Vertical diagonal flow pump with exhaust function

Abstract

The utility model relates to the technical field of vertical diagonal flow pumps, and discloses a vertical diagonal flow pump with an exhaust function, which comprises a pump shell, a motor, a rotor protection pipe assembly, a rotor assembly, an impeller, a sealing assembly and an air outlet pipe. The pump shell comprises a pile casing and a top plate arranged at the top end of the pile casing, a pump cavity is defined by the top plate and the pile casing, a first liquid inlet is formed in the bottom end of the pile casing, and a liquid outlet is formed in the side wall of the upper portion. And the motor is arranged above the pump shell. The rotor protection pipe assembly is fixedly arranged in the pump cavity, the top end of the rotor protection pipe assembly is connected with the top plate in a sealed mode, a second liquid inlet is formed in the bottom end of the rotor protection pipe assembly, a liquid outlet runner is defined by the rotor protection pipe assembly and the pump shell, and the upper portion of the liquid outlet runner communicates with the liquid outlet. 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. 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 vertical diagonal flow pumps, in particular to a vertical diagonal flow pump with an exhaust function. Background Art

[0002] At present, the existing vertical diagonal flow pump has a large amount of air in the internal cavity of the rotor guard tube assembly (a tubular structure covering the upper part of the rotor assembly) before the pump is started. When the pump is started, as the pumped liquid continues to rise, the liquid continuously compresses the air in the cavity of the rotor guard tube assembly, causing the air in the rotor guard tube assembly to gather at the sealing assembly on the upper part of the pump. The air prevents the liquid pumped by the pump from contacting the sealing assembly (a component used to seal the gap between the rotor assembly and the pump body) and entering the sealing assembly for lubrication, causing the sealing assembly to be exposed to the air inside the rotor guard tube assembly. During the operation of the diagonal flow pump, the sealing assembly will experience dry friction, heat, lock or wear, and in severe cases, the upper shaft of the pump will be severely bent, deformed or broken. At the same time, since the accumulated air cannot be discharged, as the pressure of the liquid pumped by the pump 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 pump, seriously reducing the operating stability, reliability and safety of the pump, shortening the operation and service life of the pump, and increasing the operation, inspection and maintenance costs of the pump.

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

[0004] The utility model aims to provide a vertical diagonal flow pump with an exhaust function, 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 vertical diagonal flow pump is turned on.

[0005] In order to achieve the above object, the utility model provides a vertical diagonal flow pump with exhaust function, 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] An electric motor is disposed above the pump housing;

[0008] A rotor protection tube assembly is fixedly disposed in the pump chamber, the top end of the rotor protection tube assembly is sealedly connected to the top plate, the bottom end is provided with a second liquid inlet, a liquid outlet channel is formed between the rotor protection tube assembly and the pump housing, and the upper part of the liquid outlet channel is communicated with the liquid outlet;

[0009] A rotor assembly, the top end of which is drivingly connected to the motor, the rotor assembly extends along the height direction of the pump housing and passes through the top plate into the pump cavity, and the rotor protection tube assembly is sleeved on the upper part of the rotor assembly;

[0010] an impeller, which is fixedly arranged at the lower part of the rotor assembly, and is used to drive the liquid entering the pump chamber through the first liquid inlet upward into the liquid outlet channel;

[0011] 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;

[0012] 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.

[0013] As an improvement of the above technical solution, the sealing assembly includes:

[0014] A sealing seat, which is sleeved on the rotor assembly and has a bottom end connected to the top plate;

[0015] A sealing ring, which is sleeved on the rotor assembly and sandwiched between the sealing seat and the rotor assembly;

[0016] The sealing sleeve is sleeved on the rotor assembly and sandwiched between the sealing ring and the rotor assembly.

[0017] 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 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 first lubrication cavity, the first sliding guide bearing assembly is provided with a first flow hole, the first flow hole connects the first lubrication cavity and the inner cavity of the rotor protection tube assembly, and the air outlet pipe is connected to the first lubrication cavity.

