CN217135235U - Motor stator and compressor with same - Google Patents
Motor stator and compressor with same Download PDFInfo
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- CN217135235U CN217135235U CN202122718190.9U CN202122718190U CN217135235U CN 217135235 U CN217135235 U CN 217135235U CN 202122718190 U CN202122718190 U CN 202122718190U CN 217135235 U CN217135235 U CN 217135235U
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Abstract
The utility model discloses a motor stator and have its compressor. The motor stator includes: the stator comprises a stator body, wherein the stator body is of a columnar structure, the peripheral surface of the stator body alternately forms arc surfaces and tangent planes along the circumferential direction, and the arc surfaces and the tangent planes respectively penetrate to two ends of a cylindrical structure along the direction parallel to the axial direction of the cylindrical structure; the stator body is provided with a silencing channel, the silencing channel is arranged on the cambered surface, and two ends of the silencing channel are respectively arranged to two adjacent tangent planes; wherein: gas flowing through the muffling channel can interfere with gas flowing through the tangential plane to attenuate the resulting gas sound wave. The motor stator in this embodiment adds and establishes the noise elimination passageway, can realize the noise reduction effect to the whole noise of compressor after cooperating with the compressor casing.
Description
Technical Field
The utility model relates to a compressor noise reduction technical field especially relates to a motor stator and have its compressor.
Background
At present, the closed refrigeration compressor is widely applied to refrigeration air-conditioning systems, in particular to small refrigeration air-conditioning appliances. The accompanying drawings 1-2 are schematic diagrams of the structure of the compressor: in the closed shell, a pump body for completing the refrigerant compression function, a motor for generating power, a driving shaft for transmitting power to the pump body and an air suction and exhaust pipe for facilitating the refrigerant to enter and exit the shell are arranged. Typically, the pump body is welded or mechanically (pins or screws) attached to the housing; the motor stator is sleeved on the inner circle of the shell in a hot mode; the driving shaft is sleeved on the motor rotor in a thermal mode. The hermetic compressor can be divided into a high back pressure compressor and a low back pressure compressor according to the pressure of the refrigerant in the shell. The high back pressure compressor is a refrigerant with a relatively high pressure in a shell when the compressor works. In this compressor, a low-pressure refrigerant from the system evaporator is directly sucked into the pump body through the suction pipe, compressed and discharged into the interior of the compressor housing, and then the refrigerant passes through the motor and is discharged out of the compressor through the discharge pipe, and the solid arrows in fig. 1 to 2 indicate the direction (from bottom to top) in which the refrigerant flows through the motor. The low-back-pressure compressor is a compressor in which a low-pressure refrigerant is introduced from an evaporator of the system into the casing through an air intake pipe, the refrigerant flows through a motor and is then introduced into a pump body, and the high-pressure refrigerant compressed by the pump body is directly discharged from the compressor. The dashed arrows in fig. 1-2 indicate the direction of refrigerant flow through the motor (from top to bottom), and the motor stator, which is heat-fitted to the compressor housing, is substantially cylindrical in shape. Referring to the sectional view of fig. 1 a-a, the inner side of the stator is a cylindrical surface, but the outer side of the stator is cut on the basis of the cylindrical surface, and the purpose is to leave a channel for a refrigerant to pass through between the outer side surface of the stator and the shell of the compressor. Fig. 3-4 show a simple stator structure principle of the motor, in fig. 3-4, 4 tangential planes (1, 2, 3, 4) are uniformly distributed on the outer side of the stator, and 4 gas channels are formed between the stator and the shell of the compressor; 4 motor cambered surfaces (a, b, c and d) are also uniformly distributed and form holding force with a thermal sleeve between the motor cambered surfaces and a shell of the compressor. In view of noise of the compressor, the gas noise is an important source of noise of the whole compressor, and the aerodynamic noise generated when the refrigerant gas flows in the compressor is an important component of the gas noise. The reduction of the noise of the whole compressor is always the subject of the related technical researchers.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model discloses a motor stator for solve the big problem of current compressor noise at least.
