JP2016037858A - Engine generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engine generator capable of prolonging a maintenance interval by reducing replacement parts.SOLUTION: In an engine generator, a rotating shaft 361 of a radiator fan 360 is directly connected to a crankshaft 305. Thereby, a fan belt can be dispensed with, and periodical replacement of the fan belt is not required, and a maintenance interval can be prolonged. A portion higher than a topmost portion of a water jacket of a cylinder head is provided on a radiator pedestal 900 for supporting a radiator 330, and a filler cap 390 for opening and closing supply piping 380 communicated with the radiator 330 is provided in the portion. Thus, water can be supplied by removing the filler cap 390. That is, the water can be supplied by directly connecting the rotating shaft 361 of the radiator fan 360 to the crankshaft 305 even when an upper end position of the radiator 330 is low.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an engine generator that generates power using an engine as a power source. In particular, the present invention relates to measures for reducing replacement parts.

  Conventionally, an engine generator that generates power using an engine as a power source is known (for example, Patent Document 1). This engine generator is configured to support a generator, an engine, a radiator, and the like on a common platform.

  By the way, in an engine generator, it is desired to extend the maintenance interval of the engine. One countermeasure is to reduce the number of replacement parts (parts that require regular replacement). In particular, since rubber parts wear and deteriorate with long-term use, they must be replaced regularly. For this reason, reducing this type of component is effective in prolonging the maintenance interval.

JP 2004-270454 A

  However, Patent Document 1 does not disclose any measures for reducing replacement parts. For this reason, there is room for improvement in order to extend the maintenance interval.

  Therefore, an object of the present invention is to provide an engine generator capable of extending the maintenance interval by reducing replacement parts.

  The present invention is characterized in that in the engine generator in which the generator, the engine, and the radiator are arranged in series in a direction along the axis of the crankshaft of the engine, a radiator fan is directly connected to the crankshaft.

  According to the present invention, a fan belt for transmitting the rotational force of the crankshaft to the radiator fan becomes unnecessary. For this reason, it is not necessary to periodically replace the fan belt, and the maintenance interval can be extended by reducing the number of replacement parts.

  Further, the upper end position of the radiator is lower than the topmost part of the engine cooling water flow path, and a portion that is higher than the topmost part of the engine cooling water flow path is provided on the radiator mount that supports the radiator. In addition, it is preferable to provide a filler cap that opens and closes a replenishment water channel connected to the radiator.

  As described above, when the radiator fan is directly connected to the crankshaft, the position of the radiator fan is also restricted as the position of the radiator fan (particularly the height position) is restricted by the position of the crankshaft. . For this reason, the upper end position of the radiator may be lower than the topmost part of the engine coolant flow path. In this case, water supply from an existing water supply port provided at the upper end of the radiator becomes impossible due to a water head difference. On the other hand, the radiator mount is provided with a portion higher than the topmost part of the engine cooling water flow path, and the filler cap that opens and closes the replenishment water channel connected to the radiator is provided at that portion. Water supply. That is, according to this configuration, even when the upper end position of the radiator is lowered by connecting the radiator fan directly to the crankshaft, water can be supplied to the radiator.

  In the present invention, since the radiator fan is directly connected to the crankshaft, no fan belt is required. For this reason, the maintenance interval can be prolonged by reducing the number of replacement parts.

It is a front view of the engine generator concerning an embodiment. It is a rear view of the engine generator concerning an embodiment. It is a top view of the engine generator concerning an embodiment. It is a right view of the engine generator which concerns on embodiment. It is a left view of the engine generator which concerns on embodiment. It is a perspective view which shows the cooling system of an engine. It is a side view which shows the connection part of a crankshaft and a radiator fan, and its peripheral part. It is a perspective view which shows the support structure of the radiator by the stand for radiators.

  Hereinafter, an engine generator according to an embodiment of the present invention will be described with reference to the drawings. Generally, the engine generator is housed in a package. In the present embodiment, an engine generator in a state before being housed in a package will be described. The present invention can also be applied to an engine generator that is installed without being housed in a package.

