JP2017147838A - Rotary machine and gas-liquid separation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary machine which achieves effect of preferably facilitating lubrication of a bearing with a high versatility technology having a simpler structure, and to provide a gas-liquid separation device provided in the rotary machine.SOLUTION: A rotary machine 1 according to the invention includes: a lubricant recovery passage 4 for recovering an oil L supplied to a bearing 22 and functioning as a lubricant from a housing 20; a gas-liquid separation device 5 which is disposed between an air-cooling device 3 and the lubricant recovery passage 4 and separates air from the oil L recovered from the lubricant recovery passage 4; and an air suction passage 6 for causing the air-cooling device 3 to suction the air a separated by the gas-liquid separation device 5.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a rotating machine including a generator such as a dynamo and an alternator and an electric motor such as a motor.

  2. Description of the Related Art Conventionally, in a rotating machine that uses oil in a bearing portion, a rotating machine that circulates oil through a bearing is known in order to make the rotation of a rotating shaft smooth (see, for example, Patent Document 1).

  The rotating machine described in Patent Document 1 lubricates the bearing with oil by generating a negative pressure in the oil flow path returned from the bearing using the flow of cooling oil circulating in the housing. It is intended to encourage.

JP 2011-45200 A

  In such a rotating machine as described in Patent Document 1, not only the effect of urging the bearing to be lubricated with oil as described above, but also the oil can be effectively avoided from leaking out of the housing unnecessarily. It is possible. However, the rotating machine described in Patent Document 1 originally has a configuration that lubricates cooling oil in the casing, and the above technique cannot be applied to a rotating machine that does not have the configuration. In addition, in order to change the specifications for applying the technology according to the invention to the configuration for circulating oil, there is a possibility that the hydraulic circuit itself may be fundamentally changed.

  The present invention focuses on the above-described points, and specifically provides a rotating machine that achieves the effect of suitably promoting the lubrication of a bearing with a simpler configuration and a highly versatile technique. With the goal.

  The present invention takes the following measures in view of the above problems.

  That is, the rotating machine of the present invention includes a rotating shaft that is pivotally supported by a bearing provided in the casing, a lubricating liquid recovery path for recovering the lubricating liquid supplied to the bearing from the casing, and this lubricating liquid recovery A suction device that is provided on the downstream side of the passage and generates a negative pressure for recovering the lubricating liquid supplied to the bearing by air suction from the downstream side, and is interposed in the suction device and the lubricating liquid recovery path. A gas-liquid separator that separates air from the lubricating liquid recovered from the lubricating liquid recovery path; and an air suction path that causes the suction apparatus to suck air separated by the gas-liquid separator. Features.

  If it is such, the effect that the circulation of the lubricating liquid is promoted by the generation of the negative pressure can be applied even to a rotating machine having a simple configuration and having no liquid cooling means. . In other words, according to the present invention, specifically, it is possible to provide a rotating machine that achieves the effect of appropriately promoting the lubrication of the bearing by a simpler configuration and a highly versatile technique.

  Further, in order to effectively prevent an increase in the number of parts by suppressing the provision of a special configuration to a so-called air-cooled rotating machine, the suction device is used to cool the casing with cooling air. It is desirable to use an air cooling device.

  In order to achieve reliable separation of the lubricating liquid and gas and more effectively avoid the accidental arrival of the lubricating liquid in the suction device, the gas-liquid separating device is placed above the lubricating liquid. It is desirable to have a liquid dropping part that drops downward from the liquid and an air recovery part that is connected to the air suction path from above the liquid dropping part.

  In order to contribute to effective use of the lubricating liquid while avoiding excessive accumulation of the lubricating liquid in the gas-liquid separating apparatus, the gas-liquid separating apparatus is used to recover the lubricating liquid. It is preferable to have a liquid recovery unit.

  In order to further facilitate the effective use of the lubricating liquid and stably perform the gas-liquid separation over a long period of time, the lubricating liquid recovered by the liquid recovery unit is configured as a hydraulic device. It shall have a liquid storage path for storing in the tank, and this liquid storage path is connected to the liquid recovery part and immersed in the lubricating liquid stored in the tank and the upper end part for dropping the lubricating liquid reaching the liquid recovery part It is preferable to form a tubular body having a lower end portion from which gas inflow is prohibited.

  The gas-liquid separation device according to the present invention capable of effectively exhibiting the above effect is a gas-liquid separation device connected to a rotating machine to recover the lubricating liquid from the rotating machine, and the lubricating liquid recovered from the rotating machine A liquid drop part that drops the liquid from the top to the bottom, and an air recovery part that is directly or indirectly connected to the suction device so as to suck air from above the liquid drop part.

