A novel motor sealed chamber facilitating oil discharge

Abstract

The utility model discloses a novel motor sealed chamber convenient to oil discharge, including the motor stator rotor chamber of being located in the middle position of bearing motor, motor stator rotor chamber both ends are equipped with the motor body internal support framework, and the motor body internal support framework is the plate -shaped structure of vertical arrangement, and the board center is equipped with the round hole, the motor body internal support framework is installed with the insulating resin baffle through a plurality of fasteners on the side away from motor stator rotor chamber, and the insulating resin baffle is cooperated with the motor inner wall and is formed in the independent oil discharge chamber in motor stator rotor chamber both ends, and the motor rotates the main shaft and penetrates the insulating resin baffle, and the motor bearing communicates with corresponding oil discharge chamber respectively, the bottom of oil discharge chamber all is equipped with the oil discharge slope, and the lowest end of oil discharge slope is equipped with the discharge gate, and the discharge gate is equipped with the chamber oil discharge valve, and the oil that is thrown out in the motor bearing only enters the independent oil discharge chamber, and the oil dirt is discharged along the slope from the oil discharge valve place of chamber discharge gate automatically.

Description

Technical Field

[0001] This utility model relates to the technical field of power generation equipment related devices, and in particular to a novel sealed chamber for electric motors that facilitates oil drainage. Background Technology

[0002] The existing bearing motor includes a motor stator and rotor chamber located in the middle of the bearing motor for installing the stator and rotor. The motor stator and rotor chamber has internal support frames at both ends of the motor body. The internal support frames of the motor body are vertically arranged plate structures to strengthen the internal support of the motor. The center of the plate has a round hole to facilitate the installation and maintenance of the stator and rotor.

[0003] Currently, motors with a power of 900 kilowatts or more generally use bearing bushes for lubrication. However, the main drawbacks of current bearing bush lubrication are that the larger the power, the larger the bearing bush, and the longer the suction effect and oil groove of the motor rotation, the greater the probability of lubricating oil overflowing from the edge of the bearing bush. In addition, for forced lubrication bearing bushes, the lubricating oil itself has a certain pressure. When the shaft is running, the oil will generate air bubbles, which will generate a certain pressure. When the motor is running, the fan will generate a certain negative pressure, which will increase the pressure difference between the inside and outside of the oil chamber, leading to oil leakage.

[0004] Many motors using bearing bushes require regular cleaning of accumulated oil at the bottom of the motor. Some of this oil evaporates and is then splashed onto the stator coils by the rotor's fan, causing oil stains to accumulate on the stator coils. Over time, this can lead to stator insulation failure and serious electrical accidents. Oil accumulation is a common problem in motors using bearing bushes and urgently needs to be addressed to reduce motor malfunctions caused by internal oil buildup, and even more serious issues such as high-voltage power line tripping and severe social impact.

[0005] Meanwhile, staff are required to regularly check and clean the oil stains inside the motors, and periodically return the motors to the factory for oil stain treatment. The workload is very large, and the psychological pressure on the staff is also relatively high if equipment failure occurs due to failure to check or clean the oil stains in time. Utility Model Content

[0006] This invention provides a novel sealed chamber for electric motors that facilitates oil drainage, aiming to solve the problems mentioned above regarding oil leakage and oil accumulation affecting stator insulation in existing bearing motors, as well as the need for regular cleaning of oil stains.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A novel sealed chamber for easy oil drainage in an electric motor includes a stator and rotor chamber located in the middle of the motor bearing. Internal support frames for the motor body are located at both ends of the stator and rotor chamber. These internal support frames are vertically arranged plate-like structures with a central hole. Insulating resin baffles are installed on the side of the internal support frames away from the stator and rotor chamber via several fasteners. These baffles cooperate with the inner wall of the motor to form independent oil drainage chambers at both ends of the stator and rotor chamber. The motor shaft passes through the insulating resin baffles, and the motor bearings are connected to their respective oil drainage chambers. Each oil drainage chamber has a drainage slope at its bottom, with a discharge port at the lowest point of the slope and a chamber oil drainage valve at the discharge port.

