Low-loss high-efficiency transmission centrifugal pump

Abstract

The application relates to a low-loss high-efficiency centrifugal pump, belonging to the technical field of mechanical engineering pumps. The centrifugal pump comprises an execution assembly and a pump shell, the execution assembly is installed in the pump shell, the execution assembly comprises a main shaft, a double-suction pump impeller is fixedly installed in the middle of the main shaft, an impeller groove is formed in the inner wall of the middle of the pump shell, the double-suction pump impeller is located in the impeller groove and rotationally connected with the inner wall of the impeller groove. The cooling fins in the circumferential array are matched with the cooling fan, the cooling lubricating oil stored in the large-capacity cavities in the left and right sealing shells can quickly absorb the heat generated by the friction of the oil seal mechanism, the circulating oil circuit continuously transports the high-temperature lubricating oil into the right sealing shell with the heat dissipation fins to perform forced air cooling, the stability of the lubricating oil viscosity is maintained throughout the process, the oil film continuously has high bearing capacity, the lubrication failure caused by high temperature is eliminated, and the friction heat loss is continuously reduced.

Description

Technical Field

[0001] This invention relates to the field of mechanical engineering pump technology, and in particular to a low-loss, high-efficiency centrifugal pump. Background Technology

[0002] Double-suction centrifugal pumps, with their advantages of large flow rate, stable operation, and theoretical axial force self-balancing, are widely used in continuous fluid transmission scenarios such as municipal water supply, water conservancy irrigation, chemical fluid transportation, and mine water supply and drainage. They are core general-purpose equipment in the field of fluid transportation. The industry has long pursued lower operating losses, higher transmission efficiency, and longer seal and bearing service life in order to reduce equipment energy consumption and operation and maintenance costs.

[0003] Traditional mechanical seals rely on springs to compress the stationary ring and the rotating ring of the shaft sleeve to form a sealing surface. When conveying fluids containing mud, sand, or solid impurities, the medium can easily intrude into the mating surface of the stationary and rotating rings along the gap between the main shaft and the sealing housing. Impurity particles continuously grind the sealing end face, causing scratches and deformation of the sealing surface. The sealing gap continues to widen, leading to medium leakage. At the same time, the lubrication and cooling system of traditional centrifugal pump shaft seals is poorly designed, making it difficult to achieve lubricating oil circulation filtration and uniform full-coverage lubrication. Friction losses remain high. Furthermore, when lubricating the pump components, the lubricating oil is prone to failure due to the continuous rise in temperature inside the sealing cavity, which reduces the viscosity of the lubricating oil, weakens the oil film carrying capacity, and significantly reduces the lubrication and cooling effect.

[0004] In summary, existing double-suction centrifugal pumps suffer from multiple defects, such as easy wear and tear of the mechanical seal due to media intrusion, difficulty in self-circulating filtration of the lubrication system, and insufficient heat dissipation capacity. There is an urgent need to design a low-loss, high-efficiency centrifugal pump. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a low-loss, high-efficiency centrifugal pump. By setting up a circumferential array of cooling fins in conjunction with a cooling fan, and utilizing the large-capacity cavities in the left and right housings to store cooling lubricating oil, the heat generated by friction in the oil seal mechanism can be quickly absorbed. The circulating oil circuit continuously delivers the high-temperature lubricating oil to the right housing with heat dissipation fins for forced air cooling, thereby maintaining the stability of the lubricating oil viscosity throughout the process, ensuring that the oil film has a high load-bearing capacity, preventing lubrication failure caused by high temperature, and continuously reducing frictional heat loss.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A low-loss, high-efficiency centrifugal pump includes an actuator and a pump casing. The actuator is installed inside the pump casing and includes a main shaft. A double-suction pump impeller is fixedly installed in the middle of the main shaft. An impeller groove is formed on the inner wall of the middle part of the pump casing. The double-suction pump impeller is located in the impeller groove and is rotatably connected to the inner wall of the impeller groove. Suction grooves are formed on both sides of the middle part of the pump casing and are connected to the inside of the impeller groove. A suction port is formed at the front end of the pump casing and is connected to the two sets of suction grooves. A drain port is formed at the end of the pump casing and is connected to the impeller groove.

