Horizontal centrifugal pump

Abstract

The application relates to the technical field of centrifugal pump cooling, and particularly provides a horizontal centrifugal pump, which comprises a pump body, a pump shaft is rotationally arranged in the pump body, the other end of the pump shaft is located in a bearing box, the bearing box is filled with lubricating oil, a pair of oil flinger rings are arranged on the pump shaft, oil injection pipes are arranged on the outer periphery of the oil flinger rings, the oil injection pipes have oil injection cavities and filter cavities, metal scraps in the lubricating oil are concentrated in the filter cavities by centrifugal force, only low-impurity lubricating oil is reserved in the oil injection cavities, when the oil injection pipes rotate to the corresponding positions, the low-impurity lubricating oil is directly injected to bearings, metal scraps are prevented from re-entering the bearings, and bearing abrasion is reduced; compared with a traditional passive filtering mode in which a filtering device is directly arranged in the bearing box, the application first concentrates impurities in the filter cavities through the oil injection pipes, and then carries out targeted filtering through the filter screen of the filter channel, so that the filtering efficiency of metal scraps in the lubricating oil is greatly improved, and the lubricating system is ensured to be clean for a long time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of centrifugal pump cooling, in particular to a horizontal centrifugal pump. BACKGROUND

[0002] The centrifugal pump is a kind of fluid machinery for transporting liquid by centrifugal force generated by impeller rotation, and is widely used in industrial, agricultural, municipal engineering and other fields due to its simple structure, high efficiency and stable flow.

[0003] The centrifugal pump includes a pump body, a motor and a bearing box, the pump shaft is coaxially connected to the bearing box through the bearing in the bearing box, the rotating shaft of the motor is connected to one end of the pump shaft in the bearing box, the other end of the pump shaft is located in the pump body and is provided with an impeller at the end, and the bearing box is filled with lubricating oil, which can lubricate and cool the pump shaft and the bearing.

[0004] However, the lubricating oil in the above-mentioned scheme will mix with metal debris formed by mechanical wear, and the metal debris in the lubricating oil will re-enter the bearing during the flow of the lubricating oil, which will aggravate the wear of the bearing, thereby reducing the service life of the bearing and affecting the overall service life of the centrifugal pump. SUMMARY

[0005] Therefore, it is necessary to provide a horizontal centrifugal pump to solve the problem that the current lubricating oil aggravates the wear of the bearing.

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

[0007] A horizontal centrifugal pump, comprising:

[0008] A pump body is provided with an inlet and an outlet, a pump shaft is rotatably arranged inside the pump body, and an impeller is coaxially and fixedly arranged on one end of the pump shaft;

[0009] A bearing box is located in the pump body, the bearing box is filled with lubricating oil, two bearings are connected to the corresponding two side walls of the bearing box, the inner rings of the two bearings are coaxially and fixedly connected to the other end of the pump shaft, and a pair of oil throwing rings are arranged on the pump shaft in the bearing box;

[0010] A filter channel is located above the oil throwing ring, and a filter screen is arranged in the filter channel.

[0011] An oil injection pipe is arranged on the oil slinger, and extends radially along the oil slinger. The oil injection pipe is internally provided with an oil injection cavity and a filter cavity in sequence from the radial direction close to the center of the oil slinger to the radial direction away from the center of the oil slinger.

[0012] The oil injection pipe is configured to spray lubricating oil from the oil injection cavity to the bearing when the oil injection pipe is extended from the lubricating oil, and spray lubricating oil from the filter cavity to the opening of the filter passage when the filter cavity is close to the filter passage.

[0013] Further, a cooling cavity is arranged between the oil injection cavity and the filter cavity of the oil injection pipe, and a cooling passage is arranged below the filter passage. The oil injection pipe is configured to spray lubricating oil from the cooling cavity to the opening of the cooling passage when the cooling cavity is close to the cooling passage.

[0014] Further, a switch assembly is arranged on the oil injection pipe, and the switch assembly is capable of controlling the opening and closing of the cooling cavity and the filter cavity. The switch assembly is configured to open the filter cavity and the cooling cavity when the oil injection pipe is extended into the lubricating oil, open the filter cavity when the oil injection pipe is close to the filter passage, and open the cooling cavity when the oil injection pipe is close to the cooling passage.

[0015] Further, the switch assembly comprises a first rotating plate, a second rotating plate, a third rotating plate, and a driving disc. The first rotating plate is rotationally arranged between the oil injection cavity and the cooling cavity. The second rotating plate is rotationally arranged between the cooling cavity and the filter cavity. The third rotating plate is rotationally arranged at one end of the filter cavity away from the cooling cavity. The driving disc is fixedly arranged in the bearing box, and an end surface of the driving disc is used to drive the first rotating plate, the second rotating plate, and the third rotating plate to rotate.

[0016] Further, a first sleeve is helically connected to one end of the first rotating plate. A second sleeve is helically connected to one end of the second rotating plate. A third sleeve is helically connected to one end of the third rotating plate. A first protruding ring, a second protruding ring, and a third protruding ring are arranged in the radial direction from the center to the periphery of the end surface of the driving disc close to the oil injection pipe in sequence. The first protruding ring is in sliding contact with the first sleeve. The second protruding ring is in sliding contact with the second sleeve. The third protruding ring is in sliding contact with the third sleeve.

[0017] Further, the first sleeve is connected to the second sleeve, and the second sleeve is connected to the third sleeve. The axes of the first sleeve, the second sleeve, and the third sleeve are parallel to each other, and the three sleeves are allowed to move axially.

