A compressor crankcase directional lubrication system

Abstract

The utility model discloses a kind of compressor crankcase directional lubrication systems, including crankcase body, crankshaft, linkage assembly, slide rail and rotary two-stage distributor;The linkage assembly includes connecting rod body and cross head body, the contact surface of the cross head body and slide rail is covered honeycomb microporous lubricating layer;The rotary two-stage distributor is installed at the oil inlet of crankcase body, including primary helical flow guide rotor and secondary pressure distribution valve, the output end of the primary helical flow guide rotor is communicated secondary pressure distribution valve's inlet chamber, two outlets of the secondary pressure distribution valve are communicated respectively the oil inlet channel of the both ends of crankshaft.The utility model realizes that the oil inlet pressure difference of the both ends of crankshaft is stabilized within 5%, pair contact surface oil film full coverage, closed loop oil circuit recovery rate is promoted to more than 85%, significantly reduce energy consumption and maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of positive displacement compressor lubrication technology, and in particular to a directional lubrication system for a compressor crankcase. Background Technology

[0002] A positive displacement compressor relies on a motor to sequentially drive the crankshaft, connecting rod, crosshead, and piston rod in the crankcase. The piston rod then pushes the diaphragm in the diaphragm head, thereby compressing the gas. During this process, the moving parts located in the crankcase require adequate lubrication.

[0003] However, the existing compressor crankcase lubrication system has the following defects: parallel oil circuits cause the oil pressure in the remote oil passages to drop by more than 40%, resulting in insufficient bearing lubrication, dry friction, and easy wear; the contact surface between the crosshead and the slide rail is severely worn in some areas; and the lubricating oil recovery rate is low. Utility Model Content

[0004] This invention provides a directional lubrication system for a compressor crankcase. Through the design of a closed-loop oil circuit and a dynamic pressure stabilizing structure, it can solve the problems of oil pressure decay and uneven lubrication in the prior art.

[0005] To solve the above-mentioned technical problems, this utility model provides a compressor crankcase directional lubrication system, including: crankcase body, crankshaft, linkage assembly, slide rail and rotary two-stage distributor;

[0006] The crankshaft is installed in the middle of the crankcase body; the slide rail is installed in the crankcase body and located below the linkage assembly;

[0007] The linkage component includes a connecting rod body and a crosshead body. The crosshead body contacts the slide rail, and the contact surface is covered with a honeycomb microporous lubricating layer.

[0008] The rotary two-stage distributor is installed at the oil inlet of the crankcase body and includes a first-stage spiral guide rotor and a second-stage pressure distribution valve. The output end of the first-stage spiral guide rotor is connected to the inlet chamber of the second-stage pressure distribution valve, and the two outlets of the second-stage pressure distribution valve are respectively connected to the oil inlet channels at both ends of the crankshaft.

[0009] In a preferred embodiment of this utility model, an involute-shaped guide groove is formed on the outer wall of the first-stage spiral guide rotor, with a spiral angle of 25-35°;

[0010] The secondary pressure distribution valve consists of a resilient valve plate and a dual-outlet flow regulating chamber.

[0011] In a preferred embodiment of this utility model, the elastic valve plate is made of beryllium bronze with a thickness of 0.3-0.8 mm and a response pressure difference range of 0.1-0.5 MPa.

[0012] In a preferred embodiment of this utility model, the depth of the involute guide groove is 2-3 mm, and the width of the groove is 1.5-2.0 times the depth of the groove.

[0013] In a preferred embodiment of this utility model, the pore size of the honeycomb microporous lubricating layer is 0.5-0.8 mm, and the density is 10-15 pores / cm².

[0014] In a preferred embodiment of the present invention, the bottom of the slide rail is provided with an inclined V-shaped oil guide ramp, the end of the V-shaped oil guide ramp is connected to an oil collection groove, and the oil collection groove is directly connected to the oil inlet of the crankcase body through a return oil pipeline to form a closed-loop oil circuit.

[0015] In a preferred embodiment of the present invention, the V-shaped oil guide ramp is inclined at 50-55° from the starting section to the end, and the surface of the ramp is provided with an oil-repellent layer.

[0016] In a preferred embodiment of this utility model, a piezoelectric ceramic oscillator is embedded in the oil collecting groove, with a vibration frequency of 10-20kHz and an amplitude of 15-20μm.

[0017] In a preferred embodiment of the present invention, the inner wall of the oil collecting tank is coated with an oleophobic coating.

