摘要:
The invention relates to a fluid product dispensing pump cylinder which is intended to be assembled to a fluid product tank. According to the invention, the pump cylinder is made from a thermoplastic alloy comprising a mixture of homopolymer polypropylene and high-density polyethylene.
摘要:
The present specification discloses a compressor characterized in that a nonpolar solvent is used as a working fluid and an insulation part of a rotating section is formed from a low dielectric constant plastic film having a specific dielectric constant of 1.2 to 3.0. This compressor has been reduced in leakage current and improved in safety and reliability, and therefore can realize energy savings for devices such as a refrigerant system device.
摘要:
The present invention provides an improved design for a mechanical pump. The pump is a dual chamber design typically including a pair of expandable bellows driven in a reciprocating fashion by a supply of pressurized air. The use of expandable bellows reduces wear on the pump thereby lengthening the required maintenance intervals in comparison with dual chamber diaphragm pumps previously known. Additionally, the pump is easily disassembled for inspection, cleaning or maintenance. Furthermore, the high strength of the pump's design makes it possible to manufacture the pump entirely of corrosion resistant materials.
摘要:
Liquid-ring gas pump with a working chamber in which an impeller (6) rotates and which is bounded axially by a control plate (7) past which the impeller (6) moves with a small clearance and which has at least one intake and/or discharge opening (21, 22, 23) and is composed of rolled sheet. According to the invention, the edges (26) of the intake and discharge openings are at least in part bent over towards the side facing away from the impeller (6) and are rounded on the side facing the impeller and raised on the side facing away from it.
摘要:
A variable capacity vane compressor includes a bearing arrangement having a radial bearing radially supporting a drive shaft of the compressor, and a thrust bearing rotatably supporting a capacity control element. The bearing arrangement comprises an annular member fixed in a through hole formed through a side block of the compressor, through which the drive shaft extends. The annular member has an inner peripheral surface in which the radial and thrust bearings are received. The annular member is formed of a material having a coefficient of thermal expansion substantially equal to that of a material forming the radial bearing. The thrust bearing has a first race disposed on a side thereof close to a rotor of the compressor, and a second race disposed on a side remote from the rotor. The first race is force-fitted in a through hole formed through the capacity control element and slidably fitted in the inner peripheral surface of the annular member. The first and second races have respective inner peripheral surfaces thereof spaced from an outer peripheral surface of the drive shaft.
摘要:
A high-pressure water pump of the reciprocating piston type has its metal ston reciprocatable in a cylinder bushing composed of PEEK base high-strength thermoplastic synthetic resin and constructed so as to define a cooling clearance between the piston and the cylinder designed to prevent the temperature of the bushing on continuous operation from rising above 100.degree. C. The piston shoe and the slide bearing for the eccentric shaft should also be a PEEK based resin which can have a filler of carbon fibers, PTFE, glass fibers and/or mineral.
摘要:
A diaphragm, suitable for use in automotive applications, which comprises a base fabric having bonded to at least one surface a fluororubber layer by an adhesive which includes an acrylonitrile-butadiene or acrylonitrile-isoprene rubber having an amino group. There is also a described a method of making the diaphragm.
摘要:
The compressor comprises at least one high-pressure cylinder and piston unit having a piston which is guided in a cylinder liner and which is coupled with a crankshaft by way of a connecting element guided in the cylinder casing along the longitudinal axis of the cylinder. The piston is coupled with the connecting element by way of a mounting permitting movements of the connecting element relatively to the piston transversely of the longitudinal axis. Guidance of the piston is achieved without affect from oscillations of the connecting. The piston cooperates with the liner to bound a lubricant-free annular gap open over the whole longitudinal portion common to the liner and the piston. A dry gap ring seal can therefore be provided between the piston and the liner and ensures that the compression chamber remains seal tight even at pressures of above 60 bar. Preferably, the piston and the cylinder liner are each made of wear-resistant metal or ceramic material.
摘要:
A high pressure, positive displacement piston pump for pumping a corrosive fluid is disclosed. The pump includes a pump body having a plurality of cylinders therein, each provided with an inlet and an outlet. A suitable one-way valve device is disposed in a connection between the inlet and the cylinder, and another oppositely directed one way-valve device is disposed in a connection betweenn the outlet and each cylinder. A piston is disposed in each cylinder for reciprocal movement therein in order to pump the fluuid from the inlet to the outlet. A cam device moves each piston reciprocally and includes a rotating member having a first camming surface which is cylically rotated adjacent an end of each piston. At the end of each piston, a second camming surface is provided which engages the first camming surface. A cooling system is also provided for cooling and lubricating the first and second camming surfaces with a coolant liquid in contact with the bearing surfaces within the pump. The coolant liquid can be and in the preferred embodiment is the corrosive liquid being pumped. A shaft is preferably used for rotating the rotating member and a suitable journaling device is provided for the shaft. The shaft is also non-corrodible, and the coolant liquid also cools and lubricates the journaling device as well as the shaft.
摘要:
A durable low weight compressor having improved performance is disclosed. The compressor includes a fiber reinforced resin matrix composite housing and a fiber reinforced glass marix composite compression chamber liner. An air conditioner including an improved compressor is also disclosed.