Pump body assembly, compressor and refrigeration device

Abstract

The utility model discloses a pump body assembly, compressor and refrigeration plant relates to compressor technical field, wherein, pump body assembly includes: cylinder is equipped with working chamber and with sliding slot who communicates with working chamber, piston can eccentric rotation be equipped in working chamber, and sliding vane includes sliding vane body and the hinged part of being equipped with one end of sliding vane body, sliding vane body is slidably equipped in sliding slot, the hinged part is hinged with piston, the hinged part has the pair of abrasive surface to piston, and the pair of abrasive surface is equipped with DLC coating. The utility model provides technical scheme can reduce the abrasion of sliding vane, and then can prolong the service life of sliding vane and compressor.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a pump body assembly, a compressor, and a refrigeration device. Background Technology

[0002] In traditional compressors, the vane's end near the piston typically abuts against the piston, with no direct connection between the vane and piston. This structure is prone to gas leakage and produces significant vane noise, resulting in lower compressor efficiency and reliability. In contrast, articulated compressors connect the vane and piston, effectively reducing gas leakage during compression, improving vane noise, and enhancing compressor efficiency and reliability compared to traditional designs. However, the articulated structure also experiences higher pressure on the suction side, potentially leading to accelerated wear in the articulated area during long-term operation, thus affecting the lifespan of both the vane and the compressor itself. Utility Model Content

[0003] The main purpose of this invention is to provide a pump body assembly, a compressor, and a refrigeration device, which aims to solve the technical problem that the sliding vanes of a hinged compressor are prone to localized accelerated wear, affecting the service life of the sliding vanes and the compressor.

[0004] To achieve the above objectives, the pump body assembly proposed in this utility model includes:

[0005] The cylinder has a working chamber and a sliding groove communicating with the working chamber;

[0006] A piston, rotatably disposed within the working chamber; and

[0007] A sliding plate includes a sliding plate body and a hinge portion disposed at one end of the sliding plate body. The sliding plate body is slidably disposed in the sliding groove. The hinge portion is hinged to the piston. The hinge portion has a grinding surface facing the piston. The grinding surface is provided with a DLC coating.

[0008] In one embodiment, the thickness of the DLC coating is not less than 2 micrometers and not more than 6 micrometers;

[0009] And / or, the hardness of the DLC coating is not less than 1600 Hv;

[0010] And / or, the surface roughness Rz of the DLC coating is not greater than 1.6 micrometers.

[0011] In one embodiment, the hinge portion forms a coating substrate at the bottom of the DLC coating, and the coating substrate is made of stainless steel or high-speed steel.

[0012] In one embodiment, the coating substrate is made of 11Cr17 stainless steel or M2 high-speed steel.

[0013] In one embodiment, the hinge portion forms a coating substrate at the bottom of the DLC coating, and the surface hardness of the coating substrate is not less than 450 Hv.

[0014] In one embodiment, the length of the slider along the radial direction of the piston is L, and the height of the slider along the axial direction of the piston is H, such that the ratio of L to H is not less than 1 and not greater than 1.5.

[0015] In one embodiment, the connection portion between the hinge and the slide body has a groove on at least one side in the thickness direction of the slide.

[0016] In one embodiment, the outer peripheral wall of the piston is provided with a hinge groove, and the hinge portion is hinged in the hinge groove;

[0017] Alternatively, the outer peripheral wall of the piston is provided with a protrusion, the hinge part is provided with a hinge groove, and the protrusion is hinged in the hinge groove.

[0018] This utility model also proposes a compressor, comprising:

[0019] Crankshaft;

[0020] As described above, in the pump body assembly, the piston is sleeved around the crankshaft; and

[0021] An electric motor is connected to the crankshaft drive and is used to drive the crankshaft to rotate, thereby causing the piston to rotate eccentrically within the working chamber.

[0022] This utility model also proposes a refrigeration device, including the compressor described above.

