CN101476552B - Multi-cylinder translation compression device - Google Patents

Abstract

The invention belongs to the technical field of positive displacement compressors, and relates to a multi-cylinder translational compression device. A piston is connected to a crankshaft driven by a motor main shaft, and the piston reciprocates up and down relative to the cylinder body. The formed chute reciprocates in the left and right directions. The cylinder body is open or closed, and the cover plate, cylinder head, cylinder body and piston are respectively provided with inlet and exhaust channels, inlet/exhaust valves and corresponding valves. The sealing device has the advantages of small volume, high work efficiency, low noise, good sealing performance and long service life, and can be popularized and applied in the field of air compressors or hydraulic pumps.

Description

Multi-cylinder translation compression device

technical field

The invention belongs to the technical field of displacement compressors, in particular to a multi-cylinder translation compression device.

Background technique

At present, although there are many types of general reciprocating piston air compressors, the structure is similar, that is, the motor outputs power through the crankshaft, and the connecting rod drives the piston to reciprocate in the cylinder to compress gas or liquid to do work, so as to produce compressed air or high-pressure liquid. There are many defects in this kind of compressor: because the cylinder and the frame of the compressor are positioned with each other, that is, they do not move, the cylinder of the compressor with this structure is subject to a large lateral force, and one is that the lateral force forms useless work. , so that the power of the compressor becomes smaller and the working efficiency is low; second, the compression stroke is longer, the eccentric mass is large, the amplitude of vibration or resonance caused by the lateral force is large, the noise of the compressor is large, and the service life is short; the third is a The motor of the compressor only drives one or two pistons to work through the crank-link mechanism, and the structure is complicated; the fourth is that the piston ring is easy to wear due to the large lateral force on the crankshaft and the piston, resulting in poor sealing performance.

Contents of the invention

The object of the present invention is to provide a multi-cylinder translational compression device with good sealing performance, low noise, high working efficiency and long service life.

The purpose of the present invention is achieved like this:

The multi-cylinder translational compression device is characterized in that it includes a chute and a cylinder body composed of a motor, a main shaft, a crankshaft, a piston, upper and lower cover plates, and more than one set of pistons are connected to the crankshaft driven by the motor main shaft, and the pistons are arranged relative to the cylinder body. Reciprocating movement in the up and down direction, the cylinder body and the piston reciprocate in the left and right direction under the restriction of the upper and lower cover plates. , Exhaust valve, the cylinder body is open up and down, at this time, the cylinder body, the piston and the upper and lower cover plates form two compression chambers, a sealing device is arranged between the cylinder body and the upper and lower cover plates, the cylinder The body can also be partly or completely closed, that is, the upper and lower cylinder heads are respectively fixed at the upper and lower openings of the cylinder body. At this time, the cylinder body, the piston and the upper and lower cylinder heads form two compression chambers. The cylinder body and the piston are provided with intake and exhaust passages, intake and exhaust valves and corresponding sealing devices.

There is an eccentricity between the axis of the above-mentioned main shaft and the axis of the crankshaft.

An oil chamber filled with lubricating oil is provided on the outer surface of the cylinder body to lubricate the contact surfaces between the cylinder body and the upper and lower cover plates.

Left and right compression chambers are respectively arranged on the left and right sides of the cylinder body other than the above-mentioned cylinder body. The left and right pistons inside are provided with inlet and exhaust passages on the left and right cover plates of the left and right compression chambers, respectively, and inlet and exhaust valves are respectively arranged in the inlet and exhaust passages.

The outlets of the inlet and exhaust channels on the upper and lower cover plates and the left and right cover plates are respectively provided with inlet and exhaust joints.

The outstanding advantages of the present invention compared with prior art are:

1. Small size and high working efficiency: the invention adopts the piston and cylinder installed on the crankshaft of the compressor to form two or four compression chambers, so that the motor drives two or four cylinders to do work under the same power consumption , so that the piston and the cylinder are relatively concentrated, the overall volume of the compressor is small, and the working efficiency is high;

2. Low noise: Due to the translation technology of the piston and the cylinder body, the invention reasonably utilizes or reduces the impact caused by the linear motion of the piston on the cylinder body caused by the lateral force, and due to the short compression stroke, the gas in the cylinder body The pulsation time is short, the vibration time is short, the power consumption is low, and the noise of the compressor is low;

3. Good sealing performance: in the present invention, since the piston and the cylinder body balance the lateral force during the compression process, the operation of the piston body is stable, the friction with the inner wall of the cylinder is light, the wear of the piston ring is less, and the sealing performance is good;

4. The structure of the present invention can be popularized and applied in the fields of air compressors or hydraulic pumps.

