CN216629812U - Speed reducer base sealing structure of secondary filter screen - Google Patents
Speed reducer base sealing structure of secondary filter screen Download PDFInfo
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- CN216629812U CN216629812U CN202122671585.8U CN202122671585U CN216629812U CN 216629812 U CN216629812 U CN 216629812U CN 202122671585 U CN202122671585 U CN 202122671585U CN 216629812 U CN216629812 U CN 216629812U
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- speed reducer
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- filter screen
- secondary filter
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Abstract
The utility model relates to a speed reducer base sealing structure of a secondary filter screen, wherein two ends of a speed reducer are respectively connected with a motor and a main shaft, and a sealing cover shell is arranged on a base of the speed reducer; the sealing housing is a cup-shaped housing, the cup opening is connected with a base of the speed reducer, a through hole is formed in the cup bottom, the main shaft penetrates through the through hole, the main shaft and the through hole in the sealing housing are sealed through an upper sealing cover, and the main shaft outside the sealing housing and the through hole are sealed through a lower sealing cover. Compared with the prior art, the sealing structure of the base of the speed reducer is improved, the upper sealing cover and the lower sealing cover are sealed in a double mode through the packing seal, the sealing effect is improved, the parts of the sealing structure are easy to replace, and the disassembly and the part replacement can be carried out under the condition that the operation of a unit and secondary filter screen equipment is not influenced after leakage occurs.
Description
Technical Field
The utility model relates to a shaft end sealing device of a secondary filter screen, in particular to a speed reducer base sealing structure of the secondary filter screen.
Background
At present, open circulating cooling water is mostly adopted in domestic coastal thermal power plants with sufficient water resources, such as rivers, rivers and the like, as cooling water of the unit condenser, sand, impurities and sundries are contained in the water, so that heat exchange pipelines of the unit condenser are easily blocked, and secondary filter screens are arranged on the cooling water inlet sides of the condenser in the power plants for filtering the sundries in the cooling water.
In the operation process of the unit, the secondary filter screen cannot be isolated and cleaned, and when the secondary filter screen intercepts excessive sundries, the water passing amount is reduced, so that the cooling water amount of the unit is reduced, the operation economy of the unit is seriously affected, and therefore a pollution discharge mechanism is often configured for the secondary filter screen. Circulating water enters a secondary filter screen for filtration, when impurities such as suspended matters, plastic films and the like in water are attached to the surface of the secondary filter screen in a certain amount, the internal and external water pressure difference of the secondary filter screen is increased to a specified value of a control system, a sewage discharge mechanism is put into operation to clean impurities intercepted by the secondary filter screen, the sewage discharge mechanism is closed when the internal and external pressure difference is recovered to be normal, and the process is circulated and repeated, so that filtration and sewage discharge are completed.
The sewage discharge mechanism is matched with the secondary filter screen, extends out of the secondary filter screen through a main shaft, and is driven by the motor and the speed reducer to drive the sewage discharge mechanism to work, so that the sewage discharge mechanism scrapes mud and discharges the sewage. The structure of the secondary filter screen and the pollution discharge mechanism is shown in figure 1, a first end of a main shaft is connected with a motor and a speed reducer, a second end of the main shaft is connected with a Y-shaped scraper through a gear box, a bearing chamber and the like, the motor and the speed reducer drive the main shaft to rotate, the rotation of the main shaft is transmitted to the Y-shaped scraper through the gear box and the like, and the Y-shaped scraper is driven to rotate, so that sundries on the secondary filter screen are removed and discharged through a sundry pipeline. In the prior art, a main shaft is sleeved with a protective sleeve, a sealing housing is arranged at the base of a speed reducer at the first end of the main shaft, and the joint of the speed reducer and the main shaft is sealed by a packing.