[0007] Optionally, oil seal mechanisms are installed at both ends of the main shaft, and the oil seal mechanisms are connected to the outer wall of the corresponding water suction tank. The two sets of oil seal mechanisms are arranged symmetrically. T-shaped moving rings are fixedly installed at both ends of the main shaft, and the T-shaped moving rings are located inside the corresponding oil seal mechanisms. The outer wall of the T-shaped moving rings is provided with spiral grooves.

[0008] Optionally, the oil seal mechanism includes an inner cylinder shell, which is fixedly connected to the outer wall of the water suction tank by bolts. An outer cylinder shell is fixedly installed on the end wall of the inner cylinder shell by bolts. Positioning sleeves are fixedly installed on the inner walls of both the outer cylinder shell and the inner cylinder shell. A fitting groove is opened on the inner wall of the positioning sleeve. A spring column is fixedly installed in the fitting groove. Multiple sets of spring columns are arranged in a circumferential array. The end walls of the multiple sets of spring columns are fixedly installed with the same pressure sleeve. A stationary ring is fixedly installed on the end wall of the pressure sleeve, and the end wall of the stationary ring contacts the end wall of the T-shaped moving ring. The inner wall of the end of the outer cylinder shell is rotatably connected to the main shaft through multiple sets of sealing rings and bearings.

[0009] Optionally, an annular sealing shell is fixedly installed on the inner wall of the front end of the inner cylinder shell. An elastic sealing membrane is sealed and fixedly connected to the inner wall of the annular sealing shell, and the elastic sealing membrane is in movable contact with the outer wall of the T-shaped moving ring. Two sets of air inlet pipes are fixedly installed on the outer wall of the front end of the inner cylinder shell, and the air inlet pipes are connected to the inside of the annular sealing shell.

[0010] Optionally, an oil inlet pipe is fixedly installed on the inner wall of the outer cylinder shell, and an annular oil guide groove is opened on the inner wall of the outer cylinder shell, and the annular oil guide groove is connected to the oil inlet pipe. Multiple sets of oil outlet holes are evenly opened on the inner wall of the annular oil guide groove. Oil outlet pipes are fixedly installed on the outer walls at both ends of the inner cylinder shell, and the lubricating oil guided by the annular oil guide groove can be discharged through the oil outlet pipe.

[0011] Optionally, a left sealing shell is fixedly installed on the outer wall of the outer cylinder shell on the left side by bolts, and a right sealing shell is fixedly installed on the outer wall of the outer cylinder shell on the right side by bolts. Both the left and right sealing shells are filled with cooling lubricating oil, and both the left and right sealing shells are sealed and connected to the corresponding two sets of oil outlet pipes.

[0012] Optionally, a transfer cylinder is fixedly installed on the outer wall of the middle part of the left casing, the main shaft rotates through the inner wall of the transfer cylinder via a bearing, a packing seal is fixedly installed at the connection between the main shaft and the transfer cylinder, and a negative pressure blade is fixedly installed on the end wall of the main shaft located inside the transfer cylinder.

[0013] Optionally, the main shaft rotates through the right cover via a bearing, and a packing seal ring is fixedly installed at the connection between the main shaft and the right cover. A cooling fan is fixedly installed on the right end wall of the main shaft, and multiple sets of cooling fins arranged in a circumferential array are fixedly installed on the outer wall of the right cover. A protective cover is fixedly installed on the outer wall of the right cover by bolts, and the protective cover provides protection for the cooling fan and the cooling fins.

[0014] Optionally, an oil guide pipe is fixedly installed on the outer wall of the transfer cylinder, and the oil guide pipe is connected to the inside of the transfer cylinder; an oil inlet pipe is fixedly installed on the inner wall of the left sealing shell, and the oil inlet pipe is sealed and connected to the inside of the transfer cylinder; a filter is fixedly installed on the outer wall of the pump casing, and the other end of the oil guide pipe is connected to the input end of the filter.

