CN107269712B - Sealing structure of high-efficiency spiral vacuum extrusion molding machine - Google Patents
Sealing structure of high-efficiency spiral vacuum extrusion molding machine Download PDFInfo
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- CN107269712B CN107269712B CN201710615581.3A CN201710615581A CN107269712B CN 107269712 B CN107269712 B CN 107269712B CN 201710615581 A CN201710615581 A CN 201710615581A CN 107269712 B CN107269712 B CN 107269712B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
- F16C33/7806—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for spherical roller bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention relates to a sealing structure of a high-efficiency spiral vacuum extrusion molding machine, which comprises a bearing, a distance sleeve, a bearing cup and a bearing cover, wherein the distance sleeve is sleeved on a main shaft and is connected with the main shaft through a flat key, the bearing is arranged on the distance sleeve, the bearing cup is sleeved on the bearing, the bearing cover is arranged on the main shaft and is connected with the bearing cup, the sealing structure also comprises a front-stage sealing cover and a shaft sleeve, the shaft sleeve is sleeved on the main shaft and is in airtight connection with the distance sleeve, the front-stage sealing cover is sleeved on the shaft sleeve and is in airtight contact with the cover sleeve, the front-stage sealing cover is in airtight connection with the bearing cup, and an airtight cavity is formed among the front-stage sealing cover, the shaft sleeve, the bearing cover and the bearing cup. The invention prevents foreign matters from entering the bearing and causes no pollution to bearing lubricating oil, and avoids the disassembly, cleaning and inspection of the bearing and the damage caused by the reasons.
Description
Technical Field
The invention relates to a sealing structure, in particular to a sealing structure of a high-efficiency spiral vacuum extrusion molding machine.
Background
At present, products such as a brick extruding (discharging) machine, a double-stage vacuum brick extruding (discharging) machine, a pugging machine for ceramic industry, a vacuum pugging machine and the like used for producing sintered products (bricks, ceramic plates and the like) in the building material industry adopt spiral vacuum extrusion molding machines, and the sealing structures and related technical data (the extruders are Li Bo and Gao Ling, the Showchui press is China building material industry press) of the spiral vacuum extrusion molding machines are sealed only through distance sleeves, bearing cups and bearing covers.
The current industry adopts the structural principle to be different in form. The bearing chamber on the existing spiral vacuum extrusion molding machine is fixed on the raw material chamber (also called as a vacuum box body) and is in sealing connection through bolt fixation, and the spiral vacuum extrusion molding machine has three key technical index requirements; 1. the allowable extruder pressure (2.0-4.0 MPa), the vacuum degree (minus 0.092 MPa) and the production rate (ten thousands/hr) of 3 hours. Both of the preceding two relate to bearing chambers; the bearing chamber of the spiral vacuum extrusion molding machine is a core part because of the bearing chamber stress structure and the bearing chamber sealing structure.