[0009] Preferably, the oil drain chamber is arranged symmetrically with respect to the stator and rotor chambers of the motor.

[0010] More preferably, a motor bearing end cover is installed on the motor side wall away from the motor stator and rotor chamber of the oil discharge chamber, and a motor bearing bush is installed on the motor bearing end cover. The motor main shaft passes through the motor bearing bush and then through the insulating resin baffle to enter the motor stator and rotor chamber.

[0011] Furthermore, the insulating resin baffle is composed of two half-baffles spliced ​​together. The half-baffles are symmetrically arranged with respect to the circular holes of the internal support frame of the motor body, and the insulating resin baffles completely cover the internal support frame of the motor body. The top and bottom of the half-baffles are installed on the internal support frame of the motor body by fasteners.

[0012] Furthermore, the half-baffle has a reserved semi-circular hole on the side near the motor spindle. After the two half-baffles are combined to form a complete insulating resin baffle, the reserved semi-circular hole forms a complete reserved hole, through which the motor spindle passes concentrically and coaxially.

[0013] Specifically, the side of each half-baffle near the motor spindle is provided with a rubber seal. After the two half-baffles are combined to form a complete insulating resin baffle, the half-baffles are sealed together by the rubber seal, and the complete reserved hole is sealed together with the motor spindle by the rubber seal.

[0014] More specifically, the fasteners at the top and bottom of the half-baffle are symmetrical about the middle position of the half-baffle, and there are no fewer than two fasteners at the top.

[0015] In detail, the fastener is a fixing bolt, the stud of the fixing bolt passes through both the half baffle and the internal support frame of the motor body, and the two ends are threaded with fixing nuts to clamp the half baffle and the internal support frame of the motor body.

[0016] More preferably, the oil drain slope is sealed to the inner wall of the oil drain chamber by a sealing gasket.

[0017] Furthermore, the surface of the oil draining slope is smooth, and the oil flows into the discharge port along the oil draining slope by gravity.

[0018] The beneficial effects of this utility model are:

[0019] 1. A simple and reliable partition is formed inside the generator by an insulating resin baffle. This partition separates the stator and rotor chamber of the motor from the bearing side chamber. The bearing side chamber forms a relatively independent oil draining chamber by the insulating resin baffle, which collects the oil that leaks into the motor from the motor bearing independently, so that it does not enter the stator and rotor chamber of the motor and damage the stator insulation.

[0020] 2. The oil entering the oil draining chamber is guided to the discharge port through the oil draining slope and automatically drained out through the chamber oil draining valve, which avoids the oil accumulating inside the motor and contaminating the motor rotor and stator coils. Many motors using bearing bushes need to have the oil accumulated at the bottom of the motor cleaned regularly. After the oil evaporates, it is thrown onto the motor stator coils by the motor rotor fan, thereby avoiding damage to the stator insulation.

[0021] 3. It does not damage the original structure of the motor, is easy to install, convenient to use, and has good performance. Attached Figure Description

[0022] Figure 1 This is a side view of the motor of this utility model;

[0023] Figure 2 These are schematic diagrams of both sides of the oil drain chamber of the motor according to this utility model;

[0024] Figure 3 This is a schematic diagram of the installation of the insulating resin baffle of this utility model on the side near the oil drain chamber;

[0025] Figure 4 This is a schematic diagram showing the installation of the insulating numerical baffle of this utility model on the side away from the oil drain chamber;

[0026] In the diagram: 1. Oil drain chamber; 2. Internal support frame of the motor body; 3. Fixing bolts; 4. Oil drain valve of the chamber; 5. Insulating resin baffle; 6. Motor spindle; 7. Motor bearing shell; 8. Motor bearing end cover; 9. Oil drain slope; 10. Stator and rotor chamber of the motor; 11. Rubber seal. Detailed Implementation

[0027] The embodiments will be further described below with reference to the accompanying drawings.

