Cooling water jacket assembly for cylinder body of methanol dual-fuel engine

Abstract

The invention discloses a methanol dual-fuel engine cylinder body cooling water jacket assembly in the technical field of engine cylinder body cooling, which is arranged on the outer side of a cylinder hole in an engine cylinder body, a groove body for accommodating the cooling water jacket assembly is formed in the outer side of the cylinder hole, and the cooling water jacket assembly comprises a mounting piece arranged at a groove opening of the groove body, a cooling water jacket body is arranged at the bottom of the mounting part, an annular cooling water cavity is formed in the cooling water jacket body, a spiral air bag is embedded in the inner wall of the cooling water cavity and communicated with an air supply part arranged on the mounting part, and a detection part is embedded in the inner wall of the cooling water jacket body. The detection piece is arranged to be matched with the air supply part and the spiral air bag, self-adaptive expansion and contraction of the spiral air bag are controlled, the cooling water flowing channel of the cooling water cavity and the cooling water flowing speed can be adjusted in real time according to the cylinder hole temperature, and different working condition requirements are flexibly and adaptively met.

Description

Technical Field

[0001] The invention relates to the field of engine cylinder cooling, and in particular to a methanol dual-fuel engine cylinder cooling water jacket assembly. Background Art

[0002] Methanol fuel, due to its high octane number and low emissions, is gradually becoming an alternative fuel to gasoline and diesel. However, the heat load generated by methanol combustion is significantly higher than that of traditional fuels. This leads to concentrated thermal stress in current methanol dual-fuel engines, especially around the cylinder bores on the cylinder block, which is prone to local overheating, seriously affecting the reliability and life of the engine. Currently, cooling water jackets are usually installed around the cylinder bores. However, existing cooling water jackets have the following defects when used: Most cooling water jackets use fixed flow channels to circulate cooling water, and the cooling water flows at a constant flow rate to dissipate heat. In this method, during the cold start phase, if the coolant flows too fast, it is easy to cause the cylinder to heat up slowly, thereby causing incomplete combustion of methanol. If the coolant flows too slowly, it will affect the heat exchange efficiency of the cylinder at high temperatures, significantly increasing the risk of thermal deformation and detonation of the cylinder, and cannot effectively adapt to different working conditions. For this reason, we propose a methanol dual-fuel engine cylinder cooling water jacket assembly. Summary of the Invention

[0003] The purpose of the present invention is to provide a methanol dual-fuel engine cylinder cooling water jacket assembly, which solves the technical problem that most existing cooling water jackets use fixed flow channels to circulate cooling water, and the cooling water flows at a constant flow rate to dissipate heat, which cannot effectively adapt to different working conditions.

[0004] The present invention achieves the above-mentioned purpose through the following technical solutions: A methanol dual-fuel engine cylinder block cooling water jacket assembly is provided on the outer side of a cylinder bore on the engine cylinder block, a groove body for accommodating the cooling water jacket assembly is opened on the outer side of the cylinder bore, the cooling water jacket assembly includes a mounting piece provided at the groove mouth of the groove body, a cooling water jacket body is provided at the bottom of the mounting piece, an annular cooling water chamber is provided in the cooling water jacket body, a spiral airbag is embedded in the inner wall of the cooling water chamber, the spiral airbag is communicated with an air supply portion provided on the mounting piece, a detection piece for detecting the temperature outside the cylinder bore is embedded in the inner wall of the cooling water jacket body, when the detection piece detects that the temperature outside the cylinder bore reaches a preset threshold value, the air supply portion drives the air supply portion to supply air to the spiral airbag, so as to drive the spiral airbag to expand to form a spiral cooling channel in the cooling water chamber, the cooling water chamber is communicated with a water inlet portion provided on the mounting piece, and the cooling water chamber is also communicated with one end of a water outlet pipe that passes through the mounting piece.

[0005] A further improvement is that the mounting piece and the tank body are both annular, the inner and outer walls of the mounting piece are embedded with sealing rings for contacting the inner wall of the tank body, and the mounting piece is provided with several groups of fixing parts for fixing the mounting piece to the tank body.

[0006] A further improvement is that the fixing portion includes a slot opened at the top of the mounting member, a movable block movably arranged in the slot, an elastic member connecting the movable block and the inner wall of the slot, a clamping block arranged on the side of the movable block away from the elastic member, and a flip handle hingedly arranged on the movable block, and a clamping slot for the clamping block to enter is opened on the inner wall of the slot.

