CN202833161U - Twin-screw compressor - Google Patents

Twin-screw compressor Download PDF

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Publication number
CN202833161U
CN202833161U CN 201220245721 CN201220245721U CN202833161U CN 202833161 U CN202833161 U CN 202833161U CN 201220245721 CN201220245721 CN 201220245721 CN 201220245721 U CN201220245721 U CN 201220245721U CN 202833161 U CN202833161 U CN 202833161U
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China
Prior art keywords
curved section
center
rotor
female rotor
circle
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Withdrawn - After Issue
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CN 201220245721
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Chinese (zh)
Inventor
张天翼
文命清
周艳辉
金永飞
蔺维君
毕雨时
李日华
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Abstract

The utility model provides a twin-screw compressor. The twin-screw compressor comprises a casing, a female rotor and a male rotor, wherein the female rotor and the male rotor which are arranged in the casing mesh and oppositely rotate with each other. The tooth profiles of the female rotor and the male rotor are bilateral asymmetric, wherein the tooth curve of the female rotor includes an elliptic curve segment and the tooth curve of the male rotor includes an elliptic envelope curve segment that is generated through the conjugation of the elliptic curve segment on the female rotor. The twin-screw compressor utilizes the elliptic and the relative envelope curve tooth profiles of the female rotor and the male rotor to form bilateral asymmetric tooth profiles, so that the area utilization factor of the twin-screw compressor is increased and the stiffness of the female rotor tooth is enhanced.

Description

Double-screw compressor
Technical field
The utility model relates to the compressed machinery field, more specifically, relates to a kind of double-screw compressor.
Background technique
Double-screw compressor has the rotor of housing and a pair ofly intermeshing of being arranged at enclosure interior, spiral-shaped teeth that rotation direction is opposite, and the rotor of its flank of tooth projection is male rotor, and what the flank of tooth was recessed is female rotor.The housing two ends of compressor are respectively equipped with intakeport and relief opening, along with rotor rotatablely moving in housing, make swept volume by the engagement of tooth or disengagement and constantly change, thereby the volume between every pair of teeth groove of periodic variation rotor reaches the purpose of air-breathing, compression and exhaust.
In the prior art, the molded line of the yin, yang rotor of helical-lobe compressor generally is comprised of quadratic curves such as circular arcs, and there is the problem that mutually restricts between area utilization factor and the rotor rigidity in this molded lines of rotor.
The model utility content
The utility model purpose is to provide a kind of area utilization factor and female rotor rigidity high double-screw compressor.
The utility model provides a kind of double-screw compressor, comprise: housing and be arranged at intermeshing in the described housing, that rotation direction is opposite female rotor and male rotor, the profile of tooth of described female rotor and described male rotor is bilateral asymmetric profile of tooth, wherein, the tooth curve of described female rotor comprises oval curved section; The tooth curve of described male rotor comprises the oval envelope curved section that is generated by the oval curved section conjugation on the described female rotor.