The utility model discloses a realize foretell target, the technical scheme of adoption is:
the utility model discloses a first aspect discloses a motor stator, motor stator includes: a stator body, a stator core and a stator core,
the stator body adopts a columnar structure,
the stator comprises a stator body and a stator core, wherein the outer peripheral surface of the stator body alternately forms arc surfaces and tangent planes along the circumferential direction, and the arc surfaces and the tangent planes respectively penetrate through two ends of a cylindrical structure along the direction parallel to the axial direction of the cylindrical structure;
the stator body is provided with a silencing channel, the silencing channel is arranged on the cambered surface, and two ends of the silencing channel are respectively arranged to two adjacent tangent planes;
wherein: gas flowing through the sound attenuation channel can interfere with gas flowing through the tangent plane to attenuate the resultant gas sound wave.
Further optionally, the distance from the lowest point of the silencing channel to the bottom end of the stator body is H, and the value range of H is 1/3H Stator body ～2/3H Stator body In which H is Stator body Is the height of the stator body.
Further optionally, the distance H from the lowest point of the silencing channel to the bottom end of the stator body is 1/2H Stator body 。
Further optionally, each arc surface is provided with at least one silencing channel.
Further optionally, the sound attenuation channel is along the circumferential direction of the columnar structure.
Further optionally, the length L of the sound attenuation channel satisfies: l is (2n +1) × C/(2f), where C is the sound velocity determined according to the refrigerant pressure P and the temperature T, f is the frequency of the gas noise to be attenuated, and n is a natural number.
Further optionally, the width W of the sound-damping channel 1 The range is as follows: 0.1H-0.5H, wherein H is the distance from the lowest point of the silencing channel to the bottom end of the stator body.
Further optionally, on an expansion plane of the arc surface on which the noise elimination channel is formed, a preset included angle α is formed between the forming direction corresponding to the noise elimination channel and the circumferential direction of the columnar structure, and the preset included angle α is an acute angle.
Further optionally, the length L2 of the muffling channel satisfies: l2 is (2n +1) × C/(2f) + L1-L3, where C is the sound velocity determined according to the refrigerant pressure P and the temperature T, f is the frequency of the gas noise to be reduced, n is a natural number, L1 is the distance from the first end of the muffling channel to the top end of the stator body, and L3 is the distance from the second end of the muffling channel to the top end of the stator body.
Further optionally, the width W of the sound-damping channel 2 The range is as follows: 0.1H-0.5H, wherein H is the distance from the lowest point of the silencing channel to the bottom end of the stator body.
Further optionally, the number of the tangent planes and the arc surfaces is 4.
The utility model discloses a second aspect discloses a compressor, the compressor includes: the motor stator of any preceding claim.
Further optionally, the compressor further comprises:
the compressor shell is sleeved on the outer side of the motor stator, the inner wall of the compressor shell is matched with the tangent plane to form a gas channel, and the noise elimination channel can be communicated with two adjacent gas channels;
the rotor is sleeved on the driving shaft;
the center of the motor stator is provided with a through hole, and the rotor is movably arranged in the through hole in a penetrating mode.
Has the advantages that: the utility model provides a motor stator is last to set up the noise elimination passageway, can shunt the refrigerant gas through certain motor airflow channel, divide into two tunnel sound waves with it, through reasonable noise elimination channel structure design for the wave journey difference of these two tunnel sound waves satisfies opposite phase's requirement just, thereby reaches the purpose that these two tunnel sound waves weaken each other, reduce the gas sound.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without inventive efforts.
FIG. 1 shows a schematic diagram of a hermetically sealed refrigeration compressor of the prior art;
FIG. 2 shows a cross-sectional view of a prior art hermetically sealed refrigerant compressor configuration;
figure 3 shows a schematic view (top view) of the stator structure of an electrical machine of prior design;
figure 4 shows a schematic view of the structure of a motor stator of the prior art design (front view);
FIG. 5 illustrates a schematic view of a stator structure of the motor in accordance with one embodiment;
FIG. 6 illustrates an oblique view of a stator of an electric machine of an embodiment;
FIG. 7 illustrates a gas flow pattern during sound attenuation according to one embodiment;
FIG. 8 shows an oblique view of a muffler channel design of another embodiment;
fig. 9 shows a schematic structural diagram of a stator of a motor according to another embodiment.