[0007] A further improvement is that the air supply part includes several groups of active chambers opened in the mounting part, one end of the active chamber is connected to the spiral airbag through a pipeline, the inner wall of one side of the active chamber is provided with a telescopic device electrically connected to the detection part, and the output end of the telescopic device is provided with a piston plate adapted to the active chamber, and the piston plate is driven by the telescopic device to compress the gas in the active chamber into the spiral airbag to drive the spiral airbag to expand.

[0008] A further improvement is that the water inlet portion includes a mounting seat embedded in the mounting piece, a flow cavity is opened in the mounting seat, a water inlet pipe connected to the flow cavity is provided on the mounting seat, and the flow cavity is connected to the cooling water cavity through the water inlet channel.

[0009] A further improvement is that a follower impeller is provided in the flow chamber, and the follower impeller is driven to rotate by the cooling water entering the water inlet pipe, and the two ends of the shaft of the follower impeller extend into the mounting grooves opened on both sides of the mounting seat respectively, and a fan blade is provided in the mounting groove, and the fan blade is connected to the shaft of the follower impeller by transmission, and a through-hole cover is provided at the notch of the mounting groove, and the mounting groove is connected to several groups of heat dissipation pipes, and one end of the heat dissipation pipe passes through the bottom of the mounting piece and extends to the outside of the cooling water jacket body, and a through opening is opened on the mounting piece and at a position outside the cooling water jacket body.

[0010] A further improvement is that a frame-type plate is provided in an active cavity close to the mounting seat and at one end away from the piston plate, the frame-type plate is connected to the inner wall of the active cavity through an elastic structure 1, the piston plate is connected to one end of a pull rope, the other end of the pull rope extends to the mounting groove on one side of the mounting seat and is connected to a magnetic ring 2, the magnetic ring 2 is movably sleeved on the outside of the follower impeller shaft and is connected to the inner wall of the mounting groove through an elastic structure 2, one side of the magnetic ring 2 is adhered to a magnetic ring 1 adsorbed by the magnetic ring 2, the magnetic ring 1 is fixed to the follower impeller shaft, the frame-type plate is driven to move by the piston plate to drive the pull rope to pull the magnetic ring 1 and the magnetic ring 2 apart, thereby causing the follower impeller to rotate through the cooling water.

[0011] A further improvement is that the mounting piece is detachably fixedly connected to the cooling water jacket body.

[0012] The beneficial effects of the present invention are: The present invention is provided with a detection part, an air supply part and a spiral airbag. By controlling the adaptive expansion and contraction of the spiral airbag, the flow channel for cooling water in the cooling water chamber and the cooling water flow rate can be adjusted in real time according to the cylinder bore temperature. During the cold start stage, the cooling water is made to flow at a low speed in the cooling water chamber, which ensures the basic heat exchange requirements and also plays a certain role in preventing the problem of decreased combustion efficiency caused by overcooling of the cylinder body during the cold start stage. When the cylinder body is high in temperature, the cooling water flow path in the cooling water jacket is transformed into flowing along the spiral channel formed by the expanded spiral airbag. The spiral channel compresses the cross-sectional area of the flow channel, increases the flow rate of the coolant in the cooling water chamber, thereby improving the heat exchange efficiency of the cooling water, and realizes uniform cooling of the cylinder bore, effectively preventing the cylinder body from being damaged by high temperature, and flexibly adapting to different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of the cooling water jacket assembly of the present invention being installed on an engine cylinder block; Figure 2 It is a schematic structural diagram of the cooling water jacket assembly of the present invention; Figure 3 For the present invention Figure 2 Partial structural cross-sectional view; Figure 4 It is a schematic diagram of the local structure of the mounting member of the present invention; Figure 5 It is a schematic structural diagram of the water inlet part of the present invention.

