Split type air compressor head

Abstract

The utility model provides a split type air compressor head, which belongs to the technical field of air compressors and comprises a head shell, a motor shell and a circumferential positioning component. A partition plate is arranged in the machine head shell and divides the interior of the machine head shell into a screw cavity and a gear cavity. One end of the machine head shell is a connecting end, and a communicating hole is formed in the connecting end; the output end of the motor shell is arranged at the connecting end of the machine head shell, and the motor shell is connected with the machine head shell through a fastening part. Wherein an output shaft of the motor extends into the gear cavity and is connected with the driving gear; the circumferential positioning part is connected to the output end of the motor shell; the circumferential positioning part is matched with the communicating hole in an inserting manner; compared with a connecting mode of a coupler in the prior art, the connecting mode can improve the installation precision, the situation that the transmission shaft of the screw compressor and the output shaft of the motor are not coaxial is avoided, and stable operation of the air compressor head can be guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of air compressors, and particularly relates to a split air compressor head. Background Art

[0002] An air compressor, that is, an air compressor, is an energy conversion device that converts mechanical energy into gas pressure energy; the air compressor is used as the main body of the air source device and uses the air compression principle to generate compressed air with a pressure exceeding the atmospheric pressure.

[0003] In the prior art, the head of a two-stage screw compressor includes a screw main body, a gearbox, and an electric motor; the gearbox is connected to the screw main body through a flange, a driving gear and a driven gear are rotatably arranged in the gearbox, and the driving gear and the driven gear mesh with each other; one end of the driven gear is connected to the screw through a key to ensure that the driven gear and the screw rotate synchronously; a transmission shaft is connected to the driving gear, and the transmission shaft passes through the gearbox; the transmission shaft is connected to the output shaft of the electric motor through a coupling; by driving the transmission shaft to rotate through the output shaft of the electric motor, the driving gear can drive the driven gear to rotate, and then drive the screw to rotate, realizing the compression process.

[0004] The above connection method through the coupling is prone to the problem that the output shaft of the electric motor and the transmission shaft of the screw compressor are not coaxial, which will affect subsequent use. Summary of the Utility Model

[0005] An embodiment of the utility model provides a split air compressor head, aiming to solve the technical problem that the transmission shaft of the screw compressor and the output shaft of the electric motor are connected through a coupling in the prior art and are prone to non-coaxiality.

[0006] To achieve the above object, the technical solution adopted by the utility model is:

[0007] A split air compressor head is provided, including: a head housing with a partition inside, the partition dividing the interior of the head housing into a screw cavity and a gear cavity; one end of the head housing is a connection end, and the connection end is provided with a communication hole communicating with the gear cavity;

[0008] An electric motor housing, the output end of which is arranged at the connection end of the head housing, and the electric motor housing is connected to the head housing through fastening components;

[0009] A circumferential positioning component, connected to the output end of the electric motor housing; the circumferential positioning component is inserted and matched with the communication hole, and the outer peripheral wall of the circumferential positioning component fits with the inner peripheral wall of the communication hole.

[0010] In a possible implementation manner, an installation ring is connected to the outer peripheral wall of the output end of the electric motor housing, and a plurality of installation holes are arranged at intervals along the circumference of the installation ring;

[0011] The connecting end of the machine head housing has threaded holes corresponding to the mounting holes one by one, and the motor housing is connected to the machine head housing by bolts.

[0012] In a possible implementation manner, the circumferential positioning member includes a positioning ring, and the positioning ring is fixed on the motor housing.

[0013] In a possible implementation manner, the circumferential positioning member further includes a plurality of rib plates. Each rib plate is fixedly arranged at the output end of the motor housing, and one side of each rib plate is connected to the inner peripheral wall of the positioning ring.

[0014] In a possible implementation manner, the output end of the motor housing is in sealing fit with the connecting end of the machine head housing; a sleeve is connected to the output end of the motor housing. One end of the sleeve is located outside the motor housing, and the other end of the sleeve is located inside the motor housing;

[0015] Wherein, the output shaft of the motor can pass through the sleeve, and a sealing structure is provided between the inner side end of the sleeve and the output shaft.

