Water pump body structure

Abstract

The utility model provides a kind of water pump body structure, including pump shaft, upper shell, lower shell, upper shell is connected on lower shell, pump shaft passes through upper shell and is connected with impeller after being inserted into lower shell, pump shaft is rotatably connected on upper shell, further include the sealing sleeve for placing oil seal, sealing sleeve includes the first connecting ring, first sleeve pipe, second connecting ring, second sleeve pipe and third connecting ring of integration, first connecting ring is connected on the outer wall of first sleeve pipe and is located the upper end of first sleeve pipe, first connecting ring is connected with the inner wall of upper shell by positioning bolt, the outer wall of second connecting ring is connected on the inner wall of first sleeve pipe and is located the lower end of first sleeve pipe, the upper end of second sleeve pipe is connected with the inner wall of second connecting ring, the outer wall of third connecting ring is connected on the inner wall of second sleeve pipe and is located the lower end of second sleeve pipe, pump shaft is placed in lower shell after passing through third connecting ring, reach the purpose of convenient assembly.

Description

Technical Field

[0001] This utility model relates to water pumps, and more particularly to a water pump body structure. Background Technology

[0002] Currently, a Chinese patent with authorization announcement number CN219081856U discloses a hydraulic motor sand pump. Its technical solution includes: a main frame with a power input end; a drainage housing fixed below the main frame, on which a filter cover and a connector are installed; and a hydraulic motor installed at the power input end. The output end of the hydraulic motor is connected to an output main shaft, which has a frame and multiple sets of mechanical seals. The main frame contains multiple independent oil chambers, and an impeller is installed at the end of the main shaft.

[0003] The frame consists of an upper frame and a lower frame. The upper frame is fixed to the main frame with two sets of bolts, while the lower frame is connected to the bottom of the upper frame with one set of bolts. The output spindle is connected to the upper frame via a double-sided mechanical seal. The bottom of the double-sided mechanical seal is connected to both the lower frame and the output spindle. A single-sided mechanical seal is installed between the output spindle and the lower frame.

[0004] However, the above solution has inconveniences in assembly. Since the upper frame is fixed with two sets of bolts and the lower frame with one set of bolts, and each set contains at least four bolts, operators need to tighten at least 12 bolts during assembly. This makes the manufacturing process rather cumbersome. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a water pump body structure that facilitates assembly.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a water pump body structure, including a pump shaft, an upper housing, and a lower housing. The upper housing is connected to the lower housing. The pump shaft passes through the upper housing and into the lower housing, and is connected to an impeller. The pump shaft is rotatably connected to the upper housing. It also includes a sealing sleeve for placing an oil seal. The sealing sleeve includes an integrally formed first connecting ring, a first sleeve, a second connecting ring, a second sleeve, and a third connecting ring. The first connecting ring is connected to the outer wall of the first sleeve and is located at the upper end of the first sleeve. The first connecting ring is connected to the inner wall of the upper housing through a positioning bolt. The outer wall of the second connecting ring is connected to the inner wall of the first sleeve and is located at the lower end of the first sleeve. The upper end of the second sleeve is connected to the inner wall of the second connecting ring. The outer wall of the third connecting ring is connected to the inner wall of the second sleeve and is located at the lower end of the second sleeve. The pump shaft passes through the third connecting ring and is placed in the lower housing.

[0007] To achieve the above technical solution, an integrated sealing sleeve is used. This sleeve integrates a first connecting ring, a first sleeve, a second connecting ring, a second sleeve, and a third connecting ring. During assembly, it functions as a single component, achieving rapid connection and positioning with the inner wall of the upper housing via positioning bolts. This structure integrates the previously complex sealing and support structure, which required multiple parts to be installed and fixed step by step, into a standardized single module. This greatly simplifies the assembly process of the water pump body, shortens production time, and improves assembly accuracy and efficiency. At the same time, the integrated structure enhances the overall rigidity and coaxiality of the sealing area, laying a solid foundation for the stable operation of the pump shaft and reliable sealing, achieving the technical effects of simplified assembly, improved efficiency, and structural stability.

[0008] As a preferred embodiment of this utility model, the second connecting ring is provided with a first oil injection hole, which is connected to the interior of the first sleeve, and a first sealing bolt is threaded onto the first oil injection hole.

