Horizontal axial flow pump with double impellers driven by single motor

Abstract

The utility model discloses a horizontal axial flow pump with double impellers driven by a single motor, which comprises a bearing box, a pump body and a motor, the bearing box is connected with the pump body, and a rotating shaft of the motor is connected with an input end of the bearing box. An impeller shaft perpendicular to the output shaft is further rotationally supported in the pump body, impellers are arranged at the two ends of the impeller shaft respectively, meanwhile, the middle of the impeller shaft is connected with the output shaft of the motor through a bevel gear transmission pair, the pump body is of a T-shaped structure and comprises an inlet and two outlets, and the central axes of the two outlets are collinear; an inlet is formed in the pump body, a partition plate is arranged at the inlet, the partition plate and a shell part of the pump body jointly divide an inner cavity of the pump body into two independent channels, the two impellers are located in the two channels respectively, two symmetrically-distributed bearing seats are arranged on the shell part of the pump body, and the interiors of the bearing seats are rotationally connected with impeller shafts through sliding bearings.

Description

Technical Field

[0001] The utility model relates to the field of water pumps, in particular to a horizontal axial flow pump with double impellers driven by a single motor. Background Art

[0002] The horizontal axial flow pump is a common pump, which is mainly used under the working conditions of large flow and low head. The axial force of the axial flow pump is very large, and the axial force of the entire pump is borne by only one pair of bearings, which requires higher-specification bearings, thereby increasing the diameter of the pump shaft.

[0003] At the same time, in order to meet the demand for large flow rates, the size of the impeller is often larger. A large impeller means a higher weight of the impeller. In addition, due to the structural limitations of the axial flow pump, the cantilever of the pump shaft is relatively long, which requires a thicker pump shaft and a smaller cantilever ratio at the impeller to maintain the performance of the pump. This results in the length and weight of the horizontal axial flow pump being very large, which not only increases the material cost, but also makes it difficult to process and install overweight workpieces. The excessive size and weight not only increase the cost but also are not conducive to on-site installation and maintenance.

[0004] Therefore, a method or device capable of solving the above problems is now needed. Summary of the invention

[0005] The utility model aims to solve the above-mentioned deficiencies in the prior art and proposes a horizontal axial flow pump with a single motor driven double impeller which has a simple structure, ingenious design, reasonable layout, light weight, small size and can greatly reduce the axial force borne by the pump shaft.

[0006] The technical solution of the utility model is: a horizontal axial flow pump with a single motor driving a double impeller, comprising a bearing box 1, a pump body 2 and a motor, wherein the bearing box 1 and the pump body 2 are connected to each other, and the rotating shaft of the motor is connected to the input end of the bearing box 1, and is characterized in that: the end of the output shaft of the bearing box 1 is located in the pump body 2, and at the same time, an impeller shaft 3 perpendicular to the output shaft is also rotatably supported in the pump body 2, and impellers 4 are respectively arranged at both ends of the impeller shaft 3, and at the same time, the middle part of the impeller shaft 3 is connected to the output shaft of the motor through a bevel gear transmission pair 5,

[0007] The pump body 2 is a T-shaped structure, which includes an inlet 6 and two outlets 7, and the central axes of the two outlets 7 are collinear. A partition 8 is provided at the inlet 6, and the partition 8 and the outer shell 9 of the pump body 2 together divide the inner cavity of the pump body 2 into two independent channels 10. The two impellers 4 are respectively located in the two channels 10.

[0008] Two symmetrically distributed bearing seats 11 are arranged on the outer shell portion 9 of the pump body 2 , and the bearing seats 11 are rotatably connected to the impeller shaft 3 via sliding bearings 12 .

[0009] Compared with the prior art, the utility model has the following advantages:

[0010] This type of horizontal axial flow pump with a single motor driving two impellers has a simple structure, ingenious design and reasonable layout. It aims at the problems existing in the working process of the traditional horizontal axial flow pump and designs a special structure. The pump body is changed into a special T-shaped structure, that is, a structure with one inlet and two outlets, and an impeller shaft is set in the pump body. The impellers at both ends of the impeller shaft correspond to an outlet respectively. The impeller shaft in this structure will not generate axial force, so the output shaft of the motor will not bear axial force. Therefore, the overall structure of this pump can be simplified, and lighter and smaller parts can be used to make it, which can fully meet the requirements of technical indicators. It can save costs and reduce weight, and its manufacturing process is simple and the manufacturing cost is low. Therefore, it can be said that it has many advantages and is particularly suitable for promotion and application in this field. Its market prospects are very broad. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a cross-sectional view (front view direction) of an embodiment of the utility model.

