JP4323566B2 - Tank integrated compressor - Google Patents

Description

  The present invention relates to a tank-integrated compressor that is suitably used for compressing a fluid such as air, and more particularly to a tank-integrated compressor that is compact in its entirety and can be easily carried.

  In general, a cylindrical tank for storing compressed fluid, an electric motor provided on the tank, a distance from the electric motor in the length direction of the tank, and provided on the tank and rotated by the electric motor A compressor main body to be driven, the compressor main body comprising a crankcase rotatably provided with a crankshaft, a cylinder mounted on the crankcase, and a piston provided on the cylinder and in the cylinder There is known a tank-integrated compressor composed of a cylinder head that defines a compression chamber therebetween, and a suction chamber, a discharge chamber, and the like that are provided independently of each other in the cylinder head ( For example, see Patent Document 1).

  In this type of conventional tank-integrated compressor, the crankshaft of the compressor body is driven to rotate by an electric motor via pulleys, belts, etc., and the piston reciprocates in the cylinder according to the rotation of the crankshaft. By doing so, fluid such as air sucked from the suction chamber side is compressed in the compression chamber. Then, the compressed fluid compressed in the compression chamber of the compressor main body is discharged from the discharge chamber side to the tank via a pipe or the like, and stored in this tank.

JP-A 63-235678

  By the way, in the above-described prior art, the electric motor and the compressor main body are arranged on a single tank having a substantially cylindrical shape so as to be separated from each other in the length direction of the tank, and the electric motor, the crankcase, and the like are disposed. It is configured to extend in a direction substantially perpendicular to the length direction of the tank.

  For this reason, in the prior art, the whole compressor is increased in size and requires a large amount of labor for carrying, and there is also a problem that a large occupied space is taken, for example, in a truck for transportation.

  The present invention has been made in view of the above-described problems of the prior art, and the present invention can be made compact by making the whole small, can occupy a small space during transportation, and can easily carry around. An object of the present invention is to provide a tank integrated compressor.

To solve the problems described above, the tank-integrated compressor according to the present invention, the left, and a pair of cylindrical storage tanks, each compressed fluid extend parallel with each other spaced apart to the right is stored, the respective storage tanks the axial direction moving motor electrostatic having a rotational axis extending in the same direction of the crank case having a crankshaft that rotates the rotation shaft integral with the electric motor, provided on the storage tank, respectively cylinder head to the tip comprising constructed from a high pressure side cylinder and the low pressure side cylinder, compressor body in which the piston within the two cylinders mounted to the crankcase Ru is driven by the electric movement motors to compress the fluid sucked from the outside by a reciprocating Extending through the crankcase in the axial direction and disposed at the tip of the rotating shaft of the electric motor protruding from the crankcase. A cooling fan that generates cooling air along the length direction of the storage tank, and a communication pipe that supplies the compressed fluid generated in the low-pressure side cylinder to the high-pressure side cylinder, between the pair of storage tanks A rotating shaft of the electric motor is disposed above the space, and the high-pressure side cylinder and the low-pressure side cylinder are disposed to face each other in the horizontal direction across the crankcase, and the shafts of the storage tanks The cylinder head extends in the horizontal direction so as not to protrude from the storage tank and intersects the direction, and is disposed above the storage tank.

According to the present invention, the entire compressor it is possible to form a compact and downsized, the space occupied during transportation can be reduced, it is possible to easily carry work in the work site or the like.

1 is a perspective view showing a tank-integrated two-stage air compressor according to an embodiment of the present invention. It is a top view which shows the two-stage type air compressor of the state which removed the protective cover in FIG. It is a front view which shows the two-stage air compressor of the state which removed the protective cover in FIG. FIG. 4 is a left side view of the two-stage air compressor shown in FIG. 3. FIG. 4 is a right side view of the two-stage air compressor shown in FIG. 3. FIG. 4 is a rear view of the two-stage air compressor shown in FIG. 3.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  Here, FIGS. 1 to 6 show an example in which the tank-integrated compressor according to the embodiment of the present invention is applied to a two-stage air compressor.