The structure of the existing bearing chamber is as follows: bearing cup (the bearing cup is fixed with the raw material chamber through bolt connection, a sealed O-shaped ring is arranged between two fixing surfaces), a thrust aligning roller bearing (the thrust aligning roller bearing is arranged in the bearing cup, the end face of an outer ring is fixed on the back cover (bottom) of the bearing cup, an inner ring is fixed on the shaft), a distance sleeve (the distance sleeve is fixed on the shaft, an outer flange is clamped between the left bearing and the right bearing, two end faces are propped against the two bearing inner rings to ensure that the two bearings are separated by a certain distance), an aligning roller bearing (the bearing outer ring is fixed in the bearing cup, the inner ring is arranged on the distance sleeve, one end face of the inner ring is propped against a nut locking nut), a shaft sleeve (the shaft sleeve is arranged on the shaft, the shaft sleeve and the distance sleeve are in threaded connection with one end face of the distance sleeve to be propped against the end face of the distance sleeve, one end face is propped against the end face of the spiral cone, the sealing O-shaped ring is arranged on the inner ring of the shaft sleeve to ensure the sealing between the main shaft and the shaft sleeve), a bearing cover (the bearing cover is fixed on the end surface step of the bearing cup by bolts and sealed by the O-shaped ring between the two positioning surfaces, a boss at one end of the bearing cover is arranged in the bearing cup to be used for positioning the outer ring of the aligning roller bearing, a lip-shaped sealing ring is arranged in the inner hole of the bearing cover, the lip-shaped sealing ring is matched with the outer ring of the shaft sleeve to be used as the independent sealing of the bearing part), a labyrinth static disc (also used as the bearing cover) (the labyrinth static disc is fixed on the end surface step of the bearing cup by bolts and sealed by the O-shaped ring between the two fixing surfaces), a boss at one end of the labyrinth static disc is arranged in the bearing cup to be used for positioning the outer ring of the aligning roller bearing, a labyrinth groove is arranged on the other end surface to be matched with a movable labyrinth to form labyrinth seal, the inner hole of the labyrinth static disc is a boss hole, 3 lip-shaped sealing rings are arranged in the hole, the lip of the lip seal ring is matched with the outer ring of the shaft sleeve to form seal). The bearing chamber is formed by the matching connection of the parts, the whole body of the bearing chamber is sealed and fixed on a vacuum box body (the vacuum box body is a sealed environment capable of forming negative pressure) of a spiral vacuum extrusion molding machine, and the vacuum box body can meet the sealing isolation of water, oil and gas outside the vacuum box body under certain conditions after the connection of the bearing chamber.
The spiral vacuum extrusion molding machine is a large-scale device, and the maintenance of the sealing part of the main shaft is very difficult on the production site due to the influence of adjacent devices. In practical use, the problem that the raw materials of the extrusion molding machine enter the bearing chamber to damage the bearing due to the damage of the sealing structure often occurs. If the vacuum extrusion process is used, besides raw materials can enter a bearing chamber after the seal (oil seal) is damaged, the negative pressure of the vacuum chamber can suck lubricating oil in the bearing to cause bearing heating and locking, the vacuum degree of the vacuum chamber can be seriously reduced due to the seal damage of the vacuum extruder, even if the problem can be found at early stage, the whole main shaft part (comprising the bearing chamber) also has to be disassembled when the maintenance is carried out, after the bearing is disassembled, whether foreign matters such as raw materials of products enter the bearing, whether the bearing is damaged (the actual situation is more than eighty percent damaged and replaced), and damaged sealing elements are replaced, etc., because the vacuum (raw materials) chamber and the bearing chamber of the spiral vacuum brick extruding (discharging) machine are isolated and sealed by a group of oil seals. Too high a temperature rise of the main bearing in normal use means a failure of the seal, and such a failure of the seal is not easily detected and confirmed at an early stage. After a problem, the whole main shaft part is required to be disassembled and assembled, including the replacement and maintenance of bearings and other sealing elements. All the materials need to be salvaged, the workload is very large, and even the situation that the kiln is not burned and production is stopped because the kiln cannot be timely repaired occurs.
Disclosure of Invention
The invention aims to solve the technical problems that: the sealing structure of the high-efficiency spiral vacuum extrusion molding machine can well protect the bearing.
The technical scheme for solving the technical problems is as follows: the utility model provides a seal structure of high-efficient spiral vacuum extrusion molding machine, includes bearing, distance cover, bearing cup and bearing cap, the distance cover install on the main shaft and link with the main shaft through the parallel key, the bearing inner circle install on the distance cover, the bearing outer lane install in the bearing cup, the bearing cap set up on the main shaft and be connected with the bearing cup, still include preceding sealed lid and axle sleeve, the axle sleeve cover on the main shaft and be connected with the distance cover, preceding sealed lid cover on the axle sleeve and with axle sleeve airtight contact, preceding sealed lid and bearing cup sealing connection, preceding sealed lid, axle sleeve, bearing cap and bearing cup between form a controllable airtight cavity.
The invention further adopts the technical scheme that: a lip-shaped sealing ring and a felt oil seal are arranged between the front-stage sealing cover and the shaft sleeve, and the felt oil seal is positioned at one end of the front-stage sealing cover, which is close to the vacuum box body.
