A bearing box high-efficiency lubricating structure for a vertical long-shaft pump

Abstract

This invention discloses a high-efficiency lubrication structure for a bearing housing of a vertical long-shaft pump. The bearing housing body is sleeved on the outside of a long-shaft body. The bearing housing body includes an inner bushing and an outer bushing. The outer bushing is coaxially sleeved on the outside of the inner bushing, and the inner bushing is interference-fitted onto the outer wall of the long-shaft body. By setting up this bearing housing lubrication structure, during the operation of the vertical long-shaft pump, the lifting section agitates the lubricating oil inside the oil storage chamber, causing it to rotate at high speed and undergo centrifugal motion. The oil is forced into the top cavity through the upper through-hole, achieving oil immersion lubrication of the upper bearing and improving its lubrication effect. The lubricating oil flows through the overflow hole to the lower annular groove, fully lubricating the lower bearing. The lubrication method is a flowing circulation lubrication, ensuring sufficient contact. During the lubricating oil circulation process, it cooperates with the sealing box and its internal water cooling system to achieve a cooling effect for the lubrication system, ensuring sufficient lubrication and cooling inside the bearing housing and extending the service life of the device.

Description

Technical Field

[0001] This invention relates to the field of lubrication technology for vertical long-shaft pumps in water treatment, and in particular to a high-efficiency lubrication structure for bearing housings of vertical long-shaft pumps. Background Technology

[0002] Vertical long-shaft pumps are widely used in the metallurgical industry for conveying various liquids, characterized by safety, reliability, and long service life. In practical applications, bearing housings are typically used to support the long shaft of the pump to improve its operational stability. Simultaneously, ensuring lubrication of the bearing housing and the pump itself reduces wear between components. Due to the long shaft and high torque of the vertical long-shaft pump, the bearings within the bearing housing require timely lubrication and cooling. The effectiveness of bearing lubrication and cooling in vertical long-shaft pumps determines the equipment's service life and maintenance costs.

[0003] In existing technology, the lubrication effect of the upper bearing in the bearing housing installed on the long shaft of the vertical long shaft pump is not good, and the temperature rises after long-term operation, which reduces the service life of the device.

[0004] This invention addresses the aforementioned problems by developing a high-efficiency lubrication structure for a bearing housing of a vertical long-shaft pump. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a high-efficiency lubrication structure for a bearing housing of a vertical long-shaft pump. When the vertical long-shaft pump is working, the lifting part agitates the lubricating oil inside the oil storage chamber, causing it to rotate at high speed and undergo centrifugal motion. The oil is squeezed into the top cavity through the upper through hole, achieving oil immersion lubrication of the upper bearing and improving the lubrication effect of the upper bearing. The lubricating oil flows to the lower annular groove through the overflow hole, fully lubricating the lower bearing. The lubrication method is a flowing circulation lubrication, ensuring sufficient contact. During the circulation of the lubricating oil, it cooperates with the sealing box and its internal water cooling system to achieve a cooling effect for the lubrication system, thereby solving the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A high-efficiency lubrication structure for a bearing housing of a vertical long-shaft pump includes a bearing housing body, which is sleeved on the outside of a long-shaft body. The bearing housing body includes an inner bushing and an outer bushing. The outer bushing is coaxially sleeved on the outside of the inner bushing, and the inner bushing is interference-fitted on the outer wall of the long-shaft body. The outer bushing is fixed on an external frame, and the long-shaft body moves relative to the external frame.

[0008] An upper annular groove is reserved at the top of the connection between the outer and inner bushings, and a lower annular groove is reserved at the bottom of the connection between the outer and inner bushings. An upper bearing and a lower bearing are respectively installed in the upper and lower annular grooves to allow the outer bushing and the inner bushing to rotate. A sealing plate is installed at the top and bottom of the outer bushing. The long shaft body passes through the sealing plate, and the long shaft body and the sealing plate are rotatably connected by a sealed bearing. An annular groove is opened on the surface of the sealing plate, and a sealing ring is embedded in the annular groove. The two sealing rings are respectively matched with the upper annular groove and the lower annular groove.

[0009] An oil storage chamber is provided in the inner bushing shaft hole for filling lubricating oil. An upper through hole is provided between the top of the oil storage chamber and the upper annular groove, and a lower through hole is provided between the bottom of the oil storage chamber and the lower annular groove. A first spiral groove is provided on the inner wall of the outer bushing, and a second spiral groove is provided on the outer wall of the inner bushing. The first spiral groove and the second spiral groove are combined to form a spiral overflow hole.

