BTD2

7MPa, 450kW of power of electric machinery of form a complete set. This machine design is reasonable, semmetry of 4 cylinder body is decorated. Equipment load balance, movement is smooth, oscillatory small, noise efficiency of low, exhaust is tall, it is 20 centuries of our country 80 time are large and medium-sized one of main model that mine uses. Current, a lot of mine still use machine of this kind of pneumatics, and spare parts came true basically homebred change. Two when big hill iron ore uses east this model pneumatics machine was 1978 installation is cast use. Current, condition of this machine technology stability of better, capacity, efficiency is tall, still have higher use value. But because movement is old, 3 pressure control system of discharge carry on one's shoulder a powerful person appears constantly invalidation phenomenon, make discharge carries on his shoulder or back implement not movement or misoperation, the safe movement that gives pneumatics chance caused huge to browbeat. Homebred pressure dominates a powerful person or family not only the price is high, and because produce manufacturer,the reason such as little, production parameter and mapping precision cannot replace former outfit part. The article controls reason of invalidation of a powerful person to undertake an analysis to pressure, undertake transforming. One, signal of system of carry on one's shoulder of discharge of machine of one Icc pneumatics sees BTD2 of system of carry on one's shoulder of discharge of machine of one Icc of BTD2 pneumatics graph 1, this system is left by oily moisture implement, 3 faucets, pressure dominates a powerful person or family, low pressure is pushed, the discharge that play side carries on his shoulder or back implement, high pressure is pushed, the discharge that play side carries on his shoulder or back implement, low-pressure clearance a powerful person, the composition such as high-pressured clearance a powerful person. Its job process is: Pneumatics machine works normally (to load) when, pressure lifts gradually, lift when pressure fair value (normally set is 0.

55MPa) when, one class dominates action of a powerful person, make a powerful person of tall, low-pressure clearance works, 75% what capacity reduces rating. Lift when pressure 0.

When 65MPa, 2 class pressure dominates action of a powerful person, make tall, low pressure pushs side discharge to carry on one's shoulder or back implement the job, 50% what capacity reduces rating. Pressure lifts 0.

When 7MPa, 3 class pressure dominates action of a powerful person, make tall, low pressure pulls side discharge to carry on one's shoulder or back implement the job, make the capacity of pneumatics machine falls for 0. So far, complete process of all discharge carry on one's shoulder. When pressure ordinal drop 0.

65Mpa, 0.

6Mpa, 0.

When 5Mpa, controller of pressure of 3 class, 2 class, one class is ordinal movement, various discharge carries on his shoulder or back implement restore savagery, make pneumatics machine enters working state afresh. When pneumatics machine is started 3 faucets are in put through condition, of pneumatics machine eduction compress air classics gas tank, faucet to send to various discharge to carry on one's shoulder or back directly implement, make discharge carries on his shoulder or back implement the job, make pneumatics machine is in thereby " 0 bear " condition falls to be started smoothly. The pressure in the structure of a powerful person of control of nextpage2, pressure and working principle system dominates a powerful person or family (graph 2) make calm screw by piston, pressure spring, stabilizer, pressure, adjust and the composition such as A of locknut, interface, B, C and filter air chamber, gaskets, housing. Interface A is the interface that take energy of life, with gas tank join. B is interface of discharge carry on one's shoulder, carry on his shoulder or back with discharge implement conterminous. C is exhaust interface, be interlinked through 3 faucets and air. Pressure controls the working principle of a powerful person to be: Below the circumstance that is in regular job when pneumatics machine, the pressure of gas tank lifts gradually, lift when pressure when certain level, the piston overcomes bedspring bounce and drop, open B of interface of discharge carry on one's shoulder, make its and A of the interface that take energy of life are interlinked, compress air to enter discharge to carry on one's shoulder or back implement the antrum that take energy of life, make discharge carries on his shoulder or back implement the job, function of carry on one's shoulder of the discharge that finish. At the same time the fall as a result of the piston, make piston underside is stuck with valve base of stabilizer end face seal cheek by jowl, prevent to compress air to enter atmosphere through bedspring room ease. As the extension of time of discharge carry on one's shoulder, the pressure in gas tank drops gradually, when pressure 10 thousand; Fall certain level, bedspring bounce will be overcome compress airy pressure to make the piston rises, return initiative position. Discharge carries on his shoulder or back implement into the compression of gas antrum air passes transgression of C of room of interface B, bedspring, interface, discharge carries on his shoulder or back implement quit the job. When adjusting pressure of discharge carry on one's shoulder, loose locknut, adjust pressure to make calm screw, change its to bedspring beforehand pressure, make pressure of discharge carry on one's shoulder is achieved book a value. Adjust the raises Cheng Ke to adjust pressure to change range of stabilizer, work namely the journey, carry on his shoulder or back from discharge namely the next time the pressure when to load needs a value, adjust pressure of the carry on one's shoulder that compare discharge normally the cost is low 0.

