JP5931502B2

JP5931502B2 - Reciprocating compressor

Info

Publication number: JP5931502B2
Application number: JP2012039367A
Authority: JP
Inventors: 大資鳥越; 信裕唐澤; 一明内山
Original assignee: 株式会社協電社
Priority date: 2012-02-24
Filing date: 2012-02-24
Publication date: 2016-06-08
Anticipated expiration: 2032-02-24
Also published as: JP2013174188A

Description

本発明は往復動型圧縮装置に関し、さらに詳しくは、圧縮機のピストン運動に伴う吐出ガスの脈動の抑制、静音化等のための空気槽（エアータンク）を備えた往復動型圧縮装置に関する。 The present invention relates to a reciprocating compression device, and more particularly to a reciprocating compression device including an air tank (air tank) for suppressing pulsation of discharged gas accompanying the piston motion of a compressor, and for reducing noise.

往復動型圧縮装置は、モータと、このモータによって駆動されるクランク機構によってピストン運動を行う気筒を備えた圧縮機とから構成されている。各気筒においてピストンの往復運動に連動して吸入バルブと吐出バルブが交互に開閉して、ガスの吸入動作、圧縮動作および圧縮ガスの吐出動作が繰り返される。ロボット制御等に用いられるエアー駆動式のアクチュエータに対して一定圧力の駆動用の圧縮空気を供給する場合等においては、往復動型圧縮装置から吐出される圧縮空気の脈動を抑制し、また、振動および騒音を抑制するために、空気槽あるいはエアータンクを介して、駆動用の圧縮空気を供給している。例えば、特許文献１には、脈動防止のためにエアータンクを底部側に取り付けた構成のエアポンプが開示されている。 The reciprocating compression apparatus includes a motor and a compressor including a cylinder that performs piston motion by a crank mechanism driven by the motor. In each cylinder, the suction valve and the discharge valve are alternately opened and closed in conjunction with the reciprocating motion of the piston, and the gas suction operation, the compression operation, and the compressed gas discharge operation are repeated. When supplying compressed air for driving at a constant pressure to an air-driven actuator used for robot control, etc., pulsation of compressed air discharged from a reciprocating compressor is suppressed, and vibration is also suppressed. In order to suppress noise, driving compressed air is supplied through an air tank or an air tank. For example, Patent Document 1 discloses an air pump having a configuration in which an air tank is attached to the bottom side to prevent pulsation.

特開２０１０−１７４７９８号公報JP 2010-174798 A

ここで、近年においては、ロボット制御等のアクチュエータに用いる使い勝手の良い小型のエアーコンプレッサが望まれている。このようなエアーコンプレッサには、機器に組み込み易いこと、持ち運びに適するように小型で軽量であること、動作音が静かであること、耐久性に優れていること、吐出圧力が例えば０．６ＭＰａ程度の圧力一定制御ができること、制御エアーのオンオフによって圧力が変動しないこと等が要求される。 In recent years, there has been a demand for a compact and easy-to-use air compressor for use in actuators for robot control and the like. Such an air compressor is easy to incorporate into equipment, is small and lightweight so as to be portable, has a quiet operation sound, has excellent durability, and has a discharge pressure of about 0.6 MPa, for example. It is required that constant pressure control can be performed, and that the pressure does not fluctuate due to on / off of control air.

しかしながら、従来においては、吐出する圧縮空気の脈動を防止して圧力一定制御、騒音抑制などを図るために圧縮機に空気槽を設けると、装置構成が大型化し、機器への組み込み性も低下し、また、持ち運びに適するような小型で軽量化を図ることが困難になる。 However, conventionally, if an air tank is provided in the compressor in order to prevent pulsation of the compressed air to be discharged to achieve constant pressure control, noise suppression, etc., the size of the apparatus increases and the ease of incorporation into equipment also decreases. In addition, it is difficult to achieve a small size and light weight suitable for carrying.

本発明の課題は、これらの点に鑑みて、寸法及び重量の増加を招くことなく、しかも、組み込み及び持ち運びを困難にすることなく空気槽が組み込まれた構成の往復動型圧縮装置を提案することにある。 In view of these points, an object of the present invention is to propose a reciprocating compression device having a configuration in which an air tank is incorporated without causing an increase in size and weight, and without making it difficult to incorporate and carry. There is.

上記の課題を解決するために、本発明の往復動型圧縮装置は、
モータと、前記モータの前端に同軸に取り付けた圧縮機と、前記モータの外周を取り囲む状態に配置した空気槽とを有し、
前記圧縮機は、筒状の圧縮機ケースと、この圧縮機ケースの外周面から所定の角度間隔で放射状に突出している複数の気筒部と、前記圧縮機ケースの前記外周面の外側において隣接する前記気筒部の間にそれぞれ配置した複数の集合継手管とを備えており、
前記集合継手管には、少なくとも、外部からガスを吸入するガス吸入口を備えた吸入集合継手管と、前記ガス吸入口から吸入された後に前記気筒部を経由して一段あるいは多段に圧縮されたガスを吐出する圧縮ガス吐出口を備えた吐出集合継手管とが含まれており、
前記吐出集合継手管が前記空気槽に連通していることを特徴としている。 In order to solve the above-described problem, a reciprocating compression device of the present invention includes:
A motor, a compressor coaxially attached to the front end of the motor, and an air tank arranged to surround the outer periphery of the motor,
The compressor is adjacent to a cylindrical compressor case, a plurality of cylinder portions protruding radially from the outer peripheral surface of the compressor case at predetermined angular intervals, and outside the outer peripheral surface of the compressor case. A plurality of collective joint pipes arranged between the cylinder parts,
The collective joint pipe includes at least a suction collective pipe provided with a gas suction port for sucking gas from the outside, and after being sucked from the gas suction port, compressed into one stage or multiple stages via the cylinder portion And a discharge joint pipe with a compressed gas discharge port for discharging gas,
The discharge assembly joint pipe communicates with the air tank.

