CN209083529U - Diaphragm type compressor - Google Patents

Abstract

The utility model discloses a kind of diaphragm type compressor and, part of cylinder block comprising diaphragm, hydraulic cylinder, cover board and supporting plate；Diaphragm periphery is fastened between cover board and supporting plate, forms membrane cavity and oil pocket；Supporting plate and diaphragm surround hydraulic cylinder；Crankcase, crankcase upper box are connect with part of cylinder block；Gear pump, gear pump setting are connect by inlet line with crankcase lower box in crankcase side, gear pump；And at least one plunger pump, plunger pump are arranged outside gear pump, plunger pump and gear pump pass through oil communication；The oil outlet of plunger pump is connect with hydraulic cylinder by repairing pipeline for the intracavitary repairing of oil supply.The utility model by adjusting plunger pump repairing opportunity, realize machine operation when diaphragm type compressor gas flow step-less adjustment, when can solve existing diaphragm type compressor repairing the problem of poor inspiration, at the same it is more convenient, economical, reduce energy consumption.

Description

Diaphragm type compressor

Technical field

The utility model belongs to diaphragm type compressor technical field, is related to a kind of diaphragm type compressor.

Background technique

In diaphragm type compressor, the function of cylinder is completed by a membrane cavity, cover board and diaphragm structure with vaulted inner surface Film forming chamber, and the supporting plate with domed surface is used to limit diaphragm lower limit position.Configuration is set on the hydraulic cylinder below supporting plate It is equipped with spill valve, many oil guiding holes are dispersed on supporting plate, are configured with intake valve and exhaust valve on cover board.When compressor is run, electricity For motivation by crank link mechanism come the piston in driving hydraulic cylinder, piston pushes diaphragm compressed gas by oil, in membrane cavity Gas opens exhaust valve when pressure reaches pressure at expulsion；When piston is from top dead centre downlink, diaphragm is then and then oily to equilbrium position Direction movement, thus membrane cavity volume increases, and starts inspiration gas in membrane cavity.So in cycles, diaphragm type compressor is just continuously Work.

When machine operation, the oil in hydraulic cylinder is inevitably leaked by piston ring.It is equivalent to subtract in this way Piston stroke is lacked, when piston reaches outer dead point, diaphragm just cannot fit with cover board, so that the clearance volume in membrane cavity is got over Come it is bigger, eventually prevent compressor from inspiration gas again ability of losing the job.

The tolerance adjusting method that diaphragm type compressor generallys use at present mainly has rotational speed regulation and bypass to adjust.Rotational speed regulation In, the revolving speed of frequency converter change driving machine is used for the regulative mode of motor.But when carrying out variable frequency adjustment to power grid Impact it is larger, body be easy to produce vibration cause it is chain parking, moving component abrasion increase, can not for a long time in underload Lower work.Frequency converter is expensive simultaneously, also increases cost.Bypass adjusting then mainly passes through the by-passing valve in pipeline for machine The extra tolerance of group discharge flows back into the entrance of unit through pipeline, to meet the burden requirement of production.But in terms of energy consumption There is also very big disadvantage, bypass is adjusted there is no the original compression process of compressor is changed, and extra return gas is still It is compressed, there is no the power consumptions for reducing compressor, so that compressor has been done many idle works, waste a large amount of energy.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the gas flow adjusting method of existing diaphragm type compressor, provide one Kind diaphragm type compressor, the gas flow realized under not shutdown status are adjusted, and solve existing flow rate adjusting method in diaphragm pressure Problem when being used in contracting machine, i.e., it is at high cost and energy consumption is high.

To achieve the goals above, the utility model is achieved using following technical scheme:

A kind of diaphragm type compressor, comprising:

Part of cylinder block；

Crankcase, crankcase upper box are connect with part of cylinder block；

Gear pump, gear pump setting are connect by inlet line with crankcase lower box in crankcase side, gear pump；

And at least one plunger pump, plunger pump are arranged outside gear pump, plunger pump and gear pump pass through oil communication；Column The oil outlet of plug pump is connect with hydraulic cylinder by repairing pipeline for the intracavitary repairing of oil supply.