The oil injection device comprises an oil pump, a valve I and a pressure-resistant oil pipe, one end of the pressure-resistant oil pipe is connected with the oil pump through the valve I, the other end of the pressure-resistant oil pipe is positioned in the airtight cavity and is arranged on the front-stage sealing cover through the pipe joint, the front-stage sealing cover is provided with an oil injection hole, and the pressure-resistant oil pipe is communicated with an oil ring between the front-stage sealing cover and the shaft sleeve through the oil injection hole.
The device comprises a gas pipe, a flowmeter, a pressure gauge and a valve II, wherein the flowmeter, the pressure gauge and the valve II are arranged on the gas pipe, and two ends of the gas pipe are communicated with a closed chamber and an external atmosphere respectively.
The bearing cover is sleeved on the shaft sleeve, and the bearing cover is sealed with the shaft sleeve through the lip-shaped sealing ring.
An O-shaped ring is arranged at the joint of the front sealing cover and the bearing cup.
An O-shaped ring is arranged between the shaft sleeve and the main shaft.
An O-shaped ring is arranged at the joint of the bearing cover and the bearing cup.
Due to the adoption of the technical scheme, the sealing structure of the high-efficiency spiral vacuum extrusion molding machine has the following beneficial effects:
1. the invention comprises a front-stage sealing cover and a shaft sleeve, wherein the front-stage sealing cover is sleeved on the shaft sleeve and is in airtight contact with the cover sleeve. The front-stage sealing cover is an independent sealing part, and the sealing part on the front-stage sealing cover can be independently detached for replacement and maintenance, so that the performance of the spiral vacuum extrusion molding machine and the quality of products can be effectively ensured by timely maintenance, foreign matters are prevented from entering the bearing seal, and the damage to the bearing caused by the disassembly, cleaning and inspection can be avoided. The replacement of the vacuum seal on the damaged front-stage seal cover is much more convenient and simpler than the maintenance and replacement of the bearing, and the bearing seal can be inspected and replaced when the damaged vacuum seal is replaced. The invention greatly reduces the loss, shortens the maintenance time by eighty percent at least, and improves the service efficiency of the equipment.
2. The observation control device arranged on the bearing cup can reflect the sealing capability of the vacuum sealing piece of the front-stage sealing cover, and can judge the working state of the vacuum sealing piece according to the size of air leakage and the pressure difference of two sides of the vacuum sealing piece to provide a basis for maintenance time. When the valve of the control device is closed (normally open), a sealing cavity can be formed in a communicated cavity, and under the condition that the sealing of the front-stage sealing cover is damaged and normal production cannot be performed, the valve can be closed, and the sealing of the bearing cover is utilized to establish a secondary sealing relative to the vacuum box body so as to ensure that the pressure of the vacuum box body is used for emergency production, thereby avoiding the production of contrast imaging due to maintenance.
3. The independent lubricating oil filling device of the front-stage sealing cover can regularly fill oil, so that the relative cleanness of the lubricating oil of the vacuum sealing element is ensured, and the service life of the sealing element can be prolonged.
4. The front-stage sealing cover is an independent component, and can be independently disassembled and assembled to replace the vacuum sealing piece, so that the maintenance work is quick, simple and easy.
The technical features of the sealing structure of the high-efficiency screw vacuum extrusion molding machine according to the present invention will be further described below with reference to the accompanying drawings and specific examples.
Drawings
Fig. 1 and fig. 2 are schematic structural views of a sealing structure of a high-efficiency spiral vacuum extrusion molding machine according to the present invention.
In the above figures, the reference numerals are as follows:
the vacuum box comprises a 1-vacuum box body, a 2-bearing cup, a 3-O-shaped ring, a 4-adapter, a 5-pressure gauge, a 6-valve II, a 7-bearing cover, an 8-O-shaped ring, a 9-lip seal ring, a 10-shaft sleeve, a 11-main shaft, a 12-O-shaped ring, a 13-front seal cover, a 14-felt seal, a 15-lip seal, a 16-oil ring, a 17-pipe joint, a 18-pressure-resistant oil pipe, a 19-valve I, a 20-oil pump, a 21-valve III, a 22-O-shaped ring, a 23-distance sleeve, a 24-flat key and a 25-bearing.
