Split type oilless air compressor crankcase and air compressor

Abstract

The utility model relates to the technical field of air compressors, and particularly discloses a split type oilless air compressor crankcase which is arranged at two ends of a motor shell, is detachably connected with the motor shell and comprises a left end cover, a right end cover, a left crankcase body, a right crankcase body and a first sealing ring. The left end cover and the right end cover are used for sealing the crankcase and limiting the crankshaft, the left crankcase and the right crankcase are used for containing the crankshaft and a crankshaft connecting rod and providing air inlet channels, piston cylinders are arranged on the upper portions of the left crankcase and the right crankcase, and the first sealing ring is arranged between the crankcase and the piston cylinders to prevent blow-by. And sealing surfaces are arranged on the inner sides of the left end cover and the right end cover, are matched with the left crankcase and the right crankcase through sealing gaskets, and are fixed through a connecting assembly to form a sealed cavity structure. In addition, the crankcase is further provided with symmetrically-arranged air inlet holes, heat dissipation mechanisms, crankshaft holes and sealing and supporting structures of the crankshaft holes, and installation, maintenance and heat dissipation are convenient. The utility model further provides an air compressor adopting the split type oilless air compressor crankcase.

Description

TECHNICAL FIELD

[0001] The utility model relates to air compressor technical field, concretely relates to a split type oil -free air compressor crankcase, and simultaneously relates to an air compressor applying split type oil -free air compressor crankcase. BACKGROUND

[0002] In the air compressor technical field, the crankcase as the core component of the air compressor, its structure design has the vital influence to the overall performance, the operating efficiency and the long -term reliability of air compressor. For a long time, the traditional air compressor crankcase design generally adopts the integral type structure, this design indeed exhibits the good stability and the durability under the specific application scene and the motor arrangement mode. The integral type structure reduces the connecting component and the joint, effectively improves the rigidity and the sealing of the crankcase, thereby meets the demand of air compressor to high pressure, high speed operating environment to some extent.

[0003] However, along with the continuous development of air compressor technology and the continuous expansion of application field, the traditional crankcase design also gradually exposes some problems that can not be ignored. Especially in the installation and maintenance, the crankcase of integral type structure due to bulky, complex structure, often lead to the difficulty in assembly process increases, the technical requirement of installation worker is also relatively higher. Meanwhile, once the crankcase appears the fault or needs the regular maintenance, due to its integral type characteristics, often needs the longer downtime and the complex disassembly process, this not only increases the maintenance cost, also can cause the adverse effect to the continuous operation of production line.

[0004] More critical is, along with the rise of the middle -position motor design scheme, the traditional crankcase design faces the unprecedented challenge. The middle -position motor as a new type of motor arrangement mode, its with traditional side -position motor in structure layout, space utilization and heat dissipation performance etc. There are significant differences. Therefore, the original for the side -position motor design's crankcase and motor shell cannot be directly applied to the middle -position motor scheme, this forces the industry's technical personnel must re -examine and improve the design of the crankcase.

[0005] In order to meet the arrangement requirement of middle -position motor, and solve the problem of traditional crankcase design in installation, maintenance and adaptability, design a kind of air compressor shell that can adapt to new environment, new requirement becomes the technical problem that the current urgent to be solved. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a split type oil -free air compressor crankcase,

[0007] In order to solve the above technical problem, the utility model provides a split type oil -free air compressor crankcase, is arranged at the both ends of motor shell, and adopts detachable connection between motor shell, its characterized in that, comprising:

[0008] Left and right end covers for sealing the crankcase and limiting the crankshaft.

[0009] Left and right crankcases for containing the crankshaft and crank connecting rod and providing an air inlet, the upper part of the left and right crankcases being provided with a piston cylinder.

[0010] A first sealing ring is arranged between the crankcase and the piston cylinder to prevent gas leakage between the crankcase and the piston cylinder.

[0011] The inner side of the left and right end covers is provided with a sealing surface, which cooperates with the left and right crankcases through a sealing gasket and is fixed through a connecting assembly to form a sealed cavity structure.

[0012] In addition to the above technical features, the present application also improves in the following aspects:

[0013] In some embodiments, the left and right crankcases are symmetrically arranged, and an air inlet is formed on one side of each of the left and right crankcases, and external airflow enters the crankcase through the rotation of the crankshaft and flows around the crankshaft in a circular manner.

