Screw compressor and air conditioning system

Abstract

The utility model relates to a screw compressor and an air-conditioning system, and the screw compressor comprises a shell (1) with a screw cavity; the screw rod (2) comprises a screw rod body (21) arranged in the screw rod cavity; the plate-shaped component (3) is arranged at one end, in the axial direction of the screw (2), of the screw cavity in a replaceable mode, the thickness direction of the plate-shaped component (3) is parallel to the axial direction of the screw (2), and the plate-shaped component (3) is arranged at the exhaust end of the screw body (21). The thickness of the plate-shaped component (3) is changed, so that the volume of the screw cavity and the exhaust end face gap are adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration, and in particular to a screw compressor and an air-conditioning system. Background Art

[0002] A screw compressor includes a shell having a screw cavity and a screw rotatably arranged in the screw cavity. One end of the screw in the length direction is the suction end, and the other end is the exhaust end. The compressed gas enters the screw thread gap from the suction end of the screw. As the screw rotates, the gas is compressed and the compressed gas is discharged at the exhaust end of the screw.

[0003] In the prior art, once the shell is manufactured and formed, the length of the screw cavity is determined and the volume of the compression chamber of the compressor cannot be changed. Utility Model Content

[0004] The utility model aims to provide a screw compressor and an air conditioning system, so as to improve the problem in the prior art that the volume of the compression chamber of the compressor cannot be changed.

[0005] According to one aspect of the embodiments of the present invention, the present invention provides a screw compressor, which in some embodiments includes:

[0006] A housing having a screw cavity;

[0007] A screw, comprising a screw body disposed in a screw cavity; and

[0008] The plate-like component is replaceably arranged at one end of the screw cavity along the axial direction of the screw, the thickness direction of the plate-like component is parallel to the axial direction of the screw, and the plate-like component is arranged at the exhaust end of the screw body so that the volume of the screw cavity and the exhaust end face gap can be adjusted by changing the thickness of the plate-like component.

[0009] In some embodiments, the plate-shaped component is provided with an exhaust portion for outputting the gas compressed by the screw.

[0010] In some embodiments, the exhaust portion includes an inlet provided on an end surface of one end of the plate-shaped member along the axial direction of the screw and an outlet provided on a peripheral surface of an outer end of the plate-shaped member along the radial direction of the screw.

[0011] In some embodiments, an exhaust channel communicating with the screw cavity is provided on the shell, and the exhaust channel is connected with the outlet of the exhaust part.

[0012] In some embodiments, at least a portion of the exhaust passage is connected to and communicates with an outlet of the exhaust portion.

[0013] In some embodiments, the plate-like component is attached to the end surface of the screw cavity at the exhaust end of the screw body.

[0014] In some embodiments, the circumferential surface of the outer end of the plate-like component along the radial direction of the screw is sealingly matched with the inner circumferential wall of the screw cavity.

[0015] In some embodiments, the screw further includes a connecting shaft disposed at the exhaust end of the screw body, the plate-like component is provided with an axial hole allowing the connecting shaft to pass through, and the connecting shaft is sealingly matched with the hole wall of the axial hole.

[0016] In some embodiments, the length of the screw body is L1, and the thickness of the plate-like component is L, wherein L / (L+L1)≤20%.

[0017] According to another aspect of the utility model, an air-conditioning system is also provided, and the air-conditioning system includes the above-mentioned screw compressor.

[0018] By applying the technical solution of the present application, the plate-like component can be filled in the screw cavity to reduce the length and ease of the screw cavity, and the exhaust end face clearance of the screw body can also be changed, which is conducive to realizing the derivative design of different exhaust volumes of the screw compressor. Furthermore, by controlling the thickness of the plate-like component to adjust the exhaust end face clearance, the traditional exhaust end face clearance adjustment method is replaced, and the structure is simple and reliable.

[0019] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 A schematic structural diagram of a screw compressor according to an embodiment of the utility model is shown;

[0022] Figure 2 A partial cross-sectional structural schematic diagram of a screw compressor according to an embodiment of the utility model is shown;

[0023] Figure 3 A partial cross-sectional structural schematic diagram of a screw compressor according to an embodiment of the utility model is shown; and

[0024] Figure 4 A schematic diagram of the three-dimensional structure of a plate-shaped component of a screw compressor according to an embodiment of the utility model is shown;

[0025] Figure 5A schematic structural diagram of a plate-shaped component of a screw compressor according to an embodiment of the utility model is shown;

[0026] Figure 6 A structural schematic diagram of a bearing seat of a screw compressor according to an embodiment of the utility model is shown;

[0027] Figure 7 A partial structural schematic diagram of a screw compressor with a first plate-shaped component according to an embodiment of the utility model is shown;

[0028] Figure 8 A partial structural schematic diagram of a screw compressor with a second plate-shaped component according to an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0030] See also Figures 1 to 5 As shown, the screw compressor of this embodiment includes a housing 1, a screw 2 and a plate-shaped component 3. The housing 1 has a screw cavity. The screw 2 includes a screw body 21 arranged in the screw cavity.