[0016] In a possible implementation manner, the sealing structure includes a sealing ring. The sealing ring is connected inside the sleeve, and the outer peripheral wall of the sealing ring contacts the inner peripheral wall of the sleeve, and the inner peripheral wall of the sealing ring contacts the outer peripheral wall of the output shaft; wherein, sealing rings are provided on both the outer peripheral wall and the inner peripheral wall of the sealing ring.

[0017] In a possible implementation manner, a bearing is provided inside the sleeve, and the bearing is located outside the sealing structure so that the bearing is immersed in the oil in the gear chamber.

[0018] In a possible implementation manner, the partition plate has a receiving cavity on one side of the gear chamber. The output shaft of the motor can extend into the receiving cavity and is in rotational fit with the receiving cavity; one end of the screw passes through the partition plate and is located inside the gear chamber;

[0019] Wherein, a driving gear and a driven gear are rotatably provided in the gear chamber, and the driving gear and the driven gear are meshed with each other; the driving gear is connected to the output shaft of the motor, and the driven gear is connected to the passing-out end of the screw.

[0020] In a possible implementation manner, the driving gear is connected to the output shaft of the motor by a key, and a limiting member for axially limiting the driving gear is provided on the output shaft of the motor.

[0021] In a possible implementation manner, a stepped surface is provided on the output shaft of the motor, and an external thread is also provided on the output shaft of the motor;

[0022] The limiting component includes a top ring and a fixing ring. One end of the top ring contacts the step surface, and the other end of the top ring contacts the inner side of the driving gear; the fixing ring is in threaded fit with the output shaft, and one side of the fixing ring contacts the outer side of the driving gear.

[0023] Compared with the prior art, in the split air compressor head provided by the present utility model, the driving gear is connected to the output shaft of the motor, and the motor housing and the head housing are positioned by the circumferential positioning component, which can ensure the accuracy of the installation position of the driving gear and improve the installation precision; after the motor housing and the head housing are positioned, the motor housing is fixed to the head housing through the fastening component. Compared with the connection method of the coupling in the prior art, the above connection method of the present application can improve the installation precision, avoid the situation that the transmission shaft of the screw compressor is not coaxial with the output shaft of the motor, and can ensure the stable operation of the air compressor head; in addition, in the traditional gear connection method, that is, the gearbox and the screw main unit are connected by bolts, and then the motor is installed on the gearbox; in the above traditional gear connection method during production and manufacturing, a set of molds are required for the screw main unit housing, the gearbox housing, and the motor housing respectively, so three sets of molds are needed; while the technical solution of the present application only requires two sets of molds, and the motor in the technical solution of the present application can be an IP54 motor; therefore, compared with the traditional gear connection method, the technical solution of the present application can reduce the production and manufacturing cost. Brief Description of the Drawings

[0024] Figure 1 It is a schematic diagram of a split air compressor head provided by an embodiment of the present utility model;

[0025] Figure 2 It is a sectional view of a split air compressor head provided by an embodiment of the present utility model;

[0026] Figure 3 It is Figure 2 an enlarged schematic view of part A in

[0027] Figure 4 It is Figure 2 an enlarged schematic view of part B in

[0028] Figure 5 It is a schematic diagram of the head housing part of a split air compressor head provided by an embodiment of the present utility model;

[0029] Figure 6 It is a schematic diagram of the circumferential positioning component of a split air compressor head provided by an embodiment of the present utility model;

[0030] Figure 7 It is a schematic diagram of the top ring and fixing ring part of a split air compressor head provided by an embodiment of the present utility model;

[0031] Figure 8A cross-sectional view of the first-stage compression space and the second-stage compression space of a split air compressor head provided by an embodiment of the present utility model.

[0032] Explanation of reference numerals: 1, head housing; 11, partition; 12, screw cavity; 13, gear cavity; 14, connection end; 15, communication hole; 16, first-stage compression space; 17, second-stage compression space; 18, accommodation cavity; 2, motor housing; 21, output shaft; 22, cooling fan; 23, cooling fins; 24, protective cover; 25, air inlet hole; 26, step surface; 27, top ring; 28, fixing ring; 29, mounting ring; 3, circumferential positioning member; 31, positioning ring; 32, rib plate; 4, driving gear; 5, driven gear; 6, sleeve; 7, sealing ring. Detailed implementation manners