[0014] In some embodiments, under the action of the rotation force of the crankshaft, the external airflow enters the piston cylinder arranged at the upper part of the crankcase after rotating 270° around the crankshaft in the crankcase, and is cooled.

[0015] In some embodiments, the left and right end covers are each provided with a cooling mechanism, which includes a blade and a shaft for mounting the blade, and the blade is rotatably mounted on the left and right end covers through the shaft.

[0016] In some embodiments, the center of each of the left and right end covers is provided with a crankshaft hole, which is provided with a sealing ring mounting surface, a shaft shoulder and a bearing mounting surface, and the shaft shoulder is used to limit the axial displacement of the bearing and the sealing ring.

[0017] In some embodiments, the left and right end covers and the left and right crankcases are each provided with a through hole and / or a first threaded hole on the outer side of the sealing surface, which is used to mount a protective cover of a protective cooling mechanism; the through hole and / or the threaded hole are provided in multiple numbers and are distributed around the outer side of the sealing surface of the left and right end covers and the left and right crankcases.

[0018] In some embodiments, the mounting plate arranged on the inner side of the left and right crankcases is provided with a through hole and / or a second threaded hole, which is used to connect a motor housing; the center of the mounting plate is provided with a shaft mounting hole, the middle part of the shaft mounting hole is provided with a retainer, and the opening close to the crankshaft is provided with a second sealing ring.

[0019] In some embodiments, the top of the left crankcase and the right crankcase is provided with a stepped piston hole, and the first sealing ring is arranged at the stepped piston hole; a through hole and / or a third threaded hole are arranged outside the circumferential side of the stepped piston hole, and are used for fixing the piston cylinder.

[0020] Another purpose of the utility model lies in providing an air compressor applying the split type oil-free air compressor crankcase.

[0021] By adopting the technical scheme, the utility model at least has one of the following beneficial effects:

[0022] 1. Excellent sealing performance: the sealing surface arranged in the left end cover and the right end cover cooperates with the sealing gasket and the connecting assembly to form a tight sealing cavity structure, effectively preventing the leakage of the gas in the crankcase, and improving the compression efficiency and stability of the air compressor.

[0023] 2. Efficient heat dissipation design: the left crankcase and the right crankcase are symmetrically arranged, and the air inlet hole is arranged on one side; the power generated by the rotation of the crankshaft makes the external airflow flow around the crankshaft in a circumferential annular shape and enter the crankcase, thereby enhancing the heat dissipation effect of the crankcase.

[0024] 3. Enhanced heat dissipation mechanism: the heat dissipation mechanism arranged on the left end cover and the right end cover includes the blade and the rotating shaft, and the rotation of the blade further enhances the heat dissipation effect outside the crankcase, which helps to maintain the efficient and stable operation of the air compressor.

[0025] 4. Convenient maintenance and installation: the split type design enables the detachable connection between the crankcase and the motor shell, facilitating the assembly, disassembly and maintenance of the air compressor.

[0026] 5. Stable crankshaft support and sealing: the crankshaft hole arranged in the center of the left end cover and the right end cover has the sealing ring mounting surface, the shaft shoulder and the bearing mounting surface, and the shaft shoulder effectively limits the axial displacement of the bearing and the sealing ring, ensuring the stable operation and sealing performance of the crankshaft.

[0027] 6. Wide application prospect: the split type oil-free air compressor crankcase has excellent sealing performance, efficient heat dissipation design and convenient maintenance and installation, and is suitable for various air compressors requiring efficient and stable operation.

[0028] In summary, the split type oil-free air compressor crankcase and the air compressor applied thereto provided by the utility model have the advantages that the overall performance of the air compressor is remarkably improved through optimization of sealing performance, heat dissipation effect, installation and maintenance convenience, structural stability and wide applicability, and the utility model has wide application prospect and market value. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings, which are included to provide a further understanding of the utility model, form a part of the utility model and are provided to explain the utility model and are not intended to limit the utility model.

