CN211039683U - Main shaft sealing structure in centrifugal machine - Google Patents
Main shaft sealing structure in centrifugal machine Download PDFInfo
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- CN211039683U CN211039683U CN201921993441.0U CN201921993441U CN211039683U CN 211039683 U CN211039683 U CN 211039683U CN 201921993441 U CN201921993441 U CN 201921993441U CN 211039683 U CN211039683 U CN 211039683U
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Abstract
The utility model discloses a main shaft sealing structure in a centrifuge, a double-spiral sealing sleeve which is fixedly sleeved on a main shaft in a sealing way is arranged between a front bearing seat end cover and the main shaft, two sections of thread sealing grooves are arranged on the outer wall of the double-spiral sealing sleeve along the axial direction, the thread turning directions of the two sections of thread sealing grooves are opposite, the two sections of thread sealing grooves can be communicated with a shielding gas source outside the centrifuge through an air inlet mechanism, the shielding gas source can convey shielding gas to the two sections of thread sealing grooves during working, so that gas seals for sealing the gap between the front bearing seat end cover and the main shaft are respectively formed in the two sections of thread sealing grooves, when the double-spiral sealing sleeve rotates along with the main shaft, the thread sealing groove which is close to a working cavity on the double-spiral sealing sleeve can exhaust the shielding gas which enters the thread sealing groove to the working cavity side, the working cavity and the transmission cavity are sealed and isolated. The utility model discloses there is sealed effectual advantage.
Description
Technical Field
The utility model relates to a centrifuge technical field, concretely relates to main shaft seal structure among centrifuge.
Background
The structure of the centrifuge comprises: the centrifugal machine comprises a centrifugal machine case, a bearing seat is arranged at the bottom of the centrifugal machine case, a main shaft is movably arranged in the bearing seat through a pair of bearings, bearing seat end covers sleeved outside the main shaft are fixedly arranged at two ends of the bearing seat respectively, one end of the main shaft extends into the centrifugal machine case and is fixed with a rotary drum inside the centrifugal machine case, the other end of the main shaft is driven by a motor outside the centrifugal machine case to rotate, one bearing seat end cover close to the rotary drum is defined as a front bearing seat end cover, and the other bearing seat end cover far away from the rotary drum is defined as a rear bearing seat end cover in two bearing seat. During operation, a working cavity is formed in the centrifuge case and used for separating and collecting materials, a transmission cavity is formed in the bearing seat, and lubricating oil for lubricating the bearing is arranged in the transmission cavity. For guaranteeing centrifuge's operating stability, prevent that material, aqueous vapor and corrosive gas in the working chamber from corroding in getting into the transmission chamber through the clearance between front axle bearing end cover and the main shaft and destroying the bearing, must effectively seal the clearance between front axle bearing end cover and the main shaft, promptly: the main shaft sealing structure is arranged between the front bearing seat end cover and the main shaft, so that the working cavity and the transmission cavity cannot be communicated with each other through the main shaft and the front bearing seat end cover. But because the seal lip of oil blanket is very easily burnt and damaged in the high-speed rotatory in-process of main shaft, can cause the clearance again between main shaft and the front bearing seat end cover after the oil blanket burns and reduces, lead to the oil blanket can't continue to carry out the seal isolation to working chamber and transmission chamber, need frequently to change the oil blanket and resume the seal isolation of working chamber and transmission chamber again, this shaft seal structure has shortcomings such as life weak point, stability in use is poor, safety in utilization is low, sealed effect is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a sealed effectual main shaft seal structure in centrifuge.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the spindle sealing structure in the centrifuge is characterized in that a double-spiral sealing sleeve fixedly sleeved on the spindle in a sealing mode is arranged between a front bearing seat end cover and the spindle, two sections of thread sealing grooves are axially arranged on the outer circumferential wall of the double-spiral sealing sleeve, the thread turning directions of the two sections of thread sealing grooves are opposite, an air inlet mechanism communicated with the two sections of thread sealing grooves is further arranged, the two sections of thread sealing grooves can be communicated with a protective air source outside the centrifuge through the air inlet mechanism, protective air can be conveyed to the two sections of thread sealing grooves through the air inlet mechanism during operation, air seals for sealing gaps between the front bearing seat end cover and the spindle are respectively formed in the two sections of thread sealing grooves, and the thread turning directions of the two sections of thread sealing grooves can ensure that the protective air entering the thread sealing grooves can be exhausted to the side of a working cavity through the thread sealing grooves close to the, meanwhile, the thread sealing groove on the double-spiral sealing sleeve, which is close to the transmission cavity, can exhaust the shielding gas entering the thread sealing groove to the transmission cavity side, so that the working cavity and the transmission cavity of the centrifugal machine are sealed and isolated.
