Dual cooling generator

Abstract

The invention discloses a dual-cooling generator, comprising a rotating shaft, on which a rotor claw pole is arranged, and blades are arranged at both ends of the rotor claw pole; a front end cover, which is sleeved outside the rotor claw pole and the blades, an annular coolant circulation cavity for containing coolant is arranged in the side wall of the front end cover, a liquid inlet and a liquid outlet are arranged on the outer wall of the coolant circulation cavity, a cavity diaphragm is arranged between the liquid inlet and the liquid outlet in the coolant circulation cavity, one end of the coolant circulation cavity is open, and a multi-stage annular groove is arranged on the front end cover with the open coolant circulation cavity as the middle part to the inner and outer rings respectively; a rear end cover, which is detachably connected with the front end cover, and a multi-stage annular protrusion is arranged on the rear end cover to mesh with the multi-stage annular grooves on the front end cover respectively, a liquid accumulation cavity is arranged at the meshing place of the protrusion and the groove, and a sealing ring is arranged at the meshing place between the groove wall of the groove and the gap between the protrusions of the rear end cover. The invention realizes air cooling and liquid cooling of the generator by fanning wind and continuous flow of coolant in the coolant circulation cavity through the fan blades, accelerates the cooling speed of the generator, and improves the working efficiency of the generator.

Description

Technical Field

[0001] The invention relates to the technical field of generators, and in particular to a double-cooled generator. Background Art

[0002] As an assembly part of the engine, improving the working efficiency of the generator can help the engine system save energy and reduce emissions. For this reason, high-efficiency generators have become the main development and application trend at present. How to effectively improve the working efficiency of the current generator has become the main research goal of various generator manufacturers. As we all know, in order to improve the working efficiency of the generator, it is necessary to first reduce the temperature of each heating component. Therefore, reducing the heat generation of the generator and improving the heat dissipation capacity are the key. The existing heat dissipation cooling method of automobile generators is mostly single air cooling, and other effective cooling methods are rarely used, and the single air cooling efficiency is low. Summary of the invention

[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0004] Another object of the present invention is to provide a dual-cooled generator, which provides a coolant circulation chamber in the front end cover and provides fan blades at both ends of the rotor claw poles. The coolant circulates in the coolant circulation chamber to continuously take away the heat of the generator, and the fan blades rotate with the rotor claw poles to accelerate the flow of surrounding air, thereby achieving liquid cooling and air blowing heat dissipation of the generator at the same time, thereby improving the heat dissipation speed of the generator and thereby improving the working efficiency of the generator.

[0005] In order to achieve these purposes and other advantages according to the present invention, there is provided a dual-cooling generator, comprising:

[0006] A rotating shaft, on which a rotor claw pole is arranged which can rotate with the rotating shaft, and fan blades are evenly arranged at both ends of the rotor claw pole;

[0007] A front end cover is sleeved on the outer side of the rotor claw pole and the fan blade, an annular coolant circulation cavity filled with coolant is arranged inside the side wall of the front end cover, a liquid inlet and a liquid outlet are arranged on the side wall of the coolant circulation cavity away from the rotor claw pole, a cavity diaphragm is arranged between the liquid inlet and the liquid outlet in the coolant circulation cavity, a first front end cover inner annular groove and a first front end cover outer annular groove are arranged on one end surface of the front end cover, one end of the coolant circulation cavity is open, and the opening of the coolant circulation cavity is located between the first front end cover inner annular groove and the first front end cover outer annular groove;

[0008] The cover is provided with a first inner ring protrusion and a first outer ring protrusion which are respectively engaged with the first inner ring groove and the first outer ring groove of the first front end cover, and a first inner liquid accumulation cavity is provided at the place where the first inner ring groove and the first inner ring protrusion of the first rear end cover are engaged, and a first outer liquid accumulation cavity is provided at the place where the first inner ring groove and the first outer ring groove of the first rear end cover are engaged, and a first-stage sealing ring is provided at the place where the groove wall between the first inner ring groove and the first outer ring groove of the first front end cover and the gap between the first inner ring protrusion and the first outer ring protrusion of the first rear end cover are engaged, and the open end of the cooling liquid circulation cavity is opposite to the first-stage sealing ring, and the groove wall of the first inner ring groove and the first outer ring groove of the first front end cover away from the cooling liquid circulation cavity and the meshing place of the rear end cover are respectively provided with a second-stage inner sealing ring and a second-stage outer sealing ring.