Preferably, the plunger pump includes that setting is intracorporal in shell:

Cam, cam are set on the multi-diameter shaft of spindle nose, and main shaft is arranged in crankcase body；Cam and multi-diameter shaft Spring is provided between end face；

Bearing, bearing side and one side contacts of cam, the bearing other side and one side contacts of bearing block, and bearing and bearing block It is relatively unrotatable；

Block is pushed and pulled, push-and-pull block is connect with the bearing block other side, for adjusting the axial position of cam；

Plunger rod, plunger boom end and cam contact；

Plunger, plunger are connected on plunger rod, and cam drives plunger to move reciprocatingly by plunger rod.

Preferably, the cam includes columnar cam body, and spiral helicine convex body, cam are provided on cam body The key for connecting with main shaft is provided in ontology.

Preferably, the side of the bearing block is provided with non-circular connection convex body, push and pull be provided on block with it is described Connection convex body cooperation link slot.

Preferably, the plunger pump is two, and respectively the first plunger pump and the second plunger pump, the first plunger pump include First plunger rod and the first plunger, the second plunger pump include the second plunger rod and the second plunger；

First plunger rod, the first plunger boom end and cam contact；

Second plunger rod, the second plunger boom end and cam contact；First plunger rod is not coaxially disposed with the second plunger rod；

First plunger, the first plunger are connected on the first plunger rod, and cam drives the first plunger to do by the first plunger rod It moves back and forth；

And second plunger, the second plunger are connected on the second plunger rod, cam drives the second plunger by the second plunger rod It moves reciprocatingly.

Preferably, the gas flow of the phase difference between driving cam and main shaft is provided on the shell of the plunger pump Adjustment structure；The gas flow adjustment structure includes:

The shell of gland, gland and plunger pump connects；Mounting hole is offered on shell, pushes and pulls block) it is arranged in mounting hole, Gland is enclosed in outside mounting hole；

At least two screws, screw one end are connect with push-and-pull block, and the other end passes through gland and connect with connecting plate；

Stud, stud one end are connect with gland, and the other end passes through connecting plate and connect with handwheel.

Preferably, the scale mark for adjusting rotational angle is provided on the handwheel.

Preferably, the part of cylinder block includes diaphragm, hydraulic cylinder, cover board and supporting plate；Diaphragm periphery be fastened on cover board with Between supporting plate, membrane cavity and oil pocket are formed；Supporting plate and diaphragm surround hydraulic cylinder；Cover board with vaulted inner surface and there is vaulted table The supporting plate in face connects to form cavity, and membrane cavity is constituted between cover board and diaphragm, constitutes oil pocket between supporting plate and diaphragm, oil pocket and hydraulic The connection of cylinder inner cavity；The exhaust valve and intake valve being connected to membrane cavity are provided on cover board.

It preferably, further include spill valve；

It is provided with spill valve on hydraulic cylinder below the supporting plate, multiple oil guiding holes are dispersed on supporting plate, oil guiding hole is logical Oil channel is connect with oil spilling valve inlet, and oil spilling valve outlet connects crankcase lower box by oil return line.

Preferably, crank link mechanism is provided in the crankcase lower box, crank link mechanism driving piston is done It moves back and forth.

Compared with prior art, the utility model has the following beneficial effects:

Structure-plunger pump of gas flow adjusting is provided in the diaphragm type compressor of the utility model, in diaphragm type compressor Upper setting recharging oil device carries out repairing, carrys out the repairing into hydraulic cylinder especially by plunger pump.The oil solved in hydraulic cylinder passes through work Plug ring and leak, cause compressor cannot again inspiration gas the problem of.Repairing is carried out by continuous in time, can be made hydraulic There are enough oil masses in cylinder.So that piston stroke is unaffected, compressor is able to carry out normal sustained service.This is practical new Type realizes the stepless-adjustment of diaphragm type compressor gas flow by the repairing opportunity of adjustment plunger pump while compressor is run Section, when can solve existing diaphragm type compressor repairing the problem of poor inspiration, while it is more economical, reduce energy consumption.This is practical New structure is simple, easy for installation, and the tolerance of unit discharge does not flow back into entrance, avoids the waste of the energy, avoids increasing Add frequency converter equipment, reduces its expensive cost.

Further, the utility model carries out repairing using plunger pump structure, and the movement by main shaft with moving cam carries out week The repairing of phase property.When main shaft rotates, cam drives plunger to be followed by and moves reciprocatingly by plunger rod, so that plunger pump is revolved in main shaft It is primary can to start repairing in a certain position when circling.

