A transmission mechanism in a vertical centrifuge

Abstract

The present invention discloses a transmission mechanism for a vertical centrifuge, comprising: a main shaft and a cylindrical bearing seat, wherein a support cylinder is provided in the cylindrical bearing seat, and the main shaft is disposed in the support cylinder via upper and lower bearings. The main shaft is sequentially sleeved with a shaft sleeve and a liquid guide sleeve on the outer side of the upper bearing, and an upper bearing inner gland is sleeved on the shaft sleeve. The upper bearing inner gland comprises: an annular gland body, wherein the inner and outer sides of the annular gland body are respectively provided with a liquid retaining ring and a liquid blocking cylinder upwardly, forming a liquid collecting cavity; an upper bearing cap is sleeved on the liquid guiding sleeve, a liquid guiding sleeve seal is provided between the liquid guiding sleeve and the upper bearing cap, and the upper bearing cap seals against the upper bearing inner gland and is fixed to the cylindrical bearing seat; a drainage hole is provided in the liquid blocking cylinder near the bottom wall of the liquid collecting cavity, a transverse drainage pipeline is provided through the support cylinder and communicates with the drainage hole, and a longitudinal drainage pipeline is provided in the cylindrical bearing seat, which is connected to the transverse drainage pipeline. The above-mentioned transmission mechanism greatly broadens the application of the centrifuge.

Description

Technical Field

[0001] The present invention relates to a vertical centrifuge, in particular to a transmission mechanism in a vertical centrifuge. Background Art

[0002] With the rapid development of the economy, the application of centrifuges has been continuously expanded, and higher requirements have been placed on the working conditions of centrifuges. At present, when traditional vertical centrifuges are in operation, when there is too much liquid, it will leak into the bearing cavity through the seal between the shaft sleeve and the upper bearing cover on the main shaft. If the bearings continue to operate under this working condition, they will cause premature damage, which will greatly shorten the service life of the bearings and increase production costs. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a transmission mechanism in a vertical centrifuge which can prevent liquid from flowing into a bearing cavity.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a transmission mechanism in a vertical centrifuge, which structure includes: a machine base, and a main shaft movably arranged in the machine base, the specific installation structure of the main shaft includes: a cylindrical bearing seat arranged on the machine base, a support cylinder is passed through the cylindrical bearing seat, and the specific arrangement method is: the cylindrical bearing seat is provided with a stepped mounting hole with a large upper section and a small lower section, an annular step is formed between the upper and lower sections of the stepped mounting hole, the support cylinder is provided with an annular mounting boss matching the upper section of the stepped mounting hole near its upper end, and the support cylinder is passed through the stepped mounting hole. The annular mounting boss of the support cylinder is placed on the annular step in the stepped mounting hole; the main shaft is movably arranged in the support cylinder through the upper and lower bearings, and the main shaft is sequentially sleeved with a shaft sleeve and a liquid guide sleeve on the outer side of the upper bearing, and the sealing sleeve on the shaft sleeve is provided with an upper bearing inner pressure cover, and the specific structure of the upper bearing inner pressure cover includes: an annular pressure cover body, the inner side of the annular pressure cover body protrudes upward to form a liquid retaining ring, the outer side of the annular pressure cover body protrudes upward to form a liquid blocking cylinder that cooperates with the support cylinder, so that the annular pressure cover body, the liquid retaining ring and the liquid blocking cylinder form a liquid collecting cavity, and the bottom wall of the liquid collecting cavity is inclined downward from the inside to the outside, The liquid blocking cylinder is sealed against the support cylinder, the upper end of the liquid blocking cylinder protrudes outward to form an annular mounting edge that matches the support cylinder, and the annular mounting edge is fixed to the support cylinder. The annular pressure cover body is provided with an annular notch on its bottom surface that is open to the side of the main shaft, and the shaft sleeve is provided with an annular oil groove on the side facing the main shaft. The shaft sleeve is also provided with an oil connection channel connecting the annular notch and the annular oil groove. The main shaft is provided with an upwardly opening longitudinal oiling channel and a first transverse oiling channel connecting the longitudinal oiling channel and the annular notch; the liquid guide sleeve is provided with an upper bearing cover A liquid guide sleeve seal is provided between the liquid guide sleeve and the upper bearing cover, the upper bearing cover seal is against the upper bearing inner pressure cover and is fixed on the cylindrical bearing seat; the liquid blocking cylinder is provided with a drainage hole at the bottom wall near the liquid collecting chamber, and the support cylinder is provided with a horizontal drainage pipeline communicating with the drainage hole on the upper side of the annular boss; a longitudinal drainage pipeline extending downward is provided in the cylindrical bearing seat, and the longitudinal drainage pipeline passes through the annular boss on the support cylinder upward and is connected to the horizontal drainage pipeline; the main shaft is provided with a lower bearing cover on the sealing sleeve at the lower end of the support cylinder, and the lower bearing cover is fixed on the support cylinder.

