Lubricating oil tank for belt transmission disc separator

Abstract

The utility model discloses a lubricating oil tank for a belt transmission disc type separator, which comprises a lubricating oil tank body formed at the bottom of a disc type centrifugal force vertical shaft, an oil suction pipe arranged at the lower end of the vertical shaft and entering the lubricating oil tank body, and an oil return channel for returning lubricating oil to the lubricating oil tank body, the internal cooling structure is provided with a cold medium circulating part arranged in the lubricating oil tank body, and the cold medium circulating part and lubricating oil in the lubricating oil tank body are mutually separated to form non-contact heat exchange; and the circulating pipeline is connected with the cold medium circulating part, so that the cooling liquid circularly flows in the cold medium circulating part. According to the lubricating oil tank of the belt transmission disc type separator, the lubricating oil is cooled in various modes, and the oil temperature of the lubricating oil can be effectively reduced through the oil tank. Any mode can be used independently or used in a combined mode; cooling from outside to inside can be formed through the external cooling fins; and a cold medium can be introduced into the annular interlayer cavity arranged inside, so that the cooling efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of separation machinery, and particularly relates to a lubricating oil tank for a belt-driven disc separator. Background Art

[0002] A disc separator is a high-speed sedimentation centrifuge. With its high rotational speed and the powerful centrifugal force generated, it can quickly and effectively separate liquid from solid, or a mixture of two immiscible liquids and solids. Due to its efficient separation, it is widely used in industries such as ships, food, medicine, chemical industry, textile, and environmental protection.

[0003] The disc separator mainly consists of a motor, a vertical shaft system, a drum system, a frame, and inlet and outlet devices, etc. Among them, the drum system is the core and the main separation functional component; the vertical shaft system is the main guarantee component, playing a transmission role to ensure the normal operation of the drum component and the whole machine, and mainly includes a vertical shaft, a shock absorption device, a bearing seat, an upper bearing, a lower bearing, a pulley, a gland, a lubricating oil tank, etc.

[0004] When the belt-driven disc separator is running normally, it is necessary to ensure the normal lubricating oil supply to the bearings in the vertical shaft system, so as to ensure bearing lubrication and heat dissipation, maintain the thermal balance of the system, and ensure the normal and stable operation of the system. When the separator is working, lubricating oil is stored in the lubricating oil tank. Due to the high-speed rotation of the rotating parts (including the vertical shaft, pulley, bearings, etc.) in the vertical shaft system, the lubricating oil flows through the bearings via a fixed channel and returns to the lubricating oil tank. At this time, due to the friction generated by the high-speed rotation, the temperature of the lubricating oil will rise. If the temperature is too high, it will affect the service life of the bearings, thereby affecting the normal use of the separator.

[0005] In view of the above, it is necessary to propose a lubricating oil tank for a belt-driven disc separator to solve the above problems. Summary of the Utility Model

[0006] The purpose of the utility model is to overcome the defects existing in the prior art and provide a lubricating oil tank for a belt-driven disc separator.

[0007] To achieve the above purpose, the technical solution of the utility model is as follows: A lubricating oil tank for a belt-driven disc separator includes a lubricating oil tank body formed at the bottom of the vertical shaft of the disc centrifugal force. The lower end of the vertical shaft is provided with an oil suction pipe entering the lubricating oil tank body, and an oil return channel for the lubricating oil to return to the lubricating oil tank body. It includes an internal cooling structure, which is provided with a cold medium circulation part placed in the lubricating oil tank body. The cold medium circulation part and the lubricating oil in the lubricating oil tank body are separated from each other to form a non-contact heat exchange; it also includes a circulation pipeline, which is connected to the cold medium circulation part to make the coolant circulate in the cold medium circulation part.

[0008] Furthermore, the cold medium flow portion includes an annular sandwich cavity coaxially arranged with the oil suction pipe. A cavity for the cooling medium to flow through is provided inside the annular sandwich cavity, and the annular sandwich cavity is arranged to surround the oil suction pipe.