In the figure: 1. a stator body; 11. cutting a plane; 12. a cambered surface; 13. a sound-deadening channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two, but does not exclude the presence of at least one.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
The noise when current compressor work is great. The utility model discloses in improve through the motor stator to the compressor, utilize and design one or more noise elimination passageway on motor stator's arc surface, can realize the noise elimination to a plurality of gas noise target frequency to reduce compressor complete machine noise, satisfy the requirement of compressor silence ization.
To further illustrate the technical solution of the present invention, the following specific examples are provided with reference to fig. 5 to 9.
Example 1
As shown in fig. 5 to 7, a motor stator is provided in the present embodiment. The number of the tangent planes 11 and the cambered surfaces 12 of the motor stator is 4. It should be noted that the number of the tangent planes 11 and the arc surfaces 12 may be 2, 3, 5, 6, or other numbers.
The motor stator includes: a stator body 1. The stator body 1 adopts a columnar structure. The outer peripheral surface of the stator body 1 is alternately provided with an arc surface 12 and a tangent plane 11, and the arc surface 12 and the tangent plane 11 respectively penetrate through the two ends of the columnar structure along the direction parallel to the axial direction of the columnar structure; the stator body 1 is provided with a silencing channel 13, the silencing channel 13 is arranged on the cambered surface 12, and two ends of the silencing channel 13 are respectively arranged to two adjacent tangent planes 11; wherein: the gas flowing through the sound-deadening passageway 13 may interfere with the gas flowing through the tangential plane 11 to attenuate the resultant gas sound wave.
The utility model discloses improve to motor stator to carry out configuration optimization with airflow channel between motor stator and the compressor housing, reach the purpose that subducts the gas noise. The principle is that according to the wave interference theory, a gas measuring channel is communicated by a silencing channel 13, so that refrigerant gas in the gas channel generates two beams of coherent waves, when the phase difference meets a certain condition, the synthesized sound waves have the effect of mutual weakening, and the most ideal condition is that the sound pressure of the synthesized waves is zero.
Preferably, the distance from the lowest point of the silencing channel 13 to the bottom end of the stator body 1 is H, and the value range of H is 1/3H Stator body ～2/3H Stator body In which H is Stator body Is the height of the stator body 1. Further preferably, the distance H from the lowest point of the sound attenuation channel 13 to the bottom end of the stator body 1 is 1/2H Stator body 。
In this embodiment, each of the arc surfaces 12 is provided with at least one sound attenuation channel 13. It should be noted that, when a plurality of sound-absorbing channels 13 are disposed on each arc surface 12, the distance between the lowest point of the sound-absorbing channel 13 and the bottom end of the stator body 1 can be adjusted according to the specific structure. Optionally: the plurality of sound attenuation channels 13 on each cambered surface 12 are mutually parallel. At the moment, refrigerant gas passing through an airflow channel of a certain motor is divided into multiple paths of sound waves, and the wave path difference of the multiple paths of sound waves just meets the requirement of opposite phases through proper channel structure design, so that the purposes of weakening the two paths of sound waves mutually and reducing gas sound are achieved.
In some optional modes, parallel silencing channels 13 are arranged on one or more motor cambered surfaces 12. Namely: the sound-deadening channel 13 is along the circumferential direction of the columnar structure. At this time, the length L of the muffler passage 13 satisfies: l is (2n +1) × C/(2f), where C is the sound velocity determined according to the refrigerant pressure P and the temperature T, f is the frequency of the gas noise to be attenuated, and n is a natural number. Width W of the sound-deadening channel 13 1 The range is as follows: 0.1H-0.5H, wherein H is the distance from the lowest point of the silencing channel 13 to the bottom end of the stator body 1.
