Synchronous generator motor with improved rotor cooling

Abstract

The present invention relates to a synchronous generator motor that improves the cooling of a rotor, comprising: a rotating shaft (160); a rotor part (120) coupled to the rotating shaft (160); a frame (150); a stator core stacking part (140) located inside the frame (150); a stator coil (170) penetrating the stator core stacking part (140); and a reflector (110) installed at the bottom of the rotor part (120), wherein a plurality of holes (111) are formed in a circular shape at predetermined intervals in the reflector (110). In an embodiment of the present invention, a plurality of air intake holes are formed in the reflector at the bottom of the rotor, and a cooling duct is added to the rotor part to sufficiently cool the upper coil end portion, thereby improving cooling efficiency and extending lifespan, thereby improving non-uniform cooling.

Description

Technology Field

[0001] The present invention relates to a synchronous generator motor that improves rotor cooling, and more specifically, to a synchronous generator motor that improves rotor cooling by forming a plurality of air intake holes in a reflector at the bottom of the rotor and adding a cooling duct to the rotor portion to improve cooling efficiency. Background Technology

[0002] The following description merely provides background information related to the present invention and does not constitute prior art.

[0003] Generally, pumped-storage power generation is a method of generating electricity by pumping water from a lower reservoir to an upper reservoir during off-peak hours and weekends when electricity prices are low, and then releasing the water during the day and weekdays when electricity consumption increases.

[0004] Pumped storage power generation is widely utilized as a standby and alternative reserve resource because it has excellent starting characteristics and requires no special standby costs.

[0005] In addition, it has the advantage of compensating for the output variability of renewable energy sources, such as wind and solar power, which are affected by weather.

[0006] Globally, the proportion of new and renewable energy is increasing to address the depletion of fossil fuels and rapid climate change, and accordingly, the share of pumped-storage power is also on the rise.

[0007] The rotor used in the generator motor of a pumped storage power plant may be provided with multiple rotor poles. In this case, the rotor poles typically consist of 24 poles.

[0008] Referring to Fig. 1, conventionally, air (A) introduced through the inlet is divided into Bo and c and rises to the top.

[0009] At this time, Bo rises through the duct inside the frame (150), and c rises between the frame (150) and the stator core (140).

[0010] Then, the air (Bo) flowing through the duct is distributed and passes through the ducts (e1~e7) between the top of the duct and the stator core (140).

[0011] Afterwards, the air (d) that has passed through both the air (b1) at the top of the duct and the stator core (140) passes through the end of the stator coil (170) at the bottom of the blocking plate (130) and exits to the outlet.

[0012] However, the upper stator coil (170) end is the place where the most heat is generated, so it is not sufficiently cooled.

[0013] Therefore, it is necessary to provide sufficient cooling to the upper end portion of the stator coil (170). The problem to be solved

[0014] The problem that the present invention aims to solve is to provide a synchronous generator motor that improves rotor cooling by forming a plurality of air intake holes in the reflector at the bottom of the rotor and adding a cooling duct to the rotor section to sufficiently cool the upper coil end section, thereby improving cooling efficiency and extending lifespan. means of solving the problem

[0015] A synchronous generator motor that improves rotor cooling according to the features of the present invention for solving these problems,

[0016] Rotation axis (160);

[0017] A rotor part (120) coupled to the above-mentioned rotation axis (160);

[0018] Frame(150);

[0019] A stator core stacking section (140) located inside the above frame (150);

[0020] A stator coil (170) penetrating the stator core stacking portion (140) above;

[0021] It includes a reflector (110) installed at the lower part of the rotor (120), and

[0022] In the above reflector (110), a plurality of holes (111) are formed in a circular shape at predetermined intervals.

[0023] The holes (111) formed in the above refractor are formed in 10 to 14 numbers, and preferably 12 numbers, which is advantageous for air inflow from the bottom.

[0024] In the rotor section (120), a plurality of cooling channels are formed in the direction from the rotation axis (160) to the stator core stacking section (140).

[0025] The cooling channel formed in the rotor part (120) corresponds to the cooling channel formed in the stator core stacking part, allowing air to flow smoothly.

[0026] A synchronous generator motor that improves rotor cooling according to the features of the present invention for solving these problems,

[0027] Rotation axis (160);

[0028] A rotor part (120) coupled to the above-mentioned rotation axis (160);

[0029] Frame(150);

[0030] A stator core stacking section (140) located inside the above frame (150);

[0031] A stator coil (170) penetrating the stator core stacking portion (140) above;

[0032] It includes a reflector (110) installed at the lower part of the rotor (120), and

[0033] In the rotor section (120), a plurality of cooling channels are formed radially from the rotation axis (160) toward the stator core stacking section (140). Effects of the invention

[0034] In an embodiment of the present invention, a plurality of air intake holes are formed in the reflector at the bottom of the rotor, and a cooling duct is added to the rotor part to sufficiently cool the upper coil end part, thereby improving cooling efficiency and extending lifespan, and non-uniform cooling can be improved. Brief explanation of the drawing

[0035] Figure 1 is a diagram showing the cooling flow of a typical synchronous generator motor. FIG. 2 is a diagram showing the cooling flow of a synchronous generator motor that improves the cooling of the rotor according to an embodiment of the present invention. FIGS. 3 to 5 are drawings showing a reflector applied to a synchronous generator motor that improves the cooling of a rotor according to an embodiment of the present invention. FIG. 6 is a drawing showing a rotor portion applied to a synchronous generator motor that improves the cooling of the rotor according to an embodiment of the present invention. FIG. 7 is a diagram showing the pressure and flow velocity of air passing through the holes of a reflector applied to a synchronous generator motor that improves the cooling of the rotor according to an embodiment of the present invention. Specific details for implementing the invention

[0036] Embodiments of the present invention are described below with reference to the attached drawings so that those skilled in the art can easily implement them. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification are denoted by similar reference numerals.

