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PAGE PAGE 38 042 Abstract In the energy, the transportation, the metallurgy, the chemical industry, the mine and other professions equipment setups, in the overhaul work, the assembling and dismantling big specification bolt quite is difficult; Some bolts install in the spatial extremely small and narrow place are unable with to lengthen the arm of force or with the method fastening and the disassemblage bolt which hammers; Some equipment long-term use in the quite moist place, the bolt rusts away seriously is unable with the artificial disassemblage, thus overhauls with difficulty; In elevated duct and on high altitude equipment skeleton fastening and disassemblage bolt, staff although wears the safety belt also with difficulty to use the strength, must safely complete the work to be extremely difficult; According to the equipment management authoritative organization statistics, has above 50% in the equipment movement breakdown is because the bolt question causes, but creates the equipment significant accident because of the bolt question the quantity also extremely astonishing, therefore the new equipment setup and the overhaul standard fasten to the bolt the moment of force request quite is strict, but meets the requirements with difficulty with the artificial method. Above the hydraulic pressure torque spanner solves the question ideal tool. This tool the high-pressure oil which produces with the necessary ultrahigh voltage hydraulic pump takes the power, automatically completes the bolt the fastening and the disassemblage work, steady, does not have the impact, safe, the assembly quality is high . 豸豸豸豸豸50%豸豸淶 Hydraulic pressure spanner Notch wheel detents Piston cylinder Connecting rod Spring Intensity Torque Circumference strength End cover Flange Fast replacement attachment 6 7 1.1.1 8 1.1.29 1.1.3 9 1.1.4 10 1.1.5 10 1.1.6 11 1.1.7 11 1.2 13 1.3 13 13 2.2.1d 13 2.2.214 2.2.314 2.2.4 15 2.315 2.4. 16 2.5 17 2.5.1 17 2.5.217 17 3.1 17 3.2 18 3.3 18 3.4.119 3.4.2 20 21 4.1.1 22 4.1.2 24 4.1.324 4.1.4 25 4.1.525 4.2.1鵯 26 4.2.2 27 4.2.3 27 27 28 29 30 31 32 36 硢塣 硢豸İ .治. 1.1 壩 壩/ () A1A2F1F2,V110fr f fr1515 dd=0.8mm nn=3.5 D D= 8.5mm f=3.56*100000d/n*D*D=876HZR150HZ 4.1.5 65Mn HRC40-50 4.2.1鵯 D1=9.5mm Pn=22N dR1.6 p 7-2-20 K=(4C-1)/(4C-4)+0.615/C C=D/d,C=5-8 鵯,10365Mnp=570MPa C=8K=1.184 dR1.6, d=0.96mm d=1mm D=8.5mm D1=7.5mm C=8.5 K=1.172 7-2-19Pd=16.5 n= Pd /P=2.9 n=3 P= Pd/n=5.5 4.2.2 b=H/D bQ5.3 bQ3.7 bQ2.6 b=H/D=0.85Q3.7 4.2.3 S= (p+0.75min)/ maxRSp max max=(8KD Pn /d*d*d)=337 MPa min min=(8KD P1/d*d*d)=144 MPa SpSp=1.3-2.2 S= (p+0.75min)/ max=1.61Q2.2. 總CPE120.档 29.6mm31mm12.8mm =1032.4Mpa(-125.2MPa)1083Mpa MM=; W濹;W= mm mm Fmm2 Mpa,3522.4-7 360乤 總CPE120.档 鲻.滹 缰塣 幤飬. 199812 棩 20048 20041 . 19889 棩 . 19938 19989 Great torque portable type hydraulic pressure spanner The great torque portable type hydraulic pressure spanner is for satisfy the enterprise to service the tool the special request but to design, it has the output torque in a big way, does not have the impact, can the accurate control want the tight strength, the easy to operate structure is compact, is suitable for many kinds of large-scale equipments bearing bolt loading and unloading. In order to facilitate in order to take the M30*2 bolt assembly as the example, introduces the great torque portable type hydraulic pressure spanner the structural design, the principle of work and the main characteristic. 1st, overall structure and principle of work But designs for great torque portable type hydraulic pressure spanner which M30*2 bolt loading and unloading, its basic parameter as follows: The bolt size is M30*2 screws tight the moment of force is most greatly 1,005 Nm hydraulic cylinder most tremendous pressure is 32 Mpa hydraulic pump fixed working pressure is 50Mpa, overall structure like chart 1 shows. The great torque portable type hydraulic pressure spanner overall is composed by two parts: Hydraulic pressure spanner (portable-type bolt hydraulic cylinder) and hydraulic system (hydraulic pressure pumping station, hydraulic pressure return route and control line). (1) the hydraulic pressure spanner portable bolt type hydraulic cylinder is the spanner main body, by the special piston screw rod, the cylinder jacket, the cylinder cover stick control switch and each kind of seal and the bridge piece and so on is composed. It turns through the transmission thread the piston straight reciprocating main motion disassembles and assembles the nut the rotary motion, thus realization thread loading and unloading. (2) the hydraulic system hydraulic system is the entire spanner main center control system. Needs the pressure according to the new system, selects the DBD0.8K series combination to pump with the hydraulic control valve, the low pressure electricity setting of switch on a car, through four steel wires hoses and electrical control line and bolt type hydraulic cylinder connection. The screw rod is reversing by a three illicit intercourses solenoid valves control, by the hydraulic pressure spanner handle on Niu type switch control solenoid valve, the realization hydraulic pressure spanner clockwise which may facilitate, reverses and stops. 