[0009] Preferably, in the dual-cooled generator, the first front end cover inner annular groove and the first front end cover outer annular groove on the front end cover are respectively provided with a second front end cover inner annular groove and a second front end cover outer annular groove on the open side away from the coolant circulation cavity, and the rear end cover is provided with a second rear end cover inner annular protrusion and a second rear end cover outer annular protrusion respectively meshing with the second front end cover inner annular groove and the second front end cover outer annular groove, a second inner liquid accumulation cavity is provided at the meshing place of the second front end cover inner annular groove and the second rear end cover inner annular protrusion, a second outer liquid accumulation cavity is provided at the meshing place of the second front end cover outer annular groove and the second rear end cover outer annular protrusion, and a third-stage inner sealing ring and a third-stage outer sealing ring are respectively provided at the meshing place of the second front end cover inner annular groove and the second front end cover outer annular groove away from the groove wall of the coolant circulation cavity and the rear end cover.

[0010] Preferably, the dual-cooled generator further comprises a stator, which is arranged inside the front end cover, a fixing block is arranged on the inner side wall of the front end cover, and the stator is clamped between the fixing block and the rear end cover.

[0011] Preferably, in the dual-cooled generator, a clamping sleeve is provided between the stator and the rear end cover, and a corrugated washer is provided between the clamping sleeve and the stator.

[0012] Preferably, in the dual-cooled generator, a liquid inlet pipe joint is provided at the liquid inlet on the front end cover, and a liquid outlet pipe joint is provided at the liquid outlet on the front end cover.

[0013] Preferably, in the dual-cooled generator, the liquid inlet pipe joint and the liquid outlet pipe joint are both pagoda-shaped, and the large-diameter ends of the liquid inlet pipe joint and the liquid outlet pipe joint are both sealed and connected to the front end cover.

[0014] Preferably, in the dual-cooled generator, the free end of the liquid inlet pipe joint is connected to a liquid inlet pipe, and an overflow valve is provided on the liquid inlet pipe.

[0015] Preferably, in the dual-cooled generator, one end where the front cover is connected to the rear cover is open.

[0016] Preferably, in the dual-cooled generator, a fixed support plate is provided on the outer side of the front end cover.

[0017] The present invention includes at least the following beneficial effects: 1. Coolant continuously flows in and out of the coolant circulation cavity in the front end cover to take away the heat generated by the generator, and at the same time, the fan blades continuously fan, accelerating the flow of surrounding air and generating heat exchange, realizing liquid cooling and air cooling of the generator at the same time, thereby improving the heat reduction rate of the generator and effectively improving the working efficiency of the generator; 2. A cavity diaphragm is arranged in the coolant circulation cavity to separate the liquid inlet and the liquid outlet, so as to facilitate the coolant to flow in one direction; 3. The mutually meshing annular grooves and annular protrusions arranged on the front end cover and the rear end cover realize the multi-stage sealing of the coolant circulation cavity, improve the sealing performance, and effectively prevent the leakage of the coolant; 4. A liquid accumulation cavity with a certain volume is arranged at the meshing position of the annular groove of the front end cover and the annular protrusion of the rear end cover. The liquid accumulation cavity can be used to store the leaked coolant after the first-stage sealing ring is not sealed tightly and leakage occurs. The liquid accumulation cavity can balance the pressure of the coolant entering it, thereby effectively buffering the second-stage sealing ring.

[0018] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A cross-sectional view of a dual-cooling generator in one of the technical solutions of the present invention;

[0020] Figure 2 for Figure 1 An enlarged schematic diagram of part A is shown;

[0021] Figure 3 It is a schematic diagram of the annular groove structure of the front end cover of a dual-cooling generator in one of the technical solutions of the present invention;

[0022] Figure 4 The figure is a schematic diagram of the annular protrusion structure of the rear end cover of a dual-cooling generator in one of the technical solutions of the present invention.

