阅读说明：本技术 一种高低压两级螺杆活塞空压机 (High-low pressure two-stage screw piston air compressor ) 是由 周梦东 于 2021-02-28 设计创作，主要内容包括：本发明涉及空气压缩机设备技术领域,尤其是一种高低压两级螺杆活塞空压机,主要包括螺杆空压机、活塞空压机及高低压工作模式转换装置。所述螺杆空压机用于低压模式,螺杆空压机、活塞空压机一起用于高压模式,在高压模式中,螺杆空压机作为压缩机第一级,活塞空压机作为第二级,高低压工作模式可以根据需要进行转换。本发明结合了两种空压机的技术优点,在高压压缩空气的获得上将比活塞空压机更为节能,并且在对高、低压压缩空气都需求的工作环境中更能达到节能效果。(The invention relates to the technical field of air compressor equipment, in particular to a high-low pressure two-stage screw piston air compressor which mainly comprises a screw air compressor, a piston air compressor and a high-low pressure working mode conversion device. The screw air compressor is used for the low pressure mode, and screw air compressor, piston air compressor are used for the high pressure mode together, and in the high pressure mode, screw air compressor is as compressor primary, and piston air compressor is as the second grade, and high low pressure mode can be changed as required. The invention combines the technical advantages of two air compressors, saves more energy than a piston air compressor in the aspect of obtaining high-pressure compressed air, and can achieve the energy-saving effect in the working environment requiring high-pressure compressed air and low-pressure compressed air.)

1. The utility model provides a high low pressure two-stage screw piston air compressor machine which characterized in that: the air compressor comprises a screw air compressor (1), a piston air compressor (2) and a high-low pressure working mode conversion device, the screw air compressor, the piston air compressor, a driving motor (4), a shell (12) and a cooler (11) are fixed on a base (3), the screw air compressor and the piston air compressor share one driving motor, the screw air compressor and the driving motor are connected by a belt (19), the piston air compressor and the driving motor are connected by a clutch, a compressed air outlet of the screw air compressor is connected with a low-pressure inlet of the cooler, a low-pressure outlet of the cooler is connected with an inlet of a pneumatic control three-way valve (13), two outlets of the pneumatic control three-way valve are respectively connected with an inlet of the piston air compressor and an outlet of the low-pressure compressed air, an outlet of the piston air compressor is connected with a high-pressure inlet of the cooler, a high, a piston air compressor fan (5) is arranged on a front end shaft of the piston air compressor, a clutch is arranged between a driving motor and two shafts of the piston air compressor, the clutch comprises a clutch end cover (8), a pressure rod (9), a spring (20), a pneumatic piston (16), a flywheel (17), a sliding disc (6) and a friction block fixed on the sliding disc, the sliding disc is in spline connection with a transmission shaft (7), an air inlet and exhaust integrated valve (25) is arranged in a cylinder head (14) of the piston air compressor, the air inlet and exhaust integrated valve is composed of a valve seat (26), a valve plate (27), a valve cover (28), a gasket (29) and a bolt (30), an air inlet pipe (15) is inserted into the cylinder head, a sealing ring (1) (31) is arranged between the contact surfaces of the air inlet pipe and the cylinder head, a sealing ring (2) (32) is arranged between the lower end surface of the air inlet pipe and the upper end surface of the, one inlet of the two-position three-way valve is communicated with the atmosphere, the other inlet of the two-position three-way valve is connected with compressed air, and the inlet of the compressed air of the two-position three-way valve is connected with a pipeline between the low-pressure outlet of the cooler and the pneumatic control three-way valve.

2. The air compressor of claim 1, wherein: the air compressor has two kinds of mode, one kind is the low pressure mode, and another kind is the high pressure mode, and during the low pressure mode, only screw compressor produced low pressure compressed air, and during the high pressure mode, screw compressor and piston air compressor move together, and the compressed air that screw compressor produced gets into piston air compressor after the cooler cooling, produces high pressure compressed air by piston air compressor again.

3. The air compressor of claim 1 or 2, wherein: the cooling mode of screw air compressor and piston air compressor is air-cooled, and the cooler divide into two parts, and partly is used for the screw air compressor, and another part is used for the piston air compressor, and the shell overlooks and is "L" type, and the inside screw air compressor cooling duct that is as of shell, piston air compressor and clutch are located the shell outside.