Further, the tooth curve of female rotor is by the curved section A that connects successively 2B 2, curved section B 2C 2, curved section C 2D 2, curved section D 2E 2, curved section E 2F 2, curved section F 2G 2With curved section G 2H 2Form, the tooth curve of male rotor is by the curved section A that connects successively 1B 1, curved section B 1C 1, curved section C 1D 1, curved section D 1E 1, curved section E 1F 1, curved section F 1G 1With curved section G 1H 1Form, wherein, curved section A 2B 2For the center of circle is positioned at the female rotor center O 2With curved section A 2B 2Starting point A 2Between line O 2A 2On circular arc; Curved section B 2C 2Be arc envelope line, by the curved section B on the male rotor 1C 1Conjugation generates, curved section B 1C 1For the center of circle is positioned at line O 1O 2On circular arc; Curved section C 2D 2For the center of circle at line O 1O 2On circular arc; Curved section D 2E 2For the center of circle in the male rotor center O 1With curved section A 1B 1Starting point A 1Line O 1A 1On circular arc; Curved section E 2F 2Be the part of ellipse, oval real axis is in the female rotor center O 2With curved section F 2G 2Terminal point G 2Line O 2G 2On, curved section E 2F 2With curved section D 2E 2Be tangential on an E 2, with curved section F 2G 2Be tangential on a F 2Curved section F 2G 2For the center of circle at line O 2G 2On circular arc; Curved section G 2H 2Be the tooth top circular arc of female rotor, the center of circle is the female rotor center O 2Curved section A 1B 1Be arc envelope line, by the curved section A of female rotor 2B 2Conjugation generates; Curved section C 1D 1Be arc envelope line, by the curved section C of female rotor 2D 2Conjugation generates; Curved section D 1E 1Be arc envelope line, by the curved section D of female rotor 2E 2Conjugation generates; Curved section E 1F 1Be the curved section E by female rotor 2F 2The oval envelope curved section that conjugation generates; Curved section F 1G 1Be arc envelope line, by the curved section F on the female rotor 2G 2Conjugation generates; Curved section G 1H 1Be the tooth root circular arc of male rotor, the center of circle is the male rotor center O 1
Further, curved section A 2B 2Radius be R 1, wherein, R 1=(0.01 ~ 0.025) * A, the center of circle is ((l 1-R 1) * cos ∠ A 2O 2O 1, (l 1-R 1) * sin ∠ A 2O 2O 1), l 1Be the radius of the tooth top circular arc of female rotor, A is the male rotor center O 1With the female rotor center O 2Between line O 1O 2Length, O 1Coordinate be (0, A), O 2Coordinate is (0,0); Curved section B 1C 1Radius be R 2, wherein, R 2=(0.015 ~ 0.045) * A, the center of circle is (A * Z 2/ (Z 1+ Z 2)-R 2, 0), Z 1Be the number of teeth of male rotor, Z 2The number of teeth for female rotor; Curved section C 2D 2Radius be R 3, wherein, R 3=(0.25 ~ 0.4) * A, the center of circle is (A * Z 2/ (Z 1+ Z 2)-R 3, 0); Curved section D 2E 2Radius be R 4, wherein, R 4=(0.25 ~ 0.6) * A, the center of circle is ((l 1+ R 4) * cos ∠ A 2O 2O 1, (l 1+ R 4) * sin ∠ A 2O 2O 1); Curved section F 2G 2Radius be R 5, wherein, R 5=(0.15 ~ 0.5) * A, the center of circle is ((l 1-R 5) * cos ∠ G 2O 2O 1, (l 1-R 5) * sin ∠ G 2O 2O 1); Curved section G 2H 2Be the tooth top circular arc of female rotor, the center of circle is the female rotor center O 2, radius is l 1Curved section G 1H 1Be the tooth root circular arc of male rotor, the center of circle is the male rotor center O 1, radius is L 1, L 1Be the radius of the tooth root circular arc of male rotor, and A=l 1+ L 1
Further, the first derivative of the both sides, points of tangency place of each curved section of the tooth curve separately of described female rotor or described male rotor equates.
Further, the gear ratio of described female rotor and male rotor is 6:4.
According to double-screw compressor of the present utility model, the profile of tooth that comprises female rotor and the male rotor of ellipse and envelope thereof by employing, form bilateral asymmetric profile of tooth, compare with the prior art profile of tooth, male rotor teeth groove area change about 5%, it is about 10% that the female rotor facewidth increases, and increased the area utilization factor of double-screw compressor, can also improve the rigidity of female rotor tooth.
Description of drawings
The accompanying drawing that consists of the application's a part is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is according to the female rotor of an embodiment's of the utility model double-screw compressor and male rotor schematic representation;
Fig. 2 is according to the female rotor of the double-screw compressor of Fig. 1 and male rotor molded line mesh schematic representation.
Embodiment
Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.Need to prove that in the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
The utility model provides a kind of double-screw compressor, comprises housing and is arranged at intermeshing in the housing, that rotation direction is opposite female rotor and male rotor, and the profile of tooth of female rotor and male rotor is bilateral asymmetric profile of tooth.Wherein, the tooth curve of female rotor comprises oval curved section; The tooth curve of male rotor comprises the oval envelope curved section that is generated by the oval curved section conjugation on the female rotor.
