Compressor balance block, motor assembly and rotary compressor

Abstract

The invention relates to the technical field of compressors, in particular to a compressor balance block, a motor assembly comprising the compressor balance block and a rotary compressor comprising the motor assembly. The compressor balance block comprises an installation ring and a balancing weight arranged on the installation ring, the installation ring is used for being connected with a motor rotor, the interior of the installation ring is through in the axial direction, the balancing weight is located on the peripheral side of the installation ring, and a gap is formed between the balancing weight and the installation ring. The balancing weight and the mounting ring are relatively independent, the balancing weight is only connected and assembled by the mounting ring and the motor rotor, and mounting holes do not need to be formed in the balancing weight, so that the sizes of the balancing weight and the mounting ring can be correspondingly reduced, and the weight of the balancing weight of the compressor is reduced; meanwhile, the distance of the balancing weight deviating from the center of the mounting ring is increased, namely, the eccentricity of the balancing weight and the center of the mounting ring is increased, and therefore the considerable balance amount and the vibration reduction effect can still be achieved under the condition that the weight of the balancing weight is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and particularly to a compressor balance weight, an electric motor assembly including the compressor balance weight, and a rotary compressor including the electric motor assembly. Background Art

[0002] Conventional rotary compressors mainly use the rotation of a crankshaft with an eccentric shaft to make the compression mechanism work to achieve the compression process. The rotation of the crankshaft is driven by the motor rotor. Due to the eccentricity of the crankshaft, imbalance will occur during operation, causing the compressor to vibrate and generate noise. Therefore, balance weights need to be installed at both ends of the motor rotor to balance and eliminate the imbalance generated during the operation of the crankshaft, thereby reducing or eliminating the vibration and noise of the compressor.

[0003] As Figure 1 shown, in the prior art, for the compressor balance weight, both the counterweight portion 01 and the mounting portion 02 for connecting the motor rotor are provided on one end face of the annular cover plate 03, and the cover plate 03 covers the counterweight portion 01 and the mounting portion 02, which has the effect of facilitating assembly and blocking lubricating oil. The mounting portion 02 is a plurality of mounting holes evenly arranged along the circumferential direction of the cover plate 03, and one or more of the mounting holes are provided on the counterweight portion 01. Since the counterweight portion 01 needs to be provided with mounting holes, the counterweight portion 01 needs to have a certain thickness and width redundancy, resulting in a relatively heavy and large-sized compressor balance weight. Although the heavy and large-sized compressor balance weight can make the vibration of the compressor relatively small, it has the defects of high cost and being not conducive to product promotion. Summary of the Invention

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a compressor balance weight that reduces weight and can maintain the vibration reduction effect.

[0005] To solve the above technical problem, the present invention adopts the following technical solutions:

[0006] The present invention provides a compressor balance weight, including a mounting ring and a counterweight block provided on the mounting ring. The mounting ring is used to be connected to the motor rotor, the interior of the mounting ring is axially penetrated, the counterweight block is located on the outer peripheral side of the mounting ring, and a gap is formed between the counterweight block and the mounting ring at intervals.

[0007] Preferably, mounting terminals are provided on the outer peripheral surface of the mounting ring. The mounting terminals are used to connect the motor rotor, and the counterweight block is provided on the outer side surface of the mounting terminal away from the mounting ring.

[0008] Preferably, mounting holes for connecting the motor rotor are provided on the mounting terminals, and the axis of the mounting holes is parallel to the axis of the mounting ring.

[0009] Preferably, both ends of the counterweight are respectively connected to an installation terminal, and the two installation terminals are arranged at intervals along the circumferential direction of the installation ring. The counterweight is located in the angular region formed by the centers of the installation holes of the two installation terminals and the center of the installation ring.

[0010] Preferably, a plurality of installation terminals are arranged at intervals along the circumferential direction on the outer peripheral surface of the installation ring, and the counterweight is connected to at least two installation terminals.

[0011] Preferably, the installation ring, the installation terminal and the counterweight all have a first end face and a second end face opposite to each other along the axial direction of the installation ring. The first end face of the counterweight, the first end face of the installation terminal and the first end face of the installation ring are located on the same plane. The second end face of the counterweight and the second end face of the installation terminal both protrude from the second end face of the installation ring and are located on the same plane.

