Silencing cover assembly of horizontal rolling rotor compressor

Abstract

The utility model provides a noise reduction cover assembly of a horizontal rolling rotor compressor, which solves the problems that the noise reduction cover and an upper oil pipe structure of the existing horizontal rolling rotor compressor are large in oil supply resistance, easy to rust and high in product cost. According to the technical scheme, the noise reduction cover assembly of the horizontal rolling rotor compressor comprises a noise reduction cover, a boss is arranged at the top of the noise reduction cover, an upper oil pipe with a bent part is welded to a central butt joint hole of the noise reduction cover, and a mounting hole is correspondingly formed in the position, close to the outer edge, of the noise reduction cover through a secondary table lower than the boss. The technical key points are as follows: the oil feeding pipe is a steel oil feeding pipe which is welded and fixed through silver-free solder, the wall thickness of the oil feeding pipe is 0.4-0.7 mm, and the bending part is an arc / approximate arc with a bending angle of 75 degrees. The structure of a product is optimized, the lubricating property of the horizontal rolling rotor compressor is improved, the machining cost is reduced, and the service life of the product is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a muffler cover assembly of a horizontal rolling rotor compressor, which is suitable for lubricating and supplying oil to the horizontal rolling rotor compressor. Background Art

[0002] At present, during the use of a horizontal rolling rotor compressor, the crankshaft direction of the pump body is horizontal. In order to facilitate oil supply and keep the pump body lubricated, the lower silencer cover of the pump body needs to be installed with an elbow-shaped upper oil pipe; the upper oil pipe inlet needs to extend below the oil level inside the compressor cavity, and the outlet is inserted into the center of the silencer cover. The silencer cover is fixed to the lower bearing of the pump body by bolt connection. The oil enters the pump body (low-pressure side) through the pressure difference from the compressor cavity (high-pressure side) along the upper oil pipe, and the rotating parts of the compressor pump body are lubricated to ensure the performance of the compressor. For example, the patent document with announcement number CN208738350U discloses a horizontal compressor, in which the upper oil pipe outlet section is inserted into the docking hole of the lower silencer cover (or oil suction cover) and fixedly connected to the lower silencer cover. The original upper oil pipe is usually made of copper with a wall thickness of 0.8mm. Due to the limitations of existing process conditions, the elbow corners are obviously deformed, the oil supply resistance is large, and the product cost is high. At present, the welding and fixing of the silencer cover and the upper oil pipe adopt high-frequency welding as furnace brazing, using silver welding rings and silver solder high-frequency welding technology. After welding, it needs to be cleaned. The silencer cover is very easy to rust after cleaning, and manpower needs to be invested again to remove rust before use. Summary of the invention

[0003] The purpose of the utility model is to provide a horizontal rolling rotor compressor silencer cover assembly, which solves the problems of large oil supply resistance, easy rust and high product cost of the silencer cover and upper oil pipe structure of the existing horizontal rolling rotor compressor. It optimizes the product structure, improves the lubrication characteristics of the horizontal rolling rotor compressor, reduces processing costs and increases product service life.

[0004] The technical solution adopted by the utility model is: the silencer cover assembly of the horizontal rolling rotor compressor comprises a silencer cover, a boss is arranged on the top of the silencer cover, an upper oil pipe with a curved portion is welded to the central docking hole of the silencer cover, and a mounting hole is arranged correspondingly near the outer edge of the silencer cover through a secondary platform lower than the boss. The technical key points are: the upper oil pipe is a steel upper oil pipe fixed by welding with silver-free solder, the wall thickness of the upper oil pipe is 0.4-0.7mm, and the curved portion is a circular arc / approximately circular arc with a bending angle of 75 degrees.

[0005] The angle between the center line of the upper oil pipe in the installation position and the horizontal plane is 146±2 degrees.

[0006] The overall height of the silencer cover after being fixed to the oil pipe is 36.4 cm.

[0007] The total height of the silencer cover is 20.65 cm, and the height of the secondary platform is 13.5 cm.

[0008] The straight length of the inlet section of the upper oil pipe is 30.5 cm.

