Vertical high-flow mixed-flow pump of bimodal bearing cooling system based on shaft driving

Abstract

The utility model discloses a vertical high-flow mixed-flow pump of a bimodal bearing cooling system based on shaft driving, which comprises a suction inlet, a pump body, a pump body wear ring, an impeller wear ring, an impeller, a pump cover, a mechanical seal, a lower-gear oil bushing, a guide bearing seat, a shaft sleeve, a guide bearing, a sliding bearing gland, a lower bearing isolator, an upper-gear oil bushing and a pump shaft, the suction inlet is connected with the pump body through a bolt, the pump body is supported by a vertical footing, the impeller and the pump shaft are positioned through a spigot and are fixed through six inner hexagon screws, and a pump body wear ring and an impeller wear ring are fixed to the pump body and the impeller respectively. The water cooling coil pipe and the pump shaft fan can carry out liquid cooling-air cooling dual-mode cooling on thin oil in the bearing sleeve thin oil circulation channel so as to achieve efficient cooling on the bearing, the structure is reasonable, the design is ingenious, reliability is high, operation is stable, the problem that the bearing is overheated when a large-flow mixed-flow pump is operated under continuous high load is solved, and the service life of the large-flow mixed-flow pump is prolonged. And localization of the large-flow mixed-flow pump is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid transportation, in particular to a vertical large-flow mixed-flow pump of a dual-mode bearing cooling system based on shaft drive. Background Art

[0002] Mixed flow pumps have the characteristics of low head and large flow, and are suitable for high-efficiency suction and delivery of clean water or liquids with physical and chemical properties similar to water. They are especially suitable for farmland irrigation and drainage systems, circulating water transportation in thermal power plants, urban water supply and drainage systems, dock water level adjustment, and other water conservancy projects involving large-flow water treatment. In these applications, the reliability of mixed flow pumps is crucial, especially in continuous operation or in harsh working environments. When traditional mixed flow pumps are under high load or continuous operation, thermal management of bearings becomes a challenge, and overheating may cause problems such as reduced efficiency and equipment failure. Therefore, there is an urgent need to create a new bearing cooling system to reduce the bearing temperature rise, extend the bearing service life, improve the stability and reliability of vertical mixed flow pumps, and reduce customer maintenance costs.

[0003] In view of this, the present utility model is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a vertical large-flow mixed-flow pump with a dual-mode bearing cooling system based on shaft drive, which has a reasonable structure, ingenious design, high reliability and stable operation, solves the problem of bearing overheating of large-flow mixed-flow pumps under continuous high-load operation, is conducive to the localization of large-flow mixed-flow pumps, and has broad application prospects.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a vertical large-flow mixed-flow pump with a dual-mode bearing cooling system based on shaft drive, including a suction port, a pump body, a pump body mouth ring, an impeller mouth ring, an impeller, a pump cover, a mechanical seal, a lower oil bushing, a guide bearing seat, a shaft sleeve, a guide bearing, a sliding bearing gland, a lower bearing isolator, a lower locking nut, an upper oil bushing, a bearing sleeve, a deep groove ball bearing, an upper locking nut, a fan, a pump shaft, an upper bearing isolator, a bearing gland, a thrust roller bearing, an O-ring 1, a water cooling coil, an O-ring 2, a bearing housing, a support plate, a bearing bracket and an O-ring Third, the suction port is connected to the pump body by bolts, the pump body adopts a vertical foot support method, the impeller and the pump shaft are positioned by a stopper, and six hexagon socket screws are used to fix the two to ensure the reliability of torque transmission, the pump body and the impeller are respectively fixed with a pump body mouth ring and an impeller mouth ring, the pump cover and the mechanical seal are connected by bolts, a set of sliding bearings is provided in the bearing bracket, which supports the pump rotor to reduce pump vibration, and adopts thin oil lubrication and cooling, the sliding bearing includes a sleeve and a guide bearing, the sleeve is installed inside the guide bearing seat, and the circumference of the sleeve The guide bearing is provided with an annular oil storage tank, and the sleeve is fixed with a lower locking nut. A lower bearing isolator for oil sealing is installed between the lower locking nut and the sliding bearing gland. The lower oil bushing is installed under the bearing bracket, and three pairs of O-rings are used to seal the oil. The bearing sleeve is fixed with an upper locking nut. An upper bearing isolator for oil sealing is installed between the upper locking nut and the bearing gland. The lower gear oil bushing is installed below the bearing housing and is sealed with a pair of O-rings for thin oil. The bearing housing is equipped with a bearing capable of withstanding high loads of axial force and radial force. The bearing comprises a thrust roller bearing and a deep groove ball bearing. The inner rings of the thrust roller bearing and the deep groove ball bearing are installed on the outer stop of the bearing sleeve. The outer stop of the bearing sleeve is provided with an oil return hole. The outer ring of the thrust roller bearing is installed into the inner hole of the bearing housing. The bearing gland and the bearing housing are sealed with two O-rings. A water cooling coil is provided inside the bearing housing, and a fan is provided above the bearing gland.