本発明の往復動型圧縮装置では、モータの前端に同軸に往復動型の圧縮機を取り付け、圧縮の各気筒を放射状に所定の角度間隔で配置してある。これにより、圧縮機の外形寸法は、放射状に突出している各気筒部によって、全体としてモータの外形寸法よりも大きくなる。すなわち、モータの外周側に環状のデッドスペースができる。本発明では、このスペースを利用して空気槽が配置されている。また、各気筒部の間を連通するための連通路を、放射状に配置した気筒部の間に配置した集合継手管によって形成している。すなわち、圧縮機ケースから放射状に突出している気筒部の間のデッドスペースを利用して集合継手管が配置されている。 In the reciprocating compressor of the present invention, a reciprocating compressor is coaxially attached to the front end of the motor, and the compression cylinders are radially arranged at predetermined angular intervals. Thereby, the external dimension of a compressor becomes larger than the external dimension of a motor as a whole by each cylinder part which protrudes radially. That is, an annular dead space is formed on the outer peripheral side of the motor. In this invention, the air tank is arrange | positioned using this space. Moreover, the communication path for communicating between each cylinder part is formed of the collective joint pipe arrange | positioned between the cylinder parts arrange | positioned radially. That is, the collective joint pipe is arranged using a dead space between the cylinder portions protruding radially from the compressor case.

この結果、寸法の増加を招くことなく空気槽を組み込むことができ、また、各気筒部間の連通路を構造の複雑化、寸法の増加を招くことなく構成できる。よって、ロボット制御等のためのアクチュエータに用いるのに適した小型で軽量な往復動型圧縮装置を実現できる。 As a result, the air tank can be incorporated without increasing the size, and the communication path between the cylinder portions can be configured without complicating the structure and increasing the size. Therefore, a small and lightweight reciprocating compression device suitable for use in an actuator for robot control or the like can be realized.

（ａ）は本発明を適用した４気筒の往復動型圧縮装置の斜視図であり、（ｂ）はその平面図である。(A) is a perspective view of a 4-cylinder reciprocating compression device to which the present invention is applied, and (b) is a plan view thereof. 図１の往復動型圧縮装置を、主としてモータおよび圧縮機と空気槽とを上下に分離させた状態で示す分解斜視図である。It is a disassembled perspective view which shows the reciprocating compression apparatus of FIG. 1 in the state which mainly isolate | separated the motor, the compressor, and the air tank up and down. 図１のＡ−Ａ線で切断した部分を示す概略縦断面図である。It is a schematic longitudinal cross-sectional view which shows the part cut | disconnected by the AA line of FIG. 図１のＢ−Ｂ線で切断した部分を示す概略縦断面図である。It is a schematic longitudinal cross-sectional view which shows the part cut | disconnected by the BB line of FIG. 図１の往復動型圧縮装置の空気槽の部分を示す概略横断面図である。It is a schematic cross-sectional view which shows the part of the air tank of the reciprocating type compression apparatus of FIG.

以下に、図面を参照して本発明を適用した往復動型圧縮装置の実施の形態を説明する。 Embodiments of a reciprocating compression device to which the present invention is applied will be described below with reference to the drawings.

（全体構成）
図１および図２を参照して説明すると、本実施の形態に係る往復動型圧縮装置１は縦置き式の４気筒二段圧縮装置であり、垂直に配置されているモータ２の上端（前端）に４気筒の圧縮機３が同軸に取り付けられ、モータ２を取り囲む状態に円筒状の空気槽４が配置されている。空気槽４の下端にはベース枠５が取り付けられ、この下面に防振ゴムからなる複数の支持脚６が取り付けられている。 (overall structure)
Referring to FIGS. 1 and 2, the reciprocating compression device 1 according to the present embodiment is a vertical four-cylinder two-stage compression device, and has an upper end (front end) of a motor 2 arranged vertically. ), A four-cylinder compressor 3 is coaxially mounted, and a cylindrical air tank 4 is disposed so as to surround the motor 2. A base frame 5 is attached to the lower end of the air tank 4, and a plurality of support legs 6 made of vibration-proof rubber are attached to the lower surface of the air tank 4.

上側の圧縮機３には、装置中心軸線１ａを中心として、９０°の等角度間隔で、同一形状の４基の気筒部７（１）〜気筒部７（４）が水平方向に放射状に配置されている。これらの気筒部７（１）〜気筒部７（４）の間には、基本的に同一形状の４本の集合継手管８（１）〜８（４）が装置中心軸線１ａを中心として９０°の等角度間隔で配置されている。各集合継手管８（１）〜８（４）は装置中心軸線１ａに沿った垂直方向に延びている。 In the upper compressor 3, four cylinder parts 7 (1) to 7 (4) having the same shape are arranged radially in the horizontal direction at equal angular intervals of 90 ° with the apparatus center axis 1a as the center. Has been. Between these cylinder parts 7 (1) to 7 (4), basically four collective joint pipes 8 (1) to 8 (4) having the same shape are centered on the apparatus center axis 1 a 90. They are arranged at equiangular intervals of °. Each collective joint pipe 8 (1) to 8 (4) extends in the vertical direction along the apparatus central axis 1a.

集合継手管８（１）はその上端に空気吸入口９が開口している吸入集合継手管であり、集合継手管８（３）はその上端に圧縮空気吐出口１０が開口している吐出集合継手管である。集合継手管８（１）の空気吸入口９から吸入された空気は、ここを通って、前段の気筒部７（１）および気筒部７（４）に供給されて圧縮される。前段の気筒部７（１）で圧縮された空気は、集合継手管８（２）を通って後段の気筒部７（２）に供給されて更に圧縮される。同様に、前段の気筒部７（４）で圧縮された空気は、集合継手管８（４）を通って後段の気筒部７（３）に供給されて更に圧縮される。 The collective joint pipe 8 (1) is a suction collective joint pipe having an air suction port 9 opened at its upper end, and the collective joint pipe 8 (3) is a discharge set having a compressed air discharge port 10 opened at its upper end. It is a joint pipe. The air sucked from the air suction port 9 of the collective joint pipe 8 (1) passes through here and is supplied to the preceding cylinder part 7 (1) and the cylinder part 7 (4) and compressed. The air compressed in the front cylinder section 7 (1) is supplied to the rear cylinder section 7 (2) through the joint pipe 8 (2) and further compressed. Similarly, the air compressed in the front cylinder portion 7 (4) is supplied to the rear cylinder portion 7 (3) through the collective joint pipe 8 (4) and further compressed.

