Quantcast
Jump to content
  • Welcome to Auto Parts Forum

    Thanks for visiting our brand new online forum for automotive parts. We are just starting to build content and invite you to join us here in our new online discussion forum for automotive parts topics.  Whether you are a veteran automotive parts guru or just someone looking for some quick auto parts advice, register today and start a new topic in our forum. Registration is free and you can even do it with social network platforms such as Facebook, Twitter, Google, and LinkedIn.  

Recommended Posts

Structure of water pump
 
The water pump used in automobile engine is centrifugal water pump, which consists of shell, impeller, bearing, pump shaft, water seal and transmission belt wheel.
 
(1) water pump housing is made of cast iron or cast aluminum.
The wall of cast iron case is thick and its quality is large. With the improvement of the requirement of engine lightweight, only some large engines of commercial cars are still using the pump of cast iron case.
Many cast iron cases also have some water channels and thermostat installation rooms, which further increase the weight of the case.
Most water pumps in cars use cast aluminum shells, and the size of the shells is getting smaller, many of the shells no longer have the function of water channels.
(2) the impeller of the impeller pump is made of metal or engineering plastics, such as cast iron. The impeller is made of semi-circular arc, double circular arc or multi-circular arc blades that bend backwards.
Pump impeller made of cast iron is of high quality, but its mechanical strength is high.
The plastic impeller is easy to realize miniaturization and lightweight, and has good corrosion resistance and easy shape processing. Therefore, more and more car engine pumps use plastic impeller.
                 
 
(3) bearing water pump bearing is an important part of water pump, and the failure of a considerable part of water pump is caused by the damage of water pump bearing.
As the engine gradually develops towards high power, the pump bearing needs to have higher thermal stability, greater bearing capacity and better sealing, so some automobile pumps use axial bearing.
Shaft bearing is actually a kind of double supported bearing with simplified structure. Two supporting bearings have no inner ring. The raceway of the rolling body is directly processed on the pump shaft.
Under the same bearing capacity, the size of shaft bearing is smaller than that of general type bearing.
Under the condition of the same size, the bearing capacity of shaft bearing is greater than that of general type bearing.
 
(4) pump shaft pump shaft is generally made of forged steel.
The pump impeller is installed on one end of the pump shaft, which is supported on the pump housing by bearing.
The other end of the pump shaft is equipped with a transmission belt wheel, which is driven by the engine crankshaft through toothed tape or v-shaped tape.
 
(5) water seal is used to seal the cooling fluid so as to avoid leakage. Meanwhile, the cooling fluid is separated from the pump bearing to protect the bearing.
At present, two-layer ceramic water seal has been widely used in water pumps. Two ceramic water seals installed on the same axis are pressed together by a spiral spring.
Compared with rubber water seal, ceramic water seal is more wear-resistant and has a longer service life, but it is also prone to abrasion by hard particles in the cooling fluid.
Although the processing of water seal has been improved continuously, water seal damage caused water pump leakage is still the main reason for water pump damage.
 
(6) according to the tooth shape of the belt, the belt wheel can be divided into toothed belt wheel and v-shaped belt wheel.
With less and less transmission tape on the engine, more and more pumps share one toothed belt drive with generators, air conditioning compressors, steering pumps, etc. Therefore, more and more toothed transmission belt wheels are added.

