JP2016065537A - Water pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water pump which is reducible in the size of a pump main body while forming a discharge passage.SOLUTION: A water pump comprises: a pump main body 10 having a rotationally-driven impeller 13 and a vortex chamber 11 for accommodating the impeller 13; a cover case 20 joined to the pump main body 10 while being arranged oppositely to the pump main body; and a gasket part 30 arranged between the pump main body 10 and the cover case 20. A suction flow passage 21 for introducing fluid to the vortex chamber 11, and a discharge flow passage 22 for discharging the fluid from the vortex chamber 11 are formed at the cover case part 20. A suction hole which is opened over the vortex chamber 11 and the suction flow passage 21, and a discharge hole which is opened over the vortex chamber 11 and the discharge flow passage 22 are formed at the gasket part 30. A part of the gasket 30 functions as a lid part for covering at least either of the suction flow passage 21 and the discharge flow passage 22 in a state of being exposed to the pump main body 10 without abutting thereon.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a water pump used in an internal combustion engine such as a vehicle.

  This type of water pump is disclosed in Patent Document 1. In the water pump of Patent Document 1, a plate-like gasket is installed in a form that is sandwiched between a pump body and a fixing member (cylinder block). The gasket is composed of a highly rigid intermediate plate (separator) that separates the space between the pump body and the fixing member into a suction space and a discharge space, and two metal gaskets. The metal gasket is disposed on the front and back surfaces of the intermediate plate in order to prevent water leakage from between the pump body and the fixing member and the intermediate plate.

  The intermediate plate is formed with a suction opening for guiding water supplied from a radiator of the internal combustion engine to the suction flow path of the fixed member, and a supply opening for guiding water in the suction flow path to the discharge space. The outer edge portion is clamped and fixed between the pump body and the cover case portion.

JP 2003-269165 A

  When the water pump of Patent Document 1 is used for, for example, a V-type engine, cooling water may be supplied to two spaced apart positions. In that case, the discharge flow path is extended outward from one end and the other end of the pump body, respectively. Since this discharge flow path is formed so as to be covered with the pump body, the area occupied by the pump body increases, and the water pump tends to be enlarged. If it becomes so, the weight of a water pump will increase, and the fall of a fuel consumption and the cost increase of a water pump will be caused.

  In view of the above problems, an object of the present invention is to provide a water pump capable of reducing the size of a pump body while forming a discharge channel.

The characteristic configuration of the water pump according to the present invention includes an impeller that is rotationally driven and a pump body that includes a vortex chamber that houses the impeller,
A cover case part joined in a state of being opposed to the pump body;
A gasket portion disposed between the pump body and the cover case portion,
The cover case part is formed with a suction channel for guiding fluid to the vortex chamber and a discharge channel for discharging the fluid from the vortex chamber,
The gasket portion is formed with a suction hole that opens across the vortex chamber and the suction flow path, and a discharge hole that opens across the vortex chamber and the discharge flow path,
A part of the gasket portion is a lid portion that covers at least one of the suction flow channel and the discharge flow channel in a state where the gasket portion is exposed without being in contact with the pump body.

  According to this configuration, the gasket part is formed with a suction hole that opens across the vortex chamber and the suction flow path, and a discharge hole that opens across the vortex chamber and the discharge flow path. Since the lid portion covers at least one of the suction flow channel and the discharge flow channel in a state of being exposed without contacting the pump main body, a portion covering at least one of the suction flow channel and the discharge flow channel in the pump main body ( Pump cover) is not required. Thereby, a pump main body can be made compact and a water pump can be reduced in size. As a result, since the weight of the water pump is reduced, it is possible to improve fuel consumption and reduce the manufacturing cost of the water pump. In addition, when the pump body is compact, the water pump can be easily assembled and removed, and the maintainability is improved.

  Another characteristic configuration of the present invention is that an inclined portion for guiding fluid to the discharge passage is formed at an edge portion of the discharge hole in the gasket portion.

  As in this configuration, when an inclined portion that guides the fluid to the discharge flow path is formed at the edge of the discharge hole in the gasket portion, the fluid is easily discharged from the vortex chamber toward the discharge flow path. The discharge performance of the water pump is improved.

  Another characteristic configuration of the present invention is that a bent portion facing the cover case portion is formed on at least a part of the edge portion of the discharge hole.

