Double-suction centrifugal pump convenient to disassemble

Abstract

The utility model discloses a double suction centrifugal pump convenient to disassemble, which comprises a device body, a pump body is arranged in the device body, a pump cover is arranged on the pump body, one end of the pump body is connected with a shaft, a machine seal body is arranged in the pump cover, a machine seal is arranged in the machine seal body, a bearing body is sleeved outside the shaft, and the bearing body is connected with a bearing. The bearing body comprises an outer bearing body and an inner bearing body, bearings are installed in the outer bearing body and the inner bearing body, a pump coupler is installed at one end of the shaft, an electric coupler is arranged on one side of the pump coupler, a middle coupler is installed between the pump coupler and the electric coupler, the mechanical seal is sleeved with a mechanical seal shaft sleeve, and the mechanical seal shaft sleeve is movably connected with the mechanical seal. The mechanical seal of the device can be disassembled and assembled according to the needs of a user, the practicability and convenience of the device are improved, the disassembling and assembling efficiency of the device is improved, damage to a bearing and a shaft is reduced, and the problem that the device needs to be integrally disassembled when the mechanical seal is replaced traditionally is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of centrifugal pumps, and particularly relates to a detachable double-suction centrifugal pump. Background Technique

[0002] A centrifugal pump works by using the rotation of an impeller to cause the water to undergo centrifugal motion. Before starting the pump, the pump casing and the suction pipe must be filled with water. Then, the motor is started, and the pump shaft drives the impeller and the water to rotate at a high speed. The water undergoes centrifugal motion and is thrown to the outer edge of the impeller, and then flows into the pressure water pipe of the pump through the flow channel of the volute pump casing. There are various types of centrifugal pumps, such as double-suction centrifugal pumps and single-suction centrifugal pumps.

[0003] A double-suction centrifugal pump is a power device for conveying, which conveys clear water or other liquids with physical and chemical properties similar to water. According to user requirements, by changing the pump structure and material, it can be used to convey clear water without solid particles or other liquids with physical and chemical properties similar to water, and is suitable for fields such as factories, cities, mines, power stations, farmlands, and water conservancy projects. The temperature of the conveyed medium is 0°C to 80°C, and the maximum allowable inlet pressure is 0.6 MPa.

[0004] For the existing double-suction centrifugal pump, the mechanical seal inside the device needs to be replaced during later maintenance. The bearing body of the conventional double-suction centrifugal pump is integral. To replace the mechanical seal, almost the entire bare pump needs to be disassembled. First, the pump cover is removed, the connection bolts of the bearing body and the pin of the coupling are removed, the entire rotor component is removed, the pump coupling is pulled out, and the bearing body and the bearing are removed before the mechanical seal can be replaced. As we all know, when the bearing is pulled off the shaft, the shaft may be scratched. The bearing and the shaft have a small interference fit, so the probability of replacing the shaft and the bearing is greatly increased. This not only wastes time but also easily damages the bearing and the shaft. Therefore, we need to upgrade and transform on the basis of the existing technology. Content of the Utility Model

[0005] The purpose of the utility model is to provide a detachable double-suction centrifugal pump to solve the problems raised in the above background technique.

[0006] To solve the above problems, the following technical solutions are provided:

[0007] Design a detachable double-suction centrifugal pump, including a device body. The device body contains a pump body. A pump cover is arranged on the pump body, and one end of the pump body is connected to a shaft. A mechanical seal body is arranged inside the pump cover, and a mechanical seal is arranged inside the mechanical seal body. A bearing body is sleeved outside the shaft. The bearing body contains an outer bearing body and an inner bearing body. Bearings are installed inside the outer bearing body and the inner bearing body. One end of the shaft is installed with a pump coupling. There is an electric coupling on one side of the pump coupling, and an intermediate coupling is installed between the pump coupling and the electric coupling.

[0008] Further, one end of the electric coupling is connected to a motor, and a base is arranged below the motor.