[0018] As an improvement of the above technical solution, it also includes a motor bracket, which is arranged at the top of the pump housing, and the electric motor is arranged at the top of the motor bracket.

[0019] As an improvement of the above technical solution, it also includes a thrust bearing assembly, and the top end of the rotor assembly is rotatably disposed on the motor bracket through the thrust bearing assembly.

[0020] As an improvement of the above technical solution, it also includes a cooling pipe, a second lubrication chamber is arranged in the thrust bearing assembly, one end of the cooling pipe is connected to the first lubrication chamber, and the other end is connected to the second lubrication chamber, the air outlet pipe is connected to the second lubrication chamber, and is connected to the first lubrication chamber through the second lubrication chamber and the cooling pipe.

[0021] As an improvement of the above technical solution, it also includes a second sliding guide bearing assembly arranged in the pump cavity, and the second sliding guide bearing assembly includes:

[0022] A second sleeve, which is sleeved on the rotor assembly;

[0023] A second sliding guide bearing, which is sleeved on the second shaft sleeve;

[0024] a second guide bearing seat, wherein the second sliding guide bearing is mounted in the second guide bearing seat;

[0025] The second guide bearing support is fixedly arranged on the pump housing, and the second guide bearing seat is installed on the second guide bearing support.

[0026] As an improvement of the above technical solution, the rotor protection tube assembly includes:

[0027] An upper protective pipe, the top end of which is sealed and connected to the top plate;

[0028] A middle protective tube, wherein the second sliding guide bearing assembly is arranged between the top end thereof and the bottom end of the upper protective tube, the top end of the middle protective tube is connected to the bottom end of the upper protective tube through the second guide bearing seat, the second sliding guide bearing is provided with a second flow hole, and the inner cavity of the middle protective tube is connected with the inner cavity of the upper protective tube through the second flow hole;

[0029] The lower protective tube has the second sliding guide bearing assembly arranged between its top end and the bottom end of the middle protective tube. The top end of the lower protective tube is connected to the bottom end of the middle protective tube through the second guide bearing seat. The inner cavity of the lower protective tube is connected to the inner cavity of the middle protective tube through the second flow hole. The second liquid inlet is arranged at the bottom end of the lower protective tube.

[0030] 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 second liquid inlet is connected to the guide channel.

[0031] 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.

[0032] Compared with the prior art, the utility model has the following beneficial effects:

[0033] The utility model discloses a vertical diagonal flow pump with an exhaust function. The vertical diagonal flow pump with an exhaust function provided by the present embodiment is provided with an exhaust pipe connecting the top of the rotor protective tube assembly and the outside of the pump casing, and an exhaust control valve is provided on the exhaust pipe, so that when the vertical diagonal flow pump with an exhaust function is started, the exhaust control valve on the exhaust pipe can be opened, and the liquid driven by the impeller enters the rotor protective tube assembly through the second liquid inlet. As the liquid continues to rise in the rotor protective tube assembly, the air in the rotor protective tube assembly can be discharged to the outside of the pump casing through the exhaust pipe, thereby solving the problem that the air in the rotor protective tube assembly is gathered at the top of the rotor protective tube assembly and cannot be discharged when the vertical diagonal flow pump is started, and further solving the problem that the continuous dry friction wear at the sealing assembly is easy to cause damage to the sealing assembly and nearby components. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a cross-sectional view of a vertical diagonal flow pump with exhaust function provided by an embodiment of the utility model;

[0035] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0036] Figure 3 yes Figure 1 The enlarged view of point B in the middle;

[0037] Figure 4 yes Figure 1 Enlarged view of point C in the middle.

