JP4683871B2 - 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.

In order to solve the above problems, the structure of the present invention is a rotating part support in which one of an inner part and an outer part is fixed, the other rotates, and a rotating bearing is interposed between the two. A method for supplying lubricating oil in a rotating part support based on adjusting the amount of lubricating oil supplied per rotation in accordance with the rotation speed after adjusting the time interval for supplying lubricating oil per time. In accordance with the number of rotations of each rotary bearing, both supply amounts of lubricating oil per one corresponding to a plurality of rotational speeds are stored in advance, and the actual amount generated in the rotary bearing Compared to the rotational speed based on the input signal, among the rotational speeds stored in advance, the input signal based on the rotational speed, compared to the minimum rotational speed and the rotational speed based on the input signal. To maximum value of small rotation speed By performing proportional distribution calculation based on the difference from the rotation speed by the input signal with reference to the corresponding one-time supply quantity in the vehicle, the supply amount of the lubricating oil per rotation is calculated based on the rotation speed by the input signal. In the lubricating oil supply method in the rotating part support body that calculates and commands the lubricating oil supply device, one computer is installed via an identification circuit for each of the plurality of rotary bearings. A signal representing the rotational speed and an identification signal are sent to the identification circuit, and the identification circuit includes a circuit portion for determining the front-to-back relationship of the time when each signal is input, and when each signal is received at a different time , according to the order of the reception, the addition to send signals to the computer through a step of storing once in memory, some or all of the above signals when receiving the same period, the same time After storing the signal indicating the rotational speed transmitted and each identification signal in the memory, the order of the input signals from the rotary bearings received at the same time is determined according to the order determined in advance by the program, and received at the same time according to the order. Each of the signals is transmitted to a computer, and the computer distributes the apportioning amount as 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 sent from the identification circuit. From the lubricating oil supply method in the rotating part support that performs proportional calculation and transmits an output signal based on the calculation result to each lubricating oil supply device corresponding to each rotary bearing based on the identification signal sent from the identification circuit Become.

In the present invention configured as described above, it is possible to supply a reasonable and appropriate lubricating oil, thereby preventing accidents due to wear of the rotary bearing and realizing safe operation of the rotary bearing over a long period of time. , to various rotational speeds, it allows automatic control by the supply amount and Do Ri, yet with respect to a plurality of rotary bearing, it is possible to extremely economical operation by a single computer.

In particular, in the case of an apparatus according to an embodiment described later, it can be appropriately applied to supply of the lubricating oil of the present invention, and appropriate processing can be performed even for lubricating oil having a large adhesive force such as grease .

  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 is adjusted in accordance with the speed of the rotary bearing 3. It has characteristics.

  Actually, in accordance with the rotational speed of the rotating body 1, 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. .

  In each rotary bearing 3, an appropriate supply amount per one time for supplying lubricating oil corresponding to a predetermined rotational speed is not determined by an experiment involving trial and error, but is appropriately supplied according to a specific theory. The amount 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.

  On the basis of the above approximate proportional relationship, in the present invention, in order to automate the lubricating oil supply method, an appropriate one-time lubricating oil for any rotational speed generated in the individual rotary bearing 3. The supply amount is calculated by the computer 5.

As such a calculation method, an appropriate time interval and an appropriate supply amount per time are set in advance for a plurality of rotational speeds, and the rotary bearing 3 receives an input signal at a specific rotational speed (ω). 2 is sent to the computer 5, as shown in the graph of FIG. 2, among the stored rotational speeds, the rotational speeds on both sides closest to the rotational speed related to the input signal, that is, the input The maximum value ω ₁ of the rotation speeds smaller than the rotation speed applied to the signal and the minimum value ω ₂ of the rotation speeds larger than the rotation speed applied to the input signal are selected, and the appropriate value corresponding to the rotation speed ω ₁ is selected. When the supply amount per one time is V ₁ and the appropriate supply amount per one time corresponding to the rotation speed ω ₂ is V ₂ , the appropriate one time corresponding to the rotation speed ω ₀ related to the input signal is given. supply amount V ₀ which per are shown in Figure 2 As such,
(V ₂ −V ₀ ) / (V ₀ −V ₁ ) = (ω ₂ −ω ₀ ) / (ω ₀ −ω ₁ )
To calculate by proportional distribution, and after all,
V ₀ = {V ₁ (ω ₂ −ω ₀ ) + V ₂ (ω ₀ −ω ₁ )} / (ω ₂ −ω ₁ )
Get.

  By such proportional proportional calculation, it is actually possible to set an appropriate supply amount per time for various rotational speeds, and this point has been empirically found.

