Double-suction centrifugal pump

Abstract

The utility model discloses a double-suction centrifugal pump which comprises a pump shell, a pump shaft is arranged in the pump shell, two impellers are symmetrically arranged at the center of the pump shaft in a mutually deviating mode, a shaft sleeve matched with the impellers is arranged on the side wall of the pump shaft, a sealing ring matched with the impellers is arranged in the pump shell, and a sealing rotating seat is arranged on the shaft sleeve. The utility model relates to the technical field of centrifugal pumps, the filter plates are arranged in the pump shell and located at the water inlet ends of the two sides of the impeller, the pump shaft drives the cleaning assembly to clean the filter plates, the filter plates are arranged in the pump shell and located at the water inlet ends of the two sides of the impeller, and the cleaning assembly is arranged at the end, away from the impeller, of the shaft sleeve. The problem that the impeller is blocked due to the fact that blockages enter the impeller is effectively solved, and the water outlet stability of the double-suction centrifugal pump is guaranteed.

Description

Technical Field

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

[0002] The centrifugal pump works by using the rotation of the impeller to make the water centrifugal. Before starting the water pump, the pump casing and the water suction pipe must be filled with water, and then the motor is started, so that the pump shaft drives 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] However, in actual use, the impeller may be blocked by a blockage, resulting in the double-suction centrifugal pump failing to discharge water. For this reason, a double-suction centrifugal pump is provided. Utility Model Content

[0004] The utility model aims to provide a double-suction centrifugal pump to solve the problem that in actual use, an impeller may be blocked by a blockage, resulting in the double-suction centrifugal pump failing to discharge water.

[0005] In order to achieve the above object, the utility model provides the following technical solution: a double-suction centrifugal pump, comprising:

[0006] Pump housing;

[0007] A pump shaft is arranged inside the pump housing;

[0008] Two impellers are provided, which are symmetrically arranged at the center of the pump shaft and are separated from each other;

[0009] A shaft sleeve, arranged on the side wall of the pump shaft, for fixing the impeller;

[0010] Two sealing rings are provided, which are arranged opposite to each other in the pump housing and are located on the side where the two impellers are away from each other;

[0011] A seal rotating seat, the seal rotating seat is mounted on the shaft sleeve;

[0012] A filter plate, disposed between the sealing rotating seat and the sealing ring;

[0013] The cleaning component is arranged on the shaft sleeve and is used for cleaning the filter plate.

[0014] Preferably, the cleaning assembly comprises a fixing ring fixedly mounted on the shaft sleeve, a plurality of evenly distributed paddles are provided on the side wall of the fixing ring, and bristles matched with the filter plate are provided on the paddles.

[0015] Preferably, the sealing rotating seat comprises a mounting ring rotatably mounted on the shaft sleeve, and a sealing bearing is provided between the mounting ring and the shaft sleeve.

[0016] Preferably, an inner ring mounting seat is provided on the outer wall of the sealing rotating seat, an outer ring mounting seat is provided on the inner wall of the sealing ring, and the filter plate is fixedly mounted between the inner ring mounting seat and the outer ring mounting seat by bolts.

[0017] Preferably, both the outer ring mounting seat and the inner ring mounting seat are provided with an annular sealing groove, and the filter plate is provided with a sealing ring matched with the annular sealing groove.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model is a double-suction centrifugal pump, which arranges filter plates inside the pump casing and at the water inlet ends on both sides of the impeller, and drives the cleaning assembly to clean the filter plates through the pump shaft, thereby effectively avoiding the problem of blockages entering the impeller and causing impeller blockage, thereby ensuring the stability of water discharge from the double-suction centrifugal pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the local enlarged structure at A.