Detailed Description
The utility model provides a seal structure of high-efficient spiral vacuum extrusion molding machine, includes bearing, distance cover, bearing cup, bearing cap, preceding sealed lid, axle sleeve, oiling device and observation controlling means, the distance cover install on the main shaft and link with the main shaft through the parallel key, the bearing inner race install on the distance cover, the bearing outer lane install in the bearing cup, the bearing cap set up on the main shaft and be connected with the bearing cup, bearing cap, axle sleeve, bearing set up in the bearing cup inside, the axle sleeve cover on the main shaft and with distance cover sealing connection, preceding sealed lid cover on the axle sleeve and with axle sleeve sealing contact, preceding sealed lid and bearing cup sealing connection, preceding sealed lid set up in the bearing cup outer end to be located bearing cap one side, the sealed lid of preceding stage be located bearing cap and be close to vacuum box one side, preceding sealed lid, axle sleeve, bearing cap and bearing cup between form a airtight cavity, this airtight cavity is controllable normal pressure sealing cavity. The novel anti-theft lock is characterized in that one end of the shaft sleeve is provided with a stepped spigot I which is connected with the distance sleeve, the spigot I is provided with threads, one end of the distance sleeve is provided with a spigot II corresponding to the spigot I, and the spigot II is also provided with threads. The sealing between the front-stage sealing cover and the shaft sleeve ensures the requirement of the spiral vacuum extrusion molding machine on the vacuum degree, the sealing piece of the original sealing is not subjected to negative pressure in the sealable cavity and only protects the bearing, but the vacuum sealing performance of the sealing piece is not changed, the service life of the original sealing piece is greatly prolonged, the safety and the service life of the bearing are also ensured, the sealable cavity is controllable, the airtight cavity is formed after the sealable cavity is separated from the external atmosphere, the original sealing has the capability of auxiliary sealing when the vacuum sealing of the front-stage sealing cover is effective, the sealing function of the original vacuum sealing can be exerted after the vacuum sealing of the front-stage sealing cover fails, the vacuum requirement of the sealing between the front-stage sealing cover and the shaft sleeve on the vacuum extrusion machine is increased, the secondary sealing of the secondary vacuum sealing protection is realized, and the sealing between the original bearing cover and the main shaft is the primary sealing. The bearing cover is sleeved on the shaft sleeve, and the bearing cover and the shaft sleeve are sealed through the lip-shaped sealing ring. The sealing device is characterized in that a lip-shaped sealing ring and a felt-ring oil seal are arranged between the front-stage sealing cover and the shaft sleeve, a gap between the front-stage sealing cover and the shaft sleeve is sealed through the lip-shaped sealing ring and the felt-ring oil seal, the felt-ring oil seal is positioned at one end of the front-stage sealing cover, which is close to the vacuum box body, and an opening of the lip-shaped sealing ring faces to one end of the front-stage sealing cover, which is far away from the vacuum box body. The oiling device comprises an oil pump, a valve I and a pressure-resistant oil pipe, wherein one end of the pressure-resistant oil pipe is connected with the oil pump through the valve I, the other end of the pressure-resistant oil pipe is positioned in a sealed cavity and is arranged on a front-stage sealing cover through a pipe joint, the front-stage sealing cover is provided with an oil injection hole, the pressure-resistant oil pipe is communicated with a gap between the front-stage sealing cover and a shaft sleeve through the oil injection hole, an oil ring is arranged in the gap between the front-stage sealing cover and the shaft sleeve, the oil ring is communicated with the pressure-resistant oil pipe, the oil ring is positioned between lip-shaped sealing rings, and the pressure-resistant oil pipe is arranged on a bearing cup through a conversion joint. The raw materials extruded into the gap between the front-stage sealing cover and the shaft sleeve can be pressed back into the