EP3722609B1 - Spiralverdichter und klimatisierungseinheit - Google Patents

Spiralverdichter und klimatisierungseinheit Download PDF

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Publication number
EP3722609B1
EP3722609B1 EP18909109.3A EP18909109A EP3722609B1 EP 3722609 B1 EP3722609 B1 EP 3722609B1 EP 18909109 A EP18909109 A EP 18909109A EP 3722609 B1 EP3722609 B1 EP 3722609B1
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EP
European Patent Office
Prior art keywords
pressure level
rotor
rotor assembly
screw compressor
male
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18909109.3A
Other languages
English (en)
French (fr)
Other versions
EP3722609A1 (de
EP3722609A4 (de
Inventor
Hua Liu
Zhiping Zhang
Tianyi Zhang
Yushi BI
Cong Cao
Rihua LI
Qiangjun MENG
Ziyuan HUANG
Helong ZHANG
Yungong XU
Baoge ZHANG
Zhihua Liu
Furong HOU
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
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Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Publication of EP3722609A1 publication Critical patent/EP3722609A1/de
Publication of EP3722609A4 publication Critical patent/EP3722609A4/de
Application granted granted Critical
Publication of EP3722609B1 publication Critical patent/EP3722609B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/02—Arrangements of bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0021—Systems for the equilibration of forces acting on the pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/0085—Prime movers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/40—Electric motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/50—Bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2250/00—Geometry
    • F04C2250/20—Geometry of the rotor

Definitions

  • the present disclosure relates to the field of compressors, and specifically relates to a screw compressor and an air-conditioning unit.
  • the single-motor double-level screw compressor comprises a motor and two pairs of rotors.
  • the two pairs of rotors are low-level rotors and high-level rotors.
  • Each level of rotors comprises a female rotor and a male rotor that mesh with each other.
  • the motor is located between two pairs of rotors.
  • the motor comprises a rotary shaft with one end connected with a high-level male rotor by key joint to realize transmission, and the other end connected with a low-level male rotor by key joint to realize transmission.
  • a screw compressor comprises first and second male rotors which have convex-helical teeth, first and second female rotors which have concave-helical teeth, each of the first and second male rotors being rigidly connected together, each of the first and second female rotors being arranged separately from and opposite to each other; wherein the convex-helical teeth are engaged with the corresponding concave-helical teeth.
  • the first and second male rotors are symmetrically so that the axial force exerted on the first male rotor counteracts with the axial force exerted on the second male rotor.
  • JPS61294184A to decrease the total thrust load by installing a hermetic double-shaft motor between a plurality of screw compressors to drive them so as to arrange the inlet side and discharge side of each screw compressor oppositely to each other.
  • a hermetic double-shaft motor When a hermetic double-shaft motor is driven, the gas sucked through an inlet opening undergoes the first stage compression in a first-stage screw compressor, and goes into an air passage in a second-stage screw compressor. Then the gas is sucked through an inlet opening to undergo the second-stage compression, and is discharged through a discharge opening.
  • thrust loads T1, T2 act on rotors of compressor respectively, according to each differential pressure between its discharge and inlet pressure.
  • thrust loads T1, T2 work face to face, offsetting each other.
  • the total thrust load can be decreased.
  • CN1793654A discloses a double screw rod compressor for a high pressure system, comprising a working cavity composed of positive rotor and negative rotor, mutually engaging, and casing; the casing is provided with air intake and air outlet, the extension shaft of the positive rotor is provided with shaft seal, and air inlet and outlet channels are arranged in the casing; each of the negative and positive rotors has bearings which bear axial and radial forces and are distributed on two ends and in the middle; each of the negative and positive rotors are provided with two spiral sections whose tooth shape and size are the same as those of two spiral sections of a rotor, where the teeth correspond one to one and their spiral directions are opposite; the ratio of length to diameter of the spiral section is 1: 1 ⁇ 1:1.2, the positive rotor has five or six teeth and the negative has seven or eight teeth, and the diameter of root circle of the negative rotor is not less than that of the positive rotor. Its exhaust pressure can be up to 15MPa, able to
  • the suction and displacement directions of the screw compressor are related to the arrangement manner of the rotor and the rotation direction of the rotor helix (simply referred to as the rotation direction).
