JP2005511958A - Vane support device for hermetic compressor - Google Patents

Abstract

  The vane support device of the hermetic compressor is designed to reduce the height of the support device that supports each vane by elastically supporting the vane contacting both sides of the cam surface of the partition plate with a torsion bar having a square or circular cross section. Thus, the distance between the electric mechanism portion and the compression mechanism portion can be reduced, thereby reducing the axial length of the compressor and reducing the size of the compressor.

Description

  The present invention relates to a vane support device for a hermetic compressor, and more particularly to a vane support device for a hermetic compressor that can be formed with a low height to reduce the axial length of the compressor. Is.

  Generally, a hermetic compressor using a vane is provided with a vane that moves linearly in a reciprocating motion and divides the internal space of the cylinder into a suction area and a compression area. The region and the compression region are alternately interchanged according to the phase difference of the rotating body, so that the fluid is sucked and compressed and discharged.

  FIG. 1 is a longitudinal sectional view showing an example of a conventional hermetic compressor, and FIG. 2 is a partially enlarged view showing a vane support device of the conventional hermetic compressor. As shown in the figure, the conventional compressor is connected to the rotor Mr and an electric mechanism having a stator Ms and a rotor Mr for generating power above the casing 1, and sucks fluid. And a compression mechanism for compressing and discharging.

  In addition, the compression mechanism section includes a cylinder 2 fixed below the inside of the casing 1, and a first bearing plate that forms a space inside the cylinder 2 by being fixed to the upper surface and the lower surface of the cylinder 2, respectively. 3A and the second bearing plate 3B, and fitted to the rotor Mr of the electric mechanism portion, and through-engaged with the first and second bearing plates 3A and 3B, the power of the electric mechanism portion is increased. A rotating shaft 4 that transmits to the compression mechanism, and a partition plate 5 that is engaged with or integrally formed with the rotating shaft 4 to partition the internal space of the cylinder 2 into a first space S1 and a second space S2. A first vane 6A that contacts the lower end or the upper end of both side surfaces of the partition plate 5 and partitions the first and second spaces S1, S2 into a suction region and a compression region when the rotating shaft 4 rotates. And the second vane 6B and the first spring that elastically supports each of the first and second vanes 6A and 6B. The assembly 8A and the second spring assembly 8B are configured.

  In addition, the partition plate 5 is formed in a disk shape during planar projection so that the outer peripheral wall surface is in sliding contact with the inner peripheral wall surface of the cylinder 2, and both side surfaces are outer peripheral from the inner peripheral surface during deployment. It is formed as a sinusoidal cam surface with the same thickness up to the surface.

  The first vane 6A and the second vane 6B are formed as a rectangular parallelepiped, pass through one side surface of each of the first and second bearing plates 3A, 3B, and on the upper and lower cam surfaces of the partition plate 5. They are in contact with each other, and reciprocate in the axial direction when the rotating shaft 4 rotates.

  The outer wall surfaces of the first and second vanes 6A and 6B are in contact with or inserted into the inner peripheral wall surface of the cylinder 2, while the inner wall surfaces are in sliding contact with the outer peripheral surface of the rotating shaft 4. Combined with

  The first spring assembly 8A and the second spring assembly 8B are formed by compression coil springs, and support the rear surfaces of the first and second vanes 6A and 6B, respectively. And a first spring holder 8b and a second spring holder 8d, which receive the first and second springs 8a and 8c, respectively, and are mounted on the first bearing plate 3A and the second bearing plate 3B, respectively. .

  In the figure, unexplained reference numerals 2a and 2b are suction ports of the respective spaces, 3a and 3b are discharge ports, 7A and 7B are discharge mufflers, 7a and 7b are discharge holes, DP is a discharge pipe, and SP is a suction pipe. Yes.

Hereinafter, the operation of the compressor will be described.
First, when power is applied to the electric mechanism portion and the rotor Mr rotates, the rotating shaft 4 coupled to the rotor Mr is rotated in one direction together with the partition plate 5, and the upper and lower sides of the partition plate 5 are The first and second vanes 6A and 6B, which are in contact with both side surfaces, respectively, reciprocate up and down in opposite directions depending on the height position of the partition plate 5, thereby allowing the first space S1 and the first 2 Change the volume of space S2.

  Next, after a new fluid is simultaneously sucked and gradually compressed through the suction ports 2a and 2b of the first space S1 and the second space S2, the top dead center or the bottom dead center of the partition plate 5 is the discharge start position. At the same time, the compressed fluid is discharged through the discharge ports 3a and 3b of the first and second spaces S1 and S2.