[0012] Preferably, the installation ring, the installation terminal and the counterweight are integrally formed as a whole.

[0013] Preferably, the installation ring is in a circular ring shape, the counterweight is in an arc shape, and the counterweight is coaxially arranged with the installation ring.

[0014] The present invention also provides a motor assembly, including a motor rotor and the compressor balance weight as described above, and the installation ring is connected to the motor rotor.

[0015] The present invention also provides a rotary compressor, including the motor assembly as described above.

[0016] Compared with the prior art, the present invention has significant progress:

[0017] For the compressor balance weight of the present invention, by arranging the counterweight on the outer peripheral side of the installation ring and leaving a gap between the counterweight and the installation ring, the counterweight and the installation ring are relatively independent. Only the installation ring is connected and assembled with the motor rotor, so there is no need to provide installation holes on the counterweight. Thus, the sizes of both the counterweight and the installation ring can be reduced accordingly, realizing the weight reduction of the compressor balance weight. At the same time, since the counterweight is arranged on the outer peripheral side of the installation ring and there is a gap between the counterweight and the installation ring, the distance of the counterweight deviating from the center of the installation ring is increased, that is, the eccentricity of the counterweight and the center of the installation ring is increased. Therefore, a considerable balance amount and vibration damping effect can still be achieved under the condition of weight reduction of the counterweight. Compared with the prior art, the compressor balance weight of the present invention can achieve a weight reduction of more than 60% on the premise that the balance amount is equivalent and the actual vibration of the compressor is equivalent, having an excellent weight reduction effect and being able to significantly reduce costs. Description of the Drawings

[0018] Figure 1 is a structural schematic diagram of a compressor balance weight in the prior art.

[0019] Figure 2It is a schematic structural diagram of an implementation manner of the compressor balance weight according to an embodiment of the present invention.

[0020] Figure 3 is Figure 2 The front view schematic diagram of the compressor balance weight shown.

[0021] Figure 4 is Figure 2 The left view schematic diagram of the compressor balance weight shown.

[0022] Figure 5 It is the front view schematic diagram of another implementation manner of the compressor balance weight according to an embodiment of the present invention.

[0023] Among them, the reference numerals are explained as follows:

[0024] 01 Counterweight part

[0025] 02 Installation part

[0026] 03 Cover plate

[0027] 1 Mounting ring

[0028] 1a The first end face of the mounting ring

[0029] 1b The second end face of the mounting ring

[0030] 11 Mounting terminal

[0031] 11a The first end face of the mounting terminal

[0032] 11b The second end face of the mounting terminal

[0033] 12 Mounting hole

[0034] 2 Counterweight

[0035] 2a The first end face of the counterweight

[0036] 2b The second end face of the counterweight

[0037] 3 Gap Specific embodiments

[0038] The following further details the specific embodiments of the present invention with reference to the accompanying drawings. These embodiments are only used to illustrate the present invention and are not intended to limit the present invention.

[0039] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, in the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0042] As Figures 2 to 5 shown, it is an embodiment of the compressor balance weight of the present invention.

[0043] Refer to Figure 2 and Figure 3 , the compressor balance weight of this embodiment includes a mounting ring 1 and a counterweight 2. The mounting ring 1 is used to connect with the motor rotor to assemble the compressor balance weight of this embodiment with the motor rotor. The compressor balance weight of this embodiment can be installed at both ends of the motor rotor. The interior of the mounting ring 1 is axially penetrated to avoid the driving shaft of the motor rotor. The counterweight 2 is arranged on the mounting ring 1. The counterweight 2 is located on the outer peripheral side of the mounting ring 1, and a gap 3 is formed at an interval between the counterweight 2 and the mounting ring 1.

[0044] In this embodiment, the balance weight of the compressor is such that the counterweight 2 is arranged on the outer peripheral side of the mounting ring 1 with a gap 3 left between the counterweight 2 and the mounting ring 1, making the counterweight 2 relatively independent of the mounting ring 1. Since only the mounting ring 1 is connected and assembled with the motor rotor, there is no need to provide mounting holes on the counterweight 2. As a result, the sizes of both the counterweight 2 and the mounting ring 1 can be correspondingly reduced, achieving weight reduction of the compressor balance weight. At the same time, since the counterweight 2 is arranged on the outer peripheral side of the mounting ring 1 with a gap 3 left between the counterweight 2 and the mounting ring 1, the distance of the counterweight 2 from the center of the mounting ring 1 is increased, that is, the eccentricity between the counterweight 2 and the center of the mounting ring 1 is increased. Therefore, a considerable balance amount and vibration damping effect can still be achieved under the condition of weight reduction of the counterweight 2. Compared with the prior art, the compressor balance weight of this embodiment can achieve a weight reduction of more than 60% on the premise that the balance amount is equivalent and the actual vibration of the compressor is equivalent, having an excellent weight reduction effect and being able to significantly reduce costs.

