Water-cooled thin oil lubrication pump

Abstract

The utility model provides a kind of water-cooled oil lubrication pump, it is related to pump technical field, including pump body, rotor structure, bearing. Among them, pump body is equipped with first bearing seat;Rotor structure includes pump shaft, impeller;Bearing includes first bearing, second bearing;The outer ring of first bearing and second bearing is assembled on first bearing seat, the inner ring of first bearing and second bearing is assembled on pump shaft;First bearing seat is equipped with first oil cavity, and first oil cavity surrounds first bearing and second bearing around the circumference of bearing;First oil cavity is injected with lubricating oil;The bearing inner space of first bearing, second bearing is communicated with first oil cavity, and lubricating oil can flow exchange between bearing inner space and first oil cavity communication;First bearing seat is also arranged with water cooling channel, for the cooling water to cool the lubricating oil in first oil cavity is passed into. When operating, first bearing and second bearing can continuously and efficiently transmit heat, not easy to damage.

Description

Technical Field

[0001] This application relates to the field of pump technology, and in particular to a water-cooled thin oil lubrication pump. Background Technology

[0002] High-lift pumps are typically used in mines, water supply systems, or industrial processes where downtime costs are high. Therefore, frequent failures should be avoided to extend equipment lifespan and reduce maintenance costs. High-lift pumps usually operate under high loads, and under these conditions, the bearings experience extremely high internal contact stress, leading to increased frictional losses and the generation of substantial heat. The heat dissipation design of ordinary pump bearings is unsuitable for high-lift pumps. As a result, the bearings of high-lift pumps generate significant heat during operation, making them prone to damage. Utility Model Content

[0003] The technical problem to be solved by this application is to provide a water-cooled thin oil lubrication pump to address the above-mentioned shortcomings of the prior art.

[0004] A water-cooled thin oil lubrication pump, the water-cooled thin oil lubrication pump comprising:

[0005] The pump body is equipped with a first bearing housing;

[0006] The rotor structure includes a pump shaft and an impeller; the pump shaft passes through the internal space of the pump body, and the impeller is arranged on the pump shaft;

[0007] The bearing includes a first bearing and a second bearing; the outer rings of the first bearing and the second bearing are assembled on the first bearing housing, and the inner rings of the first bearing and the second bearing are assembled on the pump shaft;

[0008] The first bearing housing is provided with a first oil cavity, which surrounds the first bearing and the second bearing in a circumferential manner; the first oil cavity is filled with lubricating oil; the internal space of the first bearing and the second bearing is in communication with the first oil cavity, and the lubricating oil can flow and exchange between the internal space of the bearing and the communication between the first oil cavity.

[0009] The first bearing housing is also provided with a water cooling channel for introducing cooling water to cool the lubricating oil in the first oil chamber.

[0010] Optionally, the water-cooling channel surrounds the first oil cavity in a circumferential manner; the bottom of the water-cooling channel is provided with a water inlet, and the top of the water-cooling channel is provided with a water outlet.

[0011] Optionally, the first bearing housing includes an outer support and an inner support; both the outer support and the inner support are circumferential structures, and the outer support is sleeved on the outer periphery of the inner support;

[0012] The first oil chamber is disposed on the inner support, and the water cooling channel is disposed between the outer support and the inner support; the water inlet and the water outlet are arranged on the outer support.

[0013] Optionally, a gap space is formed between the first bearing and the second bearing; a connecting hole is provided between the gap space and the first oil cavity, the connecting hole being located at the bottom of the gap space and extending downward into the first oil cavity.

[0014] Optionally, the first bearing housing includes a support, a spacer ring, and a positioning element, wherein the spacer ring is located between the outer ring of the first bearing and the outer ring of the second bearing, and the first oil cavity is located in the support;

[0015] At the bottom of the space, the positioning element is inserted sequentially into the openings on the support and the spacer ring to restrict the relative rotation between the support and the spacer ring; the connecting hole is arranged on the positioning element.

[0016] Optionally, the positioning element is a set screw.

