Recently, the State-owned Assets Supervision and Administration Commission official website released news that the 2013 national key new product plan selection activities co-sponsored by the Ministry of Science and Technology, the Ministry of Environmental Protection, the Ministry of Commerce, and the General Administration of Quality Supervision, Inspection and Quarantine came to an end. Shaanxi Fast Automotive Transmission Group Co., Ltd. (hereinafter referred to as The "FH400B hydraulic retarder" of "Faster") was listed in the 2013 national key new product plan and won the title of national key new product. Also in the recent days, another news that attracted the attention of the industry was the fact that Fast's parallel hydraulic retarder was successfully tested on the ground in Dunhuang, Gansu. Under the premise of not using the brake brake, it completely relied on parallel hydraulic retarder braking to complete the field road test with a heavy load of 74 tons, a maximum gradient of 8%, and a long distance of 41 kilometers, not only meeting the special requirements of users. The various performance indicators are still far higher than the national standard of "the vehicle's designed load, 6% of the slope, 30 km/h of speed, and 6 km or 12 minutes of independent braking." As an advanced device for assisting vehicle braking , for many years, people of insight in the industry have been calling for speeding up the promotion and application of retarders. Previously, the domestic retarder market and technology were occupied and monopolized by foreign brands such as Voith, resulting in high costs, coupled with user perception, lack of regulatory constraints and other factors, the retarder has been difficult to use on heavy trucks . In this context, whether the gradually developed domestic retarder can effectively promote the acceleration of heavy-duty retarder applications? High cost, low cognition, difficult to promote retarder At present, car retarders are mainly divided into eddy current retarder and hydraulic retarder. “Electric eddy retarders are generally used in long-term low-speed operation and intermittent braking conditions. They are usually equipped on city buses, and long-distance transportation cannot be used.†Professor Chen Yinsan of Chang’an University introduced that in long-distance buses and The truck is more suitable for fitting a hydraulic retarder. "The combination of engine brake and hydraulic retarder produces a very good braking effect, which is very common in foreign countries." said Peng Li (a pseudonym), a related developer of Dongfeng Commercial Vehicles. Automotive retarders, especially hydraulic retarders, have long been widely used in developed countries, but retarders are still relatively unfamiliar to most domestic truck users. In general terms, the obstacles to the promotion of retarders in China are mainly in terms of price and awareness. It is understood that the price of a retarder is usually 20,000 to 30,000 yuan. The cost of retrofitting a retarder to an old car will be even higher. Most high-sensitivity truck users find it difficult to accept this. In particular, when truck users are faced with soaring costs in oil prices, labor costs, etc., the dilemma of not decreasing freight rates will be more sensitive to cost increases. The low level of user awareness is another important reason why retarders are difficult to promote. For a long time, the vast majority of truck users have adopted an earthy method of installing a water rinsing device, which reduces the temperature of the brake drum of the wheel by pouring water on the ultra-long slope. “China now has a portion of truck users that are getting rich first. They have demand for higher quality vehicles. Some of them have already fully accepted the retarder. But most users have not yet reached the point of updating high-end trucks. It would be difficult for them to accept it. Unless the vehicle is running in the mountains, there is a high requirement for braking performance. He has no choice, but even this part of the users still have many ways to use water.†Chen Yinsan introduced . In addition, today's trucks are usually equipped with standard engine exhaust brakes. General logistics transport users think that this is sufficient and will not be considered with a retarder device. The willingness of the automaker to promote is not strong According to Peng Li, the total weight of the sprinkler and water installed on trucks is generally around 1 ton. After replacing the retarder, the weight can be reduced by at least half or more, and the user can pull 500 kilograms or even 1 ton. The goods. According to this calculation, the incremental cost of installing the retarder can be recovered in about two years. In addition, the watering device is used to cool the service brake by physical means, which not only can not increase the braking force, but also has the potential risk of cracking the hub and puncturing the tire. "And in winter, it's easy to get dripping with water. Driving on an ice-drifting ice slope is also a great threat to other cars." Peng Li said. At the same time, many users do not know or do not realize that, although the retarder increases purchase costs in the