CN107476975B

CN107476975B - Double-cylinder circulating suction type fan of road sweeper

Info

Publication number: CN107476975B
Application number: CN201710626891.5A
Authority: CN
Inventors: 何国苗
Original assignee: Hubei Guomiao Special Vehicle Manufacturing Co ltd
Current assignee: Hubei national Miao Special Vehicle Manufacturing Co., Ltd.
Priority date: 2017-07-27
Filing date: 2017-07-27
Publication date: 2021-06-29
Anticipated expiration: 2037-07-27
Also published as: CN107476975A

Abstract

A double-cylinder circulating suction type fan of a road sweeper comprises double cylinders, a front cylinder piston, a rear cylinder piston and a change-over valve, wherein the front cylinder piston, the rear cylinder piston and the change-over valve are arranged in the double cylinders. The air suction port, the air exhaust port and the two-side positioning engine base are arranged outside the double-cylinder body. And the bearing seat and the bearing are used for supporting the front cylinder piston, the rear cylinder piston and the rotating shaft of the change-over valve. The rotating shaft outside the bearing seat is respectively provided with a balance block and is connected with a 90-degree reversing angle device, so that the front cylinder piston and the rear cylinder piston rotate in the same direction and at the same speed and the reverse direction and the same speed with the change-over valve. One end of the change-over valve is provided with a belt pulley which is driven by a matched engine. The air suction port is connected with the outlet of the filter screen on the sweeping compartment body, and the air exhaust port is communicated with the atmosphere. The double-cylinder circulating suction type fan is low in required working speed, lubricating oil is not needed to be adopted between the front piston and the rear piston and the double cylinders, and the double-cylinder circulating suction type fan is suitable for being used as a fan matched with any road sweeper.

Description

Double-cylinder circulating suction type fan of road sweeper

Technical Field

The invention relates to a fan which uses a piston to circularly compress and rotate in a cylinder body, changes the structure of the traditional fan, and is suitable for a road sweeper with large suction flow and dry absorption and wet absorption.

Background

At present, a centrifugal fan is used for sucking kinetic energy of dust of a road sweeper, the number of fan blades and the power of an engine can only be increased to increase the suction force of the centrifugal fan so as to increase the rotating speed of the centrifugal fan, and the centrifugal fan at least reaches more than 2000 revolutions and basically meets the dust sucking requirement. The dry suction road cleaning and dust removing method is characterized in that a plurality of layers of high-density filter screens are mounted at the front end of a suction port, when the filter screens are blocked by dust or other dust, due to the fact that spaces exist among fan blades on a fan, after certain resistance is generated outside the suction port, the fan blades of the fan also rotate rapidly along with the driving of an engine, the suction force generated by the fan is still very small, the power of the engine is consumed, and in addition, the fan generates very large noise due to air rotational flow when rotating rapidly.

Disclosure of Invention

The problem that the dust removal suction force cannot be achieved by the fan matched with the road sweeper is solved. The invention provides a double-cylinder circulating suction type fan, which utilizes two arc-shaped front and rear cylinder pistons to rotate at the same speed in the same direction and is combined with a conversion valve with a circular sector to rotate at the same speed in opposite directions, so as to automatically control the air intake and exhaust of the front and rear cylinder bodies, thereby generating great suction force.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a double-cylinder circulation suction formula fan, its includes the protection casing, be provided with preceding cylinder body, back cylinder body, change-over valve in the protection casing, preceding cylinder body is provided with preceding jar induction port, preceding jar gas vent, preceding jar piston, the back cylinder body is provided with back jar induction port, back jar gas vent, back jar piston, preceding jar gas vent with back jar induction port intercommunication, preceding jar piston with back jar piston syntropy turns to, works as when preceding jar piston turns to preceding jar gas vent from the preceding jar induction port, form the first suction chamber of volume gradual increase between change-over valve, preceding cylinder body and the preceding jar piston, works as when preceding jar piston turns to preceding jar induction port from the preceding jar gas vent, form the second suction chamber of volume gradual increase between change-over valve, preceding cylinder body, the back cylinder body and the back jar piston.

Preferably, the front cylinder piston, the rear cylinder piston and the switching valve are connected through a 90-degree reversing corner device.

