51results about How to "Reduce hard friction" patented technology

The invention belongs to the field of lubricants, and in particular relates to a gear oil additive, a gear lubricating oil and a preparation method and application thereof. The gear oil additive includes the following components in parts by mass: 1-3 parts of nano-scale copper powder, 2-5 parts of nano-scale silicon dioxide, 3-6 parts of nano-scale alumina, 2-3 parts of nano-scale graphite 5 parts, 1 to 4 parts of micron lead oxide and 3 to 6 parts of micron molybdenum disulfide. The present invention also provides a gear lubricating oil containing the above-mentioned gear oil additive. The gear lubricating oil can not only reduce the starting wear of the friction pair and the hard friction under the boundary lubrication state, but also reduce the pits or protrusions on the gear meshing surface. Mechanical micro-repair and polishing can increase the hardness of the gear tooth surface by about 15%, reduce the roughness Ra of the meshing surface by 5-10%, and reduce the vibration noise by 6-11%.

The invention relates to a semi-sealed device of a four-ram blowout preventer of a coiled tubing and a method. According to the technical scheme, an expandable semi-sealed rubber cylinder is installedat the center of a blowout preventer body, the self-locking end of the tail portion is fixed to the blowout preventer body through a rubber opening pressing ring, and a circular annular cavity is formed; and a semi-sealed expansion control block is fixed to the outer side of the blowout preventer body, an oil inlet buffer groove and an oil outlet buffer groove are formed in the inner side of theblowout preventer body, and the oil inlet buffer groove corresponds to the expandable semi-sealed rubber cylinder of the blowout preventer body. The semi-sealed device of the four-ram blowout preventer of the coiled tubing and the method have the beneficial effects that the expandable semi-sealed rubber cylinder is of an integral structure, the expandable semi-sealed rubber cylinder is fixed in aspecial-shaped cavity of the blowout preventer body through the rubber opening pressing ring, during use, the expandable semi-sealed rubber cylinder can be self-locked on the blowout preventer body bypressing, the other side expands to seal the outer wall of the coiled tubing in a contacted mode, mutual balance of the pressure of internal and external of gas or liquid is achieved, leakage is notprone to occurring, using is more reliable, and the service life of the expandable semi-sealed rubber cylinder is prolonged.

The invention discloses a quick cleaning device for a nozzle of a 3D printer, which includes a chassis. The top of the chassis is vertically fixedly connected with a threaded connection ring, the center of the top of the chassis is provided with a circular card slot downward, and one side of the chassis is vertically provided with a water inlet, and the bottom of the water inlet is connected through a connecting pipe. It communicates with the interior of the circular card slot, the top of the chassis is provided with a fixed cylinder, and the top of the fixed cylinder is symmetrically provided with two clamping devices, and the top of the circular card slot is vertically provided with a vertical A straight rod, the center of the vertical rod is vertically provided with a water outlet pipe, and the side wall of the end of the vertical rod far away from the circular slot is surrounded by a brush. The invention has the advantages of convenient operation and use, can quickly clean up impurities on the inner wall, and will not scratch the inner wall of the nozzle.

The invention discloses a solar power generation panel cleaning device and a cleaning method thereof, comprising: a cleaning component and an air blowing device connected together through an installation housing, a matching hole is provided on the circumferential side of the installation housing, the matching hole is connected with an assembly frame, and the installation The lower part of the housing is provided with a circumferential baffle and an upper baffle, the front of the circumferential baffle is provided with an opening, and the inner side of the circumferential baffle is provided with a helical blade. The dust box is set on the inner side of the circumferential baffle; the front of the upper baffle is provided with an air blowing device, and the front end of the air blowing device is provided with an air blowing port. The bristles are arranged, the seepage pipes are arranged between the bristles, and the seepage pipes are installed on the outer side of the circumferential baffle through the connecting piece. Clean the solar power generation panel by rotating the bristles to avoid scratches on the surface of the solar power generation panel, so that the solar power generation panel always maintains a high light transmittance.

The present invention provides a load hanging device for mechanical lifting hanging tower, which involves the field of load patching technology, including: hook body, cardboard, protective cover, balance cover and traction parts;There are two sets of relative side supports at the end, one end of the pull rope is connected to the bottom bottom of the tongue, and the other end is connected to the bottom of the side of the side support.There are top links, the top rod is interspersed in the middle of the protective cover, and through the two sets of cardboard cards, the balance sheet is packed at the middle of the top link through the key axis holes.There is a penetration cavity, and the top link is penetrated into the plug -in cavity through the inner jack.It can eliminate the rotation power when the heavy object is lifted. When the heavy object is landing, the tongue block is automatically separated from the opening end of the hook body, which solves the hard friction of the bottom end of the sling and the hook body when the heavy object is lifted, and the bottom end of the hook body.The hook body sometimes rotates with the heavy objects, which affects the safety of hanging safety.

The invention discloses a moving element clearance adjustment structure which comprises a first element, a second element and an adjusting ring which is provided with a radial through hole; the first element is provided with a housing which comprises a first surface, a second surface and a mounting hole which passes through the first surface and the second surface; the second element is inserted into the mounting hole and can axially move in relation to the first element; the adjusting ring is arranged in the mounting hole and positioned on a limit surface of the housing for avoiding the adjusting ring from axially falling off the mounting hole; the through hole of the adjusting ring is sheathed on the second element; the adjusting ring keeps radial clearances with the mounting hole, the through hole and the second element. When the roundness of the second element is not high, the second element generates slight friction with the adjusting ring to cause the adjusting ring to perform slight radial movement, which causes the clearance between the second element and the adjusting ring to become uniform and removes the friction, thus greatly reducing the verticality and roundness requirements of the second element and a support and lifting structure for driving the second element to axially go up and down and causing the assembly production to be easier and simpler.