【正文】
necessary machines from a remote control device, monitoring pressure, temperature, level and key parts the fault diagnosis device. Layout General layout of the contents include the following: 1) Identify the ponents in plete machine said the location, shape and size of the request。 4) When all the major ponents designed after. Checking should be carried out, does not meet requirements to be adjusted just so that the focus in track and less than the former center Shaopian L / 6 (L grounding for the track length). In addition, the center of gravity position in the demand for cutting bodies turret after the centerline, and Yuediyuehao high center of gravity to enhance stability when operating machinery. 5) the overall layout should consider the weight of symmetrical left and right and take care of work habits and to facilitate the operation. General driver in the left side of the fuselage and the fuselage in the rear, driver seat height should ensure that the people39。 weight parameter, parameter of movement and dynamic parameter. size parameters Complete machine length, width of the size directly related to its turning radius, Remended lightlength ≤ m, mediumlength ≤ m, heavy machine ≤ l0m, the corresponding width were ≤ m, ≤ m, ≤ 3 m. The plete machine relates its tendency, the static stability highly directly, the adaptation scope and passes quality, therefore lower better. The current development trend of Chinese and foreign models is the dwarf models, medium and heavyhigh ~ 2 m, special light, light machine the height of ~ m. Roadheader to dig the biggest section of roadway, the minimum height and width should be designed to meet the requirements of the mission. Undercover depth of 250 ~ 400 mm, ground clearance C = B/13 +84 (mm), B for the two track distance). Middlelong conveyor entrance to the expected high degree of the best 400 mm, length of track ground with the center distance L B ratio for L / B ≤ . weight parameters The plete machine dead weight is the mechanical roadheader an important parameter, the engine weight too is light, the work stability drops, when swinging cutting can occur fishtails the phenomenon, the cutting efficiency drops, truncation tooth rate of wear increase。 ( ~ ) Pv, this force should be no larger than the floor slippery track at the limits of traction. technical and economic indicators Q = (m3/min), in the sxcutting head for the verticalcross sectional area, m2: Vn for the cutting head of cutting swing speed, m / min. Roadheader designed life, in the international advanced products up to 3 to 5 years, during which the need of major repair or wells, the general domestic product for 1 to 2 years. 