KR20210108424A - vane pump with hollow slewing pin with fastener - Google Patents

Abstract

A vane pump comprising: a housing; a swivel pin mounted therein having a hollow portion; displaced about the slewing pin between a first slide position and a second slide position within the housing to regulate discharge of the pump through the outlet; A vane pump comprising: a possible control slide; and a cover attached to the housing via a fastener passing through the pivot pin, wherein the cover causes the control slide to rotate about the pivot pin relative to the housing and cover. , is disclosed. In one example, the fastener passes through to the engine mount. The pivot pin does not create a fluid path through the hollow portion.

Description

vane pump with hollow slewing pin with fastener

Cross-references to related applications

The subject matter's application claims priority to U.S. Provisional Application Serial No. 62/785,960, filed December 28, 2018, the subject matter of which is incorporated herein by reference in its entirety.

technical field

The present disclosure relates generally to vane pumps. More specifically, the present disclosure relates to a slewing pin and assembly of a vane pump.

Vane pumps are known for use in pumping fluids or lubricants, such as oil in automobiles. Vane pumps include vanes that move radially relative to a rotor that is mounted eccentrically inside a housing. Movement of the rotors and vanes creates one or more control chamber volumes in which fluid can be pressurized and further discharged through the outlet of the pump. The vane pump may have a single control chamber or two control chambers for moving the lubricant.

Aspects of the present disclosure provide a vane pump comprising: a housing, a pivot pin having a hollow portion mounted therein, a first slide position and a second slide within the housing to regulate displacement of the pump through the outlet; A control slide displaceable about the pivot pin between positions, and a cover attached to the housing through a fastener passing through the pivot pin, wherein the cover causes the control slide to rotate about the pivot pin relative to the housing and cover. It provides a vane pump comprising a. The pivot pin does not create a fluid path through the hollow portion.

Other aspects and features of the present disclosure will become apparent from the detailed description that follows, the accompanying drawings, and the appended claims.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate one or more embodiments, and together with the description, represent such embodiments. The accompanying drawings are not necessarily drawn to scale. Any values of dimensions illustrated in the accompanying graphs and drawings are for illustrative purposes only, and may or may not represent actual or preferred values or dimensions. Where applicable, some or all features may not be illustrated to help explain the underlying features. In the drawings:
1A is a first perspective view of a vane pump, in accordance with an embodiment of the present disclosure;
1B is a second perspective view of a vane pump, in accordance with an embodiment of the present disclosure;
2 is an exploded view of the vane pump of FIGS. 1A and 1B , in accordance with an embodiment of the present disclosure;
3 is a view of a vane pump with a cover removed, illustrating a control slide arrangement, in accordance with an embodiment of the present disclosure;
4 is a perspective view of a vane pump illustrating assembly of a ball to an engine block, in accordance with an embodiment of the present disclosure;
5A is a perspective view when viewed from a cover, in accordance with an embodiment of the present disclosure;
Fig. 5B is a cross-sectional view through section line AA of Fig. 5A; and
6A, 6B, 6C, and 6D are various projections, such as a top view, a front view, a bottom view, and a side view, respectively, of a vane pump, in accordance with an embodiment of the present disclosure.

DETAILED DESCRIPTION The description set forth below in connection with the appended drawings is intended as a description of various embodiments of the disclosed subject matter, and is not necessarily intended to represent the only embodiment(s). In certain instances, the description includes specific details for the purpose of providing an understanding of the disclosed embodiment(s). It will be apparent, however, to one skilled in the art, that the disclosed embodiment(s) may be practiced without such specific precautions. In some instances, well-known structures and components may be described in block diagram form in order to avoid obscuring the concepts of the disclosed subject matter.

Reference throughout the specification to “one embodiment” or “an embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the disclosed subject matter. do. Thus, the appearances of the phrases "in one embodiment" or "in one embodiment" in various places throughout the specification are not necessarily referring to the same embodiment. Furthermore, certain specific configurations, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Further, embodiments of the disclosed subject matter are intended to cover modifications and variations thereof.

It should be understood that terms such as "inner", "outer" and the like, which may be used herein, describe points of reference only and do not necessarily limit embodiments of the present disclosure to any particular orientation or configuration. . In addition, terms such as “first,” “second,” “third,” and the like refer merely to multiple parts, components, steps, acts, functions, and Identifies one of the reference points, and likewise not necessarily limiting embodiments of the present disclosure to any particular orientation or configuration or to any requirement that each number must be included.

