CN113153748A

CN113153748A - Through-shaft traveling scraper type compressor and using method thereof

Info

Publication number: CN113153748A
Application number: CN202011568392.3A
Authority: CN
Inventors: 白顺科
Original assignee: Nanjing Vocational University of Industry Technology NUIT
Current assignee: Nanjing Vocational University of Industry Technology NUIT
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-07-23

Abstract

The invention discloses a through-shaft moving scraper type compressor and a using method thereof, relating to the field of compressors, comprising a base, a cylinder body supported on the base, a rotor, a through-shaft scraper, an end cover, an air inlet and an air outlet which are respectively connected with the air inlet side and the air outlet side of the cylinder body, wherein the through-shaft scraper with slight expansion and contraction radially penetrates through the rotor, the curve design of a cylinder wall realizes the restraint of the plane motion of the through-shaft scraper, the through-shaft scraper moves along a chute in the rotor while rotating along with the rotor, thereby a plurality of bays with periodically changed space volumes are formed on the rotor, the cylinder wall and the scraper, the invention mainly realizes the volume change of an air suction-exhaust bay by the restraint of the specially designed cylinder wall curve on the plane motion of the through-shaft scraper, so that the friction force between the through-shaft scraper and the cylinder wall is more stable, thereby being beneficial to the lubrication and the noise, thereby improving the service life.

Description

Through-shaft traveling scraper type compressor and using method thereof

Technical Field

The invention relates to the field of general machinery, in particular to a through-shaft traveling scraper type compressor and a using method thereof.

Background

A compressor is a device widely used in many industries, and its main function is to compress a gas at normal pressure into a gas having a higher pressure. The compressor adopts various principle structures, such as piston type, turbine type, centrifugal type, screw type, spiral type, scraper type and the like, wherein the scraper type compressor has the advantages of simple structure and manufacturing process, small volume, low cost, convenient maintenance and the like, so that the compressor is preferentially adopted in low-power occasions with narrow space, high requirements on cost control and easy maintenance. The scraper of the scraper type compressor usually adopts the pressure of a return spring or the centrifugal force generated by the rotation of a rotor to keep the sealing between the scraper and a cylinder wall, and the mode makes the treatment of the contradiction between the friction force between the balance scraper and a sliding groove and the sealing complicated, and the operation of the compressor is unstable due to the radial vibration of the scraper or the friction between the scraper and the sliding groove when the operation speed of the compressor is greatly changed, particularly the rotating speed is low, which is very unfavorable for the lubrication, the noise control and the service life of the compressor. For the above reasons, there is a need for further improvement in operation stability, reduction in volume, reduction in operation noise, improvement in lubrication conditions, and extension in operation life while retaining the inherent advantages of the vane compressor.

Disclosure of Invention

The invention aims to provide a through-shaft floating scraper type compressor, which aims to overcome the defects in the prior art.

A through-shaft moving scraper type compressor comprises a base, a cylinder body supported on the base, a rotor, a through-shaft scraper blade, end covers, an air inlet and an air outlet which are respectively connected to the air inlet side and the air outlet side of the cylinder body, sealing rings are embedded into sealing ring grooves formed in the outer edges of the inner sides of the end covers, the two end covers are respectively in sealing connection with the cylinder body from the front end and the rear end of the cylinder body, the rotor is eccentrically arranged in the cylinder body in a penetrating mode and arranged in oil seal bearings arranged on the end covers through driving shafts arranged at the front end and the rear end of the rotor in a penetrating mode, and the through-shaft scraper blade blades can be arranged in radial sliding grooves in the rotor in a radial sliding mode.

Preferably, the through shaft scraping blade comprises scraping plates arranged at two ends respectively, a loose pin, a sleeve and a tension spring, wherein the outer end of the loose pin is embedded in the inner side of the scraping plate; the loose pins of the plurality of through shaft scraping blades are arranged in a crossed mode along the rotating shaft.

