Horizontal multi-stage booster pump stable in operation

Abstract

The utility model provides a horizontal multi-stage booster pump stable in operation, belongs to the field of water pumps, and solves the problems that an impeller and a flow guide shell are abraded and the sealing performance is damaged due to displacement of a pump shaft of an existing booster pump. A bearing end cover is mounted outside the motor; a pump shaft is mounted in the pump body; a thrust pad is mounted on the pump shaft; the rotating shaft is connected with the pump shaft through a spline coupling; a through hole is formed in the flow guide shell, a protection ring is installed in the through hole, a first wrapping part and a second wrapping part are arranged on the protection ring, and a turned-over edge is arranged at the front end of the water inlet joint and faces the impeller. The utility model has the advantages that the abrasion between the impeller and the flow guide shell is reduced by arranging the protective ring; the flange limits the displacement of the impeller; the thrust pad limits the displacement of the pump shaft; and the water retaining ring improves the leakproofness of the rotating shaft and reduces the displacement of the rotating shaft.

Description

Technical Field

[0001] The utility model belongs to the field of water pumps and relates to a booster pump, in particular to a horizontal multi-stage booster pump with stable operation. Background Art

[0002] A booster pump is a water pump that boosts the pressure of liquids. It can effectively increase the pressure of the water flow and facilitate the transportation of water. Its main uses include boosting the pressure of water heaters, low water pressure in high-rise buildings, pressurizing saunas and baths, boosting the water pressure on the top floor of an apartment, automatic boosting with solar energy, boosting the pressure of reverse osmosis water purifiers, etc.

[0003] The multi-stage booster pump has several impellers installed on the pump shaft. During operation, the impeller stirs the water flow and brings it to the outlet. However, while the impeller drives the water flow, the water flow also drives the impeller, so the pump shaft of the booster pump will move forward. Since the impeller is installed on the pump shaft, the movement of the pump shaft will drive the impeller to move in the water inlet section, causing friction between the impeller and the guide shell, causing wear of the impeller and the guide shell, and affecting the water inlet efficiency of the water pump; the movement of the pump shaft will also drive the movement of the rotating shaft. In order to facilitate rotation, a mechanical seal is set on the rotating shaft. The movement of the rotating shaft may cause the seal to fail, causing the motor water inlet to short-circuit. Utility Model Content

[0004] The utility model aims to solve the above problems existing in the prior art and provides a horizontal multi-stage booster pump which has stable operation and reduces the problem of pump shaft movement.

[0005] The utility model can be implemented through the following technical scheme: a horizontal multi-stage booster pump with stable operation, comprising a motor and a pump body, a rotating shaft is installed in the motor, a bearing end cover is installed outside the motor, a pump shaft is installed in the pump body, the rotating shaft is connected to the pump shaft, an impeller is installed on the pump shaft, a water inlet node is arranged outside the impeller, a guide shell is fixed between the water inlet nodes, a through hole is opened on the guide shell, a protective ring is installed in the through hole, and a flange is arranged at the front end of the water inlet node.

[0006] In the above-mentioned horizontal multi-stage booster pump with stable operation, the protective ring is divided into a first covering part and a second covering part, the first covering part covers the lower end surface of the guide shell, and the second covering part covers the inside of the through hole.

[0007] In the above-mentioned horizontal multi-stage booster pump with stable operation, the flange is folded inwardly and faces the impeller.

[0008] In the above-mentioned horizontal multi-stage booster pump with stable operation, a spline is arranged on the connecting end of the rotating shaft, a spline coupling is arranged on the pump shaft and the rotating shaft outer sleeve, and the pump shaft is fixedly connected to the spline coupling by screws.

[0009] In the above-mentioned horizontal multi-stage booster pump with stable operation, a thrust pad is installed on the pump shaft, and the spline coupling is in close contact with the thrust pad.

[0010] In the above-mentioned horizontal multi-stage booster pump with stable operation, a groove is provided in the bearing end cover, and a water retaining ring is installed on the rotating shaft in the groove.

[0011] Compared with the prior art, the advantages of the utility model are: a protective ring is installed in the area that is easy to contact with the impeller, such as the through hole of the guide shell, to prevent the impeller from wearing against the guide shell when the pump shaft moves, causing damage to the guide shell; the flange is used to limit the movement of the impeller when the impeller moves with the pump shaft; a thrust pad is installed on the pump shaft, and a water retaining ring is installed on the rotating shaft to prevent the pump shaft and the rotating shaft from moving. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a cross-sectional view of a horizontal multi-stage booster pump that is running stably.

[0013] Figure 2 yes Figure 1 Enlarged view of the inner circle A;

[0014] Figure 3 yes Figure 1 Enlarged view of inner circle B;

[0015] Figure 4 yes Figure 1 Enlarged view of the inner circle C;

[0016] Among them, 1. motor; 2. pump body; 3. rotating shaft; 31. spline; 4. bearing end cover; 41. groove; 5. pump shaft; 51. screw hole; 6. impeller; 7. water inlet section; 71. flange; 8. guide shell; 81. through hole; 82. protective ring; 821. covering part 1; 822. covering part 2; 9. spline coupling; 10. thrust pad; 11. water retaining ring; 12. screw. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0018] like Figures 1 to 4 As shown, the utility model can be implemented through the following embodiments: a horizontal multi-stage booster pump with stable operation, including a motor 1 and a pump body 2, a rotating shaft 3 is installed in the motor 1, a bearing end cover 4 is installed outside the motor 1, a pump shaft 5 is installed in the pump body 2, the rotating shaft 3 is connected to the pump shaft 5, an impeller 6 is installed on the pump shaft 5, a water inlet node 7 is arranged outside the impeller 6, a guide shell 8 is fixed between the water inlet nodes 7, a through hole 81 is opened on the guide shell 8, a protective ring 82 is installed in the through hole 81, and a flange 71 is arranged at the front end of the water inlet node 7.