1A and 1B are a first perspective view (as viewed from the housing side) and a second perspective view (as viewed from the cover side) of the vane pump 100 of an embodiment of the present disclosure. In one embodiment, the vane pump 100 is a variable vane pump having a plurality of chambers. The vane pump 100 has a housing 12 and a cover 2 attached to the housing 12 . The cover 2 is attached to the housing 12 , for example via fasteners 26 , 27 , which are inserted into various fastener bores provided along the perimeter of the cover 2 and housing 12 . do. The various internal components of the vane pump 100 (eg, the vanes 7, rotor 5, slewing pin 4, etc. shown in FIG. 2) are provided with a housing 12 and a cover 2 ) is surrounded by The vane pump 100 further includes a valve controller 18 housed inside the housing 12 . The internal components of the vane pump 100 are illustrated in the exploded view of the vane pump 100 of FIG. 2 , although not visible in FIGS. 1A and 1B .

The housing 12 (eg, of FIGS. 1A and 1B and 2 ) has an inlet 28 for receiving fluid into the housing 12 and discharging pressurized fluid into the system, eg, into an engine. or for conveying, with an outlet 29 . Housing 12 may be made of any material, and may be formed by aluminum die casting, iron casting, or any other known fabrication technique. The housing 12 is disposed between the housing 12 and a control slide 25 (see FIG. 3 ) for selectively receiving pressurized fluid or exhaust pressure via 127 , a first control chamber 126 and possibly a second control chamber 126 . It may enclose inner chambers, such as two chambers 127 . In one embodiment, the first control chamber 126 and the second chamber 127 are on either side of the pivot pin 4 (shown in FIGS. 2 and 3 ) and are isolated from each other. The first chamber 126 always has a feedback pressure, while the second chamber 127 can be pressured or evacuated depending on the valve controller 18 . In other words, the first chamber 126 and the second chamber 127 are not fluidly connected around the pivot pin 4 . The first control chamber 126 contains pressurized fluid to move the control slide 25 to reduce its eccentricity with respect to the rotor 5 to reduce the pump discharge. Another chamber 128 is connected to the outlet portion and outlet of the pump, for example allowing outlet oil to pass over and/or under the slide 25 . Another chamber 124 is connected to the inlet and helps limit leakage from chambers 126 , 127 . The housing 12 may include a chamber for receiving the valve controller 18 , which may be configured to deliver pressurized fluid from the first chambers 126 of the pump. The valve controller 18 may be connected to the housing 12 via a clip 19 .

The cover 2 may be made of any material, and may be formed by aluminum die casting, powder metal forming, forging, or any other desired manufacturing technique. A gasket or other seal(s) may optionally be provided between the cover 2 and the peripheral wall of the housing 12 to seal the interior chambers. The housing 12 and cover 2 have several surfaces for receiving sealing engagement (eg, slide seal 14 and slide seal support 13 of FIG. 2 ) and movement.

FIG. 2 is an exploded view of the vane pump 100 , illustrating the internal components of the pump disposed between the cover 2 and the housing 12 . For example, the internal components connect to a control slide 25 , a dowel pin 3 (eg, for alignment of components such as cover 2 and housing 12 ). a pivot pin 4 to be formed, a rotor 5, two vane rings 6 on both sides of the rotor 5, a plurality of vanes 7 (collectively referred to as vanes 7), a slide seal support ( 13) and a control slide 25, a spring 15, assembled with the slide seal 14, and a release ball 11, a release spring 10, a cup plug 9, and a circlip 8. which includes a relaxation mechanism.

2 and 3 , the control slide 25 is displaceable within the housing 12 and with respect to the cover 2 . For example, the control slide 25 may occupy a first slide position, a neutral/default position, and a second slide position to regulate the displacement of the vane pump 100 through the outlet. In one embodiment, the control slide 25 is pivotally mounted (eg, about the pivot pin 4 ) and is positioned inside the housing 12 between the first and second slide positions. is configured for the pivotal displacement of (eg, from its neutral position to its minimum displacement position). More specifically, the control slide may have any number of positions remote from the first slide position and, in one embodiment, may include when the slide is close to the minimum ejection position, or the minimum ejection position. it could be The control slide 25 may be pivotally mounted relative to the first control chamber 126 and the second control chamber 127 inside the housing 12 .

