JP2000346083A - Bearing lubricating method and bearing lubricating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To give an internal pressure without impairing the lubricating function of oil-air. SOLUTION: In a bearing lubricating method for lubricating a bearing device 1 by its oil-air, the bearing device 1 is arranged in opposed ring-like spaces 4 sealed by contact type seals 5 between two ring bodies 2, 3 concentrically arranged in and out of the diametrical direction, the oil-air is supplied into opposed ring-like spaces 1 by a necessary pressure, and the supplied oil-air is discharged outside the opposed ring like spaces 4 through an oil-air discharge passage 7. Air is allowed to act on the oil-air discharge passage 7 from outside by an ejector pump 20 to give internal pressure to the opposed ring-like spaces.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a bearing lubrication method for lubricating a bearing device with oil air and a bearing lubrication device. In addition, as the above-mentioned bearing device, for example, there is a bearing device used for a rotation support portion of a transport path for transporting rolled materials or food-related articles.

[0002]

2. Description of the Related Art A bearing device to be lubricated by oil air is provided in an opposed annular space defined between two rotating-side and non-rotating-side rings concentrically arranged inside and outside in a radial direction. Mounted to support rotation of the rotating annulus.

[0003] In order to lubricate such a bearing device with oil air, a seal is provided at an axial end that is open to the outside of the non-rotating side ring. Thereby, the opposed annular space is sealed from the outside. An oil air supply passage and an oil air discharge passage are provided on the non-rotating side ring to lubricate the bearing device by allowing oil air to pass through the sealed annular space. Oil air is supplied from the oil air supply path into the opposed annular space, and after lubricating the bearing device, is discharged to the outside from the oil air discharge path. The discharged oil air is collected in an external collection tank.

[0004]

In the oil-air lubrication described above, in order to improve the sealing of the opposed annular space by the seal, a contact type in which the opposed annular space comes into contact with the rotating side annular body may be used. In the case where the seal is of the contact type, the oil air discharge passage is formed into a minute shape such as an orifice to effectively prevent the entry of unnecessary substances in addition to the improvement of the sealing performance. Higher things are done. The internal pressure higher than the atmospheric pressure is applied to the opposed annular space because the oil air supplied from the oil air supply channel becomes difficult to be discharged from the oil air discharge channel if the oil air discharge channel has a minute hole shape, and this acts as the internal pressure. .

In the above-described conventional method of applying the internal pressure, the internal pressure is set to, for example, a small value other than by reducing the cross-sectional area of the oil air discharge passage. And the oil-air lubrication function may be impaired.

[0006] Therefore, an object of the present invention is to solve the problem of enabling internal pressure to be applied without impairing the oil-air lubrication function.

[0007]

SUMMARY OF THE INVENTION A bearing lubrication method according to the present invention resides in a bearing device in an opposed annular space which is hermetically sealed by a contact-type seal between two annular members arranged concentrically inward and outward. In the bearing lubrication method of supplying oil air into the opposed annular space at a required pressure, discharging the supplied oil air to the outside of the opposed annular space via the oil air discharge path, and lubricating the bearing device with the oil air, By applying internal pressure to the opposed annular space by applying air from outside to the oil air discharged from the oil air discharge passage, the internal pressure can be applied without narrowing the discharge cross-sectional area of the oil air discharge passage. There is no need to set the oil-air discharge path to a cross-sectional area that causes clogging and impairs the oil-air lubrication function.

Preferably, the internal pressure can be adjusted by adjusting the supply amount of air for applying the internal pressure. In this case, more preferably, the internal pressure can be accurately adjusted by controlling while monitoring the air supply amount.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described based on embodiments shown in the drawings.

(Embodiment 1) Embodiment 1 will be described with reference to FIG. 1 and FIG. FIG. 1 is a configuration diagram of a bearing lubrication device, and FIG. 2 is a diagram for explaining internal pressure adjustment.

In FIG. 1, reference numeral 1 denotes a bearing device to be lubricated. The bearing device 1 rotatably supports the rotating shaft 3 with respect to the inner periphery of the case 2, and is formed by combining one or more of various types of rolling bearings. The above-described rotating shaft 3 is, for example, both ends of a roller or the like provided in the article transport path.

