Pump head structure of air compressor

Abstract

The utility model relates to an air compressor pump head structure which comprises an air cylinder body, a pair of spiral rotors which are rotationally meshed with each other, a plurality of bearings and an exhaust seat and further comprises a separation assembly, a first annular groove is formed in the side face of the side, facing the exhaust seat, of the air cylinder body, and the first annular groove surrounds the initial end of an exhaust opening and the pair of spiral rotors; a sealing ring is detachably connected into the first annular groove, a second annular groove is formed in the side face of the side, away from the air cylinder body, of the sealing ring, an annular strip in interference fit with the second annular groove is arranged on the side face of the side, facing the air cylinder body, of the exhaust base, and the disengaging assembly is used for assisting the sealing ring to be disengaged from the first annular groove. The exhaust seat and the ring strip abut against the sealing ring. According to the air compressor exhaust seat, labyrinth sealing is achieved through cooperation of the first ring groove, the sealing ring and the ring strip, compared with an independent sealing ring, the sealing effect is further improved, the sealing performance between the exhaust seat and the air cylinder body can be improved, leakage of compressed air is reduced, and the efficiency of an air compressor is improved.

Description

Technical Field

[0001] The utility model relates to the field of air compressors, and particularly to a pump head structure of an air compressor. Background Art

[0002] An air compressor is a device used to compress gases. An air compressor is similar in structure to a water pump. Most air compressors are reciprocating piston type, rotary vane or rotary screw.

[0003] A screw air compressor generally includes a cylinder block, a pair of mutually rotating and meshing screw rotors, bearings, and an exhaust seat. The mutually meshing screw rotors are installed in the cylinder block, and the bearings of the screw rotor shafts are installed in the cylinder block and the exhaust seat. The exhaust seat is fixedly connected to the cylinder block by butt bolts. An exhaust port is provided on the exhaust seat. Low-pressure air enters the cylinder block through an air inlet pipe, and then is discharged through the exhaust port as the screw rotors rotate.

[0004] In actual use, the connection sealing performance between the exhaust seat and the cylinder block is very important. If there is a gap between the exhaust seat and the cylinder block, compressed gas is likely to leak from the gap, resulting in a decrease in the efficiency of the air compressor. Summary of the Utility Model

[0005] In order to improve the sealing performance between the exhaust seat and the cylinder block, the present application provides a pump head structure of an air compressor.

[0006] The pump head structure of an air compressor provided by the present application adopts the following technical solutions:

[0007] A pump head structure of an air compressor includes a cylinder block, a pair of mutually rotating and meshing screw rotors, several bearings, and an exhaust seat. The bearings are installed in the cylinder block and the exhaust seat. A pair of screw rotors are installed on the cylinder block and the exhaust seat through the bearings at both ends. The cylinder block is provided with an air inlet, and the exhaust seat is provided with an exhaust port. The structure further includes a detachment assembly. A first annular groove is formed on one side surface of the cylinder block facing the exhaust seat, and the first annular groove surrounds the starting end of the exhaust port and the pair of screw rotors.

[0008] A sealing ring is detachably connected in the first annular groove. A second annular groove is formed on one side surface of the sealing ring away from the cylinder block. A ring strip that is in interference fit with the second annular groove is provided on one side surface of the exhaust seat facing the cylinder block. The detachment assembly is used to assist the sealing ring to detach from the first annular groove. When the exhaust seat is installed, the exhaust seat and the ring strip both abut against the sealing ring.

[0009] By adopting the above technical solution, through the cooperation of the first annular groove, the sealing ring and the annular strip, labyrinth sealing is achieved. Compared with using a single sealing ring, the sealing effect is further enhanced, the sealing performance between the exhaust seat and the cylinder block can be improved, the leakage of compressed gas can be reduced, and the efficiency of the air compressor can be increased. At the same time, by providing a disengaging component, it can help the operator replace the sealing ring when the sealing ring is not carried out by the annular strip after the exhaust seat is disassembled, without having to pick out the sealing ring from the first annular groove, thus improving the replacement efficiency of the sealing ring.

[0010] Preferably, the disengaging component includes a top block and a sliding block. A sliding groove is formed on the bottom wall of the first annular groove. The top block slides on the sliding groove along the axial direction of the spiral rotor. A transverse groove communicating with the sliding groove is formed on the cylinder block. The sliding block slides in the transverse groove along a direction perpendicular to the sliding direction of the top block. The mutually approaching ends of the sliding block and the top block are provided with mutually cooperating first inclined surfaces. The top block is used to lift the sealing ring out of the first annular groove.