[0028] like Figures 1-4As shown in the preferred embodiment 1, a novel motor sealing chamber for easy oil drainage includes a motor stator and rotor chamber 10 located in the middle of the motor bearing. The motor stator and rotor chamber 10 has internal motor body support frames 2 at both ends. The internal motor body support frames 2 are vertically arranged plate structures with a circular hole at the center. Insulating resin baffles 5 are installed on the side of the internal motor body support frames 2 away from the motor stator and rotor chamber 10 via several fasteners. The insulating resin baffles 5 cooperate with the inner wall of the motor to form independent oil drainage chambers 1 at both ends of the motor stator and rotor chamber 10. The motor main shaft 6 passes through the insulating resin baffles 5, and the motor bearings 7 are respectively connected to the corresponding oil drainage chambers 1. Each oil drainage chamber 1 has an oil drainage slope 9 at its bottom, with a discharge port at the lowest end of the oil drainage slope 9, and a chamber oil drainage valve 4 at the discharge port.

[0029] This structure optimizes the internal cavity of the motor without damaging the original internal structure of the motor or increasing the risk of equipment operation. Given that the original motor cavity had no baffle near the stator side, the structure also ensures that the oil thrown out by the bearing can be discharged in time to avoid contamination of the motor's internal cavity by the lubricating oil.

[0030] The design of this patent is to add a gap inside the motor. This gap is an insulating resin baffle 5 installed in the area between the electric stator and rotor of the motor stator and rotor chamber 10 and the motor bearing 7 to safely and reliably separate them. The insulating resin baffle 5 is directly installed on the original structure of the motor, namely the internal support frame 2 of the motor body, by means of fixing bolts 3. The insulating resin baffle 5 has a reserved hole in the middle for the motor main shaft 6 to pass through. The reserved hole and the motor main shaft 6 form a rotary seal through the rubber seal 11, reducing the probability of oil entering the motor stator and rotor chamber 10 from the gap.

[0031] Insulating resin boards are used because they can insulate against electrical hazards and do not react with oil, making them an excellent material. The added insulating resin baffle 5 forms a new chamber with the motor shaft end, namely the oil drain chamber 1. This chamber will not affect the original function of the motor, nor will it increase the operational risk. By setting the bottom of this chamber as an inclined oil drain slope 9, the leaked oil will automatically slide down by gravity and collect at the discharge port before being discharged through the chamber oil drain valve 4. This periodically drains the oil that has leaked into the motor, preventing lubricating oil from accumulating inside the motor and damaging the motor insulation over a long period of time.

[0032] In a preferred embodiment 2, the oil drain chamber 1 is symmetrically arranged with respect to the stator and rotor chambers 10 of the motor. This ensures that oil leaks from the bearings on both sides can be collected and drained separately.

[0033] As a preferred embodiment 3, a motor bearing end cover 8 is installed on the motor side wall of the oil drain chamber 1 away from the motor stator and rotor chamber 10. A motor bearing bush 7 is installed on the motor bearing end cover 8, which is the existing motor shaft end side structure. The motor main shaft 6 passes through the motor bearing bush 7 and then through the insulating resin baffle 5 to enter the motor stator and rotor chamber 10, ensuring that the formation of the oil drain chamber 1 does not conflict with the normal operation of the motor.

[0034] In a preferred embodiment 4, the insulating resin baffle 5 is composed of two half-baffles spliced ​​together. The half-baffles are symmetrically arranged with respect to the circular holes of the internal support frame 2 of the motor body, and the insulating resin baffle 5 completely covers the internal support frame 2 of the motor body. The top and bottom of the half-baffles are installed on the internal support frame 2 of the motor body with fasteners. The splicing method facilitates installation and maintenance, and allows for easy addition without changing the original structure of the motor, thereby forming an independent oil drain chamber 1.

[0035] As a more preferred embodiment 5, the half-baffle is provided with a reserved semi-circular hole on the side near the motor spindle 6. After the two half-baffles cooperate to form a complete insulating resin baffle 5, the reserved semi-circular hole forms a complete reserved hole. The motor spindle 6 passes through the complete reserved hole concentrically and coaxially, ensuring that the installation of the baffle and the formation of the chamber do not affect the normal use of the motor.