4. The air compressor of any one of the preceding claims, characterized in that: the air inlet and exhaust integrated valve is fixed between a cylinder head and a cylinder body of the piston air compressor through bolts, an air inlet channel and an air exhaust channel are isolated by a sealing ring 1, the air exhaust channel is isolated from the atmospheric environment by a sealing ring 2, an air inlet pipe is fixed on the upper portion of the cylinder head through bolts, and the pretightening force of the bolts forms pressing force on the sealing ring 1 between the lower end face of the air inlet pipe and the upper end face of the air inlet and exhaust integrated valve.

5. The air compressor of any one of the preceding claims, characterized in that: the valve plate in the intake and exhaust integrated valve is Z-shaped, two ends of the valve plate are respectively used as the valve plates of the intake and exhaust port, the valve plate can be exchanged with the air inlet and outlet end surfaces, the valve plate is arranged in the groove of the valve seat, in order to limit the opening degree of the valve plate at the air inlet end, the groove has a certain angle of inclination angle along the center of the valve seat, the valve cover is fixed in the circular groove of the valve seat through bolts, the valve plate is pressed after the valve cover is fixed, a gasket is arranged between the valve cover and the valve seat, the thickness of the gasket is the same as that of the valve plate, the edge of the valve cover is provided with a certain angle of protrusion above each air inlet, in order, can reduce later maintenance work, intake duct, exhaust passage are the round hole, and valve gap middle zone is opened there is the round hole that runs through, and as the intake duct, the disk seat is kept away from the middle zone and is opened there is the round hole that runs through, and as the exhaust passage, the intake duct is the same with the round hole quantity of exhaust passage, and the intake duct is whole in intake pipe lower extreme pipeline internal diameter.

6. The air compressor of any one of the preceding claims, characterized in that: the high-low pressure working mode conversion device comprises electromagnetic valves, two-position three-way valves, a pneumatic control three-way valve and a clutch, wherein the two electromagnetic valves respectively control the two-position three-way valves, the pneumatic control three-way valve and the clutch are respectively controlled by the two-position three-way valves, when the air compressor is in a high pressure mode, the two electromagnetic valves are electrified, the two-position three-way valves change the working positions, compressed air respectively enters a piston sleeve of the pneumatic control three-way valve and a piston sleeve of a pneumatic piston, the clutch is jointed after the compressed air enters the piston sleeve of the pneumatic piston, the piston air compressor starts to operate, the pneumatic control three-way valve changes the working positions after the compressed air enters the piston sleeve of the pneumatic control three-way valve, the compressed air generated by the screw air compressor enters the piston air compressor, the air compressor is switched from the high pressure, a spring in the clutch disengages the clutch.

7. The air compressor of any one of the preceding claims, characterized in that: the driving motor can adopt a heat engine or an electric motor, and the power and the rotating speed of the driving motor are correspondingly increased or reduced along with the switching of the high-low pressure working mode of the air compressor.

8. The air compressor of any one of the preceding claims, characterized in that: the air compressor is used for removing a high-low pressure working mode conversion device, and is directly used as a two-stage high-pressure air compressor, a screw air compressor is used as a first stage, and a piston air compressor is used as a second stage.

Technical Field

The invention relates to the technical field of air compressor equipment, in particular to a high-low pressure two-stage screw piston air compressor.

Background

Present air compressor has extensively been applied to each field, screw air compressor compares in piston air compressor, when output low pressure compressed air, screw air compressor has higher efficiency, maintenance work load still less, consequently in the field that needs low pressure compressed air, screw air compressor is replacing piston air compressor gradually with its advantage, but screw air compressor machine is because its linear characteristics, and be not applicable to high-pressure compressed air's field, consequently a novel two-stage air compressor that combines screw air compressor and piston air compressor will have higher efficiency than traditional piston air compressor in high-pressure compressed air's field, better energy-conserving effect.

Disclosure of Invention

The invention aims to provide an energy-saving air compressor, which can output high-pressure or low-pressure compressed air by a single air compressor according to requirements, and can reduce the later maintenance work of the air compressor, thereby improving the economy of the air compressor.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a high-low pressure two-stage screw piston air compressor which comprises a screw air compressor (1), a piston air compressor (2) and a high-low pressure working mode conversion device.

The screw air conveyor, the piston air compressor, the driving motor (4), the shell (12) and the cooler (11) in the air compressor are fixed on the base (3).

The screw air compressor and the piston air compressor share one driving motor, the screw air compressor and the driving motor are connected through a belt (19), the piston air compressor and the driving motor are connected through a clutch, a compressed air outlet of the screw air compressor is connected with a low-pressure inlet of a cooler, the low-pressure outlet of the cooler is connected with an inlet of a pneumatic control three-way valve (13), and two outlets of the pneumatic control three-way valve are respectively connected with the inlet of the piston air compressor and the outlet of the low-pressure compressed air.

