KR101803273B1 - Lubrication Structure For Oil Pump - Google Patents

Lubrication Structure For Oil Pump Download PDF

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Publication number
KR101803273B1
KR101803273B1 KR1020160019858A KR20160019858A KR101803273B1 KR 101803273 B1 KR101803273 B1 KR 101803273B1 KR 1020160019858 A KR1020160019858 A KR 1020160019858A KR 20160019858 A KR20160019858 A KR 20160019858A KR 101803273 B1 KR101803273 B1 KR 101803273B1
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KR
South Korea
Prior art keywords
shaft
passage
rotor
rotor chamber
hole
Prior art date
Application number
KR1020160019858A
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Korean (ko)
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KR20170098013A (en
Inventor
신오상
이종수
진주석
김인식
Original Assignee
마그나파워트레인코리아 주식회사
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Priority to KR1020160019858A priority Critical patent/KR101803273B1/en
Publication of KR20170098013A publication Critical patent/KR20170098013A/en
Application granted granted Critical
Publication of KR101803273B1 publication Critical patent/KR101803273B1/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/0467Elements of gearings to be lubricated, cooled or heated
    • F16H57/0475Engine and gearing, i.e. joint lubrication or cooling or heating thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00Pressure lubrication
    • F01M1/02Pressure lubrication using lubricating pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/0006Vibration-damping or noise reducing means specially adapted for gearings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/02Gearboxes; Mounting gearing therein
    • F16H57/028Gearboxes; Mounting gearing therein characterised by means for reducing vibration or noise
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/02Gearboxes; Mounting gearing therein
    • F16H57/029Gearboxes; Mounting gearing therein characterised by means for sealing the gearbox casing, e.g. to improve airtightness
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/0434Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
    • F16H57/0436Pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/0434Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
    • F16H57/0436Pumps
    • F16H57/0439Pumps using multiple pumps with different power sources or a single pump with different power sources, e.g. one and the same pump may selectively be driven by either the engine or an electric motor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/0467Elements of gearings to be lubricated, cooled or heated
    • F16H57/0469Bearings or seals
    • F16H57/0472Seals

Abstract

A lubricating structure of an oil pump according to the present invention comprises a suction passage for supplying oil from the outside, a discharge passage for discharging oil to the outside, a suction port communicating with the suction passage and formed on the bottom surface of the rotor chamber, A discharge port formed on a bottom surface of the rotor chamber, and a pump housing having an axis insertion hole; A rotor inserted into the rotor chamber; A cover coupled to the pump housing to close the rotor chamber; A seal member installed between the shaft insertion hole of the pump housing and the shaft so that the oil in the rotor chamber does not leak along the shaft; A branch passage branched from the suction passage and communicating with a filling space formed by the inner rotor, the seal member, the shaft insertion hole and the shaft; A lubricant surface passage formed toward the rotor chamber along an axial insertion hole portion making contact with the journal portion of the inner rotor, the lubricant surface passage being communicated with the filling space; A rim passage communicating with the lubrication surface passage and formed cooperatively with the inner rotor and the rotor chamber bottom side shaft insertion hole inlet; A bottom surface passage formed along the bottom surface of the rotor chamber and communicating with the rim passage and the suction port; .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an oil pump,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubrication structure of an oil pump, and more particularly, to an oil pump for use in an engine or a transmission of an automobile, an oil pump for appropriately lubrication of a shaft of a drive source, Lubricating structure.

1, a rotor chamber is formed in the pump housing 10, and an inner rotor 41 and an out rotor 42, or vanes (not shown) are provided in the rotor chamber, It is mainly used with an installed inner rotor and cam ring. The inner rotor rotates in connection with the shaft 100 of a drive source such as a motor and the suction port 80 and the discharge port 90 formed in the rotor chamber are connected to the suction passage 12 and the discharge passage 13, respectively. In the following description, both the inner rotor and the outer rotor, or the inner rotor and the cam ring equipped with the vane are collectively referred to as the rotor 40.

The rotor chamber of the pump housing 10 is closed by the cover 70 and the side plate 30 is installed between the rotor 40 and the cover 70. [ If necessary, a base plate may be provided between the rotor 40 and the bottom surface of the rotor chamber.

The base plate and the side plate 30 are provided to prevent the pump housing 10 and the cover 70 from being worn by the rotor 40. It is also possible that the base plate and the side plate 30 do not have both of them.

In this type of oil pump, as the rotor 40 rotates, the volume of the pressure chamber 43 formed between the two rotors is expanded / contracted and pumped.

