58results about How to "Adjust the amount of compression" patented technology

The invention discloses a self-stabilization single-face thin film restrictor with a prepressure adjusting function. The problem of adjusting prepressure of the single-face thin film restrictor and the problem that prepressure cannot adapt to the working condition are solved, the effect of adjusting prepressure of the restrictor is achieved, and therefore the restrictor is capable of meeting the application requirement of working condition changes. Prepressure fluctuation can be automatically stabilized to stably control the throttling gap and realize the ideal throttling ratio. According to the technical scheme, the self-stabilization single-face thin film restrictor comprises an upper valve body and a lower valve body, an elastic thin film is arranged between the upper valve body and the lower valve body, a prepressure cavity is formed between the bottom of the upper valve body and the elastic thin film and communicated with a throttling conical hole, an adjusting stud is arranged in the throttling conical hole, an upper oil outlet hole is formed in the adjusting stud, and a throttling conical valve is arranged in the upper oil outlet hole through an elastic element in a supported mode; a throttling cavity is formed between the bottom of the lower valve body and the elastic thin film, a throttling table is arranged at the top of the lower valve body, and the throttling cavity is communicated with a lower oil outlet hole through a throttling gap between the throttling table and the elastic thin film.

The invention discloses a support frame, which comprises a column, a rocker arm, a tray, an adjustment shaft, and a fixed block. The column is arranged vertically, and the rocker arm is arranged horizontally. The column and the rocker arm are connected by hinges. The rocker arm includes a horizontal support tube. , the horizontal support tube is connected to the hinge, the horizontal support tube is a hollow circular tube, the adjustment shaft is set inside the horizontal support tube, one end of the adjustment shaft is provided with an elastic piece, one end of the elastic piece is connected to the adjustment shaft, and the other end is connected to the column or hinge. The support tube is provided with a plurality of U-shaped grooves, the fixed block is arranged outside the horizontal support tube, the fixed block passes through the U-shaped groove and is connected with the adjustment shaft, and the tray is connected with the fixed block. The tablet device can be placed on the pallet. The U-shaped groove of the horizontal support tube provides two positions for the pallet, that is, the position when the device needs to be placed and the position when the device is not placed. By rotating the adjustment shaft, the fixed block or the connected fixed block The adjustment of the angle of the tray can be realized by locking the screw of the adjustment shaft in a different position of the U-shaped groove.

The invention discloses a new type of aerobics stepping and jumping training device, which relates to the technical field of fitness equipment and mainly aims to solve the problem that the existing device cannot adjust the stepping and jumping training strength; A telescopic rod, the outer part of the telescopic rod is provided with a first spring, the lower part of the telescopic rod is provided with an external thread section, and the threaded section of the external thread is connected with a second magnet ring, and the lower surface of the stepping board is installed outside the telescopic rod. There is a first magnet ring, the magnetic poles of the first magnet ring and the second magnet ring are opposite, a buffer mechanism is also provided between the base plate and the stepping board, a base plate is provided under the base plate, and an adjustment mechanism is provided between the base plate and the base plate. There is a first magnet ring and a second magnet ring. By rotating the second magnet ring, the effect of the initial force on the stepping board can be adjusted. A buffer mechanism is provided to further adjust the effect of stepping and jumping strength; an adjustment mechanism is provided , can adjust the inclination angle of the springboard.

The invention relates to a bearing constant-pressure pretightening device and a selective assembly method thereof, wherein the bearing constant-pressure pretightening device comprises a first bearing, a second bearing and a preloading component; the first bearing is fixedly arranged; the second bearing is available for adjusting axial adjustment activities; the preloading component abuts against a free end of the second bearing; the preloading component is a compressible elastic component; and the first bearing and the second bearing are an angular contact ball bearings respectively. With the adoption of the bearing constant-pressure pretightening device provided by the invention, the free end of an outer ring of the second bearing abuts against the compressible preloading component; the preloading component enables the first bearing and the second bearing to be always kept without load direction change during the process of loading work loads F; therefore, the phenomena of light load slip or severe abrasion and the like frequently occurring to the bearings during the process of unloading the loads with direction change are prevented; in addition, the preloading component can adjust the compression amount of an elastic gasket conveniently and fast through the arrangement of adjusting washergaskets of different numbers, so that the required bearing pretightening is obtained; and the free end of the second bearing is adjustable along the axial direction, so that the affection of temperature on the bearing preload can be automatically eliminated.

