A mechanical seal structure for the exhaust end of an oil-free screw compressor

Abstract

The utility model discloses a mechanical seal structure for the exhaust end of an oil-free screw machine, comprising a male rotor body, a female rotor body, a rotor seat and a gear box, wherein the gear box is installed and connected on the rear end circumferential side of the rotor seat, the gear box and the rotor seat are provided with a male rotor body inside, the circumferential side of the male rotor body is located in the gear box and the rotor seat, and the female rotor body is provided inside, the front end circumferential side of the male rotor body is provided with a male rotor suction end air seal, the outer side of the male rotor suction end air seal is located on the male rotor body, and a male rotor suction end oil seal is provided, the rear end circumferential side of the male rotor body is provided with a male rotor exhaust end seal, the outer side of the male rotor exhaust end seal is located on the male rotor body, and a male rotor exhaust end oil seal is provided, through the mechanical sealing of the male rotor exhaust end seal and the female rotor exhaust end seal, the machine has high temperature resistance, can effectively reduce the whistling noise and improve the safety of use.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-free screw machines, in particular to a mechanical sealing structure at the exhaust end of an oil-free screw machine. Background Art

[0002] On-board oil-free screw air compressors are mainly used to transport granular materials such as cement, lime powder, and feed. They are commonly used transportation devices in mines, chemical plants, and tank trucks and ships. Dry screw air compressors inhale ambient air into the rotor cavity through the air filter at the suction end. After the rotation of the yin and yang rotors, the compressed air is discharged from the butterfly-shaped port in the rotor cavity to the exhaust end to obtain the required oil-free clean compressed air.

[0003] The existing screw air compressor uses traditional rubber for sealing, which cannot effectively withstand high temperatures during use. In addition, a whistling noise is generated inside the compressor during use, and the seal of the high-pressure area is not very safe during use.

[0004] Therefore, a new mechanical seal structure at the exhaust end of an oil-free screw compressor is proposed to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide an oil-free screw machine exhaust end mechanical seal structure to solve the problems raised in the above background technology that the existing screw air compressor uses traditional rubber for sealing during sealing, which cannot effectively withstand high temperatures during use, and generates whistling noise inside during use, and the high-pressure zone seal is not very safe during use.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an oil-free screw machine exhaust end mechanical seal structure, comprising a male rotor body, a female rotor body, a rotor seat and a gear box, wherein the gear box is installed and connected to the rear end circumferential side of the rotor seat, the male rotor body is arranged inside the gear box and the rotor seat, the circumferential side of the male rotor body is located inside the gear box and the rotor seat, the female rotor body is arranged inside, the front end circumferential side of the male rotor body is arranged with a male rotor suction end gas seal, and the outer side of the male rotor suction end gas seal is arranged on the male rotor body. The positive rotor suction end oil seal, the positive rotor exhaust end seal is arranged on the rear end circumferential side of the positive rotor body, the outer side of the positive rotor exhaust end seal is located on the positive rotor body and a positive rotor exhaust end oil seal is arranged, the positive rotor suction end air seal is arranged on the front end circumferential side of the negative rotor body, the outer side of the negative rotor suction end air seal is located on the negative rotor body and a negative rotor suction end oil seal is arranged, the negative rotor exhaust end seal is arranged on the rear end circumferential side of the negative rotor body, the outer side of the negative rotor exhaust end seal is located on the negative rotor body and a negative rotor exhaust end oil seal is arranged.

[0007] Wherein, a sealant is arranged between the exhaust end seal of the male rotor and the rotor seat, and the exhaust end seal of the male rotor is a six-straight groove seal structure.

[0008] Among them, the male rotor exhaust end seal includes a male exhaust end oil seal housing, a male exhaust end oil seal straight groove, a middle air vent and a male exhaust end oil seal rear mounting groove. A middle air vent is provided in the middle of the inner side of the male exhaust end oil seal housing, the rear side of the middle air vent is located on the male exhaust end oil seal housing and a male exhaust end oil seal rear mounting groove is provided, the front side of the middle air vent is located on the male exhaust end oil seal housing and a male exhaust end oil seal straight groove is provided, and the male exhaust end oil seal housing is connected to the male rotor body.

[0009] Among them, the seal of the exhaust end of the female rotor includes a female exhaust end air seal straight groove, an inner air vent, a female exhaust end air seal rear installation groove and a female exhaust end air seal shell. The inner side of the female exhaust end air seal shell is provided with an inner air vent, the rear side of the inner air vent is located on the female exhaust end air seal shell and a female exhaust end air seal rear installation groove is provided, the front side of the inner air vent is located on the female exhaust end air seal shell and a female exhaust end air seal straight groove is provided, and the female exhaust end air seal shell is connected to the female rotor body.

