Vertical centrifugal pump

Abstract

The utility model discloses a vertical centrifugal pump, and relates to the technical field of centrifugal pumps. A vertical centrifugal pump comprises a motor support, a bearing oil chamber, a mechanical seal oil chamber, a first pump shell, a second pump shell and a base. On the basis of the base, the second pump shell, the first pump shell, the mechanical sealing oil chamber, the bearing oil chamber and the motor support are sequentially installed above the base, and the first sealing piece, the second sealing piece and the third sealing piece are arranged at the joint of the motor support and the bearing oil chamber, the joint of the bearing oil chamber and the mechanical sealing oil chamber and the interior of the first pump shell respectively. Through the arrangement of the three sealing pieces and the like, the power mechanism can be used as a power mechanism of the high-speed vortex pulping machine and can also independently convey media such as powder slurry of clear water, sewage, cement, coal ash and the like, aggregate slurry of fine sand, soil blocks and the like. The device has the characteristic of large conveying flow, adopts an upper-inlet and lower-outlet structure, does not store materials, can be completely emptied, and does not need to worry about sediment blockage when materials easy to condense are conveyed.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump technology, specifically a vertical centrifugal pump. Background Technology

[0002] A centrifugal pump is a mechanical device that uses centrifugal force to transport liquids. Its main working component is one or more impellers. When the impeller rotates, liquid is drawn in from the center of the impeller and gains energy under the action of the impeller blades, being thrown towards the edge of the impeller, thus generating centrifugal force. This force increases the pressure and velocity of the liquid, which then flows into the diffuser or guide vanes inside the pump casing, converting some of the velocity energy into pressure energy, and is finally transported to the required location.

[0003] Existing centrifugal pumps have a bottom-inlet, top-outlet structure and typically use a single-stage mechanical seal. However, the bottom-inlet, top-outlet structure cannot completely vent the pump, and some material will remain inside the casing. This design is only suitable for a small number of materials that are not prone to sedimentation or condensation. Furthermore, the single-stage mechanical seal has a relatively short service life, and if the seal leaks, the pump must be stopped and replaced immediately. Therefore, in view of the above situation, this utility model proposes a novel solution. Utility Model Content

[0004] The purpose of this invention is to provide a vertical centrifugal pump to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a vertical centrifugal pump, comprising;

[0006] The motor bracket, bearing oil chamber, mechanical seal oil chamber, pump housing one, pump housing two, and base; based on the base, pump housing two, pump housing one, mechanical seal oil chamber, bearing oil chamber, and motor bracket are sequentially installed on top of the base;

[0007] The connection between the motor bracket and the bearing oil chamber, the connection between the bearing oil chamber and the mechanical seal oil chamber, and the inside of the pump casing are respectively provided with seal 1, seal 2 and seal 3;

[0008] The centrifugal pump has a pump shaft with an impeller fixed at one end. The impeller rotates inside the pump casing and the seals 1, 2, and 3 are all connected to the pump shaft.

[0009] Further, the sealing element includes a skeleton oil seal and a bearing. The motor bracket and the bearing oil chamber are connected by a bearing seat. The bearing is installed at the bearing seat and the skeleton oil seal is installed on the side of the bearing seat facing the motor bracket and is attached to the surface of the pump shaft. The skeleton oil seal is used to isolate the motor bracket from the inside of the bearing oil chamber.

[0010] Further, the second seal includes a second bearing and a first mechanical seal. The mechanical seal oil chamber is connected to the bearing oil chamber and the pump housing first via a flange. The second bearing is installed on the side of the mechanical seal oil chamber facing the bearing oil chamber, and the first mechanical seal is installed on the side of the mechanical seal oil chamber facing the pump housing first.

[0011] Further, the pump housing is provided with a mechanical seal cover and a shaft sleeve. The mechanical seal cover is fixed to the side of the mechanical seal oil chamber facing the pump housing and is sleeved on the surface of the pump shaft. A skeleton oil seal is provided between the mechanical seal cover and the shaft sleeve, and the skeleton oil seal is also sleeved on the surface of the pump shaft.

[0012] Furthermore, the pump housing is provided with a pump inlet on one side and a pump outlet on one side. Liquid enters the pump housing from the pump inlet and then passes through the pump housing to be discharged from the pump outlet.

[0013] Furthermore, a mechanical seal two is installed in the middle of the mechanical seal cover, and a skeleton oil seal three is installed at the end of the shaft sleeve away from the mechanical seal cover. Both the mechanical seal two and the skeleton oil seal three are fitted onto the surface of the pump shaft.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This vertical centrifugal pump, with its three seals and other features, can serve as the power unit for a high-speed vortex pulping machine or be used independently to transport media such as clean water, sewage, cement, fly ash, and other powdery slurries, as well as fine sand, soil lumps, and other aggregate slurries. It features a large flow rate, a top-in, bottom-out structure that prevents material buildup and allows for complete venting, eliminating concerns about sedimentation and clogging when transporting easily coagulating materials. The dual-stage mechanical seal structure ensures a long service life and convenient maintenance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is a partially enlarged cross-sectional view of the present invention.