[0011] By adopting the above technical solution, when the exhaust seat is connected to the cylinder block, since the sealing ring abuts against the top block and the top block cannot move, the position of the sliding block is indirectly restricted. When the sealing ring needs to be removed, first disassemble the exhaust seat, and then the operator pushes the sliding block, and the sliding block drives the top block to lift the sealing ring.

[0012] Preferably, the first annular groove surrounds the transverse groove.

[0013] By adopting the above technical solution, the transverse groove is located within the first annular groove and will not affect its sealing effect.

[0014] Preferably, a gas guiding strip is provided in the cylinder block. The length direction of the gas guiding strip is arranged along the rotation axis direction of the spiral rotor. The gas guiding strip is located between the spiral rotor and the air inlet. The gas guiding strip is facing the meshing position of the two spiral rotors. Two second inclined surfaces are provided on the side surface of the gas guiding strip facing the air inlet, and the two second inclined surfaces are respectively inclined towards one side of the two spiral rotors.

[0015] By adopting the above technical solution, the gas guiding strip can respectively guide the gas entering the air inlet to the two spiral rotors, so that the bolt rotor can more directly and effectively transmit and compress the gas.

[0016] Preferably, the exhaust seat includes a front seat and a rear seat. The front seat is fixedly connected to the cylinder block by bolts. The rear seat is located on the side of the front seat away from the cylinder block and is fixedly connected to the front seat by bolts. The exhaust port is arranged on the front seat. The bearing is installed on the front seat. The ends of a pair of spiral rotors extend to the rear seat.

[0017] By adopting the above technical solution, it is convenient for lubrication, maintenance and replacement of the bearing on the front seat.

[0018] Preferably, the exhaust port is bent, and the end of the exhaust port away from the spiral rotor is arranged toward the side away from the cylinder block in a direction parallel to the axis of the spiral rotor.

[0019] By adopting the above technical solution, the orientation of the exhaust port can facilitate the operator to connect the air pipe.

[0020] Preferably, a threaded groove for connecting the air pipe is provided on the inner wall of the end of the exhaust port away from the spiral rotor.

[0021] The technical effects of the present utility model are mainly reflected in the following aspects:

[0022] 1. The cooperation between the first annular groove and the annular strip of the present utility model adopts the principle of labyrinth seal. Adding a sealing ring in the first annular groove can further enhance the sealing effect, improve the sealing performance between the exhaust seat and the cylinder block, reduce the leakage of compressed gas, and maintain the efficiency of the air compressor. At the same time, by setting the detachment component, it can help the operator replace the sealing ring after the service life of the sealing ring expires, without having to pick out the sealing ring from the first annular groove, thereby improving the replacement efficiency of the sealing ring;

[0023] 2. By setting the air guiding strip in the present utility model, the air guiding strip can guide the gas entering the air inlet to the two spiral rotors respectively, enabling the bolt rotor to more directly and effectively transmit and compress the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application.

[0025] Figure 2 is a schematic diagram of the connection between the cylinder block and the exhaust seat of an embodiment of the present application.

[0026] Figure 3 is a schematic diagram of the structure of the front seat of an embodiment of the present application.

[0027] Figure 4 is a schematic diagram of the assembly of the sealing ring and the first annular groove of an embodiment of the present application.

[0028] Figure 5 is a schematic diagram of the structure of the detachment component of an embodiment of the present application.

[0029] Figure 6 is a schematic diagram of the structure of the air guiding strip of an embodiment of the present application.

[0030] Description of reference numerals: 1. Cylinder block; 11. Air inlet; 12. Air guide strip; 121. Second inclined surface; 13. First annular groove; 131. Sealing ring; 132. Second annular groove; 14. Slide groove; 15. Transverse groove; 2. Spiral rotor; 4. Exhaust seat; 41. Front seat; 42. Rear seat; 43. Exhaust port; 431. Threaded groove; 44. Ring strip; 5. Detachment assembly; 51. Top block; 52. Slide block; 53. First inclined surface. Detailed implementation manners

[0031] The following further elaborates on the present application in conjunction with Figures 1-6 the accompanying drawings to make the technical solutions of the present application easier to understand and master.

[0032] An embodiment of the present application discloses a pump head structure of an air compressor.