05MPa, add often in order to prevent empty press, uninstall. 3, in the environment that job of a powerful person of control of pressure of case study of invalidation of pressure control a powerful person erodes in air current of oscillatory, high frequency, high temperature, below normal working requirement, movement of pressure control a powerful person is not frequent, but reach the case with the capacity identical or similar as it happens when working with wind force and class of pneumatics machine some to fall greatly with wind load change below the well, cause pressure to dominate a powerful person or family frequent movement, make pressure controls a powerful person, discharge to carry on one's shoulder or back thereby implement each motion component wears away aggravate. Because pressure controls a powerful person to divide,cupreous material all is outside bedspring and bedspring guide bar make, the carry on one's shoulder that compare discharge implement grind loss effect more easily and bring about discharge work of system of carry on one's shoulder is abnormal. Wait for respect regard from working environment, structure, the main reason that causes pressure to command be no longer in force of a powerful person has the following sides: 1. Dirt influence. Pressure controls a powerful person to design choiceness, production nicety, suffer the effect that petty air pressure changes easily. Because general mine all lies in harsh environment, air contains dirt the volume is high, although classics multistage filters, but still have a few dirt inspiratory air cylinder is compressed in entering pressure to gas tank to dominate a powerful person or family, cause pressure to control misoperation of a powerful person. This kind of circumstance can make pressure controls stand or fall of a powerful person commonly, phenomenon of the breakdown after be being cleaned to a powerful person is eliminated. 2. The piston wears away. The piston is one of crucial parts of pressure control a powerful person, main and sealed place is the cone-shaped clitellum of piston coping, after this place wears away, make piston and housing seal band are shut lax, cause pressure to dominate a powerful person or family flat, serious when, make the piston cannot overcome bedspring bounce and drop, create system of discharge carry on one's shoulder cannot discharge carries on his shoulder or back, pneumatics machine pressure is unusually elevatory, relief valve open bleats, easy cause great and safe accident. Piston tatty is other place is circumferential place and the cooperate with pressure spring guide bar taper hole outside the piston, after these two place wear away badly, the piston is easy in batter of body of a powerful person inclined card dies, cause a system to discharge carry on one's shoulder, constant discharge carries on his shoulder or back or be not added, the breakdown with discharge numerous carrier frequency happens. 3. Piston base face and valve base of stabilizer end face wear away. After this place wears away, lose sealed action, when pressure dominates action of a powerful person, compress air classics leak of this sealing surface, cause a system to add, discharge carrier frequency is numerous, make discharge carries on his shoulder or back to pressure and journey adjust difficulty or cannot be adjusted at all at the same time. In addition, leak of pipeline of carry on one's shoulder of pressure spring exhaustion, discharge, jam, discharge carries on his shoulder or back implement housing is sealed and lax etc, all can cause pressure to command be no longer in force of a powerful person, but can restore its function through groovy maintenance. The place on put together is narrated, the reason that causes pressure to command be no longer in force of a powerful person is more, among them afore-mentioned the 2nd, the 29th kind of circumstance cannot restore its function with groovy maintenance method, must change new a powerful person or family. But the place before be like is narrated, homebred pressure dominates a powerful person or family not only the price is high (every are controlled 1500 yuan only) , and cannot go up as a result of each respect reason machine use. 4, the transforms a basis to control principle of job of a powerful person to pressure analysis of pressure control a powerful person, the functional cent of pressure control a powerful person is delivered for signal and actuator two parts, compressing gas to overcome bedspring force to make the piston is down motion to be able to be regarded is signal is accumulated pass level, the piston is down motion to open interface of discharge carry on one's shoulder to be able to be regarded is executive phase. According to above train of thought, but will transform plan to be signal sampling surely, receive enlarge, executive component 3 parts composition. For this, signal sample part chooses pressure of YX100 report contact to express (pressure 0 ～ 1MPa, coil voltage is communication 220V) , express with this kind often open contact to accept signal of discharge carry on one's shoulder, with often shut contact to accept to load signal, transmit signal at the same time receive enlarge share, signal receives enlarge part to choose JZ7- 44 auxiliary relay (coil voltage is communication 220V) , executive component is delivered after magnifying signal with the telegraphic date that will receive watch of electric contact pressure to be transmitted, executive component chooses 23JVD one X1 of one L3 2 3 sheet are electronic-controlled often shut end type electromagnetism a powerful person (coil voltage is communication 220V) , with the electric signal that will receive auxiliary relay to be transmitted and open shut-off valve, will compress air to send to discharge to carry on one's shoulder or back implement. The system of carry on one's shoulder of pneumatics machine discharge after Nextpage is transformed (graph 3) demolished original 3 pressure dominate a powerful person or family, express with pressure of 3 report contact (B1 ～ B3) , 6 auxiliary relay (＇ of KA3 of ～ of ＇ of KA3 of KAI ＇ ～ , KAl ＇ ) with a powerful person of magnetism of 3 2 3 electrify (JVDI one JVD3) will replace. Electric job principle (graph 4) as follows: When press of high above in the sky is started, the faucet is in put through condition, a powerful person of pressure watch, electromagnetism is in savagery. ＇ of KA3 of KA1 ＇ ～ is in relay suck close position, often shut contact to disconnect, make KA3 of ～ of auxiliary relay KA1 cannot get report to suck close, electromagnetism a powerful person is in cut off the power condition. The reduces a powerful person of air classics faucet, electromagnetism interface O of the eduction after pneumatics machine is started and A send to various discharge to carry on one's shoulder or back implement, the pneumatics machine sky that finish carries start. After it is normal that when pneumatics machine the sky that finish records the movement that start, restore the faucet to come original position, the faucet is shut, pneumatics machine begins the work (to load) . Pressure lifts gradually, lift when pressure when the pressure of one level set (0.

