A sliding vane structure and a compressor provided with the same

Abstract

The present invention provides a sliding vane structure and a compressor provided with the same, relating to the technical field of compressors, and solving the technical problem that the existing sliding vane has a large impact on the roller. The sliding vane structure includes an intermediate sliding vane and an outer sliding vane. The number of intermediate sliding vanes is N layers, and the number of outer sliding vanes is N + 1 layers. The outer sliding vanes and the intermediate sliding vanes are alternately arranged in sequence, and N is a positive integer greater than or equal to 1. Wherein, each intermediate sliding vane has an opening groove, so that a cavity structure is formed between the intermediate sliding vane and the adjacent two layers of outer sliding vanes. By arranging the opening groove on the intermediate sliding vane, the weight of the sliding vane is reduced, the reciprocating inertia force during the working process is reduced, the impact on the roller is reduced, and the vibration and noise are reduced. Moreover, a certain amount of lubricating oil can be stored in the cavity structure formed between the intermediate sliding vane and the adjacent two layers of outer sliding vanes, which is beneficial to reducing the temperature in the pump body, improving the volumetric efficiency of the compressor, increasing the refrigerating capacity, and enhancing the comprehensive performance of the compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a sliding vane structure and a compressor provided with the same. Background Art

[0002] As an important component of the compressor, the structure of the vane has a great influence on the performance of the compressor.

[0003] The applicant has found that the prior art has at least the following technical problems:

[0004] During the operation of the compressor, the vane has a great impact on the roller, generating vibration and noise. At the same time, the vane end face serves as an important leakage channel inside the compressor, further reducing the volumetric efficiency of the compressor and deteriorating the overall performance of the compressor. In addition, the temperature inside the compressor is high, which reduces the volumetric efficiency of the compressor and reduces the cooling capacity. Summary of the invention

[0005] The purpose of the present invention is to provide a sliding vane structure and a compressor equipped with the same, which can at least solve the technical problem that the sliding vane has a large impact on the roller in the prior art. The preferred technical solution among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a sliding sheet structure, comprising a middle-layer sliding sheet and an outer-layer sliding sheet, wherein the number of the middle-layer sliding sheets is N, the number of the outer-layer sliding sheets is N+1, the outer-layer sliding sheets and the middle-layer sliding sheets are arranged alternately in sequence, and N is a positive integer greater than or equal to 1; wherein each of the middle-layer sliding sheets has an open groove, so that a cavity structure is formed between the middle-layer sliding sheet and the two adjacent outer-layer sliding sheets.

[0008] Optionally, the number of the open slots is two, and the two open slots separate the middle-layer sliding plate into a middle column and two elastic cantilevers on both sides.

[0009] Optionally, a tail groove is provided at the bottom of the open groove near the elastic cantilever.

[0010] Optionally, the number N=1, and the thickness of the middle layer sliding sheet is equal to the thickness of the outer layer sliding sheet.

[0011] Optionally, the thickness of the middle-layer sliding sheet is not less than 1.2 mm.

[0012] Optionally, the width of the elastic cantilever is not less than 3 mm.

[0013] Optionally, the opening slot is a rectangular slot.

[0014] Optionally, the heads of the middle-layer sliding sheet and the outer-layer sliding sheet are both arc-shaped.

[0015] Optionally, an elastic mechanism is provided in the opening groove.

[0016] Optionally, the elastic mechanism is a bow spring.

[0017] A compressor provided by the present invention comprises a roller and any one of the above-mentioned sliding vane structures, wherein a wedge-shaped sealing space is formed at the connection between the sliding vane structure and the roller.

[0018] The present invention provides a vane structure and a compressor equipped with the same, wherein an open groove is arranged on a middle-layer vane, thereby reducing the weight of the vane, reducing the reciprocating inertia force during operation, reducing the impact on the roller, and reducing vibration and noise; and a certain amount of lubricating oil can be stored in the cavity structure formed between the middle-layer vane and the two adjacent outer-layer vanes, which is beneficial to reducing the temperature inside the pump body, improving the volumetric efficiency of the compressor, increasing the cooling capacity, and improving the comprehensive performance of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 is a schematic diagram of the three-dimensional structure of a first sliding plate structure provided in a specific embodiment of the present invention;

[0021] Figure 2 yes Figure 1 A schematic diagram of the front view of the middle layer sliding plate structure;

