Corrosion-resistant centrifugal pump for oil transportation

Abstract

The application relates to the technical field of centrifugal pump lubrication, and particularly provides a corrosion-resistant centrifugal pump for oil transportation, which comprises a pump body, a pump shaft is arranged in the pump body, a bearing box is connected to one end of the pump shaft, the bearing box is filled with lubricating oil, a slinger is fixedly arranged on the part of the pump shaft located in the bearing box, two movable rings are arranged on the outer periphery of the slinger, and the two movable rings are configured to be pushed close to each other by the counterweight on the slinger under the action of centrifugal force when the rotating speed of the pump shaft exceeds a preset value, part of the lubricating oil enters a heat dissipation bin to reduce the liquid level of the lubricating oil in the bearing box and reduce the frictional resistance between the slinger rotating at a high speed and the lubricating oil; when the rotating speed is lower than the preset value, a baffle blocks the slinger flow channel, the liquid level of the lubricating oil is maintained at a normal height, and the movable rings are close to the bearing, so that the lubricating oil can still reach the lubricating part of the bearing even if the slinger force is weak at a low rotating speed, and the bearing can still be continuously and sufficiently lubricated under the low rotating speed condition.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of centrifugal pump lubrication, in particular to a corrosion-resistant centrifugal pump for oil transportation. BACKGROUND

[0002] The corrosion-resistant centrifugal pump is filled with liquid in the pump, the impeller rotates to generate centrifugal force, the liquid in the impeller channel is thrown to the periphery under the action of centrifugal force and flows into the pump shell, so that the pressure at the center of the impeller is reduced, which is lower than the pressure in the water inlet pipe, and the liquid flows into the impeller from the water suction pool under the action of the pressure difference, thereby realizing continuous water suction and supply, which can be applied in oil transportation engineering. When the centrifugal pump is working, the pump shaft rotates at high speed, which needs lubricating oil for cooling and lubrication.

[0003] For example, Chinese patent CN202266484U discloses a centrifugal pump bearing box, which sets a slinger on the pump shaft in the bearing box. When the pump body works, the pump shaft in the bearing box drives the slinger to rotate, and under the action of centrifugal force, the lubricating oil in the bearing box is thrown to the side wall of the bearing box, thereby lubricating and cooling the bearing in the bearing box.

[0004] However, the speed of the centrifugal pump will be adjusted according to the real-time working state when it works. At this time, the oil of the lubricating oil cannot adapt to the speed of the centrifugal pump. For example, when the speed of the centrifugal pump increases, the same liquid level of the lubricating oil will generate greater frictional resistance to the slinger, which will cause the lubricating oil to heat up faster and higher, and will also cause the wear degree of the slinger to increase. If the liquid level of the lubricating oil is low, the speed of the slinger is low at low speed, and the slinger cannot meet the full lubrication of the bearing. SUMMARY

[0005] Therefore, it is necessary to provide a corrosion-resistant centrifugal pump for oil transportation in view of the poor lubrication effect of the current lubricating oil on the centrifugal pump.

[0006] The above-mentioned purpose is realized by the following technical scheme:

[0007] A corrosion-resistant centrifugal pump for oil transportation comprises:

[0008] The utility model relates to a pump body, bearing box and oil flinger are included, the pump body is set up with oil inlet and oil outlet, the pump body inside rotation is provided with pump shaft, the pump shaft one end coaxial and fixedly set up with impeller, the bearing is provided with in bearing box, the bearing with the other end of pump shaft coaxial connection, bearing box one side is provided with drive motor, the drive motor's rotating shaft connects pump shaft, the oil flinger coaxial and fixedly set up in pump shaft, bearing box side wall is provided with heat dissipation bin, the import of heat dissipation bin is located in bearing box above lubricating oil liquid level, the outlet of heat dissipation bin is located below lubricating oil liquid level, the oil flinger periphery is set up with oil throwing flow channel, the oil throwing flow channel is provided with switch subassembly, the switch subassembly is configured to open the oil throwing flow channel when the oil flinger rotation speed exceeds the preset value, part lubricating oil enters heat dissipation bin through oil throwing flow channel, and when the oil flinger rotation speed is lower than the preset value, the oil throwing flow channel is closed.

