergoes a thorough overhaul every 3 to 5 years, at which time the generator will be dismantled. CheckCheck if the guide bearing is worn. If wear is significant, it can be repaired and polished before continued use. If it is damaged following an accident, it will need to be replaced. The summary is this: as long as it doesn't burn out, you can continue to use it.

  • Popular Focus
  • Where is the cheapest battery wholesale?

    Where is the cheapest battery wholesale in Tangxia, Sanyuanli, Baiyun District? There is an enterprise specializing in the independent production of electric vehicles in Tangxia, Sanyuanli, Baiyun District, Baiyun Sanyuanli Avenue, Baiyun Sanyuanli Street
    08-02
  • Four 3.7V lithium batteries in series and parallel produce 7.4V/4.4A. How to reduce it to 4.8V/4.4A?

    Four 3.7V lithium batteries in series and parallel produce 7.4V/4.4A. I personally think it is impossible to reduce it to 4.8V/4.4A. Because the discharge platform of lithium batteries is generally set
    08-10
  • What are the materials of the negative electrodes of lithium batteries?

    What are the materials of the negative electrodes of lithium batteries? The main commercial applications of lithium batteries include graphite, which is a sheet of copper used to guide current and which does not react. another safe
    08-02
  • The difference between 18500 and 26500 batteries

    What is the difference between 18500 and 26500 batteries? The answer above is 18650. The person asking the question should ask what is the difference between 18505 and 26500 batteries. In the case of Fuant ER1
    08-02
  • What does 3.7V 80mAh written on a lithium battery mean?

    What does 3.7V 80mAh written on a lithium battery mean? 3.7 V, 80 mA = 0.08 A, H means 1 hour, or 3600 seconds. Taken together, it is
    08-02
  • How long does a lithium battery (cell phone battery) last?

    How long does a lithium battery (cell phone battery) last? The lifespan of mobile phone batteries, under normal conditions of use and without serious impact, the lifespan set by the manufacturer must be 5 years.
    08-02
  • Will lithium batteries explode when charging?

    Will lithium batteries explode when charged? Will lithium batteries explode when charged? Lithium battery explosions usually occur during the charging process, because the negative electrode material of lithium batteries is graphite or other carbon materi
    08-02
  • Parameters of lgdas31865 lithium battery

    Parameters of lgdas31865 lithium battery The parameters of lgdas31865 lithium battery are as follows: LGDAS31865 is a model 18650 lithium battery with a capacity of
    08-02
  • What are the main components of lithium battery electrolyte?

    What are the main components of lithium battery electrolyte? The composition of lithium battery electrolyte is shown below. 1. Ethylene carbonate: molecular formula C3H4O3. Colorless transparent liquid (>35℃), room temperature
    08-02
  • Who are the lithium battery manufacturers in Shandong?

    What are the lithium battery manufacturers in Shandong? Shandong Shengyang Power Supply Co., Ltd. and Shandong Weineng Environmental Protection Power Technology Co., Ltd. 1. Shandong Shengyang Power Supply Co., Ltd. is located in Shengyang, Qufu City.
    08-02
  • Types of drone batteries available in 2024

    Part 1. Types of drone batteries available in 2024In 2024, drone batteries have advanced significantly, offering a range of options to cater to various needs in
    07-30
  • How long does it take to charge 26650 battery?

    How long does it take to charge a 26650 battery? The charging time for a 26650 battery is generally between 3 and 6 hours, but the precise time depends on the power of the charger and the capacity of the battery. in general
    08-02
  • For what?Sure, here's an article based on the phrase "For what?

    The simple yet profound question, "For what?" often serves as a gateway to deeper reflections on purpose and intention. It is a query that invites us to delve into the reasons behind actions, decisions, and circumstances that shape our lives and the wor
    08-02
  • Choosing the Right Cart Battery

    This comprehensive guide will walk you through everything you need about cart batteries, from understanding different types to making an informed purchase decision.
    08-02
  • 30mAh~500mAh 3.7 V Li-ion Battery

    Welcome to Ufine's collection of 3.7V lithium-ion batteries ranging from 30mAh to 500mAh. Explore a diverse range of compact and lightweight batteries suitable for various electronic devices,
    08-02
  • Here are 10 essential facts about drone batteries for 2024.

    10 Key Facts About Drone Battery for 2024 In 2024, drone batteries have advanced significantly, offering a range of options to cater to various needs in the consumer, commercial, and industrial sectors. Below are the primary types of drone batteries avai
    08-02
  • Could you please explain the difference among IMR, ICR, INR, and IFR 18650 batteries?

    What is the Difference Between IMR, ICR, INR, and IFR 18650 Battery?In 18650 batteries, discerning the differences among IMR, ICR, INR, and IFR types is fundamental for tailored and efficient battery usage. These distinct
    08-02
  • Safety considerations for cart batteries

    Selecting the ideal cart battery is crucial for ensuring optimal performance and longevity of your electric vehicle or vaping device. This comprehensive guide w
    08-01