Double-screw compressor of the present utility model, the mode by adopting circular arc, ellipse and envelope combination thereof forms bilateral asymmetric profile of tooth to the tooth Shape Design of female rotor and male rotor, and wherein, the tooth curve of female rotor comprises oval curved section; The tooth curve of male rotor comprises the design of the oval envelope curved section that is generated by the oval curved section conjugation on the female rotor, has increased the area utilization factor of double-screw compressor, can also improve the rigidity of female rotor tooth.And female rotor tooth root position curved section normal angle increases, and is beneficial to the rotor profile grinding.
The female rotor 2 of present embodiment and the tooth curve of male rotor 1 as shown in Figure 2, the tooth curve of female rotor 2 is by the curved section A that connects successively 2B 2, curved section B 2C 2, curved section C 2D 2, curved section D 2E 2, curved section E 2F 2, curved section F 2G 2With curved section G 2H 2Form, the tooth curve of male rotor 1 is by the curved section A that connects successively 1B 1, curved section B 1C 1, curved section C 1D 1, curved section D 1E 1, curved section E 1F 1, curved section F 1G 1With curved section G 1H 1Form.Below the shape of each curved section is specifically described.
In the following description, for each data is described, the number of teeth of establishing male rotor is Z 1, the number of teeth of female rotor is Z 2, negative and positive rotor centre distance O 1O 2Length be A, O 1Coordinate be (0, A), O 2Coordinate is (0,0).The fillet radius of male rotor is L 1The radius of the tooth top circular arc of female rotor is l 1, and A=L 1+ l 1
Curved section A 2B 2Be circular arc, curved section A 2B 2Center of circle O 5Be positioned at the female rotor center O 2With curved section A 2B 2Starting point A 2Between line O 2A 2On, radius is R 1Wherein preferably, R 1=(0.01 ~ 0.025) * A, the center of circle is ((l 1-R 1) * cos ∠ A 2O 2O 1, (l 1-R 1) * sin ∠ A 2O 2O 1).This section designed arc-shaped appearance has reduced the leakage triangle area.
Curved section B 2C 2Be arc envelope line, by the curved section B on the male rotor 1 1C 1Conjugation generates, curved section B 1C 1For the center of circle is positioned at the male rotor center O 1With the female rotor center O 2Between line O 1O 2On, radius is R 2Circular arc.Wherein preferably, R 2=(0.015 ~ 0.045) * A, the center of circle is (A * Z 2/ (Z 1+ Z 2)-R 2, 0).
Curved section C 2D 2For the center of circle at line O 1O 2On, radius is R 3Circular arc.Wherein preferably, R 3=(0.25 ~ 0.4) * A, the center of circle is (A * Z 2/ (Z 1+ Z 2)-R 3, 0).
Curved section D 2E 2For the center of circle in the male rotor center O 1With curved section A 1B 1Starting point A 1Line O 1A 1On, radius is R 4Circular arc.Wherein preferably, R 4=(0.25 ~ 0.6) * A, the center of circle is ((l 1+ R 4) * cos ∠ A 2O 2O 1, (l 1+ R 4) * sin ∠ A 2O 2O 1).
Curved section E 2F 2Be the part of ellipse, oval real axis is in the female rotor center O 2With curved section F 2G 2Terminal point G 2Line O 2G 2On, curved section E 2F 2With curved section D 2E 2Be tangential on an E 2, with curved section F 2G 2Be tangential on a F 2The design of elliptic curve has increased area utilization factor herein; Improved the rigidity of female rotor tooth; Be beneficial to the rotor profile grinding.
Curved section F 2G 2For the center of circle at line O 2G 2On, radius is R 5Circular arc.Wherein preferably, R 5=(0.15 ~ 0.5) * A, the center of circle is ((l 1-R 5) * cos ∠ G 2O 2O 1, (l 1-R 5) * sin ∠ G 2O 2O 1).
Curved section G 2H 2Be the tooth top circular arc of female rotor 2, the center of circle is the female rotor center O 2, radius is l 1
Curved section A 1B 1Be arc envelope line, by the curved section A of female rotor 2 2B 2Conjugation generates.
