Oblique flow type pump turbine

Abstract

The utility model relates to the technical field of pump turbines, and discloses an oblique flow type pump turbine which comprises a pump shell, a gearbox, a generator motor, a rotor protection pipe assembly, a rotor assembly, an impeller, a sealing assembly and an air outlet pipe. The rotor protection pipe assembly is fixedly arranged in the pump cavity, the top end is in sealed connection with the top plate, a liquid inlet is formed in the bottom end, a liquid outlet flow channel is formed between the rotor protection pipe assembly and the pump shell, and the upper portion of the liquid outlet flow channel communicates with the liquid outlet. The top end of the rotor assembly is in transmission connection with the generator motor, the rotor assembly extends in the height direction of the pump shell, and the rotor protection pipe assembly sleeves the upper portion of the rotor assembly. The impeller is fixedly arranged on the lower portion of the rotor assembly. The sealing assembly sleeves the rotor assembly and is in sealing connection with the rotor assembly, and the bottom end of the sealing assembly is in sealing connection with the top plate. One end of the air outlet pipe communicates with the top of the inner cavity of the rotor protection pipe assembly, and the other end of the air outlet pipe extends to the outer side of the pump shell.

Description

Technical Field

[0001] The utility model relates to the technical field of water turbines, in particular to an oblique flow water pump water turbine. Background Art

[0002] At present, in the existing diagonal flow pump turbine, since there is a large amount of air in the internal cavity of the rotor protective tube assembly (a tubular structure covering the upper part of the rotor assembly) before the diagonal flow pump turbine is started, when the diagonal flow pump turbine is started, as the liquid in the inner cavity of the rotor protective tube assembly continues to rise, the liquid continuously compresses the air in the inner cavity of the rotor protective tube assembly, so that the air in the rotor protective tube assembly gathers at the sealing assembly on the upper part of the diagonal flow pump turbine. The air prevents the liquid pumped by the diagonal flow pump turbine from contacting the sealing assembly (a component used to seal the gap between the rotor assembly and the diagonal flow pump turbine body) and entering the sealing assembly for lubrication, resulting in the sealing assembly being exposed to the air inside the rotor protective tube assembly. During the operation of the diagonal flow pump turbine, the sealing assembly will experience dry friction, heat, lock or wear. In severe cases, the upper shaft of the diagonal flow pump turbine will experience serious bending deformation or breakage. At the same time, since the air accumulation cannot be discharged, as the pressure of the liquid pumped by the diagonal flow pump turbine continues to increase, the accumulated air is continuously compressed by the high-pressure liquid to form high-pressure gas present in the sealing component, and the dry friction heat of the sealing component is transmitted to the accumulated gas, causing the gas to continue to expand thermally to form high-temperature and high-pressure gas present in the rotor protective tube component and the sealing component. The high-temperature and high-pressure gas has great expansion destructiveness and is prone to explosion, and will cause thermal expansion, bending deformation and softening to the rotor protective tube component and sealing component of the diagonal flow pump turbine, seriously reducing the operating stability, reliability and safety of the diagonal flow pump turbine, shortening the operation and service life of the diagonal flow pump turbine, and increasing the operation, inspection and maintenance costs of the diagonal flow pump turbine.

[0003] Therefore, there is an urgent need for a diagonal flow pump turbine to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a diagonal flow pump turbine, which solves the problem that the air in the rotor protection tube assembly is gathered at the top of the rotor protection tube assembly and cannot be discharged when the diagonal flow pump turbine is turned on.

[0005] In order to achieve the above object, the utility model provides a diagonal flow pump turbine, comprising:

[0006] A pump housing, comprising a casing and a top plate arranged at the top of the casing, wherein the top plate and the casing are arranged to form a pump cavity, a first liquid inlet is arranged at the bottom end of the casing, and a liquid outlet is arranged on the upper side wall;

[0007] A gear box disposed above the pump housing;

[0008] A generator motor, which is arranged above the pump housing and is drivingly connected to the gear box;

[0009] A rotor protection tube assembly is fixedly arranged in the pump cavity, the top end of which is sealed and connected to the top plate, and the bottom end of which is provided with a liquid inlet. The rotor protection tube assembly and the pump housing are surrounded to form a liquid outlet channel, and the upper part of the liquid outlet channel is connected to the liquid outlet;

[0010] A rotor assembly, the top end of which is drivingly connected to the generator motor, the rotor assembly extends along the height direction of the pump housing, and the rotor protection tube assembly is sleeved on the upper part of the rotor assembly;

[0011] An impeller fixedly disposed at the lower portion of the rotor assembly;

[0012] A sealing assembly is sleeved on the rotor assembly and is sealed to the rotor assembly, wherein the bottom end of the sealing assembly is sealed to the top plate;

[0013] An air outlet pipe has one end connected to the top of the inner cavity of the rotor protection tube assembly and the other end extending to the outside of the pump housing. An air outlet control valve is provided on the air outlet pipe.

