A fluid tank includes a tank main body that contains a fluid and a bubble removing device that is provided inside the main body and removes bubbles in the fluid. The main body includes a partition and a delivery port through which the fluid is fed to outside. The bubble removing device has an outflow port through which the fluid from which the bubbles have been removed flows to the inside of the main body and a bubble exhaust port through which the bubbles which have been removed are discharged to the inside of the main body. The delivery port is provided adjacent to the outflow port relative to the partition. The partition partitions the inside of the main body into a side in which the outflow port and the delivery port are provided and a side of the bubble exhaust port.
1. A fluid tank that contains a fluid, comprising:
a tank main body that contains the fluid; and
a bubble removing device that is provided to an inside of the tank main body and removes bubbles contained in the fluid,
wherein:
the tank main body comprises a partition that partitions the inside of the tank main body into at least two sides, and a delivery port through which the fluid is fed to an outside,
the bubble removing device comprises an outflow port through which the fluid from which the bubbles have been removed flows to the inside of the tank main body and a bubble exhaust port through which the bubbles that have been removed are discharged to the inside of the tank main body,
at least one subordinate return port, through which fluid not flowing through the bubble removing device returns to the inside of the tank main body, is provided adjacent to the bubble exhaust port relative to the partition,
the delivery port is provided adjacent to the outflow port relative to the partition, and
the partition partitions the inside of the tank main body into a side in which the outflow port and the delivery port are provided and a side in which the bubble exhaust port is provided.
2. The fluid tank according to claim 1 , wherein the partition is fixed to the tank main body.
3. The fluid tank according to claim 1 , wherein the partition partitions the inside of the tank main body into an upper side and a lower side.
4. The fluid tank according to claim 1 , wherein the partition is attached to the tank main body in a manner forming a convex shape that curves upward.
5. The fluid tank according to claim 1 , wherein the bubble exhaust port is provided in the fluid in the inside of the tank main body.
6. The fluid tank according to claim 1 , wherein the partition comprises an opening in which the bubble removing device is inserted, and a gap having a substantially uniform width is circumferentially formed between an inner circumference of the opening and an outer circumference of the bubble removing device inserted in the opening.
7. The fluid tank according to claim 6 , wherein the partition is a guide that covers surroundings of the bubble removing device and the delivery port and guides the fluid from which the bubbles have been removed by the bubble removing device to the delivery port.
8. The fluid tank according to claim 7 , further comprising:
a filter that filters the fluid, wherein the guide is cylindrical, and the filter, the bubble removing device, the guide and the delivery port are substantially linearly disposed.
9. The fluid tank according to claim 8 , further comprising:
a drain port through which an internal hydraulic fluid is drained, wherein the drain port is stretched over an inside and an outside of the guide.
10. The fluid tank according to claim 7 , wherein the guide is shaped in a box having an inclined upper surface, and an air vent hole is provided to an uppermost portion continued from the upper surface.
11. The fluid tank according to claim 10 , wherein the air vent hole of the guide is provided substantially at the center of the tank main body with respect to a horizontal direction.
12. The fluid tank according to claim 11 , further comprising:
a drain port through which an internal hydraulic fluid is drained, wherein the drain port is stretched over an inside and an outside of the guide.
13. The fluid tank according to claim 10 , further comprising:
a drain port through which an internal hydraulic fluid is drained, wherein the drain port is stretched over an inside and an outside of the guide.
14. The fluid tank according to claim 7 , further comprising:
a drain port through which an internal hydraulic fluid is drained, wherein the drain port is stretched over an inside and an outside of the guide.