All The Claims

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.

1. A tree tensile load indicating belt device, having
a belt (10) with a loop at each end (12, 12\u2032) which loop is formed by turning over the end parts of the belt (10) and fastening the ends to the belt via fastenings (14, 14\u2032), wherein the fastenings (14, 14\u2032) and the belt (10) are adapted to withstand a predetermined minimum tensile force, said belt being a first color, and
an indicating element (16) having a signalling colour different from said first color in the vicinity of at least one of the loops (12), which indicating element is fastened with fastenings (18, 18\u2032) at first and second end portions of the signalling element onto the belt (10) such that said indicating element (16) shortens the belt (10), wherein the load carrying capacity of the fastenings (18, 18\u2032) is different, wherein the first indicating element end fastening (18) is a rated breaking point which yields to a pre-determined load, while the second indicating element end fastening (18\u2032) withstands higher loads such that the first indicating element end fastening (18) gives way when a pre-determined tensile force acts on the belt (10), the tensile force being smaller than said minimum tensile force which the loop fastenings (14, 14\u2032) and the belt are adapted to withstand, whereby the indicating element (16), released at one end and attached at the other end, forms a signal pendant different in color from said first color, wherein one end of said belt device is secured to a tree part to be monitored, and the other end of said belt device is secured to a tree part stronger than the tree part to be monitored.
2. The belt device according to claim 1, wherein the belt (10) is enclosed loosely between the 1oops (12, 12\u2032) by an opaque protective tube (17), which also covers the indicating element (16) in the state in which both its ends are fastened.
3. The belt device according to claim 2, wherein the indicating element (16) projects beyond the opaque protective tube (17) at least partially after its fastening (18) has given way when the tensile force has exceeded the limit.
4. The belt device according to claim 1, wherein the fastening (18) which is distant to the loop gives way when the pre-determined tensile force is exceeded.
5. The belt device according to claim 1, wherein a region (20) of the belt (10) which is overlapped by the indicating element (16) is folded in a Z-shaped manner.
6. The belt device according to claim 1, wherein the belt (10) is made of a plastic material.
7. The belt device according to claim 6, wherein the plastic material is a polyester-, polyamide- or polyethylene fabric.
8. The belt device according to claim 1, wherein the indicating element (16) is made of a plastic material.
9. The belt device according to claim 8, wherein the plastic material is a polyester-, polyamide- or polyethylene fabric.
10. The belt device according to claim 1, wherein the indicating element (16) is yellow, orange or red.
11. The belt device according to claim 1, wherein the fastening (14, 14\u2032) of the end portions of the belt (10) which forms the loop (12, 12\u2032) is a seam.
12. The belt device according to claim 1, wherein the fastening of the end portions of the belt (10) which forms the loop (12, 12\u2032) is by plastic welding, by means of an adhesive or by riveting.
13. The belt device according to claim 1, wherein the fastening (18, 18\u2032) of the end portions of the indicating element (16) on the belt (10) is by a seam.
14. The belt device according to claim 1, wherein the fastening of the end portions of the indicating element (16) on the belt (10) is by plastic welding, by means of an adhesive or by riveting.
15. The belt device according to claim 1, wherein the tensile force leading to giving way of the fastening (18) of the end portion of the indicating element (16) on the belt (10) is in the range of 5 kN to 100 kN.
16. A tree tension device with overload indication, including
a chain, rope or belt tension organ (10), at the ends of which a tensile force acts, and
at least one indicating element (16) having a signalling colour different from the tension organ (10) color which indicating element (16) when released visually signals a tensile force which exceeds a pre-determined tensile force,
wherein the tension organ (10) is enclosed by an opaque protective tube (17) which covers at least the indicating element (16), and
wherein the indicating element (16) is fastened with two end portions on the tension organ (10) and overlaps the tension organ in the length direction, forming a loop part (20) which shortens the tension organ, the indicating element (16) having a signalling colour, which indicating element is fastened with fastenings (18, 18\u2032) at first and second end portions of the signalling element onto the tension organ (10) such that said indicating element (16) shortens the tension organ (10), wherein the load carrying capacity of the fastenings (18, 18\u2032) is different, wherein the first indicating element end fastening (18) is a rated breaking point which yields to a pre-determined load, while the second indicating element end fastening (18\u2032) withstands higher loads such that the first indicating element end fastening (18) gives way when a pre-determined tensile force acts on the tension organ (10), the tensile force being smaller than said minimum tensile force which the loop fastenings (14, 14\u2032) and the belt are adapted to withstand, whereby the indicating element (16), released at one end and attached at the other end, forms a signal pendant wherein one end of said tension device is secured to a tree part to be monitored, and the other end of said tension device is secured to a tree part stronger than the tree part to be monitored.