[0009] To achieve the above technical solution, a first oil injection hole communicating with the inside of the first sleeve is opened on the second connecting ring, and a threaded seal is created using the first sealing plug, thus constructing an independent lubrication and maintenance channel. When it is necessary to lubricate or replenish grease for the oil seals and other sealing components inside the sealing sleeve, the operator only needs to unscrew the first sealing plug and add grease through the first oil injection hole.

[0010] As a preferred embodiment of this utility model, a limiting ring for oil seal positioning is integrally connected to the inner wall of the upper housing. The limiting ring is located outside the pump shaft and inside the first sleeve.

[0011] To achieve the above technical solution, a limiting ring is integrally connected directly to the inner wall of the upper housing. This limiting ring is spatially located inside the first sleeve and outside the pump shaft. When the oil seal is installed inside the first sleeve, this limiting ring constitutes a rigid physical boundary for the axial position of the oil seal.

[0012] As a preferred embodiment of this utility model, a placement groove is provided on the inner wall of the upper housing, a bearing is embedded in the placement groove, the pump shaft passes through the inner wall of the bearing, and an anti-detachment ring is fixedly connected to the outer wall of the pump shaft, the anti-detachment ring abuts against the end face of the bearing.

[0013] To achieve the above technical solution, a groove is created on the inner wall of the upper housing to precisely embed a bearing. Simultaneously, an anti-disengagement ring is fixedly connected to the outer wall of the pump shaft passing through the bearing, with the end face of the anti-disengagement ring abutting against the end face of the bearing. This structure utilizes the bearing to provide stable radial support for the pump shaft, and the mutual abutment between the anti-disengagement ring and the bearing end face creates a one-way axial lock on the pump shaft. This effectively prevents the pump shaft from shifting or disengaging from the upper housing under axial force, ensuring a constant positional relationship between the pump shaft and the impeller. This achieves the technical effect of providing reliable support for the pump shaft, achieving precise axial positioning, and ensuring stable and safe pump operation. Furthermore, since only one bearing is used, a shorter pump shaft can be used, thereby increasing the transmitted torque.

[0014] As a preferred embodiment of this utility model, a positioning ring groove is provided on the inner wall of the placement groove, and a retaining spring for contacting the end face of the bearing is embedded in the positioning ring groove. The retaining spring and the anti-disengagement ring are located on the same side of the bearing.

[0015] To achieve the above technical solution, a positioning ring groove is added to the inner wall of the placement groove, and a retaining spring is embedded therein. The retaining spring and the anti-disengagement ring are located on the same side of the bearing, and the end face of the retaining spring abuts against the end face of the bearing. This constitutes a double axial constraint on the bearing.

[0016] As a preferred embodiment of this utility model, a second oil injection hole communicating with the placement groove is provided on the side wall of the upper housing. The second oil injection hole is located on the side of the retaining spring away from the bearing, and a second sealing bolt is threaded onto the second oil injection hole.

[0017] To achieve the above technical solution, a second oil injection hole is opened on the side wall of the upper housing, directly communicating with the internal space of the placement groove, and sealed with a second sealing plug. The second oil injection hole is positioned on the side of the retaining spring away from the bearing, ensuring that lubricating oil can be smoothly injected and fill the entire placement groove, thereby providing sufficient lubrication to the internal bearing. This provides the bearing with an independent and convenient lubrication channel, facilitating regular maintenance and achieving the technical effect of effectively reducing bearing wear and extending its service life.

[0018] As a preferred embodiment of this utility model, a flow guide ring is threadedly connected to the side of the lower housing away from the upper housing, and multiple flow guide columns are fixedly connected to the inner wall of the flow guide ring, with the multiple flow guide columns evenly distributed along the axis of the flow guide ring.

[0019] To achieve the above technical solution, a guide ring with multiple guide columns is installed on the water inlet side of the lower casing. When external water flows through this guide ring to enter the impeller, the evenly distributed array of multiple guide columns physically organizes and regulates the incoming flow. This process aims to eliminate turbulence, vortices, or uneven flow velocities that may exist in the suction pipe, adjusting the water flow to a stable, near-axial flow state before it is sent into the impeller. This optimizes the impeller inlet conditions, ensuring that the impeller blades can operate in a stable and uniform flow field, thereby achieving the technical effects of stabilizing the inlet flow, reducing hydraulic vibration and noise, improving pump suction performance, and enhancing overall operational stability.

