A vertical diagonal flow pump with pre-lubrication function

Abstract

The utility model relates to the technical field of vertical diagonal flow pumps, and discloses a vertical diagonal flow pump with a pre-lubrication function, including a pump housing, a motor, a rotor protection tube assembly, a rotor assembly, an impeller, a sealing assembly, a first sliding guide bearing assembly and a lubricating liquid inlet pipe. The motor is arranged above the pump housing. The rotor protection tube assembly is fixedly arranged in the pump cavity, and the top end is sealed and connected to the top plate. The rotor protection tube assembly is sleeved on the upper part of the rotor assembly. The impeller is fixedly arranged on the lower part of the rotor assembly. The sealing assembly is sleeved on the rotor assembly and is sealed and connected to the rotor assembly, and the bottom end of the sealing assembly is sealed and connected to the top plate. The first sliding guide bearing assembly is fixedly arranged on the top plate, and 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 first lubrication cavity. One end of the lubrication liquid inlet pipe is exposed from the pump housing for connecting to a lubricating liquid supply device, and the other end is communicated with the first lubrication cavity.

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 a pre-lubrication function. Background Art

[0002] The existing vertical diagonal flow pumps are very long under specific application conditions, and some are as long as tens of meters. When the liquid level of the pumped medium drops to a low level, due to the large length of the pump, the medium does not submerge the pump to a depth that makes it impossible to completely submerge all the sliding guide bearings and sealing components in the pump casing of the diagonal flow pump and expose them to the air inside the rotor component. During the startup of the diagonal flow pump, dry friction will occur in the bearings and the sealing components, causing the bearings to wear or heat up and lock due to dry friction, thereby increasing the sliding fit clearance, and the sealing components will also suffer from dry friction, heat up, lock or wear, causing the pump to vibrate or fail to operate. In severe cases, the shaft or rotor component of the pump will be severely bent and deformed, making it impossible to repair and use the pump, which seriously reduces the operational stability, reliability and safety of the pump, shortens the operation and service life of the pump, and increases the operation, overhaul and maintenance costs of the pump.

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

[0004] The utility model aims to provide a vertical diagonal flow pump with a pre-lubrication function, which can pre-lubricate a first sliding guide bearing assembly and a sealing assembly before starting.

[0005] In order to achieve the above object, the utility model provides a vertical diagonal flow pump with a pre-lubrication 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 chamber, a 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, and the top end is sealed and connected to the top plate, a liquid outlet flow channel is formed between the rotor protection tube assembly and the pump housing, and the upper part of the liquid outlet flow 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 liquid inlet upward into the liquid outlet flow channel;

[0011] A sealing assembly, which is sleeved on the rotor assembly and is sealed to the rotor assembly, and the bottom end of the sealing assembly is sealed to the top plate;

[0012] A first sliding guide bearing assembly, which 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, and the first flow hole communicates the first lubrication cavity with the inner cavity of the rotor protection tube assembly;

[0013] A lubrication inlet pipe has one end exposed outside the pump housing and used for connecting to a lubrication supply device, and the other end communicates with the first lubrication cavity. A lubrication control valve is provided on the lubrication inlet pipe.

[0014] As an improvement of the above technical solution, the sealing assembly includes:

[0015] A sealing seat, which is sleeved on the rotor assembly and has a bottom end connected to the top plate;

[0016] A sealing ring, which is sleeved on the rotor assembly and sandwiched between the sealing seat and the rotor assembly;

[0017] The sealing sleeve is sleeved on the rotor assembly and sandwiched between the sealing ring and the rotor assembly.

[0018] As an improvement of the above technical solution, the first sliding guide bearing assembly includes:

[0019] A first sleeve, which is sleeved on the rotor assembly;

[0020] A first sliding guide bearing, which is sleeved on the first shaft sleeve;

[0021] The first guide bearing seat is sleeved on the first sliding guide bearing and fixedly connected to the top plate.

[0022] 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.