[0033] Referring to Figures 1-3 , a pump head structure of an air compressor in this embodiment includes a cylinder block 1, a pair of mutually rotating and meshing spiral rotors 2, several bearings and an exhaust seat 4. The bearings are installed in the cylinder block 1 and the exhaust seat 4. A pair of spiral rotors 2 are installed on the cylinder block 1 and the exhaust seat 4 through the bearings at both ends. The cylinder block 1 is provided with an air inlet 11, and the exhaust seat 4 is provided with an exhaust port 43. It further includes a detachment assembly 5. A first annular groove 13 is formed on one side surface of the cylinder block 1 facing the exhaust seat 4. The first annular groove 13 encloses the starting end of the exhaust port 43 and a pair of spiral rotors 2.

[0034] Referring to Figures 2-4 , a sealing ring 131 is detachably connected in the first annular groove 13. A second annular groove 132 is formed on one side surface of the sealing ring 131 away from the cylinder block 1. A ring strip 44 that is in interference fit with the second annular groove 132 is provided on one side surface of the exhaust seat 4 facing the cylinder block 1. The detachment assembly 5 is used to assist the sealing ring 131 to detach from the first annular groove 13. After the exhaust seat 4 is installed, both the exhaust seat 4 and the ring strip 44 are pressed tightly against the sealing ring 131, and the sealing ring 131 wraps the ring strip 44 inside.

[0035] Referring to Figures 2-4 , through the cooperation of the first annular groove 13, the sealing ring 131 and the ring strip 44, labyrinth sealing is achieved. Compared with using a single sealing ring 131, the sealing effect is further enhanced, the sealing performance between the exhaust seat 4 and the cylinder block 1 can be improved, the leakage of compressed gas can be reduced, and the efficiency of the air compressor can be increased. At the same time, by providing the detachment assembly 5, it can help the operator replace the sealing ring 131 when the sealing ring 131 is not brought out by the ring strip 44 after the exhaust seat 4 is disassembled, without having to pick out the sealing ring 131 from the first annular groove 13, thus improving the replacement efficiency of the sealing ring 131.

[0036] Referring to Figure 4 and Figure 5, the separating component 5 includes a top block 51 and a slider 52. A chute 14 is formed on the bottom wall of the first annular groove 13. The top block 51 slides along the axis direction of the spiral rotor 2 on the chute 14. A transverse groove 15 communicating with the chute 14 is formed on the cylinder block 1. The slider 52 slides in the transverse groove 15 along a direction perpendicular to the sliding direction of the top block 51. The ends of the slider 52 and the top block 51 that are close to each other are provided with mutually cooperating first inclined surfaces 53. The top block 51 is used to lift the sealing ring 131 to separate it from the first annular groove 13.

[0037] Referring to Figure 2 , Figure 4 and Figure 5 , when the exhaust seat 4 is connected to the cylinder block 1, since the sealing ring 131 abuts against the top block 51, the top block 51 cannot move, which indirectly restricts the position of the slider 52. When it is necessary to remove the sealing ring 131, first disassemble the exhaust seat 4, and then the operator pushes the slider 52. The slider 52 drives the top block 51 to lift the sealing ring 131.

[0038] Referring to Figure 4 , the first annular groove 13 surrounds the transverse groove 15. The transverse groove 15 is located within the first annular groove 13 and will not affect its sealing effect.

[0039] Referring to Figure 6 , a gas guide bar 12 is provided in the cylinder block 1. The length direction of the gas guide bar 12 is arranged along the rotation axis direction of the spiral rotor 2. The gas guide bar 12 is located between the spiral rotor 2 and the air inlet 11. The gas guide bar 12 faces the meshing position of the two spiral rotors 2. Two second inclined surfaces 121 are formed on the side surface of the gas guide bar 12 facing the air inlet 11. The two second inclined surfaces 121 are respectively inclined towards one side of the two spiral rotors 2.

[0040] Referring to Figure 6 , the gas guide bar 12 can respectively guide the gas entering the air inlet 11 to the two spiral rotors 2, enabling the bolt rotor to more directly and effectively transmit and compress the gas.

[0041] Referring to Figure 2 , the exhaust seat 4 includes a front seat 41 and a rear seat 42. The front seat 41 is fixedly connected to the cylinder block 1 by bolts. The rear seat 42 is located on the side of the front seat 41 away from the cylinder block 1 and is fixedly connected to the front seat 41 by bolts. The ring strip 44 and the exhaust port 43 are both arranged on the front seat 41. The bearing is installed on the front seat 41. The ends of a pair of spiral rotors 2 extend to the rear seat 42. It is convenient for lubrication, maintenance and replacement of the bearing on the front seat 41.