The gas regulation method of the utility model is by machine exterior rotation hand wheel, to adjust between cam and main shaft Relative position and adjust the phase difference of plunger and piston, thus it is possible to vary start the repairing moment and diaphragm reach the limit of the position moment Phase difference, so as to realize the step-less adjustment of gas flow by adjusting the repairing opportunity of plunger pump.

Further, during installation, corresponding zero graduation on handwheel is cam most for cam and main shaft and handwheel Position far from crankcase, cam is moved toward crankcase direction after rotation hand wheel at this time, then when reversely rotating, and cam deviates from crankshaft Case movement.

Detailed description of the invention

Fig. 1 is the utility model embodiment septation compressor overall structure diagram；

Fig. 2 is the cross-sectional view of cam structure and piston structure in gas flow regulation mechanisms in the utility model embodiment；

Fig. 3 is the cross-sectional view of cam structure in gas flow regulation mechanisms in the utility model embodiment；

Fig. 4 is the left view direction cross-sectional view of Fig. 2 structure in the utility model embodiment；

Fig. 5 is the three-dimensional figure of cam parts in the utility model embodiment；

Fig. 6 is the main view and rearview of cam parts in the utility model embodiment；It (a) is main view, after (b) being View；

Fig. 7 is the left view of the utility model embodiment bottom bracket and the right view of push-and-pull block, and (a) is left view, (b) For right view.

In figure: 1. diaphragms, 2. pistons, 3. exhaust valves, 4. intake valves, 5. cover boards, 6. supporting plates, 7. hydraulic cylinders, 8. repairing pipes Road, 9. first plunger pumps, 10. gear pumps, 11. cams, 12. handwheels, 13. inlet lines, 14. second plunger pumps, 15. crankshafts Case, 16. oil return lines, 17. spill valves, 18. oil guiding holes, 19. first plunger rods, 20. tapered roller bearings, 21. push-and-pull blocks, 22. gland, 23. screws, 24. connecting plates, 25. studs, 26. screws, 27. second plunger rods, 28. second plungers, 29. main shafts, 30. spring, 31. bearing blocks, 32. first plungers, 33. convex bodys, 34. keys, 35. connection convex bodys, 36. link slots.

Specific embodiment

The utility model is described in more detail with reference to the accompanying drawings and examples:

Due to existing repairing mode can only a certain fixed position in one cycle carry out repairing, can not Tolerance is adjusted, thus the problem of will cause poor inspiration.But there is at high cost and energy consumption is high again for existing tolerance adjusting method The shortcomings that.

Referring to Fig. 1, the diaphragm type compressor of the utility model, mainly by motor, pedestal, crankcase, crankshaft link rod motion machine Structure, part of cylinder block, oil and gas pipeline, electric-control system and some attachmentes composition, the utility model are not especially limited.

Part of cylinder block includes diaphragm 1, piston 2, cover board 5 and supporting plate 6, cover board 5 with vaulted inner surface and is had vaulted The connection of supporting plate 6 on surface forms cavity, and 1 periphery of diaphragm is fastened between cover board 5 and supporting plate 6, the lid with vaulted inner surface Plate 5 and diaphragm 1 constitute membrane cavity.Supporting plate 6 is connect with hydraulic cylinder 7, and hydraulic cylinder 7 is connect with crankcase 15.Hydraulic cylinder 7 is provided with piston 2, crank link mechanism is provided in crankcase 15, crank link mechanism driving piston 2 moves reciprocatingly.It is configured on cover board 5 The exhaust valve 3 and intake valve 4 being connected to membrane cavity.

Working principle are as follows: in diaphragm type compressor, the function of cylinder is completed by a membrane cavity, and 1 periphery of diaphragm is fastened to Between cover board 5 and supporting plate 6, cover board 5 and diaphragm 1 with vaulted inner surface constitute membrane cavity, and the supporting plate 6 with domed surface is used To limit 1 lower limit position of diaphragm.When compressor is run, motor is by crank link mechanism come the work in driving hydraulic cylinder 7 Plug 2, piston 2 pushes 1 compressed gas of diaphragm by oil, and gas opens exhaust valve 3 when pressure reaches pressure at expulsion in membrane cavity；When When piston 2 is from top dead centre downlink, then and then oil move diaphragm 1 to equilbrium position direction, thus membrane cavity volume increase, intake valve 4 It is opened, starts inspiration gas in membrane cavity.