[0010] The oil storage chamber is equipped with a lifting part. When the long shaft body rotates, the lifting part is driven to make the lubricating oil in the oil storage chamber rise under the action of centrifugal force and enter the circulating lubrication system composed of the upper annular groove, lower annular groove, overflow hole and lower through hole through the upper through hole.

[0011] Preferably, the depth of the upper annular groove is greater than the thickness of the upper bearing, and the depth of the lower annular groove is greater than the thickness of the lower bearing, so that the top of the upper annular groove and the bottom of the lower annular groove both have cavities, and the overflow hole connects the upper annular groove and the lower annular groove.

[0012] Preferably, the upper through hole is set as an arc segment, and the bottom end of the upper through hole is located above the oil storage chamber, the top end of the upper through hole corresponds to the cavity at the top, and the inner diameter of the upper through hole gradually increases from the top end to the bottom end.

[0013] The lower through holes are horizontally distributed and correspond to the cavity at the bottom. A one-way valve is provided inside the lower through holes.

[0014] Preferably, the number of upper through holes is at least one, and the number of lower through holes is at least one.

[0015] Preferably, an exhaust pipe runs through the top closed plate and corresponds to the cavity at the top, and an exhaust valve is installed inside the exhaust pipe.

[0016] Preferably, a flow replenishment pipe runs through the bottom closed plate and corresponds to the bottom cavity. A three-way valve is installed at the bottom end of the flow replenishment pipe, and the other two ports of the three-way valve are connected to the air pump and the oil pump, respectively.

[0017] Preferably, a measuring box is also installed on the outside of the long shaft body. An immersion liquid level sensor and an immersion pressure sensor are installed inside the measuring box. The immersion liquid level sensor and the immersion pressure sensor are electrically connected to an external power supply through a conductive slip ring. The transmission cables of the immersion liquid level sensor and the immersion pressure sensor are embedded inside the long shaft body, and the embedding holes are filled with sealant. The probes of the immersion liquid level sensor and the immersion pressure sensor extend to the bottom of the inner side of the oil storage chamber.

[0018] The submersible level sensor and submersible pressure sensor are connected to a microcontroller at their connection points, and the submersible level sensor and submersible pressure sensor are wirelessly connected to the microcontroller. The microcontroller is equipped with an A / D converter and a D / A converter at its input and output points, respectively. The microcontroller is connected to a display screen. The submersible level sensor and submersible pressure sensor are both electrically connected to the A / D converter, and the air pump and oil pump are both electrically connected to the D / A converter.

[0019] Preferably, a sealing box is fitted around the outer bushing, and the sealing box and the sealing plate are sealed by graphite packing.

[0020] A gap is reserved between the outer bushing and the sealing box, and a water storage tank is provided on the inner wall of the sealing box, with heat exchange fins between two adjacent water storage tanks.

[0021] The sealed box has an inlet pipe and a drain pipe running through it on one side. The inlet pipe and the drain pipe are used for coolant circulation and heat exchange through a water pump.

[0022] Preferably, the lifting part is configured as a trapezoidal spiral protrusion, and the trapezoidal spiral protrusion is fixed to the inner wall of the oil storage chamber.

[0023] Preferably, the lifting part is configured as a hydra, and the hydra is fixed to the outer wall of the long axis body.

[0024] The present invention has the following beneficial effects:

[0025] 1. By setting up the lubrication structure of this bearing housing, when the vertical long shaft pump is working, the lifting part agitates the lubricating oil inside the oil storage chamber, causing it to rotate at high speed and centrifugally. The oil is squeezed into the top cavity through the upper through hole, realizing the oil immersion lubrication of the upper bearing and improving the lubrication effect of the upper bearing. The lubricating oil flows to the lower annular groove through the overflow hole, fully lubricating the lower bearing. The lubrication method is a flowing circulation lubrication with sufficient contact. During the circulation of the lubricating oil, it cooperates with the sealing box and the water cooling system inside to achieve the cooling effect of the lubrication system, so that the bearing housing is fully lubricated and cooled, extending the service life of the device.