[0023] 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:

[0024] A second sleeve, which is sleeved on the rotor assembly;

[0025] A second sliding guide bearing, which is sleeved on the second shaft sleeve;

[0026] a second guide bearing seat, wherein the second sliding guide bearing is mounted in the second guide bearing seat;

[0027] The second guide bearing support is fixedly arranged in the pump housing, and the second guide bearing seat is installed on the second guide bearing support.

[0028] As an improvement of the above technical solution, the rotor protection tube assembly includes:

[0029] An upper protective pipe, the top end of which is sealed and connected to the top plate;

[0030] 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;

[0031] 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 middle protective tube is connected to the inner cavity of the upper protective tube through the first flow hole.

[0032] 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.

[0033] 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 sleeved on the rotor assembly. A guide channel is arranged in the guide pipe, and the impeller is arranged between the guide pipe and the rotor assembly.

[0034] 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.

[0035] As an improvement of the above technical solution, it also includes a pump mounting plate, which is fixedly arranged on the outer side of the pump housing.

[0036] Compared with the prior art, the utility model has the following beneficial effects:

[0037] The utility model provides a vertical diagonal flow pump with a pre-lubrication function. Before starting, an external lubricating liquid supply device can supply lubricating liquid to the first lubricating cavity through a lubricating liquid inlet pipe, thereby realizing pre-lubrication of the first sliding guide bearing assembly and the sealing assembly, and the lubricating liquid entering the first lubricating cavity can enter the inner cavity of the rotor protection tube assembly through the first flow hole, thereby pre-lubricating various components in the rotor protection tube assembly. Through the above-mentioned pre-lubrication operation, dry friction of the vertical diagonal flow pump during operation can be effectively avoided, thereby reducing the failure rate and operation cost of the vertical diagonal flow pump and increasing the service life of the vertical diagonal flow pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a cross-sectional view of a vertical diagonal flow pump with a pre-lubrication function provided by an embodiment of the utility model;

[0039] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0040] Figure 3 yes Figure 1 The enlarged view of point B in the middle;

[0041] Figure 4 yes Figure 1 Enlarged view of point C in the middle.

[0042] In the figure:

[0043] 11. Pump casing; 111. Casing; 112. Top plate;

[0044] 12. Electric motor;

[0045] 13. Rotor protection tube assembly;

[0046] 131, upper protective tube; 132, middle protective tube; 133, lower protective tube;

[0047] 14. Rotor assembly;

[0048] 15. Impeller;

[0049] 16. Sealing components;

[0050] 161, sealing seat; 162, sealing ring; 163, sealing sleeve;

[0051] 17. A first sliding guide bearing assembly;

[0052] 171. a first sleeve; 172. a first sliding guide bearing; 173. a first guide bearing seat;

[0053] 18. Lubrication inlet pipe; 181. Lubrication control valve;

[0054] 19. Motor bracket;

[0055] 20. A second sliding guide bearing assembly;

[0056] 21. air outlet pipe; 211. air outlet control valve;

[0057] 22. Thrust bearing assembly;

[0058] 23. Cooling pipe;

[0059] 24, flow guide pipe; 241, first flow guide pipe section; 242, second flow guide pipe section;

[0060] 25. Exhaust valve;

[0061] 100, 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; 900, guide channel. DETAILED DESCRIPTION

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] like Figure 1-4 As shown, this embodiment provides a vertical diagonal flow pump with a pre-lubrication 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, a first sliding guide bearing assembly 17 and a lubricating liquid inlet pipe 18. 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 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, and the top end is sealed and connected to the top plate 112. 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 to the liquid outlet 200. The top of the rotor assembly 14 is connected to the motor 12 in a transmission manner. 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 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. The first sliding guide bearing assembly 17 is fixedly arranged on the top plate 112. The top 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. The first sliding guide bearing assembly 17 is provided with a first flow hole. The first flow hole connects the first lubrication cavity 400 with the inner cavity of the rotor protection tube assembly 13. One end of the lubricating liquid inlet pipe 18 is exposed outside the pump housing 11 for connecting to a lubricating liquid supply device, and the other end is communicated with the first lubricating cavity 400 . A lubricating control valve 181 is provided on the lubricating liquid inlet pipe 18 .

