Single-stage single-suction horizontal centrifugal pump

Abstract

The utility model provides a single-stage single-suction horizontal centrifugal pump which comprises a base, a driving motor arranged on the base and a water pump assembly with a pump transmission shaft, and an output shaft of the driving motor is connected with the pump transmission shaft through a middle connecting piece. The middle connecting piece is detachably and fixedly connected with an output shaft of the driving motor and the pump transmission shaft, and the middle connecting piece can be moved out in the radial direction of the pump transmission shaft after being detached. According to the centrifugal pump, the labor intensity of operators is reduced, more importantly, the maintenance and overhaul efficiency is improved, and normal and efficient work of the centrifugal pump is guaranteed.

Description

Technical Field

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

[0002] A centrifugal pump generally includes a drive motor and a water pump assembly connected to the drive motor. Its working principle is to use the centrifugal force generated when the drive motor drives the impeller to rotate to transport liquid. Before starting the water pump, the pump casing and the suction pipe must be filled with water, and then the drive motor is started to make the pump shaft drive the impeller and water to rotate at high speed. The water undergoes centrifugal motion and is thrown to the outer edge of the impeller and flows into the water pressure pipeline of the water pump through the flow channel of the volute pump casing.

[0003] The patent with the patent authorization announcement number CN215633823U discloses a horizontal centrifugal pump. The patent uses a driving motor and a centrifugal pump to transport the raw materials through a raw material pipe to a filter box, and the raw materials are filtered through the filter screens A and B inside the filter box. After the raw materials are filtered, they are transported to the liquid outlet pipe for discharge. During the transportation, the coolant is transported to the spiral cooling pipe through the circulating pump and the water inlet pipe, and the centrifugal pump is cooled through the spiral cooling pipe. At the same time, the heat dissipation motor is started to drive the fan to rotate, and the coolant is cooled by the fan. However, the centrifugal pump provided by the patent still has shortcomings in actual use. When the pump body, such as the impeller, needs to be inspected or repaired, the water pump assembly needs to be disassembled from the driving motor as a whole before it can be repaired or inspected. Such an operation method is time-consuming and labor-intensive, and seriously affects the working efficiency of the horizontal centrifugal pump. Utility Model Content

[0004] In order to overcome the shortcomings of the existing patents, the applicant provides a single-stage single-suction horizontal centrifugal pump, which overcomes the shortcomings of the prior art and improves work efficiency.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the utility model provides the following technical solution: a single-stage single-suction horizontal centrifugal pump, comprising a base, a driving motor arranged on the base and a water pump assembly with a pump drive shaft, the output shaft of the driving motor and the pump drive shaft are connected by an intermediate connecting piece, the intermediate connecting piece and the output shaft of the driving motor and the pump drive shaft are all detachably fixedly connected, and when the intermediate connecting piece is removed, it can be moved out along the radial direction of the pump drive shaft.

[0006] As a further preferred technical solution of the present utility model, the intermediate connecting member includes an intermediate body and end flanges located at both ends of the intermediate body, a pump end flange is fixed on the pump drive shaft, a motor end flange is fixed on the output shaft of the drive motor, and the two end flanges are respectively screwed and fixed to the pump end flange and the motor end flange.

[0007] The pump end flange and the pump transmission shaft as well as the motor end flange and the drive motor output shaft are all key-connected.

[0008] As a further preferred technical solution of the present utility model, the water pump assembly also includes a pump casing, an impeller arranged in the pump casing, and a detachable part detachably fixedly connected to the pump casing, and the impeller is fixedly connected to the pump drive shaft.

[0009] As a further preferred technical solution of the utility model, the detachable part includes a pump cover screwed and fixed to the pump casing, a suspension body fixedly connected to the pump cover, a first sealing ring arranged in the pump cover for sealing the pump drive shaft, a first bearing and a second bearing arranged in the suspension body and cooperating with the pump drive shaft.