Curved section C 1D 1Be arc envelope line, by the curved section C of female rotor 2 2D 2Conjugation generates.
Curved section D 1E 1Be arc envelope line, by the curved section D of female rotor 2 2E 2Conjugation generates.
Curved section E 1F 1Be the curved section E by female rotor 2 2F 2The oval envelope curved section that conjugation generates.
Curved section F 1G 1Be arc envelope line, by the curved section F of female rotor 2 2G 2Conjugation generates.
Curved section G 1H 1Be the tooth root circular arc of male rotor 1, the center of circle is the male rotor center O 1, radius is L 1
Preferably, the first derivative of the both sides, points of tangency place of each curved section of the tooth curve separately of female rotor 2 or male rotor 1 equates.The curved section first derivative equates that curved section curvature changes steadily, and data point is without breakpoint, jumping phenomenon, such setting be beneficial to yin, yang turn between steadily engagement, thereby vibration is less.
As shown in Figure 1, the female rotor 2 of the double-screw compressor of present embodiment is 6:4 with the gear ratio of male rotor 1.
The parameters scope that now proposes by the utility model provides the concrete example of a compressor.Each parameter of this concrete example is as shown in the table:
Parameter Z 2：Z 1 L 1 l 1 A R 1 R 2 R 3 R 4 R 5
Numerical value 6：4 58 102 160 0.018A 0.02A 0.3A 0.4A 0.2A
With above concrete example and tooth number Z 1, Z 2The existing compressor identical with the A value compares test, and the result is as shown in the table:
Figure DEST_PATH_GDA00002566902500041
By contrast as can be known, molded line shown in the utility model all has preferably effect on area utilization factor, utilization efficiency.
As can be seen from the above description, the utility model the above embodiments have realized following technique effect: the yin, yang rotor tooth curve of double-screw compressor mainly is comprised of circular arc, ellipse and conjugation envelope thereof, the tooth curve of above yin, yang rotor has increased the area utilization factor of profile of tooth, has strengthened the rigidity of female rotor.Further, this double-screw compressor also has the characteristics that engagement is steady, vibration is little, efficient is high.Be applicable to the occasions such as low temperature, air-conditioning and empty power.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims (5)

1. double-screw compressor comprises: housing and be arranged at intermeshing in the described housing, that rotation direction is opposite female rotor and male rotor, and the profile of tooth of described female rotor and described male rotor is bilateral asymmetric profile of tooth, it is characterized in that,
The tooth curve of described female rotor comprises oval curved section;
The tooth curve of described male rotor comprises the oval envelope curved section that is generated by the oval curved section conjugation on the described female rotor.
2. double-screw compressor according to claim 1 is characterized in that, the tooth curve of described female rotor is by the curved section A that connects successively 2B 2, curved section B 2C 2, curved section C 2D 2, curved section D 2E 2, curved section E 2F 2, curved section F 2G 2With curved section G 2H 2Form, the tooth curve of described male rotor is by the curved section A that connects successively 1B 1, curved section B 1C 1, curved section C 1D 1, curved section D 1E 1, curved section E 1F 1, curved section F 1G 1With curved section G 1H 1Form, wherein,
Described curved section A 2B 2For the center of circle is positioned at the female rotor center O 2With curved section A 2B 2Starting point A 2Between line O 2A 2On circular arc;
Described curved section B 2C 2Be arc envelope line, by the described curved section B on the described male rotor 1C 1Conjugation generates, described curved section B 1C 1For the center of circle is positioned at the female rotor center O 2With the male rotor center O 1Line O 1O 2On circular arc;
Described curved section C 2D 2For the center of circle at described line O 1O 2On circular arc;
Described curved section D 2E 2For the center of circle in the male rotor center O 1With described curved section A 1B 1Starting point A 1Line O 1A 1On circular arc;