The shaft 100 inserted through the shaft insertion hole 14 of the pump housing 10 is supported by the bearing 120 and prevents the oil from leaking to the outside along the shaft 100 by the sealing member 110 .

The oil is supplied by the branch passage 15 communicating with the discharge port 90 for lubrication of the shaft insertion hole 14 of the pump housing 10 and the journal portion of the inner rotor 41 inserted therein. The supplied oil is filled in the space formed by the sealing member 110, the shaft insertion hole 14 of the pump housing 10, and the journal portion of the shaft 100 and the inner rotor 41, So that it is permeable between the shaft insertion hole 14 and the journal portion of the inner rotor 41 and lubricated.

Such a conventional technique has been applied to almost all oil pumps as disclosed in Korean Patent No. 10-1136384.

In order to prevent the oil supplied from the discharge port 90 from being leaked to the outside through the bearing 120 along the shaft 100 due to the high pressure of the oil, the sealing member 110, which can withstand high pressure, 100 and the shaft inserting hole 14, it is necessary to pay attention to the fixing of the sealing member 110. [ Further, since the gap between the shaft insertion hole 14 of the pump housing 10 and the journal portion of the inner rotor 41 is very narrow, the oil is difficult to permeate, thereby causing a trouble such as generating noise and abrasion.

KR 10-1136384 B, April 18, 2012, drawing 2, drawing 4

SUMMARY OF THE INVENTION The present invention has been made to overcome the problems of the prior art as described above, and it is an object of the present invention to provide a pump for a motor, which does not require a high-performance sealing material capable of withstanding the high pressure of the discharge port, And it is an object of the present invention to provide a lubricating structure of an oil pump which can smoothly supply oil along the shaft inserting hole to achieve sufficient lubrication to prevent noise and wear and enhance durability even when the gap between the inserting hole and the inserting hole is narrow.

In the first form of the lubricating structure of the oil pump of the present invention,
A suction passage formed in the bottom surface of the rotor chamber and communicating with the suction passage, and a suction port formed in the bottom surface of the rotor chamber, the suction port being in communication with the discharge passage, A pump housing having an exhaust port and an axial insertion hole; A rotor inserted into the rotor chamber; A cover coupled to the pump housing to close the rotor chamber; And a shaft of a drive source inserted into the shaft insertion hole,

A sealing member installed between the shaft insertion hole of the pump housing and the shaft so that the oil in the rotor chamber does not leak along the shaft;
A branch passage branched from the suction passage and communicating with a filling space formed by the inner rotor, the seal member, the shaft insertion hole and the shaft;

A lubricant surface passage formed by machining a concave groove toward the rotor chamber along a shaft insertion hole portion making contact with the journal portion of the inner rotor and communicating with the filling space;
A rim passage formed in the inner rotor by chamfering an annular recessed groove or an inlet portion of the rotor chamber bottom side shaft insertion hole and communicating with the lubricating surface passage;

A bottom surface passage formed by machining into a concave groove along the bottom surface of the rotor chamber and communicating the rim passage with the suction port; .

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In a second form of the lubricating structure of the oil pump of the present invention,
A suction passage formed in the bottom surface of the rotor chamber and communicating with the suction passage, and a suction port formed in the bottom surface of the rotor chamber, the suction port being in communication with the discharge passage, A pump housing having an exhaust port and an axial insertion hole; A rotor inserted into the rotor chamber; A base plate installed between the rotor and the bottom of the rotor chamber; A cover coupled to the pump housing to close the rotor chamber; And a shaft of a drive source inserted into the shaft insertion hole,

A sealing member installed between the shaft insertion hole of the pump housing and the shaft so that the oil in the rotor chamber does not leak along the shaft;
A branch passage communicating with a filling space branched from the suction passage and formed by the journal portion of the inner rotor, the seal member, the shaft insertion hole, and the shaft;

A lubricant surface passage formed by machining a concave groove toward the rotor chamber along a shaft insertion hole portion making contact with the journal portion of the inner rotor and communicating with the filling space;
A rim passage communicating with the lubricating surface passage and formed by chamfering an annular recessed groove in the base plate or the inner rotor or an inlet portion of the rotor chamber bottom side shaft insertion hole;

A bottom surface passage formed by machining into a concave groove along the bottom surface of the rotor chamber and communicating the rim passage with the suction port; .