[0038] In the figure:

[0039] 11. Pump casing; 111. Casing; 112. Top plate;

[0040] 12. Electric motor;

[0041] 13. Rotor protection tube assembly;

[0042] 131, upper protective tube; 132, middle protective tube; 133, lower protective tube;

[0043] 14. Rotor assembly;

[0044] 15. Impeller;

[0045] 16. Sealing components;

[0046] 161, sealing seat; 162, sealing ring; 163, sealing sleeve;

[0047] 17. A first sliding guide bearing assembly;

[0048] 18. Lubrication inlet pipe; 181. Lubrication control valve; 182. Pressure sensor;

[0049] 19. Motor bracket;

[0050] 20. A second sliding guide bearing assembly;

[0051] 21. air outlet pipe; 211. air outlet control valve;

[0052] 22. Thrust bearing assembly;

[0053] 23. Cooling pipe;

[0054] 24, flow guide pipe; 241, first flow guide pipe section; 242, second flow guide pipe section;

[0055] 100, first liquid inlet; 200, liquid outlet; 300, liquid outlet channel; 400, first lubrication chamber; 500, second lubrication chamber; 600, first impeller balance chamber; 700, rotor balance chamber; 800, second impeller balance chamber. DETAILED DESCRIPTION

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] like Figure 1-4 As shown, this embodiment provides a vertical diagonal flow pump with exhaust function, including a pump housing 11, a motor 12, a rotor protection tube assembly 13, a rotor assembly 14, an impeller 15, a sealing assembly 16 and an air outlet pipe 21. The pump housing 11 includes 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 surrounded to form a pump cavity. The bottom end of the casing 111 is provided with a first liquid inlet 100, and the upper side wall is provided with a liquid outlet 200. The motor 12 is arranged above the pump housing 11. The rotor protection tube assembly 13 is fixedly arranged in the pump cavity, the top end of the rotor protection tube assembly 13 is sealed and connected to the top plate 112, and the bottom end is provided with a second liquid inlet. A liquid outlet channel 300 is formed between the rotor protection tube assembly 13 and the pump housing 11, and the upper part of the liquid outlet channel 300 is connected with the liquid outlet 200. The top of the rotor assembly 14 is transmission-connected to the motor 12. The rotor assembly 14 extends along the height direction of the pump housing 11 and extends into the pump cavity through the top plate 112. The rotor protection tube assembly 13 is sleeved on the upper part of the rotor assembly 14. The impeller 15 is fixedly arranged at the lower part of the rotor assembly 14. The impeller 15 is used to drive the liquid entering the pump cavity through the first liquid inlet 100 to enter the liquid outlet channel 300 upward. The sealing assembly 16 is sleeved on the rotor assembly 14 and is sealed with the rotor assembly 14. The bottom end of the sealing assembly 16 is sealed with the top plate 112. One end of the air outlet pipe 21 is connected to the top of the inner cavity of the rotor protection tube assembly 13, and the other end extends to the outside of the pump housing 11. The air outlet control valve 211 is arranged on the air outlet pipe 21.

[0061] The vertical diagonal flow pump with exhaust function provided in the present embodiment is provided with an air outlet pipe 21 connecting the top of the rotor protective tube assembly 13 and the outside of the pump casing 11, and an air outlet control valve 211 is provided on the air outlet pipe 21, so that when the vertical diagonal flow pump with exhaust function is started, the air outlet control valve 211 on the air outlet pipe 21 can be opened, and the liquid driven by the impeller 15 enters the rotor protective tube assembly 13 through the second liquid inlet. As the liquid continues to rise in the rotor protective tube assembly 13, the air in the rotor protective tube assembly 13 can be discharged to the outside of the pump casing 11 through the air outlet pipe 21, thereby solving the problem that the air in the rotor protective tube assembly 13 is gathered at the top of the rotor protective tube assembly 13 and cannot be discharged when the vertical diagonal flow pump is started, and further solving the problem that continuous dry friction at the sealing assembly 16 is easy to cause damage to the sealing assembly 16 and nearby components.