[0010] Wherein, the air seal at the suction end of the male rotor and the oil seal at the suction end of the male rotor are installed and connected to the suction end of the male rotor body.

[0011] Wherein, the air seal at the suction end of the female rotor and the oil seal at the suction end of the female rotor are installed and connected to the suction end of the female rotor body.

[0012] Wherein, the male rotor exhaust end seal is installed on the rotor seat and the exhaust end of the male rotor body.

[0013] Wherein, the exhaust end of the female rotor is sealed and installed on the exhaust end of the rotor seat and the female rotor body.

[0014] In summary, due to the adoption of the above technology, the beneficial effects of the utility model are:

[0015] 1. In the utility model, a sealing structure is provided at the exhaust end of the male rotor, so that the howling noise can be reduced. In addition, the mechanical material is more durable and high temperature resistant than rubber. The male exhaust end oil seal shell of the male rotor exhaust end seal passes through the male exhaust end oil seal straight groove and the male exhaust end oil seal rear mounting groove area, so that it can be sleeved on the circumferential side of the male rotor body. The male exhaust end oil seal straight groove has six straight grooves, so that the high-pressure gas in the gap of the male exhaust end oil seal shell can be decompressed in layers to prevent a loud howling sound. The male exhaust end oil seal shell passes through the middle air vent area, so that the gas can be discharged from the air vent to prevent the air pressure from impacting the oil seal and causing a safety hazard.

[0016] 2. In the utility model, a sealing structure is provided at the exhaust end of the female rotor, so that the howling noise can be reduced, and the mechanical material is more durable and high temperature resistant than rubber. The female exhaust end air seal shell of the female rotor exhaust end seal can be installed on the circumferential side of the female rotor body through the area of ​​the female exhaust end air seal straight groove and the female exhaust end air seal rear mounting groove. There are a total of six female exhaust end air seal straight grooves, which can relieve the high-pressure gas in layers to prevent a loud howling sound, and the area of ​​the inner air vent allows the gas to be discharged from the air vent to prevent the air pressure from impacting the oil seal and causing a safety hazard. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the side cross-section structure of a mechanical seal structure at the exhaust end of an oil-free screw compressor of the utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the A region of the mechanical seal structure at the exhaust end of an oil-free screw compressor of the utility model;

[0019] Figure 3 It is a schematic diagram of the oil seal structure of the male rotor suction end of an oil-free screw compressor exhaust end mechanical seal structure of the utility model;

[0020] Figure 4 The utility model is a schematic diagram of the gas seal structure of the female rotor suction end of the mechanical seal structure of the exhaust end of an oil-free screw compressor.

[0021] In the figure: 1. male rotor body; 2. male rotor suction end gas seal; 3. male rotor suction end oil seal; 31. male exhaust end oil seal housing; 32. male exhaust end oil seal straight groove; 33. middle air vent; 34. male exhaust end oil seal rear mounting groove; 4. male rotor exhaust end seal; 5. male rotor exhaust end oil seal; 6. female rotor body; 7. female rotor suction end gas seal; 71. female exhaust end gas seal straight groove; 72. inner air vent; 73. female exhaust end gas seal rear mounting groove; 74. female exhaust end gas seal housing; 8. female rotor suction end oil seal; 9. female rotor exhaust end seal; 10. female rotor exhaust end oil seal; 11. rotor seat; 12. gear box; 13. sealant. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0023] Embodiment 1

[0024] Reference Figure 1-Figure 3 A mechanical seal structure for the exhaust end of an oil-free screw compressor comprises a male rotor body 1, a female rotor body 6, a rotor seat 11 and a gear box 12. The gear box 12 is installed and connected to the rear end circumference of the rotor seat 11. The male rotor body 1 is arranged inside the gear box 12 and the rotor seat 11. The female rotor body 6 is arranged inside the gear box 12 and the rotor seat 11. The male rotor suction end gas seal 2 is arranged on the front end circumference of the male rotor body 1. The outer side of the male rotor suction end gas seal 2 is arranged on the male rotor body 1. End oil seal 3, a male rotor exhaust end seal 4 is arranged on the rear end circumferential side of the male rotor body 1, and a male rotor exhaust end oil seal 5 is arranged on the outer side of the male rotor exhaust end seal 4, a female rotor suction end air seal 7 is arranged on the front end circumferential side of the female rotor body 6, and a female rotor suction end oil seal 8 is arranged on the outer side of the female rotor suction end air seal 7, and a female rotor exhaust end seal 9 is arranged on the rear end circumferential side of the female rotor body 6, and a female rotor exhaust end oil seal 10 is arranged on the outer side of the female rotor exhaust end seal 9, which is located on the female rotor body 6.