After long-time operation, the bearing chamber shell is corroded, the main shaft rotates for a long time to be worn, a gap is formed between the main shaft and the gear box, circulating water enters the gear box from the gap, and the circulating water with pressure rises to the top of the protective sleeve. Because the top of the protective sleeve, namely the joint of the speed reducer and the main shaft, is sealed by the packing, the rotation of the main shaft can wear the packing, the sealing surface of the base of the speed reducer is easy to leak, and circulating water can enter the speed reducer and the motor, so that the problems of corrosion of internal parts of the speed reducer, insulation failure of the motor and the like are caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a speed reducer base sealing structure of a secondary filter screen.
The purpose of the utility model can be realized by the following technical scheme:
a speed reducer base sealing structure of a secondary filter screen is characterized in that two ends of a speed reducer are respectively connected with a motor and a main shaft, and a sealing housing is arranged on a base of the speed reducer; the sealing housing is a cup-shaped housing, the cup opening is connected with a base of the speed reducer, a through hole is formed in the cup bottom, the main shaft penetrates through the through hole, the main shaft and the through hole in the sealing housing are sealed through an upper sealing cover, and the main shaft outside the sealing housing and the through hole are sealed through a lower sealing cover.
Preferably, an upper framework oil seal is arranged between the upper sealing cover and the main shaft, and a lower framework oil seal is arranged between the lower sealing cover and the main shaft.
Preferably, the sealed housing is provided with an observation window.
Preferably, the speed reducer is connected with the motor through a transmission shaft and is connected with the main shaft through a coupling.
Preferably, an outer spherical ball bearing is installed at one end of the main shaft connected with the speed reducer.
Preferably, the upper sealing cover is detachably connected with the sealing cover casing, such as screwed connection.
Preferably, the lower sealing cover is detachably connected with the sealing cover casing, such as screwed connection.
Compared with the prior art, the utility model has the following beneficial effects:
(1) the sealing structure of the speed reducer base is improved, the upper sealing cover and the lower sealing cover are sealed and reformed by the packing, the sealing effect is improved, the part replacement of the sealing structure is easy to carry out, and the disassembly and the part replacement can be carried out under the condition that the running of the unit and the secondary filter screen equipment is not influenced after the leakage occurs.
(2) The outer spherical ball bearing is arranged at the shaft end of the main shaft connected with the speed reducer, so that the coaxiality of the main shaft is improved, and the service life and the service cycle of the sealing structure are prolonged.
(3) A protective sleeve on the main shaft is eliminated, water can not enter the gear box and then can not seal the housing through the protective sleeve, and the water is matched with the upper sealing cover and the lower sealing cover, so that the sealing performance of the speed reducer base is guaranteed.
Drawings
FIG. 1 is a schematic structural diagram of a secondary filter screen and a sewage draining mechanism in the prior art;
FIG. 2 is a sealing structure of a base of a reducer in the prior art;
FIG. 3 is a schematic view of the present invention;
FIG. 4 is a schematic view of the connection of the sealing boot to the spindle;
reference numerals: 100. the device comprises a motor, 101, a speed reducer, 102, a sealing housing, 102-1, an observation window, 103, packing, 104, a coupler, 105, an upper sealing cover, 105-1, an upper framework oil seal, 106, a lower sealing cover, 106-1, a lower framework oil seal, 107, an outer spherical ball bearing, 200, a main shaft, 201, a protective sleeve, 300, a gear box, 301, a bearing chamber, 302, a sealing ring, 303, a positioning sleeve, 400, a secondary filter screen, 401, a Y-shaped scraper, 402 and a sundry pipeline.
Detailed Description
The utility model is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
In the drawings, elements that are structurally identical are represented by like reference numerals, and elements that are structurally or functionally similar in each instance are represented by like reference numerals. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. Parts are exaggerated in the drawing where appropriate for clarity of illustration.