[0009] Further, the switch subassembly includes two movable rings coaxially and axially slidingly disposed on the outer periphery of the oil flinger, the two movable rings have tapered surfaces, the small ends of the two movable rings are close to each other, and baffles are fixedly disposed on the small ends of the two movable rings, the two movable rings are configured to move close to each other when the rotation speed of the oil flinger exceeds the preset value, and move away from each other when the rotation speed of the oil flinger is lower than the preset value.

[0010] Further, a plurality of counterweights are slidingly disposed on the two end surfaces of the oil flinger along the radial direction thereof, the plurality of counterweights are uniformly distributed along the circumferential direction of the oil flinger, one end surface of the plurality of counterweights close to the two movable rings is a slope surface, and the slope surface is configured to push the two movable rings to move close to each other when the counterweights move away from the oil flinger along the radial direction, and the baffles on the two movable rings open the oil throwing flow channel.

[0011] A first elastic member is disposed between the two movable rings, and the first elastic member is used to push the two movable rings to move away from each other, and the baffles on the two movable rings block the oil throwing flow channel.

[0012] Further, a through hole is formed in the baffle, and the through hole can communicate with the oil throwing flow channel.

[0013] Further, a plurality of sliding grooves extending along the radial direction are formed in the two end surfaces of the oil flinger, one end of the counterweight is slidingly disposed in the sliding groove, and a second elastic member is disposed between the sliding groove and the part of the counterweight in the sliding groove, and the second elastic member is configured to pull the counterweight to move along the radial direction to the center of the oil flinger.

[0014] Further, a horizontal groove extending along the axial direction is formed in the inner periphery of the two movable rings, and a key extending along the axial direction is fixedly disposed on the outer periphery of the pump shaft, and the key is slidingly disposed in the horizontal groove.

[0015] Further, a stop block is detachably disposed on each of the two end surfaces of the oil flinger.

[0016] Further, the heat dissipation bin comprises a first cooling channel, an upper end of the first cooling channel is communicated with the bearing box and is located on a vertical plane where the oil slinger is located, a middle part of the first cooling channel is a tapered flow channel, a large end of the tapered flow channel faces upward, and a lower end of the first cooling channel is communicated with the bearing box and is located below a lubricating oil liquid level in the bearing box.

[0017] Further, the heat dissipation bin further comprises a plurality of second cooling channels, and the plurality of second cooling channels are respectively communicated with upper and lower ends of the first cooling channel.

[0018] Further, shapes of the plurality of second cooling channels are arc shapes.

[0019] The present application has the following beneficial effects:

[0020] The present application has the following beneficial effects:

[0021] The present application has the following beneficial effects:

[0022] The present application has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1The structural schematic view of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application;

[0024] Figure 2 The structural schematic view of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application; Figure 1 The structural schematic view of the bearing box of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application;

[0025] Figure 3 The structural schematic view of the bearing box of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application; Figure 2 The rear view of the bearing box of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application;

[0026] Figure 4 The structural schematic view of the bearing box of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application; Figure 3 The partial enlarged view of the A part of the bearing box of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application;

[0027] Figure 5 The structural schematic view of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application;

[0028] Figure 6 The structural schematic view of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application; Figure 5 The left view of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application;

[0029] Figure 7 The structural schematic view of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application; Figure 6 The sectional view along X-X of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application;

[0030] Figure 8 The structural schematic view of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application; Figure 7 The partial enlarged view of the B part of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application;

[0031] Figure 9 The structural schematic view of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application; Figure 6 The sectional view along Y-Y of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application;

[0032] Figure 10 The structural schematic view of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application; Figure 9 The partial enlarged view of the C part of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application;

[0033] Figure 11 The structural schematic view of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application; Figure 6 The sectional view along Z-Z of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application;

[0034] Figure 12 The structural schematic view of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application; Figure 11 The partial enlarged view of the D part of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation provided in an embodiment of the present application;

[0035] Figure 13 A top view of another state of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation according to an embodiment; Figure 5 A top view of another state of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation according to an embodiment;

