Connecting rod assembly and diaphragm compressor

Abstract

The utility model discloses a connecting rod assembly and a diaphragm compressor, and relates to the technical field of compressors. The connecting rod assembly comprises an eccentric wheel and a connecting rod body, the eccentric wheel is used for being connected to a motor shaft of the diaphragm compressor and enabling the motor shaft to drive the eccentric wheel to rotate, one end of the connecting rod body is connected to the eccentric wheel, and the other end of the connecting rod body is used for being connected to a diaphragm of the diaphragm compressor and driving the diaphragm to reciprocate in the extending direction of the connecting rod body. The connecting rod body comprises the first connecting rod and the second connecting rod, the eccentric wheel is connected with the first connecting rod and the second connecting rod, and the first connecting rod and the second connecting rod are symmetrically arranged along the eccentric wheel, so that the first connecting rod and the second connecting rod can oppositely impact to balance vibration, vibration generated during operation of the diaphragm compressor is reduced, and the vibration balance effect is improved; modeling data, a large amount of analog calculation and simulation verification are not needed, and a large amount of labor cost of designers and assemblers is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a connecting rod assembly and a diaphragm compressor. Background Art

[0002] Diaphragm compressors are usually used to transport gas or gas-liquid mixed media in in vitro diagnostic equipment, and require long-term, uninterrupted operation. During operation, the medium state will continuously change between gas, gas-liquid mixed state and liquid state, causing the pump head load to continuously change, thereby causing the compressor vibration to continuously change. Since in vitro diagnostic equipment contains a large number of sensors and biological and chemical analysis elements, its analysis results are easily affected by large or unstable vibration values, resulting in inaccurate diagnostic results.

[0003] Diaphragm compressors feature a connecting rod assembly that pulls on the diaphragm to change the chamber volume, thereby creating a vacuum or generating pressure. To reduce vibration in diaphragm compressors, the current mainstream design uses an eccentric wheel with a connecting rod, and a counterweight on the eccentric wheel to balance the generated vibration. However, this counterweight design requires modeling data, extensive simulation calculations, and simulation verification. Furthermore, in practice, the vibration balancing effect is not ideal. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art in that the operation of balancing vibration of the connecting rod assembly of the diaphragm compressor is complicated and the effect of balancing vibration is poor, and provide a connecting rod assembly and a diaphragm compressor.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] The utility model provides a connecting rod assembly, the connecting rod assembly comprising an eccentric wheel and a connecting rod body, the eccentric wheel being used to be connected to the motor shaft of a diaphragm compressor so that the motor shaft can drive the eccentric wheel to rotate, one end of the connecting rod body being connected to the eccentric wheel, and the other end of the connecting rod body being used to be connected to the diaphragm of the diaphragm compressor and drive the diaphragm to reciprocate in the extension direction of the connecting rod body;

[0007] The connecting rod body includes a first connecting rod and a second connecting rod, the eccentric wheel is connected to the first connecting rod and the second connecting rod respectively, and the first connecting rod and the second connecting rod are symmetrically arranged along the eccentric wheel.

[0008] In this solution, the eccentric wheel is connected to the motor shaft of the diaphragm compressor, and the motor shaft rotates to drive the eccentric wheel to rotate. One end of the connecting rod body is connected to the eccentric wheel, and the other end is connected to the diaphragm of the diaphragm compressor. The eccentric wheel rotates to drive the diaphragm to reciprocate in the extension direction of the connecting rod body. When the diaphragm compressor is running, the motor shaft drives the eccentric wheel to rotate, and the eccentric wheel drives the first connecting rod and the second connecting rod to move. The first connecting rod and the second connecting rod drive the diaphragm to reciprocate in the extension direction of the connecting rod body, thereby changing the volume of the chamber to form pressure. By setting the first connecting rod and the second connecting rod, and arranging the first connecting rod and the second connecting rod symmetrically along the eccentric wheel, the first connecting rod and the second connecting rod can offset each other to balance vibration, thereby reducing the vibration generated by the operation of the diaphragm compressor and improving the vibration balancing effect. There is no need for modeling data, a large amount of simulation calculations and simulation verification, which saves a lot of manpower costs for designers and assemblers.