5Mpa) , pressure expresses B1 to often shut contact to break ＇ of KA1 of coil of commencement auxiliary relay to cut off the power, often shut contact restoration to put through. Exhaust pressure continues to rise, when the discharge that achieves one level set pressure of carry on one's shoulder is worth (0.

55MPa) when, pressure watch B1 often opens contact to close make electrify of coil of auxiliary relay KA1, often open contact to close, electrify of coil of electromagnetism valve D1, make P of interface of electromagnetism a powerful person is interlinked with A. Compress air to pass one A of P to send to discharge to carry on one's shoulder or back implement, make discharge carries on his shoulder or back implement movement, complete process of carry on one's shoulder of one class discharge. Manage together, lift as pressure continuity, 2, 3 class discharge carries on his shoulder or back implement discharge carries on his shoulder or back. As the continuance of process of discharge carry on one's shoulder, systematic pressure is reduced gradually. Fall when pressure under 0.

When 55MPa, although pressure expresses B1 to often open contact to restore,disconnect condition, but because auxiliary relay KA1 still is in,suck close position, its often open contact to still close be in lock up condition oneself, JVD1 of electromagnetism a powerful person continues to hold open position. Drop when pressure to 0.

When 5MPa, electric contact pressure expresses B1 to often shut contact to restore on-state, make auxiliary relay KA1 is sucked thereby close, often shut contact to disconnect, make relay KAI cuts off the power, release often open contact to make its are in disconnect condition, make JVD1 of electromagnetism a powerful person cuts off the power to restore savagery thereby, interface P is shut, a and O are interlinked, make discharge carries on his shoulder or back implement the compression in reaching pipeline air passes one O of A National People's Congress of one faucet ease is angry, discharge carries on his shoulder or back implement quit the job, pneumatics machine returns regular job (to load) condition. From 0.

55MPa discharge carries on his shoulder or back 0.

The process of 5MPa to load controls the working journey likeness of a powerful person with pressure, solved onefold report signal to cause a system thereby the difficult problem of frequent movement. 2, principle of carry on one's shoulder of 3 class discharge is same, distinction depends on what taking pressure value to differ. The main job component of system of carry on one's shoulder of the discharge after transforming turns into by a powerful person of original mechanical pressure control electromagnetism type reversal valve. Both photograph is compared, latter has adjust simple spot of convenient, each pressure is precise without by accident, the action is quick quick, cost low, maintenance is convenient wait for a characteristic 2 need note a problem: The list of electric contact pressure that uses in the system cannot bear acuteness vibration, should notice to decrease when transforming installation accordingly brace up or alone bracket is made install in pneumatics plane side, prolong the service life of yuan of parts of an apparatus in order to ensure the accuracy that the system works, stability is reached. Can make work station according to need at the same time, implementation is remote (duty room) operation and monitoring. CNC Milling