[0014] As an improvement of the above technical solution, it also includes a first sliding guide bearing assembly, the first sliding guide bearing assembly is fixedly arranged on the top plate, the top end of the rotor assembly is rotatably arranged in the first sliding guide bearing assembly, the first sliding guide bearing assembly, the sealing assembly and the rotor assembly are surrounded to form a lubrication pressure relief chamber, the first sliding guide bearing assembly is provided with a first flow hole, the first flow hole connects the lubrication pressure relief chamber with the inner cavity of the rotor protection tube assembly, and the air outlet pipe is connected to the lubrication pressure relief chamber.

[0015] As an improvement of the above technical solution, it also includes:

[0016] A mounting bracket, which is arranged above the pump casing, the gear box and the generator motor are both arranged on the mounting bracket, and the mounting bracket is connected to a first mounting foundation of the water pump turbine;

[0017] A thrust bearing assembly is arranged on the mounting bracket, and the rotor assembly is rotatably connected to the mounting bracket through the thrust bearing assembly.

[0018] As an improvement of the above technical solution, it also includes:

[0019] An extended bearing box, the top end of which is fixedly connected to the bottom end of the mounting bracket, and the thrust bearing assembly is arranged above the extended bearing box;

[0020] The bearing assembly is arranged at the bottom end of the elongated bearing box, and the rotor assembly is rotatably connected to the elongated bearing box through the bearing assembly.

[0021] As an improvement of the above technical solution, a cooling and lubrication pipeline is also included, and the cooling and lubrication pipeline includes:

[0022] A first connecting pipe, wherein a cooling chamber is arranged in the elongated bearing box, a first end of the first connecting pipe is connected to the lubrication pressure relief chamber, and a second end of the first connecting pipe is connected to the cooling chamber;

[0023] A second connecting pipe, wherein a lubrication cavity is provided in the thrust bearing assembly, a first end of the second connecting pipe is connected to the cooling cavity, and a second end of the second connecting pipe is connected to the lubrication cavity;

[0024] A third connecting pipe, wherein a cooling channel is provided in the gear box, a first end of the third connecting pipe is connected to the lubrication cavity, and a second end of the third connecting pipe is connected to the cooling channel;

[0025] A fourth connecting pipe has a first end connected to the cooling channel and a second end connected to the air outlet pipe.

[0026] As an improvement of the above technical solution, the cooling and lubrication pipeline further includes:

[0027] a fifth connecting pipe, a first end of which is connected to the second end of the fourth connecting pipe;

[0028] A sixth connecting pipe has a first end connected to the second end of the fifth connecting pipe, and a second end connected to the installation tank of the diagonal flow pump turbine. A first liquid outlet control valve is provided on the sixth connecting pipe.

[0029] As an improvement of the above technical solution, it also includes a suction bell pipe, which is arranged at the bottom end of the pump housing, and the top of the suction bell pipe is connected to the first liquid inlet, and the suction bell pipe is provided with a jet hole that connects the inner and outer sides of the suction bell pipe and is inclined toward the first liquid inlet;

[0030] The anti-cavitation liquid outlet pipe has a first end connected to the second end of the fifth connecting pipe, and a second end connected to an end of the jet hole extending to the outer wall of the suction bell pipe. The anti-cavitation liquid outlet pipe is provided with a second liquid outlet control valve.

[0031] As an improvement of the above technical solution, a plurality of jet holes are provided, and the plurality of jet holes are arranged at intervals along the circumference of the suction bell tube. An annular liquid collecting chamber is provided on the outside of the suction bell tube and surrounds the suction bell tube along the circumference of the suction bell tube. One end of the jet holes extending to the outer wall of the suction bell tube is connected to the annular liquid collecting chamber, and the second end of the anti-cavitation liquid outlet pipe is connected to the annular liquid collecting chamber.

[0032] As an improvement of the above technical solution, it also includes a guide pipe, which is arranged at the lower part of the pump chamber and is sleeved on the rotor assembly. A guide channel is arranged in the guide pipe, the impeller is arranged between the guide pipe and the rotor assembly, and the liquid inlet is connected to the guide channel.

[0033] As an improvement of the above technical solution, a plurality of impellers are provided, and the plurality of impellers are arranged at intervals along the extension direction of the rotor assembly.

