A cast aluminum piston water cooling device and cooling method thereof

Abstract

The invention relates to the technical field of cast aluminum pistons, and in particular to a water cooling device for a cast aluminum piston and a cooling method thereof, comprising a support leg, a water cooling barrel, an overflow port and a water inlet and outlet, wherein the outer side of the support leg is fixedly connected to the water cooling barrel, the inner side of the water cooling barrel is through-connected to the overflow port, the inner side of the water cooling barrel is through-connected to the water inlet and outlet, a control mechanism is arranged directly below the water cooling barrel, the control mechanism comprises a motor, a speed controller is electrically connected to the outer side of the motor, a transmission mechanism is fixedly connected to the end of the motor main shaft, the transmission mechanism comprises a rotating shaft, a sealed bearing is fixedly connected to the outer side of the rotating shaft, a threaded groove is provided on the inner side of the rotating shaft, a first telescopic spring is arranged on the inner side of the rotating shaft, and a transmission column is arranged on the inner side of the transmission mechanism. In the invention, a step-by-step mechanical operation is used to spin dry and output the water-cooled cast aluminum piston, thereby avoiding a large amount of water stains adhering to the surface of the water-cooled cast aluminum piston.

Description

Technical Field

[0001] The invention relates to the technical field of cast aluminum pistons, in particular to a cast aluminum piston water cooling device and a cooling method thereof. Background Art

[0002] The water cooling device of cast aluminum piston is a technical device used to cool the cast aluminum piston of internal combustion engine. It uses water or coolant to flow on the piston to take away the heat carried inside the piston. It is a device to improve the internal structure stability and long-term service life of the piston after molding.

[0003] After the cast aluminum piston is formed into a piston blank by using a mold, there is still a lot of heat inside the cast aluminum piston, and the internal structure of the cast aluminum piston is unstable at this time, and it is very easy to be deformed by external forces. Therefore, the cast aluminum piston needs to be placed in cooling water or coolant to allow heat exchange between the cast aluminum piston and the cooling water or coolant;

[0004] In the cooling process of the existing cast aluminum piston, the cast aluminum piston is directly placed in cooling water, so that the cast aluminum piston can have a relatively comprehensive and sufficient heat exchange with the cooling water, thereby achieving the stability of the internal structure of the cast aluminum piston. However, when the cast aluminum piston is taken out after water cooling, part of the cooling water is easy to adhere to the surface of the cast aluminum piston and its depressions, thereby affecting the overall appearance of the cast aluminum piston after water cooling. Therefore, in view of the above problems, a cast aluminum piston water cooling device and a cooling method thereof are proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a water cooling device and a cooling method for a cast aluminum piston, so as to solve the problem that when the cast aluminum piston is taken out after water cooling, part of the cooling water is easily attached to the surface and the depression of the cast aluminum piston, thereby affecting the overall appearance neatness of the cast aluminum piston after water cooling.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A cast aluminum piston water cooling device and a cooling method thereof, comprising a support leg, a water cooling bucket, an overflow port and a water inlet and outlet, wherein the outer side of the support leg is fixedly connected to the water cooling bucket, the inner side of the water cooling bucket is connected to the overflow port, the inner side of the water cooling bucket is connected to the water inlet and outlet, a control mechanism is arranged directly below the water cooling bucket, the control mechanism comprises a motor, a speed controller is electrically connected to the outer side of the motor, a transmission mechanism is fixedly connected to the end of the motor main shaft, the transmission mechanism comprises a rotating shaft, a sealed bearing is fixedly connected to the outer side of the rotating shaft, a threaded groove is provided on the inner side of the rotating shaft, a first telescopic spring is arranged on the inner side of the rotating shaft, and a transmission column is arranged on the inner side of the transmission mechanism;

[0008] One end of the transmission column is fixedly connected to a fixed block, the outer side of the fixed block is fixedly connected to a spiral strip, the other end of the transmission column is fixedly connected to a supporting platform mechanism, the supporting platform mechanism includes a supporting platform plate, the inner side of the supporting platform plate is provided with a notch, the outer side of the supporting platform plate is fixedly connected to a fixed rod, the outer side of the supporting platform plate is fixedly connected to a second telescopic spring, the end of the second telescopic spring is fixedly connected to a circular plate, the outer side of the circular plate is fixedly connected to a sliding rod, a limiting mechanism is arranged on the inner side of the water cooling barrel, the limiting mechanism includes a fixed shaft and a limiting plate, the outer side of the fixed shaft is rotatably connected to the limiting plate, and the outer side of the limiting plate is fixedly connected to a weight block.

