Deep well multistage centrifugal water pump

Abstract

The utility model provides a deep well multistage centrifugal water pump, and belongs to the technical field of deep well water pumps. The deep well multistage pump solves the problem that in the prior art, power loss of a deep well multistage pump is too large. The multi-stage centrifugal pump comprises a water inlet seat, a sealing ring, a pump shell, a water outlet seat, a pump shaft and a multi-stage impeller assembly, the water inlet seat, the sealing ring, the pump shell and the water outlet seat are fixedly connected in sequence, the pump shaft sequentially penetrates through the water inlet seat, the multi-stage impeller assembly and the water outlet seat, and the multi-stage impeller assembly is installed in the pump shell. The multi-stage impeller assembly comprises a front guide vane, a plurality of impeller bodies, a plurality of fluid directors and a rear cover plate, each fluid director is of an annular structure as a whole, a through hole is formed in the center of each fluid director, a supporting face is formed in each fluid director and is in a high-low shape, and a circulation hole is formed in the side end face in each supporting face; a first worm-shaped flow guide channel and a second worm-shaped flow guide channel are formed in the front side and the rear side of the supporting face respectively, the supporting face is close to the front side of the flow guider, and a containing cavity is formed in the rear side of the supporting face. The utility model has the advantage of less power loss.

Description

Technical Field

[0001] This utility model belongs to the field of deep well water pump technology, and relates to a deep well multi-stage centrifugal water pump. Background Technology

[0002] A deep well pump is a pumping device used to extract groundwater from deep wells. A deep well multistage centrifugal pump uses multiple impellers to perform work on the liquid in stages, converting centrifugal force into pressure energy. The head of a single pump can reach tens to hundreds of meters, which can meet the long-distance and high-altitude water delivery needs of deep wells or high-rise buildings.

[0003] Chinese patent publication number CN211874733U discloses a deep-well submersible multi-stage centrifugal pump for mineral processing, including a centrifugal housing and a centrifugal motor installed on the upper end of the centrifugal housing; the motor rod of the centrifugal motor extends into the centrifugal housing and is equipped with multi-stage centrifugal impellers, with corresponding water intake channels in the centrifugal impellers; a thick sealing plate is installed at the lower end of the centrifugal housing, and a bearing seat is correspondingly provided on the thick sealing plate; the lower end of the motor rod is correspondingly installed at the lower end of the centrifugal housing through the bearing seat; the motor rod extends forward through the bearing seat and is provided with an extension rod that can rotate with the motor rod; water inlets are also provided on both sides of the thick sealing plate at the lower end of the centrifugal housing; a water outlet pipe is provided at the upper end of the centrifugal housing; filter plates are correspondingly fixedly installed on the external ports of the water inlets on both sides; a transverse agitator is also installed on the extension rod, the position of the agitator corresponding to the end face of the filter plate, and the agitator can pass over the end face of the filter plate when rotating.

[0004] In the deep well submersible multi-stage centrifugal pump for mineral processing provided by this patent, the water inlets set on both sides of the lower end of the pump casing may cause asymmetrical flow when the fluid enters the pump body. If the water inlets on both sides are not optimized for flow guidance, they are prone to generating opposing vortices inside the pump casing, increasing local resistance loss. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a deep well multi-stage centrifugal water pump.

[0006] The objective of this utility model can be achieved through the following technical solution: A deep well multi-stage centrifugal water pump includes an inlet seat, a sealing ring, a pump casing, an outlet seat, a pump shaft, and a multi-stage impeller assembly. The inlet seat, sealing ring, pump casing, and outlet seat are sequentially fixedly connected. The pump shaft passes through the inlet seat, the multi-stage impeller assembly, and the outlet seat in sequence. The multi-stage impeller assembly is installed inside the pump casing. The multi-stage impeller assembly includes a front guide vane, several impeller bodies, several guide vanes, and a rear cover plate. The guide vanes are generally circular in shape and have a through hole in the center. A support surface is formed inside the guide vane. The support surface is of varying heights and has flow holes on its side end faces. A first volute flow channel and a second volute flow channel are respectively formed on the front and rear sides of the support surface. A placement cavity is formed near the front side of the guide vane and on the rear side of the support surface. A keyway is formed in the impeller body. The impeller body is sleeved on the pump shaft and placed in the placement cavity.

