CN113187705A

CN113187705A - Main shaft direct-drive two-stage booster oil pump

Info

Publication number: CN113187705A
Application number: CN202110458945.8A
Authority: CN
Inventors: 张会明; 张超; 邢子义; 李殿赟
Original assignee: Yantai Dongde Hydrogen Energy Technology Co Ltd
Current assignee: Yantai Dongde Hydrogen Energy Technology Co Ltd
Priority date: 2021-04-27
Filing date: 2021-04-27
Publication date: 2021-07-30

Abstract

A main shaft direct-drive two-stage booster oil pump is characterized in that a diaphragm compressor comprises a diaphragm head part and a crankcase, wherein the crankcase is connected with the diaphragm head part through a connecting body; the booster oil pump comprises a primary oil injection booster pump and a secondary oil supplement booster pump, and the primary oil injection booster pump and the secondary oil supplement booster pump are sequentially sleeved on the crankshaft; the first-stage oil injection booster pump is used for providing hydraulic oil for the crankcase to compress the membrane head part to do work; the secondary oil-supplementing booster pump is used for supplementing oil for the lost oil in the motion process of the piston and is used for supplementing oil for a piston pressure oil cavity in the membrane head part. The diaphragm compressor is also provided with an oil radiator, the oil radiator is a water-cooling radiator, and the water-cooling radiator comprises an oil-cooling oil outlet pipe and an oil-cooling oil inlet pipe. The invention adopts the coaxial direct-drive two-stage booster oil pump of the crankshaft of the diaphragm compressor, does not need additional drive, has compact structure, can realize the accurate control of the oil injection phase of the oil pump and the oil piston phase of the compressor, and improves the reliability.

Description

Main shaft direct-drive two-stage booster oil pump

Technical Field

The invention relates to the technical field of diaphragm compressors, in particular to a main shaft direct-drive two-stage booster oil pump.

Background

A hydraulic oil liquid supplementing system of a diaphragm compressor is one of key structures for ensuring the normal operation of the diaphragm compressor. When the machine runs, hydraulic oil in the oil cylinder of the diaphragm compressor inevitably leaks through the piston ring, and the result is equal to the reduction of the piston stroke, so that when the piston reaches the outer dead center, the diaphragm cannot be attached to the upper supporting plate of the cylinder cover. Leakage occurs at each revolution of the machine, so as the running time increases, the hydraulic oil in the hydraulic cylinder is less and less, the clearance volume in the diaphragm cavity is larger and larger, and finally, the compressor can not suck gas any more and loses working capacity.

Therefore, in the diaphragm compressor, an oil supplementing device is required in addition to the conventional oil injection pump body;

the commonly adopted oil supplement adjusting method of the diaphragm compressor at present mainly comprises rotating speed adjustment and bypass adjustment. In the rotation speed regulation, the rotation speed of a driving machine is changed by adopting an inverter for the regulation mode of the motor. However, when the frequency conversion is performed, the impact on the power grid is large, the machine body is easy to vibrate, chain parking is caused, the abrasion of moving parts is increased, and the machine body cannot work under low load for a long time. Meanwhile, the frequency converter is expensive, and the cost is increased. The bypass regulation is mainly to make the surplus air exhausted from the unit flow back to the inlet of the unit through a bypass valve in the pipeline to meet the load requirement of production. But also has great disadvantage in the aspect of energy consumption, the bypass adjustment does not change the original compression process of the compressor, the redundant return gas is still compressed, and the power consumption of the compressor is not reduced, so that the compressor does a lot of useless work, and a great amount of energy is wasted.

In the prior art, a diaphragm compressor usually adopts an external oil pump and a special oil pump motor during working, the external oil pump is driven to operate by the oil pump motor, and the oil is continuously pumped into a crankcase to compress a diaphragm; the operation method causes the diaphragm compressor to have larger integral volume, more parts and components, larger space occupation during assembly, and complex structure and poor tightness of the steps of the method.