17. The tension device according to claim 16, wherein the first fastening (18) of the indicating element (16) on the tension organ (10) gives way when a predetermined tensile force is exceeded and at least a portion of the indicating element (16) is pulled out from the opaque protective tube (17) by the straightening of the loop part (20) of the tension organ (10).
18. A tree tensile load indicating method for quickly and reliably determining from a distance whether an overload has occurred on a belt device, the method comprising:
forming a belt (10) with a loop at each end (12, 12\u2032) which loop is formed by turning over the end parts of the belt (10) and fastening the ends to the belt via fastenings (14, 14\u2032), wherein the fastenings (14, 14\u2032) and the belt (10) are adapted to withstand a predetermined minimum tensile force, said belt being a first color,
providing said belt with an indicating element (16) having a signalling colour different from said first color in the vicinity of at least one of the loops (12), which indicating element is fastened with fastenings (18, 18\u2032) at first and second end portions of the signalling element onto the belt (10) such that said indicating element (16) shortens the belt (10), wherein the load carrying capacity of the fastenings (18, 18\u2032) is different, wherein the first indicating element end fastening (18) is a rated breaking point which yields to a pre-determined load, while the second indicating element end fastening (18\u2032) withstands higher loads such that the first indicating element end fastening (18) gives way when a pre-determined tensile force acts on the belt (10), the tensile force being smaller than said minimum tensile force which the 1oop fastenings (14, 14\u2032) and the belt are adapted to withstand,
attaching said first loop to a tree part to be monitored, attaching said second loop to a tree part stronger than the tree part to be monitored,
observing whether a signal pendant different in color from said first color has been released by the indicating element (16) becoming released at one end while remaining attached at the other end, the signal pendant indicating that overload has occurred on a belt device.
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 method for use in correcting a signal from a tachometer coupled to a rotating shaft in a wind turbine, said method comprising:
receiving a raw tachometer signal from the tachometer, the signal indicating the speed andor angular position of the shaft, wherein the tachometer is configured to transmit at least 1000 pulses in each revolution of the shaft;
dividing each revolution of the received raw signal into a predetermined number of segments, wherein each segment is associated with an angular portion of the shaft;
determining a speed profile by tracking the received raw signal, the speed profile including a speed of each segment for each revolution;
determining a cyclic error exists in the raw tachometer signal; and
providing a corrective signal to adjust a torque within the wind turbine based at least in part on the determined cyclic error.
2. A method in accordance with claim 1, wherein determining a speed profile further comprises tracking the received raw signal for at least one of a predetermined period of time and a predetermined number of revolutions.
3. A method in accordance with claim 1, further comprising determining an average segment speed for each revolution.
4. A method in accordance with claim 3, further comprising determining a segment error by comparing a speed of a segment of a revolution to the average segment speed of the revolution.
5. A method in accordance with claim 4, further comprising determining an average segment error for each segment by averaging the segment errors of the segment for at least one of a predetermined period of time and a predetermined number of revolutions.
6. A method in accordance with claim 5, wherein determining a cyclic error exists comprises comparing the average segment error to a predetermined threshold.
7. A method in accordance with claim 5, wherein providing a corrective signal comprises subtracting the average segment error from the received raw signal.
8. A method in accordance with claim 1, further comprising determining an angular position profile by tracking the received raw signal, the angular position profile including an angular position of each segment for each revolution.
9. A method in accordance with claim 8, wherein determining a cyclic error exists comprises comparing an angular position of a segment of a first revolution to an angular position of the segment of a second revolution.
10. A wind turbine system comprising:
a tachometer configured to provide a raw tachometer signal, the signal indicating a number of revolutions of a shaft of the wind turbine, wherein the tachometer is further configured to transmit at least 1000 pulses in each revolution of the shaft; and
a power converter configured to:
divide each revolution of the received raw signal into a predetermined number of segments, wherein each segment is associated with an angular portion of the shaft;
determine a speed profile by tracking the received raw signal, the speed profile including a speed of each segment for each revolution for at least one of a predetermined period of time and a predetermined number of revolutions;
determine a cyclic error exists in the raw tachometer signal; and
provide a corrective signal to adjust a torque within the wind turbine using the determined cyclic error.
11. A wind turbine system in accordance with claim 10, wherein the power converter is further configured to
determine an average segment speed for each revolution for at least one of a predetermined period of time and a predetermined number of revolutions.
12. A wind turbine system in accordance with claim 11, wherein the power converter is further configured to:
determine a segment error by comparing a speed of a segment of a revolution to an average segment speed of the revolution;
determine an average segment error by averaging the segment errors of a segment for at least one of a predetermined period of time and a predetermined number of revolutions; and
compare the average segment error to a predetermined threshold.
13. A wind turbine system in accordance with claim 12, wherein the power converter is further configured to provide a corrective signal by subtracting the average segment error from the received raw signal.