[0009] As a further optimization of the present invention, a slot hole for accommodating a limiting mechanism is opened on the inner side of the water cooling barrel, the fixed shaft is fixedly connected to the slot hole opened in the water cooling barrel, and the fixed shaft is symmetrically arranged on the inner side of the water cooling barrel.

[0010] As further optimized content of the present invention, the limit plate can rotate up to 90° with the axis of the fixed shaft as the center of the circle, the limit plate can be perpendicular or parallel to the base plate in the water cooling barrel, the thickness of the limit plate is much smaller than the minimum depth of the slot hole opened in the water cooling barrel, and the fixed shaft is set at the depth of the slot hole in the water cooling barrel.

[0011] As a further optimization of the present invention, a plurality of holes are evenly opened on the inner side of the base plate, the sliding rod slides in the holes opened on the inner side of the base plate, and the diameter of the sliding rod decreases step by step with the distance from the sliding rod to the center of the base plate.

[0012] As a further optimization of the present invention, there are two notches in total, the notches are symmetrically arranged on the inner side of the base plate, and the width of the notches is much larger than the width of the limiting plate.

[0013] As a further optimization of the present invention, the overflow port is arranged directly below the fixed shaft, the water inlet and outlet are arranged between the overflow port and the sealing bearing, and the sealing bearing is fixedly connected to the water cooling barrel.

[0014] As a further optimization of the present invention, a plurality of fixing rods are evenly arranged on the side of the base plate away from the motor, and the fixing rods are symmetrically arranged on both sides of the two notches with the center line of the two notches as the center line, and the diameter of the fixing rods is much larger than the maximum sliding rod diameter.

[0015] As a further optimization of the present invention, the fixed block slides on the inner side of the rotating shaft, two spiral strips are arranged on the outer side of the fixed block, the spiral strips are rotated 180° with the axis of the fixed block as the center, and the spiral strips slide on the inner side of the thread groove.

[0016] As a further optimization of the present invention, the length of the rotating shaft protruding from the bottom of the water-cooling barrel is much greater than the length of the sliding rod plus the thickness of the circular plate, the circular plates are of the same size, and the circular plates are all arranged on the same side of the base plate.

[0017] As further optimized content of the present invention, wherein:

[0018] S1: Placement of the cast aluminum piston: first, continuously input cold water into the water cooling barrel through the water inlet and outlet until the cold water in the water cooling barrel reaches the position of the overflow port, reducing the rate of cold water input, and then part of the water flows out slowly from the overflow port. At this time, the cast aluminum piston with a certain amount of heat is placed on the base plate in the water cooling barrel. The cast aluminum piston exerts pressure on the base plate under the horizontal plane of the fixed shaft in a natural state through its own weight, so that the base plate can generate thrust on the fixed block through the transmission column, so that the fixed block drives the spiral strip fixedly connected to its outer side to slide in the thread groove opened on the inner side of the rotating shaft, and at the same time, the fixed block exerts a compressive force on the first telescopic spring in the rotating shaft. When the cast aluminum piston is placed on the base plate, the cast aluminum piston exerts a thrust on the sliding rod on the inner side of the base plate, so that the sliding rod exerts a tensile force on the second telescopic spring through the circular plate fixedly connected to it, so that the sliding rod on the upper side of the base plate forms a concave shape, which restricts the cast aluminum piston more stably.