Disclosure of Invention

The invention aims to provide a main shaft direct-drive two-stage booster oil pump, wherein a diaphragm compressor comprises a diaphragm head part and a crankcase, and the crankcase is connected with the diaphragm head part through a connecting body; the booster oil pump comprises a primary oil injection booster pump and a secondary oil supplement booster pump, and the primary oil injection booster pump and the secondary oil supplement booster pump are sequentially sleeved on the crankshaft;

the first-stage oil injection booster pump is used for providing hydraulic oil for the crankcase to compress the membrane head part to do work;

the secondary oil-supplementing booster pump is used for supplementing oil for the lost oil in the motion process of the piston and is used for supplementing oil for a piston pressure oil cavity in the membrane head part.

Further, the one-level oiling booster pump and the second-level oil supplementing booster pump are connected and are arranged on one side of the crankcase.

Further, diaphragm compressor still is equipped with oil radiator, oil radiator is water-cooling radiator, water-cooling radiator includes that oil is cold to go out oil pipe and oil is cold to advance oil pipe.

Furthermore, the primary oil injection booster pump is a cycloid pump which is sleeved on the crankshaft and comprises an oil inlet cavity, a pump oil cavity and an oil outlet cavity, and the pump oil cavity is arranged on one side of the oil inlet cavity and one side of the oil outlet cavity and is respectively communicated with the oil inlet cavity and the oil outlet cavity;

the pump oil cavity is internally provided with an eccentric sleeve, a driven gear and a driving gear which are matched with each other, the driven gear is fixedly connected with the eccentric sleeve, the driving gear is fixedly connected with a crankshaft of the diaphragm compressor, and the driven gear and the eccentric sleeve are parallel to the axis of the driving gear.

Further, the primary oil injection booster pump oil injection process is as follows: the crankshaft drives the driving gear to rotate, hydraulic oil is sucked into the oil injection and oil inlet pipeline from the oil radiator through the oil cooling oil outlet pipe and is injected into the crankcase, the hydraulic oil is compressed and pushed to the piston pressure oil cavity in the membrane head part through the forward pushing of the piston, the hydraulic oil enters the crankcase through the oil injection and oil return pipeline arranged on the connecting body through the backward pushing of the piston, and the hydraulic oil returns to the oil radiator through the oil cooling oil inlet pipe.

Further, the second grade booster pump of mending oil is adjustable plunger pump, adjustable plunger pump includes: the eccentric wheel cavity is communicated with the plunger cavity;

an eccentric wheel is arranged in the eccentric wheel cavity and sleeved on the crankshaft;

a plunger and an adjustable oil cylinder are arranged in the plunger cavity, one end of the plunger is abutted against the eccentric wheel, and the other end of the plunger is connected with a return spring arranged in the adjustable oil cylinder; the adjustable oil cylinder extends into the plunger cavity from the outer side of the adjustable plunger pump, the adjustable oil cylinder is provided with an oil inlet channel, and the adjustable oil cylinder and the adjustable plunger pump are locked through an adjusting nut.

Further, the adjustable plunger pump includes at least one plunger cavity.

Furthermore, the adjustable plunger pump comprises two plunger cavities, the eccentric wheel cavity is arranged between the two plunger cavities, and one plunger cavity is a standby cavity.

Further, the oil supplementing process of the secondary oil supplementing booster pump is as follows: when the diaphragm compressor sucks air, the pressure of hydraulic oil in a piston oil pressing cavity in the diaphragm head part is gradually reduced along with the backward movement of the piston, and at the moment, the piston backward crankshaft drives the eccentric wheel to push the plunger forwards to push the hydraulic oil in the adjustable oil cylinder out to enter the piston oil pressing cavity in the diaphragm head part through the oil supplementing and injecting pipeline; when the compressor exhausts, the pressure of hydraulic oil in a piston pressure oil cavity in the membrane head part gradually rises along with the forward movement of the piston, the piston moves forward at the moment, the crankshaft drives the eccentric wheel to rotate backwards, the hydraulic oil in the piston pressure oil cavity in the membrane head part is injected into an oil cooling oil inlet pipe through an overflow valve arranged on the membrane head part through an oil supplementing and returning pipeline to enter the oil radiator, the return spring pushes the plunger to retreat to suck the hydraulic oil in the crankcase into the plunger cavity, and when the plunger retreats to the maximum value, the oil in the plunger cavity enters the adjustable oil cylinder through the oil inlet channel to finish oil injection.

