Submerged high temperature hot water pump

Abstract

The utility model relates to the liquid high temperature hot water pump under liquid belongs to liquid pump technical field, including motor frame, pump shaft, bearing body, fixed disc, coupling pipe, back cover, impeller, pump body and outlet pipe, the lower part inner hole of bearing body inserts bearing one, the lower part of bearing body is equipped with sealing gland, the lower part outside of bearing body is equipped with cooling ring platform, is equipped with the notch on the cooling ring platform, is equipped with cooling cavity in the cooling ring platform, the both sides of notch cooling ring platform end all are equipped with circulating water hole, the notch is equipped with oil hole, the upper portion of the inner hole of sealing gland is equipped with oil seal, the lower portion of the inner hole of sealing gland is equipped with sealing packing, the lower portion of sealing packing is equipped with packing gland. The design of cooling ring platform and cooling cavity, greatly reduce bearing temperature, prolong the life of lubricating grease, the lower part of bearing one through the composite structure of oil seal and sealing packing, prevent the lubricating grease from leaking under high temperature and prevent the high temperature gas in the coupling pipe from invading bearing one, better protect bearing one.

Description

Technical Field

[0001] This utility model relates to a submersible high-temperature hot water pump, belonging to the field of liquid pump technology. Background Technology

[0002] Submersible high-temperature hot water pumps are vertical single-stage centrifugal pumps. This series of pumps is used to transport high-temperature liquids, such as sewage, clean water, water-like liquids with similar physical and chemical properties, and liquids without solid particles. The submersible part has no bearings or seals, which facilitates maintenance. However, due to the high temperature of the transported medium, the grease at the bearing is prone to leakage due to the high temperature, and high-temperature gas in the connecting pipe can easily invade the bearing, affecting the service life of the bearing. Utility Model Content

[0003] This utility model provides a submersible high-temperature hot water pump, which solves the problems of current equipment having a complex structure, being inconvenient to adjust, having poor material flow, and having uneven material distribution.

[0004] This utility model relates to a submersible high-temperature hot water pump, including a motor frame, pump shaft, bearing body, fixed plate, connecting pipe, rear cover, impeller, pump body, and outlet pipe. A bearing is embedded in the lower inner hole of the bearing body. A sealing cover is provided below the bearing. A cooling ring platform is provided on the lower outer side of the bearing body. A notch is provided on the cooling ring platform. A cooling chamber is provided inside the cooling ring platform. Circulating water holes communicating with the cooling chamber are provided at the ends of the cooling ring platform on both sides of the notch. The two circulating water holes are respectively connected to a cooling water inlet pipe and a cooling water outlet pipe. An oil injection hole for supplying oil to the bearing is provided at the notch. An oil seal is provided at the upper part of the inner hole of the sealing cover. A sealing packing is provided at the lower part of the inner hole of the sealing cover. A packing cover is provided at the lower part of the sealing packing.

[0005] As a preferred embodiment, a sand-removing port is provided at the cooling ring platform opposite the notch. Both the sand-removing port and the two circulating water holes are equipped with sealing plates. The two sealing plates on the circulating water holes are fixedly connected to the cooling water inlet pipe and the cooling water outlet pipe, respectively. The sand-removing port allows for better removal of residual sand particles from the cooling chamber during the casting of the bearing body.

[0006] As a preferred design, the cooling water inlet pipe is located at the lower part of the sealing plate, and the cooling water outlet pipe is located at the upper part of the sealing plate. Together with the circulating water holes at both ends, it can better complete the circulation of coolant and better eliminate water flow dead zones. The bearing body has a vent hole in the middle, and the vent hole is threadedly connected to a vent plug to release the gas inside the bearing body before grease is added, preventing the formation of a vacuum that would prevent the addition of lubricating grease. The bottom of the cooling chamber has a drain hole, and the drain hole is threadedly connected to a drain plug to facilitate the drainage of liquid in the cooling chamber when not in use.

[0007] As a preferred embodiment, the lower inner bore of the bearing housing is provided with a support recess for supporting the sealing cap, and the inner wall of the cooling cavity corresponding to the outer side of the support recess is conical with an upper diameter smaller than a lower diameter. The conical transition optimizes the wall thickness distribution in the lower part of the bearing housing, avoids stress concentration caused by right-angle transitions, and improves the resistance to deformation under high temperature and high pressure conditions.

