Roots rotor and rotary vane rotor combined fluid machine

Abstract

The utility model belongs to the technical field of vacuum pumps, and particularly relates to a fluid machine combining a roots rotor and a rotary vane rotor. In order to overcome the defects of large size, low integration level, high power consumption, complex assembly and many parts of the conventional Roots rotary vane pump unit, the utility model adopts the following technical scheme: two Roots rotors are arranged, and each of the two Roots rotors comprises a Roots rotor shaft and a Roots rotor body; the rotary vane rotor comprises a rotary vane rotor shaft and a rotary vane rotor body; the power source comprises a motor; and all the roots rotors and the rotary vane rotors are driven by the same power source. The rotor has the advantages that the roots rotor and the rotary vane rotor are combined in the same fluid machine, all the rotors are driven by the same power source, the integration level of the fluid machine is improved, the size of the fluid machine can be reduced, power consumption of the fluid machine can be reduced, and parts of the fluid machine can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum pumps, and specifically relates to a fluid machine with a combined Roots rotor and a sliding vane rotor. Background Art

[0002] With the rapid growth of the demand for vacuum treatment, traditional single-type vacuum pumps cannot meet the increasingly complex vacuum requirements. It is necessary to combine and transform different-function vacuum pumps to form a combined vacuum pump unit. The vacuum pump unit integrates multiple vacuum pumps of different types to meet diverse needs. The Roots sliding vane pump unit is a common vacuum pump unit, which combines a Roots vacuum pump and a sliding vane vacuum pump and has the advantages of low cost and high performance.

[0003] The most basic structure of a Roots vacuum pump is to drive two Roots vanes (the Roots vanes are double or triple vanes) to rotate synchronously and reversely through an electric motor and a gear set. The most basic structure of a sliding vane vacuum pump is to drive one or more sliding vane rotors through an electric motor. Usually, a Roots vacuum pump and a sliding vane vacuum pump produced separately are stacked up and down, and then the two are connected in series with a pipeline to obtain a sliding vane Roots pump. Therefore, the traditional Roots sliding vane pump unit has the disadvantages of large volume, low integration degree, high power consumption, complex assembly, and many components used.

[0004] Therefore, it is of positive significance to provide a Roots and sliding vane combined Roots sliding vane vacuum pump (or compressor) so that the Roots rotor and the sliding vane rotor are driven by the same power source, which can improve the integration degree, reduce the volume, lower the power consumption, and reduce the components. Summary of the Invention

[0005] Aiming at the deficiencies of the existing Roots sliding vane pump unit, such as large volume, low integration degree, high power consumption, complex assembly, and many components, the utility model provides a fluid machine with a combined Roots rotor and a sliding vane rotor, integrates the Roots rotor and the sliding vane rotor, and realizes that the Roots rotor and the sliding vane rotor are driven by the same power source, which can improve the integration degree of the vacuum pump, reduce the volume of the vacuum pump, lower the power consumption of the vacuum pump, and reduce the components of the vacuum pump.

[0006] To achieve the above object, the utility model adopts the following technical scheme: a fluid machine with a combined Roots rotor and a sliding vane rotor, and the fluid machine with a combined Roots rotor and a sliding vane rotor includes:

[0007] Two Roots rotors, and both of the two Roots rotors include a Roots rotor shaft and a Roots rotor body;

[0008] At least one sliding vane rotor, and the sliding vane rotor includes a sliding vane rotor shaft and a sliding vane rotor body;

[0009] A power source, and the power source includes an electric motor;

[0010] Among them, all the Roots rotors and the vane rotors are driven by the same power source.

[0011] The fluid machinery with the composite Roots rotors and vane rotors of the present utility model has all the rotors including the Roots rotors and the vane rotors driven by the same power source, that is, the Roots rotors and the vane rotors are integrated in the same fluid machinery, improving the integration degree of the fluid machinery, reducing the volume of the fluid machinery, lowering the power consumption of the fluid machinery, and reducing the components of the fluid machinery. The vane rotor can be one or more.

[0012] As an improvement, part of the Roots rotors and the vane rotors are coaxially distributed along the axial direction of the fluid machinery.

[0013] As an improvement, the coaxially arranged Roots rotors and vane rotors are integrally formed; or,

[0014] the coaxially arranged Roots rotors and vane rotors share the same rotor shaft, and at least one of the coaxially arranged Roots rotor body and vane rotor body is assembled with the rotor shaft; or,

[0015] the coaxially arranged Roots rotor shaft and vane rotor shaft are assembled together, the Roots rotor is a single piece or an assembled body, and the vane rotor is a single piece or an assembled body.

