Horizontal single-stage double-suction centrifugal pump

Abstract

The utility model discloses a horizontal single-stage double-suction centrifugal pump, and belongs to the technical field of centrifugal pumps. A horizontal single-stage double-suction centrifugal pump comprises a pump base, a retainer is mounted on one side of the pump base, a servo motor is mounted at the upper end of the other side of the pump base, a coupler is mounted between the servo motor and the pump base, and a supporting frame is mounted between the coupler and the retainer. The problems that in the actual using process of an existing centrifugal pump, the connection of a motor shaft between a horizontal motor and the centrifugal pump is prone to being affected by vibration, and instability is generated are solved, in the long-term working process, shaking generated by a centrifugal pump body can be limited through the cushioning damper below the retainer, and therefore the stability of the centrifugal pump is improved. And the high-pressure spring supports the coupler and the supporting frame, the position of the coupler is kept stable, abrasion generated by the transmission shaft is reduced, rotating shaft deformation caused by shaking is prevented, and the working quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a horizontal single-stage double-suction centrifugal pump. Background Art

[0002] The existing horizontal direct-connected single-stage double-suction centrifugal pump generates large vibrations during operation due to the large water flow rate. Long-term vibration will cause the connection between the water pipe and the suction port to loosen or even detach from the suction port, affecting the liquid suction work and also affecting the motor.

[0003] Chinese patent publication number CN218624663U discloses a new type of horizontal single-stage double-suction split-case centrifugal pump, including a protective base. The centrifugal pump adopts a special protective structure that can multiple-dissipate and disperse the vibration energy generated by the pump body during operation, thereby reducing the amplitude of the pump body shaking during operation, making its operation more stable and reliable. It uses multiple centrifugal blades on both sides to work together to improve the suction of the pump body while increasing the working efficiency of the centrifugal pump.

[0004] During actual use of the centrifugal pump of the above patent, the motor shaft connection between the horizontal motor and the centrifugal pump is susceptible to vibration, resulting in instability; therefore, it does not meet existing needs. In response to this, we propose a horizontal single-stage double-suction centrifugal pump. Utility Model Content

[0005] The purpose of the utility model is to provide a horizontal single-stage double-suction centrifugal pump, which solves the problem that during actual use of the centrifugal pump proposed in the above background technology, the motor shaft connection between the horizontal motor and the centrifugal pump is easily affected by vibration and causes instability.

[0006] To achieve the above-mentioned objectives, the present utility model provides the following technical solutions: a horizontal single-stage double-suction centrifugal pump, comprising a pump base, a retaining frame installed on one side of the pump base, a centrifugal pump body installed above the retaining frame, a servo motor installed on the upper end of the other side of the pump base, a coupling installed between the servo motor and the pump base, and a support frame installed between the coupling and the retaining frame.

[0007] Preferably, a hinge is installed between the pump base and the retaining frame, and one end of the retaining frame is movably connected to the pump base through the hinge.

[0008] Preferably, a shock absorber is installed at the other end of the retaining frame, the lower end of the shock absorber is movably connected to the pump base through a connecting ear, the upper end of the shock absorber is installed with a connecting ring, the upper end of the shock absorber is movably connected to the retaining frame through a connecting ring, and hydraulic oil is provided inside the shock absorber.

[0009] Preferably, the lower end of the servo motor is fixedly connected to the pump base, and a transmission shaft is installed at one end of the servo motor, and the transmission shaft is transmission-connected to the motor shaft of the servo motor.

[0010] Preferably, a centrifugal impeller is installed inside the centrifugal pump body, a shaft sleeve is provided inside the coupling, the transmission shaft passes through the coupling and is rotatably connected to the coupling via the shaft sleeve, and the transmission shaft passes through the coupling and is fixedly connected to the centrifugal impeller.

[0011] Preferably, one end of the coupling is fixedly connected to the centrifugal pump body, the lower end of the coupling is welded to the support frame, a high-pressure spring is installed below the support frame, the high-pressure spring is fixedly connected to the support frame and the retaining frame respectively, and the centrifugal pump body is fixedly connected to one end of the retaining frame.

[0012] Preferably, a drainage pipe is provided at the front end of the centrifugal pump body, and a water suction pipe is installed above the centrifugal pump body.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. When the centrifugal pump body of the present invention is in operation, the servo motor drives the transmission shaft to drive the impeller inside the centrifugal pump body to rotate, thereby performing double-suction pumping. During operation, the position of the transmission shaft is kept stable by the coupling, and the lower end of the coupling is connected to the middle upper end of the retaining frame through a support frame and a high-pressure spring. When the centrifugal pump body and the servo motor are working, the overall vibration is limited by the shock-absorbing damper under the retaining frame, thereby reducing the vibration amplitude and maintaining the position of the centrifugal pump body stable.