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0034] Please refer to Figures 1 to 8 together, and now a split air compressor head provided by the present utility model will be described. The split air compressor head includes a head housing 1, a motor housing 2 and a circumferential positioning member 3; a partition 11 is provided inside the head housing 1, and the partition 11 divides the interior of the head housing 1 into a screw cavity 12 and a gear cavity 13; one end of the head housing 1 is a connection end 14, and a communication hole 15 communicating with the gear cavity 13 is provided on the connection end 14; the output end of the motor housing 2 is arranged at the connection end 14 of the head housing 1, and the motor housing 2 and the head housing 1 are connected by fastening members; wherein, the output shaft 21 of the motor can extend into the gear cavity 13 and is connected to the driving gear 4; the circumferential positioning member 3 is connected to the output end of the motor housing 2; the circumferential positioning member 3 is in plug-in fit with the communication hole 15, and the outer peripheral wall of the circumferential positioning member 3 is attached to the inner peripheral wall of the communication hole 15.

[0035] For the split air compressor head provided by the present utility model, compared with the prior art, the driving gear 4 is connected to the output shaft 21 of the motor, and the motor housing 2 and the head housing 1 are positioned by the circumferential positioning member 3, which can ensure the accuracy of the installation position of the driving gear 4 and improve the installation accuracy; after the motor housing 2 and the head housing 1 are positioned, the motor housing 2 is fixed on the head housing 1 by fastening members. Compared with the coupling connection method in the prior art, the above connection method of the present application can improve the installation accuracy, avoid the situation that the transmission shaft of the screw compressor is not coaxial with the output shaft 21 of the motor, and can ensure the stable operation of the air compressor head.

[0036] Exemplarily, the figure shows the head of a two-stage screw compressor. Inside the screw cavity 12, there is a first-stage compression space 16 and a second-stage compression space 17. Both the first-stage compression space 16 and the second-stage compression space 17 have an air inlet and an air outlet, and screws are rotatably arranged inside both the first-stage compression space 16 and the second-stage compression space 17. Among them, the air inlet of the first-stage compression space 16 is communicated with the outside of the head housing 1, the air outlet of the first-stage compression space 16 is communicated with the air inlet of the second-stage compression space 17, and the air outlet of the second-stage compression space 17 is communicated with the outside of the head housing 1. Through the above settings, a two-stage compression process can be achieved. Inside the motor housing 2, there is a stator and a rotor. One end of the rotor extends out of the motor housing 2 to form an output shaft 21. The working principles of the stator and the rotor are prior arts and will not be elaborated here.

[0037] Exemplarily, a cooling fan 22 is provided at one end of the motor housing 2 opposite to the output end. The output shaft 21 passes through the other end of the motor housing 2 and is connected to the cooling fan 22. During the rotation of the output shaft 21, the cooling fan 22 can be driven to rotate simultaneously, thereby realizing the cooling process. On the outer peripheral wall of the motor housing 2, there are a number of cooling fins 23. The number of cooling fins 23 is arranged at intervals along the circumferential direction of the motor housing 2, and each cooling fin 23 is arranged along the axial direction of the motor housing 2. A protective cover 24 is also connected to the motor housing 2. The protective cover 24 is connected to the end of the motor housing 2 and makes the cooling fan 22 located inside the protective cover 24. The end of the protective cover 24 has a number of air inlet holes 25.

[0038] In some embodiments, as Figures 1 to 8 shown, on one side of the gear cavity 13, the partition 11 has a receiving cavity 18. The output shaft 21 of the motor can extend into the receiving cavity 18 and is rotatably matched with the receiving cavity 18. One end of the screw passes through the partition 11 and is located inside the gear cavity 13. Among them, a driving gear 4 and a driven gear 5 are rotatably arranged inside the gear cavity 13, and the driving gear 4 and the driven gear 5 mesh with each other. The driving gear 4 is connected to the output shaft 21 of the motor, and the driven gear 5 is connected to the protruding end of the screw.

[0039] It should be noted that by providing the receiving cavity 18 on the partition 11, after the motor housing 2 is installed in place, the output shaft 21 of the motor is located inside the receiving cavity 18, and a bearing is provided between the output shaft 21 of the motor and the receiving cavity 18. Through the above settings, the free end of the output shaft 21 of the motor can be supported, and the stability of the output shaft 21 of the motor during rotation can be improved. By directly driving the driving gear 4 to rotate through the output shaft 21, the coaxiality error between the driving gear 4 and the output shaft 21 can be reduced. After the driving gear 4 rotates, the driven gear 5 can be driven to rotate, and then the screw rotates to compress the air.