[0036] Figure 14 A top view of another state of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation according to an embodiment; Figure 13 A top view of another state of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation according to an embodiment;

[0037] Figure 15 A top view of another state of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation according to an embodiment; Figure 13 A top view of another state of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation according to an embodiment;

[0038] Figure 16 A top view of another state of the pump shaft and oil throw ring of the corrosion-resistant centrifugal pump for oil transportation according to an embodiment;

[0039] Wherein:

[0040] 100, pump body; 110, pump shaft; 120, bearing box; 130, heat dissipation compartment; 131, first cooling channel; 132, conical flow passage; 133, second cooling channel; 140, driving motor;

[0041] 200, oil throw ring; 210, oil throw flow passage; 211, axial passage; 212, radial passage; 220, movable ring; 221, conical surface; 222, transverse groove; 230, baffle; 231, through hole; 240, sliding groove; 250, counterweight; 251, inclined surface; 260, key; 270, stop block; 280, first elastic member; 290, second elastic member. DETAILED DESCRIPTION

[0042] In order to make the objects, technical solutions and advantages of the present application clearer, further detailed description will be made to the present application by embodiments and in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0043] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] The following reference Figures 1-16 This invention describes a corrosion-resistant centrifugal pump for oil transportation.

[0046] The utility model provides a kind of corrosion-resistant centrifugal pump for oil delivery, it is suitable for the delivery of oil, including pump body 100, oil inlet and oil outlet are provided on pump body 100, and rotatingly arranged with pump shaft 110 in pump body 100, the one end of pump shaft 110 is coaxially and fixedly connected with impeller (not shown in drawing), pump shaft 110 drives impeller to rotate to make oil enter from oil inlet, and output from oil outlet, bearing housing 120 is provided on the other end of pump shaft 110, bearing is fixedly arranged on the both sides of bearing housing 120, pump shaft 110 is coaxially connected with bearing, driving motor 140 is connected after pump shaft 110 passes through bearing, the rotating shaft of driving motor 140 is coaxially connected with pump shaft 110, driving motor 140 can drive pump shaft 110 to rotate around itself, in turn make pump shaft 110 drive impeller to rotate.Lubricating oil is filled in bearing housing 120, lubricating oil is used to lubricate bearing in bearing housing 120, and lubricating oil can play the role of heat dissipation to bearing, in prior art, bearing housing 120 is not filled with lubricating oil, a part of bearing is immersed in lubricating oil, another part of bearing is located above lubricating oil liquid level, by coaxially and fixedly connecting oil throwing ring 200 on pump shaft 110, lubricating oil is thrown to the bearing located above lubricating oil liquid level by the rotation of oil throwing ring 200 driven by pump shaft 110, to play the role of lubricating and heat-dissipating bearing.

[0047] But the rotating speed of pump shaft 110 in prior art can be adjusted according to real-time working state, at this time, the oil liquid of lubricating oil cannot adapt to the rotating speed of centrifugal pump, for example, when the rotating speed of centrifugal pump increases, the same liquid level of lubricating oil will generate greater frictional resistance to oil throwing ring 200, which will cause lubricating oil to heat up faster and higher, and at the same time, will cause the wear degree of oil throwing ring 200 to aggravate.

[0048] Based on this, the heat dissipation bin 130 is arranged on the bearing box 120, the inlet of the heat dissipation bin 130 is communicated with the side wall of the bearing box 120 and is located above the lubricating oil liquid level in the bearing box 120, and the outlet of the heat dissipation bin 130 is communicated with the side wall of the bearing box 120 and is located below the lubricating oil liquid level in the bearing box 120. Meanwhile, the oil throwing flow channel 210 is arranged on the oil throwing ring 200, and the switch assembly is arranged on the oil throwing flow channel 210, the switch assembly is used for controlling the opening and closing of the oil throwing flow channel 210, the switch assembly opens the oil throwing flow channel 210 when the rotating speed of the pump shaft 110 exceeds the preset value (the preset value can be adjusted according to actual requirements, which is not specifically limited here), and the oil throwing flow channel 210 can allow the oil throwing ring 200 to throw part of the lubricating oil to the heat dissipation bin 130, when part of the lubricating oil enters the heat dissipation bin 130, even if the lubricating oil in the heat dissipation bin 130 flows back to the bearing box 120, there is a time difference, so that the amount of lubricating oil in the bearing box 120 is reduced, that is, the lubricating oil liquid level is reduced, thereby reducing the friction of the lubricating oil on the high-speed rotating oil throwing ring 200, so that the speed of the lubricating oil temperature rise can be reduced, and the wear of the lubricating oil on the oil throwing ring 200 can also be reduced; when the rotating speed of the pump shaft 110 is lower than the preset value, the switch assembly blocks the oil throwing flow channel 210, and the oil throwing ring 200 normally throws oil. Because the rotating speed of the pump shaft 110 is low, the liquid level is high, and the wear of the oil throwing ring 200 is lower than that when the rotating speed of the pump shaft 110 is high, at the same time, the temperature rise speed of the lubricating oil is also lower than that when the rotating speed of the pump shaft 110 is high.