[0021] In the figure: 1. pump casing; 2. pump shaft; 3. impeller; 4. sleeve; 5. sealing ring; 6. sealing rotating seat; 61. mounting ring; 62. sealing bearing; 7. filter plate; 8. cleaning assembly; 81. fixing ring; 82. paddle; 83. bristles; 9. inner ring mounting seat; 10. outer ring mounting seat; 11. annular sealing groove; 12. sealing ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-2The utility model provides a technical solution: a double-suction centrifugal pump, including a pump casing 1, a pump shaft 2 is arranged inside the pump casing 1, and two impellers 3 are symmetrically arranged at the center of the pump shaft 2, which are away from each other. When the double-suction centrifugal pump is started, the built-in pump shaft 2 is driven to rotate by the motor, and the rotating pump shaft 2 drives the impeller 3 to rotate. When the impeller 3 rotates, due to the action of centrifugal force, the fluid is sent to the center of the impeller 3 and flows to the outlet under the push of the blades of the impeller 3. A shaft sleeve 4 adapted to the impeller 3 is arranged on the side wall of the pump shaft 2, and the shaft sleeve 4 is used to fix the impeller 3, so as to protect the impeller 3 from being in the correct position during operation, thereby ensuring the normal operation of the double-suction centrifugal pump. At the same time, the shaft sleeve 4 can reduce the burden of the pump shaft 2 and alleviate the wear and friction generated during long-term operation, thereby protecting the impeller 3 and the pump shaft 2 from wear and corrosion, thereby ensuring the normal operation of the double-suction centrifugal pump. A sealing ring 5 adapted to the impeller 3 is arranged in the pump casing 1, and the sealing ring 5 is used to prevent leakage of the medium in the pump and reduce volume loss , and prolong the service life of the pump, a sealing rotating seat 6 is provided on the shaft sleeve 4, and a filter plate 7 is provided between the sealing rotating seat 6 and the sealing ring 5. The filter plate 7 is in a circular ring shape, and a cleaning component 8 adapted to the filter plate 7 is provided at one end of the shaft sleeve 4 away from the impeller 3. When the double-suction centrifugal pump is started, the built-in pump shaft 2 and the impeller 3 are driven by the motor to rotate, and the suction ports on both sides of the impeller 3 simultaneously inhale the liquid, so that the liquid enters the impeller 3 after being filtered by the filter plate 7, and at the same time, the pump shaft 2 drives the cleaning component 8 to clean the filter plate 7. The liquid forms a centrifugal force under the promotion of the blades of the impeller 3, thereby generating a high-pressure area. The liquid is accelerated in the central part of the impeller 3 and sprayed out to the outside to form a high-speed vortex, and finally discharged through the outlet pipe of the pump. By arranging the filter plate 7 at the water inlet ends on both sides of the impeller 3 in the pump housing 1, and driving the cleaning component 8 to clean the filter plate 7 by the pump shaft 2, the problem of blockages entering the impeller 3 and causing the impeller 3 to be blocked is effectively avoided, and the stability of the water discharge of the double-suction centrifugal pump is ensured.

[0024] Specifically, the cleaning assembly 8 includes a fixing ring 81 fixedly mounted on the shaft sleeve 4, a plurality of evenly distributed paddles 82 are provided on the side wall of the fixing ring 81, and bristles 83 adapted to the filter plate 7 are provided on the paddles 82. When in use, the fixing ring 81 and the paddles 82 are driven to rotate by the pump shaft 2, thereby effectively increasing the flow rate of water entering the impeller 3. At the same time, the paddles 82 drive the bristles 83 to rotate to clean the filter plate 7, thereby realizing that the pump shaft 2 drives the cleaning assembly 8 to clean the filter plate 7, thereby avoiding blockage of the filter plate 7.

[0025] Specifically, the sealing rotating seat 6 includes a mounting ring 61 rotatably mounted on the sleeve 4, and a sealing bearing 62 is provided between the mounting ring 61 and the sleeve 4. The mounting ring 61 is rotatably mounted on the sleeve 4 through the sealing bearing 62, thereby ensuring a sealed rotating connection between the mounting ring 61 and the sleeve 4, and effectively preventing blockages in the liquid from entering the impeller 3 through the gap between the sleeve 4 and the mounting ring 61.