Example 1:
in the prior art, as shown in fig. 1 and 2, a first end of a main shaft 100 is connected with a speed reducer 101 and a motor 100, a second end of the main shaft 100 is connected with a gear box 300, and a meshing transmission mechanism such as a gear and a transmission wheel is used, so that the rotation of the main shaft 100 drives a Y-shaped scraper 401 to rotate, thereby scraping mud and discharging sewage to a secondary filter screen 400, a feed inlet (not shown in the figure) is arranged on a sundry pipe 402, cleaned sundries enter the sundry pipe 402 and are discharged, the structures of the gear box 300, a bearing chamber 301, a seal ring 302, a positioning sleeve 303 and the like are all designed conventionally, parts such as an end cover of the gear box 300, an internal 30310 bearing and the like are not shown in the figures, and relevant practitioners can understand conventionally. A sealing housing 102 is installed on a base of the speed reducer 101, a protective sleeve 201 is sleeved on a main shaft 200, the main shaft 200 and the protective sleeve 201 penetrate out of the sealing housing 102, and a packing 103 is arranged at the joint of the main shaft 200 and the speed reducer 101 for sealing so as to prevent circulating water from entering the speed reducer 101 and the motor 100.
However, the sealing structure at the base of the reducer 101 is to be improved: referring to fig. 1 and 2, the main shaft 100 and the gear box 300 below the packing 103 are immersed in water, after long-time operation, the shell of the bearing chamber 301 is corroded, the main shaft 200 rotates for a long time to be worn, a gap is formed between the main shaft 200 and the gear box 300, circulating water enters the gear box 300 through the gap, the circulating water with pressure rises along the protective sleeve 201 and rises to the top of the protective sleeve 201, the top of the protective sleeve 201 is a connection point of the speed reducer 101 and the main shaft 200, the packing 103 is adopted for sealing, the packing 103 is worn due to rotation of the main shaft 100, so that water is easy to leak from the connection point of the speed reducer 101 and the main shaft 200, and the circulating water can enter the speed reducer 101 and the motor 100, so that the problems that internal parts of the speed reducer 101 are corroded, the motor 100 is insulated and fails, and the like are caused.
In order to overcome the above defects, the present application provides a speed reducer base sealing structure of a secondary filter screen, as shown in fig. 2 and 3, two ends of a speed reducer 101 are respectively connected with a motor 100 and a main shaft 200, and a sealing cover 102 is installed on a base of the speed reducer 101; the sealing housing 102 is a cup-shaped housing, the cup opening is connected with the base of the speed reducer 101, a through hole is formed in the cup bottom, the main shaft 200 penetrates through the through hole, the main shaft 200 and the through hole are sealed by the upper sealing cover 105 in the sealing housing 102, and the main shaft 200 and the through hole are sealed by the lower sealing cover 106 outside the sealing housing 102.
The speed reducer 101 includes a planetary gear, a sun gear, a bevel gear, a mounting flange, and the like, one end (bevel gear side) of the speed reducer 101 is connected to the motor 100 through a transmission shaft, and the other end of the speed reducer 101 is connected to the main shaft 200 through a coupling 104.
The end of the main shaft 200 connected with the reducer 101 is provided with the outer spherical ball bearing 107, and the UCFL211 bearing is selected in the embodiment, so that the coaxiality of the two ends of the main shaft 200 can be improved, and the service life and the replacement period of the sealing structure are prolonged.
According to the gearbox, the protective sleeve 201 outside the main shaft 200 is omitted, the main shaft 200 is made of a corrosion-resistant material, and therefore even if circulating water enters gaps of the gearbox 300, the circulating water cannot rise along the protective sleeve 201 to enter the sealing housing 102 like the prior art, the sealing housing 102 isolates the connection position of the speed reducer 101 and the main shaft 200 from the circulating water, and the circulating water cannot enter the sealing housing 102 under the condition that the sealing performance of the upper sealing cover 105 and the lower sealing cover 106 is good.
An upper framework oil seal 105-1 is arranged between the upper sealing cover 105 and the main shaft 200, and a lower framework oil seal 106-1 is arranged between the lower sealing cover 106 and the main shaft 200, so that the sealing performance is ensured. The upper seal cover 105 and the lower seal cover 106 are detachably connected to the seal housing 102, such as by screwing. The upper sealing cover 105 and the lower sealing cover 106 play a double sealing role, and when the sealing performance of the lower sealing cover 106 is reduced due to aging and abrasion, sealing can be realized by the upper sealing cover 105.