[0045] In this embodiment, preferably, mounting terminals 11 are provided on the outer peripheral surface of the mounting ring 1. The mounting terminals 11 are used to connect to the motor rotor, that is, the mounting ring 1 is connected to the motor rotor through the mounting terminals 11. The counterweight 2 is arranged on the outer side surface of the mounting terminal 11 away from the mounting ring 1, such that a gap 3 is formed at an interval between the counterweight 2 and the mounting ring 1. Since the mounting ring 1 is connected to the motor rotor through the mounting terminals 11 provided on the outer peripheral surface of the mounting ring 1, there is no need to provide mounting holes on the annular body of the mounting ring 1, thereby further reducing the radial extension dimension of the annular body of the mounting ring 1 and increasing the weight reduction effect.

[0046] Preferably, mounting holes 12 for connecting to the motor rotor are provided on the mounting terminals 11. The mounting holes 12 are through holes penetrating the mounting terminals 11, and the axis of the mounting holes 12 is parallel to the axis of the mounting ring 1, so as to facilitate coaxial assembly of the mounting ring 1 and the motor rotor.

[0047] In this embodiment, preferably, both ends of the counterweight 2 are respectively connected to one mounting terminal 11. Both ends of the counterweight 2 refer to the two ends of the counterweight 2 that are opposite to each other in the circumferential direction of the mounting ring 1. The two mounting terminals 11 connected to both ends of the counterweight 2 are arranged at intervals in the circumferential direction of the mounting ring 1, and the counterweight 2 is located in the angular region formed by the centers of the mounting holes 12 of the two mounting terminals 11 and the center of the mounting ring 1. Refer to Figure 3 and Figure 5 , the included angle formed by both ends of the counterweight 2 and the center of the mounting ring 1 is θ1, and the included angle formed by the centers of the mounting holes 12 of the two mounting terminals 11 connected to both ends of the counterweight 2 and the center of the mounting ring 1 is θ2. The included angle θ1 is within the included angle θ2, satisfying: 0 ≤ θ1 ≤ θ2. Among them, Figure 3 the shown embodiment is θ1 = θ2, Figure 5The shown embodiment is θ1 < θ2. Of course, the connection manner between the two ends of the counterweight 2 and the mounting ring 1 or the mounting terminal 11 is not limited to this, and can be designed according to actual application requirements on the premise of not interfering with the structural components of the motor assembly.

[0048] In this embodiment, preferably, a plurality of mounting terminals 11 are circumferentially and spacedly arranged on the outer peripheral surface of the mounting ring 1. For example, Figure 3 and Figure 5 are shown as four in the figure. The number of the mounting terminals 11 is not limited and can be designed according to actual application requirements. The plurality of mounting terminals 11 are preferably evenly and spacedly arranged along the circumference of the mounting ring 1. The counterweight 2 is connected to at least two mounting terminals 11, and it is optimal that the two ends of the counterweight 2 are respectively connected to one mounting terminal 11. According to the extension dimension of the counterweight 2 in the circumferential direction of the mounting ring 1, there can also be a mounting terminal 11 connected to the counterweight 2 between the two ends of the counterweight 2.

[0049] Refer to Figure 4 , in the compressor balance block of this embodiment, the mounting ring 1, the mounting terminal 11, and the counterweight 2 all have a first end face and a second end face that are axially opposite to each other along the mounting ring 1. For the convenience of assembling the compressor balance block with the motor rotor and adapting to the motor assembly, preferably, the first end face 2a of the counterweight, the first end face 11a of the mounting terminal, and the first end face 1a of the mounting ring are located on the same plane. The second end face 2b of the counterweight and the second end face 11b of the mounting terminal both protrude from the second end face 1b of the mounting ring, and moreover, the second end face 2b of the counterweight and the second end face 11b of the mounting terminal are located on the same plane.

