5results about How to "Reduced flow cross section" patented technology

The utility model relates to a functional element used for heating cigarettes, which comprises a channel pipe with a groove, a plugging piece is arranged in the middle of the channel pipe, the periphery of the plugging piece is fixedly connected with the inner wall of the channel pipe, and one or more channels extending axially are arranged between the plugging piece and the channel pipe. The utility model has the advantages that: the plugging piece with the through hole is arranged in the channel pipe with the openings at the two ends, so that a good plugging effect is achieved on the fuming material, the fuming material is kept not to generate large displacement when the heater is inserted, and a good fuming effect is ensured; meanwhile, by means of the through hole of the plugging piece and the channel pipe groove, smoke aerosol formed by the cigarette can be effectively cooled when flowing through the channel pipe, and a user can obtain better smoking experience during smoking.

The utility model discloses a civil engineering material cutting device relates to cutting device technical field, including the scrap collecting box, filter screen, horizontal setting in the scrap collecting box, the cavity in the scrap collecting box is divided into upper mixing area and lower separation area, transmission pipe, its exhaust end penetrates the scrap collecting box and extends to the mixing area, and the section of exhaust end close to the top wall of mixing area is constructed as the flexible part, drive source, is located the scrap collecting box outside, the utility model discloses when transmission pipe exhaust end swings to the limit position of both sides of fan -shaped track, the maximum deformation of bellows flexible part leads to the obvious reduction of through -flow cross section, and airflow velocity reduces, thereby reducing the impact force of filter screen edge. After the airflow impact mixing area side wall, the airflow diffusion covers the filter screen edge, realizes the filtering effect of the difference of the impact force of edge and central region air flow balance, guarantees the filtering even, and also protects the filter screen structure, especially fragile installation position, reaches the filtering purpose of high efficiency and durable.

The application discloses a semiconductor processing device, a pressure control method and an opening degree valve. The semiconductor processing device divides a process cavity into a first cavity (a substrate processing area) and a second cavity (a pre-evacuation area) through a cross section control part, and the cross section control part can adjust the size of a flow cross section between the two cavities. The pressure control method is as follows: a vacuum pump continuously evacuates the second cavity; when the pressure is increased, the flow cross section is reduced (and is kept greater than zero), so that low-pressure process gas of a previous stage is smoothly discharged, and meanwhile, the first cavity is increased in pressure, and the second cavity forms a low-pressure area; when the pressure is decreased, the flow cross section is increased, and the pressure decrease of the first cavity is realized by utilizing the pressure difference between the two cavities. The opening degree valve adopts a structure in which a baffle and a coaxial rotating shielding piece are matched, and only directional rotation is needed to realize the switching of the opening degree. The scheme improves the pressure switching speed and is suitable for semiconductor processes which need frequent and rapid pressure adjustment.

This application provides a hydraulic clearance adjuster, an engine, and a vehicle. The hydraulic clearance adjuster includes: a housing; at least a portion of a plunger disposed within a first receiving cavity, with an oil drain channel formed between the outer peripheral surface of at least a portion of the plunger and the side wall of the first receiving cavity, and a first working cavity formed between the bottom of the plunger and the bottom of the first receiving cavity, the plunger being movably disposed relative to the housing to change the volume of the first working cavity; a first annular gap formed between the inner ring of a seal and the outer peripheral surface of the plunger, the first annular gap communicating with the first working cavity; a second annular gap formed between the outer ring of the seal and the inner side wall of the housing, the second annular gap communicating with the oil drain channels located on both sides of the seal; and a communicating channel formed on at least one of the seal and the housing, the communicating channel communicating with the oil drain channels located on both sides of the seal. The hydraulic clearance adjuster dynamically adjusts the flow cross-section of the oil drain channel according to the oil pressure, thereby precisely controlling the hydraulic stiffness damping.

The utility model provides a variable cross-section pipeline device for dynamic hydraulic balance of a central heating system, which relates to the technical field of variable cross-section pipeline devices and comprises a branch pipe, an adjusting mechanism is arranged in the branch pipe and comprises a hose, and the outer surface of the hose close to a port is fixedly connected with the inner wall of the branch pipe. According to the device, the hose is fixed to the inner wall of the branch pipe, then the hose can be driven and extruded through cooperation of the four shaping plates, the four sliding plates and the four springs, the flow section in the branch pipe is reduced, and after the internal pressure intensity of the branch pipe and the hose is enhanced, the hose can be pushed to be expanded; according to the device, the supporting plate is arranged on the supporting plate, so that the four shaping plates, the four sliding plates and the four springs can be pushed to diffuse outwards, the flowing cross section can be gradually increased, the springs can be protected through the telescopic rods, the springs are prevented from being bent, meanwhile, the sliding plates can be supported and limited through the telescopic rods, and the moving tracks of the sliding plates and the supporting plate are more stable.