JP5042158B2 - Compressor - Google Patents

Description

  The present invention relates to a compressor.

In the compressor, a compressor main body, which is supported by a support member and a motor and a compression unit that is rotationally driven by the motor and compresses a fluid, is installed on a pedestal member via four vibration absorbing members. (For example, refer to Patent Document 1).
JP-A-5-231323

  By the way, when the size of the compressor is increased, for example, it is accompanied by an increase in weight, and there is a possibility that vibration cannot be sufficiently absorbed by the four vibration absorbing members as described above. Further, even when a change is made to extend the compressor in the height direction in order to suppress the installation area, there is a possibility that the vibration absorbing members at the four places as described above cannot sufficiently absorb the vibration. In particular, in the case of a reciprocating compressor, it is necessary to reduce the oscillation vibration in the centrifugal direction in the crankshaft direction at the start-up, and it is necessary to reduce the vertical vibration due to the reciprocating movement of the piston during steady operation. For this reason, these vibration countermeasures were indispensable when the size was increased.

  Accordingly, an object of the present invention is to provide a compressor capable of sufficiently suppressing vibration while saving space with a simple structure against an increase in weight or height.

  In order to achieve the above object, according to the present invention, a plurality of vibration absorbing members interposed between a support member and a pedestal member of a compressor body are expanded and contracted in the axial direction, and the axis orthogonal to the rotation axis of the compression unit is horizontal. And has an elastic member that is inclined so that the lower part is located on the center of gravity side of the compressor main body and the upper part is located on the opposite side of the center of gravity. 4 locations that are equidistant from the imaginary line passing through the center of gravity in the axial direction of the rotating shaft and a plurality of locations that are between the four locations in the axial direction of the rotating shaft on the circumference. Has been placed.

  According to the present invention, it is possible to sufficiently suppress vibration while saving space with a simple structure against an increase in weight or height.

Hereinafter, an embodiment according to the present invention will be described with reference to the drawings.
FIG. 1 is a front view showing a main configuration of a compressor according to the present embodiment, FIG. 2 is a diagram showing a vibration absorbing member of the compressor according to the present embodiment, and FIG. 3 is an arrangement of the vibration absorbing member of the compressor according to the present embodiment. FIG. 4 is a front view showing the overall configuration of the compressor of this embodiment.

  A compressor 11 of the present embodiment shown in FIG. 1 includes a substantially rectangular plate-like pedestal member 12 installed horizontally on a floor surface, a support member 13 installed on the pedestal member 12, and a support member 13. And a motor 15 installed on the support member 13 and a tank 16 installed on the support member 13.

  The support member 13 is disposed on a side of the longitudinal direction on the base 22 and a substantially rectangular plate-like base 22 horizontally disposed on the pedestal member 12 via a plurality of vibration absorbing members 21. And a support frame 23. The support frame 23 is fixed on the base 22 so as to constitute a leg portion and extends vertically upward, and a substantially rectangular horizontal portion 26 that is joined to the upper portion of the vertical portion 25 and extends horizontally. And a connecting portion 27 for connecting the vertical portion 25 and the horizontal portion 26 obliquely in a brace shape. Here, the vertical portion 25 of the support frame 23 may be a plate-like side plate portion or a plurality of leg portions, and the horizontal portion 26 may be a plate-like top plate portion or a plurality of beam portions. It may be.

  The motor 15 is mounted on the base 22 of the support member 13 inside the support frame 23, and the compression unit 14 is mounted on the horizontal portion 26 of the support frame 23. Further, the tank 16 is fixed to the vertical portion 25 of the support frame 23 in a state of being disposed in the outer space of the support frame 23 on the base 22 of the support member 13.

  The motor 15 has a motor body 30 and a rotating shaft 31 provided in the motor body 30, and the rotating shaft 31 rotates upon receiving power supply.

  The motor 15 is fixed on the upper surface of the base 22 with the rotary shaft 31 disposed horizontally along the width direction of the base 22, and is disposed between the vertical portions 25 of the support frame 23. A pulley 32 is fixed to the rotating shaft 31 of the motor 15.

