Vane pump device for accommodating a working fluid
An embodiment provides a vane pump device. In the vane pump device, vane grooves of a rotor include columnar grooves which accommodate oil, and support the vanes. An inner-plate low pressure side recess portion is provided in an end surface of an inner plate along a rotation direction of the rotor, and supplies oil to the columnar grooves. It includes a low pressure side upstream recess portion, a low pressure side downstream recess portion, and a low pressure side connection recess portion that connects the low pressure side upstream recess portion and the low pressure side downstream recess portion. The width of the low pressure side downstream recess portion is narrower than that of the low pressure side upstream recess portion. The width of the low pressure side connection recess portion is equal to that of the low pressure side downstream recess portion.
1. A vane pump device comprising:
multiple vanes;
a rotor that includes vane grooves which are recessed from an outer circumferential surface of the rotor such that the vanes are supported and configured to move in a radial direction of rotation, and which form 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 the outer circumferential surface of the rotor, and surrounds the rotor; and
a cover member 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 a groove is provided in a cam ring side end surface of the cover member along a rotation direction of the rotor, and supplies the working fluid to the center side spaces,
wherein the groove includes
a first groove portion that accommodates the working fluid,
a second groove portion that is positioned on a downstream side of the first groove portion in the rotation direction, and
a third groove portion that connects the first groove portion and the second groove portion, and that reduces a passage of the working fluid flowing between the first groove portion and the second groove portion,
wherein a width of the second groove portion in the radial direction of rotation is narrower than that of the first groove portion in the radial direction of rotation, and
wherein a width of the third groove portion in the radial direction of rotation is equal to that of the second groove portion in the radial direction of rotation.
2. The vane pump device according to claim 1 ,
wherein a bottom portion of the third groove portion includes a flat surface.
3. The vane pump device according to claim 1 ,
wherein the width of the third groove portion in the radial direction of rotation is wider than a depth of the third groove portion in the direction of the rotation axis.
4. The vane pump device according to claim 1 , further comprising:
another cover member 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 groove and a through-hole are provided in a cam ring side end surface of the other cover member along the rotation direction of the rotor, and supply the working fluid to the center side spaces at a position facing the groove.
5. The vane pump device according to claim 4 ,
wherein the through-hole is provided at a position facing the first groove portion, and a size of the through-hole is equal to the width of the first groove portion in the radial direction of rotation.
6. A vane pump device comprising:
multiple vanes;
a rotor that includes vane grooves which are recessed from an outer circumferential surface of the rotor such that the vanes are supported and configured to move in a radial direction of rotation, and which form 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 the outer circumferential surface of the rotor, and surrounds the rotor; and
a cover member 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 a groove is provided in a cam ring side end surface of the cover member along a rotation direction of the rotor, and supplies the working fluid to the center side spaces,
wherein the groove includes
a first groove portion that accommodates the working fluid,
a second groove portion that is positioned on a downstream side of the first groove portion in the rotation direction, and
a third groove portion that connects the first groove portion and the second groove portion, and that reduces a passage of the working fluid flowing between the first groove portion and the second groove portion, and
wherein a width of the third groove portion in the radial direction of rotation is wider than a depth of the third groove portion in the direction of the rotation axis.
7. The vane pump device according to claim 6 ,
wherein a depth of the first groove portion in the direction of the rotation axis is equal to a depth of the second groove portion in the direction of the rotation axis, and the depth of the third groove portion in the direction of the rotation axis is smaller than the depth of the first groove portion and the depth of the second groove portion in the direction of the rotation axis.
8. A vane pump device comprising:
multiple vanes;
a rotor that includes vane grooves which are recessed from an outer circumferential surface of the rotor such that the vanes are supported and configured to move in a radial direction of rotation, and which form 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 the outer circumferential surface of the rotor, and surrounds the rotor; one cover member 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; and
another cover member 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 a first groove, which supplies the working fluid to the center side spaces at a low pressure, and a second groove and a first through-hole, which supply the working fluid to the center side spaces at a high pressure, are provided in a cam ring side end surface of the one cover member along a rotation direction of the rotor,
wherein a third groove and a second through-hole, which supply the working fluid to the center side spaces at the low pressure at a position facing the first groove, and a fourth groove, which supplies the working fluid to the center side spaces at the high pressure at a position facing the second groove and the first through-hole, are provided in a cam ring side end surface of the other cover member along the rotation direction of the rotor,
wherein the first groove includes
a first groove portion that is positioned to face the second through-hole and accommodates the working fluid at the low pressure,
a second groove portion that is positioned on a downstream side of the first groove portion in the rotation direction and faces the third groove, and
a third groove portion that connects the first groove portion and the second groove portion, and that reduces a passage of the working fluid flowing between the first groove portion and the second groove portion,
wherein a width of the first groove portion and a size of the second through-hole in the radial direction of rotation are the same,
wherein a width of the second groove portion in the radial direction of rotation is narrower than that of the first groove portion in the radial direction of rotation, and
wherein a width of the third groove portion in the radial direction of rotation is equal to that of the second groove portion in the radial direction of rotation.
9. A vane pump device comprising:
multiple vanes;
a rotor that includes vane grooves which are recessed from an outer circumferential surface of the rotor such that the vanes are supported in such a way as to be configured to move in a radial direction of rotation, and which form 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 the outer circumferential surface of the rotor, and surrounds the rotor;
one cover member 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; and
another cover member 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 a first groove, which supplies the working fluid to the center side spaces at a low pressure, and a second groove and a first through-hole, which supply the working fluid to the center side spaces at a high pressure, are provided in a cam ring side end surface of the one cover member along a rotation direction of the rotor,
wherein a third groove and a second through-hole, which supply the working fluid to the center side spaces at the low pressure at a position facing the first groove, and a fourth groove, which supplies the working fluid to the center side spaces at the high pressure at a position facing the second groove and the first through-hole, are provided in a cam ring side end surface of the other cover member along the rotation direction of the rotor,
wherein the first groove includes;
a first groove portion that is positioned to face the second through-hole and accommodates the working fluid at the low pressure,
a second groove portion that is positioned on the downstream side of the first groove portion in the rotation direction and faces the third groove, and
a third groove portion that connects the first groove portion and the second groove portion, and that reduces a passage of the working fluid flowing between the first groove portion and the second groove portion,
wherein a width of the first groove portion in the radial direction of rotation is equal to a width of the second groove portion and the second through-hole in the radial direction of rotation,
wherein a width of the third groove portion in the radial direction of rotation is narrower than the width of the first groove portion in the radial direction of rotation,
wherein the width of the third groove portion is larger than a depth of the third groove portion in the direction of the rotation axis,
wherein the depth of the third groove portion is shallower than a depth of the first groove portion in the direction of the rotation axis, and
wherein the depth of the third groove portion is equal to or smaller than 0.5 times a depth of the second groove portion in the direction of the rotation axis.