[0019] The rotating shaft 3 and the pump shaft 5 are connected, so that the rotation of the rotating shaft 3 drives the rotation of the pump shaft 5, and then forms a negative pressure through the impeller 6, so that the water pump pumps water; the through hole 81 in the guide shell 8 is easy to contact with the impeller 6 when the pump shaft 5 moves, and the setting of the protective ring 82 can prevent the impeller 6 from contacting with the guide shell 8, reduce the wear between the impeller 6 and the guide shell 8, and the protective ring 82 also strengthens the structural strength of the guide shell 8.

[0020] like Figure 1 and Figure 2 As shown, the protective ring 82 is divided into a covering part 1 821 and a covering part 2 822. The covering part 1 821 covers the lower end surface of the guide shell 8, and the covering part 2 822 covers the inside of the through hole 81. The covering part 1 821 is used to cover the lower end surface of the guide shell 8 to prevent the impeller 6 from contacting with the surface of the guide shell 8 and causing wear when the impeller 6 moves with the pump shaft 5; the covering part 2 822 covers the through hole 81 to prevent the main body of the guide shell 8 from being damaged when the impeller 6 contacts with the pump shaft 5 when the pump shaft 5 moves.

[0021] like Figure 1 and Figure 2 As shown, the flange 71 is folded inwardly, and the flange 71 faces the impeller 6. The flange 71 faces the impeller 6, and is used to limit the movement of the impeller 6 when the impeller 6 moves, so as to prevent the impeller 6 from moving too much and contacting the upper end surface of the guide shell 8.

[0022] like Figure 1 and Figure 3 As shown, a spline 31 is provided on the connecting end of the rotating shaft 3, and a spline coupling 9 is provided on the outer surface of the pump shaft 5 and the rotating shaft 3, and the pump shaft 5 is fixedly connected to the spline coupling 9 by screws 12. The spline 31 of the rotating shaft 3 is used to cooperate with the spline coupling 9 to transmit the torque generated by the motor 1, and the spline coupling 9 makes the pump shaft 5 and the rotating shaft 3 rotate synchronously, and prevents the screws 12 connecting the pump shaft 5 and the spline coupling 9 from loosening.

[0023] like Figure 1 and Figure 3 As shown, a thrust pad 10 is installed on the pump shaft 5, and the spline coupling 9 is close to the thrust pad 10. The thrust pad 10 is used to prevent the displacement of the pump shaft 5 when it moves by limiting the spline 31 coupling connected as one body with the pump shaft 5, thereby reducing the influence of the pump shaft 5 moving.

[0024] like Figure 1 and Figure 4 As shown, a groove 41 is provided in the bearing end cover 4, and a water retaining ring 11 is installed on the rotating shaft 3 in the groove 41. The water retaining ring 11 is used to block the gap between the bearing end cover 4 and the rotating shaft 3 when the rotating shaft 3 is driven by the pump shaft 5 and displaced, so as to prevent water from flowing into the motor 1 from the gap between the bearing end cover 4 and the rotating shaft 3. At the same time, the water retaining ring 11 and the bearing end cover 4 cooperate to limit the displacement of the rotating shaft 3, so as to prevent the rotating shaft 3 from being displaced too much.

[0025] The specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or additions to the specific embodiments described or replace them in a similar manner, but this will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0026] Although various terms are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A horizontal multi-stage booster pump with stable operation, comprising a motor (1) and a pump body (2), wherein a rotating shaft (3) is installed inside the motor (1), a bearing end cover (4) is installed outside the motor (1), and a pump shaft (5) is installed inside the pump body (2), characterized in that: The rotating shaft (3) is connected to a pump shaft (5), an impeller (6) is mounted on the pump shaft (5), a water inlet section (7) is arranged outside the impeller (6), a guide shell (8) is fixed between the water inlet sections (7), a through hole (81) is opened on the guide shell (8), a protective ring (82) is mounted in the through hole (81), and a flange (71) is arranged at the front end of the water inlet section (7).

2. A horizontal multi-stage booster pump with stable operation according to claim 1, characterized in that: The protective ring (82) is divided into a covering part 1 (821) and a covering part 2 (822), wherein the covering part 1 (821) covers the left end of the guide shell (8), and the covering part 2 (822) covers the inside of the through hole (81).

3. A horizontal multi-stage booster pump with stable operation according to claim 1, characterized in that: The flange (71) is folded inwards, and the flange (71) faces the impeller (6).

4. A horizontal multi-stage booster pump with stable operation according to claim 1, characterized in that: A spline (31) is provided on the connecting end of the rotating shaft (3), a spline coupling (9) is provided on the outer sleeve of the pump shaft (5) and the rotating shaft (3), and the pump shaft (5) is fixedly connected to the spline coupling (9) by means of a screw (12).

5. A horizontal multi-stage booster pump with stable operation according to claim 4, characterized in that: A thrust pad (10) is mounted on the pump shaft (5), and the spline coupling (9) is in close contact with the thrust pad (10).

6. A horizontal multi-stage booster pump with stable operation according to claim 1, characterized in that: A groove (41) is provided in the bearing end cover (4), and a water retaining ring (11) is installed on the rotating shaft (3) in the groove (41).

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