  As described above, according to the present invention described above, it is possible to provide a rotating machine and a gas-liquid separation device that achieve the effect of suitably promoting the lubrication of the bearing by a simpler configuration and a highly versatile technique.

The typical front sectional view showing the rotating machine concerning one embodiment of the present invention. The typical sectional side view which shows the rotary machine. Structure explanatory drawing of the principal part which concerns on the same embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to FIG. 1, FIG. 2, and FIG.

  As shown in FIG. 1, the rotating machine 1 according to the present embodiment is used as a generator such as a dynamo or an alternator, or an electric motor such as a motor that drives a fan. The rotary machine main body 2 having a bearing 22 that pivotally supports the rotary machine 2 and the air cooling device 3 for cooling the housing 20 with cooling air are mainly provided in the rotary machine main body 2. In addition to the rotating machine body 2 and the air cooling device 3, the rotating machine 1 has a function of supplying oil L from the bearing oil supply port 23 to at least the bearing 22, and controls each part of the rotating machine body 2. A function as an actuator that operates as much as possible is provided. However, since the existing configuration can be used as appropriate for the hydraulic circuit, illustration and description regarding configurations other than the tank T configuring the hydraulic circuit are omitted.

  In the rotating machine 1 according to the present embodiment, a bearing oil supply port 23 and a bearing oil discharge port 24 are provided in the vicinity of the bearing 22 so as to lubricate the oil L, which is a lubricating liquid, with respect to the bearing 22 and the vicinity thereof.

  As shown in FIG. 2, the air cooling device 3 is provided inside and outside the rotating machine body 2 to cool the rotating machine body 2 by the rotation of the cooling blower 31, and includes a cooling blower 31 that generates cooling air, The blower motor 32 for driving the cooling blower 31, the air circulation path 33 for allowing the cooling air to flow through the housing 20 without any damage, and the cooling air intake hole 34 for taking in the cooling air from the outside of the housing 20. And a cooling air inlet 35 and a cooling air outlet 36 provided near the cooling blower 31 for discharging the cooling air from the inside of the housing 20 to the outside. With this configuration, when the cooling blower 31 is rotated by driving the blower motor 32, the cooling air intake holes 34 provided at four locations on both sides of the housing 20 and the cooling air intake ports 35 provided on the front surface of the housing 20 are used. The introduced cooling air, that is, air a, circulates through the vicinity of the portion where heat is particularly likely to be generated in the housing 20, passes through the vicinity of the cooling blower 31, and is discharged out of the rotating machine 1 from the cooling air discharge port 36. . Since the cooling air circulates in the vicinity of the bearing 22 in the rotating machine 1, the vicinity of the bearing 22 is exposed to the air a.

  That is, when the oil L supplied from the bearing oil supply port 23 circulates through the bearing 22 in the housing 20 and the vicinity thereof, the oil L is exposed to the air a which is cooling air, thereby being discharged from the bearing oil discharge port 24. Is in a state in which air a is included.

  In this embodiment, both ends of the rotary shaft are respectively supported by the bearings 22, and the oil recovery passage 4 and the gas-liquid separator are connected to the bearing oil discharge ports 24 provided in the vicinity of the bearings 22. . For the sake of convenience, the embodiment will be described by focusing only on the configuration connected to the oil recovery path 4 on the left side of FIG.

  Here, in the rotating machine 1 according to the present embodiment, in addition to the rotating machine body 2 and the air cooling device 3, the lubricating liquid recovery path for recovering the oil L as the lubricating liquid supplied to the bearing 22 from the inside of the housing 20. The oil recovery path 4, the gas-liquid separator 5 that separates the air a from the oil L that is the lubricating liquid recovered from the oil recovery path 4 and interposed in the air cooling device 3 and the oil recovery path 4, and the gas-liquid separator 5 And an air suction passage 6 for sucking the air a separated by the air cooling device 3 as a suction device. Further, the rotating machine 1 according to the present embodiment is configured so that the air cooling device 3 is provided with a negative pressure for recovering the oil L that is provided on the downstream side of the oil recovery path 4 and is supplied to the bearing 22 by air suction from the downstream side. It is used as a suction device to generate.

  That is, the rotating machine 1 according to this embodiment is supplied to the bearing 22 by generating a negative pressure in the oil recovery path 4 by connecting the gas-liquid separator 5 and the air suction path 6 to the oil recovery path 4. The oil L can be suitably returned to the tank T.