  In the water pump according to the present invention, when the gasket part is a cover part that covers the discharge flow path in a state where the gasket part is exposed without being in contact with the pump body, the gasket part covers the discharge flow path near the discharge hole. The pump body is fixed to the site. In this case, the gasket portion at the portion covering the discharge flow path is easily bent because there is no support, and the sealing performance by the gasket portion may be deteriorated. However, if the bent part is formed at the edge of the discharge hole at the edge of the discharge hole as in this configuration, the bent part improves the rigidity of the gasket part. Thereby, since the bending of the gasket part at the time of fixing a pump main body is suppressed, sufficient sealing performance can be ensured.

  Another feature of the present invention is that the edge of the discharge hole in the gasket portion is formed at a position that does not protrude from the inner surface of the pump body.

In the gasket portion, when the edge portion of the discharge hole protrudes from the inner surface of the pump body, a part of the fluid is blocked by the protruding edge portion, the water pressure in the flow path increases, and the load of the water pump increases. Therefore, in this configuration, the edge of the discharge hole in the gasket portion is provided at a position that does not protrude from the inner surface of the pump body. As a result, the edge of the discharge hole retracted from the discharge flow path does not affect the fluid flow. As a result, the water pump can be operated efficiently. Further, the edge of the discharge hole is pushed by the fluid, and a gap is not generated between the pump body and the fluid, and the fluid does not leak.
Since the edge of the discharge hole does not protrude from the inner surface of the pump body, it is not possible to form a bent part at the edge of the discharge hole in order to ensure the rigidity of the gasket, but ensuring rigidity by adjusting the material and thickness Is possible.

Another characteristic configuration of the present invention includes a pump body including a rotationally driven impeller and a vortex chamber that houses the impeller,
A chain cover for a vehicle joined in a state of being opposed to the pump body;
A gasket portion disposed between the pump body and the chain cover,
The chain cover is formed with a suction groove that guides fluid to the vortex chamber and a discharge groove that discharges the fluid from the vortex chamber,
The gasket portion is formed with a suction hole that opens across the vortex chamber and the suction groove portion, and a discharge hole that opens across the vortex chamber and the discharge groove portion,
A part of the gasket portion is a lid portion that covers at least one of the suction groove portion and the discharge groove portion in a state where the gasket portion is exposed without contacting the pump main body.

  According to this configuration, the gasket portion is formed with the suction hole that opens across the vortex chamber and the suction groove portion, and the discharge hole that opens across the vortex chamber and the discharge groove portion, and a part of the gasket portion is formed by the pump. Since it is a cover part that covers at least one of the suction groove part and the discharge groove part in an exposed state without contacting the main body, a part (pump cover) that covers at least one of the suction groove part and the discharge groove part in the pump main body is unnecessary. Become. Thereby, a pump main body can be made compact and a water pump can be reduced in size. As a result, since the weight of the water pump is reduced, it is possible to improve fuel consumption and reduce the manufacturing cost of the water pump. In addition, when the pump body is compact, the water pump can be easily assembled and removed, and the maintainability is improved.

  Further, in the water pump, a suction groove and a discharge groove are formed in the chain cover. For this reason, the space which a chain cover has can be utilized effectively by forming a suction groove part and a discharge groove part in a chain cover, avoiding the position of the chain stored in a chain cover.

It is a front view of the water pump which concerns on this invention. It is II-II arrow sectional drawing of FIG. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 1. It is a front view of a gasket part. It is a disassembled front view of the water pump which concerns on this invention. It is principal part sectional drawing near the opening part for discharge. It is principal part sectional drawing (bead part) of a gasket. It is a front view of the water pump of other embodiments. It is principal part sectional drawing near the opening part for discharge of other embodiment. It is a top view of the gasket part near the opening part for discharge of other embodiment. It is a front view of the water pump of other embodiments.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

[First Embodiment]
The water pump 1 of FIGS. 1-7 shows the example which applied the water pump which concerns on this invention for V type engines.
As shown in FIGS. 1 to 3, the water pump 1 includes a pump main body 10, a cover case portion 20 disposed opposite to the pump main body 10, and a gasket disposed between the pump main body 10 and the cover case portion 20. Part 30. The pump body 10 includes a vortex chamber 11 that opens to the cover case portion 20 side, and an impeller 13 that is attached to one end of the drive shaft 12 and is accommodated in the vortex chamber 11. The cover case part 20 is constituted by a part of the chain cover 40 of the engine.

  The drive shaft 12 of the pump body 10 is rotatably supported by a ball bearing 14 or the like, and is rotationally driven by power such as an engine crankshaft (not shown). A mechanical seal 15 that seals the vortex chamber 11 in a liquid-tight manner is disposed between the ball bearing 14 and the impeller 13.