[0050] In this embodiment, preferably, the mounting ring 1, the mounting terminal 11, and the counterweight 2 are integrally formed as a whole.

[0051] In this embodiment, preferably, the mounting ring 1 is in a circular ring shape, the counterweight 2 is in an arc shape, and the counterweight 2 is coaxially arranged with the mounting ring 1. Of course, the counterweight 2 is not limited to the arc shape and can also adopt other adaptable shapes.

[0052] Based on the above compressor balance block, an embodiment of the present invention further provides a motor assembly. The motor assembly of this embodiment includes a motor rotor and the compressor balance block described above in this embodiment. The mounting ring 1 of the compressor balance block is connected to the motor rotor. The motor assembly can achieve the effect of blocking lubricating oil by covering the compressor balance block with a stainless steel oil baffle. Specifically, the stainless steel oil baffle can cover the first end face 2a of the counterweight, the first end face 11a of the mounting terminal, and the first end face 1a of the mounting ring.

[0053] Based on the above motor assembly, an embodiment of the present invention further provides a rotary compressor. The rotary compressor of this embodiment includes the above motor assembly of this embodiment. In addition, it further includes a compression mechanism. The compression mechanism can be a conventional compression mechanism. The operation of the compression mechanism is driven by the above motor assembly of this embodiment to achieve the compression process, and the compressor balance block connected to the motor rotor is used to balance and eliminate the imbalance generated during the operation of the compression mechanism, thereby weakening or eliminating the vibration and noise of the rotary compressor.

[0054] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A compressor balance weight, characterized in that, It includes a mounting ring (1) and a counterweight (2) provided on the mounting ring (1). The mounting ring (1) is used to connect with the motor rotor. The interior of the mounting ring (1) is axially through. The counterweight (2) is located on the outer peripheral side of the mounting ring (1), and a gap (3) is formed at an interval between the counterweight (2) and the mounting ring (1).

2. The compressor balance weight according to claim 1, characterized in that, Mounting terminals (11) are provided on the outer peripheral surface of the mounting ring (1). The mounting terminals (11) are used to connect the motor rotor. The counterweight (2) is provided on the outer side surface of the mounting terminal (11) away from the mounting ring (1).

3. The compressor balance weight according to claim 2, characterized in that, Mounting holes (12) for connecting the motor rotor are formed in the mounting terminals (11). The axis of the mounting holes (12) is parallel to the axis of the mounting ring (1).

4. The compressor balance weight according to claim 3, characterized in that, Both ends of the counterweight (2) are respectively connected to one of the mounting terminals (11). The two mounting terminals (11) are arranged at intervals along the circumferential direction of the mounting ring (1). The counterweight (2) is located in the angular region formed by the centers of the mounting holes (12) of the two mounting terminals (11) and the center of the mounting ring (1).

5. The compressor balance weight according to claim 2, characterized in that, A plurality of the mounting terminals (11) are provided at intervals along the circumferential direction on the outer peripheral surface of the mounting ring (1). The counterweight (2) is connected to at least two of the mounting terminals (11).

6. The compressor balance weight according to claim 2, characterized in that, The mounting ring (1), the mounting terminals (11) and the counterweight (2) all have a first end face and a second end face opposite to each other along the axis of the mounting ring (1). The first end face (2a) of the counterweight, the first end face (11a) of the mounting terminal and the first end face (1a) of the mounting ring are located on the same plane. The second end face (2b) of the counterweight and the second end face (11b) of the mounting terminal both protrude from the second end face (1b) of the mounting ring and are located on the same plane.

7. The compressor balance weight according to claim 2, characterized in that, The mounting ring (1), the mounting terminals (11) and the counterweight (2) are integrally formed as a whole part.

8. The compressor balance weight according to claim 1, characterized in that, The mounting ring (1) is in a circular ring shape, the counterweight (2) is in an arc shape, and the counterweight (2) is coaxially arranged with the mounting ring (1).

9. An electric motor assembly, characterized in that, It includes a motor rotor and a compressor balance weight as described in any one of claims 1 to 8. The mounting ring (1) is connected to the motor rotor.

10. A rotary compressor, characterized in that, It includes a motor assembly as described in claim 9.

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