A screw air compressor fan (24) in the air compressor is arranged on a tail end shaft of a driving motor, a piston air compressor fan (5) is arranged on a front end shaft of the piston air compressor, and a clutch is arranged between the driving motor and the two shafts of the piston air compressor.

The clutch comprises a clutch end cover (8), a pressure rod (9), a spring (20), a pneumatic piston (16), a flywheel (17), a sliding disc (6) and a friction block fixed on the sliding disc.

An air intake and exhaust integrated valve (25) in the air compressor is arranged in a cylinder head (14) of the piston air compressor and consists of a valve seat (26), a valve plate (27), a valve cover (28), a gasket (29) and a bolt (30).

An air inlet pipe (15) in the air compressor is inserted into the cylinder head, a sealing ring 1 (31) is positioned between the air inlet pipe and the contact surface of the cylinder head, and a sealing ring 2 (32) is positioned between the lower end surface of the air inlet pipe and the upper end surface of the air inlet and exhaust gas collecting valve.

The electromagnetic valve (18) for controlling the high-low pressure working mode of the air compressor is arranged close to the screw air compressor, one inlet of the two-position three-way valve is communicated with the atmosphere, the other inlet of the two-position three-way valve is connected with compressed air, and the inlet of the compressed air of the two-position three-way valve is connected with a pipeline between the low-pressure outlet of the cooler and the pneumatic control three-way.

The air compressor has two working modes, one is a low-pressure mode, the other is a high-pressure mode, during the low-pressure mode, only the screw air compressor generates low-pressure compressed air, during the high-pressure mode, the screw air compressor and the piston air compressor run together, compressed air generated by the screw air compressor enters the piston air compressor after being cooled by the cooler, and then the piston air compressor generates high-pressure compressed air.

The cooling mode of the screw air compressor and the piston air compressor is air cooling, the cooler is divided into two parts, one part is used for the screw air compressor, the other part is used for the piston air compressor, the shell is L-shaped when overlooking, the inside of the shell is used as a cooling air duct of the screw air compressor, and the piston air compressor and the clutch are located outside the shell.

The air inlet and exhaust integrated valve is fixed between a cylinder head and a cylinder body of a piston air compressor through bolts, an air inlet channel and an air exhaust channel are isolated by a sealing ring 1, the air exhaust channel is isolated from the atmospheric environment by a sealing ring 2, an air inlet pipe is fixed on the upper portion of the cylinder head through bolts, and the pretightening force of the bolts forms pressing force on the sealing ring 1 between the lower end face of the air inlet pipe and the upper end face of the air inlet and exhaust integrated valve.

The valve block among the above-mentioned integrated valve that advances to exhaust is "Z" type, the valve block of inlet and exhaust mouth is regarded as respectively at both ends, and the valve block interchangeable advances the exhaust terminal surface, the valve block is installed in the disk seat recess, for the restriction inlet end valve block aperture, the recess prolongs the inclination that there is certain angle at disk seat center, the valve gap passes through the bolt fastening in the circular recess of disk seat, the valve block will be compressed tightly after the valve gap is fixed, the packing ring has been placed between valve gap and the disk seat, the packing ring is the same with valve block thickness, the valve gap edge has the arch of certain angle above every air inlet, for restriction exhaust end valve block aperture, the valve block is changed, the.

The air inlet channel and the air outlet channel in the air inlet and outlet integrated valve are round holes, the middle area of the valve cover is provided with a through round hole, the valve seat is far away from the middle area and is provided with a through round hole as the air inlet channel, the air inlet channel and the air outlet channel are same in number as the air outlet channel, and the air inlet channel is completely arranged in the inner diameter of the pipeline at the lower end of the air inlet pipe.

The high-low pressure working mode conversion device comprises electromagnetic valves, two-position three-way valves, a pneumatic control three-way valve and a clutch, wherein the two electromagnetic valves respectively control the two-position three-way valves, and the two-position three-way valves respectively control the pneumatic control three-way valve and the clutch.

When the air compressor is in a high-pressure mode, the two electromagnetic valves are electrified, the two-position three-way valves change working positions, and compressed air respectively enters the pneumatic control three-way valve piston sleeve and the pneumatic piston sleeve.

After the compressed air enters the piston sleeve of the pneumatic piston, a piston rod in the pneumatic piston extends out, a pressure rod connected with the piston rod moves around a fulcrum, the other end of the pressure rod is in contact with a sliding disc, the sliding disc is in splined connection with a transmission shaft (7), the sliding disc can only move towards the piston air compressor along the transmission shaft after the pressure of the pressure rod is applied to the sliding disc, a friction block on the sliding disc is in contact with a flywheel of the piston air compressor, the clutch is connected, and the piston air compressor starts to operate.