The invention draws an isosceles triangle according to the required fan specification on the metal or other material plate, respectively draws two circles with the same diameter by taking the isosceles base angle as the center of the circle, the circumference surfaces of the drawn circles can be overlapped or separated, and respectively draws a small circle on the center of the circle, the diameter of the small circle is slightly larger than that of the required rotating shaft, and the point of the intersection of the isosceles sides is taken as the center of the circle. The length from the center of the circle to the small edge of the lower corner is used as a radius to draw a circle. Cutting off the circumferential surfaces of the two semi-circles with the arc-shaped notches and the whole circle by using special equipment. The other three pieces were cut in the same manner. Welding the two semi-circles with the notches by using a thin plate made of the same material to form the cylinder body with the arc-shaped notch. Two rectangular openings are respectively arranged at the arc surface of the notch of the cylinder body and are used as an air inlet and an air outlet. The rectangular openings of the two cylinder bodies are connected to form a rectangular air suction opening and an air exhaust opening. Two thin plates made of the same material for the whole circle are welded to form a circular cylinder at the same height as the circular cylinder, an opening with the central angle of 100-160 degrees is formed on the circumferential surface of the connection part of the thin plates to serve as a switching valve, and the thin plates are welded by a rotating shaft and processed into concentric circles. Two front and rear cylinder pistons are manufactured, the length of each front and rear cylinder piston is slightly shorter than the height of the upper bottom and the lower bottom of the inner side of the conversion valve, the width of each front and rear cylinder piston can just rotate in the cylinder body through the rotating shaft, and the pistons with the arc surfaces are manufactured and installed on the rotating shaft. The two sides of the double-cylinder body are respectively connected with a machine base, three bearing seats are arranged on the machine base, the positions of the bearing seats are the same as the size of an isosceles triangle of a previous secant circle, and three bearing seats are respectively arranged on the circle center of the isosceles triangle. One engine base can be welded on the side surface of the double-cylinder body, and the other engine base can be movably disassembled, so that the front piston and the rear piston and the conversion valve can be conveniently installed. The front and rear cylinder pistons and the change-over valve are installed in the engine base, the cambered surfaces of the front and rear pistons face the direction of the exhaust port, and are supported and positioned by the bearing and the bearing seat, so that the pistons can freely rotate in the inner cavities of the double cylinder bodies. The fan is ensured to operate stably. Balance blocks are respectively arranged on the three shafts outside the bearing seat, and the positions of the front cylinder piston, the rear cylinder piston and the change-over valve are adjusted before the 90-degree reversing angle device is arranged. The front cylinder piston is turned to the lower opening of the air suction port, the sector opening surface of the change-over valve is turned to the upper opening of the air suction port, the rear cylinder piston is turned to the lower side of the air exhaust port, then the three rotating shafts are positioned by a 90-degree reversing angle turning device, the change-over valve is rotated to prevent collision, a protective cover is covered, and a belt pulley is installed on the rotating shaft of the change-over valve.

The invention has the beneficial effects that: the energy-saving wind power generator can generate great suction force when the fan runs at low speed, the power of the matched engine is small, the power of the engine can be completely converted into wind energy through the circulating running of the double cylinders, and the energy is saved obviously. The fan has low noise, simple structure and stable operation.

Drawings

FIG. 1 is a side sectional view of the present invention.

Fig. 2 is a side view of the present invention.

Fig. 3 is a front sectional view of the present invention.

Fig. 4 is a front view of the present invention.

In the figure: the double-cylinder air-suction device comprises a double-cylinder body 1, a front cylinder piston 2, a rear cylinder piston 3, a rotating shaft 4, an air suction port 5, an air exhaust port 6, a 90-degree reversing corner device 7, a balance block 8, a machine base 9, a bearing seat 10, a bearing 11, a belt pulley 12, a change-over valve 13, a protective cover 14, a front cylinder body 15, a front cylinder air suction port 151, a front cylinder air exhaust port 152, a rear cylinder body 16, a rear cylinder air suction port 161, a rear cylinder air exhaust port 162, a first suction cavity 17 and a second.

Detailed Description

The invention is further described below with reference to the figures and examples.