[0020] As a preferred embodiment of this utility model, a plurality of flow guide blocks are fixedly connected to the inner wall of the flow guide ring. The flow guide blocks and flow guide columns are arranged at intervals. The flow guide block includes an integrated upper vertical section, a lower vertical section and an inclined section. The inclined section is located between the upper vertical section and the lower vertical section.

[0021] To achieve the above technical solution, a more complex composite inlet flow guiding structure is constructed by adding flow guide blocks with specific geometric shapes between the flow guide columns. When water flows through this structure, the inclined sections of the flow guide blocks further guide and adjust the water flow, which has already been initially regulated by the flow guide columns, making its flow direction and velocity distribution more uniform. This design achieves secondary optimization of the water flow before it enters the impeller, ensuring that the water flow can smoothly transition into the rotating impeller in a more ideal manner. This achieves the technical effects of further optimizing the impeller inlet flow field, reducing inlet hydraulic impact losses, and improving pump efficiency.

[0022] As a preferred embodiment of this utility model, one end of the guide column is fixed to the inner wall of the guide ring, and the other end of the guide column extends in a direction close to the axis of the guide ring. The guide column includes two integrated guide sections, which are centrally symmetrically arranged. A guide slope is provided on one side of each guide section. Both the guide slope and the inclined section are inclined to one side. A guide protrusion is fixedly connected to the guide slope. The outer wall of the guide protrusion has a smooth arc surface. Multiple guide protrusions are arranged along the length direction of the guide section.

[0023] To achieve the above technical solution, firstly, the layout of the guide column extending from the inner wall of the guide ring towards the center of the axis, along with its centrally symmetrical structural design, ensures balanced and non-deflecting axial regularity of the incoming water flow. Its core purpose is to eliminate any pre-swirl in the incoming flow, providing an ideal, straight axial inflow to the impeller. The guide slope on the guide column and the inclined section on the guide block are designed to be inclined in the same direction in a coordinated manner. This design creates a unified and smooth guiding flow field. When water flows through, it is continuously and without conflict guided to the preset path under the combined action of the two independent components, effectively avoiding local turbulence and hydraulic losses caused by abrupt changes in the flow channel. By arranging multiple guide protrusions with smooth arc surfaces along the water flow direction on the guide slope, fine control of the incoming water boundary layer is achieved. These guide protrusions can microscopically intervene in the water flow close to the surface of the guide column, maintaining its energy and effectively suppressing flow separation during the guiding process. It achieves high-precision composite rectification of the water flow entering the impeller, which not only ensures the axial straightness of the flow pattern, but also minimizes the inlet hydraulic loss by controlling the boundary layer, greatly optimizes the inlet conditions of the impeller, and thus significantly improves the cavitation performance, operating efficiency and working stability of the water pump. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the external structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the external structure of this utility model;

[0027] Figure 4 This is an exploded view of the present invention;

[0028] Figure 5 This is an exploded view of the present invention;

[0029] Figure 6 This is a cross-sectional schematic diagram of the present invention;

[0030] Figure 7 This is a schematic diagram of the flow guide ring.

[0031] Reference numerals: 1. Pump shaft; 2. Upper housing; 3. Lower housing; 4. Impeller; 5. Placement groove; 6. Bearing; 7. Positioning ring groove; 8. Snap ring; 9. Sealing sleeve; 10. First connecting ring; 11. First sleeve; 12. Second connecting ring; 13. Second sleeve; 14. Third connecting ring; 15. Limiting ring; 16. First oil injection hole; 17. First sealing bolt; 18. Second oil injection hole; 19. Second sealing bolt; 20. Guide ring; 21. Guide column; 22. Guide section; 23. Guide slope; 24. Guide protrusion; 25. Smooth arc surface; 26. Guide block; 27. Upper vertical section; 28. Lower vertical section; 29. ​​Inclined section; 30. Support frame. Detailed Implementation

[0032] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0033] A water pump body structure includes a pump shaft 1, an upper housing 2, and a lower housing 3. The upper housing 2 is located above the lower housing 3 and is fixed to the lower housing 3 by bolts.

