RU172324U1 - FLYWHEAT ENERGY STORAGE WITH HORIZONTAL ROTATION AXIS - Google Patents

Abstract

The device allows to reduce power losses, increase reliability and service life. The specified technical result is achieved in that the device comprises a housing made evacuated, a shaft mounted horizontally in the housing, at least one flywheel mounted on the shaft in the housing, bearings made of bearings, a seal installed between the shaft and the housing. The bearings are mounted in bearing housings at the ends of the shaft outside the housing. Two seals are used that are installed in the area of the bearings of the outer surfaces of the extreme bearings. A lubrication system was introduced, made from the lower and upper reservoirs, from a pump located in the lower reservoir, and from three pipelines, two of which are connected to the capacities of the housings for bearings of bearings. The output end of the shaft is equipped with an oil seal. The lubrication system is configured to circulate liquid lubricant from the upper to the lower reservoir and vice versa by means of a pump, first, second and third pipelines through containers of bearing housings. 7 c.p. f-ly, 1 Fig.

Description

The utility model relates to the field of mechanical engineering and can be used in the field of energy.

A known energy storage device based on tape super-flywheels, comprising a housing made sealed, a shaft designed to be connected from above to an electric machine, a flywheel, kinematic means of coupling a shaft with a flywheel, two rolling bearings, an oil pump that are installed inside the housing, a channel for supplying oil to the rolling support moreover, the rolling bearings are made with the possibility of oil flowing through them and lubricating their rolling bodies, while below the lower rolling bearings the oil is drained into the oil pump, the seal. At least two flywheels are used in the device. Kinematic means of communication between the shaft and the flywheel are made of a pipe equipped with flanges, one of which is located externally on the upper edge of the pipe, and the other externally retreating from the lower edge of the pipe along the longitudinal axis, from the intermediate shaft and from the stand, at the bottom of which an oil reservoir is made with the upper edge of the rack channel for supplying oil to the upper rolling support. (RU, U1, No. 144074, F16F 15/315, publ. 08/10/2014).

In this device, the shaft is mounted vertically, and the oil pump is made screw. The device has a clip made with a hole for the flow of oil. Kinematic means of communication between the shaft and the flywheel are also made of a compensating coupling installed between the shaft and the intermediate shaft. The intermediate shaft is connected to the pipe through the stop of the upper rolling support with the formation of a gap between its lower end and the upper edge of the rack located above the upper rolling support. Flywheels are fixed on the outer surface of the pipe between the flanges, and the rolling bearings are installed between the inner surface of the pipe and the outer surface of the rack, on the surface of which, facing the lower flange of the pipe, an axial stop of the lower rolling support is made. The cage is installed on the edge of the end of the rack with the oil tank and on its inner surface facing the lower flange, an annular groove is made, which is in communication with the oil tank with holes for oil flow and in which a part of the pipe edge, departing from the lower flange, is installed. The oil pump is formed by helical grooves on the wall of the annular groove and / or helical grooves on the wall of the aforementioned part of the pipe edge. Elastic supports are used that are installed between the outer surface of the cage and the bottom of the housing, and the seal is mounted on the shaft above the expansion sleeve.

The device provides evacuation of the housing and lubrication of the rolling bearings, which increases the amount of stored energy, improves reliability, simplifies the lubrication system, reduces the dimensions of the device when using multiple flywheels.

A significant limitation of this technical solution is the impossibility of its use for energy storage with a horizontal shaft arrangement - the axis of rotation of the tape flywheels. In addition, only a screw oil pump of the design described above can be used in the device.

The closest is a flywheel energy storage device with a horizontal axis of rotation, comprising a housing made evacuated, a shaft mounted horizontally in the housing, at least one flywheel mounted on the shaft in the housing, rolling bearings, a vacuum seal installed between the shaft and the housing. (RU, U1, No. 121885, F16H 33/20, F16F 15/30, publ. 10.11.2012).

