36results about How to "Reduce water erosion" patented technology

The invention discloses a last stage vane of a steam turbine and a preparation method thereof. The last stage vane of the steam turbine comprises a last stage vane substrate which is subjected to thermal refining; the last stage vane substrate is bonded with a chrome-based ceramic coating which consists of a bonding layer, a water-erosion resistance layer and a waterproof layer. The last stage vane has reasonably designed coating structure; and the prepared chrome-based ceramic composite coating has excellent bonding force, high hardness (30GPa) and excellent water-erosion resistance and better water-erosion resistance performance than that of the non-coated vane, greatly prolongs the service life of the last stage vane and generates no pollutions during the preparation process.

The invention discloses a method for constructing a composite river bottom protection with steel sheet piles and soft mattresses for an artificial island, which comprises the following steps: (1) driving down the steel sheet piles in turn outside the bottom of a breakwater body of the artificial island to be constructed, and transversely connecting the steel sheet piles into a steel plate wall under the benthic mud surface through lateral surface lock catches; and (2) paving interlocking block woven and needled composite geotextile soft mattresses at the water bottom 38 to 42 meters away fromthe steel sheet piles, paving woven and needled composite geotextile sand-rib soft mattresses between the steel sheet piles and the island breakwater bottom of the artificial island, and paving knitted and needled composite geotextile sand-rib soft mattresses under the breakwater body of the artificial island to be constructed. The method changes the prior method for constructing a single soft mattress river bottom protection, and the steel sheet piles are immersed under the outer side mud surface of the base of slop of the breakwater body of the artificial island and are transversely interlocked into an integral steel plate wall to form a three-dimensional protection. The method effectively reduces the erosions to the seabed by water flow and ensures the structural safety of the breakwater body of the artificial island.

The invention discloses a water erosion defect monitoring and recognition method of a turbine blade. The method comprises the steps of sampling, modeling, and warehousing and actual operation analysis. At the step of sampling, modeling, and warehousing, experimental measurement, numerical simulation and data training are performed successively. An accelerated water erosion experiment consistent with an actual operation condition is carried out on a material to obtain a function relational expression of influences of an impact angle, an impact speed and the like on a water erosion defect feature size; on the basis of the relational expression, a blade vibration model with water erosion defects is established and a water erosion defect combination X-vibration signal oscillogram Y database isestablished; and a data set is integrated and divided, neural network training is performed, and a water erosion defect evaluation mechanism is established. At the step of actual operation analysis,a blade vibration signal oscillogram needs to be collected on site, an analysis library is compared, the set operation safety is evaluated, and a corresponding operation and maintenance scheme is formulated. According to the invention, the abnormal vibration of the blade in actual operation can be monitored in real time; the data support can be provided for the set fault diagnosis; the safe operation of the set can be guaranteed; and huge economic losses caused by blade accidents are reduced.

Provided is a converter waste heat steam comprehensive utilization system. A steam-water separator is additionally arranged at the position, before entering a steam turbine, of one side of a steam pipeline, one way of superheated steam is led in from a steam main pipe of a factory and fed into the position, located in front of the steam-water separator, of the steam pipeline, the led-in superheated steam and saturated steam generated by a heat accumulator are mixed before entering the steam-water separator, it is guaranteed that the superheat degree of the steam is above 5 degrees, and the steam is conveyed backwards; the heat accumulator is additionally arranged in the part, before the position where the superheated steam is led in, of the steam pipeline. Meanwhile, the invention discloses a converter waste heat steam comprehensive utilization method. When the converter waste heat steam comprehensive utilization system runs normally, the steam dose not need to pass through the steam-water separator, resistance can be reduced, the enthalpy value reduction amount of the steam obtained after the steam passes through the steam-water separator can be reduced, the overall efficiency of a steam-turbine generator can be improved, water erosion of a last stage blade of the steam turbine can be greatly reduced, and safe and efficient operation of the steam turbine can be guaranteed. Meanwhile, the influence on operation safety of the steam turbine of the superheated steam at 5 superheat degrees is avoided, and steam parameters are increased.

The invention discloses a high-seal centrifugal sand pump for reducing water erosion, which comprises: a pump casing, a motor shaft, an outer magnetic rotor, an isolation sleeve, an inner magnetic rotor, a transmission shaft, an impeller, an end cover, a material inlet, a material outlet and a buffer. Flow mechanism, the center of the end cover is provided with a feed port, and the side of the end cover is provided with a discharge port; the feed port is provided with a slow flow mechanism, and the slow flow mechanism includes a slow flow shell, a slow flow groove, a slow flow block and a slow flow spring , the circulation casing is fixedly arranged on the feed inlet, and a slow flow groove is arranged in the slow flow casing, and a slow flow spring is fixedly arranged in the slow flow groove, and a slow flow stopper is arranged at one end of the slow flow spring; on the one hand, the inner wall of the equipment is adopted The buffer structure reduces the pressure of the fluid on the equipment, reduces the damage of the equipment, and has a long service life. On the other hand, it increases the pressure near the feeding pipe, solves the problem of cavitation, improves the working quality of the equipment, and the equipment is not easy to damage and has a practical life. high.

The invention discloses a steam-free passing water cooler. Two heads of a venture sleeved in an outer sleeve pipe are communicated with cooling water nozzles and the inner chamber of a main steam / water separation box, two ends of a center hole of a front steam / water separation box are respectively provided with a positive puffing split-jet injector and a transition catheter, two head of a front air / water delivery pipe are respectively communicated with the front steam / water separation box and the inner chamber of a steam condenser, a backwater balance box is sleeved with a nozzle box, and the plurality of cooling water nozzles are arranged on the nozzle box. The upper side wall of the main steam / water separation box is provided with the steam condenser, the cooling water nozzles are communicated with the inner chamber of the steam condenser, a main drainage pipeline is communicated with the lower side of the main steam / water separation box, a negative puffing water ring split-jet injector extends into the inner chamber of the main steam / water separation box, a negative puffing water pipe on a negative puffing water box is communicated with a cooling water inlet pipe, a back air / steam delivery pipe on a back steam / water separation box communicated with the negative puffing water box is communicated with the steam condenser, and a negative puffing split-jet injector is sleeved at the center of the back steam / water separation box. The condensed steam can be collected, and the service life of equipment can be prolonged.