CN214577718U - Balancing piece and compressor - Google Patents

Balancing piece and compressor Download PDF

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Publication number
CN214577718U
CN214577718U CN202023329356.XU CN202023329356U CN214577718U CN 214577718 U CN214577718 U CN 214577718U CN 202023329356 U CN202023329356 U CN 202023329356U CN 214577718 U CN214577718 U CN 214577718U
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China
Prior art keywords
straight line
line segment
weight
compressor
rotor
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CN202023329356.XU
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Chinese (zh)
Inventor
林岩
刘万振
姚丽
刘广强
王震宇
王猛
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Danfoss Tianjin Ltd
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Danfoss Tianjin Ltd
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Priority to DE202021106915.5U priority patent/DE202021106915U1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0021—Systems for the equilibration of forces acting on the pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/807—Balance weight, counterweight

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

A counterweight and a compressor are provided. The balance weight is adapted to be mounted on a rotor of the compressor. The balance block is semicircular and comprises a top surface, a bottom surface, an inner circumferential surface, an outer circumferential surface, a first end surface and a second end surface. The bottom surface is a horizontal plane. The first end surface and the second end surface are respectively positioned at two ends of the balance block in the circumferential direction. The top surface is a smooth gradually-changed inclined surface. The sideline that top surface and first terminal surface intersect and form or the line segment between the two extreme points of sideline is horizontal first straight line segment, and the contained angle between first straight line segment and the horizontal plane is 0 degree. The sideline formed by the intersection of the top surface and the second end surface or the line segment between two end points of the sideline is an inclined second straight line segment. An acute included angle exists between the second straight line section and the horizontal plane, and the height of an endpoint of the second straight line section, which is positioned on the radial outer side, is larger than the height of an endpoint of the second straight line section, which is positioned on the radial inner side. The bottom surface of the balance weight is matched with the rotor. The first straight line segment is located on the upstream side or in front of the second straight line segment in the rotation direction of the rotor and the counterweight.

Description

Balancing piece and compressor
Technical Field
The utility model relates to a balancing piece and install compressor of this balancing piece.
Background
FIG. 1 is a schematic perspective view of a conventional scroll compressor. The scroll compressor generally includes a stationary region 1 and a rotational region 2. The stationary zone 1 includes the stator, casing, etc. of the scroll compressor. The rotation region 2 includes a rotor, a weight 5 provided at a lower end of the rotor, and the like. In addition, a fluid inlet port 3 and a fluid outlet port 4 are provided in the casing of the scroll compressor.
Fig. 2 is a schematic view of the outer shape of the weight 5 mounted at the lower end of the rotor of the scroll compressor in fig. 1, in which (a) is a perspective view of the weight 5 and (B) is a side view of the weight 5. As can be seen from fig. 2, the weight 5 is generally in the shape of a regular semicircular ring, and the bottom surface 51 and the top surface 52 of the weight 5 are planes parallel to each other.
SUMMERY OF THE UTILITY MODEL
According to an aspect of the present invention, a counterbalance is provided. The counterbalance is generally semicircular and annular, and has a top surface, a bottom surface, an inner peripheral surface, an outer peripheral surface, a first end surface and a second end surface. The bottom surface is a horizontal plane, and the first end surface and the second end surface are respectively located at two ends of the balance block in the circumferential direction. The top surface is a smooth gradient inclined surface, wherein a sideline formed by intersecting the top surface and the first end surface or a line segment between two end points of the sideline is a horizontal first straight line segment, so that an included angle between the first straight line segment and a horizontal plane is 0 degree. The side line formed by the intersection of the top surface and the second end surface or the line segment between two end points of the side line is an inclined second straight line segment, an acute included angle exists between the second straight line segment and the horizontal plane, and the height of the end point of the second straight line segment positioned on the radial outer side is larger than that of the end point of the second straight line segment positioned on the radial inner side.
Specifically, the weight has the following geometric configuration: the imaginary intersecting lines of the section plane passing through the vertical rotation central axis of the balance block and the top surface are straight line segments, and the included angle between the intersecting lines and the horizontal plane is gradually increased from 0 degree of the first straight line segment to the acute angle included angle of the second straight line segment.