[0019] Figure 4 This is an enlarged cross-sectional view of another part of the present invention.

[0020] In the diagram: 1. Motor bracket; 2. Pump shaft; 3. Oil seal 1; 4. Bearing 1; 5. Bearing housing; 6. Bearing oil chamber; 7. Bearing 2; 8. Mechanical seal 1; 9. Mechanical seal oil chamber; 10. Mechanical seal 2; 11. Mechanical seal gland; 12. Oil seal 2; 13. Shaft sleeve; 14. Oil seal 3; 15. Pump casing 1; 16. Pump casing 2; 17. Impeller; 18. Base; 19. Pump inlet; 20. Pump outlet. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale; for example, the thickness or width of some layers may be exaggerated relative to other layers.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be discussed or described in detail in the description of the subsequent figures.

[0025] like Figure 1 and Figure 2 As shown, this utility model provides a technical solution: a vertical centrifugal pump, comprising;

[0026] Motor bracket 1, bearing oil chamber 6, mechanical seal oil chamber 9, pump housing 15, pump housing 2 16 and base 18; based on base 18, pump housing 2 16, pump housing 15, mechanical seal oil chamber 9, bearing oil chamber 6 and motor bracket 1 are sequentially installed on top of base 18.

[0027] Seals 1, 2 and 3 are respectively provided at the connection between the motor bracket 1 and the bearing oil chamber 6, the connection between the bearing oil chamber 6 and the mechanical seal oil chamber 9, and inside the pump casing 15.

[0028] The centrifugal pump has a pump shaft 2, and an impeller 17 is fixed at one end of the pump shaft 2. The impeller 17 rotates inside the pump casing 2 16, and the first seal, the second seal, and the third seal are all connected to the pump shaft 2.

[0029] like Figure 2 and Figure 3 As shown, further regarding this scheme, the sealing element includes a skeleton oil seal 3 and a bearing 4. The motor bracket 1 and the bearing oil chamber 6 are connected by a bearing seat 5. The bearing 4 is installed in the bearing seat 5, and the skeleton oil seal 3 is installed on the side of the bearing seat 5 facing the motor bracket 1 and is attached to the surface of the pump shaft 2. The skeleton oil seal 3 is used to isolate the motor bracket 1 from the inside of the bearing oil chamber 6. The rubber part of the skeleton oil seal 3 can tightly fit the pump shaft 2, using its own elasticity to form a seal in the axial and radial directions, preventing the intrusion of impurities. At the same time, the bearing 4 is installed in the bearing seat 5, which supports the pump shaft 2, ensuring the stability of the pump shaft 2 during rotation and reducing the vibration of the pump shaft 2, thereby indirectly improving the sealing effect.

[0030] like Figure 3 and Figure 4 As shown, further regarding this scheme, the second seal includes a second bearing 7 and a first mechanical seal 8. The mechanical seal oil chamber 9 is connected to the bearing oil chamber 6 and the pump housing 15 via a flange connection. The second bearing 7 is installed on the side of the mechanical seal oil chamber 9 facing the bearing oil chamber 6, and the first mechanical seal 8 is installed on the side of the mechanical seal oil chamber 9 facing the pump housing 15. The first mechanical seal 8 consists of a rotating ring and a stationary ring. When the pump shaft 2 rotates, the rotating ring rotates with the pump shaft 2, while the stationary ring remains stationary. The rotating and stationary rings fit tightly together, forming a very narrow gap between them, making it difficult for liquid to leak through this gap. This prevents liquid inside the pump housing 15 from entering the bearing oil chamber 6 and the mechanical seal oil chamber 9, and also prevents oil in the oil chambers from leaking into the pump housing 15.

[0031] like Figure 3 and Figure 4As shown, further detailing this scheme, the third seal includes a mechanical seal gland 11 and a bushing 13 disposed within the pump housing 15. The mechanical seal gland 11 is fixed to the side of the mechanical seal oil chamber 9 facing the pump housing 15 and is fitted onto the surface of the pump shaft 2. A skeleton oil seal 12 is disposed between the mechanical seal gland 11 and the bushing 13, and the skeleton oil seal 12 is also fitted onto the surface of the pump shaft 2. The function of the bushing 13 is to protect the pump shaft 2 from direct contact with the medium (liquid) and corrosion, and it can also serve as the mounting base for the seal. The skeleton oil seal 12, disposed between the mechanical seal gland 11 and the bushing 13, further enhances the sealing effect. The mechanical seal 10, the skeleton oil seal 12, and the skeleton oil seal 14 work together to form a complex sealing system. The mechanical seal 10 also adopts a dynamic ring and stationary ring structure to prevent liquid from leaking outward along the pump shaft 2. The skeleton oil seal 14 installed at the end of the bushing 13 away from the mechanical seal gland 11 is used to seal at the end of the pump shaft 2 to ensure good sealing performance of the entire pump.

