A ball mill cooling system

Abstract

The present application relates to the field of crushing technology, and discloses a ball mill cooling system, in order to solve the problem that the lubricating oil in the oil tank always has a high temperature, which affects the cooling effect of the ball mill bearings and gears. The present invention adds a new low-pressure oil pump and a shell-and-tube heat exchanger on one side of the oil tank through the arrangement of a low-pressure oil pump and a shell-and-tube heat exchanger, so that the lubricating oil in the oil tank is directly pumped out from the high-pressure side of the oil tank by the low-pressure oil pump and enters the corresponding shell-and-tube heat exchanger, and then the cooled lubricating oil returns to the low-pressure side of the oil tank. Through the above action, the lubricating oil in the oil tank has a lower temperature, thereby improving the cooling effect of the lubricating oil on the ball mill bearings and gears.

Description

Technical Field

[0001] The present application relates to the field of pulverizing technology, and in particular to a ball mill cooling system. Background Art

[0002] The ball mill is a key equipment for crushing materials after they are broken. When in use, it is often necessary to use a cooling system to provide lower temperature lubricating oil to the bearings and gears of the ball mill (to cool and lubricate both) so that the rotation of the ball mill can proceed smoothly.

[0003] Some existing ball mill cooling systems usually consist of an oil tank, an oil pump, a filter and a shell-and-tube heat exchanger. When in use, the lubricating oil in the oil tank is pumped out by the oil pump and transported to the filter to separate the impurities in the lubricating oil. Afterwards, the lubricating oil enters the shell-and-tube heat exchanger to cool the lubricating oil at a higher temperature. Then, the cooled lubricating oil enters the bearings and gears to lubricate and cool them. Finally, the lubricating oil separated from the bearings and gears returns to the oil tank and the above operation is repeated. Through the above actions, the lubrication and cooling operations of the bearings and gears of the ball mill are achieved.

[0004] However, in the above process, the cooled lubricating oil will heat up again after passing through the ball mill bearings and gears. As a result, the lubricating oil in the oil tank always has a high temperature. Even in the subsequent process, the lubricating oil in the oil tank will be cooled by the shell-and-tube heat exchanger, but due to the large flow rate and fast flow rate of the lubricating oil passing through the shell-and-tube heat exchanger, the cooling effect of the lubricating oil in the oil tank on the ball mill bearings and gears is poor. Summary of the invention

[0005] The present application proposes a ball mill cooling system, which has the advantage of improving the cooling effect of lubricating oil, and is used to solve the problem that the lubricating oil in the oil tank always has a high temperature, which affects the cooling effect of the ball mill bearings and gears.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a ball mill cooling system, comprising: an oil tank, a low-pressure output end of the oil tank is connected with a low-pressure oil pump, a low-pressure filter and a shell-and-tube heat exchanger in sequence, impurities in the lubricating oil are separated by the low-pressure filter, the lubricating oil is cooled by the shell-and-tube heat exchanger, and the lubricating oil passing through the shell-and-tube heat exchanger enters the low-pressure system pinion, and one side of the high-pressure output end of the oil tank is connected with a high-pressure oil pump, a valve assembly and a high-pressure filter in sequence, impurities in the lubricating oil are separated by the high-pressure filter, and the lubricating oil passing through the high-pressure filter enters the high-pressure system static pressure bearing;

[0007] The other side of the high-pressure output end of the oil tank is connected in sequence with a low-pressure oil pump and a shell-and-tube heat exchanger. The lubricating oil passing through the shell-and-tube heat exchanger returns to the low-pressure side of the oil tank, so that the lubricating oil in the oil tank is cooled.