[0018] In a preferred embodiment of this utility model, the connecting rod body is a hollow tubular structure, with its two ends respectively connected to the oil outlet of the crankshaft and the inner cavity of the crosshead body, forming a closed-loop oil circuit.

[0019] The beneficial effects of this utility model are as follows: This utility model provides a directional lubrication system for a compressor crankcase. Through the pressure-stabilizing and flow-dividing structure of a rotary two-stage distributor, the honeycomb microporous lubrication layer on the surface of the crosshead body, and the forced closed-loop oil circuit composed of a V-shaped oil guide ramp and an ultrasonic oil collection groove, the system achieves a stable oil pressure difference between the two ends of the crankshaft within 5%, full coverage of the oil film on the contact surface of the moving parts, and an increase in the closed-loop oil circuit recovery rate to over 85%, significantly reducing energy consumption and maintenance costs. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of a preferred embodiment of a compressor crankcase directional lubrication system according to the present invention;

[0021] Figure 2 yes Figure 1 A schematic diagram of a rotary two-stage distributor mounted on the crankshaft;

[0022] Figure 3 This is a side view structural diagram showing the positional relationship between the crosshead, slide rail, V-shaped oil guide ramp, and oil collection groove.

[0023] Figure 4 yes Figure 2 A top view of the elastic valve plate of the intermediate two-stage pressure distribution valve;

[0024] The components in the attached diagram are labeled as follows:

[0025] 10. Crankcase body; 11. Oil inlet;

[0026] 20. Crankshaft; 30. Linkage assembly; 31. Connecting rod body; 32. Crosshead body; 33. Honeycomb microporous lubrication layer;

[0027] 40. Slide rail;

[0028] 50. Rotary two-stage distributor; 51. First-stage spiral guide rotor; 52. Second-stage pressure distribution valve; 521. Flexible valve plate; 522. Dual-outlet flow regulating chamber;

[0029] 60. V-shaped oil guide ramp; 70. Oil collection trough. Detailed Implementation

[0030] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0031] Please see Figure 1-4 The embodiments of this utility model include:

[0032] This utility model discloses a directional lubrication system for a compressor crankcase, comprising: a crankcase body 10, a crankshaft 20, a linkage assembly 30, a slide rail 40, a rotary two-stage distributor 50, a V-shaped oil guide ramp 60, and an oil collection groove 70.

[0033] The crankcase body 10 has an oil outlet at its bottom, which is connected to the oil inlet 11 of a rotary two-stage distributor 50 via a pipeline. The rotary two-stage distributor 50 is installed on the crankshaft 20 to achieve dynamic and balanced distribution of oil pressure.

[0034] Specifically, the rotary two-stage distributor 50 includes a primary spiral guide rotor 51 and a secondary pressure distribution valve 52. The primary spiral guide rotor 51 has an involute guide groove with a helix angle of 25°-35° on its outer wall, a groove depth of 2-3 mm, and a groove width 1.5-2.0 times the groove depth, used to reduce turbulence of the lubricating oil. The secondary pressure distribution valve 52 consists of an elastic valve plate 521 and a dual-outlet flow regulating chamber 522, used to evenly distribute lubricating oil to both ends of the crankshaft 20. The elastic valve plate 521 is made of beryllium bronze, with a thickness of 0.3-0.8 mm, preferably 0.5 mm, and a response pressure difference range of 0.1-0.5 MPa. The output end of the primary spiral guide rotor 51 is connected to the inlet chamber of the secondary pressure distribution valve 52, and its end is axially clearance-fitted with the elastic valve plate.

[0035] The crankshaft 20 extends vertically through the middle of the crankcase body 10.

[0036] The linkage assembly 30 consists of two sets, located on both sides of the crankshaft 20, and includes a connecting rod body 31 and a crosshead body 32. The connecting rod body 31 is a hollow tubular structure, with one end connected to the oil outlet of the crankshaft 20 and the other end connected to the inner cavity of the crosshead body 32, forming an oil passage.

[0037] The slide rail 40 is installed inside the crankcase body 10 and is located below the crosshead body 32 of the linkage assembly 30. The lubricating oil flowing out of the crosshead body 32 will enter the slide rail 40.

[0038] The V-shaped oil guide ramp 60 is located at the bottom of the slide rail 40, and its width is greater than that of the slide rail. Combined with the V-shaped structure design, it allows all the lubricating oil to fall onto the V-shaped oil guide ramp. The V-shaped oil guide ramp 60 is an inclined structure, specifically, it slopes downward at an angle of 50-55° from the starting section to the end, and the surface of the ramp is provided with an oil-repellent layer.