Furthermore, the oil spilling valve is connected with a plurality of oil guide holes distributed on the piston oil pressing cavity.

The invention has the beneficial effects that:

(1) the invention adopts the coaxial direct-drive two-stage booster oil pump of the crankshaft of the diaphragm compressor, does not need additional drive, has compact structure, can realize the accurate control of the oil injection phase of the oil pump and the oil piston phase of the compressor, and improves the reliability.

(2) The diaphragm compressor is provided with a structure for regulating gas flow, namely a plunger pump, and an oil supplementing device is arranged on the diaphragm compressor for supplementing oil, and particularly, the plunger pump is used for supplementing oil to a hydraulic cylinder. The problem of oil in the pneumatic cylinder leaks through the piston ring, leads to the compressor can not suck gas again is solved. The hydraulic cylinder can have enough oil quantity by supplementing oil timely and continuously. So that the stroke of the piston is not affected and the compressor can work normally and continuously. The invention can solve the problem of insufficient air suction during oil supplement of the existing diaphragm compressor by adjusting the oil supplement time of the plunger pump and adjusting the oil supplement amount of the plunger pump, and is more economical and reduces energy consumption. The invention has simple structure and convenient installation, and the air quantity discharged by the unit does not flow back to the inlet, thereby avoiding the waste of energy.

(3) The invention adopts the plunger pump structure to supplement oil, adjusts the relative position between the plunger pump structure and the crankshaft by rotating the eccentric wheel, and can change the phase difference between the time of starting oil supplement and the time of reaching the limit position of the diaphragm, thereby realizing the stepless regulation of gas flow by adjusting the oil supplement time of the plunger pump.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a cross-sectional view of the plunger booster pump of the present invention;

FIG. 3 is a cross-sectional view of the gerotor pump of the present invention;

fig. 4 is a view of the internal structure of the oil chamber of the gerotor pump of the present invention.

Reference numerals

Membrane head part (1), crankcase (2), connector (3), one-level oiling booster pump (4), oil feed chamber (41), pump oil chamber (42), oil outlet chamber (43), eccentric bushing (44), driven gear (45), driving gear (46), second grade oil supplementing booster pump (5), eccentric wheel chamber (51), plunger chamber (52), eccentric wheel (53), plunger (54), adjustable hydro-cylinder (55), reset spring (56), oil inlet channel (57), adjusting nut (58), oil radiator (6), oil cooling oil pipe (61), oil cooling oil inlet pipe (62), oil filling oil inlet pipeline (7), oil filling oil return pipeline (8), oil supplementing oil return pipeline (9), oil supplementing oil return pipeline (10), oil spill valve (11).

Detailed Description

The following detailed description of the present invention will be made in conjunction with the accompanying drawings, but the following examples are merely illustrative of preferred embodiments, which are provided to assist understanding of the present invention, and are not to be construed as limiting the present invention.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout.

The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1

Referring to fig. 1, the main shaft direct-drive two-stage booster oil pump is characterized in that a diaphragm compressor comprises a diaphragm head part 1 and a crankcase 2, wherein the crankcase 2 is connected with the diaphragm head part 1 through a connecting body 3; the booster oil pump comprises a primary oil injection booster pump 4 and a secondary oil supplement booster pump 5, and the primary oil injection booster pump 4 and the secondary oil supplement booster pump 5 are sequentially sleeved on the crankshaft and are directly driven by the crankshaft;

the first-stage oil injection booster pump 4 is used for providing hydraulic oil for the crankcase 2 to compress the membrane head part 1 to do work;

and the secondary oil supplementing booster pump 5 is used for supplementing oil for the piston pressure oil cavity in the membrane head part 1 in order to compensate the oil loss in the piston motion process. The first-stage oil injection booster pump 4 and the second-stage oil supplement booster pump 5 are connected and are arranged on one side of the crankcase 2.