Described curved section E 2F 2Be the part of ellipse, the real axis of described ellipse is in described female rotor center O 2With described curved section F 2G 2Terminal point G 2Line O 2G 2On, described curved section E 2F 2With described curved section D 2E 2Be tangential on an E 2, with described curved section F 2G 2Be tangential on a F 2
Described curved section F 2G 2For the center of circle at described line O 2G 2On circular arc;
Described curved section G 2H 2Be the tooth top circular arc of described female rotor, the center of circle is the female rotor center O 2
Described curved section A 1B 1Be arc envelope line, by the curved section A of described female rotor 2B 2Conjugation generates;
Described curved section C 1D 1Be arc envelope line, by the curved section C of described female rotor 2D 2Conjugation generates;
Described curved section D 1E 1Be arc envelope line, by the curved section D of described female rotor 2E 2Conjugation generates;
Described curved section E 1F 1Be the described curved section E by described female rotor 2F 2The oval envelope curved section that conjugation generates;
Described curved section F 1G 1Be arc envelope line, by the curved section F on the described female rotor 2G 2Conjugation generates;
Described curved section G 1H 1Be the tooth root circular arc of male rotor, the center of circle is the male rotor center O 1
3. double-screw compressor according to claim 2 is characterized in that,
Described curved section A 2B 2Radius be R 1, wherein, R 1=(0.01 ~ 0.025) * A, the center of circle is ((l 1-R 1) * cos ∠ A 2O 2O 1, (l 1-R 1) * sin ∠ A 2O 2O 1), l 1Be the radius of the tooth top circular arc of described female rotor, A is the male rotor center O 1With the female rotor center O 2Between line O 1O 2Length, O 1Coordinate be (0, A), O 2Coordinate is (0,0);
Described curved section B 1C 1Radius be R 2, wherein, R 2=(0.015 ~ 0.045) * A, the center of circle is (A * Z 2/ (Z 1+ Z 2)-R 2, 0), Z 1Be the number of teeth of male rotor, Z 2The number of teeth for female rotor;
Described curved section C 2D 2Radius be R 3, wherein, R 3=(0.25 ~ 0.4) * A, the center of circle is (A * Z 2/ (Z 1+ Z 2)-R 3, 0);
Described curved section D 2E 2Radius be R 4, wherein, R 4=(0.25 ~ 0.6) * A, the center of circle is ((l 1+ R 4) * cos ∠ A 2O 2O 1, (l 1+ R 4) * sin ∠ A 2O 2O 1);
Described curved section F 2G 2Radius be R 5, wherein, R 5=(0.15 ~ 0.5) * A, the center of circle is ((l 1-R 5) * cos ∠ G 2O 2O 1, (l 1-R 5) * sin ∠ G 2O 2O 1);
Described curved section G 2H 2Be the tooth top circular arc of described female rotor, the center of circle is the female rotor center O 2, radius is l 1
Described curved section G 1H 1Be the tooth root circular arc of male rotor, the center of circle is the male rotor center O 1, radius is L 1, L 1Be the radius of the tooth root circular arc of male rotor, and A=l 1+ L 1
4. according to claim 1 and 2 or 3 described double-screw compressors, it is characterized in that the first derivative of the both sides, points of tangency place of each curved section of the tooth curve separately of described female rotor or described male rotor equates.
5. according to claim 1 and 2 or 3 described double-screw compressors, it is characterized in that the gear ratio of described female rotor and male rotor is 6:4.
CN 201220245721 2012-05-28 2012-05-28 Twin-screw compressor Withdrawn - After Issue CN202833161U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103452841A (en) * 2012-05-28 2013-12-18 珠海格力电器股份有限公司 Double-screw compressor
CN112377407A (en) * 2020-10-09 2021-02-19 合肥通用机械研究院有限公司 Three-section type double-screw compressor rotor and design method of molded line thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103452841A (en) * 2012-05-28 2013-12-18 珠海格力电器股份有限公司 Double-screw compressor
CN112377407A (en) * 2020-10-09 2021-02-19 合肥通用机械研究院有限公司 Three-section type double-screw compressor rotor and design method of molded line thereof
CN112377407B (en) * 2020-10-09 2022-08-02 合肥通用机械研究院有限公司 Three-section type double-screw compressor rotor and design method of molded line thereof

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Granted publication date: 20130327

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