  Hereinafter, the gas-liquid separator 5 in the rotating machine 1 and the configuration in the vicinity of the gas-liquid separator 5 will be described.

  As shown in FIG. 3, the gas-liquid separation device 5 includes a device main body 51 having a separation chamber 55 that is a space for separating oil L and air a inside, and a liquid connected to the bearing oil outlet 24. It has a drop part 52, an air recovery part 53 for discharging air a contained in the oil, and a liquid recovery part 54 for recovering the oil L. The liquid dropping part 52 includes a drain oil suction port 56 connected to the bearing oil drain port 24 via the oil recovery path 4 and a pipe-like drop pipe 57 extending in the vertical direction continuous to the oil drain suction port 56. Have. The air recovery unit 53 mainly includes an air suction port 58 that is an opening provided on the upper surface side of the apparatus main body 51, and the oil L that is a liquid sucked from the drain oil suction port 56 is stored in the separation chamber 55. In order to effectively avoid unnecessary oil from adhering to the air suction path 6 and the cooling blower 31 by recovering the air contained in the oil L from above while falling downward on the bottom side. belongs to. The liquid recovery unit 54 mainly includes an oil discharge port 59 provided on the bottom side of the separation chamber 55. The oil discharge port 59 is connected to a tank T constituting a hydraulic circuit via the liquid storage path 7. However, in the present embodiment, the configuration is such that the inflow of unnecessary gas into the separation chamber 55 is prohibited by preventing the air a from entering from the outside of the oil discharge port 59.

  The air suction path 6 has a tubular suction path main body 61 that is connected to the gas-liquid separation device 5 on the proximal end side, and a negative pressure intake that opens near the cooling blower 31 on the distal end side of the suction path main body 61. And a mouth 62.

  The liquid storage path 7 is a tubular body for returning the oil L recovered by the liquid recovery part 54 to the tank T, and is connected to the drain oil discharge port 59 and is the upper end for dropping the oil that has reached the liquid recovery part 54 Part 71 and lower end part 72 positioned below this upper end part and immersing the end part below oil level LS of oil L in tank T to inhibit the inflow of air a ing.

  Here, when the rotating machine 1 according to the present embodiment operates, the oil L is supplied from the bearing oil supply port 23 of the rotating machine body 2 by a hydraulic device (not shown). At the same time, the rotation of the cooling blower 31 by the operation of the air cooling device 3 is also started, so that a negative pressure is generated in the negative pressure intake port 62 provided in the vicinity of the cooling blower 31, and the air suction path 6 A flow of air a in the direction from the liquid separator 5 to the cooling blower 31 is generated. In other words, air a is sucked from the air suction port 58 of the gas-liquid separator 5, and the oil L is sucked from the bearing oil discharge port 24 by the suction force. Is realized. And since the oil L discharged | emitted from the bearing oil discharge port 24 is also exposed to the air circulation path 33 which comprises the air-cooling apparatus 3 as above-mentioned, it contains the air more than fixed. In other words, due to the suction from the air suction path 6, the air a and the oil L that is liquid are sucked in a mixed state and reach the gas-liquid separator 5.

  Here, the air a and the oil L that have reached the gas-liquid separator 5 are dropped only by the liquid dropping unit 52, and only the air a contained in the oil L is above the separation chamber 55. From the vicinity of the cooling blower 31 and discharged through the cooling air discharge port 36.

  On the other hand, the oil L that has reached the liquid dropping unit 52 is dropped on the bottom surface of the separation chamber 55 and stored in the separation chamber 55, but this oil L is a cylindrical body through the oil discharge port 59 of the liquid recovery unit 54. It passes through a certain liquid storage path 7 and is collected into the tank T. The suction force is also applied to the oil discharge port 59 of the liquid recovery unit 54 due to the negative pressure generated by the rotation of the cooling blower 31. However, in the present embodiment, the lower end portion of the liquid storage path 7 is always closed by the oil L in the tank T. Therefore, although the oil level LS in the liquid storage path 7 rises and falls according to the magnitude of the negative pressure, the liquid recovery part 54 is always kept closed. Specifically, as the negative pressure increases, the oil level LS in the liquid storage path 7 increases, and a state is formed in which the generated negative pressure and the weight of the increased oil L are balanced. Thereby, all of the negative pressure generated by the cooling blower 31 is provided for the action of sucking the bearing oil discharge port 24, and the oil L is not sucked unnecessarily from the tank T.