In the present invention , as shown in FIG. 3, with respect to a plurality of rotating part supports, and further to a plurality of rotating bearings 3 thereby , the supply amount per one time is calculated by the proportional proportional calculation by one computer 5. The system is characterized in that it employs a commanding system, thereby overcoming the uneconomic situation of setting a separate computer 5 for each of the 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 present invention , one computer 5 is installed for each of the plurality of rotary bearings 3 via the identification circuit 6, and each rotary bearing 3 sends a signal indicating the rotational speed and an identification signal to the identification circuit 6. The identification circuit 6 is provided with a circuit portion for discriminating the front-rear relationship of the time when each signal is input.

When the signals are received at different times, the signals are sent to the computer 5 through a step of storing the signals once in the memory 51 according to the order of reception, and part or all of the signals are transmitted. When the signals are received at the same time, the signals representing the rotational speed and the identification signals received at the same time are stored in the memory 51, and then input from the rotary bearings 3 received at the same time in accordance with a sequence predetermined by the program. The order of the signals is determined, and the signals received at the same time are transmitted to the computer 5 according to the order.

The computer 5 performs the proportional distribution calculation as an appropriate supply amount of the lubricating oil per time in order to supply the lubricating oil based on the signal representing the speed of each rotary bearing 3 sequentially transmitted by the identification circuit 6, And based on the identification signal sent from the identification circuit 6, the output signal based on the said calculation result can be transmitted with respect to each rotary bearing 3. FIG.

As described above , in the present invention , even if signals indicating the rotational speed are simultaneously input from the plurality of rotary bearings 3, the signal indicating the rotational speed and the identification signal are sequentially input to the computer 5 according to a predetermined order in the identification circuit 6. There in the order entered and stored in the memory 51, since the treatment with the pro rata calculation is performed, does not occur special hindrance to the proper supply amount control per.

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

In the embodiment , a configuration of a preferred lubricating device in the present invention is shown.

In other words, in the 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. 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.

  INDUSTRIAL APPLICABILITY The present invention can be used in 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 an embodiment , where (a) is a sectional side view in the injection direction of the lubricating oil, and (b) is a sectional side view in a direction orthogonal to the injection direction. It is a graph explaining performing proportional distribution calculation in the present invention. The block diagram explaining this invention is shown. 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 (3)

Do not adjust the time interval for supplying lubricating oil per time 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 them. A lubricating oil supply method for a rotating part support based on adjusting the amount of lubricating oil supplied per rotation according to the rotational speed, in accordance with the rotational speed of each rotary bearing. In addition, both the supply amount of the lubricating oil per time corresponding to each of a plurality of rotational speeds are stored in advance, and the input signals based on the actual rotational speed generated in the rotary bearing are stored in advance. Among a plurality of rotation speeds, each corresponding one time at a minimum value of a large rotation speed compared to the rotation speed by the input signal and a maximum value of a rotation speed small by comparison with the rotation speed by the input signal. Based on the supply amount of Then, by performing a proportional proportional calculation based on the difference from the rotational speed by the input signal, the amount of lubricating oil supplied per rotation is calculated for the rotational speed by the input signal, and the rotation commanded to the lubricating oil supply device In the method of supplying lubricating oil in the support section, a computer is installed for each of the plurality of rotary bearings via an identification circuit, and each rotary bearing receives a signal indicating the rotational speed and an identification signal for the identification circuit. The identification circuit is provided with a circuit part for discriminating the front-rear relationship of the time when each signal is input, and when the signals are received at different times, the signals are received according to the order of reception. once together through a process of storing in the memory to send to the computer, when a part or all of the above respective signals received at the same time, the signal and the identification signal indicative of the rotational speed received at the same time Are stored in the memory, the order of the input signals from the rotary bearings received at the same time is determined according to the order determined in advance by the program, and the signals received at the same time are transmitted to the computer according to the order. In order to supply the lubricating oil based on the signal representing the speed of each rotary bearing sent from the identification circuit , the proportional proportional calculation is performed as an appropriate supply amount of the lubricating oil per time, and the lubricating circuit is sent from the identification circuit. A lubricating oil supply method in a rotating part support that transmits an output signal based on the calculation result to each lubricating oil supply device corresponding to each rotary bearing based on the identification signal.   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.   3. The method of supplying lubricating oil in a rotating part support according to claim 2, wherein a flow rate adjusting valve is provided in a path for supplying a pump to an air cylinder for rotating the ratchet to adjust the supply speed of the lubricating oil.

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