[0049] It should be noted that the oil throwing flow channel 210 in the present application is composed of two parts, as shown in Figure 12 The part of the oil throwing flow channel 210 is an axial channel 211 extending along the axis of the oil throwing ring 200, the axial channel 211 is arranged at the position close to the outer periphery of the end face of the oil throwing ring 200 and penetrates through the two end faces of the oil throwing ring 200, and the other part of the oil throwing flow channel 210 is a radial channel 212 extending along the radial direction of the oil throwing ring 200, one end of the radial channel 212 is communicated with the middle position of the axial channel 211, and the other end of the radial channel 212 is located at the outer periphery of the oil throwing ring 200. When the oil throwing flow channel 210 is immersed in the lubricating oil, if the oil throwing flow channel 210 is opened, the lubricating oil will enter the oil throwing flow channel 210, and if the oil throwing flow channel 210 is blocked, the lubricating oil cannot enter the oil throwing flow channel 210.

[0050] Specifically, the switch assembly in the embodiment of the present application includes two movable rings 220 coaxially and axially slidingly arranged at the outer periphery of the oil throwing ring 200, as shown in Figure 7 and Figure 8As shown, both movable rings 220 are provided with conical surfaces 221. The small ends of the two conical surfaces 221 are close to each other, and the large ends are far apart. When the oil slinger ring 200 drives the two movable rings 220 to rotate, the lubricating oil will be thrown towards the bearing through the conical surfaces 221 of the movable rings 220. Furthermore, baffles 230 are fixedly provided on the small ends of the two movable rings 220. Figure 12 and Figure 16 As shown, a through hole 231 is provided on the baffle 230. When the through hole 231 of the baffle 230 is connected to the oil slinger channel 210, the oil slinger channel 210 is opened; when the through hole 231 of the baffle 230 is not connected to the oil slinger channel 210, the oil slinger channel 210 is blocked. In this embodiment, when the rotation speed of the pump shaft 110 is lower than a preset value, the two movable rings 220 move away from each other, and the through hole 231 of the baffle 230 is not connected to the oil slinger channel 210. The oil slinger channel 210 is connected, and the other parts of the baffle 230 block the oil slinger channel 210. When the rotation speed of the pump shaft 110 exceeds the preset value, they can approach each other, thereby driving the through hole 231 on the baffle 230 to connect with the oil slinger channel 210. The oil slinger channel 210 is opened, so that the lubricating oil inside the oil slinger channel 210 is thrown into the heat dissipation chamber 130 under the action of centrifugal force, thereby reducing the liquid level of the lubricating oil in the bearing housing 120.

