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1. WO2020110427 - CONTROL VALVE FOR VARIABLE DISPLACEMENT COMPRESSOR

Publication Number WO/2020/110427
Publication Date 04.06.2020
International Application No. PCT/JP2019/036058
International Filing Date 13.09.2019
IPC
F04B 27/18 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
27Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
08having cylinders coaxial with, or parallel or inclined to, main shaft axis
14Control
16of pumps with stationary cylinders
18by varying the relative positions of a swash plate and a cylinder block
CPC
F04B 27/12
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
27Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
08having cylinders coaxial with, or parallel or inclined to, main shaft axis
10having stationary cylinders
12having plural sets of cylinders or pistons
F04B 27/18
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
27Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
08having cylinders coaxial with, or parallel or inclined to, main shaft axis
14Control
16of pumps with stationary cylinders
18by varying the relative positions of a swash plate and a cylinder block
F16K 27/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
27Construction of housing
F16K 27/02
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
27Construction of housing
02of lift valves
Applicants
  • 株式会社不二工機 FUJIKOKI CORPORATION [JP]/[JP]
Inventors
  • 田野 慎太郎 TANO Shintaro
  • 浅野 恒 ASANO Hisashi
  • 伊東 雅晴 ITOH Masaharu
  • 坂本 駿 SAKAMOTO Takashi
Agents
  • 特許業務法人平木国際特許事務所 HIRAKI & ASSOCIATES
Priority Data
2018-22188628.11.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) CONTROL VALVE FOR VARIABLE DISPLACEMENT COMPRESSOR
(FR) SOUPAPE DE COMMANDE POUR COMPRESSEUR À CYLINDRÉE VARIABLE
(JA) 可変容量型圧縮機用制御弁
Abstract
(EN)
Provided is a control valve for a variable displacement compressor that minimizes Pd-Ps leaking and valve body tilting and that is capable of preventing foreign matter from accumulating in a gap between sliding surfaces that is formed between a main valve body and a guide hole, and as a result, is capable of making it less likely for operation failures such as valve locking or the main valve body leaving its position to occur without causing any decrease in controllability or operation stability. A part of main valve body 10 that slides relative to a guide hole 19 is provided with, in sequence from a Pd guide-in port 26 side to a Ps inlet/outlet 27 side, a high-pressure-side large-diameter part 10f having a diameter Da, an intermediate annular groove part 10g having a diameter Db less than Da and a predetermined axial length, and a low-pressure-side large-diameter part 10h having a diameter Dc greater than Db. When at least the main valve body 10 closes up the guide hole 19, one or more longitudinal grooves 19g are formed, which serve as guide-hole-side grooves that allow communication between the Ps inlet/outlet 27 side and a sliding surface gap (intermediate large clearance β portion) formed between the intermediate annular groove part 10g in the main valve body 10 and the inner wall surface of the guide hole 19.
(FR)
La présente invention concerne une soupape de commande pour un compresseur à cylindrée variable qui minimalise toute fuite côté Pd-Ps et toute inclinaison du corps de soupape et qui est en mesure d'empêcher toute matière étrangère de s'accumuler dans un espace entre des surfaces coulissantes, espace qui est formé entre un corps de soupape principal et un trou de guidage, et, par conséquent, qui est en mesure de rendre moins probable la survenue de défaillances de fonctionnement, telles que le blocage de soupape ou le déplacement du corps de soupape principal par rapport à sa position, sans donner lieu à une réduction de la contrôlabilité ou de la stabilité de fonctionnement. Une partie du corps de soupape principal 10 qui coulisse par rapport à un trou de guidage 19 comporte, en séquence depuis un côté orifice d'entrée de guidage Pd 26 jusqu'à un côté entrée/sortie Ps 27, une partie de grand diamètre côté haute pression 10f ayant un diamètre Da, une partie de rainure annulaire intermédiaire 10g ayant un diamètre Db inférieur à Da et une longueur axiale prédéterminée, et une partie de grand diamètre côté basse pression 10h ayant un diamètre Dc supérieur à Db. Quand au moins le corps de soupape principal 10 ferme le trou de guidage 19, une ou plusieurs rainures longitudinales 19g sont formées, qui servent de rainures côté trou de guidage qui permettent la communication entre le côté entrée/sortie Ps 27 et un espace de surface coulissante (partie β de jeu important intermédiaire) formé entre la partie de rainure annulaire intermédiaire 10g dans le corps de soupape principal 10 et la surface de paroi intérieure du trou de guidage 19.
(JA)
Pd-Ps漏れ及び弁体の傾きを抑えた上で、主弁体と案内孔との間に形成される摺動面間隙に異物が溜まらないようにでき、もって、制御性、動作安定性の低下を招くことなく、弁ロック、弁体置き去り等の作動不良を生じ難くできる可変容量型圧縮機用制御弁を提供する。主弁体10における案内孔19に対する摺動部は、Pd導入口26側からPs入出口27側にかけて順次、直径がDaの高圧側大径部10f、直径が前記Daより小さいDbで所定の軸線方向長さを有する中間環状溝部10g、及び直径が前記Dbより大きいDcの低圧側大径部10hが設けられるとともに、案内孔19に、少なくとも主弁体10が閉弁しているときに、主弁体10における中間環状溝部10gと案内孔19の内壁面との間に形成される摺動面間隙(中間大クリアランスβ部分)とPs入出口27側とを連通させ得る1個又は複数個の案内孔側溝としての縦溝19gが形成されている。
Also published as
Latest bibliographic data on file with the International Bureau