The first end surface and the second end surface may be vertical planes formed by imaginary sectional planes passing through a vertical rotation central axis of the weight. The first end surface and the second end surface may have other shapes as long as the extension lines of the first straight line segment and the second straight line segment intersect with the vertical rotation central axis of the balance weight.
Optionally, the inner circumferential surface is a circumferential surface, a sideline formed by intersecting the top surface and the inner circumferential surface is an arc line, and the arc line and the first straight line segment are in the same horizontal plane.
Optionally, the inner circumferential surface is a circumferential surface, a side line formed by the intersection of the top surface and the inner circumferential surface is a spiral line, and a helix angle of the spiral line is an acute angle not greater than 45 degrees, so that a height of an end point of the second straight line segment located on a radially inner side is greater than a height of an end point of the first straight line segment.
In addition, the inner circumferential surface and the outer circumferential surface may be concentric circumferential surfaces.
Optionally, the outer peripheral surface is a smoothly gradually changing curved surface, wherein a side line formed by intersection of the outer peripheral surface and the first end surface is a vertical third straight line segment, and an included angle between the third straight line segment and a horizontal plane is 90 degrees. And a side line formed by the intersection of the outer peripheral surface and the second end surface is an inclined fourth straight line section, and an obtuse included angle is formed between the fourth straight line section and the horizontal plane. The peripheral surface has the following geometric configuration: the imaginary intersecting lines of the section plane passing through the vertical rotation central axis of the balance block and the peripheral surface are straight line segments, and the included angle between the intersecting lines and the horizontal plane is gradually increased from 90 degrees at the third straight line segment to the obtuse angle included angle at the fourth straight line segment.
According to another aspect of the present invention, a compressor is provided. The compressor is provided with a crankshaft and a motor, the motor is provided with a rotor extending in the vertical direction and a stator matched with the rotor, and the rotor drives the crankshaft to rotate in a rotating mode. At the lower end of the rotor is mounted a balance weight according to the above. The weight is mounted to: the first straight line section is located on an upstream side or in front of the second straight line section in a rotation direction of the rotor and the balance weight.
Specifically, the bottom surface of the balance weight is fitted to the lower end surface of the rotor. Optionally, an end ring is provided at the lower end of the rotor, and the bottom surface of the balance weight is engaged with the lower end surface of the end ring. Optionally, the end ring is made of a cast aluminum material.
More specifically, the compressor may be a scroll compressor. The scroll compressor includes a first scroll assembly and a second scroll assembly. The crankshaft is connected with the first scroll assembly to drive the first scroll assembly to rotate, and the first scroll assembly is meshed with the second scroll assembly to form a compression chamber to compress gas entering the scroll compressor, wherein the crankshaft penetrates through an inner circumferential hole of the balance block.
According to another aspect of the present invention, a compressor is provided. The compressor is provided with a crankshaft and a motor, the motor is provided with a rotor extending in the vertical direction and a stator matched with the rotor, and the rotor drives the crankshaft to rotate in a rotating mode. At the lower end of the crankshaft is mounted a counterbalance according to the preamble, which cooperates with the crankshaft through its inner circumferential hole. The weight is mounted to: the first straight line section is located on an upstream side or in front of the second straight line section in a rotational direction of the crankshaft and the balance weight.
More specifically, the compressor may be a scroll compressor. The scroll compressor comprises a first scroll component and a second scroll component, wherein the crankshaft is connected with the first scroll component to drive the first scroll component to rotate, the first scroll component is meshed with the second scroll component to form a compression cavity, so that gas entering the scroll compressor is compressed, and the balance block is located below the rotor.
Through adopting the above technical scheme of the utility model, especially adopt the utility model discloses in the balancing piece that proposes, can further improve scroll compressor's cooling operating mode, improve the cooling performance of compressor.
Drawings
In order to facilitate understanding of the invention, the invention is described in more detail below on the basis of exemplary embodiments and with reference to the attached drawings. The same or similar reference numbers are used in the drawings to refer to the same or similar parts. It should be understood that the drawings are merely schematic and that the dimensions and proportions of elements in the drawings are not necessarily precise.
FIG. 1 is a schematic perspective view of a conventional scroll compressor.
Fig. 2 is a schematic view of the outer shape of a weight mounted at the lower end of a rotor of the scroll compressor in fig. 1, in which (a) is a perspective view of the weight and (B) is a side view of the weight.