[0031] The plate-like component 3 is replaceably arranged at one end of the screw cavity along the axial direction of the screw 2, the thickness direction of the plate-like component 3 is parallel to the axial direction of the screw 2, and the plate-like component 3 is arranged at the exhaust end of the screw body 21, so that the volume of the screw cavity and the exhaust end face gap can be adjusted by changing the thickness of the plate-like component 3.

[0032] In this embodiment, the plate-like component 3 can be filled in the screw cavity to reduce the length and volume of the screw cavity, and can also change the exhaust end face clearance of the screw body 21, which is conducive to realizing the derivative design of different exhaust volumes of the screw compressor. Furthermore, the exhaust end face clearance is adjusted by controlling the thickness of the plate-like component 3, replacing the traditional exhaust end face clearance adjustment method, and the structure is simple and reliable.

[0033] Figure 7 and Figure 8 The schematic structural diagrams of compressors with plate-like components 3 of different thicknesses are shown respectively.

[0034] In this embodiment, the screw 2 also includes a connecting shaft 22 arranged at the exhaust end of the screw body 21, wherein the connecting shaft 22 includes a first shaft section close to the screw body 21 and a second shaft section connected to the first shaft section, and the diameter of the first shaft section is larger than the diameter of the second shaft section. The plate-like component 3 is provided with an axial hole 32 adapted to the first shaft section, and the plate-like component 3 is sleeved on the first shaft section. A bearing seat 5 is provided at the exhaust end of the screw body 21, and the bearing seat 5 includes a first hole section 51 adapted to the first shaft section and a second hole section adapted to the outer diameter of the first bearing 4 sleeved on the second shaft section, and the inner diameter of the second hole section is larger than the first hole section. The length of the first shaft section of the connecting shaft 22 is L2. The length of the first hole section 51 of the bearing seat 5 adapted to the first shaft section is D3, see Figure 3 and 6 .

[0035] The thickness of the plate-like member 3 is L, the width of the inner ring of the first bearing 4 is D2, and the width of the outer end of the first bearing 4 is D2.

[0036] Optionally, the first bearing 4 is a cylindrical roller bearing. In some embodiments, a second bearing is further provided on the side of the first bearing 4 away from the first shaft section, and the second bearing is sleeved on the second shaft section of the connecting shaft 22 and located in the second hole section of the bearing seat 5. In some embodiments, the second bearing is a ball bearing.

[0037] Exhaust end face clearance C = (L1-D3-L) + (D2-D1). In this embodiment, only a single plate-shaped component 3 is used to adjust the exhaust end face clearance. Conventional clearance adjustment requires the use of inner and outer adjustment rings, and the prerequisite is that the initial clearance C will only be less than or equal to the design value (which can be controlled by macroscopic dimensions), and then only the exhaust sealing plate thickness L needs to be reduced to meet the clearance requirement.

[0038] The plate-like component 3 is provided with an exhaust portion 31 for outputting the gas compressed by the screw 2. Providing the exhaust portion on the plate-like component 3 replaces the conventional mode of providing the exhaust portion on the bearing seat 5, diversifies the selection and design of the exhaust portion, and makes the bearing seat 5 more versatile.

[0039] In some embodiments, the exhaust portion 31 includes an inlet provided on the end surface of one end of the plate-shaped member 3 along the axial direction of the screw 2 and an outlet provided on the peripheral surface of the outer end of the plate-shaped member 3 along the radial direction of the screw 2. The inlet of the plate-shaped member 3 is connected to the exhaust port of the screw body 1. The gas compressed by the screw body 21 enters the inlet of the exhaust portion 31 and is discharged from the outlet.

[0040] In some embodiments, the housing 1 is provided with an exhaust channel communicating with the screw cavity, and the exhaust channel is connected with the outlet of the exhaust part 31. The gas compressed by the screw body 21 is discharged from the outlet of the exhaust part 31 along the radial direction of the screw 2 to the exhaust channel, and there is no need to provide a channel for circulating the compressed gas on the bearing seat 5.

[0041] In some embodiments, at least a portion of the exhaust channel is connected to and communicates with the outlet of the exhaust portion 31. The gas discharged from the exhaust portion 31 is directly discharged from the exhaust channel connected to the screw cavity, and there is no need to set a channel on the bearing seat 5 for circulating the compressed gas.

[0042] In some embodiments, the plate-shaped component 3 is connected to a side of the bearing seat 5 adjacent to the screw cavity. The plate-shaped component 3 is provided with a mounting hole 33 for a threaded connector connecting the plate-shaped component 3 and the bearing seat 5 .