[0009] Furthermore, a mechanical seal shaft sleeve is sleeved on the mechanical seal, and the mechanical seal shaft sleeve is movably connected to the mechanical seal.

[0010] Furthermore, a mechanical seal gland is fixedly sleeved outside the mechanical seal, and the mechanical seal gland is screwed and fixed to the pump body.

[0011] Furthermore, a bearing shaft sleeve is sleeved on the bearing, and the bearing shaft sleeve is movably connected to the bearing.

[0012] Furthermore, a bearing gland is installed at the upper end of the bearing, and the bearing gland is fixedly connected to the bearing.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. By providing an intermediate coupling, a pump coupling, an inner bearing body, a mechanical seal shaft sleeve, a bearing shaft sleeve and an outer bearing body, the present utility model can disassemble and assemble the mechanical seal of the device according to the needs of users, increasing the practicability and convenience of the device, improving the disassembly and assembly efficiency of the device, reducing the damage of the bearing and the shaft, and avoiding the problem of overall disassembly of the device required for traditional mechanical seal replacement.

[0015] Referring to the following description and drawings, specific embodiments of the present utility model are disclosed in detail, indicating the ways in which the principles of the present utility model can be adopted. It should be understood that the embodiments of the present utility model are not limited in scope thereby. Within the spirit and terms of the appended claims, the embodiments of the present utility model include many changes, modifications and equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification, and are used together with the embodiments of the present utility model to explain the present utility model, but do not constitute a limitation to the present utility model. In the drawings:

[0017] Figure 1 is a three-dimensional view of the overall structure of a detachable double-suction centrifugal pump according to the present utility model;

[0018] Figure 2 is a cross-sectional view of the internal structure of a detachable double-suction centrifugal pump according to the present utility model;

[0019] Figure 3 is a working diagram of the internal structure of a detachable double-suction centrifugal pump according to the present utility model.

[0020] In the figure: 1. Device body; 2. Pump cover; 3. Mechanical seal body; 4. Mechanical seal; 5. Mechanical seal gland; 6. Bearing gland; 7. Bearing; 8. Bearing body; 9. Pump body; 10. Pump coupling; 11. Shaft; 12. Electrical coupling; 13. Intermediate coupling; 14. Inner bearing body; 15. Mechanical seal shaft sleeve; 16. Bearing shaft sleeve; 17. Outer bearing body; 18. Motor. Specific embodiments

[0021] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] As Figure 1 - Figure 3 shown, a detachable double-suction centrifugal pump provided in this embodiment includes a device body 1. The device body 1 contains a pump body 9. A pump cover 2 is provided on the pump body 9, and one end of the pump body 9 is connected to a shaft 11. A mechanical seal body 3 is provided inside the pump cover 2, and a mechanical seal 4 is provided inside the mechanical seal body 3. A bearing body 8 is sleeved outside the shaft 11. The bearing body 8 contains an outer bearing body 17 and an inner bearing body 14. Bearings 7 are installed inside the outer bearing body 17 and the inner bearing body 14. A pump coupling 10 is installed at one end of the shaft 11. An electrical coupling 12 is provided on one side of the pump coupling 10, and an intermediate coupling 13 is installed between the pump coupling 10 and the electrical coupling 12.

[0023] Preferably, one end of the electrical coupling 12 is connected to a motor 18. A base is provided below the motor 18. By connecting to the motor 18, the intimacy and connection between devices are increased, and the safety of the device during use is ensured. A mechanical seal shaft sleeve 15 is sleeved on the mechanical seal 4, and the mechanical seal shaft sleeve 15 is movably connected to the mechanical seal 4. By providing the mechanical seal shaft sleeve 15, it can prevent high-pressure liquid from leaking out of the pump and prevent air from entering the pump, ensuring the safe operation of the device. A mechanical seal gland 5 is fixedly sleeved outside the mechanical seal 4, and the mechanical seal gland 5 is screwed and fixed to the pump body 9, increasing the sealing performance and safety of the device and preventing fluid from leaking out of the device.