The opposed annular space 4 between the case 2 in which the bearing device 1 is disposed and the rotating shaft 3 is sealed by contact-type seals 5 and 5. The contact seals 5, 5 are attached to both ends of the inner peripheral surface of the case 2 in the axial direction in contact with the outer peripheral surface of the rotating shaft 3.

The bearing device 1 in the sealed opposed annular space 4 is cooled and lubricated by oil air supplied from an external oil air supply unit 10.
In order to supply the oil air to the opposed annular space 4, an oil air supply passage 6 is provided at a required position in the upper half of the case 2. In order to discharge the oil air supplied into the opposed annular space 4 to the outside, an oil air discharge path 7 is provided at a required position in the lower half of the case 2. The following oil lubrication device (symbol is omitted) is attached to the oil air supply path 6 and the oil air discharge path 7. The oil-air supply unit 10 mixes oil and air with an oil supply source 11, an air supply source 12 as an air supply unit that supplies air in a compressed state, and uses the oil-air supply path 6 as an oil-air supply path. And a mixing block 13 that supplies the oil air to the opposed annular space 4 via a pipe 40. The oil air discharge portion of the mixing block 13 is connected to an oil air supply path 6 provided at a required position in the upper half of the case 2 via a pipe 40. Have been.

In the above configuration, the oil introduced from the oil supply source 11 of the oil air supply unit 10 and the compressed air (the air pressure is, for example, 0.3 to 0.5 MPa) introduced from the air supply source 12 are mixed. The mixture is made into oil air by the block 13. This oil air flows through the pipe 40 and the oil air supply path 6 into the opposed annular space 4 in which the bearing device 1 is disposed, for example, at a pressure of 0.0.
It is supplied at 5 to 0.2 MPa. Thus, the bearing device 1 is cooled and lubricated by the oil air.

The bearing lubricating apparatus according to the present embodiment includes an ejector pump 20 as an oil air discharge element in addition to the oil air supply unit 10 as the oil air supply element.
And a recovery tank 30. Ejector pump 20
Has an air supply port 21, an oil air supply port 22, and an oil air discharge port 23, and a pipe 41 is connected to the air supply port 21 and a pipe 42 is connected to the oil air supply port 22, respectively.

In this embodiment, the ejector pump 20 collides the compressed air supplied from the air supply source 12 with the oil air discharged from the oil air discharge passage 7 to generate an air turbulent flow. Then, the turbulent flow acts as a load against the discharge pressure of the oil air to function as an internal pressure applying mechanism for applying an internal pressure to the opposed annular space.

In the first embodiment, a manual valve 43 as air flow control means is provided in the pipe 41 so that the internal pressure can be adjusted, and the internal pressure can be adjusted accurately and easily. In order to make
A pressure gauge 44 is provided as internal pressure measuring means. The air flow control means is not limited to the manual valve 43, and may be an electromagnetic valve or anything if it can control the air flow. When adjusting the internal pressure, the flow rate Q _A0 of the air supplied to the air supply port 21 of the ejector pump 20 is controlled by the manual valve 43 to obtain the flow rate Q _A , thereby controlling the amount of turbulence of the compressed air. Thereby, the discharge of the oil air from the oil air discharge passage 7 is controlled, and the internal pressure in the opposed annular space 4 is adjusted.

The internal pressure of the opposed annular space 4 is monitored by a pressure gauge 44. In this case, the internal pressure monitoring means is not limited to the pressure gauge. In short, the internal pressure monitoring means may be a pressure sensor as long as the internal pressure can be monitored and a device for displaying the output of the pressure sensor as an image.

The oil air discharged from the oil air discharge port 23 of the ejector pump 20 is separated by a filter 45 for separating air and oil, and the separated oil is collected in a collection tank 30.

As described above, according to the first embodiment, the operator can apply the internal pressure by the ejector pump 20 and can adjust the internal pressure by adjusting the manual valve 43.
At this time, by adjusting the manual valve 43 while observing the pressure gauge 44, the internal pressure of the opposed annular space 4 can be adjusted while monitoring.

The application of the internal pressure will be described with reference to FIG. 2, the horizontal axis represents the air flow rate Q _A (unit: NL / Min) adjusted by the manual valve 43, and the vertical axis represents the internal pressure P (unit: kgf / cm ² ). Q _B (unit: NL / Min) indicates the flow rate of the air discharged from the filter 45 and collected. Here the collected air flow rate is Q
_B = 40 NL / Min and Q _B = 25 NL / Min are typically caused by variations in the internal structure of the bearing and are typically 2
Are shown. Even if the flow rate of the collected air varies, the internal pressure can be adjusted to the same value by controlling the flow rate of the supplied air.