  1 to 5 show an engine generator 100 according to the present embodiment. FIG. 1 is a front view. FIG. 2 is a rear view. FIG. 3 is a plan view. 4 is a right side view (viewed from the direction of arrow R in FIG. 1). FIG. 5 is a left side view (a view seen from the direction of arrow L in FIG. 1).

  Below, let the longitudinal direction (left-right direction of FIG. 1) of the engine generator 100 be an X direction. The depth direction of the engine generator 100 (the vertical direction in FIG. 3) is defined as the Y direction. Further, the height direction of the engine generator 100 is defined as the Z direction. In the longitudinal direction, the left side of FIG. 1 is called the X1 direction, and the right side of FIG. 1 is called the X2 direction. In the depth direction, the back side in FIG. 1 (upper side in FIG. 3) is referred to as Y1 direction, and the front side in FIG. 1 (lower side in FIG. 3) is referred to as Y2 direction. The upper side in the height direction is called the Z1 direction, and the lower side is called the Z2 direction.

  The engine generator 100 has a configuration in which an engine 300, a generator 400, a control panel 500, and the like are mounted on a common platform (base) 200. The common bed 200 is configured by welding a plurality of channel steels and the like. The engine 300 is arranged from the X-direction center position on the common platform 200 to the X2 direction side. The generator 400 is disposed on the X1 direction side of the position where the engine 300 is disposed. Further, the control panel 500 is arranged on the Y2 direction side (the front side of the engine generator 100) from the arrangement position of the generator 400. Hereinafter, each component device of the engine generator 100 will be described.

(Generator)
The generator 400 is elastically supported on the common platform 200 by a generator mount 401 (see FIG. 5). The generator 400 is configured such that a rotor is rotatably supported inside a stator (not shown), and a crankshaft extending from the engine 300 is connected to the rotor. Thus, as the engine 300 is operated, the rotor receives the rotational force of the crankshaft to generate power. The electric power generated by the generator 400 is supplied to an arbitrary electric system.

(engine)
The engine 300 is a gas engine that generates power using fuel gas such as natural gas. The engine 300 is elastically supported on the common platform 200 by an engine mount 301 (see FIG. 1). The engine 300 includes a cylinder block 302, a cylinder head 303 attached to the upper part of the cylinder block 302, and an oil pan 304 attached to the lower part of the cylinder block 302.

  Hereinafter, the intake / exhaust system, fuel supply system, cooling system, and lubrication system of engine 300 will be briefly described.

  The intake / exhaust system includes an air cleaner 310, an intake pipe 311, a mixer 312, a throttle valve (not shown), an intake manifold 313, an exhaust manifold 314, an exhaust silencer 316, and the like.

  The air cleaner 310 and the intake pipe 311 are disposed on the X1 direction side (the side where the generator 400 is disposed) from the cylinder head 303. The mixer 312, the throttle valve, and the intake manifold 313 are arranged on the Y2 direction side (front side of the engine generator 100) from the cylinder head 303. The exhaust manifold 314 and the exhaust silencer 316 are arranged on the Y1 direction side (the back side of the engine generator 100) from the cylinder head 303.

  Air purified from the air cleaner 310 reaches the mixer 312 through the intake pipe 311. In the mixer 312, fuel gas introduced from a fuel supply system described later and air are mixed to generate an air-fuel mixture. The air-fuel mixture whose flow rate is adjusted by the throttle valve flows into each cylinder of the engine 300 through the intake manifold 313. When the air-fuel mixture burns in each cylinder, a rotational force is generated in the crankshaft 305, and an output for operating the generator 400 is obtained. The exhaust gas after combustion is discharged through an exhaust manifold 314 and an exhaust silencer 316. Reference numeral 350 in the drawing is a spark plug for igniting the air-fuel mixture flowing into the cylinder.

  The fuel supply system includes an inlet pipe 320, a regulator 321, a fuel introduction pipe 322, and the like.

  The inlet pipe 320, the regulator 321 and the fuel introduction pipe 322 are disposed on the Y2 direction side of the cylinder block 302 and the oil pan 304.