[0009] Preferably, the eccentric wheel includes a main body and a first fixing part and a second fixing part provided at both ends of the main body, one end of the first connecting rod is connected to the first fixing part, and one end of the second connecting rod is connected to the second fixing part.

[0010] In this solution, the eccentric wheel includes a main body, a first fixing part and a second fixing part. The first fixing part and the second fixing part are respectively arranged at both ends of the main body. The first connecting rod is connected to the eccentric wheel through the first fixing part, and the second connecting rod is connected to the eccentric wheel through the second fixing part. Since the main body is provided between the first fixing part and the second fixing part, there is a certain distance between the first fixing part and the second fixing part, thereby avoiding interference between the first connecting rod and the second connecting rod during operation, so that the connecting rod assembly can run more smoothly.

[0011] Preferably, the first fixing portion and the second fixing portion are symmetrically arranged along the axis of the main body.

[0012] In this solution, the first fixing part and the second fixing part are symmetrically arranged along the axis of the main body, so that when the eccentric wheel rotates, the first connecting rod and the second connecting rod can be driven to move symmetrically, so that the first connecting rod and the second connecting rod offset and balance the vibration, thereby reducing the vibration generated by the operation of the diaphragm compressor.

[0013] Preferably, the first connecting rod includes a first body and a first connecting portion, two ends of the first body are connected to the diaphragm and the first connecting portion respectively, and the first connecting portion is sleeved on the first fixing portion;

[0014] And / or, the second connecting rod includes a second body and a second connecting portion, two ends of the second body are respectively connected to the diaphragm and the second connecting portion, and the second connecting portion is sleeved on the second fixing portion.

[0015] In this solution, the first connecting rod includes a first body and a first connecting part. The two ends of the first body are respectively connected to the diaphragm and the first connecting part. The first connecting part is sleeved on the first fixed part. When the eccentric wheel rotates, the first fixed part drives the first connecting part to rotate, and then drives the first body to move. The first body drives the diaphragm connected to the first body to reciprocate.

[0016] The second connecting rod includes a second body and a second connecting part. The two ends of the second body are respectively connected to the diaphragm and the second connecting part. The second connecting part is sleeved on the second fixed part. When the eccentric wheel rotates, the second fixed part drives the second connecting part to rotate, and then drives the second body to move. The second body drives the diaphragm connected to the second body to reciprocate.

[0017] Preferably, the connecting rod assembly further comprises a first bearing, wherein the outer ring and the inner ring of the first bearing are respectively connected to the first connecting portion and the first fixing portion;

[0018] And / or, the connecting rod assembly further includes a second bearing, an outer ring and an inner ring of the second bearing are respectively connected to the second connecting portion and the second fixing portion.

[0019] In this solution, the first bearing is arranged between the first connecting part and the first fixed part. The outer ring and the inner ring of the first bearing are respectively connected to the first connecting part and the first fixed part. When the eccentric wheel rotates, the first fixed part drives the inner ring of the first bearing to move, and the outer ring of the first bearing then drives the first connecting part to move. By setting the first bearing, the first connecting part can rotate relative to the first fixed part.

[0020] The second bearing is arranged between the second connecting part and the second fixed part. The outer ring and the inner ring of the second bearing are respectively connected to the second connecting part and the second fixed part. When the eccentric wheel rotates, the second fixed part drives the inner ring of the second bearing to move, and the outer ring of the second bearing then drives the second connecting part to move. By setting the second bearing, the second connecting part can be driven relative to the second fixed part.

[0021] Preferably, an axial hole is provided on the central axis of the eccentric wheel, and the axial hole is used to be fixed to the motor shaft of the diaphragm compressor.

