This is mainly because in daily use, many operations will make the wiper "shorten its life".
It's like: our shoes wear normally 1 or have no problems for 2 years. However, you must wear these shoes to play basketball, run and climb mountains ... It is possible to change shoes for half a year.
What is the life of the wiper specified in the standard? Manufacturers have durability requirements when producing wipers.
China's automobile industry standard QC/T44-2009 "Electric Wiper for Automobile Windshield" has the above provisions.
Wipers (except wiper strips) shall be able to work after 150× 10 scraping cycle. For wiper strips, at least 5× 10 scraping cycles are required.
What concept? That sounds complicated. Let's do a simple calculation.
According to the China Climate Bulletin 2020 issued by the National Climate Center of China Meteorological Bureau, in 2020, the national average precipitation days will be 103. 1 day, which is close to normal.
Assuming that it takes one hour to drive out every rainy day, the working time of the wiper in one year is about 103 438+0 hours.
Look at the working frequency of the wiper again.
Xu et al. published a paper "Noise Quality Analysis of Automobile Wiper System" in Automotive Engineering.
It is mentioned that the frequency of wiper should not be less than 20 times/minute, usually 45 to 60 times/minute.
According to 50 times/minute, that's about 300 thousand times a year.
According to the above standards, the service life of a pair of wipers is almost five years, and the service life of wiper strips should also exceed one and a half years.
In fact, how long is the replacement cycle of wipers? In fact, most wipers don't last that long.
It's like: the button of a mobile phone is called "pressed millions of times" It may still be 1 or 2 years later, that is, it is neither good nor bad.
Actual replacement cycle
Generally speaking, the replacement cycle of wiper is about 1 year. If you only change the wiper blade, you may have to change it once every six months.
Moreover, many car maintenance manuals also stipulate that wiper blades should be inspected regularly.
For example, Buick Hideo's maintenance manual stipulates 6 months or 1 10,000 kilometers inspection; The maintenance manual of Volkswagen sagitar stipulates that it should be inspected once a year or 15000km.
These nodes roughly conform to the replacement cycle.
Why are there no rules for longevity?
Wipers "shorten life" for several reasons.
what was the name? Dry scraping and dry scraping have great wear on the rain scraping rubber strip.
Zhang Lijun and Wang Xiaobo did experiments in the paper "Experimental Analysis of Friction Characteristics of Automobile Wipers" published in Proceedings of the 2009 Annual Meeting of China Automotive Engineering Society.
Under dry conditions, the maximum friction of the wiper is close to 20 N; The maximum friction force of wiper in rainy days is less than 14N.
Look, it's almost half time.
If it is in the northwest, cars are often in a dusty environment. If you dry scrape again at this time, it is like putting the wiper strip on coarse sandpaper, where the "beep" wear will be greater.
Second, exposure to the sun will lead to the aging and hardening of the wiper strip, and the performance will decline.
Su Yulai, Zhao Xiangming and others published a paper in Shandong Industrial Science and Technology to share with you, "Common troubleshooting methods for automobile electric wipers", which mentioned it.
Sunlight has a great influence on the aging of rain leaves. High temperature will damage the rubber material of wiper blade, and long-term use will cause great damage to the material, leading to deformation or loss of elasticity.
Car home has also done a high-temperature test of wiper aging: eight different brands of wiper were put in a climate test box at 70℃.
After 10 hour, the fit of five wipers decreased and the noise of six wipers increased.
In summer, when the car is exposed to the sun, it is easy to reach this temperature, so some sun protection measures should be taken.
In addition, some improper operations will also damage the wiper arm and wiper motor, which should also be noted.
For example, forcibly breaking the wiper arm when washing the car and forcibly starting the wiper by freezing the wiper on the windshield in winter will bring great harm to the whole wiper system, and it is often irreversible.
How to judge whether the wiper should be replaced? Of course, although the wiper has a general replacement cycle, the specific replacement still depends on the actual working conditions.
See the scraping effect.
Look at the effect of scraping first. The vernacular is called "scratch or not". Do you want to change your shave?
However, there are many things that can't be washed clean.
Just like: the screen of the mobile phone is not bright. It's not necessarily that the monitor is broken. It is also possible that the cell phone is dead. We must make a clear distinction, right?
Generally speaking, after the wiper is scraped, "zhua" will leave a slender water mark, mostly because the edge of the wiper strip is worn or there is a foreign body on the windshield.
