Abstract:
In order to enable using water as a hydraulic liquid in a high-pressure piston pump for hydraulic circuits with nominal pressure more than 50 bar and up to at least 250 bar, on the one hand an area on the internal wall (10) of a cylindrical operating chamber (1), which cooperates with the external surface (20) of a piston (2) and is at least temporarily in contact therewith, consists of polyether-ether-ketone (PEEK), and on the other hand at least an area of the external surface (20) of said piston (20), which cooperates with said internal surface (10) of the operating chamber (1), consists of martensitic stainless steel. An eccentric (22) of a crank (21), which generates oscillating movement of the piston (2) along said cylindrical operating chamber (1), is offset relative to the longitudinal axis (100) of said operating chamber (1) at a predetermined distance (e) transversally with respect to said longitudinal axis (100), by which the crank (2) is at least during the most critical stage of the piston (2) stroke positioned at least approximately on said central axis (100) of the operating chamber (1).
Abstract:
The invention provides a piston head (10) having a bowl (20) in the crown (18) thereof. At least the upper edge of the bowl (20), and preferably the whole crown (18) is made of a material resistant to thermal oxidation, such as stainless steel. The remainder of the piston head (10) is made of conventional hot forging material.
Abstract:
A liquid pump (10) adapted for pumping liquids containing high percentages of solids in suspension, including a foot valve (22) and pumping chamber, and having an insert (32) in the pumping chamber adjacent the foot valve seat, the insert having a resilient inner surface (40) and an outer metallic rim (34), the inner resilient surface forming flanges about the edges of the rim, and the insert being clamped between the valve seat and another member.
Abstract:
Conventional direct injection internal combustion engines will not completely ignite and burn relatively lower-cetane-number fuels such as 100 percent methanol or ethanol because the fuel spray injection pattern usually cannot carry or propagate a flame to all the injected fuel which is typically made up of individual fuel streams which are separated by pockets of fuel-deficient intake air. The present fuel combustion system (10) includes a fuel ignition-initiating device (26) such as a glow plug (70) and apparatus (98, 102) for interconnectedly contacting and continuously bridging all of the individual fuel streams (66) with an auxiliary cloud (94) of well-atomized fuel. In this manner, a flame initiated by the fuel ignition-initiating device (26) is rapidly and completely propagated via the auxiliary cloud (94) of fuel to all the individual fuel streams (66).
Abstract:
냉매 누설을 개선하여 압축기의 성능 향상을 도모하는 것과 내구성을 개선하여 신뢰성의 향상을 도모하면서, 고 효율적인 압축기를 제공하는 것을 목적으로 하는 것이며, 압축기의 내부에 압축 공간이 구성되는 실린더로 구성된 압축 요소와, 실린더 내의 압축 공간에 연통하는 흡입 포트 및 토출 포트와, 실린더의 개구를 폐색하는 지지 부재와, 지지 부재에 형성된 베어링으로서의 주 베어링에 지지가 되어 회전하는 회전축과, 회전축의 축 방향으로 교차하는 일면이 상사점과 하사점 사이에서 연속하여 경사지는 동시에, 실린더 내에 배치되어 회전축에 의해 회전 구동되어, 흡입 포트로부터 빨아 들여진 유체를 압축하여 토출 포트로부터 토출하는 압축 부재와, 흡입 포트와 토출 포트 사이에 배치되어 압축 부재의 일면에 접촉하여 실린더 내의 압축 공간을 저압실과 고압실로 구획하는 베인과, 압축 부재와는 반대측의 베어링(주 베어링) 단부에 설치되어, 회전축에 접촉하는 축 밀봉 시일을 구비한 것을 요지로 한다. 압축기, 실린더, 압축 요소, 흡입 포트, 토출 포트, 지지 부재, 베어링, 압축 부재, 베인
Abstract:
There is provided a cylinder injection type internal combustion engine capable of performing stratified charge operation at the time of a vehicle speed of 120 km/h and/or an engine rotational speed of 3200 rpm to enhance the fuel efficiency and/or to observe the emission regulations. In the internal combustion engine, a stratum of air and/or air flow is formed between a fuel spray injected from an injection valve and the top face of a piston and/or the wall surface of a combustion chamber, and a face shape contrived to guide the air flow is formed on the top face of the piston. Also, the stratified charge operation can be performed even at the time of cold start or cranking.
Abstract:
A canned motor for use in a pump has an outer frame casing fitted over a stator, a pair of side frame members welded to respective open ends of the outer frame casing, a can fitted in the stator and joined to the side frame members, and an outer cylinder disposed around the outer frame casing with an annular spaced defined therebetween, the outer cylinder being welded to the outer frame casing. The outer cylinder has a pair of flanges disposed respectively on axially spaced open ends thereof for attachment to components of a pump assembly and holding a fluid being handled within the outer cylinder. The outer cylinder has a hole defined in an outer circumferential wall thereof for passing leads for connection to a power supply.
Abstract:
An internal combustion engine (10) comprising an engine frame (12) having a drive shaft (20) rotatably mounted therein and extending outwardly therefrom. A pair of cylinder sleeves (40, 40') are mounted on the engine frame (12) and have their inner ends positioned within the interior of the frame and their outer ends positioned outwardly thereof. A cylinder head (60, 60') is secured to the outer end of each of the sleeves and is separated thereby by means of a heat insulative gasket (70). Each of the cylinder heads (60, 60') has a dome-shaped chamber (62, 62') formed therein which is in communication with a source of combustible fuel. An air inlet conduit (94) is mounted on one end of the engine frame and is in communication with a source of air under pressure such as a blower, super-charger or the like. The air inlet conduit is in communication with an air passageway (100) formed in the engine frame (16) which is in communication with air inlet openings (52, 52') formed in the cylinder sleeves (40, 40'). The cylinder sleeves (40, 40') are provided with exhaust openings (54, 54') formed therein which communicate with an air exhaust passageway (102) formed in the engine frame (16). The exhaust passageway (102) is connected to exhaust conduit (106) or pipe extending from the engine frame (16). A piston (72, 72') is slidably mounted in each of the sleeves (40, 40') and has a dome-shaped head portion (76, 76') which is adapted to be received by the dome-shaped chamber (62, 62') in the cylinder head (60, 60') when the piston is in its top position. In the top position, the small "air space" (118) is present between the walls or sides (78, 78') of the piston head (76, 76') and the walls or sides of the sleeves (64, 64'). The "air space" (118) serves as a means for retarding the absorption of heat into the sides of the piston head (76, 76') and the sides of the cylinder sleeve (40, 40'). In the down position, the "air space" (118) also serves to spread the cooling air into a thin, wide sheet for more efficient cooling of the cylinder head (60, 60') and sleeves (40, 40'). Optional air deflecting fins (84, 86, 84', 86') may be employed on the piston head (76, 76'). The rings (82, 82') of the piston (72, 72') are conventionally lubricated and slide upon the interior wall (52, 52') of the cylinder sleeve (40, 40'). Each of the pistons (72, 72') has a roller (88, 88') mounted on the skin portion (74, 74') thereof which rolls upon a cam (32) mounted on a rotor plate (30) which is secured to the drive shaft (20) for rotation therewith. A return roller (92, 92') is also operatively mounted on the skin portion (74, 74') of the piston (72, 72') for engagement with a return cam (36) which is mounted on the drive shaft (30) for rotation therewith.