  The compression unit 14 compresses fluid, and includes a crankcase 35, a single cylinder 36 projecting vertically from the crankcase 35, a cylinder head 37 that closes the upper portion of the cylinder 36, and a crankcase 35. A crankshaft (rotary shaft) 38 is rotatably supported at the center. The compression unit 14 is configured such that when a crankshaft 38 in the crankcase 35 rotates, a piston (not shown) disposed in the cylinder 36 reciprocates vertically, and as a result, sucks and compresses fluid. Discharge. The compression unit 14 is a single cylinder type.

  The compression portion 14 is fixed to the upper surface of the horizontal portion 26 of the support frame 23 in a state where the crankshaft 38 is arranged in parallel with the rotation shaft 31 of the motor 15, and a pulley provided on the motor 15 is attached to the crankshaft 38. A pulley 39 is fixed on the same side as 32.

  The pulley 39 attached to the compression unit 14 has a plurality of radial blade portions 42 and generates wind toward the compression unit 14 during rotation. That is, the pulley 39 also serves as a cooling fan.

  The pulley 32 of the motor 15 and the pulley 39 of the compression unit 14 are aligned with each other in the axial direction, and an endless belt 45 is wound around the pulleys 32 and 39. Thereby, the crankshaft 38 of the compression part 14 is rotationally driven by the motor 15 via the pulley 32, the belt 45, and the pulley 39, the piston (not shown) moves up and down, and the compression part 14 compresses the fluid.

  The tank 16 is formed by closing both sides of a cylindrical body portion 47 with lid portions 48 and has a shape that is long in the axial direction. The tank 16 is fixed to the outer surface of the vertical portion 25 of the support frame 23 via a fixing member 49 in a posture in which the central axis is along the vertical direction.

  A pipe 50 is connected to the cylinder head 37 of the compression unit 14, and this pipe 50 is connected to the tank 16. Thereby, the compressed fluid discharged from the compression part 14 will be introduce | transduced into the tank 16 via the piping 50, and the tank 16 stores the introduced compressed fluid.

  Here, all of the members supported by the support member 13 such as the motor 15, the compression unit 14 and the tank 16 described above and the support member 13 constitute a compressor body 51, and a plurality of the compressor bodies 51 are provided. The vibration absorbing member 21 is installed on the pedestal member 12. In other words, the weight of the compressor main body 51 is the sprung weight above the vibration absorbing member 21 supported by the plurality of vibration absorbing members 21, and the compressor main body 51 is a sprung system component.

The above-described vibration absorbing member 21 interposed between the support member 13 of the compressor main body 51 and the pedestal member 12 expands and contracts in the axial direction, as shown in FIG. The vibration isolating rubber (elastic member) 55 which is inclined and arranged, the support plate portion 56 which is bonded to the lower surface of the vibration isolating rubber 55 perpendicular to the inclination direction, and the support plate from the lower edge portion of the support plate portion 56 A lower mounting member 58 having a fixing plate portion 57 extending at an obtuse angle with the portion 56 and extending horizontally in the upper direction of the anti-vibration rubber 55, and a support bonded to the upper surface of the anti-vibration rubber 55 perpendicular to the inclination direction An upper mounting member 61 having a plate portion 59 and a fixed plate portion 60 that extends from the upper edge portion of the support plate portion 59 at an acute angle to the support plate portion 59 in a direction opposite to the lower direction of the anti-vibration rubber 55. And have. Here, the anti-vibration rubber 55 is inclined so that the angle α with respect to the horizontal is 45 degrees.
However, although the setting angle of the support plate portion 56 and the fixed plate portion 57 is an obtuse angle, it may be an acute angle. In that case, the support plate portion 59 and the fixed plate portion 59 form an obtuse angle. Further, depending on the vibration mode, an acute angle and an obtuse angle can be selected as appropriate.

