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公开(公告)号：US11131282B2
公开(公告)日：2021-09-28
申请号：US16800006
申请日：2020-02-25
申请人： DENSO CORPORATION
发明人： Naoya Tamai
IPC分类号： F02M45/06 , F02M59/44 , F02M59/10 , F04B9/04 , F04B1/0413 , F04B1/0417
摘要： A fuel injection pump pressurizes and injects fuel. A cam rotates about a rotational axis of the cam. A housing includes a cam chamber that houses the cam and a sliding chamber communicated to the cam chamber. A roller rotates while being in contact with a surface of the cam. A shoe reciprocates in the sliding chamber by rotation of the cam and is in contact with and slides on a surface of the roller. A plunger reciprocates with the shoe. A cylinder houses the plunger and includes a pump chamber to pressurize and feed the fuel by reciprocation of the plunger. A deformed section is a groove or a protrusion which extends in a direction of a rotational axis of the cam, on a part of a surface of the cam, and has a shape different from a cam profile of the cam.
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公开(公告)号：US10808665B2
公开(公告)日：2020-10-20
申请号：US16641393
申请日：2018-07-27
申请人： Robert Bosch GmbH
发明人： Michael Imhof , Robert Mayer
摘要： A camshaft (24), in particular for a pump (10), is proposed. The camshaft (24) has at least two cams (26, 28) which are arranged next to one another in the direction of the longitudinal axis (25) of the camshaft (24) and the cam elevations of which are arranged offset with respect to one another around the longitudinal axis (25) of the camshaft (24). An intermediate region (30) is provided between two adjacent cams (26, 28), and at least one bearing region (32) is arranged next to the cams (26, 28) in the direction of the longitudinal axis (25) of the camshaft (24). The intermediate region (30) runs in axial longitudinal sections which contain the longitudinal axis (25) of the camshaft (24), at a radial spacing (r1, r2) from the longitudinal axis (25) of the camshaft (24), which radial spacing (r1, r2), starting from the adjacent cam (26) with the smaller cam elevation (h1) in the respective axial longitudinal section, increases towards the adjacent cam (28) with the greater cam elevation (h2) in the respective axial longitudinal section.
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公开(公告)号：US11333136B2
公开(公告)日：2022-05-17
申请号：US16197508
申请日：2018-11-21
申请人： AISIN CORPORATION
发明人： Hisashi Ono , Katsuhiko Takasu , Koji Nunami
IPC分类号： F04B9/04 , F04B1/0413 , F04B1/0426 , F04B1/0421 , F04B11/00 , F04B1/053 , F04B1/20 , F04B17/05
摘要： A fluid pump includes: three or more volume chambers that suction and discharge a fluid sequentially; moving elements that are respectively provided in the volume chambers, move relative to the volume chamber, and suction and discharge the fluid from and to the volume chamber; a cam that abuts against and drives the moving elements; and a driving section that drives at least one of the moving elements and the cam and relatively rotates the moving elements and the cam to discharge the fluid one time from each of the volume chambers in one cycle of the relative rotation, in which, when suctioning and discharging the fluid, regarding a discharge rotation angle α, α=(Z/M)×N is satisfied, where the number of volume chambers is M and any integer from 2 to (M−1) is N.
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公开(公告)号：US10907623B2
公开(公告)日：2021-02-02
申请号：US15831473
申请日：2017-12-05
IPC分类号： F04B9/04 , F04B1/0408 , F04B1/0413 , F04B1/0439 , F04B1/053 , F04B17/03 , F16H25/14 , F16H25/18 , F16H53/02 , F16H53/06 , F04B53/14
摘要： A cam mechanism for converting a swiveling movement of a drive-side shaft into a linear output movement. A cam disk is attached to the drive-side shaft, a slider is shiftable in a linear guide, and a cam follower is applied against the circumferential surface of the cam disk. Swiveling movement of the cam disk leads to a linear output movement of the slider in the linear guide. The circumference of the cam disk is spiral-shaped at least in sections, and the radius of the cam disk increases monotonically in the spiral-shaped section from a start radius to an end radius along a swiveling direction. By selecting two reversal points within the spiral-shaped section, the setting of a variable stroke can occur. A piston pump is provided with the cam mechanism and a method is provided for using the cam mechanism and the piston pump.
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公开(公告)号：US10788025B2
公开(公告)日：2020-09-29
申请号：US15464766
申请日：2017-03-21
申请人： DENSO CORPORATION
发明人： Michihisa Ishikura , Seiji Kunihiro
IPC分类号： F04B9/04 , F04B1/066 , F04B1/0413 , F04B1/06 , F02M59/10 , F02M59/02 , F04B53/14 , F02D41/38
摘要： A fuel pump includes a cylinder that forms a compression chamber which pressurizes a fuel, a plunger that compresses the fuel in the compression chamber, a cam that pushes the plunger, and a driven gear that engages a driving gear to transmit a rotational driving force. A profile of the cam is configured such that a peak arrival range is half or less of a compression range. Cam speed is obtained by differentiating a lift amount of the plunger by a rotation angle of the cam, the compression range is an angle range during which the plunger is pushed in the direction of compressing the fuel, and the peak arrival range is an angle range from a start of the compression range until a most retarded position of a peak of the cam speed.