[0025] In the present invention, a sealant 13 is provided between the male rotor exhaust end seal 4 and the rotor seat 11, thereby effectively enhancing the sealing performance.

[0026] In the utility model, the male rotor exhaust end seal 4 includes a male exhaust end oil seal housing 31, a male exhaust end oil seal straight groove 32, an intermediate air vent 33 and a male exhaust end oil seal rear mounting groove 34. The inner middle of the male exhaust end oil seal housing 31 is provided with an intermediate air vent 33. The rear side of the intermediate air vent 33 is located on the male exhaust end oil seal housing 31 and a male exhaust end oil seal rear mounting groove 34 is provided. The front side of the intermediate air vent 33 is located on the male exhaust end oil seal housing 31 and a male exhaust end oil seal straight groove 32 is provided. The male exhaust end oil seal housing 31 is connected to the male rotor. On the main body 1, the male exhaust end oil seal shell 31 of the male rotor exhaust end seal 4 passes through the male exhaust end oil seal straight groove 32 and the male exhaust end oil seal rear mounting groove 34, so that it can be sleeved on the circumferential side of the male rotor body 1. The male exhaust end oil seal straight groove 32 is a six-way straight groove, so that the high-pressure gas in the gap of the male exhaust end oil seal shell 31 can be decompressed in layers to prevent a loud whistling sound. The male exhaust end oil seal shell 31 passes through the area of ​​the middle air vent 33, so that the gas can be discharged from the air vent to prevent the air pressure from impacting the oil seal and causing a safety hazard.

[0027] In the utility model, the air seal 2 at the suction end of the male rotor and the oil seal 3 at the suction end of the male rotor are installed and connected to the suction end of the male rotor body 1, so that they can be installed correspondingly to form a sealing mode of oil seal and air seal.

[0028] In the utility model, the air seal 7 at the suction end of the female rotor and the oil seal 8 at the suction end of the female rotor are installed and connected to the suction end of the female rotor body 6, so that they can be installed correspondingly to form a sealing mode of oil seal and air seal.

[0029] In the present invention, the male rotor exhaust end seal 4 is installed on the rotor seat 11 and the exhaust end of the male rotor body 1, so that a mechanical seal can be formed to meet the sealing method of the high pressure area.

[0030] In the present invention, the female rotor exhaust end seal 9 is installed on the rotor seat 11 and the exhaust end of the female rotor body 6, so that a mechanical seal can be formed to meet the sealing method of the high pressure area.

[0031] Working principle: When in use, the suction end of the male rotor body 1 is sealed by the male rotor suction end air seal 2 and the male rotor suction end oil seal 3, and the suction end of the female rotor body 6 is sealed by the female rotor suction end air seal 7 and the female rotor suction end oil seal 8, so that the suction ends of the male rotor body 1 and the female rotor body 6 are sealed by oil seal and air seal, then this is a low-pressure area, the oil seal and the air seal are both lip seals made of rubber material, the exhaust end of the male rotor body 1 is sealed by the male rotor exhaust end seal 4 and the male rotor exhaust end oil seal 5, the exhaust end of the female rotor body 6 is sealed by the female rotor exhaust end seal 9 and the female rotor exhaust end oil seal 10, the male rotor exhaust end seal 4 and the female rotor exhaust end seal 9 are mechanical seals, and the layered mechanical seals can make the high-pressure gas in the gap decompress in layers to prevent a loud whistling sound, so that through the sealing structure of the mechanical seal and the oil seal, this is a high-pressure area, thereby forming high and low pressure areas for use.

[0032] Embodiment 2

[0033] Reference Figure 1 and Figure 4 , a mechanical seal structure for the exhaust end of an oil-free screw machine. Compared with the first embodiment, the female rotor exhaust end seal 9 in this embodiment includes a female exhaust end air seal straight groove 71, an inner air vent 72, a female exhaust end air seal rear mounting groove 73 and a female exhaust end air seal shell 74. The inner side of the female exhaust end air seal shell 74 is provided with an inner air vent 72, the rear side of the inner air vent 72 is located at the female exhaust end air seal shell 74 and is provided with a female exhaust end air seal rear mounting groove 73, the front side of the inner air vent 72 is located at the female exhaust end air seal shell 74 and is provided with a female exhaust end air seal straight groove 71, and the female exhaust end air seal shell 74 is connected to the female rotor body 6.

