阅读说明：本技术 具有多层涂布的转子螺杆的螺杆压缩机 (Screw compressor with multilayer coated rotor screw ) 是由 安德里亚斯·福斯特 杰拉尔德·威恩 于 2018-04-26 设计创作，主要内容包括：一种螺杆压缩机,其包括压缩机壳体(11),该压缩机壳体具有两个轴向平行地支承在其中的转子螺杆(1、2),而转子螺杆在压缩室(18)内彼此啮合,可通过驱动器进行驱动并且在其旋转运动中彼此同步,其中转子螺杆(1、2)分别具有一件式或者多件式的基体(24)以及突出于端面(5a、5b、5c、5d)的轴端(30),其中基体具有两个端面(5a、5b、5c、5d)以及在其间伸长的异型曲面(12a、12b),其中至少异型曲面(12a、12b)被设计为多层的,包括第一内层(3)和第二外层(4),其中第一内层(3)和第二外层(4)都包括热塑性合成材料或者说由热塑性合成材料形成,其中在第二外层(4)中嵌入了支持磨合过程的颗粒(25)或者孔隙(32),并且热塑性合成材料限定用于容纳颗粒(25)或者说用于形成孔隙(32)的基质。(Screw compressor, comprising a compressor housing (11) having two rotor screws (1, 2) which are mounted therein in an axially parallel manner and which are in engagement with one another in a compression chamber (18) and which can be driven by a drive and are synchronized with one another in their rotational movement, wherein the rotor screws (1, 2) each have a one-part or multi-part base body (24) and a shaft end (30) which projects beyond an end face (5a, 5b, 5c, 5d), wherein the base body has two end faces (5a, 5b, 5c, 5d) and a profile curve (12a, 12b) which is elongate therebetween, wherein at least the profile curve (12a, 12b) is designed in a multi-layer manner and comprises a first inner layer (3) and a second outer layer (4), wherein the first inner layer (3) and the second outer layer (4) both comprise or are formed from a thermoplastic synthetic material, wherein particles (25) or pores (32) supporting the running-in process are embedded in the second outer layer (4), and the thermoplastic synthetic material defines a matrix for receiving the particles (25) or for forming the pores (32).)

1. Screw compressor, comprising a compressor housing (11) having two rotor screws (1, 2) which are mounted therein in an axially parallel manner and which mesh with one another in a compression chamber (18), can be driven by a drive and are synchronized with one another in their rotational movement, wherein the rotor screws (1, 2) each have a one-part or multi-part base body (24) and a shaft end (30) which projects beyond an end face (5a, 5b, 5c, 5d), wherein the base body has two end faces (5a, 5b, 5c, 5d) and a profile curve (12a, 12b) which is elongate therebetween, characterized in that at least the profile curve (12a, 12b) is designed in a multi-layer manner and comprises a first inner layer (3) and a second outer layer (4), wherein the first inner layer (3) and the second outer layer (4) both comprise or consist of a thermoplastic synthetic material In this case, particles (25) or pores (32) supporting the running-in process are embedded in the second outer layer (4), and the thermoplastic synthetic material defines a matrix for receiving the particles (25) or for forming the pores (32).

2. -screw compressor according to claim 1, characterised in that the thermoplastic synthetic material used for forming the first inner layer (3) and the second outer layer (4) is a high-performance thermoplastic synthetic material, in particular a partially crystalline high-performance thermoplastic synthetic material.

3. Screw compressor according to claim 1 or 2, characterised in that the thermoplastic synthetic material used for forming the first inner layer (3) and the second outer layer (4) comprises or at least essentially consists of Polyaryletherketone (PAEK).

4. -screw compressor according to any one of the claims 1 to 3, characterised in that the thermoplastic synthetic material used for forming the first inner layer (3) and the second outer layer (4) comprises or at least essentially consists of Polyetheretherketone (PEEK).

5. Screw compressor according to one of claims 1 to 4, characterised in that the first inner layer (3) is designed without particles (25) or pores (32) supporting a run-in process, but is designed to be at least substantially homogeneous.

6. -screw compressor according to any one of the claims 1 to 5, characterised in that the particles (25) of the second outer layer (4) supporting the run-in process comprise abrasive particles and/or lubricating particles.

7. -screw compressor according to any one of the claims 1 to 6, characterised in that the granules (25) are present in microencapsulated form, whereby at least a first substance is surrounded by a second substance as coating material.

8. -screw compressor according to claim 6, characterised in that the particles (25) consist in particular of aluminium oxide (Al)₂O₃) Silicon dioxide (SiO)₂) Or hollow microspheres (microspheres) made of a thermoplastic synthetic material, in particular formed by hollow microspheres.

9. -screw compressor according to claim 6, characterised in that the granules (25) comprise hollow microspheres (microspheres) made of glass, in particular borosilicate glass, or are formed of glass, in particular borosilicate glass.

10. -screw compressor according to any one of the claims 1 to 9, characterised in that the hardness of the particles (25) of the second outer layer (4) supporting the run-in process is higher (according to the shore hardness) than the matrix defined by the thermoplastic synthetic material.

11. -screw compressor according to any one of the claims 1 to 9, characterised in that the hardness of the particles (25) of the second outer layer (4) supporting the run-in process is lower (according to the shore hardness) than the matrix defined by the thermoplastic synthetic material.