[0006] Preferably, the shaft sleeve, guide bearing, bearing bracket, lower locking nut, bearing isolator, O-ring three, upper locking nut, bearing sleeve, sliding bearing cover, upper bearing isolator, lower oil bushing, bearing housing, O-ring one, oil return hole, O-ring two, water cooling coil, fan and thin oil lubrication cooling circulation channel together constitute a dual-mode bearing cooling system.

[0007] Preferably, the thrust roller bearing is arranged on the side of the pump shaft close to the impeller, and the deep groove ball bearing is arranged on the driving end side of the pump shaft, and the span between the thrust roller bearing and the deep groove ball bearing is 150-300 mm.

[0008] Preferably, a plurality of inclined holes are evenly distributed on the circumference of the sleeve, and the diameter of the inclined holes is

[0009] Preferably, the four U-shaped grooves and one rectangular groove constitute an annular oil storage groove.

[0010] Preferably, the water cooling coil has three or more coils, one end of which is a cooling water inlet and the other end is a cooling water outlet.

[0011] Preferably, a plurality of heat dissipation ribs are evenly distributed on the top of the bearing gland.

[0012] The utility model provides a vertical large-flow mixed-flow pump for a dual-mode bearing cooling system based on shaft drive, which has the following beneficial effects.

[0013] 1. The utility model has reasonable structure, ingenious design, high reliability, stable operation, and can achieve performance parameters ranging from flow rate 60-20000m 3 / h, head 5-30m, which is conducive to promoting the localization of large-flow mixed-flow pumps.

[0014] 2. The utility model proposes an innovative dual-mode bearing cooling system, which combines water cooling and air cooling technical solutions. When the pump shaft 20 rotates, the thin oil forms a circulation loop through the two oil channels on the bearing sleeve, and is water-cooled by the water-cooling coil 25 in the bearing housing 27. At the same time, the fan 19 can be driven by the rotation of the pump shaft 20 to cool it by air. The combination of the above two cooling methods can efficiently take away the heat generated by the deep groove ball bearing 17 and the thrust roller bearing 23, greatly reducing their temperature, ensuring the performance and reliability of the mixed flow pump in various applications, extending the service life of the equipment and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a vertical high-flow mixed-flow pump of a shaft-driven dual-mode bearing cooling system provided by the utility model;

[0016] Figure 2 for Figure 1 A partial enlarged view of part A;

[0017] Figure 3 A schematic diagram of a water cooling coil structure of a vertical large-flow mixed-flow pump of a shaft-driven dual-mode bearing cooling system provided by the utility model;

[0018] Figure 4 A schematic diagram of the guide bearing structure of a vertical large-flow mixed-flow pump of a shaft-driven dual-mode bearing cooling system provided by the utility model;

[0019] Figure 5 A schematic diagram of the shaft sleeve structure of a vertical large-flow mixed-flow pump of a shaft-driven dual-mode bearing cooling system provided by the utility model;

[0020] Figure 6 A schematic diagram of the bearing sleeve structure of a vertical large-flow mixed-flow pump of a shaft-driven dual-mode bearing cooling system provided by the utility model;

[0021] Figure 7 The utility model provides a schematic diagram of the bearing gland structure of a vertical large-flow mixed-flow pump of a shaft-driven dual-mode bearing cooling system.