  • the lower-level rotor of the single-level double-level screw compressor is provided with an underslung slide valve.
  • the arrangement manner of the lower-level rotor is as follows: viewed from the suction side to the displacement side, the female rotor is on the left side of the male rotor, and the refrigerant enters from above and exits from below.
  • the high-level rotor uses the same arrangement manner, and the refrigerant also enters from above and exits from below, so that the fluid outlet of the screw compressor is arranged below, which is inconvenient to the installation of the stop valve and the check valve.
  • the arrangement manner of the motor between the two pairs of rotors when the rotor rotation direction is the same, the axial force direction is the same, and there is an excessive force received on the displacement side, which affects the operation stability of the compressor.
  • the present disclosure proposes a screw compressor and an air conditioning unit to improve the performance of the screw compressor.
  • the screw compressor comprises:
  • the screw compressor further comprises: a motor disposed between the first pressure level rotor assembly and the second pressure level rotor assembly, wherein the motor comprises a motor shaft with a first end of in driving connection with the first pressure level male rotor, and a second end of the motor shaft in driving connection with the second pressure level male rotor.
  • a helix of the first pressure level male rotor has the same helical direction as a helix of the second pressure level male rotor, and the first pressure level female rotor and the second pressure level female rotor are respectively located on both sides of a shaft center line of the motor shaft.
  • the first pressure level male rotor and the second pressure level male rotor are coaxially arranged.
  • the body comprises:
  • the body is provided with a fluid inlet, which is located at the top of the body.
  • the body is provided with a fluid outlet, which is located at the top of the body.
  • the screw compressor comprises a plurality of groups of the first pressure level rotor assembly and the second pressure level rotor assembly.
  • the screw compressor is a single-motor double-level screw compressor.
  • a first end of the motor shaft is key-connected to the second pressure level male rotor, and a second end of the motor shaft is connected to the first pressure level male rotor through a coupling.
  • an air-conditioning unit comprises the screw compressor provided by any technical solution of the present disclosure.
  • the arrangement manners of the respective rotors of the first pressure level rotor assembly and the second pressure level rotor assembly are reasonably provided, so that the axial force received by the first pressure level rotor assembly and exerted by the compressed gas therein is opposite to the axial force received by the second pressure level rotor assembly and exerted by the compressed gas therein, which balances the axial force received by the rotor assembly of the screw compressor as a whole, so that there is a more balanced force received during the operational process of the screw compressor, and the screw compressor works more reliably.
  • the present disclosure provides a screw compressor comprising a first pressure level rotor assembly 1, a second pressure level rotor assembly 2 and a body 3.
  • the first pressure level rotor assembly 1 comprises a first pressure level male rotor 11 and a first pressure level female rotor 12 meshed with each other
  • the second pressure level rotor assembly 2 comprises a second pressure level male rotor 21 and a second pressure level female rotor 22 mated with each other
  • the body 3 is internally provided with a first pressure level rotor assembly 1 and a second pressure level rotor assembly 2.
  • the first pressure level rotor assembly 1 and the second pressure level rotor assembly 2 are provided to satisfy the following conditions: the axial force received by the first pressure level rotor assembly 1 and exerted by the compressed gas therein is opposite to the axial force received by the second pressure level rotor assembly 2 and exerted by the compressed gas therein.
  • the first pressure level male rotor 11 is supported by a bearing 51
  • the first pressure level female rotor 12 is supported by a bearing 52
  • the second pressure level male rotor 21 is supported by a bearing 53
  • the second pressure level female rotor 22 is supported by a bearing 54.
  • the action force exerted by the displacement side on the inner wall of the engagement cavity of the female and male rotors is greater than the action force exerted by the suction side on the inner wall of the engagement cavity of the female and male rotors.
  • the action force exerted by the gas on the inner wall of the engagement cavity has a component along the shaft center line of the male and female rotors.
