Guo Yonghe quickly explained the reason to Zhai Yuqiang:

It turns out that the reason why the 75 type air filter imitated by the internal assembly factory will absorb oil is that the metal wire filter material filled by the air filter is manually filled, even if the operation is skilled, it is difficult to fill evenly, and the metal wire is easy to clump into wisps.

Under the same design, the reason why the original air filter of Huaxia Yituo Factory will not absorb oil is because there is a special filter material filling equipment, which can ensure that the filled wire filter material has a uniform gap and a firm connection, and there will be no phenomenon of wisps of huddles, so that the air is blocked evenly when filtering, and there is no problem of excessive flow rate caused by shortcuts, and there will be no oil absorption.

Once you understand how it works, the solution is simple. Or it is like Huaxia Yituo Factory, which designs and manufactures special filling equipment; Either it is to change the original design of Huaxia Yituo factory to avoid the problem of uneven air obstruction in the air filter, resulting in excessive local flow rate.

For Guo Yonghe, compared with the design and manufacture of special filling equipment, it is obvious that changing the original design scheme of Huaxia Yituo Factory is a faster and more labor-saving method.

Replacing the metal wire with a 60-mesh metal mesh can make the gap of the filter material as uniform as the gap of the wire filled by the machine in Huaxia Yituo Factory at 60 mesh, and there will be no problem of too loose or too tight.

The purpose of reducing the amount of horsetail from the original one city catty to 0.5 city catties is also to reduce the pressure of the horsetail on the metal mesh, so that the metal mesh will not be squeezed and deformed because the horsetail is filled too much.

In the plan, a Type 75 tractor cylinder sleeve and a 20 fan belt were added to the contact between the oil pan and the housing, so that the oil pan was lowered by 15 mm. This further reduces the impact of air on the oil pan and fully guarantees the possibility of the oil from the oil tank being sucked into the air filter.

After listening to Guo Yonghe's story, Zhai Yuqiang suddenly realized, he hammered his thigh hard, and said with annoyance:

"The reason is so simple, why can't I think of changing the structure of the 75 air filter!"

Guo Yonghe couldn't help laughing.

In fact, this situation is not unique.

There are many similar situations in the field of engineering and science and technology in China, including many craft traditions, which have been passed down to the present and many people do not know why this is the case, which may be a wrong habit at the beginning, but it has been retained, and its essence is blind obedience to authority.

There is a famous joke in the history of China Airlines. That is, when Huaxia scientific and technological personnel imitate the aircraft of the big brother in the north, they are imitated in strict accordance with the original material process.

But once, in the prototype provided by Big Brother, there was a piece of soap in a closed cavity, and Huaxia technicians didn't know why, but they also put a piece of it. Later, when the technical experts of Big Brother inspected the prototype of the Huaxia imitation, they found that a piece of soap was placed in the sealing cavity, which was very strange, so they asked the reason. After listening to the explanation of Huaxia technicians, the technical experts of Big Brother burst into laughter on the spot.

You know, it's the top people who can participate in aircraft manufacturing, and even they make such mistakes. In contrast, Zhai Yuqiang is just a biotechnology section chief of a local state-owned enterprise, and it is the first time to produce air filters, and it is too difficult for him to break the rut of thinking and boldly transform the structure of the 75-type air filter!

"Comrade Yonghe, how did you know the reason and come up with this solution?" Zhai Yuqiang quickly threw out another question.

"Yes, Comrade Yonghe, how did you come up with this solution?"

Luo Daojun and Xiao and Huang, the two deputy factory directors, all stared at Guo Yonghe. Like Zhai Yuqiang, they were also very curious about how Guo Yonghe came up with this ingenious solution, knowing that Guo Yonghe was just an apprentice with only a little more than a year of experience.

"Huh!"

Guo Yonghe laughed again.

In fact, this solution was not his original idea, but he heard it from the trainer when he attended an advanced technician training course in Guangdong Province in his previous life.

The teacher turned out to be a senior technician of Huaxia Yituo Factory, and after retirement, he was hired by a company in eastern Guangdong to be responsible for the development of Dongfanghong series air filters. The transformation plan of the 75 air filter is one of the cases he lectured on......

Of course, at this time, Guo Yonghe had no way to tell the truth. Fortunately, he had expected to be asked this question before, and he had already made up some arguments in advance.

"Section Chief Zhai, this matter is a long story!"

Guo Yonghe said, "When the factory posted the recruitment list two months ago, I paid attention to this matter. It happened that one of my junior high school classmates had a 75 tractor that was going to be scrapped, so I removed the original air filter on his tractor, and then rummaged through a few used imitations from the waste pile in our factory.

"After repeated comparative research, I finally found that the metal wire of our factory is unevenly filled, and there is a phenomenon of huddle into wisps, while the wire gap filled by the original air filter is uniform and firmly connected, and there is no phenomenon of clumping into wisps.

Then I went to Los Angeles to find a local acquaintance to inquire about Huaxia No. 1 Tractor Factory, and found that Huaxia No. 1 Tractor Factory made a special trip to solve this problem for the wire filter material special filling equipment......

"Equipment imitation is definitely not an overnight thing, so I tried to change the structure of the air filter to see if I could start from this aspect to eliminate the problem of oil absorption of the air filter.

"I didn't find the best solution until yesterday, so this morning, I went to unveil the job list......"

Guo Yonghe had just finished speaking, and Zhai Yuqiang over there whispered a situation to Luo Daojun's ear:

"Factory director, Guo Yonghe's father turned out to be the most skilled mechanic in our factory, an eighth-level fitter."

"It turns out that there is a family history, so it's no wonder!"

Luo Daojun was already fascinated by listening to it, and was moved by Guo Yonghe's story, and now the situation that Zhai Yuqiang added has increased the persuasiveness of this story.

"Comrade Yonghe, your father really taught a good son!"

He stood up, raised his wine glass, and said to Guo Yonghe: "There is nothing difficult in the world, as long as you are willing to climb!" Your spirit of not being afraid of difficulties and daring to face difficulties in your work is worth learning from! Come, I'll toast you again! ”

"Yes, yes, we will also follow the factory director to have a good time, toast you!" Xiao and Huang, the two factory directors, Liu Yimao and Zhai Yuqiang, also stood up and raised their glasses at Guo Yonghe.

"Thank you leaders, I did it, you are free!"

What else can Guo Yonghe say? I could only drink it all with a wine glass and a few leaders.

As soon as everyone put down their wine glasses, they heard a knock on the door of the private room, and a young man in a suit and leather shoes pushed the door and walked in.

"Ouch, Director Luo, it's really lively today!" When the young man in a suit entered the door, he greeted Luo Daojun loudly: "I came uninvited, didn't disturb you, right?" ”

Luo Daojun obviously didn't expect the young man in a suit to come over at this time, he was very surprised, but his face was impassive, he got up and greeted him with a smile: "Commissioner Zhao, why are you so polite?" We can't usually ask you! Come on, come on, sit down, let's have a few drinks! ”