Vertical diagonal flow pump with semi-core-pulling structure

Abstract

The utility model relates to a vertical diagonal flow pump with a semi-core-pulling structure, which comprises an outer shell part and a core-pulling part, the core-pulling part is arranged in the outer shell part, the outer shell part comprises a guide vane body outer shell, the core-pulling part comprises an impeller and a guide vane inner cylinder, and a sealing ring is arranged between the guide vane body outer shell and the guide vane inner cylinder during installation. The upper end of the guide vane inner cylinder is connected with the protective tube, the guide bearing is placed inside, and the outside is in sliding contact with the guide vane body shell. According to the vertical diagonal flow pump of the semi-core-pulling structure, a hydraulic model is optimized, so that the inner circle of the guide vane of the water pump is larger than the maximum outer circle of the impeller, and on the premise that a guide vane runner is fixed, quick-wear parts such as the impeller and a bearing can be directly pulled out; the guide vane outlet runner is shrunk, so that the energy loss of the water pump is reduced; the guide vane is in sliding contact with the core-pulling part, the contact surface of the core-pulling part is provided with the sealing ring groove, and the O-shaped sealing ring is adopted for sealing, so that the sealing performance of an inlet and an outlet of the water pump with the semi-core-pulling structure is ensured.

Description

Technical Field

[0001] The utility model relates to a vertical mixed-flow pump, in particular to a vertical mixed-flow pump with a semi-core-pulling structure that optimizes the pump structure, reduces the maintenance difficulty, and improves the pump efficiency. Background Art

[0002] Vertical mixed-flow pumps are widely used in power plant circulating water pumps, seawater intake pumps, and water regulation pump stations. With the increasing water demand in related industries such as power plants, the diameter of the vertical mixed-flow pump, which is the source intake pump, is getting larger and larger. The designed flow rate of the pump has increased from 20,000 m 3 / h to 50,000 m 3 / h. Since the designed annual operating time of the vertical mixed-flow pump is relatively long, in order to facilitate equipment maintenance, the vertical mixed-flow pump usually adopts a core-pulling structure design, that is, the external shell of the pump is fixed, and the internal rotor components can be directly pulled out from the upper end of the pump.

[0003] The currently common core-pulling structure is: the impeller, runner chamber, guide vane body, main shaft, protection tube, and intermediate bearing of the pump are designed as a whole and pulled out. The disadvantage of this structure is that the circumferential dimension of the guide vane of the vertical mixed-flow pump is relatively large. In order to pull out the guide vane body as a whole, the outer cylinder of the pump will be made very large, resulting in an increase in the cost of the pump. At the same time, the size of the guide vane outlet flow channel is enlarged, and the energy loss increases, affecting the performance of the pump. Content of the Utility Model

[0004] Aiming at the above problems, the main purpose of the utility model is to provide a vertical mixed-flow pump with a semi-core-pulling structure that optimizes the pump structure, reduces the maintenance difficulty, and improves the pump efficiency.

[0005] The utility model solves the above technical problems through the following scheme: A vertical mixed-flow pump with a semi-core-pulling structure, the vertical mixed-flow pump with a semi-core-pulling structure includes: a housing component and a core-pulling component. The core-pulling component is installed in the housing component. The housing component includes a guide vane body housing. The core-pulling component includes an impeller and an inner guide vane cylinder. During installation, a sealing ring is installed between the guide vane body housing and the inner guide vane cylinder. The upper end of the inner guide vane cylinder is connected to the protection tube, and a guide bearing is placed inside. The outside is in sliding contact with the guide vane body housing.

[0006] In a specific embodiment of the utility model, the sealing ring is an "O" - shaped sealing ring.

[0007] In a specific embodiment of the utility model, the guide vane is in sliding contact with the core-pulling component, and a sealing ring groove is provided on the contact surface of the core-pulling part, and is sealed with an "O" - shaped sealing ring.

[0008] In a specific embodiment of the utility model, the inner circle of the pump guide vane is larger than the maximum outer circle of the impeller.

[0009] In a specific embodiment of the present utility model, the outlet flow channel of the guide vane is a contracting structure inward.

[0010] The positive and progressive effects of the present utility model are as follows: Compared with common similar technologies, the vertical mixed-flow pump with a semi-core-pulling structure provided by the present utility model is mainly different from the traditional core-pulling structure in the following aspects: (1) For the vertical mixed-flow pump with a semi-core-pulling structure, by optimizing the hydraulic model, the inner circle of the pump guide vane is larger than the maximum outer circle of the impeller. On the premise that the guide vane flow channel remains stationary, vulnerable parts such as the impeller and bearings can be directly pulled out; (2) The contraction of the guide vane outlet flow channel reduces the energy loss of the pump; (3) The guide vane is in sliding contact with the core-pulling component, and a sealing ring groove is provided on the contact surface of the core-pulling part. An "O"-type sealing ring is used for sealing, ensuring the sealing performance of the inlet and outlet of the semi-core-pulling structure pump. Brief Description of the Drawings

[0011] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0012] Figure 2 It is a schematic diagram of the structure of the housing component of the mixed-flow pump with a semi-core-pulling structure.

