A water baffle for a multistage centrifugal pump

Abstract

This utility model provides a water baffle ring for a multi-stage centrifugal pump, relating to the technical field of centrifugal pump water baffle rings. It includes a rotating shaft and an installation mechanism. A sealing ring is fitted onto the outer side of the rotating shaft, and an inner ring is fixedly connected to one side of the sealing ring. A connecting groove is formed between the sealing ring and the inner ring. A connecting block is connected to the inner side of the connecting groove via a threaded connection. An installation mechanism is fixedly connected to one side of the connecting block. A rotating block is mounted on the rotating shaft via two installation blocks. A first installation layer seals the contact surface between the rotating block and the rotating shaft. The sealing ring completes the seal between the installation block and the rotating shaft. The rotating block, made of polytetrafluoroethylene, combined with the two installation blocks to form a double-layer structure provides an elastic seal, adapting to the vibration and thermal expansion of the pump shaft. This device, through multi-layer sealing, has good water-blocking performance, preventing liquid from passing through the gaps in the rotating shaft during operation and avoiding damage to the machine. Simultaneously, it adapts to the vibration and thermal expansion of the pump shaft, resulting in low wear and a long service life.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump baffle ring technology, and in particular to a baffle ring for a multi-stage centrifugal pump. Background Technology

[0002] During operation, liquid can easily leak through the gap between the impeller and guide vane into the bearing area of ​​a multistage centrifugal pump, leading to reduced efficiency, bearing corrosion, and poor lubrication. Traditional baffles are mostly made of a single material, resulting in limited sealing performance, severe wear, and difficulty in adapting to the thermal expansion and vibration of the pump shaft, leading to short service life and high maintenance costs. Therefore, there is an urgent need for a new type of baffle to improve sealing performance, wear resistance, and adaptability, extend service life, and reduce maintenance costs.

[0003] A search revealed that patent number "CN218325444U" discloses a pump baffle ring comprising a first baffle plate, a second baffle plate, a first fixed cylinder, a second fixed cylinder, a first connecting plate, and a second connecting plate. The first fixed cylinder and the second fixed cylinder together form a fixed cylinder for fixing to the outer periphery of a pump shaft. The first baffle plate is located on the outer periphery of the first fixed cylinder, and the second baffle plate is located on the outer periphery of the second fixed cylinder. The first baffle plate and the second baffle plate together form a baffle plate. The number of first connecting plates is two, and the two first connecting plates are positioned... On both sides of the first fixed cylinder, there are two second connecting plates, located on both sides of the second fixed cylinder. The first and second water-baffle plates are provided with arc-shaped water-guiding grooves extending outward from the fixed cylinder. This technical solution addresses the problem of difficult disassembly and assembly of existing pump water-baffle rings. During use, water is guided through the arc-shaped water-guiding grooves, and the water-baffle ring is fixed using the first and second connecting plates, simplifying disassembly and assembly. However, during use, the water-baffle ring experiences significant friction with the rotating shaft and the centrifugal pump mounting point, leading to easy wear and a short service life.

[0004] Therefore, we provide a baffle ring for a multi-stage centrifugal pump to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a water baffle ring for a multi-stage centrifugal pump, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a water baffle for a multi-stage centrifugal pump, comprising a rotating shaft and an installation mechanism, wherein a sealing ring is sleeved on the outer side of the rotating shaft, an inner ring is fixedly connected to one side of the sealing ring, a connecting groove is formed between the sealing ring and the inner ring, a connecting block is connected to the inner side of the connecting groove by a thread, and an installation mechanism is fixedly connected to one side of the connecting block;

[0007] The installation mechanism includes an installation component and a rotating component. The installation component is fixedly connected to one side of the connecting block, and the rotating component is provided on the outside of the installation component.

[0008] Preferably, the mounting component includes a mounting block, a first mounting layer, a second mounting layer, a third mounting layer, an inner clip layer, and a bottom ring. The connecting block is fixedly connected to the mounting block, and the outer side of the mounting block is sequentially divided into the first mounting layer, the second mounting layer, and the third mounting layer.

[0009] Preferably, the outer diameters of the first mounting layer, the second mounting layer, and the third mounting layer are arranged in descending order.

[0010] Preferably, the inner side of the mounting block is provided with an inner card layer, which has a central cross-section and arc-shaped structures at both ends.

[0011] Furthermore, a bottom ring is formed on the inner side of the connecting block, and the shape of the bottom ring matches that of the inner ring.