A first control chamber 126 is provided in the housing 12 on a first side of a control slide 25 provided on one side of the pivot pin 4, while a second chamber 127 comprises: It is provided on a second side opposite to the control slide 25 provided on the other side of the pivot pin 4 . In one embodiment, chambers 126 , 127 are isolated from each other and do not (eg, fluidly) communicate with each other. Chambers 126 , 127 are not connected to each other, and chamber 127 is connected to the inlet. To reduce the pump discharge flow (i.e., by reducing eccentricity), slide 25 is moved toward its second slide position (or second pivoting direction) in a second direction opposite the first direction. A positive pressure from the pressurized lubricant, which may be pressurized, may be applied or supplied to the control chamber 126 . Such pressure may be fed back from the outlet side of the pump or from an external system.

Specifically, in one embodiment in which the control slide 25 pivots, a pivot pin 4 or similar feature may be provided to guide the pivoting motion of the control slide 25 . In one embodiment, the pivot pin 4 may be rotatably mounted to the housing 12 and the cover 2 , and the control slide 25 may be secured to the pivot pin, thus 4) and thereby the control slide 25 freely pivots or rotates within the cover 2 and the housing 12 . The configuration of the pivot connection of the control slide 25 in the housing 12 is not limited. In one embodiment, the control slide 25 is rotatably fixed to the pivot pin 4 for pivoting along an axis. More specifically, in one embodiment, the pivot pin 4 is configured to be press fit inside the opening of the control slide 25 . The outer surface(s) of the pivot pin 4 may, for example, couple and/or contact the surface of the control slide 25 .

In one embodiment, the pivot pin 4 can be secured (eg, by a press fit) to the housing 12 and cover 2 , while the control slide 25 includes the pivot pin ( 4) rotates freely around the center.

The pivot pin 4 (shown in FIGS. 2 , 3 , 4 , 5A and 5B and FIGS. 6A-6D ), such as a bolt, a shaft, and a screw, (referred to interchangeably as a fastener ) a hollow pin with open ends for receiving a fastening device. The pivot pin 4 has a substantially cylindrical shape, taking the form of a hollow tubular cylinder. In one embodiment, the pivot pin 4 attaches a fastening device (eg bolt 21 ), eg allowing additional means for fastening the cover 2 to the engine block in this case. or, in other instances, the cover 2 is bolted to the housing 12 without creating additional fastening structures, such as fastening holes on the housing 12 and/or the cover 2 . can be Thus, the slewing pin 4 saves space and creates a compact vane pump design. In one embodiment, the additional bolt 21 prevents a gap from forming between the cover 2 and the housing 12 and thus prevents leakage of fluid through the gap. The outer surface (ie the circumferential surface) of the pivot pin 4 may not have any holes or grooves, so that fluid can flow from the chambers (eg, 126 ) around the pivot pin 4 . will not be able to enter the hollow part 4a (see FIG. 3) of In one embodiment, the hollow portion 4a of the pivot pin 4 may be threaded to correspond to the thread of the fastening device (eg bolt 21 ).

When a fastening device (eg bolt 21 ) is inserted through pivot pin 4 , the hollow portion and open ends are substantially closed, and a fluid path through the hollow portion of pivot pin 4 . does not provide Thus, in operation, fluid within or around the vane pump 100 will not be able to flow through the pivot pin 4 . In one embodiment, the fastening device is not in contact with the fluid inside the housing 12 . In one embodiment, the bolt 21 may be inserted through the housing 12 (see FIGS. 1A, 4, 5A, 6A, 6C and 6D) into the hollow portion of the pivot pin 4 and , and may extend further out from the cover 2 (see FIGS. 1B , 5B and 6A-6D ) to allow attachment of the nut. In one embodiment, the nut provides a means for providing a variable pressure to securely fasten (or disengage) the cover 2 to the housing 12 . Alternatively, as shown in the cross-sectional view of FIG. 5B , the pivot pin 4 extends partially through the cover 2 and is partially enclosed within the housing 12 , so that the hollow portion comprises: The fluid trapped between 12 ) and the cover 2 is inaccessible. Accordingly, no fluid path is created through the hollow part of the pivot pin 4 .