[0034] Compared with the prior art, the utility model has the following beneficial effects:

[0035] The utility model provides a diagonal flow water pump turbine. When used as a water pump, the generator motor drives the rotor assembly to rotate after being decelerated by the gear box, thereby driving the impeller to pump liquid or perform high-level pumped water storage, etc. The liquid enters the pump casing from the first liquid inlet and outlet and flows out of the pump casing from the second liquid inlet and outlet. When used as a water turbine for power generation, the high-level water head enters the pump casing from the second liquid inlet and outlet and flows out of the pump casing from the first liquid inlet and outlet. The water head drives the rotor assembly to rotate through the impeller, and the rotor assembly drives the generator motor to operate to perform power generation after being accelerated by the gear box. In addition, the oblique flow water pump turbine of the utility model is provided with an air outlet pipe connecting the top of the rotor protective tube assembly and the outside of the pump casing, and an air outlet control valve is provided on the air outlet pipe, so that when the oblique flow water pump turbine is started, the air outlet control valve on the air outlet pipe can be opened, and the liquid entering the pump cavity enters the inner cavity of the rotor protective tube assembly through the liquid inlet. As the liquid continues to rise in the rotor protective tube assembly, the rotor protective tube assembly can be discharged to the outside of the pump body through the air outlet pipe, thereby solving the problem that the air in the rotor protective tube assembly gathers at the top of the rotor protective tube assembly and cannot be discharged when the oblique flow water pump turbine is started, and further solving the problem that continuous dry friction at the sealing assembly is prone to damage to the sealing assembly and nearby components. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of a diagonal flow pump turbine provided by an embodiment of the utility model;

[0037] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0038] Figure 3 yes Figure 1 Enlarged view of point B in the middle.

[0039] In the figure:

[0040] 11. Pump casing; 111. Casing; 112. Top plate;

[0041] 12. Gear box;

[0042] 13. Generator motor;

[0043] 14. rotor protection tube assembly; 141. liquid inlet;

[0044] 142, upper protective tube; 143, middle protective tube; 144, lower protective tube;

[0045] 15. Rotor assembly;

[0046] 16. Impeller;

[0047] 17. Sealing assembly;

[0048] 171, sealing seat; 172, sealing ring; 173, sealing sleeve;

[0049] 18. Air outlet pipe; 181. Air outlet control valve;

[0050] 19. A first sliding guide bearing assembly;

[0051] 20. Mounting bracket; 201. Bearing bracket; 202. Motor bracket;

[0052] 21. Thrust bearing assembly;

[0053] 22. Bearing assembly;

[0054] 23. Lengthen the bearing box;

[0055] 24, cooling and lubrication pipeline; 241, first connecting pipe; 242, second connecting pipe; 243, third connecting pipe; 244, fourth connecting pipe; 245, fifth connecting pipe; 246, sixth connecting pipe; 2461, first liquid outlet control valve;

[0056] 25. Suction bell tube; 251. Jet hole; 252. Annular liquid collecting chamber;

[0057] 26. Anti-cavitation liquid outlet pipe; 261. Second liquid outlet control valve;

[0058] 27. Flow guide pipe;

[0059] 28. Lubrication inlet pipe; 281. Lubrication control valve; 282. Pressure sensor;

[0060] 29. A second sliding guide bearing assembly;

[0061] 30. A first fixing plate 30;

[0062] 31. Second fixing plate 31;

[0063] 100, first liquid inlet and outlet; 200, second liquid inlet and outlet;

[0064] 300. The first installation foundation of the pump turbine;

[0065] 400, lubrication pressure relief chamber; 500, lubrication chamber; 600, cooling chamber;

[0066] 700. Second installation foundation of pump turbine. DETAILED DESCRIPTION

[0067] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0068] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0070] In the description of this embodiment, the terms "upper", "lower", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0071] like Figure 1-3As shown, an oblique flow pump turbine of an embodiment of the utility model comprises a pump casing 11, a gear box 12, a generator motor 13, a rotor protection tube assembly 14, a rotor assembly 15, an impeller 16, a sealing assembly 17 and an air outlet pipe 18. The pump casing 11 comprises a casing 111 and a top plate 112 arranged at the top of the casing 111. The top plate 112 and the casing 111 are arranged to form a pump cavity. The bottom end of the casing 111 is provided with a first liquid inlet and outlet 100, and the upper side wall is provided with a second liquid inlet and outlet 200. The gear box 12 is arranged above the pump casing 11. The generator motor 13 is arranged above the pump casing 11 and is transmission-connected with the gear box 12. The rotor protection tube assembly 14 is fixedly arranged in the pump cavity, the top end is sealedly connected with the top plate 112, the bottom end is provided with a liquid inlet 141, a liquid outlet flow channel is formed between the rotor protection tube assembly 14 and the pump casing 11, and the upper part of the liquid outlet flow channel is connected with the second liquid inlet and outlet 200. The top of the rotor assembly 15 is transmission-connected to the gearbox 12, that is, the rotor assembly 15 is transmission-connected to the generator motor 13 through the gearbox 12. The rotor assembly 15 extends along the height direction of the pump housing 11 and extends into the pump chamber through the top plate 112. The rotor guard tube assembly 14 is sleeved on the upper part of the rotor assembly 15. The specific structure of the rotor assembly 15 is common knowledge in the art and will not be repeated here. The impeller 16 is fixedly arranged at the lower part of the rotor assembly 15. The sealing assembly 17 is sleeved on the rotor assembly 15 and is sealingly connected to the rotor assembly 15. The bottom end of the sealing assembly 17 is sealingly connected to the top plate 112. One end of the air outlet pipe 18 is connected to the top of the inner cavity of the rotor guard tube assembly 14, and the other end extends to the outside of the pump housing 11. The air outlet pipe 18 is provided with an air outlet control valve 181.