[0012] Preferably, the rotating assembly includes an outer clamping layer, a clamping layer, a rotating block, and a fixing block. The outer clamping layer is formed by cutting the outer side of the second mounting layer, and the clamping layer is provided on the outer side of the outer clamping layer.

[0013] Preferably, the snap-fit ​​layer is disposed on the inner side of the rotating block, and a fixing block is rotatably connected to the outer side of the third mounting layer. The rotating block is made of polytetrafluoroethylene.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The water baffle ring of this multistage centrifugal pump, through the setting of the installation mechanism, completes the installation connection between the rotating block and the rotating shaft by the installation component. The structure is simple and the installation is convenient. The rotating component cooperates with the rotating shaft to make the rotating block rotate. The bottom ring, connecting groove, and thread of the two mounting blocks cooperate with the inner ring to improve the fixation of the sealing ring and prevent the sealing ring from falling off.

[0016] 2. The rotating block is mounted on the rotating shaft using two mounting blocks. The first mounting layer seals the contact surface between the rotating block and the rotating shaft. The sealing ring completes the seal between the mounting block and the rotating shaft. The rotating block, made of polytetrafluoroethylene, forms a double-layer structure with the two mounting blocks, providing an elastic seal that adapts to the vibration and thermal expansion of the pump shaft. This device, through multi-layer sealing, has good water-blocking properties, preventing liquid from passing through the gaps in the rotating shaft during operation and avoiding damage to the machine. At the same time, it adapts to the vibration and thermal expansion of the pump shaft, resulting in less wear and a long service life. Attached Figure Description

[0017] Figure 1 This is a top view schematic diagram of the external structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the external structure of the present invention from a bottom-view perspective.

[0019] Figure 3 This is a schematic diagram of the external structure of the exploded structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the inner structure of the mounting block of this utility model;

[0021] Figure 5 This is a schematic diagram of the outer side of the mounting block of this utility model;

[0022] Figure 6 This is a schematic diagram of the external structure of the sealing ring of this utility model.

[0023] The following are the labeling elements in the diagram: 1. Rotating shaft; 2. Sealing ring; 3. Inner ring; 4. Connecting groove; 5. Thread; 6. Connecting block; 7. Mounting mechanism; 71. Mounting assembly; 711. Mounting block; 712. First mounting layer; 713. Second mounting layer; 714. Third mounting layer; 715. Inner locking layer; 716. Bottom ring; 72. Rotating assembly; 721. Outer locking layer; 722. Snap-fit ​​layer; 723. Rotating block; 724. Fixing block. Detailed Implementation

[0024] Please see Figure 1-6 This utility model provides a technical solution: a water baffle for a multi-stage centrifugal pump, including a rotating shaft 1 and an installation mechanism 7. A sealing ring 2 is sleeved on the outer side of the rotating shaft 1. An inner ring 3 is fixedly connected to one side of the sealing ring 2. A connecting groove 4 is formed between the sealing ring 2 and the inner ring 3. A connecting block 6 is connected to the inner side of the connecting groove 4 through a threaded wire 5. An installation mechanism 7 is fixedly connected to one side of the connecting block 6. The installation mechanism 7 includes an installation component 71 and a rotating component 72. The installation component 71 is fixedly connected to one side of the connecting block 6, and the rotating component 72 is provided on the outer side of the installation component 71.

[0025] Furthermore, the mounting component 71 includes a mounting block 711, a first mounting layer 712, a second mounting layer 713, a third mounting layer 714, an inner retaining layer 715, and a bottom ring 716. The connecting block 6 is fixedly connected to the mounting block 711. The outer side of the mounting block 711 is sequentially divided into the first mounting layer 712, the second mounting layer 713, and the third mounting layer 714. The outer diameters of the first mounting layer 712, the second mounting layer 713, and the third mounting layer 714 are arranged in descending order. The second mounting layer 713 fixes the rotating block 723, and the first mounting layer 712 fits against the rotating block 723 to fix and limit the rotating block 723.

[0026] Furthermore, an inner locking layer 715 is provided on the inner side of the mounting block 711. The inner locking layer 715 has a middle cross-section and arc-shaped structures at both ends. The inner locking layer 715 allows the mounting block 711 to be locked onto the rotating shaft 1, so that the mounting block 711 rotates with the rotating shaft 1.

[0027] Furthermore, a bottom ring 716 is formed on the inner side of the connecting block 6. The bottom ring 716 matches the shape of the inner ring 3. The bottom ring 716 fits into the inner ring 3 to fix the inner ring 3, so that the sealing ring 2 is tightly fixed to the mounting block 711.