[0026] 2. By using submersible level sensors and submersible pressure sensors, the remaining amount of lubricating oil and the oil pressure in the oil storage chamber are sensed respectively. An embedded sealing structure that rotates with the long shaft body is designed. By using conductive slip rings and wireless communication technology, the movement status of the long shaft body can be effectively monitored, and the lubrication status of the bearing can be observed and controlled, thereby improving the safety and intelligence of the device. Attached Figure Description

[0027] Figure 1 An overall perspective view of the high-efficiency lubrication structure of the bearing housing for a vertical long-shaft pump provided by the present invention;

[0028] Figure 2 An exploded first-view view of the high-efficiency lubrication structure for the bearing housing of the vertical long-shaft pump provided by the present invention;

[0029] Figure 3 Exploded view from a second perspective of the high-efficiency lubrication structure for the bearing housing of the vertical long-shaft pump provided by the present invention;

[0030] Figure 4 A first-person perspective perspective sectional view of the high-efficiency lubrication structure of the bearing housing for the vertical long-shaft pump provided by the present invention.

[0031] Figure 5 A second-view perspective perspective view showing the high-efficiency lubrication structure of the bearing housing for the vertical long-shaft pump provided by the present invention;

[0032] Figure 6 This is a rendering of the internal structure of the high-efficiency lubrication structure for the bearing housing provided by the present invention.

[0033] Figure 7 The control flowchart of the intelligent control system provided by the present invention.

[0034] Among them are:

[0035] Bearing housing body-1; Long shaft body-2; Exhaust pipe-3; Make-up pipe-4; Measuring box-5; Submersible liquid level sensor-6; Submersible pressure sensor-7; Microcontroller-8; Display screen-9; Air pump-10; Oil pump-11; Sealing box-12; Water storage tank-13; Water inlet pipe-14; Drain pipe-15;

[0036] Inner bushing-101; Outer bushing-102; Upper annular groove-103; Lower annular groove-104; Upper bearing-105; Lower bearing-106; Sealing plate-107; Sealed bearing-108; Sealing ring-109; Oil storage chamber-110; Upper through hole-111; Lower through hole-112; First spiral groove-113; Second spiral groove-114; Overflow hole-115; Lifting part-116; Check valve-117. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

[0038] In the description of this invention, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and 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. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this invention. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the scope of protection of this invention.

[0039] like Figure 1-6 As shown, a high-efficiency lubrication structure for a bearing housing of a vertical long shaft pump includes a bearing housing body 1, which is sleeved on the outside of a long shaft body 2. The bearing housing body 1 includes an inner bushing 101 and an outer bushing 102. The outer bushing 102 is coaxially sleeved on the outside of the inner bushing 101, and the inner bushing 101 is interference-fitted on the outer wall of the long shaft body 2. The outer bushing 102 is fixed on an external frame, and the long shaft body 2 moves relative to the external frame.

[0040] An upper annular groove 103 is reserved at the top position of the connection between the outer bushing 102 and the inner bushing 101, and a lower annular groove 104 is reserved at the bottom position of the connection between the outer bushing 102 and the inner bushing 101. An upper bearing 105 and a lower bearing 106 are respectively provided in the upper annular groove 103 and the lower annular groove 104, so that the outer bushing 102 and the inner bushing 101 can rotate together. A sealing plate 107 is installed at the top and bottom of the outer bushing 102. The long shaft body 2 passes through the sealing plate 107, and the long shaft body 2 and the sealing plate 107 are rotatably connected by a sealing bearing 108. An annular groove is opened on the surface of the sealing plate 107, and a sealing ring 109 is embedded in the annular groove. The two sealing rings 109 are matched with the upper annular groove 103 and the lower annular groove 104 respectively to prevent lubricating oil from overflowing.

[0041] An oil storage chamber 110 is provided in the axial hole of the inner bushing 101 for filling with lubricating oil. The amount of lubricating oil added is usually controlled to be 1 / 2 to 2 / 3 of the volume of the oil storage chamber 110. An upper through hole 111 is provided between the top of the oil storage chamber 110 and the upper annular groove 103, and a lower through hole 112 is provided between the bottom of the oil storage chamber 110 and the lower annular groove 104. A first spiral groove 113 is provided on the inner wall of the outer bushing 102, and a second spiral groove 114 is provided on the outer wall of the inner bushing 101. The first spiral groove 113 and the second spiral groove 114 are joined together to form a spiral overflow hole 115.

[0042] The oil storage chamber 110 is provided with a lifting part 116 inside. When the long shaft body 2 rotates, the lifting part 116 is driven to make the lubricating oil in the oil storage chamber 110 rise under the action of centrifugal force and enter the circulating lubrication system composed of the upper annular groove 103, the lower annular groove 104, the overflow hole 115 and the lower through hole 112 through the upper through hole 111.