[0008] Furthermore, the shell-and-tube heat exchanger includes a shell, a tube sheet, a heat transfer tube, an oil inlet pipe, an oil outlet pipe, a water inlet pipe, a water outlet pipe, a motor and a rotating shaft. Tube sheets are sealed and rotatably installed on both sides of the shell inner cavity. The cavity between the two tube sheets in the shell inner cavity is a cooling cavity. The cavities on both sides of the cooling cavity in the shell inner cavity are oil cavities. A heat transfer tube is axially arranged in the cooling cavity. The ends of the heat transfer tube are fixedly connected to the corresponding tube sheets. The two oil cavities are connected through the heat transfer tube. An oil inlet pipe is fixedly installed above the shell and at a position corresponding to the right oil cavity. The lower end of the oil inlet pipe is connected to the right oil cavity. An oil outlet pipe is fixedly installed below the shell and corresponds to the position of the left oil chamber, and the upper end of the oil outlet pipe is communicated with the left oil chamber. A water inlet pipe is fixedly installed above the shell and corresponds to the right side of the cooling chamber, and the lower end of the water inlet pipe is communicated with the cooling chamber. A water outlet pipe is fixedly installed below the shell and corresponds to the left side of the cooling chamber, and the upper end of the water outlet pipe is communicated with the cooling chamber. A motor is fixedly installed on one side of the shell, and a rotating shaft is fixedly installed on the output end of the motor. The other end of the rotating shaft extends into the shell and is fixedly connected to the center position of the corresponding tube plate, and the part of the rotating shaft passing through the shell is sealed and rotated with the shell.

[0009] Furthermore, the shell-and-tube heat exchanger also includes a lower baffle and an upper baffle, the lower baffle is equidistantly arranged axially at the lower position in the cooling chamber, there is a gap between the upper side of the lower baffle and the inner wall of the shell, the arcuate side of the lower baffle forms a sliding contact with the inner wall of the shell, the upper baffle is equidistantly arranged axially at the upper position in the cooling chamber, there is a gap between the lower side of the upper baffle and the inner wall of the shell, the arcuate side of the upper baffle forms a sliding contact with the inner wall of the shell, the upper baffle and the lower baffle are arranged in an alternating manner, the lower part of the upper baffle and the upper part of the lower baffle are overlapped, and the heat transfer tube passes through the upper baffle, the lower baffle and the tube sheet.

[0010] Furthermore, the shell-and-tube heat exchanger also includes a No. 1 slide hole and a telescopic cylinder. A No. 1 slide hole is axially penetrated at the center position of the tube plate away from the motor. A telescopic cylinder is rotatably installed on the other side of the shell. The output rod of the telescopic cylinder passes through the shell and the No. 1 slide hole, and is connected to the lower baffle plate and the upper baffle plate. The part of the output rod that passes through the shell forms a sealed sliding contact with the shell.

[0011] Furthermore, the output rod of the telescopic cylinder is fixedly connected to the lower baffle plate and the upper baffle plate.

[0012] Furthermore, a No. 1 sliding hole is axially penetrated through the interior of the lower baffle plate and the center position of the tube plate away from the motor, the lower baffle plate is fixedly connected to the heat transfer tube, the upper baffle plate is slidably connected to the heat transfer tube, the output rod of the telescopic cylinder passes through the shell and the No. 1 sliding hole, and is fixedly connected to the upper baffle plate, and when the output rod drives the upper baffle plate to move left and right to the extreme position, there is still a distance between the upper baffle plate and the lower baffle plate.

[0013] Furthermore, the shell-and-tube heat exchanger also includes a No. 2 slide hole, an upper magnet and a lower magnet. The interior of the first upper baffle plate on the left is provided with a No. 2 slide hole, the output rod forms a sliding connection with the No. 2 slide hole, the interior of the first upper baffle plate on the left is fixedly provided with an upper magnet, and the interior of the second lower baffle plate on the left is fixedly provided with a lower magnet corresponding to the position of the upper magnet, and the upper magnet and the lower magnet are arranged to attract each other with opposite poles.

[0014] Furthermore, the shell-and-tube heat exchanger further comprises a retaining ring, which is fixedly mounted on the outer side of the output rod and located on the left side of the second slide hole, and the diameter of the retaining ring is greater than the diameter of the second slide hole.