[0016] As an improvement, the fluid machinery with the composite Roots rotors and vane rotors includes a plurality of coaxially arranged vane rotors, and the plurality of coaxially arranged vane rotors are integrally formed or assembled together.

[0017] As an improvement, the motor is located at the end of the Roots rotor shaft away from the vane rotor, or the motor is located at the end of the vane rotor shaft away from the Roots rotor.

[0018] As an improvement, the Roots rotor shaft and the vane rotor shaft are assembled together, and the motor is located between the Roots rotor shaft and the vane rotor shaft axially.

[0019] As an improvement, the motor is a double-output shaft motor, and both ends of the motor shaft of the motor are respectively assembled with the first part and the second part of the rotor shaft.

[0020] As an improvement, the axis of at least part of the vane rotor shaft is parallel to the axes of the two Roots rotor shafts, and at least one of the Roots rotor shaft and the vane rotor shaft is connected by a transmission mechanism, and the transmission mechanism is a belt drive, a gear drive, a chain drive, a worm drive, a friction wheel, a magnetic drive or a hydraulic drive.

[0021] As an improvement, the motor drives the Roots rotor, and axially, the motor is located between the transmission mechanism and the Roots rotor, or axially, the Roots rotor is located between the motor and the transmission mechanism; or,

[0022] the motor drives the vane rotor, and axially, the vane rotor is located between the transmission mechanism and the motor, or axially, the motor is located between the transmission mechanism and the vane rotor.

[0023] As an improvement, the Roots rotor body or the vane rotor body is assembled to the Roots rotor shaft or the Roots rotor body by one or more of the methods of hot shrinking, keyway, internal expansion, cold shrinking, screw compression, glue pasting, welding, and gear shaping.

[0024] As an improvement, the motor shaft and the coaxial rotor shaft (Roots rotor shaft or vane rotor shaft) are connected by means such as a coupling.

[0025] As an improvement, the fluid machine with a composite Roots rotor and a vane rotor includes a composite rotor, and the composite rotor includes one Roots rotor and at least one vane rotor distributed coaxially, or the axes of all the vane rotors are parallel to the axis of the Roots rotor.

[0026] The beneficial effects of the fluid machine with a composite Roots rotor and a vane rotor of the present utility model are as follows: It has two Roots rotors and at least one vane rotor, and all the Roots rotors and the vane rotors are driven by the same power source, that is, the Roots rotor and the vane rotor are combined in the same fluid machine, improving the integration degree of the fluid machine, reducing the volume of the fluid machine, lowering the power consumption of the fluid machine, and reducing the components of the fluid machine. Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of the fluid machine according to Embodiment 1 of the present utility model.

[0028] Figure 2 is a schematic structural diagram of the fluid machine according to Embodiment 2 of the present utility model.

[0029] Figure 3 is a schematic structural diagram of the fluid machine according to Embodiment 3 of the present utility model.

[0030] Figure 4 is a schematic structural diagram of the fluid machine according to Embodiment 4 of the present utility model.

[0031] Figure 5 is a schematic structural diagram of the fluid machine according to Embodiment 5 of the present utility model.

[0032] Figure 6 is a schematic structural diagram of the fluid machine according to Embodiment 6 of the present utility model.

[0033] Figure 7 It is a schematic structural diagram of the fluid machinery according to the seventh embodiment of the present utility model.

[0034] Figure 8 It is a schematic structural diagram of the fluid machinery according to the eighth embodiment of the present utility model.

[0035] Figure 9 It is a schematic structural diagram of the fluid machinery according to the ninth embodiment of the present utility model.

[0036] Figure 10 It is a schematic structural diagram of the fluid machinery according to the tenth embodiment of the present utility model.

[0037] Figure 11 It is a schematic structural diagram of the fluid machinery according to the eleventh embodiment of the present utility model.

[0038] Figure 12 It is a schematic structural diagram of the fluid machinery according to the twelfth embodiment of the present utility model.

[0039] Figure 13 It is a schematic structural diagram of the fluid machinery according to the thirteenth embodiment of the present utility model.

[0040] Figure 14 It is a schematic structural diagram of the fluid machinery according to the fourteenth embodiment of the present utility model.

[0041] Figure 15 It is a schematic structural diagram of the fluid machinery according to the fifteenth embodiment of the present utility model.