後段の気筒部７（２）、７（３）のそれぞれから吐出する圧縮空気は、集合継手管８（３）の圧縮空気吐出口１０から吐出されて、不図示の圧縮空気供給先に供給される。集合継手管８（３）は後述のように空気槽４に連通しているので、吐出する圧縮空気の脈動が空気槽４によって吸収され、一定圧力の圧縮空気が不図示の圧縮空気供給先に向けて供給される。また、空気槽４によって圧縮空気の脈動に起因する振動、騒音も抑制される。 The compressed air discharged from each of the subsequent cylinder portions 7 (2) and 7 (3) is discharged from the compressed air discharge port 10 of the collective joint pipe 8 (3) and supplied to a compressed air supply destination (not shown). The Since the collective joint pipe 8 (3) communicates with the air tank 4 as will be described later, the pulsation of the compressed air to be discharged is absorbed by the air tank 4, and the compressed air with a constant pressure is supplied to the compressed air supply destination (not shown). Supplied towards. In addition, vibration and noise caused by the pulsation of compressed air are also suppressed by the air tank 4.

（内部構成）
次に、図３は往復動型圧縮装置１を図１（ｂ）に示すＡ−Ａ線で切断した場合の概略縦断面図であり、図４は往復動型圧縮装置１を図１（ｂ）に示すＢ−Ｂ線で切断した場合の概略縦断面図である。また、図５は空気槽４の部分を示す概略横断面図である。 (Internal structure)
Next, FIG. 3 is a schematic longitudinal sectional view of the reciprocating compression device 1 taken along line AA shown in FIG. 1B, and FIG. 4 shows the reciprocating compression device 1 in FIG. It is a schematic longitudinal cross-sectional view at the time of cut | disconnecting by the BB line shown to). FIG. 5 is a schematic cross-sectional view showing a portion of the air tank 4.

これらの図を参照して説明すると、空気槽４の内側に配置されているモータ２は、モータ下側部分を覆っている円筒状のモータケース１１を備えている。モータケース１１の内側にはモータステータ１２が取り付けられており、この内側に同軸状態でモータ軸１３に固定したモータロータ１４が配置されている。モータ軸１３の下側の軸端部の部位には、モータケース１１の下側の端板部分１１ａに取り付けた回転角センサ（レゾルバ）１５が配置されており、ここから得られる信号に基づき、不図示のモータドライブによりモータ２が回転駆動される。モータ２の上側外周面部分は開放状態となっており、当該モータ２を取り囲んでいる空気槽４によって覆い隠されている。 Referring to these drawings, the motor 2 arranged inside the air tank 4 includes a cylindrical motor case 11 covering the lower part of the motor. A motor stator 12 is attached to the inner side of the motor case 11, and a motor rotor 14 fixed to the motor shaft 13 in a coaxial state is disposed on the inner side. A rotation angle sensor (resolver) 15 attached to the lower end plate portion 11a of the motor case 11 is disposed at the lower shaft end portion of the motor shaft 13, and based on a signal obtained therefrom, The motor 2 is rotationally driven by a motor drive (not shown). The upper outer peripheral surface portion of the motor 2 is in an open state and is covered with an air tank 4 surrounding the motor 2.

モータ２の上側に取り付けられている圧縮機３は、モータケース１１よりも一回り大きな矩形輪郭の筒状の圧縮機ケース１６を備えており、この圧縮機ケース１６の内部の中心には、モータ軸１３の上半端分が同軸状態で延びている。モータ軸１３は、その上側の軸端部および軸線方向の中央位置において、圧縮機ケース１６の上側の端板部分１７ａおよび下側の端板部分１７ｂにそれぞれ取り付けた軸受１８ａ、１８ｂによって回転自在の状態で支持されている。圧縮機ケース１６内に位置するモータ軸１３の上側軸部分にクランク機構２０が組み付けられており、クランク機構２０には、各気筒部７（１）〜７（４）のピストンロッド２１が連結されている。 The compressor 3 attached to the upper side of the motor 2 includes a cylindrical compressor case 16 having a rectangular outline that is slightly larger than the motor case 11. The upper half end of the shaft 13 extends coaxially. The motor shaft 13 is freely rotatable by bearings 18a and 18b attached to the upper end plate portion 17a and the lower end plate portion 17b of the compressor case 16 at the upper shaft end and the axial center position, respectively. Supported by the state. A crank mechanism 20 is assembled to the upper shaft portion of the motor shaft 13 located in the compressor case 16, and the piston rods 21 of the cylinder portions 7 (1) to 7 (4) are connected to the crank mechanism 20. ing.

