An oil circuit lubrication system in a compressor crankcase

Abstract

The present invention discloses an oil circuit lubrication system in a compressor crankcase, comprising a crankcase, a crankshaft and a linkage assembly; the crankshaft has a first oil channel at one end close to the oil inlet of the crankcase, and has a second oil channel at the other end; the linkage assembly is located on both sides of the crankshaft, one end is connected to the crankshaft, and the other end is connected to the piston rod; the linkage assembly has an oil circuit channel; the first oil inlet of the first oil channel is connected to the oil inlet; the first oil inlet and the second oil inlet of the second oil channel are connected through an upper bearing; the first oil outlet of the first oil channel and the second oil outlet of the second oil channel are respectively connected to the oil circuit channels in the corresponding linkage assembly, and the oil circuit channels are connected to the crankcase. The present invention realizes orderly diversion of the lubricating oil added to the crankcase through the various moving parts in the crankcase, realizes full lubrication of the moving parts, effectively improves the lubrication effect, has strong practicality, and helps to increase the service life of the compressor and improve its working efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of diaphragm compressors, and in particular to an oil circuit lubrication system in a compressor crankcase. Background Art

[0002] The diaphragm compressor is a positive displacement compressor. It relies on the motor to drive the crankshaft in the crankcase to rotate at high speed. The crankshaft drives the connecting rod, which is connected to one end of the crosshead. The other end of the crosshead is connected to the piston rod. The piston rod pushes the diaphragm in the diaphragm head to achieve gas compression. During the above working process, the moving parts in the crankcase need to be fully lubricated and cooled.

[0003] Under high load or extreme working conditions, the oil system of the existing structure may not be able to ensure that all moving parts can obtain sufficient and uniform lubrication, which may lead to local overheating, increased wear, and even component damage. Summary of the invention

[0004] The present invention can solve the problems of the existing structure caused by uneven lubrication by providing an oil circuit lubrication system in a compressor crankcase.

[0005] In order to solve the above technical problems, the present invention provides an oil circuit lubrication system in a compressor crankcase, comprising: a crankcase and a crankshaft and a linkage assembly installed in the crankcase; The crankcase is provided with an oil inlet and an oil outlet; The crankshaft has a first oil passage at one end close to the crankcase oil inlet, wherein the first oil passage has a first oil inlet and a first oil outlet; the crankshaft has a second oil passage at the other end, wherein the second oil passage has a second oil inlet and a second oil outlet; The linkage assembly has two groups, which are respectively located on both sides of the crankshaft, one end of which is respectively connected to the crankshaft, and the other end is respectively connected to the piston rod; the linkage assembly has an oil channel; The first oil inlet is in communication with the oil inlet of the crankcase; the first oil inlet and the second oil inlet are connected via an upper bearing bush to form an oil delivery chamber; The first oil outlet and the second oil outlet are respectively communicated with inner passages of the oil circuit in the linkage assembly at corresponding positions, and the inner passages of the oil circuit are communicated with the crankcase.

[0006] In a preferred embodiment of the present invention, the linkage assembly includes a connecting rod structure and a crosshead structure; one end of the connecting rod structure is connected to the crankshaft, and the other end thereof is sleeve-connected to the crosshead structure; the inner channel of the oil circuit runs through the connecting rod structure and the crosshead structure.

[0007] In a preferred embodiment of the present invention, the connecting rod structure includes a connecting rod body, the connecting rod body has a connecting rod inner oil passage running through it, and the inner passage of the oil passage includes the connecting rod inner passage.

[0008] In a preferred embodiment of the present invention, the crosshead structure includes a crosshead pin and a crosshead body; The cross pin comprises an inner cavity and a cross through hole communicating with the inner cavity; The crosshead body is provided with a crosshead oil passage on the upper side and a crosshead oil passage on the lower side, and the crosshead oil passage on the upper side and the crosshead oil passage on the lower side are respectively connected with the inner cavity; The inner passage of the oil circuit includes the cross through hole, the inner cavity, the upper oil passage of the crosshead and the lower oil passage of the crosshead.

[0009] In a preferred embodiment of the present invention, the inner channel of the connecting rod is connected to the cross through hole.

[0010] In a preferred embodiment of the present invention, the crankcase is also provided with a slide rail at the position of the linkage assembly, and the crosshead body is mounted on the slide rail.

[0011] In a preferred embodiment of the present invention, the crosshead body has an oil passage on one side facing the slide rail, and the oil passage is communicated with the corresponding crosshead upper oil passage or crosshead lower oil passage.

