JP3918809B2 - Support device for balance adjustment of rotating body - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support device for adjusting the balance of a rotating body, and is capable of correcting the balance of a heavy rotating body with high accuracy by supporting it in a floating state with an incompressible fluid such as lubricating oil. .

  Rotating bodies, such as turbine impellers, compressor impellers, flywheels, automobile wheels, etc., normally rotate the rotating body alone to eliminate unbalance due to manufacturing tolerances and assembly tolerances. The balance correction is performed to measure the unbalance amount and correct it.

  With regard to such a balance correction method for a rotating body, Patent Document 1 discloses that even a rotating body that does not have an inherent support portion is rotated without using an auxiliary shaft or an auxiliary spindle at the time of balance correction. A balance tester has been proposed as a balance correction device that can perform this.

  In this balance testing machine 1, as shown in FIG. 5, a vibration bridge 4 is supported on the apparatus base 2 via a support spring 3, and a support journal 5 serving as a support mandrel is fixed to the vibration bridge 4 in the vertical direction. It is.

  The support journal 5 is formed with a fluid supply hole 6 whose upper end is closed at the center, and a plurality of radial outflow holes 7 are provided on the upper and lower radial planes in communication with the fluid supply hole 6. In addition, a compressive fluid such as air is supplied and flows out.

  Further, a plate 8 is integrally provided at a right angle to the lower end portion of the support journal 5, a plurality of sub-holes 9 are formed in the plate 8, open on the upper surface, communicated by an internal annular channel 10, air, etc. The compressible fluid is supplied and flows out.

In this balance testing machine 1, the support journal 5 is mounted so that the hole 12 of the rotating body 11 is inserted, and a compressive fluid such as air is allowed to flow out from the outflow hole 7 and the auxiliary hole 9, thereby supporting in a floating state. By rotating along the supporting journal 5 fixed in this state, an unbalance force transmitted to the vibration bridge 4 is measured and a balance test is performed.
Japanese Examined Patent Publication No. 4-40650

  In this balance testing machine, in order to stably rotate the rotating body 11 along the support journal 5, the gap between the plate 8 and the rotating body 11 (rather than the gap between the support journal 5 and the hole 12 of the rotating body 11 ( The flying height) must be large, and if it is reversed, it rotates with reference to the bottom surface 13 of the rotating body 11 and the necessary unbalance amount cannot be measured.

  Therefore, looking at the pressure distribution of a compressible fluid such as air acting between the bottom surface 13 of the rotating body 11 and the plate 8 that generates such a levitation force, first, the fluid from the sub-hole 9 is simplified for simplification. 6B, when the flying height of the rotating body 11 is small, the bottom surface of the plate 8 and the rotating body 11 is compared with the area A due to the gap between the support journal 5 and the hole 12 as shown in FIG. The area B due to the gap with the area 13 is small, the inlet part from the area A to the area B becomes a nozzle, and the negative pressure part 14 is generated by rapid expansion.

  For this reason, since the rotating body 11 cannot be sufficiently lifted by the suction action of the negative pressure portion 14, when the air supply pressure is increased, the area A becomes smaller than the area B as shown in FIG. The negative pressure portion 14 suddenly disappears from the state shown by the broken line to the state shown by the solid line, the levitation force suddenly increases, and the rotating body 11 jumps up.

  Further, when air or the like is caused to flow out from the sub-hole 9 on the plate 8, the pressure between the plate 8 and the bottom surface 13 of the rotating body 11 is increased as shown by a one-dot chain line in FIG. In this case, although the levitation force can be increased, the air flowing out from the sub-hole 9 tends to flow toward the outer periphery of the plate 8 with less resistance, and the negative pressure portion 14 is generated on the outer peripheral side of the sub-hole 9 and is heavy. The rotating body 11 and the large rotating body 11 have a problem that a gap due to sufficient levitation force cannot be secured.

  On the other hand, it is conceivable to use a liquid incompressible fluid such as lubricating oil instead of a gas compressive fluid such as air so that the nozzle effect does not occur, and thus it is easy to support the weight of the rotating body 11. However, since the viscosity and the surface tension are larger than those of a gas compressive fluid such as air, the rotational resistance by filling the narrow gap between the support journal 5 and the hole 12 of the rotating body 11 increases, and the necessary balance correction is required. In order to obtain the rotational speed, a large rotational force is required. For example, in the configuration of FIGS. 5 and 6, the rotational driving fluid force becomes too large, and the rotating body 11 is easily eccentric with respect to the support journal 5. Problem arises.