  In the figure, reference numerals 1 and 1 denote a pair of storage tanks (hereinafter referred to as tanks 1) which are spaced apart from each other to the left and right and extend in parallel with each other. Each tank 1 is substantially made of a metal tube or the like as shown in FIGS. It is formed as a cylindrical sealed container, and its length dimension is, for example, about 3 to 4 times the outer diameter of the tank 1. Further, on each tank 1, a protective cover 2 is provided as shown in FIG. 1 so as to cover an electric motor 8, a compressor main body 12 and the like, which will be described later, as shown in FIG. 1, and the protective cover 2 is removed as necessary. It has become. 2 to 6, the protective cover 2 is removed.

  Frames 3 and 4 connect the tanks 1 in the left-right direction. The frames 3 and 4 are made of a metal material having high rigidity as shown in FIGS. 4 and 5, for example, both front and rear ends of each tank 1. On the side, the tank 1 is integrally fixed. The frames 3 and 4 are configured to support the electric motor 8 together with the compressor body 12 described later from below.

  5 are cushion rubbers provided at both ends of each tank 1, and the cushion rubber 5 is formed of a resin material such as synthetic rubber, and is spaced apart in the length direction of each tank 1 so that each tank 1 It is attached to the bottom side. Each cushion rubber 5 is configured to stably place each tank 1 on the ground of the work site and to protect the lower surface side of each tank 1. In addition, each cushion rubber 5 has a function of attenuating vibrations from the compressor body 12 and the electric motor 8 by being elastic.

  6 and 6 are handles for carrying the compressor, and each handle 6 is formed in a substantially U shape by a rigid material as shown in FIG. It arrange | positions so that the right tank 1 and 1 may be straddled. Here, on both ends of each tank 1, mounting brackets 7, 7,... For the respective handles 6 are provided on the upper surface side thereof as shown in FIG. It is attached so as to protrude upward from the tank 1.

  Reference numeral 8 denotes an electric motor as a drive motor located between the tanks 1 and mounted on the frame 4. The electric motor 8 has a stator and a rotor in a motor casing 9 as shown in FIG. The rotary shaft 10 is rotationally driven by the power supply. As shown in FIG. 2, the electric motor 8 has a motor casing 9 extending in parallel in the length direction of each tank 1, and the tip side thereof is integrated with a crankcase 13 described later. Further, the lower 9A side of the motor casing 9 is disposed so as to partially enter the space S between the tanks 1 as shown in FIG. 5, and the motor casing 9 and the tanks 1 have a substantially equilateral triangular arrangement relationship. It is what.

  Here, the rotating shaft 10 of the electric motor 8 extends through the crankcase 13 in the axial direction, and a cooling fan 11 is attached to the tip end side of the rotating shaft 10 protruding from the crankcase 13. The electric motor 8 generates cooling air along the length direction of each tank 1 by rotating the cooling fan 11, and this cooling air is directed toward the electric motor 8 in and out of the crankcase 13. Thus, the compressor body 12 and the electric motor 8 are cooled by an air flow.

  Reference numeral 12 denotes a compressor main body disposed between the tanks 1 through the frame 4 and the like together with the electric motor 8, and the compressor main body 12 includes a crankcase 13 and cylinders 14 and 17 which will be described later. 4 constitutes a so-called horizontally opposed two-stage air compressor arranged so as to face each other in the horizontal direction.

  Reference numeral 13 denotes a crankcase integrated with the motor casing 9 of the electric motor 8. The crankcase 13 is formed in a substantially cylindrical shape and is disposed between the tanks 1 so as to be coaxial with the motor casing 9. A crankshaft (not shown) is rotatably provided in the crankcase 13, and the crankshaft rotates integrally with the rotary shaft 10 of the electric motor 8. Further, as shown in FIG. 4, the lower case 13A side of the crankcase 13 is disposed so as to partially enter the space S between the tanks 1, and the crankcase 13 and the tanks 1 are arranged in a substantially equilateral triangle as a whole. Have a relationship.

