A high speed gearbox sealing structure

Abstract

The present invention discloses a high-speed gearbox sealing structure, which specifically relates to the field of gearbox transmission technology, including a housing, a rotating shaft passing through one side of the housing, an oil seal sleeve at the connection between the rotating shaft and the housing, a plurality of evenly distributed sealing bevel teeth inside the oil seal sleeve, an oil slinger ring sleeved outside the rotating shaft, and an oil retaining ring on one side of the oil slinger ring. The present invention blocks the oil through the oil retaining ring, the sealing bevel teeth and the first oil sealing passage, the second oil sealing passage and the third oil sealing passage form a sealing structure ring and a gap sealing ring, the sealing bevel teeth cooperate with the second air sealing passage and the first air sealing passage to form an airflow sealing ring and a gap sealing ring, different sealing methods are alternately arranged to block the oil flow, oil mist flow and airflow, and block the external airflow and dust from entering the housing, and after the overflowed lubricating oil is intercepted, it can return to the housing from the oil return passage, which can ensure the smooth return of oil, thus having a good sealing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of gearbox transmission, and more specifically, to a high-speed gearbox sealing structure. Background Art

[0002] Just as screw compressors replaced piston compressors, more efficient, reliable and advanced integral centrifugal compressors are replacing screw compressors.

[0003] The high-speed gearbox for integral compressors requires a large amount of lubricating oil for lubrication of the relatively moving parts in the box during operation, and the lubricating oil also needs to be circulated and cooled. It is necessary to ensure smooth circulation of the lubricating oil. The high-speed gearbox for integral compressors generally contains a single input shaft and multiple output shafts. When it is working normally, the operating speed is very high. The lubricating oil will overflow through the joint surface between the input and output shafts and the box body, often resulting in insufficient lubricating oil and poor lubrication effect. The overflowed high-temperature lubricating oil will also damage the production environment and the gearbox body, affecting the normal operation of the gearbox.

[0004] The existing sealing structure has poor sealing effect, so it is necessary to invent a high-speed gearbox sealing structure. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a high-speed gearbox sealing structure, which blocks the oil through an oil retaining ring, and the sealing bevel gear and the first oil sealing channel, the second oil sealing channel and the third oil sealing channel together form a sealing structure ring and a gap sealing ring, and the sealing bevel gear and the second air sealing channel and the first air sealing channel cooperate to form an airflow sealing ring and a gap sealing ring. Different sealing methods are arranged alternately to block the oil flow, oil mist flow and air flow, and block external air flow and dust from entering the interior of the box body. After the overflowed lubricating oil is intercepted, it can return to the interior of the box body from the oil return channel, which can ensure smooth oil return, thereby having a good sealing effect, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-speed gearbox sealing structure, comprising a casing, a rotating shaft passing through one side of the casing, an oil seal sleeve being provided at the connection between the rotating shaft and the casing, a plurality of sealing bevel teeth being provided inside the oil seal sleeve, an oil slingering ring being provided on the outer sleeve of the rotating shaft, and the oil slingering ring being located in an oil discharge cavity in the middle of the aforementioned sealing bevel teeth, an oil baffle ring being provided on one side of the oil slingering ring, and the oil baffle ring being located on the rear side of the oil seal sleeve, an oil sealing cone cavity being formed between the sealing bevel teeth and the oil baffle ring; a first oil sealing passage, a second oil sealing passage and a third oil sealing passage being provided in sequence from right to left at the front end of the oil sealing cone cavity, an oil discharge passage being provided at the bottom of the first oil sealing passage, the second oil sealing passage and the third oil sealing passage, an oil discharge cavity being provided on one side of the third oil sealing passage, an oil return passage being provided at the bottom of the oil discharge cavity, and a second air sealing passage and a first air sealing passage being provided in sequence at the other side of the oil discharge cavity.

[0007] In a preferred embodiment, the oil seal sleeve consists of an upper sleeve body and a lower sleeve body, the upper sleeve body is arranged directly above the lower sleeve body, and a protrusion is provided on one side of the upper sleeve body and the lower sleeve body, and a plurality of symmetrically distributed threaded holes are provided on the surface of the protrusion, and screws are provided in the threaded holes.

[0008] In a preferred embodiment, the upper sleeve body and the lower sleeve body are fixedly connected by screws, a groove is provided at the connection between the upper sleeve body and the lower sleeve body, a sealing packing is provided inside the groove, and a limiting convex ring is provided outside the oil seal sleeve.