[0022] In this solution, an axial hole is provided on the central axis of the eccentric wheel, and the motor shaft is fixed on the axial hole, so that the motor shaft can drive the eccentric wheel to rotate around the central axis.

[0023] Preferably, a first axial hole and a second axial hole are respectively formed on the first fixing portion and the second fixing portion, and the first axial hole and the second axial hole are communicated along the axial direction of the motor shaft.

[0024] In this solution, the first axial hole and the second axial hole are connected in the axial direction along the motor shaft, so that the first axial hole and the second axial hole are on the same axis. The first connecting part fixed to the first fixed part and the second connecting part fixed to the second fixed part are on the same axis, and the first connecting rod and the second connecting rod can be symmetrically arranged along the eccentric wheel.

[0025] Preferably, the connecting rod assembly further includes a fixing piece, the eccentric wheel is provided with a fixing hole, the fixing hole is communicated with the shaft hole, and the fixing piece passes through the fixing hole and is connected to the motor shaft.

[0026] In this solution, a fixing hole is provided on the eccentric wheel, and a fixing member passes through the fixing hole and is connected to the motor shaft, thereby fixing the motor shaft to the shaft hole, so that the motor shaft can drive the eccentric wheel to rotate.

[0027] Preferably, a first notch is provided on the outer side of the main body, and the first notch is provided on a side of the main body away from the first body;

[0028] And / or, a second notch is provided on the outer side of the main body, and the second notch is provided on a side of the main body away from the second body.

[0029] In this solution, a first notch is provided on the side of the main body away from the first body, thereby preventing the first connecting portion from interfering with the main body when the eccentric wheel rotates. A second notch is provided on the side of the main body away from the second body, thereby preventing the second connecting portion from interfering with the main body when the eccentric wheel rotates.

[0030] The utility model also provides a diaphragm compressor, which includes the connecting rod assembly as described above.

[0031] The positive progress effect of this utility model is:

[0032] The connecting rod assembly includes an eccentric wheel and a connecting rod body. The connecting rod body includes a first connecting rod and a second connecting rod. The eccentric wheel is connected to the motor shaft of the diaphragm compressor. The motor shaft rotates to drive the eccentric wheel to rotate. One end of the connecting rod body is connected to the eccentric wheel, and the other end is connected to the diaphragm of the diaphragm compressor. The eccentric wheel rotates to drive the diaphragm to reciprocate in the extension direction of the connecting rod body. When the diaphragm compressor is running, the motor shaft drives the eccentric wheel to rotate, and the eccentric wheel drives the first connecting rod and the second connecting rod to move. The first connecting rod and the second connecting rod drive the diaphragm to reciprocate in the extension direction of the connecting rod body, thereby changing the volume of the chamber to form pressure. By setting the first connecting rod and the second connecting rod, and arranging the first connecting rod and the second connecting rod symmetrically along the eccentric wheel, the first connecting rod and the second connecting rod can offset each other to balance vibration, thereby reducing the vibration generated by the operation of the diaphragm compressor and improving the vibration balancing effect. There is no need for modeling data, a large amount of simulation calculations and simulation verification, which saves a lot of manpower costs for designers and assemblers. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic cross-sectional perspective structural diagram of a diaphragm compressor according to an embodiment of the present invention.

[0034] Figure 2 It is a schematic diagram of the three-dimensional structure of a connecting rod assembly according to an embodiment of the present utility model.

[0035] Figure 3 1 is an exploded view of a connecting rod assembly according to an embodiment of the present invention.

[0036] Figure 4 It is a schematic diagram of the three-dimensional structure of an eccentric wheel according to an embodiment of the present utility model.