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In a third form of the lubricating structure of the oil pump of the present invention,
A suction passage formed in the bottom surface of the rotor chamber and communicating with the suction passage, and a suction port formed in the bottom surface of the rotor chamber, the suction port being in communication with the discharge passage, A pump housing having an exhaust port and an axial insertion hole; A rotor inserted into the rotor chamber; A cover coupled to the pump housing to close the rotor chamber; And a shaft of a drive source inserted into the shaft insertion hole,

A sealing member installed between the shaft insertion hole of the pump housing and the shaft so that the oil in the rotor chamber does not leak along the shaft;
A branch passage branched from the suction passage and communicated with the filling space formed by the sealing member, the shaft insertion hole and the shaft;

A lubricating surface passage formed in the concave groove toward the rotor chamber along a shaft insertion hole portion making contact with the shaft and communicating with the filling space;
A rim passage communicating with the lubricating surface passage and formed by chamfering an annular recessed groove in the shaft or the inner rotor or an inlet portion of the rotor chamber bottom side shaft insertion hole;

A bottom surface passage formed by machining into a concave groove along the bottom surface of the rotor chamber and communicating the rim passage with the suction port; .

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In a fourth aspect of the lubricating structure of the oil pump of the present invention,
A suction passage formed in the bottom surface of the rotor chamber and communicating with the suction passage, and a suction port formed in the bottom surface of the rotor chamber, the suction port being in communication with the discharge passage, A pump housing having an exhaust port and an axial insertion hole; A rotor inserted into the rotor chamber; A base plate installed between the rotor and the bottom of the rotor chamber; A cover coupled to the pump housing to close the rotor chamber; And a shaft of a drive source inserted into the shaft insertion hole,

A sealing member installed between the shaft insertion hole of the pump housing and the shaft so that the oil in the rotor chamber does not leak along the shaft;
A filling passage formed between the sealing member, the shaft insertion hole and the shaft, and a branch passage branched from the suction passage;

A lubricating surface passage formed in the concave groove toward the rotor chamber along a shaft insertion hole portion making contact with the shaft and communicating with the filling space;
An edge passage formed in the base plate or shaft by chamfering an annular recessed groove or an inlet portion of the rotor chamber bottom side shaft insertion hole and communicating with the lubricating surface passage;

A bottom surface passage formed by machining into a concave groove along the bottom surface of the rotor chamber and communicating the rim passage with the suction port; .

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According to the lubrication structure of the present invention having the above-described structure, there is no need for a high-performance sealing material capable of withstanding the high pressure of the discharge port, and a gap between the shaft and the inner rotor, It is possible to smoothly supply oil along the shaft insertion hole to achieve sufficient lubrication and to prevent noise and wear of the oil pump and to improve durability.

1 is a view showing a lubrication structure of a conventional oil pump;
2 is a view showing a lubrication structure of Embodiment 1 of the present invention.
3 is a view showing a lubrication structure of Embodiment 2 of the present invention.
4 is a view showing a lubrication structure of Embodiment 3 of the present invention.
5 is a view showing a lubrication structure of Embodiment 4 of the present invention.
6 is a diagram showing the flow of oil for lubrication in the present invention.
7 is a view showing a pump housing having a lubricating structure of the present invention.
8 is a view showing still another embodiment of the first embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the drawings in accordance with embodiments thereof.

≪ Example 1 >

2 is a view showing a lubrication structure of an oil pump according to Embodiment 1 of the present invention.

The oil pump according to the first embodiment includes the pump housing 10, the rotor 40, and the cover 70 by supplying oil from the outside through the suction passage 12 and discharging the oil to the discharge passage 13. The oil pump is driven by a drive source such as a motor.

The pump housing 10 is provided with a suction passage 12, a discharge passage 13, a suction port 80 communicating with the suction passage 12 and formed on the rotor chamber bottom surface 16, A discharge port 90 formed in the bottom surface 16 of the rotor chamber, and a shaft insertion hole 14 into which the shaft 100 of the drive source is inserted.

The rotor 40 is inserted into the rotor chamber 11 (see Fig. 7). The rotor chamber 11 is a space in which the rotor is inserted and sealed. The rotor chamber 11 is concave in the pump housing 10 as shown in Figs. 2 to 5 and is closed by the cover 70, 70 and closed together in cooperation with the pump housing 10 to become a rotor seal. In this description, the surface of the pump housing 10, in which the shaft insertion hole 14 is formed, is defined as the rotor chamber bottom surface 16 among the surfaces constituting the rotor chamber in any form.

A sealing member 110 is provided between the shaft insertion hole 14 of the pump housing 10 and the shaft 100 in order to prevent the oil in the rotor seal from leaking along the shaft 100. In addition, the shaft 100 is supported by the bearing 120.

