End-suction segmental horizontal multistage centrifugal pump

Abstract

The utility model discloses an end -in section horizontal multistage centrifugal pump, including the pump body, the pump body has the shaft in the rotation connection, the pump body has the suction section, is equipped with the import on the suction section, a plurality of impellers and a plurality of guide vane are installed on the shaft, balance drum I and balance drum II are installed on the shaft, the balance disc is installed on the shaft, the balance drum I with balance drum II all with the balance disc abuts, the non -driven end of shaft is installed with the shaft sleeve, and the sliding bearing is installed between the shaft sleeve with the suction section, and the elastic baffle ring is installed between the sliding bearing with the suction section, the end of the shaft is provided with the baffle, the baffle with the shaft sleeve abuts, and the baffle is fixedly connected with the shaft through the lock bolt. The utility model has solved the problems, such as large floor area, high material cost, maintenance difficulty, low efficiency in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of horizontal multistage centrifugal pump technology, and in particular to an end-inlet segmental horizontal multistage centrifugal pump. Background Technology

[0002] Currently, the most common structure used in horizontal multistage centrifugal pumps in the industry is a top-inlet suction section, ball bearings at the non-drive end, and a balance disc or balance drum as the balancing structure. This structure has limited radial or axial expansion, a large footprint, strict requirements for installation foundations, and high maintenance costs. The non-drive end bearings are usually located inside the bearing housing, and replacing the bearings requires disassembling the bearing housing, which is time-consuming. In addition, if a balance disc structure is used, high-pressure water can easily leak intermittently between the balance disc and the balance seat, causing energy loss and reducing pump efficiency. If a balance drum structure is used, with frequent changes in axial force, the balance drum cannot dynamically adjust according to changes in operating conditions. When the flow or pressure fluctuates, it is easy to cause excessive residual axial force, which will further accelerate wear over long-term operation, leading to increased clearance, aggravated media leakage, and reduced pump efficiency. It also has high footprint costs, difficult and time-consuming maintenance, and low operating efficiency.

[0003] In view of the problems existing in the above-mentioned prior art, it is necessary to study and design an end-inlet segmental horizontal multistage centrifugal pump to overcome the problems existing in the prior art. Utility Model Content

[0004] The purpose of this invention is to provide an end-inlet segmental horizontal multistage centrifugal pump to solve the problems existing in the prior art, save materials and floor space, reduce costs, facilitate disassembly and reduce maintenance costs, and effectively balance axial forces while improving the overall efficiency of the pump.

[0005] To achieve the above objectives, this utility model provides the following solution: This utility model provides an end-inlet segmental horizontal multistage centrifugal pump, comprising:

[0006] The pump body has a shaft rotatably connected inside it. The pump body has a suction section with an inlet. Several impellers and several guide vanes are mounted on the shaft. Balance drum I and balance drum II are mounted on the shaft. A balance disc is mounted on the shaft. Both balance drum I and balance drum II abut against the balance disc.

[0007] A bushing is installed at the non-driving end of the shaft, a sliding bearing is installed between the bushing and the suction section, an elastic retaining ring is installed between the sliding bearing and the suction section, a baffle is provided at the end of the shaft, the baffle abuts against the bushing, and the baffle is fixedly connected to the shaft by a set bolt.

[0008] The present invention discloses the following technical effects:

[0009] 1. Compared with the top-feed suction section, this device reduces the size of the traditional horizontal multistage centrifugal pump without affecting performance, saving materials and floor space, reducing costs and installation requirements, and increasing the applicability of the centrifugal pump to complex sites.

[0010] 2. Compared with the traditional ball bearing structure used in the non-drive end, this device is easier to disassemble and maintain, saving time and labor costs, and has a longer service life, stronger load-bearing and impact resistance, increasing the centrifugal pump's applicability to complex working conditions.

[0011] 3. Compared with using a balance drum or balance disc alone, this device reduces the leakage of the medium and the wear rate of the balance structure, thereby improving the overall efficiency and service life of the pump.

[0012] In summary, this utility model solves the problems of large footprint, high material cost, difficult maintenance, and low efficiency in the prior art. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This utility model relates to a horizontal multistage centrifugal pump with an end-inlet section.

[0015] The components are as follows: 1. Inhalation section; 2. Set bolt; 3. Baffle; 4. Bushing; 5. Sliding bearing; 6. Elastic retaining ring; 7. Impeller; 8. Guide vane; 9. Balance drum I; 10. Balance drum II; 12. Shaft. Detailed Implementation

[0016] 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.

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Reference Figure 1This utility model provides an end-inlet segmental horizontal multistage centrifugal pump, comprising:

[0019] The pump body has a shaft 12 rotatably connected inside the pump body. The pump body has a suction section 1 with an inlet. Several impellers 7 and several guide vanes 8 are installed on the shaft 12. Balance drum I9 and balance drum II10 are installed on the shaft 12. Balance disc 11 is installed on the shaft 12. Balance drum I and balance drum II10 both abut against balance disc 11.

[0020] A bushing 4 is installed at the non-driving end of shaft 12. A sliding bearing 5 is installed between the bushing 4 and the suction section 1. An elastic retaining ring 6 is installed between the sliding bearing 5 and the suction section 1. A baffle 3 is provided at the end of shaft 12. The baffle 3 abuts against the bushing 4 and is fixedly connected to the shaft by a set bolt 2.

[0021] In this device, the suction section 1 adopts a novel end-inlet suction section. The pump inlet is machined at the end of the suction section 1. Without affecting the performance, the size of the traditional horizontal multistage centrifugal pump is reduced, saving materials and floor space, and reducing costs.

[0022] The non-drive end adopts a structure with sliding bearing 5 and bushing 4. During disassembly and maintenance, simply remove the set bolt 2, remove the baffle 3, and then remove the elastic retaining ring 6 to pull out the bushing 4 and sliding bearing 5. Compared with the traditional ball bearing structure, the step of disassembling the bearing box is eliminated, saving time and labor costs. Moreover, the sliding bearing has a longer service life than the traditional ball bearing structure, reducing maintenance costs. At the same time, the balancing structure has been improved, adopting a combination of balancing drum I9, balancing disc 11, and balancing drum II10, which improves the overall efficiency while effectively balancing axial force.

[0023] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 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.

[0024] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A horizontal multistage centrifugal pump with an end-inlet section, characterized in that, include: The pump body has a shaft (12) rotatably connected inside the pump body. The pump body has a suction section (1) with an inlet. Several impellers (7) and several guide vanes (8) are installed on the shaft (12). A balance drum I (9) and a balance drum II (10) are installed on the shaft (12). A balance disc (11) is installed on the shaft (12). Both the balance drum I and the balance drum II (10) abut against the balance disc (11). A bushing (4) is installed on the non-driving end of the shaft (12). A sliding bearing (5) is installed between the bushing (4) and the suction section (1). An elastic retaining ring (6) is installed between the sliding bearing (5) and the suction section (1). A baffle (3) is provided at the end of the shaft (12). The baffle (3) abuts against the bushing (4). The baffle (3) is fixedly connected to the shaft by a set bolt (2).

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