[0022] Figure 3 It is a schematic diagram of the structure after a bow spring is placed in the open groove of the first sliding plate structure;

[0023] Figure 4 1 is a schematic diagram of the top view of the first type of sliding vane structure;

[0024] Figure 5 is a schematic diagram of a top view of a second sliding plate structure provided in a specific embodiment of the present invention, wherein the scheme adopts a five-layer sliding plate;

[0025] Figure 6 1 is a schematic structural diagram of a third type of sliding plate structure provided in a specific embodiment of the present invention, in which the opening groove is in an arc shape;

[0026] Figure 7 1 is a schematic structural diagram of a fourth sliding plate structure provided in a specific embodiment of the present invention, in which the opening groove is a triangle;

[0027] Figure 8 It is a schematic diagram of the matching structure of a roller and a sliding vane of a compressor provided by a specific embodiment of the present invention;

[0028] Fig. 9 yes Figure 8 Schematic diagram of the local enlarged structure of part C in the middle.

[0029] In the figure, 1, middle sliding vane; 11, opening groove; 111, tail groove; 12, middle column; 13, elastic cantilever; 2, outer sliding vane; 3, bow spring; 4, roller; 5, wedge-shaped sealing space. DETAILED DESCRIPTION

[0030] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0031] like Figure 1-Figure 7 As shown, the present invention provides a sliding sheet structure, including a middle-layer sliding sheet 1 and an outer-layer sliding sheet 2, the number of the middle-layer sliding sheets 1 is N layers, the number of the outer-layer sliding sheets 2 is N+1 layers, the outer-layer sliding sheets 2 and the middle-layer sliding sheets 1 are alternately arranged in sequence, and N is a positive integer greater than or equal to 1; wherein each middle-layer sliding sheet 1 has an open groove 11, so that a cavity structure is formed between the middle-layer sliding sheet 1 and the two adjacent outer-layer sliding sheets 2.

[0032] The middle-layer sliding vane 1 is provided with an open groove 11, which reduces the weight of the sliding vane, reduces the reciprocating inertia force during operation, reduces the impact on the roller 4, and reduces vibration and noise; and a certain amount of lubricating oil can be stored in the cavity structure formed between the middle-layer sliding vane 1 and the two adjacent outer-layer sliding vanes 2, which is beneficial to reducing the temperature inside the pump body, improving the volumetric efficiency of the compressor, increasing the cooling capacity, and improving the comprehensive performance of the compressor.

[0033] When the pressure difference of the working chambers on both sides of the vane is greater, five, seven or more layers can be considered, with the outer vanes 2 and the middle vanes 1 arranged alternately, and the gap between the flange end face and the vane forms more cavities with constantly changing volumes, forming a labyrinth seal, which will have a better effect in reducing leakage. Correspondingly, the total thickness of the vane will increase. Figure 5 The case of a five-layer slide is given.

[0034] As an optional implementation, the number of the opening grooves 11 is two, for example, two opening grooves 11 are provided at a distance of more than 3 mm from the upper and lower end surfaces and the head end surface of the middle layer slide 1. The two opening grooves 11 separate the middle layer slide 1 into a middle column 12 and two elastic cantilevers 13 on both sides. The elastic cantilevers 13 of the middle layer slide 1 can perform elastic compensation to reduce leakage of the slide end surface, and can also absorb part of the impact energy to further reduce vibration and noise.

[0035] As an optional implementation, a tail groove 111 is provided at the bottom of the opening groove 11 near the elastic cantilever 13 to increase the elastic cantilever 13. The tail groove 111 has a width of 2 mm and a depth of 2 mm.

[0036] As an optional implementation, Figure 1 As shown, the number N=1, that is, the sliding plate body is composed of three sliding plates, namely, a middle sliding plate 1 and outer sliding plates 2 located on both sides thereof; and the thickness of the middle sliding plate 1 is equal to that of the outer sliding plates 2.

[0037] As an optional embodiment, the middle sliding sheet 1 and the outer sliding sheet 2 have the same thickness, both not less than 1.2 mm. When the thickness is 1.2 mm, the leakage is reduced by about 0.17 times compared with the thickness of 1 mm, and when the thickness is 1.5 mm, the leakage is reduced by about 0.33 times compared with the thickness of 1 mm.