[0015] 2. The utility model can limit the vibration of the centrifugal pump body during long-term operation through the shock-absorbing damper under the retaining frame, and then support the coupling and the support frame through the high-pressure spring to keep the position of the coupling stable, reduce the wear of the transmission shaft, prevent the deformation of the rotating shaft caused by the vibration, and improve the work quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an axonometric drawing of the front view of the present invention;

[0017] Figure 2 For this utility model Figure 1 A partial enlarged view of area A in the middle;

[0018] Figure 3 This is an axonometric view of the present invention from above;

[0019] Figure 4 It is an axonometric view of the side view of the utility model.

[0020] In the figure: 1. Pump base; 101. Retaining frame; 102. Shock absorber; 103. Connecting ring; 2. Servo motor; 201. Drive shaft; 3. Coupling; 301. Support frame; 302. High-pressure spring; 4. Centrifugal pump body; 401. Drain pipe; 402. Suction pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] In order to solve the problem that the existing centrifugal pumps generate instability during actual use, which is not conducive to long-term operation, please refer to Figure 1 - Figure 4 , this embodiment provides the following technical solutions:

[0023] A horizontal single-stage double-suction centrifugal pump includes a pump base 1, a retaining frame 101 is installed on one side of the pump base 1, a centrifugal pump body 4 is installed above the retaining frame 101, a servo motor 2 is installed on the upper end of the other side of the pump base 1, a coupling 3 is installed between the servo motor 2 and the pump base 1, and a support frame 301 is installed between the coupling 3 and the retaining frame 101. During operation, the position of the transmission shaft 201 is kept stable by the coupling 3, and the lower end of the coupling 3 is connected to the middle upper end of the retaining frame 101 through the support frame 301 and the high-pressure spring 302. When the centrifugal pump body 4 and the servo motor 2 are working, the overall vibration is limited by the shock-absorbing damper 102 below the retaining frame 101.

[0024] A hinge is installed between the pump base 1 and the retaining frame 101 , and one end of the retaining frame 101 is movably connected to the pump base 1 through the hinge.

[0025] A shock absorber 102 is installed at the other end of the retaining frame 101. The lower end of the shock absorber 102 is movably connected to the pump base 1 through a connecting ear. A connecting ring 103 is installed at the upper end of the shock absorber 102. The upper end of the shock absorber 102 is movably connected to the retaining frame 101 through the connecting ring 103. Hydraulic oil is provided inside the shock absorber 102. When the centrifugal pump body 4 and the servo motor 2 are working, the overall vibration is limited by the shock absorber 102 under the retaining frame 101, reducing the vibration amplitude and keeping the position of the centrifugal pump body 4 stable.

[0026] A drainage pipe 401 is provided at the front end of the centrifugal pump body 4, and a water suction pipe 402 is installed above the centrifugal pump body 4. When the centrifugal pump body 4 is working, the servo motor 2 drives the transmission shaft 201 to drive the impeller inside the centrifugal pump body 4 to rotate, performing double-suction pumping.

[0027] Specifically, when the centrifugal pump body 4 is working, the servo motor 2 drives the transmission shaft 201 to drive the impeller inside the centrifugal pump body 4 to rotate, and performs double-suction pumping. During work, the coupling 3 is used to keep the position of the transmission shaft 201 stable, and the lower end of the coupling 3 is connected to the middle upper end of the retaining frame 101 through the support frame 301 and the high-pressure spring 302. When the centrifugal pump body 4 and the servo motor 2 are working, the overall vibration is limited by the shock absorber 102 under the retaining frame 101, thereby reducing the vibration amplitude and keeping the position of the centrifugal pump body 4 stable.

[0028] In order to solve the problem that the motor shaft connection between the horizontal motor and the centrifugal pump is easily affected by vibration and causes instability during actual use of the existing centrifugal pump, please refer to Figure 1 - Figure 3 , this embodiment provides the following technical solutions:

[0029] One end of the coupling 3 is fixedly connected to the centrifugal pump body 4, and the lower end of the coupling 3 is welded to the support frame 301. A high-pressure spring 302 is installed below the support frame 301. The high-pressure spring 302 is fixedly connected to the support frame 301 and the retaining frame 101 respectively. The centrifugal pump body 4 is fixedly connected to one end of the retaining frame 101. The coupling 3 and the support frame 301 are supported by the high-pressure spring 302 to keep the position of the coupling 3 stable, reduce the wear of the transmission shaft 201, prevent the deformation of the rotating shaft caused by shaking, and improve the work quality.