vacuum box body through the oiling device. The observation control device comprises an air pipe, a flowmeter, a pressure gauge and a valve II, wherein the flowmeter, the pressure gauge and the valve II are arranged on the air pipe, and two ends of the air pipe are communicated with the closed cavity and the external atmosphere respectively. When the vacuum extrusion molding machine is used, the valve II is in an open state, the closed cavity is communicated with the atmosphere through the air pipe, the shaft sleeve rotates along with the main shaft, if the tightness between the front-stage sealing cover and the shaft sleeve is damaged, the closed cavity is communicated with the vacuum box body, air in the closed cavity can form a negative pressure state due to being pumped away, at the moment, the leakage air quantity is displayed because external air flows into the closed cavity through the flowmeter, the damage degree of the tightness can be judged according to the air flow, the valve II can be closed at the moment, the first-stage sealing is started when the valve II is closed, at the moment, the spiral vacuum extrusion molding machine can be recovered to normal production because the first-stage sealing ensures the requirement of the machine on the vacuum degree, and the loss caused by the sudden shutdown maintenance is prevented. An O-shaped ring is arranged at the joint of the front sealing cover and the bearing cup. An O-shaped ring is arranged between the shaft sleeve and the main shaft. An O-shaped ring is arranged at the joint of the bearing cover and the bearing cup. The bearing cover is fixed on the end surface step of the bearing cup by bolts, the two positioning surfaces are sealed by O-shaped rings, a boss at one end of the bearing cover is arranged in the bearing cup to be used for positioning the outer ring of the self-aligning roller bearing, a lip-shaped sealing ring is arranged in an inner hole of the bearing cover, and the lip of the lip-shaped sealing ring is matched with the outer ring of the shaft sleeve to be used as independent sealing of a bearing part. The inner hole of the front sealing cover is provided with 3 lip-shaped sealing rings, and the lips of the lip-shaped sealing rings are in sealing fit with the outer ring of the shaft sleeve to separate a vacuum chamber from the sealing chamber.
Working principle:
when the spiral vacuum extrusion molding machine works, the vacuum box body is in a negative pressure environment (less than or equal to-0.092 MPa), and the raw materials are all external parts connected with the soil, so that the raw materials can be prevented from penetrating and sealed, and the requirements of the whole equipment can be met. The vacuum box body (namely the raw material chamber) is a sealing box body capable of being pumped into negative pressure, and the sealing performance of the sealing box body and parts connected with the sealing box body can meet the requirements of the whole set of equipment, and the sealing box body is aimed at the phenomenon that a bearing chamber (a core part) of a traditional spiral vacuum extrusion molding machine is easy to damage, difficult to replace, difficult to find and difficult to maintain, and a secondary sealing scheme is developed by the organization and technology of our company. The structure comprises a vacuum box body (raw material chamber), a bearing cup cover and a front-stage sealing cover.
The core of the spiral vacuum extrusion molding machine is a bearing chamber, and the core of the bearing chamber is the seal of a bearing cover; the sealing of the bearing cover needs to ensure that no air leakage exists when the vacuum box body is under negative pressure, raw materials and dust in the vacuum box body cannot permeate through the bearing cover, and bearing lubricating oil cannot leak and cannot be pumped away by the negative pressure. The operating environment of the bearing cap seal is modified in combination with the foregoing options, the operating environment being determined by the operational relationship of each other.
The invention adds a front sealing cover between the vacuum box inner cavity and the bearing cover, bears the protection requirements of the bearing cover sealing piece on the sealing, bearing and raw material infiltration prevention of the vacuum box inner cavity, and meets the production process requirements of the vacuum box inner cavity negative pressure.