[0034] The pump shaft 1 passes through the upper housing 2 and into the lower housing 3, and is connected to the impeller 4, which is located inside the lower housing 3.

[0035] Pump shaft 1 is rotatably connected to upper housing 2.

[0036] A placement groove 5 is provided on the inner wall of the upper housing 2. The placement groove 5 has a circular cross-section. A bearing 6 is embedded in the placement groove 5, and the pump shaft 1 passes through the inner wall of the bearing 6. An anti-detachment ring is integrally connected to the outer wall of the pump shaft 1. The anti-detachment ring abuts against the upper end face of the bearing 6 and is coaxial with the pump shaft 1.

[0037] A positioning ring groove 7 is formed on the inner wall of the placement groove 5, and the positioning ring groove 7 is coaxially arranged with the placement groove 5. A retaining spring 8 is embedded in the positioning ring groove 7 for contacting the upper end face of the bearing 6.

[0038] A sealing sleeve 9 for placing an oil seal is provided inside the upper housing 2.

[0039] The sealing sleeve 9 includes an integrally formed first connecting ring 10, a first sleeve 11, a second connecting ring 12, a second sleeve 13, and a third connecting ring 14. The first connecting ring 10, the first sleeve 11, the second connecting ring 12, the second sleeve 13, and the third connecting ring 14 are coaxially arranged.

[0040] The first connecting ring 10 is connected to the outer wall of the first sleeve 11 and located at the upper end of the first sleeve 11. The first connecting ring 10 is fixedly connected to the inner wall of the upper housing 2 by positioning bolts. Four positioning bolts are provided and evenly distributed along the axis of the first connecting ring 10. The outer wall of the second connecting ring 12 is connected to the inner wall of the first sleeve 11 and located at the lower end of the first sleeve 11. The upper end of the second sleeve 13 is connected to the inner wall of the second connecting ring 12. The outer wall of the third connecting ring 14 is connected to the inner wall of the second sleeve 13 and located at the lower end of the second sleeve 13. The pump shaft 1 passes through the third connecting ring 14 and is placed in the lower housing 3.

[0041] A limiting ring 15 for oil seal positioning is integrally connected to the inner wall of the upper housing 2. The limiting ring 15 is coaxially arranged with the first sleeve 11. The limiting ring 15 is located outside the pump shaft 1 and inside the first sleeve 11.

[0042] A first oil injection hole 16 is provided on the second connecting ring 12. The first oil injection hole 16 communicates with the interior of the first sleeve 11. A first sealing bolt 17 is threaded onto the first oil injection hole 16.

[0043] A second oil injection hole 18 communicating with the placement groove 5 is provided on the side wall of the upper housing 2. The second oil injection hole 18 is located on the side of the retaining spring 8 away from the bearing 6, and a second sealing bolt 19 is threaded onto the second oil injection hole 18.

[0044] A guide ring 20 is threaded onto the side of the lower housing 3 away from the upper housing 2. The guide ring 20 is located below the impeller 4 and on the water inlet side of the lower housing 3. Five guide columns 21 are fixedly connected to the inner wall of the guide ring 20. The five guide columns 21 are evenly distributed along the axis of the guide ring 20. One end of the guide column 21 is fixed to the inner wall of the guide ring 20, and the other end of the guide column 21 extends in a direction close to the axis of the guide ring 20.

[0045] The guide column 21 includes two integrated guide sections 22. The two guide sections 22 are arranged vertically and are centrally symmetrical between each other.

[0046] A guide slope 23 is provided on one side of the guide section 22, and four guide protrusions 24 are fixedly connected to the guide slope 23. The four guide protrusions 24 are arranged along the length of the guide section 22. The outer wall of the guide protrusions 24 has a smooth arc surface 25.

[0047] Five guide blocks 26 are fixedly connected to the inner wall of the guide ring 20, and the five guide blocks 26 and five guide columns 21 are arranged at intervals. The guide block 26 includes an integrated upper vertical section 27, a lower vertical section 28, and an inclined section 29. The inclined section 29 is located between the upper vertical section 27 and the lower vertical section 28. The guide slope 23 and the inclined section 29 are both inclined to one side.