[0015] This application has the following beneficial effects:

[0016] The present application provides a ball mill cooling system, which adds a new low-pressure oil pump and a shell-and-tube heat exchanger on one side of the oil tank through the arrangement of a low-pressure oil pump and a shell-and-tube heat exchanger, so that the lubricating oil in the oil tank is directly pumped out from the high-pressure side of the oil tank by the low-pressure oil pump and enters the corresponding shell-and-tube heat exchanger, and then the cooled lubricating oil returns to the low-pressure side of the oil tank. Through the above action, the lubricating oil in the oil tank has a lower temperature, thereby improving the cooling effect of the lubricating oil on the bearings and gears of the ball mill.

[0017] Through the arrangement of the tube sheet, the heat transfer tube, the rotating shaft and the motor, when the lubricating oil is cooled by the shell-and-tube heat exchanger, the motor drives the tube sheet and the heat transfer tube to rotate through the rotating shaft, so that the upper and lower heat transfer tubes can be fully immersed in the cooling water, thereby improving the cooling effect of the lubricating oil in the heat transfer tube, and reducing the probability that the heat transfer tube at the upper position cannot be fully immersed in the cooling water due to a certain distance between the cooling water and the upper part of the inner wall of the shell.

[0018] Through the arrangement of the telescopic cylinder, the output rod, the upper baffle and the lower baffle, in the process of the lubricating oil being cooled by the shell-and-tube heat exchanger, the telescopic cylinder drives the output rod to reciprocate and reciprocate, so that the upper baffle moves back and forth, while the lower baffle is fixed. In this process, the upper baffle moves the cooling water in the shell-and-tube heat exchanger, causing the cooling water level to fluctuate. Through this action, the contact area between part of the cooling water and the heat transfer tube at the upper position is increased, thereby improving the cooling effect of the lubricating oil in the heat transfer tube.

[0019] By setting the upper baffle and the lower baffle, when the upper baffle moves back and forth left and right while the lower baffle is fixed, the upper baffle will be close to the lower baffle on one side, so that the cross-sectional area of ​​the channel opening surrounded by the two will be reduced. Through this action, the cooling water level at some positions in the shell will rise, thereby increasing the contact area between this part of the cooling water and the heat transfer tube at the upper position, further improving the cooling effect of the lubricating oil in the heat transfer tube. At the same time, the flow rate of the cooling water passing through the channel opening with the reduced cross-sectional area will be accelerated, so that the heat transferred by the lubricating oil in the heat transfer tube through convection per unit time will increase, thereby improving the cooling effect of the lubricating oil in the heat transfer tube.

[0020] By setting the upper baffle and the lower baffle, in the process of reducing the cross-sectional area of ​​the channel opening surrounded by the upper baffle and the lower baffle, part of the cooling water is directed upward when passing through the channel opening. Since the flow velocity of this part of the cooling water is accelerated at this time, the upward movement path of the part of the cooling water is extended, so that the contact area between this part of the cooling water and the heat transfer tube at the upper position is increased, and the cooling effect of the lubricating oil in the heat transfer tube is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which constitute a part of the specification, illustrate the embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0022] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0023] Figure 1 This is a flowchart of the structure operation in Embodiment 1 of the present invention;

[0024] Figure 2 This is a schematic diagram of the overall structure of the second embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the internal structure of the housing in the second embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the connection state between the telescopic cylinder and the tube sheet in the second embodiment of the present invention;

[0027] Figure 5 Schematic diagram of the tube sheet, upper baffle and lower baffle in the second embodiment of the present invention;

[0028] Figure 6 Schematic diagram of the internal structure of the upper baffle and the lower baffle in Embodiment 3 of the present invention.

[0029] In the figure: 1. shell; 2. tube sheet; 3. lower baffle; 4. upper baffle; 5. heat transfer tube; 6. oil inlet pipe; 7. oil outlet pipe; 8. water inlet pipe; 9. water outlet pipe; 10. motor; 11. rotating shaft; 12. No. 1 sliding hole; 13. telescopic cylinder; 14. No. 2 sliding hole; 15. retaining ring; 16. upper magnet; 17. lower magnet. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] Example 1: Please refer to Figure 1 A ball mill cooling system comprises an oil tank, a low-pressure output end of the oil tank is connected in sequence with a low-pressure oil pump, a low-pressure filter and a shell-and-tube heat exchanger, one side of the high-pressure output end of the oil tank is connected in sequence with a high-pressure oil pump, a valve assembly and a high-pressure filter, and the other side of the high-pressure output end of the oil tank is connected in sequence with a low-pressure oil pump and a shell-and-tube heat exchanger.

