Integrated vertical sewage pump

Abstract

The utility model discloses an integrated vertical sewage pump which comprises a heat dissipation assembly, a motor, a rotating shaft, an upper bearing seat, a lower bearing seat, a mechanical sealing assembly and an impeller. The heat dissipation assembly is arranged at the upper end of the rotating shaft; the upper bearing seat is arranged at the upper part of the rotating shaft, and the lower bearing seat is arranged at the lower part of the rotating shaft; the motor is arranged on the outer side of the middle of the rotating shaft; the motor is positioned below the upper bearing seat; the mechanical sealing assembly is arranged below the lower bearing seat, and the impeller is arranged at the bottom end of the rotating shaft and fixedly connected with the rotating shaft. The length of the rotating shaft is reduced, the height of the pump body is reduced, the operation stability and the operation efficiency of the water pump are improved, and meanwhile the service life of the mechanical seal is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic machinery, in particular to an integrated vertical sewage pump. Background Art

[0002] The water pump provides potential energy and pressure energy for water, and is the power source for solving the problems of irrigation, drainage, water supply and water resource allocation under the condition of no gravity flow. The sewage pump is mainly used for: the collection and transportation of wastewater and sewage in residential areas, restaurants, schools, factories or rural communities; the construction and transformation of municipal sewage pipe networks; the water circulation of lakes; long-distance pipeline transportation and other working conditions; the types of pumping media include: sewage, rainwater, industrial wastewater, and source water from rivers and lakes. There are two main types of sewage pumps: submersible sewage pumps and vertical sewage pumps. The submersible sewage pump is to place the pump body in the sewage for operation. When in use, it slides into the water through the guide rod and couples with the pre-installed base. It uses its own gravity to cooperate with the seal to ensure the sealing of the pipeline. However, due to long-term immersion in water, its sealing requirements are high, and the pump body often burns out due to leakage. In addition, the seals at the coupling are mostly rubber parts, which are easily aged and fail to seal after long-term immersion in sewage, affecting the performance. As another type of sewage pump, the vertical sewage pump is used in a dry environment. The pipe interface is sealed with flanges and fasteners to ensure stable and reliable use. In addition, the operating status of the water pump (such as vibration, noise, etc.) is clear at a glance. And maintenance is convenient and can be carried out directly in the pump room.

[0003] The vertical sewage pump consists of a motor part and a pump head part. The two are connected by a motor frame, and the motor shaft and the pump shaft are connected by a coupling. The pump head part mainly includes: a bearing seat, a mechanical seal, a mechanical seal seat, an impeller, a volute and a water inlet base. Since the motor part and the pump head part are separate, and there is a motor frame connected in the middle, it is relatively long in structure, and it is easy to vibrate when the water pump is running. This structure causes the overall height of the vertical sewage pump to be relatively high, especially for large vertical sewage pumps, which affects the height of the pump room to a certain extent. Furthermore, this type of pump is divided into a motor shaft and a pump shaft, and the two are connected and driven by a coupling. Due to the existence of transmission loss, some efficiency loss occurs. Summary of the invention

[0004] Technical problem: The technical problem to be solved by the utility model is: to provide an integrated vertical sewage pump, which reduces the length of the rotating shaft, lowers the height of the pump body, improves the stability and efficiency of the operation of the water pump, and at the same time extends the service life of the mechanical seal.

[0005] Technical solution: To solve the above technical problems, the technical solution adopted by the embodiment of the utility model is:

[0006] An integrated vertical sewage pump comprises a heat dissipation assembly, a motor, a rotating shaft, an upper bearing seat, a lower bearing seat, a mechanical seal assembly and an impeller; the heat dissipation assembly is arranged at the upper end of the rotating shaft; the upper bearing seat is arranged at the upper part of the rotating shaft, and the lower bearing seat is arranged at the lower part of the rotating shaft; the motor is arranged on the outer side of the middle part of the rotating shaft; the motor is located below the upper bearing seat; the mechanical seal assembly is arranged below the lower bearing seat, and the impeller is arranged at the bottom end of the rotating shaft and is fixedly connected to the rotating shaft.