4 in accordance with design requirements. Determine the parameters of the main ponents and their relationship between the connector cutting agencies and technical parameters of the established link between 1) Cuttingagency technical parameters of cutting the head with the general pick for the doubleheaded or three spiral layout. Cutting head speed n = 20 ~ 65r/min, a sharp pick cutting the average speed V = ~ / s, cutting swing speed Vn = ~ l0m / s. Cutoff line from t = 20 ~ 50mm, (when cutting coal from the value of alltime for small value). Average singlepole/doublethrow force should reach: f4 grade coal and rock F ≥ 2500 N, f6 grade coal and rock F ≥ 5000 N, f8 grade coal and rock F ≥ 12020 N, pick the best angle for the installation of 45 176。 muddy for the water to soften the shale bottom, ≤ MPa. movement parameters Cutting the movement parameters: cutting head of the average cutting speed V: on the oneway coal and rock pressive strength of σ c ≤ 40 MPa, V = 3 ~ / s。 2) economic rationality: drive system as simple as possible, fewer ponents and easy processing, low price, easy maintenance, long life。s seat。 5. 結(jié)語 掘進機的總體設(shè)計是掘進機設(shè)計工程中技術(shù)設(shè)計的 個組成部分。對截割巖石的情況下應(yīng)適當提高水壓和水量。 系統(tǒng)的額定工作壓力不 宜高于 20~25MPa。 (1)電動機驅(qū)動一大傳動比減速器 (i≈ 250)→帶動主動鏈輪。采用液壓馬達直接驅(qū)動時,最大輸出 扭矩應(yīng)為計算額定扭矩值的 1. 5 倍。截線距離 t=20~50mm, (切煤時取大值, 切巖時取小值 )。 根據(jù)俄羅斯 (原蘇聯(lián) )在實驗室的試驗結(jié)果得知,截割煤巖的普氏硬度 f=4~6(相當于 0 C=40~60MPa),研磨系數(shù) F=5~7mg/ mm2。 — 般它的自重可按 w=(t)估算,式中 N 為截割機構(gòu)功率, kW; V 為截割頭平均截割速度, m/s;也可參照現(xiàn)有掘進機用類比法來確定,機重 (t) 與截割功率 ( kW) 之比為 0. 25~ 0. 對于一般煤、 4。 2.確定整機主要技術(shù)參數(shù) 掘進機整機主要技術(shù)參數(shù)包括尺寸參數(shù) (長寬高 )、重量參數(shù)、運動參 數(shù)和動力參數(shù)。 采用齒輪油馬達 ,容積效率高,耐沖擊性能好,維修容易,造價較低,一臺 10KW 左右齒輪油馬達的價格只有同功率徑向柱塞馬達的 1/10;尺寸小、重量輕。 ( 3)履帶行走機構(gòu)的驅(qū)動方式有電動機和油馬達驅(qū)動兩種方式。應(yīng)利用體積小、功率大、過負荷能力強的專用電動 機,并配備可靠的電氣保護裝置。此外,還需求重心 位置在截割機構(gòu)回轉(zhuǎn)臺中心線之后,而且重心高度越低越好,以提高機器作業(yè)時 的穩(wěn)定性。電控系統(tǒng)包括動力部分、控制部分和檢測部分。目前部分 斷面掘進機通常采用履帶式行走機構(gòu)。 目前,這兩種輸送機構(gòu)均有采用,設(shè)計時應(yīng)酌情確定。部分斷面掘進機多采用刮板鏈式輸送機構(gòu)。它們可采用分別驅(qū)動 或集中聯(lián)動方式,既可用交流電動機驅(qū)動,也可用液壓馬達驅(qū)動。 按截割頭的布置方式,分為縱軸和橫軸式兩種。 1.選定該機型和各個部件及其結(jié)構(gòu)型式、驅(qū)動方式、并進行總 體的合理布置 該項內(nèi)容在確定前,首先應(yīng)滿足設(shè)計任務(wù)書的內(nèi)容,特別是用戶提出的主要 要求經(jīng)過調(diào)研,雙方反復(fù)交換意見,達到既能滿足用戶 (或上級 )條件,又能較好 的符合本企業(yè)產(chǎn)品發(fā)展的總體規(guī)劃。 1)機型的選定 根據(jù)掘進機的用途, 是用于煤礦井下巷道的掘進還是用于其他行業(yè)的工程作 業(yè),掘進機的工作 條件是用于截割煤巷還是半煤巖巷,煤巖的單向抗壓強度(或 普氏系數(shù) f 值 )及巖石的磨蝕系數(shù)。 縱軸式截割頭的優(yōu)點是:傳動方便、結(jié)構(gòu)緊湊,能截出任意形狀的斷面,易 于獲得較為平整的斷面,有利于采用內(nèi)伸縮懸臂,可挖柱窩或水溝。 耙爪式是利用一對交替動作的耙爪來不斷地耙取物料并裝入轉(zhuǎn)載運輸機構(gòu)。輸送 機構(gòu)一 般是由機尾向機頭方向傾斜向上布置的。一般常采用與裝載機 構(gòu)相同的驅(qū)動方式。兩條履帶分別由各自的動力來驅(qū)動,可實 現(xiàn)原地轉(zhuǎn)向。電控系統(tǒng)必 須按照煤礦井下防爆要求設(shè)計、制造、檢驗,必須符合 GB38362020 標準中的 有關(guān)規(guī)定和要求。 ( 5)總體布置應(yīng)考慮左右兩側(cè)重量對稱并照顧工作習慣及方便操作。根據(jù)工作機構(gòu)結(jié)構(gòu)緊湊的特點,通常工作機構(gòu) 的減速器設(shè)在懸臂內(nèi),成為懸臂的組成部分。分別通過 機械減速裝置或直接由油馬達帶動履帶的主動鏈輪運轉(zhuǎn)。 一臺 10KW 左右齒輪油馬達的重量,僅為同功率低速大扭矩馬達的 1/18,為電動 機重量的 1/13。 1)尺寸參數(shù) 整機長度、寬度的大小直接與其轉(zhuǎn)彎半徑有關(guān),推薦輕型機長度≤ 7. 5m, 中型機長度≤ 8. 5m,重型機≤ l0m,對應(yīng)的寬度分別為≤ ,≤ ,≤ 3m。 巖底板, 許用值 ≤ ; 對于水軟化的泥質(zhì)頁巖底板, ≤ 0. 05MPa。截割時的擺動力 (牽 引力 )Pv=(1~1. 34)P, P=M/ Rcp,式中 P 為截割頭上的平均截割力; Rcp 為截 割頭平均半徑; 為截割頭上的額定扭矩。 平均單刀力應(yīng)達到: 級煤巖 F≥ 2500N, 級煤巖 F≥ 5000N, f4 f6 f8 級煤巖 F≥ 12020N,截齒安裝角最佳為 45176。鏟煤板的傾斜角一般為 21176。 一般只能確定一種行走速度 5~ / min。在系統(tǒng)有液壓馬達傳動動力時應(yīng)設(shè)置冷卻器,