[0030] The lower end of the servo motor 2 is fixedly connected to the pump base 1. A transmission shaft 201 is installed at one end of the servo motor 2. The transmission shaft 201 is connected to the motor shaft of the servo motor 2. The servo motor 2 drives the transmission shaft 201 to drive the impeller inside the centrifugal pump body 4 to rotate, thereby performing double-suction pumping.

[0031] A centrifugal impeller is installed inside the centrifugal pump body 4, and a shaft sleeve is provided inside the coupling 3. The transmission shaft 201 passes through the coupling 3 and is rotatably connected to the coupling 3 through the shaft sleeve, and the transmission shaft 201 passes through the coupling 3 and is fixedly connected to the centrifugal impeller. The position of the transmission shaft 201 and the centrifugal impeller is kept stable by the coupling 3 to adapt to long-term operation.

[0032] Specifically, the vibration generated by the centrifugal pump body 4 during long-term operation can be limited by the shock absorber 102 under the retaining frame 101, and then the coupling 3 and the support frame 301 are supported by the high-pressure spring 302 to keep the position of the coupling 3 stable, reduce the wear of the transmission shaft 201, prevent the deformation of the rotating shaft caused by the vibration, and improve the work quality.

[0033] Working principle: When in use, the servo motor 2 drives the transmission shaft 201 to drive the impeller inside the centrifugal pump body 4 to rotate and perform double-suction pumping. During operation, the coupling 3 is used to keep the position of the transmission shaft 201 stable, and the lower end of the coupling 3 is connected to the middle upper end of the retaining frame 101 through the support frame 301 and the high-pressure spring 302. When the centrifugal pump body 4 and the servo motor 2 are working, the overall vibration is limited by the shock-absorbing damper 102 under the retaining frame 101 to reduce the vibration amplitude and keep the position of the centrifugal pump body 4 stable. It can be limited by the shock-absorbing damper 102 under the retaining frame 101, and then the coupling 3 and the support frame 301 are supported by the high-pressure spring 302 to keep the position of the coupling 3 stable, reduce the wear of the transmission shaft 201, prevent the shaft from being deformed due to vibration, and improve the work quality.

[0034] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A horizontal single-stage double-suction centrifugal pump, comprising a pump base (1), characterized in that: A retaining frame (101) is installed on one side of the pump base (1), a centrifugal pump body (4) is installed above the retaining frame (101), a servo motor (2) is installed on the upper end of the other side of the pump base (1), a coupling (3) is installed between the servo motor (2) and the pump base (1), and a support frame (301) is installed between the coupling (3) and the retaining frame (101).

2. A horizontal single-stage double-suction centrifugal pump according to claim 1, characterized in that: A hinge is installed between the pump base (1) and the retaining frame (101), and one end of the retaining frame (101) is movably connected to the pump base (1) through the hinge.

3. A horizontal single-stage double-suction centrifugal pump according to claim 1, characterized in that: A damper (102) is installed at the other end of the retaining frame (101), the lower end of the damper (102) is movably connected to the pump base (1) via a connecting ear, a connecting collar (103) is installed at the upper end of the damper (102), the upper end of the damper (102) is movably connected to the retaining frame (101) via the connecting collar (103), and hydraulic oil is provided inside the damper (102).

4. A horizontal single-stage double-suction centrifugal pump according to claim 1, characterized in that: The lower end of the servo motor (2) is fixedly connected to the pump base (1); one end of the servo motor (2) is mounted with a transmission shaft (201); the transmission shaft (201) is in transmission connection with the motor shaft of the servo motor (2).

5. A horizontal single-stage double-suction centrifugal pump according to claim 4, characterized in that: A centrifugal impeller is installed inside the centrifugal pump body (4), a shaft sleeve is provided inside the coupling (3), the transmission shaft (201) passes through the coupling (3) and is rotationally connected to the coupling (3) via the shaft sleeve, and the transmission shaft (201) passes through the coupling (3) and is fixedly connected to the centrifugal impeller.

6. A horizontal single-stage double-suction centrifugal pump according to claim 1, characterized in that: One end of the coupling (3) is fixedly connected to the centrifugal pump body (4), the lower end of the coupling (3) is welded to the support frame (301), a high-pressure spring (302) is installed below the support frame (301), the high-pressure spring (302) is fixedly connected to the support frame (301) and the retaining frame (101), respectively, and the centrifugal pump body (4) is fixedly connected to one end of the retaining frame (101).

7. A horizontal single-stage double-suction centrifugal pump according to claim 1, characterized in that: A drainage pipe (401) is provided at the front end of the centrifugal pump body (4), and two water pumping pipes (402) are installed above the centrifugal pump body (4).

Images