[0009] In a preferred embodiment, the oil seal sleeve, the oil slinger ring and the oil deflector ring are all made of metal materials, and the sealing packing is made of rubber material.

[0010] In a preferred embodiment, the oil slinger ring and the oil deflector ring are both interference connected to the rotating shaft, and the oil slinger ring and the oil deflector ring are distributed in parallel.

[0011] In a preferred embodiment, the gap between the oil seal sleeve and the rotating shaft is set to 0.2 mm, and the gap between the oil slinger and the oil seal sleeve is set to 1.2 mm.

[0012] In a preferred embodiment, the oil deflector ring is configured to be crater-shaped, and the cross-sectional shape of the sealing bevel gear is configured to be trapezoidal.

[0013] In a preferred embodiment, the oil slinger is arranged inside the oil drain cavity, the oil return passage runs through the oil drain cavity, and the first oil sealing passage, the second oil sealing passage and the third oil sealing passage are all connected to the oil drain passage.

[0014] Technical effects and advantages of the present invention:

[0015] 1. The oil is blocked by the oil retaining ring, the sealing bevel gear and the first sealing oil passage, the second sealing oil passage and the third sealing oil passage together form a sealing structure ring and a gap sealing ring, the sealing bevel gear and the second sealing air passage and the first sealing air passage cooperate to form an airflow sealing ring and a gap sealing ring, and different sealing methods are arranged alternately to block the oil flow, oil mist flow and air flow, and block the external air flow and dust from entering the box body, and after the overflowed lubricating oil is intercepted, it can return to the box body from the oil return passage, which can ensure smooth oil return, thus having a good sealing effect;

[0016] 2. The upper sleeve and the lower sleeve are buckled and fixed to the outside of the rotating shaft with screws. The oil slinger and the oil retainer ring are integrally fitted onto the rotating shaft. The processing is simple, the assembly is convenient, and it is convenient for later maintenance. It can be easily taken out for repair or replacement without disassembling the shaft. The sealing sleeve and the rotating shaft are clearance-fitted to reduce wear. The oil sealing sleeve, the oil slinger and the oil retainer ring are all made of metal materials, with a long service life, which can reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a cross-sectional view of the oil seal sleeve of the present invention.

[0019] Figure 3 It is the left side view of the oil seal sleeve of the present invention.

[0020] Figure 4 It is a schematic structural diagram of the oil slinger of the present invention.

[0021] Figure 5 It is a schematic structural diagram of the oil retaining ring of the present invention.

[0022] Figure 6 For the present invention Figure 1 A-section structure enlarged view.

[0023] The accompanying drawings are marked as follows: 1 housing, 2 rotating shaft, 3 oil seal sleeve, 31 sealing bevel gear, 32 sealing oil cone cavity, 33 first sealing oil passage, 34 second sealing oil passage, 35 third sealing oil passage, 36 oil discharge passage, 37 oil discharge cavity, 38 oil return passage, 39 second sealing air passage, 40 first sealing air passage, 301 upper housing, 302 lower housing, 303 protrusion, 304 screw, 305 sealing packing, 306 limiting protrusion ring, 4 oil throwing ring, 5 oil retaining ring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The present invention provides Figure 1-6 A high-speed gearbox sealing structure shown in the figure comprises a housing 1, a rotating shaft 2 is passed through one side of the housing 1, an oil seal sleeve 3 is provided at the connection between the rotating shaft 2 and the housing 1, a plurality of evenly distributed sealing bevel teeth 31 are provided inside the oil seal sleeve 3, an oil slinger 4 is sleeved on the outer side of the rotating shaft 2, an oil retainer ring 5 is provided on one side of the oil slinger 4, the oil retainer ring 5 is arranged on one side of the oil seal sleeve 3, and an oil sealing cone cavity 32 is provided between the sealing bevel teeth 31 and the oil retainer ring 5;

[0026] A first oil sealing passage 33 is provided on one side of the oil sealing cone cavity 32, a second oil sealing passage 34 is provided on one side of the first oil sealing passage 33, a third oil sealing passage 35 is provided on one side of the second oil sealing passage 34, an oil discharge passage 36 is provided at the bottom of the first oil sealing passage 33, the second oil sealing passage 34 and the third oil sealing passage 35, an oil discharge cavity 37 is provided on one side of the third oil sealing passage 35, an oil return passage 38 is provided at the bottom of the oil discharge cavity 37, a second air sealing passage 39 is provided on one side of the oil discharge cavity 37, and a first air sealing passage 40 is provided on one side of the second air sealing passage 39;