[0018] Further, the first sleeve, the second sleeve, and the third sleeve are each provided with a sliding groove extending in the axial direction. A first limiting rod is slidingly arranged in the sliding groove between the first sleeve and the second sleeve. A second limiting rod is slidingly arranged in the sliding groove between the second sleeve and the third sleeve.

[0019] Furthermore, the volume of the cooling chamber is positively correlated with the temperature of the lubricating oil.

[0020] Furthermore, the sidewall of the oil injection pipe is a bellows, and a telescopic cylinder is provided on the outer periphery of the bellows. The two ends of the telescopic cylinder are respectively connected to the two ends of the bellows, and the length of the telescopic cylinder is positively correlated with the temperature of the lubricating oil.

[0021] Furthermore, both ends of the corrugated pipe are straight pipe sections.

[0022] The beneficial effects of this invention are:

[0023] This invention utilizes an oil spray pipe with an oil injection chamber and a filter chamber on an oil slinger ring. Centrifugal force is used to concentrate metal debris in the lubricating oil into the filter chamber, while the oil injection chamber retains only low-impurity lubricating oil. When the oil spray pipe rotates to the corresponding position, the low-impurity lubricating oil is sprayed directly onto the bearing, preventing metal debris from re-entering the bearing and reducing bearing wear. This solves the problem of lubricating oil carrying impurities circulating and aggravating wear in the prior art. At the same time, compared with the traditional passive filtration method of directly installing a filter device in the bearing housing, this invention first concentrates impurities into the filter chamber through the oil spray pipe, and then filters them specifically through the filter screen of the filter channel, which greatly improves the filtration efficiency of metal debris in the lubricating oil and ensures the long-term cleanliness of the lubrication system.

[0024] This invention adds a cooling chamber inside the fuel injection pipe, along with a cooling channel and cooling components. When the fuel injection pipe rotates to the corresponding position, the lubricating oil in the cooling chamber can enter the cooling channel to cool down, and then flow back to the bearing housing. This design can continuously reduce the overall temperature of the lubricating oil in the bearing housing, avoiding a decrease in lubrication performance due to overheating of the lubricating oil.

[0025] This invention utilizes an oil injection pipe mounted on the sidewall of a bellows, with a telescopic cylinder on its outer periphery that adjusts its length according to temperature changes. This creates a positive correlation between the cooling chamber volume and the lubricating oil temperature. As the temperature rises, the telescopic cylinder extends, increasing the cooling chamber volume and the amount of lubricating oil cooled in a single cycle, thus improving cooling efficiency. Conversely, as the temperature decreases, the cooling chamber volume decreases, and the cooling efficiency adaptively declines. This design achieves intelligent adjustment of the cooling rate without requiring additional power, adapting to temperature variations under different loads (such as high speeds and long-term operation). Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a horizontal centrifugal pump provided in an embodiment of the present invention;

[0027] Figure 2 for Figure 1 A right view of a horizontal centrifugal pump provided in one embodiment;

[0028] Figure 3 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided. Figure 1 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided.

[0029] Figure 4 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided. Figure 3 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided.

[0030] Figure 5 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided. Figure 3 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided.

[0031] Figure 6 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided. Figure 3 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided.

[0032] Figure 7 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided.

[0033] Figure 8 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided. Figure 7 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided.

[0034] Figure 9 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided.

[0035] Figure 10 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided. Figure 9 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided.

[0036] Figure 11 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided. Figure 10 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided.

[0037] Figure 12 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided. Figure 11 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided.

[0038] Figure 13 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided.

[0039] Figure 14 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided.

[0040] Figure 15 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided. Figure 14 A top view of a horizontal centrifugal pump according to an embodiment of the present application is provided.

[0041] wherein:

[0042] 100, pump body; 101, inlet; 102, outlet; 110, driving motor; 120, coupling; 130, pump shaft; 140, impeller;

[0043] 200, bearing box; 210, oil slinger; 220, oil injection pipe; 230, oil injection cavity; 231, oil injection port; 232, baffle; 233, arc-shaped groove; 234, through hole; 240, filtering cavity; 241, filtering channel; 250, cooling cavity; 251, cooling channel; 260, bellows; 270, telescopic cylinder; 280, oil inlet screen pipe;

[0044] 300, first rotating plate; 310, first sleeve; 320, second rotating plate; 330, second sleeve; 340, third rotating plate; 350, third sleeve; 360, first limiting rod; 370, second limiting rod; 380, sliding groove; 390, spring;

[0045] 400, driving disc; 410, first convex ring; 420, second convex ring; 430, third convex ring. DETAILED DESCRIPTION

[0046] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the 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 should not be used to limit the present application.

[0047] The serial numbers of components in the present application, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "coupling" in the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientations or positional relationships shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0048] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or just means that the first feature is higher than the second feature in horizontal height. The first feature is "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or just means that the first feature is lower than the second feature in horizontal height.

[0049] The present application provides a horizontal centrifugal pump. Figures 1-15 The present application provides a horizontal centrifugal pump.