[0037] Description of reference numerals:

[0038] Diaphragm compressor 100

[0039] Diaphragm 110

[0040] Connecting rod assembly 120

[0041] Motor shaft 130

[0042] Inner cavity 140

[0043] Eccentric wheel 200

[0044] Central axis 210

[0045] Main body 220

[0046] First Gap 221

[0047] Second gap 222

[0048] First fixing portion 230

[0049] Second fixing portion 240

[0050] Axis hole 250

[0051] First shaft hole 251

[0052] Second shaft hole 252

[0053] Fixing hole 260

[0054] Fixing 270

[0055] Connecting rod body 300

[0056] First connecting rod 310

[0057] First body 311

[0058] First connection portion 312

[0059] Second connecting rod 320

[0060] Second body 321

[0061] Second connection portion 322

[0062] First bearing 410

[0063] Second bearing 420 DETAILED DESCRIPTION

[0064] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the following examples.

[0065] like Figure 1 As shown, this embodiment provides a diaphragm compressor 100 , which includes a connecting rod assembly 120 .

[0066] like Figure 2 and Figure 3 As shown, the connecting rod assembly 120 includes an eccentric wheel 200 and a connecting rod body 300. The eccentric wheel 200 is used to connect to the motor shaft 130 of the diaphragm compressor 100 so that the motor shaft 130 can drive the eccentric wheel 200 to rotate. One end of the connecting rod body 300 is connected to the eccentric wheel 200, and the other end of the connecting rod body 300 is used to connect to the diaphragm 110 of the diaphragm compressor 100 and drive the diaphragm 110 to reciprocate in the extension direction of the connecting rod body 300. The connecting rod body 300 includes a first connecting rod 310 and a second connecting rod 320. The eccentric wheel 200 is connected to the first connecting rod 310 and the second connecting rod 320, respectively. The first connecting rod 310 and the second connecting rod 320 are symmetrically arranged along the eccentric wheel 200.

[0067] The eccentric wheel 200 is connected to the motor shaft 130 of the diaphragm compressor 100. The motor shaft 130 rotates to drive the eccentric wheel 200 to rotate. One end of the connecting rod body 300 is connected to the eccentric wheel 200, and the other end is connected to the diaphragm 110 of the diaphragm compressor 100. The eccentric wheel 200 rotates to drive the diaphragm 110 to reciprocate in the extension direction of the connecting rod body 300. Therefore, when the diaphragm compressor 100 is running, the motor shaft 130 drives the eccentric wheel 200 to rotate, and the eccentric wheel 200 drives the first connecting rod 310 and the second connecting rod 320 to move. The first connecting rod 310 and the second connecting rod 320 drive the diaphragm 110 to reciprocate in the extension direction of the connecting rod body 300, thereby changing the volume of the inner cavity 140 of the diaphragm compressor 100 to form pressure. By setting the first connecting rod 310 and the second connecting rod 320, and arranging the first connecting rod 310 and the second connecting rod 320 symmetrically along the eccentric wheel 200, the first connecting rod 310 and the second connecting rod 320 can offset each other to balance the vibration, thereby reducing the vibration generated by the operation of the diaphragm compressor 100 and improving the vibration balancing effect. There is no need for modeling data, a large amount of simulation calculations and simulation verification, which saves a lot of manpower costs for designers and assemblers.

[0068] like Figure 4 As shown, the eccentric wheel 200 includes a main body 220 and a first fixing portion 230 and a second fixing portion 240 provided at both ends of the main body 220. One end of the first connecting rod 310 is connected to the first fixing portion 230, and one end of the second connecting rod 320 is connected to the second fixing portion 240. The eccentric wheel 200 includes a main body 220, a first fixing portion 230, and a second fixing portion 240. The first fixing portion 230 and the second fixing portion 240 are respectively provided at both ends of the main body 220. The first connecting rod 310 is connected to the eccentric wheel 200 through the first fixing portion 230, and the second connecting rod 320 is connected to the eccentric wheel 200 through the second fixing portion 240. Since the main body 220 is provided between the first fixing portion 230 and the second fixing portion 240, a certain distance is provided between the first fixing portion 230 and the second fixing portion 240, thereby avoiding interference between the first connecting rod 310 and the second connecting rod 320 during operation, making the connecting rod assembly 120 operate more smoothly.