[0014] In the figure: 1. Cylinder hole; 101. Tank body; 2. Mounting part; 3. Cooling water jacket body; 4. Fixed part; 41. Movable block; 42. Clamping block; 43. Flip handle; 44. Elastic part; 5. Sealing ring; 6. Cooling water chamber; 7. Through port; 8. Spiral airbag; 9. Movable chamber; 10. Telescopic device; 11. Heat dissipation pipeline; 12. Mounting seat; 13. Water inlet pipe; 14. Follow-up impeller; 15. Water outlet pipe; 16. Detection part; 17. Mounting groove; 18. Magnetic ring 1; 19. Magnetic ring 2; 20. Blade part; 21. Pull rope; 22. Frame plate. DETAILED DESCRIPTION

[0015] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0016] Example 1 Please see the attached Figure 1-3A methanol dual-fuel engine cylinder block cooling water jacket assembly is provided on the outside of a cylinder hole 1 on the engine cylinder block. The engine cylinder block generally has a plurality of cylinder holes 1. The cooling water jacket assembly is used to cool the cylinder hole 1. A groove 101 for accommodating a cooling water jacket assembly is provided on the outside of the cylinder bore 1. The groove 101 is annular and coaxial with the cylinder bore 1. The cooling water jacket assembly is placed in the groove 101 and then wrapped around the outside of the cylinder bore 1. The heat in the cylinder bore 1 is conducted through the cylinder wall to the cooling water jacket assembly on the outside, and is cooled by the cooling water jacket assembly. The cooling water jacket assembly includes a mounting member 2 provided at the notch of the tank body 101. The mounting member 2 and the tank body 101 are both annular. The inner and outer walls of the mounting member 2 are embedded with sealing rings 5 for contacting the inner wall of the tank body 101. The sealing rings 5 are preferably made of high-temperature resistant rubber sealing rings. The sealing rings 5 ensure the sealing between the mounting member 2 and the tank body 101. The mounting member 2 is provided with a plurality of fixing portions 4 for fixing the mounting member 2 to the tank body 101. A cooling water jacket body 3 is provided at the bottom of the mounting member 2. The mounting member 2 and the cooling water jacket body 3 are detachably fixedly connected. For example, the two can be connected by a bolt-type structure, which is convenient for replacement when the cooling water jacket body 3 is damaged or leaking. The cross section of the cooling water jacket body 3 is annular. The cooling water jacket body 3 is made of a heat-conducting material, such as an aluminum alloy. The inner wall of the cooling water jacket body 3 fits the inner wall of the tank body 101 so that the heat conducted from the cylinder wall can be further conducted to the cooling water inside it for heat exchange. There is a certain gap between the outer wall of the cooling water jacket body 3 and the outer wall of the tank body 101 to facilitate air flow and improve cooling quality. An annular cooling water chamber 6 is provided in the cooling water jacket body 3 for cooling water to flow for heat exchange cooling. A spiral airbag 8 is embedded in the inner wall of the cooling water chamber 6. The spiral airbag 8 is made of a high-temperature resistant rubber airbag, for example. In addition, an anti-corrosion coating can be provided on the outer wall of the spiral airbag 8 to extend the service life of the spiral airbag 8 in the cooling water. It is not described in detail here. A spiral limiting groove is provided on the inner wall of the cooling water chamber 6 to cooperate with the spiral airbag 8 to limit the radial movement of the spiral airbag 8 when inflated, and it will not move axially. The spiral airbag 8 is connected to the air supply portion provided on the mounting member 2, and the cooling water A detection member 16 for detecting the temperature outside the cylinder bore 1 is embedded in the outer wall of the sleeve. The detection member 16 may include a temperature detection sensor and an external controller electrically connected to the temperature detection sensor, but is certainly not limited to the above-mentioned one. The heat in the cylinder bore 1 is transferred to the outside of the cylinder bore 1 through the cylinder wall, and then the detection member 16 detects the heat. When the detection member 16 detects that the temperature outside the cylinder bore 1 reaches a preset threshold (pre-set by the user), it drives the air supply part to supply air to the spiral airbag 8, so as to drive the spiral airbag 8 to expand and form a spiral cooling channel in the cooling water chamber 6; When the detection component 16 does not drive the air supply part to expand the spiral airbag 8, it indicates that the temperature of the cylinder bore 1 is in a low state (such as cold start or low temperature environment). At this time, the cooling water jacket body 3 flows along its axial direction in the cooling water chamber 6. The cross-sectional area of the flow channel in the cooling water chamber 6 is large, which significantly reduces the flow resistance, so that the flow rate of the entering cooling water is low, reducing the power consumption of water pump equipment, avoiding excessive cooling and causing the cylinder wall temperature to be lower than the ideal working range. At the same time, the low-speed flow prolongs the residence time of the coolant in the cooling water chamber 6, ensuring the basic heat exchange requirements, and also plays a certain role in preventing the problem of decreased combustion efficiency caused by overcooling of the cylinder body during the cold start stage; and when the detection component 16 drives the air supply part to expand the spiral airbag 8, it indicates that the temperature of the cylinder bore 1 has risen to a higher working range. At this time, the cooling water flow path in the cooling water jacket is transformed into a spiral channel formed along the expanded spiral airbag 8. First, the spiral channel compresses the cross-sectional area of the flow channel, thereby increasing the flow rate of the coolant in the cooling water chamber 6, thereby increasing the heat exchange efficiency of the cooling water, and the cooling water flows in a spiral manner to achieve uniform cooling of the cylinder bore 1, effectively preventing the cylinder body from being damaged by high temperature. The present invention can adjust the cooling water chamber 6 in real time according to the temperature of the cylinder bore 1 through the adaptive expansion and contraction of the spiral airbag 8, change the flow rate of the cooling water, and effectively avoid the tedious operations in the traditional cooling system that require operators to frequently manually adjust the water pump speed, switch the bypass valve, etc., significantly reducing the need for manual intervention, and also effectively eliminating the risk of overcooling oscillation or heat dissipation delay caused by human error.