[0012] The beneficial effects of the present invention are as follows: the present invention provides an oil circuit lubrication system in a crankcase of a compressor, through the structural design of the first oil channel and the second oil channel on the crankshaft, through the structural design of the channel in the oil circuit in the linkage assembly, and through the design of the connection relationship between the channel in the oil circuit and the first oil channel and the second oil channel on the crankshaft, so as to realize the orderly diversion of the lubricating oil replenished in the crankcase through the various moving parts in the crankcase, thereby achieving full lubrication of the moving parts, effectively improving the lubrication effect, having strong practicality, and helping to increase the service life of the compressor and improve its working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the internal structure of a preferred embodiment of an oil circuit lubrication system in a crankcase of a compressor of the present invention; Figure 2 yes Figure 1 A schematic diagram of a top view structure; Figure 3 is a schematic diagram of the internal structure of the crankshaft shown; Figure 4 is a schematic diagram of the internal structure of the connecting rod structure shown; Figure 5 is a schematic diagram of the internal structure of the crosshead assembly shown; The markings of the components in the accompanying drawings are as follows: 100. crankcase, 110. oil inlet, 120. oil inlet channel, 130. upper bearing, 140. slide rail; 200. crankshaft, 210. first oil passage, 211. first oil inlet, 212. first oil outlet, 220. second oil passage, 221. second oil inlet, 222. second oil outlet; 300. linkage assembly, 310. connecting rod structure, 311. connecting rod body, 312. upper bearing of big head bearing, 313. lower bearing of big head bearing, 314. copper sleeve, 315. oil passage in connecting rod, 320. crosshead structure, 321. crosshead pin, 322. crosshead body, 323. inner cavity, 324. cross through hole, 325. upper oil passage of crosshead, 326. lower oil passage of crosshead; DETAILED DESCRIPTION

[0014] The preferred embodiments of the present invention are described in detail below in conjunction with 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 protection scope of the present invention.

[0015] See also Figure 1 , the embodiment of the present invention includes: The present invention discloses an oil circuit lubrication system in a compressor crankcase, comprising: a crankcase 100 , a crankshaft 200 and a linkage assembly 300 ; the crankshaft 200 and the linkage assembly 300 are both installed in the crankcase 100 .

[0016] Specifically, the crankcase 100 has an oil inlet 110 in the middle of the bottom thereof for inputting lubricating oil into the crankcase 100 ; and the crankcase 100 has an oil outlet (not shown) at one side of the bottom thereof for discharging excess lubricating oil.

[0017] The crankshaft 200 vertically penetrates the crankcase 100. The end of the crankshaft 200 close to the oil inlet 110 of the crankcase 100 is provided with a first oil passage 210, and the first oil passage 210 has a first oil inlet 211 and a first oil outlet 212.

[0018] The crankshaft 200 has a second oil passage 220 at one end away from the oil inlet 110 of the crankcase 100 . The second oil passage 220 has a second oil inlet 221 and a second oil outlet 222 .

[0019] The lubricating oil entering the crankcase 100 through the oil inlet 110 flows into the corresponding first oil passage 210 and second oil passage 220 through the first oil inlet 211 and the second oil inlet 221 , respectively.

[0020] Specifically, the first oil inlet 211 is connected to the oil inlet 110 of the crankcase 100 through the oil inlet channel 120, and the first oil inlet 211 and the second oil inlet 221 are connected through the upper bearing 130 to form an oil delivery chamber for inputting lubricating oil from the first oil inlet 211 and the second oil inlet 221 into the corresponding oil channels in the crankshaft 200.

[0021] There are two groups of linkage components 300, which are respectively located on both sides of the crankshaft 200, one end of which is respectively connected to the crankshaft 200, and the other end is respectively connected to the piston rod 400; the linkage components 300 also have an oil circuit channel.

[0022] Specifically, the linkage assembly 300 includes a connecting rod structure 310 and a crosshead structure 320 .

[0023] The connecting rod structure 310 includes a connecting rod body 311 , a large head bearing upper bearing 312 , a large head bearing lower bearing 313 and a copper sleeve 314 . The connecting rod body 311 is provided with a connecting rod inner oil passage 315 .

[0024] The crosshead structure 320 includes a crosshead pin 321 and a crosshead body 322. The crosshead pin 321 has an inner cavity 323 and a cross through hole 324 connected to the inner cavity. The crosshead body 322 has a crosshead upper oil passage 325 and a crosshead lower oil passage 326, and the crosshead oil passage 325 and the crosshead lower oil passage 326 are respectively connected to the inner cavity 323.

[0025] One end (big end) of the connecting rod body 311 is connected to the crankshaft 200 by bolts and nuts; the big end bearing upper bearing 312 and the big end bearing lower bearing 313 are symmetrically mounted on the connecting rod body 311 and connected to the crankshaft 200. The other end (small end) of the connecting rod body 311 is provided with a copper sleeve 314, and is connected to the crosshead pin 321 through the copper sleeve 314, so as to realize the connection between the connecting rod body 311 and the crosshead structure 320.