[0015] Optionally, the filter output end is fixedly installed with an oil drain manifold, both sets of oil inlet pipes are sealed and connected to the inside of the oil drain manifold, and a connecting pipe is fixedly installed on the inner wall of the right sealing shell, with the other end of the connecting pipe sealed and connected to the inside of the left sealing shell.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: In the above solution, by setting an annular sealing shell and an elastic sealing membrane at the front end of the oil seal mechanism, when high-pressure gas is introduced into the air inlet pipe, the elastic sealing membrane expands and adheres to the outer wall of the T-shaped moving ring, forming the first pre-barrier. This can prevent the conveying medium containing mud, sand, and solid impurities from entering the seal in advance. At the same time, the rear end uses a circumferential array of spring columns to continuously press the stationary ring, so that the stationary ring and the end face of the T-shaped moving ring are tightly fitted to form an active seal. This avoids solid impurities from continuously grinding the sealing end faces of the moving and stationary rings, and eliminates media leakage caused by scratches on the sealing surface and widening of the gap. This significantly extends the service life of the mechanical seal and reduces the frequency of seal replacement and downtime maintenance costs.

[0017] By setting up an oil seal mechanism and oil circuit design, the negative pressure blades inside the central rotating cylinder are driven to generate negative pressure when the main shaft is running, which autonomously draws the cooling lubricating oil from the left seal shell. The entire oil circuit can achieve continuous circulation without an additional oil supply pump. At the same time, the lubricating oil enters the external filter through the oil guide pipe, filters out wear impurities in the oil, and is then transported to the annular oil guide grooves of the oil seal mechanism on both sides through the oil drain manifold. Then, through multiple evenly distributed oil outlet holes, it fully covers all friction components such as the T-shaped moving ring, stationary ring, spring column, bearing, and positioning sleeve, forming a complete and continuous lubricating oil film. This significantly reduces the frictional loss of each moving part and prevents impurities from repeatedly wearing the seal and bearing components with the lubricating oil.

[0018] By combining a circumferential array of cooling fins with a cooling fan, and utilizing the large-capacity cavities of the left and right housings to store cooling lubricating oil, the heat generated by friction in the oil seal mechanism can be quickly absorbed. Furthermore, the circulating oil circuit continuously delivers the high-temperature lubricating oil to the right housing with heat dissipation fins for forced air cooling, thus maintaining the stability of the lubricating oil viscosity throughout the process. This ensures that the oil film maintains a high load-bearing capacity, prevents lubrication failure caused by high temperatures, and continuously reduces frictional heat loss. Attached Figure Description

[0019] Figure 1 A three-dimensional structural diagram of a low-loss, high-efficiency centrifugal pump. Figure 2 This is a schematic diagram of the assembly of the actuators within the pump casing; Figure 3 This is a diagram illustrating the installation of the execution components; Figure 4 This is a schematic diagram of the pump casing. Figure 5 This is a schematic diagram of the assembly of the protective cover and the right seal. Figure 6 This is a schematic diagram of the structure of the execution component; Figure 7 This is a schematic diagram of the assembly of the cooling fins and the right-side casing; Figure 8 This is a schematic diagram of the assembly of the oil seal mechanism and the main shaft; Figure 9 This is the oil circuit connection diagram for the centrifugal pump; Figure 10 for Figure 9 Enlarged view of point A in the middle; Figure 11 for Figure 9 Enlarged view of point B in the middle; Figure 12 This is a schematic diagram of the assembly of the left sealing shell and the outer shell; Figure 13 This is a cross-sectional view of the oil seal mechanism; Figure 14 This is a schematic diagram showing the disassembled oil seal mechanism; Figure 15 This is a schematic diagram of the assembly of the positioning sleeve and the outer shell; Figure 16 This is a schematic diagram of the assembly of the annular sealing shell and the inner cylinder shell; Figure 17 This is a schematic diagram of the assembly of the inner shell and the T-shaped rotating ring; Figure 18 This is a flow diagram of cooling lubricating oil within the oil seal mechanism.