Fig. 3 is a schematic view of the outer shape of the weight according to an embodiment of the present invention, in which (a) is a perspective view of the weight and (B) is a side view of the weight.
Fig. 4 is a schematic view of the outer shape of a weight according to another embodiment of the present invention, in which (a) is a perspective view of the weight and (B) is a side view of the weight.
Fig. 5 is a schematic view showing the outer shape of a weight according to another embodiment of the present invention, in which (a) is a perspective view of the weight and (B) is a side view of the weight.
Fig. 6 illustrates the meshing of the scroll compressor when a finite element analysis is performed on the cooling condition of the scroll compressor, wherein (a) part shows the meshing of the rotational region inside the scroll compressor, and (B) part shows the meshing of the stationary region of the scroll compressor.
FIG. 7 is an experimental diagram showing the analysis results of the cooling conditions of the scroll compressor, wherein part (A) shows the temperature distribution of the scroll compressor using the conventional balance weight, and part (B) shows the temperature distribution of the scroll compressor using the balance weight according to the present invention.
Detailed Description
Embodiments of the present invention are described in detail below with reference to the accompanying drawings.
In conventional scroll compressors, the effect of the shape of the counterweight on the flow of fluid within the scroll compressor (and thus on the cooling condition of the scroll compressor) is not considered.
The technical scheme of the utility model the balancing piece among to this kind of scroll compressor has improved.
According to one aspect of the present invention, the counterbalance is generally semi-annular in shape having a top surface, a bottom surface, an inner peripheral surface, an outer peripheral surface, a first end surface, and a second end surface. The bottom surface is a horizontal plane, and the first end surface and the second end surface are respectively located at two ends of the balance block in the circumferential direction. The top surface is a smooth gradient inclined surface, wherein a sideline formed by intersecting the top surface and the first end surface or a line segment between two end points of the sideline is a horizontal first straight line segment, so that an included angle between the first straight line segment and a horizontal plane is 0 degree. The side line formed by the intersection of the top surface and the second end surface or the line segment between two end points of the side line is an inclined second straight line segment, an acute included angle exists between the second straight line segment and the horizontal plane, and the height of the end point of the second straight line segment positioned on the radial outer side is larger than that of the end point of the second straight line segment positioned on the radial inner side.
Fig. 3 is a schematic view of the outer shape of the weight 10 according to an embodiment of the present invention, in which (a) is a perspective view of the weight 10 and (B) is a side view of the weight 10.
As shown in fig. 3, the weight 10 is generally semi-circular (similar to the shape of the letter C) having a top surface 102, a bottom surface 101, an inner circumferential surface 103, an outer circumferential surface 104, a first end surface 105, and a second end surface 106. In the present embodiment, the inner circumferential surface 103 and the outer circumferential surface 104 are concentric circumferential surfaces. The bottom surface 101 is a horizontal plane. As will be described hereinafter, the bottom surface 101 is for fitting with a lower end surface of a rotor of a scroll compressor. After the counterweight 10 is mounted to the lower end of the rotor of the scroll compressor, the top surface 102 of the counterweight 10 shown in FIG. 3 will face downward. The weight is placed in the state shown in the figure in fig. 3 (and fig. 4 and 5 described below) for the sake of simplicity only.
As shown in fig. 3, the first end surface 105 and the second end surface 106 are vertical planes and are located at both ends in the circumferential direction of the weight 10, respectively. Unlike the bottom surface 101, the top surface 102 is a smoothly gradually changing inclined surface, wherein a side line formed by the intersection of the top surface 102 and the first end surface 105 is a horizontal first straight line segment
Figure BDA0002875529280000051
I.e. the first straight line segment
Figure BDA0002875529280000052
The included angle between the horizontal plane and the horizontal plane is 0 degree. The line formed by the intersection of the top surface 102 and the second end surface 106 is an inclined second straight line segment
Figure BDA0002875529280000053
Second straight line segment
Figure BDA0002875529280000054
An acute angle alpha exists between the horizontal plane and the horizontal plane. Second straight line segment
Figure BDA0002875529280000055
Is greater than the second straight section
Figure BDA0002875529280000056
Is located radially inward of the end point E.