[0051] In a further embodiment, to ensure that the two movable rings 220 can approach each other when the rotational speed of the pump shaft 110 exceeds a preset value, the present invention provides a plurality of counterweights 250 that are radially slidable on the two end faces of the oil slinger ring 200, such as... Figure 15 As shown, multiple counterweights 250 are evenly distributed along the circumference of the oil slinger ring 200, and inclined surfaces 251 are provided on one end of each counterweight 250 near the two movable rings 220. The inclined surfaces 251 can push the movable rings 220 to move axially along the oil slinger ring 200. A first elastic element 280, which is a compression spring, is provided between the two movable rings 220. The first elastic element 280 can push the two movable rings 220 away from each other. When the rotation speed of the pump shaft 110 exceeds a preset value, the centrifugal force of the oil slinger ring 200 on the counterweights 250 on the pump shaft 110 is relatively large. This allows the counterweight 250 to move radially away from the center of the oil slinger ring 200. The inclined surface 251 on the counterweight 250 can push the two movable rings 220 to overcome the force of the first elastic element 280 and move closer to each other. This causes the baffles 230 on the two movable rings 220 to open and block the oil slinger channel 210. When the rotation speed of the pump shaft 110 is lower than the preset value, the first elastic element 280 between the two movable rings 220 will push the two movable rings 220 away from each other, causing the baffles 230 to block the oil slinger channel 210 again.

[0052] It can be understood that when the rotating speed of the pump shaft 110 is lower than the preset value, the oil throwing force of the oil throwing ring 200 is smaller than that when the rotating speed of the pump shaft 110 exceeds the preset value, and if the distance between the two movable rings 220 on the oil throwing ring 200 remains unchanged, the lubrication effect on the bearing will be poor when the rotating speed of the pump shaft 110 is lower than the preset value, which is due to insufficient oil throwing force. The lubricating oil that can be thrown to the bearing friction surface may not reach the target area due to insufficient kinetic energy, or only a thin and discontinuous oil film is formed on the surface of the bearing, directly leading to poor lubrication effect of the bearing at low speed. Long-term, the bearing is prone to dry friction due to insufficient lubrication, causing temperature rise, noise increase and even component jamming. The distance between the two movable rings 220 on the pump shaft 110 is increased when the rotating speed of the pump shaft 110 is lower than the preset value, which makes the movable ring 220 closer to the bearing. Even if the oil throwing force is weak at low speed, the distance of the lubricating oil thrown is shortened, but because the distance between the movable ring 220 and the bearing is closer, the lubricating oil can still fall on the part of the bearing that needs to be lubricated. In other words, by shortening the delivery distance, the problem of decreased lubricating oil reaching efficiency caused by insufficient oil throwing force is compensated, and the bearing can also be supplied with sufficient and continuous lubricating oil at low speed, so that the lubrication effect is significantly improved, and the risk of lubrication failure at low speed is effectively avoided.

[0053] More specifically, in order to facilitate the sliding connection of the plurality of counterweights 250 and the oil throwing ring 200, a plurality of sliding grooves 240 extending in the radial direction are formed on the two end faces of the oil throwing ring 200, the plurality of sliding grooves 240 are uniformly distributed along the circumference of the oil throwing ring 200, one end of each of the plurality of counterweights 250 is slidingly arranged in the sliding groove 240, and a second elastic member 290 is arranged between the one end of the plurality of counterweights 250 in the sliding groove 240 and the sliding groove 240. The second elastic member 290 is a tension spring, and the second elastic member 290 can pull the counterweight 250 to move away from the two movable rings 220. When the rotating speed of the pump shaft 110 is lower than the preset value, as shown in Figure 14 and Figure 15 , the centrifugal force acting on the plurality of counterweights 250 on the two end faces of the oil throwing ring 200 is smaller than the pulling force of the second elastic member 290 and the pushing force of the first elastic member 280, so that the two movable rings 220 cannot be moved closer to each other to open the oil throwing flow channel 210, and therefore the baffles 230 on the two movable rings 220 block the oil throwing flow channel 210 at this time. When the rotating speed of the pump shaft 110 exceeds the preset value, as shown in Figure 10 and Figure 12As shown, the centrifugal force on the plurality of counterweights 250 on the oil throwing ring 200 is greater than the pulling force of the second elastic member 290 and the pushing force of the first elastic member 280, so that the plurality of counterweights 250 move in a radial direction away from the center of the oil throwing ring 200, at this time, the plurality of counterweights 250 push the two movable blocks close to each other through the inclined surface 251, the through hole 231 on the baffle 230 can be communicated with the oil throwing flow channel 210, and then part of the lubricating oil is thrown into the heat dissipation bin 130.