[0023] The technical solution of this utility model adopts a hinged pump body assembly, in which the vane is hinged to the piston through a hinge joint. This increases the connection rigidity between the vane and the piston, effectively reducing gas leakage during gas compression, improving vane noise, and enhancing compressor efficiency and reliability. Furthermore, by applying a DLC coating to the friction surface of the vane, the friction surface of the vane has superior wear resistance and lubrication, which can mitigate the accelerated wear of the hinge joint, thereby reducing vane wear and extending the service life of both the vane and the compressor. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the structure of an embodiment of the pump body assembly provided by this utility model.

[0026] Explanation of icon numbers:

[0027] 10. Cylinder; 20. Piston; 30. Sliding vane; 31. Sliding vane body; 32. Hinge.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0030] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] A rolling rotor compressor generally includes a motor, crankshaft, and pump body assembly. The pump body assembly includes a cylinder, piston, and vanes. The cylinder has a working chamber and a groove communicating with the working chamber. The piston is rotatably disposed within the working chamber, and the vanes are slidably disposed within the groove. One end of the vanes engages with the piston, which is sleeved around the eccentric portion of the crankshaft. One end of the crankshaft is connected to the output shaft of the motor. When the compressor operates, the motor drives the crankshaft to rotate, which in turn drives the piston to rotate eccentrically within the working chamber of the cylinder via the eccentric portion of the crankshaft. As the piston rotates eccentrically, it drives the vanes to move along the groove. The vanes and piston divide the working chamber into an intake chamber and a compression chamber. The intake chamber has an intake port, and the compression chamber has an exhaust port. As the piston rotates, the volumes of the exhaust chamber and the intake chamber change, thus realizing the intake, compression, and exhaust processes to compress the working medium.

[0033] In traditional compressors, the end of the vane closest to the piston is usually in contact with the piston, and there is no connection between the vane and the piston. This structure is prone to gas leakage and produces a loud vane noise, resulting in lower compressor efficiency and reliability.

[0034] In related technologies, compressors with articulated structures connect the vanes and pistons. Compared to compressors with traditional structures, this effectively reduces gas leakage during gas compression, improves vane noise, and enhances compressor efficiency and reliability. However, the articulated structure also experiences greater pressure on the suction side, which can lead to accelerated localized wear during long-term compressor operation, affecting the service life of both the vanes and the compressor. Therefore, higher requirements are placed on the wear resistance and lubrication of the vane's mating surfaces.

[0035] Based on this, this utility model proposes a pump body assembly that optimizes the structure of the sliding vane to improve the gas leakage problem caused by the traditional sliding vane structure, reduce the vane noise, and improve the energy efficiency and reliability of the compressor. At the same time, it can also improve the wear resistance and lubrication of the sliding vane and extend the service life of the sliding vane and the compressor.

[0036] Please see Figure 1 In one embodiment of this utility model, the pump assembly includes a cylinder 10, a piston 20, and a slide vane 30. The cylinder 10 has a working chamber and a groove communicating with the working chamber; the piston 20 is eccentrically rotatably disposed in the working chamber; the slide vane 30 includes a slide vane body 31 and a hinge portion 32 disposed at one end of the slide vane body 31, the slide vane body 31 is slidably disposed in the groove, the hinge portion 32 is hinged to the piston 20, and the hinge portion 32 has a grinding surface facing the piston 20, the grinding surface being provided with a DLC coating.

[0037] This pump assembly can be applied to a compressor. The piston 20 is eccentrically rotatable within the working chamber and connected to the eccentric portion of the compressor's crankshaft. When the compressor operates, the crankshaft is driven to rotate by a motor, which in turn drives the piston 20 to rotate eccentrically within the working chamber of the cylinder 10 via the eccentric portion of the crankshaft. As the piston 20 rotates eccentrically, it drives the sliding vane 30 to move along a sliding groove. The sliding vane 30 and the piston 20 divide the working chamber into an intake chamber and a compression chamber. The intake chamber has an intake port, and the compression chamber has an exhaust port. As the piston 20 rotates, the volumes of the exhaust chamber and the intake chamber change, thereby realizing the intake, compression, and exhaust processes to compress the working medium.

