40results about How to "Reduce contact gap" patented technology

Disclosed is a multistage dry vacuum pump which is simple and compact in structure, needs only few components, is optimal in cooling performance, cheap in material cost, does not get thermally deformed, can completely discharge gas through increase of backpressure, and has increased facility vacuum degree. The multistage dry vacuum pump comprises multistage cylinder bodies, coupled rotors, coupled pump shafts, a motor, coupled gears, gas channels, internal cooling channels, external cooling channels and a cooling fan, wherein each multistage cylinder body has internal accommodation space, a sucking portion on one side and a discharging portion on the other side; the coupled rotors are accommodated in the internal accommodation space of the cylinder body and rotate in a mutually engagement manner; the coupled pump shafts are engaged with the rotors; the motor drives at least one pump shaft; the coupled gears are installed at the pump shafts and rotate synchronously with the shafts; the gas channels are communicated with the internal accommodation space of the multistage cylinder body and are formed into a spiral shape on an outer surface of each cylinder body; the internal cooling channels are formed into a concentric shape on inner sides of the gas channels, and axially penetrate through the cylinder bodies surrounding arc-shaped shafts on two sides of the internal accommodation space; the external cooling channels are concentrically surrounding arcs on outer sides of the gas channels; and the cooling fan is disposed at a connection part position of the motor and the pump shafts.

The invention discloses a cleaning device capable of cleaning snail cracks, which comprises a support mechanism for turning the device over, a cleaning mechanism for cleaning screw slits, and a rotating mechanism for squeezing snails. The inner wall of the support mechanism is welded with two Bearings, the inner wall of the support mechanism is fixedly connected to the rotating mechanism through the provided bearing, the outer wall of the rotating mechanism is welded with a connecting rod, and the outer wall of the rotating mechanism is welded with a cleaning mechanism through the provided connecting rod. Each side of the mixing bucket is a curved quadrilateral. During the rotation of the mixing bucket, when the snails rotate from the concave part of the mixing bucket to the raised part, the snails will keep moving and scrub each other. The arc of the mixing bucket Smaller, the snails will not only accumulate in the recess of the mixing bucket, the coil spring will swing around irregularly during the rotation process, the coil spring is helical, and the snail is also helical, when the coil spring passes through the outer surface of the snail , it will be easier to clean the dirt in the crevices of the snails.

The invention provides a foaming effect evaluation device for a chemical agent. The foaming effect evaluation device comprises a foaming pipe and a view window container, wherein an inlet end of the foaming pipe is connected with a gas bottle and a foaming liquid container, respectively; and a movable piston is arranged in the view window container, a foaming cavity is formed between the piston and the bottom wall of the view window container, an injection hole is formed on the bottom wall of the view window container, the foaming cavity is communicated with an output end of the foaming pipe through an injection hole, a discharging pipe is inserted into the piston, a plurality of view window holes are formed in the peripheral wall of the view window container, and observation mechanisms are arranged in the view window holes. The invention further provides a foaming effect evaluation method for the chemical agent. The foaming effect evaluation method comprises the following steps: moving the piston to set the volume of the foaming cavity; vacuumizing the foaming cavity; introducing gas and foaming liquid to enter the foaming pipe to be mixed, and injecting the gas and the foaming liquid into the foaming cavity through the injection hole for foaming; and observing the foaming height in the foaming cavity by virtue of the observation mechanisms. The volume of the foaming cavity is adjusted by moving the piston, so that the requirements on different foaming volumes of various chemical agents are met, and the evaluation of the foaming effects of the chemical agents is realized.

The invention discloses a flower basket conveying line. The flower basket conveying line comprises an upper conveying line, a lower conveying line and a corner conveying line, wherein the upper conveying line and the lower conveying line are arranged in a staggered way, the conveying directions of the corner conveying line and the lower conveying line are same, the height of the corner conveying line is lower than that of the upper conveying line, two ends of the corner conveying line are respectively arranged in the upper conveying line and the lower conveying line, the corner conveying line is configured with an ejection mechanism, and a lower concave part is arranged at a position, corresponding to a transition position of the upper conveying line and the lower conveying layer, on the corner conveying line and is used for avoiding the upper conveying line during rising. The conveying method of the flower basket conveying line comprises the steps of transmitting a flower basket to a part above the corner conveying line along the upper conveying line; driving the corner conveying line to rise by the ejection mechanism, and transmitting the flower basket to the corner conveying line; starting the corner conveying line, and transmitting the flower basket along the lower conveying line; and transmitting the flower basket to a part above the lower conveying line, driving the corner conveying line to descend by the ejection mechanism, and transmitting the flower basket onto the lower conveying line. The flower basket conveying line has the advantages of small contact gap, transmission stability, low debris rate and the like.

An embodiment of the present invention provides a method for preparing an all-solid-state battery, which relates to the technical field of batteries. The method comprises: pressing the solid electrolyte powder into an electrolyte sheet, mixing lithium cobaltate, polyvinylidene fluoride, carbon nanotubes and N-methyl-2-pyrrolidone in a mass ratio of 40:9:8:6, and configuring the Mixed solution, the mixed solution according to 0.1mg / cm 2 The amount of the electrolyte sheet was dropped on the surface of the electrolyte sheet, dried, sprayed gold on the surface of the electrolyte sheet, and sintered at 700°C for 0.5h to obtain the target electrolyte sheet, and assembled the battery with the target electrolyte sheet. By covering the cathode material gold film on the surface of the electrolyte, and then heat treatment, the contact gap between the active material and the electrolyte in the assembled battery can be greatly reduced, and the discharge of organic matter in the battery can reduce the internal resistance of the interface and avoid falling off. problems, improving the energy density and cycle stability of all-solid-state batteries.

The invention discloses a folding wing mechanism of a loitering bomb, which comprises a gear, a rack, a bottom fixing plate, an upper splint, a spring unit, an unfolding locking mechanism and a folding locking mechanism. The bottom fixing plate is fixed on the top of the bomb body, and its upper surface There are long guide grooves, which are parallel to the central axis of the body; the upper and lower rotating shafts of each gear are respectively inserted into the two bearing inner rings, and the two bearing outer rings are respectively inserted into the holes of the upper splint and the bottom fixing plate; the rack is A straight plate member with meshing teeth on both sides, the meshing teeth on both sides mesh with two gears respectively, its rear end is connected with the spring unit, the spring unit is fixed on the bottom fixing plate, and a positioning pin is installed on the lower surface of the rack. The positioning pin slides along the guide groove, and the upper clamping plate is fixed on the bottom fixing plate through the connecting piece. The invention has high motion reliability and stable unfolding process, and can realize unfolding and locking of the folding mechanism.

The invention belongs to the technical field of filters, and particularly relates to a check valve sheet for filters. The check valve sheet comprises a boss-shaped sheet body and a conical ring surface, an annular protrusion is arranged on a part, at an annular outer edge, of the conical ring surface, an annular step is arranged on the outer wall of the boss-shaped sheet body, two annular sealing protrusions are arranged on the outer wall of the annular step, the distance between the annular sealing protrusions is 3-5mm, a stepped through hole is formed in the center of the boss-shaped sheet body, and a step of the stepped through hole is of an annular structure. Contact gaps between the check valve sheet and an inlet pipe as well as between the check valve sheet and a spool can be effectively decreased, integral sealability and abrasion resistance can be improved, and fuel efficiency of an engine can be increased. The check valve sheet is simple in structure, wide in application range and long in service life.