Sealing device for speed reducer of oil pumping unit

Abstract

The utility model discloses a sealing device for a speed reducer of a pumping unit in the technical field of sealing devices, which comprises a speed reducer body and a sealing mechanism, a transmission shaft is rotatably connected onto the speed reducer body, the sealing mechanism is sleeved on the transmission shaft, and the sealing mechanism is connected onto the speed reducer body. The oil pumping unit has the advantages that when the oil pumping unit leaks oil, the sealing cover can be detached firstly, then the second sealing ring, the sealing pipe and the third sealing ring are overhauled, then corresponding replacement is conducted, if oil still leaks, the shell can be detached again, and the abraded first sealing ring can be overhauled and replaced; the problem that a large number of parts need to be disassembled during overhauling can be effectively solved through the graded overhauling mode, the sealing pipe slides between the shell and the transmission shaft in a matched mode under the action of the springs, and then oil on the transmission shaft is squeezed back to the speed reducer body under the sealing action of the first sealing ring and the third sealing ring.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing devices, in particular to a sealing device for a pumping unit reducer. Background Art

[0002] At present, the most widely used equipment in the field of oil exploitation is the pumping unit. The lubricating oil required by the reducer in the pumping unit always leaks from the output shaft end, seriously polluting the environment. When the leakage is large, it will cause the reducer to lack oil, accelerate the wear of gears, and affect the service life.

[0003] In the prior art, when replacing the seal or installing the sealing device, it is necessary to disassemble all the connecting rods, cranks and several tons of counterweights of the pumping unit before replacement, which is time-consuming and laborious and seriously affects production. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is that when repairing the oil leakage problem of the pumping unit, it is necessary to disassemble multiple components, which is relatively complicated.

[0005] To achieve the above object, the technical solution provided by the utility model is as follows:

[0006] A sealing device for a pumping unit reducer includes a reducer body, a transmission shaft rotatably connected to the reducer body, and a sealing mechanism. The sealing mechanism is sleeved on the transmission shaft and connected to the reducer body. The sealing mechanism includes a housing and a sealing cover. Both the housing and the sealing cover are sleeved on the transmission shaft. One end of the housing is fixedly connected with a first connecting ring, and a plurality of first bolts are inserted through the first connecting ring. The first bolts are threadedly connected to the reducer body. The housing is fixedly connected with a second connecting ring, one end of the sealing cover is fixedly connected with a third connecting ring, and a plurality of second bolts are inserted through the third connecting ring. The second bolts are threadedly connected to the second connecting ring.

[0007] Further, a first sealing groove is provided on one side of the first connecting ring, and a first sealing ring is provided in the first sealing groove. The first connecting ring and the reducer body clamp and fix the first sealing ring in the first sealing groove. A plurality of first sealing convex rings are provided on the first sealing ring, and the first sealing convex rings are pressed against the reducer body.

[0008] Further, a second sealing ring is fixedly connected inside the sealing cover, and the upper end of the housing and the inner wall of the sealing cover clamp the second sealing ring.

[0009] Further, a connecting pipe is fixedly connected inside the sealing cover. The connecting pipe is adapted to the transmission shaft. A second sealing groove is provided on the inner wall of the connecting pipe, and a third sealing ring is fixedly connected in the second sealing groove. The transmission shaft and the connecting pipe clamp the third sealing ring. A plurality of second sealing convex rings are provided on the inner wall of the third sealing ring, and the second sealing convex rings abut against the transmission shaft.

[0010] Further, a plurality of springs are fixedly connected to the lower end of the connecting pipe, and the lower ends of the plurality of springs are fixedly connected to a sealing pipe, and the sealing pipe is slidably fitted on the transmission shaft.

[0011] Further, the first sealing ring, the second sealing ring and the third sealing ring are all made of rubber.

[0012] Further, the first sealing ring and the first sealing convex ring are integrally formed, and the third sealing ring and the second sealing convex ring are integrally formed.

[0013] The beneficial effects obtained by the present utility model with the above structure are as follows:

[0014] 1: The sealing of the transmission shaft is realized through a variety of sealing combinations of the first sealing ring, the second sealing ring, the third sealing ring and the sealing pipe, effectively improving the sealing effect of the transmission shaft;

[0015] 2: When the pumping unit leaks oil, the sealing cover can be first disassembled to inspect the second sealing ring, the sealing pipe and the third sealing ring and then replace them correspondingly. If it still leaks oil, the housing can be disassembled again to inspect and replace the wear of the first sealing ring. The hierarchical inspection method can effectively avoid the problem of a large number of parts being disassembled during inspection;

[0016] 3: The sealing pipe slides and fits between the housing and the transmission shaft under the action of a plurality of springs. Then, under the sealing action of the first sealing ring and the third sealing ring, the oil on the transmission shaft is squeezed back into the reducer body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the whole machine of the present utility model.