[0043] Specifically, the depth of the upper annular groove 103 is greater than the thickness of the upper bearing 105, and the depth of the lower annular groove 104 is greater than the thickness of the lower bearing 106, so that the top of the upper annular groove 103 and the bottom of the lower annular groove 104 both have cavities, which facilitates oil storage. The overflow hole 115 connects the upper annular groove 103 and the lower annular groove 104, so that the oil in the circulating lubrication system can flow smoothly.

[0044] Specifically, the upper through hole 111 is set as an arc segment, and the bottom end of the upper through hole 111 is located above the oil storage chamber 110. The top end of the upper through hole 111 corresponds to the top cavity. The inner diameter of the upper through hole 111 gradually increases from the top end to the bottom end. After the lubricating oil is lifted, it is easy to squeeze into the top cavity and it is not easy to flow back from the upper through hole 111, thereby realizing the oil immersion lubrication of the upper bearing 105.

[0045] The lower through holes 112 are horizontally distributed and correspond to the cavity at the bottom. A one-way valve 117 is provided in the lower through holes 112 to facilitate the flow and circulation of lubricating oil and prevent oil backflow.

[0046] Specifically, the number of upper through holes 111 is set to at least one, and the number of lower through holes 112 is set to at least one. In this specific embodiment, both the upper through holes 111 and the lower through holes 112 are set to four, and the four upper through holes 111 and the four lower through holes 112 are arranged in a ring array. The four upper through holes 111 are distributed one-to-one directly below the four lower through holes 112.

[0047] Specifically, an exhaust pipe 3 runs through the top closed plate 107, and the exhaust pipe 3 corresponds to the cavity at the top. An exhaust valve is installed inside the exhaust pipe 3. This structure is similar to the exhaust structure of an intravenous syringe, which allows the oil in the circulating lubrication system to flow effectively while preventing oil from overflowing.

[0048] Specifically, a flow replenishment pipe 4 runs through the bottom closed plate 107, and the flow replenishment pipe 4 corresponds to the bottom cavity. A three-way valve is installed at the bottom end of the flow replenishment pipe 4. The other two ports of the three-way valve are connected to the air pump 10 and the oil pump 11, respectively. The oil pump 11 can replenish the lubricating oil inside the oil storage chamber 110, or disconnect the connector to replace the lubricating oil inside. The air pump 10 pressurizes the oil storage chamber 110, thereby improving the lifting efficiency of the lubricating oil during the rotation of the long shaft body 2. The oil pressure inside the oil storage chamber 110 is usually set to be greater than 50 kPa to ensure that the oil is sprayed to the top of the upper bearing 105 and that the upper bearing 105 is properly lubricated.

[0049] Specifically, a sealing box 12 is fitted onto the outside of the outer bushing 102, and the sealing box 12 and the sealing plate 107 are sealed by graphite packing. When the sealing plate 107 and the outer bushing 102 are tightened with bolts, the graphite packing is pressed into the edge groove to ensure the bearing box is sealed.

[0050] A gap is reserved between the outer bushing 102 and the sealing box 12, and a water storage tank 13 is provided on the inner wall of the sealing box 12, with heat exchange fins between two adjacent water storage tanks 13.

[0051] A water inlet pipe 14 and a drain pipe 15 pass through one side of the sealed box 12. The water inlet pipe 14 and the drain pipe 15 are used for coolant circulation and heat exchange through a water pump.

[0052] In a preferred embodiment of the lifting part 116, the lifting part 116 is configured as a trapezoidal spiral protrusion plate, which is fixed inside the oil storage chamber 110. The height of the trapezoidal spiral protrusion plate can be set to the upper half of the inner bottom of the oil storage chamber 110. In specific processing, the thickness and length of the trapezoidal spiral protrusion plate can be designed as needed, and the shape of the spiral can also be changed to improve the lifting effect on the lubricating oil.

[0053] In another preferred embodiment of the lifting part 116, the lifting part 116 is configured as a hydra, and the hydra is fixed to the outer wall of the long shaft body 2.

