JP4683870B2 - Lubricating oil supply method for rotating part support - Google Patents

Description

  The present invention relates to a method for supplying lubricating oil in a rotating part support used in rotating devices such as electric motors and spindles.

  Grease lubrication is a method in which a certain amount of grease is applied to the bearing when assembling the bearing, and it is used with little refueling afterwards, so most of the grease applied when the bearing is first rotated. Since the grease that is blown around and remains on the raceway surface is extremely small, it cannot be rotated at high speed for a long time. Moreover, the lifetime is very unstable.

  Oil mist lubrication is a method in which oil is atomized with compressed air and sprayed onto the rotating part of the bearing for lubrication.Heat generation is suppressed, and it is used as a bearing that rotates at high speed, but a dedicated oil mist generator is required. There is a problem that the apparatus becomes expensive and the surrounding environment is deteriorated because exhaust gas containing oil is emitted.

  Oil-air lubrication is a method of supplying a small amount of oil to the rotating part of the bearing with compressed air, and heat generation is also suppressed, and it is used for high-speed rotation, but a dedicated oil-air lubrication device is required and the device becomes expensive, Since exhaust gas containing oil is emitted, there is a problem that the surrounding environment deteriorates.

  Jet lubrication is a method in which a large amount of cooled oil is poured into the rotating part of the bearing, so it is excellent in cooling and used for high-speed rotation, but it requires very large power to rotate the shaft. Since a large amount of oil controlled at a constant temperature is required, there is a problem that the apparatus becomes very expensive, and it is used only in limited applications such as a bearing of an aircraft engine.

  As described above, the conventional lubrication methods for the rotating part support have advantages and disadvantages, but generally the amount of lubricating oil to be supplied increases as the speed of the rotary bearing increases.

  However, the conventional techniques according to the above methods do not have the basic idea of appropriately changing the supply amount of the lubricating oil in response to the change in the rotational speed.

Japanese Patent Laid-Open No. 3-196942 JP-A-11-63385 JP 2000-176985 A

  SUMMARY OF THE INVENTION The present invention has been made in view of the above-described state of the art, and an object of the present invention is to provide a basic configuration of a lubricating oil supply method that can supply appropriate lubricating oil in response to a change in rotational speed of a rotary bearing. It is.

To solve the above problems, the configuration of the present invention, the inner portion, one of which is fixed within the outer portion, the other is rotated, and the rotating unit supports rotary bearing is interposed between the two, given rotary bearings at each rotating according to the speed based on adjusting the lubricating oil supply amount per once a lubricating oil supply method in the rotary unit support, immediately after the completion of the supply of lubricating oil stage The upper limit value of the lubricating oil supply amount per time at each of the predetermined rotational speeds at which the temperature of the oil does not rise is confirmed by experiment , and the predetermined amount of lubricating oil supply amount per time according to the upper limit value is dividing the time until immediately before the temperature increase caused by continuing rotation at a rotational speed, after setting the maximum time interval, with respect to a time interval shorter than the maximum time interval, by the maximum time interval And once By performing multiplication by the upper limit value of the supply amount per unit, the lubricant supply method in the rotating part support is based on the minimum value of the supply amount of lubricant per unit corresponding to the short time interval.

  In the present invention having the above-described configuration, it is possible to supply a reasonable and appropriate lubricating oil, thereby preventing an accident due to wear of the rotary bearing and realizing a safe operation of the rotary bearing over a long period of time. .

In particular, when the apparatus of Example 1 as will be described later is used, it can be appropriately applied to the supply of the lubricating oil of the present invention, and can be appropriately treated even for a lubricating oil having a large adhesive force such as grease. Is possible,
When the system according to the second embodiment as described later is adopted, a very economical operation can be performed by one computer for a plurality of rotary bearings.

  Thus, the present invention has many advantages and its value is tremendous.

  As shown in FIG. 4, the rotating part support that realizes the method of the present invention includes a rotating part support (in the case of FIG. 4A) composed of a fixed body 2 on the outer part and a rotating body 1 on the inner part, and The rotating part support body (in the case of FIG. 4 (a)) including the outer part rotating body 1 and the inner part fixing body 2 is configured, but in either case, the rotating body 1 and the fixing body. 2 and the rotary bearing 3 is interposed between them.

In the present invention, the time interval for supplying the lubricating oil per time is made constant, and the supply amount of the lubricating oil per time corresponds to each predetermined rotational speed in the rotary bearing 3 . It is characterized in that it is adjusted.

Actually, a command based on an appropriate amount of lubricating oil supplied per time stored in the memory 51 is transmitted to the lubricating oil supply device 4 by the computer 5 corresponding to each predetermined rotational speed of the rotating body 1 . It will be.