[0054] It should be noted that, in order to facilitate the sliding of the movable ring 220 along the axial direction of the oil throwing ring 200, as shown, Figure 16 As shown, a plurality of keys 260 extending along the axial direction are arranged on the outer periphery of the oil throwing ring 200, and a plurality of transverse grooves 222 extending along the axial direction are arranged on the inner periphery of the two movable rings 220, the keys 260 are slidingly arranged in the transverse grooves 222, so that the two movable rings 220 can slide along the axial direction of the oil throwing ring 200. At the same time, in order to limit the sliding distance of the two movable rings 220 in the transverse grooves 222 of the oil throwing ring 200, a plurality of stop blocks 270 are detachably arranged on the two end faces of the oil throwing ring 200, the stop blocks 270 are used to limit the axial movement distance of the two movable rings 220, so as to prevent the two movable rings 220 from being separated from the transverse grooves 222. When installing the two movable rings 220, the plurality of stop blocks 270 need to be first detached, then the keys 260 on the inner periphery of the two movable rings 220 are aligned with the transverse grooves 222 on the outer periphery of the oil throwing ring 200, and finally the plurality of stop blocks 270 are fixed on the two ends of the oil throwing ring 200 by screws, thereby facilitating the installation and disassembly of the two movable rings 220.

[0055] It can be understood that the friction between the oil throwing ring 200 and the lubricating oil cannot be avoided when the oil throwing ring 200 rotates, and the main wear part is the outer circular part. Due to long-time friction contact with the lubricating oil, the outer periphery of the oil throwing ring 200 is seriously worn under the friction of metal debris in the lubricating oil, so that a new oil throwing ring 200 needs to be replaced after a long time of use. However, in the prior art, the whole needs to be replaced, and the replacement cost is high. However, the wear of the present application mainly exists in the two movable rings 220 on the outer periphery of the oil throwing ring 200, and the two movable rings 220 are easy to install and disassemble, thereby reducing the replacement cost.

[0056] In further embodiments, as shown in Figure 3 and Figure 4As shown, the heat dissipation bin 130 of the present application comprises a first cooling channel 131, the upper end of the first cooling channel 131 is communicated with the bearing box 120 and is located on the vertical plane where the slinger 200 is located, at the same time, the upper end of the first cooling channel 131 is located above the liquid level of the lubricating oil in the bearing box 120, thereby ensuring that the lubricating oil thrown out from the slinger flow channel 210 enters the first cooling channel 131, the lower end of the first cooling channel 131 is communicated with the bearing box 120 and is located below the liquid level of the lubricating oil in the bearing box 120, a tapered flow channel 132 is arranged at the middle part of the first cooling channel 131, the large end of the tapered flow channel 132 is upward and the small end is downward, the diameter of the large end of the tapered flow channel 132 is equal to the diameter of the upper end of the first cooling channel 131, and the diameter of the small end of the tapered flow channel 132 is smaller than the diameter of the lower end of the first cooling channel 131, so when the lubricating oil flows through the tapered flow channel 132 of the first cooling channel 131, part of the lubricating oil is temporarily retained above the tapered flow channel 132, at this time, the liquid level of the lubricating oil in the bearing box 120 is lowered, thereby reducing the friction force on the slinger 200, and the lubricating oil flowing through the heat dissipation bin 130 is cooled, and the cooled lubricating oil is returned to the bearing box 120, thereby reducing the overall temperature of the lubricating oil.

[0057] Specifically, in order to further improve the heat dissipation effect of the heat dissipation bin 130, the heat dissipation bin 130 further comprises a plurality of second cooling channels 133, as shown in the figure. Figure 4 As shown, the upper and lower ends of the plurality of second cooling channels 133 are respectively communicated with the upper and lower ends of the first cooling channel 131, and are arranged at the upper and lower ends of the tapered flow channel 132, so that the lubricating oil temporarily retained above the tapered flow channel 132 enters below the tapered flow channel 132 through the second cooling channel 133.