The lubrication necessary for the inner rotor 41 and the out rotor 42 to rotate on the rotor chamber bottom surface 16 is possible by the oil filled in the pressure chamber 43 and the main lubrication target of this embodiment is the inner rotor 41 and the shaft insertion hole 14 are in contact with each other.

The lubrication of the present embodiment is performed by the oil supplied through the branch passage 15 branched from the suction passage 12 of the pump housing 10. [ The branch passage 15 communicates with the filling space 150 formed by the journal portion of the inner rotor 41, the sealing member 110, the shaft insertion hole 14, and the shaft 100.

The oil supplied from the branch passage 15 to the filling space 150 must be supplied to the surface where the journal portion of the inner rotor 41 and the shaft insertion hole 14 are in contact with each other, Is formed by machining into a concave groove toward the rotor chamber along a portion of the shaft insertion hole (14) which makes contact with the journal portion of the inner rotor (41). The lubricating face passage 200 is in communication with the filling space 150. The oil in the lubricant surface passage 200 is directly brought into contact with the journal portion of the inner rotor 41 to supply oil to the surface of the journal portion of the inner rotor 41, Sufficient lubrication can be achieved. As a result, various noise and abrasion can be prevented and durability can be improved.

The oil in the filling space 150 is also supplied to the rim passage 300 through the lubricating surface passage 200. The rim passage 300 is formed in the space formed by chamfering the rim of the shaft insertion hole 14 on the rotor chamber bottom surface 16 and in the region A indicated by the dotted line in Fig. As shown in FIG. The edge passage 300 may have a concave groove along the boundary between the lower surface or the lower surface of the inner rotor 41 and the journal portion or the journal portion. Figure 2 (b) Fig. 2 (c) shows an example in which concave grooves are formed along the journal portion of the inner rotor 41, and corresponds to the region A in Fig. 2 (a). The oil in the rim passage 300 flows into the suction passage 80 along the bottom surface passage 400 formed along the bottom surface of the rotor chamber.

As shown in Fig. 2 (b) and Fig. 2 (c), the edge passage 300 in the case where the inner rotor has the recessed groove is formed into an annular shape as shown in Fig. 6 (a) The edge passage 300 formed by chamfering the inlet portion of the shaft insertion hole 14 on the side 16 may be formed in the shape as shown in FIG. 6 (b). The lubrication surface passage 200 is formed to be vertically formed along the wall surface of the shaft insertion hole 14 but may be spirally formed along the cylindrical wall surface of the shaft insertion hole 14, And the filling space 150 may be formed on the wall surface of the shaft insertion hole 14 in any form.

The oil in the suction passage 12 flows into the suction port 80 through the branch passage 15, the filling space 150, the lubricating surface passage 200, the rim passage 300, and the bottom passage 400

The negative pressure in the suction port 80 causes the oil to pass through the communicated path from the branch passage 15 to the bottom surface passage 400 and sucked.

Accordingly, since an appropriate amount of oil flows into the suction port 80, and the oil pressure on the entire path through which oil flows for lubrication is not large, the sealing member 110 can also be used which has a low withstand pressure performance.

≪ Example 2 >

The second embodiment differs from the first embodiment in that the base plate 20 is inserted between the inner rotor 41 and the rotor chamber bottom surface 16 as shown in FIG. The base plate 20 is provided with a second suction port 24 and a second discharge port 25 penetrating in the thickness direction so that the oil of the suction port 80 and the discharge port 90 is supplied to the pressure chamber 43 It is natural that it is made to be able to become.

The insertion of the base plate 20 and the inner rotor 41 and the inlet of the shaft insertion hole 14 on the side of the rotor chamber floor 16 cooperates with the insertion of the base plate 20 the inner rotor 41 and the inlet of the shaft insertion hole 14 on the rotor chamber bottom 16 side can be formed in cooperation with each other (Fig. 3 (c)).

 3 (a)) formed by chamfering the rim of the shaft insertion hole 14 of the rotor chamber bottom surface 16, or the shape of the rim of the base plate 20 3 (b)) or the journal portion of the inner rotor 41 (Fig. 3 (c)).

≪ Example 3 >

The third embodiment differs from the first embodiment in that a journal portion is not provided in the inner rotor 41 as shown in FIG. The flange passage 300 is formed by the shaft 100 and the inner rotor 41 and the rotor seal bottom 110. The sealing space 110 is formed by the sealant 110, the shaft insertion hole 14 and the shaft 100, 4 (a), (b)) or the shaft 100 and the inlet of the shaft insertion hole 14 on the side of the rotor room floor 16 are formed cooperatively (Fig. 4 (c)).