[0039] The oil collecting trough 70 is installed at the end of the V-shaped oil guide ramp 60 to collect the lubricating oil collected by the V-shaped oil guide ramp 60. Its inner wall has an oleophobic coating. Specifically, the oil collecting trough 70 is an ultrasonic oil collecting trough, which embeds a piezoelectric ceramic oscillator with a vibration frequency of 10-20kHz and an amplitude of 15-20μm. The vibration of the piezoelectric ceramic oscillator breaks the surface tension of the oil and increases the oil return speed. Through the design of the V-shaped oil guide ramp 60 and the oil collecting trough 70, a closed loop of directional lubricating oil recovery is formed, improving the recovery efficiency.

[0040] The contact surface between the crosshead body 32 and the slide rail 40 is also covered with a honeycomb microporous lubricating layer 33, specifically a laser-processed microporous array with a pore size of 0.5-0.8 mm and a density of 10-15 pores / cm², such as 12 pores / cm². 2 The lubricating oil inside the crosshead body 32 continuously seeps out from the honeycomb microporous lubrication layer through capillary action, ensuring full oil film coverage in high-load areas and improving lubrication performance.

[0041] The working principle of the above-mentioned compressor crankcase directional lubrication system is as follows: after the lubricating oil is steadily distributed from the oil inlet 11 by the rotary two-stage distributor 50, it enters the oil passages at both ends of the crankshaft 20; it flows through the connecting rod body 31 to the inner cavity of the crosshead body 32, and continuously seeps oil through the honeycomb microporous lubrication layer to the slide rail 40; the waste oil flows along the V-shaped oil guide ramp 60 into the oil collection tank 70, and after being demulsified by ultrasonic vibration, it is pumped back to the oil inlet 11 by the return oil pipeline.

[0042] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A directional lubrication system for a compressor crankcase, characterized in that, include: Crankcase body, crankshaft, linkage assembly, slide rails, and rotary two-stage distributor; The crankshaft is installed in the middle of the crankcase body; the slide rail is installed in the crankcase body and located below the linkage assembly; The linkage component includes a connecting rod body and a crosshead body. The crosshead body contacts the slide rail, and the contact surface is covered with a honeycomb microporous lubricating layer. The rotary two-stage distributor is installed at the oil inlet of the crankcase body and includes a first-stage spiral guide rotor and a second-stage pressure distribution valve. The output end of the first-stage spiral guide rotor is connected to the inlet chamber of the second-stage pressure distribution valve, and the two outlets of the second-stage pressure distribution valve are respectively connected to the oil inlet channels at both ends of the crankshaft.

2. The system according to claim 1, characterized in that, The outer wall of the first-stage spiral guide rotor is provided with an involute-shaped guide groove, and the spiral angle is 25-35°. The secondary pressure distribution valve consists of a resilient valve plate and a dual-outlet flow regulating chamber.

3. The system according to claim 2, characterized in that, The elastic valve plate is made of beryllium bronze with a thickness of 0.3-0.8 mm and a response pressure difference range of 0.1-0.5 MPa.

4. The system according to claim 2, characterized in that, The involute guide groove has a depth of 2-3 mm and a width of 1.5-2.0 times the depth.

5. The system according to claim 1, characterized in that, The honeycomb microporous lubricating layer has a pore size of 0.5-0.8 mm and a density of 10-15 pores / cm².

6. The system according to claim 1, characterized in that, The bottom of the slide rail is provided with an inclined V-shaped oil guide ramp. The end of the V-shaped oil guide ramp is connected to an oil collection groove. The oil collection groove is directly connected to the oil inlet of the crankcase body through a return oil pipeline, forming a closed-loop oil circuit.

7. The system according to claim 6, characterized in that, The V-shaped oil guide ramp slopes at 50-55° from the beginning to the end, and the ramp surface is provided with an oil-repellent layer.

8. The system according to claim 6, characterized in that, The oil collecting groove is embedded with a piezoelectric ceramic oscillator with a vibration frequency of 10-20kHz and an amplitude of 15-20μm.

9. The system according to claim 8, characterized in that, The inner wall of the oil collection tank is coated with an oleophobic coating.

10. The system according to claim 1, characterized in that, The connecting rod body is a hollow tubular structure, with its two ends connected to the oil outlet of the crankshaft and the inner cavity of the crosshead body, respectively, forming a closed-loop oil circuit.

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