[0017] Optionally, the pump body further includes an end cover located at the end of the pump body; the end cover is mounted on the first bearing housing, and a second oil cavity is formed between the end cover and the second bearing; wherein the second bearing is located on the side of the first bearing closer to the end cover.

[0018] Optionally, the end cap is provided with an oil injection hole and a plug.

[0019] Optionally, the end cap is also provided with an observation window for observing the liquid level of the oil in the second oil chamber.

[0020] Optionally, the pump body is further provided with a second bearing housing and a third bearing; the outer ring of the third bearing is mounted on the second bearing housing, and the inner ring of the third bearing is mounted on the pump shaft;

[0021] The first bearing housing is located near the first end of the pump shaft, and the second bearing housing is located near the second end of the pump shaft.

[0022] When the rotor structure operates at high speed, the first and second bearings generate a large amount of heat, especially in high-speed operating environments. The lubricating oil in the first oil chamber can carry away the heat from the bearings while lubricating them. As the first and second bearings operate, the temperature of the lubricating oil in the first oil chamber rises. A water-cooling channel is also arranged on the first bearing housing for the introduction of cooling water, which continuously carries away the heat from the lubricating oil in the first oil chamber. Therefore, when the rotor structure operates at high speed, the heat generated by the first and second bearings can be transferred to the cooling water through the lubricating oil, and the flowing cooling water continuously transfers the heat away. The water-cooled thin oil lubrication pump provided in this application allows the first and second bearings to continuously and efficiently transfer heat during operation, making them less prone to damage. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a water-cooled thin oil lubrication pump in an embodiment of this application.

[0024] Figure 2 This is a partial structural schematic diagram of the water-cooled thin oil lubrication pump in the embodiments of this application.

[0025] Figure 3 This is another partial structural schematic diagram of the water-cooled thin oil lubrication pump in the embodiments of this application.

[0026] Reference numerals: Pump body 10, first bearing housing 11, outer support 111, inner support 112, spacer ring 113, positioning element 114, end cover 12, oil injection hole 121, observation window 122, second bearing housing 13, rotor structure 20, pump shaft 21, impeller 22, first bearing 31, second bearing 32, third bearing 33, first oil chamber 41, water cooling channel 42, water inlet 43, water outlet 44, spacer space 45, connecting hole 46, second oil chamber 47. Detailed Implementation

[0027] The following are specific embodiments of this application, described in conjunction with the accompanying drawings, to further illustrate the technical solutions of this application. However, this application is not limited to these embodiments. In the following description, specific details such as particular configurations and components are provided merely to aid in a comprehensive understanding of the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope of protection of this application. Furthermore, for clarity and brevity, descriptions of known functions and structures have been omitted.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0029] It should be noted that high-lift pumps typically operate under high load conditions. Under high load, the bearings experience extremely high internal contact stress, leading to increased frictional losses and the generation of substantial heat. The heat dissipation design of ordinary pump bearings is unsuitable for the high-pressure operating environment of high-lift pumps. Consequently, the bearings of high-lift pumps generate significant heat during operation, making them prone to damage.

[0030] The water-cooled thin oil lubrication pump provided in this application is applicable to high-lift pumps. During operation, the first and second bearings can continuously and efficiently transfer heat away, making them less prone to damage. The water-cooled thin oil lubrication pump provided in this application will be described in detail below with reference to the accompanying drawings.

[0031] refer to Figures 1-3 The water-cooled thin oil lubrication pump includes a pump body 10, a rotor structure 20, and bearings. The pump body 10 is provided with a first bearing housing 11. The rotor structure 20 includes a pump shaft 21 and an impeller 22; the pump shaft 21 passes through the internal space of the pump body 10, and the impeller 22 is arranged on the pump shaft 21. The bearings include a first bearing 31 and a second bearing 32; the outer rings of the first bearing 31 and the second bearing 32 are assembled on the first bearing housing 11, and the inner rings of the first bearing 31 and the second bearing 32 are assembled on the pump shaft 21.