[0038] The slider body 31 and hinge portion 32 of the slider 30 can be integrally formed or separately formed and then assembled. Optionally, the slider body 31 and hinge portion 32 can be integrally formed, which simplifies the manufacturing process and increases the overall structural strength. The slider body 31 and hinge portion 32 can be made of the same or different materials. Optionally, both the slider body 31 and hinge portion 32 can be made of metal, such as stainless steel (e.g., 11Cr17 stainless steel) or high-speed steel (e.g., M2 high-speed steel).

[0039] There are several ways in which the hinge portion 32 is hinged to the piston 20. For example, in one embodiment, the outer peripheral wall of the piston 20 is provided with a hinge groove, and the hinge portion 32 is hinged within the hinge groove. Optionally, the hinge groove is an arc-shaped groove with a notch, and the outer peripheral contour of the hinge portion 32 is adapted to the inner peripheral surface contour of the hinge groove. As another example, in another embodiment, the outer peripheral wall of the piston 20 is provided with a protrusion, and the hinge portion 32 is provided with a hinge groove, with the protrusion hinged within the hinge groove. Optionally, the hinge groove is an arc-shaped groove with a notch, and the outer peripheral contour of the protrusion is adapted to the inner peripheral surface contour of the hinge groove.

[0040] To reduce wear on the grinding surface of the slider 30, a DLC coating is applied to the grinding surface. Alternatively, a DLC coating can be applied to other easily worn surfaces of the slider 30, or to all surfaces of the slider 30. The DLC coating (Diamond-Like Carbon Coating) is an amorphous functional coating composed of carbon atoms, combining the high hardness of diamond with the lubricity of graphite. The DLC coating can be applied to the grinding surface using surface treatment processes such as physical vapor deposition (PVD), plasma-enhanced chemical vapor deposition (PECVD), ion beam-assisted deposition (IBAD), cathodic arc deposition (CAD), and pulsed laser deposition (PLD). By applying a DLC coating to the grinding surface of the slider 30, the grinding surface of the slider 30 exhibits superior wear resistance and lubricity.

[0041] The technical solution of this utility model adopts a hinged pump body assembly, in which the vane 30 is hinged to the piston 20 via the hinge part 32. This increases the connection rigidity between the vane 30 and the piston 20, effectively reducing gas leakage during gas compression, improving the sound of the vane 30, and enhancing the energy efficiency and reliability of the compressor. Furthermore, by applying a DLC coating to the mating surface of the vane 30, the mating surface of the vane 30 has better wear resistance and lubricity, which can improve the situation of accelerated wear of the hinge part 32, thereby reducing the wear of the vane 30 and extending the service life of the vane 30 and the compressor.

[0042] The DLC coating thickness should not be too thin or too thick. If the DLC coating is too thin, the improvement in wear resistance will be limited; if the DLC coating is too thick, it will lead to increased internal stress and decreased adhesion to the substrate. To balance wear resistance and adhesion, in one embodiment, the thickness of the DLC coating is not less than 2 micrometers and not more than 6 micrometers. That is, the thickness of the DLC coating is between 2 micrometers and 6 micrometers. For example, the thickness of the DLC coating can be 2 micrometers, 3 micrometers, 4 micrometers, 5 micrometers, 6 micrometers, etc.

[0043] To further improve the wear resistance of the sliding plate 30, in one embodiment, the hardness of the DLC coating is not less than 1600 Hv. That is, the hardness of the DLC coating is ≥1600 Hv. For example, the hardness of the DLC coating can be 1600 Hv, 1700 Hv, 1800 Hv, 1900 Hv, 2000 Hv, etc.

[0044] In one embodiment, the surface roughness Rz of the DLC coating is no greater than 1.6 micrometers. That is, the surface roughness Rz of the DLC coating is ≤ 1.6 μm. This increases the actual contact area between the DLC coating of the slide vane 30 and the piston 20, reduces local stress concentration, thereby lowering the coefficient of friction, reducing wear between the DLC coating and the piston 20, and further extending the service life of the compressor. For example, the surface roughness Rz of the DLC coating can be 1 micrometer, 1.2 micrometers, 1.4 micrometers, 1.6 micrometers, etc.