[0072] The diagonal flow pump turbine provided in this embodiment, when used as a water pump, the generator motor 13 drives the rotor assembly 15 to rotate after being decelerated by the gear box 12, thereby driving the impeller 16 to pump liquid or perform high-level pumped storage, etc., and the liquid enters the pump casing 11 from the first and second inlet and outlet ports 200, and flows out of the pump casing 11 from the second inlet and outlet ports 200; when used as a turbine for power generation, the high-level water head enters the pump casing 11 from the second inlet and outlet ports 200, and flows out of the pump casing 11 from the first and second inlet and outlet ports 200, and the water head drives the rotor assembly 15 to rotate through the impeller 16, and the rotor assembly 15 drives the generator motor 13 to operate to perform power generation operations after being accelerated by the gear box 12. In addition, the diagonal flow pump turbine provided in this embodiment is provided with an air outlet pipe 18 connecting the top of the rotor protective tube assembly 14 and the outside of the pump casing 11, and an air outlet control valve 181 is provided on the air outlet pipe 18, so that when the diagonal flow pump turbine is started, the air outlet control valve 181 on the air outlet pipe 18 can be opened, and the liquid entering the pump cavity enters the inner cavity of the rotor protective tube assembly 14 through the liquid inlet 141. As the liquid continues to rise in the rotor protective tube assembly 14, the rotor protective tube assembly 14 can be discharged to the outside of the pump body through the air outlet pipe 18, thereby solving the problem that the air in the rotor protective tube assembly 14 gathers at the top of the rotor protective tube assembly 14 and cannot be discharged when the diagonal flow pump turbine is started, and further solves the problem that continuous dry friction wear at the sealing assembly 17 is prone to damage the sealing assembly 17 and nearby components.

[0073] Alternatively, if Figure 1 and Figure 2 As shown, the sealing assembly 17 includes a sealing seat 171, a sealing ring 172 and a sealing sleeve 173. The sealing seat 171 is sleeved on the rotor assembly 15, and the bottom end is connected to the top plate 112. The sealing ring 172 is sleeved on the rotor assembly 15 and is sandwiched between the sealing seat 171 and the rotor assembly 15. The sealing sleeve 173 is sleeved on the rotor assembly 15 and is sandwiched between the sealing ring 172 and the rotor assembly 15. The sealing seat 171, the sealing ring 172 and the sealing sleeve 173 cooperate to achieve a waterproof seal of the gap between the upper part of the rotor assembly 15 and the top plate 112.

[0074] Alternatively, if Figure 1As shown, the diagonal flow pump turbine provided in this embodiment also includes a first sliding guide bearing assembly 19, which is fixedly arranged on the top plate 112, and the top end of the rotor assembly 15 is arranged in the first sliding guide bearing assembly 19. The first sliding guide bearing assembly 19, the sealing assembly 17 and the rotor assembly 15 are surrounded to form a lubricating pressure relief chamber 400. The first sliding guide bearing assembly 19 is provided with a first flow hole, and the first flow hole connects the lubricating pressure relief chamber 400 with the inner cavity of the rotor protection tube assembly 14, and the air outlet pipe 18 is connected with the lubricating pressure relief chamber 400. By providing the first sliding guide bearing assembly 19, a stable rotation connection between the rotor assembly 15 and the top plate 112 of the pump housing 11 is achieved. In addition, by providing the first flow hole, during the process of the liquid driven by the impeller 16 rising in the pump housing 11, the gas in the rotor protection tube assembly 14 can enter the lubricating pressure relief chamber 400 through the first flow hole, and enter the air outlet pipe 18 through the lubricating pressure relief chamber 400 for discharge.

[0075] Alternatively, if Figure 1 As shown, the diagonal flow pump turbine provided in this embodiment further includes a mounting bracket 20, a first fixing plate 30 and a thrust bearing assembly 21. The mounting bracket 20 is arranged above the pump casing 11, and the gear box 12 and the generator motor 13 are both arranged on the mounting bracket 20, and the mounting bracket 20 is connected to the first mounting base 300 of the pump turbine. The thrust bearing assembly 21 is arranged on the mounting bracket 20, and the rotor assembly 15 is rotatably connected to the mounting bracket 20 through the thrust bearing assembly 21. The mounting bracket 20 plays a supporting role for the generator motor 13 and the gear box 12, and by arranging the thrust bearing assembly 21, a stable rotation connection between the top of the rotor assembly 15 and the mounting bracket 20 is achieved.