[0007] In the aforementioned deep well multi-stage centrifugal water pump, the front guide vane is installed on the front side of the foremost guide vane and is fixedly connected to the guide vane; the other side of the front guide vane is fixedly connected to a sealing ring; and the rear cover plate is fixedly connected to the rear side of the last guide vane.

[0008] In the aforementioned deep well multi-stage centrifugal water pump, the first volute guide channel and the second volute guide channel are in opposite directions.

[0009] In the aforementioned deep well multi-stage centrifugal water pump, an inlet impeller is installed inside the sealing ring, and the inlet impeller is connected to the pump shaft.

[0010] In the aforementioned deep well multi-stage centrifugal water pump, a first water inlet hole is provided inside the sealing ring, and a second water inlet hole is provided in the guide vane. The positions of the first water inlet hole and the second water inlet hole are different.

[0011] Compared with the prior art, the deep well multi-stage centrifugal water pump provided by this utility model has the following beneficial effects: 1. The guide vane is equipped with a first volute guide channel and a second volute guide channel. The volute structure conforms to the principle of fluid dynamics, which can effectively guide the fluid to transition smoothly, reduce the generation of turbulence and eddies, and reduce hydraulic losses; 2. The high and low design of the support surface and the internal flow holes make the fluid distribution in the guide vane more uniform, avoid local blockage, ensure stable flow area, and further reduce flow resistance; 3. The first water inlet hole inside the sealing ring and the second water inlet hole of the front guide vane are in different positions. This staggered design makes the water intake more uniform, avoids the fluid from impacting each other at the inlet, reduces water intake resistance, and ensures that the fluid enters the pump body smoothly. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the front structure of the flow guide;

[0015] Figure 4 This is a schematic diagram of the rear structure of the flow guide.

[0016] In the diagram: 1. Inlet seat; 2. Sealing ring; 21. First inlet hole; 3. Pump casing; 4. Outlet seat; 5. Pump shaft; 6. Multi-stage impeller assembly; 61. Front guide vane; 611. Second inlet hole; 62. Impeller body; 621. Keyway; 63. Flow guide; 631. Through hole; 632. Support surface; 633. Flow hole; 634. First volute flow guide channel; 635. Second volute flow guide channel; 636. Placement cavity; 64. Rear cover plate; 7. Inlet impeller. Detailed Implementation

[0017] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0018] like Figures 1 to 4 As shown, this embodiment includes an inlet seat 1, a sealing ring 2, a pump casing 3, an outlet seat 4, a pump shaft 5, and a multi-stage impeller assembly 6. The inlet seat 1, the sealing ring 2, the pump casing 3, and the outlet seat 4 are fixedly connected in sequence. The pump shaft 5 passes through the inlet seat 1, the multi-stage impeller assembly 6, and the outlet seat 4 in sequence. The multi-stage impeller assembly 6 is installed inside the pump casing 3.