  The cover case part 20 is formed with a suction flow path (suction groove part) 21 and a discharge flow path (discharge groove part) 22. The pump body 10 is disposed to face the suction flow path 21. The pump body 10 is placed on a part of the flat portion 23 and the bolt mounting portion 24 around the suction flow path 21. The discharge flow path 22 is covered with the gasket part 30. As shown in FIG. 1, the gasket portion 30 has a shape that extends in the direction along the discharge flow path 22 with respect to the pump body 10, and serves as a lid portion that covers the discharge flow path 22.

A cylindrical portion 16 is integrally formed in the pump body 10, and water sent from a radiator or the like is guided to the suction flow path 21 by the cylindrical portion 16. The water supplied from the cylindrical portion 16 flows through the suction passage 21 and is guided to the suction side of the impeller 13. The pump body 10 is provided with a cylindrical extension 17 that surrounds the impeller 13 from the outer circumferential direction, and the vortex chamber 11 is constituted by the internal space of the extension 17. The impeller 13 includes a disc 18 fixed to the drive shaft 12 and a plurality of blades 19 erected from the disc 18 toward the cover case portion 20.
By rotating the impeller 13 by the drive shaft 12, the water in the vortex chamber 11 is pumped toward the outer periphery of the impeller 13.

  The gasket portion 30 includes an intermediate plate 31, a first gasket 32 disposed on one surface of the intermediate plate 31 (surface on the pump body 10 side), and the other surface of the intermediate plate 31 (surface on the cover case portion 20 side). And the second gasket 33 arranged in the above. The intermediate plate 31 is made of a highly rigid material such as various metals. The gaskets 32 and 33 are made of a material having a slight elasticity such as a synthetic resin or relatively hard rubber, or a metal gasket in which a non-metallic member such as rubber or synthetic resin is coated on both surfaces of a plate-like metal member. Has been.

  The intermediate plate 31 has an entry hole 34 for the fluid supplied through the cylindrical portion 16 to enter the suction passage 21, and a suction hole 35 that opens across the vortex chamber 11 and the suction passage 21. It is formed through. In addition, a discharge hole 36 that opens across the vortex chamber 11 and the discharge flow path 22 is formed through the intermediate plate 31. At the edge of the discharge hole 36, a folded piece 37 is formed that is folded toward the cover case 20 side.

  The water in the vortex chamber 11 flows into the discharge flow path 22 through the discharge hole 36 and is sent to the engine water jacket or the like from the discharge port 25 formed through the discharge flow path 22. As shown in FIG. 6, the folding piece 37 of the intermediate plate 31 forms an inclined portion that is folded in a posture inclined toward the end 37 a in the flow direction of the discharge flow path 22. When the inclined portion (folded piece) 37 is formed, the fluid is easily discharged from the vortex chamber 11 toward the discharge flow path 22, so that the discharge performance of the water pump 1 is improved, for example, the flow resistance is reduced.

  The first gasket 32 is disposed at the periphery of the intermediate plate 31 and the peripheral portions of the entry hole 34 and the suction hole 35. The second gasket 33 is also disposed at a portion facing the discharge flow path 22. Thereby, the gasket part 30 partitions the suction flow path 21 and the vortex chamber 11, and a part of the gasket part 30 becomes a cover part that covers the discharge flow path 22 in an exposed state without contacting the pump body 10. .

  The pump body 10 and the cover case portion 20 are joined together by bolts 50 and the like with the gasket portion 30 interposed. A part of the gasket part 30 is joined to the cover case part 20 with a bolt 50 or the like while covering the discharge flow path 22.

  The gasket part 30 separates the space between the pump body 10 and the cover case part 20 into the suction flow path 21 and the vortex chamber 11. Accordingly, the water in the vortex chamber 11 sent out by the impeller 13 is configured not to return to the suction flow path 21.

  The water pump 1 is configured such that the discharge hole 36 is formed in the gasket portion 30 and a part of the gasket portion 30 serves as a lid portion that covers the discharge flow path 22. The cover 10 is not necessary. Thereby, the pump main body 10 can be made small and the water pump 1 can be miniaturized. As a result, since the weight of the water pump 1 is reduced, the fuel consumption can be improved and the manufacturing cost of the water pump 1 can be reduced. In addition, since the pump main body 10 is small, the water pump 1 can be easily assembled and removed, and the maintainability is improved.