When machine operation, the oil in hydraulic cylinder 7 is inevitably leaked by piston ring.It is equivalent to subtract in this way 2 stroke of piston is lacked, when piston 2 reaches outer dead point, diaphragm 1 just cannot fit with cover board 5, so that the clearance in membrane cavity is held Product it is increasing, eventually prevent compressor from inspiration gas again ability of losing the job.

As shown in Figure 1, recharging oil device is therefore arranged on diaphragm type compressor carries out repairing, especially by the first plunger pump 9 And second repairing into hydraulic cylinder 7 of plunger pump 14.The oil solved in hydraulic cylinder 7 is leaked by piston ring, causes to compress Machine cannot again inspiration gas the problem of.Repairing is carried out by continuous in time, can make there are enough oil masses in hydraulic cylinder 7. 2 stroke of piston is unaffected, and compressor is able to carry out normal sustained service.

Further, and due to the compressibility very little of oil itself, when causing piston 2 less than top dead centre, diaphragm 1 is just first pasted The surface of cover board 5 is arrived, therefore oil pressure is excessively high in order to prevent, and 17 mechanism of spill valve should also be arranged on hydraulic cylinder 7.Oil return line 16 connection spill valve 17 outlets and 15 lower box of crankcase, inlet line 13 connect 15 lower box of crankcase and gear pump 10, mend 8 connection liquid cylinder pressure 7 of oil pipe line and the outlet of the first plunger pump 9 and the second plunger pump 14, constitute the circulation of oil circuit.Such Zhou Erfu Begin, compressor just continuously works.Many oil guiding holes 18 are dispersed on supporting plate 6.

As illustrated in fig. 1 and 2, a kind of diaphragm type compressor of the utility model, comprising:

Part of cylinder block comprising diaphragm 1, hydraulic cylinder 7, cover board 5 and supporting plate 6；1 periphery of diaphragm is fastened on cover board 5 and supporting plate 6 Between, form membrane cavity and oil pocket；Supporting plate 6 and diaphragm 1 surround hydraulic cylinder 7；

Crankcase 15,15 upper box of crankcase are connect with part of cylinder block；

Gear pump 10, the setting of gear pump 10 pass through oil in 15 side of crankcase, plunger pump 9 and plunger pump 14 and gear pump 10 Road connection；Gear pump 10 is connect with 15 lower box of crankcase by inlet line 11 for giving plunger pump 9 and plunger pump 14 fuel feeding；

Plunger pump 9 is arranged outside gear pump 10, and 9 oil outlet of plunger pump is connect by repairing pipeline 8 with hydraulic cylinder 7 For the intracavitary repairing of oil supply；

And plunger pump 14, be arranged outside gear pump 10,14 oil outlet of plunger pump also by repairing pipeline 8 with it is hydraulic The connection of cylinder 7 is used for the intracavitary repairing of oil supply.

Plunger pump 9 and plunger pump 14 include that setting is intracorporal in shell:

Cam 11, cam 11 are set on main shaft 29, and main shaft 29 is arranged in 12 cabinet of crankcase；

Tapered roller bearing 20,20 side of tapered roller bearing and 11 1 side contacts of cam, tapered roller bearing 20 are another Side and 31 1 side contacts of bearing block；

Bearing block 31, bearing block 31 are used to support and push and pull tapered roller bearing 20；

Block 21 is pushed and pulled, push-and-pull block 21 then leans on screw 23 and screw 26 to push and pull bearing block 31, and the axial movement of cam makes column Plug pump 9 and plunger pump 14 and the phase difference of piston 2 change, to change repairing opportunity and have adjusted gas flow.

Plunger rod 19,19 end of plunger rod are contacted with cam 11；

Plunger rod 27,27 end of plunger rod are contacted with cam 11；

Plunger 32, plunger 32 are connected on plunger rod 19, and cam 11 drives plunger 32 to do reciprocal fortune by plunger rod 19 It is dynamic；

And plunger 28, plunger 28 are connected on plunger rod 27, cam 11 drives plunger 28 to do reciprocal fortune by plunger rod 27 It is dynamic.

