Split double-sided scroll compressor adopting diagonal spring for axial compensation

Abstract

The utility model discloses a split double-sided scroll compressor adopting diagonal spring axial compensation, which comprises a low-pressure end assembly, a brushless motor assembly and a high-pressure end assembly which are sequentially connected, each of the low-pressure end assembly and the high-pressure end assembly comprises an inner end cover, an outer end cover, an inner movable disc and an outer movable disc, and the inner end covers and the outer end covers are provided with molded line slots. After the inner end cover and the outer end cover are connected, a cavity used for installing the inner movable disc and the outer movable disc is formed in the inner end cover and the outer end cover, the molded line end of the inner movable disc is inserted into a molded line inserting groove of the inner end cover in a matched mode, the molded line end of the outer movable disc is inserted into a molded line inserting groove of the outer end cover in a matched mode, and a sealing ring with an oblique line spring is arranged between the outer movable disc and the inner movable disc. Motor shafts at the two ends of the brushless motor assembly are inserted into the low-pressure end assembly and the high-pressure end assembly respectively and are connected with the inner movable disc and the outer movable disc, and according to the compressor, abrasion of sealing positions and the movable discs is effectively reduced, friction loss of sealing rings is reduced, and the service life of the compressor is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressors, and particularly relates to a split double-sided scroll compressor with axial compensation by an inclined spring. Background Art

[0002] Scroll oil-free compressors mainly include components such as end covers and moving disks. The end cover and the moving disk maintain planar motion with a small radius at the lower part within a certain relative range. The two engage to form several pairs of crescent-shaped closed compression chambers. The gas inhaled into the working chamber is gradually compressed by the subsequently formed crescent-shaped compression chambers and finally discharged from the exhaust port. The moving disk of the existing scroll oil-free compressor generally adopts an integral structure (as shown in Figure 4 ), and sealing strips are installed on both end faces of the moving disk for sealing. Using this structure has the following problems: after the moving disk is worn, it is easy to leak air, resulting in performance degradation, and the sealing strips need to be replaced regularly; when foreign particulate matter enters, it will accelerate the wear of the moving disk and the sealing strips. Summary of the Utility Model

[0003] The purpose of the utility model is to solve at least one problem of the existing technology, and propose a split double-sided scroll compressor with axial compensation by an inclined spring.

[0004] To achieve the above purpose, the utility model proposes a split double-sided scroll compressor with axial compensation by an inclined spring, which includes a low-pressure end assembly, a brushless motor assembly, and a high-pressure end assembly connected in sequence. The low-pressure end assembly and the high-pressure end assembly both include an inner end cover, an outer end cover, an inner moving disk, and an outer moving disk. The inner end cover and the outer end cover are both provided with profile slots. After the inner end cover and the outer end cover are connected, a cavity for installing the inner moving disk and the outer moving disk is formed inside. The profile end of the inner moving disk is inserted into the profile slot of the inner end cover in a matching manner, and the profile end of the outer moving disk is inserted into the profile slot of the outer end cover in a matching manner. A sealing ring with an inclined spring is arranged between the outer moving disk and the inner moving disk. The motor shafts at both ends of the brushless motor assembly are respectively inserted into the low-pressure end assembly and the high-pressure end assembly, and are connected to the inner moving disk and the outer moving disk.

[0005] Preferably, the non-profile end of the inner moving disk is connected to the outer moving disk through a synchronizing ring.

[0006] Preferably, several connecting parts are arranged on the outer sides of the synchronizing ring, the inner moving disk, and the outer moving disk. The connecting parts are provided with connecting holes, and the synchronizing ring, the inner moving disk, and the outer moving disk are connected by pin shafts, and the pin shafts are installed in the connecting holes in a matching manner.

[0007] Preferably, an installation groove is arranged at the non-profile end of the inner moving disk, and the sealing ring is installed in the installation groove in a matching manner.

[0008] Preferably, the inner end cover and the outer end cover are fixed by fasteners, and a sealing gasket is arranged on the contact surface between the inner end cover and the outer end cover.

[0009] Preferably, the outer side of the motor shaft is coaxially connected to the inner moving disk and the outer moving disk by a bushing or a bearing respectively.

[0010] Advantages of the present utility model: By adopting a split moving disk structure, the profile end of the outer moving disk is directly inserted and mated with the profile slot of the outer end cover, and the profile end of the inner moving disk is directly inserted and mated with the profile slot of the inner end cover. A sealing ring with an inclined spring is arranged between the inner moving disk and the outer moving disk. The spring in the sealing ring provides an axial compensation effect for the two moving disks through elastic deformation. The two moving disks rotate synchronously, ultimately effectively reducing the wear of the sealing part and the moving disks, reducing the frictional loss of the sealing ring, and improving the service life of the compressor.