各気筒部７（１）〜７（４）は、圧縮機ケース１６における４つの平坦な矩形の外周側面２２（１）〜２２（４）から水平方向に突出している。各気筒部７（１）〜７（４）は同一構造のものであり、圧縮機ケース１６の各外周側面２２（１）〜２２（４）に固定したシリンダ２３と、このシリンダ２３の先端に固定されて当該シリンダ２３の先端開口を封鎖しているシリンダヘッド２４とを備えている。図３から分かるように、シリンダ２３の内部にはピストンロッド２１の先端に取り付けたピストン２５がシリンダ中心軸線の方向に摺動可能な状態で挿入されており、シリンダ２３、シリンダヘッド２４およびピストン２５によって作動室２６が形成されている。 Each cylinder part 7 (1) -7 (4) protrudes in the horizontal direction from the four flat rectangular outer peripheral side surfaces 22 (1) -22 (4) in the compressor case 16. Each cylinder part 7 (1) to 7 (4) has the same structure, and a cylinder 23 fixed to each outer peripheral side surface 22 (1) to 22 (4) of the compressor case 16 and a tip of the cylinder 23. And a cylinder head 24 which is fixed and seals the opening of the tip of the cylinder 23. As can be seen from FIG. 3, a piston 25 attached to the tip of the piston rod 21 is inserted into the cylinder 23 so as to be slidable in the direction of the cylinder center axis, and the cylinder 23, cylinder head 24, and piston 25 are inserted. Thus, the working chamber 26 is formed.

次に、モータ２を取り囲んでいる空気槽４は、図３、図４および図５から分かるように、円筒状の空気槽ケース２７を備えている。空気槽ケース２７は、外側円筒部分２７ａと内側円筒部分２７ｂと、これらの上端を封鎖している円環状の端板部分２７ｃとを備えている。外側円筒部分２７ａと内側円筒部分２７ｂの下端側の開口は、断面がＵ字状をした円環状のベース枠５によって封鎖されている。これらの部材２７、５によって円環状の密閉空間２８（空気槽本体）が形成されている。 Next, the air tank 4 surrounding the motor 2 includes a cylindrical air tank case 27 as can be seen from FIGS. 3, 4 and 5. The air tank case 27 includes an outer cylindrical portion 27a, an inner cylindrical portion 27b, and an annular end plate portion 27c that seals the upper ends thereof. The openings on the lower end side of the outer cylindrical portion 27a and the inner cylindrical portion 27b are sealed by an annular base frame 5 having a U-shaped cross section. An annular sealed space 28 (air tank body) is formed by these members 27 and 5.

ここで、図２に示すように、対向配置されている一対の気筒部７（１）、７（３）の先端面間の幅寸法は、残りの一対の気筒部７（２）、７（４）の先端面間の幅寸法と同一であり、幅寸法Ｌ１である。これに対して、空気槽ケース２７の幅寸法（外径寸法）Ｌ２は幅寸法Ｌ１よりも小さい。すなわち、装置中心軸線１ａに直交する方向において、圧縮機３の幅寸法Ｌ１に比べて空気槽４の空気槽ケース２７の幅寸法Ｌ２の方が小さい。したがって、空気槽４を設けたことによる装置外径寸法の増加はなく、圧縮機３の外形寸法の範囲内に空気槽４が収まっている。 Here, as shown in FIG. 2, the width dimension between the front end surfaces of the pair of cylinder portions 7 (1) and 7 (3) arranged opposite to each other is the same as the remaining pair of cylinder portions 7 (2) and 7 ( It is the same as the width dimension between the end faces of 4), and is the width dimension L1. On the other hand, the width dimension (outer diameter dimension) L2 of the air tank case 27 is smaller than the width dimension L1. That is, the width dimension L2 of the air tank case 27 of the air tank 4 is smaller than the width dimension L1 of the compressor 3 in the direction orthogonal to the apparatus center axis 1a. Therefore, there is no increase in the outer diameter of the apparatus due to the provision of the air tank 4, and the air tank 4 is within the range of the outer dimensions of the compressor 3.

（気筒部と集合継手管の間の取付け部分の構造）
図２および図３を参照して、各気筒部７（１）〜７（４）と各集合継手管８（１）〜８（４）の間の取付け部分（連通部分）の構造を説明する。各気筒部７（１）〜７（４）および各集合継手管８（１）〜８（４）は基本的に同一構成であるので、気筒部７（１）と集合継手管８（２）を中心に説明する。 (Structure of the mounting part between the cylinder and the joint pipe)
With reference to FIG. 2 and FIG. 3, the structure of the attachment part (communication part) between each cylinder part 7 (1) -7 (4) and each collective coupling pipe 8 (1) -8 (4) is demonstrated. . Since each cylinder part 7 (1) -7 (4) and each collective joint pipe 8 (1) -8 (4) are fundamentally the same structure, cylinder part 7 (1) and collective joint pipe 8 (2) The explanation will be focused on.

気筒部７（１）のシリンダヘッド２５の内部には、不図示の吸入弁機構を介して作動室２６に連通可能な吸入側連通室３１および不図示の吐出弁機構を介して作動室２６に連通可能な吐出側連通室３２が形成されている。気筒部７（１）のシリンダヘッド２５には、図２から分かるように、隣接する気筒部７（４）、７（２）のそれぞれに向かう方向に対称な状態で延びている右延長部３３および左延長部３４が形成されている。右延長部３３の内部には吸入側連通室３１が延びており、左延長部３４の内部には吐出側連通室３２が延びている。 Inside the cylinder head 25 of the cylinder part 7 (1), a suction side communication chamber 31 that can communicate with the working chamber 26 via a suction valve mechanism (not shown) and a working chamber 26 via a discharge valve mechanism (not shown). A discharge side communication chamber 32 capable of communication is formed. As can be seen from FIG. 2, the cylinder head 25 of the cylinder portion 7 (1) has a right extension portion 33 extending symmetrically in a direction toward each of the adjacent cylinder portions 7 (4) and 7 (2). And the left extension part 34 is formed. The suction side communication chamber 31 extends inside the right extension portion 33, and the discharge side communication chamber 32 extends inside the left extension portion 34.