[0009] The edge of the docking hole of the muffler cover is provided with a positioning groove with an arc-shaped bottom, and the upper oil pipe outlet section is provided with a positioning protrusion corresponding to the positioning groove.

[0010] The inner side surface of the noise reduction cover is provided with a raised noise reduction surface layer in the shape of a honeycomb grid.

[0011] The utility model has the following advantages and positive effects: since the utility model adopts a steel oil pipe fixed by welding with silver-free solder, and the wall thickness of the oil pipe is 0.4-0.7mm, and the bending part is a circular arc / similar to a circular arc with a bending angle of 75 degrees, the product structure is optimized, the copper pipe is replaced by a steel pipe, the silver solder is replaced by silver-free solder, and silver solder paste is not needed, so there is no need to clean it again; the deformation profile of the bending part is similar to a circle, the deformation of the bending part is reduced, the flow resistance is reduced, the oil inlet resistance is reduced, the lubrication characteristics of the rolling rotor compressor are improved, the processing and production costs are reduced, and the service life of the product is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings.

[0013] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the utility model;

[0014] Figure 2 yes Figure 1 AOA section view;

[0015] Figure 3 This is a schematic diagram of the upper oil pipe structure of an embodiment of the utility model;

[0016] Figure 4 This is a schematic diagram of the exploded structure of the second embodiment of the utility model;

[0017] Figure 5 yes Figure 4 Schematic diagram of the local structure of the B-direction installation state;

[0018] Figure 6 It is a longitudinal cross-sectional view of the muffler cover of the third embodiment of the utility model;

[0019] Figure 7 It is a schematic diagram of the inner surface structure of the silencer cover of the third embodiment of the utility model.

[0020] Explanation of the serial numbers in the figure: 1 silencer cover, 2 upper oil pipe, 21 inlet section, 22 outlet section, 23 bent portion, 3 center docking hole, 4 boss, 5 secondary platform, 6 mounting hole, 7 positioning protrusion, 8 positioning groove, 9 silencer surface layer. DETAILED DESCRIPTION

[0021] according to Figures 1 to 7 The specific structure of the utility model is described in detail, as shown in Example 1. Figures 1 to 3 As shown, a muffler cover assembly of a horizontal rolling rotor compressor, as a lower muffler cover of a compressor pump body, is composed of a muffler cover 1 and an upper oil pipe 2 fixedly connected, wherein a boss 4 is arranged on the top of the muffler cover to form a circular cover, and a central docking hole 3 is arranged at the center of the muffler cover for connecting the upper oil pipe 2; three groups of secondary platforms 5 lower than the boss 4 are arranged near the outer edge of the muffler cover 1, and each secondary platform is correspondingly provided with a mounting hole 6 for fixing with the compressor pump body. The upper oil pipe 2 adopts an integrated steel curved pipe with a wall thickness of 0.4-0.7mm, including a longer inlet section 21 straight pipe and a shorter outlet section 22, and a curved portion 23 is arranged between the inlet section and the outlet section, and the curved portion is a circular arc / approximate circular arc with a bending angle b=75 degrees. As the wall thickness of the upper oil pipe is reduced by 50%-10%, the deformation of the bending part is reduced, the flux is increased by 10%, and the flow resistance is reduced by 15%; due to the influence of process conditions, the deformation profile of the bending part is approximately circular, the thickness of the upper oil pipe of the lower silencer cover of the horizontal rolling rotor compressor is reduced, the internal passage is increased, the bending deformation is reduced, and the bending surface is approximately circular, which reduces the processing cost, reduces the resistance to oil flow, improves the lubrication characteristics of the compressor, and increases the service life of the compressor. The oil outlet port of the upper oil pipe is vertically inserted into the central docking hole of the silencer cover, and the oil outlet port is fixed by silver-free solder welding at the connection, using steel pipes instead of copper pipes, and silver-free solder instead of silver solder. No silver solder paste is used, and no cleaning is required.