It further include spill valve 17；It is provided with spill valve 17 on the hydraulic cylinder 7 of 6 lower section of supporting plate, is distributed on supporting plate 6 Multiple oil guiding holes 18, oil guiding hole 18 connect with 17 entrance of spill valve by oil duct, spill valve 17 is exported through oil return line 16 Connect 15 lower box of crankcase.

Cover board 5 with vaulted inner surface and the connection of the supporting plate 6 with domed surface form cavity, cover board 5 and diaphragm 1 it Between constitute membrane cavity, oil pocket is constituted between supporting plate 6 and diaphragm 1, oil pocket is connected to 7 inner cavity of hydraulic cylinder；It is provided on cover board 5 and membrane cavity The exhaust valve 3 and intake valve 4 of connection.Crank link mechanism is provided in 15 lower box of crankcase, crank link mechanism driving is lived Plug 2 moves reciprocatingly.

Certainly, use one or more plunger pump can be generally to take two plunger pumps.And two plunger pumps The words repairing time is exactly to leave lower dead center close to lower dead center and just fastly, and such effect is best.And it is axial when multiple plunger pumps arrangement Not point-blank.

The principles of the present invention are as follows: when main shaft 29 rotates, cam 11 drives plunger pump 9 and plunger pump 14 past with doing Multiple movement, so that the repairing into oil pocket when main shaft 29 rotates a circle of each plunger pump is primary.Oil in crankcase 15 passes through suction After oil pipe line 13 enters the pressurization of gear pump 10, then through plunger pump 9 and the further pressurization of plunger pump 14, passes through repairing pipeline 8 and enter Repairing is carried out into hydraulic cylinder 7；Oil can flow out spill valve 17 after reaching setting pressure in oil cylinder, then flow back to through oil return line 16 Crankcase 15.

Referring to figs. 2 and 3, the gas flow adjustment structure in the diaphragm type compressor of the utility model, with cam 11, tapered roller bearing 20, bearing block 31, push-and-pull block 21, gland 22, screw 23, connecting plate 24, stud 25, screw 26, handwheel 12.The gas flow adjustment structure of the phase difference between driving cam 11 and main shaft 29 is provided on the shell of plunger pump；Gas Flow adjusting structure includes: gland 22, and gland 22 is connect with the shell of plunger pump；It has open mounting hole on shell, has pushed and pulled block 21 It is arranged in mounting hole, gland 22 is enclosed in outside mounting hole；At least two screws 23,23 one end of screw and push-and-pull block 21 connect It connects, the other end passes through gland 22 and connect with connecting plate 24；Stud 25,25 one end of stud are connect with gland 22, and the other end, which passes through, to be connected Fishplate bar 24 is connect with handwheel 12.The scale mark for adjusting rotational angle is provided on handwheel 12.

The cam 11 and main shaft 29 couple, and specially cam 11 is set in 29 end of main shaft, cam 11, taper roller axis It holds 20, bearing block 31, push-and-pull block 21, gland 22 and sequentially coaxially arranges that 20 inner ring of tapered roller bearing and main shaft 29 cooperate, push away Pulling block 21 is used to adjust the axial position of cam 11.

Drive the first plunger pump 9 and the second plunger pump 14 cam 11 and crankshaft 29 connect, by push-and-pull block 21 realize with 29 relative axial position of crankshaft is adjustable.

Cam 11, tapered roller bearing 20, bearing block 31 and push-and-pull block 21 it is coaxially arranged, 20 inner ring of tapered roller bearing with Main shaft 29 cooperates, and push-and-pull block 21 is used to adjust the axial position of cam 11.

Referring to fig. 4, when compressor is run, with the rotation of main shaft 26, cam 11 passes through the first plunger rod 19 and the respectively Two plunger rods 27 drive plunger 30 and plunger 28 to do periodic reciprocating motion.Phase difference between cam 11 and main shaft 29 can lead to Rotation hand wheel 12 is crossed to realize step-less adjustment.

Referring to fig. 4, Fig. 5 and Fig. 6, cam 11 and main shaft 29 design in radial directions key 34, and cam 11 is set in master On axis 29；Therefore the rotation of main shaft 29 will drive the rotation of cam 11.Cam 11 includes columnar cam body, on cam body It is provided with spiral helicine convex body 33, the key 34 for connecting with main shaft 29 is provided in cam body.

