Main bearing seat for scroll compressor

Abstract

According to the main bearing seat for the scroll compressor provided by the utility model, the contact surface of the main bearing seat of the scroll compressor is subjected to laser morphology regulation and control in a partitioned manner, and the contact surface is subjected to surface texturing treatment by using laser, so that local surface modification is realized without influencing the overall performance of equipment; the micro pits are machined on the thrust surface of the main bearing seat of the scroll compressor, so that the lubricating state of the thrust surface is changed, the friction coefficient is reduced, the wear rate is reduced, meanwhile, micro abrasive dust generated in the working process of a scroll assembly can be discharged, further damage of the abrasive dust to the thrust surface is reduced, the working performance of the thrust surface is effectively improved, and the service life of the scroll compressor is prolonged. The overall operation life of the equipment is prolonged; the micro-convex bodies are arranged in the contact area at the bottom end of the locking sleeve of the scroll compressor, so that the pressure of the contact surface is enhanced, stronger locking force is provided for the locking sleeve, and the long-term stability of the locking device is kept, thereby ensuring the stable operation of the scroll compressor.

Description

Technical Field

[0001] This utility model relates to the field of machining, and in particular to a main bearing housing for a scroll compressor. Background Technology

[0002] Scroll compressors are widely used in various fields due to their simple structure, high efficiency, and low noise. During operation, the core component of a scroll compressor is the main bearing. Therefore, the contact surfaces of the scroll compressor mainly include the thrust surface on the main bearing thrust plate and the bottom contact area of ​​the locking sleeve. During operation, the thrust surface contacts the bottom face of the scroll assembly, playing a crucial role in operation and support. This results in intense friction between the thrust surface and the scroll assembly, and the generated debris cannot be discharged, easily forming numerous scratches on the thrust surface, causing severe wear and directly affecting the overall performance of the machine. Furthermore, the area where the main bearing housing face contacts the bottom of the locking sleeve experiences fretting under prolonged locking pressure, causing varying depths of damage marks in the contact area. This can lead to loosening of the parts, accelerating the initiation and propagation of fatigue cracks, thus reducing the fatigue life of the parts. If left uncontrolled, this can cause the locking sleeve to loosen, affecting the stable operation of the entire machine.

[0003] Therefore, there is an urgent need in the market for a main bearing housing for scroll compressors that can provide differentiated performance requirements based on the different contact surfaces of the scroll compressor during actual operation. This would meet the performance requirements of different components of the scroll compressor during operation, thereby improving the reliability of each component, reducing maintenance costs, enhancing equipment performance, and extending equipment lifespan. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a main bearing housing for a scroll compressor. By setting a friction-reducing zone on the thrust surface of the main bearing housing and a friction-increasing zone on the bottom contact area of ​​the locking sleeve, different contact end faces are provided according to the differentiated performance requirements of different components, thereby achieving the overall effective operation of the equipment.

[0005] This utility model achieves the above-mentioned technical objectives through the following technical means.

[0006] A main bearing housing for a scroll compressor, the main bearing housing having a thrust surface, the main bearing housing being mounted on the fixed end of the scroll compressor via a locking sleeve, the thrust surface having a friction-reducing area, and the bottom contact area of ​​the locking sleeve having a friction-increasing area; the friction-reducing area having micro-dimples to reduce interfacial friction; and the friction-increasing area having micro-protrusions to increase interfacial friction.

[0007] Furthermore, the micro-dimples in the friction-reducing region include a first dimple and a second dimple. The first dimples are evenly distributed along the circumference and radial direction of the thrust surface. A second dimple is provided between adjacent first dimples in the same pitch circle, and the diameter of the second dimple is smaller than the diameter of the first dimple.

[0008] Furthermore, the diameter D of the first pit big The diameter of the second pit is 300–400 μm, and the depth h is 25–30 μm; small The size is 80–100 μm, and the depth is 8–10 μm.

[0009] Furthermore, the outermost ring of the first recess is tangent to the thrust surface contour, and the center of each ring of the second recess is on the same circle as the center of the first recess.

[0010] Furthermore, the micro-protrusions in the friction-enhancing region are distributed in a rectangular array.

[0011] Furthermore, the micro-protrusion is a crater-shaped micro-protrusion, wherein the diameter D1 of the crater-shaped micro-protrusion is 100-120 μm, the depth h1 is 10-12 μm, and the height H1 is 8-10 μm.