In the existing sealing structure, once water leakage occurs, the unit needs to be stopped to run, circulating water is drained, the gear box is opened firstly, the main shaft is disassembled, the sealing structure at the base of the speed reducer 101 is replaced, the operation is complex, the normal operation of the unit is influenced, and the sealing structure replacement can not be carried out under the condition that the unit is not stopped.
According to the application, the observation window 102-1 is arranged on the sealing housing 102, the working condition of the sealing structure in the sealing housing 102 can be observed during non-overhaul, if leakage is found, the speed reducer 101, the coupler 104, the spherical outer ball bearing 107, the upper sealing cover 105 and the upper framework oil seal 105-1 can be independently dismounted under the state that a unit does not stop, the lower sealing cover 106 and the lower framework oil seal 106-1 can be temporarily sealed, circulating water cannot enter the sealing housing 102, and then the upper sealing cover 105, the upper framework oil seal 105-1 and other components are replaced, so that the unit production and the operation of a secondary filter screen system are not influenced.
The foregoing detailed description of the preferred embodiments of the utility model has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A speed reducer base sealing structure of a secondary filter screen is characterized in that two ends of a speed reducer are respectively connected with a motor and a main shaft, and a sealing cover shell is installed on a base of the speed reducer; the sealing housing is a cup-shaped housing, the cup opening is connected with a base of the speed reducer, a through hole is formed in the cup bottom, the main shaft penetrates through the through hole, the main shaft and the through hole in the sealing housing are sealed through an upper sealing cover, and the main shaft outside the sealing housing and the through hole are sealed through a lower sealing cover.
2. The speed reducer base sealing structure of the secondary filter screen according to claim 1, wherein an upper skeleton oil seal is installed between the upper sealing cover and the main shaft, and a lower skeleton oil seal is installed between the lower sealing cover and the main shaft.
3. The speed reducer base sealing structure of a secondary filter screen according to claim 1, wherein an observation window is provided on the sealing cover.
4. The sealing structure of the base of the speed reducer of the secondary filter screen as claimed in claim 1, wherein the speed reducer is connected to the motor through a transmission shaft.
5. The speed reducer base seal structure of a secondary filter screen according to claim 1, wherein the speed reducer is connected to the main shaft through a coupling.
6. The speed reducer base sealing structure of the secondary filter screen according to claim 1, wherein an outer spherical ball bearing is mounted at one end of the main shaft connected with the speed reducer.
7. The reducer base sealing structure of a secondary filter screen according to claim 1, wherein the upper sealing cover is detachably connected to the sealing cover case.
8. The reducer base seal structure of a secondary filter screen according to claim 7, wherein the upper seal cover is screwed to the seal housing.
9. The reducer base sealing structure of a secondary filter screen according to claim 1, wherein the lower sealing cover is detachably connected to the sealing cover case.
10. The reducer base seal structure of a secondary filter screen according to claim 9, wherein the lower seal cover is screwed to the seal housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122671585.8U CN216629812U (en) | 2021-11-03 | 2021-11-03 | Speed reducer base sealing structure of secondary filter screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122671585.8U CN216629812U (en) | 2021-11-03 | 2021-11-03 | Speed reducer base sealing structure of secondary filter screen |
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| Publication Number | Publication Date |
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| CN216629812U true CN216629812U (en) | 2022-05-31 |
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| CN202122671585.8U Active CN216629812U (en) | 2021-11-03 | 2021-11-03 | Speed reducer base sealing structure of secondary filter screen |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113856271A (en) * | 2021-11-03 | 2021-12-31 | 华能上海燃机发电有限责任公司 | Speed reducer base sealing structure of secondary filter screen |
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2021
- 2021-11-03 CN CN202122671585.8U patent/CN216629812U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113856271A (en) * | 2021-11-03 | 2021-12-31 | 华能上海燃机发电有限责任公司 | Speed reducer base sealing structure of secondary filter screen |
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