[0054] To facilitate the observation of the remaining lubricating oil and oil pressure in the oil storage chamber 110, the following optimization scheme is proposed:

[0055] like Figure 6-7As shown, a measuring box 5 is installed on the outside of the long shaft body 2, and an immersion-type liquid level sensor 6 and an immersion-type pressure sensor 7 are installed inside the measuring box 5 to sense the remaining amount of lubricating oil and the oil pressure in the oil storage chamber 110, respectively. The immersion-type liquid level sensor 6 and the immersion-type pressure sensor 7 are electrically connected to an external power supply through a conductive slip ring. The transmission cables of the immersion-type liquid level sensor 6 and the immersion-type pressure sensor 7 are embedded inside the long shaft body 2, and the embedding holes are filled with sealant. The probes of the immersion-type liquid level sensor 6 and the immersion-type pressure sensor 7 extend to the bottom of the inner side of the oil storage chamber 110, so that this structure can effectively monitor the lubrication of the bearing even when the long shaft body 2 is rotating.

[0056] The submersible level sensor 6 and the submersible pressure sensor 7 are connected to a microcontroller 8, and the submersible level sensor 6 and the submersible pressure sensor 7 are wirelessly connected to the microcontroller 8. The input and output terminals of the microcontroller 8 are respectively equipped with an A / D converter and a D / A converter. The connection terminal of the microcontroller 8 is equipped with a display screen 9. The submersible level sensor 6 and the submersible pressure sensor 7 are both electrically connected to the A / D converter. The air pump 10 and the oil pump 11 are both electrically connected to the D / A converter.

[0057] The high-efficiency lubrication structure for bearing housing of the vertical long-shaft pump provided by the present invention is installed on the long shaft body 2 of the vertical long-shaft pump. When the vertical long-shaft pump is working, its long shaft body 2 rotates at high speed and drives the inner bushing 101 to rotate. Under the action of the lifting part 116, the lubricating oil inside the oil storage chamber 110 is stirred and lifted by the centrifugal force generated by its high-speed rotation. It is squeezed into the top cavity through the upper through hole 111 to realize the oil immersion lubrication of the upper bearing 105 and improve the lubrication effect of the upper bearing 105. The lubricating oil flows to the lower annular groove 104 through the overflow hole 115 to fully lubricate the lower bearing 106. During the circulation of the lubricating oil, it cooperates with the sealing box 12 and the water cooling system installed inside to cool the lubrication system.

[0058] The remaining amount of lubricating oil and the oil pressure in the oil storage chamber 110 are sensed by the submersible liquid level sensor 6 and the submersible pressure sensor 7, respectively. An embedded sealing structure that rotates with the long shaft body 2 is designed. By using conductive slip rings and wireless communication technology, the movement of the long shaft body 2 can be effectively monitored, and the lubrication of the bearing can be observed and controlled.

[0059] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A high-efficiency lubrication structure for a bearing housing of a vertical long-shaft pump, comprising a bearing housing body (1), wherein the bearing housing body (1) is sleeved on the outside of a long-shaft body (2), characterized in that: The bearing housing body (1) includes an inner bushing (101) and an outer bushing (102). The outer bushing (102) is coaxially sleeved on the outside of the inner bushing (101), and the inner bushing (101) is interference-fitted on the outer wall of the long shaft body (2). The outer bushing (102) is fixed on the external frame, and the long shaft body (2) moves relative to the external frame. An upper annular groove (103) is reserved at the top position of the connection between the outer bushing (102) and the inner bushing (101), and a lower annular groove (104) is reserved at the bottom position of the connection between the outer bushing (102) and the inner bushing (101). An upper bearing (105) and a lower bearing (106) are respectively provided in the upper annular groove (103) and the lower annular groove (104) to enable the outer bushing (102) and the inner bushing (101) to rotate together. (102) has a sealing plate (107) installed at both the top and bottom. The long shaft body (2) passes through the sealing plate (107), and the long shaft body (2) and the sealing plate (107) are rotatably connected by a sealed bearing (108). The surface of the sealing plate (107) is provided with an annular groove, and a sealing ring (109) is embedded inside the annular groove. The two sealing rings (109) are respectively matched with the upper annular groove (103) and the lower annular groove (104). A flow supply pipe (4) runs through the bottom closed plate (107), and the flow supply pipe (4) corresponds to the bottom cavity. A three-way valve is installed at the bottom end of the flow supply pipe (4), and the other two ports of the three-way valve are connected to the air pump (10) and the oil pump (11) respectively. The inner bushing (101) has an oil storage chamber (110) in its shaft hole for filling with lubricating oil. An upper through hole (111) is formed between the top of the oil storage chamber (110) and the upper annular groove (103), and a lower through hole (112) is formed between the bottom of the oil storage chamber (110) and the lower annular groove (104). The inner wall of the outer bushing (102) has a first spiral groove (113), and the outer wall of the inner bushing (101) has a second spiral groove (114). The first spiral groove (113) and the second spiral groove (114) are joined together to form a spiral overflow hole (115). The oil storage chamber (110) is provided with a lifting part (116) inside. When the long shaft body (2) rotates, the lifting part (116) is driven to make the lubricating oil in the oil storage chamber (110) rise under the action of centrifugal force and enter the circulating lubrication system composed of the upper annular groove (103), the lower annular groove (104), the overflow hole (115) and the lower through hole (112) through the upper through hole (111); A measuring box (5) is also installed on the outside of the long shaft body (2). An immersion liquid level sensor (6) and an immersion pressure sensor (7) are installed inside the measuring box (5). The immersion liquid level sensor (6) and the immersion pressure sensor (7) are electrically connected to an external power supply through a conductive slip ring. The transmission cables of the immersion liquid level sensor (6) and the immersion pressure sensor (7) are embedded inside the long shaft body (2), and the embedded holes are filled with sealant. The probes of the immersion liquid level sensor (6) and the immersion pressure sensor (7) extend to the bottom of the inner side of the oil storage chamber (110). The submersible level sensor (6) and the submersible pressure sensor (7) are connected to a microcontroller (8), and the submersible level sensor (6) and the submersible pressure sensor (7) are wirelessly connected to the microcontroller (8). The input and output terminals of the microcontroller (8) are respectively equipped with an A / D converter and a D / A converter. The connection terminal of the microcontroller (8) is equipped with a display screen (9). The submersible level sensor (6) and the submersible pressure sensor (7) are both electrically connected to the A / D converter. The air pump (10) and the oil pump (11) are both electrically connected to the D / A converter.