  Here, as shown in FIG. 4, the cooling fan 11 is formed with a large blade diameter so as to effectively utilize the space between the tanks 1 on the end side of the crankcase 13. The cooling fan 11 is rotationally driven by the rotating shaft 10 in this space, and the cooling air volume is increased as much as possible. In addition, the crankcase 13 is provided with an outside air inlet 13B (see FIG. 4) at the end on the cooling fan 11 side, and the inlet 13B is a suction for taking purified air into the crankcase 13 A filter (not shown) is attached.

  14 is a low-pressure side cylinder constituting the first cylinder provided in the crankcase 13, and the low-pressure side cylinder 14 is fixed to the crankcase 13 at the base end side as shown in FIG. 2 and FIG. 1 (left tank 1 shown in FIG. 4) extends horizontally. A low-pressure side piston (not shown) is slidably inserted into the low-pressure side cylinder 14, and this piston reciprocates within the cylinder 14 in accordance with the rotation of the crankshaft.

  A cylinder head 15 is provided on the tip side of the low pressure side cylinder 14 and constitutes a first cylinder together with the low pressure side cylinder 14. A suction chamber and a discharge chamber (not shown) are formed in the cylinder head 15. The suction chamber and the discharge chamber are communicated and blocked in the low pressure side cylinder 14 via a suction valve and a discharge valve (not shown), respectively. The suction chamber communicates with the crankcase 13 via an intake passage (not shown) or the like, and the air flowing into the crankcase 13 from the intake port 13B side is reduced in response to the reciprocating motion of the piston. The air is sucked into the cylinder 14.

  Reference numeral 16 denotes a discharge pipe connected to the discharge chamber side of the cylinder head 15. The discharge pipe 16 is connected to a high-pressure side cylinder head 18 via a communication pipe 19 described later, and compressed air generated in the low-pressure side cylinder 14. Is discharged from the discharge chamber of the cylinder head 15 to the communication pipe 19 side.

  Reference numeral 17 denotes a high-pressure side cylinder constituting a second cylinder attached to the crankcase 13 so as to face the low-pressure side cylinder 14 in the horizontal direction. The high-pressure side cylinder 17 has a base end side as shown in FIGS. Fixed to the crankcase 13, the tip end side extends in a horizontal direction onto the other tank 1 (the right tank 1 shown in FIG. 4). The high pressure side cylinder 17 is formed with a smaller cylinder diameter than the low pressure side cylinder 14, and a high pressure side piston (not shown) is slidably fitted into the high pressure side cylinder 17.

  Reference numeral 18 denotes a cylinder head which is provided at the front end side of the high pressure side cylinder 17 and constitutes a second cylinder together with the high pressure side cylinder 17. In the cylinder head 18, as in the cylinder head 15 on the low pressure side, a suction chamber and a discharge are provided. A chamber is formed, and the suction chamber and the discharge chamber are communicated and blocked in the high-pressure side cylinder 17 through a suction valve and a discharge valve (both not shown), respectively. As shown in FIGS. 4 and 5, the end portions of the cylinder heads 15 and 18 are disposed at positions inside the tanks 1 so as not to protrude left and right from the tanks 1.

  Reference numeral 19 is a communication pipe in which the suction chamber side of the cylinder head 18 is connected to the discharge pipe on the low pressure side. The communication pipe 19 supplies compressed air generated in the low pressure side cylinder 14 to the cylinder head 18 side on the high pressure side. It is. Further, the communication pipe 19 is curved downward so as to bypass the lower side of the crankcase 13, so that the drain or the like in the compressed air generated in the low pressure side cylinder 14 enters the high pressure side cylinder 17 side. It has a configuration to suppress.

  20 is a discharge pipe connected to the discharge chamber of the cylinder head 18. The discharge pipe 20 extends horizontally from the lower surface side of the cylinder head 18 forward along the tank 1, as shown in FIGS. Once bent upward in a substantially L shape and extended on the high-pressure side cylinder 17 and cylinder head 18 in a substantially U shape, it is bent downward again and the lower end (tip) side is the right tank in FIG. 1 is connected. The discharge pipe 20 guides high-pressure compressed air discharged from the high-pressure side cylinder 17 into the tank 1.