[0019] S2: Cooling of cast aluminum piston: After the cast aluminum piston is stably placed on the base plate, an external power supply is used to energize the motor and the speed controller. The motor is controlled by the speed controller to run slowly first, and then the motor controls the rotating shaft to which its main shaft is fixed to rotate in the water cooling barrel. During the slow rotation of the rotating shaft, the centrifugal force of the rotating shaft is insufficient to control the fixed block to rotate upward on the inner side of the rotating shaft through the thread groove and the spiral strip. In this way, the cast aluminum piston on the base plate is always in the cold water below the horizontal plane of the overflow port. The rotating shaft can drive the base plate and the cast aluminum piston above it to rotate slowly in the cold water in the water cooling barrel, thereby cooling the cast aluminum piston. At the same time, the sliding rod and the circular plate under the base plate can stir the cold water in the water cooling barrel, accelerate the mixing of the cold water in the water cooling barrel, and enhance the water cooling rate of the cast aluminum piston.

[0020] S3: Removal of cast aluminum piston: After a period of water cooling treatment, the cast aluminum piston in the water-cooling barrel is controlled by the speed controller to speed up the motor. At this time, the motor drives the rotating shaft to rotate faster, so that the centrifugal force of the rotating shaft can overcome the pressure of the cast aluminum piston on the spiral strip through the base plate, the transmission column and the fixed block, so that the spiral strip can passively slide in the thread groove until the fixed block is tightly attached to the upper end of the rotating shaft without further movement. In this process, the base plate pushes the limit plate, so that the limit plate is hidden in the slot of the water-cooling barrel for a short time with the fixed shaft axis as the center. When the base plate moves to a position higher than the hidden position of the limit plate, the limit plate is restored under the gravity of the weight block, and the water in the water-cooling barrel The cast aluminum piston rotating at high speed on the plane can shake off the water stains on its surface, and then stop the motor. The cast aluminum piston on the base plate loses the rotational centrifugal force of the transmission column and can push the fixed block to slide in the rotating shaft again by its own gravity until the base plate is restricted by the limit plate. Then the user can remove the cooled cast aluminum piston from the base plate. At this time, the slide rod is restored under the contraction force of the second telescopic spring, and finally the base plate is rotated. The base plate drives the rotor on the inside of the motor to rotate slightly through the transmission column and the rotating shaft, so that the notch is aligned with the position of the limit plate, and the base plate is pressed through the fixed rod to move the base plate to the bottom of the limit plate, so that other cast aluminum pistons can be water-cooled later.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the present invention, by setting the speed controller and the motor, the speed controller can control the motor to rotate slowly, and the slow rotation of the motor allows the cast aluminum piston on the base plate to be completely immersed in the cold water in the water-cooling barrel to perform heat exchange;

[0023] 2. In the present invention, by providing the rotating shaft, the threaded groove, the transmission column, the fixed block and the spiral strip, the rotating shaft can control the position of one end of the transmission column connected to the base plate under different motor speed conditions, so as to perform water cooling treatment on the cast aluminum piston on the base plate or remove it after water cooling, and at the same time, avoid part of the cooling water from adhering to the surface of the cast aluminum piston after water cooling and its depression to ensure the overall appearance of the cast aluminum piston after water cooling.

[0024] 3. In the present invention, by providing a base plate, a notch, a fixed rod, a second telescopic spring, a circular plate and a sliding rod, after the cast aluminum piston is placed on the base plate, a plurality of sliding rods that can slide can be moved according to the size of the cast aluminum piston so as to position and limit the cast aluminum piston, thereby preventing the cast aluminum piston from being displaced during the drying process after water cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the internal structure of the water cooling barrel of the present invention;

[0027] Figure 3 For the present invention Figure 2 Schematic diagram of the structure at A in the middle;

[0028] Figure 4 For the present invention Figure 2 Schematic diagram of the structure at B in the middle;

[0029] Figure 5 It is a schematic diagram of the sliding rod structure of the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of the cap plate of the present invention;

[0031] Figure 7 This is a schematic diagram of the internal structure of the rotating shaft of the present invention;

[0032] Figure 8 Schematic diagram of the spiral strip structure of the present invention.