右延長部３３および左延長部３４における内側表面（圧縮機ケース１６の外周側面２２（１））の側を向く表面）のそれぞれには、集合継手管８（１）、８（２）を取り付けるための気筒側取付面３３ａ、３４ａが形成されている。気筒側取付面３３ａには吸入側連通室３１に連通している気筒側連通口（図示せず）が開口しており、他方の気筒側取付面３４ａには吐出側連通室３２に連通している気筒側連通口（図示せず）が開口している。 Collective joint pipes 8 (1) and 8 (2) are attached to the inner surfaces (the surfaces facing the outer peripheral side surface 22 (1)) of the right extension 33 and the left extension 34, respectively. Cylinder-side mounting surfaces 33a and 34a are formed. A cylinder side communication port (not shown) communicating with the suction side communication chamber 31 is opened on the cylinder side mounting surface 33a, and the other cylinder side mounting surface 34a is connected with the discharge side communication chamber 32. A cylinder side communication port (not shown) is opened.

これに対して、集合継手管８（２）の外周面には、一対の取付用ブラケット３５、３６が取り付けられている。取付用ブラケット３５には管側取付面３５ａが形成されており、ここが右側に隣接している気筒部７（１）の左延長部３４の気筒側取付面３４ａに面接触状態で取り付けられる。同様に、取付用ブラケット３６にも管側取付面３６ａが形成されており、ここが、左側に隣接している気筒部７（２）の右延長部３３の気筒側取付面３３ａに面接触状態で取り付けられる。これらの管側取付面３５ａ、３６ａのそれぞれには、気筒側連通口にそれぞれ連通する管側連通口３５ｂ、３６ｂが形成されている。本例では、隣接する気筒部間の気筒側取付面３３ａ、３４ａが直交しているので、管側取付面３５ａ、３６ａも直交面となっている。 On the other hand, a pair of mounting brackets 35 and 36 are attached to the outer peripheral surface of the collective joint pipe 8 (2). The mounting bracket 35 is formed with a pipe-side mounting surface 35a, which is mounted in surface contact with the cylinder-side mounting surface 34a of the left extension 34 of the cylinder portion 7 (1) adjacent to the right side. Similarly, a pipe-side mounting surface 36a is also formed on the mounting bracket 36, which is in surface contact with the cylinder-side mounting surface 33a of the right extension 33 of the cylinder portion 7 (2) adjacent to the left side. It is attached with. Pipe side communication ports 35b and 36b communicating with the cylinder side communication ports are formed in the pipe side mounting surfaces 35a and 36a, respectively. In this example, since the cylinder side mounting surfaces 33a and 34a between adjacent cylinder parts are orthogonal, the pipe side mounting surfaces 35a and 36a are also orthogonal surfaces.

なお、集合継手管８（２）における取付用ブラケット３５、３６の間の外周面部分には、上下方向に延びる複数枚の放熱フィン３７が形成されている。これにより、各集合継手管８（１）〜８（４）はインタークーラとして機能する。 A plurality of heat radiation fins 37 extending in the vertical direction are formed on the outer peripheral surface portion between the mounting brackets 35 and 36 in the collective joint pipe 8 (2). Thereby, each joint pipe 8 (1) -8 (4) functions as an intercooler.

このように各取付面が形成されているので、図２から分かるように、集合継手管８（２）の管側取付面３５ａ、３６ａを、気筒部７（１）および気筒部７（２）の気筒側取付面３４ａ、３３ａに位置決めして当接し、この状態で不図示の締結用ボルトを用いて集合継手管８（２）を気筒部７（１）と気筒部７（２）の間に固定することができる。集合継手管８（２）を固定すると、当該集合継手管８（２）を介して、気筒部７（１）の吐出側を気筒部７（２）の吸入側に連通する連通路が形成される。同様に、集合継手管８（４）を気筒部７（４）、７（３）の間に取り付けると、当該集合継手管８（４）を介して、気筒部７（４）の吐出側を気筒部７（３）の吸入側に連通する連通路が形成される。また、吸入集合継手管８（１）を気筒部７（１）、７（４）の間に取り付けると、空気吸入口９を介して外部から吸入された空気を気筒部７（１）、７（４）の吸入側に導入する連通路が形成される。吐出集合継手管８（３）を気筒部７（２）、７（３）の間に取り付けると、気筒部７（２）、７（３）から吐出される圧縮空気を空気吐出口１０に導く連通路が形成される。 Since each mounting surface is formed in this way, as can be seen from FIG. 2, the tube side mounting surfaces 35a and 36a of the collective joint pipe 8 (2) are connected to the cylinder portion 7 (1) and the cylinder portion 7 (2). The cylinder-side mounting surfaces 34a and 33a are positioned and brought into contact with each other, and in this state, the collective joint pipe 8 (2) is connected between the cylinder portion 7 (1) and the cylinder portion 7 (2) using a fastening bolt (not shown). Can be fixed to. When the collective joint pipe 8 (2) is fixed, a communication path is formed through which the discharge side of the cylinder part 7 (1) communicates with the suction side of the cylinder part 7 (2) via the collective joint pipe 8 (2). The Similarly, when the collective joint pipe 8 (4) is attached between the cylinder parts 7 (4) and 7 (3), the discharge side of the cylinder part 7 (4) is connected via the collective joint pipe 8 (4). A communication path communicating with the suction side of the cylinder part 7 (3) is formed. Further, when the suction joint pipe 8 (1) is attached between the cylinder parts 7 (1) and 7 (4), the air sucked from the outside through the air suction port 9 is supplied to the cylinder parts 7 (1) and 7 (7). A communication path to be introduced to the suction side of (4) is formed. When the discharge joint pipe 8 (3) is attached between the cylinder portions 7 (2) and 7 (3), the compressed air discharged from the cylinder portions 7 (2) and 7 (3) is guided to the air discharge port 10. A communication path is formed.

この構成によれば、隣接する気筒部の左右の気筒側取付面に、集合継手管の側の管側取付面を位置決めして取り付け、ボルトなどの締結金具によって締結固定するだけで簡単にガスの吸入路、吐出路を形成できる。また、構造の複雑化を招くことなく各集合継手管を各気筒部の間に簡単に組み込むことができる。 According to this configuration, the gas side mounting surface can be simply positioned and attached to the left and right cylinder side mounting surfaces of the adjacent cylinder portion, and fastened and fixed by the fastening fittings such as bolts. A suction path and a discharge path can be formed. In addition, each collective joint pipe can be easily incorporated between the cylinder portions without causing a complicated structure.