The diaphragm compressor is also provided with an oil radiator 6, the oil radiator 6 is a water-cooling radiator, and the water-cooling radiator comprises an oil cooling oil outlet pipe 61 and an oil cooling oil inlet pipe 62.

And an overflow valve 11 is arranged on the membrane head part 1, and the overflow valve 11 is connected with a plurality of oil guide holes distributed on the piston pressure oil cavity.

Example 2

Referring to fig. 2, the primary oil injection booster pump 4 is a cycloid pump, the cycloid pump is sleeved on a crankshaft, the cycloid pump comprises an oil inlet cavity 41, a pump oil cavity 42 and an oil outlet cavity 43, and the pump oil cavity 42 is arranged on one side of the oil inlet cavity 41 and one side of the oil outlet cavity 43 and is respectively communicated with the oil inlet cavity 41 and the oil outlet cavity 43;

the pump oil cavity 42 is internally provided with an eccentric sleeve 44, a driven gear 45 and a driving gear 46 which are matched with each other, the driven gear 45 is fixedly connected with the eccentric sleeve 44, the driving gear 46 is fixedly connected with a crankshaft of the diaphragm compressor, and the driven gear 45 and the eccentric sleeve 44 are parallel to the axis of the driving gear 46.

Example 3

Referring to fig. 3 and 4, the two-stage oil-replenishing booster pump 5 is an adjustable plunger pump including: the eccentric wheel cavity 51 and the plunger cavity 52, wherein the eccentric wheel cavity 51 is communicated with the plunger cavity 52;

an eccentric wheel 53 is arranged in the eccentric wheel cavity 51, and the eccentric wheel 53 is sleeved on the crankshaft;

a plunger 54 and an adjustable oil cylinder 55 are arranged in the plunger cavity 52, one end of the plunger 54 is abutted against the eccentric wheel 53, and the other end of the plunger 54 is connected with a return spring 56 arranged in the adjustable oil cylinder 55; the adjustable oil cylinder 55 extends into the plunger cavity 52 from the outer side of the adjustable plunger pump, the adjustable oil cylinder 55 is provided with an oil inlet channel 57, and the adjustable oil cylinder 55 and the adjustable plunger pump are locked through an adjusting nut 58.

The adjustable plunger pump comprises two plunger cavities 52, the eccentric wheel cavity 51 is arranged between the two plunger cavities 52, and one plunger cavity 52 is a standby cavity. Can be used simultaneously or can be used for changing the oil outlet direction.

The working principle is that

When the diaphragm compressor operates, the motor drives the piston through the crankshaft connecting rod mechanism, the piston pushes the diaphragm to compress gas through hydraulic oil, and the gas jacks up the exhaust valve when the pressure in the diaphragm cavity reaches the exhaust pressure; when the piston moves downwards from the upper dead point, the diaphragm moves along with the oil to the direction of the balance position, so that the volume of the diaphragm cavity is increased, the air inlet valve is jacked open, and air starts to be sucked into the diaphragm cavity.

The 4 oiling processes of the primary oiling booster pump are as follows: the crankshaft drives the driving gear 46 to rotate, so that hydraulic oil is sucked from the oil radiator 6 into the oil filling and feeding pipeline 7 through the oil cooling and discharging pipe 61 and is injected into the crankcase 2, the hydraulic oil is compressed and pushed to the piston pressure oil chamber in the membrane head part 1 through the forward pushing of the piston, the hydraulic oil enters the crankcase 2 through the oil filling and returning pipeline 8 arranged on the connecting body 3 through the backward pushing of the piston, and the hydraulic oil returns to the oil radiator 6 through the oil cooling and feeding pipe 62.