[0020] Figure label: 100. Actuating component; 110. Main shaft; 111. Double suction pump impeller; 112. T-shaped moving ring; 113. Spiral groove; 120. Oil seal mechanism; 121. Inner shell; 122. Air inlet pipe; 123. Annular sealing shell; 124. Elastic air seal diaphragm; 125. Outer shell; 126. Oil inlet pipe; 127. Annular oil guide groove; 128. Oil outlet hole; 129. Oil outlet pipe; 130. Positioning sleeve; 131. Fitting groove; 132. Spring column; 133. Pressure sleeve; 13 4. Stationary ring; 140. Left seal; 141. Central rotary drum; 142. Negative pressure vane; 143. Packing seal ring one; 150. Right seal; 151. Packing seal ring two; 152. Cooling fan; 153. Cooling fins; 154. Protective cover; 160. Oil guide pipe; 161. Filter; 162. Main oil drain pipe; 163. Oil inlet pipe; 164. Connecting pipe; 200. Pump casing; 210. Impeller groove; 220. Water suction groove; 230. Water suction port; 240. Drain port. Detailed Implementation

[0021] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0022] like Figures 1 to 18 As shown, an embodiment of the present invention provides a low-loss, high-efficiency centrifugal pump, including an actuator 100 and a pump casing 200. The actuator 100 is installed inside the pump casing 200 and includes a main shaft 110. A double-suction pump impeller 111 is fixedly installed in the middle of the main shaft 110. An impeller groove 210 is formed on the inner wall of the middle part of the pump casing 200. The double-suction pump impeller 111 is located in the impeller groove 210 and is rotatably connected to the inner wall of the impeller groove 210. Suction grooves 220 are formed on both sides of the middle part of the pump casing 200, and the suction grooves 220 are connected to the inside of the impeller groove 210. The two sets of suction grooves 220 are symmetrically arranged about the impeller groove 210, so that the axial force on the double-suction pump impeller 111 can cancel each other out. The front end of the pump casing 200... The centrifugal pump is equipped with a suction port 230, which is connected to two sets of suction channels 220. The pumping end of the centrifugal pump is provided by the two sets of suction channels 220. The pump casing 200 has a drain port 240 at its end, which is connected to the impeller groove 210. In this invention, when the centrifugal pump is working, the main shaft 110 drives the double-suction pump impeller 111 to rotate. Under the action of centrifugal force, the suction channels 220 at both ends of the double-suction pump impeller 111 can draw external liquid through the suction port 230. Under the drive of the double-suction pump impeller 111, the liquid is pressurized and discharged through the drain port 240. At this time, the axial forces at both ends of the double-suction pump impeller 111 are the same in magnitude and opposite in direction, thus canceling each other out and effectively reducing the loss of the centrifugal pump.

[0023] like Figures 3 to 9 As shown, oil seal mechanisms 120 are installed at both ends of the main shaft 110, and the oil seal mechanisms 120 are connected to the outer wall of the corresponding water suction tank 220. The two sets of oil seal mechanisms 120 are symmetrically arranged. T-shaped moving rings 112 are fixedly installed at both ends of the main shaft 110, and the T-shaped moving rings 112 are located in the corresponding oil seal mechanisms 120. The outer wall of the T-shaped moving rings 112 is provided with spiral grooves 113. By setting the spiral grooves 113, the cooling lubricating oil can move along the spiral grooves 113 when the centrifugal pump is working, which facilitates lubrication and cooling. At the same time, the spiral grooves 113 also have the function of transporting the cooling lubricating oil, so that it flows out through the oil outlet pipe 129.