[0067] The vertical diagonal flow pump with pre-lubrication function provided in this embodiment can, before starting, supply lubricating liquid to the first lubricating cavity 400 through the lubricating liquid inlet pipe 18 by an external lubricating liquid supply device, thereby realizing pre-lubrication of the first sliding guide bearing assembly 17 and the sealing assembly 16, and the lubricating liquid entering the first lubricating cavity 400 can enter the inner cavity of the rotor guard tube assembly 13 through the first flow hole, thereby pre-lubricating the various components in the rotor guard tube assembly 13. Through the above-mentioned pre-lubrication operation, dry friction can be effectively avoided during the operation of the vertical diagonal flow pump, thereby reducing the failure rate and operating cost of the vertical diagonal flow pump and increasing the service life of the vertical diagonal flow pump. Before the vertical diagonal flow pump is started, the pre-lubrication process ends.

[0068] 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 sandwiched between the sealing seat 161 and the rotor assembly 14. The sealing sleeve 163 is sleeved on the rotor assembly 14 and sandwiched between the sealing ring 162 and the rotor assembly 14. The sealing assembly 16 is used to achieve sealing between the top of the rotor assembly 14 and the pump housing 11.

[0069] Alternatively, if Figure 1 and Figure 2 As shown, the first sliding guide bearing assembly 17 includes a first sleeve 171, a first sliding guide bearing 172 and a first guide bearing seat 173. The first sleeve 171 is sleeved on the rotor assembly 14. The first sliding guide bearing 172 is sleeved on the first sleeve 171. The first guide bearing seat 173 is sleeved on the first sliding guide bearing 172 and is fixedly connected to the top plate 112. The first sliding guide bearing assembly 17 realizes the rotational connection between the top of the rotor assembly 14 and the pump housing 11.

[0070] Alternatively, if Figure 1 and Figure 2 As shown, the vertical diagonal flow pump with pre-lubrication 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 .

[0071] Alternatively, if Figure 1As shown, the vertical diagonal flow pump with pre-lubrication 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 in the pump housing 11, and the second guide bearing seat is installed on the second guide bearing support. The rotational connection between the upper part of the rotor assembly 14 and the casing 111 is realized by the second sliding guide bearing assembly 20.

[0072] Alternatively, if Figure 1-Figure 3 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 end 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 end of the middle protection tube 132 and the bottom end of the upper protection tube 131. The top end of the middle protection tube 132 is connected to the bottom end 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 end of the lower protection tube 133 and the bottom end of the middle protection tube 132. The top end of the lower protection tube 133 is connected to the bottom end of the middle protection tube 132 through a second guide bearing seat. 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.

[0073] 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 a pre-lubrication function.

[0074] Alternatively, if Figure 1 and Figure 2 As shown, the vertical diagonal flow pump with pre-lubrication function provided in this embodiment also includes an air outlet pipe 21, one end of the air outlet pipe 21 is connected to the top of the inner cavity of the rotor protective tube assembly 13, and the other end extends to the outside of the pump casing 11, and an air outlet control valve 211 is arranged on the air outlet pipe 21.

[0075] Alternatively, if Figure 1 and Figure 2 As shown, the vertical diagonal flow pump with pre-lubrication 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 .

[0076] Alternatively, if Figure 1 and Figure 2As shown, the vertical diagonal flow pump with pre-lubrication function provided in this embodiment also 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 connected to the first lubrication chamber 400, and the other end is connected to the second lubrication chamber 500, the air outlet pipe 21 is connected to the second lubrication chamber 500, and is connected to the first lubrication chamber 400 through the second lubrication chamber 500 and the cooling pipe 23.

[0077] Alternatively, if Figure 1 As shown, the vertical diagonal flow pump with pre-lubrication 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 900 is arranged in the guide pipe 24, and the top of the guide channel 900 is connected to the bottom end of the outlet channel 300. The impeller 15 is arranged between the guide pipe 24 and the rotor assembly 14.