  As shown in FIG. 6, at least a part of the edge portion of the discharge hole 36 in the gasket portion 30 has a bent portion 38 facing the cover case portion 20. If the cover part covers the discharge flow path 22 in a state where a part of the gasket part 30 is exposed without contacting the pump body 10, the gasket part 30 covers the discharge flow path 22 near the discharge hole 36. The pump body 10 is fixed. In this case, the gasket portion 30 at the portion covering the discharge flow path 22 is not easily supported because there is no support, and the sealing performance by the gasket portion 30 may be reduced. However, as described above, if the bent portion 38 facing the cover case portion 20 is formed at the edge of the discharge hole 36 in the gasket portion 30, the bent portion 38 improves the rigidity of the gasket portion 30. Thereby, since the bending of the gasket part 30 at the time of fixing the pump main body 10 is suppressed, sufficient sealing performance can be ensured.

  As shown in FIG. 7, a bead 39 is provided on the second gasket 33 at the periphery of the gasket portion 30. This bead 39 is for improving the adhesiveness between the second gasket 33 and the intermediate plate 31 in contact therewith. However, in the present embodiment, a portion where the intermediate plate 31 is sandwiched between the first gasket 32 and the second gasket 33 and a portion where the intermediate plate 31 contacts only the second gasket 33 are mixed. In particular, at the portion where the intermediate plate 31 is in contact with only the second gasket 33, the intermediate plate 31 serves as the lid portion of the discharge flow path 22, and between the portions fastened by the bolts 50, the intermediate plate 31 and the second gasket 33 Are easily separated. Therefore, the height of the bead 39 in the portion of the second gasket 33 that serves as a lid that covers the discharge flow path 22 and the height of the bead 39 in the portion where the gasket portion 30 is sandwiched between the pump body 10 and the cover case portion 20. Is preferably optimized. As a result, the adhesion between the intermediate plate 31 and the second gasket 33 is ensured, and the sealing performance of the gasket portion 30 with respect to the discharge flow path 22 is improved.

[Second Embodiment]
As shown in FIG. 8, the pump body 10 may have a configuration that does not have a cylindrical portion that guides fluid from the outside to the suction flow path 21. In this case, when the first gasket 32 is exposed from the pump body 10, it is not disposed in a portion covering the suction flow path 21, and a part of the gasket portion 30 covers the suction flow path 21 and the discharge flow path 22. It becomes.

  Thereby, the gasket part 30 can be efficiently utilized as a cover part of the water pump 1. The pump main body (pump cover) 10 does not need a portion covering the suction flow path 21 and the discharge flow path 22, and the pump main body 10 can be further downsized. As a result, the die casting machine for molding the pump body 10 can also be reduced in size.

[Third Embodiment]
In the present embodiment, as shown in FIG. 9, the edge portion 36 a of the discharge hole 36 in the gasket portion 30 is formed at a position that does not protrude from the inner surface 10 a of the pump body 10. The discharge hole 36 is formed by cutting away the folded piece 37 and the bent portion 38. In FIG. 9, the edge 36 a of the discharge hole 36 is formed at a position along the inner surface 10 a of the pump body 10. The edge 36 a of the discharge hole 36 may be formed at a position that is retracted from the inner surface 10 a of the pump body 10.

  When the edge 36a of the discharge hole 36 is formed at a position that does not protrude from the inner surface 10a of the pump body 10, the edge 36a of the discharge hole 36 that is retreated from the discharge flow path 22 does not affect the flow of fluid. . As a result, the water pump 1 can be operated efficiently. Further, the edge 36a of the discharge hole 36 is pushed by the fluid, and a gap is not generated between the pump body 10 and the fluid leaking.

  In the present embodiment, since the bent portion is not formed on the edge portion 36 a of the gasket portion 30, the thickness is increased by increasing the thickness of the intermediate plate 31. The gaskets 32 and 33 are constituted by metal gaskets. When the thickness of the intermediate plate 31 is increased, the gaskets 32 and 33 may be made of a rubber material, and the gaskets 32 and 33 may be bonded to the intermediate plate 31. In that case, although the number of bolts 50 to which the gasket portion 30 is fixed can be reduced, an adhesion process for the gaskets 32 and 33 is required separately.

  As shown in FIG. 10, a bead 39 is provided on the edge 36 a of the discharge hole 36 above the first gasket 32. The bead 39 is crushed when the pump body 10 is placed on the gasket portion 30 to improve the sealing performance. The gasket portion 30 is provided with bolt holes 51 on both ends of the bead 39 in the width direction, and the bead 39 is positioned on a line connecting the two bolt holes 51. Thereby, since the edge part 36a of the gasket part 30 becomes easy to receive the fixing force by the volt | bolt 50, a sealing performance improves more. If the sealing performance is enhanced, the width of the discharge hole 36 sandwiched between the bolt holes 51 in the gasket portion 30 can be set wide to increase the discharge amount.

