JP7011978B2 - Gas compressor - Google Patents

Description

The present invention relates to a gas compressor equipped with an air-cooled heat exchanger.

Gas compressors that compress air and gas are known. Since a gas compressor generates heat by the compression action of gas, a configuration in which the lubricating oil and water that lubricate and cool the compressed gas, the compressor body, and the bearings that compose it are cooled by an air-cooled heat exchanger, etc. Has.

The amount of heat generated and the required cooling capacity vary depending on the specifications of the compressor. For this reason, a rated cooling fan device is placed for each required air volume, the number of rotations of the cooling fan device can be changed, the size of the heat exchanger can be changed, and the cooling object (gas / lubricating oil (gas / lubricating oil)) flowing into the heat exchanger can be changed. Various techniques such as controlling the amount of water) are known.

For example, Patent Document 1 is a refueling type air compressor, in which an oil recovery device that separates air and oil from the compressed air discharged by the compressor body and an air cooling type that cools the oil recovered by this oil recovery device. It is equipped with a heat exchanger, an on-off valve that limits the inflow of oil between the oil recovery device and the heat exchanger, and a temperature detecting means for detecting the temperature of the oil. Disclosed is a configuration in which the on-off valve is opened and closed according to the above conditions to control the cooling temperature of the oil.

Japanese Unexamined Patent Publication No. 2012-11268

By the way, as described above, the cooling capacity of the heat exchanger of the gas compressor differs depending on the specifications, such as the calorific value and the required cooling capacity. There is a cost disadvantage such as an increase in the number of parts. Similarly, changing the rating of the motor that drives the fan device or installing a variable speed device according to each specification has the disadvantage of complicating control in addition to cost.
A technology that can easily realize the range of heat exchangers that can be commonly used for each specification is desired.

In order to solve the above problems, for example, the configuration described in the claims is applied. That is , a drive source, a compressor main body that sucks gas by the driving force from the drive source and discharges the compressed gas, and a compressed gas that is arranged in a pipe downstream from the compressor main body and flows through the compressor main body. A gas compressor including an air-cooled heat exchanger that cools at least one of the lubricating media and a fan device that generates cooling air, upstream and downstream of the flow of cooling air flowing through the heat exchanger. One side of the plurality of plate-shaped members in the lateral direction so that the plurality of plate-shaped members arranged on at least one of them and the plurality of plate-shaped members rotate in the flow direction of the cooling air due to the wind pressure of the cooling air. It is configured to include a plurality of rotation mechanisms that support each of the portions, and a plurality of urging members that each apply an urging force to the plurality of plate-shaped members in a direction opposite to the flow direction of the cooling air .

According to the present invention, it is possible to realize a required cooling capacity different for each specification with a simple configuration. That is, a heat exchanger having a certain body shape can be applied in common to a plurality of specifications, and the number of parts can be reduced.
Other problems, configurations, and effects of the present invention will be clarified from the following description.

It is a schematic diagram which shows the structure of the refueling type compressor according to Example 1 to which this invention was applied. It is a perspective view which shows typically the structure of the shielding member by Example 1. FIG. It is a figure which shows typically the structure by the modification of Example 1. FIG. It is a schematic diagram which shows the structure by Example 2 to which this invention was applied. It is a schematic diagram which shows the structure by Example 3 to which this invention was applied.

The embodiment for carrying out the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of a refueling type air compressor 100 (hereinafter, may be referred to as “compressor 100”) according to the first embodiment to which the present invention is applied.
The compressor 100 includes an electric motor 1, a compressor main body 2, a gas-liquid separator 3, an electromagnetic three-way valve 4, an air cooler 5, an oil cooler 6, discharge pipes 7a / 7b, lubricating oil pipes 8a / 8b, bypass pipes 9, and a shielding member. 10. The fan device 21 is mainly provided, and these are housed in the package housing 18.

The electric motor 1 is a drive source that shares rotational power with the compressor main body 2. In this embodiment, an electric motor is taken as an example, but another drive source such as an internal combustion engine may be used. In this embodiment, the motor 1 is connected to the compressor main body 2 with the same axis, but it may be connected via a belt or a gear.