[0078] Furthermore, if Figure 1 , Figure 3 and Figure 4 As shown, the flow guide pipe 24 includes a first flow guide pipe section 241 and a second flow guide pipe section 242. The first flow guide pipe section 241 and the impeller 15 located below it are surrounded to form a first impeller balance chamber 600, and the impeller 15 is provided with an impeller balance hole. The first impeller balance chamber 600 is connected to the flow guide channel 900 through the corresponding impeller balance hole. The second flow guide pipe section 242 and the rotor assembly 14 are surrounded to form a rotor balance chamber 700, and the bottom end of the rotor protection tube assembly 13 is connected to the rotor balance chamber 700. The second flow guide pipe 24 and the impeller 15 located below it are surrounded to form a second impeller balance chamber 800, and the second impeller balance chamber 800 is located below the rotor balance chamber 700. The second flow guide pipe section 242 is provided with a third flow hole, and the second impeller balance chamber 800 is connected to the rotor balance chamber 700 through the third flow hole.

[0079] Alternatively, if Figure 1 and Figure 2 As shown, the vertical diagonal flow pump with a pre-lubrication function provided in this embodiment also includes an air outlet valve 25, which is arranged above the top plate 112. An air outlet hole is arranged on the top plate 112. The bottom end of the air outlet hole is connected to the liquid outlet channel 300, and the top end is connected to the air inlet of the air outlet valve 25. When the vertical diagonal flow pump with a pre-lubrication function is started, the air in the liquid outlet channel 300 is discharged through the air outlet valve 25.

[0080] Alternatively, if Figure 1 and Figure 2As 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.

[0081] 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 pre-lubrication 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 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) which is fixedly disposed in the pump chamber and has a top end sealedly connected to the top plate (112); a liquid outlet channel (300) is formed between the rotor protection tube assembly (13) and the pump housing (11); and an upper portion of the liquid outlet channel (300) is 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 portion of the rotor assembly (14), the impeller (15) being used to drive the liquid entering the pump chamber through the liquid inlet (100) upwardly 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); a first sliding guide bearing assembly (17) fixedly arranged on the top plate (112); a 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); a first flow hole is arranged on the first sliding guide bearing assembly (17); the first flow hole communicates with the first lubrication cavity (400) and the inner cavity of the rotor protection tube assembly (13); A lubricating liquid inlet pipe (18) has one end exposed outside the pump housing (11) and used for connecting to a lubricating liquid supply device, and the other end communicates with the first lubricating cavity (400). A lubricating control valve (181) is provided on the lubricating liquid inlet pipe (18).

2. The vertical diagonal flow pump with pre-lubrication 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 pre-lubrication function according to claim 1, characterized in that: The first sliding guide bearing assembly (17) comprises: A first sleeve (171) sleeved on the rotor assembly (14); A first sliding guide bearing (172), which is sleeved on the first shaft sleeve (171); A first guide bearing seat (173) is sleeved on the first sliding guide bearing (172) and fixedly connected to the top plate (112).

4. The vertical diagonal flow pump with pre-lubrication function according to claim 1, 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 pre-lubrication 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; A second guide bearing support is fixedly arranged in the pump housing (11), and the second guide bearing seat is mounted on the second guide bearing support.

6. The vertical diagonal flow pump with pre-lubrication function according to claim 5, 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) disposed 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 middle protective tube (132) is connected to the inner cavity of the upper protective tube (131) via the first flow hole.

7. The vertical diagonal flow pump with pre-lubrication function according to any one of claims 1 to 5, 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).

8. The vertical diagonal flow pump with pre-lubrication function according to any one of claims 1 to 5, characterized in that: The pump also comprises a flow guide pipe (24), which is arranged at the lower part of the pump chamber and sleeved on the rotor assembly (14), a flow guide channel (900) is arranged in the flow guide pipe (24), and the impeller (15) is arranged between the flow guide pipe (24) and the rotor assembly (14).

9. The vertical diagonal flow pump with pre-lubrication 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).

10. The vertical diagonal flow pump with pre-lubrication function according to any one of claims 1 to 5, characterized in that: It also includes a pump mounting plate (26), wherein the pump mounting plate (26) is fixedly arranged on the outside of the pump housing (11).

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