That is, the rim passage 300 is formed in a shape (a dotted line display area A in Fig. 4 (a)) formed by chamfering the rim of the shaft insertion hole 14 on the rotor chamber bottom 16 side, 4 (b)) or the shaft 100 (Fig. 4 (c)).

<Example 4>

The fourth embodiment differs from the second embodiment in that a journal portion is not provided in the inner rotor 41 as shown in FIG. The shaft 100 and the base plate 20 are rotatably supported by the shaft 100 and the shaft 100. The shaft 100 and the base plate 20 are rotatably supported by the shaft 100, 5A and 5B or the shaft 100 and the inlet of the shaft insertion hole 14 on the side of the rotor chamber bottom 16 cooperate with each other (Fig. 5 (c)).

5 (a)) formed by chamfering the rim of the shaft insertion hole 14 of the rotor chamber bottom surface 16, or the shape of the rim of the base plate 20 5 (b)) or the shaft 100 (Fig. 5 (c)).

7 is a perspective view of a pump housing in which the inlet portion of the shaft insertion hole 14 on the rotor chamber bottom surface 16 is chamfered to form the rim passage 300 as shown in Figs. 2 (a) and 3 (a) The structure of the embodiments can be more clearly understood.

In addition, in the present description, the entrance of the shaft insertion hole 14 on the rotor chamber bottom surface 16 is formed by the two (2) pieces around the boundary where the cylindrical surface (indicated by reference numeral 14 in FIG. 7) It means an area formed by a face, or an area formed by one of the faces.

In the present specification, the presence or absence of the side plate 30 is not essential for realizing the technical idea of the present invention. Therefore, a detailed description thereof is omitted. However, the ordinary person skilled in the art can easily determine whether or not the side plate 30 is provided You will be able to decide.

10: pump housing 11: rotor chamber 12: suction passage 13:
14: shaft insertion hole 15: branch passage 16: rotor chamber bottom surface
20: base plate 24: second suction port 25: second exhaust port
30: side plate 40: rotor 41: inner rotor 42: out rotor
43: pressure chamber 70: cover 80: suction port 90: exhaust port
100: shaft 110: sealing material 120: bearing 150: filling space
200: lubrication surface passage 300: rim passage 400: bottom surface passage

Claims (4)

  1. A suction passage formed in the bottom surface of the rotor chamber and communicating with the suction passage, and a suction port formed in the bottom surface of the rotor chamber, the suction port being in communication with the discharge passage, A pump housing having an exhaust port and an axial insertion hole; A rotor inserted into the rotor chamber; A cover coupled to the pump housing to close the rotor chamber; And a shaft of a drive source inserted into the shaft insertion hole,

    A sealing member installed between the shaft insertion hole of the pump housing and the shaft so that the oil in the rotor chamber does not leak along the shaft;
    A branch passage branched from the suction passage and communicating with a filling space formed by the inner rotor, the seal member, the shaft insertion hole and the shaft;

    A lubricant surface passage formed by machining a concave groove toward the rotor chamber along a shaft insertion hole portion making contact with the journal portion of the inner rotor and communicating with the filling space;
    An edge passage formed by chamfering an annular recessed groove in the inner rotor or an inlet portion of the rotor chamber bottom side shaft insertion hole and communicating with the lubricating surface passage;
    A bottom surface passage formed by machining into a concave groove along the bottom surface of the rotor chamber and communicating the rim passage with the suction port; Wherein the oil pump has a lubrication structure.
  2. A suction passage formed in the bottom surface of the rotor chamber and communicating with the suction passage, and a suction port formed in the bottom surface of the rotor chamber, the suction port being in communication with the discharge passage, A pump housing having an exhaust port and an axial insertion hole; A rotor inserted into the rotor chamber; A base plate installed between the rotor and the bottom of the rotor chamber; A cover coupled to the pump housing to close the rotor chamber; And a shaft of a drive source inserted into the shaft insertion hole,

    A sealing member installed between the shaft insertion hole of the pump housing and the shaft so that the oil in the rotor chamber does not leak along the shaft;
    A branch passage communicating with a filling space branched from the suction passage and formed by the journal portion of the inner rotor, the seal member, the shaft insertion hole, and the shaft;