[0076] Furthermore, if Figure 1 As shown, the diagonal flow pump-turbine provided in this embodiment further includes a first fixing plate 30 , and the bottom end of the mounting bracket 20 is fixedly connected to the first mounting base 300 of the pump-turbine through the first fixing plate 30 .

[0077] Further, such as Figure 1 As shown, the diagonal flow pump turbine provided in this embodiment further includes a second fixing plate 31, which is fixedly arranged on the upper part of the pump casing 11, and the pump casing 11 is fixedly connected to the pump turbine second mounting base 700 through the second fixing plate 31. The pump turbine second mounting base 700 is arranged at intervals in the vertical direction.

[0078] Alternatively, if Figure 1 and Figure 2As shown, the diagonal flow pump turbine provided in this embodiment further includes an extended bearing box 23 and a bearing assembly 22. The top end of the extended bearing box 23 is fixedly connected to the bottom end of the mounting bracket 20, and the thrust bearing assembly 21 is arranged above the extended bearing box 23. The bearing assembly 22 is arranged at the bottom end of the extended bearing box 23, and the rotor assembly 15 is rotatably connected to the extended bearing box 23 through the bearing assembly 22. Thereby, the rotation stability of the upper part of the rotor assembly 15 is further improved.

[0079] Furthermore, if Figure 1 and Figure 2 As shown, the mounting bracket 20 includes a bearing bracket 201 and a motor bracket 202 , the top of the bearing bracket 201 is fixedly connected to the bottom of the motor bracket 202 , the extended bearing box 23 is fixedly arranged at the bottom of the bearing bracket 201 , and the generator motor 13 is arranged at the top of the motor bracket 202 .

[0080] Alternatively, if Figure 1 As shown, the vertical diagonal flow pump with exhaust function provided in this embodiment also includes a second sliding guide bearing assembly 29 arranged in the pump chamber, and the second sliding guide bearing assembly 29 includes a second sleeve, a second sliding guide bearing, a second guide bearing seat and a second guide bearing support. The second sleeve is sleeved on the rotor assembly 15. The second sliding guide bearing is sleeved on the second sleeve. The second sliding guide bearing is installed in the second guide bearing seat. The second guide bearing support is fixedly arranged in the pump housing 11, and the second guide bearing seat is installed on the guide bearing support. The second sliding guide bearing assembly 29 realizes the rotational connection between the upper part of the rotor bearing and the casing 111, so that the rotor assembly 15 can rotate stably.

[0081] Alternatively, if Figure 1 As shown, the rotor protection tube assembly 14 includes an upper protection tube 142, a middle protection tube 143 and a lower protection tube 144. The top end of the upper protection tube 142 is sealed and connected to the top plate 112. A second sliding guide bearing assembly 29 is arranged between the top end of the middle protection tube 143 and the bottom end of the upper protection tube 142. The top end of the middle protection tube 143 is connected to the bottom end of the upper protection tube 142 through the second sliding guide bearing assembly 29. The second sliding guide bearing assembly 29 is provided with a second flow hole. The inner cavity of the middle protection tube 143 is connected to the inner cavity of the upper protection tube 142 through the second flow hole. A second sliding guide bearing assembly 29 is arranged between the top end of the lower protection tube 144 and the bottom end of the middle protection tube 143. The top end of the lower protection tube 144 is connected to the bottom end of the middle protection tube 143 through the second sliding guide bearing assembly 29. The inner cavity of the middle protection tube 143 is connected to the inner cavity of the upper protection tube 142 through the second flow hole. The liquid inlet 141 is arranged at the bottom end of the lower protection tube 144. The liquid pumped by the impeller 16 can enter the inner cavity of the rotor guard tube assembly 14 through the liquid inlet 141 .

[0082] Alternatively, if Figure 1 and Figure 2As shown, the diagonal flow pump turbine provided in this embodiment also includes a cooling lubrication pipeline 24, which includes a first connecting pipe 241, a second connecting pipe 242, a third connecting pipe 243 and a fourth connecting pipe 244. A cooling chamber 600 is provided in the extended bearing box 23, and the first end of the first connecting pipe 241 is connected to the lubrication pressure relief chamber 400, and the second end is connected to the cooling chamber 600. A lubrication chamber 500 is provided in the thrust bearing assembly 21, and the first end of the second connecting pipe 242 is connected to the cooling chamber 600, and the second end is connected to the lubrication chamber 500. A cooling flow channel is provided in the gear box 12, and the first end of the third connecting pipe 243 is connected to the lubrication chamber 500, and the second end is connected to the cooling flow channel. The first end of the fourth connecting pipe 244 is connected to the cooling flow channel, and the second end is connected to the outlet pipe 18. During the startup process of the diagonal flow pump turbine, the gas in the rotor guard tube assembly 14 can be discharged through the first flow hole, the lubrication pressure relief chamber 400, the first connecting pipe 241, the cooling chamber 600, the second connecting pipe 242, the lubrication chamber 500, the third connecting pipe 243, the cooling flow channel, the fourth connecting pipe 244 and the outlet pipe 18.