Further, the spindle sealing structure in the centrifuge described above, wherein: the structure of the air inlet mechanism comprises: the outer wall of the double-spiral sealing sleeve between the two sections of thread sealing grooves is provided with a circle of annular groove which is simultaneously communicated with the two sections of thread sealing grooves, the end part of the bearing seat fixed with the front bearing seat end cover is provided with an air inlet passage which can be communicated with a protective gas source outside the centrifugal machine, and the front bearing seat end cover is internally provided with an air inlet channel communicated with the air inlet passage and the annular groove.
Further, the spindle sealing structure in the centrifuge described above, wherein: a circle of first sealing groove surrounding the air inlet channel is arranged on the end face of a front bearing seat end cover at the joint of the air inlet channel and the air inlet passage, and a first sealing ring used for sealing a gap between the front bearing seat end cover and a bearing seat is arranged in the first sealing groove.
Further, the spindle sealing structure in the centrifuge described above, wherein: a polytetrafluoroethylene sealing sleeve is arranged between the front bearing seat end cover and the double-spiral sealing sleeve, the polytetrafluoroethylene sealing sleeve is fixed on the front bearing seat end cover and is in contact sealing with the double-spiral sealing sleeve, and an air inlet hole communicated with the air inlet channel and the annular groove is formed in the polytetrafluoroethylene sealing sleeve.
Further, the spindle sealing structure in the centrifuge described above, wherein: an exhaust passage communicated with the outside of the centrifuge is arranged at the end part of the bearing seat fixed with the front bearing seat end cover, a throttle valve is arranged at the exhaust passage, an air outlet communicated with the annular groove is arranged on the polytetrafluoroethylene sealing sleeve, and an exhaust channel communicated with the air outlet and the exhaust passage is arranged in the front bearing seat end cover.
Further, the spindle sealing structure in the centrifuge described above, wherein: and a circle of second sealing groove surrounding the exhaust channel is arranged on the end surface of the front bearing seat end cover at the joint of the exhaust channel and the exhaust passage, and a second sealing ring used for sealing a gap between the front bearing seat end cover and the bearing seat is arranged in the second sealing groove.
Further, the spindle sealing structure in the centrifuge described above, wherein: and a circle of third sealing groove surrounding the air inlet channel and the exhaust channel at the same time is arranged on the end surface of the front bearing seat end cover, and a third sealing ring used for sealing a gap between the front bearing seat end cover and the bearing seat is arranged in the third sealing groove.
Further, the spindle sealing structure in the centrifuge described above, wherein: and a fourth sealing groove for embedding the sealing ring is arranged on the inner circumferential wall of the double-spiral sealing sleeve, and a fourth sealing ring for sealing a gap between the double-spiral sealing sleeve and the main shaft is arranged in the fourth sealing groove.
Through the implementation of the above technical scheme, the beneficial effects of the utility model are that: (1) when the double-spiral sealing sleeve works, nitrogen is introduced into each thread sealing groove on the double-spiral sealing sleeve, so that a multi-section nitrogen seal for sealing a gap between the front bearing seat end cover and the main shaft is formed; (2) when the double-spiral sealing sleeve rotates along with the main shaft during working, the thread sealing groove on the double-spiral sealing sleeve, which is close to the working cavity, can exhaust nitrogen entering the thread sealing groove to the side of the working cavity, so that materials, water vapor and corrosive gas in the working cavity are prevented from flowing to the transmission cavity; meanwhile, the thread sealing groove close to the transmission cavity on the double-spiral sealing sleeve exhausts nitrogen entering the thread sealing groove to the transmission cavity side, so that lubricating oil in the transmission cavity is prevented from flowing to the working cavity, the working cavity and the transmission cavity of the centrifugal machine are effectively sealed and isolated, the sealing effect is good, the service life is long, the use stability is high, and the use safety is high.
Drawings
Fig. 1 is a schematic view of a structural principle of a spindle sealing structure in a centrifuge according to the present invention.