short term, it can help them achieve their dream of reducing operating costs. According to the relevant person in charge of Voith Turbo Technology Systems (Shanghai) Co., Ltd., a large amount of actual operational data shows that the service life of the main brake can be extended by 4 to 6 times or more after the hydraulic retarder is equipped. Tire life, protection of transmission systems, etc., and can improve the average operating speed of 5% to 6%, so that the engine more work in the economic speed area, thereby reducing fuel consumption. In addition, not only users, even though many people in the industry have misunderstood the scope of use of the retarder, he believes that retarders are only required for long downhill sections. “In fact, the advantage of retarder is not only in the mountain area, but also has advantages in medium and long distance transportation. Experienced drivers will make full use of retarder to avoid friction block friction and reduce main brake loss. Not only can the brakes be saved, but also the braking effect and the smooth running of the vehicle can be improved.†A person from Shenzhen Tejia Technology Co., Ltd. said. “In other words, I feel that our business is also a bit of a responsibility. We haven't made clear the value that the retarder can bring to users. In fact, it is very easy to make it clear to the user that the value of installing the retarder is clear. "Promotion." Peng Li pointed out that the lack of a positive attitude toward vehicle manufacturers is also one of the reasons for retarder promotion. Zhang Hongxin of vehicle management of Tangshan Jidong Cement Motor Transport Co., Ltd. also stated that retarder braking effect is good and the design is reasonable. However, most car manufacturers only rely on the market theory and think that matching or standard retarder will increase vehicle prices. The owner recognized it, so "a lot of car manufacturers would prefer to install a shower device on the wheel's brake hub, and not fit the retarder at the factory." Domestic retarder strives for upstream From this point of view, if the retarder is to be truly promoted, raising awareness and reducing costs are key. With the increasing awareness of traffic safety in China and the tightening of the security situation, users’ awareness of assistive braking is slowly increasing, but their high prices for retarders are still unacceptable, which has hindered the slowdown to a large extent. The promotion of the device. “The promotion and application of the retarder on the truck is still the same and little progress has been made.†Tan Xiuqing, an expert from the China Automobile Industry Association and vice president of Shandong Heavy Industry Group Co., Ltd., said: “But now, Fast has made a hydraulic retarder. , It is estimated that it will be promoted in the future. Because the original domestic brands are Voith and other imported brands, the price is high." However, the development prospect of the retarder is always being recognized by the industry. It is optimistic about its future development. There are also more than one domestic company that has invested in the development of retarder products like Fast and seeks to break the foreign technology monopoly. Chen Yinsan suggested that the quality of the hydraulic retarder not only affects the economic effect, but also affects traffic safety, may cause accidents, and is fatal. Therefore, all kinds of retarder products developed by domestic enterprises must be tested strictly in the laboratory conditions, but must also go to the actual road conditions, especially to the first long slope of the highway in China to pass the driving test in order to ensure safety. “I have read the related reports by Fast and I’m still very good.†Chen Yinsan commented: “There are some other companies in the country who are doing retarder products, but they just say they can be used. I haven’t seen any reports yet. Said that he had done relatively rigorous tests on the road downhill." Therefore, he believes that Fast's parallel hydraulic retarder's successful field test is "very encouraging." "The promotion of the retarder needs a process. The current retarder cost is relatively high. If there is no domestic thing to keep up with, it will actually mean that the promotion conditions are not very mature, and the manufacturers will not push hard. Then everyone The retarder has a high expectation value, but it can't be realized at all.†Chen Yinsan added: “Then with domestically produced things, we will have more confidence in promoting it.†Mainly to remove the large margin and lay the foundation for the subsequent sequence of precision, the process requires milling the inner contour according to the part structure diagram shown, and pre-finishing the reference hole required for the precision. The aluminum alloy parts are precision-selected with the center hole as the reference hole, and the center hole is boring after the outer circle of the lathe, and the reference hole must be completed before the precision cavity. Cnc Milling Acrylic Block,Milling Machining Parts,Oem Milling Machining Parts Chongqing Jin Te Rui Machine Co.,Ltd , https://www.cncjtr.com
Retarder 
Retarders exhibited at the parts exhibition