[0033] In the figure: 1. Legs; 2. Water cooling bucket; 3. Overflow port; 4. Water inlet and outlet;

[0034] 5. Control mechanism; 51. Motor; 52. Speed ​​controller;

[0035] 6. Transmission mechanism; 61. Rotating shaft; 62. Sealed bearing; 63. Threaded groove; 64. First telescopic spring;

[0036] 611, transmission column; 612, fixing block; 613, spiral strip;

[0037] 7. Supporting platform mechanism; 71. Supporting platform plate; 72. Notch; 73. Fixed rod; 74. Second telescopic spring; 75. Round plate; 76. Sliding rod.

[0038] 8. Limiting mechanism; 81. Fixed shaft; 82. Limiting plate; 83. Weight block. DETAILED DESCRIPTION

[0039] See also Figure 1-8 , the present invention provides a technical solution:

[0040] A cast aluminum piston water cooling device and a cooling method thereof, comprising a support leg 1, a water cooling barrel 2, an overflow port 3 and a water inlet and outlet 4, the support leg 1 is fixedly connected to the water cooling barrel 2 on the outside, the water cooling barrel 2 is connected to the overflow port 3 on the inside, the water cooling barrel 2 is connected to the water inlet and outlet 4 on the inside, a control mechanism 5 is arranged directly below the water cooling barrel 2, the control mechanism 5 comprises a motor 51, a speed controller 52 is electrically connected to the outside of the motor 51, a transmission mechanism 6 is fixedly connected to the end of the main shaft of the motor 51, the transmission mechanism 6 comprises a rotating shaft 61, a sealed bearing 62 is fixedly connected to the outside of the rotating shaft 61, a threaded groove 63 is provided on the inside of the rotating shaft 61, a first telescopic spring 64 is arranged on the inside of the rotating shaft 61, and a transmission column 611 is arranged on the inside of the transmission mechanism 6;

[0041] One end of the transmission column 611 is fixedly connected to a fixed block 612, and the outer side of the fixed block 612 is fixedly connected to a spiral strip 613, and the other end of the transmission column 611 is fixedly connected to a support mechanism 7, and the support mechanism 7 includes a support plate 71, and a notch 72 is opened on the inner side of the support plate 71, and a fixing rod 73 is fixedly connected to the outer side of the support plate 71, and a second telescopic spring 74 is fixedly connected to the outer side of the support plate 71, and a circular plate 75 is fixedly connected to the end of the second telescopic spring 74, and a sliding rod 76 is fixedly connected to the outer side of the circular plate 75. A limiting mechanism 8 is arranged on the inner side of the water cooling barrel 2, and the limiting mechanism 8 includes a fixed shaft 81 and a limiting plate 82, and the outer side of the fixed shaft 81 is rotatably connected to the limiting plate 82, and the outer side of the limiting plate 82 is fixedly connected to a weight block 83.

[0042] As a further technical solution for implementing this scheme, a slot hole for accommodating the limit mechanism 8 is opened on the inner side of the water cooling barrel 2, and the fixed shaft 81 is fixedly connected to the slot hole opened in the water cooling barrel 2. The fixed shaft 81 is symmetrically arranged on the inner side of the water cooling barrel 2, so that the support plate 71 can smoothly pass through the position of the limit plate 82 during the upward movement. At the same time, the limit plate 82 can support the support plate 71 moved above it;

[0043] As a technical solution for further implementation of this solution, the limit plate 82 can rotate up to 90° with the axis of the fixed shaft 81 as the center of the circle. The limit plate 82 can be perpendicular or parallel to the support plate 71 in the water-cooling barrel 2. The thickness of the limit plate 82 is much smaller than the minimum depth of the slot hole opened in the water-cooling barrel 2. The fixed shaft 81 is set in the depth of the slot hole of the water-cooling barrel 2, so that after the support plate 71 moves to the top of the limit plate 82, the limit plate 82 can be restored and rotated with the axis of the fixed shaft 81 as the center of the circle.