In this device, a part of the housing is introduced in the form of a pipe into a through central hole in the flywheel, between the cylindrical wall of the hole and the housing pipe are arranged in a row of rolling bearings, and the output shaft is made passing through the housing pipe. The rolling bearings can be cascaded, and the hermetic seal is magnetically liquid.

This technical solution reduces the energy loss due to the rotation of the flywheel, both aerodynamic due to the evacuation of the housing, and friction in the rolling bearings due to their arrangement in a row.

The main limitation of this device is the lack of lubrication of the rolling bearings, which increases the power loss during rotation of the flywheel, reduces the amount of stored energy in a short period of time and impairs reliability when using multiple flywheels. In addition, the disadvantage of this device is the asymmetry of the support node - the pipe, the bending stiffness of which varies greatly in length, which can cause harmful precession processes during rotation, as well as the fact that some of the bearings are made with rotating outer rings, which reduces the durability of the bearings.

The task solved by the utility model is the improvement of technical and operational characteristics.

The achievable technical result of the utility model is to ensure minimal power loss during rotation of the flywheel by lubricating the flywheel bearings in a vacuum, increasing reliability and service life.

To solve the problem with achieving a technical result in a known flywheel energy storage device with a horizontal axis of rotation, comprising a housing made evacuated, a shaft mounted horizontally in the housing, at least one flywheel mounted on a shaft in the housing, bearings made of bearings, sealing installed between the shaft and the housing, according to the claimed utility model, bearings are installed in bearing housings at the ends of the shaft outside the housing and two seals installed in the area of bearings of the outer surfaces of the extreme bearings facing each other, a lubrication system is introduced, made from the lower and upper reservoirs, partially filled with liquid lubricant, from a pump located in the lower reservoir, from the first pipeline communicated by a segment with the lower and upper reservoir, from the second a pipeline made in the form of two segments communicated with the upper reservoir and the capacities of the bearing housings from a third pipeline made in the form of two segments communicated with the capacities of the housings for bearings and the lower reservoir, the output end of the shaft is equipped with an oil seal installed between the output end of the shaft and the bearing housing, paired with the output end of the shaft, while the lubrication system is made with the possibility of circulating liquid lubricant from the upper to the lower reservoir and back through the pump, the first, second and third pipelines through capacities of bearing housings.

Additional embodiments of the device are possible, in which it is advisable that:

- the lower reservoir, the upper reservoir and bearing housings were evacuated, and the oil seal - vacuum;

- liquid lubricant level sensors located in the lower and upper reservoirs were introduced;

- the lower and upper reservoirs were made with recesses located at the bottom of the lower and upper reservoir, the first pipeline communicated in its segment with the pump in the region of the recess of the lower reservoir and the upper reservoir in the region of its side wall from the top, the second pipeline communicated with its two segments with the recess of the upper reservoir and capacities of housings for bearings on top, the third pipeline is connected by its two segments with capacities of housings for bearings on the bottom and with a lower reservoir in the region of its side wall from above;

- a fourth pipeline was introduced, at least two sections of which are connected with the inner surface of the bottom of the body and with the lower tank from above;

- seals installed in the area of the outer surfaces of the extreme bearings were made contact and tight, or non-contact - labyrinth or rotor-groove;

- the lower and upper tanks were equipped with fins;

- the pump was submersible;

- at least one centering element has been introduced, mounted in the housing on the outer surface of the shaft between it and the flywheel.

The indicated advantages, as well as the features of the present utility model, are explained with the help of the best embodiment with reference to the figure.

Figure 1 schematically depicts a longitudinal section of the claimed device.

The flywheel energy storage device with a horizontal axis of rotation (Fig. 1) contains a housing 1 made vacuum, a shaft 2 mounted horizontally in the housing 1, at least one flywheel 3 mounted on the shaft 2 in the housing 1 (Fig. 1 shows several flywheels ), bearings 4 made of bearings, a seal 5 mounted between the shaft 2 and the housing 1.