[0005] As a preferred embodiment, in the transmission mechanism of a vertical centrifuge, the cylindrical bearing seat is further provided with a longitudinal air injection pipeline extending downward, and the longitudinal air injection pipeline passes upward from the annular mounting boss on the support cylinder, and the upper bearing cover is provided with an inner-cover air path for connecting the longitudinal air injection pipeline and the liquid collecting chamber.

[0006] As a preferred solution, in the transmission mechanism of the vertical centrifuge, the lower end of the liquid guide sleeve is provided with an outwardly protruding annular flow guide boss.

[0007] As a preferred solution, in the transmission mechanism of the vertical centrifuge, the annular guide boss is provided with a guide surface that slopes downward from the inside to the outside.

[0008] As a preferred solution, in the transmission mechanism of the vertical centrifuge, the outer end of the longitudinal liquid discharge pipeline is connected to an external pipe, a drain valve is provided on the external pipe, and an observation bottle with a transparent window is provided in the pipeline of the external pipe.

[0009] As a preferred embodiment, in the transmission mechanism of the vertical centrifuge, the specific installation method between the upper bearing cover and the upper bearing inner pressure cover is as follows: an annular groove is provided on the bottom surface of the upper bearing cover, which cooperates with the upper end of the upper bearing inner pressure cover, and the upper end of the upper bearing inner pressure cover is clamped in the annular groove, and a sealing ring is provided between the bottom wall of the annular groove and the upper end surface of the upper bearing inner pressure cover.

[0010] As a preferred solution, in the transmission mechanism of the vertical centrifuge, the main shaft is provided with a bearing bushing between the upper and lower bearings.

[0011] As a preferred solution, in the transmission mechanism of the vertical centrifuge, a second transverse oiling channel communicating with the longitudinal oiling channel is further provided on the main shaft below the first transverse oiling channel.

[0012] As a preferred solution, in the transmission mechanism of the vertical centrifuge, the longitudinal liquid discharge pipeline and the longitudinal gas injection pipeline are arranged on both sides of the main shaft.

[0013] As a preferred solution, in the transmission mechanism of the vertical centrifuge, the main shaft is movably arranged on the lower bearing cover through a bearing.

[0014] The beneficial effects of the present invention are as follows: the present invention provides a liquid guide sleeve, a liquid collecting cavity, and corresponding longitudinal and transverse liquid drainage pipelines, so that the liquid leaked from the liquid guide sleeve flows into the liquid collecting cavity and is discharged outwardly by the longitudinal and transverse liquid drainage pipelines; in addition, since an oil filling channel is provided on the main shaft, an annular notch is provided on the bottom surface of the annular gland body, an annular oil groove is provided on the shaft sleeve, and an oil connection channel connecting the annular notch and the annular oil groove is provided on the shaft sleeve, the upper and lower bearings can be oiled, making the upper and lower bearings more lubricated, thereby greatly extending the service life of the upper and lower bearings and reducing production costs. Furthermore, by providing an outwardly protruding annular guide boss at the lower end of the liquid guide sleeve and configuring the upper end surface of the annular guide boss to be inclined downward from the inside to the outside, the flow rate and direction of the liquid are reduced, ensuring that the liquid does not splash outside the liquid collecting chamber, and effectively ensuring that the liquid does not flow into the cavities of the upper and lower bearings; in addition, due to the provision of an external pipe, an observation bottle and a liquid discharge valve, the discharge of the liquid is more intuitive and controllable; and due to the provision of an air injection pipeline, in the case of flammable liquids, protective gases such as nitrogen can be injected into the liquid collecting chamber, thereby making the centrifuge have an explosion-proof function, which further broadens its application field. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic cross-sectional structural diagram of the transmission mechanism in the vertical centrifuge of the present invention.

[0016] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of part A.

[0017] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure of part B.

[0018] Figure 4 yes Figure 2 Schematic diagram of the enlarged structure of part C.