[0040] In some embodiments, asFigures 1 to 8 As shown, the driving gear 4 is key-connected to the output shaft 21 of the motor, and a limiting member for axially limiting the driving gear 4 is provided on the output shaft 21 of the motor; a stepped surface 26 is provided on the output shaft 21 of the motor, and an external thread is also provided on the output shaft 21 of the motor; the limiting member includes a top ring 27 and a fixing ring 28, one end of the top ring 27 contacts the stepped surface 26, and the other end of the top ring 27 contacts the inner side of the driving gear 4; the fixing ring 28 is in threaded fit with the output shaft 21, and one side of the fixing ring 28 contacts the outer side of the driving gear 4.

[0041] Exemplarily, when installing the driving gear 4, first sleeved the top ring 27 on the output shaft 21, then sleeved the driving gear 4 on the output shaft 21, and finally through the threaded fit between the fixing ring 28 and the output shaft 21, the driving gear 4 can be restricted on the output shaft 21; after installing the motor housing 2 onto the head housing 1, the outer side of the fixing ring 28 contacts the inner ring end of the bearing in the receiving cavity 18 to axially limit the position of the fixing ring 28, reduce the axial movement of the fixing ring 28, and further reduce the axial movement of the driving gear 4.

[0042] In some embodiments, as Figures 1 to 8 shown, an installation ring 29 is connected to the outer peripheral wall of the output end of the motor housing 2, and a plurality of installation holes are provided on the installation ring 29 at intervals along its circumferential direction; the connection end 14 of the head housing 1 has threaded holes corresponding to the installation holes one by one, and the motor housing 2 and the head housing 1 are connected by bolts.

[0043] It should be noted that the fastening member includes bolts; after positioning the position of the motor housing 2 through the circumferential positioning member 3, align the installation holes with the threaded holes of the head housing 1. At this time, the threaded end of the bolt passes through the installation hole and is in threaded fit with the threaded hole of the head housing 1, and the motor housing 2 can be fixed on the head housing 1.

[0044] In some embodiments, as Figures 1 to 8 shown, the output end of the motor housing 2 is in sealing fit with the connection end 14 of the head housing 1; a sleeve 6 is connected to the output end of the motor housing 2, one end of the sleeve 6 is located outside the motor housing 2, and the other end of the sleeve 6 is located inside the motor housing 2; wherein, the output shaft 21 of the motor can pass through the sleeve 6, and a sealing structure is provided between the inner side end of the sleeve 6 and the output shaft 21.

[0045] It should be noted that oil needs to be added to the gear cavity 13 to ensure the normal operation of the gears. An oil injection hole is provided on the head housing 1 at the position of the gear cavity 13. The oil injection hole has an internal thread, and a sealing bolt that is in threaded fit with the oil injection hole is provided on the head housing 1; when the sealing bolt is connected to the oil injection hole, raw tape is wound around the threaded section of the sealing bolt, or sealing glue is applied to ensure the sealing performance of the oil injection hole position and reduce the leakage of oil.

[0046] In some embodiments, as Figures 1 to 8 shown, the sealing structure includes a sealing ring 7. The sealing ring 7 is connected to the inside of the sleeve 6, and the outer peripheral wall of the sealing ring 7 contacts the inner peripheral wall of the sleeve 6, and the inner peripheral wall of the sealing ring 7 contacts the outer peripheral wall of the output shaft 21. Wherein, sealing rings are provided on both the outer peripheral wall and the inner peripheral wall of the sealing ring 7. A bearing is provided inside the sleeve 6, and the bearing is located outside the sealing structure so that the bearing is immersed in the oil in the gear chamber 13.

[0047] Exemplarily, a gasket is provided at the connection position between the motor housing 2 and the machine head housing 1, which can ensure the sealing performance between the motor housing 2 and the machine head housing 1 and reduce the oil leakage from this position. By providing a sealing structure at the inner end of the sleeve 6, the oil can be reduced from entering the motor interior; the sealing ring can achieve a good sealing effect and reduce the situation of oil entering the motor. By arranging the bearing outside the sealing structure, the bearing can be immersed in the oil, which can lubricate the bearing and facilitate the normal operation of the bearing.

