Vane pump device for controlling fluid supplied to vane grooves
An embodiment provides a vane pump device includes multiple vanes; a rotor that includes vane grooves which movably support the vanes and which are formed with columnar grooves accommodating oil on rotation center side, and that rotates due to a rotating force received from a rotation shaft; a cam ring that surrounds the rotor; and an inner plate that is disposed on one end portion side of the cam ring in a direction of a rotation axis to cover an opening of the cam ring. The inner plate includes a first portion that is provided to face the grooves, and supplies low pressure oil to the grooves, and a second portion which is provided to face the grooves, supplies high pressure oil to the grooves, and has a width in a radial direction of rotation which is different from that of the first portion in the radial direction of rotation.
1. A vane pump device comprising:
multiple vanes;
a rotor that includes vane grooves which support the vanes that are configured to move in a radial direction of rotation, said vane grooves forming center side spaces accommodating a working fluid on a rotation center side, and that rotates due to a rotating force received from a rotation shaft;
a cam ring that includes an inner circumferential surface facing an outer circumferential surface of the rotor, and surrounds the rotor; and
one cover portion that is disposed on one end portion side of the cam ring in a direction of a rotation axis to cover an opening of the cam ring, wherein
the one cover portion includes;
a first supply portion that is provided to face the center side spaces, and supplies the working fluid to the center side spaces at a first pressure, and
a second supply portion that is provided to face the center side spaces, supplies the working fluid to the center side spaces at a second pressure different from the first pressure, and has a width in the radial direction of rotation which is different from a width of the first supply portion in the radial direction of rotation,
the width of the first supply portion is smaller than a width of each of the center side spaces in the radial direction of rotation,
the width of the second supply portion is equal or larger than the width of each of the center side spaces in the radial direction of rotation,
the first supply portion and the second supply portion are separated from each other in a circumferential direction so as not to communicate with each other, and
the first supply portion does not overlap any of the vanes in the radial direction of rotation.
2. The vane pump device according to claim 1 , wherein the second supply portion supplies the working fluid at the second pressure higher than a pressure of the working fluid supplied by the first supply portion, and has the width wider than the width of the first supply portion.
3. The vane pump device according to claim 1 , further comprising:
another cover portion that is disposed on the other end portion side of the cam ring in the direction of the rotation axis to cover an opening of the cam ring,
wherein the other cover portion includes
a third supply portion that is provided to face the center side spaces, and supplies the working fluid to the center side spaces at the first pressure, and
a fourth supply portion that is provided to face the center side spaces, supplies the working fluid to the center side spaces at the second pressure, and has a width in the radial direction of rotation which is different from a width of the third supply portion in the radial direction of rotation,
wherein the width of the first supply portion corresponds to the width of the third supply portion, and
wherein the width of the second supply portion corresponds to the width of the fourth supply portion.
4. A vane pump device comprising:
multiple vanes;
a rotor that includes vane grooves which support the vanes that are configured to move in a radial direction of rotation, said vane grooves forming center side spaces accommodating a working fluid on a rotation center side, and that rotates due to a rotating force received from a rotation shaft;
a cam ring that includes an inner circumferential surface facing an outer circumferential surface of the rotor, and surrounds the rotor; and
one cover portion that is disposed on one end portion side of the cam ring in a direction of a rotation axis to cover an opening of the cam ring, wherein
the one cover portion includes;
a first supply portion that is provided to face the center side spaces, and supplies the working fluid to the center side spaces at a first pressure, and
a second supply portion that is provided to face the center side spaces, supplies the working fluid to the center side spaces at a second pressure different from the first pressure, and has a width in the radial direction of rotation which is different from a width of the first supply portion in the radial direction of rotation,
the width of the first supply portion is equal or larger than a width of each of the center side spaces in the radial direction of rotation,
the width of the second supply portion is smaller than the width of each of the center side spaces in the radial direction of rotation,
the first supply portion and the second supply portion are separated from each other in a circumferential direction so as not to communicate with each other, and
the second supply portion does not overlap any of the vanes in the radial direction of rotation.
5. The vane pump device according to claim 4 , wherein the first supply portion supplies the working fluid at the first pressure lower than the pressure of the working fluid supplied by the second supply portion, and has the width wider than the width of the second supply portion.
6. The vane pump device according to claim 4 , further comprising:
another cover portion that is disposed on the other end portion side of the cam ring in the direction of the rotation axis to cover an opening of the cam ring,
wherein the other cover portion includes;
a third supply portion that is provided to face the center side spaces, and supplies the working fluid to the center side spaces at the first pressure, and
a fourth supply portion that is provided to face the center side spaces, supplies the working fluid to the center side spaces at the second pressure, and has a width in the radial direction of rotation which is different from a width of the third supply portion in the radial direction of rotation,
wherein the width of the first supply portion corresponds to the width of the third supply portion, and
wherein the width of the second supply portion corresponds to the width of the fourth supply portion.