[0017] The cooling water chamber 6 is connected to the water inlet provided on the mounting member 2, and the cooling water chamber 6 is also connected to one end of the water outlet pipe 15 that passes through the mounting member 2. One end of the water inlet and the water outlet pipe 15 can be connected to external cooling water circulation equipment. The external cooling water circulation equipment, for example, includes a water tank, a booster water pump and a cooler, which are conventional equipment in this field and will not be described in detail here.

[0018] Example 2 Please see the attached Figure 2 Based on the first embodiment, the fixing portion 4 of this embodiment includes a notch formed on the top of the mounting member 2, a movable block 41 movably disposed in the notch (the movable block 41 is slidably connected to the notch), an elastic member 44 (such as a spring) connecting the movable block 41 and the inner wall of the notch, a clamping block 42 disposed on a side of the movable block 41 away from the elastic member 44, and a flip handle 43 hingedly disposed on the movable block 41. A clamping slot for the clamping block 42 to enter is provided on the inner wall of the slot body 101. The fixing portion 4 is provided with at least two groups. During installation, the movable block 41 is pulled by the flip handle 43 to move and squeeze the elastic member 44 so that the clamping block 42 moves into the slot. After the mounting member 2 is placed in the slot body 101, the flip handle 43 is released. The movable block 41 drives the clamping block 42 into the slot under the action of the elastic member 44. In this way, the cooling water jacket assembly can be quickly installed on the engine block or removed. In addition, the cooling water jacket assemblies on the outside of each cylinder bore 1 are independent of each other. When a single cooling water jacket assembly leaks or is damaged, the faulty unit can be removed and replaced individually without the need to disassemble or replace the entire cooling system, which greatly reduces maintenance costs and time.

[0019] Example 3 Please see the attached Figure 2-5 On the basis of Example 1, the air supply portion of this embodiment includes several groups of active chambers 9 opened in the mounting member 2, at least two groups, one end of the active chamber 9 is connected to the spiral airbag 8 through a pipeline, and the inner wall of one side of the active chamber 9 is provided with a telescopic device 10 electrically connected to the detection member 16. The telescopic device 10 is, for example, a miniature electric telescopic rod, etc. The output end of the telescopic device 10 is provided with a piston plate adapted to the active chamber 9. The piston plate is driven by the telescopic device 10 to compress the gas in the active chamber 9 into the spiral airbag 8, driving the spiral airbag 8 to expand. The space in the active chamber 9 and on one side of the piston plate is filled with gas, which is preferably an inert gas.

[0020] Preferably, the water inlet portion of this embodiment includes a mounting seat 12 embedded in the mounting member 2, a flow cavity is opened in the mounting seat 12, the vertical cross-section of the flow cavity is circular, and a water inlet pipe 13 connected to the flow cavity is provided on the mounting seat 12. The water inlet pipe 13 is used to connect with the external cooling water circulation equipment, and the flow cavity is connected with the cooling water cavity 6 through the water inlet channel (composed of a through hole 1 opened on the mounting member 2 and a through hole 2 opened on the cooling water jacket body 3).

