32results about How to "Reduce lateral friction" patented technology

The invention discloses a large wind tunnel test section replacement method. The purpose is to solve the problem that according to an existing wind tunnel test section transportation mode, travellingmechanisms turn inconveniently or positioning is not accurate during replacement. According to the large wind tunnel test section replacement method, test section transportation vehicles are adopted for conducting test section transportation and replacement, a test section is not provided with travelling mechanisms, and through lifting, 90-degree turning of wheels and freely parallel operation ofthe multiple vehicles of the test section transportation vehicles, turning of the wind tunnel test section is achieved; meanwhile, a V-flat slideway mode is adopted for positioning wind tunnel test stations of the test section, round liquid hydrostatic bearings are arranged on the test section transportation vehicles and are used for reducing transverse friction force when the test section falls into a slideway, and through cooperation of the V-flat slideway, the wind tunnel test section and the round liquid hydrostatic bearings, the wind tunnel test section is precisely positioned. By means of the large wind tunnel test section replacement method, the problems that during wind tunnel test section transportation and replacement, positioning is not accurate, and the travelling mechanisms need to turn can be effectively solved, so that the large wind tunnel test section replacement method has a high application value.

The utility model relates to a two-guided and lubricated automobile shock absorber capable of reducing wear and enhancing vibration damping effect. The technical solution is: including an oil storage cylinder, a working oil cylinder is arranged inside the oil storage cylinder, the bottom of the oil storage cylinder and the bottom of the working oil cylinder are connected through a bottom valve, a piston device is arranged in the working oil cylinder, and a first guide is set on the upper part of the working oil cylinder. There is a second guide sleeve on the top of the first guide sleeve, the upper and lower end faces of the two guide sleeves are connected, the two guide sleeves are sleeved on the piston rod through the guide bearing, and an oil seal is arranged on the top of the second guide sleeve. The feature is that conduits are respectively arranged on the connecting rod shafts at both ends of the piston, and shut-off spring brackets are arranged on the two end faces of the conduits connected to the piston, and shut-off springs are arranged oppositely on the shut-off spring brackets, and on the top of the first guide sleeve An oil storage tank is provided, an oil return hole of the first guide sleeve is provided on the first guide sleeve through the upper and lower surfaces of the first guide sleeve, a ring groove is provided on the top of the second guide sleeve, and a second guide sleeve is provided on the inner wall of the ring groove. The oil return hole of the guide sleeve, the oil return hole of the first guide sleeve communicates with the oil return hole of the second guide sleeve, and the lower end of the oil return hole of the first guide sleeve communicates with the oil storage cylinder.