  Fuel gas introduced into the inlet pipe 320 from a fuel gas supply source (not shown) is regulated by the regulator 321. The fuel gas reaches the mixer 312 through the fuel introduction pipe 322, and is mixed with the air flowing through the intake system.

  As shown in FIG. 6, the cooling system includes a radiator 330, a water pump 331, cooling water pipes 332 to 335, and the like.

  The radiator 330 is disposed on the X2 direction side of the cylinder block 302 (the side opposite to the side on which the generator 400 is disposed). The water pump 331 is disposed closer to the Y1 direction than the radiator 330.

  The upper tank 336 of the radiator 330 communicates with the water jacket of the cylinder head 303 through an upper pipe 332. The lower tank 337 of the radiator 330 communicates with the suction port of the water pump 331 through the lower pipe 333. The connection position of the lower pipe 333 with respect to the lower tank 337 is the end of the lower tank 337 on the Y2 direction side. As described above, the water pump 331 is disposed on the Y1 direction side of the radiator 330. For this reason, the lower piping 333 communicates the lower tank 337 and the suction port of the water pump 331 by passing the lower side of the engine 300 along the Y direction.

  The discharge port of the water pump 331 communicates with the water jacket of the cylinder block 302 through a discharge pipe 334. The upper pipe 332 is provided with a thermostat valve 338, and the thermostat valve 338 and the lower pipe 333 are connected by a bypass pipe 335.

  The water pump 331 is an electric type. The water pump 331 may be a mechanical type that operates by receiving the rotational force of the crankshaft 305.

  When the engine 300 is cold, the cooling water discharged from the water pump 331 circulates through the discharge pipe 334, the water jacket of the cylinder block 302, the water jacket of the cylinder head 303, the thermostat valve 338, and the bypass pipe 335. That is, the coolant circulates bypassing the radiator 330.

  On the other hand, when the engine 300 is warm, the cooling water discharged from the water pump 331 is discharged from the discharge pipe 334, the water jacket of the cylinder block 302, the water jacket of the cylinder head 303, the thermostat valve 338, the upper pipe 332, the radiator 330, the lower Circulate the pipe 333. That is, the heat recovered from the engine 300 is radiated to the outside by the radiator 330, and the engine 300 is cooled.

  The lubrication system supplies the lubricating oil stored in the oil pan 304 to each part of the engine, and lubricates and cools these parts. For this reason, the lubrication system is provided with an oil pump 340 (see FIGS. 1 and 3), an oil supply path (not shown), an oil filter 341, and the like.

  The oil pump 340 operates in response to the rotational force of the crankshaft 305, pumps up the lubricating oil stored in the oil pan 304, and pumps the lubricating oil toward each part of the engine through the oil supply path. Lubricating oil that has lubricated and cooled each part of the engine is recovered by flowing down to the oil pan 304. The oil pump 340 may be an electric type.

  As shown in FIGS. 2 and 3, the lubrication system is provided with a sub oil tank 601, a main oil tank 602, an oil pipe 603, and a replenishment oil pump 604. The sub oil tank 601 and the main oil tank 602 store lubricating oil for replenishing the oil pan 304.

  The sub oil tank 601 is at the same height as the oil pan 304 and is disposed on the Y1 direction side of the oil pan 304 and the generator 400. The sub oil tank 601 is elastically supported on the common floor 200 by support brackets 601c and 601d (see FIG. 2).

  The sub oil tank 601 is communicated with the oil pan 304 through a communication pipe 605. That is, the sub oil tank 601 is always in communication with the oil pan 304.

  The sub oil tank 601 is provided with an oil level sensor 606. When the oil level sensor 606 detects that the oil level in the sub oil tank 601 has decreased to a predetermined height, the oil level sensor 606 transmits a detection signal to the control device housed in the control panel 500. The predetermined height is the height of the oil level at which the sub oil tank 601 and the oil pan 304 need to be replenished with lubricating oil, and is set in advance through experiments and simulations.

  On the other hand, the main oil tank 602 is disposed above the sub oil tank 601 and closer to the Y1 direction than the generator 400.