[0027] The oil retaining ring 5 is configured to be in a crater shape, and the cross-sectional shape of the sealing bevel gear 31 is configured to be in a trapezoidal shape;

[0028] The oil slinger 4 is arranged inside the oil discharge cavity 37, the oil return passage 38 runs through the oil discharge cavity 37, and the first oil sealing passage 33, the second oil sealing passage 34 and the third oil sealing passage 35 are all connected to the oil discharge passage 36;

[0029] The specific implementation method is as follows: during the rotation of the shaft 2, the lubricating oil is transmitted through the gap on the outside of the shaft 2, and is first blocked by the oil retaining ring 5 to prevent the oil from being thrown out. The oil sealing cone cavity 32 seals the oil mist, and the sealing bevel gear 31 and the first oil sealing passage 33, the second oil sealing passage 34 and the third oil sealing passage 35 together form a sealing structure ring and a gap sealing ring. The overflowing oil flows down from the oil discharge passage 36 into the oil discharge cavity 37, and is discharged through the oil flinging ring, and the oil is thrown into the oil discharge cavity 37, and is returned through the oil return passage 38. The sealing bevel gear 31 cooperates with the second air sealing passage 39 and the first air sealing passage 4 to form an air flow sealing ring and a gap sealing ring. Different sealing methods are arranged alternately, which can well block the oil flow, oil mist flow and air flow, and prevent external air flow and dust from entering the interior of the housing 1. Moreover, after the overflowing lubricating oil is intercepted, it can return to the interior of the housing 1 from the oil return passage 38, which can ensure smooth oil return, thereby having a good sealing effect.

[0030] like Figure 1-6 A high-speed gearbox sealing structure shown in the figure, the oil seal sleeve 3 is composed of an upper sleeve body 301 and a lower sleeve body 302, the upper sleeve body 301 is arranged directly above the lower sleeve body 302, and a convex block 303 is provided on one side of the upper sleeve body 301 and the lower sleeve body 302, and a plurality of symmetrically distributed threaded holes are provided on the surface of the convex block 303, and screws 304 are provided in the threaded holes;

[0031] The upper casing 301 and the lower casing 302 are fixedly connected by screws 304. A groove is provided at the connection between the upper casing 301 and the lower casing 302. A sealing packing 305 is provided inside the groove. A limiting convex ring 306 is provided outside the oil seal sleeve 3.

[0032] The oil seal sleeve 3, the oil slinger ring 4 and the oil retainer ring 5 are all made of metal materials, and the sealing packing 305 is made of rubber material;

[0033] The oil slinger 4 and the oil baffler 5 are both interference connected with the rotating shaft 2, and the oil slinger 4 and the oil baffler 5 are arranged in parallel;

[0034] The gap between the oil seal sleeve 3 and the rotating shaft 2 is set to 0.2 mm, and the gap between the oil slinger 4 and the oil seal sleeve 3 is set to 1.2 mm;

[0035] The specific implementation method is as follows: the upper sleeve 301 and the lower sleeve 302 are buckled and fixed to the outside of the rotating shaft 2 with screws 304. The oil slinger 4 and the oil retainer ring 5 are integrally fitted onto the rotating shaft 2. The processing is simple, the assembly is convenient, and the later maintenance is convenient. The sealing sleeve 3 can be easily removed for repair or replacement without disassembling the shaft. The sealing sleeve 3 and the rotating shaft 2 are clearance-fitted to reduce wear. The oil sealing sleeve 3, the oil slinger 4 and the oil retainer ring 5 are all made of metal materials, have a long service life, and can reduce production costs.