  Here, the anti-vibration rubber 55 has a cross-sectional shape in which the axis orthogonal cross section shown in FIG. 2C has a horizontally long shape in which the width direction is horizontal and the longitudinal direction is inclined with respect to the horizontal, and both ends in the longitudinal direction are tapered. It has the shape of

  Further, the fixing plate portion 57 of the lower mounting member 58 and the fixing plate portion 60 of the upper mounting member 61 are arranged so as to be spaced apart from each other in the horizontal direction. The mounting bolt 57a is fixed to the upper mounting member 61 so as to protrude downward, and the mounting bolt 60a protrudes upward on the fixing plate portion 60 of the upper mounting member 61 coaxially with the mounting bolt 57a of the lower mounting member 58. 60a is fixed.

  Here, in the vibration absorbing member 21, the lower mounting member 58 is placed on the upper surface of the pedestal member 12 in the fixing plate portion 57, and is fixed to the pedestal member 12 with the mounting bolts 57a. The attachment member 61 is brought into contact with the lower surface of the support member 13 of the compressor main body 51 at the fixing plate portion 60 and is fixed to the support member 13 with the attachment bolt 60a.

As shown in FIG. 1, when referring to the vertical line g passing through the center of gravity of the compressor main body 51, all the vibration absorbing members 21 have the anti-vibration rubber 55 of the crankshaft 38 that is the rotating shaft of the compression unit 14. In the axis-orthogonal horizontal direction (left and right direction in FIG. 1), the lower part is inclined and the upper part is located on the side opposite to the center of gravity of the compressor body 51. In other words, all the vibration absorbing members 21 are in a state in which the axis of the anti-vibration rubber 55 is disposed within the axis orthogonal plane of the crankshaft 38, and as a result, the longitudinal direction of the axis orthogonal cross section is the axis orthogonal to the crankshaft 38. It will be in the state arrange | positioned in a plane.
Here, in the case of a general tilting arrangement of the anti-vibration rubber, the axis of the anti-vibration rubber is often attached so that the upper part faces the direction of the center of gravity. Therefore, when a comparative experiment was performed, in the case of a general inclined structure of the anti-vibration rubber, the phenomenon that the compressor main body 51 moved on the floor surface due to vibration occurred. In the configuration in which the lower part of 55 is arranged on the center of gravity side, the compression main body 51 does not move.

  Moreover, the vibration absorbing member 21 has a center of gravity G in the crankshaft direction (vertical direction in FIG. 3) on the same circumference C with the center of gravity G of the compressor body 51 as the center, as shown in FIG. They are arranged at four locations that are equidistant from the passing virtual line and at two locations (a plurality of locations) that are between these four locations in the crankshaft direction on the same circumference C. More specifically, the two vibration-absorbing members 21 are arranged at two locations facing the both sides in the direction perpendicular to the crankshaft with respect to the center of gravity G, which coincides with the center of gravity G of the compressor body 51 and the crankshaft direction in plan view. Has been.

  Here, as shown in FIG. 4, the base member 12 is provided with a frame portion 65 surrounding the compressor body 51. The frame portion 65 includes a column portion 66 that extends vertically upward from the four corners of the base member 12 and a top plate portion 67 that is supported by the column portions 66 and covers the compressor body 51 from above. It is made up of. That is, the compressor 11 of the present embodiment is a so-called package-type compressor, and the frame portion 65 has a function as a soundproof box, and reduces noise and improves design.

  According to the compressor 11 of the present embodiment having the above-described configuration, the plurality of vibration absorbing members 21 interposed between the support member 13 and the base member 12 of the compressor main body 51 are expanded and contracted in the axial direction to compress the compression unit. 14 has an anti-vibration rubber 55 that is inclined so that the lower part is located on the center of gravity G side of the compressor body 51 and the upper part is located on the opposite side of the center of gravity G in the horizontal direction perpendicular to the axis 14 of the crankshaft 38. In plan view, between four locations that are equidistant from the imaginary line passing through the center of gravity G in the crankshaft direction on the circumference C around the center of gravity G and four locations in the crankshaft direction on the circumference C Because it is arranged at the center of gravity G of the compressor body 51 and at two locations that coincide with the crankshaft direction, it is sufficient to save space with a simple structure against weight increase and height increase etc. Vibration can be suppressed.

