Marine shaft electric excitation generator cooling system

Abstract

The utility model provides a marine shaft electric excitation generator cooling system, which belongs to the technical field of generators, and comprises a shell, a stator, a rotor support and a rotor magnetic pole, the outer side of the shell is sleeved with a cooling sleeve, and a cooling medium is contained in the cooling sleeve; a V-shaped air channel is formed between every two adjacent rotor magnetic poles, an air inlet and a fan are arranged on the shell, and the air inlet and the fan are located on the two axial sides of the rotor respectively. According to the marine shaft electric excitation generator cooling system provided by the utility model, the stator is cooled by the cooling medium in the cooling sleeve, and under the action of the fan, external air enters the housing through the air inlet, then passes through the V-shaped air channel between the two rotor magnetic poles, and finally is discharged from the housing through the fan, so that the cooling effect of the marine shaft electric excitation generator is improved. When air passes through the V-shaped air channel, the rotor magnetic pole and the stator are cooled.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of generator, more specifically, relate to a marine shaft electric excitation generator cooling system. BACKGROUND

[0002] The marine shaft generator is directly driven by the main shaft of the ship to generate electricity, has the advantages of energy saving and high integration, and is widely used in ship hybrid power systems. The electric excitation generator occupies an important position in the ship power system due to its controllable excitation current and superior voltage regulation performance. However, in the marine environment, the stator and rotor of the electric excitation generator will heat up at the same time. In order to reduce the temperature of the electric excitation generator, the traditional way is to set up heat dissipation fins on the shell of the electric excitation generator, but the heat dissipation effect is not good, which cannot meet the heat dissipation demand. SUMMARY

[0003] The utility model discloses a marine shaft electric excitation generator cooling system, which aims to solve the problem of poor heat dissipation effect of the existing marine shaft electric excitation generator, which cannot meet the heat dissipation demand.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of providing a marine shaft electric excitation generator cooling system, which comprises: a shell, a stator, a rotor support and a rotor magnetic pole. The rotor support is fixedly installed on the ship stern shaft, and the rotor magnetic poles are evenly arranged along the outer circumference of the rotor support. The shell is characterized in that a cooling jacket is sleeved on the outer side of the shell, the cooling jacket is coaxial with the stator, and the cooling jacket contains cooling medium. A V-shaped air duct is formed between adjacent two rotor magnetic poles, an air inlet and a fan are arranged on the shell, and the air inlet and the fan are located on the two sides of the rotor shaft.

[0005] In one possible implementation, a dustproof grille is installed at the air inlet.

[0006] In one possible implementation, the cooling medium is cooling water.

[0007] In one possible implementation, a water inlet and a water outlet are arranged on the cooling jacket, and the water inlet is communicated with the ship central cooling water system.

[0008] In one possible implementation, the inner cavity of the cooling jacket is a reciprocating water channel.

[0009] In one possible implementation, the cooling jacket is made of stainless steel.

[0010] In a possible implementation, the cooling system further comprises a collector ring and a brush; the collector ring is fixedly installed on the ship shaft and located inside the shell, and the brush is fixedly installed on the shell and in sliding fit with the collector ring, and the air inlet end of the fan is opposite to the brush.

[0011] In a possible implementation, the cooling system further comprises a pressing disc and a tension sleeve; the pressing disc and the tension sleeve are sleeved on the ship shaft, the rotor support is in gap fit with the ship shaft, an accommodating groove for accommodating the tension sleeve is formed in the outer side wall of the rotor support in the axial direction, the pressing disc is located outside the rotor support and connected with the rotor support through fasteners, and the pressing disc applies an axial force to the tension sleeve towards the rotor support.

[0012] In a possible implementation, the tension sleeve comprises an inner sleeve and an outer sleeve, and the inner sleeve and the outer sleeve are coaxially arranged and have a conical fit surface.

[0013] In a possible implementation, the inside of the shell is provided with a temperature and humidity sensor.

