公开(公告)号：US4340337A

公开(公告)日：1982-07-20

申请号：US101790

申请日：1979-12-10

Applicant: Ian T. Bristow ,  Nigel J. Petts

Inventor： Ian T. Bristow ,  Nigel J. Petts

IPC: F16K17/30 ,  F04B20060101 ,  F04B1/08 ,  F04B49/00 ,  F04B49/02 ,  F04B49/08 ,  F04B53/10 ,  F04C14/26

CPC classification number: F04C14/26

Abstract: A positive displacement pump system has first and second delivery passages for the pumped fluid and a main discharge passage. A control valve operating in dependence on the pressure drop across an orifice in the discharge passage diverts through overspill porting a proportion of the flow through the second delivery passage, the remainder added to the flow from the first delivery passage and passed to the discharge passage. The control valve also regulates the by-passing of a proportion of the flow from the first delivery passage to the overspill porting. As the said pressure drop increases, the control valve first increases the proportion of the flow from the second delivery passage diverted to the overspill porting and, as the pressure drop increases further, then commences to by-pass fluid from the first delivery passage to the overspill port, the quantity by-passed increasing with increase of said pressure drop. For a given movement of the valve member, the increase of effective area of communication between the second delivery passage and the overspill porting is greater than that between the first delivery passage and the overspill porting.

Abstract translation: 正排量泵系统具有用于泵送流体和主排放通道的第一和第二输送通道。 根据排放通道中的孔口上的压降而操作的控制阀通过穿过第二输送通道的流量的一部分流过切口，其余部分添加到来自第一输送通道的流中并传递到排出通道。 控制阀还调节从第一输送通道到溢出口的一部分流量的旁路。 当所述压力降增加时，控制阀首先增加从转向第二输送通道到溢出口的流量的比例，并且随着压力降进一步增加，然后开始将流体从第一输送通道旁通至 溢出口，随着压降的增加，数量逐渐增加。 对于阀构件的给定移动，第二输送通道和溢出口之间的有效交流面积的增加大于第一输送通道和溢出口之间的有效交流面积的增加。

公开(公告)号：US4679995A

公开(公告)日：1987-07-14

申请号：US751974

申请日：1985-07-05

Applicant: Ian T. Bristow

Inventor： Ian T. Bristow

IPC: F04C2/30 ,  F04C2/344 ,  F04C14/22 ,  F04C15/04

CPC classification number: F04C14/226

Abstract: A variable-capacity roller- or vane-type pump has a cam ring which is movable to vary the delivery of the pump and means is provided for applying to the movement of the cam ring a damping force which varies in dependence upon the instantaneous position of the cam ring.

Abstract translation: 可变容积的辊式或叶片型泵具有凸轮环，其可移动以改变泵的输送，并且提供装置用于向凸轮环的运动施加阻尼力，所述阻尼力根据瞬时位置而变化 凸轮环。

公开(公告)号：US4426196A

公开(公告)日：1984-01-17

申请号：US302520

申请日：1981-09-16

Applicant: Ian T. Bristow ,  Peter A. E. Wilson

Inventor： Ian T. Bristow ,  Peter A. E. Wilson

IPC: F01M1/16 ,  F01M5/00 ,  F04B49/22 ,  F04B49/08 ,  F04B49/10

CPC classification number: F01M5/00 ,  F01M1/16 ,  F04B49/225 ,  F04B2205/11

Abstract: A pumped oil supply system, for example for lubricating an internal combustion engine incorporates a relief valve the control element of which has superimposed thereon an opening force derived from a temperature responsive element responsive to the temperature of the oil delivered by the pump part of the system. The pump part has separate first and second outlets, the second outlet communicating with the oil gallery of the engine and the first outlet communicating with the second outlet through a variable restrictor. The first outlet has a relief valve with a spring-loaded piston acted on by the delivery pressure in the first outlet, and the piston is connected to a center body constituting the adjustable member of the variable restrictor. The temperature responsive element is disposed in the second outlet and imposes a resilient force on the piston which, with increase of the oil temperature, augments the action thereon of the delivery pressure in the first outlet. Oil passing through the relief valve flows to the inlet side of the pump part.

Abstract translation: 例如用于润滑内燃机的泵送油供应系统包括安全阀，其安全控制元件叠加有来自温度响应元件的打开力，该释放阀响应于由系统的泵部分输送的油的温度 。 泵部分具有单独的第一和第二出口，第二出口与发动机的油库连通，第一出口通过可变节流器与第二出口连通。 第一出口具有安全阀，其具有由第一出口中的输送压力作用的弹簧加载的活塞，并且活塞连接到构成可变节流器的可调节构件的中心体。 温度响应元件设置在第二出口中并且在活塞上施加弹性力，随着油温度的增加，其增加了第一出口中的输送压力的作用。 通过安全阀的油流入泵部的入口侧。