[0007] As a preferred example, the heat dissipation assembly includes a fan and a fan cover; the fan is mounted on the top of the rotating shaft and is located above the upper bearing seat; the bottom end of the fan is higher than the top end of the upper bearing seat; the fan cover is inverted on the outside of the fan, and the lower end of the fan cover is fixedly connected to the upper bearing seat.

[0008] As a preferred example, the diameter of the fan cover is larger than the diameter of the upper bearing seat, and an air guide duct is formed between the inner surface of the side wall of the fan cover and the outer surface of the side wall of the upper bearing seat.

[0009] As a preferred example, the mechanical seal assembly includes a mechanical seal seat and a mechanical seal; the mechanical seal seat is arranged below the lower bearing seat and fixedly connected to the lower bearing seat; the mechanical seal is arranged in a cavity between the lower bearing seat and the mechanical seal seat.

[0010] As a preferred example, the mechanical seal is a single-channel double-end mechanical seal structure; the mechanical seal passes through the rotating shaft, one end of the mechanical seal is fixedly connected to the lower bearing seat, and the other end is fixedly connected to the mechanical seal seat.

[0011] As a preferred example, an integrated vertical sewage pump further includes a skeleton oil seal; the skeleton oil seal is arranged below the mechanical seal, and the skeleton oil seal passes through the rotating shaft and is fixedly connected to the mechanical seal seat.

[0012] As a preferred example, an integrated vertical sewage pump also includes a volute and a water inlet base; the impeller is arranged inside the volute, the top of the volute is connected to the lower bearing seat; the bottom of the volute is connected to the water inlet base.

[0013] Beneficial effects: Compared with the prior art, the technical solution of the utility model has the following beneficial effects: The technical solution of the utility model combines the motor shaft and the pump shaft into a rotating shaft, which reduces the height of the water pump and shortens the distance the rotating shaft extends, so that the vibration generated when the water pump is running is smaller and the stability of the structure is improved. The motor is directly connected to the impeller, the coupling is eliminated, the transmission loss is reduced, and the working efficiency of the water pump is improved. At the same time, a single-channel double-ended mechanical seal structure and a skeleton oil seal are set, so that the mechanical seal is completely wrapped inside the cavity and will not directly contact the sewage, thereby making it difficult for the mechanical seal to be damaged by contact with debris, thereby extending the service life of the mechanical seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of an embodiment of the utility model.

[0015] The figure includes: fan 1, fan cover 2, motor 3, rotating shaft 4, upper bearing seat 5, lower bearing seat 6, mechanical seal seat 7, mechanical seal 8, skeleton oil seal 9, impeller 10, volute 11, and water inlet base 12. DETAILED DESCRIPTION

[0016] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings.

[0017] like Figure 1 As shown, an integrated vertical sewage pump of an embodiment of the utility model includes a heat dissipation component, a motor 3, a rotating shaft 4, an upper bearing seat 5, a lower bearing seat 6, a mechanical seal component and an impeller 10; the heat dissipation component is arranged at the upper end of the rotating shaft 4; the upper bearing seat 5 is arranged at the upper part of the rotating shaft 4, and the lower bearing seat 6 is arranged at the lower part of the rotating shaft 4; the motor 3 is arranged on the outer side of the middle part of the rotating shaft 4; the motor 3 is located below the upper bearing seat 5; the mechanical seal component is arranged below the lower bearing seat 6, and the impeller 10 is arranged at the bottom end of the rotating shaft 4 and fixedly connected to the rotating shaft 4.