[0023] Wherein: 1-front end cover, 2-fixed block, 3-liquid inlet pipe joint, 4-cavity diaphragm, 5-corrugated gasket, 6-liquid outlet pipe joint, 7-rear end cover, 8-pressing sleeve, 9-fixed support plate, 10-cooling liquid flow chamber, 11-rotating shaft, 12-rotor claw pole, 13-fan blade, 14-stator, 15-first outer liquid accumulation chamber, 16-second outer liquid accumulation chamber, 17-second rear end cover outer annular protrusion, 18-third stage outer sealing ring, 19-second stage outer sealing ring, 20-first rear end cover outer annular protrusion, 21-first stage sealing ring, 22-second stage inner sealing ring, 23-first rear end cover inner annular protrusion, 24-first inner liquid accumulation chamber, 25-first front end cover inner annular groove, 26-first front end cover outer annular groove, 27-second front end cover outer annular groove. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0025] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0026] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial sources unless otherwise specified; in the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, set, or detachably connected, set, or connected and set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in specific circumstances. The orientation or position relationship indicated by the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0027] In one of the technical solutions, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the present invention provides a dual-cooling generator, comprising:

[0028] A rotating shaft 11, on which a rotor claw pole 12 is arranged which can rotate with the rotating shaft 11, and blades 13 are evenly arranged at both ends of the rotor claw pole 12;

[0029] A front end cover 1 is sleeved on the outer side of the rotor claw pole 12 and the fan blade 13, and an annular coolant circulation chamber 10 filled with coolant is arranged inside the side wall of the front end cover 1. A liquid inlet and a liquid outlet are arranged on the side wall of the coolant circulation chamber 10 away from the rotor claw pole 12, and a cavity diaphragm 4 is arranged between the liquid inlet and the liquid outlet in the coolant circulation chamber 10. A first front end cover inner annular groove 25 and a first front end cover outer annular groove 26 are arranged on one end surface of the front end cover 1, and one end of the coolant circulation chamber 10 is open, and the opening of the coolant circulation chamber 10 is located between the first front end cover inner annular groove 25 and the first front end cover outer annular groove 26;

[0030] The rear end cover 7 is arranged at the open end of the cooling liquid circulation cavity 10 and is detachably connected to the front end cover 1. The rear end cover 7 is provided with a first rear end cover inner annular protrusion 23 and a first rear end cover outer annular protrusion 20 respectively meshing with the first front end cover inner annular groove 25 and the first front end cover outer annular groove 26. A first inner liquid accumulation cavity 24 is provided at the meshing place of the first front end cover inner annular groove 25 and the first rear end cover inner annular protrusion 23, and a first outer liquid accumulation cavity 1 is provided at the meshing place of the first front end cover outer annular groove 26 and the first rear end cover outer annular protrusion 20. 5, a first-stage sealing ring 21 is arranged at the meshing position between the groove wall between the first front end cover inner annular groove 25 and the first front end cover outer annular groove 26 and the gap between the first rear end cover inner annular protrusion 23 and the first rear end cover outer annular protrusion 20, the open end of the coolant flow cavity 10 is opposite to the first-stage sealing ring 21, and a second-stage inner sealing ring 22 and a second-stage outer sealing ring 19 are respectively arranged at the meshing position between the groove wall of the first front end cover inner annular groove 25 and the first front end cover outer annular groove 26 away from the coolant flow cavity 10 and the rear end cover 7.