[0062] Alternatively, if Figure 1 and Figure 2 As shown, the sealing assembly 16 includes a sealing seat 161, a sealing ring 162 and a sealing sleeve 163. The sealing seat 161 is sleeved on the rotor assembly 14, and the bottom end is connected to the top plate 112. The sealing ring 162 is sleeved on the rotor assembly 14 and is sandwiched between the sealing seat 161 and the rotor assembly 14. The sealing sleeve 163 is sleeved on the rotor assembly 14 and is sandwiched between the sealing ring 162 and the rotor assembly 14. The sealing seat 161, the sealing ring 162 and the sealing sleeve 163 cooperate to achieve a waterproof seal of the gap between the upper part of the rotor assembly 14 and the top plate 112.

[0063] Alternatively, if Figure 1 and Figure 2 As shown, the vertical diagonal flow pump with exhaust function provided in this embodiment also includes a first sliding guide bearing assembly 17, the first sliding guide bearing assembly 17 is fixedly arranged on the top plate 112, the top end of the rotor assembly 14 is arranged in the first sliding guide bearing assembly 17, the first sliding guide bearing assembly 17, the sealing assembly 16 and the rotor assembly 14 are surrounded to form a first lubrication cavity 400, and the first sliding guide bearing assembly 17 is provided with a first flow hole, the first flow hole connects the first lubrication cavity 400 and the inner cavity of the rotor protection tube assembly 13, and the air outlet pipe 21 is connected to the first lubrication cavity 400. By providing the first flow hole, the liquid driven by the impeller 15 can enter the first lubrication cavity 400 through the first flow hole, which plays a role in lubricating and cooling the first sliding guide bearing assembly 17 and the sealing assembly 16.

[0064] Alternatively, if Figure 1 As shown, the vertical diagonal flow pump with exhaust function provided in this embodiment further includes a motor bracket 19 , which is disposed at the top of the pump housing 11 , and the motor 12 is disposed at the top of the motor bracket 19 .

[0065] Alternatively, if Figure 1 and Figure 2 As shown, the vertical diagonal flow pump with exhaust function provided in this embodiment further includes a thrust bearing assembly 22 , and the top end of the rotor assembly 14 is rotatably disposed on the motor bracket 19 through the thrust bearing assembly 22 .

[0066] Alternatively, if Figure 1 and Figure 2As shown, the vertical diagonal flow pump with exhaust function provided in this embodiment further includes a cooling pipe 23, a second lubrication chamber 500 is arranged in the thrust bearing assembly 22, one end of the cooling pipe 23 is in communication with the first lubrication chamber 400, and the other end is in communication with the second lubrication chamber 500, the air outlet pipe 21 is in communication with the second lubrication chamber 500, and is in communication with the first lubrication chamber 400 through the second lubrication chamber 500 and the cooling pipe 23. The first lubrication chamber 400 and the second lubrication chamber 500 are in communication through the cooling pipe 23, and the air outlet pipe 21 is in communication with the second lubrication chamber 500, so that the liquid driven by the impeller 15 can enter the second lubrication chamber 500 to lubricate and cool the thrust bearing assembly 22.

[0067] 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 20 arranged in the pump chamber, and the second sliding guide bearing assembly 20 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 14. 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 on the pump housing 11, and the second guide bearing seat is installed on the guide bearing support. The second sliding guide bearing assembly 20 realizes the rotational connection between the upper part of the rotor assembly 14 and the casing 111, so that the rotor assembly 14 can rotate stably.

[0068] Alternatively, if Figure 1 As shown, the rotor protection tube assembly 13 includes an upper protection tube 131, a middle protection tube 132 and a lower protection tube 133. The top of the upper protection tube 131 is sealed and connected to the top plate 112. A second sliding guide bearing assembly 20 is arranged between the top of the middle protection tube 132 and the bottom of the upper protection tube 131. The top of the middle protection tube 132 is connected to the bottom of the upper protection tube 131 through a second guide bearing seat. A second flow hole is arranged on the second sliding guide bearing. The inner cavity of the middle protection tube 132 is connected to the inner cavity of the upper protection tube 131 through the second flow hole. A second sliding guide bearing assembly 20 is arranged between the top of the lower protection tube 133 and the bottom of the middle protection tube 132. The top of the lower protection tube 133 is connected to the bottom of the middle protection tube 132 through a second guide bearing seat. The inner cavity of the lower protection tube 133 is connected to the inner cavity of the middle protection tube 132 through the second flow hole. The second liquid inlet is arranged at the bottom of the lower protection tube 133. The liquid pumped by the impeller 15 can enter the inner cavity of the rotor protection tube assembly 13 through the second liquid inlet.

