9results about How to "Barometric balance" patented technology

This invention relates to the field of aero-engine bearing testing technology, and discloses a bearing testing device, including a main shaft, a test bearing assembly, a sealing structure, and a maintenance assembly. The test bearing assembly includes a first bearing housing and a test bearing. The first bearing housing has a first air inlet. The adjusting ring of the maintenance assembly has a first end and a second end. An oil injection ring is spaced apart from the second end to form a sealing channel. A stationary ring is connected to the oil injection ring and positioned close to the second end. The first air bleed channel of the oil injection ring communicates with the second air bleed channel, and the first air bleed channel communicates with the first air inlet. The other end of the second air bleed channel communicates with the sealing channel. This invention, through the spaced arrangement of the rotating and stationary rings and the airflow guidance of the sealing channel, introduces high-temperature gas through the first air inlet of the first bearing housing and guides it into the sealing channel, recreating a real sealing scenario. This makes the bearing test verification more comprehensive and closely resembles the actual working condition, significantly improving the reference value of the test data.

This invention relates to an electronic expansion valve, comprising a drive assembly, a screw, a valve needle, a valve seat, a bearing, and a valve needle spring. The valve seat has a fluid passage. The drive assembly drives the screw to rotate and move axially. The valve needle has an axial mounting hole inside, and its upper part has a bearing cavity to accommodate the bearing. The lower end of the screw extends into the axial mounting hole and is rotatably connected to the bearing, allowing for axial sliding. A screw retaining ring is provided at its lower end, and a screw annular protrusion is provided on its outer periphery. The valve needle spring is sleeved on the screw and confined between the screw annular protrusion and the upper end face of the valve needle. Downward movement of the screw compresses the valve needle spring through the screw annular protrusion, pushing the valve needle downward. Upward movement of the screw pushes the valve needle upward through the screw retaining ring against the bearing, thereby achieving stable axial movement of the valve needle to precisely control the opening and closing of the fluid passage. This structure achieves pure axial transmission through the bearing, effectively preventing the valve needle from rotating and vibrating with the screw. The compact layout of the valve needle spring significantly shortens the axial dimension of the valve body, improving transmission reliability and service life.

This utility model provides a handle structure and its refrigeration device, which is set on the opening side of the refrigeration device door. The refrigeration device includes a door and a housing. The edge of the door is provided with a door seal. The handle is characterized by including an outer handle and an inner handle. The outer handle is fixedly connected to the door. The inner handle includes a connecting rod, an inner handle frame, and a partition. The connecting rod has a scissor-fork structure with a short lever arm and a long lever arm. A strip-shaped connecting hole is provided at the intersection of the connecting rods. A hinge pin is provided in the strip-shaped connecting hole and is slidably hinged to the connecting rod. The hinge pin is located on the side wall of the door. The inner handle frame is located inside the outer handle and is hinged to the long lever arm side of the connecting rod. The partition is located between the door seal and the housing. The connecting rod transmits the pulling force of opening the door to the partition, separating the door seal from the housing to create an opening so that some air can enter the housing from the opening, thereby balancing the air pressure inside and outside the housing. This handle makes opening the door easier.

This utility model discloses a nano-coating atomization device for automotive headlight coating, comprising a material tank, a liquid pump, and a double-layer cylinder. The upper surface of the material tank is provided with an ultrasonic disperser, a pressure relief pipe, and an air inlet. The liquid pump is installed on the side of the material tank and communicates with it. The outlet of the liquid pump is connected to an ultrasonic nozzle. The double-layer cylinder is screwed to the ultrasonic nozzle. The lower surface of the double-layer cylinder is provided with several trapezoidal spray holes arranged in a ring. After the liquid pump draws the material, it is sent to the ultrasonic nozzle, which atomizes and sprays the material. The air inlet provides compressed air to the double-layer cylinder. The compressed air is sprayed out from the trapezoidal spray holes to form an annular air curtain. The airflow carries the material to the surface of the headlight, reducing material dispersion and improving the efficiency of headlight coating.

The utility model discloses a cup cover and cup, the cup cover includes the cover body, has the through -hole on it, the pipe body passes through the through -hole and with the cover body sliding cooperation, and the pipe body is equipped with the elastic member on, the plug piece is used for sealing the pipe body, the unlocking piece is located on the cover body, the pipe body is in the open state when the cup cover is in the initial state, and the end portion is located the cover body outside, the pipe body end portion is sealed and is located the cover body in when the cup cover is in the closed state, the plug piece is locked through the unlocking piece, the unlocking piece releases the plug piece and locks when the cup cover is in the open state, the elastic member restores the pipe body to the initial state, the utility model discloses the pipe body is set into with the cover body sliding cooperation, and the use is cooperated the elastic member, when drinking water, the unlocking piece is stirred, makes the pipe body whole movement and pops out a distance outward, avoids the damage to the pipe body, has improved the life.

The utility model discloses a kind of anti scalding double-layer PET milk tea cups, it is related to water cup technical field, including cup body, the cup body upper end is provided with cup cover;The cup body adopts double-layer setting, including outer wall, inner wall, cavity is arranged between outer wall and inner wall;The outer wall adopts PET material, the inner wall adopts modified PCT material;The inner wall upper end edge forms cup mouth ring, the cup mouth ring lower end is provided with connecting groove;The outer wall upper end is connected with connecting ring, the connecting ring is located in connecting groove, and both are connected by high-temperature-resistant sealant;Paste formula thermometer is provided in the cavity.The utility model design structure is reasonable, it passes through and adopts double-layer cup body structure, outer wall adopts PET material, inner wall adopts modified PCT material, cavity is set in the middle, can effectively block heat transfer, play good anti scalding effect, while inner wall modified PCT high-temperature-resistant characteristic, avoid the risk of harmful substance migration caused by PET directly contact high-temperature beverage.

The application provides an underwater hydraulic hoist, which comprises a hydraulic cylinder, a piston rod and a power assembly, the piston rod extends out of the hydraulic cylinder to form an outer acting part, further comprises a flexible protection assembly and a filter assembly, the flexible protection assembly, the hydraulic cylinder and the outer acting part are sealingly connected to form a flexible bin, and the flexible bin is in communication with the filter assembly. The filter assembly comprises a filter, the filtering-out end of the filter is sealingly connected with the flexible bin, and a check valve is arranged at the filtering-in end. A breathing pipe is arranged in a cable assembly. The underwater hydraulic hoist provided by the application can ensure that the outer acting part of the piston rod is separated from the external dirty water body through the flexible protection assembly and the filter assembly, and prevent the piston rod from being damaged or leaking due to scaling and the like. The application has the advantages of simple structure, reliable operation, convenient installation and the like.

This application relates to the field of medical care and discloses an intelligent pneumatic positioning care system. This system enables elderly individuals to safely transition from a lying to a sitting position without changing their existing bed, providing ample lateral support throughout the process to prevent rollover or falls. The system includes: a wedge-shaped main air cushion, used to elevate the upper body from a lying to a sitting position after inflation; two side air cushions, respectively located on both sides of the main air cushion's upper surface, used to provide lateral support after inflation; and a one-way valve with an opening pressure, located between the side air cushions and the main air cushion. When the pressure difference between the side air cushions and the main air cushion is greater than the opening pressure, the one-way valve opens, allowing gas from the side air cushions to enter the main air cushion; when the pressure difference is less than the opening pressure, the one-way valve closes, cutting off the gas connection between the side air cushions and the main air cushion.