[0031] The dual-cooled generator provided by the technical solution includes a front cover 1 and a rear cover 7 that are detachably connected. A cooling liquid circulation chamber 10 filled with cooling liquid is arranged inside the side wall of the front cover 1, which is convenient for the cooling liquid to circulate inside the front cover, realizes heat exchange between the cooling liquid and the generator, and reduces the temperature of the generator. A liquid inlet and a liquid outlet connected to the cooling liquid circulation chamber 10 are arranged on the outer wall of the front cover 1. A cavity diaphragm 4 is arranged inside the cooling liquid circulation chamber 10 to separate the liquid inlet and the liquid outlet. The liquid inlet and the liquid outlet are separated by the cavity diaphragm 4 so that after the cooling liquid flows into the liquid inlet, it circulates in the cooling liquid circulation chamber 10 along the side wall of the front cover 1 for a circle, and finally flows out from the liquid outlet, even if the cooling liquid flows in from the liquid inlet. The liquid flows in one direction, and a first front end cover inner annular groove 25 and a first front end cover outer annular groove 26 are provided on one end surface of the front end cover 1. One end of the cooling liquid flow cavity 10 is open and the open end is located between the first front end cover inner annular groove 25 and the first front end cover outer annular groove 26; the rear end cover 7 is provided with a first rear end cover inner annular protrusion 23 and a first rear end cover outer annular protrusion 20 which are respectively engaged with the first front end cover inner annular groove 25 and the first front end cover outer annular groove 26, and the engagement point of the first front end cover inner annular groove 25 and the first rear end cover inner annular protrusion 23 and the engagement point of the first front end cover outer annular groove 26 and the first rear end cover outer annular protrusion 23 are respectively A first inner liquid accumulation chamber 24 and a first outer liquid accumulation chamber 15 are provided, a first-stage sealing ring 21 is provided at the joint between the open end of the coolant flow chamber 10 and the rear end cover 7, a second-stage inner sealing ring 22 and a second-stage outer sealing ring 19 are provided at the joint between the groove wall of the first front end cover 25 and the first front end cover outer annular groove 26 away from the coolant flow chamber 10 and the rear end cover 7, respectively. The purpose of providing the first-stage sealing ring and the second-stage inner and outer sealing rings is to further prevent the coolant in the coolant flow chamber from flowing out of the cavity and causing leakage; when the first-stage sealing ring is not sealed tightly, the coolant will leak into the first inner liquid accumulation chamber or the first outer liquid accumulation chamber, when the first inner liquid accumulation chamber or the second outer liquid accumulation chamber After the cavity is filled with coolant, the pressure in all directions on the entire liquid accumulation cavity is balanced, so that the pressure at each position of the second-stage sealing ring and the second-stage outer sealing ring is the same, that is, the liquid accumulation cavity is equivalent to a buffer zone, so that the pressure acting on the next-stage sealing ring is evenly distributed; the dual-cooling generator provided by the present technical solution also includes a rotating shaft 11, on which a rotor claw pole 12 that can rotate with the rotating shaft 11 is arranged, and fan blades 13 are evenly arranged at both ends of the rotor claw pole 12, and the fan blades are connected to the rotor claw pole by welding or riveting. The rotor claw pole 12 and the fan blades 13 are both located inside the front end cover 1, and the fan blades fan wind to accelerate the air circulation inside the generator to cool the generator.

[0032] Coolant is continuously introduced into the coolant circulation cavity through the liquid inlet, and the coolant flows to the liquid outlet in the same direction. The continuous inflow of coolant generates heat exchange with the generator, and then the outflow of coolant takes away the heat generated by the generator, thereby reducing the temperature of the generator, that is, realizing liquid cooling. At the same time, the rotation of the rotor claw poles of the generator drives the fan blades to rotate, thereby accelerating the air flow near the generator and generating heat exchange, thereby reducing the temperature of the generator, that is, realizing air cooling of the generator.

[0033] The present invention includes at least the following beneficial effects: the coolant continuously flows in and out of the coolant circulation cavity in the front end cover to take away the heat generated by the generator, and at the same time, the fan blades continuously fan, accelerating the flow of surrounding air and generating heat exchange, thereby realizing liquid cooling and air cooling of the generator at the same time, thereby improving the heat reduction rate of the generator and improving the working efficiency of the generator; a cavity diaphragm is provided in the coolant circulation cavity to separate the liquid inlet and the liquid outlet, so as to facilitate the coolant to flow in one direction; the mutually meshing multi-stage annular grooves and multi-stage annular protrusions provided on the front end cover and the rear end cover realize the multi-stage sealing of the coolant circulation cavity, which can improve the sealing performance and effectively prevent the coolant from leaking; a liquid accumulation cavity with a certain volume is provided at the meshing position of the annular groove of the front end cover and the annular protrusion of the rear end cover, and the liquid accumulation cavity can be used to store the leaked coolant after the first-stage sealing ring is not sealed tightly and leakage occurs, and the liquid accumulation cavity can balance the pressure of the coolant entering it, thereby effectively buffering the second-stage sealing ring.