[0024] like Figure 2 , Figures 12 to 17 As shown, the oil seal mechanism 120 includes an inner cylinder shell 121, which is fixedly connected to the outer wall of the water suction tank 220 by bolts (refer to the attached instruction manual). Figure 2 As shown), the outer shell 125 is bolted to the end wall of the inner shell 121. A sealing ring is provided at the connection between the inner shell 121 and the outer shell 125 (see attached instruction manual). Figure 14 As shown), positioning sleeves 130 are fixedly installed on the inner walls of both the outer shell 125 and the inner shell 121. The inner wall of the positioning sleeve 130 has a fitting groove 131, and a spring column 132 is fixedly installed in the fitting groove 131. There are multiple sets of spring columns 132 arranged in a circumferential array. The end walls of the multiple sets of spring columns 132 are fixedly installed with the same pressure sleeve 133. The end wall of the pressure sleeve 133 is fixedly installed with a stationary ring 134, and the end wall of the stationary ring 134 contacts the end wall of the T-shaped moving ring 112. In this centrifugal pump, dynamic sealing is achieved through the contact between the stationary ring 134 and the T-shaped moving ring 112. The spring column 132 is in a compressed state under working conditions, so that the stationary ring 134 tightly presses the T-shaped moving ring 112. The inner wall of the end of the outer shell 125 is rotatably connected to the main shaft 110 through multiple sets of sealing rings and bearings. The multiple sets of sealing rings achieve sealing between the outer shell 125 and the main shaft 110.

[0025] like Figure 13 and Figure 16As shown, an annular sealing shell 123 is fixedly installed on the inner wall of the front end of the inner cylinder shell 121. An elastic gas sealing membrane 124 is sealed and fixed to the inner wall of the annular sealing shell 123. The elastic gas sealing membrane 124 is made of wear-resistant rubber material and is in movable contact with the outer wall of the T-shaped moving ring 112. When the annular sealing shell 123 is filled with air, the air pressure inside the annular sealing shell 123 increases, which can squeeze the elastic gas sealing membrane 124, so that the elastic gas sealing membrane 124... The inner cylinder shell 121 has two sets of air inlet pipes 122 fixedly installed on the outer wall of the front end of the inner cylinder shell 121. The air inlet pipes 122 are connected to the inside of the annular sealing shell 123. The air inlet pipes 122 are connected to an air pump. When the centrifugal pump is working, it can fill the annular sealing shell 123 with air, so that the elastic air sealing diaphragm 124 is compressed and expanded, and makes it contact the outer wall of the T-shaped moving ring 112.

[0026] like Figures 13 to 18 As shown, an oil inlet pipe 126 is fixedly installed on the inner wall of the outer cylinder shell 125. An annular oil guide groove 127 is formed on the inner wall of the outer cylinder shell 125, and the annular oil guide groove 127 is connected to the oil inlet pipe 126. After the cooling lubricating oil flows into the annular oil guide groove 127, it can flow into the oil seal mechanism 120 through the oil outlet hole 128 on the annular oil guide groove 127. Multiple sets of oil outlet holes 128 are evenly formed on the inner wall of the annular oil guide groove 127. Oil outlet pipes 129 are fixedly installed on the outer walls of both ends of the inner cylinder shell 121, and the lubricating oil guided by the annular oil guide groove 127 can be discharged through the oil outlet pipe 129. The cooling lubricating oil in the oil drain manifold 162 can enter the annular oil guide groove 127 through the oil inlet pipe 126, and flow into the oil seal mechanism 120 through the oil outlet hole 128 on the annular oil guide groove 127 (the specific flow path is shown in the appendix of the instruction manual). Figure 18 (As shown in the shaded area), the cooling lubricating oil can cool and lubricate the T-shaped moving ring 112, positioning sleeve 130, spring column 132, pressure sleeve 133 and stationary ring 134 in the oil seal mechanism 120, which can effectively reduce their wear. The outer wall of the left outer shell 125 is fixedly installed with a left seal 140 by bolts, and the outer wall of the right outer shell 125 is fixedly installed with a right seal 150 by bolts. Both the left seal 140 and the right seal 150 are filled with cooling lubricating oil. Both the left seal 140 and the right seal 150 are sealed and connected to the corresponding two sets of oil outlet pipes 129. When the lubricating oil discharged from the annular oil guide groove 127 is discharged from the oil outlet pipe 129, it can enter the corresponding left seal 140 and right seal 150.