[0045] In one embodiment, the hinge portion 32 forms a coating substrate at the bottom of the DLC coating, and the coating substrate is made of stainless steel or high-speed steel. In this embodiment, using stainless steel or high-speed steel as the coating substrate for DLC coating adhesion gives the coating substrate high hardness, which is beneficial for improving the adhesion between the DLC coating and the coating substrate, making the DLC coating less prone to peeling, and improving wear resistance. For ease of processing, the hinge portion 32 may optionally be made entirely of stainless steel or high-speed steel. Alternatively, only the portion of the hinge portion 32 for DLC coating adhesion may be made of stainless steel or high-speed steel. Furthermore, in practical applications, the slider body 31 and the hinge portion 32 may optionally be integrally formed. Alternatively, the slider 30 may optionally be made entirely of stainless steel or high-speed steel.

[0046] Optionally, the coating substrate is made of 11Cr17 stainless steel or M2 high-speed steel. 11Cr17 stainless steel is a high-hardness martensitic stainless steel with high hardness, good corrosion resistance, and excellent processing performance. M2 high-speed steel is a molybdenum-based high-speed steel with high hardness and wear resistance.

[0047] In one embodiment, the hinge portion 32 forms a coating substrate at the bottom of the DLC coating, and the surface hardness of the coating substrate is not less than 450 Hv. This gives the coating substrate a high hardness, which is beneficial for improving the adhesion between the DLC coating and the coating substrate, making the DLC coating less prone to peeling, and improving wear resistance. For example, the surface hardness of the coating substrate can be 450 Hv, 500 Hv, 550 Hv, 600 Hv, 650 Hv, etc.

[0048] In one embodiment, the length of the slide 30 along the radial direction of the piston 20 is L, and the height of the slide 30 along the axial direction of the piston 20 is H, satisfying that the ratio of L to H is not less than 1 and not greater than 1.5. That is, 1 ≤ L / H ≤ 1.5. This ensures that the length-to-height ratio of the slide 30 is appropriate, enabling the slide 30 to withstand higher radial loads, making the movement of the slide 30 more stable, and improving gas leakage between the slide 30 and the grinding element.

[0049] Optionally, the connection between the hinge portion 32 and the slider body 31 is provided with a groove on at least one side of the slider 30 in the thickness direction. In this embodiment, by providing a groove, a clearance can be formed on the side of the slider 30, avoiding interference between the connection between the hinge portion 32 and the slider body 31 and the edge of the hinge groove when the slider 30 moves, making the movement of the slider 30 smoother and further reducing wear.

[0050] This utility model also proposes a compressor, including a crankshaft, a pump body assembly, and a motor. The pump body assembly includes a cylinder 10, a piston 20, and a vane 30; the cylinder 10 has a working chamber and a groove communicating with the working chamber; the piston 20 is rotatably disposed in the working chamber and sleeved around the crankshaft; the vane body 31 of the vane 30 is slidably disposed in the groove; the hinge portion 32 of the vane 30 is hinged to the piston 20; the hinge portion 32 has a grinding surface facing the piston 20, and the grinding surface is coated with DLC. The motor is driven by the crankshaft and is used to drive the crankshaft to rotate, thereby causing the piston 20 to rotate eccentrically within the working chamber.

[0051] When the compressor is working, the crankshaft is driven to rotate by the motor, and the eccentric part of the crankshaft drives the piston 20 to rotate eccentrically in the working chamber of the cylinder 10. As the piston 20 rotates eccentrically, the sliding vane 30 can move along the sliding groove. The sliding vane 30 and the piston 20 can divide the working chamber into an intake chamber and a compression chamber. The intake chamber has an intake port and the compression chamber has an exhaust port. As the piston 20 rotates, the volume of the exhaust chamber and the intake chamber changes, thereby realizing the intake, compression and exhaust process, and realizing the compression of the working medium.