  The present invention has been made in view of the problems of the prior art. Using an incompressible fluid, even a heavy rotating body can stably float and be supported and rotated without being eccentric. An object of the present invention is to provide a support device for correcting the balance of a rotating body.

In order to solve the above-mentioned problems, the balance-correcting support device for a rotating body according to claim 1 of the present invention is configured so that a rotating body provided with a rotating support hole with a bottom coaxially connected to the center of rotation and communicated with the bottom end surface in a vertical direction. This is a support device for correcting the balance of a rotating body provided in a balance correction device that measures the unbalance force by attaching and detachably supporting the rotating body, and can rotate the rotating body in a floating state around a vertical axis. a journal bearing including a mandrel for supporting the providing a thrust bearing for supporting at the bottom floating state of the rotating body to the lower end of the mandrel is provided, between the rotary bearing hole of the rotating body and the mandrel A first fluid supply passage for supplying an incompressible fluid for journal support is provided, and at least one of the mandrel and the rotation support hole is a space that widens other than the support portion. A second fluid supply path for supplying a non-compressed fluid for floating body rotation to the thrust support portion facing the bottom of the rotating body, and communicating with the space portion to provide an incompressible fluid inside A first discharge passage for discharging the fluid, and an opening above the uppermost support portion between the mandrel and the rotation support hole to discharge the incompressible fluid and to lift the bottom portion of the rotation support hole The second discharge path is provided so that the influence of the above can be avoided .

According to this rotating body balance correcting support device, a rotating body that is communicated with the bottom end surface, is coaxial with the center of rotation, and has a rotating support hole with a bottom is mounted from the vertical direction so that it can be detachably supported and rotated. A support device for correcting the balance of a rotating body provided in a balance correcting device for measuring an unbalanced force, comprising a journal support portion including a mandrel for rotatably supporting the rotating body in a floating state around a vertical axis. the bottom of the rotating body at a lower end portion provided with a thrust bearing for supporting in a floating state, the first fluid supplied to the non-compressive fluid for the journal bearing between the rotating bearing bore of the rotary member and the mandrel provided with a supply path, the space portion to widen the non-bearing portion on at least one of said rotary bearing bore and the mandrel provided, opposite the bottom of the rotary body the A second fluid supply passage supplying the non-compressive fluid for the rotary body floating in the last bearing provided with and communicates providing a first discharge path for discharging the non-compressible fluid within said space portion, and said mandrel A second discharge passage is provided that opens above the uppermost support portion between the rotation support holes and discharges the incompressible fluid to avoid the influence of the floating force on the bottom portion of the rotation support holes. A rotating body with a bottomed rotating support hole is separated into a journal support part and a thrust support part, and the incompressible fluid from the fluid supply path is allowed to flow out to the thrust support part, which is heavy. The rotating body also supports the weight and floats, and the journal support part is provided with a space part in addition to the support part so that the incompressible fluid supplied from the fluid supply path acts only on the support part necessary for the support. And ensure sufficient flying height Moni, and it can be rotated stably by preventing the eccentricity by increasing the rigidity of the journal bearings.

Furthermore, as the provision of the rotary body second fluid supply passage supplying the non-compressive fluid for the rotary body floating in the thrust bearing portion to the bottom portion and opposite, supplies uncompressed請流body more securely to the thrust bearing It is possible to increase the rigidity at the journal support portion to prevent eccentricity and to rotate stably.

In addition, by providing a discharge passage that communicates with the space portion and discharges the incompressible fluid inside, and by discharging the incompressible fluid in the space portion from the discharge passage, only the support portion necessary for further support is provided. An incompressible fluid can be applied, and the rigidity at the journal support can be increased to prevent eccentricity and to rotate stably.