    A lubricant surface passage formed by machining a concave groove toward the rotor chamber along a shaft insertion hole portion making contact with the journal portion of the inner rotor and communicating with the filling space;
    A rim passage communicating with the lubricating surface passage and formed by chamfering an annular recessed groove in the base plate or the inner rotor or an inlet portion of the rotor chamber bottom side shaft insertion hole;
    A bottom surface passage formed by machining into a concave groove along the bottom surface of the rotor chamber and communicating the rim passage with the suction port; Wherein the oil pump has a lubrication structure.
  3. A suction passage formed in the bottom surface of the rotor chamber and communicating with the suction passage, and a suction port formed in the bottom surface of the rotor chamber, the suction port being in communication with the discharge passage, A pump housing having an exhaust port and an axial insertion hole; A rotor inserted into the rotor chamber; A cover coupled to the pump housing to close the rotor chamber; And a shaft of a drive source inserted into the shaft insertion hole,

    A sealing member installed between the shaft insertion hole of the pump housing and the shaft so that the oil in the rotor chamber does not leak along the shaft;
    A branch passage branched from the suction passage and communicated with the filling space formed by the sealing member, the shaft insertion hole and the shaft;

    A lubricating surface passage formed in the concave groove toward the rotor chamber along a shaft insertion hole portion making contact with the shaft and communicating with the filling space;
    A rim passage communicating with the lubricating surface passage and formed by chamfering an annular recessed groove in the shaft or the inner rotor or an inlet portion of the rotor chamber bottom side shaft insertion hole;
    A bottom surface passage formed by machining into a concave groove along the bottom surface of the rotor chamber and communicating the rim passage with the suction port; Wherein the oil pump has a lubrication structure.
  4. A suction passage formed in the bottom surface of the rotor chamber and communicating with the suction passage, and a suction port formed in the bottom surface of the rotor chamber, the suction port being in communication with the discharge passage, A pump housing having an exhaust port and an axial insertion hole; A rotor inserted into the rotor chamber; A base plate installed between the rotor and the bottom of the rotor chamber; A cover coupled to the pump housing to close the rotor chamber; And a shaft of a drive source inserted into the shaft insertion hole,

    A sealing member installed between the shaft insertion hole of the pump housing and the shaft so that the oil in the rotor chamber does not leak along the shaft;
    A filling passage formed between the sealing member, the shaft insertion hole and the shaft, and a branch passage branched from the suction passage;

    A lubricating surface passage formed in the concave groove toward the rotor chamber along a shaft insertion hole portion making contact with the shaft and communicating with the filling space;
    An edge passage formed in the base plate or shaft by chamfering an annular recessed groove or an inlet portion of the rotor chamber bottom side shaft insertion hole and communicating with the lubricating surface passage;
    A bottom surface passage formed by machining into a concave groove along the bottom surface of the rotor chamber and communicating the rim passage with the suction port; Wherein the oil pump has a lubrication structure.
KR1020160019858A 2016-02-19 2016-02-19 Lubrication Structure For Oil Pump KR101803273B1 (en)

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KR1020160019858A KR101803273B1 (en) 2016-02-19 2016-02-19 Lubrication Structure For Oil Pump

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Application Number Priority Date Filing Date Title
KR1020160019858A KR101803273B1 (en) 2016-02-19 2016-02-19 Lubrication Structure For Oil Pump

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KR20170098013A KR20170098013A (en) 2017-08-29
KR101803273B1 true KR101803273B1 (en) 2017-11-30

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2528013Y2 (en) * 1989-04-28 1997-03-05 株式会社ユニシアジェックス Oil pump
JP2006070813A (en) * 2004-09-02 2006-03-16 Hitachi Powdered Metals Co Ltd Internal gear pump for water
JP2007056684A (en) 2005-08-22 2007-03-08 Kayaba Ind Co Ltd Vane pump
KR101520766B1 (en) 2014-05-20 2015-05-18 마그나파워트레인코리아 주식회사 Motor Unit, Pump Unit And Electric Oil Pump Using The Sames

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2528013Y2 (en) * 1989-04-28 1997-03-05 株式会社ユニシアジェックス Oil pump
JP2006070813A (en) * 2004-09-02 2006-03-16 Hitachi Powdered Metals Co Ltd Internal gear pump for water
JP2007056684A (en) 2005-08-22 2007-03-08 Kayaba Ind Co Ltd Vane pump
KR101520766B1 (en) 2014-05-20 2015-05-18 마그나파워트레인코리아 주식회사 Motor Unit, Pump Unit And Electric Oil Pump Using The Sames

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