[0083] Furthermore, if Figure 1 and Figure 2 As shown, the cooling and lubricating pipeline 24 also includes a fifth connecting pipe 245 and a sixth connecting pipe 246. The first end of the fifth connecting pipe 245 is connected to the second end of the fourth connecting pipe 244. The first end of the sixth connecting pipe 246 is connected to the second end of the fifth connecting pipe 245, and the second end is connected to the installation pool of the diagonal flow pump turbine. During the startup process when the diagonal flow pump turbine is used as a water pump, after the gas in the rotor protective tube assembly 14 is discharged, the gas outlet control valve 181 is closed, the first liquid outlet control valve 2461 is opened, and the liquid rising to the top in the pump cavity is discharged to the installation pool of the diagonal flow pump turbine through the first flow hole, the lubrication pressure relief cavity 400, the first connecting pipe 241, the cooling cavity 600, the second connecting pipe 242, the lubrication cavity 500, the third connecting pipe 243, the cooling flow channel, the fourth connecting pipe 244, the fifth connecting pipe 245 and the sixth connecting pipe 246. During the operation of the diagonal flow pump turbine, the continuous inflow and discharge of liquid can lubricate and cool the first sliding guide bearing assembly 19 and the thrust bearing assembly 21, and cool the bearing assembly 22 and the gear box 12. The installation pool of the diagonal flow pump turbine is the area near the installation position of the diagonal flow pump turbine.

[0084] Alternatively, if Figure 1 and Figure 3As shown, the diagonal flow pump turbine provided in this embodiment also includes a suction bell pipe 25, which is arranged at the bottom end of the pipe, and the top end of the suction bell pipe 25 is connected to the first liquid inlet and outlet 100. The suction bell pipe 25 is provided with a jet hole 251 that connects the inside and outside of the suction bell pipe 25 and is inclined toward the first liquid inlet and outlet 100. The first end of the anti-cavitation liquid outlet pipe 26 is connected to the second end of the fifth connecting pipe 245, and the second end is connected to an end of the jet hole 251 extending to the outer wall of the suction bell pipe 25. When the diagonal flow pump turbine is operated as a water pump, after the liquid flows in from the suction bell pipe 25, it passes through the impeller 16, and high-pressure liquid is generated in each cavity of the pump housing 11. Because the suction inlet of the first-stage impeller 16 is the lowest point of the liquid pressure, when the operating conditions of the diagonal flow pump turbine change and the pressure there is equal to or less than the vaporization pressure of the liquid, cavitation will occur in the first-stage impeller 16. When the diagonal flow pump-turbine provided in this embodiment is in operation, the air outlet control valve 181 on the air outlet pipe 18 is closed, and the high-pressure liquid in the pump chamber reaches the jet hole 251 through the inner cavity of the rotor protective tube assembly 14, the first flow hole, the lubrication pressure relief chamber 400, the first connecting pipe 241, the cooling chamber 600, the second connecting pipe 242, the lubrication chamber 500, the third connecting pipe 243, the cooling flow channel, the fourth connecting pipe 244, the fifth connecting pipe 245 and the anti-cavitation liquid outlet pipe 26, and forms a high-pressure jet through the jet hole 251 to flow into the suction inlet of the first-stage impeller 16, so as to reduce or even eliminate the generation of cavitation, improve the operating efficiency of the pump, and ensure the safe and stable operation of the pump.

[0085] Furthermore, if Figure 1 and Figure 3 As shown, a plurality of jet holes 251 are provided, and the plurality of jet holes 251 are arranged at intervals along the circumference of the suction bell tube 25. An annular liquid collecting chamber 252 is provided on the outside of the suction bell tube 25 and surrounds the suction bell tube 25 along the circumference of the suction bell tube 25. One end of the jet holes 251 extending to the outer wall of the suction bell tube 25 is connected to the annular liquid collecting chamber 252, and the second end of the anti-cavitation liquid outlet pipe 26 is connected to the annular liquid collecting chamber 252. The anti-cavitation effect is further improved by providing a plurality of jet holes 251.