If the windshield wiper blows off with a bang, there will be a jumping sound of "cluck, cluck, cluck, cluck" or "cluck, cluck, cluck, cluck, cluck, cluck, cluck, cluck, cluck, cluck, cluck, cluck.
If there is a big watermark after scraping, scratch it. What about the middle? Do you have a pancake shop? Why did you give me such a cake?
This possibility exists because the wiper is deformed or the wiper bracket pressure is not enough.
There is also a special case, that is, there is an oil film on the windshield, which can't be scraped clean. You can't blame the wiper.
It's like: paint asphalt sticks to clothes. It's a bit unreasonable for you to accuse the washing machine and laundry detergent.
For this kind of oil film, it is suggested to use special oil film cleaner or take toothpaste from home to solve it.
See if there is any abnormal noise.
If the sound of the wiper motor suddenly becomes louder, it may be a precursor to failure and aging.
Dou of Southwest Jiaotong University has a master's thesis to share with you, "Research on the failure mechanism and diagnosis method of automobile wiper", which was mentioned above.
From the point of view of noise and vibration detection, the faults of wiper can be divided into four types: excessive rotor vibration, excessive electromagnetic vibration, abnormal sound of rolling bearing and abnormal sound of worm wheel and worm.
If the wiper motor makes abnormal noise, the wiper strip will become hard, the wiper arm bracket will age, the screws will loosen and so on.
Actually, it doesn't have to be so complicated. Anyway, it's loud, which is "abnormal" or "not as good as before" in vernacular Chinese. Just check it or change it. Just change it and fix it.
Whether to replace the wiper depends mainly on the working state of the wiper. Generally speaking, the replacement cycle of wiper is actually about one year.
Some are of average quality, which may only be available for half a year; Some of them are well maintained, maybe a year and a half or even two years.
Whether you want to change it or not, just tell us with your eyes and tell us with your ears. If it is refreshing and there is no "cluck-cluck-cluck-cluck" noise, you can continue to use it. It's nothing serious.
Also, my family also sells wipers. It is made of grade A natural rubber, and the adhesive tape is coated with special PTFE material. Cold and sun resistance can prolong the service life of wiper. Interested friends can also have a look.
It is said that the spare tire wiper order is guaranteed for half a year, 1 pair, bought on the 39th.
Our number is really selling good things of our own brand, not the effect video that others show you. Selling your stuff is another matter.
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We can speak our conscience and tell the truth seriously every day, and we don't have to say anything else because of other people's positions and eyes. It's up to you, the millions of fans in Qian Qian, to buy our things and feed us.
We also do dry goods and products for everyone seriously. You can have a look if you are interested. Our wipers are still very good.
How to change the wiper strip by yourself Many people will choose to change it in order to save money. How could this be
I bought some things here. How can I change it? I believe these videos were made for you one after another. We have made dozens of videos of common methods for replacing wiper heads.
Let the girl change. She can change it after reading it. We think this is acceptable and reasonable.
Keywords: do it yourself
What do you think of these videos? Very simple, pay attention to "spare tire talking about car" and reply to the keyword "come by yourself".
It doesn't matter if you don't buy anything, you can learn how to change it by yourself first. Maybe you can change it for your friend, or you can buy it somewhere else.
Watching videos is very simple. Just pay attention to "spare tire talking about car" and reply to the keyword "come by yourself".
In fact, I will send you a practical dry car every day. You can watch it every day after you pay attention. There are text version, audio version and video version. Pick any one you like.
Spare tire talks about the car waiting for you to play.
involve
Low cost and good effect. Wiper: a wiper with a bone. Home of the car
Dou Guowang. Study on fault mechanism and diagnosis method of automobile wiper. Southwest jiaotong university, grade 20 12.
Sagitar automobile maintenance manual
QC/T44-2009. Electric wiper for automobile windshield.
China Climate Bulletin 2020. China Meteorological Administration
Xu, He, Yuan Qiong. Noise quality analysis of automobile wiper system. Automotive engineering, 20 14.
Yinglang warranty and maintenance manual
Zhang Lijun, Wang Xiaobo. Experimental analysis of friction characteristics of automobile wipers. China Society of Automotive Engineering. Proceedings of the 2009 annual meeting of China Automotive Engineering Society. China Society of Automotive Engineering: China Society of Automotive Engineering, 2009.
Su Yulai, Sun, Gao, Common troubleshooting methods of automobile electric wiper. Shandong industrial technology, 20 17.
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