[0012] Furthermore, the micro-protrusion is a spherical crown-shaped micro-protrusion with a diameter D2 of 300–310 μm and a protrusion height H2 of 25–30 μm.

[0013] Furthermore, the micro-protrusion is a concave-top spherical crown-shaped micro-protrusion, wherein the diameter D3 of the concave-top spherical crown-shaped micro-protrusion is 330-350 μm, the depth h3 is 5-8 μm, and the protrusion height H3 is 30-35 μm.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. The main bearing housing for a scroll compressor described in this utility model changes the lubrication state of the thrust surface by setting micro-pits on the thrust surface of the main bearing housing of the scroll compressor, thereby reducing the friction coefficient and wear rate. At the same time, it can discharge the tiny wear debris generated by the scroll assembly during operation, reducing further damage to the thrust surface by the wear debris, effectively improving the working performance of the thrust surface and the compressor, and extending the overall service life of the equipment.

[0016] 2. The main bearing housing for a scroll compressor described in this utility model enhances the friction of the contact surface by setting micro-protrusions in the contact area between the locking sleeve and the bottom end of the main bearing housing, providing a stronger locking force to the locking sleeve. This ensures that the locking device maintains a stable clamping state under various operating conditions, reducing micro-movements during compressor operation. The micro-protrusions also improve the wear resistance of the locking sleeve. During repeated locking and releasing, the contact between the micro-protrusions reduces wear on the surface material, maintaining the long-term stability of the locking device, thereby ensuring the stable operation of the scroll compressor. Attached Figure Description

[0017] 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. The drawings described below are some embodiments of this utility model. For those skilled in the art, it is obvious that other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the thrust surface of the main bearing housing of this utility model.

[0019] Figure 2 This is a schematic diagram of the installation of the main bearing housing and locking sleeve of this utility model.

[0020] Figure 3 This is a schematic diagram showing the distribution of the first and second recesses on the thrust surface of this utility model.

[0021] Figure 4 This is a schematic diagram of the contact area at the bottom end of the locking sleeve of this utility model.

[0022] Figure 5 This is a schematic diagram showing the distribution of the micro-protrusions in the contact area at the bottom end of the locking sleeve.

[0023] Figure 6 This is a schematic diagram of the crater-like fibrous morphology in this utility model.

[0024] Figure 7 This is a schematic diagram of the crown-shaped hairy morphology in this utility model.

[0025] Figure 8 This is a schematic diagram of the concave-topped spherical crown-shaped hairy morphology of the present invention.

[0026] In the picture:

[0027] 1-Thrust surface; 2-Locking sleeve; 3-First recess; 4-Second recess; 5-Locking sleeve bottom contact area; 6-Micro protrusion. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] like Figures 1-3 As shown, the main bearing housing for the scroll compressor of this utility model is provided with a thrust surface 1, and the thrust surface 1 is provided with a friction-reducing area. The friction-reducing area is provided with micro-pits to reduce interface friction. The friction-reducing area is provided with composite multi-scale micro-pits, which include a first pit 3 and a second pit 4, to improve the lubrication performance of the thrust surface 1, reduce friction, reduce scratches on the workpiece surface by fine abrasives, and extend service life.

[0032] The micro-dimples are uniformly distributed along the circumference of the thrust surface 1. The micro-dimples are all processed by a picosecond laser. The laser is set with a processing power of 55W, a frequency of 0.5MHz, and a scanning speed of 500mm / min. During the processing, nitrogen gas with a flow rate of 10L / min can be blown into the processing area using a nozzle.

[0033] The number of each ring of the first pit 3 is N = 90, and the position of the first pit is... n≤90 and n is a positive integer. The circumferential span of each first recess 3 is 4°. The outermost ring of first recesses 3 is tangent to the contour of the thrust surface 1. The first recesses 3 in each ring are evenly distributed radially with a radial spacing of 800μm. There are a total of 74 rings in the array. The diameter D of the first recess 3 is... big The depth is 300–400 μm, and the depth is h. big It is 25–30 μm.

[0034] The second pit 4 has N = 90 per ring, and the pit positions are... n≤90 and n is a positive integer. The circumferential span of each second pit 4 is 4°. The center of each ring of second pits 4 is on the same circumference as the center of the first pit 3. The second pits 4 are evenly distributed radially in each ring, with a spacing of 800μm. There are a total of 74 rings. The diameter D of the second pit 4 is... small The depth is 80–100 μm, and the depth is h. small It is 8–10 μm.

