60results about How to "Realize air tightness detection" patented technology

The invention relates to an air tightness detector for a photoelectric instrument. The air tightness detector comprises a nitrogen on-line quality analysis module, a first air inflation channel, a second air inflation channel and a single-chip microcomputer control circuit, wherein the nitrogen on-line quality analysis module is formed by connecting a dew-point meter, a nitrogen purity analysis meter and a digital type pressure meter; the first air inflation channel is formed by connecting a first precise pressure reducing valve, a first magnetic valve and a first digital type pressure switch; the second air inflation channel is formed by connecting a second precise pressure reducing valve, a second magnetic valve and a second digital type pressure switch; the single-chip microcomputer control circuit is connected with each component, and the air quality of an input air source and the air inflation time, air inflation pressure and other indexes of the air inflation of the photoelectric instrument are monitored in real time. The air tightness detector for the photoelectric instrument disclosed by the invention is suitable for the air tightness detection of inner cavities of various precise photoelectric instruments, and can be widely used for the air tightness detection of newly developed or repaired photoelectric instruments in a photoelectric instrument development organization or repair factory.

The invention provides an oil-filled motor, belonging to the technical field of motor equipment. The oil-filled motor solves the problems that a hole needs to be formed in an upper cap and the operation is tedious when the existing oil-filled motor is subjected to airtightness detection. The oil-filled motor comprises a motor cylinder, an upper bearing pedestal and an upper cap, wherein the upper bearing pedestal is fixed connected to the end part of the motor cylinder, the upper cap is fixed connected on the upper bearing pedestal, a detection hole is formed on the upper bearing pedestal, an outgoing wire sheath is fixedly inserted in the detection hole, a wire passing hole is formed in the outgoing wire sheath along the axial direction, one end of the outgoing wire sheath extends into an oil cavity, a limiting part is arranged on the outer circumferential wall of the end extending into the oil cavity, and the end, extending into the oil cavity, of the outgoing wire sheath is further provided with a leading-in structure which can guide a gas in the oil cavity to extrude the outgoing wire sheath and passes through a space between the outer circumferential wall of the outgoing wire sheath and the hole wall of the detection hole. When the oil-filled motor provided by the invention is subjected to airtightness detection, the hole does not need be formed in the upper cap, and the airtightness of the gas cavity and the oil cavity can be detected simulatenously in a single test.