Furthermore, a non-compressed flow that opens above the uppermost support part between the mandrel and the rotary support hole is provided to discharge a non-compressible fluid and flows out above the uppermost support part. Compressive fluid can also be discharged from the second discharge path, and even when the rotation support hole of the rotating body is bottomed and does not penetrate, incompressible fluid can be discharged. You can prevent and balance correction.

According to a second aspect of the present invention, in addition to the structure of the first aspect , the rotating body balance correcting support device forcibly discharges the incompressible fluid into the discharge passage and / or the second discharge passage. It is characterized in that a discharging means is provided.

  According to the rotating body balance correcting support device, the discharge path and / or the second discharge path is provided with discharge means for forcibly discharging the incompressible fluid. By providing a discharge means in the path and forcibly discharging the incompressible fluid, only the necessary portions are supplied and supported, and the balance can be corrected by preventing scattering and leakage.

Furthermore, the rotating body balance correcting support device according to claim 3 of the present invention is the recovery means for recovering the incompressible fluid so as to oppose the outer periphery of the thrust support portion in addition to the structure of claim 1 or 2. Is provided.

  According to the rotating body balance correcting support device, a recovery means for recovering the incompressible fluid is provided so as to face the outer periphery of the thrust support portion, and the incompressible fluid from the thrust support portion is recovered. It can be recovered by means, and it is possible to correct the balance by preventing scattering and leakage.

According to a fourth aspect of the present invention, in addition to the structure according to any one of the first to third aspects, the rotating body balance correcting support device is incompressible between the thrust support portion and the rotating body. An annular protrusion for holding the fluid is provided.

  According to this rotating body balance correcting support device, an annular protrusion for holding an incompressible fluid is provided between the thrust supporting portion and the rotating body, and the thrust supporting portion is incompressible. The fluid can be held more reliably, and even a heavy rotating body can be lifted and the balance can be corrected.

Furthermore, a rotating body balance correcting support device according to a fifth aspect of the present invention includes an annular groove in a tip portion of the fluid supply path of the journal support portion in addition to the structure according to any one of the first to fourth aspects. Is provided.

  According to this rotating body balance correcting support device, an annular groove is provided at the tip of the fluid supply path of the journal support portion, and an incompressible fluid is supplied from the annular groove to the entire circumference of the journal support portion. It is possible to flow out, and more reliably prevent eccentricity and the like, and the balance can be corrected by rotating along the journal support portion.

According to the balance adjusting support device for a rotating body according to claim 1 of the present invention, the rotating body that is connected to the bottom end surface, is coaxial with the center of rotation, and has a rotating support hole with a bottom is attached and detached from the vertical direction. A journal device provided with a mandrel for rotatably supporting the rotating body in a floating state around a vertical axis, in a supporting device for correcting the balance of a rotating body provided in a balance correcting apparatus that can be supported and rotated to measure an unbalance force a bearing portion is provided, the thrust bearing for supporting in floating state bottom of the rotary member to the lower end of the mandrel is provided, incompressible for journal bearing between the rotating bearing bore of the rotary member and the mandrel provided with a first fluid supply passage for supplying a fluid, provided with a space portion to widen the non-bearing portion on at least one of said rotary bearing bore and the mandrel, the rotating body A second fluid supply passage supplying the non-compressive fluid for the rotary body floating in the thrust bearing portion to the bottom facing is provided, providing a first discharge path for discharging the non-compressible fluid inside communicates with the space And a second opening that is opened above the uppermost support portion between the mandrel and the rotation support hole to discharge the incompressible fluid and to prevent the influence of the floating force on the bottom portion of the rotation support hole. Since the discharge path is provided , the rotating body is separated into the journal bearing part and the thrust bearing part, and the incompressible fluid from the fluid supply path is allowed to flow out to the thrust bearing part. It is possible to float while supporting the weight. In the journal support part, a space part is provided in addition to the support part, and the incompressible fluid supplied from the fluid supply path is allowed to act only on the support part necessary for support. Jar can be ensured flying height The rigidity at the null bearing can be increased to prevent eccentricity and rotate stably.

Furthermore , since the second fluid supply passage for supplying the non-compressed fluid for floating the rotor is provided in the thrust support portion facing the bottom of the rotor, the non-compressed fluid is more reliably supplied to the thrust support portion. It can be supplied, and can be rotated stably by preventing the eccentricity by increasing the rigidity at the journal support portion.