  The main oil tank 602 is a substantially rectangular parallelepiped container. Further, the main oil tank 602 is supported by a tank mount 700 erected on the common bed 200. Incidentally, reference numeral 607 in the figure is an oil level gauge for confirming the remaining amount of lubricating oil in the main oil tank 602.

  The oil pipe 603 has one end connected to the main oil tank 602 and the other end connected to the sub oil tank 601. Specifically, one end of the oil pipe 603 passes through the upper surface of the main oil tank 602 and extends to the bottom inside the main oil tank 602. The other end of the oil pipe 603 is connected to the upper surface of the sub oil tank 601.

  The replenishment oil pump 604 is disposed in the middle of the oil pipe 603. The replenishment oil pump 604 operates when the oil level in the sub oil tank 601 detected by the oil level sensor 606 has dropped to a predetermined height. By the operation of the replenishing oil pump 604, the lubricating oil in the main oil tank 602 is pumped into the sub oil tank 601 through the oil pipe 603. As a result, lubricating oil is supplied to the sub oil tank 601 and the oil pan 304. Further, during the lubricating oil supply operation, when the oil level in the sub oil tank 601 detected by the oil level sensor 606 rises to a predetermined height, the supply oil pump 604 stops. Thereby, the supply of the lubricating oil to the sub oil tank 601 and the oil pan 304 is completed.

  As described above, the lubricating oil for replenishing the oil pan 304 can be stored in the sub oil tank 601 and the main oil tank 602 in the lubrication system of the engine generator 100 according to the present embodiment. For this reason, the amount of lubricant can be increased, and the maintenance interval of engine 300 can be extended. The sub oil tank 601 is provided from the side of the oil pan 304 (Y1 direction side) to the side of the generator 400 (Y1 direction side), and the main oil tank 602 is located above the sub oil tank 601. And it is provided on the side (Y1 direction side) of the generator 400. For this reason, the oil tanks 601 and 602 do not cover the sides of the cylinder block 302 and the cylinder head 303 of the engine 300. As a result, when the engine 300 is maintained, the oil tanks 601 and 602 do not become obstacles, and the provision of the oil tanks 601 and 602 does not deteriorate the maintenance workability.

(control panel)
The control panel 500 constituting the control system houses various electronic devices (circuit boards and the like) constituting a control device for controlling the operation of each component device of the engine generator 100. Specifically, operation control of the engine 300, operation control of the generator 400, control of the water pump 331, and the like are performed by this control device.

  In addition, on the front surface of the control panel 500 (surface facing the Y2 direction), various switches for operation by the operator and various meters are provided.

  Further, as various sensors that transmit a detection signal to the control device, a crank angle sensor that transmits a pulse signal every time the crankshaft 305 rotates by a predetermined rotation angle, a water temperature sensor that detects the temperature of cooling water flowing through the cooling system, An oil temperature sensor for detecting the temperature of the lubricating oil flowing through the lubricating system is provided. Detection signals from these sensors are transmitted to the control device.

  The dimension in the X direction in the control panel 500 (the dimension in the direction along the axis of the generator 400) is configured to be within the dimension in the X direction in the generator 400. Specifically, as shown in FIG. 3, the end portion on the X1 direction side of the control panel 500 is positioned slightly on the X2 direction side than the end portion on the X1 direction side of the generator. Further, the end portion on the X2 direction side of the control panel is located slightly on the X1 direction side than the end portion on the X2 direction side of the generator. That is, the dimension in the X direction of the control panel 500 is set so that the control panel 500 does not cover the side of the engine 300.

  According to this configuration, when the engine 300 is maintained, the control panel 500 does not become an obstacle, and the maintenance workability is good.

  Further, an air cleaner base 800 is suspended between the tank base 700 and the control panel 500. An air cleaner 310 is disposed on the air cleaner base 800.

(Features of radiator fan and cooling system)
Hereinafter, a configuration that characterizes the present embodiment will be described.