[0018] Figure 2 is an exploded view of the present utility model.

[0019] Figure 3 is a cross-sectional view of the present utility model.

[0020] Figure 4 is a schematic diagram of the first sealing ring of the present utility model.

[0021] Figure 5 is a schematic diagram of the third sealing ring of the present utility model.

[0022] Description of the reference numerals:

[0023] 1. Reducer body, 2. Transmission shaft, 3. Sealing mechanism, 301. Housing, 302. First connecting ring, 303. First bolt, 304. First sealing groove, 305. First sealing ring, 306. First sealing convex ring, 307. Second connecting ring, 308. Second bolt, 309. Sealing cover, 310. Third connecting ring, 311. Second sealing ring, 312. Second sealing groove, 313. Third sealing ring, 314. Second sealing convex ring, 315. Spring, 316. Sealing pipe, 317. Connecting pipe. Detailed implementation mode

[0024] As Figures 1-5 shown, a sealing device for a pumping unit reducer includes a reducer body 1, a transmission shaft 2 is rotatably connected to the reducer body 1, and further includes a sealing mechanism 3. The sealing mechanism 3 is sleeved on the transmission shaft 2, and the sealing mechanism 3 is connected to the reducer body 1. The sealing mechanism 3 includes a housing 301 and a sealing cover 309. Both the housing 301 and the sealing cover 309 are sleeved on the through shaft. One end of the housing 301 is fixedly connected with a first connecting ring 302, and a number of first bolts 303 are inserted through the first connecting ring 302. The first bolts 303 are threadedly connected to the reducer body 1. A second connecting ring 307 is fixedly connected to the housing 301, and a third connecting ring 310 is fixedly connected to one end of the sealing cover 309. A number of second bolts 308 are inserted through the third connecting ring 310. The second bolts 308 are threadedly connected to the second connecting ring 307.

[0025] As Figure 3 shown, in order to achieve the sealing at the connection between the first connecting ring 302 and the reducer body 1, a first sealing groove 304 is provided on one side of the first connecting ring 302, a first sealing ring 305 is arranged in the first sealing groove 304, the first connecting ring 302 and the reducer body 1 clamp and fix the first sealing ring 305 in the first sealing groove 304, and a number of first sealing convex rings 306 are arranged on the first sealing ring 305. The first sealing convex rings 306 are pressed against the reducer body 1.

[0026] As Figure 3 shown, in order to achieve the sealing between the sealing cover 309 and the housing 301, a second sealing ring 311 is fixedly connected inside the sealing cover 309, and the upper end of the housing 301 and the inner wall of the sealing cover 309 clamp the second sealing ring 311.

[0027] As Figure 3As shown in the figure, in order to achieve the seal between the sealing cover 309 and the transmission shaft 2, a connecting pipe 317 is fixedly connected inside the sealing cover 309. The connecting pipe 317 is adapted to the transmission shaft 2. A second sealing groove 312 is provided on the inner wall of the connecting pipe 317. A third sealing ring 313 is fixedly connected in the second sealing groove 312. The transmission shaft 2 and the connecting pipe 317 clamp the third sealing ring 313. A number of second sealing ridges 314 are provided on the inner wall of the third sealing ring 313. The second sealing ridges 314 abut against the transmission shaft 2.

[0028] As Figure 3 As shown in the figure, in order to push and squeeze the oil on the transmission shaft 2 back to the reducer body 1 under the sealing action of the first sealing ring 305, the second sealing ring 311 and the third sealing ring 313, a number of springs 315 are fixedly connected to the lower end of the connecting pipe 317. The lower ends of the a number of springs 315 are fixedly connected to a sealing pipe 316. The sealing pipe 316 is slidably adapted to the transmission shaft 2.

[0029] The first sealing ring 305, the second sealing ring 311 and the third sealing ring 313 are all made of rubber material. The first sealing ring 305 and the first sealing ridge 306 are integrally formed. The third sealing ring 313 and the second sealing ridge 314 are integrally formed.