In addition , since a discharge path for discharging the incompressible fluid inside is provided in communication with the space section, the support section necessary for further support can be obtained by discharging the incompressible fluid in the space section from the discharge path. Thus, an incompressible fluid can be applied only to the shaft, and the rigidity at the journal support portion can be increased to prevent eccentricity and to rotate stably.

Further , since the second discharge passage for discharging the incompressible fluid is provided by opening above the uppermost support portion between the mandrel and the rotary support hole, the second discharge passage flows out above the uppermost support portion. Incompressible fluid can also be discharged from the second discharge path, and even when the rotation support hole of the rotating body is bottomed and not penetrated, the incompressible fluid can be discharged. The balance can be corrected.

According to the balance adjusting support device for a rotating body according to claim 2 of the present invention, the discharge means for forcibly discharging the incompressible fluid is provided in the discharge path and / or the second discharge path. Therefore, by providing discharge means in the discharge path and the second discharge path to forcibly discharge the incompressible fluid, it supplies and supports only the necessary parts, and also prevents balance and leakage to correct the balance. It can be performed.

Further, according to the rotating body balance correcting support device according to claim 3 of the present invention, the recovery means for recovering the incompressible fluid is provided so as to oppose the outer periphery of the thrust support portion. The incompressible fluid from the part can be recovered by the recovery means, and the balance can be corrected by preventing scattering and leakage.

According to the rotating body balance correcting support device according to claim 4 of the present invention, an annular projection for holding an incompressible fluid is provided between the thrust support portion and the rotating body. Therefore, the incompressible fluid can be more reliably held in the thrust support portion, and even a heavy rotating body can be lifted reliably and the balance can be corrected.

Furthermore, according to the support device for balance of rotating body according to claim 5 of the present invention, since the annular groove is provided at the tip of the second fluid supply path of the journal support portion, The incompressible fluid can flow out from the annular groove all around the circumference, and it is possible to correct the balance by rotating along the journal support portion more reliably while preventing eccentricity.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 and 2 relate to a basic structure of a balance adjusting support device for a rotating body according to the present invention. FIG. 1 is a schematic configuration diagram with a part cut away, and FIG. 2 is a partially enlarged sectional view.

  The rotating body balance correcting support device 20 (hereinafter simply referred to as the supporting device 20) is a balance correcting support device that is provided in a balance correcting device that measures an unbalance force and that rotates and supports the rotating body. Thus, for example, by providing the support journal 5 and the plate 8 provided in the vibration bridge 4 of the balance correction apparatus 1 already described with reference to FIG. It is supported in a rotatable state.

  The support device 20 is provided with a journal support portion 22 including a mandrel 21 that rotatably supports the rotating body 11 in a floating state around a vertical axis, and a bottom portion 13 of the rotating body 11 is provided at a lower end portion of the mandrel 21. A disk-shaped plate 24 that constitutes a thrust support portion 23 that is supported in a floating state is integrally provided, and this plate 24 is fixed to the vibration bridge 4.

  In this bearing device 20, the journal bearing part 22 that supports the rotation support hole 12 of the rotating body 11 in the mandrel 21 so as to be rotatable around the vertical axis is provided with support parts 25 a and 25 b above and below. The portion has a small diameter, and when the rotation support hole 12 of the rotating body 11 is mounted, a space portion 26 is formed between the upper and lower support portions 25a and 25b.

  In order to form the space portion 26, the space portion 26 is formed not only when the upper and lower support portions 25a and 25b of the mandrel 21 have a small diameter, but the inner diameter portion of the rotation support hole 12 of the rotating body 11 has a large diameter. Alternatively, these may be formed in combination. Further, the number of support portions is not limited to two at the top and bottom, and may be further increased.

  The upper and lower support portions 25 a and 25 b of the mandrel 21 are formed with a plurality of outflow holes 27 that are open on the outer periphery of the mandrel 21 on a horizontal plane, and are formed in an outer annular shape that is doubled along the central axis of the mandrel 21. The first fluid supply path 28 communicates with the first fluid supply path 28 and is supplied with a non-compressible fluid for floating, such as lubricating oil.