[0027] like Figures 6 to 12As shown, a central rotating cylinder 141 is fixedly installed on the outer wall of the middle part of the left casing 140. The main shaft 110 rotates through the inner wall of the central rotating cylinder 141 via a bearing. A packing seal ring 143 is fixedly installed at the connection between the main shaft 110 and the central rotating cylinder 141, which provides a sealing function. A negative pressure vane 142 is fixedly installed on the end wall of the main shaft 110 located inside the central rotating cylinder 141. The negative pressure vane 142 generates negative pressure inside the central rotating cylinder 141, thereby drawing out cooling and lubricating oil. The main shaft 110 rotates through the right casing 150 via a bearing. A second packing seal ring 151 is fixedly installed at the connection between the main shaft 110 and the right casing 150, which provides a sealing function. A cooling fan is fixedly installed on the right end wall of the main shaft 110. Fan 152 and right casing 150 have multiple sets of cooling fins 153 arranged in a circular array fixedly installed on their outer walls. The cooling fins 153 cool the lubricating oil inside the right casing 150. Similarly, the cooling fan 152 dissipates heat from the cooling fins 153. A protective cover 154 is bolted to the outer wall of the right casing 150, providing protection for the cooling fan 152 and the cooling fins 153. The protective cover 154 protects the cooling fan 152 and the cooling fins 153 from damage during operation. Similarly, when the main shaft 110 rotates, it drives the right-side cooling fan 152 to rotate, thereby dissipating heat from the cooling fins 153. Simultaneously, during the operation of the centrifugal pump... During the process, the cooling lubricating oil can cool and lubricate the T-shaped moving ring 112, positioning sleeve 130, spring column 132, pressure sleeve 133 and stationary ring 134 in the oil seal mechanism 120, reducing their wear. At the same time, after the cooling lubricating oil flows, it can absorb the heat generated. After entering the right seal shell 150, it can be absorbed by the cooling fins 153. An oil guide pipe 160 is fixedly installed on the outer wall of the intermediate cylinder 141, and the oil guide pipe 160 is connected to the inside of the intermediate cylinder 141. An oil inlet pipe 163 is fixedly installed on the inner wall of the left seal shell 140, and the oil inlet pipe 163 is sealed and connected to the inside of the intermediate cylinder 141. A filter 161 is fixedly installed on the outer wall of the pump housing 200. The filter 161 can filter out impurities inside the cooling lubricating oil. The other end of 160 is connected to the input end of filter 161. The output end of filter 161 is fixedly installed with an oil drain manifold 162. The cooling lubricating oil filtered by filter 161 can enter the oil drain manifold 162 to prevent impurities from entering the oil seal mechanism 120. Both sets of oil inlet pipes 126 are sealed and connected to the inside of the oil drain manifold 162. The cooling lubricating oil in the oil drain manifold 162 can enter the oil seal mechanism 120 through the oil inlet pipes 126. A connecting pipe 164 is fixedly installed on the inner wall of the right seal 150, and the other end of the connecting pipe 164 is sealed and connected to the inside of the left seal 140. The connecting pipe 164 connects the left seal 140 and the right seal 150 together, which allows the cooling lubricating oil to circulate, facilitating heat dissipation and lubrication.