[0008] As a preferred embodiment, the top of the cooling ring platform is fixed with multiple reinforcing ribs. The inner side of the reinforcing ribs is fixed to the outer wall of the bearing body to improve the rigidity of the ring platform. The top of the reinforcing ribs is fixed to the top flange of the bearing body. Reinforcing ribs are also provided on the top of the circulating water hole and the sand cleaning port to improve the rigidity at the circulating water hole.

[0009] As a preferred option, the upper outer side of the water outlet pipe is fitted with two semi-circular fixing clamps, one of which is fixed to the top of the fixing plate, making it convenient to install the water outlet pipe.

[0010] As a preferred embodiment, a bracket is fixed to the bottom of the pump body, and a clamping nut is provided on the pump shaft above the bearing to secure the bearing and prevent axial movement. The cooling medium enters the cooling chamber from the lower cooling water inlet pipe, and with the guidance of the conical inner wall and the annular path arranged at both ends, it covers the lower part of the bearing body without dead angles; the clearance notch only partially accommodates the oil injection hole, without disrupting the continuity of the annular flow channel, ensuring heat dissipation efficiency.

[0011] As a preferred embodiment, the upper part of the bearing body is provided with an upper support mechanism that supports the upper part of the pump shaft. The upper support mechanism includes a second bearing installed at the top of the inner hole of the connecting pipe, an oil baffle ring below the second bearing, a bearing cover fixed on the bearing body above the second bearing, a bearing sleeve in the inner hole of the bearing cover, a clamping round nut fixed on the pump shaft above the bearing sleeve, and a labyrinth seal at the upper part of the connection between the bearing sleeve and the bearing cover.

[0012] This utility model has the following beneficial effects:

[0013] The design of the cooling ring platform and cooling chamber significantly reduces bearing temperature and extends grease life. The lower part of bearing one uses a composite structure of oil seal and sealing packing to prevent grease leakage due to high temperature and to prevent high-temperature gas from the connecting pipe from entering bearing one, thus better protecting bearing one. The notch provides installation space for the oil injection hole, eliminating the spatial conflict between the annular structure of the cooling ring platform and the oil injection component, simplifying the manufacturing process. After the cooling medium enters the cooling chamber from one end, it flows evenly along the annular path through the lower part of the bearing body and then exits from the other end, better eliminating dead zones in water flow and ensuring that the heat around the bearing is evenly removed, avoiding local overheating that could lead to bearing failure. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0015] Figure 2 for Figure 1 Partial structural diagram Figure 1 ;

[0016] Figure 3 for Figure 1 Partial structural diagram Figure 2 ;

[0017] Figure 4 This is a schematic diagram of the three-dimensional structure of the bearing housing;

[0018] Figure 5 This is a schematic diagram of the axial cross-sectional structure of the bearing housing;

[0019] Figure 6 This is a schematic diagram of the radial cross-sectional structure of the bearing housing;

[0020] In the diagram: 1. Motor frame; 2. Reinforcing rib plate; 3. Upper support mechanism; 31. Bearing cover; 32. Bearing sleeve; 33. Oil baffle ring; 4. Bearing body; 5. Cooling water inlet pipe; 6. Oil injection hole; 7. Cooling ring platform; 8. Water outlet pipe; 9. Circulating water hole; 10. Sealing plate; 11. Cooling water outlet pipe; 12. Sealing cover; 13. Packing cover; 14. Cooling chamber; 15. Connecting pipe; 16. Pump shaft; 17. Impeller; 18. Pump body; 19. Bracket; 20. Rear cover; 21. Fixing clamp; 22. Fixing plate; 23. Sealing packing; 24. Oil seal; 25. Drain hole; 26. Vent hole; 27. Sand removal port. Detailed Implementation

[0021] The present invention will be further described below with reference to the embodiments.