[0058] In further embodiments, the plurality of second cooling channels 133 are all arc-shaped, the arc-shaped second cooling channels 133 significantly increase the flow path length of the lubricating oil in the second cooling channels 133, when the lubricating oil flows in the second cooling channels 133, the contact time and contact area of the lubricating oil with the wall surface of the second cooling channels 133 are both expanded, so that the lubricating oil can more fully exchange heat with the heat dissipation bin 130, thereby enhancing the heat dissipation effect; on the other hand, due to the extension of the flow path, the lubricating oil naturally needs more time to flow through the second cooling channels 133, which is equivalent to providing a temporary retention space for the lubricating oil, this temporary retention not only further strengthens the heat dissipation process, but also effectively controls the liquid level height in the heat dissipation bin 130 by adjusting the overall flow rhythm of the lubricating oil, thereby avoiding the problem of reduced heat dissipation efficiency caused by too high liquid level.

[0059] The specific working process of the corrosion-resistant centrifugal pump for oil transportation provided by the present application is described in combination with the above embodiments:

[0060] After the oil inlet and outlet of the pump body 100 are connected to the designated positions of the oil pipeline, the driving motor 140 is started, the driving motor 140 drives the pump shaft 110 to rotate at high speed, the pump shaft 110 drives the impeller to rotate at high speed, thereby conveying the oil, and in the process of rotating the pump shaft 110, the oil throwing ring 200 rotates synchronously, at the same time, the oil throwing ring 200 drives the two movable rings 220 on the outer periphery to rotate synchronously, and the conical surface 221 on the movable ring 220 throws the lubricating oil to the bearing, thereby lubricating and cooling the bearing.

[0061] When the rotating speed of the pump shaft 110 is lower than the preset value, the centrifugal force of the multiple counterweights 250 on the oil throwing ring 200 is not enough to overcome the force of the first elastic member 280 and the second elastic member 290, so the two movable rings 220 on the oil throwing ring 200 are still in a state of moving away from each other, at this time, the through hole 231 on the baffle plate 230 blocks the oil throwing flow channel 210, and when the oil throwing ring 200 rotates, it can only throw the lubricating oil to the bearing, and the distance between the two movable rings 220 and the bearing is relatively close, so the low rotating speed of the pump shaft 110 can also ensure that the lubricating oil can fully lubricate the bearing; when the rotating speed of the pump shaft 110 exceeds the preset value, the centrifugal force of the multiple counterweights 250 on the oil throwing ring 200 can overcome the force of the first elastic member 280 and the second elastic member 290, so that the multiple counterweights 250 move along the radial direction of the oil throwing ring 200 away from the center of the oil throwing ring 200, the inclined surface 251 on the multiple counterweights 250 pushes the two movable rings 220 to move close to each other, the baffle plates 230 on the two movable rings 220 move close to each other, thereby enabling the through hole 231 on the baffle plate 230 to be in communication with the oil throwing flow channel 210, and the oil throwing ring 200 can throw part of the lubricating oil from the oil throwing flow channel 210 into the first cooling channel 131 of the heat dissipation bin 130, the lubricating oil flows through the first cooling channel 131 and the multiple second cooling channels 133 to dissipate heat, and at the same time, the lubricating oil stays for a short time, thereby reducing the liquid level of the lubricating oil in the bearing box 120, and reducing the wear of the two movable rings 220 in the high-speed rotating state.

[0062] Replace the movable ring 220:

[0063] When the two movable rings 220 on the outer periphery of the oil throwing ring 200 are severely worn with the increase of working time, stop the rotation of the driving motor 140, disassemble the bearing box 120, and remove the stop block 270 on both ends of the oil throwing ring 200, so as to take out the two movable rings 220, after replacing the new movable ring 220, reinstall the stop block 270 on both ends of the oil throwing ring 200, and finally close the bearing box 120, thereby completing the replacement work.

[0064] Any combination of the technical features in the above embodiments can be made, and for the sake of brevity, not all possible combinations are described above. However, any combination of the technical features is deemed to be within the scope of the present disclosure as long as such a combination does not result in an inconsistency.