[0028] The working principle of the technical solution provided by this invention is as follows: When the centrifugal pump is working, the main shaft 110 drives the double-suction pump impeller 111 to rotate. Under the action of centrifugal force, the water suction grooves 220 at both ends of the double-suction pump impeller 111 can draw external liquid through the water suction port 230. Driven by the double-suction pump impeller 111, the liquid is pressurized and discharged through the drain port 240. At this time, the axial forces on both ends of the double-suction pump impeller 111 are the same in magnitude and opposite in direction, thus canceling each other out and effectively reducing the loss of the centrifugal pump. Before the centrifugal pump starts working, the liquid can enter the space between the stationary ring 134 and the inner cylinder shell 121 through the gap between the T-shaped moving ring 112 and the inner cylinder shell 121. When the centrifugal pump is working, high-pressure gas is introduced into the air inlet pipe 122, which causes the elastic air seal diaphragm 124 to expand outward, so that the outer wall of the elastic air seal diaphragm 124... Contacting the outer wall of the T-shaped rotating ring 112, it effectively prevents external liquid from entering between the stationary ring 134 and the inner cylinder shell 121. Simultaneously, the contact between the stationary ring 134 and the T-shaped rotating ring 112 achieves dynamic sealing. Meanwhile, the main shaft 110 drives the negative pressure vane 142 to rotate, thereby creating a negative pressure chamber within the intermediate rotating cylinder 141. Cooling lubricating oil is drawn from the left sealing shell 140 through the oil inlet pipe 163. Simultaneously, through the filtration of the oil guide pipe 160 and the filter 161, the cooling lubricating oil is discharged into the main drain pipe 162. At this time, the cooling lubricating oil in the main drain pipe 162 can enter the annular oil guide groove 127 through the oil inlet pipe 126, and then flow into the oil seal mechanism 120 through the oil outlet hole 128 on the annular oil guide groove 127 (for specific flow paths, refer to the attached instruction manual). Figure 18 (As shown in the shaded area), the cooling and lubricating oil can cool and lubricate the T-shaped moving ring 112, positioning sleeve 130, spring column 132, pressure sleeve 133 and stationary ring 134 in the oil seal mechanism 120, which can effectively reduce their wear.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A low-loss, high-efficiency centrifugal pump, comprising an actuator (100) and a pump housing (200), wherein the actuator (100) is installed inside the pump housing (200), characterized in that, The execution component (100) includes a main shaft (110), a double-suction pump impeller (111) is fixedly installed in the middle of the main shaft (110), an impeller groove (210) is opened in the inner wall of the middle part of the pump casing (200), the double-suction pump impeller (111) is located in the impeller groove (210) and is rotatably connected to the inner wall of the impeller groove (210), a water suction groove (220) is opened on both sides of the middle part of the pump casing (200), and the water suction groove (220) is connected to the inside of the impeller groove (210), a water suction port (230) is opened at the front end of the pump casing (200), and the water suction port (230) is connected to the two sets of water suction grooves (220), and a drain port (240) is opened at the end of the pump casing (200), and the drain port (240) is connected to the impeller groove (210).

2. The low-loss, high-efficiency centrifugal pump according to claim 1, characterized in that, Oil seal mechanisms (120) are installed at both ends of the main shaft (110), and the oil seal mechanisms (120) are connected to the outer wall of the corresponding water suction tank (220). The two sets of oil seal mechanisms (120) are symmetrically arranged. T-shaped moving rings (112) are fixedly installed at both ends of the main shaft (110), and the T-shaped moving rings (112) are located inside the corresponding oil seal mechanisms (120). The outer wall of the T-shaped moving rings (112) is provided with spiral grooves (113).

3. The low-loss, high-efficiency centrifugal pump according to claim 2, characterized in that, The oil seal mechanism (120) includes an inner cylinder shell (121), which is fixedly connected to the outer wall of the water suction tank (220) by bolts. An outer cylinder shell (125) is fixedly installed on the end wall of the inner cylinder shell (121) by bolts. Positioning sleeves (130) are fixedly installed on the inner walls of both the outer cylinder shell (125) and the inner cylinder shell (121). The inner wall of the positioning sleeve (130) is provided with a fitting groove (131). The fitting groove (131) contains... A spring column (132) is fixedly installed. Multiple sets of spring columns (132) are arranged in a circular array. The end walls of multiple sets of spring columns (132) are fixedly installed with the same pressure sleeve (133). The end wall of the pressure sleeve (133) is fixedly installed with a stationary ring (134). The end wall of the stationary ring (134) is in contact with the end wall of the T-shaped moving ring (112). The inner wall of the end of the outer shell (125) is rotatably connected to the main shaft (110) through multiple sets of sealing rings and bearings.