[0019] like Figures 2 to 4 As shown, the multi-stage impeller assembly 6 includes a front guide vane 61, several impeller bodies 62, several guide vanes 63, and a rear cover plate 64. The front guide vane 61 is installed on the front side of the foremost guide vane 63 and is fixedly connected to the guide vane 63. The other side of the front guide vane 61 is fixedly connected to the sealing ring 2, forming a stable front-end guiding structure. The rear cover plate 64 is fixedly connected to the rear side of the last guide vane 63, forming a rear-end closed protection for the multi-stage impeller assembly 6. The guide vane 63 has an overall annular structure, and a through hole 631 is opened in the center of the guide vane 63. The interior of the guide vane 63 forms... The support surface 632 is of varying heights, and a flow hole 633 is provided on the side end face inside the support surface 632. A first volute guide channel 634 and a second volute guide channel 635 are respectively provided on the front and rear sides of the support surface 632. The support surface 632 is close to the front side of the guide 63, and a placement cavity 636 is formed on the rear side of the support surface 632. A keyway 621 is provided in the impeller body 62. The impeller body 62 is sleeved on the pump shaft 5 and precisely positioned in the placement cavity 636 to ensure the stability of power transmission between the impeller body 62 and the pump shaft 5.

[0020] To elaborate further, such as Figures 3 to 4As shown, the first spiral guide channel 634 and the second spiral guide channel 635 are in opposite directions. The first spiral guide channel 634 and the second spiral guide channel 635 in opposite directions can guide the fluid to change its flow direction smoothly, reduce flow impact, and improve energy conversion efficiency.

[0021] To elaborate further, such as Figures 2 to 4 As shown, an inlet impeller 7 is installed inside the sealing ring 2. The inlet impeller 7 is connected to the pump shaft 5 to achieve the initial introduction and acceleration of the fluid. A first inlet hole 21 is opened inside the sealing ring 2, and a second inlet hole 611 is opened in the guide vane 61. The positions of the first inlet hole 21 and the second inlet hole 611 are different. This structure optimizes the water inlet path, reduces the mutual impact of the fluid at the inlet, ensures that the fluid enters the pump body more evenly and smoothly, and reduces the water inlet resistance.

[0022] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0023] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A deep well multistage centrifugal water pump, comprising an inlet seat (1), a sealing ring (2), a pump casing (3), an outlet seat (4), a pump shaft (5), and a multistage impeller assembly (6), wherein the inlet seat (1), the sealing ring (2), the pump casing (3), and the outlet seat (4) are sequentially fixedly connected, and the pump shaft (5) sequentially passes through the inlet seat (1), the multistage impeller assembly (6), and the outlet seat (4), characterized in that: The multi-stage impeller assembly (6) is installed inside the pump casing (3). The multi-stage impeller assembly (6) includes a front guide vane (61), several impeller bodies (62), several guide vanes (63), and a rear cover plate (64). The guide vanes (63) are generally circular in shape and have a through hole (631) in the center. A support surface (632) is formed inside the guide vanes (63). The support surface (632) is of varying heights and the sides inside the support surface (632) are... A flow hole (633) is provided on the end face. A first volute flow guide channel (634) and a second volute flow guide channel (635) are provided on the front and rear sides of the support surface (632). The support surface (632) is close to the front side of the guide (63) and a placement cavity (636) is formed on the rear side of the support surface (632). A keyway (621) is provided in the impeller body (62). The impeller body (62) is sleeved on the pump shaft (5) and placed in the placement cavity (636).

2. A deep-well multi-stage centrifugal water pump according to claim 1, characterized in that: The front guide vane (61) is installed on the front side of the foremost guide vane (63) and is fixedly connected to the guide vane (63). The other side of the front guide vane (61) is fixedly connected to the sealing ring (2). The rear cover plate (64) is fixedly connected to the rear side of the last guide vane (63).

3. A deep-well multi-stage centrifugal water pump according to claim 1, characterized in that: The first spiral guide channel (634) and the second spiral guide channel (635) are in opposite directions.

4. A deep-well multi-stage centrifugal water pump according to claim 1, characterized in that: The sealing ring (2) is equipped with an inlet impeller (7), which is connected to the pump shaft (5).

5. A deep-well multi-stage centrifugal water pump according to claim 1, characterized in that: The sealing ring (2) has a first water inlet hole (21) inside, and the guide vane (61) has a second water inlet hole (611) inside. The positions of the first water inlet hole (21) and the second water inlet hole (611) are different.

Images