[0021] Preferably, a follower impeller 14 is provided in the flow chamber of the present embodiment. The follower impeller 14 includes a shaft and an impeller and other structures. The follower impeller 14 is driven to rotate by the cooling water entering the water inlet pipe 13. After the cooling water is pressurized, it enters the flow chamber from the water inlet pipe 13 to drive the follower impeller 14 to rotate, and then enters the cooling water chamber 6 through the water inlet channel. The two ends of the shaft of the follower impeller 14 extend to the mounting grooves 17 opened on both sides of the mounting seat 12 respectively. A fan blade 20 is provided in the mounting groove 17. The fan blade 20 is an induced fan blade. The fan blade 20 and the shaft of the follower impeller 14 are transmission connected. For example, the two are transmission connected by a bevel gear set (two sets of meshing bevel gears). Of course, it is not limited to this transmission connection method. It should be noted that if a bevel gear set is used, the rotation directions of the two sets of fan blades 20 are opposite. Therefore, the corresponding fan blade 20 can be selected according to the rotation direction. The slot of the mounting groove 17 is provided with a through-hole cover plate, which can be fixed to the slot by bolts. The through-hole cover plate is a plate with several through-holes. The mounting groove 17 is connected with several groups of heat dissipation pipes 11, and one end of the heat dissipation pipe 11 passes through the bottom of the mounting member 2 and extends to the outside of the cooling water jacket body 3. A through-hole 7 is opened on the mounting member 2 and at a position outside the cooling water jacket body 3. The through-hole 7 can be used to externally pipe the pipe to the outside of the engine. When the follower impeller 14 rotates, the fan blade 20 is driven to work at the same time. The fan blade 20 allows the heat in the slot body 101 to enter the mounting groove 17 through the heat dissipation pipe 11 and then be discharged from the through-holes on the through-hole cover plate. At this time, the outside air can enter the slot body 101 from the through-hole 7. The airflow flows in the area between the cooling water jacket body 3 and the inner wall of the slot body 101 to realize convection heat exchange. The air cooling method is used to further improve the cooling quality of the cylinder bore 1, reduce the cooling load of the cooling water jacket body 3, and extend its service life.

[0022] Preferably, a frame plate 22 is provided in an active cavity 9 close to the mounting seat 12 of this embodiment and at one end away from the piston plate to facilitate normal passage of gas. The frame plate 22 is connected to the inner wall of the active cavity 9 through an elastic structure 1. The piston plate is connected to one end of a pull rope 21. The other end of the pull rope 21 extends to the mounting groove 17 on one side of the mounting seat 12 and is connected to a magnetic ring 2 19. The magnetic ring 2 19 is movably sleeved on the outer side of the shaft of the follower impeller 14 and is connected to the inner wall of the mounting groove 17 through the elastic structure 2. Both the elastic structure 1 and the elastic structure 2 may preferably adopt an elastic telescopic rod. A magnetic ring 18 adsorbed by the magnetic ring 2 19 is attached to one side of the magnetic ring 2 19, and the magnetic poles of the magnetic ring 2 19 and the magnetic ring 1 18 are On the contrary, the magnetic ring 18 is fixed on the shaft of the follower impeller 14. When the magnetic ring 2 19 and the magnetic ring 18 are attracted to each other, the shaft of the follower impeller 14 is fixed and cannot rotate under the action of the cooling water. When the cylinder bore 1 is at a high temperature, the detection part 16 drives the telescopic device 10, and the telescopic device 10 drives the piston plate to move. During the movement of the piston plate, the frame plate 22 is driven by the piston plate to move and drive the pull rope 21 to pull the magnetic ring 18 and the magnetic ring 2 19 apart. At this time, the fixation of the magnetic ring 2 19 is lost, and the shaft of the follower impeller 14 is contacted and fixed, and then the cooling water causes the follower impeller 14 to rotate, thereby improving the quality and efficiency of the cooling water jacket assembly in cooling the cylinder bore 1 when it is at a high temperature.

[0023] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A methanol dual-fuel engine cylinder block cooling water jacket assembly, arranged outside a cylinder hole (1) on the engine cylinder block, wherein a groove (101) for accommodating the cooling water jacket assembly is provided outside the cylinder hole (1), and the cooling water jacket assembly includes a mounting member (2) arranged at a notch of the groove (101), characterized in that: A cooling water jacket body (3) is provided at the bottom of the mounting member (2), an annular cooling water chamber (6) is provided in the cooling water jacket body (3), a spiral airbag (8) is embedded in the inner wall of the cooling water chamber (6), the spiral airbag (8) is communicated with an air supply portion provided on the mounting member (2), a detection member (16) for detecting the temperature outside the cylinder hole (1) is embedded in the inner wall of the cooling water jacket body (3), and when the detection member (16) detects that the temperature outside the cylinder hole (1) reaches a preset threshold, the air supply portion drives the air supply portion to supply air to the spiral airbag (8) to drive the spiral airbag (8) to expand and form a spiral cooling channel in the cooling water chamber (6), the cooling water chamber (6) is communicated with a water inlet portion provided on the mounting member (2), and the cooling water chamber (6) is also communicated with one end of a water outlet pipe (15) that passes through the mounting member (2).