[0026] Specifically, an inner ring mounting seat 9 is provided on the outer wall of the sealing rotating seat 6, and the inner ring mounting seat 9 is adapted to the outer ring side wall of the sealing plate 7. An outer ring mounting seat 10 is provided on the inner wall of the sealing ring 5, and the outer ring mounting seat 10 is adapted to the inner ring side wall of the sealing plate 7. The filter plate 7 is fixedly installed between the inner ring mounting seat 9 and the outer ring mounting seat 10 by bolts, which facilitates the disassembly of the filter plate 7. The filter plate 7 is installed through the inner ring mounting seat 9 and the outer ring mounting seat 10.

[0027] Specifically, an annular sealing groove 11 is provided on the outer ring mounting seat 10 and the inner ring mounting seat 9, and a sealing ring 12 matched with the annular sealing groove 11 is provided on the filter plate 7. When the filter plate 7 is installed, the sealing ring 12 on the filter plate 7 is sealed with the annular sealing groove 11 on the outer ring mounting seat 10 and the inner ring mounting seat 9, thereby preventing blockages in the liquid from entering the impeller 3 through the gap between the filter plate 7 and the outer ring mounting seat 10 and the inner ring mounting seat 9.

[0028] Working principle: When the utility model is working, the motor is first started to drive the built-in pump shaft 2 and impeller 3 to rotate, so that the liquid in the pump casing 1 passes through the filter plates 7 on both sides of the impeller 3 and then sucks the liquid from the suction ports on both sides at the same time. At the same time, the pump shaft 2 drives the cleaning component 8 to clean the filter plate 7. The liquid forms centrifugal force under the push of the impeller 3 blades, thereby generating a high-pressure area. The liquid is accelerated in the center part of the impeller 3 and sprayed out to the outside, forming a high-speed vortex, and is finally discharged through the outlet pipe of the pump.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0031] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-suction centrifugal pump, characterized in that: include: Pump housing (1); A pump shaft (2) is arranged inside the pump housing (1); Two impellers (3) are provided, which are symmetrically arranged away from each other at the center of the pump shaft (2); A shaft sleeve (4) is arranged on the side wall of the pump shaft (2) and is used to fix the impeller (3); Two sealing rings (5) are provided, and are arranged opposite to each other in the pump housing (1) and located on the side of the two impellers (3) that are away from each other; A sealing rotating seat (6) is sealingly rotatably mounted on the shaft sleeve (4); A filter plate (7) is arranged between the sealing rotating seat (6) and the sealing ring (5); A cleaning assembly (8), arranged on the shaft sleeve (4), and used for cleaning the filter plate (7); The cleaning assembly (8) comprises a fixing ring (81) fixedly mounted on the shaft sleeve (4), a plurality of evenly distributed paddles (82) being provided on the side wall of the fixing ring (81), and bristles (83) matching the filter plate (7) being provided on the paddles (82).

2. A double-suction centrifugal pump according to claim 1, characterized in that: The sealing rotating seat (6) comprises a mounting ring (61) rotatably mounted on the shaft sleeve (4), and a sealing bearing (62) is provided between the mounting ring (61) and the shaft sleeve (4).

3. A double-suction centrifugal pump according to claim 1, characterized in that: An inner ring mounting seat (9) is provided on the outer wall of the sealing rotating seat (6), an outer ring mounting seat (10) is provided on the inner wall of the sealing ring (5), and the filter plate (7) is fixedly mounted between the inner ring mounting seat (9) and the outer ring mounting seat (10) by means of bolts.

4. A double-suction centrifugal pump according to claim 3, characterized in that: An annular sealing groove (11) is provided on the outer ring mounting seat (10) and the inner ring mounting seat (9), and a sealing ring (12) matching the annular sealing groove (11) is provided on the filter plate (7).

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