A ,, ZJ series Roots vacuum pump works: Roots vacuum pump works with both volume pump works, there are molecular pump suction effect. Due to the continuous rotation of the rotor, is drawn from the gas sucked Roots vacuum intake port to the inner space V0 between the rotor and the pump casing, inspiratory V0 space is completely closed state. With the rotation of the rotor, closed V0 space communicates with the exhaust port, due to the higher side of the exhaust gas pressure, causes a portion of the gas over the recoil, so that the gas pressure inside the space V0 sudden increase. When the rotor continues to rotate in the V0 gas enclosed space, along with the original recoil gas is discharged together with the Roots pump outside. At this time, the rotor and from the Roots vacuum sealed entrance V0 volume of gas. Roots vacuum due to continuous operation, so that the two rotors kept forming a closed space V0 also kept the gas within the enclosed space chi discharge pump, but in order to achieve the two ZJ series Roots vacuum pump Overview: ZJ series Roots a vacuum pump, a non-variable displacement internal compression rotary vacuum pump, also known as a mechanical booster pump, having the advantage of a higher exhaust rate at a lower inlet pressure, it is obtained in a high vacuum of the main pumping One gas equipment, it works similar to the Roots blower, mainly by a pair of synchronized high-speed rotation of the "8" shaped rotor and pump chamber consisting of two semi-circular (Figure 1). ZJ series Roots vacuum pump exhaust alone can not be with a pump (such as slide valve pumps, rotary vane vacuum pumps, water ring vacuum pumps, oil ring pumps, etc.) used in tandem until the pressure in the system is pumped by the front stage vacuum pump When pumped Roots vacuum pressure can accept to start work, otherwise it will overload and overheating and damage. Front air intakes on the front stage pump series ZJ series Roots vacuum pump unit can increase the degree of vacuum before the pump, greatly improved in the effective pumping speed range. Minimum limit pressure ZJ series Roots vacuum pump ultimate pressure is determined by the pre-pump, the technical parameters of the data table configuration is standard (equipped with two-stage vacuum pump mechanical seal) is used. ZJ series Roots vacuum pumps in a wide pressure range (1 ~ 1 × 10 4pa) have a greater pumping speed was pumping gas for dust and water vapor does not contain sensitive, so widely used in vacuum casting, vacuum melting vacuum degassing, vacuum coating industry and the chemical and pharmaceutical industry, vacuum distillation, vacuum drying. Three, ZJ series Roots vacuum pump features: within 1 ZJ series Roots vacuum pumps operate without friction parts, do not lubricate the pump chamber without oil, vacuum cleaner available. Greater pumping rate within two wide pressure range. As before acting on the pump used to provide its high pumping speed and ultimate vacuum "accelerator." 3, ZJ series Roots vacuum pump cavity vertical gas flow to be drawn in favor of exclusion of dust and gas condensate. 4, smooth ZJ series Roots vacuum pump is completely symmetrical and precise balancing of the rotor operation, and reliable. 5, compact design with vertical and horizontal two exhaust ports for easy installation. 6, small mechanical friction losses, so the drive power is small. 7, easy to maintain and repair, low cost, high life. . 7, vibration, noise. 8, can be exhausting gas condensate pump ZJ series Roots safe, ZJP series itself is equipped with a pressure relief valve from the automatic protection. 9, to prevent oil spills and emulsification - import seal the shaft extension seal, seal composite structure design use. I produced the Roots vacuum pump has the following characteristics: 1, to improve the Roots pump bearing cavity structure commonly used lubricant for cooling, lubrication, if the part is emulsified oil pump new oil must be replaced immediately, otherwise it will cause corrosion of bearings The vibration caused by the pump, the noise becomes large, this time as we do not timely replacement of bearings, gear wear is exacerbated causing damage to the entire pump. 2, for the current Roots vacuum pump with water ring vacuum pumping a large amount of water vapor and organic solvent pump oil readily emulsified old problems, I seal the pump chamber structure were important improvements: between the pump chamber and the bearing cavity increasing the FPM or PTFE flexible seal in the pump chamber and sealed bearing chamber, so as to solve the emulsification Roots pump oil. The sealing structure after years of use has been fully validated. 3, treatment Roots vacuum pump cavity surface in pumping a large amount of water vapor and chemical solvents, the rotor surface and pump cavity surface prone to corrosion phenomena, often test a few days after the death of the Roots pump rust unused unable Jibei operation; or after a long time out, when the pump is turned on again rust; or after prolonged use of the rotor and the pump chamber is found to affect the corrosion performance of the pump. For all the above phenomenon I rotors and Roots vacuum pump cavity wall were all nickel plated, nickel-plated Roots vacuum after corrosion, rust greater capacity. 4. Improved backlash between a rotor-type line is the biggest factor affecting the performance of the Roots pump. Meshing clearance between the rotor Roots vacuum pump should pump to achieve uniformity in ensuring stable operation of the premise, to a minimum. Yin Luoci rotor type line theory and the actual processing of the type of line there is a certain bias, after my company engineers repeatedly amended machined rotor profile is more uniform, in order to fully guarantee the performance of the pump. By comparison test, the type of line improved performance can be comparable with imported products. All castings are made of metal model, resin sand molding, casting surface quality is good, no play tired, direct painting, more conducive to heat pump; bearings used in all NSK Bearings, and fully guarantee the stability and service life of the pump running. Gear used in all six grades above the national standard gear, all the gears are high-frequency quenching, grinding teeth grinding in order to ensure stable operation of vacuum pumps and low noise. ZJ series Roots vacuum all surfaces spray quality epoxy paint, acid, high temperature, durable does not change color.