[0032] The first bearing housing 11 is provided with a first oil chamber 41, which surrounds the first bearing and the second bearing 32 around the circumference of the bearing. The first oil chamber 41 is filled with lubricating oil. The internal spaces of the first bearing 31 and the second bearing 32 are in communication with the first oil chamber 41, and the lubricating oil can flow and exchange between the internal spaces of the bearings and the first oil chamber 41. A water-cooling channel 42 is also arranged on the first bearing housing 11 for introducing cooling water to cool the lubricating oil in the first oil chamber 41.

[0033] When the rotor structure 20 operates at high speed, the first bearing 31 and the second bearing 32 generate a large amount of heat, especially in high-speed operating environments. The lubricating oil in the first oil chamber 41 can carry away the heat of the bearings while lubricating them. As the first bearing 31 and the second bearing 32 operate, the temperature of the lubricating oil in the first oil chamber 41 rises. A water-cooling channel 42 is also arranged on the first bearing housing 11 for introducing cooling water. The cooling water in the water-cooling channel 42 can continuously carry away the heat of the lubricating oil in the first oil chamber 41. Therefore, when the rotor structure 20 operates at high speed, the heat generated by the first bearing 31 and the second bearing 32 can be transferred to the cooling water through the lubricating oil, and the flowing cooling water can continuously transfer the heat away. The water-cooled thin oil lubrication pump provided in this application can continuously and efficiently transfer heat away from the first and second bearings during operation, keeping the first and second bearings at a suitable operating temperature and preventing damage.

[0034] In one embodiment of this application, the internal spaces of the first bearing 31 and the second bearing 32 are connected to the first oil chamber 41, and lubricating oil can flow and exchange between the internal spaces of the bearings and the first oil chamber 41. During operation, friction exists between the rolling elements and raceways, and between the cage and the rolling elements inside the bearing. Furthermore, the higher the rotational speed, the higher the frequency of friction per unit time, and the more heat is generated. The lubricating oil in the internal space of the bearing can quickly absorb the heat generated inside the bearing and transfer it to the first oil chamber 41.

[0035] In one embodiment of this application, a water-cooling channel 42 surrounds the first oil cavity 41 circumferentially. The bottom of the water-cooling channel 42 has an inlet 43, and the top of the water-cooling channel 42 has an outlet 44. A cooling water inlet pipe is connected to the inlet 43, and a cooling water return pipe is connected to the outlet 44. During operation, cooling water is injected into the inlet 43 through the inlet pipe. After entering the water-cooling channel 42, the cooling water is gradually transported upwards along the channel until it is discharged from the outlet 44 at the top. During this process, the cooling water can flow upwards along the water-cooling channel 42, effectively exchanging heat with the first oil cavity 41 and carrying away the heat from the lubricating oil in the first oil cavity 41.

[0036] In one embodiment of this application, the first bearing housing 11 includes an outer support 111 and an inner support 112; both the outer support 111 and the inner support 112 are circumferential structures, and the outer support 111 is sleeved on the outer periphery of the inner support 112. A first oil cavity 41 is disposed on the inner support 112, and a water-cooling channel 42 is disposed between the outer support 111 and the inner support 112; a water inlet 43 and a water outlet 44 are arranged on the outer support 111. (Reference) Figure 1 The outer support 111 is fixedly connected to the other parts of the pump body, and the inner support 112 is sleeved in the outer support 111.

[0037] In one embodiment of this application, a space 45 is formed between the first bearing 31 and the second bearing 32; a connecting hole 46 is provided between the space 45 and the first oil cavity 41, the connecting hole 46 being located at the bottom of the space 45 and extending downward into the first oil cavity 41. In this structure, lubricating oil can flow and exchange heat between the space 45 and the first oil cavity 41 through the connecting hole 46.

[0038] refer to Figure 2 In some optional embodiments, a connecting hole 46 is machined on the first bearing housing 11. Specifically, the spacer ring 113 and the inner support 112 are machined with through holes at corresponding positions to jointly form the connecting hole 46.

[0039] refer to Figure 3In some optional embodiments, the first bearing housing 11 includes a support, a spacer ring 113, and a positioning element 114. The spacer ring 113 is located between the outer ring of the first bearing 31 and the outer ring of the second bearing 32, and the first oil cavity 41 is located in the support. At the bottom of the spacer space 45, the positioning element 114 is sequentially inserted into openings in the support and the spacer ring 113 to restrict relative rotation between the support and the spacer ring 113; a connecting hole 46 is arranged on the positioning element 114. In one embodiment of this application, the positioning element 114 is a set screw.