The bearings 4 are installed in the bearing housings 6 at the ends of the shaft 2 outside the housing 1. Two seals 5 are used, which are installed in the region of the bearings 4 of the outer surfaces of the extreme bearings facing each other. A lubrication system is introduced, made from the lower and upper reservoirs 7, 8, partially filled with liquid lubricant, from a pump 9 located in the lower reservoir 7, from the first pipeline 10, connected by a segment with the lower and upper reservoir 7, 8, from the second pipeline 11, made in the form of two segments communicated with the upper reservoir 8 and the capacities of the bearing housings 6, from the third pipeline 12, made in the form of two segments communicated with the capacities of the bearing housings 6 and the lower reservoir 7. The output end of the shaft 2 is provided an oil seal 13 installed between the output end of the shaft 2 and the bearing housing 6, paired with the output end of the shaft 2. The lubrication system is configured to circulate liquid lubricant from the upper reservoir 8 to the lower reservoir 7 and vice versa by means of a pump 9, first, second and third pipelines 10, 11, 12 through the capacity of the housings 6 for bearings.

To improve the device and improve the quality of lubrication, the lower reservoir 7, the upper reservoir 8 and the bearing housing 6 are evacuated, and the oil seal 13 is vacuum.

Liquid lubricant level sensors 14 located in the lower and upper reservoirs 7, 8, respectively, can be introduced.

A further improvement is that the lower and upper reservoirs 7, 8 are made with recesses 15, 16 located at the bottom of the lower reservoir 7 and the upper reservoir 8, respectively. The first pipeline 10 is connected by its segment with the pump 9 in the region of the recess 15 of the lower reservoir 7 and with the upper reservoir 8 in the region of its side wall from above. The second pipe 11 is communicated by its two segments with a recess 16 of the upper reservoir 8 and the capacities of the bearing housings 6 from above. The third pipeline 12 is communicated by its two segments with the capacities of the housings 6 for bearings from below, and with the lower reservoir 7 in the region of its side wall from above.

In addition, a fourth pipeline 17 can be introduced, at least two segments of which are connected with the inner surface of the bottom of the housing 1 and with the lower tank 7 from above.

Seals 5, installed in the area of the outer surfaces of the extreme bearings, can be made contact and tight or non-contact - labyrinth or rotor-grooved.

To improve heat transfer between the liquid lubricant and the environment, the lower and upper reservoirs 7, 8 are equipped with fins (not shown in Fig. 1).

The pump 9 may be submersible.

To improve operation at high speeds of rotation of the flywheel 3, at least one centering element 18 can be introduced, mounted in the housing 1 on the outer surface of the shaft 2 between it and the flywheel 3.

The device operates (Fig. 1) as follows.

In order to achieve the technical result of a utility model - to ensure minimal power loss during rotation of the flywheel 3 in a vacuum, to increase reliability and service life, it is necessary to supply liquid lubricant (vacuum) to the rolling bearings 4. Before pumping air from the housing 1, the lower and upper reservoirs 7, 8 are partially filled with such a liquid lubricant. Then, air is pumped out of the housing 1.

To output the rotation shaft 2 from the bearing housing 6 (as shown in Fig. 1, for example, the left support 4), an oil seal 13 is used, which, when evacuating the lower reservoir 7, the upper reservoir 8, and the bearing housings 6 for bearings 4, also acts as a vacuum seals.

To reduce energy losses, the amount of supplied liquid lubricant to the supports 4 must be accurately metered. To the supports 4 is a liquid lubricant isolated from the atmosphere. For this, two tanks 7, 8 are provided - the lower and upper, as well as the first, second and third pipelines 10, 11 and 12 with a specific, pre-calculated cross-section, based on the working conditions of the bearings 4 (speed of rotation of the bearings and their design features) required for the dosed supply of lubricant to the 4 rolling bearings. Under the action of gravity, the liquid lubricant from the upper reservoir 8 through the bearings 4 of the rolling 2, dosed lubricating them, flows into the lower reservoir 7.