2. The high-efficiency lubrication structure for a bearing housing of a vertical long-shaft pump according to claim 1, characterized in that: The depth of the upper annular groove (103) is greater than the thickness of the upper bearing (105), and the depth of the lower annular groove (104) is greater than the thickness of the lower bearing (106), so that the top of the upper annular groove (103) and the bottom of the lower annular groove (104) both have cavities, and the overflow hole (115) connects the upper annular groove (103) and the lower annular groove (104).

3. The high-efficiency lubrication structure for a bearing housing of a vertical long-shaft pump according to claim 1, characterized in that: The upper through hole (111) is set as an arc segment, and the bottom end of the upper through hole (111) is located above the oil storage cavity (110). The top end of the upper through hole (111) corresponds to the cavity at the top. The inner diameter of the upper through hole (111) gradually increases from the top end to the bottom end. The lower through holes (112) are horizontally distributed and correspond to the cavity at the bottom. A one-way valve (117) is provided in the lower through holes (112).

4. The high-efficiency lubrication structure for a bearing housing of a vertical long-shaft pump according to claim 3, characterized in that: The number of upper through holes (111) is set to at least one, and the number of lower through holes (112) is set to at least one.

5. The high-efficiency lubrication structure for a bearing housing of a vertical long-shaft pump according to claim 1, characterized in that: An exhaust pipe (3) is passed through the top closed plate (107), and the exhaust pipe (3) corresponds to the cavity at the top. An exhaust valve is installed inside the exhaust pipe (3).

6. The high-efficiency lubrication structure for a bearing housing of a vertical long-shaft pump according to claim 1, characterized in that: The outer bushing (102) is fitted with a sealing box (12), and the sealing box (12) and the sealing plate (107) are sealed by graphite packing. A gap is reserved between the outer bushing (102) and the sealing box (12), and a water storage tank (13) is provided on the inner wall of the sealing box (12), with heat exchange fins between two adjacent water storage tanks (13); The sealed box (12) has an inlet pipe (14) and a drain pipe (15) running through one side. The inlet pipe (14) and the drain pipe (15) are circulated and heat exchanged by a water pump.

7. The high-efficiency lubrication structure for a bearing housing of a vertical long-shaft pump according to claim 1, characterized in that: The lifting part (116) is configured as a trapezoidal spiral protrusion, and the trapezoidal spiral protrusion is fixed to the inner wall of the oil storage chamber (110).

8. The high-efficiency lubrication structure for a bearing housing of a vertical long-shaft pump according to claim 1, characterized in that: The lifting part (116) is configured as a dragon row, and the dragon row is fixed to the outer wall of the long shaft body (2).

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