Fig. 2 is an enlarged schematic view of a portion H shown in fig. 1.
Fig. 3 is a schematic structural view of fig. 2 with the first seal ring, the third seal ring and the fourth seal ring omitted.
Fig. 4 is an enlarged schematic view of a portion F shown in fig. 1.
Fig. 5 is a schematic structural view of fig. 4 with the second, third, and fourth seal rings hidden.
Fig. 6 is a schematic structural view of the double spiral gland shown in fig. 1.
Detailed Description
The invention will be further explained with reference to the drawings and the specific embodiments.
In the description of the present invention, it should be understood that the terms "front", "back", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for convenience of description and simplification of description, but does not indicate or imply that the device or element referred to must have a specific orientation and a specific orientation configuration and operation, and thus, the present invention should not be construed as being limited thereto. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
As shown in fig. 1, 2, 3, 4, 5 and 6, the spindle sealing structure in the centrifuge, a double-spiral sealing sleeve 3 fixedly sleeved on the main shaft 2 is arranged between the front bearing seat end cover 1 and the main shaft 2 provided with the rotary drum 23, two sections of thread sealing grooves are axially arranged on the outer circumferential wall of the double-spiral sealing sleeve 3, the centrifugal pump comprises a working cavity 4, a first thread sealing groove 5 and a second thread sealing groove 7, wherein the first thread sealing groove 5 is close to the working cavity 4, the second thread sealing groove 7 is close to a transmission cavity 6, the thread turning directions of the first thread sealing groove 5 and the second thread sealing groove 7 are opposite, an air inlet mechanism communicated with the first thread sealing groove 5 and the second thread sealing groove 7 is further arranged, the first thread sealing groove 5 and the second thread sealing groove 7 can be communicated with a protective air source 8 outside the centrifugal pump through the air inlet mechanism, and in the embodiment, the protective air source 8 is a nitrogen air source; during working, a protective gas source 8 can convey nitrogen gas to the first thread sealing groove 5 and the second thread sealing groove 7 through a gas inlet mechanism, so that nitrogen gas seals for sealing gaps between the front bearing seat end cover 1 and the spindle 2 are respectively formed in the first thread sealing groove 5 and the second thread sealing groove 7, the thread turning directions of the first thread sealing groove 5 and the second thread sealing groove 7 can ensure that when the double-spiral sealing sleeve 3 rotates along with the spindle 2, the first thread sealing groove 5 on the double-spiral sealing sleeve 3 close to the working cavity 4 can exhaust the nitrogen gas entering the first thread sealing groove 5 to the side of the working cavity, and meanwhile, the second thread sealing groove 7 on the double-spiral sealing sleeve 3 close to the transmission cavity 6 can exhaust the nitrogen gas entering the second thread sealing groove 7 to the side of the transmission cavity, so that the working cavity 4 and the transmission cavity 6 of the centrifuge are sealed and isolated; in the embodiment, the spindle 2 rotates clockwise, at this time, the first thread sealing groove 5 close to the working chamber 4 is a right-handed thread sealing groove, and the second thread sealing groove 7 close to the transmission chamber 6 is a left-handed thread sealing groove;
in the present embodiment, the structure of the intake mechanism includes: a circle of annular groove 9 which is simultaneously communicated with two sections of thread sealing grooves is arranged on the outer wall of the double-spiral sealing sleeve between the first thread sealing groove 5 and the second thread sealing groove 7, an air inlet passage 11 which can be communicated with a protective air source 8 outside the centrifuge is arranged at the end part of a bearing seat 10 which is fixed with the front bearing seat end cover 1, and an air inlet channel 12 which is communicated with the air inlet passage 11 and the annular groove 9 is arranged in the front bearing seat end cover 1; during air inlet, nitrogen in the protective gas source 8 enters the air inlet channel 12 from the air inlet passage 11, then enters the annular groove 9 through the air inlet channel 12, and then enters the first thread sealing groove 5 and the second thread sealing groove 7 from two sides through the annular groove 9;