In addition, in this bearing device 20, an annular groove 29 that communicates the tip end portions of the outflow holes 27 of the upper and lower bearing portions 25a, 25b is formed so that an incompressible fluid can be uniformly supplied to the periphery.
The annular groove 29 may be omitted.

  Accordingly, the lubricating oil supplied to the first fluid supply path 28 on the outer peripheral side of the double flow path is caused to flow out from the outflow hole 27 and the annular groove 29, and the mandrel 21 and the rotation support hole 12 of the rotating body 11 are connected. When the bearings 25a and 25b are supplied between the rotating body 11 and the mandrel 21 in a non-contacting manner with a small gap, the rotating body 11 is supported by the pressure of lubricating oil of an incompressible fluid. Become.

  On the other hand, in this bearing device 20, the non-compressed clean fluid supplied to the journal bearing portion 22 flows between the disk-shaped plate 24 constituting the thrust bearing portion 23 and the bottom portion 13 of the rotating body 11 and rotates. The body 11 is supported in a floating state.

  In this way, the incompressible fluid is caused to flow from the journal support portion 22 to the thrust support portion 23. However, unlike the case of the compressible fluid, rapid volume expansion does not occur, and negative pressure is generated due to the nozzle effect. Of course, the rotating body 11 is floated on the plate 24 by the pressure of the lubricating oil of the incompressible fluid, and a predetermined flying height larger than the gap of the journal support portion 22 can be obtained.

  Further, in this bearing device 20, a discharge passage 30 is provided at the center of the mandrel 21 for discharging the incompressible fluid supplied to the space portion 26 between the upper and lower bearing portions 25 a and 25 b of the journal bearing portion 22. The communication hole 31 communicates with the space portion 26 and can be discharged to the outside.

  Thereby, the pressure in the support portions 25 a and 25 b can be increased from the space portion 26 to increase the rigidity, and the rotating body 11 can be rotated along the central axis of the mandrel 21.

Similarly, in order to discharge the incompressible fluid flowing upward from the upper support portion 25a, a communication hole 32 is formed above the upper support portion 25a, so that the second discharge path 33 is also used as the discharge path 30. Is extended upward.
Thereby, the influence of the pressure of the lubricating oil above the support portion 25a can be prevented from decentering the rotating body 11, and the scattering of the lubricating oil when the rotating support hole 12 of the rotating body 11 is a through hole can be prevented. .

  Further, in this bearing device 20, since the incompressible fluid that has flowed into the thrust bearing portion 23 leaks from the outer peripheral portion of the plate 24, a recovery groove 34 is provided in an annular shape as recovery means for recovering this. .

  As a result, the lubricating oil can be recovered and recycled, and scattering to the surroundings can be prevented.

  In the bearing device 20 configured as described above, the rotating body 11 is mounted so that the rotating support hole 12 of the rotating body 11 is inserted into the mandrel 21 of the journal supporting portion 22.

  Then, lubricating oil is supplied to the first fluid supply passage 28 as an incompressible fluid, and the incompressible fluid is caused to flow out from the annular groove 29 via the upper and lower outflow holes 27 of the mandrel 21, so that the mandrel 21 in the fixed state is discharged. On the other hand, the rotation support part 12 of the rotating body 11 is supported in a floating state.

  Similarly, a part of the lubricating oil flows into the thrust support portion 23 as an incompressible fluid supplied to the journal support portion 22 via the first fluid supply path 28, and the upper surface of the plate 24 and the rotating body 11. The pressure is maintained between the bottom portion 13 and the rotating body 11 in a floating state. Then, the lubricating oil leaking to the outer periphery of the plate 24 flows into the collecting groove 34 and is collected and circulated.

  By rotating the rotating body 11 in this state, it is possible to measure the unbalance force transmitted to the vibration bridge 4 and perform a balance test.

  Unlike the case where a compressive fluid is used in such a support device 20, volume expansion does not occur. Therefore, an incompressible fluid that flows out from the outflow hole 27 and the annular groove 29 of the journal support portion 22 to the thrust support portion 23. In addition, the negative pressure portion due to the nozzle effect is not generated, and the pressure required to float the rotating body 11 can be ensured even if the rotating body 11 is heavy due to the pressure of the lubricating oil.

