CN214247673U

CN214247673U - Cam-driven scraper type compressor

Info

Publication number: CN214247673U
Application number: CN202023184506.2U
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: 2021-09-21
Anticipated expiration: 2030-12-25

Abstract

The utility model discloses a cam drive scraper formula compressor relates to the compressor field, including cylinder liner, disk lobe, end cam, end cover, oil blanket bearing, integral key shaft and regulator, the utility model discloses a doctor-bar in the end cam drive disk lobe makes axial motion and realizes a plurality of volumetric synchro variation of breathing in-exhaust lobe to it is more stable to obtain stable output pressure, and adopts shift fork-integral key shaft mechanism to realize the regulation of compression ratio, the utility model discloses special structural design does benefit to steady load, reduces whole quick-witted size, reduces the noise of operation and conveniently adjusts output pressure.

Description

Cam-driven scraper type compressor

Technical Field

The utility model relates to a compressor field, concretely relates to cam drive scraper formula compressor.

Background

The scraper type compressor is widely used in many industries as a general device for compressing normal pressure gas into gas with higher pressure, and has the advantages of simple structure and manufacturing process, small volume, low cost, convenient maintenance and the like, so that the scraper type 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 disk-shaped compartment to keep the sealing between the scraper and the cylinder wall, and the mode makes the contradiction treatment of the friction force and the sealing between the balance scraper and a sliding groove complicated, and the operation of the compressor is unstable due to the radial vibration of the scraper or the friction problem between the scraper and the sliding groove when the operation speed of the compressor is greatly changed, particularly the rotation speed is low, which is very unfavorable for the lubrication, the noise control and the service life of the compressor. In addition, the prior scraper type compressor adopts the radially sliding scraper, so that the external diameter of the scraper is still larger, the compression ratio is fixed and cannot be adjusted, and the output pressure pulsation is larger. For the above reasons, there is a need for improving the stability of the output pressure of the vane compressor, facilitating the adjustment of the compression ratio, and reducing the outer dimensions while maintaining the inherent advantages of the vane compressor.

Disclosure of Invention

An object of the utility model is to provide a cam drive scraper formula compressor to solve the above-mentioned defect that prior art exists.

A cam-driven scraper compressor comprises a cylinder sleeve, a disc-shaped bulkhead, an end cam, an end cover, an oil seal bearing, a spline shaft and an adjuster;

the disc-shaped compartment comprises a compartment bottom plate, a plurality of scraping blades arranged in a radial sliding chute at the bottom of the compartment bottom plate and a return spring arranged at the bottom of the scraping blades, the disc-shaped compartment is embedded in a cylinder sleeve, an end face cam is rotatably covered on the disc-shaped compartment and forms a plurality of relatively independent compartment chambers with the compartment bottom plate, the scraping blades and the cylinder sleeve, a compartment air hole is axially arranged on the compartment bottom plate corresponding to each compartment and is correspondingly communicated with a cylinder sleeve air hole on the cylinder sleeve bottom plate, the outer side of the cylinder sleeve air hole is branched into two independent air holes and is respectively communicated with a respective air inlet one-way valve and an exhaust one-way valve, and the air inlet one-way valve and the exhaust one-way valve which are communicated with the compartment chambers are respectively converged into an air inlet and an air outlet;

the end cover seals the disc-shaped compartment and the end face cam in the cylinder sleeve through the sealing ring, the end face cam is connected with the prime motor through the spline shaft, and the regulator is installed on the spline shaft and used for regulating the exhaust pressure of the compressor.

Preferably, the spline shaft comprises a driving spline shaft, a spline housing and a cam spline shaft penetrating through the end face cam, the outer end of the spline housing with the annular neck groove at the waist part can be slidably sleeved on the driving spline shaft, and the inner end of the spline housing is connected with the cam spline shaft in an embedded mode.

Preferably, the adjuster comprises a shifting fork, an adjusting seat, an adjusting screw, a locking nut and a rotating handle connected to one end of the adjusting screw, the adjusting screw is connected to the shifting fork and the adjusting seat through threads, and the locking nut is sleeved on the adjusting screw and is close to the outer side of the shifting fork; the shifting fork is slidably embedded in the annular neck groove of the waist of the spline sleeve.