[0030] When the present utility model is in use, the first connecting ring 302 is connected to the reducer body 1 by the first bolt 303, and then the first sealing ring 305 is clamped to achieve sealing. The second connecting ring 307 and the third connecting ring 310 are connected by the second bolt 308, so that the second connecting ring 307 and the sealing cover 309 squeeze the second sealing ring 311 to achieve sealing. At the same time, the third sealing ring 313 on the connecting pipe 317 fixedly connected inside the sealing cover 309 is squeezed and fitted to the transmission shaft 2 through the second sealing ridges 314 to achieve sealing. Thus, the seal between the transmission shaft 2 and the reducer body 1 is realized. At the same time, when oil is dispersed along the transmission shaft 2, under the sealing effect of the sealing mechanism 3, the sealing pipe 316 slides and squeezes the oil on the transmission shaft 2 between the housing 301 and the transmission shaft 2, and squeezes the oil back to the reducer body 1.

[0031] In summary: In the embodiment of the present utility model, the sealing of the transmission shaft 2 is achieved through multiple sealing combinations of the first sealing ring 305, the second sealing ring 311, the third sealing ring 313 and the sealing pipe 316, effectively improving the sealing effect of the transmission shaft 2. When the pumping unit leaks oil, the sealing cover 309 can be first disassembled to inspect the second sealing ring 311, the sealing pipe 316 and the third sealing ring 313 and then replace them correspondingly. If it still leaks oil, the housing 301 can be disassembled again to inspect and replace the wear of the first sealing ring 305. The hierarchical inspection method can effectively avoid the problem of disassembling a large number of parts during inspection. The sealing pipe 316 slides adaptively between the housing 301 and the transmission shaft 2 under the action of several springs 315. Then, under the sealing action of the first sealing ring 305 and the third sealing ring 313, the oil on the transmission shaft 2 is squeezed back into the reducer body 1.

[0032] The above describes the present utility model and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative work without departing from the creative purpose of the present utility model, they shall fall within the protection scope of the present utility model.

Claims

1. A sealing device for a pumping unit reducer, comprising a reducer body, wherein a transmission shaft is rotatably connected to the reducer body, and is characterized in that: It further includes a sealing mechanism. The sealing mechanism is sleeved on the transmission shaft, and the sealing mechanism is connected to the reducer body. The sealing mechanism includes a housing and a sealing cover. Both the housing and the sealing cover are sleeved on the transmission shaft. One end of the housing is fixedly connected with a first connecting ring, and a plurality of first bolts are inserted through the first connecting ring. The first bolts are threadedly connected to the reducer body. A second connecting ring is fixedly connected to the housing. One end of the sealing cover is fixedly connected with a third connecting ring, and a plurality of second bolts are inserted through the third connecting ring. The second bolts are threadedly connected to the second connecting ring.

2. The sealing device for a pumping unit reducer according to claim 1, characterized in that: A first sealing groove is provided on one side of the first connecting ring. A first sealing ring is provided in the first sealing groove. The first connecting ring and the reducer body clamp and fix the first sealing ring in the first sealing groove. A plurality of first sealing convex rings are provided on the first sealing ring. The first sealing convex rings are pressed against the reducer body.

3. The sealing device for a pumping unit reducer according to claim 2, characterized in that: A second sealing ring is fixedly connected inside the sealing cover. The upper end of the housing and the inner wall of the sealing cover clamp the second sealing ring.

4. A sealing device for a pumping unit reducer according to claim 3, characterized in that: A connecting pipe is fixedly connected inside the sealing cover. The connecting pipe is adapted to the transmission shaft. A second sealing groove is provided on the inner wall of the connecting pipe. A third sealing ring is fixedly connected in the second sealing groove. The transmission shaft and the connecting pipe clamp the third sealing ring. A plurality of second sealing convex rings are provided on the inner wall of the third sealing ring. The second sealing convex rings are abutted against the transmission shaft.

5. The sealing device for a pumping unit reducer according to claim 4, characterized in that: A plurality of springs are fixedly connected to the lower end of the connecting pipe. The lower ends of the plurality of springs are fixedly connected with a sealing pipe. The sealing pipe is slidably adapted to the transmission shaft.

6. A sealing device for a pumping unit reducer according to claim 4, characterized in that: The first sealing ring, the second sealing ring and the third sealing ring are all made of rubber material.

7. A sealing device for a pumping unit reducer according to claim 6, characterized in that: The first sealing ring and the first sealing convex ring are integrally formed. The third sealing ring and the second sealing convex ring are integrally formed.

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