In addition, the pivot pin 4 is, for example, through which the pivot pin 4 will pass through a hollow part and/or, as discussed above, in which the chambers 127 , 126 (shown in FIG. 3 ) are located. Keeps the second chamber 127 isolated from the control chamber 126 as it does not create a fluid path for the fluid to pass inside the housing 12 to either side of the pin 4 . The pivot pin 4 also provides a location dowel for mounting the pump to the engine block.

In one embodiment, the control slide 25 is centered about the pivot pin 4 to change the position and motion of the rotor 5 and vane(s) 7 relative to the inner surface of the control slide 25 . swiveled, thereby altering the dispensing of the fluid through the outlet and discharging of the pump without passing the fluid through the hollow portion of the slewing pin 4 . The spring 15 biases or urges the control slide 25 in the first direction towards its first slide position (or first pivoting direction or position, or maximum displacement position). While the control slide 25 pivots from the first position to the second position, the fluid may be pressurized without passing through the hollow portion of the pivot pin 4 .

Referring to FIG. 3 , the rotor 5 has one radially extending vane 7 mounted on the rotor 5 for radial movement. Specifically, each vane 7 is mounted at its proximal end in a radial slot in the center ring 6 of the rotor 5 in a manner that allows them to slide radially. A centrifugal force moves the vanes 7 radially outward so as to engage and/or maintain engagement between the inner or inner surface of the control slide 25 and the distal ends of the vanes 7 during rotation of the control slide. can be pressed with This type of mounting is commonly and well known. In one embodiment, other variations may be used, such as springs in slots for biasing the vanes radially outward, without limiting the scope of the present disclosure.

The spring 15 (shown in FIGS. 2 and 3 ) may be a coil spring or a leaf spring. In one embodiment, the spring 15 is used to bias and/or return the control slide 25 to its default or biased position (eg, a default position for maximum eccentricity with the rotor 5 ). do. The control slide 25 is oriented against the spring 15 to reduce the eccentricity with the rotor 5 based on the pressure inside the outlet of the vane pump 100 to regulate the discharge and and thus the discharge flow. can be moved

The seal 14 and the slide seal support 13 (shown in FIG. 2 ) slide control between their slide positions along the wall of the housing 12 while still maintaining the seal against the housing 12 . (25) helps the movement. Seal 14 also helps limit leakage from respective chambers 126 , 127 , 128 back to 124 .

A retainer 16 or screen 17 is also provided in the housing 12 (see FIG. 2 ). A screen 17 filters the inlet, and a retainer 16 holds the seal in place.

In one embodiment, screws 26 , 27 may be used to attach the cover 2 to the housing 12 . The housing 12 has corresponding threaded holes for receiving the screws 26 , 27 . In one embodiment, screws 26 , 27 are attached to the perimeter of cover 2 and housing 12 , without penetrating or contacting an internal component of the housing, such as control slide 25 . it could be In one embodiment, the screws 26 , 27 may be coplanar with the surface of the cover 2 when assembled with the housing 12 (ie, do not protrude from the surface).

Although the principles of the present disclosure have been made clear in the exemplary embodiments described above, various modifications may be made to the structure, arrangement, proportions, elements, materials, and components used in the practice of the present disclosure. It will be apparent to those skilled in the art that this can be done.

Accordingly, it will be ascertained that the features of the present disclosure have been fully and effectively achieved. It will be appreciated, however, that the specific preferred embodiments above have been shown and described for purposes of illustrating the functional and structural principles of the present disclosure, and that changes may be made without departing from such principles. Accordingly, this disclosure includes all modifications included within the spirit and scope of the appended claims.

Claims (3)

As a vane pump:
housing;
a tubular pivot pin having a hollow portion mounted inside the housing;
a control slide mounted to the pivot pin for displacement between a first slide position and a second slide position within the housing to regulate the discharge of the pump through the outlet; and
a cover attached to the housing through a fastener passing through the pivot pin
including,
wherein the pivot pin does not create a fluid path through the hollow portion. According to claim 1,
a control chamber on the first side of the control slide; and
a second chamber on the second side of the control slide between the housing and the control slide
further comprising,
wherein the second chamber and the control chamber are not fluidly connected around the pivot pin. According to claim 1,
wherein the fastener is a bolt passing through the housing, the hollow portion of the pivot pin, and the cover to create an attachment between the components of the pump.

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