  As shown in FIG. 7, a radiator fan 360 is provided on the X1 direction side of the radiator 330 (shown in phantom in FIG. 7). And the rotating shaft 361 of this radiator fan 360 and the crankshaft 305 extended in the X2 direction side from the cylinder block 302 are directly connected. Specifically, in a state where the axis of the crankshaft 305 and the axis of the rotating shaft 361 of the radiator fan 360 are arranged on the same straight line, the radiator is placed on the tip portion (tip portion on the X2 direction side) of the crankshaft 305. A rotating shaft 361 of the fan 360 is connected integrally with a bolt (not shown). As described above, the engine generator 100 according to this embodiment includes the generator 400, the engine 300, and the radiator 330 arranged in series in the direction along the axis of the crankshaft 305 (X direction), and the rotating shaft of the radiator fan 360. 361 is directly connected to the crankshaft 305.

  The structure for connecting the crankshaft 305 and the rotating shaft 361 of the radiator fan 360 is not particularly limited. For example, a flange is provided on each of the rotation shafts 361 of the crankshaft 305 and the radiator fan 360, and these flanges are bolted together. As another connection structure, a connecting member is interposed between the crankshaft 305 and the rotating shaft 361 of the radiator fan 360, and the crankshaft 305 and the rotating shaft 361 of the radiator fan 360 are connected via this connecting member. It is good also as composition to do. For example, one bolt is inserted from the center portion of the connecting member to the center of the tip portion of the crankshaft 305 to connect the connecting member and the crankshaft 305, and are provided on the rotating shaft 361 of the radiator fan 360. A configuration in which a plurality of portions in the circumferential direction of the flange are bolted to the connecting member, and the like.

  The radiator 330 is arranged such that the center position thereof is located on the extension line of the axis of the rotation shaft 361 of the radiator fan 360. In addition, the upper end position of the radiator 330 (the position of the upper tank 336) is positioned slightly above the upper end position of the radiator fan 360. Further, the lower end position of the radiator 330 (the position of the lower tank 337) is located slightly below the lower end position of the radiator fan 360. This is because the size of the radiator 330 is designed so that the airflow generated by the rotation of the radiator fan 360 flows over substantially the entire radiator core, and the radiator 330 is not made larger than necessary. .

  When the size of the radiator 330 and the position of the radiator 330 are set as described above, the upper end position of the radiator 330 is relatively low as the rotating shaft 361 of the radiator fan 360 and the crankshaft 305 are directly connected as described above. May be a position. In this case, the upper end position of the radiator 330 may be lower than the topmost portion of the water jacket of the cylinder head 303. For example, in FIG. 7, the position L <b> 1 indicated by the alternate long and short dash line is the upper end position of the radiator 330, and the position L <b> 2 indicated by the alternate long and short dash line is the height position of the top of the water jacket of the cylinder head 303. In this case, water supply from an existing water supply port provided in the upper tank 336 becomes impossible due to the water head difference H.

  In other words, in the conventional configuration in which the fan belt is stretched between the crankshaft and the radiator fan to operate the radiator fan, it is not necessary to arrange the crankshaft and the rotating shaft of the radiator fan on the same straight line. Therefore, it is possible to arrange the radiator fan at a relatively high position. For this reason, a radiator can also be arrange | positioned in a comparatively high position. In this case, the upper end position of the radiator can be set to a position higher than the topmost part of the water jacket of the cylinder head, so that water can be supplied from the existing water supply port provided in the upper tank. However, as described above, when the rotating shaft 361 of the radiator fan 360 and the crankshaft 305 are directly connected, the upper end position of the radiator 330 is lower than the topmost portion of the water jacket of the cylinder head 303. In this case, as described above, it is impossible to supply water from the existing water supply port due to the water head difference H.

  In view of this point, the present embodiment has the following configuration so that water can be supplied to the radiator 330 even if the rotation shaft 361 of the radiator fan 360 and the crankshaft 305 are directly connected.

  In other words, the radiator mount 900 that supports the radiator 330 is provided with a portion higher than the topmost portion of the water jacket of the cylinder head 303, and a replenishment water channel (a replenishment piping 380 described later) connected to the radiator 330 is opened and closed at that portion. A filler cap 390 is provided. This will be specifically described below.

  As shown in FIGS. 4, 6, and 8, the radiator base 900 includes two support members 902 and 903 and four bridge members 904 to 907 that connect the support members 902 and 903 to each other. The structure is integrally connected by a stopper or the like.