[0009] Furthermore, the circulation pipeline includes a liquid inlet joint and a liquid outlet joint. The liquid inlet joint is connected to the bottom of the annular sandwich cavity, and the liquid outlet joint is connected to the top of the annular sandwich cavity, so that the coolant fills and flows upward from bottom to top in the annular sandwich cavity; a bottom oil passage is formed at an interval between the bottom of the annular sandwich cavity and the inner bottom of the lubricating oil tank body.

[0010] Furthermore, it also includes various cooling forms of lubricating oil arranged outside or on the surface of the lubricating oil tank body, and the above-mentioned various cooling forms can be used alone or in combination.

[0011] Furthermore, it includes a surface cooling structure which is provided with external cooling fins. The external cooling fins are evenly distributed on the outer surface of the lubricating oil tank body, and the external cooling fins are radially distributed centered on the vertical axis.

[0012] Furthermore, it includes an external circulation cooling structure. A return oil pipe is provided at the upper part of the lubricating oil tank body, and an oil outlet pipe is provided at the bottom of the lubricating oil tank body, so that the lubricating oil in the lubricating oil tank body is led out through the oil outlet pipe to an external cooling device and circulates back through the return oil pipe.

[0013] Furthermore, a power paddle for driving the lubricating oil in the middle to flow downward is provided on the oil suction pipe; a guide cover structure opposite to the oil suction pipe is provided at the inner bottom of the lubricating oil tank body. The middle part of the guide cover structure is arched in a conical shape, and the arched conical part faces the oil suction pipe. The edge of the guide cover structure is provided with an upwardly tilted upward edge with an arc transition, and the leaving direction of the upward edge points to the bottom oil passage.

[0014] Furthermore, internal cooling fins are provided on the surface of the annular sandwich cavity, and the internal cooling fins are radially distributed centered on the vertical axis.

[0015] Furthermore, turbulence protrusions are provided on the surface of the internal cooling fins, and the turbulence protrusions of two adjacent internal cooling fins are arranged in a staggered manner.

[0016] Furthermore, the turbulence protrusion is in the shape of an arch bridge so as to form a flow-through channel inside it, and the flow-through channel leads to the surface of the annular sandwich cavity.

[0017] The lubricating oil tank reduces the temperature of the lubricating oil in three ways. First, a number of radiating fins welded on the circumferences of the upper body and the lower body of the tank are used to increase the heat dissipation area, thereby improving the heat dissipation efficiency to reduce the temperature of the lubricating oil. Second, an annular sandwich cavity is arranged inside the lower body of the tank. Cooling water enters the annular sandwich cavity from the cooling water inlet joint and then flows out from the cooling water outlet joint. The heat is carried away by the flow of the cooling water to reduce the temperature of the lubricating oil. Third, cooling is achieved through the external circulation mode of the lubricating oil. The lubricating oil is pumped out from the lubricating oil outlet joint by an oil pump, flows through a plate heat exchanger to reduce the temperature of the lubricating oil, and then returns to the lubricating oil tank through the lubricating oil inlet joint.

[0018] The advantages and beneficial effects of the present utility model are as follows: The lubricating oil tank for a belt-driven disc separator of the present utility model effectively solves the problem of the rising temperature of the lubricating oil in the belt-driven disc separator, provides a lubricating oil tank for a belt-driven disc separator, and cools the lubricating oil in multiple ways. This tank can effectively reduce the temperature of the lubricating oil. Any one of the methods can be used alone or in combination; the external cooling fins can form a temperature reduction from the outside to the inside; and the annular sandwich cavity arranged inside can be filled with a cold medium, effectively improving the temperature reduction efficiency. Further, the internal cooling fins are arranged to effectively increase the heat exchange area and improve the cooling effect. Brief Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of a lubricating oil tank for a belt-driven disc separator of the present utility model;

[0020] Figure 2 is one of the external structural diagrams of the lubricating oil tank body;

[0021] Figure 3 is another external structural diagram of the lubricating oil tank body;

[0022] Figure 4 is a schematic diagram of the external circulation of the lubricating oil in the annular sandwich cavity;