[0014] Compared with the prior art, the ship shaft electrically excited generator cooling system has the advantages that: the cooling medium in the cooling jacket cools the stator, and under the action of the fan, the air outside enters the shell through the air inlet, then passes through the V-shaped air duct between the two rotor magnetic poles, and finally is discharged from the shell through the fan, and the air is cooled to the rotor magnetic poles and the stator in the process of passing through the V-shaped air duct. The motor cooling system of the application cools the stator and the rotor by setting the cooling jacket and the fan, thereby improving the cooling effect and meeting the cooling demand. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0016] Figure 1 A perspective structural schematic view of the ship shaft electrically excited generator cooling system according to the embodiments of the present application is provided.

[0017] Figure 2 A rear view of the ship shaft electrically excited generator cooling system according to the embodiments of the present application is provided.

[0018] Figure 3The utility model provides a kind of ship shaft electric excitation generator cooling system's section view for the utility model embodiment provides;

[0019] Figure 4 The utility model provides a kind of ship shaft and rotor assembly structure schematic diagram for the utility model embodiment provides;

[0020] Figure 5 For Figure 4 Sectional view along A-A line;

[0021] Figure 6 For Figure 5 Enlarged view of B.

[0022] In the drawing: 1, shell;101, cooling jacket;102, air inlet;103, fan;104, dustproof grid;105, water inlet;106, water outlet;107, current collector ring;108, brush;109, pressure disc;110, expansion sleeve;111, fastener;112, inner sleeve;113, outer sleeve;114, temperature and humidity sensor;2, stator;3, rotor support;4, rotor magnetic pole;401, V-shaped air duct;5, ship shaft. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical schemes and beneficial effects to be solved by the utility model more clear and obvious, the utility model is further described in detail in the following in combination with drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0024] Please see Figures 1 to 4 Now a kind of ship shaft electric excitation generator cooling system provided by the utility model will be described. The kind of ship shaft electric excitation generator cooling system, including: shell 1, stator 2, rotor support 3 and rotor magnetic pole 4, rotor support 3 is fixedly installed on ship shaft 5, and rotor magnetic pole 4 is evenly arranged along the outer circumference of rotor support 3;Its characterized in that, the outside of shell 1 is sleeved with cooling jacket 101, cooling jacket 101 is coaxial with stator 2, and cooling jacket 101 is filled with cooling medium;V-shaped air duct 401 is formed between adjacent two rotor magnetic poles 4, air inlet 102 and fan 103 are respectively provided on shell 1, and air inlet 102 and fan 103 are respectively located on the two sides of rotor axial direction.

[0025] Compared with the prior art, the cooling medium in the cooling jacket 101 cools the stator 2, and under the action of the fan 103, external air enters the shell 1 through the air inlet 102, then passes through the V-shaped air duct 401 between the two rotor magnetic poles 4, and finally is discharged from the shell 1 through the fan 103. The air is cooled to the rotor magnetic poles 4 and the stator 2 in the process of passing through the V-shaped air duct 401. The motor cooling system of the application cools the stator 2 and the rotor by setting the cooling jacket 101 and the fan 103, thereby improving the cooling effect and meeting the cooling demand.

[0026] When the ship is running, air enters the shell 1 through the air inlet 102, and the fan 103 starts to work to flow the air along the axial direction of the ship stern shaft 5. The air fully contacts the stator 2 and the rotor in the flowing process, and carries away the heat generated in the running process. Since the V-shaped air duct is formed between the two adjacent rotor magnetic poles 4, the air flows more smoothly in the air duct, further improving the cooling effect. This structure design not only ensures the normal operation of the ship propulsion system, but also prolongs the service life and improves the operation efficiency of the ship. The rotor support 3 and the rotor magnetic pole 4 constitute the rotor of the generator.

[0027] In some embodiments, referring to Figure 2 , a dustproof grille 104 is installed at the air inlet 102. In this embodiment, the dustproof grille 104 can effectively prevent dust and other foreign matters from entering the shell 1, thereby protecting the stator 2 and the rotor and prolonging the service life of the generator.