  In particular, the vibration at the time of starting and stopping of the compressor 11 is dominated by the vibration of the crankshaft 38 due to the rotation torque of the motor 15 and the swinging vibration in the direction orthogonal to the crankshaft due to the reciprocation of the piston (not shown). At the time of steady operation, it becomes a composite vibration, and the vertical vibration is dominant at the mass center of gravity of the piston. However, the plurality of vibration absorbing members 21 are 4 in the crankshaft direction on the circumference C as described above. By adding to two places between the two places, both the vibrations described above can be effectively suppressed. In other words, vibrations in the vertical direction can be effectively suppressed by the anti-vibration rubber 55 that inclines and expands and contracts in this direction. Further, by adding the anti-vibration rubber 55 on both sides in the direction perpendicular to the crankshaft, the oscillation vibration in the direction perpendicular to the crankshaft can be effectively suppressed. Furthermore, by arranging all the vibration isolating rubbers 55 on the circumference C with the center of gravity G of the compressor body 51 as the center, the load applied to each vibration isolating rubber 55 can be averaged, and the load bias can be reduced. Therefore, it is possible to effectively suppress both vibrations of oscillation and vertical vibrations and to suppress other abnormal vibrations.

  Further, according to the compressor 11 of the present embodiment, the vibration absorbing member 21 includes the vibration isolating rubber 55 and the support plate portion 56 joined to the lower surface of the vibration isolating rubber 55 perpendicular to the inclination direction of the vibration isolating rubber 55. And a lower mounting member 58 having a fixed plate portion 57 that extends horizontally from the lower portion of the support plate portion 56 and is fixed to the pedestal member 12, and an upper surface of the vibration isolation rubber 55 perpendicular to the inclination direction of the vibration isolation rubber 55. Since it has a support plate portion 59 to be joined and an upper mounting member 61 having a fixed plate portion 60 that extends horizontally from the upper portion of the support plate portion 59 and is fixed to the support member 13, the vibration isolating rubber 55 is provided. The pedestal member 12 and the compressor main body 51 can be reliably connected while being favorably held in the inclined state.

  Further, according to the compressor 11 of the present embodiment, since the vibration amplitude in the swinging direction at the start and stop of the compressor 11 can be suppressed, the compressor main body 51 hits the frame portion 65 and is damaged. Can be prevented.

  In the above embodiment, the vibration absorbing member 21 is arranged at an equal distance from the imaginary line passing through the center of gravity G in the crankshaft direction on the same circumference C around the center of gravity G of the compressor body 51. As an example, a total of 6 locations where 2 locations are added between the 4 locations in the crankshaft direction are described. However, an even number may be used, for example, on a virtual line passing through the center of gravity G in the crankshaft direction. From the four crankshaft directions that are equidistant from each other, four places that are equidistant from the center of gravity G in the crankshaft direction may be added, for a total of eight places, or even more.

  In the above embodiment, the case where the compression unit 14 is a single cylinder in which the cylinder 36 is arranged in the vertical direction has been described as an example. However, a V-type two cylinder in which cylinders are arranged on both sides with respect to the vertical direction. Alternatively, it may be a horizontally opposed two-cylinder, a W-type three-cylinder in which cylinders are arranged on both sides with respect to the vertical direction and the vertical direction. However, since the single-cylinder type has a large vertical vibration (longitudinal vibration) particularly during steady operation as compared with other multi-cylinder types, the above configuration is particularly effective for this vertical vibration.