  • the force of the component refers to an axial force exerted by the gas to the rotor, and an opposite axial force refers to an opposite direction of an axial force.
  • the alternative arrangement manner of the first level rotor assembly 1 and the second pressure level rotor assembly 2 comprises the following: one manner shown in Fig. 1 is such that the arrow-like shapes formed by approximately intersecting the helixes of the first level rotor assembly 1 and the second pressure level rotor assembly 2 are opposite to each other; another alternative manner is such that the arrow-like shapes formed by approximately intersecting the helixes of the first level rotor assembly 1 and the second pressure level rotor assembly 2 face away from each other.
  • the screw compressor comprises, for example, one or more groups of rotor assemblies.
  • Each group of rotor assemblies comprises a first pressure level rotor assembly 1 and a second pressure level rotor assembly 2.
  • the first pressure level rotor assembly 1 and the second pressure level rotor assembly 2 in each group of rotor assemblies receive the compressed gas in opposite axial directions so as to cancel out with each other.
  • the same stream of gas sequentially passes through respective rotor assemblies to realize compression.
  • the low pressure level rotor assembly serves as the first pressure level rotor assembly 1
  • the high pressure level rotor assembly serves as the second pressure level rotor assembly 2
  • the gas is sequentially compressed by the first pressure level rotor assembly 1 and the second pressure level rotor assembly 2.
  • a three-level screw compressor as an example (e.g., comprising three rotor assemblies A, B, and C), the gas first enters A for compression, the gas displaced by A is then compressed by B, and the gas displaced by B is then compressed by C.
  • Alternative forms comprise: for example, A serves as first pressure level rotor assembly 1 and B serves as a second pressure level assembly.
  • B serves as a first pressure level rotor assembly 1
  • C serves as a second pressure level assembly
  • A serves as a first pressure level rotor assembly 1
  • C serves as a second pressure level assembly.
  • a four-level screw compressor as an example (e.g., comprising four rotor assemblies D, E, F, and G), the gas enters D for compression, the gas displaced by D is compressed by E, and the gas displaced by E is compressed by F, and the gas displaced by F is compressed by G again.
  • the four rotor assemblies are divided into two groups, where D and E are in the first group, and F and G are in the second group.
  • D is the first pressure level rotor assembly 1 in the first group
  • E is the second pressure level rotor assembly 2 in the first group.
  • F is the first pressure level rotor assembly 1 in the second group
  • G is the second pressure level rotor assembly 2 in the second group.
  • the respective axial forces of D and E are opposite to each other, and the respective axial forces of F and G are opposite to each other.
  • the first pressure level male rotor 11 and the second pressure level male rotor 21 are coaxially arranged to better balance a force received by the screw compressor rotor assembly.
  • the coaxial arrangement allows that the axial force received by the first pressure level rotor assembly 1 and the axial force received by the second pressure level rotor assembly 2 are balanced on the concentric shaft.
  • the screw compressor further comprises a motor 4 disposed between the first pressure level rotor assembly 1 and the second pressure level rotor assembly 2.
  • the motor 4 comprises a motor shaft 41, with a first end in driving connection with the first pressure level male rotor 11, and a second end of the motor shaft 41 in driving connection with the second pressure level male rotor 21.
  • the rotation direction of the motor shaft 41, the helical direction of the male and female rotors, and the position of the female rotor relative to the male rotor all affect the gas flow direction.
  • the above-described various factors are selected according to the gas flow direction that is actually required.
  • the first end of the motor shaft 41 is directly key-connected with the second pressure level male rotor 21, and the second end of the motor shaft 41 is connected with the first pressure level male rotor 11 through a coupling 6.
  • the coupling 6 is configured to balance a torque generated by the rotor assemblies at both ends of the motor shaft 41 due to the axial force directions that do not overlap.
  • the first arrangement manner of the first pressure level rotor assembly 1 and the second pressure level rotor assembly 2 will be described below: referring to Fig. 1 , in some embodiments, the helixes of the first pressure level male rotor 11 and the second pressure level male rotor 21 have the same helical direction, and the first pressure level female rotor 12 and the second pressure level female rotor 22 are located on both sides of the shaft center line of the motor shaft 41, respectively.