The invention discloses a grinding-area-adjustable stone grinding machine for bridge construction. The grinding-area-adjustable stone grinding machine comprises a rack and a grinding unit, the grinding unit includes a grinding assembly and a lifting mechanism for driving the grinding assembly to ascend and descend, the grinding assembly includes a grinding rotation shaft, a first motor used for driving the grinding rotation shaft to rotate, and a grinding body fixedly mounted at the bottom end of the grinding rotation shaft, the grinding body comprises a millstone, an adjusting block, a connecting rod, a worm gear ring, and a worm, the lifting mechanism comprises an electric push rod, a first mounting plate, a second mounting plate, and a compression spring, and further includes a dust reduction unit and a cleaning unit. According to the grinding-area-adjustable stone grinding machine for bridge construction, the grinding assembly is arranged, the grinding diameter during grinding canbe adjusted to achieve the effect of adjusting the grinding area according to demand; the lifting mechanism is arranged and can protect the grinding body, and meanwhile the compression amount of the compression spring can be adjusted to achieve the purpose of adjusting the grinding amount; the dust reduction unit and the cleaning unit are arranged to avoid affecting the environment and the healthof workers, and debris is avoided from affecting the grinding quality and even damaging the grinding body.

A double-eccentric ultralow temperature butterfly valve comprises a valve body, a valve rod and a butterfly plate. The double-eccentric ultralow temperature butterfly valve is characterized in that a manhole is formed in the valve body, and an upper maintenance cover is arranged at the position of the manhole; a sealing component composed of a sealing ring, a pressing ring and a jacking and pressing component is included; the inner side face of the sealing ring is sealed with the butterfly plate, the jacking and pressing component comprises a locking ring, a plurality of jacking and pressing screws arranged on the locking ring and locking nuts connected with the jacking and pressing screws, the end portions of the jacking and pressing screws are pressed on the outer end face of the pressing ring, a circular bead face is arranged at the end, away from the pressing ring, of the locking ring, and a compression ring compressed on the circular bead face is inserted in the inner cavity wall of the valve body. Through the structure, the sealing ring is convenient to replace online, and the online maintenance of the valve body is more convenient and faster. In the maintenance process, only the upper maintenance cover needs to be opened, and the sealing component is dismounted one by one. In addition, the position of the pressing ring is controlled by adjusting the jacking and pressing screws, the compression amount of the sealing ring can be adjusted, and therefore the sealing performance of the valve is guaranteed, and the safe reliability of the valve is improved.

The invention discloses a character enclosing machine, which belongs to the technical field of three-dimensional luminous character processing equipment, and includes a frame, a plate clamping device is provided on the frame, a cutting device is provided below the plate clamping device, and the The cutting device includes a mounting seat, on which a turntable is installed for rotation, on which a knife rod is slidably installed, on which a knife disc is provided, and between the turntable and the knife bar, there is a A moving linear drive device, the frame is provided with a stop block for limiting the rotation position of the knife rod, and the end of the knife rod close to the cutter head is equipped with a stop corresponding to the position of the stop block limit block. In the enclosing machine provided by the embodiment of the present invention, once the electrical control fails, the limit block on the cutter bar will touch the stopper block, preventing the cutter bar from continuing to rotate, effectively preventing the cutter bar from rotating in place, and making the high-speed rotating cutter head Knife collapse occurs; through mechanical limit, the safety performance of the letter enclosing machine is improved.