[0048] The flow guide ring 20, flow guide column 21, and flow guide block 26 are integrated into one unit.

[0049] A support frame 30 is bolted to the lower surface of the lower housing 3.

[0050] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A water pump body structure, comprising a pump shaft (1), an upper housing (2), and a lower housing (3), wherein the upper housing (2) is connected to the lower housing (3), the pump shaft (1) passes through the upper housing (2) and into the lower housing (3) and is connected to an impeller (4), and the pump shaft (1) is rotatably connected to the upper housing (2), characterized in that: It also includes a sealing sleeve (9) for placing an oil seal. The sealing sleeve (9) includes an integrally formed first connecting ring (10), a first sleeve (11), a second connecting ring (12), a second sleeve (13), and a third connecting ring (14). The first connecting ring (10) is connected to the outer wall of the first sleeve (11) and is located at the upper end of the first sleeve (11). The first connecting ring (10) is connected to the inner wall of the upper housing (2) by a positioning bolt. The outer wall of the second connecting ring (12) is connected to the inner wall of the first sleeve (11) and is located at the lower end of the first sleeve (11). The upper end of the second sleeve (13) is connected to the inner wall of the second connecting ring (12). The outer wall of the third connecting ring (14) is connected to the inner wall of the second sleeve (13) and is located at the lower end of the second sleeve (13). The pump shaft (1) passes through the third connecting ring (14) and is placed in the lower housing (3).

2. The pump body structure according to claim 1, characterized in that: The second connecting ring (12) has a first oil injection hole (16) which is connected to the interior of the first sleeve (11). A first sealing bolt (17) is threaded onto the first oil injection hole (16).

3. The pump body structure according to claim 1, characterized in that: The inner wall of the upper housing (2) is integrally connected with a limiting ring (15) for oil seal limiting. The limiting ring (15) is located outside the pump shaft (1) and inside the first sleeve (11).

4. The pump body structure according to claim 1, characterized in that: The inner wall of the upper housing (2) is provided with a placement groove (5), and a bearing (6) is embedded in the placement groove (5). The pump shaft (1) passes through the inner wall of the bearing (6), and an anti-detachment ring is fixedly connected to the outer wall of the pump shaft (1). The anti-detachment ring abuts against the end face of the bearing (6).

5. The pump body structure according to claim 4, characterized in that: The inner wall of the placement groove (5) is provided with a positioning ring groove (7), and a retaining ring (8) for contacting the end face of the bearing (6) is embedded in the positioning ring groove (7). The retaining ring (8) and the anti-disengagement ring are located on the same side of the bearing (6).

6. The pump body structure according to claim 5, characterized in that: The upper housing (2) has a second oil injection hole (18) that communicates with the placement groove (5) on its side wall. The second oil injection hole (18) is located on the side of the snap ring (8) away from the bearing (6). A second sealing bolt (19) is threaded onto the second oil injection hole (18).

7. The pump body structure according to claim 1, characterized in that: The lower housing (3) is threadedly connected to a flow guide ring (20) on the side away from the upper housing (2). Multiple flow guide columns (21) are fixedly connected to the inner wall of the flow guide ring (20), and the multiple flow guide columns (21) are evenly distributed along the axis of the flow guide ring (20).

8. The pump body structure according to claim 7, characterized in that: Multiple guide blocks (26) are fixedly connected to the inner wall of the guide ring (20). The guide blocks (26) and the guide columns (21) are arranged at intervals. The guide block (26) includes an integrated upper vertical section (27), a lower vertical section (28), and an inclined section (29). The inclined section (29) is located between the upper vertical section (27) and the lower vertical section (28).

9. A water pump body structure according to claim 8, characterized in that: One end of the guide column (21) is fixed to the inner wall of the guide ring (20), and the other end of the guide column (21) extends towards the axis of the guide ring (20). The guide column (21) includes two integrated guide sections (22), which are centrally symmetrically arranged. A guide slope (23) is provided on one side of the guide section (22). The guide slope (23) and the inclined section (29) are both inclined to one side. A guide protrusion (24) is fixedly connected to the guide slope (23). The outer wall of the guide protrusion (24) has a smooth arc surface (25). Multiple guide protrusions (24) are arranged along the length direction of the guide section (22).

Images