[0033] In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the embodiments and drawings will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments, which are common in the art. As far as technical personnel are concerned, other drawings can be obtained without creative labor.
[0034] Such as figure 1 As shown, a long-life energy-saving single-stage centrifugal pump includes a pump body (1), a pump suction chamber (2), a pump press-out chamber (3), and a pump cover (4), which are located at the lower part of the pump body (1) It is the suction chamber (2) of the pump, the upper part is the press-out chamber (3) of the pump, the pump cover (4), the impeller (5), the pump cover (4) covers the upper part of the pump press-out chamber (3), and the impeller ( 5) Rotate at a high speed in the pumping chamber (3) to make the liquid in the impeller (5) form centrifugal force, which is converted into pressure in the pumping chamber (3). The liquid is continuously pressed out from the outlet (6) of the press-out chamber, so the suction port of the impeller (5) forms negative pressure and continuously sucks the liquid from the suction chamber (2) of the pump, and continuously from the inlet (7) of the pump suction chamber Replenish the liquid to complete the delivery of water or liquid. There is a water mold bearing (8) at the bottom of the pump cover (4). The pressure water of the water mold bearing (8) comes from the pump's press-out chamber (3), filtered by the ring filter (9), and then passed through the delivery pipe (10) , Enter the water mold bearing (8), pass 4 to 12 orifices (11), and distribute to the static pressure cavity of the water mold bearing (8) to form a rigid hydrostatic water film on the pump shaft (16). The lubrication method changes the sliding friction of the conventional sliding bearing into a rigid hydrostatic water film slip, and separates the high-speed rotating pump shaft and the water film bearing with a 0.03 to 0.05mm hydrostatic water film to make the pump shaft and the water film separate The bearing does not produce friction and becomes a water film bearing that does not wear. Since the pressure water of the water model bearing comes from the pump's press-out chamber, the supply of pressurized water during the pump operation will not be interrupted and the formation of a static water film will not be maintained. Discontinuous, so the continuity and effectiveness of the water model bearing in the working process are guaranteed.
[0035] Energy-saving measures 1: The water model bearing is a frictionless bearing-reducing energy consumption without friction-it is an energy-saving bearing.
[0036] On the pump cover (4), an annular filter screen (9) is arranged in the inner cavity of the pump press-out chamber (3). This ring-shaped filter screen (9) obtains the pressure of the natural rotation in the pump press-out chamber (3) The water is scoured without being blocked, so the filtration accuracy can reach 10~15μm, and the diameter of human hair is about 60~80μm. Therefore, it is ensured that the fine sand cannot enter the water model bearing and the safe operation of the water model bearing. . And the connecting conveying pipe (10) is directly casted inside the pump cover (4), so that the structure design can be realized.
[0037] In the lower part of the water model bearing (8) is a negative pressure cavity (12), which ensures smooth drainage of the water model bearing due to the action of negative pressure, thereby ensuring the self-adjusting ability of the water model bearing.
[0038] The negative pressure chamber (12) is connected with the suction port of the impeller (5) through the balanced suction hole (13) to form negative pressure.
[0039] Energy-saving measures 2: Due to the high positioning accuracy of the water model bearing, and no cantilever,
[0040] The sealing gap between the impeller and the sealing ring is smaller than that of conventional pumps, and the reduction of the sealing gap is equivalent to reducing the internal leakage of the pump, so the volumetric efficiency of the pump is improved-effective energy saving 1~1.5%.
[0041] Energy-saving measure 3: The upper part of the water film bearing (8) is the stuffing box (14) and the packing gland (15). The packing gland (15) is used to adjust the packing force to achieve the seal between the pump shaft (16) and the outside world. Performance can be adjusted. Because the flow of pressure water is limited by the set value when the pressure water flows through the orifice, and the lower part of the water model bearing is negative pressure, the leakage pressure between the pump shaft and the outside is lower than that of the conventional pump, so the packing force can be less than the conventional The pump has less leakage, reducing the holding force is equal to reducing the friction of the packing on the pump shaft, and further energy saving.
[0042] Energy-saving measure 4: Deep groove ball bearings (23) are used on the pump shaft (16). Since the upper and lower sides of the impeller (5) are negative pressure chambers (12), the axial force generated by the impeller's water delivery is basically balanced, and the axial force borne by the ball bearing ≈ the weight of the pump shaft and the impeller. In the same way, the pump shaft basically has no cantilever, and the radial force on the pump shaft is basically concentrated in the hydrostatic bearing part, so the axial force and radial force assumed by the deep groove ball bearing are slight. Therefore, it is ensured that the bearing is durable and has low friction and saves energy.
[0043] There is a motor seat (17) on the upper part of the pump body (1), a pump cover (4) is fixed between the pump body (1) and the motor seat (17), and the end faces of the pump body (1) and the pump cover (4) are sealed Glue (18) to ensure the sealing of the press-out chamber.
[0044] The upper part of the motor seat (17) is equipped with a motor, the middle part is provided with the upper bearing of the pump shaft, and the lower part is the pump cover and the pump body. The three supporting points are formed inside an object, that is, the inside of the motor seat is formed, ensuring three supports The coaxiality of the points ensures the stability of pump operation and low noise, low vibration, and low heat generation.
[0045] There is an impeller nut (19) at the lower end of the pump shaft (16) for fastening the impeller (5). The impeller is connected in sequence: water mold shaft sleeve (20), packing shaft sleeve (21), bearing stop sleeve (22), deep groove ball bearing (23), bearing nut (24), coupling sleeve (25). All shafts are protected by various sleeves so they are durable.
[0046] The lower bearing cover (26) and the upper bearing cover (27) are equipped with sealing devices to ensure that the bearing runs without dust and is durable.
[0047] The above is an embodiment of a vertical long-life pump, which is an independent liquid conveying device, and its structure and principle can also be applied to a horizontal long-life pump, and it can work with any power equipment.
[0048] The longevity pump has a flow range of 3-720M3/h, a head range of 8-120M, and a power range of 0.37-200Kw.
[0049] Based on the above-mentioned exquisite design, all aspects have been achieved to the extreme. It is estimated that the maintenance-free operation time of the long-life energy-saving single-stage centrifugal pump can exceed three to five years.
[0050] Combining the above-mentioned exquisite design, all aspects of energy-saving solutions have achieved the ultimate. It is estimated that the long-life pump can increase the efficiency by 2-3% compared with the conventional pump.
[0051] The utilization rate of single-stage centrifugal pumps in centrifugal pumps exceeds 80%, while the average efficiency of conventional pumps after friction and wear will drop by 5-12%. As long as they can still run, general users will not replace pumps. This is a common phenomenon. This intangible waste causes a waste of more than 31 billion Kw/h of electricity for our country every year. In 2012, my country's total electricity consumption was 4,959.1 billion Kw/h, of which various pumps accounted for 25% of my country's total electricity consumption. The estimated pump electricity consumption was 1239.8 billion Kw/h. If the pump efficiency is increased by 2.5~6.5%, my country can save 31~80.6 billion Kw/h of electricity every year. Estimation based on 1 ton of coal power generation = 3333 kilowatt-hours of electricity: my country can save 930 to 248 million tons of coal for power generation each year, which is a huge contribution to the protection of our environment and investment.