[0042] Figure 16 It is a schematic structural diagram of the fluid machinery according to the sixteenth embodiment of the present utility model.

[0043] Figure 17 It is a schematic structural diagram of the fluid machinery according to the seventeenth embodiment of the present utility model.

[0044] Figure 18 It is a schematic structural diagram of the fluid machinery according to the eighteenth embodiment of the present utility model.

[0045] In the figure, 1 is a Roots rotor; 11 is a Roots rotor shaft; 12 is a Roots rotor body;

[0046] 2 is a motor;

[0047] 3 is a vane rotor; 31 is a vane rotor shaft; 32 is a vane rotor body;

[0048] 4 is a gear set;

[0049] 5 is a pulley assembly. Detailed implementation manners

[0050] The technical solutions of the embodiments of the present invention will be explained and described below. However, the following embodiments are only the preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation manners, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present invention.

[0051] Embodiment 1

[0052] See Figure 1 , the fluid machinery of the composite Roots rotor 1 and the vane rotor 3 in the first embodiment of the present utility model, the fluid machinery of the composite Roots rotor 1 and the vane rotor 3 includes:

[0053] Two Roots rotors 1, both of the two Roots rotors 1 include a Roots rotor shaft 11 and a Roots rotor body 12;

[0054] One vane rotor 3, the vane rotor 3 includes a vane rotor shaft 31 and a vane rotor body 32;

[0055] A power source, the power source includes a motor 2;

[0056] Among them, both of the two Roots rotors 1 and one vane rotor 3 are driven by the same power source.

[0057] In this embodiment, the power source only includes one motor 2. In other embodiments, the power source may include two motors 2, and the two motors 2 respectively drive the two Roots rotor shafts 11 simultaneously.

[0058] In this embodiment, the vane rotor 3 and one of the Roots rotors 1 are coaxially arranged, and the motor 2 is located at the end of the Roots rotor shaft 11 away from the vane rotor 3.

[0059] In this embodiment, the structure connecting the two Roots rotor shafts 11 is not shown, and usually two sets of gear sets 4 are used for connection.

[0060] In this embodiment, the two Roots rotor shafts 11 can be distributed vertically or horizontally.

[0061] In this embodiment, the Roots rotor 1 and the vane rotor 3 are integrally formed (excluding the vanes of the vane rotor body 32). Although the processing difficulty increases, the coaxiality is good, the structure is simple, and the assembly is simplified.

[0062] In other embodiments, the component composed of the Roots rotor and the sliding vane rotor can also be an assembly. When it is an assembly, the Roots rotor shaft and the sliding vane rotor shaft can be assembled together. The Roots rotor is integrally formed, and the sliding vane rotor is integrally formed. It is also possible that the Roots rotor shaft and the sliding vane rotor shaft share the same integral shaft, and at least one of the Roots rotor body and the sliding vane rotor body is assembled with the integral shaft. The Roots rotor body and / or the sliding vane rotor body are assembled to the rotor shaft by one or more of shrink fitting, keyway, internal expansion, cold shrinking, screw compression, glue bonding, welding, and gear shaping methods.

[0063] In this embodiment, the motor shaft and the Roots rotor shaft 11 can be connected by means such as gears, synchronous belts, sprockets, magnetic drives, and hydraulic drives.

[0064] In this embodiment, generally, the sliding vane rotor 3 is used as the front stage, the air inlet is arranged at the sliding vane rotor 3, and the air outlet is arranged at the Roots rotor 1. In other embodiments, the positions of the air inlet and the air outlet can also be adjusted according to needs.

[0065] In this embodiment, the fluid machine is a vacuum pump. In other embodiments, the fluid machine can also be other devices such as a compressor.

[0066] Embodiment 2

[0067] See Figure 2 , the difference between Embodiment 2 and Embodiment 1 is that the fluid machine has two sliding vane rotors 3 and the two sliding vane rotors 3 are coaxially arranged.

[0068] In this embodiment, the two sliding vane rotors 3 and one of the Roots rotors 1 are coaxially arranged, and the Roots rotor 1 is located at the end. Setting two sliding vane rotor bodies 32 can further improve the vacuum degree.

[0069] In other embodiments, the Roots rotor can also be arranged between the two sliding vane rotors.

[0070] The other structures of Embodiment 2 are the same as those of Embodiment 1.

[0071] Embodiment 3

[0072] See Figure 3 , the difference between Embodiment 3 and Embodiment 1 is that the fluid machine has two sliding vane rotors 3 and the two sliding vane rotors 3 are parallel.