（集合継手管の空気槽への取付け部分の構造）
次に、図２および図４を参照して、各集合継手管８（１）〜８（４）の空気槽ケース２７への取付け部分の構造を説明する。 (Structure of the part where the joint pipe is attached to the air tank)
Next, with reference to FIG. 2 and FIG. 4, the structure of the attachment part to the air tank case 27 of each joint pipe 8 (1) -8 (4) is demonstrated.

集合継手管８（１）〜８（４）は、それぞれ、同一形状の円筒状スペーサ４１を介して、空気槽ケース２７の円環状端面２７ｄに、締結用のボルト４２によって垂直に固定される。空気槽ケース２７の円環状端面２７ｄにおける吐出集合継手管８（３）に対峙する部位には、空気槽内部の密閉空間２８に連通している連通口４３が形成されている。吐出集合継手管８（３）を円環状端面２７ｄに取り付けると、連通口４３および円筒状スペーサ４１の中空部４１ａを介して、吐出集合継手管８（３）と空気槽４の密閉空間２８とが連通状態になる。 The collective joint pipes 8 (1) to 8 (4) are vertically fixed to the annular end surface 27 d of the air tank case 27 by the fastening bolts 42 via the cylindrical spacers 41 having the same shape. A communication port 43 that communicates with the sealed space 28 inside the air tank is formed at a portion of the annular end surface 27d of the air tank case 27 facing the discharge joint pipe 8 (3). When the discharge collective joint pipe 8 (3) is attached to the annular end surface 27d, the discharge collective joint pipe 8 (3) and the sealed space 28 of the air tank 4 are connected via the communication port 43 and the hollow portion 41a of the cylindrical spacer 41. Will be in communication.

以上説明したように、本実施の形態では、４気筒の往復動型圧縮装置１にとってデッドスペースが存在するモータ２の周辺に円筒形状の空気槽４を設けることで容積および重量を規定値以下にすることが可能である。また、集合継手管８（１）〜８（４）（インタークーラ）を用いて各気筒部間の連通路を形成することで、連通路を外部配管を引き回すことなく軽量でコンパクトな形態で組み込むことができ、これによっても装置の軽量小型化を達成できる。 As described above, in the present embodiment, the volume and weight of the four-cylinder reciprocating compressor 1 are reduced to a predetermined value or less by providing the cylindrical air tank 4 around the motor 2 where dead space exists. Is possible. Further, by forming the communication path between the cylinder portions using the collective joint pipes 8 (1) to 8 (4) (intercooler), the communication path is assembled in a lightweight and compact form without routing the external pipe. This can also reduce the weight and size of the apparatus.

また、本例のような２段圧縮機の場合には、空気槽４によって、モータ１回転当り２回の吐出工程において生ずる圧縮空気の圧力リップルを防止できるので、脈動の少ない静粛な運転が出来る小型で圧力一定制御が可能な圧縮装置を提供できる。 Further, in the case of the two-stage compressor as in the present example, the air tank 4 can prevent the pressure ripple of the compressed air generated in the discharge process twice per rotation of the motor, so that a quiet operation with less pulsation can be performed. A compact compression device capable of constant pressure control can be provided.

これに加えて、往復動型圧縮装置１を回転数制御することで、必要な空気量を最小の電力でまかなうことが出来るので、省エネであると共に、各部品の寿命を延ばすことが出来る。よって、高速回転可能でメンテナンスフリーの小型の圧縮装置を実現できる。 In addition, by controlling the number of revolutions of the reciprocating compressor 1, the necessary amount of air can be covered with the minimum power, so that the energy can be saved and the life of each component can be extended. Therefore, a compact compressor that can rotate at high speed and is maintenance-free can be realized.

したがって、本実施の形態に係る往復動型圧縮装置１はデスクトップ型のコンプレッサーとして用いることができ、音が静かであるので、防音カバー等で覆う必要が無く、熱もこもりにくい。 Therefore, the reciprocating compression device 1 according to the present embodiment can be used as a desktop compressor, and since the sound is quiet, it is not necessary to cover with a soundproof cover or the like, and heat is not easily stored.

なお、高圧力仕様の場合には往復動型圧縮装置１が高温になる場合も考えられる。この場合には、例えば、モータ軸の先端にファンを設けることで、モータ２と圧縮機３の間に冷却風を通すことにより過熱状態に陥ることを回避できる。 In the case of high pressure specifications, the reciprocating compression device 1 may be at a high temperature. In this case, for example, by providing a fan at the tip of the motor shaft, it is possible to avoid falling into an overheated state by passing cooling air between the motor 2 and the compressor 3.

（一段圧縮型の構成）
上記の実施の形態は本発明を二段圧縮型に適用した場合のものである。本発明は一段圧縮型の圧縮装置にも同様に適用可能である。例えば、上記構成の往復動型圧縮装置１の構成を利用して一段圧縮型の圧縮装置を構成する場合には次のようにすればよい。 (Configuration of one-stage compression type)
The above embodiments are those when the present invention is applied to a two-stage compression type. The present invention can be similarly applied to a one-stage compression type compression apparatus. For example, when a one-stage compression type compression device is configured using the configuration of the reciprocating compression device 1 having the above-described configuration, the following may be performed.

まず、集合継手管８（３）として吸入集合継手管８（１）と同一構成のものを配置し、集合継手管８（２）、８（４）として吐出集合継手管８（３）と同一構成のものを配置する。換言すると、２本の吸入集合継手管と２本の吐出集合継手管を配置する。 First, the joint joint pipe 8 (3) having the same configuration as the suction joint pipe 8 (1) is arranged, and the joint pipes 8 (2) and 8 (4) are the same as the discharge joint pipe 8 (3). Arrange the configuration. In other words, two suction collective joint pipes and two discharge collective joint pipes are arranged.