The compressor body 1 has a positive displacement type (screw type, scroll type, reciprocating type, vane type, claw type, etc.) or centrifugal type (turbo) compression mechanism. In this embodiment, the compressor main body 1 is a refueling type that compresses the air sucked through the air filter 13 together with the lubricating oil supplied to the compression operating chamber, and discharges the compressed air of the gas-liquid mixture to the discharge pipe 7a. It has a compression mechanism. The present invention is not limited to this, and can be applied even to a non-lubricated compressor main body. Further, the water supply type may be used in which the liquid to be supplied is water.

The gas-liquid separator 3 has a swirl-type or collision-type gas-liquid separation mechanism, and separates air and oil from the compressed air of the gas-liquid mixture discharged by the compressor main body 2. The separated air flows to the discharge pipe 7b, and the separated oil stored in the bottom flows to the lubricating oil pipe 8a or the bypass pipe 9 via the electromagnetic three-way valve 4.

The electromagnetic three-way valve 4 is a detection value of an air temperature sensor (not shown) arranged in the discharge pipes 7a, 7b or both, an oil temperature sensor (not shown) arranged in the lubricating oil pipes 8a, 8b, or both. The flow of the lubricating oil from the gas-liquid separator 3 is switched to the lubricating oil pipe 8a or the bypass pipe 9 based on the above. For example, when the detected value of the air temperature sensor or the oil temperature sensor is higher than the predetermined temperature, the electromagnetic three-way valve 4 permits the flow of lubricating oil to the lubricating oil pipe 8a and cools it with an oil cooler described later. Further, when the temperature is lower than the predetermined temperature, the electromagnetic three-way valve 4 allows the flow of lubricating oil to the bypass pipe 9 to prevent supercooling.

The air cooler 5 and the oil cooler 6 are heat exchangers, which are cooling devices that exchange heat between the cooling air generated by the fan device 21 and the compressed air or lubricating oil circulating inside. The air cooler 5 and the oil cooler 6 are arranged so as to overlap each other in the flow direction of the cooling air (in this example, the oil cooler 6 is upstream of the cooling air), and the cooling air flowing through one flows into the other. ing.

The fan device 21 includes various types of rotary blades such as a turbo type and a propeller type, and an electric motor for driving the rotary blades. By driving the fan device 21, a flow of cooling air from the intake port 19 to the exhaust port 20 is generated inside the package housing 18. The outside air flowing in from the intake port 19 cools the motor 1 and the compressor main body 2, and after that, the air cooler 5 and the oil cooler 6 are circulated, and then the outside air flows out from the exhaust port 20 to the outside of the housing.

The duct 15 is an air duct having a tubular shape, and includes an air cooler 5 and an oil cooler 6 to guide the cooling air so that it can easily flow through them. In this embodiment, the fan device 21, the oil cooler 6, and the air cooler 5 are arranged in this order from the upstream in the duct 15 with respect to the flow direction of the cooling air. It is not limited to the configuration.

Next, the shielding member 10 which is one of the features of this embodiment will be described.
In this embodiment, a plurality of shielding members 10 are arranged. As the material of the shielding member 10, various materials such as metal, wood, resin, and rubber can be applied. The shielding member 10 is arranged in the vicinity of the cooling air outlet side of the air cooler 5 in the flow direction of the cooling air. The shielding member 10 covers the entire surface or a part of the cooling air outlet surface of the air cooler 5, so that the flow rate of the cooling air flowing through the air cooler 5 and the oil cooler 6 can be controlled. In this embodiment, the three shielding members 10 are arranged so that the surface direction faces the cooling air outlet surface of the air cooler 5.

One side of each shielding member 10 is fixedly connected to a rotation mechanism such as a hinge, and is vertically (90 °) or more angled (180 °) from a horizontal state (0 °) with the cooling air outlet surface of the air cooler 5. It is rotatable within the range of. That is, the shielding member 10 is in a state where it can be tilted between the horizontal and vertical directions with the flow direction of the cooling air flowing through the air cooler 5 and the oil cooler 6.