[0073] In this embodiment, setting two sliding vane rotor bodies 32 can further improve the vacuum degree or efficiency. Compared with the solution of Embodiment 2, the overall length of the fluid machine in this embodiment can be shorter and the operation can be more stable.

[0074] The other structures of Embodiment 3 are the same as those of Embodiment 1.

[0075] Embodiment 4

[0076] See Figure 4 , the difference between the fourth embodiment and the first embodiment is that the fluid machine has four rotary vane rotors 3, and two of the four rotary vane rotors 3 are coaxially arranged and parallel to the other two.

[0077] In this embodiment, the fluid machine has four rotary vane rotors 3, which can further improve the vacuum degree or efficiency.

[0078] The fifth embodiment

[0079] See Figure 5 , the main difference between the fifth embodiment and the first embodiment lies in the position of the motor 2.

[0080] In this embodiment, the motor 2 is located between the Roots rotor 1 and the rotary vane rotor 3.

[0081] In this embodiment, one of the Roots rotor shafts 11, the rotary vane rotor shafts 31, and the motor shaft share the same shaft, and the Roots rotor body 12 and the rotary vane rotor body 32 are both assembled onto the rotor shaft.

[0082] In other embodiments, the motor is a double-output shaft motor, and both ends of the motor shaft of the motor are respectively assembled with the Roots rotor shaft and the rotary vane rotor shaft, so that the motor can be processed separately, and the Roots rotor and the rotary vane rotor can also be processed independently.

[0083] In this embodiment, the motor 2 is arranged in the middle instead of the end, and the length of the end of the Roots rotor 1 or the rotary vane rotor 3 from the motor 2 is greatly shortened, thereby reducing the wobbling of the end of the rotor shaft and improving the stability.

[0084] The sixth embodiment

[0085] See Figure 6 , the difference between the sixth embodiment and the fifth embodiment is that the fluid machine includes two motors 2 and two rotary vane rotors 3, and both of the two motors 2 are located between the Roots rotor 1 and the rotary vane rotor 3.

[0086] In this embodiment, two motors 2 are provided, and a double-motor 2 is used as the power source for driving, which can improve the power of the fluid machine without substantially increasing the volume.

[0087] The seventh embodiment

[0088] See Figure 7 , the difference between the seventh embodiment and the fifth embodiment is that the fluid machine includes two rotary vane rotors 3, and the two rotary vane rotors 3 are parallel.

[0089] Compared with the fifth embodiment, this embodiment adds a rotary vane rotor 3, which can improve the vacuum degree or efficiency.

[0090] The eighth embodiment

[0091] See Figure 8 , the difference between the eighth embodiment and the fifth embodiment is that the fluid machine includes two vane rotors 3, and the two vane rotors 3 are coaxially distributed.

[0092] Compared with the fifth embodiment, this embodiment adds a vane rotor 3, which can improve the vacuum degree or efficiency.

[0093] The ninth embodiment

[0094] See Figure 9 , the difference between the ninth embodiment and the fifth embodiment is that the fluid machine includes two motors 2 and four vane rotors 3. Among the four vane rotors 3, two are coaxially distributed in pairs and are parallel to the other two, and the two motors 2 are both located between the Roots rotor 1 and the vane rotors 3.

[0095] In this embodiment, the use of dual motors 2 for driving can improve the power. A total of four vane rotors 3 are provided, which can improve the vacuum degree or efficiency.

[0096] The tenth embodiment

[0097] See Figure 10 , the difference between the tenth embodiment and the fifth embodiment is that the fluid machine includes one motor 2 and four vane rotors 3. Among the four vane rotors 3, two are coaxially distributed in pairs and are parallel to the other two, and the motor 2 is located between the Roots rotor body 12 and the vane rotor body 32.

[0098] In this embodiment, a total of four vane rotor bodies 32 are provided, which can improve the vacuum degree or efficiency.

[0099] The eleventh embodiment

[0100] See Figure 11 , the difference between the eleventh embodiment and the first embodiment is that the Roots rotor shaft 11 and the vane rotor shaft 31 are assembled together.

[0101] In this embodiment, an existing shaft-to-shaft connection structure such as a coupling can be used to connect the Roots rotor shaft 11 and the vane rotor shaft 31. The Roots rotor shaft 11 and the vane rotor shaft 31 are assembled rather than integrally formed, and the Roots rotor 1 and the vane rotors 3 can be processed separately, which is easier to process.