In the embodiment shown in FIG. 3, the top surface 102 is in contact withThe side line formed by intersecting the inner peripheral surface 103 is a circular arc line
Figure BDA0002875529280000057
And the arc line
Figure BDA0002875529280000058
And a first straight line segment
Figure BDA0002875529280000059
In the same horizontal plane. Thus, the first straight line segment
Figure BDA00028755292800000510
And a circular arc line
Figure BDA00028755292800000511
All the heights of (a) are h.
The counterweight 10 has the following geometric configuration: an infinite number of imaginary intersecting planes passing through the central axis of vertical rotation of the counterweight 10 (shown as a vertical dash-dotted line in fig. 3) intersect the top surface 106 to form respective intersecting lines, which are straight line segments, and the included angles between the intersecting lines and the horizontal plane are taken from the first straight line segment
Figure BDA00028755292800000512
Smoothly gradually increases to the second straight line segment at 0 DEG
Figure BDA00028755292800000513
At an acute angle alpha. The size of the acute included angle α is not particularly limited, and those skilled in the art can select an appropriate acute included angle α according to actual needs, for example, α ═ 21.8 degrees.
After the counterweight 10 is mounted to the lower end of the rotor of the scroll compressor, the counterweight 10 will rotate with the rotor about the vertical central axis in the direction indicated by the arrow R in fig. 3. Thus, in other words, the angle between the line of intersection mentioned in the preceding paragraph and the horizontal decreases progressively in the direction of rotation (R) of the counterweight 10, more particularly from the second straight line segment
Figure BDA0002875529280000061
The acute included angle alpha is gradually reduced to a first straight line segment
Figure BDA0002875529280000062
At 0 degrees.
Fig. 4 is a schematic view of the outer shape of a weight 10' according to another embodiment of the present invention, in which (a) is a perspective view of the weight and (B) is a side view of the weight.
In the embodiment shown in FIG. 4, like the embodiment shown in FIG. 3, the weight 10 ' is generally semi-circular (similar to the shape of the letter C) having a top surface 102 ', a bottom surface 101, an inner peripheral surface 103 ', an outer peripheral surface 104 ', a first end surface 105, and a second end surface 106 '. The inner circumferential surface 103 'and the outer circumferential surface 104' are concentric circumferential surfaces. The bottom surface 101 is a horizontal plane. The top surface 102 'is a smoothly gradually changing inclined surface, wherein the side line formed by the intersection of the top surface 102' and the first end surface 105 is a horizontal first straight line segment
Figure BDA0002875529280000063
I.e. the first straight line segment
Figure BDA0002875529280000064
The included angle between the horizontal plane and the horizontal plane is 0 degree. The line formed by the intersection of the top surface 102 'and the second end surface 106' is an inclined second straight line segment
Figure BDA0002875529280000065
Second straight line segment
Figure BDA0002875529280000066
An acute angle alpha exists between the first straight line section and the horizontal plane, and the second straight line section
Figure BDA0002875529280000067
Is higher than the second straight section at the radially outer end point F
Figure BDA0002875529280000068
Is located radially inward of the end point E 'and has a height h'. The installation manner and the rotational direction of the counterweight 10' are substantially the same as those in the case shown in fig. 3.
In the embodiment shown in fig. 4, the difference from the embodiment shown in fig. 3 is that the side line formed by the intersection of the top surface 102 'and the inner peripheral surface 103' is not an arc line, but is changed into a spiral line
Figure BDA0002875529280000069
Helical wire
Figure BDA00028755292800000610
Is an acute angle of not more than 45 degrees, thereby enabling the second straight line segment
Figure BDA00028755292800000611
Is larger than the first straight line segment
Figure BDA00028755292800000612
Height h of (a).
Fig. 5 is a schematic view of the outer shape of the weight 10 ″ according to another embodiment of the present invention, in which (a) part is a perspective view of the weight and (B) part is a side view of the weight.