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6.发明授权公开(公告)号：US11639654B2
公开(公告)日：2023-05-02
申请号：US17664578
申请日：2022-05-23
发明人： Tony Yeung
IPC分类号： E21B43/26 , F04B53/00 , F04B19/04 , F04B1/04 , F04B1/0404 , F04B1/0413 , F04B11/00 , F04B53/14 , F04B39/14 , F04B13/02 , F04B39/00
摘要： Systems and methods to enhance the flow of fracturing fluid into a wellhead during a high-pressure fracturing operation may include providing a pump frame and a crankshaft. A plurality of first plungers may be connected to the crankshaft and may reciprocate in a first plane. The hydraulic fracturing pump also may include a plurality of second plungers connected to the crankshaft and positioned to reciprocate in a second plane. The first plane and the second plane may define a non-zero offset angle between the first plane and the second plane. The crankshaft may include a plurality of crankpins, and each of the crankpins may be connected to one of the first plungers and one of the second plungers. The first plungers may pump a first fracturing fluid and the second plungers may pump a second fracturing fluid different from the first fracturing fluid.
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7.发明申请公开(公告)号：US20230082868A1
公开(公告)日：2023-03-16
申请号：US17989607
申请日：2022-11-17
发明人： Tony Yeung
IPC分类号： E21B43/26 , F04B53/00 , F04B19/04 , F04B1/04 , F04B1/0404 , F04B1/0413 , F04B11/00 , F04B53/14 , F04B39/14 , F04B13/02 , F04B39/00
摘要： Systems and methods to enhance the flow of fracturing fluid into a wellhead during a high-pressure fracturing operation may include providing a pump frame and a crankshaft. A plurality of first plungers may be connected to the crankshaft and may reciprocate in a first plane. The hydraulic fracturing pump also may include a plurality of second plungers connected to the crankshaft and positioned to reciprocate in a second plane. The first plane and the second plane may define a non-zero offset angle between the first plane and the second plane. The crankshaft may include a plurality of crankpins, and each of the crankpins may be connected to one of the first plungers and one of the second plungers. The first plungers may pump a first fracturing fluid and the second plungers may pump a second fracturing fluid different from the first fracturing fluid.
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公开(公告)号：US11293418B2
公开(公告)日：2022-04-05
申请号：US16197508
申请日：2018-11-21
申请人： AISIN CORPORATION
发明人： Hisashi Ono , Katsuhiko Takasu , Koji Nunami
IPC分类号： F04B9/04 , F04B1/0413 , F04B1/0426 , F04B1/0421 , F04B11/00 , F04B1/053 , F04B1/20 , F04B17/05
摘要： A fluid pump includes: three or more volume chambers that suction and discharge a fluid sequentially; moving elements that are respectively provided in the volume chambers, move relative to the volume chamber, and suction and discharge the fluid from and to the volume chamber; a cam that abuts against and drives the moving elements; and a driving section that drives at least one of the moving elements and the cam and relatively rotates the moving elements and the cam to discharge the fluid one time from each of the volume chambers in one cycle of the relative rotation, in which, when suctioning and discharging the fluid, regarding a discharge rotation angle α, α=(Z/M)×N is satisfied, where the number of volume chambers is M and any integer from 2 to (M−1) is N.
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公开(公告)号：US20220349393A1
公开(公告)日：2022-11-03
申请号：US17867207
申请日：2022-07-18
发明人： James O. Myrhum, JR.
IPC分类号： F04B1/043 , F04B1/0413
摘要： Embodiments of the invention provide a pump assembly for a hydraulic tool. The pump assembly can include a reciprocating element that is configured to move between a retracted position and an extended position, a cam surface in the reciprocating element that can engage cam followers, a rotating element that can receive rotational input, and a base that can at least partially surrounds the rotating element. Movement of the cam followers along the cam surface can move the reciprocating element from the retracted position to the extended position.
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公开(公告)号：US11187220B2
公开(公告)日：2021-11-30
申请号：US14370707
申请日：2013-01-14
申请人： Stuart H. Bassine
发明人： Stuart H. Bassine
摘要： A compressor moves a fluid from an inlet to an outlet and provides a pressure differential there between due to respective pistons moving in and out of a plurality of piston chambers via a piston rod. A rotating shaft extends through a grooved end plate, and the rotating shaft is connected to either the grooved end plate or the piston rod. The grooved end plate defines an off center or eccentric groove. A bearing extends from the piston rod and fits within the groove such that when the rotational motion of the shaft rotates either the piston rod or the grooved end plate, the piston rod slides back and forth relative to the rotating shaft. Each position of the bearing within the groove determines a corresponding position of the piston rod relative to the rotating shaft. Each pair of pistons may extend from a single, continuous piston rod.
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