31results about How to "Small drainage resistance" patented technology

The invention discloses a ship turbine jet-propulsion technology, which is a speed upgrading and updating technology. A turbine propulsion device is adopted, and consists of a turbine shaft and turbine wheels, which are combined, wherein the turbine wheels are spirally arranged on the turbine shaft; each turbine wheel is shaped into a parabola, the middle part of each turbine wheel is raised and widened, and the two ends of each turbine wheel is narrowed to the turbine shaft. The technology has the advantages that the water displacement is maximized, and the drainage resistance is minimized; a two-wheel form and a three-wheel form are adopted as conventional forms; a blade angle, a pitch and a blade movement radius of a propeller are replaced by a turbine angle, a vortex spacing and a turbine movement radius, through which pressure can be quickly relieved, so that the fluid mechanical problems of water body pressure relief and wave-making resistance during the propulsion of a ship are solved, and the ship speed improvement space is at least doubled; a columnar jet drainage form is adopted; the wave-making resistance produced by an excessively large hub and excessively long blades of the propeller is changed, and a propulsion load is correspondingly improved; the resistance is eliminated and reduced, and the efficiency is improved, so that energy resources are saved; a long propeller is abandoned, so that damage to aquatic organisms can be avoided, and the technology is an ecological protection technology.

The invention relates to an on-line back flushing device of a panel-type heat exchanger and a flushing method thereof. The device has a reasonable structure, is flexible to operate and has less investment, and comprises a panel-type heat exchanger; the panel-type heat exchanger is connected with a cooling water inlet pipeline and a cooling water return pipeline; the cooling water inlet pipeline is provided with a cooling water inlet operating valve, and is also provided with a back flush drain pipeline; the back flush drain pipeline is provided with a back flush operating valve; the cooling water return pipeline and the cooling water inlet pipeline are also respectively provided with at least one pressure gauge and at least one pressure transmitter.

The invention relates to a small-sized and multipurpose high-pressure pump. The small-sized and multipurpose high-pressure pump is composed of a power end and a hydraulic end, wherein the power end comprises a crank case, a back cover, a crankshaft, a crankshaft end cover, a plurality of connecting rods and an integrated intermediate rod; the hydraulic end comprises a pump head, a plurality of intake valves and a plurality of drain valves. The small-sized and multipurpose high-pressure pump has the following advantages: because the original crosshead and plunger rod are replaced by the integrated intermediate rod, the coaxiality is good, assembly is convenient, and meanwhile, the size of the product can be reduced; the crank case and the back cover are provided with fins, the crankshaft end cover is provided with heat-dissipating holes, meanwhile, the part of the crank case, which corresponds to the heat-dissipating holes, is provided with slots, moreover, the middle of the bottom of the crank case is sunken upwardly, consequently, the coercive measures can ensure that the heat in the crank case can be dissipated out as soon as possible, so that the lubricating property of the lubricating oil in the crank case cannot be affected, as a result, the parts in the crank case can be prevented from being abraded, and thereby the service life of the entire product can be prolonged. The arrangement of the fins also can play a reinforcing role at the same time.

The invention relates to a drainer based on a rotating drainage core structure, comprising a drainer body, a drainage core, an annular lower plate and a rubber soft cover, the drainer body is a cylindrical structure with a hollow inner cavity, a drainage core and an annular lower plate It is arranged in the inner cavity of the drain body from top to bottom, and the rubber soft cover is plugged in the upper mouth of the drain to stop the water. Compared with the prior art, the present invention is a new type of drainer with a detachable and rotating drainage core structure with a filtering function, which realizes the intelligent drainage function without a power device, and has the advantages of not easily generating vibration, long service life, large filtering area, and high flow rate. Small resistance and other advantages.

The invention discloses a sludge dehydrator, which comprises a frame and a supporting plate connected with the frame; a sludge pumping mechanism and a pressure extrusion mechanism are arranged at two sides of the supporting plate respectively; a frame plate type filter pressing mechanism is arranged between the pressure extrusion mechanism and the connected supporting plate; the filter pressing mechanism comprises a filter pressing unit; a filter plate is arranged in the filter pressing unit; an annular sleeve is sleeved on the peripheral wall of the filter plate; a filter pressing cavity is formed between the filter plate and a front pressing plate; filter cloth is arranged on the surface of the filter plate in the filter pressing cavity; the surface of the filter plate is provided with a filtrate drainage hole; the drainage hole is connected with a drainage passage arranged in the filter plate and extended to the exterior; and the filter plate is interconnected with the surface of arear pressing plate to form a whole, and the middle part of the filter plate is provided with a through hole which is communicated with a pipeline of the sludge pumping mechanism. The sludge dehydrator can improve the filter pressing efficiency and is convenient to control the dryness of mud cakes.

The invention discloses a diffusion device for discharging waste water from a ship tail gas desulfurization system. The diffusion device comprises a cylindrical body, wherein a plane, a concave surface, a central diffusion hole and a plurality of peripheral diffusion holes are formed in the cylindrical body. The central diffusion hole and a plurality of the peripheral diffusion holes are formed inthe cylindrical body, and a certain hole elevation angle is arranged between the central line of the peripheral diffusion holes and the axis of the cylindrical body, so that waste water diffused by the peripheral diffusion holes rapidly diffuses to the peripheral direction, the mutual concentration superposition of waste water diffusion is less; waste water discharged by a plurality of the peripheral holes diffuses out along the respective peripheral directions, and thus drainage obstruction interference between the peripheral diffusion holes can be reduced, and the drainage resistance can bewell reduced, so that the diffusion device can achieve the purpose of effectively diffusing waste water under lower resistance and meet the requirements of IMO MPEC.

The present invention relates to a pneumatic tire which evenly increases draining performance and anti-wear performance. On the tire tread (2) is provided with: a central main channel (3A), an intermediate principal sulcus (3B), a tire shoulder main channel (3C), a central groove crossing channel (4A), an intermediate transverse groove (4B) and a tire shoulder transverse groove (4C). The intermediate transverse groove (4B) and the tire shoulder transverse groove (4C) are approximately in linear extension and their channel widths range between 4 -16.0mm. At the bottoms of the intermediate transverse groove (4B) and the tire shoulder transverse groove (4C) are provided reinforced steel the depth of which is no less than 50% (T). After the central block (5), the central region of the ends of the (5A) land ratio after the middle block (6) at both ends of the middle region (6A) of the land is 1.05 -1.25 times. The central groove crossing channel (4A) with respect to the tire axial angle has an angle 15 -45 degrees which is larger than that of the middle transverse groove (4B) with respect to the tire axial angle.