[0034] In another technical solution, Figure 2 and Figure 4 As shown, in the dual-cooled generator, the first front end cover inner annular groove 25 and the first front end cover outer annular groove 26 on the front end cover 1 are respectively provided with a second front end cover inner annular groove and a second front end cover outer annular groove 27 away from the open side of the coolant circulation chamber 10, and the rear end cover 7 is provided with a second rear end cover inner annular protrusion and a second rear end cover outer annular protrusion 17 respectively meshing with the second front end cover inner annular groove and the second front end cover outer annular groove 27, a second inner liquid accumulation chamber is provided at the meshing position of the second front end cover inner annular groove and the second rear end cover inner annular protrusion, a second outer liquid accumulation chamber 16 is provided at the meshing position of the second front end cover outer annular groove 27 and the second rear end cover outer annular protrusion 17, and a third-stage inner sealing ring and a third-stage outer sealing ring 18 are respectively provided at the meshing position of the second front end cover inner annular groove and the second front end cover outer annular groove 27 away from the groove wall of the coolant circulation chamber 10 and the rear end cover 7. In this solution, on the basis of the first-stage sealing structure and the second-stage sealing structure, the third-stage sealing structure is expanded to the inner and outer rings respectively with the coolant circulation cavity as the middle part, so as to realize multi-stage sealing of the coolant circulation cavity and prevent coolant leakage. The function of the second inner and outer liquid accumulation cavity is the same as that of the first inner and outer liquid accumulation cavity, and the force acting on the third-stage sealing ring is balanced and buffered.

[0035] After the first-stage sealing structure fails, the coolant enters the first inner and outer liquid accumulation chambers. If the second-stage sealing structure does not fail, the coolant will gradually fill the first inner and outer liquid accumulation chambers. After the first inner and outer liquid accumulation chambers are filled with coolant, the pressure in all directions on the entire ring is balanced, so that the pressure at each position of the next-stage sealing structure is the same, that is, the inner and outer liquid accumulation chambers are equivalent to a buffer zone, so that the pressure acting on the next-stage sealing structure is evenly distributed.

[0036] The number of sealing rings is set according to the end face size of the front end cover, and is set to at least the second-stage sealing ring.

[0037] In another technical solution, Figure 1 As shown, the dual-cooling generator further includes a stator 14, which is arranged inside the front end cover 1, and a fixing block 2 is arranged on the inner side wall of the front end cover 1, and the stator 14 is clamped between the fixing block 2 and the rear end cover 1. The fixing block in this technical solution is located on the inner side wall of the front end cover, and is integrally formed with the front end cover, forming a concave stop structure with the front end cover, and the stator is clamped between the concave stop and the rear end cover; the fixing block assists the front end cover to fix the stator inside the front end cover and between the front end cover and the rear end cover.

[0038] In another technical solution, Figure 1 As shown, in the dual-cooled generator, a clamping sleeve 8 is provided between the stator 14 and the rear end cover 7, and a corrugated washer 5 is provided between the clamping sleeve 8 and the stator 14. The function of the corrugated washer is to eliminate the cumulative error after the front and rear end covers are processed and the stator and the clamping sleeve are assembled through its elastic deformation, and the elastic force generated by its deformation is used to clamp the stator.

[0039] In another technical solution, Figure 1 As shown, in the dual-cooled generator, a liquid inlet pipe joint 3 is provided at the liquid inlet on the front cover 1, and a liquid outlet pipe joint 6 is provided at the liquid outlet on the front cover 1. The liquid inlet and outlet pipe joints facilitate the communication between the liquid inlet and outlet pipes and the coolant circulation cavity.

[0040] In another technical solution, Figure 1 As shown, in the dual-cooling generator, the liquid inlet pipe joint 3 and the liquid outlet pipe joint 6 are both pagoda-shaped, and the large-diameter ends of the liquid inlet pipe joint 3 and the liquid outlet pipe joint 6 are both sealed and connected to the front end cover. The liquid inlet pipe joint and the liquid outlet pipe joint are set in a pagoda shape to facilitate pipeline installation and sealing.

[0041] In another technical solution, in the dual-cooled generator, the free end of the liquid inlet pipe joint is connected to a liquid inlet pipe, and a relief valve is provided on the liquid inlet pipe. When the flow path of the coolant is blocked and the system pressure increases, the relief valve can be used to unload the system pressure when the pressure reaches the pressure set by the relief valve to protect the generator body from damage.

[0042] In another technical solution, in the dual-cooling generator, one end of the front cover connected to the rear cover is open. The open end of the front cover is convenient for installation, rotation, disassembly and maintenance of parts such as the stator inside the end cover.