2. The cooling water jacket assembly according to claim 1, characterized in that: The mounting member (2) and the trough body (101) are both annular, and sealing rings (5) for contacting the inner wall of the trough body (101) are embedded in the inner and outer walls of the mounting member (2). The mounting member (2) is provided with a plurality of fixing portions (4) for fixing the mounting member (2) to the trough body (101).

3. The cooling water jacket assembly according to claim 2, characterized in that: The fixing portion (4) comprises a notch formed on the top of the mounting member (2), a movable block (41) movably disposed in the notch, an elastic member (44) connecting the movable block (41) and the inner wall of the notch, a clamping block (42) disposed on a side of the movable block (41) away from the elastic member (44), and a flip handle (43) hingedly disposed on the movable block (41); and a clamping slot for the clamping block (42) to enter is formed on the inner wall of the slot body (101).

4. The cooling water jacket assembly according to claim 1, characterized in that: The air supply portion includes a plurality of groups of active chambers (9) opened in the mounting member (2), one end of the active chamber (9) is connected to the spiral airbag (8) through a pipeline, an inner wall of one side of the active chamber (9) is provided with a telescopic device (10) electrically connected to the detection member (16), and an output end of the telescopic device (10) is provided with a piston plate adapted to the active chamber (9), and the piston plate is driven by the telescopic device (10) to compress the gas in the active chamber (9) into the spiral airbag (8) to drive the spiral airbag (8) to expand.

5. The cooling water jacket assembly according to claim 4, characterized in that: The water inlet portion comprises a mounting seat (12) embedded in the mounting member (2), a flow cavity is provided in the mounting seat (12), a water inlet pipe (13) connected to the flow cavity is provided on the mounting seat (12), and the flow cavity is connected to the cooling water cavity (6) through a water inlet channel.

6. The cooling water jacket assembly according to claim 5, characterized in that: A follower impeller (14) is provided in the flow cavity, and the follower impeller (14) is driven to rotate by cooling water entering through the water inlet pipe (13). Both ends of the shaft of the follower impeller (14) extend into the mounting grooves (17) provided on both sides of the mounting seat (12). A fan blade (20) is provided in the mounting groove (17). The fan blade (20) and the shaft of the follower impeller (14) are connected in a transmission manner. A through-hole cover plate is provided at the notch of the mounting groove (17). The mounting groove (17) is connected to a plurality of heat dissipation pipes (11), and one end of the heat dissipation pipe (11) passes through the bottom of the mounting member (2) and extends to the outside of the cooling water jacket body (3). A through opening (7) is provided on the mounting member (2) and at a position outside the cooling water jacket body (3).

7. The cooling water jacket assembly according to claim 6, characterized in that: A frame plate (22) is provided in a movable cavity (9) close to the mounting seat (12) and at one end away from the piston plate. The frame plate (22) is connected to the inner wall of the movable cavity (9) through an elastic structure. The piston plate is connected to one end of a pull rope (21). The other end of the pull rope (21) extends into a mounting groove (17) on one side of the mounting seat (12) and is connected to a second magnetic ring (19). The second magnetic ring (19) is movably sleeved on the shaft of the impeller (14). The outer side is connected to the inner wall of the mounting groove (17) through the elastic structure 2, and one side of the magnetic ring 2 (19) is attached to the magnetic ring 1 (18) adsorbed by the magnetic ring 2 (19), and the magnetic ring 1 (18) is fixed to the shaft of the follower impeller (14). The frame plate (22) is driven by the piston plate to move and drive the pull rope (21) to pull the magnetic ring 1 (18) and the magnetic ring 2 (19) apart, thereby causing the follower impeller (14) to rotate through the cooling water.

8. The cooling water jacket assembly according to claim 1, characterized in that: The mounting member (2) is detachably fixedly connected to the cooling water jacket body (3).

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