[0010] As a further preferred technical solution of the present utility model, the end of the suspension body is screwed and fixed with a second limiting end cover for limiting the second bearing and a first limiting end cover for limiting the first bearing.

[0011] As a further preferred technical solution of the present utility model, both the first limiting end cover and the second limiting end cover are provided with limiting protrusions.

[0012] As a further preferred technical solution of the present utility model, both the first limiting end cover and the second limiting end cover are provided with a mounting groove, and a second sealing ring is provided in the mounting groove.

[0013] As a further preferred technical solution of the utility model, a support frame for supporting the suspension body is provided on the base, and the support frame and the suspension body are screwed and fixed.

[0014] Beneficial effects:

[0015] The utility model not only reduces the labor intensity of operators, but more importantly improves the efficiency of maintenance and overhaul, thereby ensuring the normal and efficient operation of the centrifugal pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a schematic diagram of the connection between the suspension body and the pump drive shaft in the utility model. DETAILED DESCRIPTION

[0018] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention.

[0019] Example, see attached Figure 1-2A single-stage single-suction horizontal centrifugal pump comprises a base 1, a driving motor 2 arranged on the base 1 and a water pump assembly 3 with a pump transmission shaft 31. The driving motor is screwed and fixed on the base 1, and the water pump assembly is connected to the driving motor. The output shaft of the driving motor 2 and the pump transmission shaft 31 are connected through an intermediate connecting member 4. The intermediate connecting member 4 and the output shaft of the driving motor 2 and the pump transmission shaft 31 are all detachably fixedly connected. When the intermediate connecting member 4 is disassembled, it can be moved out along the radial direction of the pump transmission shaft 31, so that a disassembly space can be formed. In this embodiment, the intermediate connecting member 4 includes an intermediate body 41 and a The end flanges 42 at both ends of the intermediate body 41, the pump end flanges 311 are fixed on the pump transmission shaft 31, and the motor end flanges 11 are fixed on the output shaft of the drive motor 2. The two end flanges 42 are respectively screwed and fixed to the pump end flanges 311 and the motor end flanges 11. The screwing fixation here can be a screw fixation or a bolt and nut fixation mode. Because this is a very conventional connection method in the mechanical field, it will not be described in detail here. At the same time, the pump end flange 311 and the pump transmission shaft 31 as well as the motor end flange 11 and the output shaft of the drive motor 2 are all keyed, generally using a flat key.

[0020] In this embodiment, the water pump assembly 3 also includes a pump casing 32, an impeller 33 arranged in the pump casing 32, and a detachable part 34 detachably fixedly connected to the pump casing 32. The impeller 33 is fixedly connected to the pump drive shaft 31, and a limit nut for limiting the position of the impeller 33 is threaded at the end of the pump drive shaft. The impeller and the pump drive shaft are generally connected by a flat key.

[0021] In this embodiment, the detachable part 34 includes a pump cover 341 screwed to the pump casing 32, a suspension body 342 fixedly connected to the pump cover 341, a first sealing ring 343 arranged in the pump cover 341 for sealing the pump drive shaft 31, a first bearing 344 and a second bearing 345 arranged in the suspension body 342 and matching with the pump drive shaft 31. The pump cover is fixedly connected to the pump casing by screws for easy disassembly, and a sealing ring is provided between the pump cover and the pump casing for sealing.

[0022] Such a structure has changed the previous structure and the previous disassembly mode. By disassembling the intermediate connecting part and then moving it out radially along the pump drive shaft 31, a disassembly space will appear. The existence of this disassembly space allows us to repair or overhaul the water pump by only removing the pump cover (the pump cover and pump casing are screwed together for easy disassembly). The components including the pump drive shaft and impeller can be moved out along the axial direction of the pump drive shaft for repair. Therefore, at this time, the moving space distance required for the impeller to remove the pump casing must be smaller than the disassembly space distance to ensure that the impeller can be smoothly moved out along the axial direction. This eliminates the need to separate the water pump assembly and the channel motor as a whole before disassembling the water pump assembly. This not only greatly reduces the workload of the operator, but more importantly, saves a lot of time and ensures the efficient operation of the entire centrifugal pump!