  21 is an unloading conduit, and 22 is an unloading valve connected to the conduit 21. The unloading valve 22 is opened and closed via an electromagnetic valve 23 shown in FIG. 6, and is normally kept closed. Thus, the compressor main body 12 is loaded. When the unload valve 22 is opened by the electromagnetic valve 23, the compressed air guided from the cylinder head 18 side of the high pressure side cylinder 17 through the conduit 21 is released to the atmosphere, and the compressor body 12 is unloaded. It is something to drive.

  Reference numeral 24 denotes a compressed air supply pipe for communicating between the tanks 1. The supply pipe 24 is connected to one tank 1 at one end side bypassing the rear end side of the electric motor 8 as shown in FIG. The other end side extends forward along the motor casing 9 and the crankcase 13 of the electric motor 8 and bends in a substantially U shape as shown in FIG. The lower end (front end) side is connected to the other tank 1.

  Reference numerals 25 and 26 are compressed air supply ports, and the supply ports 25 and 26 are individually connected at their proximal ends to intermediate portions of the supply pipe 24 through valves or the like, and the distal ends are on the tank 1 as shown in FIG. It extends. Further, external pipes (both not shown) for supplying compressed air to pneumatic devices such as air cylinders and air motors are detachably connected to the distal ends of the supply ports 25 and 26, respectively. When the valve is opened, the compressed air in each tank 1 is allowed to be supplied to an external pneumatic device.

  Reference numerals 27 and 28 denote pressure setting devices connected to intermediate portions of the supply ports 25 and 26. The pressure setting devices 27 and 28 are configured by variable pressure setting type pressure reducing valves or the like, and the pressure of compressed air supplied to the pneumatic equipment. Can be adjusted manually by manual operation. Reference numerals 29 and 30 denote pressure gauges. The pressure gauges 29 and 30 are for the operator to visually confirm the pressure of the compressed air set by the pressure setting devices 27 and 28.

  31 is a drain cock that discharges the drain in the supply pipe 24 to the outside through the drain tube 32. The drain cock 31 includes a tank 1 on the left side and an end of the supply pipe 24 as shown in FIGS. Between the two.

  The tank-integrated two-stage air compressor according to this embodiment has the above-described configuration. Next, the operation thereof will be described.

  First, when power is supplied to the electric motor 8 and the rotary shaft 10 is driven to rotate, the cooling fan 11 rotates, whereby cooling air flows along the inside and outside of the crankcase 13 and the motor casing 9, and the inside of the crankcase 13 , The crankshaft is rotated, and the pistons are reciprocated in the low pressure side cylinder 14 and the high pressure side cylinder 17.

  Thus, in the low-pressure side cylinder 14, the air flowing in from the intake port 13 </ b> B side of the crankcase 13 is sucked into the cylinder 14 through the intake passage and the suction chamber as the piston reciprocates, and is compressed. The first stage of compressed air is generated.

  The compressed air generated in the low pressure side cylinder 14 is discharged from the discharge pipe 16 of the cylinder head 15 into the communication pipe 19 and continuously sucked into the high pressure side cylinder 17 through the communication pipe 19. As a result, high-pressure compressed air in the second stage is generated. The high-pressure compressed air is discharged and supplied from the discharge chamber of the cylinder head 18 to the one tank 1 via the discharge pipe 20 and also to the other tank 1 via the supply pipe 24. It is stored in the tank 1.

  Further, when supplying the compressed air in each tank 1 to an external air compressor or the like, with the external ports connected to the supply ports 25, 26, the supply ports 25, 26 are opened and closed by valves to external pneumatic equipment Supply compressed air to

  Thus, according to the present embodiment, a pair of tanks 1 and 1 formed as a cylindrical sealed container are integrally connected via the frames 3 and 4 so that the tanks 1 are separated to the left and right. The electric motor 8 and the compressor main body 12 are mounted on the frames 3 and 4 and the motor casing 9 and the crankcase 13 integrated with each other are mounted between the tanks 1. Since it is configured to extend in the same direction as the tank 1, the following effects can be obtained.