[0037] Throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0038] FIG. 2 is a diagram showing the cooling flow of a synchronous generator motor that improves the cooling of a rotor according to an embodiment of the present invention, FIG. 3 to 5 are diagrams showing a reflector applied to a synchronous generator motor that improves the cooling of a rotor according to an embodiment of the present invention, FIG. 6 is a diagram showing a rotor part applied to a synchronous generator motor that improves the cooling of a rotor according to an embodiment of the present invention, and FIG. 7 is a diagram showing the pressure and flow velocity of air passing through the holes of a reflector applied to a synchronous generator motor that improves the cooling of a rotor according to an embodiment of the present invention.

[0039] Referring to FIGS. 1 to 6, a synchronous generator motor that improves rotor cooling according to an embodiment of the present invention is,

[0040] Rotation axis (160);

[0041] A rotor part (120) coupled to the above-mentioned rotation axis (160);

[0042] Frame(150);

[0043] A stator core stacking section (140) located inside the above frame (150);

[0044] A stator coil (170) penetrating the stator core stacking portion (140) above;

[0045] It includes a reflector (110) installed at the lower part of the rotor (120), and

[0046] In the above reflector (110), a plurality of holes (111) are formed in a circular shape at predetermined intervals.

[0047] The holes (111) formed in the above refractor are formed in 10 to 14 numbers, and preferably 12 numbers are formed, which is advantageous for air inflow from the bottom.

[0048] In the rotor portion (120), a plurality of cooling channels (i1 to i7) are formed in the direction from the rotation axis (160) to the stator core stacking portion (140).

[0049] The cooling channels (i1~i7) formed in the rotor section (120) correspond to the cooling channels (e1~e7) formed in the stator core stacking section (140) to allow air to flow smoothly.

[0050] The cooling operation of a synchronous generator motor that improves the cooling of a rotor according to the features of the present invention having such a configuration is described as follows.

[0051] Referring to Fig. 2, in the present invention as in the prior art, air (A) introduced through the inlet is divided into Bo and c and rises upward.

[0052] At this time, Bo rises through the duct inside the frame (150), and c rises between the frame (150) and the stator core stacking section (140).

[0053] Then, the air (Bo) flowing through the duct is distributed and passes between the upper part of the duct and the stator core stack (140) (e1~e7).

[0054] At this time, the air (d) that has passed through the air (b1) at the top of the duct and the stator core stacking section (140) passes through the coil end of the stator coil (170) at the top of the blocking plate (130) and exits to the outlet.

[0055] Meanwhile, in the present invention, when the rotor (120) rotates, air (J) is rapidly sucked in from the lower part of the plurality of holes (111) formed in the reflector (110) and exits through the upper part of the reflector (110).

[0056] Referring to FIG. 7, air flowing in from the multiple holes (111) of the reflector (110) moves slowly, but as the cooling passage narrows toward the top, the air is quickly expelled.

[0057] Accordingly, the rapidly escaping air is supplied in the direction of the upper direction of the rotation shaft (160) and the direction of the cooling path of the rotor part (120).

[0058] That is, air (f, g) passing through the upper part of the reflector (110) flows through a plurality of cooling channels (i1~i7) formed in the rotor part (120).

[0059] Additionally, the air (h) passing through the upper part of the reflector (110) flows upward along the axis and then passes through the coil end of the stator coil (170) at the lower part of the locking disc (130) and exits to the outlet.

[0060] In this way, in an embodiment of the present invention, a plurality of air intake holes (111) are formed in the reflector (110) at the bottom of the rotor, and a cooling duct is added to the rotor part (120) to sufficiently cool the coil end portion at the top of the stator coil (170), thereby improving cooling efficiency and extending the lifespan of the synchronous generator motor.

[0061] Although embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims also fall within the scope of the present invention.

Claims

Claim 1 In a synchronous generator motor in which an outlet is installed on the upper side of a blocking disc (130), the motor comprises: a rotating shaft (160); a rotor (120) coupled to the rotating shaft (160); a frame (150); a stator core stacking section (140) located inside the frame (150); a stator coil (170) penetrating the stator core stacking section (140); and a reflector (110) installed below the rotor (120), wherein a plurality of holes (111) are formed in a circular shape at predetermined intervals in the reflector (110), and 10 to 14 holes (111) are formed in the reflector, and a plurality of cooling passages are formed in the rotor (120) in the direction from the rotating shaft (160) to the stator core stacking section (140), and the cooling passages formed in the rotor (120) correspond to the cooling passages formed in the stator core stacking section so as to allow air to flow smoothly. However, the air introduced from the multiple holes (111) of the reflector (110) moves slowly, but as the cooling passage narrows toward the top, the air escapes quickly, and accordingly, the air escaping quickly is supplied toward the upper direction of the rotating shaft (160) and the cooling passage of the rotor part (120), and the air (h) passing through the upper part of the reflector (110) flows along the rotating shaft toward the upper part of the rotating shaft, then passes through the coil end of the stator coil (170) at the lower part of the blocking disc (130) and escapes through the outlet at the upper part of the blocking disc (130), thereby improving the cooling of the rotor, a synchronous generator motor. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete

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