12. -screw compressor according to any one of the claims 1 to 11, characterised in that the first inner layer (3) is joined to the second outer layer by melting.

13. -screw compressor according to any one of the claims 1 to 12, characterised in that the first inner layer (3) forms a substantially homogeneous covering layer and thus an anti-corrosion protection layer.

14. -screw compressor according to any one of the claims 1 to 13, characterised in that the second outer layer (4) defines a running-in layer which is locally cut and/or locally plastically deformed during running-in order to adapt it to the specific operating conditions.

15. -screw compressor according to any one of the claims 1 to 14, characterised in that the particles comprise or are formed by graphite.

16. -screw compressor according to any one of the claims 1 to 15, characterised in that the granules comprise: hexagonal boron nitride, Carbon Nanotubes (CNTs), talc, Polytetrafluoroethylene (PTFE), perfluoroalkoxy Polymer (PFA), fluorinated ethylene propylene copolymer (FEP), and/or other fluoropolymers.

17. -screw compressor according to any one of the claims 1 to 15, characterised in that the granules comprise: alumina (Al)₂O₃) Silicon carbide (SiC), silicon dioxide (SiO)₂) And/or glass, in particular borosilicate glass.

18. -screw compressor according to any one of the claims 1 to 17, characterised in that the layer thickness of the first inner layer (3) before running-in is 5 μm to 50 μm.

19. -screw compressor according to any one of the previous claims, characterised in that the layer thickness of the second outer layer (4) before running-in is 10 μm to 120 μm.

20. -screw compressor according to any one of the previous claims, characterised in that the base body (24) of the rotor screw is made of steel and/or cast iron.

21. -screw compressor according to any one of the claims 1 to 19, characterised in that at least sections of the shaft end (30) are uncoated, in any case not coated with a thermoplastic synthetic material.

22. -screw compressor according to any one of the claims 1 to 21, characterised in that at least sections of the shaft end (30) are coated with the first inner layer (3) made of thermoplastic synthetic material.

23. -screw compressor according to any one of the claims 1 to 22, characterised in that one or both end faces (5a, 5b, 5c, 5d) are also coated in layers in addition to the profiled curved surface (12a, 12b) of at least one rotor screw (1, 2), comprising a first inner layer (3) and a second outer layer (4), whereby both the first inner layer (3) and the second outer layer (4) comprise or are formed of a thermoplastic synthetic material, whereby particles (25) or pores (32) supporting a running-in process are embedded in the second outer layer (4) and the thermoplastic synthetic material defines a matrix for accommodating the particles (25) or for forming the pores (32).

24. Screw compressor according to one of claims 1 to 23, characterised in that the inner wall, such as the outer circumferential surface of the rotor bore (19), the housing end faces (6a, 6b) of the pressure side and/or suction side of the compression chamber (18), is coated with at least a first layer (3), preferably also a second layer (4), wherein both the first layer (3) and the second layer (4) comprise or are formed of a thermoplastic synthetic material, and wherein in the second outer layer (4) particles (25) or pores (32) are embedded which support the running-in process, and which define a matrix for accommodating the particles (25) or for forming the pores (32).

25. Screw compressor according to one of claims 1 to 24, characterised in that the screw compressor is an oil-free compression screw compressor, in particular a dry compression screw compressor.

26. Rotor screw for use in a screw compressor according to one of the preceding claims, wherein the rotor screw (1, 2) has a one-piece or multi-piece base body (24) and a shaft end (30) projecting beyond the end faces (5a, 5b, 5c, 5d), wherein the base body has two end faces (5a, 5b, 5c, 5d) and a profiled curve (12a, 12b) extending therebetween, wherein at least the profiled curve (12a, 12b) is designed as a multilayer comprising a first inner layer (3) and a second outer layer (4), wherein the first inner layer (3) and the second outer layer (4) both comprise or are formed from a thermoplastic synthetic material, characterized in that particles (25) or pores (32) supporting a running-in process are embedded in the second outer layer (4), and the thermoplastic synthetic material defines a matrix for receiving the particles (25) or for forming the pores (32).

27. A method for applying a multilayer coating on a metal face to be coated of a rotor screw or a compression chamber of a screw compressor, the method comprising the steps of:

-pre-treating the metal surface to be coated,

-applying a first inner layer (3) on the metal surface to be coated or on a primer layer which can be designed in particular as a pretreatment layer, the first inner layer comprising or being formed of a thermoplastic synthetic material, and

-applying a second outer layer (4) on the first inner layer (3),

wherein the second outer layer (4) likewise comprises or is formed from a thermoplastic synthetic material, and wherein particles (25) or pores (32) supporting the running-in process are embedded in the second outer layer (4), and the thermoplastic synthetic material defines a matrix for receiving the particles (25) or for forming the pores (32).

28. Method according to claim 26, characterized in that the first inner layer (3) and/or the second outer layer (4) are applied in the form of a wet paint or a powder paint.

29. Method according to claim 27 or 28, characterized in that the first inner layer (3) and the second outer layer (4) can be baked such that the thermoplastic synthetic material melts.

30. Method according to any one of claims 27 to 29, characterized in that the pre-treatment of the metal surface to be coated comprises degreasing of the metal surface, and preferably an additional conditioning of the metal surface is performed, for example by roughening the surface, by spray cleaning or etching, or by applying a conversion coating, for example phosphating, or applying a nanoceramic.