[0086] Alternatively, if Figure 1 As shown, a plurality of impellers 16 are provided, and the plurality of impellers 16 are arranged at intervals along the extension direction of the rotor assembly 15. The plurality of impellers 16 connected in series can effectively improve the head of the vertical diagonal flow pump with a pre-lubrication function.

[0087] Alternatively, if Figure 1As shown, the diagonal flow pump turbine provided in this embodiment also includes a guide pipe 27, which is arranged at the lower part of the pump chamber and is sleeved on the rotor assembly 15. A guide channel is arranged in the guide pipe 27, the impeller 16 is arranged between the guide pipe 27 and the rotor assembly 15, and the liquid inlet 141 is connected to the guide channel.

[0088] Alternatively, if Figure 1 and Figure 2 As shown, the diagonal flow pump turbine provided in this embodiment further includes a lubricating inlet pipe 28, one end of which is exposed outside the pump housing 11 and is used to connect the lubricating liquid supply device, and the other end is communicated with the lubricating pressure relief chamber 400. A lubricating control valve 281 is provided on the lubricating inlet pipe 28. Before the diagonal flow pump turbine is started, the external lubricating liquid supply device can supply lubricating liquid to the lubricating pressure relief chamber 400 through the lubricating inlet pipe 28, thereby realizing pre-lubrication of the first sliding guide bearing assembly 19 and the sealing assembly 17, and the lubricating oil entering the lubricating pressure relief chamber 400 can enter the inner cavity of the rotor guard tube assembly 14 through the first flow hole, thereby pre-lubricating various components in the rotor guard tube assembly 14. Through the above-mentioned pre-lubricating operation, dry friction can be effectively avoided during the operation of the vertical diagonal flow pump with pre-lubricating function, thereby reducing the failure rate and operating cost of the vertical diagonal flow pump with pre-lubricating function, and improving the service life of the vertical diagonal flow pump with pre-lubricating function.

[0089] Alternatively, if Figure 1 and Figure 2 As shown, a pressure sensor 282, i.e., a pressure probe, is also provided on the lubricating liquid inlet pipe 28. When the pressure sensor 282 detects the pressure of the liquid pumped by the impeller 16 in the lubricating liquid inlet pipe 28, the external control system controls the air outlet control valve 181 and the lubricating control valve 281 to close, and the self-lubrication before the start-up of the diagonal flow pump turbine and the automatic exhaust during the start-up process are completed to ensure the normal and stable operation of the diagonal flow pump turbine.

[0090] Preferably, the air outlet control valve 181, the lubrication control valve 281, the first liquid outlet control valve 2461 and the second liquid outlet control valve 261 are all solenoid valves. During the opening and operation of the diagonal flow pump-turbine, the opening and closing of the air outlet control valve 181, the lubrication control valve 281, the first liquid outlet control valve 2461 and the second liquid outlet control valve 261 are automatically controlled by an external control system.

[0091] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A diagonal flow pump turbine, characterized in that: include: A pump housing (11), comprising a casing (111) and a top plate (112) arranged at the top of the casing (111), wherein the top plate (112) and the casing (111) are arranged to form a pump chamber, a first liquid inlet and outlet (100) is arranged at the bottom end of the casing (111), and a second liquid inlet and outlet (200) is arranged on the upper side wall; A gear box (12) disposed above the pump housing (11); A generator motor (13), which is arranged above the pump housing (11) and is transmission-connected to the gear box (12); a rotor protection tube assembly (14) fixedly disposed in the pump chamber, the top end of which is sealedly connected to the top plate (112), the bottom end of which is provided with a liquid inlet (141), a liquid outlet channel being formed between the rotor protection tube assembly (14) and the pump housing (11), the upper portion of the liquid outlet channel being in communication with the second liquid inlet and outlet (200); A rotor assembly (15), the top end of which is drivingly connected to the gear box (12); the rotor assembly (15) extends along the height direction of the pump housing (11) and passes through the top plate (112) to extend into the pump cavity; the rotor protection tube assembly (14) is sleeved on the upper part of the rotor assembly (15); An impeller (16) fixedly disposed at the lower portion of the rotor assembly (15); a sealing assembly (17) which is sleeved on the rotor assembly (15) and is sealedly connected to the rotor assembly (15); the bottom end of the sealing assembly (17) is sealedly connected to the top plate (112); An air outlet pipe (18) has one end in communication with the top of the inner cavity of the rotor protection tube assembly (14) and the other end extending to the outside of the pump housing (11). An air outlet control valve (181) is provided on the air outlet pipe (18).