[0012] Figure 2 It is a cross-sectional view (top view) of an embodiment of the utility model. DETAILED DESCRIPTION

[0013] The specific implementation of the present utility model will be described below in conjunction with the accompanying drawings. Figure 1 , Figure 2 As shown: a horizontal axial flow pump with a single motor driving a double impeller, comprising a bearing box 1, a pump body 2 and a motor, wherein the bearing box 1 and the pump body 2 are connected to each other, the rotating shaft of the motor is connected to the input end of the bearing box 1, the end of the output shaft of the bearing box 1 is located in the pump body 2, and an impeller shaft 3 perpendicular to the output shaft is rotatably supported in the pump body 2, and impellers 4 are respectively arranged at both ends of the impeller shaft 3, and the middle part of the impeller shaft 3 is connected to the output shaft of the motor through a bevel gear transmission pair 5,

[0014] The pump body 2 is a T-shaped structure, which includes an inlet 6 and two outlets 7, and the central axes of the two outlets 7 are collinear. A partition 8 is provided at the inlet 6, and the partition 8 and the outer shell 9 of the pump body 2 together divide the inner cavity of the pump body 2 into two independent channels 10. The two impellers 4 are respectively located in the two channels 10.

[0015] Two symmetrically distributed bearing seats 11 are arranged on the outer shell portion 9 of the pump body 2 , and the bearing seats 11 are rotatably connected to the impeller shaft 3 via sliding bearings 12 .

[0016] The working process of the horizontal axial flow pump with double impellers driven by a single motor in the embodiment of the utility model is as follows: when the motor is working, its output shaft rotates, and the output shaft drives the impeller shaft 3 to rotate through the bevel gear transmission pair 5. When the impeller shaft 3 rotates, the impellers 4 at both ends rotate at the same time.

[0017] The medium to be pumped enters the inner cavity of the pump body 2 through the inlet 6, and enters the two channels 10 respectively, and is finally discharged through the two channels 10. In actual use, pipelines can be connected to the outlets 7 of the two channels 10 respectively. In this state, the horizontal axial flow pump can supply water to two locations respectively, or the two managed outlets can be combined into one;

[0018] Since impellers 4 are provided at both ends of the impeller shaft 3, theoretically, the axial force borne by the impeller shaft 3 is balanced, thus solving the problem of the pump shaft being subjected to a large axial force in the traditional horizontal axial flow pump. Therefore, a sliding bearing 12 that does not need to bear the axial force can be selected to realize the relative rotation of the impeller shaft 3. Compared with the traditional structure, this has a lower cost, controllable cost, relatively small size, and lighter weight than the traditional structure.

Claims

1. A horizontal axial flow pump with a single motor driving a double impeller, comprising a bearing box (1), a pump body (2) and a motor, wherein the bearing box (1) and the pump body (2) are connected to each other, and the rotating shaft of the motor is connected to the input end of the bearing box (1), characterized in that: The end of the output shaft of the bearing box (1) is located in the pump body (2), and an impeller shaft (3) perpendicular to the output shaft is rotatably supported in the pump body (2). Impellers (4) are respectively arranged at both ends of the impeller shaft (3), and the middle part of the impeller shaft (3) is connected to the output shaft of the motor through a bevel gear transmission pair (5). The pump body (2) is of a T-shaped structure, comprising an inlet (6) and two outlets (7), wherein the central axes of the two outlets (7) are collinear, a partition (8) is provided at the inlet (6), and the partition (8) and the outer shell (9) of the pump body (2) together divide the inner cavity of the pump body (2) into two independent channels (10), and the two impellers (4) are respectively located in the two channels (10). Two symmetrically distributed bearing seats (11) are arranged on the outer shell part (9) of the pump body (2), and the bearing seats (11) are rotatably connected to the impeller shaft (3) via a sliding bearing (12).

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