[0065] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but should not be understood as a limitation on the scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A kind of corrosion-resistant centrifugal pump for oil transportation, including pump body, bearing box and oil thrower, the pump body is opened with oil inlet and oil outlet, the pump shaft is rotatably arranged in the pump body, the impeller is coaxially and fixedly arranged on one end of the pump shaft, the bearing is arranged in the bearing box, the bearing is coaxially connected with the other end of the pump shaft, the drive motor is arranged on one side of the bearing box, the rotating shaft of the drive motor is connected with the pump shaft, the oil thrower is coaxially and fixedly arranged on the pump shaft, characterized in that, The bearing box side wall is provided with a heat dissipation bin, the inlet of the heat dissipation bin is located above the lubricating oil liquid level in the bearing box, the outlet of the heat dissipation bin is located below the lubricating oil liquid level, the oil throwing ring is provided with an oil throwing flow channel, the oil throwing flow channel is provided with an opening and closing assembly, the opening and closing assembly is configured to open the oil throwing flow channel when the rotation speed of the oil throwing ring exceeds a preset value, part of the lubricating oil enters the heat dissipation bin through the oil throwing flow channel, and the oil throwing flow channel is closed when the rotation speed of the oil throwing ring is lower than the preset value.

2. The corrosion resistant centrifugal pump for petroleum transportation according to claim 1, characterized by The opening and closing assembly includes two movable rings coaxially and axially slidingly arranged on the outer periphery of the oil throwing ring, the two movable rings have tapered surfaces, the small ends of the two movable rings are close to each other, and baffles are fixedly arranged on the small ends of the two movable rings, the two movable rings are configured to move close to each other when the rotation speed of the oil throwing ring exceeds the preset value, and the two movable rings are configured to move away from each other when the rotation speed of the oil throwing ring is lower than the preset value.

3. The corrosion resistant centrifugal pump for petroleum transportation according to claim 2, characterized by A plurality of counterweights are slidingly arranged on the two end surfaces of the oil throwing ring along the radial direction thereof, the plurality of counterweights are uniformly distributed along the circumferential direction of the oil throwing ring, one end surface of the plurality of counterweights close to the two movable rings is a slope, and the slope is configured to push the two movable rings to move close to each other when the counterweights move away from the oil throwing ring along the radial direction. A first elastic member is arranged between the two movable rings, and the first elastic member is used to push the two movable rings to move away from each other, and the baffles on the two movable rings block the oil throwing flow channel.

4. The corrosion resistant centrifugal pump for petroleum transportation according to claim 3, characterized by A through hole is formed in the baffle, and the through hole can communicate with the oil throwing flow channel.

5. The corrosion resistant centrifugal pump for petroleum transportation according to claim 3, characterized by A plurality of sliding grooves extending along the radial direction are formed in the two end surfaces of the oil throwing ring, one end of the counterweight is slidingly arranged in the sliding groove, a second elastic member is arranged between the sliding groove and the part of the counterweight in the sliding groove, and the second elastic member is configured to pull the counterweight to move along the radial direction to the center of the oil throwing ring.

6. The corrosion resistant centrifugal pump for petroleum transportation according to claim 2, characterized by A horizontal groove extending along the axial direction is formed in the inner periphery of the two movable rings, and a key extending along the axial direction is fixedly arranged on the outer periphery of the pump shaft, and the key is slidingly arranged in the horizontal groove.

7. The corrosion resistant centrifugal pump for petroleum transportation according to claim 2, characterized by A stop block is detachably arranged on each of the two end surfaces of the oil throwing ring.

8. The corrosion resistant centrifugal pump for petroleum transportation according to claim 1, characterized by The heat dissipation bin includes a first cooling channel, the upper end of the first cooling channel communicates with the bearing box and is located on the vertical plane where the oil throwing ring is located, the middle part of the first cooling channel is a tapered flow channel, the large end of the tapered flow channel faces upward, and the lower end of the first cooling channel communicates with the bearing box and is located below the lubricating oil liquid level in the bearing box.

9. The corrosion resistant centrifugal pump for oil transfer as claimed in claim 8 wherein, The heat dissipation bin further includes a plurality of second cooling channels, and the plurality of second cooling channels respectively communicate with the upper and lower ends of the first cooling channel.

10. The corrosion resistant centrifugal pump for oil transfer as claimed in claim 9 wherein, The plurality of second cooling channels are arc-shaped. The plurality of second cooling channels are arc-shaped.

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