[0048] In some embodiments, as Figures 1 to 8 shown, the circumferential positioning member 3 includes a positioning ring 31, and the positioning ring 31 is fixed to the motor housing 2. The circumferential positioning member 3 further includes a plurality of rib plates 32, and each rib plate 32 is fixedly arranged at the output end of the motor housing 2, and one side of each rib plate 32 is connected to the inner peripheral wall of the positioning ring 31.

[0049] It should be noted that the rib plate 32 is connected to the outer end of the sleeve 6. Through the above arrangement, the connection strength between the positioning ring 31 and the motor housing 2 can be improved, and the situation of damage to the positioning ring 31 can be reduced, so as to facilitate the positioning ring 31 to position the motor housing 2.

[0050] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A split air compressor head, characterized in that: include: A head housing has a partition plate inside, wherein the partition plate divides the interior of the head housing into a screw chamber and a gear chamber; One end of the head housing is a connecting end, and the connecting end has a connecting hole connected to the gear cavity; A motor housing, the output end of which is arranged at the connection end of the head housing, and the motor housing is connected to the head housing through a fastening component; wherein the output shaft of the motor can extend into the gear cavity and be connected to the driving gear; A circumferential positioning component is connected to the output end of the motor housing; the circumferential positioning component is plug-fitted with the connecting hole, and the outer peripheral wall of the circumferential positioning component is in contact with the inner peripheral wall of the connecting hole.

2. A split type air compressor head as claimed in claim 1, characterized in that: The outer peripheral wall of the output end of the motor housing is connected to a mounting ring, and the mounting ring is provided with a plurality of mounting holes spaced apart along its circumference; The connecting end of the head housing has threaded holes corresponding to the mounting holes one by one, and the motor housing is connected to the head housing by bolts.

3. A split type air compressor head as claimed in claim 1, characterized in that: The circumferential positioning component includes a positioning ring, and the positioning ring is fixed on the motor housing.

4. A split type air compressor head as claimed in claim 3, characterized in that: The circumferential positioning component also includes a plurality of ribs, each of which is fixedly arranged at the output end of the motor housing, and one side of each of which is connected to the inner circumferential wall of the positioning ring.

5. A split type air compressor head as claimed in claim 1, characterized in that: The output end of the motor housing is sealed with the connection end of the head housing; the output end of the motor housing is connected to a sleeve, one end of the sleeve is located outside the motor housing, and the other end of the sleeve is located inside the motor housing; The output shaft of the motor can pass through the sleeve, and a sealing structure is provided between the inner end of the sleeve and the output shaft.

6. A split type air compressor head as claimed in claim 5, characterized in that: The sealing structure includes a sealing ring, which is connected to the inside of the sleeve, and the outer peripheral wall of the sealing ring contacts the inner peripheral wall of the sleeve, and the inner peripheral wall of the sealing ring contacts the outer peripheral wall of the output shaft; wherein the outer peripheral wall and the inner peripheral wall of the sealing ring are both provided with sealing rings.

7. A split type air compressor head as claimed in claim 5, characterized in that: A bearing is arranged in the sleeve and is located outside the sealing structure so that the bearing is immersed in the oil in the gear cavity.

8. A split type air compressor head as claimed in claim 1, characterized in that: The partition has a receiving cavity on one side of the gear cavity, and the output shaft of the motor can extend into the receiving cavity and rotate with the receiving cavity; one end of the screw passes through the partition and is located in the gear cavity; Among them, a driving gear and a driven gear are rotatably arranged in the gear cavity, and the driving gear and the driven gear are meshed with each other; the driving gear is connected to the output shaft of the motor, and the driven gear is connected to the outlet end of the screw.

9. A split type air compressor head as claimed in claim 8, characterized in that: The driving gear is connected to the output shaft of the motor through a key, and the output shaft of the motor is provided with a limiting component for axially limiting the driving gear.

10. A split type air compressor head as claimed in claim 9, characterized in that: The output shaft of the motor is provided with a step surface, and the output shaft of the motor is also provided with an external thread; The limiting component includes a top ring and a fixed ring, one end of the top ring contacts the step surface, and the other end of the top ring contacts the inner side of the driving gear; the fixed ring is threadedly matched with the output shaft, and one side of the fixed ring contacts the outer side of the driving gear.

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