  • first pressure level rotor assembly 1 and the second pressure level rotor assembly 2 use the first arrangement manner described above or the second arrangement manner described later, alternatively, the entire screw compressor is provided: the fluid inlet 33 of the refrigerant is located at the top of the screw compressor, and the fluid outlet 34 of the refrigerant is located at the bottom of the screw compressor. This arrangement manner facilitates the installation of other related components.
  • the body 3 comprises a first pressure level body 31 and a second pressure level body 32.
  • the first pressure level body 31 and the second pressure level body 32 are fixed together.
  • the first pressure level body 31 is internally provided with a first pressure level rotor assembly 1;
  • the second pressure level body 32 is internally provided with a second pressure level bearing seat 7, and the second pressure level bearing seat 7 supports the second pressure level rotor assembly 2, and
  • the second pressure level bearing seat 7 is integrally formed with the second pressure level body 32.
  • a bearing 53 and a bearing 54 are installed inside the second pressure level bearing seat 7.
  • a bearing 51 and a bearing 52 are installed within the first pressure level bearing seat 8.
  • the bearing 51 supports the first pressure level male rotor 11 and the bearing 52 supports the first pressure level female rotor 12.
  • the body 3 further comprises, for example, an intermediate body 35, and only a part or an entirety of the housing of the motor 4 is located within the intermediate body 35, if the part comprised in the housing of the motor 4 is located in the intermediate body 35, the motor shaft 41 projects out of the intermediate body 35 for driving connection to each rotor assembly on both sides of the motor 4. If the motor 4 is entirely located within the intermediate body 35, the driving connection between the motor shaft 41 and each rotor assembly on both sides of the motor 4 may be realized by using members such as a coupling.
  • the body 3 is provided with a fluid inlet 33 which is located on the top of the body 3.
  • the fluid inlet 33 is specifically disposed in the first pressure level body 31 for example, and located on the top of the first pressure level body 31.
  • the first pressure level is a low pressure level
  • the second pressure level is a high pressure level.
  • the low pressure level is generally provided with a slide valve structure which is located below the first pressure level rotor assembly 1.
  • the fluid inlet 33 is disposed at the top to facilitate providing other related structures.
  • the body 3 is provided with a fluid outlet 34, which is located at the top of the body 3.
  • the thick arrow in Fig. 2 indicates the flow of compressed gas, and the thin arrow indicates the flow of supplementary liquid.
  • the fluid inlet 33 and the fluid outlet 34 of the screw compressor are both arranged above as shown in Fig. 2 , so that the overall width dimension of the compressor is greatly reduced, and the size of the unit shell is correspondingly reduced, thereby effectively reducing the cost.
  • the screw compressor is a single-motor double-level screw compressor. That is, a motor 4 is used to simultaneously drive the male rotors of the low pressure level and high pressure level rotor assemblies.
  • the symmetrical arrangement structure of the single-motor double-level rotor assembly in the some embodiments is shown in Fig. 1 .
  • the first pressure level rotor assembly 1 is a low pressure level
  • the second pressure level rotor assembly 2 is a high pressure level.
  • the low pressure level male rotor and the low pressure level female rotor are installed inside the low pressure level body 3.
  • the screw compressor uses a structure of an underslung slide valve, and the female rotor is on the left side of the male rotor.
  • the high pressure level male rotor and the high pressure level female rotor are installed within the high pressure level body 3.
  • the rotor With reference to the center line of the motor shaft 41, the rotor is arranged in a reversed manner, and the high pressure level and low pressure level female rotors are in different positions with respect to their own male rotors.
  • the high pressure level male rotor is driven by the motor 4 installed within the motor body 3, and the motor shaft 41 drives the low pressure level male rotor through the coupling.
  • the coupling 6 is inside the intermediate body 35, and is finally assembled.
  • the flow direction of the entire screw compressor enters from above and exits from above. Specifically, the fluid direction of the first pressure level rotor assembly 1 enters from above and exits from below, and the fluid direction of the second pressure level rotor assembly 2 enters from below and exits from above.