[0032] When in use, the lubricating oil on the high-pressure side of the oil tank is extracted by the corresponding low-pressure oil pump and transported to the shell-and-tube heat exchanger for cooling. Afterwards, the cooled lubricating oil returns to the low-pressure side of the oil tank. Through the above actions, the lubricating oil in the oil tank has a lower temperature, thereby improving the cooling effect of the lubricating oil on the ball mill bearings and gears. At the same time, the low-pressure oil pump extracts the lubricating oil in the oil tank from the low-pressure side of the oil tank and transports it to the low-pressure filter, so that the impurities in the lubricating oil are separated. Afterwards, the filtered lubricating oil enters the shell-and-tube heat exchanger, so that the lubricating oil is further cooled. Then, the cooled lubricating oil enters the low-pressure system pinion to be conditioned. Lubrication and cooling. Finally, the lubricating oil separated from the pinion of the low-pressure system returns to the low-pressure side of the oil tank, and the above operation is repeated. In the process of the low-pressure oil pump pumping the lubricating oil, the high-pressure oil pump extracts the lubricating oil in the oil tank from the high-pressure side of the oil tank, and transports it to the high-pressure filter through the valve assembly, so that the impurities in the lubricating oil are separated. After that, the filtered lubricating oil enters the static pressure bearing of the high-pressure system for lubrication and cooling. Finally, the lubricating oil separated from the static pressure bearing of the high-pressure system returns to the low-pressure side of the oil tank, and the above operation is repeated. Through the above actions, the lubrication and cooling operations of the ball mill bearings and gears are realized.

[0033] Example 2: Please refer to Figure 2-Figure 5This embodiment is a further improvement of the first embodiment, and the improvement is that: the shell and tube heat exchanger includes a shell 1, a tube sheet 2, a lower baffle 3, an upper baffle 4, a heat transfer tube 5, an oil inlet pipe 6, an oil outlet pipe 7, a water inlet pipe 8, a water outlet pipe 9, a motor 10 and a rotating shaft 11, both sides of the inner cavity of the shell 1 are sealed and rotatably mounted with tube sheets 2, the cavity between the two tube sheets 2 in the inner cavity of the shell 1 is a cooling cavity, the cavities on both sides of the cooling cavity in the inner cavity of the shell 1 are oil cavities, and the lower position in the cooling cavity is equidistantly arranged axially There is a lower baffle 3, the upper side of the lower baffle 3 is spaced from the inner wall of the shell 1, the arc side of the lower baffle 3 forms a sliding contact with the inner wall of the shell 1, an upper baffle 4 is equidistantly arranged axially at the upper position in the cooling chamber, the lower side of the upper baffle 4 is spaced from the inner wall of the shell 1, the arc side of the upper baffle 4 forms a sliding contact with the inner wall of the shell 1, the upper baffle 4 and the lower baffle 3 are arranged in a staggered manner, the lower part of the upper baffle 4 and the upper part of the lower baffle 3 are overlapped, and a heat transfer pipe 5 is axially arranged in the cooling chamber. The heat transfer tube 5 passes through the upper baffle plate 4, the lower baffle plate 3 and the tube sheet 2, and the end of the heat transfer tube 5 is fixedly connected with the corresponding tube sheet 2. The opening of the heat transfer tube 5 is opened on the opposite sides of the two tube sheets 2. The two oil chambers are connected through the heat transfer tube 5. An oil inlet pipe 6 is fixedly installed above the shell 1 and corresponds to the right oil chamber. The lower end of the oil inlet pipe 6 is connected to the right oil chamber. An oil outlet pipe 7 is fixedly installed below the shell 1 and corresponds to the left oil chamber. The upper end of the oil outlet pipe 7 is connected to the left oil chamber. A water inlet pipe 8 is fixedly installed above and corresponding to the right side of the cooling chamber, and the lower end of the water inlet pipe 8 is communicated with the cooling chamber. A water outlet pipe 9 is fixedly installed below the shell 1 and corresponding to the left side of the cooling chamber, and the upper end of the water outlet pipe 9 is communicated with the cooling chamber. A motor 10 is fixedly installed on one side of the shell 1, and a rotating shaft 11 is fixedly installed on the output end of the motor 10. The other end of the rotating shaft 11 extends into the shell 1 and is fixedly connected to the center position of the corresponding tube sheet 2. The part of the rotating shaft 11 passing through the shell 1 forms a sealed rotating connection with the shell 1.