When the machine is running, oil in the piston oil pressing cavity inevitably leaks through the piston ring. Therefore, the stroke of the piston is reduced, and when the piston reaches the outer dead point, the diaphragm cannot be attached to the cover plate, so that the clearance volume in the diaphragm cavity is increased, and finally, the compressor cannot suck gas any more and loses working capacity.

And the secondary oil supplementing booster pump 5 is used for supplementing oil: when the diaphragm compressor sucks air, the pressure of hydraulic oil in a piston oil pressing cavity in the diaphragm head component 1 is gradually reduced along with the backward movement of the piston, and at the moment, the piston backward crankshaft drives the eccentric wheel 53 to push the plunger 54 forward to push the hydraulic oil in the adjustable oil cylinder 55 out to enter the piston oil pressing cavity in the diaphragm head component 1 through the oil supplementing and injecting pipeline 9; when the compressor exhausts, the pressure of the hydraulic oil in the piston pressure oil chamber in the membrane head part 1 gradually rises along with the forward movement of the piston, at this time, the piston advances, the crankshaft drives the eccentric wheel 53 to rotate backwards, the hydraulic oil in the piston pressure oil chamber in the membrane head part 1 is injected into the oil cooling oil inlet pipe 62 through the overflow valve 11 arranged on the membrane head part 1 through the oil supplementing and returning pipeline 10 to enter the oil radiator 6, the return spring 56 pushes the plunger 54 to retreat to suck the hydraulic oil in the crankcase 2 into the plunger chamber 52, and when the plunger 54 retreats to the maximum value, the oil in the plunger chamber 52 enters the adjustable oil cylinder 55 through the oil inlet channel 57 to finish the oil injection.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, which falls into the protection scope of the present invention.

Claims

1. A main shaft direct-drive two-stage booster oil pump is characterized in that a diaphragm compressor comprises a diaphragm head part (1) and a crankcase (2), wherein the crankcase (2) is connected with the diaphragm head part (1) through a connecting body (3); the method is characterized in that: the booster oil pump comprises a primary oil injection booster pump (4) and a secondary oil supplement booster pump (5), the primary oil injection booster pump (4) and the secondary oil supplement booster pump (5) are connected and are arranged on one side of the crankcase (2), and the primary oil injection booster pump (4) and the secondary oil supplement booster pump (5) are sequentially sleeved on the crankshaft;

the primary oil injection booster pump (4) is used for providing hydraulic oil for the crankcase (2) to compress the membrane head component (1) to do work;

the secondary oil-supplementing booster pump (5) is used for supplementing oil for the piston pressure oil cavity in the membrane head part (1) in order to compensate the oil loss in the piston movement process;

the diaphragm compressor is also provided with an oil radiator (6), the oil heat exchanger (6) is a water-cooling heat exchanger, and the water-cooling heat exchanger comprises an oil cooling oil outlet pipe (61) and an oil cooling oil inlet pipe (62).

2. The main shaft direct-drive two-stage booster oil pump as claimed in claim 1, characterized in that: the primary oil injection booster pump (4) is a cycloid pump, the cycloid pump is sleeved on a crankshaft and comprises an oil inlet cavity (41), a pump oil cavity (42) and an oil outlet cavity (43), and the pump oil cavity (42) is arranged on one side of the oil inlet cavity (41) and one side of the oil outlet cavity (43) and is respectively communicated with the oil inlet cavity (41) and the oil outlet cavity (43);

be equipped with in pump oil chamber (42) eccentric cover (44) of mutually supporting, driven gear (45) and driving gear (46), driven gear (45) and eccentric cover (44) fixed connection, driving gear (46) and diaphragm compressor bent axle fixed connection, driven gear (45) and eccentric cover (44) with the axle center of driving gear (46) is parallel.