[0022] Example 1, as Figures 1 to 6 As shown, this utility model is a submersible high-temperature hot water pump, including a motor frame 1, a pump shaft 16, a bearing body 4, a fixed plate 22, a connecting pipe 15, a rear cover 20, an impeller 17, a pump body 18, and a water outlet pipe 8. A bearing is embedded in the lower inner hole of the bearing body 4. A sealing cover 12 is provided below the bearing. A cooling ring platform 7 is provided on the lower outer side of the bearing body 4. A notch is provided on the cooling ring platform 7. A cooling chamber 14 is provided inside the cooling ring platform 7. Circulating water holes 9 are provided at the ends of the cooling ring platform 7 on both sides of the notch, which are connected to the cooling chamber 14. The two circulating water holes 9 are respectively connected to a cooling water inlet pipe 5 and a cooling water outlet pipe 11. An oil injection hole 6 is provided at the notch to supply oil to the bearing. An oil seal 24 is provided at the upper part of the inner hole of the sealing cover 12. A sealing packing 23 is provided at the lower part of the inner hole of the sealing cover 12. A packing cover 13 is provided at the lower part of the sealing packing 23.

[0023] When the cooling system is running, the circulation path is as follows: the cooling medium (such as water) enters the circulating water hole 9 from the cooling water inlet pipe 5, flows into the cooling chamber 14, surrounds the lower part of the bearing body 4 to absorb the heat of the bearing, and then flows out from the cooling water outlet pipe 11 through the circulating water hole 9 on the other side to complete the heat dissipation.

[0024] Bearing lubrication: Regularly replenish grease through oil filling hole 6 to ensure lubrication of bearing 1.

[0025] Composite seal: Oil seal 24 prevents bearing lubricating oil from leaking downwards; sealing packing 23 is pressed by packing gland 13 to achieve dynamic sealing between pump shaft 16 and sealing gland 12, which further prevents lubricating grease from leaking downwards due to high temperature and prevents high temperature gas in connecting pipe 15 from entering bearing 1, thus better protecting bearing 1.

[0026] In Example 2, based on Example 1, a sand-cleaning port 27 is provided at the cooling ring platform 7 opposite to the notch. Sealing plates 10 are provided at both the sand-cleaning port 27 and the two circulating water holes 9. The two sealing plates 10 on the circulating water holes 9 are fixedly connected to the cooling water inlet pipe 5 and the cooling water outlet pipe 11, respectively. Sealing gaskets are provided between the sealing plates 10 and the circulating water holes 9 and the sand-cleaning port 27.

[0027] Cooling water inlet pipe 5 is located at the lower part of sealing plate 10, and cooling water outlet pipe 11 is located at the upper part of sealing plate 10. A vent hole 26 is provided in the middle of bearing body 4, and a vent plug is threadedly connected to the vent hole 26. A drain hole 25 is provided at the bottom of cooling chamber 14, and a drain plug is threadedly connected to the drain hole 25. Before periodically replenishing grease through oil filling hole 6, the vent plug needs to be unscrewed to release air. When the high-temperature hot water pump is not used for a long time, the drain plug can be unscrewed to release the cooling water in cooling chamber 14.

[0028] The lower inner hole of the bearing body 4 is provided with a support recess for supporting the sealing cover 12. The inner wall of the cooling cavity 14 corresponding to the outer side of the support recess is conical with an upper diameter smaller than a lower diameter. When the sealing cover 12 is installed, the sealing cover 12 is fixed to the support recess with bolts.

[0029] Multiple reinforcing ribs 2 are fixed to the top of the cooling ring platform 7. The inner side of the reinforcing ribs 2 is fixed to the outer wall of the bearing body 4, and the top of the reinforcing ribs 2 is fixed to the top flange of the bearing body 4. Reinforcing ribs 2 are also provided on the top of the circulating water hole 9 and the sand cleaning port 27. The reinforcing ribs 2 connect the cooling ring platform 7 and the flange of the bearing body 4, improving the rigidity of the cooling ring platform 7 and coping with the impact of high-pressure cooling media.

[0030] Two semi-circular fixing clamps 21 are fitted on the upper outer side of the water outlet pipe 8, one of which is fixed to the top of the fixing plate 22.

[0031] A bracket 19 is fixed to the bottom of the pump body 18, and a clamping round nut is provided on the pump shaft 16 above the bearing.