[0069] Furthermore, if Figure 1-3 As shown, the vertical diagonal flow pump with exhaust function provided in this embodiment also includes a guide pipe 24, which is arranged at the lower part of the pump chamber and is sleeved on the rotor assembly 14. A guide channel is arranged in the guide pipe 24, and the impeller 15 is arranged between the guide pipe 24 and the rotor assembly 14. The second liquid inlet is connected to the guide channel.

[0070] Alternatively, if Figure 1 As shown, a plurality of impellers 15 are provided, and the plurality of impellers 15 are arranged at intervals along the extension direction of the rotor assembly 14. The plurality of impellers 15 connected in series can effectively improve the head of the vertical diagonal flow pump with exhaust function.

[0071] Alternatively, if Figure 1 As shown, the guide pipe 24 includes a plurality of guide pipe sections, and the impeller 15 is arranged in one-to-one correspondence with the guide pipe sections. The impeller 15 is arranged below the corresponding guide pipe section, and the plurality of guide pipe sections include a second guide pipe section 242 and a plurality of first guide pipe sections 241. The first guide pipe section 241 and the corresponding impeller 15 are surrounded to form a first impeller balancing cavity 600, and an impeller balancing hole is arranged on the impeller 15. The first impeller balancing cavity 600 is communicated with the guide channel through the impeller balancing hole on the corresponding impeller 15. The second guide pipe section 242 and the rotor assembly 14 are arranged to form a rotor balancing chamber 700, the bottom end of the rotor protection tube assembly 13 is connected to the rotor balancing chamber 700, the second guide pipe section 242 and the corresponding impeller 15 are arranged to form a second impeller balancing chamber 800, the second impeller balancing chamber 800 is located below the rotor balancing chamber 700, a third flow hole is provided on the second guide pipe section 242, the second impeller balancing chamber 800 is connected to the rotor balancing chamber 700 via the third flow hole, and the second impeller balancing chamber 800 is connected to the guide channel via the impeller balancing hole on the corresponding impeller 15. When the vertical diagonal flow pump with exhaust function is turned on, the liquid pumped by the impeller 15 can enter the first impeller balance chamber 600 through the gap between the impeller 15 and the first guide pipe section 241, and then be ejected through the impeller balance hole to balance the axial force on the impeller 15 corresponding to the first guide pipe section 241. Similarly, the liquid pumped by the impeller 15 can enter the second impeller balance chamber 800 through the gap between the impeller 15 and the second guide pipe section 242, and then be ejected through the impeller balance hole to balance the axial force on the impeller 15 corresponding to the second guide pipe section 242. A part of the liquid entering the second impeller balance chamber 800 can enter the rotor balance chamber 700 through the third flow hole, and then enter the inner cavity of the rotor protective tube assembly 13 through the second liquid inlet, and enter the first lubrication chamber 400 through the second flow hole and the first flow hole in turn, and then enter the second lubrication chamber 500 through the cooling pipe 23.