[0050] A horizontal centrifugal pump comprises a pump body 100, an inlet 101 and an outlet 102 are formed on the pump body 100, a pump shaft 130 is rotatably arranged in the pump body 100, an impeller 140 is coaxially and fixedly arranged on one end of the pump shaft 130, the pump shaft 130 drives the impeller 140 to rotate so that the liquid can enter from the inlet 101 and be discharged from the outlet 102, a bearing box 200 is further arranged in the pump body 100, the bearing box 200 is filled with lubricating oil, the liquid level of the lubricating oil in the bearing box 200 is between one-half of the height of the bearing box 200 and two-thirds of the height of the bearing box 200, and two bearings are connected to the corresponding two side walls of the bearing box 200, one half of the two bearings is immersed in the lubricating oil, and the other half of the two bearings is above the liquid level of the lubricating oil, the axes of the two bearings coincide, and the inner rings of the two bearings are coaxial and fixedly connected to the other end of the pump shaft 130, a driving motor 110 is arranged outside the pump body 100, the rotating shaft of the driving motor 110 is connected to the pump shaft 130 through a shaft coupling 120, and the driving motor 110 drives the pump shaft 130 to rotate, in order to improve the lubricating effect of the lubricating oil on the bearings, a pair of oil throwing rings 210 are coaxially and fixedly arranged on the pump shaft 130 in the bearing box 200 in the prior art, the two oil throwing rings 210 are respectively close to the two bearings, and when the pump shaft 130 rotates, the two oil throwing rings 210 are driven to rotate synchronously so as to throw the lubricating oil in the bearing box 200 to the two bearings, thereby lubricating the bearings located above the liquid level of the lubricating oil, and the lubricating effect of the bearings is improved.

[0051] However, metal debris will be generated in the bearing box 200 due to mechanical wear in the prior art, and the metal debris inside will re-enter the bearings during the flow of the lubricating oil, which will aggravate the wear of the bearings, thereby reducing the service life of the bearings and affecting the overall service life of the centrifugal pump.

[0052] Based on this, the application is provided with a plurality of oil injection pipes 220 on the two oil flingers 210, the plurality of oil injection pipes 220 are evenly distributed along the circumference of the oil flinger 210, the plurality of oil injection pipes 220 extend along the radial direction of the oil flinger 210, and the plurality of oil injection pipes 220 are provided with an oil injection cavity 230 and a filtering cavity 240, the oil injection cavity 230 is close to the center of the oil flinger 210, the filtering cavity 240 is close to the outer periphery of the oil flinger 210, when the pump shaft 130 drives the oil flinger 210 to rotate, the oil flinger 210 drives the plurality of oil injection pipes 220 to constantly immerse in and extend out of the lubricating oil, when the oil injection pipe 220 immerses in the lubricating oil, the filtering cavity 240 and the oil injection cavity 230 of the oil injection pipe 220 are communicated, and the lubricating oil enters into the oil injection pipe 220 from the opening of the filtering cavity 240, then the opening of the filtering cavity 240 is closed, at this time, the oil injection pipe 220 is subjected to the centrifugal force in rotation, the metal debris in the internal lubricating oil moves towards the filtering cavity 240 under the action of the centrifugal force, when the oil injection pipe 220 is about to extend out of the lubricating oil liquid surface, the oil injection cavity 230 and the filtering cavity 240 of the oil injection pipe 220 are no longer communicated, but are independent of each other, when the oil injection pipe 220 extends out of the lubricating oil liquid surface, the oil injection cavity 230 is opened, so as to throw the lubricating oil to the bearing, at this time, the filtering cavity 240 is in a blocking state, in order to enable the lubricating oil in the filtering cavity 240 to be filtered, the filtering passage 241 is arranged in the bearing box 200, the filtering net is arranged in the filtering passage 241, the filtering net is detachably arranged, can be cleaned or replaced in time, the filtering net is used for filtering the metal debris in the lubricating oil, and the filtering passage 241 is located above the oil flinger 210, when the filtering cavity 240 of the oil injection pipe 220 is close to the filtering passage 241, the opening is opened, the lubricating oil in the internal filtering cavity 240 enters into the filtering passage 241 to be filtered, so as to realize the function of shunting the lubricating oil, so that there is almost no metal debris in the oil injection cavity 230, the lubricating oil will be directly sprayed on the bearing to be lubricated, so as to reduce the wear of the bearing caused by the metal debris; the content of the metal debris in the lubricating oil in the filtering cavity 240 is increased, the lubricating oil will enter into the filtering passage 241 to be filtered, compared with directly arranging the filtering device in the bearing box 200, the application concentrates the metal debris in the lubricating oil in the filtering cavity 240, and then the metal debris in the filtering cavity 240 enters into the filtering passage 241 to be filtered, so that the filtering efficiency of the metal debris in the lubricating oil is greatly improved.

[0053] Specifically, in the embodiment of the present application, the cooling cavity 250 is arranged between the oil injection cavity 230 and the filtering cavity 240 of the oil injection pipe 220, and is used for cooling the lubricating oil. The cooling channel 251 is arranged below the filtering channel 241, and the outer periphery of the cooling channel 251 is provided with a cooling assembly (not shown in the figure). The cooling assembly is a prior art, and will not be described in detail here. The opening of the cooling channel 251 is a certain distance away from the opening of the filtering channel 241, and is located on the front side of the rotation direction of the oil injection pipe 220, that is, when the oil injection pipe 220 is extended out of the lubricating oil surface and continues to rotate, it will first pass through the opening of the filtering channel 241, and then pass through the opening of the cooling channel 251.