[0022] As a further improvement, Figure 1 As shown, the angle between the center line of the upper oil pipe 2 at the installation position and the horizontal plane can be a = 146 ± 2 degrees, so that the component can be installed at a lower level; Figure 2 As shown, the overall height c=36.4cm after the silencer cover 1 is fixed on the oil pipe; the total height d=20.65cm of the silencer cover, the height e=13.5cm from the secondary platform to the convex platform surface; Figure 3 As shown, the straight pipe length of the inlet section of the upper oil pipe is f=30.5 cm. By setting the shape and wall thickness of the silencer cover and the upper oil pipe, the vibration characteristics of the fluid can be affected. Since random noise and vibration are generated during the operation of the compressor, the structure of the silencer cover is different. By testing the shape of the silencer cover, the silencer cover assembly of the horizontal rolling rotor compressor can achieve the best silencing effect and reduce flow resistance.

[0023] Embodiment 2, as Figure 4 and 5As shown, it is a further improvement of the silencer cover assembly of the horizontal rolling rotor compressor of the first embodiment, and its overall structure remains unchanged. The improvement is that a positioning groove 8 with an arc bottom is provided at the edge of the docking hole of the silencer cover 1, and a positioning convex block 7 matching the positioning groove is provided at the upper oil pipe outlet section 22. The positioning convex block 7 can be inserted into the positioning groove 8 to quickly locate the upper oil pipe and the silencer cover when they are assembled, ensuring that the angle a=146 degrees between the center line of the upper oil pipe and the horizontal plane is installed.

[0024] Embodiment three, as Figure 6 and 7 As shown, it is a further improvement of the silencer cover assembly of the horizontal rolling rotor compressor of the first embodiment, and its overall structure remains unchanged. The improvement is that a honeycomb grid-shaped raised silencer surface layer 9 is provided on the inner side of the silencer cover 1. The honeycomb grid-shaped raised silencer surface layer can be used to reduce the vibration noise of the compressor and increase the vibration reduction and noise reduction effect of the silencer cover.

[0025] In summary, the purpose of the utility model is achieved.

Claims

1. A muffler cover assembly for a horizontal rolling rotor compressor, comprising a muffler cover, a boss is arranged on the top of the muffler cover, an upper oil pipe with a curved portion is welded to the central butt hole of the muffler cover, and a mounting hole is arranged correspondingly near the outer edge of the muffler cover through a secondary platform lower than the boss, characterized in that: The upper oil pipe is a steel upper oil pipe fixed by welding with silver-free solder, the wall thickness of the upper oil pipe is 0.4-0.7 mm, and the bending part is an arc / similar to an arc with a bending angle of 75 degrees.

2. The muffler cover assembly of the horizontal rolling rotor compressor according to claim 1, characterized in that: The angle between the center line of the upper oil pipe in the installation position and the horizontal plane is 146±2 degrees.

3. The muffler cover assembly of the horizontal rolling rotor compressor according to claim 1, characterized in that: The overall height of the silencer cover after being fixed to the oil pipe is 36.4 cm.

4. The muffler cover assembly of a horizontal rolling rotor compressor according to claim 1, characterized in that: The total height of the silencer cover is 20.65 cm, and the height between the secondary platform and the convex platform surface is 13.5 cm.

5. The muffler cover assembly of the horizontal rolling rotor compressor according to claim 1, characterized in that: The straight length of the inlet section of the upper oil pipe is 30.5 cm.

6. The muffler cover assembly of a horizontal rolling rotor compressor according to claim 2, characterized in that: The overall height of the silencer cover after fixing the upper oil pipe is 36.4 cm; the total height of the silencer cover is 20.65 cm, and the height of the secondary platform from the convex platform surface is 13.5 cm; the straight pipe length of the inlet section of the upper oil pipe is 30.5 cm.

7. The muffler cover assembly of a horizontal rolling rotor compressor according to claim 1, characterized in that: The edge of the docking hole of the muffler cover is provided with a positioning groove with an arc-shaped bottom, and the upper oil pipe outlet section is provided with a positioning convex block matching and corresponding to the positioning groove.

8. The muffler cover assembly of a horizontal rolling rotor compressor according to claim 1, characterized in that: The inner side surface of the noise reduction cover is provided with a raised noise reduction surface layer in the shape of a honeycomb grid.

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