[Another embodiment]
(1) In the above embodiment, an example in which a part of the gasket part 30 is a cover part that covers the discharge flow path 22 in an exposed state without contacting the pump body 10, the suction flow path 21, and the discharge flow Although the example which becomes a cover part which covers the path | route 22 was shown, the structure which becomes a cover part which covers the suction flow path 21 may be sufficient as a part of gasket part 30. FIG.

(2) In the first embodiment, an example in which the discharge hole 36 is formed by the folding piece 37 of the intermediate plate 31 is shown. However, as in the second embodiment, the folding hole 37 is cut off from the folding piece 37 or the bent portion 38. It may be a through hole formed. Further, the discharge hole 36 may be formed by cutting one of the folding piece 37 and the bent portion 38.

(3) As shown in FIG. 11, the water pump 1 may form one groove portion 26 as a discharge channel in a part of the chain cover 40. In that case, a part of the gasket part 30 extended from one side of the pump main body 10 to this groove part 26 becomes a cover part.

(4) The lid portion covering the discharge flow path 22 which is a part of the gasket portion 30 makes the interval between the bolts 50 fixed to the cover case portion 20 narrower than other portions (portions covered by the pump body 10). May be. When the interval between the bolts 50 is narrowed, the sealing performance of the gasket portion 30 with respect to the discharge flow path 22 is improved.

(5) The gasket portion 30 may be formed by thickening the intermediate plate 31. By increasing the thickness of the intermediate plate 31 and optimizing the thickness, the rigidity of the intermediate plate 31 (gasket portion 30) is improved. Thereby, the sealing performance of the gasket part 30 can be improved.

(6) In the above embodiment, an example in which the cover case portion 20 is configured by a part of the chain cover 40 has been shown, but the cover case portion 20 may be a part of a cylinder block, for example.

  The present invention includes a pump main body provided with an impeller, a counterpart member such as a cover case portion that forms a suction flow channel facing the pump main body, and a gasket portion disposed between the pump main body and the counterpart member. It can be used for various water pumps equipped.

DESCRIPTION OF SYMBOLS 1 Water pump 10 Pump main body 10a Inner surface 11 Vortex chamber 13 Impeller 20 Cover case part 21 Suction flow path 22 Discharge flow path 30 Gasket part 31 Middle plate 32 1st gasket 33 2nd gasket 35 Suction hole 36 Discharge hole 37 Folding piece (inclination) Part)
38 Bending parts

Claims (5)

A pump body provided with a rotatingly driven impeller and a vortex chamber containing the impeller;
A cover case part joined in a state of being opposed to the pump body;
A gasket portion disposed between the pump body and the cover case portion,
The cover case part is formed with a suction channel for guiding fluid to the vortex chamber and a discharge channel for discharging the fluid from the vortex chamber,
The gasket portion is formed with a suction hole that opens across the vortex chamber and the suction flow path, and a discharge hole that opens across the vortex chamber and the discharge flow path,
The water pump which becomes a cover part which covers at least any one of the said suction flow path and the said discharge flow path in the state which a part of said gasket part exposed without contacting the said pump main body.   The water pump according to claim 1, wherein an inclined portion for guiding fluid to the discharge flow path is formed at an edge portion of the discharge hole in the gasket portion.   The water pump according to claim 1 or 2, wherein a bent portion facing toward the cover case portion is formed on at least a part of an edge portion of the discharge hole.   The water pump according to claim 1 or 2, wherein an edge portion of the discharge hole in the gasket portion is formed at a position not protruding from an inner surface of the pump body. A pump body provided with a rotatingly driven impeller and a vortex chamber containing the impeller;
A chain cover for a vehicle joined in a state of being opposed to the pump body;
A gasket portion disposed between the pump body and the chain cover,
The chain cover is formed with a suction groove that guides fluid to the vortex chamber and a discharge groove that discharges the fluid from the vortex chamber,
The gasket portion is formed with a suction hole that opens across the vortex chamber and the suction groove portion, and a discharge hole that opens across the vortex chamber and the discharge groove portion,
The water pump which becomes a cover part which covers at least any one of the said suction groove part and the said discharge groove part in the state which a part of said gasket part exposed without contacting the said pump main body.

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