[0023] Furthermore, the end of the suspension body 342 is screwed with a second limiting end cover 346 for limiting the second bearing 345 and a first limiting end cover 347 for limiting the first bearing 344. The first limiting end cover is fixedly connected to the suspension body by screws. At the same time, in order to facilitate the installation of the first limiting end cover, a mounting end surface that cooperates with the first limiting end cover is provided inside the suspension body. The first limiting end cover 347 and the second limiting end cover 346 are both provided with limiting protrusions 348, which are in contact with the first bearing and the second bearing, thereby achieving limiting.

[0024] Furthermore, in order to improve work efficiency, both the first limiting end cover 347 and the second limiting end cover 346 are provided with a mounting groove, and a second sealing ring 349 is provided in the mounting groove.

[0025] Furthermore, in order to improve work efficiency, a support frame 5 for supporting the suspension body 342 is provided on the base 1, and the support frame 5 and the suspension body 342 are screwed and fixed.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A single-stage single-suction horizontal centrifugal pump, comprising a base (1), a drive motor (2) arranged on the base (1), and a water pump assembly (3) with a pump drive shaft (31), characterized in that: The output shaft of the drive motor (2) and the pump transmission shaft (31) are connected via an intermediate connecting member (4); the intermediate connecting member (4) and the output shaft of the drive motor (2) and the pump transmission shaft (31) are all detachably fixedly connected; when the intermediate connecting member (4) is detached, it can be moved out along the radial direction of the pump transmission shaft (31).

2. A single-stage single-suction horizontal centrifugal pump as claimed in claim 1, characterized in that: The intermediate connecting member (4) comprises an intermediate body (41) and end flanges (42) located at both ends of the intermediate body (41); a pump end flange (311) is fixed on the pump transmission shaft (31); a motor end flange (11) is fixed on the output shaft of the drive motor (2); and the two end flanges (42) are respectively screwed and fixed to the pump end flange (311) and the motor end flange (11).

3. A single-stage single-suction horizontal centrifugal pump as claimed in claim 2, characterized in that: The pump end flange (311) and the pump drive shaft (31) as well as the motor end flange (11) and the output shaft of the drive motor (2) are all key-connected.

4. A single-stage single-suction horizontal centrifugal pump as claimed in claim 1, 2 or 3, characterized in that: The water pump assembly (3) further comprises a pump casing (32), an impeller (33) arranged in the pump casing (32), and a detachable portion (34) detachably and fixedly connected to the pump casing (32); the impeller (33) is fixedly connected to the pump transmission shaft (31).

5. A single-stage single-suction horizontal centrifugal pump as claimed in claim 4, characterized in that: The detachable part (34) includes a pump cover (341) screwed and fixed to the pump housing (32), a suspension body (342) fixedly connected to the pump cover (341), a first sealing ring (343) arranged in the pump cover (341) for sealing the pump drive shaft (31), a first bearing (344) and a second bearing (345) arranged in the suspension body (342) and matching with the pump drive shaft (31).

6. A single-stage single-suction horizontal centrifugal pump as claimed in claim 5, characterized in that: The end of the suspension body (342) is screwed and fixed with a second limiting end cover (346) for limiting the second bearing (345) and a first limiting end cover (347) for limiting the first bearing (344).

7. A single-stage single-suction horizontal centrifugal pump as claimed in claim 6, characterized in that: The first limiting end cover (347) and the second limiting end cover (346) are both provided with limiting protrusions (348).

8. A single-stage single-suction horizontal centrifugal pump as claimed in claim 7, characterized in that: The first limiting end cover (347) and the second limiting end cover (346) are both provided with a mounting groove, and a second sealing ring (349) is provided in the mounting groove.

9. A single-stage single-suction horizontal centrifugal pump as claimed in claim 5, characterized in that: A support frame (5) on the base (1) is used to support the suspension body (342).

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