[0011] The features and advantages of the present utility model will be described in detail through embodiments in conjunction with the accompanying drawings. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of an embodiment of the present utility model.

[0013] Figure 2 is a schematic diagram of the split of the low-pressure end assembly of an embodiment of the present utility model.

[0014] Figure 3 is a cross-sectional view of the low-pressure end assembly of an embodiment of the present utility model.

[0015] Figure 4 is a schematic diagram of the moving disk installation structure of an existing scroll oil-free compressor.

[0016] In the figure: 1 - low-pressure end assembly, 2 - brushless motor assembly, 3 - high-pressure end assembly, 4 - outer end cover, 5 - outer moving disk, 6 - sealing ring, 7 - synchronizing ring, 8 - inner moving disk, 9 - inner end cover. Detailed Embodiments

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Components of the embodiments of the present application usually described and illustrated in the drawings here can be arranged and designed in various different configurations. In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "inner" and "outer" is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of this application is normally placed, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, terms such as "first" and "second" are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0018] In the description of the present application, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0019] The following will describe the present utility model in detail with reference to the accompanying drawings.

[0020] Refer to Figure 1 、 Figure 2 、 Figure 3 , this embodiment provides a split double-sided scroll compressor with axial compensation by a diagonal spring, which includes a low-pressure end assembly 1, a brushless motor assembly 2, and a high-pressure end assembly 3 connected in sequence. The low-pressure end assembly 1 and the high-pressure end assembly 3 both include an inner end cover 9, an outer end cover 4, an inner moving disk 8, and an outer moving disk 5. The inner end cover 9 and the outer end cover 4 are both provided with profile slots. After the inner end cover 9 and the outer end cover 4 are connected, a cavity for installing the inner moving disk 8 and the outer moving disk 5 is formed inside. The profile end of the inner moving disk 8 is inserted into the profile slot of the inner end cover 9 in a matching manner, and the profile end of the outer moving disk 5 is inserted into the profile slot of the outer end cover 4 in a matching manner. A sealing ring 6 with a diagonal spring is arranged between the outer moving disk 5 and the inner moving disk 8. The motor shafts at both ends of the brushless motor assembly 2 are respectively inserted into the low-pressure end assembly 1 and the high-pressure end assembly 3, and are connected to the corresponding inner moving disk 8 and outer moving disk 5.

[0021] Among them, the inner end covers, outer end covers, inner moving disks, and outer moving disks of the low-pressure end assembly 1 and the high-pressure end assembly 3 are the same in structure except for the differences in size, the number and size of the holes opened on the outer end cover. The profile slot is a scroll slot adapted to the profiles of the corresponding inner moving disk 8 and outer moving disk 5. The sealing ring 6 with a diagonal spring is purchased on the market and is an existing structure, so it will not be elaborated too much in this application. The brushless motor assembly 2 is an existing structure. A channel for gas flow is left between the low-pressure end assembly 1, the brushless motor assembly 2, and the high-pressure end assembly 3. The outer end covers of the low-pressure end assembly 1 and the high-pressure end assembly 3 are provided with ventilation holes communicating with the channel. The inner moving disk 8 and the outer moving disk 5 are both made of wear-resistant metal materials.

[0022] In this embodiment, the non-profile end of the inner moving disk 8 is connected to the outer moving disk 5 through a synchronizing ring 7 to ensure that the inner moving disk 8 and the outer moving disk 5 can rotate synchronously.

[0023] Further, several connecting parts are provided on the outer sides of the synchronizing ring 7, the inner moving disk 8 and the outer moving disk 5. The inner end cover 9, the connecting parts and the outer end cover 4 are all provided with connecting holes. The inner end cover 9, the inner moving disk 8, the synchronizing ring 7, the outer moving disk 5 and the outer end cover 4 are connected by pin shafts, and the pin shafts are fitted and installed in the connecting holes. The number of the connecting parts includes but is not limited to 3 or 4.

[0024] In this embodiment, an installation groove is provided at the non-profile line end of the inner moving disk 8. The sealing ring 6 is fitted and installed in the installation groove. The thickness of the sealing ring 6 is greater than the depth of the installation groove, and the sealing ring 6 abuts against the end face of the non-profile line end of the outer moving disk 5.