[0044] As a technical solution for further implementation of this solution, a plurality of holes are evenly opened on the inner side of the support plate 71, and the slide rod 76 slides in the holes opened on the inner side of the support plate 71. The diameter of the slide rod 76 gradually decreases with the distance from the slide rod 76 to the center of the support plate 71, and the cast aluminum pistons of different sizes can be positioned and restricted to prevent them from being displaced significantly during the high-speed rotation of the support plate 71.

[0045] As a further technical solution for implementing the present invention, there are two notches 72, which are symmetrically arranged on the inner side of the base plate 71. The width of the notches 72 is much larger than the width of the limiting plate 82, so that the base plate 71 can be easily reset and moved to the bottom of the limiting plate 82.

[0046] As a further technical solution of this solution, the overflow port 3 is arranged directly below the fixed shaft 81, the water inlet and outlet 4 is arranged between the overflow port 3 and the sealing bearing 62, and the sealing bearing 62 is fixedly connected to the water cooling barrel 2, which can ensure that the cold water in the water cooling barrel 2 always maintains a certain constant amount;

[0047] As a technical solution for further implementation of this solution, a plurality of fixing rods 73 are evenly arranged on the side of the base plate 71 away from the motor 51. The fixing rods 73 are symmetrically arranged on both sides of the two notches 72 with the center line of the two notches 72 connected. The diameter of the fixing rods 73 is much larger than the diameter of the largest sliding rod 76, which can prevent the cast aluminum piston on the base plate 71 from colliding with the inner wall of the water cooling barrel 2.

[0048] As a further technical solution of the present invention, the fixed block 612 slides on the inner side of the rotating shaft 61, and two spiral strips 613 are arranged on the outer side of the fixed block 612. The spiral strips 613 rotate 180° with the axis of the fixed block 612 as the center of the circle, and the spiral strips 613 slide on the inner side of the thread groove 63, which can ensure that the fixed block 612 slides stably and vertically on the inner side of the rotating shaft 61;

[0049] As a technical solution for further implementation of this solution, the length of the rotating shaft 61 protruding from the bottom of the water-cooling barrel 2 is much greater than the length of the sliding rod 76 plus the thickness of the circular plate 75. The circular plates 75 are of the same size and are all arranged on the same side of the support plate 71, so that the sliding rod 76 protruding from the lower side of the support plate 71 rotates with the support plate 71 to stir the cold water in the water-cooling barrel 2, thereby accelerating the efficiency of the cold water continuously injected into the water-cooling barrel 2 and the cold water in the water-cooling barrel 2.

[0050] S1: Placement of cast aluminum piston: First, continuously input cold water into the water cooling barrel 2 through the water inlet and outlet 4 until the cold water in the water cooling barrel 2 reaches the position of the overflow port 3, reduce the rate of cold water input, and then part of the water flows out slowly from the overflow port 3. At this time, the cast aluminum piston with a certain amount of heat is placed on the support plate 71 in the water cooling barrel 2. The cast aluminum piston exerts pressure on the support plate 71 under the horizontal plane of the fixed shaft 81 in the natural state through its own weight, so that the support plate 71 can generate thrust on the fixed block 612 through the transmission column 611, so that the fixed The block 612 drives the spiral strip 613 fixedly connected to its outer side to slide in the thread groove 63 provided on the inner side of the rotating shaft 61. At the same time, the fixed block 612 exerts a compressive force on the first telescopic spring 64 in the rotating shaft 61. When the cast aluminum piston is placed on the bearing plate 71, the cast aluminum piston exerts a thrust on the slide bar 76 on the inner side of the bearing plate 71, so that the slide bar 76 exerts a tensile force on the second telescopic spring 74 through the circular plate 75 fixedly connected to it. In this way, the slide bar 76 on the upper side of the bearing plate 71 forms a concave shape, which restricts the cast aluminum piston more stably.