[0038] As an optional implementation, the width of the elastic cantilever 13 is not less than 3 mm. The width is designed to ensure that there is no excessive leakage of the compressor at the elastic cantilever 13, and the space of the opening slot 11 is also considered. When the width of the elastic cantilever 13 increases, in order to control the gap, the stiffness of the spring arranged in the opening slot 11 must also be increased accordingly. Since the space of the spring slot is correspondingly reduced, it is not conducive to the lightweight of the sliding plate and the storage of lubricating oil.

[0039] As an optional implementation, the opening groove 11 is a rectangular groove, which is convenient for processing.

[0040] The shape of the opening slot 11 can also be arc-shaped, triangular, etc., as long as the width of the elastic cantilever 13 and the strength of the middle column 12 are guaranteed. Figure 6 , the triangular opening slot 11 see Figure 7 .

[0041] As an optional implementation, the heads of the middle layer sliding vane 1 and the outer layer sliding vane 2 are both arc-shaped. When the arc-shaped heads of the sliding vanes cooperate with the rollers 4, an independent wedge-shaped sealing space 5 is formed, which generates a certain oil film bearing capacity and is conducive to lubrication. Fig. 9 .

[0042] As an optional implementation, an elastic mechanism is provided in the opening groove 11. During the operation of the compressor, under the action of the elastic mechanism, the elastic cantilever 13 expands and deforms, reducing the gap width between the end face of the sliding vane and the upper and lower flanges, thereby reducing the leakage of the end face of the sliding vane.

[0043] As an optional embodiment, the elastic mechanism is a bow spring 3. The opening of the bow spring 3 faces one side of the elastic cantilever 13, which is more stable. The elastic mechanism can also be replaced by other compression springs, such as leaf springs, spiral springs, etc.

[0044] It is necessary to leave enough space on the upper part of the middle column 12 to cooperate with the spring and ensure that the middle column 12 does not bend or deform during operation.

[0045] like Figure 8 As shown, the present invention further provides a compressor, comprising a roller 4 and any of the above sliding vane structures, wherein a wedge-shaped sealing space 5 is formed at the connection between the sliding vane structure and the roller 4 .

[0046] When the vane structure cooperates with the roller 4, an independent wedge-shaped space is formed. This space stores a certain amount of lubricating oil, which will produce a certain oil film bearing capacity, which is beneficial to lubrication and can also play the role of a labyrinth seal, also reducing leakage and improving the overall performance of the compressor.

[0047] When the gas flows through the gap between the vane and the roller 4, the airflow is throttled once, the pressure and temperature drop, the flow rate increases, and then it flows to the larger wedge-shaped sealing space 5. Due to the sudden increase in volume, a strong vortex is formed, the flow rate is greatly reduced, and the kinetic energy is converted into heat, causing energy loss; therefore, every time the gas passes through the gap and the expanded wedge-shaped sealing space 5, it is equivalent to throttling and expansion, the vortex loses energy again and again, the air pressure continues to drop, and as the pressure continues to drop, the leakage gradually decreases.

[0048] The new structure sliding vane component is consistent with the original sliding vane in terms of external dimensions, including thickness, length and height, and the matching clearance between the sliding vane and the sliding vane slot must be met; the new structure sliding vane is divided into three layers in total, with an outer sliding vane 2 on each side, and a middle sliding vane 1. The middle sliding vane 1 has spring slots on both sides reserved with the width of the elastic cantilever 13 and the width of the middle column 12. The spring slots cut the two sides into elastic cantilevers 13, and a bow spring 3 is added to the slot during installation.

