1. A squeeze film damper for use in an engine, comprising:
a fluid source;
a shaft extending axially through the engine and having an annular channel extending at least partially therethrough, and further including an inner surface, an outer surface, and an opening formed therebetween, the annular channel configured to receive fluid from a fluid source, the opening in communication with the annular channel and configured to receive the fluid therefrom;
a bearing assembly disposed concentric to the shaft and including an inner race coupled to the shaft, an outer race disposed concentric to the inner race, and a rolling element disposed between the inner and outer races, each of the inner and outer races including openings therethrough configured to receive fluid from the shaft opening;
a static bearing support housing at least partially coupled to and surrounding the outer race, the housing including an inner surface spaced apart from the outer race to define a clearance therebetween; and
a dam disposed adjacent the bearing assembly, the dam extending radially inwardly relative to the bearing support housing and defining a shelf for receiving the fluid from the race openings and directing the fluid into the clearance.
2. The system of claim 1, further comprising a plurality of openings formed between the inner and outer surfaces of the shaft.
3. The system of claim 1, further comprising an annular oil catcher having a mount section and a catch section, the mount section coupled to the shaft and including an axial groove formed therein, the catch section extending axially from the mount section and configured to form a space with the shaft outer surface that receives fluid from the shaft opening.
4. The system of claim 3, wherein the annular oil catcher comprises a radially inwardly extending lip forming a catch space therebetween for catching the fluid.
5. The system of claim 3, further comprising a washer disposed between the annular oil catcher and the inner race, wherein the inner race is mounted to the shaft.
6. The system of claim 1, wherein the first dam extends from the bearing support housing.
7. The system of claim 1, further comprising:
a second dam extending radially inwardly relative to the bearing support housing located aft relative to the bearing and configured to maintain at least a portion of the fluid between the dams.
8. The system of claim 7, wherein the second dam extends from the outer race.
9. The system of claim 1, wherein the bearing housing includes a radially extending damper drain opening formed therein, the damper drain opening in fluid communication with the clearance.
10. The system of claim 9, wherein the bearing housing further includes an axially extending oil scavenge slot in fluid communication with the damper drain opening.
11. A squeeze film damper for use in an engine, comprising:
a fluid source;
a shaft extending axially through the engine and having an annular channel extending at least partially therethrough, and further including an inner surface, an outer surface, and an opening formed therebetween, the annular channel configured to receive fluid from the source, the opening in communication with the annular channel and configured to receive the fluid therefrom;
an annular oil catcher having a mount section and a catch section, the mount section coupled to the shaft and including an axial groove formed therein, the catch section extending axially from the mount section and configured to form a space with the shaft outer surface that receives fluid from the shaft opening;
a bearing assembly disposed concentric to the shaft and including an inner race coupled to the shaft, an outer race disposed concentric to the inner race, and a rolling element disposed between the inner and outer races, each of the inner and outer races including openings therethrough configured to receive fluid from the shaft opening;
a static bearing support housing at least partially coupled to and surrounding the outer race, the housing including an inner surface spaced apart from the outer race to define a clearance therebetween;
a first dam disposed forward the bearing assembly, the dam extending radially inwardly relative to the bearing support housing and defining a shelf for receiving the fluid from the race openings and directing the fluid into the clearance; and
a second dam extending radially inwardly relative to the bearing support housing located aft relative to the bearing and configured to maintain at least a portion of the fluid between the first and the second dams.
12. An engine, comprising:
an engine case;
a compressor section disposed within the engine case;
a combustor section coupled to the compressor section;
a turbine section coupled to the combustor section; and
a squeeze film damper disposed in the turbine section comprising:
a fluid source;
a shaft extending axially through the engine and having an annular channel extending at least partially therethrough, and further including an inner surface, an outer surface, and an opening formed therebetween, the annular channel configured to receive fluid from the source, the opening in communication with the annular channel and configured to receive the fluid therefrom;
a bearing assembly disposed concentric to the shaft and including an inner race coupled to the shaft, an outer race disposed concentric to the inner race, and a rolling element disposed between the inner and outer races, each of the inner and outer races including openings therethrough configured to receive fluid from the shaft opening;
a static bearing support housing at least partially coupled to and surrounding the outer race, the housing including an inner surface spaced apart from the outer race to define a clearance therebetween; and
a dam disposed adjacent the bearing assembly, the dam extending radially inwardly relative to the bearing support housing and defining a shelf for receiving the fluid from the race openings and directing the fluid into the clearance.