In some optional ways, as shown in fig. 8-9, an inclined sound-damping channel 13 is opened on one or more motor arc surfaces 12. Namely: on the spreading plane of the cambered surface 12 provided with the noise elimination channel 13, a preset included angle alpha is formed between the corresponding opening direction of the noise elimination channel 13 and the circumferential direction of the columnar structure, and the preset included angle alpha is an acute angle. At this time, the length L2 of the muffler passage 13 satisfies: l2 is (2n +1) × C/(2f) + L1-L3, where C is the sound velocity determined according to the refrigerant pressure P and the temperature T, f is the frequency of the gas noise to be attenuated, n is a natural number, L1 is the distance from the first end of the sound attenuation channel 13 to the top end of the stator body 1, and L3 is the distance from the second end of the sound attenuation channel 13 to the top end of the stator body 1. Width W of the sound-deadening channel 13 2 The range is as follows: 0.1H-0.5H, wherein H is the distance from the lowest point of the silencing channel 13 to the bottom end of the stator body 1.
Example 2
In this embodiment, there is provided a compressor including: the stator for an electric machine according to any of embodiment 1. In addition, the compressor further includes: the compressor shell is sleeved on the outer side of the motor stator, the inner wall of the compressor shell is matched with the tangent plane 11 to form a gas channel, and the silencing channel 13 can be communicated with two adjacent gas channels; the rotor is sleeved on the driving shaft; wherein, the center of the motor stator is provided with a through hole, and the rotor can movably penetrate through the through hole.
Specifically, referring to fig. 5 and 6, a groove-shaped noise elimination channel 13 is formed on the motor arc surface 12 (see fig. 5), and the channel communicates with refrigerant gas channels corresponding to two adjacent tangent planes 11. L is the length of the sound-damping channel 13, W is the width of the channel, and H is the height of the channel from the bottom end of the stator. The determination method of L is as follows:
for a specific refrigerant, under the condition of a certain pressure P and temperature T, the sound velocity C is determined and is denoted as C (P, T). The frequency of the gas noise that needs to be attenuated is designated as f,
f ═ 2n +1 × C/(2L) (formula 1)
In the formula: n is 0, 1, 2, 3, …
C is sound velocity, and C (P, T) is determined according to the pressure and the temperature of the refrigerant; l is the length of the sound-deadening channel 13.
As can be seen from the above formula, the frequency f is a plurality of discontinuous values
From the above equation, the sound attenuation frequency f may be known to obtain the channel length L, or the channel length L may be known to obtain the sound attenuation frequency f.
It should be noted that: the width W of the channel mainly influences the noise elimination quantity and the flow pressure loss of the refrigerant, and is not suitable to be too small; the channel height H is preferably about 1/2 motor stator height.
In addition, the muffling channel 13 can also be designed to have an inclined structural shape, as shown in fig. 8 and 9, and the structural parameters thereof need to satisfy the following formula:
(2n +1) × C/(2 × (L2+ L3-L1)) (formula 2)
In the formula: n is 0, 1, 2, 3, …
C is sound velocity, and C (P, T) is determined according to the pressure and temperature of the refrigerant
L1 is the distance from the first end of the sound attenuation channel 13 to the top end of the stator body 1; l2 is the length of the sound attenuation channel 13 when the sound attenuation channel 13 is obliquely arranged; l3 is the distance from the second end of the sound attenuation channel 13 to the top end of the stator body 1.
It should be noted that, the other arc surfaces 12 of the motor stator may also be provided with a sound attenuation channel 13, for example, four arc surfaces of the motor are provided with one sound attenuation channel 13, and there are 4 sound attenuation channels 13. Different structural parameters can be selected according to the formula, and accurate noise elimination of a plurality of gas noise frequencies can be realized. The number of the motor stator tangent planes 11 and whether the motor stator tangent planes are uniformly distributed can be changed according to design requirements.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (13)
1. An electric machine stator, comprising: a stator body, a stator core and a stator core,
the stator body adopts a columnar structure,
the stator comprises a stator body and a stator core, wherein the outer peripheral surface of the stator body alternately forms arc surfaces and tangent planes along the circumferential direction, and the arc surfaces and the tangent planes respectively penetrate through two ends of a cylindrical structure along the direction parallel to the axial direction of the cylindrical structure;
the stator body is provided with a silencing channel, the silencing channel is arranged on the cambered surface, and two ends of the silencing channel are respectively arranged to two adjacent tangent planes;
wherein: gas flowing through the sound attenuation channel can interfere with gas flowing through the tangent plane to attenuate the resultant gas sound wave.