[0072] Alternatively, if Figure 1 and Figure 2As shown, the vertical diagonal flow pump with exhaust function provided in this embodiment further includes a lubricating inlet pipe 18, one end of which is exposed outside the pump housing 11 for connecting the lubricating liquid supply device, and the other end is communicated with the first lubricating chamber 400. The lubricating inlet pipe 18 is provided with a lubricating control valve 181. Before the vertical diagonal flow pump with exhaust function is started, the external lubricating liquid supply device can supply lubricating liquid to the first lubricating chamber 400 through the lubricating inlet pipe 18, thereby realizing pre-lubrication of the first sliding guide bearing assembly 17 and the sealing assembly 16, and the lubricating oil entering the first lubricating chamber 400 can enter the inner cavity of the rotor guard tube assembly 13 through the first flow hole, thereby pre-lubricating various components in the rotor guard tube assembly 13. Through the above-mentioned pre-lubricating operation, dry friction can be effectively avoided during the operation of the vertical diagonal flow pump with exhaust function, thereby reducing the failure rate and operating cost of the vertical diagonal flow pump with exhaust function, and improving the service life of the vertical diagonal flow pump with exhaust function.

[0073] Alternatively, if Figure 1 and Figure 2 As shown, a pressure sensor 182, i.e., a pressure probe, is also provided on the lubricating liquid inlet pipe 18. When the pressure sensor 182 detects the pressure of the liquid pumped by the impeller 15 in the lubricating liquid inlet pipe 18, the external control system controls the air outlet control valve 211 and the lubricating control valve 181 to close, and the self-lubrication before starting and the automatic exhaust during the starting process of the vertical diagonal flow pump with exhaust function are completed, so as to ensure the normal and stable operation of the vertical diagonal flow pump with exhaust function.

[0074] Preferably, both the air outlet control valve 211 and the lubrication control valve 181 are solenoid valves. During the entire opening process of the vertical diagonal flow pump with exhaust function, the opening and closing of the air outlet control valve 211 and the lubrication control valve 181 are automatically controlled by an external control system, thereby realizing automatic self-lubrication and automatic exhaust of the vertical diagonal flow pump with exhaust function.

[0075] 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 vertical diagonal flow pump with exhaust function, characterized in that: include: A pump casing (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 (100) is arranged at the bottom end of the casing (111), and a liquid outlet (200) is arranged on the upper side wall; An electric motor (12) is arranged above the pump housing (11); a rotor protection tube assembly (13) fixedly disposed in the pump chamber, the top end of the rotor protection tube assembly (13) being sealedly connected to the top plate (112), the bottom end being provided with a second liquid inlet, a liquid outlet channel (300) being formed between the rotor protection tube assembly (13) and the pump housing (11), the upper portion of the liquid outlet channel (300) being in communication with the liquid outlet (200); A rotor assembly (14), the top end of which is drivingly connected to the motor (12); the rotor assembly (14) extends along the height direction of the pump housing (11) and passes through the top plate (112) and extends into the pump cavity; the rotor protection tube assembly (13) is sleeved on the upper part of the rotor assembly (14); an impeller (15) fixedly disposed at the lower part of the rotor assembly (14), the impeller (15) being used to drive the liquid entering the pump chamber through the first liquid inlet (100) upward into the liquid outlet channel (300); a sealing assembly (16) which is sleeved on the rotor assembly (14) and is sealedly connected to the rotor assembly (14); a bottom end of the sealing assembly (16) is sealedly connected to the top plate (112); An air outlet pipe (21) has one end in communication with the top of the inner cavity of the rotor protection tube assembly (13), and the other end extending to the outside of the pump housing (11). An air outlet control valve (211) is provided on the air outlet pipe (21).

2. The vertical diagonal flow pump with exhaust function according to claim 1, characterized in that: The sealing assembly (16) comprises: A sealing seat (161) is sleeved on the rotor assembly (14), and the bottom end of the sealing seat is connected to the top plate (112); A sealing ring (162) sleeved on the rotor assembly (14) and sandwiched between the sealing seat (161) and the rotor assembly (14); The sealing sleeve (163) is sleeved on the rotor assembly (14) and is sandwiched between the sealing ring (162) and the rotor assembly (14).