  Of the two support members 902 and 903, one support member 902 is on an edge located on the X2 direction side of the common platform 200, and is an edge located on the Y1 direction side of the common platform 200. Is set up at a position having a predetermined dimension. The other strut member 903 is erected on the edge located on the X2 direction side of the common platform 200 and at a position having a predetermined dimension from the edge located on the Y2 direction side of the common platform 200. ing. The spacing dimension in the Y direction between the support members 902 and 903 is substantially the same as the length dimension of the radiator 330 in the Y direction.

  Of the four bridging members 904 to 907, the bridging member 904 positioned on the lowermost side (Z2 direction side) is bolted to the lower ends of the column members 902 and 903, respectively. The lower ends of 902 and 903 are connected to each other. The bridging member 904 is bolted to an edge located on the X2 direction side of the common platform 200.

  Also, the bridging member 905 located second from the bottom is bolted at both ends to the upper positions having predetermined dimensions from the lower ends of the support members 902 and 903, thereby connecting the support members 902 and 903 together. doing. The bridging member 905 includes a radiator support plate 910 that extends in the horizontal direction (X1 direction) toward the position where the radiator fan 360 is disposed. A radiator 330 is placed on the radiator support plate 910, and the lower end of the radiator 330 is bolted to the radiator support plate 910. Thereby, the lower end of the radiator 330 is supported.

  Also, the bridging member 906 located second from the top is bolted at both ends to the lower positions having a predetermined dimension from the upper ends of the support members 902 and 903, thereby connecting the support members 902 and 903 to each other. It is connected. The bridging member 906 includes a radiator support plate 911 extending upward (in the Z1 direction). An upper portion of the radiator 330 is brought into contact with a side surface of the radiator support plate 911 facing the X1 direction, and the upper portion of the radiator 330 is bolted to the radiator support plate 911. Thereby, the upper part of the radiator 330 is supported.

  Both ends of the bridging member 907 positioned on the uppermost side (Z1 direction side) are bolted to the upper ends of the support members 902 and 903, respectively, thereby connecting the upper ends of the support members 902 and 903 to each other. .

  A first support bracket 920 and a second support bracket 930 are attached to the bridging member 907 located on the uppermost side.

  The first support bracket 920 is a member that supports a supply pipe 380 described later, and extends in the X direction. Further, the end portion on the X2 direction side of the first support bracket 920 is connected to a surface of the bridging member 907 facing the X1 direction side. Further, the end portion of the first support bracket 920 on the X1 direction side is connected to the upper pipe 332. The first support bracket 920 includes an upper end surface 921 extending in the horizontal direction.

  The second support bracket 930 is a member that supports the end of the supply pipe 380 on the X2 direction side. The second support bracket 930 includes a first horizontal portion 931 that extends in the horizontal direction and is bolted to the upper surface of the bridging member 907, and a vertical portion that extends vertically upward from an edge on the Y1 direction side of the first horizontal portion 931. 932 and a second horizontal portion 933 that extends from the upper end of the vertical portion 932 to the Y2 direction side and supports the end portion of the supply pipe 380 on the X2 direction side. The vertical dimension of the vertical part 932 is set so that the height position of the second horizontal part 933 is higher than the upper end of the cylinder head 303. Thereby, the height position of the second horizontal portion 933 is higher than the topmost portion of the water jacket of the cylinder head 303.

  The supply pipe 380 is disposed along the upper end surface 921 of the first support bracket 920, and the end on the X1 direction side is connected to the upper pipe 332. Specifically, as shown in FIG. 6, the upper pipe 332 includes a first horizontal portion 371 extending from the upper tank 336 of the radiator 330 in the X1 direction, and an upper end from the end of the first horizontal portion 371 on the X1 direction side. A first vertical portion 372 that extends, a second horizontal portion 373 that extends in the Y1 direction from the upper end of the first vertical portion 372, and a thermostat valve 338 that extends downward from the end of the second horizontal portion 373 on the Y1 direction side. And a second vertical portion 374 to be connected. An end of the supply pipe 380 on the X1 direction side is connected to a boundary portion between the first vertical part 372 and the second horizontal part 373, and the inside of the supply pipe 380 communicates with the inside of the upper pipe 332. ing. Since the upper pipe 332 is connected to the upper tank 336 of the radiator 330, the interior of the supply pipe 380 is in communication with the radiator 330.