  • a fluid supplementing port 36 is provided on the top of the intermediate body 35 to supplement a low temperature liquid refrigerant. The sprayed liquid is settled to mix with the displacement of the first pressure level, and cools the motor 4 when passing through the cavity of the motor 4.
  • the high pressure level suction port is arranged below, the refrigerant passing through the cavity of the motor 4 flows to the bottom, and the flow distance of the refrigerant increases, which effectively cool the stator coil of the motor 4, so that it is possible to effectively reduce the displacement temperature and improve the energy efficiency.
  • the fluid outlets 34 are all arranged below, and the displacement pressure is greater than the suction pressure.
  • the directions of the forces received by the rotors are all from down to up, such that the upper side of the rotor subjected to an excessive force is likely to be scratched with the rotor cavity, and the coupling when having an excessive offset is likely to cause too much noise. Therefore, the rotation direction of the second pressure level rotor assembly 2 is reversed as shown in Fig. 1 .
  • the low pressure level rotor inwards with respect to the two rotors, with a downward displacement and an upward force received by the rotor.
  • the second pressure level rotor assembly 2 rotates outwards with respect to the rotors.
  • the two levels of rotors receive forced in opposite directions and receive balanced forces.
  • the rotation torque is balanced by the coupling.
  • the oil path is provided such that the low pressure level enters from the first pressure level female rotor 12 side, and the first pressure level male rotor 11 returns oil at the bottom; the high pressure level enters from the second pressure level female rotor 22 side, and the second pressure level male rotor 21 returns oil at the bottom, such that the oil return may be ensured by supplying oil by a pressure difference.
  • the above-described technical solution implements balancing the force received by two levels of rotors and improving the operation stability of the compressor by symmetrically arranging the rotors.
  • the fluid inlet 33 and the fluid outlet 34 of the compressor are both arranged above, which facilitate the maintenance and reduction of the cost.
  • the entire screw compressor is provided such that the fluid inlet 33 of the refrigerant is located at the top of the screw compressor, and the refrigerant fluid outlet 34 is located at the bottom of the screw compressor.
  • an air-conditioning unit comprises the screw compressor provided by any technical solution of the present disclosure.

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

Claims (9)

  1. Schraubenkompressor, der Folgendes umfasst:
    eine Rotoranordnung (1) mit einem ersten Druckpegel, die einen männlichen Rotor (11) mit dem ersten Druckpegel und einen weiblichen Rotor (12) mit dem ersten Druckpegel umfasst, die miteinander kämmen;
    eine Rotoranordnung (2) mit einem zweiten Druckpegel, die einen männlichen Rotor (21) mit dem zweiten Druckpegel und einen weiblichen Rotor (22) mit dem zweiten Druckpegel umfasst, die miteinander kämmen; und
    einen Körper (3), in dem die Rotoranordnung (1) mit dem ersten Druckpegel und die Rotoranordnung (2) mit dem zweiten Druckpegel angeordnet sind;
    wobei die Rotoranordnung (1) mit dem ersten Druckpegel und die Rotoranordnung (2) mit dem zweiten Druckpegel so konfiguriert sind, dass sie eine von der Rotoranordnung (1) mit dem ersten Druckpegel aufgenommene und von einem Druckgas in der Rotoranordnung (1) mit dem ersten Druckpegel ausgeübte Axialkraft ermöglichen, die einer von der Rotoranordnung (2) mit dem zweiten Druckpegel aufgenommenen und von einem Druckgas darin ausgeübten Axialkraft entgegengesetzt ist;
    der ferner Folgendes umfasst:
    einen Motor (4), der zwischen der Rotoranordnung (1) mit dem ersten Druckpegel und der Rotoranordnung (2) mit dem zweiten Druckpegel angeordnet ist, wobei der Motor (4) eine Motorwelle (41) umfasst, wobei ein erstes Ende der Motorwelle (41) in Antriebsverbindung mit dem männlichen Rotor (11) mit dem ersten Druckpegel steht und ein zweites Ende der Motorwelle (41) in Antriebsverbindung mit dem männlichen Rotor (21) mit dem zweiten Druckpegel steht,
    und dadurch gekennzeichnet, dass
    eine Helix des männlichen Rotors (11) mit dem ersten Druckpegel die gleiche Helixrichtung wie eine Helix des männlichen Rotors (21) mit dem zweiten Druckpegel hat, und der weibliche Rotor (12) mit dem ersten Druckpegel und der weibliche Rotor (22) mit dem zweiten Druckpegel jeweils auf beiden Seiten einer Wellenmittellinie der Motorwelle (41) angeordnet sind.