in this embodiment, a circle of first sealing groove 131 surrounding the air inlet channel 12 is arranged on the end surface of the front bearing seat end cover 1 at the joint of the air inlet channel 12 and the air inlet passage 11, and a first sealing ring 13 for sealing the gap between the front bearing seat end cover 1 and the bearing seat 10 is arranged in the first sealing groove 131, so that materials, water vapor and corrosive gas in the working cavity 4 can be prevented from entering the transmission cavity 6 from the gap between the front bearing seat end cover 1 and the bearing seat 10, and meanwhile, lubricating oil in the transmission cavity 6 is prevented from entering the working cavity 4 from the gap between the front bearing seat end cover 1 and the bearing seat 10, the sealed working cavity and the transmission cavity are further isolated, and the operation stability of the equipment is improved;
in the embodiment, a polytetrafluoroethylene sealing sleeve 14 is arranged between the front bearing seat end cover 1 and the double-spiral sealing sleeve 3, the polytetrafluoroethylene sealing sleeve 14 is fixed on the front bearing seat end cover 1 and is in contact sealing with the double-spiral sealing sleeve 3, an air inlet 15 for communicating the air inlet channel 12 with the annular groove 9 is arranged on the polytetrafluoroethylene sealing sleeve 14, a sealing working cavity and a transmission cavity can be further isolated by arranging the polytetrafluoroethylene sealing sleeve 14, the double-spiral sealing sleeve 3 and the front bearing seat end cover 1 can be protected, and the service lives of the double-spiral sealing sleeve 3 and the front bearing seat end cover 1 are prolonged;
in the embodiment, an exhaust passage 16 communicated with the outside of the centrifuge is arranged at the end part of the bearing seat 10 fixed with the front bearing seat end cover 1, a throttle valve 17 is arranged at the exhaust passage 16, an air outlet 18 communicated with the annular groove 9 is arranged on the polytetrafluoroethylene sealing sleeve 14, and an exhaust channel 19 communicated with the air outlet 18 and the exhaust passage 16 is arranged in the front bearing seat end cover 1; when the centrifuge is stopped, the first thread sealing groove 5 on the double-spiral sealing sleeve 3 can not transmit gas to the side of the working cavity any more, and the second thread sealing groove 7 can not transmit gas to the side of the transmission cavity any more, at the moment, the gap between the front bearing seat end cover 1 and the main shaft 2 is mainly sealed by a nitrogen seal, namely, the working cavity and the transmission cavity are mainly sealed by a nitrogen seal in an isolation way, because of pressure fluctuation and other reasons, a small amount of material in the working cavity or the transmission cavity can inevitably enter and stay in the annular groove 9 through the thread sealing groove at the corresponding side, in order to ensure the stability of the operation of the centrifuge when the centrifuge is restarted, the throttle valve 17 is firstly opened, and at the moment, the material staying in the annular groove 9 can sequentially pass through the air outlet 18, the exhaust channel 19, the exhaust passage 16 and the throttle valve 17 to be flushed out of;
in this embodiment, a circle of second sealing groove 201 surrounding the exhaust channel 19 is arranged on the end surface of the front bearing seat end cover 1 at the joint of the exhaust channel 19 and the exhaust passage 16, and a second sealing ring 20 for sealing the gap between the front bearing seat end cover 1 and the bearing seat 10 is arranged in the second sealing groove 201, so that the materials, moisture and corrosive gas in the working cavity 4 can be prevented from entering the transmission cavity 6 from the gap between the front bearing seat end cover 1 and the bearing seat 10, and meanwhile, the lubricating oil in the transmission cavity 6 is prevented from entering the working cavity 4 from the gap between the front bearing seat end cover 1 and the bearing seat 10, the sealed working cavity and the transmission cavity are further isolated, and the operation stability of the equipment is improved; in this embodiment, a circle of third seal groove 211 surrounding the air inlet channel 12 and the air outlet channel 19 at the same time is arranged on the end surface of the front bearing seat end cover 1, and a third seal ring 21 for sealing the gap between the front bearing seat end cover 1 and the bearing seat 10 is arranged in the third seal groove 211, so that the sealed working cavity and the transmission cavity can be further isolated, and the operation stability of the equipment is further improved; in this embodiment, a fourth sealing groove 221 for embedding a sealing ring is arranged on the inner circumferential wall of the double-spiral sealing sleeve 3, and a fourth sealing ring 22 for sealing a gap between the double-spiral sealing sleeve 3 and the main shaft 2 is arranged in the fourth sealing groove 221, so that a sealed working cavity and a transmission cavity can be further isolated, and the operation stability of the equipment is further improved;
the working principle of the utility model is as follows:
when the anti-explosion protective bearing is used, the throttle valve 17 is closed, the protective gas source 8 is opened at the same time, nitrogen in the protective gas source 8 enters the gas inlet channel 12 from the gas inlet passage 11, then enters the annular groove 9 through the gas inlet channel 12, and then enters the first thread sealing groove 5 and the second thread sealing groove 7 from the annular groove 9 to two sides, and at the moment, nitrogen seals with an anti-explosion function for sealing gaps between the front bearing seat end cover 1 and the main shaft 2 are respectively formed in the first thread sealing groove 5, the second thread sealing groove 7 and the annular groove 9; in the working process of the centrifuge, the double-spiral sealing sleeve 3 can rotate along with the main shaft 2, and in the rotating process of the double-spiral sealing sleeve 3 along with the main shaft 2, the first thread sealing groove 5 on the double-spiral sealing sleeve 3, which is close to the working cavity 4, can exhaust nitrogen entering the first thread sealing groove 5 to the side of the working cavity, so that materials, water vapor and corrosive gas in the working cavity 4 are prevented from flowing to the transmission cavity 6; meanwhile, the second thread sealing groove 7 on the double-spiral sealing sleeve 3 close to the transmission cavity 6 can exhaust nitrogen entering the second thread sealing groove 7 to the transmission cavity side, so that lubricating oil in the transmission cavity 6 is prevented from flowing to the working cavity 4, and the working cavity 4 and the transmission cavity 6 of the centrifuge are effectively sealed and isolated;
before the centrifuge is stopped for a period of time and restarted, the throttle valve 17 is opened, at the moment, a small amount of materials staying in the annular groove 9 can be flushed out of the centrifuge through the air outlet 18, the exhaust channel 19, the exhaust passage 16 and the throttle valve 17 in sequence under the action of pressure in the annular groove 9, and the centrifuge is restarted after the small amount of materials in the annular groove 9 are exhausted.
The utility model has the advantages that: (1) when the double-spiral sealing cover works, nitrogen is introduced into each thread sealing groove and the annular groove on the double-spiral sealing cover, so that a multi-section nitrogen seal for sealing a gap between the front bearing seat end cover and the main shaft is formed; (2) when the double-spiral sealing sleeve rotates along with the main shaft during working, the first thread sealing groove on the double-spiral sealing sleeve, which is close to the working cavity, can exhaust nitrogen entering the first thread sealing groove to the side of the working cavity, so that materials, water vapor and corrosive gas in the working cavity are prevented from flowing to the transmission cavity; meanwhile, the second thread sealing groove close to the transmission cavity on the double-spiral sealing sleeve exhausts nitrogen entering the second thread sealing groove to the transmission cavity side, and lubricating oil in the transmission cavity is prevented from flowing to the working cavity, so that the working cavity and the transmission cavity of the centrifugal machine are effectively sealed and isolated, the sealing effect is good, the service life is long, the use stability is high, and the use safety is high.
Claims (9)
1. Main shaft seal structure in centrifuge, its characterized in that: a double-spiral sealing sleeve fixedly sleeved on the main shaft in a sealing manner is arranged between the front bearing seat end cover and the main shaft, two sections of thread sealing grooves are axially arranged on the outer circumferential wall of the double-spiral sealing sleeve, the thread turning directions of the two sections of thread sealing grooves are opposite, an air inlet mechanism communicated with the two sections of thread sealing grooves is also arranged, the two sections of thread sealing grooves can be communicated with a protective air source outside the centrifuge through the air inlet mechanism, the protective air source can convey protective air to the two sections of thread sealing grooves through the air inlet mechanism during operation, so that air seals for sealing gaps between the front bearing seat end cover and the main shaft are respectively formed in the two sections of thread sealing grooves, and the thread turning directions of the two sections of thread sealing grooves can ensure that the protective air entering the thread sealing grooves on the double-spiral sealing sleeve and close to a working cavity, meanwhile, the thread sealing groove on the double-spiral sealing sleeve, which is close to the transmission cavity, can exhaust the shielding gas entering the thread sealing groove to the transmission cavity side, so that the working cavity and the transmission cavity of the centrifugal machine are sealed and isolated.