13. The system of claim 12, further comprising an annular oil catcher having a mount section and a catch section, the mount section coupled to the shaft and including an axial groove formed therein, the catch section extending axially from the mount section and configured to form a space with the shaft outer surface that receives fluid from the shaft opening.
14. The system of claim 13, wherein the annular oil catcher comprises a radially inwardly extending lip forming a catch space therebetween for catching the fluid.
15. The system of claim 13, further comprising a washer disposed between the annular oil catcher and the inner race, wherein the inner race is mounted to the shaft.
16. The system of claim 12, wherein the first dam extends from the bearing support housing.
17. The system of claim 12, further comprising:
a second dam extending radially inwardly relative to the bearing support housing located aft relative to the bearing and configured to maintain at least a portion of the fluid between the dams.
18. The system of claim 17, wherein the second dam extends from the outer race.
19. The system of claim 12, wherein the bearing housing includes a radially extending damper drain opening formed therein, the damper drain opening in fluid communication with the clearance.
20. The system of claim 19, wherein the bearing housing further includes an axially extending oil scavenge slot in fluid communication with the damper drain opening.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A correction apparatus comprising:
an operating section that performs an operation for forming an image having a predetermined density;
a calculating section that calculates a first correction amount that is a correction amount used when a value of the predetermined density is to be corrected; and
a correction section that corrects the value of the predetermined density in such a manner that the correction is performed on the basis of the first correction amount when first identification information corresponding to an image that has been a target of the operation performed by the operating section before the correction performed by the correction section and second identification information corresponding to an image that is to be a target of the operation performed by the operating section after the correction performed by the correction section do not satisfy a predetermined condition, whereas the correction is performed on the basis of a second correction amount that is smaller than the first correction amount, when the first identification information and the second identification information satisfy the predetermined condition.
2. The correction apparatus according to claim 1,
wherein when the first identification information and the second identification information satisfy the predetermined condition, the correction section performs the correction on the basis of the second correction amount at a first timing, and corrects the value of the predetermined density that has been corrected on the basis of the second correction amount, on the basis of a value that is equal to or less than a difference between the first and second correction amounts at a second timing after the first timing.
3. The correction apparatus according to claim 2,
wherein when third identification information corresponding to an image that has been a target of the operation performed by the operating section before the correction performed at the second timing and fourth identification information corresponding to an image that is to be a target of the operation performed by the operating section after the correction performed at the second timing do not satisfy the predetermined condition, the correction section performs the correction to be performed at the second timing.
4. An image forming apparatus comprising:
a density-changing section that changes a density of an image represented by image data on the basis of a first value;
an image holder;
a charging section that charges a surface of the image holder on the basis of a second value and the image data in which the density has been changed by the density-changing section;
an exposure section that exposes, on the basis of a third value, the surface of the image holder charged by the charging section so as to form an electrostatic latent image;
a developing section that contains a toner and that develops, on the basis of a fourth value, the electrostatic latent image formed by the exposure section by using the toner so as to form a toner image;
a transfer section that transfers, on the basis of a fifth value, the toner image formed by the developing section onto a medium;
a calculating section that calculates a first correction amount that is a correction amount used when at least any one of the first to fifth values is to be corrected; and
a correction section that corrects at least any one of the first to fifth values in such a manner that the correction is performed on the basis of the first correction amount when first identification information corresponding to an image that has been a target of an operation for forming an image, before the correction performed by the correction section and second identification information corresponding to an image that is to be a target of the operation after the correction performed by the correction section do not satisfy a predetermined condition, whereas the correction is performed on the basis of a second correction amount that is smaller than the first correction amount, when the first identification information and the second identification information satisfy the predetermined condition.
5. An image forming system comprising:
the image forming apparatus according to claim 4; and
an image processing apparatus that performs image processing on image data that is to be transmitted to the image forming apparatus,
wherein the image forming apparatus includes a receiving unit that receives the first identification information and the second identification information from the image processing apparatus.
6. A computer readable medium storing a program causing a computer to execute a process comprising:
performing an operation for forming an image having a predetermined density;
calculating a first correction amount that is a correction amount used when a value of the predetermined density is to be corrected; and
correcting the value of the predetermined density in such a manner that the correcting is performed on the basis of the first correction amount when first identification information corresponding to an image that has been a target of the operation performed by the performing before the correcting and second identification information corresponding to an image that is to be a target of the operation performed by the performing after the correcting do not satisfy a predetermined condition, whereas the correcting is performed on the basis of a second correction amount that is smaller than the first correction amount, when the first identification information and the second identification information satisfy the predetermined condition.