[0026] One end of the connecting rod inner oil passage 315 is connected to the first oil inlet 211 or the second oil inlet 221 of the crankshaft 200, and the other end thereof is connected to the cross hole 324. The lubricating oil flowing in from the oil inlet 110 of the crankcase 100 flows into the corresponding first oil passage 210 or the second oil passage 220 from the first oil inlet 211 and / or the second oil inlet 221, and then flows into the corresponding connecting rod inner oil passage 315 from the first oil outlet 212 or the second oil outlet 222, and finally flows into the crankcase 100 through the cross hole 324, the inner cavity 323, the crosshead upper oil passage 325 and the crosshead lower oil passage 326 in sequence, and the excess oil is discharged from the oil outlet, so as to achieve full and uniform lubrication of the moving parts in the crankcase 100.

[0027] The oil passage in the linkage assembly 300 includes the connecting rod inner oil passage 315 , the cross through hole 324 , the inner cavity 323 , the crosshead upper oil passage 325 and the crosshead lower oil passage 326 .

[0028] In addition, a slide rail 140 is welded at each position of the two linkage components 300 in the crankcase 100, and the crosshead body 322 of the crosshead structure 320 is slidably mounted on the slide rail 140. The lubricating oil flowing out of the crosshead upper oil passage 325 and the crosshead lower oil passage 326 will enter the slide rail 140 to achieve lubrication between the crosshead structure 320 and the slide rail 140, and the excess oil will flow away through the slide rail 140, enter the crankcase 100, and finally be discharged from the oil drain port at the bottom of the crankcase 100.

[0029] The present invention realizes that the lubricating oil flows from the crankcase inlet through the first oil passage and the second oil passage of the crankshaft in sequence, flows out from the first oil passage and the second oil passage, respectively flows into the connecting rod inner oil passage inside the connecting rod structure, and finally enters the inner cavity of the crosshead structure, the crosshead upper oil passage and the crosshead lower oil passage through the cross through hole, returns to the crankcase through the slide rail, is discharged from its oil outlet, and then enters from the oil inlet to realize circulating lubrication, while ensuring that the crankshaft, the connecting rod structure and the crosshead structure are connected to the piston rod and the mechanical movement effect. The above structural design realizes that all the components in the crankcase can be fully lubricated and cooled by the lubricating oil, avoiding the components from being worn due to uneven lubrication, thereby improving the lubrication effect and increasing the service life of the above moving components.

[0030] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A compressor crankcase oil circuit lubrication system, characterized in that: include: A crankcase and a crankshaft and linkage assembly installed in the crankcase; The crankcase is provided with an oil inlet and an oil outlet; The crankshaft has a first oil passage at one end close to the crankcase oil inlet, wherein the first oil passage has a first oil inlet and a first oil outlet; the crankshaft has a second oil passage at the other end, wherein the second oil passage has a second oil inlet and a second oil outlet; The linkage assembly has two groups, which are respectively located on both sides of the crankshaft, one end of which is respectively connected to the crankshaft, and the other end is respectively connected to the piston rod; the linkage assembly has an oil channel; The first oil inlet is in communication with the oil inlet of the crankcase; the first oil inlet and the second oil inlet are connected via an upper bearing bush to form an oil delivery chamber; The first oil outlet and the second oil outlet are respectively communicated with inner passages of the oil circuit in the linkage assembly at corresponding positions, and the inner passages of the oil circuit are communicated with the crankcase.

2. The oil lubrication system in the crankcase of a compressor according to claim 1, characterized in that: The linkage assembly comprises a connecting rod structure and a crosshead structure; one end of the connecting rod structure is connected to the crankshaft, and the other end thereof is sleeve-connected to the crosshead structure; the inner channel of the oil circuit runs through the connecting rod structure and the crosshead structure.

3. The oil circuit lubrication system in a compressor crankcase according to claim 2, characterized in that: The connecting rod structure comprises a connecting rod body, the connecting rod body is provided with a connecting rod inner oil passage, and the inner passage of the oil passage comprises the connecting rod inner passage.

4. The oil circuit lubrication system in a compressor crankcase according to claim 3, characterized in that: The crosshead structure comprises a crosshead pin and a crosshead body; The cross pin comprises an inner cavity and a cross through hole communicating with the inner cavity; The crosshead body is provided with a crosshead oil passage and a crosshead lower oil passage, and the crosshead oil passage and the crosshead lower oil passage are respectively communicated with the inner cavity; The inner passage of the oil circuit includes the cross through hole, the inner cavity, the upper oil passage of the crosshead and the lower oil passage of the crosshead.

5. The oil circuit lubrication system in a compressor crankcase according to claim 4, characterized in that: The connecting rod inner channel is communicated with the cross through hole.

6. The oil circuit lubrication system in a compressor crankcase according to claim 5, characterized in that: The crankcase is also provided with a slide rail at the position of the linkage assembly, and the crosshead body is mounted on the slide rail.

7. The oil circuit lubrication system in a compressor crankcase according to claim 6, characterized in that: The crosshead body has an oil passage on one side facing the slide rail, and the oil passage is communicated with the corresponding crosshead upper oil passage or crosshead lower oil passage.

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