[0019] Figures 1 to 4The reference numerals in the figures are: 1. base, 11. cylindrical bearing seat, 2. main shaft, 201. longitudinal oiling channel, 202. first transverse oiling channel, 204. second transverse oiling channel, 21. main shaft pressure cover, 22. lower bearing cover, 221. bearing, 23. upper bearing cover, 231. gas path in the cover, 234. liquid collecting chamber, 2340. bottom wall, 24. pressure cover in the upper bearing, 240. annular pressure cover body, 241. liquid blocking ring, 242. liquid blocking cylinder, 243. annular mounting edge, 244. annular notch, 25. supporting cylinder , 251, annular mounting boss, 26, bearing bushing, 271, upper bearing, 272, lower bearing, 28, sleeve, 281, sleeve seal, 283, annular oil groove, 284, oil connection channel, 29, liquid guide sleeve seal, 31, air inlet pipe, 32, adapter, 33, longitudinal air injection pipeline, 4, liquid guide sleeve, 41, annular guide boss, 411, guide surface, 51, transverse drainage pipeline, 52, longitudinal drainage pipeline, 61, external pipe, 62, observation bottle, 63, drain valve, 7, drum bottom, 8, drive wheel. DETAILED DESCRIPTION

[0020] The following is combined with Figures 1 to 4 , describe in detail the specific implementation scheme of the transmission mechanism in the vertical centrifuge described in the present invention.

[0021] like Figure 1 As shown, the transmission mechanism of a vertical centrifuge according to the present invention comprises: a base 1, and a main shaft 2 movably arranged in the base 1. The specific installation structure of the main shaft 2 comprises: a cylindrical bearing seat 11 arranged on the base 1, and a support cylinder 25 is passed through the cylindrical bearing seat 11. Figure 2 As shown, the specific arrangement of the support cylinder 25 is as follows: a stepped mounting hole with a large upper section and a small lower section is provided in the cylindrical bearing seat 11, and an annular step is formed between the upper and lower sections of the stepped mounting hole. The support cylinder 25 is provided with an annular mounting boss 251 that matches the upper section of the stepped mounting hole near its upper end. The support cylinder 25 is inserted into the stepped mounting hole of the cylindrical bearing seat 11, and the annular mounting boss 251 of the support cylinder 25 is placed on the annular step in the stepped mounting hole of the cylindrical bearing seat 11; the main shaft 2 is movably arranged in the support cylinder 25 through the upper bearing 271 and the lower bearing 272, and the main shaft 2 is provided with a bearing bushing 26 between the upper bearing 271 and the lower bearing 272; the main shaft 2 is on the outside of the upper bearing 271 ( Figure 1 and Figure 2 The upper side of the shaft sleeve 28 and the liquid guide sleeve 4 are sequentially sleeved. Figure 3As shown, the lower end of the guide sleeve 4 is provided with an outwardly protruding annular guide boss 41, and the annular guide boss 41 is provided with a guide surface 411 that slopes downward from the inside to the outside; the shaft sleeve 28 is sleeved with an upper bearing inner pressure cover 24, and a shaft sleeve seal 281 is provided between the bearing 28 and the upper bearing inner pressure cover 24 (this belongs to the conventional technology in this field and will not be described in detail here); Figure 2 、 Figure 3 and Figure 4As shown, the specific structure of the upper bearing inner pressure cover 24 includes: an annular pressure cover body 240, the inner side of the annular pressure cover body 240 protrudes upward to form a liquid blocking ring 241, the outer side of the annular pressure cover body 240 protrudes upward to form a liquid blocking cylinder 242 that cooperates with the support cylinder 25, so that the annular pressure cover body 240, the liquid blocking ring 241 and the liquid blocking cylinder 242 form a liquid collecting cavity 234, the bottom wall 2340 of the liquid collecting cavity 234 is a conical surface that is inclined downward from the inside outward, the liquid blocking cylinder 242 is sealed against the support cylinder 25 through a sealing ring (belonging to the conventional technology in this field and will not be described in detail here), the upper end of the liquid blocking cylinder 242 protrudes outward to form an annular mounting edge 243 that cooperates with the support cylinder 25, and the annular mounting edge 243 is formed. 43 is fixed on the support cylinder 25 (which belongs to the conventional technology in this field and will not be described in detail here). The annular gland body 240 is provided with an annular notch 244 on its bottom surface, which is open to the side of the main shaft 2. The shaft sleeve 28 is provided with an annular oil groove 283 on the side facing the main shaft 2. The shaft sleeve 28 is provided with an oil connection channel 284 connecting the annular notch 244 and the annular oil groove 283 (which belongs to the conventional technology in this field and will not be described in detail here). The main shaft 2 is provided with an upwardly opening longitudinal oiling channel 201 and a first transverse oiling channel 202 connecting the longitudinal oiling channel 201 and the annular notch 244. The main shaft 2 is also provided with a A second transverse refueling channel 204 is provided which is communicated with the longitudinal refueling channel 201; an upper bearing cover 23 is sleeved on the liquid guide sleeve 4, a liquid guide sleeve seal 29 is provided between the liquid guide sleeve 4 and the upper bearing cover 23, the upper bearing cover 23 is sealed against the upper bearing inner pressure cover 24 and fixed on the cylindrical bearing seat 11, and the specific installation method between the upper bearing cover 23 and the upper bearing inner pressure cover 24 is as follows: an annular groove which cooperates with the upper end of the upper bearing inner pressure cover 24 is provided on the bottom surface of the upper bearing cover 23, the upper end of the liquid blocking cylinder 242 of the upper bearing inner pressure cover 24 is clamped in the annular groove of the upper bearing cover 23, and a bottom wall of the annular groove of the upper bearing cover 23 and the upper end surface of the liquid blocking cylinder 242 are provided between A sealing ring is provided (which is a common technique in this field and will not be described in detail here); the liquid blocking cylinder 242 is provided with a drainage hole at the bottom wall 2340 near the liquid collecting chamber 234; the support cylinder 25 is provided with a transverse drainage pipe 51 on the upper side of the annular mounting boss 251, which is connected to the drainage hole on the liquid blocking cylinder 242; the cylindrical bearing seat 11 is provided with a downwardly extending longitudinal drainage pipe 52 on one side thereof, which passes upward through the annular mounting boss 251 on the support cylinder 25 and is connected to the transverse drainage pipe 51; the outer end of the longitudinal drainage pipe 52 is connected to an external pipe 61, which is provided with a drain valve 63, and an observation bottle 62 with a transparent window is provided in the pipe of the external pipe 61;In this embodiment, the cylindrical bearing seat 11 is further provided with a downwardly extending longitudinal air injection line 33 on its other side. The longitudinal air injection line 33 extends upward through an annular mounting boss 251 on the support cylinder 25. The upper bearing cap 23 is provided with an in-cap air passage 231 for connecting the longitudinal air injection line 33 with the liquid collecting chamber 234 (this is conventional in the art and will not be described in detail here). The outer end of the longitudinal air injection line 33 is connected to the air inlet pipe 31 via an adapter 32. The main shaft 2 is fitted with a lower bearing cap 22 at the lower end of the support cylinder 25 via a bearing 221. A seal is provided between the main shaft 2 and the lower bearing cap 22 (this is conventional in the art and will not be described in detail here). The lower bearing cap 22 is fixed to the support cylinder 25 (this is conventional in the art and will not be described in detail here).