[0023] Figure 5 is a three-dimensional sectional view of the internal structure of the lubricating oil tank body;

[0024] Figure 6 is one of the schematic diagrams of the heat dissipation fins arranged outside the annular sandwich cavity;

[0025] Figure 7 is the three-view drawing of an internal cooling fin;

[0026] Figure 8 is another schematic diagram of the heat dissipation fins arranged outside the annular sandwich cavity;

[0027] Figure 9It is a schematic diagram of the external oil circulation of the lubricating oil tank for a belt-driven disc separator of the present utility model;

[0028] In the figure: 1. Vertical shaft; 2. Oil suction pipe; 3. Upper body of the oil tank; 4. Oil return baffle; 5. Oil return pipe; 6. Upper cooling fins; 8. Lower welded flange; 9. Upper welded flange; 10. Liquid inlet joint; 11. Lower cooling fins; 12. Oil outlet pipe; 13. Lower body of the oil tank; 14. Liquid outlet joint; 15. Sealing ring; 16. First bolt; 17. Second bolt; 18. Separator base; 19. Annular sandwich cavity; 20. Pulley; 21. Oil return channel; 22. Bottom oil passage; 23. External cooling equipment; 24. Power paddle; 25. Deflector structure; 26. Upward edge; 27. Internal cooling fins; 28. Turbulence protrusion; 29. Flow passage; 30. Longitudinal channel. Specific embodiments

[0029] The following combines the drawings and embodiments to further describe the specific embodiments of the present utility model. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model and cannot be used to limit the protection scope of the present utility model.

[0030] Embodiment 1:

[0031] A lubricating oil tank for a belt-driven disc separator, as shown in Figure 1 、 2 , includes a lubricating oil tank body formed at the bottom of the vertical shaft 1 of the disc centrifugal force. The lubricating oil tank body is divided into an upper body 3 of the oil tank and a lower body 13 of the oil tank. The main body of the upper body 3 of the oil tank is cylindrical, and the upper part is a labyrinth structure to prevent the lubricating oil from flowing out of the upper opening. The lower end of the vertical shaft 1 is provided with an oil suction pipe 2 that enters the lubricating oil tank body, and an oil return channel 21 for returning the lubricating oil to the lubricating oil tank body. An oil return baffle 4 is welded inside the lubricating oil tank body to prevent the lubricating oil from entering the labyrinth oil seal upward.

[0032] When the separator is running, the motor pulley drives the vertical shaft pulley 20 to rotate at a high speed through the belt, thereby driving the vertical shaft 1 to rotate at a high speed. The lower part of the vertical shaft 1 is provided with an oil suction pipe 2, and the lubricating oil in the lubricating oil tank is sucked up through high-speed rotation, flows through the bearing through the central fixed channel of the vertical shaft 1, and returns to the lubricating oil tank through the oil return channel 21 on the pulley 20. At this time, due to the friction generated by high-speed rotation, the temperature of the lubricating oil will rise.

[0033] During operation, it is necessary to reduce the temperature of the lubricating oil. Specifically, as shown in Figure 1 、 4As shown in FIGS. 5, in this embodiment, an internal cooling structure is included, which is provided with a cold medium flow-through part disposed in the lubricating oil tank body. The cold medium flow-through part and the lubricating oil in the lubricating oil tank body are separated from each other to form non-contact heat exchange. A circulation pipeline is also included, which is connected to the cold medium flow-through part to enable the coolant to circulate in the cold medium flow-through part. An annular sandwich cavity 19 is arranged inside the oil tank line body, and a liquid inlet joint 10 and a liquid outlet joint 14 are welded, which are communicated with the cooling water sandwich cavity. The cold medium flow-through part includes an annular sandwich cavity 19 coaxially arranged with the oil suction pipe 2. A cavity for the cooling medium to flow through is arranged inside the annular sandwich cavity 19, and the annular sandwich cavity 19 is arranged around the oil suction pipe 2. The circulation pipeline includes a liquid inlet joint 10 and a liquid outlet joint 14. The liquid inlet joint 10 is communicated with the bottom of the annular sandwich cavity 19, and the liquid outlet joint 14 is communicated with the top of the annular sandwich cavity 19, so that the coolant fills and flows upward in the annular sandwich cavity 19 from bottom to top. In this way, the cold medium can enter the annular sandwich cavity 19 from the liquid inlet joint 10 to form a flow and flow out from the liquid outlet joint 14, and the cooling capacity of the cold medium is used to exchange heat with the high-temperature lubricating oil in the lubricating oil tank body to achieve the purpose of cooling.