2. The spindle seal structure in a centrifuge according to claim 1, characterized in that: the structure of the air inlet mechanism comprises: the outer wall of the double-spiral sealing sleeve between the two sections of thread sealing grooves is provided with a circle of annular groove which is simultaneously communicated with the two sections of thread sealing grooves, the end part of the bearing seat fixed with the front bearing seat end cover is provided with an air inlet passage which can be communicated with a protective gas source outside the centrifugal machine, and the front bearing seat end cover is internally provided with an air inlet channel communicated with the air inlet passage and the annular groove.
3. The spindle seal structure in a centrifuge according to claim 2, characterized in that: a circle of first sealing groove surrounding the air inlet channel is arranged on the end face of a front bearing seat end cover at the joint of the air inlet channel and the air inlet passage, and a first sealing ring used for sealing a gap between the front bearing seat end cover and a bearing seat is arranged in the first sealing groove.
4. A main shaft sealing structure in a centrifuge according to claim 2 or 3, characterized in that: a polytetrafluoroethylene sealing sleeve is arranged between the front bearing seat end cover and the double-spiral sealing sleeve, the polytetrafluoroethylene sealing sleeve is fixed on the front bearing seat end cover and is in contact sealing with the double-spiral sealing sleeve, and an air inlet hole communicated with the air inlet channel and the annular groove is formed in the polytetrafluoroethylene sealing sleeve.
5. The spindle seal structure in a centrifuge according to claim 4, characterized in that: an exhaust passage communicated with the outside of the centrifuge is arranged at the end part of the bearing seat fixed with the front bearing seat end cover, a throttle valve is arranged at the exhaust passage, an air outlet communicated with the annular groove is arranged on the polytetrafluoroethylene sealing sleeve, and an exhaust channel communicated with the air outlet and the exhaust passage is arranged in the front bearing seat end cover.
6. The spindle seal structure in a centrifuge according to claim 5, characterized in that: and a circle of second sealing groove surrounding the exhaust channel is arranged on the end surface of the front bearing seat end cover at the joint of the exhaust channel and the exhaust passage, and a second sealing ring used for sealing a gap between the front bearing seat end cover and the bearing seat is arranged in the second sealing groove.
7. The spindle seal structure in a centrifuge according to claim 6, characterized in that: and a circle of third sealing groove surrounding the air inlet channel and the exhaust channel at the same time is arranged on the end surface of the front bearing seat end cover, and a third sealing ring used for sealing a gap between the front bearing seat end cover and the bearing seat is arranged in the third sealing groove.
8. A spindle seal structure in a centrifuge according to claim 1, 2 or 3, characterized in that: and a fourth sealing groove for embedding the sealing ring is arranged on the inner circumferential wall of the double-spiral sealing sleeve, and a fourth sealing ring for sealing a gap between the double-spiral sealing sleeve and the main shaft is arranged in the fourth sealing groove.
9. The spindle seal structure in a centrifuge according to claim 4, characterized in that: and a fourth sealing groove for embedding the sealing ring is arranged on the inner circumferential wall of the double-spiral sealing sleeve, and a fourth sealing ring for sealing a gap between the double-spiral sealing sleeve and the main shaft is arranged in the fourth sealing groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921993441.0U CN211039683U (en) | 2019-11-18 | 2019-11-18 | Main shaft sealing structure in centrifugal machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921993441.0U CN211039683U (en) | 2019-11-18 | 2019-11-18 | Main shaft sealing structure in centrifugal machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211039683U true CN211039683U (en) | 2020-07-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921993441.0U Active CN211039683U (en) | 2019-11-18 | 2019-11-18 | Main shaft sealing structure in centrifugal machine |
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| CN (1) | CN211039683U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020117708A1 (en) | 2020-07-06 | 2022-01-13 | ECOMA M & M Dichtungstechnik GmbH & Co. KG | Seal arrangement for shafts with sealing air seal |
-
2019
- 2019-11-18 CN CN201921993441.0U patent/CN211039683U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020117708A1 (en) | 2020-07-06 | 2022-01-13 | ECOMA M & M Dichtungstechnik GmbH & Co. KG | Seal arrangement for shafts with sealing air seal |
| DE102020117708B4 (en) | 2020-07-06 | 2023-01-12 | ECOMA M & M Dichtungstechnik GmbH & Co. KG | Seal arrangement for shafts with sealing air seal |
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