(Embodiment 2) Embodiment 2 will be described with reference to FIG. In the second embodiment, except for the oil air supply unit 10, a plurality of bearing lubrication device portions A0 of FIG.
1, A2. In FIG. 3, the parts corresponding to those in FIG. 1 are denoted by the same arithmetic numerals, and the bearing lubrication device part A1 is denoted by a suffix a, and the bearing lubrication device part A2 is denoted by a suffix b. And each bearing lubrication device A1, A2
In each case, oil air and air are commonly supplied from the oil air supply unit 10.

In the second embodiment, the pipe 40 for supplying oil air from the oil air supply unit 10 is a main pipe 40, and the main pipe 40 is branched to branch pipes 40a and 40a.
0b, the pipes 41 are connected to the respective oil air supply paths of the cases 1a and 1b, and the pipe 41 for supplying air from the oil air supply unit 10 is a main pipe 41, and the main pipe 41
1 is branched into branch pipes 41a and 41b to form air supply ports 21a and 21a of the ejector pumps 20a and 20b, respectively.
21b. These branch pipes 41a, 41b
Manual valves 43a and 43b are provided respectively. Q
_A0 is the air flow rate before flow control by the manual valves 43a and 43b, Q
_A1, Q _A2 denotes a manual valve 43a, the air flow after the flow rate is controlled by 43b, respectively. In addition, pressure gauges 44a and 44b are provided on the pipes 42a and 42b from the oil air discharge passages of the cases 1a and 1b, respectively. In addition,
The rotating shafts 3a and 3b may be separate rotating shafts or the same rotating shaft. The bearing devices 1a and 1b support the corresponding rotating shafts 3a and 3b, respectively.
a and 1b are lubricated by the oil air of the bearing lubrication device portions A1 and A2, respectively.

In the above configuration, the bearing lubrication device portion A
1 and A2, the internal pressure can be applied to each of the ejector pumps 20a and 20b.
The internal pressure can be adjusted by adjusting the flow rate of the air supplied to the 0a air supply port 21a by the manual valve 43a. In this case, the air flow rates Q _A1 , Q _A2 at the manual valves 43a, 43b of these bearing lubrication device portions A1, A2, respectively.
The internal pressure adjustment in each of the bearing lubricating device portions A1 and A2 is the same as that shown in FIG.

(Other Embodiments) In the above-described embodiment, the seals 5 and 5 are provided on both sides in the axial direction of the bearing device 1, but as shown in FIG.
2, the space 54 on one side of the case 52 may be a sealed space, and the seal 5 may be provided only on the other side.

In the above embodiment, the bearing device 1 for rotatably supporting the rotating shaft 3 on the case 2 has been exemplified. However, the bearing for rotatably supporting the outer ring 2 on the inner ring 3 is described. The device 1 can be configured to be lubricated.
In that case, it is preferable to provide an oil air supply passage for the non-rotating side ring. FIG. 5 shows a specific example of such an embodiment.
Shown in A roller 69 is rotatably disposed on a fixed shaft 64 fixed to the cases 62, 63 via bearing devices 61, 61. At both ends of the roller 69, the roller 69 and the fixed shaft 64
Seals 65, 65 for sealing the annular space therebetween are provided. An oil air supply path 66 is provided inside the case 63 and the fixed shaft 64.
Is formed with an oil air discharge passage 67. As in the above-described embodiment, the oil air supplied from the oil air supply path 66 is supplied to the annular space 71, the bearing devices 61, 6
1. The oil is discharged from the oil air discharge passage 67 through the spaces 74, 74. Note that the present embodiment is used for a transport device that transports an article using the rollers 69 and the like.