[0035] like Figures 5-8 As shown, the main bearing housing is installed on the fixed end of the scroll compressor via a locking sleeve 2. The bottom contact area 5 of the locking sleeve is provided with a friction-enhancing area, and the friction-enhancing area is provided with micro-protrusions 6 to enhance the friction of the contact surface, reduce micro-movements during compressor operation, and thus ensure the stable operation of the scroll compressor.

[0036] Based on the LT-500 laser texturing system, the processing area of ​​the bottom contact area 5 of the locking sleeve is a rectangular annular surface outside a U-shaped area, and the processing area S = L 2 -R 2 The spacing d between each micro-protrusion t The diameter is 600 μm. During the processing, the nozzle blows nitrogen gas at a flow rate of 10 L / min onto the workpiece.

[0037] When the micro-protrusion 6 is a crater-shaped micro-protrusion, the laser power of the processing system is set to 250W, the pulse width to 3000μm, and the number of reciprocating scans to 15 times, to obtain a crater-shaped micro-protrusion with a diameter D1 of 100-120μm, a depth h1 of 10-12μm, and a protrusion height H1 of 8-10μm.

[0038] When the micro-protrusion 6 is a spherical crown-shaped micro-protrusion, the laser processing power is set to 300W, the pulse width to 1500μs, and the number of reciprocating scans to 15. The resulting spherical crown-shaped micro-protrusion has a diameter D2 of 300-310μm and a protrusion height H2 of 25-30μm.

[0039] When the micro-protrusion 6 is a concave-top spherical crown-shaped micro-protrusion, the laser processing power is set to 350W, the pulse width is 1500μs, and the number of reciprocating scans is 15 times to obtain a concave-top spherical crown-shaped micro-protrusion with a diameter D3 of 330-350μm, a depth h3 of 5-8μm, and a protrusion height H3 of 30-35μm.

[0040] After all the above components are processed, the processed workpieces are placed in an ultrasonic cleaner for 20 minutes to remove surface oil stains, dried and stored for later use.

[0041] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0042] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. All equivalent embodiments or modifications made without departing from the spirit of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A main bearing housing for a scroll compressor, the main bearing housing having a thrust surface (1), the main bearing housing being mounted on the fixed end of the scroll compressor via a locking sleeve (2), characterized in that, The thrust surface (1) is provided with a friction-reducing area, and the bottom contact area (5) of the locking sleeve is provided with a friction-increasing area; the friction-reducing area is provided with micro-pits to reduce interface friction; the friction-increasing area is provided with micro-protrusions (6) to increase interface friction.

2. The main bearing housing for a scroll compressor according to claim 1, characterized in that, The micro-dimples in the friction reduction area include a first dimple (3) and a second dimple (4). The first dimple (3) is evenly distributed along the circumference and radial direction of the thrust surface (1). A second dimple (4) is provided between adjacent first dimples (3) in the same pitch circle, and the diameter of the second dimple (4) is smaller than the diameter of the first dimple (3).

3. The main bearing housing for a scroll compressor according to claim 2, characterized in that, The diameter D of the first pit (3) big The diameter of the second pit (4) is 300-400 μm, and the depth h is 25-30 μm; small The size is 80–100 μm, and the depth is 8–10 μm.

4. The main bearing housing for a scroll compressor according to claim 2, characterized in that, The first pit (3) located on the outermost circumferential distribution of the thrust surface (1) is tangent to the outline of the thrust surface (1).

5. The main bearing housing for a scroll compressor according to claim 1, characterized in that, The micro-protrusions (6) in the friction-enhancing region are distributed in a rectangular array.

6. The main bearing housing for a scroll compressor according to claim 5, characterized in that, The micro-protrusion (6) is a crater-shaped micro-protrusion with a diameter D1 of 100-120 μm, a depth h1 of 10-12 μm, and a height H1 of 8-10 μm.

7. The main bearing housing for a scroll compressor according to claim 5, characterized in that, The micro-protrusion (6) is a spherical crown-shaped micro-protrusion with a diameter D2 of 300-310 μm and a protrusion height H2 of 25-30 μm.

8. The main bearing housing for a scroll compressor according to claim 5, characterized in that, The micro-protrusion (6) is a concave-top spherical crown-shaped micro-protrusion with a diameter D3 of 330-350 μm, a depth h3 of 5-8 μm, and a protrusion height H3 of 30-35 μm.

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