Description of drawings

Fig. 1 is a partial sectional view of Embodiment 1 of the present invention;

Fig. 2 is the A-A direction sectional view of Fig. 1;

Fig. 3 is the sectional enlarged view of embodiment 2 of the present invention;

Fig. 4 is the sectional enlarged view of embodiment 3 of the present invention;

Fig. 5 is the sectional enlarged view of embodiment 4 of the present invention;

Fig. 6 is the sectional enlarged view of embodiment 5 of the present invention;

Fig. 7 is the sectional enlarged view of embodiment 6 of the present invention;

Fig. 8 is a schematic diagram of the end of exhaust of cylinder A and the end of air intake of cylinder B of the present invention;

Fig. 9 is a schematic diagram of the air intake process of cylinder A and the exhaust process of cylinder B of the present invention;

Fig. 10 is a schematic diagram of the exhaust process of cylinder A and the intake process of cylinder B of the present invention;

Fig. 11 is a schematic diagram of the end of air intake of cylinder A and the end of exhaust of cylinder B of the present invention.

Detailed ways

The present invention will be further described below with specific embodiment:

Example 1: See Figure 1-2:

The multi-cylinder translational compression device includes a motor 10, a main shaft 11, a crankshaft 12, a piston, a chute composed of upper and lower cover plates 40, 41, and a cylinder body 30. A group of pistons 21, 22 are connected to the crankshaft 12 driven by the motor main shaft 11. Of course, two or more sets of pistons can also be set on the crankshaft 12. When multiple sets of pistons are set, the axis of each set of pistons should be arranged to cross and evenly distribute on the axis of the main shaft. direction reciprocating movement, the cylinder 30 and the pistons 21 and 22 reciprocate in the left and right directions under the restriction of the upper and lower cover plates 40 and 41, and the upper and lower cover plates 40 and 41 are respectively provided with inlet and exhaust passages 401 and 402 , 411, 412, inlet and exhaust valves are respectively arranged in the inlet and outlet channels 401, 402, 411, 412, and the cylinder body 30 is open up and down. At this time, the cylinder body 30, the piston 21, 22 Two compression chambers 81, 82 are formed with the upper and lower cover plates 40, 41, a sealing device 50 is provided between the cylinder body 30 and the upper and lower cover plates 40, 41, piston rings 51 are provided on the pistons 21, 22, and the upper and lower cover plates 40 , 41 and the positioning seat 101 of the motor 10 are relatively fixed, there is an eccentricity e between the axis 111 of the above-mentioned motor main shaft 11 and the axis 121 of the crankshaft 12, and the outer surface of the above-mentioned cylinder 30 is provided with a cylinder body 30 and the oil cavity 70 filled with lubricating oil lubricated with the contact surfaces of the upper and lower cover plates 40, 41 are respectively provided with inlet and exhaust joints at the outlets of the intake and exhaust passages of the above-mentioned upper and lower cover plates.

The motor 10 works, the main shaft 11 and the crankshaft 12 drive the pistons 21, 22 to reciprocate up and down in the cylinder 30 relative to the cylinder 30, and the cylinder 30 and the pistons 21, 22 are driven by the lateral force of the crankshaft 12 Under the limitation of the upper and lower cover plates 40, 41, the left and right translation is performed.

Embodiment 2: See Figure 3 and Figure 1-2:

The basic structure of this embodiment is basically the same as that of Embodiment 1. The difference is that the above-mentioned cylinder body 30 can also be partially or completely closed, that is, the upper and lower openings of the cylinder body 30 are respectively fixed with fully closed upper and lower openings. Cylinder cover 31,32, at this moment, cylinder body 30, piston 21,22 and upper and lower cylinder cover 31,32 form two compression cavities 81 and 82, on upper and lower cylinder cover 31,32 and upper and lower cover plate 40,41 enter , The corresponding positions of the exhaust passages 401, 402, 411, 412 are provided with intake and exhaust openings, and the intake and exhaust openings of the upper and lower cylinder heads 31, 32 and the intake and exhaust passages 401, 402, 411, and 412 are respectively provided with sealing devices 52 for the intake and exhaust passages.

The motor 10 works, and the main shaft 11 and the crankshaft 12 drive the pistons 21, 22 to reciprocate up and down in the cylinder body 30 relative to the cylinder body 30, while the cylinder body 30, the upper and lower cylinder heads 31, 32 and the pistons 21, 22 move on the crankshaft 12. Driven by the lateral force of the upper and lower cover plates 40,41, the left and right translation is done. This structure is beneficial to the structural sealing of the upper and lower compression chambers 81,82.

Embodiment 3: See Figure 4 and Figure 1-2:

The basic structure of this embodiment is basically the same as that of Embodiment 1, the difference being that left and right compression chambers 83, 84 are respectively provided on the left and right sides of the cylinder 30 other than the above-mentioned cylinder 30, and the outside of the cylinder 30 The left and right sides of the left and right sides are made into the structure of pistons, and the left and right cover plates 42, 43 of the left and right compression chambers 83, 84 are also respectively provided with inlet and outlet passages 421, 422, 431, 432, and in the inlet and outlet passages 421, Intake and exhaust valves are respectively arranged in 422, 431, 432, and intake and exhaust joints are respectively arranged at the outlets of the intake and exhaust passages 421, 422, 431, 432 on the above-mentioned left and right cover plates. The structure can also be transformed into a compressor structure with upper and lower cylinder heads on the basis of embodiment 2.