[0036] Working principle of the present invention:

[0037] Refer to the instruction manual Figure 1 The lubricating oil is transmitted through the gap outside the rotating shaft 2, and is first blocked by the oil retaining ring 5. The oil sealing cone cavity 32 seals the oil mist. The sealing cone gear 31, the first oil sealing passage 33, the second oil sealing passage 34 and the third oil sealing passage 35 together form a sealing structure ring and a gap sealing ring. The overflowing oil flows down from the oil discharge passage 36 into the oil discharge cavity 37, and is discharged through the oil slinger ring. The oil is thrown into the oil discharge cavity 37 and returned through the oil return passage 38. The sealing cone gear 31 cooperates with the second air sealing passage 39 and the first air sealing passage 4 to form an airflow sealing ring and a gap sealing ring. After the overflowing lubricating oil is intercepted, it can return to the inside of the box body 1 from the oil return passage 38;

[0038] Refer to the instruction manual Figure 1 The upper sleeve 301 and the lower sleeve 302 are buckled and fixed to the outside of the rotating shaft 2 with screws 304. The oil slinger 4 and the oil retainer ring 5 are integrally fitted onto the rotating shaft 2, and are convenient for removal, maintenance or replacement without disassembling the shaft. The sealing sleeve 3 and the rotating shaft 2 are clearance-fitted and the structure is not in contact. The oil sealing sleeve 3, the oil slinger 4 and the oil retainer ring 5 are all made of metal materials and have a long service life.

[0039] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0040] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0041] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-speed gearbox sealing structure, comprising a housing (1), characterized in that: A rotating shaft (2) passes through one side of the housing (1); an oil seal sleeve (3) is provided at the connection between the rotating shaft (2) and the housing (1); a plurality of sealing bevel teeth (31) are provided inside the oil seal sleeve (3); an oil slinger (4) is provided on the outer side of the rotating shaft (2); the oil slinger (4) is located in an oil discharge cavity (37) in the middle of the sealing bevel teeth (31); an oil retainer ring (5) is provided on one side of the oil slinger ring (4); the oil retainer ring (5) is located at the rear side of the oil seal sleeve (3); an oil sealing conical cavity is formed between the sealing bevel teeth (31) and the oil retainer ring (5). (32); the front end of the oil sealing cone cavity (32) is provided with a first oil sealing passage (33), a second oil sealing passage (34) and a third oil sealing passage (35) in sequence from right to left; the bottoms of the first oil sealing passage (33), the second oil sealing passage (34) and the third oil sealing passage (35) are provided with an oil discharge passage (36); one side of the third oil sealing passage (35) is provided with an oil discharge cavity (37); the bottom of the oil discharge cavity (37) is provided with an oil return passage (38); the other side of the oil discharge cavity (37) is provided with a second air sealing passage (39) and a first air sealing passage (40) in sequence; The oil seal sleeve (3) is composed of an upper sleeve body (301) and a lower sleeve body (302); the upper sleeve body (301) is arranged directly above the lower sleeve body (302); a convex block (303) is provided on one side of the upper sleeve body (301) and the lower sleeve body (302); a surface of the convex block (303) is provided with a plurality of symmetrically distributed threaded holes, and screws (304) are provided in the threaded holes; The oil slinger ring (4) and the oil baffle ring (5) are both interference-connected with the rotating shaft (2), and the oil slinger ring (4) and the oil baffle ring (5) are distributed in parallel.

2. A high-speed gearbox sealing structure according to claim 1, characterized in that: The upper sleeve (301) and the lower sleeve (302) are fixedly connected by screws (304); a groove is provided at the connection between the upper sleeve (301) and the lower sleeve (302); a sealing packing (305) is provided inside the groove; and a limiting convex ring (306) is provided on the outside of the oil seal sleeve (3).

3. A high-speed gearbox sealing structure according to claim 2, characterized in that: The oil seal sleeve (3), the oil slinger ring (4) and the oil retainer ring (5) are all made of metal materials, and the sealing packing (305) is made of rubber material.

4. A high-speed gearbox sealing structure according to claim 1, characterized in that: The gap between the oil seal sleeve (3) and the rotating shaft (2) is set to 0.2 mm, and the gap between the oil slinger (4) and the oil seal sleeve (3) is set to 1.2 mm.

5. A high-speed gearbox sealing structure according to claim 1, characterized in that: The oil deflector ring (5) is configured to be in a crater shape, and the cross-sectional shape of the sealing cone tooth (31) is configured to be trapezoidal.

6. A high-speed gearbox sealing structure according to claim 1, characterized in that: The oil slinger (4) is arranged inside the oil discharge cavity (37), the oil return passage (38) penetrates the oil discharge cavity (37), and the first oil sealing passage (33), the second oil sealing passage (34) and the third oil sealing passage (35) are all in communication with the oil discharge passage (36).

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