[0043] In some embodiments, the plate-like component 3 is attached to the end surface of the screw cavity at the exhaust end of the screw body 21. The plate-like component 3 is attached to the screw cavity, which is beneficial to reducing the volume of the clearance increased by the arrangement of the plate-like component 3, and is beneficial to improving the compression efficiency of the compressor and ensuring the compression ratio of the compressor.

[0044] In some embodiments, the circumferential surface of the outer end of the plate-like component 3 along the radial direction of the screw 2 is sealed with the inner circumferential wall of the screw cavity, which is beneficial to reduce the clearance of the compression chamber of the compressor and improve the compression efficiency and compression ratio of the compressor.

[0045] In some embodiments, the screw 2 further includes a connecting shaft 22 disposed at the exhaust end of the screw body 21, and the plate-shaped component 3 is provided with an axial hole 32 allowing the connecting shaft 22 to pass through, and the connecting shaft 22 is sealed with the hole wall of the axial hole 32. This is beneficial to reducing the clearance of the compression chamber of the compressor and improving the compression efficiency and compression ratio of the compressor.

[0046] In some embodiments, the length of the screw body 21 is L1, and the thickness of the plate-like component 3 is L, wherein L / (L+L1)≤20%. The design of the compressor derivative model is realized by changing the length of the screw body 21 and adding the plate-like component 3, and the thickness L of the plate-like component 3 needs to satisfy L / (L+L1)≤20%.

[0047] In this embodiment, the screw 2 includes a male rotor and a female rotor meshing with the male rotor, and the plate-like component 3 includes a first plate-like component respectively arranged at the exhaust end of the male rotor and a second plate-like component respectively arranged at the exhaust end of the female rotor. The outer diameter R1 of the first plate-like component is the same as the outer diameter of the male rotor, and the outer diameter R2 of the second plate-like component is the same as the outer diameter of the female rotor. The first plate-like component and the second plate-like component are respectively provided with an exhaust portion 31, and the structure of the exhaust portion 31 can be set according to the actual operating conditions of the compressor. The exhaust portion 31 is arranged on the plate-like component 3 to make it operable and easy to adjust. In addition, the structure of the plate-like component 3 can be designed as a whole, processed and assembled as a whole; it can also be designed in half as shown in the figure, divided along the intersection of the two circles of the first plate-like component and the second plate-like component, and processed and assembled separately.

[0048] In this embodiment, the screw compressor further comprises a driving component 6 disposed at one end of the screw 2 away from the bearing seat 5, and the driving component 6 is drivingly connected to the screw to change the rotation of the screw to compress the gas.

[0049] According to another aspect of the present invention, an air-conditioning system is further provided. In some embodiments, the air-conditioning system includes the above-mentioned screw compressor.

[0050] The above are only exemplary embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A screw compressor, characterized in that: include: A housing (1) having a screw cavity; A screw (2) comprising a screw body (21) disposed in the screw cavity; as well as A plate-like component (3) is replaceably arranged at one end of the screw cavity along the axial direction of the screw (2); the thickness direction of the plate-like component (3) is parallel to the axial direction of the screw (2); and the plate-like component (3) is arranged at the exhaust end of the screw body (21) so that the volume of the screw cavity and the exhaust end face clearance can be adjusted by changing the thickness of the plate-like component (3).

2. The screw compressor according to claim 1, characterized in that: The plate-shaped member (3) is provided with an exhaust portion (31) for outputting the gas compressed by the screw (2).

3. The screw compressor according to claim 2, characterized in that: The exhaust portion (31) includes an inlet provided on an end surface of one end of the plate-shaped member (3) along the axial direction of the screw (2) and an outlet provided on a peripheral surface of an outer end of the plate-shaped member (3) along the radial direction of the screw (2).

4. The screw compressor according to claim 3, characterized in that: The shell (1) is provided with an exhaust channel communicating with the screw cavity, and the exhaust channel is connected with the outlet of the exhaust part (31).

5. The screw compressor according to claim 4, characterized in that: At least a portion of the exhaust passage is connected to and communicates with the outlet of the exhaust portion (31).

6. The screw compressor according to claim 1, characterized in that: The plate-shaped component (3) is attached to the end surface of the screw cavity located at the exhaust end of the screw body (21).

7. The screw compressor according to claim 1, characterized in that: The circumferential surface of the outer end of the plate-like component (3) along the radial direction of the screw (2) is sealingly matched with the inner circumferential wall of the screw cavity.

8. The screw compressor according to claim 1, characterized in that: The screw (2) further comprises a connecting shaft (22) arranged at the exhaust end of the screw body (21); the plate-shaped component (3) is provided with an axial hole (32) allowing the connecting shaft (22) to pass through; the connecting shaft (22) is sealingly matched with the hole wall of the axial hole (32).

9. The screw compressor according to claim 1, characterized in that: The length of the screw body (21) is L1, and the thickness of the plate-like component (3) is L, wherein L / (L+L1)≤20%.

10. An air conditioning system, characterized in that: A screw compressor comprising the screw compressor according to any one of claims 1 to 9.

Images