[0030] Figure 1 It is a split type oil-free air compressor crankcase combination structure schematic view of the utility model;

[0031] Figure 2 It is a motor and right crankcase and right end cover combination structure schematic view of the utility model;

[0032] Figure 3 It is a right end cover and heat dissipation mechanism connection structure schematic view of the utility model;

[0033] Figure 4 It is a right crankcase and right end cover combination structure schematic view of the utility model;

[0034] Figure 5 It is a right end cover and heat dissipation mechanism connection structure schematic view of the utility model;

[0035] Figure 6 It is a right end cover structure schematic view of the utility model;

[0036] Figure 7 It is a right end cover structure schematic view of the utility model;

[0037] Reference signs in the drawings are as follows:

[0038] 1, left end cover; 2, right end cover; 3, left crankcase; 4, right crankcase; 5, piston cylinder; 6, first sealing ring; 7, sealing gasket; 8, connecting assembly; 9, air inlet hole; 10, vane; 11, rotating shaft; 12, crankshaft hole; 13, sealing ring mounting surface; 14, shaft shoulder; 15, bearing mounting surface; 16, motor shell; 17, first threaded hole; 18, mounting plate; 19, second threaded hole; 20, rotating shaft mounting hole; 21, check ring; 22, second sealing ring; 23, stepped piston hole; 24, third threaded hole. DETAILED DESCRIPTION

[0039] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative in nature and is in no way intended to limit the application, its application or uses. The application can be implemented in other manner different from those described herein, and is not limited to the embodiments described herein.

[0040] It should be noted that the embodiments described in the present application can be combined with other embodiments without conflict, unless otherwise defined. Unless otherwise defined, the technical terms or scientific terms involved in the present application should be understood as the usual meaning by those skilled in the art.

[0041] The terms "one", "a", "an", "the", and similar words in the present application do not represent a quantity limitation, and can represent a singular or plural number. The terms "include", "contain", "have", and any variations thereof in the present application are intended to cover non-exclusive inclusion; the terms "first", "second", "third", and the like in the present application are merely to distinguish similar objects, and do not represent a specific order of the objects.

[0042] Based on the existing technology, the design of the crankcase of the air compressor mainly adopts an integrated structure, which exhibits good stability and durability under certain applications, but as the technology develops and the application expands, its problems gradually appear. The integrated structure results in a large volume and complex structure of the crankcase, increasing the assembly difficulty and maintenance cost, and requiring high technical requirements for installation workers. Once a fault occurs, a long downtime and a complex disassembly process are required, which affects the continuous operation of the production line. In addition, with the rise of the design scheme of the middle motor, the traditional crankcase design cannot adapt to the requirements of new layout, space utilization and heat dissipation performance, and improvement is urgently needed to meet the design of the air compressor shell in the new environment and new demand.

[0043] Based on the above problems, the present application provides a split type oil-free air compressor crankcase, which will be described in detail below in combination with specific embodiments.

[0044] Referring to Figures 1-7 The present application discloses a split type oil-free air compressor crankcase, which is arranged at both ends of the motor shell 16 and detachably connected with the motor shell 16. The crankcase mainly comprises a left end cover 1, a right end cover 2, a left crankcase 3, a right crankcase 4 and a first sealing ring 6.

[0045] The left end cover 1 and the right end cover 2 are used to seal the crankcase and limit the crankshaft. The inner side of each is provided with a sealing surface, which cooperates with the left crankcase 3 and the right crankcase 4 through a sealing gasket 7, and is fixed through a connecting assembly 8 (such as a bolt), forming a sealed cavity structure.

[0046] The left crankcase 3 and the right crankcase 4 are used to accommodate the crankshaft and the crankshaft connecting rod, and provide the air inlet. They are symmetrically arranged, and each has an air inlet hole 9 on one side. The external airflow flows into the crankcase in a circumferential annular manner by the rotation of the crankshaft. Under the action of the rotation force of the crankshaft, the external airflow rises into the piston cylinder 5 arranged at the upper part of the crankcase after rotating 270° around the crankshaft, and is cooled. The upper part of the left crankcase 3 and the right crankcase 4 is provided with the piston cylinder 5, and the first sealing ring 6 is arranged between the crankcase and the piston cylinder 5 to prevent air leakage between the crankcase and the piston cylinder 5.

[0047] The left end cover 1 and the right end cover 2 are each provided with a cooling mechanism, which includes a vane 10 and a rotating shaft 11 for mounting the vane 10. The vane 10 is rotatably mounted on the left end cover 1 and the right end cover 2 through the rotating shaft 11, which enhances the cooling effect of the external part of the crankcase.