[0022] In actual application, the upper end of the main shaft 2 is connected to the drum bottom 7 of the drum. After the main shaft 2 extends out of the drum bottom 7, a main shaft pressure cover 21 is provided, and the main shaft pressure cover 21 is fixed on the drum bottom 7; the lower end of the main shaft 2 is provided with a transmission wheel 8.

[0023] The working principle of the present invention is as follows: when liquid leaks through the liquid guide sleeve seal 29, it enters the liquid collection chamber 234 through the liquid guide sleeve 4 and collects on the inclined surface of the upper bearing inner pressure cover 24, namely the bottom wall 2340 of the liquid collection chamber 234. The liquid is then discharged outwardly through the transverse drainage pipe 51 and the longitudinal drainage pipe 52 into the external pipe 61. During this discharge process, it is necessary to check the liquid level in the observation bottle 62. When the liquid in the observation bottle 62 is full, it is discharged through the drain valve 63. This prevents the liquid from entering the cavity of the upper bearing 271 and damaging the bearing. At the same time, the operating status of the liquid guide sleeve seal 29 can also be monitored by the amount of liquid collected in the observation bottle 62. In addition, in the case of flammable liquids, nitrogen can be injected into the liquid collection chamber 234 through the air inlet pipe 31, the longitudinal air injection pipe 33, and the internal air passage 231 in the upper bearing cover 23 to prevent sparks and explosions during rotation.