[0034] When in use, the lubricating oil flows through the oil inlet pipe 6, the right oil chamber, the heat transfer pipe 5, the left oil chamber and the oil outlet pipe 7, and then flows back to the low-pressure side of the oil tank, while the cooling water flows through the water inlet pipe 8, the channel composed of the upper baffle 4 and the lower baffle 3 in the cooling chamber, and the water outlet pipe 9. Through the above actions, the heat of the lubricating oil is transferred to the cooling water through the heat transfer pipe 5, so that the lubricating oil is cooled. In the above process, the motor 10 is operated synchronously, so that the motor 10 drives the tube plate 2, the lower baffle 3, the upper baffle 4 and the heat transfer pipe 5 to rotate through the rotating shaft 11, so that the upper and lower heat transfer pipes 5 can be fully immersed in the cooling water, thereby improving the cooling effect of the lubricating oil in the heat transfer pipe 5, and reducing the probability that the heat transfer pipe 5 in the upper position cannot be fully immersed in the cooling water due to a certain distance between the cooling water liquid level and the upper part of the inner wall of the shell 1.

[0035] See also Figure 2-Figure 5 The shell-and-tube heat exchanger also includes a No. 1 slide hole 12 and a telescopic cylinder 13. The interior of the lower baffle plate 3 and the center position of the tube plate 2 far away from the motor 10 are axially penetrated with a No. 1 slide hole 12. The lower baffle plate 3 is fixedly connected to the heat transfer tube 5, and the upper baffle plate 4 is slidably connected to the heat transfer tube 5. The telescopic cylinder 13 is rotatably installed on the other side of the shell 1. The output rod of the telescopic cylinder 13 passes through the shell 1 and the No. 1 slide hole 12, and is fixedly connected to the upper baffle plate 4. The part of the output rod passing through the shell 1 forms a sealed sliding contact with the shell 1. When the output rod drives the upper baffle plate 4 to move left and right to the limit position, there is still a distance between the upper baffle plate 4 and the lower baffle plate 3.

[0036] In the process of the motor 10 driving the tube sheet 2, the lower baffle 3, the upper baffle 4 and the heat transfer tube 5 to rotate, the telescopic cylinder 13 drives the upper baffle 4 to move back and forth left and right through the output rod, while the lower baffle 3 is fixed relative to the upper baffle 4. In this process, the upper baffle 4 moves the cooling water in the cooling chamber, causing the cooling water level to fluctuate. Through this action, the contact area between part of the cooling water and the heat transfer tube 5 at the upper position is increased, thereby improving the cooling effect of the lubricating oil in the heat transfer tube 5. At the same time, since the upper baffle 4 will move closer to the lower baffle 3 on one side during the left and right movement, the cross-sectional area of ​​the channel opening surrounded by the two is reduced. Through this action, the cooling water level at some positions in the shell 1 will rise (the part closest to the water inlet pipe 8), thereby increasing The contact area between this part of cooling water and the heat transfer tube 5 at the upper position further improves the cooling effect of the lubricating oil in the heat transfer tube 5. In addition, the flow rate of the cooling water passing through the channel opening with the reduced cross-sectional area will be accelerated, so that the heat transferred by convection of the lubricating oil in the heat transfer tube 5 (the heat transfer tube 5 in contact with the cooling water with the accelerated flow rate) per unit time increases, thereby improving the cooling effect of the lubricating oil in the heat transfer tube 5. In the process of reducing the cross-sectional area of ​​the channel opening surrounded by the upper baffle 4 and the lower baffle 3, when part of the cooling water passes through the channel opening, it is directed upward. Since the flow rate of this part of the cooling water is accelerated at this time, the upward movement path of the part of the cooling water is extended, so that the contact area between this part of the cooling water and the heat transfer tube 5 at the upper position is increased, and the cooling effect of the lubricating oil in the heat transfer tube 5 is further improved.