Referring to Fig. 7, bearing block 31 and push-and-pull block 21 cooperate, and it is convex that the side of bearing block 31 is provided with non-circular connection Body 35 pushes and pulls the link slot 36 for being provided on block 21 and cooperating with the connection convex body 35.Preferably, the outer four directions of bearing block 31 The interior tetragonal of structure and push-and-pull block 21 is mutually locked, and prevents from rotating.Certainly other can prevent the structure of rotation can be with.

The utility model also provides a kind of flow rate adjusting method of diaphragm type compressor, comprising the following steps: when main shaft rotates, Cam drives plunger with moving reciprocatingly also by plunger rod, thus plunger pump repairing into oil pocket when main shaft rotates a circle Once.

It is related with the axial position of cam 11 to start the phase difference that repairing moment and diaphragm reach the limit of the position moment；Cam 11, in the axial direction toward when crankcase movement, drive push-and-pull block 21 to promote by screw 23 and 25 structure of screw；Cam 11 is in axis It when being moved on direction away from crankcase 15, is then moved by the elastic force of spring 30 toward home position, and drives push-and-pull block 21 simultaneously It resets.Therefore when machine operation, 23 structure of connecting plate 24 and screw can then be passed through by rotation hand wheel 12 outside casing It adjusts the axial movement of push-and-pull block 21 and changes the axial position of cam 11, to change the first plunger pump 9 and the second plunger Phase difference between pump 14 and piston 2, realizes the step-less adjustment of gas flow under not shutdown status.

After oil in its crankcase 15 enters the pressurization of gear pump 10 by inlet line 13, part oil is through the first plunger pump 9 And the further pressurization of the second plunger pump 14, it is entered by repairing pipeline 8 and carries out repairing in hydraulic cylinder 7, oil reaches in oil cylinder Spill valve 17 can be flowed out after setting pressure, then flows back to crankcase 15 through oil return line 16.In the structure, piston 2 is transported to lower dead center During dynamic, by changing the repairing opportunity of the first plunger pump 9 and the second plunger pump 14, control oily in-cylinder pressure and rise to gas The angular position of cavity pressure is compressed, to control the volume in final position and gas compression chamber that diaphragm moves downward, is realized Diaphragm type compressor gas flow is adjusted.

In the structure of the utility model after the relative axial position of cam and main shaft is adjusted, start repairing moment and film The phase difference that piece reaches the limit of the position moment is also fixed therewith.When compressor is run, handwheel is screwed in machine exterior, then can be passed through Block is pushed and pulled to change the relative axial position of cam and main shaft and the phase difference of repairing.When main shaft rotates, cam passes through plunger Bar drives plunger to move reciprocatingly, so that can to start repairing at a certain position primary for plunger pump when main shaft rotates a circle.This reality With the novel repairing opportunity by adjusting plunger pump, the stepless-adjustment of the diaphragm type compressor gas flow in machine operation is realized Section, when can solve existing diaphragm type compressor repairing the problem of poor inspiration, while it is more convenient, economical, reduce energy consumption.

Although being described above in conjunction with specific embodiment of the attached drawing to the utility model, the utility model is not It is confined to above-mentioned specific embodiment, above-mentioned specific embodiment is only schematical, directiveness rather than limits Property.Those skilled in the art under the enlightenment of this specification, are protected in the claim for not departing from the utility model In the case where the range of shield, a variety of forms can also be made, these belong to the column of the utility model protection.

Claims (9)

1. a kind of diaphragm type compressor characterized by comprising

Part of cylinder block；

Crankcase (15), crankcase (15) upper box are connect with part of cylinder block；

Gear pump (10), gear pump (10) setting pass through inlet line (13) and bent in crankcase (15) side, gear pump (10) The connection of axle box (15) lower box；

And at least one plunger pump, plunger pump setting is external in gear pump (10), and plunger pump and gear pump (10) are connected by oil circuit It is logical；The oil outlet of plunger pump is connect with hydraulic cylinder (7) by repairing pipeline (8) for the intracavitary repairing of oil supply；

The plunger pump includes that setting is intracorporal in shell:

Cam (11), cam (11) are set on the multi-diameter shaft of main shaft (29) end, and main shaft (29) is arranged in crankcase (15) case In vivo；Spring (30) are provided between cam (11) and multi-diameter shaft end face；

Bearing (20), bearing (20) side and (11) one side contacts of cam, bearing (20) other side is flanked with bearing block (31) one Touching, and bearing (20) and bearing block (31) are relatively unrotatable；

It pushes and pulls block (21), push-and-pull block (21) is connect with bearing block (31) other side, for adjusting the axial position of cam (11)；

Plunger rod, plunger boom end are contacted with cam (11)；

Plunger, plunger are connected on plunger rod, and cam (11) drives plunger to move reciprocatingly by plunger rod.

2. diaphragm type compressor according to claim 1, which is characterized in that the cam (11) includes columnar cam sheet Body is provided with spiral helicine convex body (33) on cam body, be provided in cam body for and main shaft (29) connection key (34)。

3. diaphragm type compressor according to claim 1, which is characterized in that the side of the bearing block (31) is provided with non- Circular connection convex body (35) pushes and pulls the link slot (36) being provided on block (21) with the connection convex body (35) cooperation.

4. diaphragm type compressor according to claim 1, which is characterized in that the plunger pump be two, respectively first Plunger pump (9) and the second plunger pump (14), the first plunger pump (9) include the first plunger rod (19) and the first plunger (32), second Plunger pump (14) includes the second plunger rod (27) and the second plunger (28)；

First plunger rod (19), the first plunger rod (19) end are contacted with cam (11)；

Second plunger rod (27), the second plunger rod (27) end are contacted with cam (11)；First plunger rod (19) and the second plunger Bar (27) is not coaxially disposed；

First plunger (32), the first plunger (32) are connected on the first plunger rod (19), and cam (11) passes through the first plunger rod (19) the first plunger (32) are driven to move reciprocatingly；

And second plunger (28), the second plunger (28) are connected on the second plunger rod (27), cam (11) passes through the second plunger rod (27) the second plunger (28) are driven to move reciprocatingly.

5. diaphragm type compressor according to claim 1, which is characterized in that be provided with driving on the shell of the plunger pump The gas flow adjustment structure of phase difference between cam (11) and main shaft (29)；The gas flow adjustment structure includes:

Gland (22), gland (22) are connect with the shell of plunger pump；Mounting hole is offered on shell, push-and-pull block (21) setting is being pacified It fills in hole, gland (22) is enclosed in outside mounting hole；

At least two screws (23), screw (23) one end are connect with push-and-pull block (21), and the other end passes through gland (22) and connecting plate (24) it connects；

Stud (25), stud (25) one end are connect with gland (22), and the other end passes through connecting plate (24) and connect with handwheel (12).

6. diaphragm type compressor according to claim 5, which is characterized in that be provided on the handwheel (12) for adjusting The scale mark of rotational angle.

7. diaphragm type compressor according to claim 1, which is characterized in that

The part of cylinder block includes diaphragm (1), hydraulic cylinder (7), cover board (5) and supporting plate (6)；Diaphragm (1) periphery is fastened on lid Between plate (5) and supporting plate (6), membrane cavity and oil pocket are formed；Supporting plate (6) and diaphragm (1) surround hydraulic cylinder (7)；With vaulted interior table The cover board (5) in face and with domed surface supporting plate (6) connection form cavity, constitute membrane cavity between cover board (5) and diaphragm (1), Oil pocket is constituted between supporting plate (6) and diaphragm (1), oil pocket is connected to hydraulic cylinder (7) inner cavity；It is provided on cover board (5) and connects with membrane cavity Logical exhaust valve (3) and intake valve (4).

8. diaphragm type compressor according to claim 7, which is characterized in that further include spill valve (17)；

It is provided with spill valve (17) on hydraulic cylinder (7) below the supporting plate (6), supporting plate is dispersed with multiple oil guiding holes on (6) (18), oil guiding hole (18) is connect by oil duct with spill valve (17) entrance, and spill valve (17) outlet is connected by oil return line (16) Connect crankcase (15) lower box.

9. diaphragm type compressor according to claim 1, which is characterized in that be provided in described crankcase (15) lower box Crank link mechanism, crank link mechanism driving piston (2) move reciprocatingly.