[0024] In summary, the above is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. All equivalent changes and modifications made in accordance with the shape, structure, characteristics and spirit described in the scope of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A transmission mechanism in a vertical centrifuge, comprising: A machine base and a main shaft movably arranged in the machine base, characterized in that the specific mounting structure of the main shaft includes: a cylindrical bearing seat arranged on the machine base, a supporting cylinder is passed through the cylindrical bearing seat, and the specific setting method is: a stepped mounting hole with a larger upper section and a smaller lower section is provided in the cylindrical bearing seat, an annular step is formed between the upper and lower sections of the stepped mounting hole, the supporting cylinder is provided with an annular mounting boss matching the upper section of the stepped mounting hole near its upper end, the supporting cylinder is passed through the stepped mounting hole, and the annular mounting boss of the supporting cylinder is placed on the stepped mounting hole The annular step; the main shaft is movably arranged in the supporting cylinder through the upper and lower bearings, and the main shaft is sequentially sleeved with a shaft sleeve and a liquid guide sleeve on the outer side of the upper bearing, and the sealing sleeve on the shaft sleeve is provided with an upper bearing inner pressure cover, and the specific structure of the upper bearing inner pressure cover includes: an annular pressure cover body, the inner side of the annular pressure cover body is raised upward to form a liquid blocking ring, the outer side of the annular pressure cover body is raised upward to form a liquid blocking cylinder matched with the supporting cylinder, so that the annular pressure cover body, the liquid blocking ring and the liquid blocking cylinder form a liquid collecting cavity, the bottom wall of the liquid collecting cavity is inclined downward from the inside to the outside, and the liquid blocking cylinder is sealed against the supporting cylinder, blocking The upper end of the fluid cylinder protrudes outward to form an annular mounting edge that cooperates with the supporting cylinder. The annular mounting edge is fixed on the supporting cylinder. The annular pressure cover body is provided with an annular notch on its bottom surface that is open on one side of the main shaft. The shaft sleeve is provided with an annular oil groove on the side facing the main shaft. The shaft sleeve is also provided with an oil connection channel that connects the annular notch and the annular oil groove. The main shaft is provided with an upwardly opening longitudinal oiling channel and a first transverse oiling channel that connects the longitudinal oiling channel and the annular notch; an upper bearing cover is provided on the liquid guide sleeve, and the liquid guide sleeve and the upper bearing cover are connected A liquid guide sleeve seal is arranged in between, the upper bearing cover seal is against the upper bearing inner pressure cover and is fixed on the cylindrical bearing seat; the liquid blocking cylinder is provided with a drainage hole at the bottom wall near the liquid collecting chamber, and the support cylinder is provided with a horizontal drainage pipeline connected to the drainage hole on the upper side of the annular boss, and a longitudinal drainage pipeline extending downward is provided in the cylindrical bearing seat, and the longitudinal drainage pipeline passes upward through the annular boss on the support cylinder and is connected to the horizontal drainage pipeline; the main shaft is provided with a lower bearing cover on the lower end sealing sleeve of the support cylinder, and the lower bearing cover is fixed on the support cylinder.

2. The transmission mechanism in the vertical centrifuge according to claim 1, characterized in that: The cylindrical bearing seat is also provided with a longitudinal air injection pipeline extending downward, and the longitudinal air injection pipeline passes upward from the annular mounting boss on the support cylinder. The upper bearing cover is provided with an inner air path channel for connecting the longitudinal air injection pipeline and the liquid collecting chamber.

3. The transmission mechanism in the vertical centrifuge according to claim 1, characterized in that: The lower end of the liquid guiding sleeve is provided with an outwardly protruding annular flow guiding boss.

4. The transmission mechanism in the vertical centrifuge according to claim 3, characterized in that: The annular guide boss is provided with a guide surface which is inclined downward from the inside to the outside.

5. The transmission mechanism in the vertical centrifuge according to claim 1, characterized in that: The outer end of the longitudinal liquid discharge pipeline is connected to an external pipe, a liquid discharge valve is provided on the external pipe, and an observation bottle with a transparent window is provided in the pipeline of the external pipe.

6. The transmission mechanism in the vertical centrifuge according to claim 1, characterized in that: The specific installation method between the upper bearing cover and the upper bearing inner pressure cover is: an annular groove matching the upper end of the upper bearing inner pressure cover is opened on the bottom surface of the upper bearing cover, the upper end of the upper bearing inner pressure cover is clamped in the annular groove, and a sealing ring is provided between the bottom wall of the annular groove and the upper end surface of the upper bearing inner pressure cover.

7. The transmission mechanism in the vertical centrifuge according to claim 1, characterized in that: The main shaft is provided with a bearing bushing between the upper and lower bearings.

8. The transmission mechanism in the vertical centrifuge according to claim 1, characterized in that: A second transverse refueling channel communicating with the longitudinal refueling channel is also provided on the main shaft below the first transverse refueling channel.

9. The transmission mechanism in the vertical centrifuge according to claim 1, characterized in that: The longitudinal liquid discharge pipeline and the longitudinal gas injection pipeline are arranged on both sides of the main shaft.

10. The transmission mechanism of the vertical centrifuge according to any one of claims 1 to 9, characterized in that: The main shaft is movably arranged on the lower bearing cover through a bearing.

Images