[0037] Example 3: Please refer to Figure 2-Figure 6This embodiment is a further improvement of the second embodiment, and the improvement lies in that: the shell-and-tube heat exchanger further comprises a No. 2 slide hole 14, a retaining ring 15, an upper magnet 16 and a lower magnet 17; a No. 2 slide hole 14 is provided inside the first upper baffle plate 4 on the left; the output rod is slidably connected with the No. 2 slide hole 14; a retaining ring 15 is fixedly installed on the outer side of the output rod and at a position on the left side of the No. 2 slide hole 14; the diameter of the retaining ring 15 is greater than the diameter of the No. 2 slide hole 14; an upper magnet 16 is fixedly installed inside the first upper baffle plate 4 on the left; a lower magnet 17 is fixedly installed inside the second lower baffle plate 3 on the left and at a position corresponding to the upper magnet 16; the upper magnet 16 and the lower magnet 17 are arranged to attract each other with opposite poles.

[0038] In the process of cooling water entering the cooling chamber through the water inlet pipe 8, due to the attraction between the upper magnet 16 and the lower magnet 17, the first upper baffle plate 4 on the left and the second lower baffle plate 3 on the left are in contact with each other, resulting in the closure of the channel opening formed by the two. Afterwards, when the cavity in the cooling chamber at the side of the channel opening facing the water inlet pipe 8 is full of cooling water (or nearly full), the cooling water that subsequently enters will overcome the magnetic attraction between the upper magnet 16 and the lower magnet 17, and push open the first upper baffle plate 4 on the left, so that the cooling water passes through the channel opening and flows to the subsequent position. At this time, the cooling water in the cooling chamber is The cooling water level in the cavity at the side of the channel opening toward the water inlet pipe 8 will drop again. Then, as the output rod of the telescopic cylinder 13 reciprocates and extends, the output rod will drive the first upper baffle 4 on the left to approach the second lower baffle 3 on the left again through the retaining ring 15, so that the channel opening formed by the two is closed again. By repeating the above actions, the cooling water in the cavity at the side of the channel opening toward the water inlet pipe 8 in the cooling cavity will be intermittently filled, resulting in an increase in the contact area between this part of the cooling water and the heat transfer tube 5 at the upper position, further improving the cooling effect of the lubricating oil in the heat transfer tube 5.