[0051] S2: Cooling of the cast aluminum piston: After the cast aluminum piston is stably placed on the base plate 71, an external power supply is used to energize the motor 51 and the speed controller 52. The motor 51 is controlled by the speed controller 52 to run slowly first, and then the motor 51 controls the rotating shaft 61 to which its main shaft is fixedly connected to rotate in the water-cooling barrel 2. During the slow rotation of the rotating shaft 61, the centrifugal force of the rotating shaft 61 is insufficient to control the fixed block 612 to rotate upward on the inner side of the rotating shaft 61 through the thread groove 63 and the spiral strip 613. In this way, the cast aluminum piston on the base plate 71 is always in the cold water below the horizontal plane of the overflow port 3. The rotating shaft 61 can drive the base plate 71 and the cast aluminum piston above it to rotate slowly in the cold water in the water-cooling barrel 2 to achieve cooling of the cast aluminum piston. At the same time, the sliding rod 76 and the circular plate 75 below the base plate 71 can stir the cold water in the water-cooling barrel 2, accelerate the mixing of the cold water in the water-cooling barrel 2, and enhance the water cooling rate of the cast aluminum piston.

[0052] S3: Removal of cast aluminum piston: After a period of water cooling treatment, the cast aluminum piston in the water-cooling barrel 2 is accelerated by controlling the speed controller 52 to control the working speed of the motor 51. At this time, the motor 51 drives the rotation speed of the rotating shaft 61 to accelerate, so that the centrifugal force of the rotation of the rotating shaft 61 can overcome the pressure of the cast aluminum piston on the spiral strip 613 through the support plate 71, the transmission column 611 and the fixed block 612, so that the spiral strip 613 can passively slide in the thread groove 63 until the fixed block 612 is tightly attached to the upper end of the rotating shaft 61 without further movement. In this process, the support plate 71 pushes the limit plate 82, so that the limit plate 82 is hidden in the slot of the water-cooling barrel 2 for a short time with the axis of the fixed shaft 81 as the center. When the support plate 71 moves to a position higher than the hidden position of the limit plate 82, the limit plate 82 is restored under the gravity of the weight block 83, and is in the water-cooling barrel 2. The cast aluminum piston rotating at high speed on the inner horizontal plane can shake off the water stains on its surface, thereby stopping the operation of the motor 51. The cast aluminum piston on the base plate 71 loses the rotational centrifugal force of the transmission column 611 and can push the fixed block 612 to slide in the rotating shaft 61 again through its own gravity until the base plate 71 is restricted by the limit plate 82. Then the user can remove the cooled cast aluminum piston from the base plate 71. At this time, the slide bar 76 is restored under the contraction force of the second telescopic spring 74, and finally the base plate 71 is rotated. The base plate 71 drives the rotor on the inner side of the motor 51 to rotate slightly through the transmission column 611 and the rotating shaft 61, so that the notch 72 is aligned with the position of the limit plate 82, and the base plate 71 is pressed through the fixing rod 73, so that the base plate 71 can be moved to the bottom of the limit plate 82, so that other cast aluminum pistons can be subsequently cooled by water.

[0053] This device effectively positions and limits the cast aluminum pistons that need to be water-cooled, and uses mechanical operation to evenly exchange heat in cold water. It also uses step-by-step mechanical operation to spin dry and output the water-cooled cast aluminum pistons, thus avoiding excessive water stains on the surface of the water-cooled cast aluminum pistons.