[0043] In another technical solution, Figure 1 and Figure 3 As shown, in the dual-cooling generator, a fixed support plate 9 is arranged outside the front end cover 1. The fixed support plate is used to fix the generator as a whole so that it will not shake easily and be damaged.

[0044] The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be obvious to those skilled in the art.

[0045] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. Double-cooled generator, characterized in that: include: A rotating shaft, on which a rotor claw pole is arranged which can rotate with the rotating shaft, and fan blades are evenly arranged at both ends of the rotor claw pole; A front end cover is sleeved on the outer side of the rotor claw pole and the fan blade, an annular coolant circulation cavity filled with coolant is arranged inside the side wall of the front end cover, a liquid inlet and a liquid outlet are arranged on the side wall of the coolant circulation cavity away from the rotor claw pole, a cavity diaphragm is arranged between the liquid inlet and the liquid outlet in the coolant circulation cavity, a first front end cover inner annular groove and a first front end cover outer annular groove are arranged on one end surface of the front end cover, one end of the coolant circulation cavity is open, and the opening of the coolant circulation cavity is located between the first front end cover inner annular groove and the first front end cover outer annular groove; The cover is provided with a first inner ring protrusion and a first outer ring protrusion which are respectively meshed with the first inner ring groove of the front end cover and the first outer ring groove of the front end cover, and a first inner liquid accumulation cavity is provided at the meshing place of the first inner ring groove of the front end cover and the first inner ring protrusion of the first rear end cover, and a first outer liquid accumulation cavity is provided at the meshing place of the first inner ring groove of the front end cover and the first outer ring protrusion of the first rear end cover, and a first-stage sealing ring is provided at the meshing place of the groove wall between the first inner ring groove of the front end cover and the first outer ring groove of the front end cover and the gap between the first inner ring protrusion of the first rear end cover and the first outer ring protrusion of the first rear end cover; the open end of the cooling liquid circulation cavity is opposite to the first-stage sealing ring, and the groove wall of the first inner ring groove of the front end cover and the first outer ring groove of the front end cover away from the cooling liquid circulation cavity are respectively provided with a second-stage inner sealing ring and a second-stage outer sealing ring; One end of the front cover connected to the rear cover is open; A fixed support plate is arranged on the outer side of the front end cover.

2. The dual-cooling generator according to claim 1, characterized in that: The first front end cover inner annular groove and the first front end cover outer annular groove on the front end cover are respectively provided with a second front end cover inner annular groove and a second front end cover outer annular groove on the open side away from the cooling liquid circulation chamber, and the rear end cover is provided with a second rear end cover inner annular protrusion and a second rear end cover outer annular protrusion respectively meshed with the second front end cover inner annular groove and the second front end cover outer annular groove, a second inner liquid accumulation chamber is provided at the meshing position of the second front end cover inner annular groove and the second rear end cover inner annular protrusion, and a second outer liquid accumulation chamber is provided at the meshing position of the second front end cover outer annular groove and the second rear end cover outer annular protrusion, and a third-stage inner sealing ring and a third-stage outer sealing ring are respectively provided at the meshing position of the second front end cover inner annular groove and the second front end cover outer annular groove away from the groove wall of the cooling liquid circulation chamber and the rear end cover.

3. The dual-cooling generator according to claim 1, characterized in that: It also includes a stator, which is arranged inside the front end cover. A fixing block is arranged on the inner side wall of the front end cover, and the stator is clamped between the fixing block and the rear end cover.

4. The dual-cooling generator according to claim 3, characterized in that: A clamping sleeve is arranged between the stator and the rear end cover, and a corrugated washer is arranged between the clamping sleeve and the stator.

5. The dual-cooling generator according to claim 1, characterized in that: A liquid inlet pipe joint is arranged at the liquid inlet on the front end cover, and a liquid outlet pipe joint is arranged at the liquid outlet on the front end cover.

6. The dual-cooling generator according to claim 5, characterized in that: The liquid inlet pipe joint and the liquid outlet pipe joint are both in a pagoda shape, and the large-diameter ends of the liquid inlet pipe joint and the liquid outlet pipe joint are both sealed and connected to the front end cover.

7. The dual-cooling generator according to claim 6, characterized in that: The free end of the liquid inlet pipe joint is connected with a liquid inlet pipe, and an overflow valve is arranged on the liquid inlet pipe.

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