[0034] Embodiment Two:

[0035] Since the lubricating oil is usually placed statically in the lubricating oil tank body, as a result, the lubricating oil attached to the surface of the annular sandwich cavity 19 has a better cooling effect, and the farther away, the worse the effect. As an improvement, a bottom oil passage 22 is formed at an interval between the bottom of the annular sandwich cavity 19 and the inner bottom of the lubricating oil tank body. During actual production, a support frame can be welded between the bottom of the annular sandwich cavity 19 and the inner bottom wall of the oil tank, so that the annular sandwich cavity 19 can be suspended and supported. As Figure 4 、 5 shown, a power paddle 24 for driving the middle lubricating oil to flow downward is arranged on the oil suction pipe 2. It can be understood that since the rotational speed of the disc centrifuge is relatively high, the power paddle 24 provided in this embodiment can be set with a smaller paddle area and fewer paddle numbers according to its rotational speed, and a relatively flat paddle inclination angle is adopted, so that the lubricating oil can obtain a reasonable driving force from the power paddle 24, and the flow rate of the lubricating oil in the oil tank is increased to a certain extent.

[0036] Due to the push of the power paddle 24, as Figure 4As shown, a downward propulsive force in the same axial direction as the oil suction pipe 2 is imparted to the lubricating oil. Further, a flow guiding cover structure 25 opposite to the oil suction pipe 2 is provided at the inner bottom of the lubricating oil tank body. The middle part of the flow guiding cover structure 25 is arched in a conical shape, and the arched conical part faces the oil suction pipe 2. The edge of the flow guiding cover structure 25 is provided with an upwardly tilted upward edge 26 that is curved and transitions upward. The departing direction of the upward edge 26 points to the bottom oil passage 22. When the lubricating oil with obtained power moves downward, it collides with the flow guiding cover structure 25 and is guided by it. As Figure 4 shown by the dashed arrow in the figure, the lubricating oil forms a flowing pattern that circulates around the annular sandwich cavity 19; thus, compared with the first embodiment, in this embodiment, the lubricating oil obtains a certain reasonable flow velocity, thereby strengthening the convection of the lubricating oil and evenly reducing the oil temperature in the fuel tank. This embodiment can achieve a better cooling effect compared with the first embodiment.

[0037] Embodiment Three:

[0038] Further, it also includes various cooling forms of the lubricating oil provided outside or on the surface of the lubricating oil tank body, and the above-mentioned various cooling forms can be used alone or in combination. Specifically, as Figure 3 shown, it includes a surface cooling structure, which is provided with external cooling fins (including upper cooling fins 6 and lower cooling fins 11). The external cooling fins are evenly distributed on the outer surface of the lubricating oil tank body, and the external cooling fins are radially distributed centered on the vertical axis 1.

[0039] As Figure 1 , 3 shown, several upper cooling fins 6 are welded around the upper body 3 of the fuel tank, and a lower welding flange 8 is welded at the lower part for connecting with the lower body 13 of the fuel tank and fixing it on the separator base 18. The main body of the lower body 13 of the fuel tank is conical, and an upper welding flange 9 is welded at the upper part. A sealing ring 15 is provided between the upper body flange for sealing, and the upper and lower bodies of the fuel tank upper body 3 are connected by 8 first bolts 16. A circle of several lower cooling fins 11 is also welded around the lower body 13 of the fuel tank. After the upper body 3 and the lower body 13 of the fuel tank are connected, they are fixed on the separator base 18 by 8 second bolts 17.