[0048] The center of the left end cover 1 and the right end cover 2 is provided with a crankshaft hole 12, which is provided with a sealing ring mounting surface 13, a shaft shoulder 14 and a bearing mounting surface 15. The shaft shoulder 14 is used to limit the axial displacement of the bearing and the sealing ring, and ensures the stable operation and sealing of the crankshaft.

[0049] The outer side of the sealing surface of the left end cover 1 and the right end cover 2 and the left crankcase 3 and the right crankcase 4 is provided with a through hole or a first threaded hole 17, which is used to mount a protective cover for the protective cooling mechanism.

[0050] In this embodiment, the first threaded hole 17 is provided, and there are four groups of eight first threaded holes 17, which realize the sealing of the crankcase and are distributed around the outer side of the sealing surface of the left end cover 1 and the right end cover 2 and the left crankcase 3 and the right crankcase 4.

[0051] The inner side of the left crankcase 3 and the right crankcase 4 is provided with a mounting plate 18, which is provided with a second threaded hole 19 for connecting the motor housing 16. The center of the mounting plate 18 is provided with a rotating shaft 11 mounting hole, the middle part of the rotating shaft 11 mounting hole is provided with a check ring 21, and the opening close to the crankshaft is provided with a second sealing ring 22, which further enhances the stability and sealing of the crankcase.

[0052] The top of the left crankcase 3 and the right crankcase 4 is provided with a stepped piston hole 23, and the first sealing ring 6 is arranged at the stepped piston hole 23. A through hole and / or a threaded hole is arranged on the circumferential outer side of the stepped piston hole 23, which is used to fix the piston cylinder 5.

[0053] The application also discloses an air compressor applying the above-mentioned split type oil-free air compressor crankcase, which comprises a motor housing 16 and the above-mentioned split type oil-free air compressor crankcase arranged at both ends of the motor housing 16.

[0054] In the specific assembly, first, the left crankcase 3 and the right crankcase 4 are connected and fixed with the motor housing 16 through the through hole and / or the second threaded hole 19 on the mounting plate 18. Then, the crankshaft and the crankshaft connecting rod are installed into the left crankcase 3 and the right crankcase 4, and the left end cover 1 and the right end cover 2 are respectively installed on both ends of the crankshaft. The left end cover 1 and the right end cover 2 are matched with the sealing surface of the left crankcase 3 and the right crankcase 4 through the sealing gasket 7, and are fixed through the connecting assembly 8 (such as a bolt), so as to form a sealed cavity structure.

[0055] The piston cylinder 5 is fixed on the top of the left crankcase 3 and the right crankcase 4 through the through hole and / or the third threaded hole outside the circumferential side of the stepped piston hole 23, and the first sealing ring 6 is arranged at the stepped piston hole 23 to prevent gas leakage. The heat dissipation mechanism (the blade 10 and the rotating shaft 11) on the left end cover 1 and the right end cover 2 is used to enhance the heat dissipation effect outside the crankcase.

[0056] The protective cover can be installed through the through hole and / or the first threaded hole 17 on the left end cover 1, the right end cover 2, the left crankcase 3 and the right crankcase 4, so as to protect the heat dissipation mechanism and other components of the crankcase.

[0057] In the use process, the crankshaft rotates under the driving of the motor, the external airflow enters the crankcase through the air inlet hole 9, and under the action of the rotating force of the crankshaft, the external airflow enters the piston cylinder 5 after rotating 270° around the crankshaft and then goes upward, so as to be cooled. At the same time, the heat dissipation mechanism on the left end cover 1 and the right end cover 2 further enhances the heat dissipation effect outside the crankcase through the rotation of the blade 10.

[0058] The left end cover 1 and the right end cover 2 and the left crankcase 3 and the right crankcase 4 form a tightly sealed cavity structure through the sealing gasket 7 and the connecting assembly 8, so as to effectively prevent the leakage of the gas in the crankcase. The shaft shoulder 14 limits the axial displacement of the bearing and the sealing ring, so as to ensure the stable operation of the crankshaft.

[0059] The split type design makes the detachable connection between the crankcase and the motor housing 16, so as to facilitate the assembly, disassembly and maintenance of the air compressor. The through hole, the first threaded hole 17, the second threaded hole 19 and the third threaded hole outside the circumferential side of the stepped piston hole 23 provide convenience for installing the protective cover and fixing the piston cylinder 5.