[0054] It should be noted that when the oil injection pipe 220 is inserted into the lubricating oil surface and close to the opening of the filtering channel 241, the filtering cavity 240 is first opened, and at this time the cooling cavity 250 is closed. When the oil injection pipe 220 is close to the opening of the cooling channel 251, the cooling cavity 250 is opened. The lubricating oil in the cooling cavity 250 will pass through the filtering cavity 240 and enter the opening of the cooling channel 251, so as to be cooled by the cooling assembly of the cooling channel 251. Finally, the lubricating oil reenters the bearing box 200 to circulate and cool the lubricating oil.

[0055] Specifically, the oil injection pipe 220 of the present application is provided with a switch assembly, which can control the opening and closing of the cooling cavity 250 and the filtering cavity 240. When the oil injection pipe 220 is inserted into the lubricating oil, the switch assembly opens the filtering cavity 240 and the cooling cavity 250, so that the lubricating oil can enter and fill the filtering cavity 240, the cooling cavity 250 and the oil injection cavity 230. When the oil injection pipe 220 is about to be extended out of the lubricating oil surface, the switch assembly blocks the filtering cavity 240 and the cooling cavity 250 in the oil injection pipe 220. At this time, only the oil injection cavity 230 is gradually opened, so that the impurities in the lubricating oil in the oil injection pipe 220 are locked in the filtering cavity 240, preventing the lubricating oil with more impurities in the filtering cavity 240 from entering the cooling cavity 250. When the end of the oil injection pipe 220, that is, the filtering cavity 240 is close to the filtering channel 241, the switch assembly opens the filtering cavity 240. The lubricating oil with more metal debris in the filtering cavity 240 is filtered through the filtering channel 241 and then reflows into the bearing box 200. With the rotation of the oil injection pipe 220 driven by the oil throwing ring 210, the filtering cavity 240 of the oil injection pipe 220 is close to the cooling channel 251. At this time, the switch assembly opens the cooling cavity 250, so that the lubricating oil in the cooling cavity 250 is discharged into the cooling channel 251 through the filtering cavity 240. The lubricating oil is cooled in the cooling channel 251 and then reflows into the bearing box 200, thereby reducing the overall temperature of the lubricating oil in the bearing box 200.

[0056] It can be understood that the temperature of the lubricating oil in the cooling cavity 250 in the oil injection pipe 220 is reduced after being cooled by the cooling channel 251 each time, and the overall temperature is reduced when the lubricating oil at a low temperature mixes with the lubricating oil at a high temperature in the bearing box 200, thereby achieving the effect of cooling.

[0057] Specifically, the switch assembly in the embodiment includes a first rotating plate 300, a second rotating plate 320, a third rotating plate 340, and a driving disc 400. The first rotating plate 300 is rotationally arranged between the oil injection cavity 230 and the cooling cavity 250, and the first rotating plate 300 can open or close the communication between the oil injection cavity 230 and the cooling cavity 250 when rotating. The second rotating plate 320 is rotationally arranged between the cooling cavity 250 and the filtering cavity 240, and the second rotating plate 320 can open or close the communication between the cooling cavity 250 and the filtering cavity 240 when rotating. The third rotating plate 340 is rotationally arranged at one end of the filtering cavity 240 away from the cooling cavity 250, and the third rotating plate 340 can open or close the one end of the filtering cavity 240 away from the cooling cavity 250 when rotating. To rotate the first rotating plate 300, the second rotating plate 320, or the third rotating plate 340 after the oil injection pipe 220 is rotated to different positions, a first sleeve 310, a second sleeve 330, and a third sleeve 350 are coaxially and spirally connected to one end of the first rotating plate 300, the second rotating plate 320, and the third rotating plate 340. Two driving discs 400 are arranged in the bearing box 200, and the two driving discs 400 are arranged close to the end faces of the two oil flinger rings 210. The end face of the driving disc 400 is sequentially provided with a first convex ring 410, a second convex ring 420, and a third convex ring 430 from the center to the periphery.

[0058] As Figure 7 and Figure 8As shown, the first convex ring 410 and the first sleeve 310 rotate in the same position, the first convex ring 410 is in sliding contact with one end of the first sleeve 310, the second convex ring 420 and the second sleeve 330 rotate in the same position, the second convex ring 420 is in sliding contact with one end of the second sleeve 330, the third convex ring 430 and the third sleeve 350 rotate in the same position, the third convex ring 430 is in sliding contact with one end of the third sleeve 350, because the thickness of the first convex ring 410 is different at different positions, when the first sleeve 310 slides to the position with thicker thickness when the oil injection pipe 220 rotates, the first convex ring 410 will push the first sleeve 310 to move along its axial direction, similarly, the axial movement of the second sleeve 330 and the third sleeve 350 is also based on the above principle, which will not be described in detail here. In this embodiment, in order to prevent the first sleeve 310 from rotating around its axis, the first sleeve 310 is connected with the second sleeve 330, and the second sleeve 330 and the third sleeve 350 are connected, because the first sleeve 310 cannot rotate around its axis, and the first sleeve 310 is screw-connected with one end of the first rotating plate 300, when the first sleeve 310 moves along its axial direction, the first rotating plate 300 can be rotated, similarly, the second rotating plate 320 and the third rotating plate 340 are also rotated according to the above method.

[0059] It should be noted that in this embodiment, the end of the first sleeve 310 screw-connected with the first rotating plate 300 is provided with a spring 390, after the spring 390 is compressed, it will have a restoring tendency, when the first sleeve 310 is not pushed by the first convex ring 410, the spring 390 will restore to its original length, thereby driving the first rotating plate 300 to restore, similarly, the second sleeve 330 and the third sleeve 350 are also provided with springs 390, which have the same function as above, which will not be described in detail here.