[0102] In this embodiment, the motor 2 is located at one end of the Roots rotor 1 away from the vane rotors 3.

[0103] In this embodiment, the motor shaft and the Roots rotor shaft 11 are integrally formed.

[0104] In other embodiments, the motor shaft and the rotor shaft can be connected by means of gears, synchronous belts, sprockets, magnetic drives, hydraulic drives, etc.

[0105] The twelfth embodiment

[0106] See Figure 12 The difference between the twelfth embodiment and the eleventh embodiment is that the rotor shaft includes two vane rotors 3.

[0107] In this embodiment, the two vane rotor bodies 32 are coaxially distributed and the two vane rotor shafts 31 are assembled together.

[0108] In this embodiment, an assembly method is adopted between the Roots rotor shaft 11 and the vane rotor shaft 31. The Roots rotor 1 and the vane rotor 3 can be processed independently. An assembly method is adopted between the two vane rotor shafts 31, and the two vane rotors 3 can be processed independently.

[0109] The thirteenth embodiment

[0110] See Figure 13 The difference between the thirteenth embodiment and the eleventh embodiment is the position of the motor 2.

[0111] In this embodiment, the motor 2 is located between the Roots rotor 1 and the vane rotor 3. Compared with the motor 2 located at the end, the stability of the fluid machine is better. An assembly method is adopted among the motor shaft, the Roots rotor shaft 11 and the vane rotor shaft 31. The motor 2, the Roots rotor 1 and the vane rotor 3 can be processed independently. The motor 2 is a motor 2 with double output shafts.

[0112] The fourteenth embodiment

[0113] See Figure 14 The difference between the fourteenth embodiment and the thirteenth embodiment is that the fluid machine includes two vane rotors 3, and the two vane rotors 3 are coaxially distributed.

[0114] In this embodiment, an assembly method is adopted among the motor shaft, the Roots rotor shaft 11 and the vane rotor shaft 31. The Roots rotor 1 and the vane rotor 3 can be processed independently. An assembly method is also adopted between the two vane rotor shafts 31, and the two vane rotors 3 can be processed independently.

[0115] The fifteenth embodiment

[0116] See Figure 15 The difference between the fifteenth embodiment and the fourteenth embodiment is that the fluid machine includes four vane rotors 3, and among the four vane rotors 3, two are coaxially distributed in pairs and are parallel to the other two.

[0117] In this embodiment, the two vane rotor shafts 31, the motor shaft and the Roots rotor shaft 11 on one axis are all assembled together, and the two vane rotor shafts 31 and the Roots rotor 1 on the other axis are all assembled together.

[0118] The sixteenth embodiment

[0119] See Figure 16, the difference between the sixteenth embodiment and the fifteenth embodiment is that the fluid machine includes two motors 2.

[0120] In this embodiment, the fluid machine includes four vane rotors 3 and two motors 2. Among the four vane rotors 3, two are coaxially distributed in pairs and parallel to the other two. The two motors 2 are respectively located between the Roots rotors 1 and the vane rotors 3.

[0121] Embodiment Seventeen

[0122] See Figure 17 , in this embodiment, the fluid machine of the composite Roots rotor 1 and the vane rotor 3 includes:

[0123] Two Roots rotors 1, and both of the two Roots rotors 1 include a Roots rotor shaft 11 and a Roots rotor body 12;

[0124] One vane rotor 3, and the vane rotor 3 includes a vane rotor shaft 31 and a vane rotor body 32;

[0125] A power source, and the power source includes a motor 2;

[0126] Among them, all the Roots rotors 1 and the vane rotor 3 are driven by the same power source.

[0127] In this embodiment, the axis of the vane rotor 3 is parallel to the axes of the two Roots rotors 1.

[0128] In this embodiment, the two Roots rotor shafts 11 rotate synchronously and in opposite directions through a gear set 4.

[0129] In this embodiment, the Roots rotor shaft 11 and the vane rotor shaft 31 are connected through a transmission mechanism.

[0130] In this embodiment, the motor 2 drives the Roots rotor 1, and axially, the motor 2 is located between the transmission mechanism and the Roots rotor 1. The transmission mechanism includes a pulley set.

[0131] Embodiment Eighteen

[0132] See Figure 18 , the difference between the eighteenth embodiment and the seventeenth embodiment is the position of the motor 2.

[0133] In this embodiment, the motor 2 drives the vane rotor 3, and the vane rotor 3 is located between the transmission mechanism and the motor 2.