  However, in such a conventional compressor, all of the first spring 8a and the second spring 8c that support the first and second vanes 6A and 6B have a predetermined length in the axial direction of the rotary shaft 4. The length of the entire compressor is increased in the axial direction by increasing the length L1 between the electric mechanism portion and the compression mechanism portion by the length of the compression coil spring. There was a disadvantage that the size of the compressor was increased.

  It is an object of the present invention to provide a vane support device for a compressor that can reduce the size of the compressor by forming the support member supporting each vane short.

In order to achieve such an object, a sealed casing, an electric mechanism unit that is firmly coupled to the inside of the casing to generate power, a cylinder that is firmly coupled to a lower portion of the casing, and the cylinder The first and second bearing plates that are fixed to the upper and lower surfaces of the cylinder to form a space inside the cylinder, and are fitted to the rotor of the electric mechanism unit, and the first and second (2) A rotating shaft that penetrates the bearing plate, a partition plate that engages with the rotating shaft in the inner space of the cylinder, and partitions the inner space into a plurality of sealed spaces, and both side surfaces of the partition plate are in contact with each other. And a plurality of vanes that reciprocate along the axial direction to convert each sealed space into a suction region and a compression region, respectively, during rotation of the rotating shaft. A vane support device for a compressor,
There is provided a vane support device for a hermetic compressor, comprising at least one or more torsion bars whose one side elastically supports the vanes, and fixing means for fixing the other side of the torsion bars to the cylinder.

  In the vane support device for a hermetic compressor according to the present invention, the vane that is in contact with both sides of the cam surface of the partition plate is elastically supported by a torsion bar having a quadrangular or circular cross section, thereby supporting each vane. By reducing the height of the support device, the distance between the electric mechanism portion and the compression mechanism portion can be reduced, thereby reducing the axial length of the compressor and reducing the size of the compressor.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 3 is a longitudinal sectional view showing a hermetic compressor according to the present invention, and FIGS. 4 and 5 are a front view and a plan view showing a first embodiment of the vane support device of the hermetic compressor according to the present invention. FIG. 6 is a perspective view showing a coupled state of the torsion bar and the vane of the vane support device for the hermetic compressor according to the present invention, and FIG. 7 is a vane support of the hermetic compressor according to the present invention. FIG. 8 is a partially enlarged view showing the apparatus, and FIG. 8 is a plan view showing another embodiment of the vane support device for the hermetic compressor according to the present invention.

  As shown in the drawing, in the first embodiment of the vane support device according to the present invention and the compressor including the same, the stator Ms and the rotor Mr which are fixed above the inside of the casing 1 to form an electric mechanism section. A cylinder 2 firmly attached to the lower part of the inside of the casing 1, and a first bearing plate 3A and a second bearing plate 3B that are fixed to the upper and lower surfaces of the cylinder 2 to form an internal space of the cylinder 2. And the rotating shaft 4 that is fitted to the rotor Mr and that is fitted through the first and second bearing plates 3A and 3B, and is engaged with or integrally formed with the rotating shaft 4, A partition plate 5 that partitions the internal space of the cylinder 2 into a first space S1 and a second space S2, and one end of each of the partition plates 5 is in contact with both side surfaces of the partition plate 5, during rotation of the rotary shaft 4, The first and second spaces S1, S2 are compressed with the suction region A first vane 6A and the second vane 6B which partitioned into a band, first torsion bars 11 and the second torsion bar 12 to elastically support their respective first and second vane 6A, the 6B, are provided and.

  Further, the partition plate 5 is formed in a disk shape at the time of planar projection so that the outer peripheral surface is in sliding contact with the inner peripheral surface of the cylinder 2, and both side surfaces are outer peripheral from the inner peripheral surface during deployment. It is formed into a sinusoidal cam surface having the same thickness up to the surface.

  Further, the first vane 6A and the second vane 6B are formed in a substantially rectangular parallelepiped shape, and one side surface thereof facing each other passes through the first and second bearing plates 3A and 3B and is located above and below the partition plate 5. The first torsion bar 11 and the second torsion bar 12 are arranged in the radial direction of the rotating shaft 4 on the other side surfaces other than the one side surface that are in contact with the cam surfaces on both sides and contact the respective cam surfaces of the partition plate 5. Sliding grooves 6a and 6b for slidably mounting on each other are formed by cutting.

  Further, as shown in FIGS. 4 and 5, the first torsion bar 11 and the second torsion bar 12 are bent and formed in a substantially cruciform polygonal shape with a closed loop and open at the center. One side of the square is placed and engaged with the sliding grooves 6a and 6b of the first and second vanes 6A and 6B, and the other side is the first and second bearing plates 3A and 3B. It is fixed via belt-like support members 21 and 22 as fixing means to be connected or welded to the upper surface.

