Method of restraining oil pollution in resonant cavity of gas laser
A technology in gas lasers and resonators, which is applied to lasers, laser components, phonon exciters, etc., can solve the problems of optical system damage, deterioration of resonator discharge effect, and influence on the stability and service life of gas lasers. To achieve the effect of inhibiting oil and gas from seeping into the resonant cavity and improving the vacuum degree
Active Publication Date: 2015-01-07
HANS LASER TECH IND GRP CO LTD +1
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Problems solved by technology
Gas lasers (mainly fast axial-flow and fast cross-flow lasers) need Roots pumps or turbo fans to drive the flow of working gas, and after the Roots pumps or vortex fans are shut down, the temperature of the lubricating oil in the Roots pumps or vortex fans is very high. High, due to the high temperature, the lubricating oil volatilizes to form oil gas, which enters the resonant cavity through the gap between the shaft and the pump body, and deposits inside the resonant cavity and on the optical lens after cooling. Long-term accumulation of oil and gas will lead to poor discharge effect of the resonant cavity and optical system damage, which seriously affects the stability and service life of the gas laser
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[0025] The technical solutions of the method and system for suppressing oil pollution in the resonator cavity of a gas laser will be described in detail below in conjunction with specific embodiments and accompanying drawings, so as to make it more clear.
[0026] Such as figure 1 Shown, in one embodiment, a kind of method for suppressing oil pollution in the resonant cavity of gas laser, comprises the following steps:
[0027] Step S110, after it is detected that the driving device is shut down, the vacuum pump is controlled to continue to run, and the vacuum pump is controlled to extract the air pressure in the resonance cavity.
[0028] Specifically, the gas laser includes a resonant cavity, a vacuum pump, and a driving device. The vacuum pump is connected to the resonant cavity, and the driving device drives the flow of the working gas in the resonant cavity. The driving device is a turbo pump or a Roots pump.
[0029] After the turbo pump or Roots pump is turned off, co...
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The invention relates to a method and a system of restraining oil pollution in a resonant cavity of a gas laser. The method includes the steps of controlling a vacuum pump to continuously operate and extracting gas in the resonant cavity after an actuating device is detected to be shut down, back charging protective gas into the resonant cavity and controlling the vacuum pump to continuously operate when pressure in the resonant cavity is less than or equal to first preset pressure caused by the extracted gas, and controlling the vacuum pump to stop operating when the pressure in the resonant cavity is greater than or equal to second preset pressure caused by the back-charging protective gas, wherein the first preset pressure is less than the second preset pressure. The method and the system of restraining the oil pollution in the resonant cavity of the gas laser has the advantages of being capable of improving vacuum degree through delay of gas extracting, effectively restraining the oil gas to seep into the resonant cavity due to the fact that the protective gas is charged with assistance of vacuumizing, improving stability of the gas laser and prolonging service life of the gas laser.
Description
technical field [0001] The invention relates to the field of laser equipment, in particular to a method for suppressing oil pollution in a resonant cavity of a gas laser. Background technique [0002] With the widespread use of high-power gas lasers in cutting, welding, cladding and other fields, the demand for high-power gas lasers in domestic and foreign processing markets is on the rise year by year. While a large number of imported high-power gas lasers are pouring into the market, domestic high-power gas lasers are also gradually rising, and their processing and use performance have gradually approached foreign high levels. [0003] The core component inside the laser is the resonant cavity. The cleanliness of the resonant cavity directly affects the stability and service life of the resonant cavity to a large extent. Gas lasers (mainly fast axial-flow and fast cross-flow lasers) need Roots pumps or turbo fans to drive the flow of working gas, and after the Roots pump...
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IPC IPC(8): H01S3/036
Inventor 李建彭金明詹敏陈根余陈燚高云峰
Owner HANS LASER TECH IND GRP CO LTD