In the above-described embodiment, the ejector pump 20 is connected to the oil air discharge passage 7 through the pipe 42. However, the present invention is not limited to this, and the supply port 22 side of the ejector pump 20 is protruded. Alternatively, the protruding portion may be directly connected to the oil air discharge path 7. In this case, a pressure measuring means such as the pressure gauge 44 may be built in the ejector pump 20. Further, although the manual valve 43 is provided in the pipe 41, the present invention is not limited to this. A valve may be provided in the ejector pump 20 so that the valve can be operated from the outside. Further, although the air flow rate is manually controlled by the manual valve 43, the present invention is not limited to this. For example, an electromagnetic valve may be used, which may be externally controlled by a microcomputer or the like. In addition, the present invention is not limited to adjusting the internal pressure by relying on the monitor of the operator. The microcomputer stores the internal pressure to be adjusted (adjusted internal pressure) and controls the air so that the measured value of the internal pressure matches the adjusted internal pressure. The flow rate may be automatically adjusted, and the internal pressure may be adjusted accordingly.

[0028]

According to the internal pressure adjusting method of the present invention, the internal pressure can be applied without reducing the discharge cross-sectional area of the oil air discharge passage. Further, since the cross-sectional area of the oil-air discharge passage is not narrowed, the oil-air discharge passage is not clogged, so that the oil-air lubrication function is not impaired when the internal pressure is applied. In this case, the internal pressure can be adjusted by adjusting the air flow rate for applying the internal pressure, and the internal pressure can be easily and accurately adjusted by controlling the air flow rate while monitoring the internal pressure.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a bearing lubrication device according to a first embodiment of the present invention.

FIG. 2 is a view for explaining internal pressure application in the bearing lubrication device of FIG. 1;

FIG. 3 is a configuration diagram of a bearing lubrication device according to Embodiment 2 of the present invention.

FIG. 4 is a configuration diagram of a bearing lubrication device according to Embodiment 3 of the present invention.

FIG. 5 is a configuration diagram of a bearing lubrication device according to a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bearing device 2 Case 3 Rotating shaft 4 Opposing annular space 5 Contact type seal 6 Oil air supply path of case 1 7 Oil air discharge path of case 1 10 Oil air supply unit 20 Ejector pump 30 Recovery tank 43 Manual valve 44 Pressure gauge

Claims (9)

[Claims] 1. A bearing device is disposed in an opposed annular space sealed by a contact-type seal between two annular members disposed concentrically inside and outside in a radial direction, and oil air is introduced into the opposed annular space. In a bearing lubrication method in which the oil is supplied at a required pressure and the supplied oil air is discharged to the outside of the opposed annular space through the oil air discharge path to lubricate the bearing device with the oil air, the air is externally supplied to the oil air discharged from the oil air discharge path. A bearing lubrication method characterized by applying an internal pressure to the opposed annular space by making it act more. 2. A method of lubricating a bearing according to claim 1, wherein an air resistance load mechanism is connected to the oil air discharge path directly or via a pipe, and the air resistance load mechanism resists the discharge pressure of the oil air. A method of lubricating a bearing, wherein air is externally applied so as to generate a load to apply the internal pressure. 3. The bearing lubrication method according to claim 2, wherein an ejector pump is used as the air resistance load mechanism.
A bearing lubrication method characterized by the above-mentioned. 4. The bearing lubrication method according to claim 1, wherein the internal pressure can be adjusted by controlling the air supply amount. 5. The bearing lubrication method according to claim 4, wherein the air supply amount is adjusted while monitoring an internal pressure. 6. A bearing lubricating device for lubricating a bearing device disposed in an opposed annular space between two annular members disposed concentrically inside and outside in a radial direction with oil air, wherein the opposed lubricating device includes: A contact seal disposed at an axially open end of the bearing device to seal the opposed annular space; an oil air supply element for supplying oil air into the opposed annular space at a required pressure; An oil air discharge path for discharging the oil air to the outside, and an internal pressure applying mechanism for applying an internal pressure to the opposed annular space by applying air from outside to the oil air discharge path. Characteristic bearing lubrication device. 7. The bearing lubrication device according to claim 6, wherein the internal pressure applying mechanism is an ejector pump that generates a turbulent air flow inside. 8. The bearing lubrication device according to claim 6, further comprising air supply control means for controlling an air supply amount to said air resistance load mechanism, wherein said air supply control means controls an air supply amount. A bearing lubrication device, wherein the internal pressure can be adjusted. 9. The bearing lubrication device according to claim 8, further comprising an internal pressure measuring means for measuring the internal pressure.
A bearing lubrication device characterized by the above-mentioned.