[0060] It should be further noted that the second rotating plate 320 and the third rotating plate 340 in this embodiment are in the position of opening the cooling cavity 250 and the filtering cavity 240 when they are pushed by the second convex ring 420 and the third convex ring 430, as shown in FIG. 2, when the second rotating plate 320 and the third rotating plate 340 are pushed by the second convex ring 420 and the third convex ring 430, the second rotating plate 320 and the third rotating plate 340 will be in the position of opening the cooling cavity 250 and the filtering cavity 240, and when the second rotating plate 320 and the third rotating plate 340 are not pushed by the second convex ring 420 and the third convex ring 430, the second rotating plate 320 and the third rotating plate 340 will be in the position of closing the cooling cavity 250 and the filtering cavity 240, which will not be described in detail here. Figure 11As shown, the axes of the second rotating plate 320 and the third rotating plate 340 are parallel to each other, and the axis of the first rotating plate 300 is perpendicular to the axes of the first rotating plate 300 and the second rotating plate 320 when the first rotating plate 300 is in the position of blocking the communication between the oil injection cavity 230 and the cooling cavity 250 without the pushing action of the first convex ring 410. When the first sleeve 310 is in sliding contact with the thicker portion of the first convex ring 410, the first sleeve 310 is pushed to move axially to make the first rotating plate 300 rotate 90° to open the communication between the oil injection cavity 230 and the cooling cavity 250. When the second sleeve 330 is in sliding contact with the thinner portion of the second convex ring 420, the second sleeve 330 is no longer pushed by the second convex ring 420 and moves axially under the resetting action of the spring 390 to make the second rotating plate 320 rotate 90° to close the communication between the cooling cavity 250 and the filtering cavity 240. When the third sleeve 350 is in sliding contact with the thinner portion of the third convex ring 430, the third sleeve 350 is no longer pushed by the third convex ring 430 and moves axially under the resetting action of the spring 390 to make the second rotating plate 320 rotate 90° to close the filtering cavity 240 away from the cooling cavity 250.

[0061] The thicker portion and the thinner portion of the first convex ring 410, the second convex ring 420 and the third convex ring 430 in the embodiment are smoothly connected by bevels. Since the lubricating oil liquid level in the bearing box 200 is between one-half and two-thirds, the position height of the diameter of the driving disc 400 in the horizontal state is one-half of the height of the bearing box 200, the oil injection pipe 220 is inclined upward and the included angle between the oil injection pipe 220 and the horizontal is 60°, the position of the oil injection cavity 230 of the oil injection pipe 220 is just above the lubricating oil liquid level, at this time, the first rotating plate 300 between the oil injection cavity 230 and the cooling cavity 250 is open, and the oil injection pipe 220 rotates clockwise (clockwise means clockwise rotation in the following description) to make the first rotating plate 300 rotate 90° to close the communication between the oil injection cavity 230 and the cooling cavity 250. Figure 8When the spray pipe 220 rotates from the 60° angle to the 30° angle in the clockwise direction as shown in the figure, the filtering cavity 240 on the spray pipe 220 is just in contact with the lubricating oil liquid surface away from the one end of the cooling cavity 250, at this time, the third rotating plate 340 is in the open state, the second rotating plate 320 and the first rotating plate 300 inside the spray pipe 220 are both in the open state so that the lubricating oil enters the filtering cavity 240, the cooling cavity 250 and the spray cavity 230, when the spray pipe 220 rotates from the 30° angle to the 0° angle in the clockwise direction, at this time, the third rotating plate 340 of the filtering cavity 240 on the spray pipe 220 away from the one end of the cooling cavity 250 is closed so as to prevent the lubricating oil inside the spray pipe 220 from being discharged, while the first rotating plate 300 and the second rotating plate 320 are still in the open state, the spray pipe 220 continues to rotate in the clockwise direction, the metal debris in the lubricating oil moves towards the filtering cavity 240 under the action of the centrifugal force, the content of the metal debris in the lubricating oil inside the spray cavity 230 and the cooling cavity 250 is greatly reduced, when the spray pipe 220 rotates to the 150° angle in the clockwise direction, the first rotating plate 300 and the second rotating plate 320 need to be closed, at this time, the spray cavity 230 of the spray pipe 220 is just above the lubricating oil liquid surface, in order to facilitate the discharge of the lubricating oil inside the spray cavity 230, the spray port 231 is arranged on the side wall of the spray cavity 230, the spray port 231 faces the direction of the bearing, when the spray cavity 230 is above the lubricating oil liquid surface, the lubricating oil inside the spray cavity 230 is sprayed to the bearing through the spray port 231, with the continuous clockwise rotation of the spray pipe 220, when the spray pipe 220 rotates to the 120° angle, the spray cavity 230 of the spray pipe 220 is close to the filtering passage 241 away from the one end of the cooling cavity 250, so at this time, the third sleeve 350 on the spray pipe 220 is pushed by the third protruding ring 430 to drive the third rotating plate 340 to rotate 90° so as to open the filtering cavity 240, the lubricating oil inside the filtering cavity 240 enters the filtering passage 241, when the spray pipe 220 continues to rotate in the clockwise direction to the 90° angle, the filtering cavity 240 is close to the opening of the cooling passage 251, at this time, the second protruding ring 420 pushes the second sleeve 330 to drive the second rotating plate 320 to rotate 90° so as to open the cooling cavity 250, the lubricating oil in the cooling cavity 250 enters the cooling passage 251 through the filtering cavity 240. The spray pipe 220 continues to rotate in the clockwise direction, when the spray pipe 220 rotates to the 60° angle again, the above process is repeated, which will not be described in detail here.