[0013] Figure 3 It is a schematic diagram of the structure of the core-pulling component of the mixed-flow pump with a semi-core-pulling structure.

[0014] The following are the names corresponding to the reference numerals in the present utility model:

[0015] Impeller 10, blade body housing 20, guide vane inner cylinder 30, sealing ring 40, protective tube 301, guide bearing 302. Detailed Embodiment

[0016] The following provides a preferred embodiment of the present utility model in conjunction with the drawings to elaborate in detail on the technical solution of the present utility model.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present utility model, Figure 2 It is a schematic diagram of the structure of the housing component of the mixed-flow pump with a semi-core-pulling structure, Figure 3 It is a schematic diagram of the structure of the core-pulling component of the mixed-flow pump with a semi-core-pulling structure. As Figures 1 - 3 shown: A vertical mixed-flow pump with a semi-core-pulling structure provided by the present utility model includes a housing component and a core-pulling component. The core-pulling component is installed inside the housing component. The housing component includes a guide vane body housing 20, and the core-pulling component includes an impeller 10 and a guide vane inner cylinder 30. During installation, a sealing ring 40 is installed between the guide vane body housing 20 and the guide vane inner cylinder 30. The upper end of the guide vane inner cylinder 30 is connected to a protective tube 301, and a guide bearing 302 is placed inside. The outside is in sliding contact with the guide vane body housing 20, transmitting the radial force of the pump rotor to the guide vane body housing. The sealing ring 40 in the present utility model is an "O"-type sealing ring.

[0018] In the present utility model, the guide vane is in sliding contact with the core-pulling component. A sealing ring groove 401 is provided on the contact surface of the core-pulling part, and an "O"-shaped sealing ring is used for sealing. The inner circle of the guide vane of the present utility model is larger than the maximum outer circle of the impeller. The outlet flow channel of the guide vane of the present utility model is a contraction structure inward.

[0019] In the specific implementation process, the hydraulic model of the impeller 10 in the present utility model has been optimized. While meeting the requirements of the semi-core-pulling structure design, it still maintains excellent hydraulic performance.

[0020] The inner circle dimension of the guide vane of the present utility model moves outward compared with the traditional structure, enabling the impeller 10 to be completely withdrawn from the inside of the guide vane body.

[0021] The upper end of the inner cylinder 30 of the guide vane is connected to the protection tube, and a guide bearing is placed inside. It is in sliding contact with the outer shell 20 of the guide vane body on the outside, transmitting the radial force of the water pump rotor to the outer shell of the guide vane body.

[0022] By optimizing the hydraulic model, the present utility model makes the internal circumferential dimension of the guide vane larger than the maximum outer circle of the impeller, enabling the impeller to be completely withdrawn from the inside of the guide vane body, optimizing the water pump structure and reducing the maintenance difficulty; when in use, this structure changes the disadvantages of the large outer shell size and high manufacturing cost of the traditional core-pulling structure; at the same time, the outlet of the guide vane is no longer suddenly diffused due to structural limitations, and the outlet section is evenly diffused, reducing the hydraulic loss inside the pump and improving the water pump efficiency.

[0023] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A vertical diagonal flow pump with a semi-core-pulling structure, characterized in that: The vertical diagonal flow pump with a semi-core-pulling structure comprises: a shell component and a core-pulling component, wherein the core-pulling component is installed in the shell component, the shell component comprises a guide vane body shell (20), and the core-pulling component comprises an impeller (10) and a guide vane inner cylinder (30). During installation, a sealing ring (40) is installed between the guide vane body shell (20) and the guide vane inner cylinder (30), the upper end of the guide vane inner cylinder (30) is connected to a protective tube (301), a guide bearing (302) is placed inside, and the outside is in sliding contact with the guide vane body shell (20).

2. The vertical diagonal flow pump with a semi-core-pulling structure according to claim 1 is characterized in that: The sealing ring (40) is an "O" type sealing ring.

3. The vertical diagonal flow pump with a semi-core-pulling structure according to claim 1 is characterized in that: The guide vane is in sliding contact with the core pulling component, and a sealing ring groove (401) is provided on the contact surface of the core pulling part, and an "O" type sealing ring is used for sealing.

4. The vertical diagonal flow pump with a semi-core-pulling structure according to claim 1 is characterized in that: The inner circle of the water pump guide vane is larger than the maximum outer circle of the impeller.

5. The vertical diagonal flow pump with a semi-core-pulling structure according to claim 1 is characterized in that: The outlet flow channel of the guide vane is an inwardly contracting structure.

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