機械畢業(yè)設(shè)計英文翻譯--具有非光滑特性的仿生推土機刮板對土壤阻力減小的影響-其他專業(yè)-wenkub.com
2025-01-15 06:09 本頁面
【正文】 光滑樣本的隨 切削阻力 著試驗次數(shù)的增加而增加，但是非光滑樣本的 切削阻力 根據(jù)光滑性而變化。 影響 推土機刮板切割阻力的因素包括非光滑表面凸起的數(shù)量 ， 凸起底座直徑 ， 凸起 分布和凸 起 高度。 由于樣本 1 表面的土壤附著，隨著實驗次數(shù)的增加 切削阻力 也增加，表明了累計附著的現(xiàn)象 。 圖 7 非光滑凸起高度 對切削阻力的影響 試驗次數(shù)對于土壤粘附和阻力的影響 與 上述情況相同的土壤和 測試 條件 下 ，樣品 1 和 7 被測試了 8 次 。 結(jié)果發(fā)現(xiàn)， 在 這一組中 樣本 9 的 切削阻力 最低。 樣本 8 的 切削阻力 比光滑樣本低了 ％。 樣本 1 是最高的 。 圖 5 表明了上述樣本的平均測試力。樣本 4 的 切削阻力 比光滑樣本低了 ％。 和測試土壤 的水 分含量 為 ％ 。 所有樣本 相同條件下 被測試 ，每個實驗重復 3 次。 由安裝在被測刮板和固定框架之間的 兩個八角環(huán)測功機 測量 切削阻力 。 土壤箱長 米， 寬 米和 深 米。 表 1 全尺寸表（ 10,000 ） 鑒于在第 測試土壤 經(jīng)測試的土壤是一種 從 吉林省 采得的 黑色粘土。 在推土試驗中切割 角度為 52 176。 樣本和樣本上的小凸起被鑄造在一起 。 [ 8 ， 9 ， 10 和 11 ] 。 這種 非光滑結(jié)構(gòu) 是這些洞穴型動物沒有粘附土壤的原因之。韓，張等人，研究 了在犁形器具耕作阻力方面磁性所起的作用 。為了 減少耕地阻力 ，一種彗星 型帶通道孔的模板已被研發(fā)出來 [ 19 ] 。 這 種粘附 增加了 機械 的工作阻力和能源消耗， 降低了 他們的 工作質(zhì)量 。光滑的樣本 在土壤粘附和 切削阻力 方面也是不同的。為了研究非光滑特性在減小土壤阻力方面的影響，幾個具有非光凸起形式的推土機刮板已被測試。 during bulldozing tests. The curved radius of the blade was mm, and the thickness was 15 mm. Fullsize image (29K) Fig. 2. A photograph of a bulldozer blade sample used for tests. Table 1. The nonsmooth characteristic differences of the samples Fullsize table (10K) . The tested soil The tested soil was a kind of black clay from Jilin Province, China. The moisture content was % (.). The particle size distribution of the tested soil is listed in Table 2. Table 2. The particle size distribution of the tested soil, liquid limit (WL) and plastic limit (WP) Fullsize table (2K) . The equipments and conditions The tests were run in a soil bin at Jilin University (Nanling Campus). The dimensions of the soil bin are m long, m wide and m deep. The soil bin is driven by an electric motor through a gear box. In the experiment, the tested blade was mounted on a fixed frame structure which was above the soil bin. As the soil bin moved, the tested blade cut the soil. The draft forces were measured through two octagonal ring dynamometers mounted between the tested blades and the fixed frame structure. These force signals were conditioned with a strain gage, and then recorded in a cassette data recorder. The recorded data was processed in a signal processor. The depth of cut was 15 mm, and the speed of cut was m/s. All samples were tested in the same conditions, and every experiment was repeated three times. The experimental system is illustrated in Fig. 3. Fullsize image (27K) Fig. 3. The experimental system. 3. Results and discussions . Effects of the number of the nonsmooth convexes Sample No. 1 (smooth), No. 2 (convex NUMBER=16), No. 3 (convex NUMBER=13) and No. 4 (convex NUMBER=19) were chosen as samples for tests. The cut velocity was m/s, the cut depth was 15 mm, the cut angle was 46176。 this adhesion increases their working resistance. Bionics is one of the most effective methods to reduce resistance against soil. Several nonsmooth convex form bulldozer blades were tested to study the effects of nonsmooth characteristics on resistance reduction against soil. Under the same soil and test conditions, the draft forces of different nonsmooth samples were obtained, and were lower than those of smooth samples. The sample with largest convex base diameter had the low
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