[0028] In addition, the dustproof grille 104 has a delicate design structure. The fine mesh structure can effectively block dust and other foreign matters, and will not cause too much influence on the flow and speed of the air inlet, ensuring that the generator can continuously obtain sufficient air supply during normal operation to maintain its high-efficiency power generation performance. Moreover, the dustproof grille 104 is easy to clean and maintain, and regular cleaning can ensure that it always maintains good dustproof effect, further providing reliable guarantee for the stable operation of the generator.

[0029] In some embodiments, the cooling medium is cooling water. In this embodiment, the cooling water is the most easily obtained cooling medium on the ship, so the equipment cost can be greatly reduced.

[0030] The cooling water is relatively easy to obtain, and no additional investment is needed to purchase special cooling medium. Only by using the ship's own water circulation system, the cooling medium can be continuously provided. This not only saves the purchase cost, but also ensures the normal operation of the cooling system at any time during the operation of the ship, so that the running stability and reliability of the ship are improved. At the same time, the temperature of the cooling water can be adjusted according to the running state of the ship and the environmental conditions to meet the cooling temperature requirements of different equipment, further optimizing the running performance of the equipment.

[0031] In some embodiments, referring to Figure 2 , the cooling jacket 101 is provided with a water inlet 105 and a water outlet 106, and the water inlet 105 is communicated with the ship central cooling water system. In this embodiment, the ship central cooling water system is communicated with the water inlet 105, so that the cooling water can be continuously supplied into the cooling jacket 101, and the cooling water is discharged from the water outlet 106 after heat exchange with the stator 2, so as to realize the water circulation in the cooling jacket 101 and improve the heat dissipation effect.

[0032] By setting the water inlet 105 and the water outlet 106 and making the ship central cooling water system communicated with the water inlet 105, the design ingeniously utilizes the cooling system of the ship to provide stable and continuous cooling water supply for the cooling jacket 101. The cooling water is smoothly discharged from the water outlet 106 after fully heat exchanging with the stator 2 in the cooling jacket 101, forming an efficient water circulation process. This not only effectively reduces the temperature of the stator 2, avoids equipment failure and performance decline caused by overheating, but also improves the heat dissipation effect of the entire cooling system, ensuring that the ship can maintain good running state under various working conditions. At the same time, this design is convenient for maintenance and management, and the flow and temperature of the cooling water can be adjusted at any time to meet different cooling requirements, further improving the reliability and stability of the cooling system.

[0033] In some embodiments, the inner cavity of the cooling jacket 101 is a reciprocating water channel. In this embodiment, the inner cavity of the cooling jacket 101 adopts a reciprocating water channel, which can prolong the heat exchange area of the cooling water with the stator 2, thereby improving the heat exchange effect.

[0034] The design of the reciprocating water channel enables the cooling water to contact and exchange heat with the stator 2 multiple times in the cooling jacket 101. The cooling water flows back and forth in the water channel, shuttling between the stators 2 and continuously taking away the heat generated by the stators 2. In this way, the temperature of the stator 2 is effectively reduced, avoiding equipment failure and performance decline caused by overheating. At the same time, although the structure of the reciprocating water channel is relatively complex, the improvement of the heat exchange effect brought by it is significant, providing a strong guarantee for the stable operation and efficient work of the equipment.

[0035] In some embodiments, the cooling jacket 101 is made of stainless steel. In this embodiment, the stainless steel has good corrosion resistance and can work stably in various complex environments for a long time without being easily corroded and damaged, thereby effectively ensuring the normal operation and service life of the equipment. The good corrosion resistance also makes the cooling jacket 101 not need to be replaced frequently, saving maintenance cost and time and providing strong support for the production and operation of the enterprise. In addition, the stainless steel also has excellent heat conduction performance, which can quickly transfer heat away and improve the cooling efficiency to meet the cooling requirements under different working conditions.