[0069] The first fixing portion 230 and the second fixing portion 240 are symmetrically arranged along the axis of the main body 220, so that when the eccentric wheel 200 rotates, it can drive the first connecting rod 310 and the second connecting rod 320 to move symmetrically, so that the first connecting rod 310 and the second connecting rod 320 offset and balance vibration, thereby reducing the vibration generated by the operation of the diaphragm compressor 100.

[0070] The first connecting rod 310 includes a first body 311 and a first connecting portion 312. The two ends of the first body 311 are respectively connected to the diaphragm 110 and the first connecting portion 312. The first connecting portion 312 is sleeved on the first fixed portion 230. When the eccentric wheel 200 rotates, the first fixed portion 230 drives the first connecting portion 312 to rotate, and then drives the first body 311 to move. The first body 311 drives the diaphragm 110 connected to the first body 311 to reciprocate.

[0071] The second connecting rod 320 includes a second body 321 and a second connecting portion 322. The two ends of the second body 321 are respectively connected to the diaphragm 110 and the second connecting portion 322. The second connecting portion 322 is sleeved on the second fixed portion 240. When the eccentric wheel 200 rotates, the second fixed portion 240 drives the second connecting portion 322 to rotate, and then drives the second body 321 to move. The second body 321 drives the diaphragm 110 connected to the second body 321 to reciprocate.

[0072] The connecting rod assembly 120 also includes a first bearing 410, the outer ring and inner ring of the first bearing 410 are respectively connected to the first connecting part 312 and the first fixed part 230. When the eccentric wheel 200 rotates, the first fixed part 230 drives the inner ring of the first bearing 410 to move, and the outer ring of the first bearing 410 then drives the first connecting part 312 to move. By setting the first bearing 410, the first connecting part 312 can rotate relative to the first fixed part 230.

[0073] The connecting rod assembly 120 also includes a second bearing 420, the outer ring and inner ring of the second bearing 420 are respectively connected to the second connecting part 322 and the second fixed part 240. When the eccentric wheel 200 rotates, the second fixed part 240 drives the inner ring of the second bearing 420 to move, and the outer ring of the second bearing 420 then drives the second connecting part 322 to move. By setting the second bearing 420, the second connecting part 322 can be driven relative to the second fixed part 240.

[0074] An axial hole 250 is defined on the central shaft 210 of the eccentric wheel 200 . The axial hole 250 is used to be fixed to the motor shaft 130 of the diaphragm compressor 100 , so that the motor shaft 130 can drive the eccentric wheel 200 to rotate around the central shaft 210 .

[0075] The first fixing portion 230 and the second fixing portion 240 are respectively provided with a first axial hole 251 and a second axial hole 252. Along the axial direction of the motor shaft 130, the first axial hole 251 and the second axial hole 252 are connected, so that the first axial hole 251 and the second axial hole 252 are on the same axis. The first connecting portion 312 fixed to the first fixing portion 230 and the second connecting portion 322 fixed to the second fixing portion 240 can be on the same axis, and the first connecting rod 310 and the second connecting rod 320 can be symmetrically arranged along the eccentric wheel 200.

[0076] The connecting rod assembly 120 also includes a fixing member 270. A fixing hole 260 is provided on the eccentric wheel 200. The fixing hole 260 is connected to the shaft hole 250. The fixing member 270 passes through the fixing hole 260 and is connected to the motor shaft 130, thereby fixing the motor shaft 130 on the shaft hole 250, so that the motor shaft 130 can drive the eccentric wheel 200 to rotate.

[0077] The outer side of the main body 220 is provided with a first notch 221, which is provided on the side of the main body 220 away from the first body 311. The first notch 221 is provided on the side of the main body 220 away from the first body 311 to prevent the first connecting portion 312 from interfering with the main body 220 when the eccentric wheel 200 rotates.