In the embodiment shown in FIG. 5, like the embodiment shown in FIG. 4, the weight 10 "is generally semi-circular (similar to the shape of the letter C) having a top surface 102", a bottom surface 101, an inner circumferential surface 103', an outer circumferential surface 104 ", a first end surface 105 and a second end surface 106". The inner peripheral surface 103' is a circumferential surface. The bottom surface 101 is a horizontal plane. The top surface 102 'is a smoothly gradually changed inclined surface, wherein the side line formed by the intersection of the top surface 102' and the first end surface 105 is a horizontal first straight line segment
Figure BDA0002875529280000071
I.e. the first straight line segment
Figure BDA0002875529280000072
The included angle between the horizontal plane and the horizontal plane is 0 degree. Top surface 102 'and the second end face 106' are inclined second straight line segment
Figure BDA0002875529280000073
Second straight line segment
Figure BDA0002875529280000074
An acute angle alpha exists between the first straight line section and the horizontal plane, and the second straight line section
Figure BDA0002875529280000075
Is greater than the second straight section
Figure BDA0002875529280000076
Is located radially inward of the end point E 'and has a height h'. The installation manner and the rotational direction of the counterweight 10 ″ are substantially the same as those in fig. 4.
In the embodiment shown in fig. 5, the difference from the embodiment shown in fig. 4 is that the outer peripheral surface 104 ″ is not a circumferential surface but a smoothly gradually changing curved surface. Specifically, the outer peripheral surface 104 ″ and the first end surface intersect to form a sideline
Figure BDA0002875529280000077
Is a vertical third straight line segment
Figure BDA0002875529280000078
The angle between the horizontal plane (e.g. sideline AB and third straight line segment)
Figure BDA0002875529280000079
The included angle formed is ≈ ABC) is a right angle of 90 degrees. The peripheral surface 104' is intersected with the second end surface to form a sideline
Figure BDA00028755292800000710
Is an inclined fourth straight line segment
Figure BDA00028755292800000711
With respect to the horizontal planeAn obtuse included angle theta exists between the two lines (such as a side line GH and a fourth straight line segment)
Figure BDA00028755292800000712
Angle formed ═ HGF ").
The outer peripheral surface 104 "has the following geometric configuration: an infinite number of imaginary sectional planes passing through a vertical rotational center axis (a vertical dot-dash line shown in fig. 5) of the weight intersect the outer peripheral surface 104 ″ to form respective intersecting lines, which are straight line segments, and an angle between the intersecting lines and a horizontal plane is formed from a third straight line segment
Figure BDA00028755292800000713
At a right angle of 90 degrees and gradually increases to a fourth straight line segment
Figure BDA00028755292800000714
At obtuse included angle theta. The size of the obtuse included angle θ is not particularly limited, and those skilled in the art can select an appropriate obtuse included angle θ according to actual needs, for example, θ is 107.3 degrees.
In the foregoing description, the first end face 105 and the second end faces 106, 106', 106 ″ are vertical planes formed by imaginary cut planes passing through the vertical rotational center axis of the weight. It will be understood by those skilled in the art that the first and second end faces 105, 106', 106 ″ may also take other shapes, such as a sloped inclined plane or a curved surface of a certain curvature, so long as the first straight line segment is made
Figure BDA00028755292800000715
And a second straight line segment
Figure BDA00028755292800000716
The extension line of the balance weight is intersected with the vertical rotation central axis of the balance weight.
On the other hand, the utility model provides a compressor. The compressor may be a scroll compressor, but is not limited to a scroll compressor. The scroll compressor has a crankshaft and a motor having a shaft extending in a vertical directionA stator cooperating with the rotor. The rotation of the rotor drives the rotation of the crankshaft. At the lower end of the rotor is mounted a counterweight 10 or 10' or 10 "according to the invention, wherein the bottom surface 101 of the counterweight cooperates with the rotor. It can be understood that the first straight line segment is in the direction of rotation (R) of the rotor and the counterweight
Figure BDA0002875529280000081
Located in the second straight line segment
Figure BDA0002875529280000082
Upstream side or front.
Alternatively, an end ring may be provided at the lower end of the rotor, with the bottom surface 101 of the weight engaging the lower end surface of the end ring. Optionally, the end ring is made of a cast aluminum material.
More specifically, a scroll compressor includes a first scroll assembly and a second scroll assembly. The crankshaft is connected with the first scroll assembly to drive the first scroll assembly to rotate. The first scroll assembly engages the second scroll assembly to form a compression chamber for compressing gas entering the scroll compressor. The crankshaft passes through an inner circumferential aperture of the counterbalance mass.