  Therefore, even the heavy rotating body 11 can be sufficiently lifted and floats larger than the gap between the mandrel 21 of the journal support 22 and the rotary support 12 of the rotating body 11, and the rotating body 11 moves along the mandrel 21. By rotating 11, the normal unbalance amount can be measured.

  That is, rotation on the plate 24 with respect to the bottom portion 13 of the rotating body 11 is prevented, and the geometric axis of the rotating support portion 12 of the rotating body 11 and the outer periphery of the mandrel 21 coincide with sufficient accuracy. In this state, the rotating body 11 can be rotated, and correct balance correction accuracy can be obtained.

Next, with the reference example of the present invention will be described with reference to FIG.
In this support device 40, an incompressible fluid is directly supplied separately from the journal support portion 22 between the plate 24 of the thrust support portion 23 and the bottom portion 13 of the rotating body 11. A second fluid supply path 41 is provided, and a part of the incompressible fluid to be supplied to the journal support portion 22, for example, lubricating oil, is branched and supplied.

  Thereby, the pressure by an incompressible fluid can be ensured more reliably between the plate 24 and the bottom part 13 of the rotary body 11, and the rotary body 11 can be floated more reliably.

Moreover, in this support apparatus 40, as shown in the right half of FIG. 3, in order to hold | maintain the incompressible fluid from the 2nd fluid supply path 41 more reliably and to ensure the pressure, it is from the outer peripheral part of the plate 24. An annular protrusion 42 as a weir protruding toward the outer periphery of the bottom 13 of the rotating body 11 is formed, and a gap 43 between the protruding portion 42 and the outer periphery of the rotating body 11 is reduced, thereby a plate of incompressible fluid. The pressure can be maintained by suppressing the outflow from the outer peripheral end portion of 24.
In addition, the other structure of this support apparatus 40 is the same as the support apparatus 20 already demonstrated.

  According to the support device 40 configured in this manner, the incompressible fluid flows out from the second fluid supply path 41 between the bottom portion 13 of the rotating body 11 and the plate 24, and the outflow hole 26 of the journal support portion 22. The compressive fluid flowing out from the second fluid supply path 41 and the incompressible fluid flowing out from the second fluid supply path 41 are held between the bottom 13 of the rotating body 11 and the plate 24, and the rotating body 11 is floated. Therefore, the pressure required for this can be ensured more reliably.

  This prevents rotation on the plate 24 with respect to the bottom portion 13 of the rotating body 11, and the geometric axis between the rotation support portion 12 of the rotating body 11 and the outer periphery of the mandrel 21 is sufficiently accurate. The rotating body 11 can be rotated in a matching state, and correct balance correction accuracy can be obtained.

  Further, in this support device 40, an annular protrusion 42 is formed as a weir that protrudes from the outer peripheral portion of the plate 24 toward the outer periphery of the bottom portion 13 of the rotating body 11. The gap 43 between the outer periphery and the outer periphery is small so that the inflow of the incompressible fluid from the outer peripheral end of the plate 24 can be suppressed and the pressure can be more reliably maintained. 13 to prevent the rotating body 11 from rotating on the plate 24, and the rotating body 11 in a state where the geometrical axis centers of the rotating support portion 12 of the rotating body 11 and the outer periphery of the mandrel 21 coincide with each other with sufficient accuracy. It can rotate, and correct balance correction accuracy can be obtained.

Next, a support device 50 according to an embodiment of the present invention will be described with reference to FIG .
This support device 50 corresponds to the case where the rotary support portion 12 of the rotating body 11 is configured with a bottomed hole instead of a through hole, and the incompressible fluid supplied to the journal support portion 22 is a mandrel. Since the upper end of the communication hole 32 is disposed at the top above the uppermost support portion 25a, the second discharge passage 33 and the discharge passage of the space portion 26 communicate with each other. 30 can be discharged to the outside.

  As a result, the incompressible fluid supplied to the journal support portion 22 accumulates at the top of the mandrel 21 and the bottom portion of the rotary support portion 12, thereby causing a floating force in this portion, and the effect that the rotating body 11 is eccentric. The rotation body 11 can be rotated in a state where the geometric axis of the rotation support portion 12 of the rotation body 11 and the outer periphery of the mandrel 21 coincide with each other with sufficient accuracy, and the correct balance correction accuracy can be obtained. Obtainable.