After the compressed air enters the piston sleeve of the pneumatic control three-way valve, the pneumatic control three-way valve changes the working position, and the compressed air generated by the screw air compressor enters the piston air compressor.

After the air compressor is switched to a low-pressure working mode from a high-pressure working mode or is stopped, compressed air in the piston sleeve of the pneumatic control three-way valve and the piston sleeve of the pneumatic piston is released to the atmospheric environment through the two three-way valves, and the spring in the clutch disengages the clutch.

The driving motor can adopt a heat engine and also can adopt an electric motor, and the power and the rotating speed of the driving motor are correspondingly improved or reduced along with the switching of the high-low pressure working mode of the air compressor.

The screw air compressor can adopt an oilless screw air compressor or an oil injection screw air compressor.

The air compressor electric pipeline is arranged in the shell, and the control panel (21) is installed on the inclined surface of the shell.

Drawings

The invention will be further described and illustrated with reference to the accompanying drawings:

FIG. 1 is an overall schematic view of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a top view of the present invention;

FIG. 4 is a schematic view of a cooling air duct of the screw air compressor of the present invention;

FIG. 5 is an exploded view of the integrated intake and exhaust valve of the present invention;

FIG. 6 is a sectional view of the air inlet and outlet passages of the piston air compressor of the present invention;

FIG. 7 is a cross-sectional view of the clutch of the present invention.

In the figure, 1 screw air compressor, 2 piston air compressor, 3 base, 4 driving motor, 5 piston air compressor fan, 6 sliding disc, 7 transmission shaft, 8 clutch end cover, 9 compression bar, 10 fan sleeve, 11 cooler, 12 outer shell, 13 pneumatic control three-way valve, 14 cylinder head, 15 air inlet pipe, 16 pneumatic piston, 17 flywheel, 18 electromagnetic valve, 19 belt, 20 spring, 21 control panel, 22 filter screen, 23 shaft with lubricating oil pump, 24 screw air compressor fan, 25 air inlet and exhaust integrated valve, 26 valve seat, 27 valve sheet, 28 valve cover, 29 gasket, 30 bolt, 31 sealing ring 1, 32 sealing ring 2.

Detailed Description

[ example 1 ]

The air compressor is started in a low-pressure mode, and the driving motor runs. As shown in fig. 2 and 3, the transmission shaft transmits power to the screw air compressor through the belt, the screw air compressor starts to operate, low-pressure compressed air generated by the screw air compressor enters the low-pressure inlet of the cooler, and the cooled low-pressure compressed air is output from the air compressor through the pneumatic control three-way valve. As shown in fig. 4, the screw compressor fan is operated together with the driving motor, air is sucked into the compressor from the outside of the casing through the screen (22), the sucked air first cools the driving motor, then part of the air enters the screw compressor, and finally the heat of the low-pressure compressed air is taken away by the cooler.

[ example 2 ]

The air compressor is started in a high-pressure mode, and the power and the rotating speed of the driving motor are correspondingly improved. The driving motor operates, the solenoid valve is electrified, the inlet of two three-way valves in-connection compressed air communicates with the outlet of two three-way valves, the screw air compressor is in the same low-pressure mode, the low-pressure compressed air generated by the screw air compressor enters the low-pressure inlet of the cooler, the cooled compressed air is output from the low-pressure outlet of the cooler, the compressed air enters the pneumatic control three-way valve piston sleeve and the pneumatic piston sleeve through the two three-way valves, and the compressed air enters the pneumatic control three-way valve in the other way. As shown in fig. 5, 6, and 7, the compressed air pressure gradually increases, the pressure reaches a set value, the pneumatic control three-way valve and the pneumatic piston change the working position, the compressed air enters the piston air compressor from the pneumatic control three-way valve, meanwhile, the clutch is engaged, the piston air compressor operates, the piston air compressor compresses the low-pressure compressed air entering from the air inlet pipe into high-pressure compressed air, the generated high-pressure compressed air enters the high-pressure inlet of the cooler from the cylinder head pipeline of the piston air compressor, and the compressed air after the secondary cooling is output from the high-pressure outlet of the cooler. The cooling mode of the screw air compressor in the high-pressure mode is the same as that in the low-pressure mode, the piston air compressor fan and the piston air compressor run simultaneously, air is accelerated in the piston air compressor fan and then directly enters the cooler, and heat of high-pressure compressed air is taken away.