  As described above, the rotating machine 1 according to this embodiment includes the air cooling device 3 as a suction device that generates a negative pressure for collecting the lubricating liquid supplied to the bearing 22 by air suction, and the air cooling device 3 and the lubricating liquid. A gas-liquid separator 5 that separates the air a from the lubricating liquid that is interposed in the oil recovery path 4 that is a recovery path and is recovered from the oil recovery path 4, and the air a separated by the gas-liquid separator 5 is sucked into the suction device. And an air suction path 6 for the purpose.

  With this configuration, the effect of appropriately promoting the lubrication of the bearing 22 is realized by a simple configuration and highly versatile technology.

  In particular, in the present embodiment, by generating a negative pressure by using the rotation of the cooling blower 31 of the air cooling device 3, it is possible to suppress the provision of a special configuration to the so-called air cooling type rotating machine 1 and reduce the number of parts. While effectively avoiding the increase, a suitable circulation of the oil L to the bearing 22 is realized.

  In the present embodiment, as the configuration of the gas-liquid separator 5, the oil L is separated by a simple and reliable method of dropping by gravity, so that the configuration of the rotating machine 1 itself is unnecessarily enlarged and complicated. Is effectively avoided.

  In the present embodiment, the oil L separated by the gas-liquid separator 5 is recovered and used again in the hydraulic circuit, which contributes to effective use of the oil L.

  Then, when collecting the oil L, the weight of the oil L itself is utilized by making the configuration of the lower end portion of the liquid reservoir 7 immersed in the lubricating liquid stored in the tank T and prohibiting the inflow of gas. The negative pressure is effectively applied to the bearing 22 side while effectively avoiding the circulation of the oil L around the bearing 22 with higher efficiency and unnecessary suction of the oil L in the tank T. .

  Although one embodiment of the present invention has been described above, the present invention is not limited to the configuration of the above embodiment. For example, in the above-described embodiment, the present invention is applied to a so-called air-cooled rotating machine, but the present invention may be applied to an oil-cooled rotating machine that performs cooling by a hydraulic circuit. In that case, it is conceivable to use a pump for sucking air instead of the cooling blower as a suction device for generating negative pressure. In the above embodiment, the configuration of the gas-liquid separation device is an aspect in which each of the oil discharge suction port and the air suction port is provided one by one. Of course, a plurality of these may be provided in a single separation chamber. . Specifically, a single gas-liquid separator may be applied to both bearings of the rotating machine.

  Other configurations can be variously modified without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Rotating machine 20 ... Housing 22 ... Bearing 3 ... Air cooling device 4 ... Lubricating liquid recovery path 5 ... Gas-liquid separation device 52 ... Liquid dropping part 53 ... Air recovery part 54 ... Liquid recovery part 6 ... Air suction path 7 ... Liquid storage path a ... Air L ... Lubricating liquid (oil)

Claims (6)

A rotating shaft pivotally supported by a bearing provided in the housing;
A lubricant recovery path for recovering the lubricant supplied to the bearing from the inside of the housing;
A suction device which is provided on the downstream side of the lubricating liquid recovery path and generates a negative pressure for recovering the lubricating liquid supplied to the bearing by air suction from the downstream side;
A gas-liquid separation device that separates air from the lubricating liquid that is interposed in the suction device and the lubricating liquid recovery path and is recovered from the lubricating liquid recovery path;
A rotating machine comprising: an air suction path for causing the suction device to suck air separated by the gas-liquid separation device. The rotating machine according to claim 1, wherein the suction device is an air cooling device for cooling the housing with cooling air. The gas-liquid separator includes a liquid dropping unit that drops the lubricating liquid from above to below, and an air recovery unit that is connected to the air suction path from above the liquid dropping unit. The rotating machine according to 2. The rotating machine according to any one of claims 1 to 3, wherein the gas-liquid separator has a liquid recovery unit for recovering a lubricating liquid. It has a liquid storage path for storing the lubricating liquid recovered by the liquid recovery unit in a tank constituting the hydraulic device,
The liquid storage path is connected to the liquid recovery section and drops the lubricating liquid that has reached the liquid recovery section, and a lower end section that is immersed in the lubricating liquid stored in the tank and is prohibited from inflowing gas. The rotating machine according to claim 4, which is a tubular body having A gas-liquid separation device connected to the rotating machine to recover the lubricating liquid from the rotating machine,
A liquid dropping section for dropping the lubricating liquid recovered from the rotating machine from above to below;
A gas-liquid separation device comprising: an air recovery unit connected directly or indirectly to a suction device so as to suck air from above the liquid dropping unit.

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