[0062] As Figure 14 and Figure 15As shown, to realize the above functions, in the embodiment, the first convex ring 410 is divided into thick and thin parts by the first rotating plate 300, the first sleeve 310 rotates 90° when it contacts the thick part to open the communication between the oil injection cavity 230 and the cooling cavity 250, and the first rotating plate 300 blocks the oil injection cavity 230 when the first sleeve 310 contacts the thin part of the first convex ring 410; the second sleeve 330 slides on the thick part of the second convex ring 420 to keep the cooling cavity 250 and the filter cavity 240 in communication, and the second sleeve 330 blocks the communication between the cooling cavity 250 and the filter cavity 240 when it slides on the thin part of the second convex ring 420; the third sleeve 350 is in the state of closing the filter cavity 240 when it slides on the thin part of the third convex ring 430, and the third sleeve 350 is in the state of opening the filter cavity 240 when it slides on the thick part of the third convex ring 430.

[0063] It should be further noted that, in the embodiment, to avoid the relative rotation of the first sleeve 310, the second sleeve 330 and the third sleeve 350, the first limiting rod 360 is arranged between the outer periphery of the first sleeve 310 and the outer periphery of the second sleeve 330, the second limiting rod 370 is arranged between the outer periphery of the second sleeve 330 and the outer periphery of the third sleeve 350, and the sliding grooves 380 extending along the axial direction are arranged on the outer periphery of the first sleeve 310, the second sleeve 330 and the third sleeve 350, and the two ends of the first limiting rod 360 and the second limiting rod 370 are respectively arranged in the sliding grooves 380, so as to avoid the mutual influence of the first sleeve 310, the second sleeve 330 and the third sleeve 350 when they move, for example, the axial movement of the first sleeve 310 does not drive the second sleeve 330 to move, the axial movement of the second sleeve 330 does not drive the third sleeve 350 and the first sleeve 310 to move, and the axial movement of the third sleeve 350 does not drive the second sleeve 330 and the first sleeve 310 to move.

[0064] To facilitate the oil injection pipe 220 to start oil injection when it is rotated to an angle of 150° with the horizontal plane, the embodiment is provided with a structure for controlling the opening and closing of the oil injection port 231, specifically, a baffle 232 is fixedly arranged in the bearing box 200, and the oil injection pipe 220 is provided with a protrusion 221, the protrusion 221 is arranged to be in contact with the baffle 232 when the oil injection pipe 220 is rotated to an angle of 150° with the horizontal plane, and the baffle 232 is arranged to be in contact with the protrusion 221 when the oil injection pipe 220 is rotated to an angle of 150° with the horizontal plane. Figure 5 and Figure 7As shown, two connecting plates are fixedly arranged on the outer periphery of the baffle 232, the other ends of the two connecting plates are fixedly connected to the inside of the bearing box 200, so as to fix the baffle 232 in the bearing box 200, the baffle 232 is coaxial with and rotationally connected to the pump shaft 130, so that the pump shaft 130 can rotate relative to the baffle 232, the baffle 232 is provided with an arc-shaped groove 233, the arc-shaped groove 233 is located just above the lubricating oil surface, and when the oil injection cavity 230 is rotated to the lubricating oil surface, the oil injection port 231 of the oil injection cavity 230 coincides with the arc-shaped groove 233, so that the oil injection port 231 is opened, and the internal lubricating oil is easily thrown out under the action of centrifugal force; when the oil injection cavity 230 is rotated below the lubricating oil surface, the oil injection port 231 of the oil injection cavity 230 is separated from the arc-shaped groove 233, so as to be blocked, so as to prevent the internal lubricating oil from being sprayed out.

[0065] Specifically, in order to facilitate the lubricating oil to be better sprayed out of the oil injection cavity 230, a through hole 234 is formed on the other side of the oil injection cavity 230, the through hole 234 can balance the air pressure in the oil injection cavity 230, and facilitate the lubricating oil in the oil injection cavity 230 to be discharged.

[0066] In further embodiments, in the prior art, the circulation cooling speed of the lubricating oil cannot be real-time regulated according to the temperature of the lubricating oil when the lubricating oil is cooled, and the adaptability is poor, based on this, the oil injection pipe 220 is integrally arranged as a telescopic structure, so that the volumes of the cooling cavity 250 and the filtering cavity 240 in the oil injection pipe 220 are increased to fill more lubricating oil, and the volume of the cooling cavity 250 in the oil injection pipe 220 is positively correlated with the temperature of the lubricating oil, when the temperature of the lubricating oil is high, the overall circulation cooling speed needs to be improved, therefore the volume of the cooling cavity 250 is increased, so that the amount of lubricating oil circulated and cooled by the cooling cavity 250 is more, thereby improving the circulation cooling speed, when the temperature of the lubricating oil is low, the volume of the cooling cavity 250 is reduced, thereby adaptively reducing the circulation cooling speed.