[0024] Preferably, a bearing shaft sleeve 16 is sleeved on the bearing 7, and the bearing shaft sleeve 16 is movably connected to the bearing 7, which can reduce the contact area between the shaft 11 and the outside metal, reduce the wear degree of the shaft 11, and effectively extend the service life of the shaft 11. A bearing gland 6 is installed at the upper end of the bearing 7, and the bearing gland 6 is fixedly connected to the bearing 7, facilitating the subsequent installation and fixation of the bearing 7 by the user and increasing the practicality and convenience of the device.

[0025] The working principle and process of the present utility model are as follows: During use, by adding the intermediate coupling 13, there is sufficient space to remove components such as the pump coupling 10 and the inner bearing housing 14 without having to move the pump body 9, the pump cover 2, and the motor 18. When the mechanical seal 4 of the device needs to be disassembled, simply remove the intermediate coupling 13, then remove the pump coupling 10 and the inner bearing housing 14. At this time, the bearing 7 and the bearing sleeve 16 are removed together as a whole, ensuring that the bearing 7 and the bearing sleeve 16 are not scratched. The outer bearing housing 17 remains in its original state, and the mechanical seal gland 5 and the mechanical seal sleeve 15 can be taken out from its inner hole. In this way, replacing the mechanical seal 4 becomes extremely simple, and it can be ensured that the shaft 11 and the bearing 7 are both intact. Conversely, the device can be installed. The mechanical seal 4 of the device can be disassembled and assembled according to the needs of the user, increasing the practicality and convenience of the device, improving the disassembly and assembly efficiency of the device, reducing the damage to the bearing 7 and the shaft 11, and avoiding the problem of having to disassemble the entire device when replacing the traditional mechanical seal.

[0026] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] The above describes the present utility model in combination with specific embodiments, but those skilled in the art should clearly understand that these descriptions are exemplary and not a limitation of the protection scope of the present utility model. Those skilled in the art can make various modifications and variations to the present utility model according to the spirit and principle of the present utility model, and these modifications and variations are also within the scope of the present utility model.

Claims

1. A detachable double-suction centrifugal pump, characterized in that: The invention comprises a device body (1), wherein the device body (1) contains a pump body (9), a pump cover (2) is arranged on the pump body (9), and one end of the pump body (9) is connected to a shaft (11), a mechanical seal body (3) is arranged in the pump cover (2), a mechanical seal (4) is arranged in the mechanical seal body (3), a bearing body (8) is arranged on the outer sleeve of the shaft (11), the bearing body (8) contains an outer bearing body (17) and an inner bearing body (14), bearings (7) are installed in the outer bearing body (17) and the inner bearing body (14), a pump link (10) is installed on one end of the shaft (11), an electric link (12) is arranged on one side of the pump link (10), and an intermediate link (13) is installed between the pump link (10) and the electric link (12).

2. A detachable double-suction centrifugal pump according to claim 1, characterized in that: One end of the electric link (12) is connected to a motor (18), and a base is provided below the motor (18).

3. A detachable double-suction centrifugal pump according to claim 1, characterized in that: The mechanical seal (4) is sleeved with a mechanical seal shaft sleeve (15), and the mechanical seal shaft sleeve (15) is movably connected to the mechanical seal (4).

4. A detachable double-suction centrifugal pump according to claim 1, characterized in that: The outer fixed sleeve of the mechanical seal (4) is provided with a mechanical seal gland (5), and the mechanical seal gland (5) is screwed and fixed to the pump body (9).

5. The detachable double-suction centrifugal pump according to claim 1, characterized in that: A bearing sleeve (16) is sleeved on the bearing (7), and the bearing sleeve (16) is movably connected to the bearing (7).

6. A detachable double-suction centrifugal pump according to claim 1, characterized in that: A bearing pressure cover (6) is installed on the upper end of the bearing (7), and the bearing pressure cover (6) is fixedly connected to the bearing (7).

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