[0078] The outer side of the main body 220 is provided with a second notch 222, which is provided on the side of the main body 220 away from the second body 321. The second notch 222 is provided on the side of the main body 220 away from the second body 321 to prevent the second connecting portion 322 from interfering with the main body 220 when the eccentric wheel 200 rotates.

[0079] The first connecting portion 312 is annular and is sleeved on the outside of the first bearing 410, so that the shape of the first connecting portion 312 better matches the bearing, making it easier for the first connecting portion 312 to be connected to the first bearing 410. The second connecting portion 322 is annular and is sleeved on the outside of the second bearing 420, so that the shape of the second connecting portion 322 better matches the bearing, making it easier for the second connecting portion 322 to be connected to the second bearing 420.

[0080] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate the orientation or position relationship of the device or component during normal use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation at any time. Therefore, they should not be understood as limiting the present invention in this regard.

[0081] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of protection of the present invention.

Claims

1. A connecting rod assembly, characterized in that: The connecting rod assembly includes an eccentric wheel and a connecting rod body, wherein the eccentric wheel is used to be connected to the motor shaft of the diaphragm compressor so that the motor shaft can drive the eccentric wheel to rotate, and one end of the connecting rod body is connected to the eccentric wheel, and the other end of the connecting rod body is used to be connected to the diaphragm of the diaphragm compressor and drive the diaphragm to reciprocate in the extension direction of the connecting rod body; The connecting rod body includes a first connecting rod and a second connecting rod, the eccentric wheel is connected to the first connecting rod and the second connecting rod respectively, and the first connecting rod and the second connecting rod are symmetrically arranged along the eccentric wheel.

2. The connecting rod assembly according to claim 1, wherein: The eccentric wheel includes a main body and a first fixing portion and a second fixing portion provided at both ends of the main body. One end of the first connecting rod is connected to the first fixing portion, and one end of the second connecting rod is connected to the second fixing portion.

3. The connecting rod assembly according to claim 2, wherein: The first fixing portion and the second fixing portion are symmetrically arranged along the central axis of the main body.

4. The connecting rod assembly according to claim 2, wherein: The first connecting rod includes a first body and a first connecting portion, wherein two ends of the first body are connected to the diaphragm and the first connecting portion respectively, and the first connecting portion is sleeved on the first fixing portion; And / or, the second connecting rod includes a second body and a second connecting portion, two ends of the second body are respectively connected to the diaphragm and the second connecting portion, and the second connecting portion is sleeved on the second fixing portion.

5. The connecting rod assembly according to claim 4, wherein: The connecting rod assembly further includes a first bearing, wherein the outer ring and the inner ring of the first bearing are respectively connected to the first connecting portion and the first fixing portion; And / or, the connecting rod assembly further includes a second bearing, wherein the outer ring and the inner ring of the second bearing are respectively connected to the second connecting portion and the second fixing portion.

6. The connecting rod assembly according to claim 2, wherein: An axial hole is provided on the central axis of the eccentric wheel, and the axial hole is used to be fixed to the motor shaft of the diaphragm compressor.

7. The connecting rod assembly according to claim 6, wherein: A first axial hole and a second axial hole are respectively formed on the first fixing portion and the second fixing portion. The first axial hole and the second axial hole are communicated along the axial direction of the motor shaft.

8. The connecting rod assembly according to claim 6, wherein: The connecting rod assembly further includes a fixing piece. The eccentric wheel is provided with a fixing hole, the fixing hole is communicated with the shaft hole, and the fixing piece passes through the fixing hole and is connected to the motor shaft.

9. The connecting rod assembly according to claim 4, wherein: A first notch is provided on the outer side of the main body, and the first notch is provided on a side of the main body away from the first body; And / or, a second notch is provided on the outer side of the main body, and the second notch is provided on a side of the main body away from the second body.

10. A diaphragm compressor, characterized in that: The diaphragm compressor comprises the connecting rod assembly according to any one of claims 1 to 9.

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