[0022] In the figure:

[0023] 1. Suction port 2. Pump body 3. Pump body mouth ring 4. Impeller mouth ring 5. Impeller 6. Pump cover 7. Mechanical seal 8. Lower oil bushing 9. Guide bearing seat 10. Bushing 11. Guide bearing 12. Sliding bearing gland 13. Lower bearing isolator 14. Lower locking nut 15. Upper oil bushing 16. Bearing sleeve 17. Deep groove ball bearing 18. Upper locking nut 19. Fan 20. Pump shaft 21. Upper bearing isolator 22. Bearing gland 23. Thrust roller bearing 24. O-ring one 25. Water cooling coil 26. O-ring two 27. Bearing housing 28. Support plate 29. Bearing bracket 30. O-ring three 31. Heat sink rib 32. Cooling water inlet 33. Cooling water outlet 34. U-shaped groove 35. Rectangular groove 36. Oblique hole 37. Oil return hole DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with specific embodiments and drawings to help understand the content of the present invention.

[0025] like Figure 1-Figure 2The figures are the structural schematic diagram of a vertical high-flow mixed flow pump of a dual-mode bearing cooling system based on shaft drive provided by the utility model and the partial enlarged diagram of part A. The vertical high-flow mixed flow pump comprises a suction port 1, a pump body 2, a pump body mouth ring 3, an impeller mouth ring 4, an impeller 5, a pump cover 6, a mechanical seal 7, a lower oil bushing 8, a guide bearing seat 9, a sleeve 10, a guide bearing 11, a sliding bearing gland 12, a lower bearing isolator 13, a lower locking nut 14, an upper oil bushing 15, a bearing sleeve 16, a deep groove ball bearing 17, an upper locking nut 18, a fan 19, a pump shaft 20, an upper bearing isolator 21, a bearing gland 22, a thrust roller bearing 23, an O-ring 1 24, a water cooling coil 25, an O-ring 2 26, a bearing housing 27, a support plate 28, a bearing bracket 29 and an O-ring 3 30, and the suction port 1 is connected to the pump body 2 by bolts.

[0026] The pump body 2 adopts a vertical foot support method, the impeller 5 and the pump shaft 20 are positioned by a stopper, and the two are fixed by six hexagon socket screws to ensure the reliability of torque transmission, the pump body 2 and the impeller 5 are respectively fixed with a pump body ring 3 and an impeller ring 4, the pump cover 6 and the mechanical seal 7 are connected by bolts, a set of sliding bearings is provided in the bearing bracket 29, which supports the pump rotor to reduce pump vibration, and adopts thin oil lubrication and cooling, the sliding bearing includes a sleeve 10 and a guide bearing 11, and the sleeve 10 is installed inside the guide bearing seat 9.

[0027] like Figure 5 FIG. 1 is a schematic diagram of the shaft sleeve structure of a vertical high-flow mixed-flow pump of a shaft-driven dual-mode bearing cooling system provided by the utility model. Twelve inclined holes 36 are evenly distributed on the circumference of the shaft sleeve 10, and the diameter of the inclined holes 36 is When the shaft sleeve 10 rotates, the thin oil flows upward along the radial small gap back to the oil chamber of the bearing support 29, thereby forming a thin oil lubrication and cooling circulation route.