[0067] Specifically, the part of the oil injection pipe 220 in the embodiment is composed of the corrugated pipe 260, specifically, the cooling cavity 250 and the filtering cavity 240 of the oil injection pipe 220 are composed of the corrugated pipe 260, the two ends of the corrugated pipe 260 are straight pipe parts, the first rotating plate 300, the second rotating plate 320 and the third rotating plate 340 are all located in the straight pipe parts, so as to avoid the influence of the expansion and contraction of the corrugated pipe 260 on the rotation of the first rotating plate 300, the second rotating plate 320 and the third rotating plate 340, in order to realize the active expansion and contraction of the corrugated pipe 260, the outer periphery of the two corrugated pipes 260 is provided with the expansion cylinder 270, the two ends of the expansion cylinder 270 are connected to the end of the filtering cavity 240 of the oil injection pipe 220 away from the cooling cavity 250 and the end of the cooling cavity 250 away from the filtering cavity 240 respectively, the expansion cylinder 270 is filled with gas, and the principle of thermal expansion and cold contraction of the gas is used, when the temperature rises, the gas expands, so that the expansion cylinder 270 is elongated, the end of the filtering cavity 240 of the oil injection pipe 220 away from the cooling cavity 250 and the end of the cooling cavity 250 away from the filtering cavity 240 are driven by the expansion cylinder 270 to move away from each other, so that the volume of the cooling cavity 250 and the filtering cavity 240 is increased, and more lubricating oil can be filled, the amount of lubricating oil for one cycle cooling is increased, and the efficiency of cycle cooling is improved.

[0068] Of course, an oil temperature sensor (not shown in the figure) can also be arranged in the bearing box 200, and the expansion cylinder 270 is replaced by an electric control push rod (not shown in the figure), and the length of the electric control push rod is dynamically adjusted according to the oil temperature data obtained by the oil temperature sensor, so as to adjust the volume of the cooling cavity 250 and the filtering cavity 240.

[0069] It should be noted that the widths of the second convex ring 420 and the third convex ring 430 in the embodiment are wide, so as to adapt to the volume change of the cooling cavity 250 and the filtering cavity 240, when the volume changes, the second sleeve 330 and the third sleeve 350 will move radially along the driving disc 400, therefore, the second convex ring 420 and the third convex ring 430 with wide width can adapt to the radial movement of the second sleeve 330 and the third sleeve 350, so as to avoid the second sleeve 330 and the third sleeve 350 from being separated from the second convex ring 420 and the third convex ring 430, and at the same time, the first limiting rod 360 and the second limiting rod 370 in the embodiment can be expanded and contracted to adapt to the volume change of the cooling cavity 250 and the filtering cavity 240.

[0070] More specifically, in order to improve the oil inlet rate when the oil injection pipe 220 enters the lubricating oil surface, the oil inlet screen pipe 280 is connected to the end of the filtering cavity 240 of the oil injection pipe 220 away from the cooling cavity 250, a plurality of through holes 234 are formed in the side wall of the oil inlet screen pipe 280, and the through holes 234 allow the lubricating oil to pass through, so that the oil inlet amount is increased when the filtering cavity 240 of the oil injection pipe 220 enters the lubricating oil.

[0071] The specific working process of the horizontal centrifugal pump provided by the application is described in combination with the above embodiments.

[0072] The driving motor 110 is started, the driving motor 110 drives the pump shaft 130 to rotate, the pump shaft 130 drives the impeller 140 to rotate to start working, when the pump shaft 130 rotates, the two bearings in the bearing box 200 rotate together, the lubricating oil in the bearing box 200 lubricates and cools the bearings, the oil throwing ring 210 on the pump shaft 130 drives the plurality of oil injection pipes 220 to revolve, when the oil injection pipe 220 rotates, it will pass above and below the lubricating oil surface constantly, when the oil injection pipe 220 enters below the lubricating oil surface, the first rotating plate 300, the second rotating plate 320 and the third rotating plate 340 in the oil injection pipe 220 will all be opened to make the lubricating oil enter into the filter cavity 240, the cooling cavity 250 and the oil injection cavity 230, when the oil injection pipe 220 rotates to the horizontal position, the third rotating plate 340 at the end of the filter cavity 240 away from the cooling cavity 250 will block the end to prevent the lubricating oil from flowing out, at the same time, the first rotating plate 300 and the second rotating plate 320 inside the oil injection pipe 220 are all in the opened state, so under the action of the centrifugal force generated when the oil injection pipe 220 rotates, the metal debris in the lubricating oil inside the oil injection pipe 220 will gradually move into the filter cavity 240, thereby reducing the metal debris content in the lubricating oil in the oil injection cavity 230 and the cooling cavity 250, and making most of the metal enter into the filter cavity 240, when the oil injection pipe 220 rotates to be about to extend above the lubricating oil surface, the first rotating plate 300 and the second rotating plate 320 in the oil injection pipe 220 will block the cooling cavity 250 and the filter cavity 240, the oil injection port 231 on the side wall of the oil injection cavity 230 corresponds to the arc-shaped groove 233 on the baffle 232, the lubricating oil in the oil injection cavity 230 is sprayed to the bearing from the oil injection port 231 under the action of the centrifugal force, thereby lubricating the part of the bearing that leaks out of the lubricating oil surface, with the rotation of the oil injection pipe 220, the filter cavity 240 of the oil injection pipe 220 gradually approaches the opening of the filter channel 241, when the filter cavity 240 corresponds to the opening of the filter channel 241, the third rotating plate 340 rotates by 90° to open the filter cavity 240, the lubricating oil in the filter cavity 240 enters into the filter channel 241 to be filtered and then flows back to the bearing box 200, with the continuous rotation of the oil injection pipe 220, the filter cavity 240 of the oil injection pipe 220 corresponds to the opening of the cooling channel 251, at this time, the second rotating plate 320 rotates by 90° to open the cooling cavity 250, the lubricating oil in the cooling cavity 250 enters into the cooling channel 251 to be cooled and circulated, and then flows back to the bearing box 200, to realize the functions of lubrication and cooling and temperature reduction.