3. The vertical diagonal flow pump with exhaust function according to claim 1, characterized in that: The invention also comprises a first sliding guide bearing assembly (17), wherein the first sliding guide bearing assembly (17) is fixedly arranged on the top plate (112), the top end of the rotor assembly (14) is arranged in the first sliding guide bearing assembly (17), the first sliding guide bearing assembly (17), the sealing assembly (16) and the rotor assembly (14) are arranged to form a first lubrication cavity (400), the first sliding guide bearing assembly (17) is provided with a first flow hole, the first flow hole connects the first lubrication cavity (400) and the inner cavity of the rotor protection tube assembly (13), and the air outlet pipe (21) is connected to the first lubrication cavity (400).

4. The vertical diagonal flow pump with exhaust function according to claim 3, characterized in that: It also includes a motor bracket (19), wherein the motor bracket (19) is arranged at the top end of the pump housing (11), and the electric motor (12) is arranged at the top end of the motor bracket (19).

5. The vertical diagonal flow pump with exhaust function according to claim 4, characterized in that: It also includes a thrust bearing assembly (22), and the top end of the rotor assembly (14) is rotatably disposed on the motor bracket (19) through the thrust bearing assembly (22).

6. The vertical diagonal flow pump with exhaust function according to claim 5, characterized in that: The thrust bearing assembly (22) further comprises a cooling pipe (23), a second lubrication chamber (500) being arranged in the cooling pipe (23), one end of the cooling pipe (23) being in communication with the first lubrication chamber (400), and the other end of the cooling pipe (23) being in communication with the second lubrication chamber (500), the air outlet pipe (21) being in communication with the second lubrication chamber (500), and being in communication with the first lubrication chamber (400) via the second lubrication chamber (500) and the cooling pipe (23).

7. The vertical diagonal flow pump with exhaust function according to claim 1, characterized in that: The pump also includes a second sliding guide bearing assembly (20) disposed in the pump cavity, wherein the second sliding guide bearing assembly (20) includes: A second shaft sleeve, which is sleeved on the rotor assembly (14); A second sliding guide bearing, which is sleeved on the second shaft sleeve; a second guide bearing seat, wherein the second sliding guide bearing is mounted in the second guide bearing seat; The second guide bearing support is fixedly arranged on the pump housing (11), and the second guide bearing seat is mounted on the second guide bearing support.

8. The vertical diagonal flow pump with exhaust function according to claim 7, characterized in that: The rotor protection tube assembly (13) comprises: An upper protective tube (131), the top end of which is sealed and connected to the top plate (112); The middle protective tube (132) has the second sliding guide bearing assembly (20) disposed between its top end and the bottom end of the upper protective tube (131); the top end of the middle protective tube (132) is connected to the bottom end of the upper protective tube (131) via the second guide bearing seat; the second sliding guide bearing is provided with a second flow hole; the inner cavity of the middle protective tube (132) is connected to the inner cavity of the upper protective tube (131) via the second flow hole; The lower protective tube (133) has the second sliding guide bearing assembly (20) arranged between its top end and the bottom end of the middle protective tube (132); the top end of the lower protective tube (133) is connected to the bottom end of the middle protective tube (132) via the second guide bearing seat; the inner cavity of the lower protective tube (133) is connected to the inner cavity of the middle protective tube (132) via the second flow hole; and the second liquid inlet is arranged at the bottom end of the lower protective tube (133).

9. The vertical diagonal flow pump with exhaust function according to any one of claims 1 to 8, characterized in that: The pump further comprises a flow guide pipe (24), the flow guide pipe (24) being arranged at the lower part of the pump chamber and sleeved on the rotor assembly (14), a flow guide channel being arranged in the flow guide pipe (24), the impeller (15) being arranged between the flow guide pipe (24) and the rotor assembly (14), and the second liquid inlet being communicated with the flow guide channel.

10. The vertical diagonal flow pump with exhaust function according to any one of claims 1 to 8, characterized in that: A plurality of impellers (15) are provided, and the plurality of impellers (15) are arranged at intervals along the extension direction of the rotor assembly (14).

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