FIG. 2 schematically shows a perspective view of the shielding member 10. FIG. 2A shows the perspective appearance of one shielding member 10 and a part of the cooling air outlet surface by the air cooler 5. In the figure, the longitudinal direction of the shielding member 10 made of a rectangular parallelepiped plate-shaped member is the depth direction of the cooling outlet surface of the air cooler 5, and has substantially the same length. The side surface 10b in the lateral direction of the shielding member 10 is provided with a support portion 11 for rotation at any portion on the side surface 10a in the longitudinal direction from the center in the lateral direction. The support portion 11 is, for example, a convex portion or a concave portion extending in the longitudinal direction. The shielding member 10 is arranged inside the duct 15 and is combined with the rectangular frame body 12 that supports the shielding member 10 or the inner wall of the duct 15 with bolts, pins, or the like, so that the cooling air flow direction with the supporting portion 11 as a fulcrum. It is designed to rotate in the direction opposite to that of the air cooler 5 (see FIG. 2 (b)).

Further, the shielding member 10 rotates in the flow direction due to the wind pressure of the cooling air. More specifically, when the wind pressure exceeds the own weight of the shielding member 10, the rotation angle thereof changes according to the wind pressure. In other words, if the wind pressure of the cooling air generated by the fan device 10 is high, the rotation angle is large, and if it is low, the rotation angle is small. That is, the amount of cooling air flowing through the air cooler 5 and the oil cooler 6 can be controlled.

This has the following effects.
First, it is possible to control the cooling capacity of the air cooler 5 and the oil cooler 6 according to the rotation speed of the fan device 21. For example, in the case of compressors having different rated discharge capacities, the calorific value and the required cooling performance are different. In such a case, it is necessary to prepare the size of the air cooler 5 and the oil cooler 6 according to the required cooling capacity and the rated discharge capacity. Further, depending on the installation environment of the compressor, the temperature of the suction air may be high or low. If the specifications are such that the ambient temperature can be adjusted from 0 ° C to 45 ° C, and the ambient temperature exceeds or falls below this, there is a risk of insufficient cooling or supercooling.

According to this embodiment, since the cooling capacity of each cooler can be controlled by the shielding member 10, coolers having the same specifications can be applied to compressors with different rated outputs, and the effect of reducing the number of parts can be obtained. .. That is, even if a cooler larger than the cooling capacity required for the rated discharge capacity is installed, the shielding member 10 cools the temperature within the required cooling capacity, and it is possible to prevent supercooling. On the contrary, in the case of a compressor having a rated discharge capacity commensurate with the required cooling capacity, the shielding member 10 can be fully opened to prevent insufficient cooling.

When the ambient temperature is high or low, the required cooling capacity can be adjusted by increasing or decreasing the number and weight of the shielding members 10.

Secondly, when there is no cooling air (such as when the compressor 100 is stopped or temporarily stopped), the shielding member 10 is in a closed state (a state in a substantially horizontal direction) and is viewed from the downstream side. It can be a cover for dust and the like.

Although the first embodiment for carrying out the present invention has been described above, the present invention is not limited to the above examples, and various modifications can be made within the scope of the purpose.

For example, in the first embodiment, the air cooler 5 and the oil cooler 6 are arranged in an overlapping manner along the flow direction of the cooling air, but as shown in FIG. 3 ( b ), they are arranged in parallel in the horizontal direction. There may be. Further, as shown in FIG. 3A , one fan device 21 may be arranged for each cooler. In this case, the shielding member 10 may be arranged only on one cooler, or the shielding member 10 may be arranged on both coolers so that the number and weight thereof are different.

Further, in the first embodiment, a plurality of shielding members 10 are arranged, but the shielding member 10 may be configured to cover the cooling air outlet surface of each cooler.
Further, when a plurality of shielding members 10 are arranged , the size and weight of each shielding member 10 may be different (including a weight change due to the adoption of different materials).

Although the first embodiment uses a package-type compressor that uses the package housing 18 as an example, it is not an essential component of the present invention and can be applied to a compressor that does not use a package. Similarly, the duct 15 is not an essential component of the invention and its use is optional.