  Further, in this support device 50, the pump 52 is used as a discharge means for forcibly discharging the discharge part 30 for discharging the incompressible fluid from the space 26 and the second discharge path 33 for discharging the incompressible fluid from the top part. Connected.

As a result, the incompressible fluid accumulated in the space portion 26 and the bottom portion of the rotation support portion 12 of the rotating body 11 and the top portion of the mandrel 21 can be forcibly sucked and discharged, and the pressure of the incompressible fluid can be discharged to these portions. It is possible to prevent the rotating body 11 from being eccentric.
In addition, the other structure of this support apparatus 50 is the same as the support apparatus 20 already demonstrated.

  According to the bearing device 50 configured as described above, even the heavy rotating body 11 can be lifted without being affected by the eccentricity due to the incompressible fluid, and the mandrel 21 and the rotating body of the journal bearing portion 22. Thus, the rotating body 11 can be rotated along the mandrel 21 and the normal unbalance amount can be measured.

As described above with reference to the basic structure and the reference example , according to the support device 20 , the balance device 1 is provided in the balance correction device 1 for measuring the unbalance force and supports and rotates the rotating body 11. The correction support device 20 is provided with a journal support portion 22 including a mandrel 21 that rotatably supports the rotating body 11 in a floating state around a vertical axis, and a bottom portion 13 of the rotating body 11 is provided at a lower end portion of the mandrel 21. While providing a thrust support portion 23 for supporting the floating body in a floating state, while providing a fluid supply path 28 for supplying an incompressible fluid for floating between the mandrel 21 and the rotational support hole 12 of the rotating body 11, and Since the space portion 26 that widens other than the support portions 25a and 25b is provided in at least one of the mandrel 21 and the rotation support hole 12, The rolling element 11 is separated and supported by the journal bearing part 22 and the thrust bearing part 23, and the incompressible fluid from the fluid supply path 28 is caused to flow out to the thrust bearing part 23, so that even the heavy rotating body 11 has its weight. The journal support portion 22 is provided with a space portion 26 in addition to the support portions 25a and 25b, and is supplied from the fluid supply path 28 only to the support portions 25a and 25b necessary for the support. A sufficient amount of flying can be secured by applying a fluid, and the rigidity at the journal support portion 22 can be increased to prevent eccentricity and to rotate stably.

  Further, according to the support device 20, the discharge path 30 that discharges the incompressible fluid inside the space portion 26 is provided so as to communicate with the space portion 26, so that the incompressible fluid in the space portion 26 is discharged from the discharge path 30. By discharging, an incompressible fluid can be applied only to the support portions 25a and 25b necessary for further support, and the rigidity at the journal support portion 22 can be enhanced to prevent eccentricity and to rotate stably. it can.

Further, according to the bearing device 40 , since the annular protrusion 42 that holds the incompressible fluid is provided between the thrust bearing portion 23 and the rotating body 11, the thrust bearing portion 23 is not compressed. As a result, even the heavy rotating body 11 can be lifted reliably and the balance can be corrected.

Furthermore, according to this bearing device 40 , since the annular groove 29 is provided at the tip of the second fluid supply path 41 of the journal bearing portion 22, the entire circumference of the journal bearing portion 22 is removed from the annular groove 29. The compressive fluid can flow out, and the balance can be corrected by rotating along the journal support portion 22 more reliably while preventing eccentricity.

Further, according to the support device 40 , the second fluid supply path 41 that supplies the non-compressed fluid for floating body rotation is provided in the thrust support portion 23 that faces the bottom portion 13 of the rotation body 11. The non-compression fluid can be supplied to the thrust bearing 23 more reliably, and the rigidity at the journal bearing 22 can be increased to prevent eccentricity and to rotate stably.

  Furthermore, according to the support device 50 of the present invention, the second discharge for discharging the incompressible fluid by positioning the opening 51 above the uppermost support portion 25a between the mandrel 21 and the rotary support hole 12. Since the passage 33 is provided, the incompressible fluid flowing out above the uppermost support portion 25a can also be discharged from the communication hole 32 and the second discharge passage 33, and the rotation support hole 12 of the rotating body 11 penetrates with a bottom. Even if not, the incompressible fluid can be discharged from the opening 51, and when penetrating, the balance can be corrected by preventing scattering and leakage.