[0032] The upper part of the bearing body 4 is provided with an upper support mechanism 3 that supports the upper part of the pump shaft 16. The upper support mechanism 3 includes a second bearing installed at the top of the inner hole of the connecting pipe. Below the second bearing is an oil baffle ring 33. Above the second bearing is a bearing cover 31 fixed on the bearing body 4. The inner hole of the bearing cover 31 is provided with a bearing sleeve 32. Above the bearing sleeve 32 is a clamping round nut 2 fixed on the pump shaft 16. A labyrinth seal is provided at the upper part of the connection between the bearing sleeve 32 and the bearing cover 31.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0034] In the description of this utility model, the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not require that this utility model must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A submersible high-temperature hot water pump, comprising a motor frame (1), a pump shaft (16), a bearing body (4), a fixed plate (22), a connecting pipe (15), a rear cover (20), an impeller (17), a pump body (18), and a water outlet pipe (8), wherein a bearing is embedded in the lower inner hole of the bearing body (4), and a sealing cap (12) is provided below the bearing, characterized in that: The lower outer side of the bearing body (4) is provided with a cooling ring platform (7), the cooling ring platform (7) is provided with a notch, the cooling ring platform (7) is provided with a cooling chamber (14), the ends of the cooling ring platform (7) on both sides of the notch are provided with circulating water holes (9) that connect to the cooling chamber (14), the two circulating water holes (9) are respectively connected to the cooling water inlet pipe (5) and the cooling water outlet pipe (11), the notch is provided with an oil injection hole (6) for supplying oil to the bearing, the upper part of the inner hole of the sealing cover (12) is provided with an oil seal (24), the lower part of the inner hole of the sealing cover (12) is provided with a sealing packing (23), and the lower part of the sealing packing (23) is provided with a packing cover (13).

2. The submersible high-temperature hot water pump according to claim 1, characterized in that: A sand cleaning port (27) is provided at the cooling ring platform (7) opposite to the gap. A sealing plate (10) is provided at both the sand cleaning port (27) and the two circulating water holes (9). The two sealing plates (10) on the circulating water holes (9) are fixedly connected to the cooling water inlet pipe (5) and the cooling water outlet pipe (11) respectively.

3. The submersible high-temperature hot water pump according to claim 2, characterized in that: The cooling water inlet pipe (5) is located at the lower part of the sealing plate (10), the cooling water outlet pipe (11) is located at the upper part of the sealing plate (10), the bearing body (4) is provided with a vent hole (26) in the middle, and a vent plug is threaded to the vent hole (26). The bottom of the cooling chamber (14) is provided with a drain hole (25), and a drain plug is threaded to the drain hole (25).

4. The submersible high-temperature hot water pump according to claim 1, characterized in that: The lower inner hole of the bearing body (4) is provided with a support recess for supporting the sealing cover (12), and the inner wall of the cooling cavity (14) corresponding to the outer side of the support recess is a cone with a diameter at the upper end smaller than that at the lower end.

5. The submersible high-temperature hot water pump according to claim 2, characterized in that: Multiple reinforcing ribs (2) are fixed on the top of the cooling ring platform (7). The inner side of the reinforcing ribs (2) is fixed to the outer wall of the bearing body (4), and the top of the reinforcing ribs (2) is fixed to the top flange of the bearing body (4). The top of the circulating water hole (9) and the sand cleaning port (27) are both provided with reinforcing ribs (2).

6. The submersible high-temperature hot water pump according to claim 5, characterized in that: Two semi-circular fixing clamps (21) are fitted on the upper outer side of the water outlet pipe (8), one of which is fixed to the top of the fixing plate (22).

7. The submersible high-temperature hot water pump according to claim 1, characterized in that: A bracket (19) is fixed to the bottom of the pump body (18), and a clamping round nut is provided on the pump shaft (16) above the bearing.

8. The submersible high-temperature hot water pump according to claim 7, characterized in that: The upper part of the bearing body (4) is provided with an upper support mechanism (3) supporting the upper part of the pump shaft (16). The upper support mechanism (3) includes a bearing two installed at the top of the inner hole of the connecting pipe. The bearing two is provided with an oil baffle ring (33) below it. The bearing two is provided with a bearing cover (31) fixed on the bearing body (4) above it. The bearing cover (31) is provided with a bearing sleeve (32) in the inner hole. The bearing sleeve (32) is provided with a clamping round nut two fixed on the pump shaft (16) above it. A labyrinth seal is provided at the upper part of the connection between the bearing sleeve (32) and the bearing cover (31).

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