2nd, the major component design and selects (1) the screw type hydraulic cylinder (hydraulic pressure spanner) for causes the ease of operation at in the entire design process, the structure to be supposed compact to be as far as possible simple, reduces the functional element as far as possible the volume and the weight, thus reduces the cost, at the same time embarks as convenient in the service angle, considered will be able to occur to the main attrition in the thread vice- on, the main service object could be a screw rod, but the screw rod cost will be higher than the piston by far, therefore decided did not consider the piston the attrition, will make the piston and the screw rod a body, the use integral type design, on the piston does not mount the guidance to fill. Considers high to the hydraulic cylinder pressure although but the piston motion speed low, thus has not used the cushion organization, the screw rod used the 45th cylinder, the cylinder jacket has used the 35CrMo steel by to reduce its diameter, the beginnings and ends end cover and the cylinder jacket uses the thread joint, because hydraulic cylinder internal pressure quite high, thus used the ability ultrahigh voltage combination in a screw rod end to show the seal packing collar, effectively has solved this difficult problem which the high-pressured cylinder was easy to reveal. Used two O seal packing collar on the piston by to divide two power oils cavities. Each important spare part intensity has all carried on the strict place examination and the design revision (for example screw rod intensity, thread tooth intensity, hydraulic cylinder wall thickness computation determined that, cylinder jacket outer diameter indeed grades), meets the design requirements completely. (2) hydraulic system design this spanner hydraulic system control loop like chart 3 shows. This hydraulic pressure spanner hydraulic system request pressure high, thus the request current capacity is small, and can realize the short time to guarantee the pressure. According to the above request, we make every effort the system in the design to be simple, explicit. Reduces the valve body as far as possible selection, reduces the production cost. Therefore has selected the overflow valve control and the stable flowing tubing head pressure in the design, when the system pressure surpasses the stipulation the working pressure, the overflow valve can automatically open carries on the discharge, by maintains the work the stability. The screw rod is reversing by three tubing crosses solenoid valves control, by hydraulic pressure spanner handle on Niu type switch control solenoid valve, but conveniently realizes the hydraulic pressure spanner clockwise, reverses and stops. At the same time in order to obtain the low velocity of movement, used the velocity modulation valve in the hydraulic system control loop to carry on reduces expenses to modulate velocity, by controlled the spanner assembling and dismantling bolt the speed. The hydraulic system pumps, the fuel tank, the overflow valve, the oil filter, the pressure gauge, three tubing crosses valves, the velocity modulation valve by the DBD0.8K electrically operated combination is composed. In the model choice, chooses the necessary product as far as possible which the specialized factory provides, both the guarantee quality and reduces the cost. This system functional element Jordanian way for the straight line bolt movement, and can realize slowly enters, the velocity modulation, the accent presses with slowly enters the function. Request pressure precise, the operational reliability is high. Its load and the time relations curve, like the chart shows. Through the computation, the parameter target which its hydraulic pump request achieved is: The working pressure is bigger than the 33Mpa current capacity to be bigger than 0.78L/Min. Requests according to this and conforms to simplicity the system to embark, decided selects the DBD0.8K electric pump, should pump is by the quota ram pump, the combination pumps, the electric motor, the measuring appliance small and so on one kind which is composed but the oil duct hydraulic pressure pumping station. Technical specification: Model DBD0.8K,Pressure 50Mpa, Current capacity 0.8 L/Min weight 40kg, electrical machinery model Y901-4-B5, external dimensions 300mm*400mm*500mm. This hydraulic system according to its job requirement,