[0040] Specifically, the support may include an outer support 111 and an inner support 112; both the outer support 111 and the inner support 112 are circumferential structures, with the outer support 111 sleeved around the outer periphery of the inner support 112. The first oil cavity 41 is disposed on the inner support 112, and the water-cooling channel 42 is disposed between the outer support 111 and the inner support 112; the water inlet 43 and the water outlet 44 are arranged on the outer support 111. The positioning member 114 is inserted sequentially into the openings on the inner support 112 and the spacer ring 113, thereby restricting the rotation of the spacer ring 113. At the same time, the positioning member 114 is a hollow structure, with a connecting hole 46 formed inside to connect the spacer space 45 and the first oil cavity 41.

[0041] In one embodiment of this application, the pump body 10 further includes an end cap 12, which is located at the end of the pump body 10. The end cap 12 is mounted on a first bearing seat 11, and a second oil cavity 47 is formed between the end cap 12 and the second bearing 32. The second bearing 32 is located on the side of the first bearing 31 closest to the end cap 12. In some technical solutions, the end cap 12 is provided with an oil filling hole 121 and a plug. In some technical solutions, the end cap 12 is also provided with an observation window 122 for observing the oil level in the second oil cavity 47.

[0042] Specifically, the second oil chamber 47 is located to the side of the second bearing 32 and can communicate with the internal bearing spaces of the first bearing 31 and the second bearing 32, thereby communicating with the first oil chamber 41. Therefore, the internal bearing spaces of the second oil chamber 47, the first oil chamber 41, the first bearing 31, and the second bearing 32 are interconnected. Operators can add lubricating oil through the oil filling hole 121 on the end cover 12 and observe the lubricating oil level through the observation window 122.

[0043] In one embodiment of this application, the pump body 10 is further provided with a second bearing seat 13 and a third bearing 33; the outer ring of the third bearing 33 is mounted on the second bearing seat 13, and the inner ring of the third bearing 33 is mounted on the pump shaft 21; the first bearing seat 11 is located near the first end of the pump shaft 21, and the second bearing seat 13 is located near the second end of the pump shaft 21.

[0044] In some embodiments of this application, the impeller mounted on the rotor structure 20 is a centrifugal pump impeller. The rotor structure 20 is equipped with multiple impellers, forming a multi-stage centrifugal pump. The multi-stage centrifugal pump utilizes the rotation of the impeller to cause centrifugal motion of water. Before starting the centrifugal pump, the pump body and suction pipe are filled with water. Then, the motor is started, causing the pump shaft to drive the impeller and water to rotate at high speed. The water undergoes centrifugal motion and is thrown towards the outer edge of the impeller, flowing into the pump's discharge pipe through the flow channel of the volute casing. When the multi-stage centrifugal pump is working, the pumped liquid enters the pump body through the inlet. Due to the action of the impeller, both the kinetic and potential energy of the liquid increase. After entering the guide vanes, some of the kinetic energy is converted into potential energy (each impeller stage is equipped with a guide vane). The counter-blades of the guide vanes, under favorable hydraulic characteristics, transport the liquid to the inlet of the next impeller stage. Each stage increases the pressure by the same amount. After passing through the final stage guide vane, the liquid is discharged from the outlet. The water pressure of a multistage centrifugal pump is achieved by the superposition of impellers at each stage, thus resulting in a larger outlet pressure and forming a high-head pump.

[0045] Additionally, it should be noted that the rotor structure is the rotating part within the pump body, including the pump shaft, multi-stage impellers, and other components that rotate with the pump shaft. Multiple gap seals are installed at different locations within the rotor structure and pump body, utilizing the minute gaps between them for sealing.