公开(公告)号：US4391569A

公开(公告)日：1983-07-05

申请号：US101791

申请日：1979-12-10

Applicant: Ian T. Bristow ,  Alec Thornelow

Inventor： Ian T. Bristow ,  Alec Thornelow

IPC: F16K17/30 ,  F04B47/00 ,  F04B49/00 ,  F04B53/10 ,  F04C14/02

CPC classification number: F04C14/02

Abstract: To minimize the power absorbed by a positive displacement pump system used where the requirement for pressure fluid varies inversely with the pump speed, notably in automobiles, the system provides two separate delivery passages 61, 62 for the pumped fluid and a discharge passage 66 into which the fluid from the delivery passage is passed under the control of a valve means 70, 71, the valve means commencing to operate on one (62) of the two delivered flows at lower speeds to by-pass a proportion of said one flow to an overspill 79, while the fluid not bypassed is added to the flow from the other delivery passage being passed to the discharge passage. The said proportion is increased in a manner to maintain the pressure drop across a discharge orifice in the discharge passage 66 at a constant value, and as the pump speed increases further the valve means commences to by-pass also an increasing proportion of the flow from said other delivery passage 61 to the overspill to maintain the said pressure drop constant. The increase in area of communication between the second delivery passage and overspill is greater than the increase in area of communication between the first delivery passage and overspill. In this way, the final regulation is carried out on a smaller quantity of fluid and less fluid is pumped to the highest pressure in the system.

Abstract translation: 为了将由压力流体的要求与泵的速度成反比变化的正排量泵系统所吸收的功率最小化，特别是在汽车中，该系统为泵送的流体提供两个分离的输送通道61,62和排出通道66 来自输送通道的流体在阀装置70,71的控制下通过，阀装置开始以较低速度在两个输送流中的一个（62）上操作，以将所述一个流的一部分旁通至 溢流79，而不绕过的流体被添加到从另一个输送通道流入排放通道的流中。 所述比例以使得排出通道66中的排出孔处的压力降保持恒定的方式增加，并且随着泵速度的进一步增加，阀装置也开始逐渐增加比例的流量 所述另一个输送通道61到达溢流口，以保持所述压降恒定。 第二传送通道与溢出部之间的通信面积的增加大于第一传送通道和溢出部件之间的通信面积的增加。 以这种方式，最终调节是在较少量的流体上进行的，较少的流体被泵送到系统中的最高压力。

公开(公告)号：US4673341A

公开(公告)日：1987-06-16

申请号：US751975

申请日：1985-07-05

Applicant: Ian T. Bristow

Inventor： Ian T. Bristow

IPC: F03C2/30 ,  F01C21/10 ,  F03C1/30 ,  F04C2/30 ,  F04C2/344 ,  F04C14/22 ,  F04C15/04

CPC classification number: F04C14/226 ,  F01C21/106

Abstract: A roller or vane type pump is described of the kind in which the cam ring is pivotally mounted within an external casing to vary the throw of the cam ring and hence the pump delivery means is provided whereby a constant flow is obtained regardless of the pump speed. The cam surface of the cam ring is not wholly circular. The two portions of the cam surface extending between the inlet and outlet ports of the pump at opposite sides respectively of the pump axis have curvatures such that the instantaneous distance R.sub.2 of the point of contact of one of the sealing rollers or vanes with the cam surface from the axis of rotation of the rotor is given by R.sub.2 =.sqroot.R.sub.1.sup.2 +k where k is a constant and R.sub.1 is a corresponding instantaneous distance of the point of contact of the other sealing roller or vane with the cam surface from said axis.

Abstract translation: 描述了一种滚子或叶片式泵，其中凸轮环枢转地安装在外部壳体内以改变凸轮环的投掷的类型，因此提供泵输送装置，由此获得恒定的流量，而与泵的速度无关 。 凸轮环的凸轮表面不是完全圆形的。 在泵轴的相对侧在泵的入口和出口之间延伸的凸轮表面的两个部分具有曲率，使得其中一个密封辊或叶片与凸轮表面的接触点的瞬时距离R2 从转子的旋转轴线由R2 = 2ROOT R12 + k给出，其中k是常数，R1是另一个密封辊或叶片与凸轮表面与所述轴线的接触点的对应的瞬时距离。

公开(公告)号：US4659296A

公开(公告)日：1987-04-21

申请号：US793096

申请日：1985-10-30

Applicant: Ian T. Bristow

Inventor： Ian T. Bristow

IPC: F01C21/10 ,  F04C2/344 ,  F04C15/06 ,  F01C1/344

CPC classification number: F04C15/06 ,  F01C21/106 ,  F04C2/3447

Abstract: The cam surface of a roller-type positive displacement pump providing an inlet port and two outlet ports has on circumferentially opposite sides of at least one of the outlet ports a profile such that the difference between the squares of the radii at the instantaneous points of contact therewith of the two rollers which serve to seal the port at said opposite sides is a constant. The portions of the cam surface at oposite sides of such an outlet port have radii relative to the axis of rotation of the rotor which decrease progressively in the direction of rotation of the rotor.