A double-cylinder circulation suction type fan of a road sweeper comprises a protective cover 14, wherein a front cylinder body 15, a rear cylinder body 16 and a change-over valve 13 are arranged in the protective cover 14, the front cylinder 15 is provided with a front cylinder air inlet 151, a front cylinder air outlet 152, a front cylinder piston 2, the rear cylinder block 16 is provided with a rear cylinder suction port 161, a rear cylinder discharge port 162, a rear cylinder piston 3, the front cylinder exhaust port 152 communicates with the rear cylinder suction port 161, the front cylinder piston 2 and the rear cylinder piston 3 are turned in the same direction, when the front cylinder piston 2 is shifted from the front cylinder suction port 151 to the front cylinder discharge port 152, the first suction chamber 17 having a volume gradually increased is formed between the switch valve 13, the front cylinder body 15 and the front cylinder piston 2, when the front cylinder piston 2 is shifted from the front cylinder exhaust port 152 to the front cylinder intake port 151, the second suction chamber 18, the volume of which is gradually increased, is formed among the switching valve 13, the front cylinder 15, the rear cylinder 16, and the rear cylinder piston 3.

The front cylinder piston 2, the rear cylinder piston 3 and the change-over valve 13 are connected through a 90-degree reversing angle device 7.

In fig. 1, two cylinders of a double cylinder 1 are communicated to form an intake port 5 and an exhaust port 6. The rotating shaft 4 is provided with a front cylinder piston 2 and a rear cylinder piston 3, and the cambered surfaces of the front cylinder piston 2 and the rear cylinder piston 3 are uniformly towards the exhaust port 6. The circumferential surface of the switching valve 13 is notched at a central angle of 100 to 160 degrees and is adjacent to the rotating shaft 4. When the device is installed, the opening of the circumferential surface of the change-over valve 13 is aligned to the upper surface of the air suction opening 5 of the double cylinder body, the front cylinder piston 2 just enters the lower side of the air suction opening 5 of the double cylinder body 1, and the rear cylinder piston 3 just reaches the position of the air exhaust opening 6, so that the front cylinder piston 2 and the rear cylinder piston 3 can freely enter the inner cavity of the change-over valve 13.

In fig. 2, a suction port 5 and an exhaust port 6 are formed in a double cylinder 1, and a base 9 is installed on a side surface thereof. A balance weight 8 is arranged on the rotating shaft 4 of the machine base 9, and a 90-degree reversing corner device 7 is arranged on the rotating shaft 4 at the outer end of the balance weight 8.

In fig. 3. The front, the back and the middle of the double cylinder body 1 are respectively provided with three rotating shafts 4, and the rotating shafts 4 are supported and fixed by a bearing seat 10 and a bearing 11. The front cylinder piston 2 and the rear cylinder piston 3 are arranged on the front rotating shaft 4 and the rear rotating shaft 4, the balance blocks 8 are respectively arranged on the outer sides of the bearing seats 10, the 90-degree reversing angle device 7 is arranged, and the protective cover 14 is arranged. A pulley 12 is mounted on the rotating shaft 4 of the protection cover 14.

In fig. 4, rectangular intake ports 5 and exhaust ports 6 are formed at front and rear positions of the twin cylinder 1, and the area of the exhaust port 6 is significantly larger than that of the intake port 5. The machine bases 9 are respectively installed on both sides of the double cylinder body 1, and the belt pulleys 12 are installed on the outer sides of the machine bases 9.

Claims

1. The utility model provides a road sweeper double-cylinder circulation suction formula fan which characterized in that: including protection casing (14), be provided with preceding cylinder body (15), back cylinder body (16), change-over valve (13) in protection casing (14), preceding cylinder body (15) are provided with preceding jar induction port (151), preceding jar exhaust port (152), preceding cylinder piston (2), back cylinder body (16) are provided with back jar induction port (161), back jar exhaust port (162), back jar piston (3), preceding jar exhaust port (152) with back jar induction port (161) intercommunication, preceding cylinder piston (2) with back jar piston (3) syntropy turns to, when preceding cylinder piston (2) turn to preceding jar exhaust port (152) from preceding jar induction port (151), form the first suction chamber (17) that the volume is crescent between change-over valve (13), preceding cylinder body (15) and preceding cylinder piston (2), when preceding cylinder piston (2) turn to preceding jar induction port (151) from preceding jar exhaust port (152), and a second suction cavity (18) with gradually increased volume is formed among the switching valve (13), the front cylinder body (15), the rear cylinder body (16) and the rear cylinder piston (3).

2. The double-cylinder circulation suction type fan of the road sweeper as recited in claim 1, wherein: the front cylinder piston (2), the rear cylinder piston (3) and the change-over valve (13) are connected through a 90-degree reversing angle device (7).