[0036] In some embodiments, referring to Figure 3 , the current collector ring 107 is fixedly installed on the ship stern shaft 5 and located inside the shell 1, the brush 108 is fixedly installed on the shell 1 and in sliding fit with the current collector ring 107, and the air inlet end of the fan 103 is opposite to the brush 108. In this embodiment, carbon powder is generated during the working process of the current collector ring 107 and the brush 108, which diffuses into the entire shell 1, thereby affecting the working performance of the stator 2 and the rotor. Since the air inlet end of the fan 103 is opposite to the brush 108, the carbon powder generated by the brush 108 directly enters the fan 103, thereby being discharged from the shell 1 and ensuring the normal working of the generator.

[0037] In some embodiments, referring to Figure 5 and Figure 6 , the pressure plate 109 and the expansion sleeve 110 are sleeved on the ship stern shaft 5, the rotor support 3 is in clearance fit with the ship stern shaft 5, the rotor support 3 has an accommodating groove on the outer side wall in the axial direction for accommodating the expansion sleeve 110, the pressure plate 109 is located outside the rotor support 3 and connected with the rotor support 3 through the fastener 111, and the pressure plate 109 applies an axial force to the expansion sleeve 110 towards the rotor support 3. In this embodiment, the pressure plate 109 and the expansion sleeve 110 are sleeved on the ship stern shaft 5. The expansion sleeve 110 is made of rubber and can be elastically deformed. The expansion sleeve 110 is located in the accommodating cavity of the rotor support 3, and the pressure plate 109 is located outside the rotor support 3. The fastener 111 is a screw. The screw is parallel to the axial direction of the rotor support 3. When the screw is tightened, the pressure plate 109 gradually approaches the expansion sleeve 110 and applies an axial force to the expansion sleeve 110 towards the rotor support 3. The expansion sleeve 110 is elastically deformed under the action of the pressure plate 109, thereby expanding the rotor support 3 and the ship stern shaft 5, and finally realizing the fixed connection between the rotor support 3 and the ship stern shaft 5.

[0038] However, over a long period of operation, the rubber material of the expansion sleeve 110 may age. Over time, the elastic properties of the expansion sleeve 110 will gradually decrease, which can result in insufficient expansion force on the rotor support 3 and the ship stern shaft 5. To solve this problem, the expansion sleeve 110 needs to be regularly inspected and maintained. Regularly check the appearance of the expansion sleeve 110 for cracks, wear and tear, etc., and replace it in a timely manner if problems are found. At the same time, the expansion sleeve 110 can also be tested for elasticity to ensure that it can provide sufficient expansion force in the working state. In addition, in order to improve the service life of the expansion sleeve 110, attention should be paid to the selection of the appropriate screw size and tightening force during installation to avoid damage to the expansion sleeve 110 due to over-tightening or over-loosening of the screw. In daily maintenance, the ship stern shaft 5 should also be kept clean to prevent impurities from entering the expansion sleeve 110 and affecting its working performance. Through the above measures, the service life of the expansion sleeve 110 can be effectively extended, ensuring the stable and reliable connection between the rotor support 3 and the ship stern shaft 5.

[0039] In some embodiments, referring to Figure 5 and Figure 6 , the expansion sleeve 110 includes an inner sleeve 112 and an outer sleeve 113, which are coaxially arranged and have a conical mating surface. In this embodiment, the inner diameter of the inner sleeve 112 matches the outer diameter of the ship stern shaft 5, and the outer diameter of the outer sleeve 113 matches the outer contour of the receiving cavity. The inner sleeve 112 and the outer sleeve 113 are coaxially arranged, and the outer sleeve 113 has a conical mating surface with the inner sleeve 112. The pressure plate 109 is in contact with the outer end surface of the outer sleeve 113. When the locking fastener 111 is tightened, the pressure plate 109 moves towards the outer sleeve 113, thereby exerting an axial force on the outer sleeve 113 towards the rotor support 3. Since the mating surface of the inner sleeve 112 and the outer sleeve 113 is conical, the outer sleeve 113 and the inner sleeve 112 will elastically deform under the action of external force, and at the same time, the outer sleeve 113 will displace relative to the inner sleeve 112. Under the premise of ensuring the expansion of the rotor support 3 and the ship stern shaft 5, the required applied force can be reduced.