[0028] like Figure 4The figure is a schematic diagram of the guide bearing structure of a vertical large-flow mixed-flow pump based on a shaft-driven dual-mode bearing cooling system provided by the utility model. An annular oil storage tank is provided in the guide bearing 11, and the annular oil storage tank includes four U-shaped grooves 34 and one rectangular groove 35. The shaft sleeve 10 is fixed by a lower locking nut 14, and a lower bearing isolator 13 for thin oil sealing is installed between the lower locking nut 14 and the sliding bearing cover 12. The lower oil bushing 8 is installed below the bearing bracket 29, and the thin oil is sealed by an O-ring 30. The bearing sleeve 16 is fixed by an upper locking nut 18, and an upper bearing isolator 21 for thin oil sealing is installed between the upper locking nut 18 and the bearing cover 22. The lower oil bushing 8 is installed below the bearing housing 27, and the thin oil is sealed by an O-ring 24. The bearing housing 27 is equipped with a bearing capable of withstanding high axial and radial loads, and the bearings include a thrust roller bearing 23 and a deep groove ball bearing 17, and the inner rings of the thrust roller bearing 23 and the deep groove ball bearing 17 are installed on the outer stop of the bearing sleeve 16.

[0029] like Figure 6 The figure shows a schematic diagram of the bearing sleeve structure of a vertical large-flow mixed-flow pump based on a shaft-driven dual-mode bearing cooling system provided by the utility model. The outer stop of the bearing sleeve 16 is provided with an oil return hole 37, the outer ring of the thrust roller bearing 23 is installed into the inner hole of the bearing housing 27, the bearing gland 22 and the bearing housing 27 are sealed by an O-ring 26, the thrust roller bearing 23 is arranged on the side of the pump shaft 20 close to the impeller 5, the deep groove ball bearing 17 is arranged on the driving end side of the pump shaft 20, the thrust roller bearing 23 and the deep groove ball bearing 17 have a short span, and the span range is 150-300mm. The bearing housing 27 is provided with a water cooling coil 25 inside.

[0030] like Figure 3 The figure shows a schematic diagram of the water cooling coil structure of a vertical large flow mixed flow pump of a shaft-driven dual-mode bearing cooling system provided by the utility model. The water cooling coil 25 has three or more turns, one end is a cooling water inlet 32, and the other end is a cooling water outlet 33. A fan 19 is provided above the bearing gland 22.

[0031] like Figure 7 , which is a schematic diagram of the bearing gland structure of a vertical high-flow mixed-flow pump based on a shaft-driven dual-mode bearing cooling system provided by the utility model. The top of the bearing gland 22 is evenly distributed with a plurality of heat dissipation plate ribs 31 .

[0032] The working principle of the utility model is as follows: when the driving device provides power and the pump shaft 20 rotates, the thin oil forms a circulation loop through the two oil channels on the bearing sleeve 16, and is water-cooled through the water-cooling coil 25 in the bearing housing 27. The rotation of the pump shaft 20 drives the fan 19 to rotate for air cooling, thereby forming a dual-mode bearing cooling system, which can efficiently take away the heat generated by the deep groove ball bearing 17 and the thrust roller bearing 23, thereby greatly reducing their temperature.

[0033] The utility model has reasonable structure, ingenious design, high reliability and stable operation, and can achieve the following performance parameters: flow rate 60-20000m 3 / h, head 5-30m, which is conducive to promoting the localization of large-flow mixed-flow pumps.

[0034] In response to the problem of bearing overheating in traditional mixed flow pumps during high load or continuous operation, the utility model proposes an innovative dual-mode bearing cooling system, which cleverly combines water cooling and air cooling technology, significantly improves the performance and reliability of mixed flow pumps in various applications, extends the service life of the equipment and reduces maintenance costs.

[0035] This article uses specific examples to explain the concept of the utility model in detail, and the description of the above embodiments is only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, any obvious modifications, equivalent substitutions or other improvements made without departing from the concept of the utility model should be included in the scope of protection of the utility model.