[0034] Working principle: The female exhaust end air seal shell 74 of the female rotor exhaust end seal 9 can be installed on the circumferential side of the female rotor body 6 through the area of ​​the female exhaust end air seal straight groove 71 and the female exhaust end air seal rear mounting groove 73. There are a total of six female exhaust end air seal straight grooves 71, which can relieve the high-pressure gas in layers to prevent loud whistling sounds, and the area of ​​the inner air hole 72 allows the gas to be discharged from the air hole to prevent the air pressure from impacting the oil seal and causing safety hazards.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Claims

1. A mechanical seal structure for an exhaust end of an oil-free screw compressor, comprising a male rotor body (1), a female rotor body (6), a rotor seat (11) and a gear box (12), wherein the gear box (12) is mounted and connected to the rear end circumferential side of the rotor seat (11), the male rotor body (1) is arranged inside the gear box (12) and the rotor seat (11), and the female rotor body (6) is arranged on the circumferential side of the male rotor body (1) inside the gear box (12) and the rotor seat (11), characterized in that: A positive rotor suction end gas seal (2) is arranged on the front circumferential side of the positive rotor body (1), and a positive rotor suction end oil seal (3) is arranged on the outer side of the positive rotor suction end gas seal (2) and located on the positive rotor body (1); a positive rotor exhaust end seal (4) is arranged on the rear circumferential side of the positive rotor body (1), and a positive rotor exhaust end oil seal (5) is arranged on the outer side of the positive rotor exhaust end seal (4) and located on the positive rotor body (1); a negative rotor suction end gas seal (7) is arranged on the front circumferential side of the negative rotor body (6), and a negative rotor suction end oil seal (8) is arranged on the outer side of the negative rotor suction end gas seal (7) and located on the negative rotor body (6); a negative rotor exhaust end seal (9) is arranged on the rear circumferential side of the negative rotor body (6), and a negative rotor exhaust end oil seal (10) is arranged on the outer side of the negative rotor exhaust end seal (9) and located on the negative rotor body (6).

2. The mechanical seal structure for the exhaust end of an oil-free screw compressor according to claim 1, characterized in that: A sealant (13) is provided between the male rotor exhaust end seal (4) and the rotor seat (11).

3. The mechanical seal structure at the exhaust end of an oil-free screw compressor according to claim 1, characterized in that: The male rotor exhaust end seal (4) comprises a male exhaust end oil seal housing (31), a male exhaust end oil seal straight groove (32), a middle air vent (33) and a male exhaust end oil seal rear mounting groove (34); the middle air vent (33) is provided in the middle of the inner side of the male exhaust end oil seal housing (31); the rear side of the middle air vent (33) is located on the male exhaust end oil seal housing (31) and a male exhaust end oil seal rear mounting groove (34) is provided; the front side of the middle air vent (33) is located on the male exhaust end oil seal housing (31) and a male exhaust end oil seal straight groove (32) is provided; the male exhaust end oil seal housing (31) is connected to the male rotor body (1).

4. The mechanical seal structure for the exhaust end of an oil-free screw compressor according to claim 1, characterized in that: The female rotor exhaust end seal (9) comprises a female exhaust end air seal straight groove (71), an inner air vent (72), a female exhaust end air seal rear installation groove (73) and a female exhaust end air seal shell (74); the inner side of the female exhaust end air seal shell (74) is provided with an inner air vent (72); the rear side of the inner air vent (72) is located on the female exhaust end air seal shell (74) and is provided with a female exhaust end air seal rear installation groove (73); the front side of the inner air vent (72) is located on the female exhaust end air seal shell (74) and is provided with a female exhaust end air seal straight groove (71); the female exhaust end air seal shell (74) is connected to the female rotor body (6).

5. The mechanical seal structure for the exhaust end of an oil-free screw compressor according to claim 1, characterized in that: The male rotor suction end air seal (2) and the male rotor suction end oil seal (3) are installed and connected to the suction end of the male rotor body (1).

6. The mechanical seal structure for the exhaust end of an oil-free screw compressor according to claim 1, characterized in that: The air seal (7) at the suction end of the female rotor and the oil seal (8) at the suction end of the female rotor are installed and connected to the suction end of the female rotor body (6).

7. The mechanical seal structure for the exhaust end of an oil-free screw compressor according to claim 2, characterized in that: The male rotor exhaust end seal (4) is installed on the rotor seat (11) and the exhaust end of the male rotor body (1).

8. The mechanical seal structure for the exhaust end of an oil-free screw compressor according to claim 1, characterized in that: The female rotor exhaust end seal (9) is installed on the rotor seat (11) and the exhaust end of the female rotor body (6).

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