Claims

1. A ball mill cooling system, comprising: An oil tank, wherein a low-pressure output end of the oil tank is sequentially connected with a low-pressure oil pump, a low-pressure filter and a shell-and-tube heat exchanger, impurities in the lubricating oil are separated by the low-pressure filter, the lubricating oil is cooled by the shell-and-tube heat exchanger, and the lubricating oil passing through the shell-and-tube heat exchanger enters the pinion of the low-pressure system, and one side of the high-pressure output end of the oil tank is sequentially connected with a high-pressure oil pump, a valve assembly and a high-pressure filter, impurities in the lubricating oil are separated by the high-pressure filter, and the lubricating oil passing through the high-pressure filter enters the static pressure bearing of the high-pressure system; It is characterized in that the other side of the high-pressure output end of the oil tank is connected in sequence with a low-pressure oil pump and a shell-and-tube heat exchanger, and the lubricating oil passing through the shell-and-tube heat exchanger returns to the low-pressure side of the oil tank, so that the lubricating oil in the oil tank is cooled; The shell-and-tube heat exchanger comprises a shell (1), a tube sheet (2), a heat transfer tube (5), an oil inlet tube (6), an oil outlet tube (7), a water inlet tube (8), a water outlet tube (9), a motor (10) and a rotating shaft (11). Tube sheets (2) are sealed and rotatably mounted on both sides of the inner cavity of the shell (1). The cavity between the two tube sheets (2) in the inner cavity of the shell (1) is a cooling cavity. The cavities on both sides of the cooling cavity in the inner cavity of the shell (1) are oil cavities. A heat transfer tube (5) is axially arranged in the cooling cavity. The end of the heat transfer tube (5) is fixedly connected to the corresponding tube sheet (2). The two oil cavities are connected to each other through the heat transfer tube (5). An oil inlet tube (6) is fixedly mounted above the shell (1) and at a position corresponding to the right oil cavity. The lower end of the oil inlet tube (6) is connected to the right oil cavity. An oil outlet pipe (7) is fixedly installed below the shell (1) and at a position corresponding to the left oil chamber, and the upper end of the oil outlet pipe (7) is communicated with the left oil chamber. A water inlet pipe (8) is fixedly installed above the shell (1) and at a position corresponding to the right side of the cooling chamber, and the lower end of the water inlet pipe (8) is communicated with the cooling chamber. A water outlet pipe (9) is fixedly installed below the shell (1) and at a position corresponding to the left side of the cooling chamber, and the upper end of the water outlet pipe (9) is communicated with the cooling chamber. A motor (10) is fixedly installed on one side of the shell (1), and a rotating shaft (11) is fixedly installed at the output end of the motor (10), and the other end of the rotating shaft (11) extends into the shell (1) and is fixedly connected to the center position of the corresponding tube sheet (2), and the part of the rotating shaft (11) that passes through the shell (1) is sealed and rotatably connected with the shell (1). The shell-and-tube heat exchanger further comprises a lower baffle (3) and an upper baffle (4); the lower baffle (3) is equidistantly arranged in the axial direction at the lower position in the cooling chamber; the upper side of the lower baffle (3) is spaced apart from the inner wall of the shell (1); the arcuate side of the lower baffle (3) is in sliding contact with the inner wall of the shell (1); the upper baffle (4) is equidistantly arranged in the axial direction at the upper position in the cooling chamber; the lower side of the upper baffle (4) is spaced apart from the inner wall of the shell (1); the arcuate side of the upper baffle (4) is in sliding contact with the inner wall of the shell (1); the upper baffle (4) and the lower baffle (3) are arranged in a staggered manner; the lower part of the upper baffle (4) and the upper part of the lower baffle (3) are arranged to overlap; the heat transfer tube (5) passes through the upper baffle (4), the lower baffle (3) and the tube sheet (2); The shell-and-tube heat exchanger further comprises a first sliding hole (12) and a telescopic cylinder (13); the first sliding hole (12) is axially penetrated at the center of the tube sheet (2) away from the motor (10); the telescopic cylinder (13) is rotatably mounted on the other side of the shell (1); the output rod of the telescopic cylinder (13) passes through the shell (1) and the first sliding hole (12) and is connected to the lower baffle (3) and the upper baffle (4); the portion of the output rod that passes through the shell (1) forms a sealed sliding contact with the shell (1); A first sliding hole (12) is axially penetrated through the interior of the lower baffle (3) and the center of the tube sheet (2) away from the motor (10); the lower baffle (3) is fixedly connected to the heat transfer tube (5); the upper baffle (4) is slidably connected to the heat transfer tube (5); the output rod of the telescopic cylinder (13) passes through the shell (1) and the first sliding hole (12) and is fixedly connected to the upper baffle (4); when the output rod drives the upper baffle (4) to move left and right to an extreme position, there is still a distance between the upper baffle (4) and the lower baffle (3); The shell-and-tube heat exchanger further comprises a second sliding hole (14), an upper magnet (16) and a lower magnet (17); the first upper baffle plate (4) on the left side is provided with a second sliding hole (14); the output rod and the second sliding hole (14) are slidably connected; the first upper baffle plate (4) on the left side is fixedly provided with an upper magnet (16); the second lower baffle plate (3) on the left side is fixedly provided with a position corresponding to the upper magnet (16); the upper magnet (16) and the lower magnet (17) are arranged to attract each other with opposite poles; The shell-and-tube heat exchanger further comprises a retaining ring (15), which is fixedly mounted on the outside of the output rod and located on the left side of the second slide hole (14), and the diameter of the retaining ring (15) is greater than the diameter of the second slide hole (14).

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