[0052] The technical solution of this utility model employs a compressor with a hinged structure, in which the sliding vane 30 is hinged to the piston 20 via the hinge part 32. This increases the connection rigidity between the sliding vane 30 and the piston 20, effectively reducing gas leakage during gas compression, improving the sound of the sliding vane 30, and enhancing the energy efficiency and reliability of the compressor. Furthermore, by applying a DLC coating to the mating surface of the sliding vane 30, the mating surface of the sliding vane 30 has superior wear resistance and lubricity, which can mitigate the accelerated wear of the hinge part 32, thereby extending the service life of the sliding vane 30 and the compressor.

[0053] The specific structure of the pump assembly is as described in the above embodiments. Since this compressor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here. The compressor can be a vertical compressor or a horizontal compressor. The compressor includes, but is not limited to, a single-cylinder rotary compressor with a single cylinder, or a multi-cylinder rotary compressor with multiple cylinders.

[0054] This utility model also proposes a refrigeration device, including a compressor. The compressor includes a cylinder 10, a piston 20, and a vane 30. The cylinder 10 has a working chamber and a groove communicating with the working chamber. The piston 20 is rotatably disposed within the working chamber. The vane 30 includes a vane body 31 and a hinge portion 32 disposed at one end of the vane body 31. The vane body 31 is slidably disposed within the groove, and the hinge portion 32 is hinged to the piston 20. The hinge portion 32 has a grinding surface facing the piston 20, and the grinding surface is coated with a DLC coating. The specific structure of the pump assembly is described in the above embodiments. Since this refrigeration device adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here. The refrigeration device includes, but is not limited to, refrigerators, integrated air conditioners, split air conditioners, ducted air conditioners, window air conditioners, etc.

[0055] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A pump body assembly, characterized in that, include: The cylinder has a working chamber and a sliding groove communicating with the working chamber; The piston is eccentrically rotatable within the working chamber; as well as A sliding plate includes a sliding plate body and a hinge portion disposed at one end of the sliding plate body. The sliding plate body is slidably disposed in the sliding groove. The hinge portion is hinged to the piston. The hinge portion has a grinding surface facing the piston. The grinding surface is provided with a DLC coating.

2. The pump body assembly as claimed in claim 1, characterized in that, The thickness of the DLC coating is not less than 2 micrometers and not more than 6 micrometers; And / or, the hardness of the DLC coating is not less than 1600 Hv; And / or, the surface roughness Rz of the DLC coating is not greater than 1.6 micrometers.

3. The pump body assembly as claimed in claim 1, characterized in that, The hinge portion forms a coating substrate at the bottom of the DLC coating, and the coating substrate is made of stainless steel or high-speed steel.

4. The pump body assembly as claimed in claim 3, characterized in that, The coating substrate is made of 11Cr17 stainless steel or M2 high-speed steel.

5. The pump body assembly as claimed in claim 1, characterized in that, The hinge portion forms a coating substrate at the bottom of the DLC coating, and the surface hardness of the coating substrate is not less than 450Hv.

6. The pump body assembly as claimed in claim 1, characterized in that, The length of the slider along the radial direction of the piston is L, and the height of the slider along the axial direction of the piston is H, satisfying that the ratio of L to H is not less than 1 and not greater than 1.

5.

7. The pump body assembly as claimed in claim 1, characterized in that, The connection between the hinge and the slide body is provided with a groove on at least one side of the slide thickness direction.

8. The pump body assembly as claimed in any one of claims 1 to 7, characterized in that, The piston has a hinge groove on its outer peripheral wall, and the hinge part is hinged in the hinge groove; Alternatively, the outer peripheral wall of the piston is provided with a protrusion, the hinge part is provided with a hinge groove, and the protrusion is hinged in the hinge groove.

9. A compressor, characterized in that, include: Crankshaft; The pump body assembly as described in any one of claims 1 to 8, wherein the piston is sleeved around the crankshaft; as well as An electric motor is connected to the crankshaft drive and is used to drive the crankshaft to rotate, thereby causing the piston to rotate eccentrically within the working chamber.

10. A refrigeration device, characterized in that, Includes the compressor as described in claim 9.

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