【正文】 ere ≤ 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 parametersThe 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。 Heavyweight, poor mobility, flexibility to decline. The selfrespect as it may be w = (t) estimates, in the Ntype body for cutting power, kW。 V for the cutting head on average cutting speed, m / s。 can also be Roadheader with reference to the existing analog method to determine , machine(t) and cutting power (kW) ratio of to . For general coal, rock bottom, the allowable value p ≤ MPa。 muddy for the water to soften the shale bottom, p ≤ MPa. movement parametersCutting the movement parameters: cutting head of the average cutting speed V: on the oneway coal and rock pressive strength of 40 MPa, V = 3 ~ / s。 60MPa, V = 2 ~ / s, 60MPa. V = l ~ 2m / s. But eventually cutting speed by cutting technology to determine. dynamic parametersRoadheaderdriven power sources are used Motors. Cutting power body size. In fact the general use of analogy, bined with roadheader some personality and experience factors to determine.Roadheader in the operating process, the vertical axis and the horizontal axisof the need for adequate cutting edge and push forward swing (horizontal and vertical) force. According to Russia (the former Soviet Union) in the laboratory test results that the cutting of coal and rock platts hardness f = 4 ~ 6 (equivalent to 0 C = 40 ~ 60MPa), grinding coefficient F = 5 ~ 7mg/mm2. Cutting the shaking force (traction) Pv = (1 ~ ) P, P = M / Rcp, in the Pcutting head for the average cutting edge。 Rcp cutting head for the average radius。 M for cutting the head of the rated torque. Cut the feeding of (axial thrust) R。 ( ~ ) Pv, this force should be no larger than the floor slippery track at the limits of traction. technical and economic indicatorsQ = (m3/min), in the sxcutting head for the vertical cross 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 between1) 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 ≥ 12000 N, pick the best angle for the installation of 45 176。 ~ 48 176。.2) Cutting the link .Cutting agencies cantilever Chaxinginstalled in front of the fixedChaxing rotary table, the turret to the rack. According to cutting agencies in the course of operating the force and torque, the application of MT4751996 cantilevered Roadheader rotary bearing type, the basic parameters and technical requirements selected rotary bearing the structural type, determined by calculating slewing ring size specifications. If the user does not require a cantilever stretching structure, is generally not remended. shipping agencies determine the parameters 1) Loading mechanism Loading bodies and Middle conveyor used linkage or singleaction mode, loading the bodies rake claws speed is generally 25 ~ 48 r / min. Star Ferry39。s speed can be slightly higher than some. Using directdrive hydraulic motors, the maximum output torque rated torque for calculating the value of times. Shovel coalgeneral of the tilt angle to 21 176。 ~ 25 176。, it should be the width of track, spacious than the ~ m, declining position should not be less than the minimum depth of undercover maximum height should be increased to 350 ~ 400 mm. 2) Intermediate conveyor Middle conveyor chain may be single or doublestranded chain structure of the ring chain, chainspeed should not exceed m / s, using the . chain of universal sleeve roller chain single chain, the chain speed should not exceed m / s, generally from ~ 2 m in order to meet the changing demands a high degree of unloading, the tail should be set up multistage hydraulic cylinders to achieve takeoff and landing movements, raising the minimum height for the hopper and a high degree of around 300 mm. If the tail need to swing around, the United States must adopt a universal sleeve roller chain, to set the location of the sideeffect hydraulic cylinder to achieve the tail swing around 45 176。, to expand the width of unloading. running track and identify the technical parameters of connectivity between a)walking track drivers and transmission patterns have the following two ways, the overall design and layout determined at the time one of them. 1) Drive a motordriven than reducer (i ≈ 250) →