Preferably, the stroke of the tension spring is matched with the design of the cylinder wall curve to ensure that: when the through shaft scraping blade rotates for one circle, the pressure of the outer end of the scraping blade is basically consistent with that of the inner wall of the cylinder body.

Preferably, the inner wall of the cylinder body can be separately provided with a separate cylinder sleeve and embedded into the inner side of the cylinder body.

The invention has the advantages that: the invention adopts the transverse shaft scraping blade with slight expansion and contraction to penetrate the rotor along the radial direction, the curve design of the cylinder wall realizes the restraint on the plane movement of the transverse shaft scraping blade, the transverse shaft scraping blade rotates along with the rotor and simultaneously moves along the chute in the rotor, thereby forming a plurality of compartments with periodically changed space volume among the rotor, the cylinder wall and the transverse shaft scraping blade. In the running process of the compressor, the volume change of the suction-exhaust compartment is realized mainly by the restriction of a specially designed cylinder wall curve to the plane motion of the transverse shaft scraping blade, so that the friction force between the scraping blade and the cylinder wall is relatively stable, the lubrication of the compressor is facilitated, the noise is reduced, and the service life is prolonged.

Drawings

Fig. 1 is a schematic view of the overall configuration of an embodiment of the present invention.

Fig. 2 is a schematic sectional view of a cylinder according to an embodiment of the present invention.

FIG. 3 is a detail view of a portion of the construction of two pairs of flights according to the present invention.

Fig. 4 is a sectional view at the blade of the present invention.

In the figure, a machine base 1, a cylinder body 2, a rotor 3, a through shaft scraping blade 4, an end cover 5, an air inlet 6 and an air outlet 7;

the seal ring 21, the drive shaft 31, the scraper 41, the sleeve 42, the loose pin 43, the tension spring 44, the seal ring groove 51, and the oil seal bearing 53.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

Referring to fig. 1-4, the present embodiment includes a base 1, a cylinder 2 supported on the base 1, a rotor 3, a through shaft wiper 4, an end cap 5, and an air inlet 6 and an air outlet 7 connected to an air inlet side and an air outlet side of the cylinder 2, respectively. The sealing ring 21 is embedded into a sealing ring groove 51 arranged on the outer edge of the inner side of the end cover 5, the two end covers 5 are respectively connected with the cylinder body 2 in a sealing way from the front end and the rear end of the cylinder body 2, the rotor 3 is eccentrically arranged in the cylinder body 2 in a penetrating way and penetrates through an oil seal bearing 53 arranged on the end cover 5 through a driving shaft 31 arranged on the front end and the rear end of the rotor 3, and the plurality of through shaft scraping blades 4 are arranged in a radial sliding way in the rotor 3 in a radial direction.

The through shaft scraper 4 comprises a scraper 41 arranged at two ends, a loose pin 43 with the outer end embedded in the inner side of the scraper 41, a sleeve 42 and a tension spring 44, wherein the loose pin 43 at two ends restrains the tension spring 44 in the sleeve 42 from two ends of the sleeve 42; the plurality of loose pins 43 of the through shaft wiper 4 are arranged to intersect each other along the rotation axis.

The stroke of the tension spring 44 in cooperation with the design of the cylinder wall curve ensures that: when the shaft penetrating scraper 4 rotates for one circle, the pressure of the outer end of the scraper 4 and the inner wall of the cylinder body 2 is basically consistent.

The open cavity on the side of the cylinder 2 close to the air inlet is enlarged and biased toward the side of the rotor rotation direction, and the open cavity on the side of the cylinder 2 close to the air outlet is reduced and biased toward the side of the rotor rotation direction.

The inner wall of the cylinder body 2 can be separately provided with a separate cylinder sleeve and embedded into the inner side of the cylinder body 2

In this embodiment, the seal ring 21 and the pin shaft seal ring 42 are made of oil-resistant rubber materials, the oil seal bearing 53 is made of standard parts or fixed parts, the tension spring 44 is made of spring steel, and other parts are made of metal materials by a mature process.