[0036] like Figure 3 and Figure 4 As shown in the preferred embodiment 6, each of the half-baffles has a rubber seal 11 on its side near the motor spindle 6. After the two half-baffles are assembled to form a complete insulating resin baffle 5, the half-baffles are sealed together by the rubber seal 11, and the complete pre-drilled hole is rotary sealed with the motor spindle 6 by the rubber seal 11. This further ensures the independence of the oil drain chamber 1, and the rubber seal 11 ensures the sealing of the complete insulating resin baffle 5 after assembly. At the same time, it strengthens the sealing between the motor spindle 6 and the complete insulating resin baffle 5, ensuring normal operation of the motor while preventing or reducing the amount of oil entering the motor stator and rotor chamber 10.

[0037] In a preferred embodiment 7, the fasteners at the top and bottom of the half-baffle are symmetrical about the middle position of the half-baffle, and there are at least two fasteners at the top. This ensures a tight and stable installation.

[0038] Preferably, the circular hole in the middle of the internal support frame 2 of the motor body can also be used as a fastening point. In order to improve the installation stability, additional fasteners can be arranged around the circular hole to strengthen the fastening between the half baffle and the internal support frame 2 of the motor body.

[0039] In a preferred embodiment 8, the fastener is a fixing bolt 3. The stud of the fixing bolt 3 passes through both the half-baffle and the internal support frame 2 of the motor body, and the two ends are threaded with fixing nuts to clamp the half-baffle and the internal support frame 2 of the motor body, ensuring a tight installation.

[0040] In a preferred embodiment 9, the oil draining slope 9 is sealed to the inner wall of the oil draining chamber 1 via sealing gaskets. The oil draining slope 9 is typically a truncated pyramid with a sloping top, placed at the bottom of the chamber. The sealing gaskets reduce the accumulation of oil that flows in through the gap between the oil draining slope 9 and the oil draining chamber, ensuring that oil automatically slides down the oil draining slope 9 and concentrates on the lowest side for easy drainage.

[0041] Preferably, the gaps can also be filled directly with an oleophobic coating.

[0042] In a preferred embodiment 10, the surface of the oil discharge slope 9 is smooth, and the oil flows into the discharge port along the oil discharge slope 9 by gravity. This ensures that the oil falls down the slope on its own, facilitating drainage.

[0043] Preferably, an oleophobic coating can be applied to the top of the oil drainage slope 9 to form an oleophobic layer, further ensuring that the oil stains fall off the slope on their own.

[0044] The working principle of this utility model:

[0045] This structure optimizes the internal cavity of the motor without damaging the original internal structure of the motor or increasing the risk of equipment operation. Given that the original motor cavity had no baffle near the stator side, the structure also ensures that the oil thrown out by the bearing can be discharged in time to avoid contamination of the motor's internal cavity by the lubricating oil.

[0046] The design of this patent is to add a gap inside the motor. This gap is an insulating resin baffle 5 installed in the area between the electric stator and rotor of the motor stator and rotor chamber 10 and the motor bearing 7 to safely and reliably separate them. The insulating resin baffle 5 is directly installed on the original structure of the motor, namely the internal support frame 2 of the motor body, by means of fixing bolts 3. The insulating resin baffle 5 has a reserved hole in the middle for the motor main shaft 6 to pass through. The reserved hole and the motor main shaft 6 form a rotary seal through the rubber seal 11, reducing the probability of oil entering the motor stator and rotor chamber 10 from the gap.

[0047] Insulating resin boards are used because they can insulate against electrical hazards and do not react with oil, making them an excellent material. The added insulating resin baffle 5 forms a new chamber with the motor shaft end, namely the oil drain chamber 1. This chamber will not affect the original function of the motor, nor will it increase the operational risk. By setting the bottom of this chamber as an inclined oil drain slope 9, the leaked oil will automatically slide down by gravity and collect at the discharge port before being discharged through the chamber oil drain valve 4. This periodically drains the oil that has leaked into the motor, preventing lubricating oil from accumulating inside the motor and damaging the motor insulation over a long period of time.