In each of the rotary bearings 3, an appropriate supply amount per one time for supplying the lubricating oil corresponding to each predetermined rotation speed is not determined by an experiment involving trial and error, but is appropriate according to a specific theory. The supply cannot be determined at once.

  Needless to say, the appropriate supply amount per one time has a certain range and is not limited to a specific value.

  On the other hand, there is a correlation between the supply time interval and the supply amount per time, and the shorter the time interval, the smaller the supply amount per time, and both are in a generally proportional relationship.

If the supply amount of lubricating oil per one time corresponding to each predetermined rotational speed is too large, the presence of the lubricating oil in the rotary bearing itself causes friction, and at the stage immediately after the supply ends . The temperature of the rotary bearing rises.

Therefore, the upper limit value of the supply amount of lubricating oil per time corresponding to each rotary bearing 3 is such that the temperature rise does not occur on the basis of whether or not the temperature rise immediately after the supply is finished. The upper limit value of the supply amount of the lubricating oil per time is confirmed in advance by experiments .

In the case where the above confirmation is performed, when the lubricant is supplied at the upper limit value and the rotation of the rotary bearing 3 is continued at each predetermined speed, the time immediately before the temperature rise is the maximum time. Can be set with interval.

  However, the time interval and the supply amount per time that can be set for a predetermined rotation speed are not limited to the maximum time interval and the upper limit value of the supply amount.

  That is, it is sufficiently possible to set a reference based on a time interval shorter than the maximum time interval and to set an appropriate supply condition with a supply amount smaller than the upper limit value of the supply amount.

The amount of supply per time corresponding to a time interval shorter than the maximum time interval,
It is possible to calculate by the time interval set as a reference / maximum time interval × the upper limit value of the supply amount per one time.

  This is because the time interval for supplying the lubricating oil per time and the supply amount of the lubricating oil per time are in a substantially proportional relationship.

  The supply amount per time calculated by the above calculation corresponds to the appropriate minimum value of the supply amount per time in the target time interval as long as the division by the maximum time interval is performed.

  The upper limit value can be set as a maximum value of the supply amount of lubricating oil per time corresponding to a predetermined rotational speed.

Therefore, when the time interval based on a time interval shorter than the maximum time interval is set as a reference, the supply amount of lubricating oil per one time based on the minimum value according to the calculation formula and the one time per time based on the maximum value. The supply amount of the lubricating oil per time, which is an intermediate value with the supply amount of the lubricating oil, can be used as an appropriate supply amount of the lubricating oil.

  The specific configuration of the present invention will be described below with reference to examples.

  In Example 1, the structure of the suitable lubricating device in this invention is shown.

  That is, in the first embodiment, as shown in FIG. 1, the ratchet 42 is rotated by the air cylinder 41 that moves the ratchet pawl 46, and the piston 43 at the tip of the screw 47 is slightly moved by the screw 47 at the center of the ratchet 42. Thus, by discharging a small amount of lubricating oil, it is possible to supply the lubricating oil per time corresponding to a predetermined time interval.

  It is also possible to place a gear instead of the ratchet 42 and rotate it with a pulse motor via the gear.

  As shown in FIG. 1, when the flow rate adjustment valve 44 is provided in the operation circuit of the air cylinder 41, the supply of the lubricating oil can be made slow.

  Such a slow supply state is particularly effective when a lubricating oil having a high viscosity such as grease is used.

  That is, when supplying a high-viscosity lubricating oil such as grease, the required amount cannot be completely removed due to the resistance of the piping system due to the rapid operation of the piston 43, as shown in FIG. When the air is supplied by the flow rate adjusting valve 44 over time, the necessary amount can be completely discharged.

  In the second embodiment, as shown in FIG. 3, a plurality of rotating unit supports, and further a plurality of rotating bearings 3 thereby are used by a single computer 5 for a time interval and one time as in the second embodiment. This system has a feature in that a system for commanding the supply amount is calculated, thereby overcoming the uneconomic situation of setting individual computers 5 for a plurality of rotary bearings 3.

  However, the computer 5 cannot simultaneously receive and calculate a signal representing the rotational speed from each of the plurality of rotary bearings.

  In the second embodiment, a single computer 5 is installed for each of a plurality of rotary bearings 3 via an identification circuit 6, and each rotary bearing 3 receives a signal indicating a rotational speed and an identification signal for the identification circuit 6. The identification circuit 6 is provided with a circuit part for discriminating the front-rear relationship of the time when each signal is input.