[0060] In summary, the split type oil-free air compressor crankcase and the air compressor applied thereto provided by the utility model have the advantages of optimizing the sealing performance, the heat dissipation effect, the convenience of installation and maintenance, the structural stability and the wide applicability, and significantly improving the overall performance of the air compressor. The split type oil-free air compressor crankcase has excellent sealing performance, efficient heat dissipation design and convenient maintenance and installation characteristics, is suitable for various air compressors which need to be efficiently and stably operated, has a wide application prospect and market value.

[0061] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0062] In addition, the technical solutions among various embodiments can be combined with each other, but must be based on the fact that a person of ordinary skill in the art can realize them; when the combination of technical solutions appears to be contradictory or unachievable, it shall be considered that the combination of technical solutions does not exist and is not within the protection scope required by the present application.

Claims

1. A split type oil-free air compressor crankcase, which is provided at both ends of a motor housing (16) and detachably connected with the motor housing (16), characterized in that, It comprises: left end cover (1) and right end cover (2) for sealing the crankcase and limiting the crankshaft; left crankcase (3) and right crankcase (4) for containing the crankshaft and crank connecting rod and providing the intake port, the upper part of the left crankcase (3) and right crankcase (4) is provided with piston cylinder (5); the first sealing ring (6) is arranged between the crankcase and the piston cylinder (5), which is used to prevent the blow-by between the crankcase and the piston cylinder (5); wherein, the inner side of the left end cover (1) and the right end cover (2) is provided with sealing surface, which cooperates with the left crankcase (3) and the right crankcase (4) through the sealing gasket (7), and is fixed through the connecting assembly (8), forming a sealed cavity structure.

2. The split type oil-free air compressor crankcase according to claim 1, characterized by, The left crankcase (3) and the right crankcase (4) are symmetrically arranged, and the left crankcase (3) and the right crankcase (4) are provided with intake holes (9) on one side, and the external airflow flows into the crankcase through the rotation of the crankshaft.

3. The split oil-free air compressor crankcase of claim 2, wherein, Under the action of the rotating force of the crankshaft, the external airflow flows into the piston cylinder (5) arranged at the upper part of the crankcase after rotating 270° around the crankshaft in the crankcase, and then is cooled.

4. The split oil-free air compressor crankcase of claim 1, wherein, The left end cover (1) and the right end cover (2) are provided with cooling mechanism, the cooling mechanism comprises blade (10) and shaft (11) for mounting blade, the blade (10) is rotatably mounted on the left end cover (1) and the right end cover (2) through the shaft (11).

5. The split oil-free air compressor crankcase of claim 1 or 4, wherein, The center of the left end cover (1) and the right end cover (2) is provided with crankshaft hole (12), the crankshaft hole (12) is provided with sealing ring mounting surface (13), shaft shoulder (14) and bearing mounting surface (15), the shaft shoulder (14) is used to limit the axial displacement of the bearing and the sealing ring.

6. The split oil-free air compressor crankcase of claim 1, wherein, The outer side of the sealing surface of the left end cover (1) and the right end cover (2) and the left crankcase (3) and the right crankcase (4) is provided with through hole and / or first threaded hole (17), which is used to install the protective cover of the protective cooling mechanism; the through hole and / or first threaded hole (17) is provided with multiple, which is respectively distributed around the outer side of the sealing surface of the left end cover (1) and the right end cover (2) and the left crankcase (3) and the right crankcase (4).

7. The split oil-free air compressor crankcase of claim 1, wherein, The mounting plate (18) arranged on the inner side of the left crankcase (3) and the right crankcase (4) is provided with through hole and second threaded hole (19), which is used to connect the motor shell (16); the center of the mounting plate (18) is provided with shaft mounting hole (20), the middle part of the shaft mounting hole (20) is provided with retainer (21), and the opening close to the crankshaft is provided with second sealing ring (22).

8. The split oil-free air compressor crankcase of claim 7, wherein, The top of the left crankcase (3) and the right crankcase (4) is provided with stepped piston hole (23), and the first sealing ring (6) is arranged at the stepped piston hole (23); the circumferential outer side of the stepped piston hole (23) is provided with through hole and / or third threaded hole (24), which is used to fix the piston cylinder (5).

9. An air compressor characterized by comprising: The split type oil-free air compressor crankcase is adopted.

Images