[0054] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A cast aluminum piston water cooling device, comprising a support leg (1), a water cooling bucket (2), an overflow port (3) and a water inlet and outlet (4), characterized in that: The outer side of the support leg (1) is fixedly connected to a water cooling barrel (2), the inner side of the water cooling barrel (2) is connected through an overflow port (3), the inner side of the water cooling barrel (2) is connected through an inlet and outlet port (4), a control mechanism (5) is arranged directly below the water cooling barrel (2), the control mechanism (5) comprises a motor (51), the outer side of the motor (51) is electrically connected to a speed controller (52), the end of the main shaft of the motor (51) is fixedly connected to a transmission mechanism (6), the transmission mechanism (6) comprises a rotating shaft (61), the outer side of the rotating shaft (61) is fixedly connected to a sealed bearing (62), the inner side of the rotating shaft (61) is provided with a threaded groove (63), the inner side of the rotating shaft (61) is provided with a first telescopic spring (64), and the inner side of the rotating shaft (61) is provided with a transmission column (611); One end of the transmission column (611) is fixedly connected to a fixed block (612), and the outer side of the fixed block (612) is fixedly connected to a spiral strip (613); the other end of the transmission column (611) is fixedly connected to a support mechanism (7); the support mechanism (7) comprises a support plate (71); a notch (72) is provided on the inner side of the support plate (71); a fixed rod (73) is fixedly connected to the outer side of the support plate (71); a second telescopic spring (74) is fixedly connected to the outer side of the support plate (71); a circular plate (75) is fixedly connected to the end of the second telescopic spring (74); a sliding rod (76) is fixedly connected to the outer side of the circular plate (75); a limiting mechanism (8) is arranged on the inner side of the water cooling barrel (2); the limiting mechanism (8) comprises a fixed shaft (81) and a limiting plate (82); the outer side of the fixed shaft (81) is rotatably connected to the limiting plate (82); and the outer side of the limiting plate (82) is fixedly connected to a weight block (83); A slot hole for accommodating a limiting mechanism (8) is provided on the inner side of the water cooling barrel (2), and the fixed shaft (81) is fixedly connected to the slot hole provided in the water cooling barrel (2). The fixed shaft (81) is symmetrically arranged on the inner side of the water cooling barrel (2); The limit plate (82) is rotatable by a maximum of 90° with the axis of the fixed shaft (81) as the center of the circle. The limit plate (82) can be perpendicular or parallel to the support plate (71) in the water cooling barrel (2). The thickness of the limit plate (82) is much smaller than the minimum depth of the slot hole opened in the water cooling barrel (2). The fixed shaft (81) is arranged at the depth of the slot hole in the water cooling barrel (2).

2. A water cooling device for a cast aluminum piston according to claim 1, characterized in that: A plurality of holes are evenly opened on the inner side of the support plate (71), and the sliding rod (76) slides in the holes opened on the inner side of the support plate (71). The diameter of the sliding rod (76) gradually decreases with the distance from the sliding rod to the center of the support plate (71).

3. The cast aluminum piston water cooling device according to claim 1, characterized in that: There are two notches (72) in total. The notches (72) are symmetrically arranged on the inner side of the base plate (71). The width of the notches (72) is much greater than the width of the limiting plate (82).

4. The cast aluminum piston water cooling device according to claim 1, characterized in that: The overflow port (3) is arranged directly below the fixed shaft (81), the water inlet and outlet (4) are arranged between the overflow port (3) and the sealing bearing (62), and the sealing bearing (62) is fixedly connected to the water cooling barrel (2).

5. The cast aluminum piston water cooling device according to claim 1, characterized in that: A plurality of fixing rods (73) are evenly arranged on one side of the support plate (71) away from the motor (51), and the fixing rods (73) are symmetrically arranged on both sides of the two notches (72) with respect to a central line connecting the two notches (72), and the diameter of the fixing rods (73) is much larger than the diameter of the largest sliding rod (76).

6. The cast aluminum piston water cooling device according to claim 1, characterized in that: The fixed block (612) slides on the inside of the rotating shaft (61), and two spiral strips (613) are arranged on the outside of the fixed block (612). The spiral strips (613) rotate 180 degrees with respect to the axis of the fixed block (612) as the center of the circle, and the spiral strips (613) slide on the inside of the thread groove (63).

7. The cast aluminum piston water cooling device according to claim 1, characterized in that: The length of the rotating shaft (61) protruding from the bottom of the water cooling barrel (2) is much greater than the length of the sliding rod (76) plus the thickness of the circular plate (75). The circular plates (75) are of the same size and are all arranged on the same side of the support plate (71).