[0073] The temperature in the bearing box 200 is increased:

[0074] When the temperature inside the bearing housing 200 rises, the temperature of the lubricating oil also rises. At this time, the gas inside the telescopic cylinder 270 on the outer periphery of the oil injection pipe 220 expands, and the length of the telescopic cylinder 270 extends, thereby increasing the volume of the cooling chamber 250 and the filter chamber 240 inside the oil injection pipe 220 to hold more lubricating oil. The amount of lubricating oil cooled by the cooling chamber 250 in one cycle increases, thereby improving the overall circulation cooling rate.

[0075] Temperature decreases inside bearing housing 200:

[0076] When the temperature inside the bearing housing 200 decreases, the temperature of the lubricating oil also decreases. At this time, the gas inside the telescopic cylinder 270 on the outer periphery of the oil injection pipe 220 contracts, and the length of the telescopic cylinder 270 shortens, thereby reducing the volume of the cooling chamber 250 and the filter chamber 240 inside the oil injection pipe 220 to fill less lubricating oil. The amount of lubricating oil cooled by the cooling chamber 250 in one cycle is reduced, thereby adaptively adjusting the overall circulating cooling rate.

[0077] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A horizontal centrifugal pump, characterized in that The utility model relates to a pump body, pump body is provided with the import and export, the pump body inside rotation is provided with the pump shaft, the pump shaft one end is provided with the impeller coaxially and fixedly, bearing box, bearing box is located in the pump body, bearing box is filled with lubricating oil, two bearings are connected with two bearings on the corresponding two side walls in the bearing box, two bearings inner ring coaxially and fixedly connect the other end of pump shaft, the pump shaft is provided with a pair of oil slinger in the bearing box inside, filter channel, filter channel is located above the oil slinger, and the filter screen is arranged in the filter channel. Oil injection pipe, oil injection pipe is arranged on the oil slinger, and the oil injection pipe extends along the radial direction of the oil slinger, and the oil injection pipe is sequentially provided with an oil injection cavity and a filter cavity in the radial direction from the oil slinger center to the oil slinger periphery. The oil injection pipe is configured to spray lubricating oil to the bearing when the oil injection cavity sprays lubricating oil to the bearing when the oil injection pipe is stretched out from the lubricating oil, and the filter cavity sprays lubricating oil to the opening of the filter channel when the filter cavity is close to the filter channel. The oil injection pipe is provided with a cooling cavity between the oil injection cavity and the filter cavity, and a cooling channel is provided below the filter channel. The oil injection pipe is provided with a switch assembly, and the switch assembly can control the opening and closing of the cooling cavity and the filter cavity. The switch assembly includes a first rotating plate, a second rotating plate, a third rotating plate and a driving disc.

2. The horizontal centrifugal pump according to claim 1, characterized in that The first rotating plate is rotatably arranged between the oil injection cavity and the cooling cavity, the second rotating plate is rotatably arranged between the cooling cavity and the filter cavity, the third rotating plate is rotatably arranged at one end of the filter cavity away from the cooling cavity, and the driving disc is fixedly arranged in the bearing box.

3. The horizontal centrifugal pump of claim 2, wherein The end surface of the driving disc is used to drive the first rotating plate, the second rotating plate and the third rotating plate to rotate.

4. The horizontal centrifugal pump of claim 3, wherein One end of the first sleeve is helically connected to the first rotating plate, one end of the second sleeve is helically connected to the second rotating plate, one end of the third sleeve is helically connected to the third rotating plate, and the driving disc is sequentially provided with a first convex ring, a second convex ring and a third convex ring along the radial direction from the center to the periphery of the end surface close to the oil injection pipe.

5. The horizontal centrifugal pump of claim 4, wherein The first convex ring is in sliding contact with the first sleeve, the second convex ring is in sliding contact with the second sleeve, and the third convex ring is in sliding contact with the third sleeve.

6. The horizontal centrifugal pump of claim 5, wherein The first sleeve is connected to the second sleeve, the second sleeve is connected to the third sleeve, the axes of the first sleeve, the second sleeve and the third sleeve are parallel to each other, and the three are allowed to move axially.

7. The horizontal centrifugal pump of claim 6, wherein The outer periphery of the first sleeve, the second sleeve and the third sleeve is provided with a sliding groove extending in the axial direction, a first limiting rod is slidably arranged in the sliding groove between the first sleeve and the second sleeve, and a second limiting rod is slidably arranged in the sliding groove between the second sleeve and the third sleeve.

8. The horizontal centrifugal pump of claim 2, wherein, The volume of the cooling cavity is positively correlated with the temperature of the lubricating oil.

9. The horizontal centrifugal pump of claim 8, wherein, The side wall of the oil injection pipe is a bellows, and an expansion cylinder is arranged on the outer periphery of the bellows, two ends of the expansion cylinder are connected to two ends of the bellows respectively, and the length of the expansion cylinder is positively correlated with the temperature of the lubricating oil.

10. The horizontal centrifugal pump of claim 9, wherein, The two ends of the bellows are straight pipe portions.

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