In the second embodiment, the position where the shielding member 10 is arranged with respect to the flow direction of the cooling air is mainly different from that of the first embodiment. This will be described below with reference to the drawings. The same reference numerals may be used for the same components, and detailed description may be omitted.

FIG. 4 schematically shows the arrangement configuration of the cooler, the fan device, and the shielding member 10 of the compressor 100 according to the second embodiment. One of the features of the second embodiment is that the shielding member 10 is arranged on the upstream side of the fan device 21 with respect to the flow direction of the cooling air.

The drive of the fan device 21 generates a flow of suction from the duct 15, and the shielding member 10 can control the amount of cooling air sucked. That is, each shielding member 10 rotates toward the fan device 21 according to the suction flow, the amount of cooling air flowing through the air cooler 5 and the oil cooler 6 changes, and the cooling capacity of each cooler is controlled.
As described above, even with the configuration of the second embodiment, the effect of the first embodiment can be obtained.

The third embodiment is based on the configuration of the first embodiment, and is characterized in that the shielding member 10 further includes an urging member 50 that imparts an urging force in a direction opposite to the flow direction of the cooling air. Hereinafter, it will be described with reference to the drawings. It should be noted that the same components as those in Examples 1 and 2 may use the same reference numerals, and detailed description thereof may be omitted.

FIG. 5 schematically shows the arrangement configuration of the cooler, the fan device, the shielding member 10, and the urging member 50 of the compressor 100 according to the third embodiment. The urging member 50 is made of, for example, an elastic body such as a spring or rubber, and when the shielding member 10 rotates by a predetermined angle or more, a force for pulling back the shielding member 10 in the horizontal direction is generated. ing. Both ends of the urging member 50 are connected to a portion separated from the support portion 11 and the support frame body 12 on the lateral side surface 10a of the shielding member 50.

According to the third embodiment, the following effects can be obtained in addition to the effects of the first and second embodiments.
First, by the action of the urging member 50, it is possible to control the amount of cooling air equal to or greater than the weight of the shielding member 50. As a result, the range that can meet the required cooling capacity can be expanded with the same cooler.

Further, in the case of the configuration in which the shielding member 50 is arranged in the vertical direction (the posture in which the side surface 10a in the longitudinal direction faces the vertical direction), the shielding member 50 can be returned to the closing direction when the compressor 100 is stopped, and dust can be obtained. It can function as a cover to prevent the intrusion of such things.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-mentioned various configurations, such as replacing the components of one embodiment with other embodiments.

1 ... Electric motor, 2 ... Compressor body, 3 ... Gas-liquid separator, 4 ... Electromagnetic three-way valve, 5 ... Air cooler, 6 ... Oil cooler, 7a / 7b ... Discharge pipe, 8a / 8b ... Lubricating oil pipe, 9 ... Bypass Piping, 10 ... Shielding member (plate-shaped member) , 10a ... Longitudinal side surface, 10b ... Short side side, 11 ... Support part, 12 ... Support frame, 13 ... Air filter, 15 ... Duct, 17 ... Oil filter, 18 ... package housing, 19 ... intake port, 20 ... exhaust port, 21 ... fan device, 50 ... urging member, 100 ... refueling compressor

Claims (1)

A drive source, a compressor body that sucks gas with the driving force from the drive source and discharges the compressed gas, and a compressed gas or a lubricating medium that is arranged in a pipe downstream from the compressor body and flows through the compressor body. A gas compressor equipped with an air-cooled heat exchanger that cools at least one of the above and a fan device that generates cooling air .
A plurality of plate-shaped members arranged at least one of the upstream and the downstream of the flow of the cooling air flowing through the heat exchanger.
A plurality of rotation mechanisms that support one side portion in the lateral direction of the plurality of plate-shaped members so that the plurality of plate-shaped members rotate in the flow direction of the cooling air due to the wind pressure of the cooling air.
A gas compressor including a plurality of urging members that each apply an urging force to the plurality of plate-shaped members in a direction opposite to the flow direction of the cooling air .

Images