Here, the reason why the anti-vibration rubber 55 is inclined is as follows.
Unlike the spring, the anti-vibration rubber 55 is not a spring constant or strength that can be freely set. In many cases, an anti-vibration rubber 55 is selected from existing ones according to product specifications. However, especially in a single-cylinder, long-stroke compressor, etc., vibration in the Z direction is large, and selection thereof is difficult. For example, when the anti-vibration rubber 55 is selected from existing ones, even when the target of vibration transmissibility is set to about 30%, the specifications are that the Z-direction static spring constant is 30 N / mm and the Z-direction allowable load is 190 N. become. Under this condition, if the anti-vibration rubber 55 is selected from the spring constant, it is generally very soft. On the other hand, when selecting from the allowable load, nothing satisfies this spring constant. As described above, unlike the spring, the anti-vibration rubber 55 is proportional to the spring constant and the allowable load to some extent, so that it is difficult to make “soft and strong spring constant”. Further, when the vibration isolating rubber 55 is soft in the Z direction, the X and Y directions are inevitably softened. For this reason, it becomes impossible to suppress unsteady vibrations (vibrations at the time of starting / stopping). For this reason, the anti-vibration rubber | gum 55 was considered attaching diagonally.

  As shown in FIG. 2A, by attaching the anti-vibration rubber 55 at an angle, the spring constant in the Z direction is substantially reduced as indicated by the broken line arrow with respect to the solid line arrow in the figure. However, since the rubber itself is not softened, the strength (allowable load) of the anti-vibration rubber 55 can be maintained, and vibrations in the X and Y directions (left and right, front and rear directions) do not increase. Moreover, the cross section of the vibration-proof rubber adopted this time is as shown in FIG. This indicates that it is strong against deformation in the Y direction with respect to the X direction. By arranging this as shown in FIG. 3, fluctuations in the Y direction can be suppressed. If the inclination angle of the anti-vibration rubber is too small, the change amount of the substantial spring constant with respect to the original spring constant is too small, and if it falls too much, the direction of load applied to the anti-vibration rubber 55 changes too much (almost from the side). In this embodiment, an inclination angle of 45 degrees is employed.

It is a front view which shows the principal part structure of the compressor of one Embodiment which concerns on this invention. BRIEF DESCRIPTION OF THE DRAWINGS The vibration-absorbing member of the compressor of one Embodiment which concerns on this invention is shown, (a) is a front view, (b) is a side view, (c) is AA sectional drawing of (a). It is a top view which shows arrangement | positioning of the vibrational absorption member of the compressor of one Embodiment which concerns on this invention. It is a front view showing the whole compressor composition of one embodiment concerning the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Compressor 12 Base member 13 Support member 14 Compression part 15 Motor 21 Vibration absorption member 38 Crankshaft (rotary shaft)
51 Compressor body 55 Anti-vibration rubber (elastic member)
56 Support plate portion 57 Fixed plate portion 58 Lower mounting member 59 Support plate portion 60 Fixed plate portion 61 Upper mounting member 65 Frame portion C Circumference G Center of gravity

Claims (3)

A compressor main body formed by supporting a motor and a compression unit that is rotationally driven by the motor and compresses fluid with a support member;
A pedestal member for installing the compressor body;
A plurality of vibration absorbing members interposed between the support member and the pedestal member of the compressor body,
These vibration absorbing members extend and contract in the axial direction and are inclined so that the lower part is located on the center of gravity side of the compressor body and the upper part is located on the opposite side of the center of gravity in the horizontal direction perpendicular to the axis of rotation of the compression unit. 4 locations that are equidistant from the imaginary line passing through the center of gravity in the axial direction of the rotation axis on the circumference centered on the center of gravity in plan view, and the circumference The compressor is arranged at a plurality of locations between the four locations in the axial direction of the rotary shaft.   The vibration absorbing member extends horizontally from the elastic member, a support plate portion that is orthogonal to the inclination direction of the elastic member and is joined to the lower surface of the elastic member, and a lower portion of the support plate portion. A lower mounting member having a fixed plate portion to be fixed, a support plate portion that is bonded to the upper surface of the elastic member perpendicular to the inclination direction of the elastic member, and the support plate that extends horizontally from the upper portion of the support plate portion The compressor according to claim 1, further comprising an upper mounting member having a fixing plate portion fixed to the member.   The compressor according to claim 1 or 2, wherein the base member is provided with a frame portion surrounding the compressor main body.

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