  Then, when the signals are received at different times, according to the order of reception, the signals are once stored in the memory 51 or sent to the computer 5 without passing through the steps. When some or all of the signals are received at the same time, a signal indicating the rotational speed and the identification signals received at the same time are stored in the memory 51, and then simultaneously in accordance with a sequence determined in advance by a program. The order of the received input signals from the rotary bearings 3 is determined, and the signals received at the same time are transmitted to the computer 5 according to the order.

  The computer 5 calculates an appropriate supply amount of the lubricating oil per time to supply the lubricating oil based on the signal representing the speed of each rotary bearing 3 sequentially transmitted by the identifying circuit 6, and the identifying circuit 6. An output signal based on the calculation result can be transmitted to each rotary bearing 3 based on the identification signal sent from.

  In the second embodiment, even if signals representing rotational speeds are simultaneously input from a plurality of rotary bearings 3, signals and rotational signals representing rotational speeds are sequentially sent to the computer 5 in a predetermined order in the identification circuit 6. Is input and a predetermined calculation process is performed, so that there is no particular problem in controlling an appropriate supply amount per time.

  INDUSTRIAL APPLICABILITY The present invention can be widely used as a method for supplying lubricating oil in a rotating part support that is employed in various fields.

1 shows a lubricating oil supply apparatus according to a first embodiment, where (a) is a sectional side view in the injection direction of lubricating oil, and (b) is a sectional side view in a direction orthogonal to the injection direction. FIG. 3 is a block diagram illustrating a second embodiment. It is a sectional side view which shows the structure of the rotation part support body which applies the method of this invention, (a) shows the case where a rotary body is provided in an inner part, (b) shows the case where a rotary body is provided in an outer part Indicates.

DESCRIPTION OF SYMBOLS 1 Rotating body 2 Fixed body 3 Rotating bearing 30 Rotating bearing speed signal generator 4 Lubricating oil supply device 41 Air cylinder 42 Ratchet 43 Piston 44 Flow control valve 45 Solenoid valve 46 Ratchet claw 47 Screw 5 Computer 51 Memory in computer 6 Identification circuit

Claims (5)

In a rotating part support in which one of the inner part and the outer part is fixed, the other rotates, and a rotary bearing is interposed between the two parts, the lubricating oil per one time according to each predetermined rotational speed based on adjusting the supply amount, a lubricating oil supply method in the rotary unit support, wherein each of the predetermined rotational speed such that the temperature of the rotary bearings does not increase the supply at the terminated immediately after stage of the lubricating oil The upper limit value of the amount of lubricating oil supplied per time is confirmed by experiment, and the temperature rise is increased by continuing the rotation at a predetermined rotational speed with respect to the amount of lubricating oil supplied per time based on the upper limit value. the time until just before that occurs, after setting the maximum time interval, the relative maximum of the time interval shorter than the time interval, performs division by the maximum time interval, and the upper limit of the supply amount of the per Do multiplication by value Thus, the lubricating oil supply method in the rotating part support is based on the minimum value of the lubricating oil supply amount per time corresponding to the short time interval. And once per lubricating oil due to the upper limit value according to claim 1, wherein in Claim 1 short time interval stated, once per by an intermediate value between the supply amount of one time per the lubricating oil by the minimum value according to claim 1, wherein The method for supplying lubricating oil in a rotating part support according to claim 1, wherein the amount of lubricating oil supplied is selected.   2. A lubricating oil discharge device is provided by rotating a rotating screw by a ratchet rotating based on an air cylinder or a gear rotating by a pulse motor and moving a piston at the tip of the rotating screw. Lubricating oil supply method for the rotating part support of the present invention.   4. The method for supplying lubricating oil in a rotating part support according to claim 3, wherein a flow rate adjusting valve is provided in a path for supplying the pump to the air cylinder for rotating the ratchet to adjust the supply speed of the lubricating oil.   For each of the plurality of rotary bearings, one computer is installed via an identification circuit, and each rotary bearing sends a signal indicating the rotation speed and an identification signal to the identification circuit. Is provided with a circuit portion for determining the context of the input timing, and when receiving each of the above signals at different times, according to the order of reception, the process of storing each of the signals once in a memory, Or, when the process is sent to the computer without passing through the process, and when some or all of the signals are received at the same time, the signal indicating the rotational speed and the identification signals received at the same time are stored in the memory. In addition, the order of the input signals from the rotary bearings received at the same time is determined according to the order predetermined by the program, and the signals received at the same time according to the order are processed by the computer. The computer calculates the appropriate amount of lubricating oil per one time to supply the lubricating oil based on the signal representing the speed of each rotary bearing sent from the identification circuit, and identifies 2. The method for supplying lubricating oil in a rotating part support according to claim 1, wherein an output signal based on the calculation result is transmitted to each rotary bearing based on an identification signal sent from a circuit.

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