Preferably, the division of the compartments of the disc-shaped compartments is performed by an even number not less than 4, and the design of the contour of the end cam 3 ensures that the number of volume changes of each compartment per rotation is an even number not less than 2.

The utility model has the advantages that: the utility model discloses an end cam rotatably covers and establishes on the disk lobe and forms a plurality of relatively independent lobe chambers with lobe bottom plate, doctor-bar and cylinder liner, utilize end cam drive disk lobe doctor-bar in make axial motion and realize a plurality of volumetric synchro variation of breathing in-exhaust lobe to obtain stable output pressure ratio more stable, and adopt shift fork-integral key shaft mechanism to realize the regulation of compression ratio, special overall structure design is favorable to steady load, reduce whole machine size, reduce the noise of operation and conveniently adjust output pressure.

Drawings

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

Fig. 2 is a partial configuration expanded detail view of an embodiment of the present invention.

In the figure, a cylinder liner 1, a cylinder liner air hole 11, a sealing ring 12, a disk-shaped compartment 2, a compartment bottom plate 21, a scraper 22, a return spring 23, a compartment air hole 24, an end cam 3, an end cover 4, an oil seal bearing 5, a driving spline shaft 61, a cam spline shaft 62, a spline housing 62, an air inlet check valve 71, an air outlet check valve 81, an air inlet 7, an air outlet 8, a shifting fork 91, an adjusting seat 92, an adjusting screw 93, a locking nut 94 and a rotating handle 95 are arranged.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

The embodiment of the utility model provides a refer to fig. 1-2, and this embodiment includes cylinder liner 1, disk lobe 2, end cam 3, end cover 4, oil blanket bearing 5, integral key shaft and regulator.

The disc-shaped compartment 2 comprises a compartment bottom plate 21, a plurality of scraping pieces 22 arranged in a radial sliding chute at the bottom of the compartment bottom plate 21 and a return spring 23 arranged at the bottom of the scraping pieces 22, the disc-shaped compartment 2 is embedded in the cylinder sleeve 1, the end face cam 3 is rotatably arranged on the disc-shaped compartment 2 and forms a plurality of relatively independent compartment chambers with the compartment bottom plate 21, the scraping pieces 22 and the cylinder sleeve 1, a compartment air hole 24 is axially arranged on the bottom plate of the compartment bottom plate 21 corresponding to each compartment and correspondingly communicated with a cylinder sleeve air hole 11 on the bottom plate of the cylinder sleeve 1, the outer side of the cylinder sleeve air hole 11 is branched into two independent air holes and respectively communicated with a respective air inlet check valve 71 and an exhaust check valve 81, and the air inlet check valve 71 and the exhaust check valve 81 communicated with each compartment chamber are respectively collected to the air inlet 7 and the exhaust port 8; the end cap 4 encapsulates the disc-shaped compartment 2 and the end cam 3 in the cylinder liner 1 by means of a sealing ring 12.

The spline shaft comprises a driving spline shaft 61, a spline housing 62 and a cam spline shaft 63 penetrating through the end face cam 3, the outer end of the spline housing 62 with an annular neck groove at the waist part is slidably sleeved on the driving spline shaft 61, and the inner end is connected with the cam spline shaft 63 in an embedded mode.

The adjuster comprises a shifting fork 91, an adjusting seat 92, an adjusting screw 93, a locking nut 94 and a rotating handle 95 connected to one end of the adjusting screw 93, the adjusting screw 93 is connected to the shifting fork 91 and the adjusting seat 92 through threads, and the locking nut 94 is sleeved on the adjusting screw 93 and is close to the outer side of the shifting fork 91; the shift fork 91 is slidably fitted in an annular neck groove at the waist of the spline housing 62.

The face cam 3 allows 1/5 running clearance between the end cap 4 and the disc-shaped compartment 2 which is no less than the stroke of the wiper blade 22.

The compartment division of the disc-shaped compartment 2 is performed by an even number not less than 4, and the contour design of the end cam 3 ensures that the volume change times of each compartment is an even number not less than 2 per one rotation.

In this embodiment, the return spring 23 is made of spring steel, the seal ring 12, the oil seal bearing 5, the intake check valve 71, and the exhaust check valve 81 are made of standard components or fixed components, and the rest of the components are made of metal materials by a mature process.