4. The low-loss, high-efficiency centrifugal pump according to claim 3, characterized in that, An annular sealing shell (123) is fixedly installed on the inner wall of the front end of the inner cylinder shell (121). An elastic sealing membrane (124) is sealed and fixedly connected to the inner wall of the annular sealing shell (123), and the elastic sealing membrane (124) is in contact with the outer wall of the T-shaped moving ring (112). Two sets of air inlet pipes (122) are fixedly installed on the outer wall of the front end of the inner cylinder shell (121), and the air inlet pipes (122) are connected to the inside of the annular sealing shell (123).

5. The low-loss, high-efficiency centrifugal pump according to claim 3, characterized in that, An oil inlet pipe (126) is fixedly installed on the inner wall of the outer cylinder shell (125). An annular oil guide groove (127) is opened on the inner wall of the outer cylinder shell (125), and the annular oil guide groove (127) is connected to the oil inlet pipe (126). Multiple sets of oil outlet holes (128) are evenly opened on the inner wall of the annular oil guide groove (127). An oil outlet pipe (129) is fixedly installed on the outer walls of both ends of the inner cylinder shell (121), and the lubricating oil led out by the annular oil guide groove (127) can be discharged through the oil outlet pipe (129).

6. The low-loss, high-efficiency centrifugal pump according to claim 5, characterized in that, The outer wall of the outer cylinder shell (125) on the left side is fixedly installed with a left seal shell (140) by bolts, and the outer wall of the outer cylinder shell (125) on the right side is fixedly installed with a right seal shell (150) by bolts. Both the left seal shell (140) and the right seal shell (150) are filled with cooling lubricating oil, and both the left seal shell (140) and the right seal shell (150) are sealed and connected to the corresponding two sets of oil outlet pipes (129).

7. The low-loss, high-efficiency centrifugal pump according to claim 6, characterized in that, A transfer cylinder (141) is fixedly installed on the outer wall of the middle part of the left cover (140). The main shaft (110) rotates through the inner wall of the transfer cylinder (141) via a bearing. A packing seal ring (143) is fixedly installed at the connection between the main shaft (110) and the transfer cylinder (141). A negative pressure blade (142) is fixedly installed on the end wall of the main shaft (110) located inside the transfer cylinder (141).

8. The low-loss, high-efficiency centrifugal pump according to claim 6, characterized in that, The main shaft (110) rotates through the right cover (150) via a bearing. A packing seal ring (151) is fixedly installed at the connection between the main shaft (110) and the right cover (150). A cooling fan (152) is fixedly installed on the right end wall of the main shaft (110). Multiple sets of cooling fins (153) arranged in a circular array are fixedly installed on the outer wall of the right cover (150). A protective cover (154) is fixedly installed on the outer wall of the right cover (150) by bolts, and the protective cover (154) provides protection for the cooling fan (152) and the cooling fins (153).

9. The low-loss, high-efficiency centrifugal pump according to claim 7, characterized in that, An oil guide pipe (160) is fixedly installed on the outer wall of the transfer cylinder (141), and the oil guide pipe (160) is connected to the inside of the transfer cylinder (141). An oil inlet pipe (163) is fixedly installed on the inner wall of the left sealing shell (140), and the oil inlet pipe (163) is sealed and connected to the inside of the transfer cylinder (141). A filter (161) is fixedly installed on the outer wall of the pump housing (200), and the other end of the oil guide pipe (160) is connected to the input end of the filter (161).

10. The low-loss, high-efficiency centrifugal pump according to claim 9, characterized in that, The filter (161) is fixedly installed with an oil drain manifold (162) at its output end. Both sets of oil inlet pipes (126) are sealed and connected to the inside of the oil drain manifold (162). A connecting pipe (164) is fixedly installed on the inner wall of the right sealing shell (150), and the other end of the connecting pipe (164) is sealed and connected to the inside of the left sealing shell (140).

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