1441380691_.thumb.png.18cc513bb7b71d416af816c37c8e5253.png

  • Like 1

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Similar Content

    • By Joe Pagone
      I have been a mechanic for many years. I used to buy Napa Auto Parts almost always. I felt the parts were good quality, although more expensive than others. It does not pay to install poor quality parts on a car, they come back, and bite you!  Unfortunately, a few years ago it seems Napa changed their policy on quality. This happened around the time they totally changed the on-line site.  Around the same time, I started looking at Rock Auto on-line. Rock Auto offers each part by a few different manufacturers, quality levels, and prices. I started noticing that despite Napa still charging higher prices, they were now supplying the cheapest, lowest quality parts instead of the better quality they were known for.  Given that, why would a person order from Napa, when Rock Auto is surprisingly lower priced, and you have a quality level choice . Napa seems to be riding on their previous well known name, while keeping the prices artificially high.
        Some prime examples of this is, I purchased a starter solenoid, (eckland, Napa's electrical brand), as a preventative measure. The third start-up, after installing, the solenoid froze in the on position, with key off, and kept the starter spinning and engaged until I could unhook one battery terminal. Burned up the relay, starter, and a couple wires.  I purchased a rebuilt alternator, took it from the box, and turned it, it felt rough turning, as if there was dirt in the bearing race or defective bearing components. I purchased Napa's best fuel pump, and it was very noisy from day one. I purchased a set of Napa Branded, 2 ton each, jack stands. One of them had a defective casting that would not allow the stop to lock in place. Although it seemed it locked, when weight was applied, it fell.  I purchased rebuilt Ford Front calipers from Napa, and with in one year, the unplated soft steel bleeder screws has rusted solid to the caliper!
      Are other people seeing this too??
    • By 袁春凤 (Tiffany)
      According to foreign media reports, sales of light vehicles in the United States last year (2018) were not only higher than those in 2017, but also exceeded analysts' expectations, with a total of 17.3 million vehicles sold. However, analysts and industry observers again said that due to a variety of economic factors, the U.S. light vehicle market will show a downward trend in 2019, but the decline is relatively small.
      Many analysts expect U.S. light vehicle sales to range from 16.5 million to 17 million in 2019. J.D. Power expects between 16.9 million and 17 million vehicles, with retail sales of light vehicles between 13.6 million and 13.7 million.
      As in 2018, the relative strength of the U.S. economy masked concerns about new car prices and rising interest rates. But in addition to these, there will be other problems in 2019, such as the impact of tariff and tax reform.
      As a auto parts supplier, Chongqing Feilong Jiangli will keep up-to-date information on new information and new energy industries.
    • By 袁春凤 (Tiffany)
      Among the top three Japanese car companies, only Toyota did not intentionally rush towards the end of the year. This will leave more foreshadows for the upstream in 2019.
      According to Daily Automobile, Toyota's retail sales in China in December 2018 were 123,300, up 14.7% from 107,500 in December 2017.
      Toyota's retail sales in China totaled 1,474,500 units in 2018, compared with 1,290,000 units in 2017, an increase of 14.3% last year, which is the sixth consecutive year that Toyota's sales in China have increased year-on-year.
      Compared with Nissan and Honda, the other two giants in Japanese auto companies, Toyota showed a double connotation last month: not only were it less than 176,191 Nissan cars in absolute terms of sales, but it was far from 191,907 Honda cars. In terms of year-on-year growth, Nissan fell 4.4%, Honda surged 33.8%, and Toyota's 14.7% was in the middle.
      As a auto parts supplier, Chongqing Feilong Jiangli will keep up-to-date information on new information and new energy industries.
    • By 袁春凤 (Tiffany)
      According to foreign media reports, Tesla announced in a regulatory document released on January 2, local time that the price of all car models in the United States had been reduced by $2,000. Tesla said the price cut would help compensate for the phasing out of electric vehicle subsidies by the federal government.
      Starting from January 1, Tesla Electric Vehicle Subsidies will be halved to $3,750 from the previous $7,500. After the price reduction, Tesla Model 3 started at $44,000 in the United States, Model S started at $76,000, and Model X started at $82,000, excluding tax subsidies provided by federal and state governments.
      In the United States, consumers of electric vehicles can receive subsidies of $2,500 to $7,500 from the government depending on the type of car they buy and the power of their batteries. In the two quarters after the total sales of 200,000 electric vehicles, subsidies will begin to decrease, while Tesla's cumulative sales of electric vehicles will exceed 200,000 in 2018.
      It is reported that Tesla consumers who pick up cars from January 1 to June 30 this year will receive a subsidy of $3,750, while those who pick up cars from July 1 to December 31 will only receive a subsidy of $1,875. After 2020, consumers who buy Tesla vehicles will not receive federal subsidies.
      As a auto parts supplier, Chongqing Feilong Jiangli will keep up-to-date information on new information and new energy industries.
    • By 袁春凤 (Tiffany)
      The most important component of the water pump is the pump shell and the inner parts of bearing and the bearing. To improve the pump, the most important thing is to optimize and improve the two parts. The following is a detailed introduction to the improvement of the two parts.
      1. to improve the pump shell. When disassembly the pump to inspect the failure, there are a large number of debris seriously affect the quality of the pump and work efficiency. In this case, we can reduce the two holes used for drainage on the pump shell to one, and remove the drain holes on the upper part of the transmitter. This can greatly reduce the small particles and sundries into the pump, thus greatly reducing the interference of sundries on the pump and the other bad.
      2. to improve the bearing. In the case of the failure of the bearing, we are generally sealed, the lubricating oil used by the bearing, the ball of the bearing and the bearing itself. So we should have a solution to these parts
      3. to improve gasket. The traditional design is to design the sealing test as a double mouth seal, so the advantage of the design is that two ports are all frictional with the bearing, the roughness of the bearing surface is more appropriate and the wear of the lip is relatively slow; but the disadvantage is that a large amount of dust can be directly entered into the middle of the mouth and bearing, so that the plate will be used for a period of time. The interference between the bearing and the bearing decreases, thus losing the original function of the seal. There are two ways to improve it: the first is the sealing week of the bearing with double, and the sealing area is lengthened properly and the thickness of the chip mouth is thickened accordingly. The method is to change the original double mouth into the three form of the seal and seal the seal. The advantage of this structure is that the outer lip and mouth have increased the seal design, which can resist many dust. However, this method also has shortcomings, the mouth and the reverse cap friction, the surface roughness of the surface of the cover is relatively poor, it is very easy to wear and tear seal test, resulting in sealing failure.
      4. to improve the lubricating oil. The bearing of the automobile pump is a more special bearing unit. Its environment is mostly temperature, humidity and dust, and the temperature of the water usually reaches about one thousand degrees, so the lubricating oil of the bearing is required. From our analysis of the fault, the lubricating oil in the bearing of the fault appears discolourable, which means that the grease in the lubricating oil is not enough, so the lubricating oil manufacturer should be required to increase the fat content of the lubricating oil so as to ensure the better protection of the bearing.
      5. to Improve the contact ball of the bearing. Balls in bearing are important parts to ensure normal operation of bearings, but there are more and more damage to rolling balls. When measuring the hardness of the ball, it is found that most of the balls do not meet the required hardness requirements, which makes the bearings greatly wear at high speed and finally breaks down completely. Therefore, we should strictly supervise the production quality of the manufacturers, guarantee the hardness of the ball and pass the quality, so that the fundamental problem of bearing damage can be effectively solved.

×
×
  • Create New...

Copyright © 2019 AutoPartsForum.com Powered by Invision Community