The front-stage sealing cover is provided with a bolt which is fixed at the end head of the bearing cup and is in sealing connection with the bearing cup, so that a sealed normal pressure chamber is formed between the front-stage sealing cover and the original bearing cup, the bearing cover and the shaft sleeve. Therefore, the original working environment of oil sealing, gas sealing, pressure bearing and raw material infiltration prevention is changed into the working environment with normal pressure at two sides, the use requirement of the bearing cover sealing element is changed into the working environment with normal pressure at two sides, dust and impurities are prevented from entering the bearing chamber under normal pressure, the grease leakage of the bearing chamber is prevented under normal pressure, the original oil sealing, gas sealing, pressure bearing and raw material infiltration prevention performances of the bearing cover sealing element exist, the performances of the bearing cover sealing element can be exerted when the external factors change, the sealing air leakage and damage of the current-stage sealing cover can be exerted by utilizing the characteristics, the sealing effect of the bearing cover sealing element can be exerted, the pressure difference is established at two sides of the bearing cover, and the sealing normal pressure chamber formed by the previous-stage sealing cover, the original bearing cup, the bearing cover and the shaft sleeve can be changed into a negative pressure chamber, so that the establishment of secondary negative pressure and the secondary protection of the bearing are realized.
In order to change the working environment of the sealing element of the bearing cover, the normal pressure state of the built sealing normal pressure chamber can cause the pressure change of the normal pressure chamber due to the change of the performance of the sealing element of the front sealing cover, the change is measurable, the working state and the sealing condition of the front sealing cover can be known through analysis of measured data, and the starting of the secondary sealing is determined by controlling whether the sealing normal pressure chamber is communicated with the outside atmosphere.
Vacuum box: the vacuum box body is fixed on the underframe, the bearing cup seam allowance is arranged in the shaft hole of the vacuum box body, the shaft hole seam allowance is provided with a ring, the outer flange of the bearing cup is connected with two planes of the boss of the shaft hole of the vacuum box body by bolts, and the O-shaped ring is clamped between the two planes.
Bearing chamber: the bearing chamber of the invention has the same working principle as the original bearing chamber of the spiral vacuum extrusion molding machine, and parts with different characteristics, such as bearing cups, bearing covers and shaft sleeves, are similar in structure.
The bearing cup of the invention is characterized in that: the bearing cup is lengthened on the basis of the prior art, the end head of the bearing cup is an outer flange interface flange, the end head is provided with a spigot for connecting and installing other parts, the inner cavity of the bearing cup is provided with a front step spigot and a rear step spigot and an inner flange, the outer flange interface flange is provided with two holes which are in crossed intercommunication, one hole is communicated with the inner cavity of the bearing cup in a straight way, the outer wall of the bearing cup is provided with a pipe joint, and the other hole is externally connected with a flowmeter and a vacuum pressure gauge and is connected with a valve;
bearing cap: the bearing cap of the invention is characterized in that: the outer circular flange surface of the bearing cover is fixed on the spigot of the bearing cup, which is connected with the spigot by bolts, the O-shaped ring is arranged at the spigot of the bearing cover and is sealed with the inner wall of the bearing cup, and the lip-shaped sealing ring is fixed at the flange of the inner hole of the bearing cover.
A shaft sleeve: the shaft sleeve of the invention is characterized in that: one end of the inner hole of the shaft sleeve is provided with a stepped spigot for connecting with the distance sleeve, the wall of the spigot is provided with threads, the inner hole of the shaft sleeve is sleeved on the main shaft, an O-shaped ring is arranged between the shaft sleeve and the main shaft for sealing, the shaft sleeve is fixed with the distance sleeve through threaded connection, the main shaft is arranged in the hole of the distance sleeve and is provided with a flat key for matching connection, the shaft sleeve extends into the hole of the bearing cover, and the outer round surface of the shaft sleeve is matched and sealed with the lip of the lip-shaped sealing ring.