  Further, the end portion on the X2 direction side of the supply pipe 380 faces vertically upward, and a flat mounting plate 381 is attached to the outer peripheral surface in the vicinity of the upper end position (see FIG. 8). The mounting plate 381 is bolted to the second horizontal portion 933 of the second support bracket 930. Accordingly, the end portion on the X2 direction side of the supply pipe 380 is supported by the second support bracket 930.

  A filler cap 390 is attached to an opening (opening facing upward) at the end of the supply pipe 380 on the X2 direction side. The filler cap 390 is removed from the replenishing pipe 380 when the cooling water in the cooling system is insufficient, and enables water supply from the replenishing pipe 380.

  The filler cap 390 is connected to the reserve tank 330a by a reserve hose 330b. The reserve tank 330a is supported by a tank holder 901. The tank holder 901 is attached to a column member 903 of the radiator base 900.

  When the amount of cooling water stored in the radiator 330 decreases and cooling water needs to be replenished (water supply), the filler cap 390 is removed from the refilling pipe 380, and the opening of the refilling pipe 380 is removed. Cooling water is supplied. As described above, the height position of the second horizontal portion 933 of the second support bracket 930 is higher than the topmost portion of the water jacket of the cylinder head 303. For this reason, the opening part of the replenishment piping 380 is also higher than the top part of the water jacket of the cylinder head 303. Therefore, due to this water head difference, when the filler cap 390 is removed, the cooling water does not overflow from the opening of the supply pipe 380, and water can be supplied.

  As described above, in this embodiment, since the rotating shaft 361 of the radiator fan 360 and the crankshaft 305 are directly connected, a fan belt for transmitting the rotational force of the crankshaft 305 to the radiator fan 360 becomes unnecessary. . For this reason, it is not necessary to periodically replace the fan belt, and the maintenance interval can be extended by reducing the number of replacement parts.

  In this embodiment, the radiator base 900 is provided with a portion higher than the topmost portion of the water jacket of the cylinder head 303, and the filler cap 390 that opens and closes the supply pipe 380 connected to the radiator 330 is provided in this portion. . As a result, the filler cap 390 is removed as described above, and water supply to the radiator 330 becomes possible. That is, according to the configuration of the present embodiment, even when the upper end position of the radiator 330 is lowered due to the direct connection between the rotating shaft 361 of the radiator fan 360 and the crankshaft 305, water supply to the radiator 330 is performed. Is possible.

  The present invention is not limited to the embodiment described above, and can be implemented in various other forms. Therefore, such an embodiment is merely an example in all respects and should not be interpreted in a limited manner. The scope of the present invention is indicated by the scope of claims, and is not restricted by the text of the specification. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  For example, in the embodiment described above, the engine 300 is a gas engine, but an engine using gasoline as fuel or an engine using light oil as fuel may be used.

  In addition, the engine generator 100 according to the present invention may be used as a cogeneration system that recovers and uses (utilizes for hot water supply, etc.) waste heat generated with power generation.

100 Engine generator 300 Engine 303 Cylinder head 305 Crankshaft (crankshaft)
330 Radiator 360 Radiator fan 361 Rotating shaft 380 Supply piping (Supply water channel)
390 Filler cap 400 Generator 900 Radiator mount 930 Second support bracket 933 Second horizontal portion

Claims (2)

In the engine generator in which the generator, the engine, and the radiator are arranged in series in a direction along the axis of the crankshaft of the engine,
An engine generator characterized in that a radiator fan is directly connected to the crankshaft. The engine generator according to claim 1, wherein
The upper end position of the radiator is lower than the topmost part of the engine coolant flow path,
An engine generator characterized in that a radiator base that supports the radiator is provided with a portion that is higher than the topmost portion of the engine cooling water flow path, and a filler cap that opens and closes a replenishment water channel connected to the radiator is provided in the portion. .

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