8. A cooling method for a cast aluminum piston water cooling device according to any one of claims 1 to 7, characterized in that: S1: Placement of the cast aluminum piston: First, cold water is continuously input into the water cooling barrel (2) through the water inlet and outlet (4) until the cold water in the water cooling barrel (2) reaches the position of the overflow port (3), and the rate of cold water input is reduced, so that part of the water flows out slowly from the overflow port (3). At this time, the cast aluminum piston with a certain amount of heat is placed on the support plate (71) in the water cooling barrel (2). The cast aluminum piston exerts pressure on the support plate (71) under the horizontal plane of the fixed shaft (81) in the natural state through its own weight, so that the support plate (71) can generate thrust on the fixed block (612) through the transmission column (611), so that the fixed block (612) 12) driving the spiral strip (613) fixedly connected on the outside thereof to slide in the spiral groove (63) provided on the inner side of the rotating shaft (61), and at the same time, the fixed block (612) exerts a compressive force on the first telescopic spring (64) in the rotating shaft (61), and when the cast aluminum piston is placed on the support plate (71), the cast aluminum piston exerts a thrust on the slide bar (76) on the inner side of the support plate (71), so that the slide bar (76) exerts a tensile force on the second telescopic spring (74) through the circular plate (75) fixedly connected thereto, thereby forming a concave shape on the slide bar (76) on the upper side of the support plate (71), thereby constraining the cast aluminum piston in a relatively stable manner; S2: Cooling of the cast aluminum piston: After the cast aluminum piston is stably placed on the base plate (71), an external power source is used to energize the motor (51) and the speed controller (52). The speed controller (52) controls the motor (51) to run slowly first, and then the motor (51) controls the rotating shaft (61) to which its main shaft is fixedly connected to rotate in the water cooling barrel (2). During the slow rotation of the rotating shaft (61), the rotating centrifugal force of the rotating shaft (61) is insufficient to control the fixed block (612) to rotate through the thread groove (63) and the spiral strip (613). The inner side of the rotating shaft (61) rotates upward, so that the cast aluminum piston on the support plate (71) is always in the cold water below the horizontal plane of the overflow port (3). The rotating shaft (61) can drive the support plate (71) and the cast aluminum piston above it to rotate slowly in the cold water in the water cooling barrel (2), thereby cooling the cast aluminum piston. At the same time, the sliding rod (76) and the circular plate (75) below the support plate (71) can stir the cold water in the water cooling barrel (2), thereby accelerating the mixing of the cold water in the water cooling barrel (2) and enhancing the water cooling rate of the cast aluminum piston. S3: Removal of the cast aluminum piston: After the cast aluminum piston in the water-cooling barrel (2) has been water-cooled for a period of time, the speed of the motor (51) is controlled by the speed controller (52) to increase. At this time, the motor (51) drives the rotating shaft (61) to rotate faster, so that the centrifugal force of the rotating shaft (61) can overcome the pressure of the cast aluminum piston on the spiral strip (613) through the base plate (71), the transmission column (611) and the fixed block (612), so that the spiral strip (613) can be The support plate (71) is passively slid in the thread groove (63) until the fixed block (612) is tightly attached to the upper end of the rotating shaft (61) and does not move further. During this process, the support plate (71) pushes the limit plate (82) so that the limit plate (82) is temporarily hidden in the slot of the water cooling barrel (2) with the axis of the fixed shaft (81) as the center. When the support plate (71) moves to a position higher than the hidden position of the limit plate (82), the limit plate (82) is restored under the gravity of the weight block (83), and the limit plate (82) is in the water cooling barrel. (2) The cast aluminum piston rotating at high speed on the inner horizontal plane can shake off the water stains on its surface, thereby stopping the operation of the motor (51). The cast aluminum piston on the support plate (71) loses the rotational centrifugal force of the transmission column (611) and can push the fixed block (612) to slide in the rotating shaft (61) again by its own weight until the support plate (71) is restricted by the limit plate (82). Then, the user can remove the cooled cast aluminum piston from the support plate (71). At this time, the slide rod (76) is The second telescopic spring (74) recovers under the contraction force, and finally rotates the support plate (71). The support plate (71) drives the rotor inside the motor (51) to rotate slightly through the transmission column (611) and the rotating shaft (61), so that the notch (72) is aligned with the position of the limit plate (82). The support plate (71) is pressed through the fixing rod (73), so that the support plate (71) can be moved below the limit plate (82) so that other cast aluminum pistons can be cooled by water later.

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