2. The diagonal flow pump turbine according to claim 1, characterized in that: The invention also comprises a first sliding guide bearing assembly (19), wherein the first sliding guide bearing assembly (19) is fixedly arranged on the top plate (112), the top end of the rotor assembly (15) is arranged in the first sliding guide bearing assembly (19), the first sliding guide bearing assembly (19), the sealing assembly (17) and the rotor assembly (15) are arranged to form a lubrication pressure relief chamber (400), the first sliding guide bearing assembly (19) is provided with a first flow hole, the first flow hole connects the lubrication pressure relief chamber (400) and the inner chamber of the rotor protection tube assembly (14), and the air outlet pipe (18) is connected to the lubrication pressure relief chamber (400).

3. The diagonal flow pump turbine according to claim 2, characterized in that: Also includes: A mounting bracket (20) is arranged above the pump casing (11), the gear box (12) and the generator motor (13) are both arranged on the mounting bracket (20), and the mounting bracket (20) is connected to a first mounting foundation (300) of the water pump turbine; A thrust bearing assembly (21) is arranged on the mounting bracket (20), and the rotor assembly (15) is rotatably connected to the mounting bracket (20) via the thrust bearing assembly (21).

4. The diagonal flow pump turbine according to claim 3, characterized in that: Also includes: An extended bearing box (23), the top end of which is fixedly connected to the bottom end of the mounting bracket (20), and the thrust bearing assembly (21) is arranged above the extended bearing box (23); The bearing assembly (22) is arranged at the bottom end of the elongated bearing box (23), and the rotor assembly (15) is rotatably connected to the elongated bearing box (23) through the bearing assembly (22).

5. The diagonal flow pump turbine according to claim 4, characterized in that: It also includes a cooling lubrication pipeline (24), wherein the cooling lubrication pipeline (24) includes: A first connecting pipe (241), wherein a cooling chamber (600) is provided in the extended bearing box (23), a first end of the first connecting pipe (241) is connected to the lubrication pressure relief chamber (400), and a second end of the first connecting pipe (241) is connected to the cooling chamber (600); A second connecting pipe (242), wherein a lubrication chamber (500) is provided in the thrust bearing assembly (21), a first end of the second connecting pipe (242) is connected to the cooling chamber (600), and a second end of the second connecting pipe (242) is connected to the lubrication chamber (500); A third connecting pipe (243), wherein a cooling channel is provided in the gear box (12), a first end of the third connecting pipe (243) is connected to the lubrication cavity (500), and a second end of the third connecting pipe (243) is connected to the cooling channel; A fourth connecting pipe (244) has a first end connected to the cooling channel and a second end connected to the air outlet pipe (18).

6. The diagonal flow pump turbine according to claim 5, characterized in that: The cooling and lubricating pipeline (24) further comprises: a fifth connecting pipe (245), a first end of which is connected to the second end of the fourth connecting pipe (244); A sixth connecting pipe (246) has a first end connected to the second end of the fifth connecting pipe (245), and a second end connected to the installation tank of the diagonal flow pump turbine. The sixth connecting pipe (246) is provided with a first liquid outlet control valve (2461).

7. The diagonal flow pump turbine according to claim 6, characterized in that: It also includes a suction bell pipe (25), the suction bell pipe (25) being arranged at the bottom end of the pump housing (11), the top end of the suction bell pipe (25) being connected to the first liquid inlet and outlet (100), and the suction bell pipe (25) being provided with a jet hole (251) connecting the inner and outer sides of the suction bell pipe (25) and inclined toward the first liquid inlet and outlet (100); An anti-cavitation liquid outlet pipe (26) has a first end connected to the second end of the fifth connecting pipe (245), and a second end connected to an end of the jet hole (251) extending to the outer wall of the suction bell pipe (25). A second liquid outlet control valve (261) is provided on the anti-cavitation liquid outlet pipe (26).

8. The diagonal flow pump turbine according to claim 7, characterized in that: A plurality of the jet holes (251) are provided, and the plurality of the jet holes (251) are arranged at intervals along the circumference of the suction bell tube (25). An annular liquid collecting chamber (252) is provided on the outer side of the suction bell tube (25) and surrounds the suction bell tube (25) along the circumference of the suction bell tube (25). One end of the jet holes (251) extending to the outer wall of the suction bell tube (25) is connected to the annular liquid collecting chamber (252), and the second end of the anti-cavitation liquid outlet pipe (26) is connected to the annular liquid collecting chamber (252).

9. The diagonal flow pump turbine according to any one of claims 1 to 8, characterized in that: The pump further comprises a flow guide pipe (27), the flow guide pipe (27) being arranged at the lower part of the pump chamber and sleeved on the rotor assembly (15), a flow guide channel being arranged in the flow guide pipe (27), the impeller (16) being arranged between the flow guide pipe (27) and the rotor assembly (15), and the liquid inlet (141) being in communication with the flow guide channel.

10. The diagonal flow pump turbine according to any one of claims 1 to 8, characterized in that: A plurality of impellers (16) are provided, and the plurality of impellers (16) are arranged at intervals along the extension direction of the rotor assembly (15).

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