Claims

1. A vertical high-flow mixed-flow pump based on a shaft-driven dual-mode bearing cooling system, characterized in that: It includes a suction port, a pump body, a pump body mouth ring, an impeller mouth ring, an impeller, a pump cover, a mechanical seal, a lower oil bushing, a guide bearing seat, a sleeve, a guide bearing, a sliding bearing gland, a lower bearing isolator, a lower locking nut, an upper oil bushing, a bearing sleeve, a deep groove ball bearing, an upper locking nut, a fan, a pump shaft, an upper bearing isolator, a bearing gland, a thrust roller bearing, an O-ring 1, a water cooling coil, an O-ring 2, a bearing housing, a support plate, a bearing bracket and an O-ring 3. The suction port is connected to the pump body by bolts. The pump body adopts a vertical The foot support method is that the impeller and the pump shaft are positioned by a stopper and fixed by six hexagon socket screws. The pump body and the impeller are respectively fixed with a pump body ring and an impeller ring. The pump cover and the mechanical seal are connected by bolts. A set of sliding bearings is arranged in the bearing bracket and lubricated and cooled by thin oil. The sliding bearing includes a sleeve and a guide bearing. The sleeve is installed in the guide bearing seat. The circumference of the sleeve is evenly distributed with oblique holes. When the sleeve rotates, the thin oil is driven to flow upward along the radial gap back to the oil chamber of the bearing bracket. In order to form a thin oil lubrication cooling circulation channel, an annular oil storage tank is arranged in the guide bearing, the shaft sleeve is fixed by a lower locking nut, a lower bearing isolator for thin oil sealing is installed between the lower locking nut and the sliding bearing gland, the lower oil bushing is installed under the bearing bracket, three pairs of O-rings are used to seal the thin oil, the upper locking nut is used to fix the bearing sleeve, an upper bearing isolator for thin oil sealing is installed between the upper locking nut and the bearing gland, the lower oil bushing is installed under the bearing housing, A pair of O-rings are used for sealing of thin oil, and the bearing housing is equipped with bearings capable of withstanding high loads of axial force and radial force, the bearings comprising a thrust roller bearing and a deep groove ball bearing, the inner rings of the thrust roller bearing and the deep groove ball bearing being mounted on the outer stop of the bearing sleeve, the bearing sleeve being axially provided with an oil return hole, the outer ring of the thrust roller bearing being mounted into the inner hole of the bearing housing, the bearing gland and the bearing housing being sealed by two O-rings, a water cooling coil being provided inside the bearing housing, and a fan being provided above the bearing gland.

2. The vertical high-flow mixed-flow pump of the shaft-driven dual-mode bearing cooling system according to claim 1, characterized in that: The shaft sleeve, guide bearing, bearing bracket, lower locking nut, bearing isolator, O-ring three, upper locking nut, bearing sleeve, sliding bearing cover, upper bearing isolator, lower oil bushing, bearing housing, O-ring one, oil return hole, O-ring two, water cooling coil, fan and thin oil lubrication cooling circulation channel together constitute a dual-mode bearing cooling system.

3. The vertical high-flow mixed-flow pump of the shaft-driven dual-mode bearing cooling system according to claim 2, characterized in that: The number of turns of the water cooling coil is three or more, one end of the water cooling coil is a cooling water inlet, and the other end is a cooling water outlet.

4. The vertical high-flow mixed-flow pump of the shaft-driven dual-mode bearing cooling system according to claim 3, characterized in that: The circumference of the sleeve is evenly distributed with a plurality of inclined holes, and the diameter of the inclined holes is 5. The vertical high-flow mixed-flow pump of the shaft-driven dual-mode bearing cooling system according to claim 4, characterized in that: The annular oil storage groove comprises four U-shaped grooves and one rectangular groove.

6. The vertical high-flow mixed-flow pump of the shaft-driven dual-mode bearing cooling system according to claim 5, characterized in that: A plurality of heat dissipation plate ribs are evenly distributed on the top of the bearing gland.

7. A vertical high-flow mixed-flow pump for a dual-mode bearing cooling system based on shaft drive according to claim 6, characterized in that: The thrust roller bearing is arranged on the side of the pump shaft close to the impeller, and the deep groove ball bearing is arranged on the driving end side of the pump shaft. The thrust roller bearing and the deep groove ball bearing have a span of 150-300 mm.

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