The working process of the embodiment is as follows:

referring to fig. 1-2, the embodiment of the present invention is connected to the prime mover by the spline shaft linked with the end cam 3, when the end cam 3 is driven to rotate, the scraping blades 22 in the disk-shaped compartment 2 also slide axially in the sliding grooves of the compartment bottom plate 21, thereby forming a plurality of compartment chambers with periodically changing space volume between the disk-shaped compartment 2 and the cylinder liner 1, the volume of each compartment chamber is increased from small to small, gas is sucked from the gas inlet 7 through the gas inlet check valve 71, when the volume of the compartment chamber is decreased from large to small, gas is discharged through the gas outlet check valve 81 and collected to the gas outlet 8, and the suction and discharge directions of the compressor are not changed no matter the end cam 3 rotates forwards or backwards. When the output pressure needs to be adjusted, the distance between the end face cam 3 and the bottom plate of the disc-shaped compartment 2 can be adjusted through the spline shaft by loosening the locking nut 94 and rotating the adjusting screw 93 through the rotating handle 95, so that the volume change ratio of each compartment is changed, and the exhaust pressure of the compressor is adjusted.

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 the invention or which are equivalent to the scope of the invention are embraced by the invention.

Claims

1. A cam-driven vane compressor characterized by: the device comprises a cylinder sleeve (1), a disc-shaped bulkhead (2), an end face cam (3), an end cover (4), an oil seal bearing (5), a spline shaft and an adjuster;

the disc-shaped compartment (2) comprises a compartment bottom plate (21), a plurality of scraping blades (22) arranged in a radial sliding groove at the bottom of the compartment bottom plate (21) and a return spring (23) arranged at the bottom of the scraping blades (22), the disc-shaped compartment (2) is embedded in the cylinder sleeve (1), the end face cam (3) is rotatably covered on the disc-shaped compartment (2) and forms a plurality of relatively independent compartment chambers with the compartment bottom plate (21), the scraping blade (22) and the cylinder sleeve (1), a compartment air hole (24) is axially arranged on the compartment bottom plate (21) corresponding to each compartment and is correspondingly communicated with a cylinder sleeve air hole (11) on the cylinder sleeve (1) bottom plate, the outer side of the cylinder sleeve air hole (11) is branched into two independent air holes which are respectively communicated with the respective air inlet one-way valve (71) and the exhaust one-way valve (81), an intake check valve (71) and an exhaust check valve (81) which are communicated with each compartment chamber are respectively collected to the air inlet (7) and the exhaust port (8);

the end cover (4) seals the disc-shaped compartment (2) and the end cam (3) in the cylinder sleeve (1) through a sealing ring (12), the end cam (3) is connected with a prime motor through a spline shaft, and the regulator is mounted on the spline shaft and used for regulating the exhaust pressure of the compressor.

2. A cam-driven vane compressor as set forth in claim 1 wherein: the spline shaft comprises a driving spline shaft (61), a spline sleeve (62) and a cam spline shaft (63) penetrating through the end face cam (3), the outer end of the spline sleeve (62) with the waist provided with the annular neck groove is slidably sleeved on the driving spline shaft (61), and the inner end of the spline shaft is connected with the cam spline shaft (63) in an embedded mode.

3. A cam-driven vane compressor as set forth in claim 1 wherein: the regulator comprises a shifting fork (91), a regulating seat (92), a regulating screw rod (93), a locking nut (94) and a rotating handle (95) connected to one end of the regulating screw rod (93), the regulating screw rod (93) is connected to the shifting fork (91) and the regulating seat (92) through threads, and the locking nut (94) is sleeved on the regulating screw rod (93) and is close to the outer side of the shifting fork (91); the shifting fork (91) is slidably embedded in an annular neck groove at the waist part of the spline sleeve (62).

4. A cam-driven vane compressor as set forth in claim 1 wherein: the end cam (3) allows a free play of 1/5 not less than the stroke of the wiper blade (22) between the end cap (4) and the disc-shaped compartment (2).

5. A cam-driven vane compressor as set forth in claim 1 wherein: the compartment chambers of the disc-shaped compartments (2) are divided by an even number not less than 4, and the contour line design of the end cam (3) ensures that the volume change times of each compartment chamber is an even number not less than 2 every time the compartment chamber rotates one circle.