On the other hand, the utility model provides a compressor. The compressor has a crankshaft and a motor. The motor has a rotor extending in a vertical direction and a stator fitted with the rotor. The rotation of the rotor drives the rotation of the crankshaft. The balance weight 10 or 10' of the invention is arranged at the lower end of the crankshaft. The balance weight is positioned below the rotor. The balance weight is matched with the crankshaft through an inner circumferential hole of the balance weight. The counterbalance is mounted as: a first straight line segment in the rotation direction (R) of the crankshaft and the balance weight
Figure BDA0002875529280000083
Located in the second straight line segment
Figure BDA0002875529280000084
Upstream side or front.
Although in the foregoing, for the sake of brevity, a more detailed description or illustration of the balance weight and other components and/or configurations of the compressor of the present invention has been omitted, it is obvious and inevitable that these components and/or configurations are also part of the technical solution of the present invention, and it is not intended that the technical solution of the present invention does not include these components and/or configurations.
Fig. 6 shows the meshing of the scroll compressor in a finite element analysis of the cooling condition of the scroll compressor, wherein (a) part shows the meshing of the rotational region including the rotor and the balance mass inside the scroll compressor, and (B) part shows the meshing of the stationary region including the stator, the housing, and the like of the scroll compressor.
FIG. 7 shows the analysis result of the cooling condition of the scroll compressor, wherein part (A) shows the temperature distribution of the scroll compressor using the conventional balance block, and part (B) shows the temperature distribution of the scroll compressor using the balance block 10 of the present invention. (A) The two cases shown in parts (a) and (B) are identical in various setting conditions (e.g., component size, component material, fluid type, inflow pressure, mass flow rate, oil sump temperature, rotor speed, etc.) except for the different counterweights used in the scroll compressor. It can be seen from fig. 7 that the cooling condition of the scroll compressor using the balance weight 10 of the present invention is superior to that of the scroll compressor using the conventional balance weight.
The results of the finite element calculations are shown in table 1 below:
TABLE 1
Figure BDA0002875529280000091
As can be seen from table 1, the temperature of the rotor portion of the counterbalance according to the present invention is reduced by about 20K compared to the case of using the conventional counterbalance. Therefore, the technical scheme of the utility model is effectual.
Although the technical objects, technical solutions and technical effects of the present invention have been described in detail hereinabove with reference to specific embodiments, it should be understood that the above embodiments are only illustrative and not restrictive. Any modification, equivalent replacement, or improvement made by those skilled in the art within the spirit and principle of the present invention is included in the protection scope of the present invention.

Claims (13)

1. A weight (10; 10 ') which is generally semicircular and has a top surface (102; 102 '; 102 "), a bottom surface (101), an inner peripheral surface (103; 103 '), an outer peripheral surface (104; 104 '; 104"), a first end surface (105) and a second end surface (106; 106 '; 106 "), the bottom surface being a horizontal plane, the first end surface and the second end surface being located at both ends of the weight in a circumferential direction, respectively, characterized in that,
the top surface is a smooth gradually-changed inclined surface, wherein a sideline formed by intersecting the top surface and the first end surface
Figure FDA0002875529270000011
Or the line segment between the two end points of the sideline is a horizontal first straight line segment, so that the included angle between the first straight line segment and the horizontal plane is 0 degree; and is
A sideline formed by the intersection of the top surface and the second end surface
Figure FDA0002875529270000012
Or the line segment between the two end points of the side line is an inclined second straight line segment, an acute included angle (alpha) exists between the second straight line segment and the horizontal plane, and the height of the end point (F; F ') of the second straight line segment, which is positioned at the radial outer side, is larger than the height (h; h ') of the end point (E; E ') of the second straight line segment, which is positioned at the radial inner side.
2. The weight of claim 1, wherein the weight has a geometric configuration as follows: the imaginary intersecting lines of the sectional plane passing through the vertical rotation central axis of the balance weight and the top surface are all straight line segments, and the included angle between the intersecting lines and the horizontal plane is gradually increased from 0 degree at the first straight line segment to the acute angle included angle (alpha) at the second straight line segment.
3. The weight of claim 2, wherein the inner circumferential surface is a circumferential surface, and wherein the top surface intersects the inner circumferential surface to form a boundary line
Figure FDA0002875529270000013
Is an arc line, and the arc line and the first straight line segment are in the same horizontal plane.