吸入集合継手管８（１）を両側の気筒部７（１）および７（４）の吸入側に連通させ、吸入集合継手管８（３）を両側の気筒部７（２）、７（３）の吸入側に連通させる。また、吐出集合継手管８（２）を両側の気筒部７（１）、７（２）の吐出側に連通させ、吐出集合継手管８（４）を両側の気筒部７（３）、７（４）の吐出側に連通させる。 The suction joint pipe 8 (1) is communicated with the suction sides of the cylinder parts 7 (1) and 7 (4) on both sides, and the suction joint pipe 8 (3) is connected to the cylinder parts 7 (2), 7 (3 ) Communicate with the inhalation side. Further, the discharge joint pipe 8 (2) communicates with the discharge sides of the cylinder parts 7 (1) and 7 (2) on both sides, and the discharge joint pipe 8 (4) is connected to the cylinder parts 7 (3) and 7 on both sides. Communicate with the discharge side of (4).

この構成では、吸入集合継手管８（１）の空気吸入口９から吸入された空気が、両側の気筒部７（１）、７（４）においてそれぞれ圧縮された後に、それぞれ、吐出集合継手管８（２）、８（４）の圧縮空気吐出口１０から吐出される。同様に、吸入集合継手管８（３）の空気吸入口９から吸入された空気が、両側の気筒部７（２）、７（３）においてそれぞれ圧縮された後に、それぞれ、吐出集合継手管８（２）、８（４）の圧縮空気吐出口１０から吐出される。 In this configuration, after the air sucked from the air suction port 9 of the suction collective joint pipe 8 (1) is compressed in the cylinder portions 7 (1) and 7 (4) on both sides, respectively, the discharge collective joint pipes respectively. It is discharged from the compressed air discharge ports 10 of 8 (2) and 8 (4). Similarly, after the air sucked from the air suction port 9 of the suction joint pipe 8 (3) is compressed in the cylinder portions 7 (2) and 7 (3) on both sides, the discharge joint pipe 8 (2), 8 (4) is discharged from the compressed air discharge port 10.

この場合にも、２本の吐出集合継手管８（２）、８（４）を空気槽４に連通させておく。これにより、吐出される圧縮空気の脈動が空気槽４によって吸収あるいは緩和され、一定圧力の圧縮空気が供給先に供給される。 Also in this case, the two discharge joint pipes 8 (2) and 8 (4) are communicated with the air tank 4. Thereby, the pulsation of the compressed air discharged is absorbed or relieved by the air tank 4, and the compressed air having a constant pressure is supplied to the supply destination.

１往復動型圧縮装置
１ａ装置中心軸線
２モータ
３圧縮機
４空気槽
５ベース枠
６支持脚
７（１）〜７（４）気筒部
８（１）〜８（４）集合継手管
９空気吸入口
１０圧縮空気吐出口
１１モータケース
１２モータステータ
１３モータ軸
１４モータロータ
１５回転角センサ（レゾルバ）
１６圧縮機ケース
１７ａ、１７ｂ端板部分
１８ａ、１８ｂ軸受
２０クランク機構
２１ピストンロッド
２２（１）〜２２（４）外周側面
２３シリンダ
２４シリンダヘッド
２５ピストン
２６作動室
２７空気槽ケース
２７ａ外側円筒部分
２７ｂ内側円筒部分
２７ｃ端板部分
２７ｄ円環状端面
３１吸入側連通室
３２吐出側連通室
３３右延長部
３３ａ気筒側取付面
３４左延長部
３４ａ気筒側取付面
３５、３６取付用ブラケット
３５ａ、３６ａ管側取付面
３５ｂ、３６ｂ管側連通口
３７放熱フィン
４１円筒状スペーサ
４２ボルト
４３連通口
Ｌ１、Ｌ２幅寸法 DESCRIPTION OF SYMBOLS 1 Reciprocating type compressor 1a Apparatus central axis 2 Motor 3 Compressor 4 Air tank 5 Base frame 6 Support leg 7 (1) -7 (4) Cylinder part 8 (1) -8 (4) Collective joint pipe 9 Air suction Port 10 Compressed air discharge port 11 Motor case 12 Motor stator 13 Motor shaft 14 Motor rotor 15 Rotation angle sensor (resolver)
16 Compressor cases 17a, 17b End plate portions 18a, 18b Bearing 20 Crank mechanism 21 Piston rods 22 (1) -22 (4) Outer peripheral surface 23 Cylinder 24 Cylinder head 25 Piston 26 Working chamber 27 Air tank case 27a Outer cylindrical portion 27b Inner cylindrical portion 27c End plate portion 27d Annular end surface 31 Suction side communication chamber 32 Discharge side communication chamber 33 Right extension portion 33a Cylinder side mounting surface 34 Left extension portion 34a Cylinder side mounting surface 35, 36 Mounting brackets 35a, 36a Pipe side Mounting surface 35b, 36b Pipe side communication port 37 Radiation fin 41 Cylindrical spacer 42 Bolt 43 Communication port L1, L2 Width dimension

Claims

A motor (2), a compressor (3) coaxially attached to the front end of the motor (2), and an air tank (4) disposed so as to surround the outer periphery of the motor (2);
The compressor (3) protrudes radially at a predetermined angular interval from a cylindrical compressor case (16) and an outer peripheral surface (22 (1) to 22 (4)) of the compressor case (16). A plurality of cylinder portions (7 (1) to 7 (4)) and the cylinder portion (7) adjacent to the outside of the outer peripheral surface (22 (1) to 22 (4)) of the compressor case (16). (1) to 7 (4)) each having a plurality of collective joint pipes (8 (1) to 8 (4)),
Each of the collective joint pipes (8 (1) to 8 (4)) communicates with the suction port or the discharge port of the adjacent cylinder part (7 (1) to 7 (4)),
The collective joint pipe includes at least a suction collective pipe (8 (1)) having a gas suction port (9) for sucking gas from the outside, and the cylinder after being sucked from the gas suction port (9). And a discharge joint joint pipe (8 (3)) having a compressed gas discharge port (10) for discharging gas compressed in one or more stages through the section (7 (1) to 7 (4)) And
The reciprocating compressor (1), wherein the discharge joint pipe (8 (3)) communicates with the air tank (4).