[0040] With the continuous action of the locking fastener 111, the pressing disc 109 continuously pushes to the side close to the outer sleeve 113, and the axial force of the outer sleeve 113 to the rotor support 3 gradually increases. At this time, the conical surface cooperation between the inner sleeve 112 and the outer sleeve 113 is more closely, and the elastic deformation of the two is more obvious. The outer sleeve 113 stably changes the displacement under the driving of the elastic deformation along the conical surface of the inner sleeve 112, and the displacement changes make the inner sleeve 112 tightly fit on the outer surface of the ship stern shaft 5 and the outer sleeve 113 tightly fit on the inner contour of the accommodating cavity, so as to realize the reliable expansion of the rotor support 3 and the ship stern shaft 5. In the whole process, due to the characteristics of the conical surface cooperation, the required applied force can be effectively reduced, which not only ensures the effect of expansion, but also reduces the operation difficulty and equipment loss, and provides more stable and reliable power transmission conditions for the operation of the ship.

[0041] In some embodiments, referring to Figure 3 , the inside of the shell 1 is provided with a temperature and humidity sensor 114. In this embodiment, the temperature and humidity sensor 114 can monitor the temperature and humidity inside the shell 1 in real time. According to the change of the temperature and humidity inside the shell 1, the flow of cooling water and the rotating speed of the fan 103 are controlled.

[0042] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cooling system for a marine shaft generator, comprising: The shell, stator, rotor support and rotor magnetic pole are characterized in that the outside of the shell is sleeved with a cooling jacket, the cooling jacket is coaxial with the stator, and the cooling jacket contains cooling medium; V-shaped air ducts are formed between adjacent two rotor magnetic poles, and the shell is respectively provided with an air inlet and a fan, and the air inlet and the fan are respectively located on the two sides of the rotor in the axial direction.

2. A cooling system for an electrically excited generator of the shaft generator type according to claim 1, characterised in that A dustproof grid is arranged at the air inlet.

3. A cooling system for an electrically excited generator of the shaft generator type according to claim 1, characterized in that The cooling medium is cooling water.

4. A cooling system for an electrically excited generator of the shaft generator type according to claim 3, characterised in that The cooling jacket is provided with a water inlet and a water outlet, and the water inlet is communicated with a central cooling water system of the ship.

5. A cooling system for an electrically excited generator of the shaft generator type according to claim 4, characterised in that The inner cavity of the cooling jacket is a reciprocating water channel.

6. A cooling system for an electrically excited generator of the shaft generator type according to claim 1, characterized in that The cooling jacket is made of stainless steel.

7. A cooling system for an electrically excited generator of the shaft generator type according to claim 1, characterized in that A slip ring and a brush are further included, the slip ring is fixedly installed on the ship shaft and located inside the shell, the brush is fixedly installed on the shell and in sliding cooperation with the slip ring, and the air inlet end of the fan is opposite to the brush.

8. A cooling system for an electrically excited generator of the shaft generator type according to claim 1, characterized in that A press plate and an expansion sleeve are further included, the press plate and the expansion sleeve are both sleeved on the ship shaft, the rotor support is in clearance fit with the ship shaft, an accommodating groove for accommodating the expansion sleeve is formed on the outer side wall of the rotor support in the axial direction, the press plate is located outside the rotor support and connected with the rotor support through fasteners, and the press plate applies an axial force to the expansion sleeve towards the rotor support.

9. A cooling system for an electrically excited generator of the shaft generator type according to claim 8, characterised in that The expansion sleeve includes an inner sleeve and an outer sleeve, and the inner sleeve and the outer sleeve are coaxially arranged and have a conical matching surface.

10. A cooling system for an electrically excited generator of the shaft generator type according to claim 1, characterized in that A temperature and humidity sensor is installed inside the shell.

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