4. The weight of claim 2, wherein the inner circumferential surface is a circumferential surface, and wherein the top surface intersects the inner circumferential surface to form a boundary line
Figure FDA0002875529270000014
Is a helix, and the helix angle (β) of the helix is an acute angle of not more than 45 degrees, such that the height (h ') of the end point (E; E') of the second straight section located radially inwards is greater than the height (h) of the end point of the first straight section.
5. The weight according to any one of claims 1 to 4, wherein the inner peripheral surface and the outer peripheral surface are concentric circumferential surfaces.
6. The weight according to any one of claims 1 to 4, wherein the outer peripheral surface is a smoothly gradually changing curved surface, wherein a side line formed by the intersection of the outer peripheral surface and the first end surface
Figure FDA0002875529270000021
Is a vertical third straight line section, and the included angle between the third straight line section and the horizontal plane is 90 degrees;
a sideline formed by intersecting the outer peripheral surface and the second end surface
Figure FDA0002875529270000022
Is an inclined fourth straight line segment, and an obtuse included angle (theta) is formed between the fourth straight line segment and the horizontal plane; and is
The peripheral surface has the following geometric configuration: the imaginary intersecting lines of the sectional plane passing through the vertical rotation central axis of the balance weight and the outer peripheral surface are straight line segments, and the included angle between the intersecting line and the horizontal plane is gradually increased from 90 degrees at the third straight line segment to the obtuse angle included angle (theta) at the fourth straight line segment.
7. A compressor having a crankshaft and an electric motor having a rotor extending in a vertical direction and a stator engaged with the rotor, the rotor rotationally driving the crankshaft to rotate, characterized in that,
a balance weight according to any one of claims 1 to 6 is mounted on the lower end of the rotor,
the weight is mounted to: the first straight line segment is located on the upstream side or in front of the second straight line segment in the rotation direction (R) of the rotor and the balance weight.
8. The compressor of claim 7, wherein a bottom surface of the weight engages a lower end surface of the rotor.
9. The compressor of claim 7, wherein an end ring is provided at a lower end of the rotor, and a bottom surface of the weight is engaged with a lower end surface of the end ring.
10. The compressor of claim 9, wherein the end ring is made of a cast aluminum material.
11. Compressor according to any one of claims 7 to 10,
the compressor is a scroll compressor including a first scroll assembly and a second scroll assembly,
wherein the crankshaft is connected with the first scroll assembly to drive the first scroll assembly to rotate, and the first scroll assembly is engaged with the second scroll assembly to form a compression chamber so as to compress gas entering the scroll compressor; and is
Wherein the crankshaft passes through an inner circumferential hole of the balance weight.
12. A compressor having a crankshaft and an electric motor having a rotor extending in a vertical direction and a stator engaged with the rotor, the rotor rotationally driving the crankshaft to rotate, characterized in that,
a balance weight according to any one of claims 1 to 6 mounted on a lower end of the crankshaft, the balance weight being fitted to the crankshaft through an inner circumferential hole thereof;
the weight is mounted to: the first straight line segment is located on an upstream side or in front of the second straight line segment in a rotational direction (R) of the crankshaft and the balance weight.
13. The compressor of claim 12,
the compressor is a scroll compressor including a first scroll assembly and a second scroll assembly,
wherein the crankshaft is connected with the first scroll assembly to drive the first scroll assembly to rotate, and the first scroll assembly is engaged with the second scroll assembly to form a compression chamber so as to compress gas entering the scroll compressor; and is
Wherein the balance weight is located below the rotor.
CN202023329356.XU 2020-12-30 2020-12-30 Balancing piece and compressor Active CN214577718U (en)

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DE202021106915.5U DE202021106915U1 (en) 2020-12-30 2021-12-20 counterweight and compressor

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114301224A (en) * 2021-12-28 2022-04-08 湖南汤普悦斯压缩机科技有限公司 Water drop-shaped balance block, rotor and compressor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114301224A (en) * 2021-12-28 2022-04-08 湖南汤普悦斯压缩机科技有限公司 Water drop-shaped balance block, rotor and compressor
CN114301224B (en) * 2021-12-28 2024-02-27 湖南汤普悦斯压缩机科技有限公司 Drop-shaped balance block, rotor and compressor

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