[0032] like Figure 3 and Figure 4 As shown, further regarding this scheme, a pump inlet 19 is provided on one side of the pump housing 15, and a pump outlet 20 is provided on one side of the pump housing 26. Liquid enters the pump housing 15 from the pump inlet 19 and then passes through the pump housing 26 and is discharged from the pump outlet 20. A mechanical seal 20 is installed in the middle of the mechanical seal cover 11, and a skeleton oil seal 34 is installed at the end of the shaft sleeve 13 away from the mechanical seal cover 11. Both the mechanical seal 20 and the skeleton oil seal 34 are fitted onto the surface of the pump shaft 2.

[0033] In summary, the motor bracket 1 serves as the connector between the pump and the motor. The motor shaft and pump shaft 2 are connected via a coupling. The first skeleton oil seal 3 is used to seal the lubricating oil in the bearing oil chamber 6. The first bearing 4 is a single-row deep groove ball bearing, fixed on the bearing housing 5. Lubricating oil is added to the bearing oil chamber 6 to lubricate the first bearing 4 and the second bearing 7. The second bearing 7 is a double-row deep groove ball bearing. The first mechanical seal 8 is installed as a second-stage seal in the mechanical seal oil chamber 9 below the second bearing 7. The second mechanical seal 10 is installed as a first-stage seal on the mechanical seal cover 11 below the first mechanical seal 8. Lubricating oil is added to the mechanical seal oil chamber 9 to lubricate the first mechanical seal 8 and the second mechanical seal 10. The second skeleton oil seal 12 is installed at the lower part of the mechanical seal cover 11. The third skeleton oil seal 14 is installed at the lower part of the shaft sleeve 13. Lubricating oil is added to the shaft sleeve 13 to lubricate the second skeleton oil seal 12 and the third skeleton oil seal 14. The second skeleton oil seal 12 and the third skeleton oil seal 14 provide the initial sealing guarantee for the pump.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vertical centrifugal pump, characterized in that, include; Motor bracket (1), bearing oil chamber (6), mechanical seal oil chamber (9), pump housing one (15), pump housing two (16) and base (18); based on base (18), pump housing two (16), pump housing one (15), mechanical seal oil chamber (9), bearing oil chamber (6) and motor bracket (1) are installed on top of base (18) in sequence; The connection between the motor bracket (1) and the bearing oil chamber (6), the connection between the bearing oil chamber (6) and the mechanical seal oil chamber (9), and the pump casing (15) are respectively provided with seal 1, seal 2 and seal 3; A pump shaft (2) is placed in the centrifugal pump. An impeller (17) is fixed at one end of the pump shaft (2). The impeller (17) rotates inside the pump casing (2) and the first seal, the second seal, and the third seal are all connected to the pump shaft (2).

2. A vertical centrifugal pump according to claim 1, characterized in that: The sealing element includes a skeleton oil seal (3) and a bearing (4). The motor bracket (1) and the bearing oil chamber (6) are connected by a bearing seat (5). The bearing (4) is installed at the bearing seat (5) and the skeleton oil seal (3) is installed on the side of the bearing seat (5) facing the motor bracket (1) and is attached to the surface of the pump shaft (2). The skeleton oil seal (3) is used to isolate the motor bracket (1) from the inside of the bearing oil chamber (6).

3. A vertical centrifugal pump according to claim 1, characterized in that: The second sealing element includes a second bearing (7) and a first mechanical seal (8). The mechanical seal oil chamber (9) is connected to the bearing oil chamber (6) and the first pump housing (15) by a flange connection. The second bearing (7) is installed on the side of the mechanical seal oil chamber (9) facing the bearing oil chamber (6), and the first mechanical seal (8) is installed on the side of the mechanical seal oil chamber (9) facing the first pump housing (15).

4. A vertical centrifugal pump according to claim 1, characterized in that: The pump housing (15) is provided with a mechanical seal cover (11) and a bushing (13). The mechanical seal cover (11) is fixed to the side of the mechanical seal oil chamber (9) facing the pump housing (15) and is sleeved on the surface of the pump shaft (2). A skeleton oil seal (12) is provided between the mechanical seal cover (11) and the bushing (13). The skeleton oil seal (12) is also sleeved on the surface of the pump shaft (2).

5. A vertical centrifugal pump according to claim 1, characterized in that: The pump housing 1 (15) has a pump inlet (19) on one side and a pump outlet (20) on one side of the pump housing 2 (16). The liquid enters the pump housing 1 (15) from the pump inlet (19) and then passes through the pump housing 2 (16) and is discharged from the pump outlet (20).

6. A vertical centrifugal pump according to claim 1, characterized in that: Mechanical seal two (10) is installed in the middle of the mechanical seal cover (11), and skeleton oil seal three (14) is installed at the end of the bushing (13) away from the mechanical seal cover (11). Mechanical seal two (10) and skeleton oil seal three (14) are both sleeved on the surface of the pump shaft (2).

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