[0040] Embodiment Four:

[0041] According to what is described in Embodiment Three, it also includes an external circulation cooling structure. A return oil pipe 5 is provided at the upper part of the lubricating oil tank body, and an oil outlet pipe 12 is provided at the bottom of the lubricating oil tank body, so that the lubricating oil in the lubricating oil tank body is led out to an external cooling device 23 through the oil outlet pipe 12 and circulates back through the return oil pipe 5. Specifically, as Figure 1As shown, a conical end at the bottom of the lower body 13 of the fuel tank is welded with an oil outlet pipe 12 that communicates with the inner cavity of the fuel tank. As an embodiment, it is cooled by the external circulation method of lubricating oil. The lubricating oil is pumped out from the lubricating oil outlet pipe 12 by an oil pump, and after flowing through a plate heat exchanger to reduce the temperature of the lubricating oil, it returns to the lubricating oil tank through the lubricating oil return pipe 5.

[0042] Embodiment Five:

[0043] As a combination of Embodiment One and Embodiment Four, when using Embodiment One alone, it is usually set to directly introduce cooling water into the annular sandwich cavity 19. In this case, there is a risk of leakage, which may lead to the emulsification and deterioration of the lubricating oil. This embodiment adopts a combined use method. As Figure 9 shown, the dotted arrow indicates the flow direction of the lubricating oil, and the solid arrow indicates the flow direction of the refrigerant. The lubricating oil is pumped through the oil outlet pipe 12 by an oil pump and sent to an external cooling device 23 (such as a heat exchanger) under pressure. After the lubricating oil is cooled by heat exchange, it enters the annular sandwich cavity 19 through the liquid inlet joint 10, realizing the self-cooling method of using cold oil to cool hot oil, and then flows into the lubricating oil tank body from the liquid outlet joint 14 to form a cycle. In actual use, the refrigerant in the external cooling device 23 can use internal air cooling, water cooling, Freon and other refrigerants to cool the lubricating oil in an isolated manner, and the pressure of the lubricating oil can be set higher than the pressure of the above refrigerants. Therefore, if a leakage occurs, it will be the lubricating oil that leaks to the outside, and the refrigerant will not enter the lubricating oil pipeline with a higher pressure. Moreover, the external leakage of the lubricating oil is relatively easy to detect, so the problem can be solved in time.

[0044] Embodiment Six:

[0045] As an improvement of Embodiment Two, internal cooling fins 27 are provided on the surface of the annular sandwich cavity 19, and the internal cooling fins 27 are radially distributed with the vertical axis 1 as the center. As Figure 6 shown, in this embodiment, the setting of the internal cooling fins 27 can effectively increase the heat exchange area, thereby improving the cooling effect on the lubricating oil.

[0046] Furthermore, as an improved embodiment, as Figure 7 、 8 shown, the surface of the internal cooling fins 27 is provided with turbulence protrusions 28, and the turbulence protrusions 28 of two adjacent internal cooling fins 27 are arranged in a staggered manner. The turbulence protrusions 28 are in an arch shape to form a flow-through channel 29 inside, and the flow-through channel 29 leads to the surface of the annular sandwich cavity 19. In the Figure 4 shown lubricating oil circulation flow direction, in order to improve the contact effect between the lubricating oil and the fins, it is advisable to make the lubricating oil form a turbulent flow effect. In this embodiment, as Figure 7As shown by the dashed arrows, the arch-shaped protrusions formed on the fin surface cause the oil between the two fins to flow back and forth in a wavy manner, which can improve the turbulence effect of the flowing lubricating oil, thereby increasing the heat transfer contact time; and the bottom of the arch can also provide an overflow channel 29 for the lateral flow of the oil, making it easier for the oil to approach the surface of the annular sandwich cavity 19; and, the turbulator protrusions 28 are not continuously arranged, and adjacent turbulator protrusions 28 form a longitudinal channel 30 in the longitudinal direction, causing the oil to form a surrounding flow as shown in Figure 4 shown.