[0042] Referring to Figure 1, the exhaust port 43 is bent, and the end of the exhaust port 43 far from the spiral rotor 2 is arranged towards the side away from the cylinder block 1 along the direction parallel to the axis of the spiral rotor 2. The orientation of the exhaust port 43 can facilitate the operator to connect the air pipe. A thread groove 431 for connecting the air pipe is provided on the inner wall of the end of the exhaust port 43 far from the spiral rotor 2.

[0043] Refer to Figure 6 , wherein the two spiral rotors 2 are respectively a driving rotor and a driven rotor, and the end of the driving rotor far from the exhaust seat 4 extends out of the cylinder block 1 for connecting to a power source such as a motor.

[0044] Of course, the above are only typical examples of this application. In addition, this application can also have many other specific implementation manners. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by this application.

Claims

1. An air compressor pump head structure, comprising a cylinder block (1), a pair of mutually rotating and meshing spiral rotors (2), several bearings and an exhaust seat (4), the bearings are installed in the cylinder block (1) and the exhaust seat (4), and a pair of spiral rotors (2) are installed on the cylinder block (1) and the exhaust seat (4) through the bearings at both ends. The cylinder block (1) is provided with an air inlet (11), and the exhaust seat (4) is provided with an exhaust port (43), and the characteristics are as follows: It further includes a separation component (5). A first annular groove (13) is formed on a side surface of the cylinder block (1) facing the exhaust seat (4). The first annular groove (13) encloses the starting end of the exhaust port (43) and a pair of spiral rotors (2). A sealing ring (131) is detachably connected in the first annular groove (13). A second annular groove (132) is formed on a side surface of the sealing ring (131) away from the cylinder block (1). A ring strip (44) which is in interference fit with the second annular groove (132) is provided on a side surface of the exhaust seat (4) facing the cylinder block (1). The separation component (5) is used to assist the sealing ring (131) to separate from the first annular groove (13). After the exhaust seat (4) is installed, both the exhaust seat (4) and the ring strip (44) are pressed tightly against the sealing ring (131).

2. The air compressor pump head structure according to claim 1, characterized in that: The separation component (5) includes a top block (51) and a sliding block (52). A sliding groove (14) is formed on the bottom wall of the first annular groove (13). The top block (51) slides on the sliding groove (14) along the axial direction of the spiral rotor (2). A transverse groove (15) communicating with the sliding groove (14) is formed on the cylinder block (1). The sliding block (52) slides in the transverse groove (15) along a direction perpendicular to the sliding direction of the top block (51). First inclined surfaces (53) which are matched with each other are formed at one ends of the sliding block (52) and the top block (51) close to each other. The top block (51) is used to jack up the sealing ring (131) to separate it from the first annular groove (13).

3. The air compressor pump head structure according to claim 2, characterized in that: The first annular groove (13) encloses the transverse groove (15).

4. A pump head structure of an air compressor according to claim 1, characterized in that: An air guiding strip (12) is arranged in the cylinder block (1). The length direction of the air guiding strip (12) is arranged along the rotation axis direction of the spiral rotor (2). The air guiding strip (12) is located between the spiral rotor (2) and the air inlet (11). The air guiding strip (12) is opposite to the meshing position of the two spiral rotors (2). Two second inclined surfaces (121) are formed on a side surface of the air guiding strip (12) facing the air inlet (11). The two second inclined surfaces (121) are respectively inclined towards one side of the two spiral rotors (2).

5. The air compressor pump head structure according to claim 1, characterized in that: The exhaust seat (4) includes a front seat (41) and a rear seat (42). The front seat (41) is fixedly connected with the cylinder block (1) by bolts. The rear seat (42) is located on a side of the front seat (41) away from the cylinder block (1) and is fixedly connected with the front seat (41) by bolts. The exhaust port (43) is arranged on the front seat (41). The bearing is installed on the front seat (41). The ends of a pair of spiral rotors (2) extend to the rear seat (42).

6. The air compressor pump head structure according to claim 1, characterized in that: The exhaust port (43) is bent. One end of the exhaust port (43) away from the spiral rotor (2) is arranged towards the side away from the cylinder block (1) along the direction parallel to the axis of the spiral rotor (2).

7. The air compressor pump head structure according to claim 6, characterized in that: A threaded groove (431) for connecting a trachea is formed on the inner wall of one end of the exhaust port (43) away from the spiral rotor (2).

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