In claim 1,
Four cylinder parts (7 (1) -7 (4)) are arranged radially at equal angular intervals,
The four collective joint tubes (8 (1) to 8 (4)) are arranged at equiangular intervals,
The air tank (4) includes a cylindrical air tank case (27),
The width dimension between the tip surfaces of the pair of cylinder parts (7 (1), 7 (3)) opposed to each other and the tip of the remaining pair of cylinder parts (7 (2), 7 (4)) The width dimension between the surfaces is the same, and when this is the width dimension (L1) of the compressor (3),
In a direction perpendicular to the device central axis (1a), the compressor outer diameter is the width dimension (L2) of the said air chamber case of the air tank (27) than the width dimension of (3) (L1) A reciprocating compression device (1) characterized by being smaller.

In claim 1 or 2,
Each of the cylinder parts (7 (1) to 7 (4)) includes a cylinder (23) attached to an outer peripheral surface (22 (1) to 22 (4)) of the compressor case (16), and the cylinder. A cylinder head (24) sealing the tip opening of (23),
The cylinder head (24) includes a left extension portion (34) and a right extension portion (right extension portions) extending in a symmetrical manner in the direction toward the cylinder portions (7 (1) to 7 (4)). 33) is formed,
A gas suction side communication chamber (31) is formed inside one of the left extension (34) and the right extension (33), and a compressed gas discharge side communication chamber (32) is formed inside the other. Formed,
On the inner surfaces of the left extension (34) and the right extension (33) facing the outer peripheral surface of the compressor case (16), the collective joint pipes (8 (1) to 8 (4) )) Is formed on the cylinder side mounting surface (34a, 33a),
A cylinder side communication port communicating with the suction side communication chamber (31) or the discharge side communication chamber (32) is opened in each of the cylinder side mounting surfaces (34a, 33a),
Each of the collective joint pipes (8 (1) to 8 (4)) is a pipe extending in a direction along the apparatus central axis (1a), and the left extension (34) is formed on the outer peripheral surface thereof. ) And pipe-side attachment surfaces (35a, 36a) attached to the cylinder-side attachment surfaces (34a, 33a) of the right extension portion (33), respectively.
Each of the pipe side attachment surfaces (35a, 36a) is formed with a pipe side communication port (35b, 36b) communicating with the cylinder side communication port in a state of being attached to the cylinder side attachment surface (34a, 33a). A reciprocating compression device (1) characterized in that

In claim 3,
The air tank case (27) forming the air tank (4) has an annular end surface (27d) facing the compressor (3),
Each of the collective joint pipes (8 (1) to 8 (4)) is attached to the annular end surface (27d) via a cylindrical spacer (41),
An opening is formed at the end of the discharge end joint pipe (8 (3)) on the annular end surface (27d) side, and the compressed gas discharge port (10) is formed at the other end. Has been
The annular end surface (27d) of the air tank case (27) has a communicating port (4) connected to the air tank (4) at a portion facing the opening of the discharge joint pipe (8 (3)). 43) is formed,
The discharge joint pipe (8 (3)) communicates with the air tank (4) through the hollow portion (41a) of the cylindrical spacer (41) and the communication port (43).
A reciprocating compression device characterized in that the gas suction port (9) is formed at an end of the suction collective joint pipe (8 (1)) opposite to the annular end surface (27d). (1).

In any one of claims 1 to 4,
The cylinder part includes two first and second front cylinder parts (7 (1) and 7 (4)) for compressing the gas sucked from the suction collective joint pipe, and the first and second front stages. And two first and second rear cylinder parts (7 (2), 7 (3)) for further compressing the single-stage compressed gas compressed in each of the cylinder parts,
The collective joint pipe includes the suction collective joint pipe (8 (1)) and the discharge collective joint pipe (8 (3)), and two first and second collective joint pipes (8 (2), 8 (4)) and
The suction collective joint pipe (8 (1)) communicates with first and second front-stage intake ports provided in the first and second front-stage cylinder portions (7 (1) and 7 (4)), respectively. And
The discharge joint pipe (8 (3)) communicates with first and second rear-stage discharge ports provided in the first and second rear-stage cylinder portions (7 (2) and 7 (3)), respectively. And
The first collective joint pipe (8 (2)) has a first front-stage discharge port provided in the first front-stage cylinder part (7 (1)) as the first rear-stage cylinder part (7 (2)). Communicates with the first second-stage inlet provided,
The second joint pipe (8 (4)) has a second front-stage discharge port provided in the second front-stage cylinder part (7 (4)) as the second rear-stage cylinder part (7 (3)). A reciprocating compression device (1) characterized in that it communicates with a second rear-stage suction port provided.

In any one of claims 1 to 4,
The cylinder portion includes first to fourth cylinder portions,
The joint joint pipe includes first and second suction joint pipes as the suction joint pipe and first and second discharge joint pipes as the discharge joint pipe,
The first suction collective joint pipe communicates with a suction port provided in each of the first cylinder part and the second cylinder part,
The second intake joint pipe communicates with an intake port provided in each of the third cylinder part and the fourth cylinder part,
The first discharge collective joint pipe communicates with a discharge port provided in each of the second cylinder part and the third cylinder part,
2. The reciprocating compression device according to claim 1, wherein the second discharge collective joint pipe communicates with a discharge port provided in each of the third cylinder portion and the fourth cylinder portion.