The working process of the embodiment is as follows:

referring to fig. 1-4, in use, the embodiment of the invention is connected to a prime mover by a drive shaft 31 on a rotor 3, when the rotor 3 is driven to rotate clockwise, a through shaft wiper 4 linked with the rotor 3 also rotates along with the cylinder body 2, because the cylinder wall curve is constrained to the planar motion of the through shaft wiper 4, the through shaft wiper 4 moves along a chute in the rotor 3 while rotating with the rotor, thereby forming a plurality of compartments with periodically varying spatial volumes between the rotor, the cylinder wall and the through shaft wiper, each compartment has a volume that increases from small to large when passing through an air inlet 6 to suck in gas and a volume that decreases from large to small when passing through an air outlet 7 to compress the gas and discharge the gas to the air outlet 7. In the running process of the compressor, the volume change of the suction-exhaust compartment is realized mainly by the planar motion constraint of the specially designed cylinder wall curve to the through shaft scraping blade, so that the friction force between the through shaft scraping blade and the cylinder wall is relatively stable, the lubrication of the compressor and the noise reduction are facilitated, and the service life is prolonged.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.

Claims

1. The utility model provides a running shaft scraper formula compressor that moves about which characterized in that: including frame (1), support cylinder body (2), rotor (3) on frame (1), run through axle doctor-bar (4), end cover (5), connect respectively in air inlet (6) and the gas vent (7) of the side of admitting air and the side of exhausting of cylinder body (2), sealing washer 21 imbeds and establishes in the sealing washer groove 51 that the inboard outer fringe of end cover (5) was established, and both ends are rather than sealing connection respectively around two end covers (5) follow cylinder body (2), and rotor (3) off-centre runs through locate in cylinder body (2) and run through the drive shaft 31 that both ends were established around rotor (3) and locate in the oil blanket bearing 53 on end cover (5), and a plurality of run through in the radial spout that axle doctor-bar (4) can radially slide and locate in rotor (3).

2. A through-shaft traveling vane compressor according to claim 1, wherein: the shaft penetrating scraper (4) comprises scraping plates (41) arranged at two ends respectively, a loose pin (43) with the outer end embedded in the inner side of the scraping plates (41), a sleeve (42) and a tension spring (44), wherein the loose pins (43) at the two ends restrain the tension spring (44) in the sleeve (42) from the two ends of the sleeve (42); the loose pins (43) of the plurality of through shaft scrapers (4) are arranged crosswise along the rotating shaft.

3. A through-shaft traveling vane compressor according to claim 2, wherein: the stroke of the tension spring (44) is matched with the design of the cylinder wall curve to ensure that: when the through shaft scraping blade (4) rotates for one circle, the pressure of the outer end of the scraping blade (4) is basically consistent with that of the inner wall of the cylinder body (2).

4. A through-shaft traveling vane compressor according to claim 1, wherein: the inner wall of the cylinder body (2) can be separately provided with a separated cylinder sleeve and is embedded into the inner side of the cylinder body (2).

5. The use method of the through-shaft traveling scraper type compressor according to claim 3 is characterized by comprising the following steps:

the driving shaft (31) on the rotor (3) is connected with a prime motor, when the rotor (3) is driven to rotate clockwise, the through shaft scraping blades (4) linked with the rotor (3) also rotate in the cylinder body (2), because the cylinder wall curve is restricted to the plane motion of the through shaft scraping blades (4), the through shaft scraping blades (4) move along the chutes in the rotor (3) while rotating along with the rotor, thereby forming a plurality of compartments with periodically changing space volume among the rotor, the cylinder wall and the through shaft scraping blades, the volume of each compartment is increased from small when the compartment rotates through the air inlet (6) to suck air, and the volume of each compartment is decreased from large when the compartment rotates through the air outlet (7) to compress the air and discharge the air to the air outlet (7).