2. The stator of claim 1, wherein the lowest point of the muffling channel is at a distance H from the bottom end of the stator body, wherein H has a value in the range of 1/3H Stator body ～2/3H Stator body In which H is Stator body Is the height of the stator body.
3. The stator of claim 2 wherein the lowest point of said muffling channel is spaced from said statorThe distance H of the bottom end of the sub-body is 1/2H Stator body 。
4. The stator as claimed in claim 1, wherein each of the arc surfaces has at least one of the sound-deadening channels formed therein.
5. The electric machine stator of claim 1, wherein the sound-deadening channel is along a circumferential direction of the columnar structure.
6. The stator of an electric machine according to claim 5, wherein the length L of the muffling channel satisfies: l is (2n +1) × C/(2f), where C is the sound velocity determined according to the refrigerant pressure P and the temperature T, f is the frequency of the gas noise to be attenuated, and n is a natural number.
7. The electric machine stator of claim 5, wherein the width W of the sound-damping channel 1 The range is as follows: 0.1H-0.5H, wherein H is the distance from the lowest point of the silencing channel to the bottom end of the stator body.
8. The motor stator as claimed in claim 1, wherein on a development plane of the arc surface on which the sound-deadening channel is formed, a preset included angle α is formed between a corresponding forming direction of the sound-deadening channel and the circumferential direction of the columnar structure, and the preset included angle α is an acute angle.
9. The stator of an electric machine according to claim 8, wherein the length L2 of the muffling channel satisfies: l2 is (2n +1) × C/(2f) + L1-L3, where C is the sound velocity determined according to the refrigerant pressure P and the temperature T, f is the frequency of the gas noise to be reduced, n is a natural number, L1 is the distance from the first end of the muffling channel to the top end of the stator body, and L3 is the distance from the second end of the muffling channel to the top end of the stator body.
10. The electric machine stator of claim 9, wherein the noise damper channelWidth W of track 2 The range is as follows: 0.1H-0.5H, wherein H is the distance from the lowest point of the silencing channel to the bottom end of the stator body.
11. A motor stator according to any of claims 1-9, wherein the number of said tangent planes and said arc-shaped surfaces is 4.
12. A compressor, characterized in that the compressor comprises: a motor stator according to any one of claims 1 to 11.
13. The compressor of claim 12, further comprising:
the compressor shell is sleeved on the outer side of the motor stator, the inner wall of the compressor shell is matched with the tangent plane to form a gas channel, and the silencing channel can be communicated with two adjacent gas channels;
the rotor is sleeved on the driving shaft;
the center of the motor stator is provided with a through hole, and the rotor is movably arranged in the through hole in a penetrating mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122718190.9U CN217135235U (en) | 2021-11-08 | 2021-11-08 | Motor stator and compressor with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122718190.9U CN217135235U (en) | 2021-11-08 | 2021-11-08 | Motor stator and compressor with same |
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| Publication Number | Publication Date |
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| CN217135235U true CN217135235U (en) | 2022-08-05 |
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| CN202122718190.9U Active CN217135235U (en) | 2021-11-08 | 2021-11-08 | Motor stator and compressor with same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116760209A (en) * | 2023-05-31 | 2023-09-15 | 哈尔滨理工大学 | Submerged low-temperature high-speed motor with low temperature rise |
| WO2024066365A1 (en) * | 2022-09-30 | 2024-04-04 | 青岛海尔空调器有限总公司 | Variable shunt noise reduction control method and system for air conditioner, and air conditioner |
-
2021
- 2021-11-08 CN CN202122718190.9U patent/CN217135235U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024066365A1 (en) * | 2022-09-30 | 2024-04-04 | 青岛海尔空调器有限总公司 | Variable shunt noise reduction control method and system for air conditioner, and air conditioner |
| CN116760209A (en) * | 2023-05-31 | 2023-09-15 | 哈尔滨理工大学 | Submerged low-temperature high-speed motor with low temperature rise |
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