  Further, according to the support device 50 of the present invention, the pump 52 is provided as the discharge means for forcibly discharging the incompressible fluid to the discharge path 30 and / or the second discharge path 33. 30 and the second discharge passage 33 are provided with a pump 52 as a discharge means to forcibly discharge the incompressible fluid so that only the necessary portions are supplied and supported, and the balance is achieved by preventing scattering and leakage. Corrections can be made.

  Furthermore, according to the bearing device 50 of the present invention, the recovery groove 34 is provided as a recovery means for recovering the incompressible fluid so as to face the outer periphery of the thrust support portion 23. The incompressible fluid can be recovered by the recovery groove 34 of the recovery means, and the balance can be corrected by preventing scattering and leakage.

It is a schematic block diagram which notches and shows a part concerning the basic structure of the support apparatus for balance adjustment of the rotary body of this invention. It is a partial expanded sectional view concerning the basic structure of the support apparatus for balance adjustment of the rotary body of this invention. It is a partial expanded sectional view which concerns on the reference example of the support apparatus for balance adjustment of the rotary body of this invention, and shows a different form to a right-and-left half part, respectively. It is a partial expanded sectional view concerning one embodiment of the support device for balance correction of the rotating body of this invention. It is the fragmentary sectional view and YY arrow line view of the conventional balance testing machine of a rotary body. It is explanatory drawing of the pressure distribution in the conventional rotating body balance testing machine.

Explanation of symbols

4 Vibration bridge 11 Rotating body 12 Rotating support portion 13 Bottom portion 14 Negative pressure portion 20 Rotating body balance correction support device (support device)
21 Mandrel 22 Journal support portion 23 Thrust support portion 24 Plates 25a, 25b Upper and lower support portions 26 Space portion 27 Outflow hole 28 First fluid supply passage 29 Annular groove 30 Discharge passage 31 Communication hole 32 Communication hole 33 Second discharge passage 34 Recovery Groove (collection means)
40 Support device for balance adjustment of rotating body (support device)
41 Second fluid supply path 42 Annular protrusion 43 Clearance 50 Rotating body balance correction support device 51 Opening 52 Pump (discharge means)

Claims (5)

Rotation provided in a balance correcting device that communicates with the bottom end face and that is coaxially mounted at the center of rotation and equipped with a rotating support hole with a bottom mounted in a vertical direction, removably supported and rotated to measure the unbalance force A support device for correcting the balance of the body,
Providing a journal support portion including a mandrel that rotatably supports the rotating body in a floating state around a vertical axis;
Provided at the lower end of this mandrel is a thrust support that supports the bottom of the rotating body in a floating state,
Support provided with a first fluid supply passage supplying the non-compressive fluid for journal bearing, on at least one of said rotary bearing bore and the mandrel between the rotational bearing hole of the rotating body and the mandrel Provide a space to widen other than the part,
A second fluid supply path for supplying a non-compressed fluid for floating the rotor to the thrust support portion facing the bottom of the rotor;
A first discharge passage is provided that communicates with the space portion and discharges an incompressible fluid therein, and is opened above the uppermost support portion between the mandrel and the rotation support hole to allow the incompressible fluid to flow. A bearing device for correcting balance of a rotating body, characterized in that a second discharge passage is provided for discharging and avoiding the influence of a floating force on the bottom portion of the rotating bearing hole . 2. The support device for balance correction of a rotating body according to claim 1, wherein a discharge means for forcibly discharging the incompressible fluid is provided in the discharge path and / or the second discharge path. 3. A support device for correcting balance of a rotating body according to claim 1 , further comprising recovery means for recovering the incompressible fluid so as to oppose the outer periphery of the thrust support portion. 4. The rotating body balance correcting support device according to claim 1 , wherein an annular protrusion for holding an incompressible fluid is provided between the thrust support portion and the rotating body. . 5. The rotating body balance correcting support device according to claim 1 , wherein an annular groove is provided at a tip portion of the fluid supply path of the journal support portion.

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