Claims

1. A novel motor sealing chamber for easy oil drainage, comprising a motor stator and rotor chamber (10) located in the middle of the motor bearing, wherein the motor stator and rotor chamber (10) has internal support frames (2) at both ends, the internal support frames (2) being vertically arranged plate structures with a circular hole at the center of the plate, characterized in that, An insulating resin baffle (5) is installed on the side of the internal support frame (2) of the motor body away from the motor stator and rotor chamber (10) by several fasteners. The insulating resin baffle (5) cooperates with the inner wall of the motor to form independent oil drain chambers (1) at both ends of the motor stator and rotor chamber (10). The motor spindle (6) passes through the insulating resin baffle (5), and the motor bearings (7) are respectively connected to the corresponding oil drain chambers (1). The bottom of each oil drain chamber (1) is provided with an oil drain slope (9). The lowest end of the oil drain slope (9) is provided with a discharge port, and the discharge port is provided with a chamber oil drain valve (4).

2. The novel motor sealing chamber for easy oil drainage according to claim 1, characterized in that, The oil drain chamber (1) is arranged symmetrically with respect to the stator and rotor chambers (10) of the electric motor.

3. The novel motor sealing chamber for easy oil drainage according to claim 2, characterized in that, The oil drain chamber (1) is located on the motor side wall away from the motor stator and rotor chamber (10). A motor bearing end cover (8) is installed on the motor bearing end cover (8). A motor bearing bush (7) is installed on the motor bearing end cover (8). The motor main shaft (6) passes through the motor bearing bush (7) and then through the insulating resin baffle (5) to enter the motor stator and rotor chamber (10).

4. A novel motor sealing chamber for easy oil drainage according to claim 3, characterized in that, The insulating resin baffle (5) is composed of two half baffles spliced ​​together. The half baffles are symmetrically arranged with respect to the round holes of the internal support frame (2) of the motor body, and the insulating resin baffle (5) completely covers the internal support frame (2) of the motor body. The top and bottom of the half baffles are installed on the internal support frame (2) of the motor body by fasteners.

5. A novel motor sealing chamber for easy oil drainage according to claim 4, characterized in that, The half-baffle is provided with a reserved semi-circular hole on the side near the motor spindle (6). After the two half-baffles are combined to form a complete insulating resin baffle (5), the reserved semi-circular hole forms a complete reserved hole, and the motor spindle (6) passes through the complete reserved hole concentrically and coaxially.

6. A novel motor sealing chamber for easy oil drainage according to claim 5, characterized in that, The side of each half-baffle near the motor spindle (6) is provided with a rubber seal (11). After the two half-baffles are combined to form a complete insulating resin baffle (5), the half-baffles are sealed together by the rubber seal (11). The complete reserved hole is sealed together with the motor spindle (6) by the rubber seal (11).

7. A novel motor sealing chamber for easy oil drainage according to claim 6, characterized in that, The fasteners at the top and bottom of the half-baffle are symmetrical about the middle position of the half-baffle, and there are no fewer than two fasteners at the top.

8. A novel motor sealing chamber for easy oil drainage according to claim 7, characterized in that, The fastener is a fixing bolt (3), the stud of the fixing bolt (3) passes through both the half baffle and the internal support frame (2) of the motor body, and the two ends are threaded with fixing nuts to clamp the half baffle and the internal support frame (2) of the motor body.

9. A novel motor sealing chamber for easy oil drainage according to any one of claims 1 to 8, characterized in that, The oil drain slope (9) is sealed to the inner wall of the oil drain chamber (1) by means of a sealing gasket.

10. A novel motor sealing chamber for easy oil drainage according to claim 9, characterized in that, The surface of the oil draining slope (9) is smooth, and the oil flows into the discharge port along the oil draining slope (9) by gravity.

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