[0018] In an integrated vertical sewage pump of the above structure, the motor shaft and the pump shaft are eliminated, and a rotating shaft 4 is used instead, and the motor frame and the coupling that play a connecting role are eliminated, so that the height of the water pump can be reduced, thereby reducing the manufacturing cost. A rotating shaft 4 is set to connect the motor 3 and the impeller 10 at the same time, so that the extension distance of the rotating shaft 4 can be shorter, the water pump is not easy to vibrate during operation, and the overall structure is more stable during operation; and the motor 3 and the impeller 10 are directly connected through the rotating shaft 4, which eliminates the transmission loss of the coupling and improves the efficiency of the water pump. At the same time, the mechanical seal 8 is changed to a single-channel double-end mechanical seal structure, so that the mechanical seal 8 can be completely wrapped in the oil-filled cavity formed by the lower bearing seat 6 and the mechanical seal seat 7, and a skeleton oil seal 9 is set below the mechanical seal 8 to ensure that the mechanical seal 8 will not directly contact the sewage, will not be entangled and worn by debris, and increase the service life of the mechanical seal 8, thereby increasing the service life of the overall water pump.

[0019] As a preferred example, the heat dissipation assembly includes a fan 1 and a fan cover 2; the fan 1 is mounted on the top of the rotating shaft 4 and is located above the upper bearing seat 5; the bottom end of the fan 1 is higher than the top end of the upper bearing seat 5; the fan cover 2 is inverted outside the fan 1, and the lower end of the fan cover 2 is fixedly connected to the upper bearing seat 5. When the water pump is running, the fan 1 rotates synchronously with the rotating shaft 4. When the fan 1 rotates, cold air is generated to cool the motor 3. The bottom end of the fan 1 is higher than the top end of the bearing seat 5; it is ensured that the fan 1 and the bearing seat 5 will not contact each other, and cold air can be continuously generated for cooling.

[0020] As a preferred example, the diameter of the fan cover 2 is larger than the diameter of the upper bearing seat 5, and a guide air duct is formed between the inner surface of the side wall of the fan cover 2 and the outer surface of the side wall of the upper bearing seat 5. The fan cover 2 is inverted outside the fan 1, and the cold air generated by the fan 1 diffuses outward inside the fan cover 2. Since a guide air duct is formed between the inner surface of the side wall of the fan cover 2 and the outer surface of the side wall of the upper bearing seat 5, the cold air generated by the fan 1 will run downward through the guide air duct, and the motor is arranged below the upper bearing seat 5, so the cold air generated by the fan 1 passes through the guide air duct and blows onto the motor 3, thereby completing the cooling of the motor 3, improving the heat dissipation effect of the motor 3, and further improving the working efficiency.

[0021] As a preferred example, the mechanical seal assembly includes a mechanical seal seat 7 and a mechanical seal 8; the mechanical seal seat 7 is arranged below the lower bearing seat 6 and is fixedly connected to the lower bearing seat 6; the mechanical seal 8 is arranged in the cavity between the lower bearing seat 6 and the mechanical seal seat 7. The mechanical seal 8 is arranged in the oil-filled cavity between the lower bearing seat 6 and the mechanical seal seat 7 to seal the pumped sewage, prevent the sewage from entering the oil chamber, and then enter the motor cavity, so as to ensure the safety and stability of the motor operation.

[0022] As a preferred example, the mechanical seal 8 is a single-channel double-end mechanical seal structure; the mechanical seal 8 passes through the rotating shaft 4, one end is fixedly connected to the lower bearing seat 6, and the other end is fixedly connected to the mechanical seal seat 7. Changing the traditional two-channel independent mechanical seal to a single-channel double-end mechanical seal structure can reduce the axial size, reduce the height of the vertical sewage pump, and thus reduce the cost of the sewage pump; at the same time, the single-channel double-end mechanical seal structure can be completely wrapped in the oil-filled cavity formed by the bearing seat and the mechanical seal seat, so as not to directly contact the sewage, and not to be affected by debris in terms of operating efficiency and service life.