[0028] Furthermore, the rotating assembly 72 includes an outer locking layer 721, a locking layer 722, a rotating block 723, and a fixing block 724. The outer locking layer 721 is formed by cutting the outer side of the second mounting layer 713. The locking layer 722 is provided on the outer side of the outer locking layer 721. The outer locking layer 721 and the locking layer 722 cooperate to make the rotating block 723 rotate with the rotating shaft 1.

[0029] Furthermore, the snap-fit ​​layer 722 is disposed on the inner side of the rotating block 723, and the fixing block 724 is rotatably connected to the outer side of the third mounting layer 714. The rotating block 723 is made of polytetrafluoroethylene (PTFE), and the fixing block 724 is threadedly connected to the outer side of the third mounting layer 714 to fix and limit the rotating block 723. PTFE has good self-lubricating properties, low friction, heat resistance, corrosion resistance, and a certain degree of elasticity, which can provide elastic sealing and adapt to the vibration and thermal expansion of the pump shaft.

[0030] Working principle: First, the water baffle ring for a multi-stage centrifugal pump is moved to the working position. Firstly, the sealing ring 2 is threaded onto the rotating shaft 1, and two mounting blocks 711 are installed onto the sealing ring 2. Secondly, during installation, the connecting block 6 is inserted into the sealing ring 2, and the sealing ring 2 is rotated to fix the mounting block 711 to the sealing ring 2. Thirdly, the position of the rotating block 723 is adjusted, and the rotating block 723 is fitted onto the mounting block 711. Fourthly, the fixing block 724 is fitted onto the rotating shaft 1, and the fixing block 724 is screwed to connect to the third mounting layer 714. Fifthly, the rotating block 723 is installed onto the centrifugal pump. The sealing and water baffle operation is completed through the sealing ring 2, the first mounting layer 712, and the rotating block 723. During operation, liquid flows into the machine, thus completing the installation process of the water baffle ring for a multi-stage centrifugal pump.

Claims

1. A baffle ring for a multistage centrifugal pump, comprising a rotating shaft (1) and a mounting mechanism (7), characterized in that: A sealing ring (2) is fitted on the outer side of the rotating shaft (1). An inner ring (3) is fixedly connected to one side of the sealing ring (2). A connecting groove (4) is formed between the sealing ring (2) and the inner ring (3). A connecting block (6) is connected to the inner side of the connecting groove (4) by a thread (5). An installation mechanism (7) is fixedly connected to one side of the connecting block (6). The installation mechanism (7) includes an installation component (71) and a rotating component (72). The installation component (71) is fixedly connected to one side of the connecting block (6), and the rotating component (72) is provided on the outside of the installation component (71).

2. The water baffle ring for a multi-stage centrifugal pump according to claim 1, characterized in that, The mounting assembly (71) includes a mounting block (711), a first mounting layer (712), a second mounting layer (713), a third mounting layer (714), an inner clip layer (715), and a bottom ring (716). The connecting block (6) is fixedly connected to the mounting block (711). The outer side of the mounting block (711) is sequentially divided into the first mounting layer (712), the second mounting layer (713), and the third mounting layer (714).

3. The water baffle ring for a multi-stage centrifugal pump according to claim 2, characterized in that, The outer diameters of the first mounting layer (712), the second mounting layer (713), and the third mounting layer (714) are arranged in descending order.

4. The water baffle ring for a multi-stage centrifugal pump according to claim 2, characterized in that, The inner side of the mounting block (711) is provided with an inner card layer (715), which has a middle cross-section and arc-shaped structures at both ends.

5. A water baffle ring for a multi-stage centrifugal pump according to claim 1, characterized in that, A bottom ring (716) is formed on the inner side of the connecting block (6), and the shape of the bottom ring (716) matches that of the inner ring (3).

6. A water baffle ring for a multi-stage centrifugal pump according to claim 2, characterized in that, The rotating assembly (72) includes an outer locking layer (721), a locking layer (722), a rotating block (723), and a fixing block (724). The outer locking layer (721) is formed by cutting the outer side of the second mounting layer (713), and the locking layer (722) is provided on the outer side of the outer locking layer (721).

7. A water baffle ring for a multi-stage centrifugal pump according to claim 6, characterized in that, The snap-fit ​​layer (722) is disposed on the inner side of the rotating block (723), and the outer side of the third mounting layer (714) is threadedly connected to the fixing block (724). The rotating block (723) is made of polytetrafluoroethylene.

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