[0046] In summary, in the technical solution provided by this application, the first and second bearings generate a large amount of heat when the rotor structure operates at high speed, especially in high-speed operating environments. The lubricating oil in the first oil chamber can carry away the heat of the bearings while lubricating them. As the first and second bearings operate, the temperature of the lubricating oil in the first oil chamber rises. A water-cooling channel is also arranged on the first bearing housing for introducing cooling water, which continuously carries away the heat of the lubricating oil in the first oil chamber. Therefore, when the rotor structure operates at high speed, the heat generated by the first and second bearings can be transferred to the cooling water through the lubricating oil, and the flowing cooling water can continuously transfer the heat away. The water-cooled thin oil lubrication pump provided by this application can continuously and efficiently transfer heat away from the first and second bearings during operation, and is not easily damaged.

[0047] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0049] The specific embodiments described herein are merely illustrative examples of the technical solutions of this application. Those skilled in the art to which this application pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, but without departing from the scope defined by the claims of this application.

Claims

1. A water-cooled thin oil lubrication pump characterized by comprising: The water-cooled thin oil lubrication pump includes: The pump body is equipped with a first bearing housing; The rotor structure includes a pump shaft and an impeller; the pump shaft passes through the internal space of the pump body, and the impeller is arranged on the pump shaft; The bearing includes a first bearing and a second bearing; the outer rings of the first bearing and the second bearing are assembled on the first bearing housing, and the inner rings of the first bearing and the second bearing are assembled on the pump shaft; The first bearing housing is provided with a first oil cavity, which surrounds the first bearing and the second bearing in a circumferential manner; the first oil cavity is filled with lubricating oil; the internal space of the first bearing and the second bearing is in communication with the first oil cavity, and the lubricating oil can flow and exchange between the internal space of the bearing and the communication between the first oil cavity. The first bearing housing is also provided with a water-cooling channel for introducing cooling water to cool the lubricating oil in the first oil chamber.

2. The water-cooled thin oil lubrication pump according to claim 1, characterized by The water-cooling channel surrounds the first oil cavity in a circumferential manner; the bottom of the water-cooling channel is provided with a water inlet, and the top of the water-cooling channel is provided with a water outlet.

3. The water-cooled thin oil lubrication pump according to claim 2, characterized by The first bearing housing includes an outer support and an inner support; both the outer support and the inner support are circumferential structures, and the outer support is sleeved on the outer periphery of the inner support; The first oil chamber is disposed on the inner support, and the water cooling channel is disposed between the outer support and the inner support; the water inlet and the water outlet are arranged on the outer support.

4. The water cooled thin oil lubrication pump according to claim 1, characterized by A gap space is formed between the first bearing and the second bearing; a connecting hole is provided between the gap space and the first oil cavity, the connecting hole being located at the bottom of the gap space and extending downward into the first oil cavity.

5. The water cooled thin oil lubrication pump according to claim 4, characterized in that, The first bearing housing includes a support, a spacer ring, and a positioning element. The spacer ring is located between the outer ring of the first bearing and the outer ring of the second bearing, and the first oil cavity is located in the support. At the bottom of the space, the positioning element is inserted sequentially into the openings on the support and the spacer ring to restrict the relative rotation between the support and the spacer ring; the connecting hole is arranged on the positioning element.

6. The water-cooled thin oil lubrication pump according to claim 5, wherein The positioning element is a set screw.

7. The water cooled thin oil lubrication pump according to claim 1, wherein The pump body also includes an end cover located at the end of the pump body; the end cover is assembled on the first bearing seat, and a second oil cavity is formed between the end cover and the second bearing; wherein the second bearing is located on the side of the first bearing closer to the end cover.

8. The water-cooled thin oil lubrication pump according to claim 7, characterized by The end cap is provided with an oil injection hole and a plug.

9. The water cooled thin oil lubrication pump according to claim 7, wherein The end cap is also provided with an observation window for observing the level of oil in the second oil chamber.

10. The water cooled thin oil lubrication pump according to claim 1, wherein The pump body is also provided with a second bearing housing and a third bearing; the outer ring of the third bearing is assembled on the second bearing housing, and the inner ring of the third bearing is assembled on the pump shaft; The first bearing housing is located near the first end of the pump shaft, and the second bearing housing is located near the second end of the pump shaft.

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