[0023] As a preferred example, an integrated vertical sewage pump further includes a skeleton oil seal 9; the skeleton oil seal 9 is arranged below the mechanical seal 8, and the skeleton oil seal 9 passes through the rotating shaft 4 and is fixedly connected to the mechanical seal seat 7. A skeleton oil seal 9 is arranged on the mechanical seal seat 7, so that the mechanical seal 8 and the skeleton oil seal 9 can cooperate with each other, further ensuring that the mechanical seal 8 will not contact the sewage, and increasing the service life of the mechanical seal 8.

[0024] As a preferred example, an integrated vertical sewage pump further includes a volute 11 and a water inlet base 12; the impeller 10 is arranged inside the volute 11, the top of the volute 11 is connected to the lower bearing seat 6; the bottom of the volute 11 is connected to the water inlet base 12. The impeller 10 at the lower end of the rotating shaft 4 works on the water, and the impeller 10 lifts the water under the water inlet base 12 upward. The impeller 10 is arranged inside the volute 11, so that the working efficiency of the impeller 10 is higher, and the discharge and treatment effect of sewage is better.

[0025] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above specific embodiments. The above specific embodiments and the description in the specification are only for further illustrating the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the claims and their equivalents.

Claims

1. An integrated vertical sewage pump, characterized in that: The invention comprises a heat dissipation component, a motor (3), a rotating shaft (4), an upper bearing seat (5), a lower bearing seat (6), a mechanical seal component and an impeller (10); the heat dissipation component is arranged at the upper end of the rotating shaft (4); the upper bearing seat (5) is arranged at the upper part of the rotating shaft (4), and the lower bearing seat (6) is arranged at the lower part of the rotating shaft (4); the motor (3) is arranged at the outer side of the middle part of the rotating shaft (4); the motor (3) is located below the upper bearing seat (5); the mechanical seal component is arranged below the lower bearing seat (6), and the impeller (10) is arranged at the bottom end of the rotating shaft (4) and is fixedly connected to the rotating shaft (4).

2. The integrated vertical sewage pump according to claim 1, characterized in that: The heat dissipation assembly comprises a fan (1) and a fan cover (2); the fan (1) is sleeved on the top of a rotating shaft (4) and is located above an upper bearing seat (5); the bottom end of the fan (1) is higher than the top end of the upper bearing seat (5); the fan cover (2) is inverted outside the fan (1), and the lower end of the fan cover (2) is fixedly connected to the upper bearing seat (5).

3. The integrated vertical sewage pump according to claim 2, characterized in that: The diameter of the fan cover (2) is greater than the diameter of the upper bearing seat (5), and a guide air duct is formed between the inner surface of the side wall of the fan cover (2) and the outer surface of the side wall of the upper bearing seat (5).

4. The integrated vertical sewage pump according to claim 1, characterized in that: The mechanical seal assembly comprises a mechanical seal seat (7) and a mechanical seal (8); the mechanical seal seat (7) is arranged below the lower bearing seat (6) and is fixedly connected to the lower bearing seat (6); the mechanical seal (8) is arranged in a cavity between the lower bearing seat (6) and the mechanical seal seat (7).

5. The integrated vertical sewage pump according to claim 4, characterized in that: The mechanical seal (8) is a single-channel double-end mechanical seal structure; the mechanical seal (8) passes through the rotating shaft (4), one end of which is fixedly connected to the lower bearing seat (6), and the other end of which is fixedly connected to the mechanical seal seat (7).

6. The integrated vertical sewage pump according to claim 5, characterized in that: It also includes a skeleton oil seal (9); the skeleton oil seal (9) is arranged below the mechanical seal (8); the skeleton oil seal (9) passes through the rotating shaft (4) and is fixedly connected to the mechanical seal seat (7).

7. The integrated vertical sewage pump according to claim 1, characterized in that: It also includes a volute (11) and a water inlet base (12); the impeller (10) is arranged inside the volute (11); the top of the volute (11) is connected to the lower bearing seat (6); and the bottom of the volute (11) is connected to the water inlet base (12).

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