[0134] In other embodiments, when the axes of some or all of the vane rotors are parallel to the axes of the two vane rotors, the position, relative position, and quantity, etc. of this part or all of the vane rotors and the motor can be adjusted accordingly as needed.

[0135] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the content described in the above specific implementation manner. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A fluid machine with a compound Roots rotor (1) and a sliding vane rotor (3), characterized in that: The fluid machinery of the composite Roots rotor (1) and the vane rotor (3) includes: Two Roots rotors (1), and both of the two Roots rotors (1) include a Roots rotor shaft (11) and a Roots rotor body (12); At least one vane rotor (3), and the vane rotor (3) includes a vane rotor shaft (31) and a vane rotor body (32); A power source, and the power source includes a motor (2); Wherein, all of the Roots rotors (1) and the vane rotor (3) are driven by the same power source.

2. The fluid machinery of the compound Roots rotor (1) and sliding vane rotor (3) according to claim 1, characterized in that: Some of the Roots rotors (1) and the vane rotor (3) are coaxially distributed along the axial direction of the fluid machinery.

3. The fluid machine of the compound Roots rotor (1) and sliding vane rotor (3) according to claim 2, characterized in that: The coaxially arranged Roots rotor (1) and vane rotor (3) are integrally formed; or, The coaxially arranged Roots rotor (1) and vane rotor (3) share the same rotor shaft, and at least one of the coaxially arranged Roots rotor body (12) and vane rotor body (32) is assembled with the rotor shaft; or, The coaxially arranged Roots rotor shaft (11) and vane rotor shaft (31) are assembled together, the Roots rotor (1) is a single piece or an assembly, and the vane rotor (3) is a single piece or an assembly.

4. The fluid machinery of the compound Roots rotor (1) and sliding vane rotor (3) according to claim 1, characterized in that: The fluid machinery of the composite Roots rotor (1) and vane rotor (3) includes a plurality of coaxially arranged vane rotors (3), and the plurality of coaxially arranged vane rotors (3) are integrally formed or assembled together.

5. The fluid machinery of the combined Roots rotor (1) and sliding vane rotor (3) according to any one of claims 1 to 4, characterized in that: The motor (2) is located at the end of the Roots rotor shaft (11) away from the vane rotor (3), or, the motor (2) is located at the end of the vane rotor shaft (31) away from the Roots rotor (1).

6. The fluid machine of the compound Roots rotor (1) and the sliding vane rotor (3) according to claim 1, 2 or 4, characterized in that: The Roots rotor shaft (11) and the vane rotor shaft (31) are assembled together, and axially the motor (2) is located between the Roots rotor shaft (11) and the vane rotor shaft (31).

7. The fluid machine of the compound Roots rotor (1) and the sliding vane rotor (3) according to claim 6, characterized in that: The motor (2) is a double-output shaft motor (2), and both ends of the motor shaft of the motor (2) are respectively assembled with the Roots rotor shaft (11) and the vane rotor shaft (31).

8. The fluid machine of the compound Roots rotor (1) and sliding vane rotor (3) according to claim 1, characterized in that: The axis of at least part of the vane rotor shaft (31) is parallel to the axes of the two Roots rotor shafts (11), and at least one of the Roots rotor shaft (11) and the vane rotor shaft (31) is connected by a transmission mechanism, and the transmission mechanism is a belt drive, a gear drive, a chain drive, a worm drive, a friction wheel, a magnetic drive or a hydraulic drive.

9. The fluid machine of the compound Roots rotor (1) and sliding vane rotor (3) according to claim 8, characterized in that: The motor (2) drives the Roots rotor (1), and axially the motor (2) is located between the transmission mechanism and the Roots rotor (1), or, axially the Roots rotor (1) is located between the motor (2) and the transmission mechanism; or, The motor (2) drives the vane rotor (3), and axially the vane rotor (3) is located between the transmission mechanism and the motor (2), or, axially the motor (2) is located between the transmission mechanism and the vane rotor (3).

10. The fluid machinery of the composite Roots rotor (1) and vane rotor (3) according to claim 1, wherein: The power source includes one or two of the motors (2); The fluid machine is a vacuum pump or a compressor; The fluid machine with the compound Roots rotor (1) and the sliding vane rotor (3) includes a compound rotor, and the compound rotor includes one of the Roots rotors (1) and at least one of the sliding vane rotors (3) distributed coaxially, or the axes of all the sliding vane rotors (3) are parallel to the axis of the Roots rotor (1).

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