  2. Schraubenkompressor nach Anspruch 1, wobei der männliche Rotor (11) mit dem ersten Druckpegel und der männliche Rotor (21) mit dem zweiten Druckpegel koaxial angeordnet sind.
  3. Schraubenkompressor nach Anspruch 1, wobei der Körper (3) Folgendes umfasst:
    einen Körper (31) mit dem ersten Druckpegel, in dem die Rotoranordnung (1) mit dem ersten Druckpegel vorgesehen ist; und
    einen Körper (32) mit dem zweiten Druckpegel, in dem die Rotoranordnung (2) mit dem zweiten Druckpegel vorgesehen ist, wobei ein Lagersitz (7) mit dem zweiten Druckpegel die Rotoranordnung (2) mit dem zweiten Druckpegel lagert und der Lagersitz (7) mit dem zweiten Druckpegel einstückig mit dem Körper (32) mit dem zweiten Druckpegel ausgebildet ist.
  4. Schraubenkompressor nach Anspruch 1, wobei der Körper (3) mit einem Fluideinlass (33) versehen ist, der sich an der Oberseite des Körpers (3) befindet.
  5. Schraubenkompressor nach Anspruch 1, wobei der Körper (3) mit einem Fluidauslass (34) versehen ist, der sich an der Oberseite des Körpers (3) befindet.
  6. Schraubenkompressor nach Anspruch 1, wobei der Schraubenkompressor mehrere Gruppen der Rotoranordnung (1) mit dem ersten Druckpegel und der Rotoranordnung (2) mit dem zweiten Druckpegel umfasst.
  7. Schraubenkompressor nach Anspruch 1, wobei der Schraubenkompressor ein einmotoriger Zweipegel-Schraubenkompressor ist.
  8. Schraubenkompressor nach Anspruch 1, wobei ein erstes Ende der Motorwelle (41) mit dem männlichen Rotor (21) des zweiten Druckpegels formschlüssig verbunden ist und ein zweites Ende der Motorwelle (41) mit dem männlichen Rotor (11) des ersten Druckpegels über eine Kupplung (6) verbunden ist.
  9. Klimaanlage, die den Schraubenkompressor nach einem der Ansprüche 1-8 umfasst.
EP18909109.3A 2018-03-05 2018-12-12 Spiralverdichter und klimatisierungseinheit Active EP3722609B1 (de)

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CN108167186B (zh) * 2018-03-05 2024-07-12 珠海格力电器股份有限公司 螺杆压缩机及空调机组
CN109578275A (zh) * 2018-12-27 2019-04-05 珠海格力电器股份有限公司 双级螺杆压缩机及其使用的双级转子组安装结构
CN110388320A (zh) * 2019-08-26 2019-10-29 珠海格力电器股份有限公司 具有平衡轴向力功能的双级螺杆压缩机及空调机组
CN114033681A (zh) * 2021-11-08 2022-02-11 中北大学 一种基于螺旋型双爪转子的复合式真空泵
TWI856706B (zh) * 2023-06-17 2024-09-21 復盛股份有限公司 流體機械及其操作方法
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DE102023121913A1 (de) * 2023-08-16 2025-02-20 R-718 Spindel GbR (vertretungsberechtigter Gesellschafter: Dietmar Rook, 25421 Pinneberg) Mehrflutige Kompressoren mit nicht parallelen Rotationsachsen

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CN108167186A (zh) 2018-06-15
CN108167186B (zh) 2024-07-12

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