The motor 10 works, and the main shaft 11 and the crankshaft 12 drive the pistons 21, 22 to reciprocate up and down relative to the cylinder 30 to compress gas or liquid in the cylinder 30. Driven by the force, it is limited by the upper and lower cover plates 40, 41 to translate left and right, and the left and right translation of the cylinder body 30 forms a change in the volume of the left and right compression chambers 83, 84, so that the gas can be compressed in the left and right compression chambers 83, 84 or liquid purpose.

Embodiment 4: see Fig. 5:

The basic structure of this embodiment is basically the same as that of Embodiment 3, except that the left and right pistons 23, 24 in the left and right compression chambers 83, 84 are connected to the left and right sides of the cylinder body 30, respectively.

The motor 10 works, and the main shaft 11 and the crankshaft 12 drive the pistons 21, 22 to reciprocate up and down relative to the cylinder 30 to compress gas or liquid in the cylinder 30. Driven by the force, it is limited by the upper and lower cover plates 40, 41 to translate left and right, and the left and right translation of the cylinder body 30 drives the left and right pistons 23, 24 to compress gas or liquid in the left and right compression chambers 83, 84. This structure is relatively easy.

Embodiment 5: see Fig. 6:

The basic structure of this embodiment is basically the same as that of Embodiment 1, the difference being that an intake channel 403 is provided on the cylinder body and the piston, and an exhaust channel 404 is provided on the upper and lower cover plates. Air intake and exhaust valves (not shown in the figure) are respectively arranged on the air passage, and an air intake passage 403 is arranged on the cylinder body and the piston, which is beneficial to the heat dissipation of the cylinder body and the piston.

Embodiment 6: see Fig. 7:

The basic structure of this embodiment is basically the same as that of Embodiment 3, the difference being that an air intake passage 403 is provided on the cylinder body and the piston, an exhaust passage 404 and an exhaust pipe are provided on the cylinder head, and the upper and lower covers The middle part of the plate reserves an exhaust pipe activity space. When the cylinder head translates left and right with the cylinder body, the exhaust pipe can move in the opening 405 on the upper and lower cover plates. This structure is beneficial to the sealing of the cylinder body.

Certainly, the cylinder head can also be set as a partially closed type, or a structure with the cylinder body moving and the piston fixed.

Fig. 8-11 has provided working process of the present invention, wherein:

Figure 8 shows: A cylinder exhaust end, B cylinder air intake end;

Fig. 9 shows: A cylinder suction process, B cylinder exhaust process;

Figure 10 shows: A cylinder exhaust process, B cylinder intake process;

Fig. 11 shows: the air intake of cylinder A ends, and the exhaust of cylinder B ends.

The above-described embodiment is only one of the preferred embodiments of the present invention, and is not intended to limit the protection scope of the present invention, so: all equivalent changes made according to the structure, shape and principle of the present invention should be covered by the present invention within the scope of protection.

Claims (5)

1. multi-cylinder translation compression device, it is characterized in that: comprise motor, main shaft, bent axle, piston, chute and the cylinder body formed of cover plate up and down, on the bent axle that electric machine main shaft drives, be connected with the piston more than a group, piston is done the to-and-fro motion of above-below direction with respect to cylinder body, cylinder body and piston are done the to-and-fro motion of left and right directions again under the restriction of cover plate up and down, be respectively arranged with on the cover plate up and down, the exhaust passage, advancing, be respectively arranged with in the exhaust passage into, drain tap, described cylinder body is the upper and lower opening formula, at this moment, cylinder body, piston forms two compression chambers with cover plate up and down, at cylinder body and be provided with seal arrangement up and down between the cover plate, described cylinder body also can be for partly or entirely closed, promptly be fixed with cylinder cap up and down respectively at the upper and lower opening place of cylinder body, at this moment, cylinder body, piston forms two compression chambers with cylinder cap up and down, up and down on the cylinder cap or/and cylinder body and piston be provided with into, exhaust passage and advancing, drain tap and corresponding seal arrangement.

2. multi-cylinder translation compression device according to claim 1 is characterized in that: have a throw of eccentric between the axis of the axis of described main shaft and bent axle.

3. multi-cylinder translation compression device according to claim 1 is characterized in that: be provided with the oil pocket that fills lubricant oil that can be lubricated the cylinder body and the surface of contact of cover plate up and down at the outer surface of described cylinder body.

4. multi-cylinder translation compression device according to claim 1, it is characterized in that: the left and right sides of the cylinder body outside described cylinder body is respectively arranged with left and right sides compression chamber, the left and right sides in the cylinder body outside made structure of piston or be connected with left and right sides piston in the compression chamber of the left and right sides in the left and right sides in the cylinder body outside respectively, on the cover plate of the left and right sides of left and right sides compression chamber, be respectively arranged with the inlet and outlet passage, in the inlet and outlet passage, be respectively arranged with the inlet and outlet valve.

5. according to claim 1 or 3 described multi-cylinder translation compression devices, it is characterized in that: the outlet port of the inlet and outlet passage on described cover plate up and down and left and right sides cover plate is respectively arranged with the inlet and outlet joint.

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