[0049] The leakage at the end face of the sliding vane can be regarded as the leakage of fluid between parallel plates, and the mass flow rate is approximately: Setting the middle-layer slide 1 can reduce the leakage width δ, but the length h of the leakage channel must also be controlled, that is, the thickness of the slide. When the middle-layer slide 1 is too thin, there is no improvement effect. Similarly, to prevent excessive leakage of lubricating oil in the gap into the working chamber, this formula is also used for control. In general, in order to ensure the coordination with the original slide groove and minimize leakage, the three-layer slide is preferably 1 / 3 of the total thickness of the original slide, and the thickness of each slide is recommended to be not less than 1.2mm (1.2mm reduces leakage by about 0.17 times compared with 1mm, and 1.5mm reduces leakage by about 0.33 times compared with 1mm); for ease of processing, the opening groove 11 (spring groove) of the middle-layer slide 1 adopts a square design, and a 2mm wide tail groove 111 is cut near the left and right corners. Cutting this dovetail can be more conducive to the deformation of the elastic cantilever 13, reduce the gap of the end face of the slide, thereby effectively controlling the leakage of the end face of the slide and improving the volumetric efficiency. According to the matching clearance and the elastic modulus of the sliding vane material, a bow spring 3 with a suitable stiffness coefficient is selected to avoid excessive friction loss caused by excessive tension of the sliding vane cantilever due to excessive elasticity of the bow spring 3, resulting in excessive power of the compressor and reduced cooling capacity. The width of the elastic cantilever 13 shall not be less than 3mm, which not only ensures that there will be no excessive external leakage of the compressor here, but also needs to be designed together with the spring. When the width increases, the spring stiffness is also increased accordingly to control the clearance, but the spring slot space will be reduced, which is not conducive to the lightweight of the sliding vane and the storage of lubricating oil. However, if the width of the elastic cantilever 13 is too small, the risk of external leakage will increase. At the same time, the contact area with the outer sliding vanes 2 on both sides will be reduced, the contact stress will increase, and the deformation and the friction caused by the relative movement of the three will also be aggravated, which will also have a negative impact on the power consumption of the compressor.

[0050] In this embodiment, the existing vane structure is thinned and improved to be composed of three layers of vanes, wherein the middle vane 1 is provided with a spring groove and a bow spring 3 is added. A tail groove 111 is provided at the lower part of the spring groove, so that the elastic cantilevers 13 on both sides of the middle vane 1 have a certain flexibility and are easy to deform elastically. After the middle vane 1 is slotted, the weight of the structure is reduced, the impact force on the roller 4 is reduced during operation, and it can deform elastically, absorb impact work, and play a role in vibration reduction and noise reduction; the space inside the vane structure can store a certain amount of lubricating oil, which is conducive to the lubrication of the vane movement, and the lubricating oil can reduce the temperature in the pump body, thereby improving the volumetric efficiency of the compressor; the middle vane 1 is provided with a bow spring 3, and the elastic cantilever 13 is expanded, which can reduce the leakage of the two end surfaces of the vane, and the vane head can form a wedge-shaped sealing space 5, which can store a certain amount of lubricating oil for lubrication, and can better play a labyrinth seal role, so that the compressor leaks less.

[0051] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A sliding vane structure, characterized in that, it includes a middle sliding vane (1) and an outer sliding vane (2), the number of the middle sliding vanes (1) is N layers, the number of the outer sliding vanes (2) is N + 1 layers, the outer sliding vanes (2) and the middle sliding vanes (1) are arranged alternately in sequence, and N is a positive integer greater than or equal to 1; wherein, each of the middle sliding vanes (1) has an opening groove (11), so that a cavity structure is formed between the middle sliding vane (1) and the adjacent two layers of the outer sliding vanes (2); an elastic mechanism is arranged in the opening groove (11).

2. The sliding vane structure according to claim 1, characterized in that, the number of the opening grooves (11) is two, and the two opening grooves (11) divide the middle sliding vane (1) into a middle column (12) and two elastic cantilevers (13) on both sides.

3. The sliding vane structure according to claim 2, characterized in that, a tail groove (111) is opened at the bottom of the opening groove (11) near the elastic cantilever (13).

4. The sliding vane structure according to claim 1, characterized in that, the number N = 1, and the thickness of the middle sliding vane (1) is equal to the thickness of the outer sliding vane (2).

5. The sliding vane structure according to claim 4, characterized in that, the thickness of the middle sliding vane (1) is not less than 1.2 mm.

6. The sliding vane structure according to claim 2, characterized in that, the width of the elastic cantilever (13) is not less than 3 mm.

7. The sliding vane structure according to claim 1, characterized in that, the opening groove (11) is a rectangular groove.

8. The sliding vane structure according to claim 1, characterized in that, the heads of the middle sliding vane (1) and the outer sliding vane (2) are both arc-shaped.

9. The sliding vane structure according to claim 1, characterized in that, the elastic mechanism is a bow spring (3).

10. A compressor, characterized in that, it includes a roller (4) and the sliding vane structure according to any one of claims 1-9, and a wedge-shaped sealing space (5) is formed at the connection between the sliding vane structure and the roller (4).

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