Pump 9 circulates fluid lubricant. It is turned on by a signal from a level sensor 14 located in the upper reservoir 8 (with a decrease in the lubrication level) and a level sensor 14 located in the lower reservoir 7 (with an increase in the lubrication level). The lower and upper reservoirs 7, 8 can be made with ribbing to increase heat transfer between the liquid lubricant and the atmosphere.

Seals 5 ensure tightness between the supports 4 and the housing 1. They can be made both contact and non-contact, for example, labyrinth or screw channels. The main purpose of the seals 5 when vacuuming the lower and upper tanks 7, 8 and bearing housing 6 is to prevent liquid lubricant from entering housing 1 during operation.

For reliable supply of liquid lubricant from the upper reservoir 8 when the device is tilted, a recess 16 is provided, from which the liquid lubricant evenly flows into the segments of the second pipeline 11 and, accordingly, is evenly distributed in the supports 4. The recess 15 in the lower reservoir 7 ensures reliable operation of the pump 9. B in the case of penetration of liquid lubricant into the housing 1 through seals 5, a fourth pipeline 17 is provided, at least two segments of which are connected to the inner surface of the bottom of the housing 1 and to the lower reservoir 7 from above.

At least one centering element 18, mounted in the housing 1 on the outer surface of the shaft 2 between it and the flywheel 3, serves to reduce energy loss during rotation of the flywheel 3.

The most successfully announced "Flywheel energy storage device with a horizontal axis of rotation" is industrially applicable in the energy sector.

Claims (9)

1. A flywheel energy storage device with a horizontal axis of rotation, comprising a housing made evacuated, a shaft mounted horizontally in the housing, at least one flywheel mounted on the shaft in the housing, bearings made of bearings, a seal installed between the shaft and the housing, characterized the fact that the bearings are installed in bearing housings at the ends of the shaft outside the housing and two seals are used that are installed in the region of the bearings of the outer surfaces of the extreme bearings facing each other, a system is introduced grease, made from the lower and upper reservoirs partially filled with liquid lubricant, from a pump located in the lower reservoir, from the first pipeline communicated with a segment with the lower and upper reservoirs, from the second pipeline made in the form of two segments communicated with the upper reservoir and containers of housings for bearings, from the third pipeline, made in the form of two segments connected with containers of housings for bearings and the lower reservoir, the output end of the shaft is equipped with an oil seal ennym between the output end of the shaft and the housing bearing conjugate with the output end of the shaft, the lubrication system is configured to circulate the lubricating liquid from the upper to the lower tank and back through the pump, the first, second and third pipelines through housings bearing capacity. 2. The flywheel energy storage device according to claim 1, characterized in that the lower reservoir, the upper reservoir and the bearing housings are made evacuated, and the oil seal is vacuum. 3. The flywheel energy storage device according to claim 1, characterized in that liquid level lubricant sensors located in the lower and upper reservoirs are introduced. 4. The flywheel energy storage device according to claim 1, characterized in that the lower and upper reservoirs are made with recesses located at the bottom of the lower and upper reservoir, the first pipeline communicating with its segment with a pump in the region of the lower reservoir depression and with the upper reservoir in the region of its side wall from above, the second pipeline is communicated with its two segments with the recess of the upper reservoir and the capacities of the bearing housings from above, the third pipeline is communicated with its two segments with the capacities of the housings for bearings izu and with the lower tank in the region of its side wall from above. 4. The flywheel energy storage device according to claim 1, characterized in that a fourth pipeline is introduced, at least two segments of which are connected to the inner surface of the bottom of the housing and to the lower reservoir from above. 5. The flywheel energy storage device according to claim 1, characterized in that the seals installed in the area of the outer surfaces of the extreme bearings are made contact and sealed, or non-contact - labyrinth or rotor-grooved. 6. The flywheel energy storage device according to claim 1, characterized in that the lower and upper reservoirs are equipped with fins. 7. The flywheel energy storage device according to claim 1, characterized in that the pump is submersible. 8. The flywheel energy storage device according to claim 1, characterized in that at least one centering element is inserted, mounted in the housing on the outer surface of the shaft between it and the flywheel.

Images