Abstract translation: 提供入口端口和两个出口端口的辊式正排量泵的凸轮表面在至少一个出口端口的周向相对侧上具有轮廓，使得在瞬时接触点处的半径的平方之间的差异 因此用于在所述相对侧密封端口的两个辊是一个常数。 在这种出口端口的相对侧的凸轮表面的部分相对于转子的旋转轴线具有半径，其在转子的旋转方向上逐渐减小。

公开(公告)号：US4360322A

公开(公告)日：1982-11-23

申请号：US101788

申请日：1979-12-10

Applicant: Ian T. Bristow ,  Nigel J. Petts

Inventor： Ian T. Bristow ,  Nigel J. Petts

IPC: F04B49/00 ,  F04C14/02 ,  F04C14/26

CPC classification number: F04C14/26 ,  F04C14/02

Abstract: A positive displacement pump system has two delivery passages communicating under the control of a valve with a main discharge passage and/or an overspill duct. The valve is constituted by a valve member slidably mounted in a valve bore and the valve member has lands and intermediate recesses controlling communication between the delivery passages and the overspill duct. The pressures upstream and downstream of a discharge orifice in the discharge passage are applied to the valve member in opposition to each other, increase of the pressure drop tending to move the valve member to increase the amount of fluid passed to the overspill duct. To overcome the known tendency for a valve member to be subjected by the hydraulic forces to a large closing force when the valve is open to only a small extent, the valve is designed to provide for a relatively large opening force at least when the valve is commencing to open. In one construction this is achieved by passing the flow from the second to the main discharge duct through the valve member in a manner producing a jet reaction on the valve member to assist the normal regulating force on the member. In alternative arrangements the additional force is derived from an additional pressure drop induced in the flow from the delivery passage, the higher pressure being applied to valve member in a sense to increase the amount of fluid passed to overspill.

Abstract translation: 正排量泵系统具有在阀门与主排放通道和/或溢流管道连通的两个输送通道。 阀由可滑动地安装在阀孔中的阀构件构成，并且阀构件具有用于控制输送通道和溢流管之间的连通的平台和中间凹槽。 排出通道中的排放孔的上游和下游的压力彼此相对地施加到阀构件上，倾向于使阀构件移动以增加流过溢流管的流体的量的增加。 为了克服当阀门仅在很小的程度上打开时，液压力受到液压作用而产生大的闭合力的已知趋势，阀被设计成至少在阀门为止时提供相当大的开启力 开始开放 在一种结构中，这是通过以下方式实现的：通过在阀构件上产生喷射反应的方式，通过阀构件将流动从第二流到主排放管通过，以帮助构件上的正常调节力。 在替代布置中，额外的力源自在来自输送通道的流动中引起的附加压降，在一定程度上施加较高的压力以增加流过溢流的流体的量。

公开(公告)号：US4298315A

公开(公告)日：1981-11-03

申请号：US101789

申请日：1979-12-10

Applicant: Ian T. Bristow ,  Nigel J. Petts

Inventor： Ian T. Bristow ,  Nigel J. Petts

IPC: F16K17/30 ,  F04B20060101 ,  F04B1/08 ,  F04B49/00 ,  F04B49/02 ,  F04B53/10 ,  F04C14/26

CPC classification number: F04C14/26

Abstract: A positive displacement pump system provides first and second delivery 11, 12 passages of which the first passage 11 communicates with a main discharge passage 15 containing a discharge orifice 17. The second delivery passage 12 opens to a valve bore and is in permanently open communication with the first delivery passage through an axial passage 29 in a valve member 20 slidably mounted in the valve bore. Lifting of the valve member with increasing pressure drop across the orifice 17 places the first delivery passage in communication with an overspill port 14. The pressure at the upstream and downstream sides of the orifice are applied against the lower end and the upper end 28 of the valve member so that the valve operates to maintain the pressure difference constant. The pressure difference between passage 29 and that applied against the upper end 28 of the valve member is therefore also substantially constant, so that leakage from passage 29 past the upper end 28 is constant. A variable effect does not have to be allowed for, therefore, and manufacturing tolerances can be widened.

Abstract translation: 正排量泵系统提供第一和第二输送11,12通道，第一通道11和第一通道11与包含排放孔17的主排放通道15连通。第二输送通道12通向阀孔并与 通过可滑动地安装在阀孔中的阀构件20中的轴向通道29的第一输送通道。 通过孔口17上的增加的压降提升阀构件，使第一输送通道与溢出口14连通。孔口的上游侧和下游侧的压力抵靠着孔的下端和上端28 阀构件，使得阀操作以保持压力差恒定。 因此，通道29与施加在阀构件的上端28之间的压力差基本上是恒定的，从而使通道29从上端28泄漏的是恒定的。 因此，不必允许可变效果，因此可以扩大制造公差。