[0047] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A lubricating oil tank for a belt-driven disc-type separator, comprising a lubricating oil tank body formed at the bottom of a disc-type centrifugal vertical shaft (1), an oil suction pipe (2) entering the lubricating oil tank body and an oil return channel (21) for returning lubricating oil to the lubricating oil tank body being provided at the lower end of the vertical shaft (1), It is characterized in that It includes an internal cooling structure, which is provided with a cold medium circulation part placed in the lubricating oil box body, and the cold medium circulation part and the lubricating oil in the lubricating oil box body are separated from each other to form a non-contact heat exchange; it also includes a circulation pipeline, which is connected to the cold medium circulation part so that the coolant circulates in the cold medium circulation part.

2. A lubricating oil tank for a belt-driven disc separator according to claim 1, characterized in that: The cold medium circulation portion comprises an annular sandwich cavity (19) arranged coaxially with the oil suction pipe (2), a cavity for the circulation of the cooling medium being arranged inside the annular sandwich cavity (19), and the annular sandwich cavity (19) is arranged around the oil suction pipe (2).

3. A lubricating oil tank for a belt-driven disc separator according to claim 2, characterized in that: The circulation pipeline comprises a liquid inlet joint (10) and a liquid outlet joint (14); the liquid inlet joint (10) is connected to the bottom of the annular sandwich cavity (19), and the liquid outlet joint (14) is connected to the top of the annular sandwich cavity (19), so that the cooling liquid fills and flows from bottom to top in the annular sandwich cavity (19); the bottom of the annular sandwich cavity (19) is spaced apart from the bottom of the lubricating oil tank body to form a bottom oil passage (22).

4. The lubricating oil tank for a belt-driven disc separator according to claim 1, characterized in that: It also includes a variety of cooling forms of lubricating oil arranged on the outside or surface of the lubricating oil tank, and the above-mentioned various cooling forms can be used alone or in combination.

5. A lubricating oil tank for a belt-driven disc separator according to claim 4, characterized in that: It comprises a surface cooling structure, which is provided with external cooling fins, wherein the external cooling fins are evenly distributed on the outer surface of the lubricating oil tank body, and the external cooling fins are radially distributed with the vertical shaft (1) as the center.

6. A lubricating oil tank for a belt-driven disc separator according to claim 4, characterized in that: It comprises an external circulation cooling structure, wherein the upper part of the lubricating oil box is provided with an oil return pipe (5), and the bottom of the lubricating oil box is provided with an oil outlet pipe (12), so that the lubricating oil in the lubricating oil box is discharged to the external cooling device (23) through the oil outlet pipe (12) and circulates back from the oil return pipe (5).

7. The lubricating oil tank for a belt-driven disc separator according to claim 3, characterized in that: The oil suction pipe (2) is provided with a power blade (24) for driving the lubricating oil in the middle to flow downward; the inner bottom of the lubricating oil box body is provided with a guide cover structure (25) opposite to the oil suction pipe (2); the middle part of the guide cover structure (25) is conically arched, and the arched conical part faces the oil suction pipe (2); the edge of the guide cover structure (25) is provided with an upwardly curved edge (26) in an arc-shaped transition, and the departure direction of the upwardly curved edge (26) is directed to the bottom oil passage (22).

8. A lubricating oil tank for a belt-driven disc separator according to any one of claims 2, 3 and 7, characterized in that: The surface of the annular sandwich cavity (19) is provided with internal cooling fins (27), and the internal cooling fins (27) are distributed radially with the vertical shaft (1) as the center.

9. A lubricating oil tank for a belt-driven disc separator according to claim 8, characterized in that: The surface of the internal cooling fin (27) is provided with a spoiler protrusion (28), and the spoiler protrusions (28) of two adjacent internal cooling fins (27) are arranged in a staggered manner with respect to each other.

10. A lubricating oil tank for a belt-driven disc separator according to claim 9, characterized in that: The flow-disturbing protrusion (28) is in the shape of an arch bridge, and a flow passage (29) is formed on its inner side, and the flow passage (29) leads to the surface of the annular sandwich cavity (19).

Images