3. The main shaft direct-drive two-stage booster oil pump as claimed in claim 2, characterized in that: the oil injection process of the primary oil injection booster pump (4) is as follows: the crankshaft drives the driving gear (46) to rotate, hydraulic oil is sucked into the oil injecting and feeding pipeline (7) from the oil radiator (6) through the oil cooling oil outlet pipe (61) and is injected into the crankcase (2), the hydraulic oil is compressed and pushed to the piston pressure oil cavity in the membrane head part (1) through the forward pushing of the piston, the hydraulic oil enters the crankcase (2) through the oil injecting and feeding pipeline (8) arranged on the connecting body (3) through the retreating of the piston, and the hydraulic oil returns to the oil heat exchanger (6) through the oil cooling oil inlet pipe (62).

4. The main shaft direct-drive two-stage booster oil pump as claimed in claim 1, characterized in that: second grade benefit oil booster pump (5) are adjustable plunger pump, adjustable plunger pump includes: the eccentric wheel cavity (51) and the plunger cavity (52), wherein the eccentric wheel cavity (51) is communicated with the plunger cavity (52);

an eccentric wheel (53) is arranged in the eccentric wheel cavity (51), and the eccentric wheel (53) is sleeved on the crankshaft;

a plunger (54) and an adjustable oil cylinder (55) are arranged in the plunger cavity (52), one end of the plunger (54) is abutted against the eccentric wheel (53), and the other end of the plunger is connected with a return spring (56) arranged in the adjustable oil cylinder (55); adjustable hydro-cylinder (55) are followed the adjustable plunger pump outside stretch in plunger chamber (52), adjustable hydro-cylinder (55) are equipped with oil feed passageway (57), adjustable hydro-cylinder (55) with lock through adjusting nut (58) between the adjustable plunger pump.

5. The main shaft direct-drive two-stage booster oil pump as claimed in claim 4, characterized in that: the adjustable plunger pump includes at least one plunger cavity (52).

6. The main shaft direct-drive two-stage booster oil pump as claimed in claim 4, characterized in that: the adjustable plunger pump comprises two plunger cavities (52), the eccentric wheel cavity (51) is arranged between the two plunger cavities (52), and one plunger cavity (52) is a standby cavity.

7. The main shaft direct-drive two-stage booster oil pump as claimed in claim 4, characterized in that: the oil supplementing process of the secondary oil supplementing booster pump (5) is as follows: when the diaphragm compressor sucks air, the pressure of hydraulic oil in a piston oil pressing cavity in the diaphragm head component (1) is gradually reduced along with the backward movement of the piston, and at the moment, the piston backward crankshaft drives the eccentric wheel (53) to push the plunger (54) forwards to push the hydraulic oil in the adjustable oil cylinder (55) out to enter the piston oil pressing cavity in the diaphragm head component (1) through the oil supplementing and injecting pipeline (9); when the compressor exhausts, the pressure of hydraulic oil in a piston pressure oil cavity in the membrane head part (1) is gradually increased along with the forward movement of the piston, the piston moves forward, the crankshaft drives the eccentric wheel (53) to rotate backwards, the hydraulic oil in the piston pressure oil cavity in the membrane head part (1) is injected into an oil cold oil inlet pipe (62) through an overflow valve (11) arranged on the membrane head part (1) through an oil supplementing and returning pipeline (10) and enters the oil radiator (6), a return spring (56) pushes a plunger (54) to retreat to suck the hydraulic oil in the crankcase (2) into a plunger cavity (52), and when the plunger (54) retreats to the maximum value, the oil in the plunger cavity (52) enters the adjustable oil cylinder (55) through an oil inlet channel (57) to finish oil injection.

8. The main shaft direct-drive two-stage booster oil pump as claimed in claim 7, characterized in that: the oil spilling valve (11) is connected with a plurality of oil guide holes distributed on the piston oil pressing cavity.