摘要:
Cooling system for reciprocating compressors comprising an atomizing nozzle (1) that supplies an atomized lubricating fluid inside the compressor cylinder (2), a heat exchanger (6) intended for cooling the lubricating fluid to be atomized at the nozzle (1), a fluid separator (5) for separating a mixture of cooling fluid and lubricating fluid and directing the lubricating fluid back from the system, and a blocking element (7) arranged between the atomizing nozzle (1) and the heat exchanger (6) to prevent the buildup of lubricating fluid in the cylinder. Reciprocating compressor having the cooling system as described.
摘要:
The present invention relates to a process for the synthesis of nanostructured metallic hollow spherical particles, in which the metal is deposited onto sacrificial masks formed in a polymeric colloidal solution by the electroless autocatalytic deposition method (deposition by the present process releases only gaseous products (N 2 and H 2 )) during the oxidation thereof, which evolve without leaving contaminants in the deposit)). The particulate material composed by nanostructured metallic hollow spherical particles with average diameter ranging from 100 nm to 5 µm and low density with respect to the massic metal, and a process for compacting and sintering a green test specimen formed by the respective particulate material are also described. 1
摘要:
The process for increasing the adhesion of a reinforcing inorganic material in an organic matrix comprises: subjecting a dry load of particulate or fibrous reinforcing inorganic material presenting hydroxyls in its surface, to a first surface treatment with a coupling agent of the siloxane type containing amine groups, dissolved in an organic solvent free of water and with an acid pH and, after a curing step, to a new surface treatment with at least one coupling agent of the siloxane type dissolved in a solution containing an organic solvent and water, to be subjected to a new curing step. The reinforcement material thus treated may then be mixed to a load of organic material defined by a polymer or by a monomer, in order to obtain a composite mixture to form a composite polymeric material which may present the desired final form or a raw form, to be ground or pelletized into a particulate form for posterior processing.
摘要:
The plasma reactor comprises a reaction chamber (23) connectable to a source of ionizable gases (25) and to a heating device (80), said reactor (10) being subjected to the phases of heating (A), cleaning (L) and/or surface treatment (S), cooling (R), unloading (D) and loading (C) of metallic pieces (1). The installation comprises: at least two reactors (10), each being selectively and alternately connected to: the same source of ionizable gases (25); the same vacuum source (60); the same electrical energy source (50); and to the same heating device (80), the latter being displaceable between operative positions, in each of which surrounding laterally and superiorly a respective reactor (10), while the latter is in its heating phase (A) and cleaning phase (L) and/or in the surface treatment phase (S) of the metallic pieces (1).
摘要:
The refrigeration system comprises: a compressor (10); a condenser (30) connected to a first inlet (51) of a separating means (50) which has: a vapor outlet (53) connected to the compressor (10) and a liquid outlet (54) connected to an evaporator (90); a selecting valve (100) having: a first vapor inlet (101) connected to the evaporator (90); a second vapor inlet (102) connected to the separating means (50); and a vapor outlet (103) connected to the compressor (10), said selecting valve (100) being operated to selectively and alternatively communicate its first and second vapor inlets (101, 102) with its vapor outlet (103), so as to allow the compressor (10) to draw vapor from the separating means (50) and from the evaporator (90); and a control unit (110) for controlling the operation of the selecting valve (100).
摘要:
The refrigeration system comprises: a compressor (10); a condenser (30) connected to a first inlet (51) of a separating means (50) which has: a vapor outlet (53) connected to the compressor (10) and a liquid outlet (54) connected to an evaporator (90); a selecting valve (100) having: a first vapor inlet (101) connected to the evaporator (90); a second vapor inlet (102) connected to the separating means (50); and a vapor outlet (103) connected to the compressor (10), said selecting valve (100) being operated to selectively and alternatively communicate its first and second vapor inlets (101, 102) with its vapor outlet (103), so as to allow the compressor (10) to draw vapor from the separating means (50) and from the evaporator (90); and a control unit (110) for controlling the operation of the selecting valve (100).
摘要:
The present invention refers to compositions based on clays, oils and/or plant extracts with photoprotective and/or antioxidant activity and inorganic sunscreens; formulations including photoprotective compositions; methods of preparation and their uses. Problem to be solved : provide hybrid compositions between organic and inorganic photoprotective ingredients, which do not require the use of nanoparticle or synthetic chemical sunscreens, which provide adjustable degrees of SPF and FPUVA and that allow obtaining photoprotective formulations in different pharmaceutical or cosmetic forms. Problem resolution : Photoprotective compositions containing at least one clay, at least one oil and/or plant extract with photoprotective and/or antioxidant activity, and at least one inorganic sunscreen are revealed; being said clay is present in the composition in a concentration of 0.1 to 85% by weight; being said oil and/or plant extract is present in the composition at a concentration of 0.2 to 80%, by weight; and being said inorganic sunscreen is present in the composition at a concentration of 0.5 to 75%, by weight. Still, a photoprotective formulation is revealed - as well as its method of preparation - including said photoprotective composition.