On the other hand, as another embodiment of the vane support device of the hermetic compressor according to the present invention, as shown in FIG. 8, the first and second bearings are bent and formed in a single member in an open loop shape. It can also be fixed to the upper surface of the plates 3A, 3B.
In addition, it is possible to form a closed loop or an open loop so that the support member as the fixing means can be installed on different bearing plates.

Further, the first torsion bar 11 and the second torsion bar 12 are made of a linear material having a circular cross section or a square shape.
In the figure, unexplained reference numerals 2a and 2b are suction ports in the spaces, 3a and 3b are discharge ports, 7A and 7B are discharge mufflers, 7a and 7b are discharge holes, DP is a discharge pipe, and SP is a suction pipe. Is.

Hereinafter, the effect of the vane support device of the compressor according to the present invention will be described.
First, when power is applied to the electric mechanism section, the rotating shaft 4 rotates together with the partition plate 5, and the first and second vanes 6A and 6B that are in contact with the upper and lower surfaces of the partition plate 5, respectively, After reciprocating in the opposite directions along the height position, new fluid is simultaneously sucked into the first space S1 and the second space S2 of the cylinder 2 and gradually compressed. A series of strokes discharged at the same time as the dead center or the bottom dead center reaches the discharge start position is repeated.

  At this time, each of the first and second torsion bars 11 and 12 applies an elastic force around the fixing point of each support member 21 and 22 until the partition plate 5 reaches the top dead center or the bottom dead center. While accumulating, each of the first and second vanes 6A and 6B is pushed along each of the first vanes 6B and temporarily bent, and then restored from the time when the first space S1 and the second space S2 start inhalation. By pressing the contact ends of the first and second vanes 6A and 6B so as to be in close contact with the cam surfaces of the partition plate 5, the first space S1 and the second space S2 maintain a sealed space.

  In this manner, by using the first torsion bar 11 and the second torsion bar 12 to support the first and second vanes 6A and 6B, as shown in FIG. The height of the support device for supporting the second vanes 6A and 6B can be reduced, and the distance L2 between the electric mechanism portion and the compression mechanism portion can be reduced to reduce the overall length of the compressor. become.

It is the longitudinal cross-sectional view which showed an example of the conventional hermetic compressor. It is the elements on larger scale which showed the vane support apparatus of the conventional hermetic compressor. It is the longitudinal cross-sectional view which showed the hermetic compressor provided with the vane support apparatus which concerns on this invention. 1 is a front view showing a first embodiment of a vane support device of a hermetic compressor according to the present invention. It is the top view which showed 1st Embodiment of the vane support apparatus of the hermetic compressor which concerns on this invention. It is the perspective view which showed the coupling | bonding state of the torsion bar and vane of the vane support apparatus of the hermetic compressor which concerns on this invention. It is the elements on larger scale which showed the vane support apparatus of the closed type compressor which concerns on this invention. It is the top view which showed other embodiment of the vane support apparatus of the hermetic compressor which concerns on this invention.

Claims (5)

A hermetically sealed casing, an electric mechanism that is firmly fixed inside the casing to generate power, a cylinder that is firmly fixed below the casing, and an upper surface and a lower surface of the cylinder, A first bearing plate and a second bearing plate that form an internal space of the cylinder; a rotating shaft that is fitted to the rotor of the electric mechanism unit and is positioned through the first and second bearing plates; A partition plate that engages with the rotation shaft in the internal space of the cylinder, partitions the internal space into a plurality of sealed spaces, and is in contact with both side surfaces of the partition plate. A plurality of vanes that convert each sealed space into a suction region and a compression region by reciprocating along the axial direction, and a vane support for a hermetic compressor A device,
At least one torsion bar for supporting each vane on one side;
A vane supporting device for a hermetic compressor, comprising fixing means for fixing the other side of the torsion bar to the cylinder.   The vane support device for a hermetic compressor according to claim 1, wherein the torsion bar has a bent portion at a center thereof and is formed in a closed loop shape.   2. The vane supporting device for a hermetic compressor according to claim 1, wherein the torsion bar has a bent portion at the center thereof and is formed in an open loop shape.   2. The vane of a hermetic compressor according to claim 1, wherein the vane has a sliding groove that allows the torsion bar to slide in a radial direction of the cylinder on a surface in contact with the torsion bar. Support device.   The vane support device for a hermetic compressor according to claim 1, wherein the torsion bar is formed in a circular cross section or a quadrangular cross section.

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