Front sealing cover: the front-stage sealing cover provided by the invention is characterized in that: the inner hole of the front-stage sealing cover is provided with a groove provided with a felt ring oil seal, the end face of the inner hole of the front-stage sealing cover is provided with a boss in which a lip-shaped sealing ring is arranged, namely, the inner wall of the front-stage sealing cover is provided with a groove for placing the felt ring oil seal, the outer wall of the front-stage sealing cover is provided with a connecting part connected with a bearing cup, and the front-stage sealing cover is provided with a boss for placing the lip-shaped sealing ring. The oil ring is arranged between the lip-shaped sealing rings, the outer groove of the oil ring is in direct correspondence with the inner cavity of the bearing cup, the pipe joint is connected with a lubricating oil pipe and is fixed on the direct through hole of the cavity of the bearing cup, the valve is opened only when lubricating oil is filled and is connected to the lubricating oil supply device, the valve is a bearing lubricating oil filling control switch, the outer circular spigot of the front-stage sealing cover is fixed in the inner cavity of the bearing cup and is connected with the inner cavity of the bearing cup through bolts, and the female spigot of the end face of the bearing cup is provided with the sealing ring.
Claims (7)
1. The utility model provides a seal structure of high-efficient spiral vacuum extrusion molding machine, includes bearing, distance cover, bearing cup, bearing cap and observation control device, the distance cover install on the main shaft and link with the main shaft through the parallel key, the bearing inner circle install on the distance cover, the bearing outer lane install in the bearing cup, the bearing cap set up on the main shaft and be connected with the bearing cup, its characterized in that: the device comprises a spindle, a bearing cup, a front-stage sealing cover, a bearing cup, a shaft sleeve, a fixed-distance sleeve, a shaft sleeve, a bearing sleeve and a bearing sleeve, wherein the spindle is sleeved with the front-stage sealing cover and is connected with the fixed-distance sleeve; the observation control device comprises an air pipe, a flowmeter, a pressure gauge and a valve II, wherein the flowmeter, the pressure gauge and the valve II are arranged on the air pipe, and two ends of the air pipe are communicated with the closed cavity and the external atmosphere respectively.
2. The sealing structure of the high-efficiency spiral vacuum extrusion molding machine according to claim 1, wherein: a lip-shaped sealing ring and a felt oil seal are arranged between the front-stage sealing cover and the shaft sleeve, and the felt oil seal is positioned at one end of the front-stage sealing cover, which is close to the vacuum box body.
3. The sealing structure of the high-efficiency spiral vacuum extrusion molding machine according to claim 2, wherein: the oil injection device comprises an oil pump, a valve I and a pressure-resistant oil pipe, one end of the pressure-resistant oil pipe is connected with the oil pump through the valve I, the other end of the pressure-resistant oil pipe is positioned in the airtight cavity and is arranged on the front-stage sealing cover through the pipe joint, the front-stage sealing cover is provided with an oil injection hole, and the pressure-resistant oil pipe is communicated with an oil ring between the front-stage sealing cover and the shaft sleeve through the oil injection hole.
4. The sealing structure of the high-efficiency spiral vacuum extrusion molding machine according to claim 1, wherein: the bearing cover is sleeved on the shaft sleeve, and the bearing cover is sealed with the shaft sleeve through the lip-shaped sealing ring.
5. The sealing structure of the high-efficiency spiral vacuum extrusion molding machine according to claim 1, wherein: an O-shaped ring is arranged at the joint of the front sealing cover and the bearing cup.
6. The sealing structure of the high-efficiency spiral vacuum extrusion molding machine according to claim 1, wherein: an O-shaped ring is arranged between the shaft sleeve and the main shaft.
7. The sealing structure of the high-efficiency spiral vacuum extrusion molding machine according to claim 1, wherein: an O-shaped ring is arranged at the joint of the bearing cover and the bearing cup.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710615581.3A CN107269712B (en) | 2017-07-26 | 2017-07-26 | Sealing structure of high-efficiency spiral vacuum extrusion molding machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710615581.3A CN107269712B (en) | 2017-07-26 | 2017-07-26 | Sealing structure of high-efficiency spiral vacuum extrusion molding machine |
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| Publication Number | Publication Date |
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| CN107269712A CN107269712A (en) | 2017-10-20 |
| CN107269712B true CN107269712B (en) | 2023-05-02 |
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| CN201710615581.3A Active CN107269712B (en) | 2017-07-26 | 2017-07-26 | Sealing structure of high-efficiency spiral vacuum extrusion molding machine |
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