[0025] In this embodiment, the inner end cover 9 and the outer end cover 4 are fixed by fasteners. A sealing washer is provided on the contact surface between the inner end cover 9 and the outer end cover 4. The fasteners include but are not limited to screws or pins.

[0026] In this embodiment, the outer side of the motor shaft is coaxially connected to the inner moving disk and the outer moving disk by a bushing or a bearing respectively.

[0027] The working process of the present utility model:

[0028] During the working process of this split double-sided scroll compressor, the motor shaft of the brushless motor assembly 2 rotates to drive the inner moving disk 8 and the outer moving disk 5 of the low-pressure end assembly 1 and the high-pressure end assembly 3 to rotate. When the inner moving disk 8 and the outer moving disk 5 rotate, a planar motion with a small radius is maintained within a certain relative range between the profile line slots of the corresponding inner end cover 9 and the outer end cover 4. The two engage to form several pairs of crescent-shaped closed compression chambers. The gas inhaled from the vent hole of the low-pressure end assembly 1 is gradually compressed by the subsequently formed crescent-shaped compression chambers and flows along the internal channels, and finally is discharged from the vent hole of the high-pressure end assembly 3.

[0029] During the working process, the sealing ring 6 with a diagonal spring compensates for the axial clearance between the inner moving disk 8 and the outer moving disk 5 to ensure that the pressure received at each point of the circumference is basically the same. At the same time, when foreign particles enter, the flexible axial characteristics of the diagonal spring can also be used to reduce the influence of foreign particles on the service life of the compressor; the inner moving disk 8 and the outer moving disk 5 are connected by the synchronizing ring 7, so that the inner moving disk 8 and the outer moving disk 5 can move synchronously to greatly reduce the frictional loss to the sealing ring; the profile line end of the outer moving disk 5 is directly fitted and inserted into the profile line slot of the outer end cover 4, and the profile line end of the inner moving disk 8 is directly fitted and inserted into the profile line slot of the inner end cover 9, avoiding the wear caused by the friction between the traditional moving disk profile line and the sealing strip.

[0030] The above embodiments are illustrative of the present utility model, not restrictive of the present utility model. Any scheme obtained by simply transforming the present utility model belongs to the protection scope of the present utility model.

Claims

1. A split double-sided scroll compressor with axial compensation using a diagonal spring, characterized in that: It includes a low-voltage end assembly, a brushless motor assembly, and a high-voltage end assembly connected in sequence. Both the low-voltage end assembly and the high-voltage end assembly include an inner end cover, an outer end cover, an inner moving disk, and an outer moving disk. The inner end cover and the outer end cover are both provided with profile slot. After the inner end cover and the outer end cover are connected, a cavity for installing the inner moving disk and the outer moving disk is formed inside. The profile end of the inner moving disk is inserted into the profile slot of the inner end cover in a matching manner, and the profile end of the outer moving disk is inserted into the profile slot of the outer end cover in a matching manner. A sealing ring with an inclined spring is provided between the outer moving disk and the inner moving disk. The motor shafts at both ends of the brushless motor assembly are respectively inserted into the low-voltage end assembly and the high-voltage end assembly and are connected to the inner moving disk and the outer moving disk.

2. The split double-sided scroll compressor with axial compensation using a diagonal spring as claimed in claim 1, wherein: The non-profile end of the inner moving disk is connected to the outer moving disk through a synchronizing ring.

3. The split double-sided scroll compressor with axial compensation using an inclined spring as claimed in claim 2, wherein: A number of connecting parts are provided on the outer sides of the synchronizing ring, the inner moving disk, and the outer moving disk. The connecting parts are provided with connecting holes. The synchronizing ring, the inner moving disk, and the outer moving disk are connected by a pin shaft, and the pin shaft is installed in the connecting hole in a matching manner.

4. The split double-sided scroll compressor with axial compensation using an inclined spring as claimed in claim 1, wherein: The non-profile end of the inner moving disk is provided with an installation groove, and the sealing ring is installed in the installation groove in a matching manner.

5. The split double-sided scroll compressor with axial compensation using an inclined spring as claimed in claim 1, wherein: The inner end cover and the outer end cover are fixed with fasteners, and a sealing washer is provided on the contact surface between the inner end cover and the outer end cover.

6. The split double-sided scroll compressor with axial compensation by diagonal springs as claimed in claim 1, wherein: The outer sides of the motor shafts are coaxially connected to the inner moving disk and the outer moving disk with a bush or a bearing respectively.

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