  That is, the motor casing 9 and the crankcase 13 are installed between the tanks 1 and 1 separated from each other to the left and right, and the lower portions 9A and 13A are partially inserted between the tanks 1 through the frames 3 and 4. In addition, the overall height of the compressor can be reduced and compactly formed. A cooling fan 11 that is positioned between the tanks 1 and is rotated by the rotating shaft 10 of the electric motor 8 can be disposed with sufficient margin on the end portion side of the crankcase 13, so that the space between the tanks 1 can be effectively used. The blade diameter of the cooling fan 11 can be increased as much as possible, and a large amount of cooling air can be generated by the cooling fan 11 so that the inside and outside of the crankcase 13 and the motor casing 9 can be efficiently cooled.

  Further, the compressor main body 12 is provided with low pressure side and high pressure side cylinders 14 and 17 so as to protrude horizontally from the crankcase 13 onto the left and right tanks 1 and 1, and the tips of the cylinders 14 and 17 are provided. Since the cylinder heads 15 and 18 are integrally provided on the side, a horizontally opposed two-stage air compressor composed of the crankcase 13, the cylinders 14 and 17, and the cylinder heads 15 and 18 is provided on each tank 1. The cylinder heads 15 and 18 on the low-pressure side and the high-pressure side can be prevented from protruding from the tanks 1 to the left and right, and each tank 1 and the compressor main body 12 are included. The overall width (left-right direction) dimension can be reduced.

  Therefore, according to this embodiment, the entire compressor can be reduced in size and compactly formed, the occupied space during transportation can be reduced, and the carrying work at the work site can be easily performed. The application range as a portable compressor can be greatly expanded.

  In the above-described embodiment, the case where it is used as a two-stage air compressor has been described as an example. However, the present invention is not limited to this. For example, a tank-integrated single-cylinder air compressor or three or more cylinders is used. It may be applied to a multistage air compressor. Furthermore, the present invention is not limited to an air compressor, and may be used to compress various fluids such as nitrogen gas and refrigerant.

DESCRIPTION OF SYMBOLS 1 Storage tank 2 Protective cover 3, 4 Frame 6 Handle 8 Electric motor (drive motor)
DESCRIPTION OF SYMBOLS 9 Motor casing 10 Rotating shaft 11 Cooling fan 12 Compressor main body 13 Crankcase 14 Low pressure side cylinders 15 and 18 Cylinder head 17 High pressure side cylinder 19 Communication pipe 20 Discharge pipe 24 Supply pipe

Claims (4)

A pair of cylindrical storage tanks that are spaced apart left and right and extend in parallel to each other and store compressed fluid ;
An electric motor having a rotary shaft extending in the axial direction in the same direction of the respective storage tank,
A crankcase having a crankshaft that rotates integrally with the rotating shaft of the electric motor;
Wherein provided on the storage tank, is constructed from a high pressure side cylinder and the low pressure side cylinder with each cylinder head to the tip, the piston of the two cylinders mounted to the crankcase Ru is driven by the electric motor is reciprocated A compressor body for compressing fluid sucked from outside,
A cooling fan that extends through the crankcase in the axial direction and is arranged at the tip of the rotating shaft of the electric motor protruding from the crankcase, and generates cooling air along the length of the storage tank;
A communication pipe for supplying the compressed fluid generated in the low pressure side cylinder to the high pressure side cylinder,
The rotating shaft of the electric motor is disposed above the space between the pair of storage tanks,
The high-pressure side cylinder and the low-pressure side cylinder are disposed so as to face each other in the horizontal direction across the crankcase, and intersect the axial direction of each storage tank and the cylinder head protrudes from the storage tank. no way extends horizontally, the tank-integrated compressor comprising a structure arranged above the storage tank. 2. The tank-integrated compressor according to claim 1, wherein the pair of storage tanks and the electric motor have a substantially equilateral triangular arrangement relationship. 2. The tank-integrated compressor according to claim 1, wherein the electric motor is provided in a state where at least a lower side enters between the storage tanks. The tank integrated compressor according to claim 3, wherein the cooling fan is arranged on the storage tank so that a part of the cooling fan enters between the storage tanks.

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