CN213575526U - Two-stage conical surface-end surface series contact type mechanical sealing device for sewage pump - Google Patents

Two-stage conical surface-end surface series contact type mechanical sealing device for sewage pump Download PDF

Info

Publication number
CN213575526U
CN213575526U CN202022446106.8U CN202022446106U CN213575526U CN 213575526 U CN213575526 U CN 213575526U CN 202022446106 U CN202022446106 U CN 202022446106U CN 213575526 U CN213575526 U CN 213575526U
Authority
CN
China
Prior art keywords
sealing
main
ring
seal
side gland
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202022446106.8U
Other languages
Chinese (zh)
Inventor
陈刚强
高国奔
李亚飞
冯道臣
娄维尧
杨克允
朱先帅
蔡姚杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang University of Technology ZJUT
Original Assignee
Zhejiang University of Technology ZJUT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang University of Technology ZJUT filed Critical Zhejiang University of Technology ZJUT
Priority to CN202022446106.8U priority Critical patent/CN213575526U/en
Application granted granted Critical
Publication of CN213575526U publication Critical patent/CN213575526U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Mechanical Sealing (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

A two-stage conical surface-end surface series contact type mechanical sealing device for a sewage pump belongs to the technical field of liquid mechanical sealing devices. It comprises a rotating shaft; a shaft sleeve is sleeved on the outer side of the rotating shaft, a main sealing assembly body and a secondary sealing assembly body are sleeved on the outer side of the shaft sleeve in series, and a main sealing side gland and a secondary sealing side gland are respectively and correspondingly arranged on the outer sides of the main sealing assembly body and the secondary sealing assembly body; one side of the main sealing side gland is provided with a sealing device fixing body, the other side of the main sealing side gland is matched with the secondary sealing side gland, and the main sealing side gland, the sealing device fixing body and the sealing side gland are fixedly connected to form a whole. The utility model reduces the adhesive wear degree of the suspended solid particles in the medium by adopting the conical surface sealing fit between the main sealing movable ring and the main sealing static ring; in addition, the cooperation of the end face seal adopted between the secondary seal push ring and the secondary seal static ring forms the secondary seal in series connection, effectively reduces the leakage rate, and improves the safety and the stability of the seal.

Description

Two-stage conical surface-end surface series contact type mechanical sealing device for sewage pump
Technical Field
The utility model belongs to the technical field of liquid mechanical seal device, concretely relates to two-stage conical surface-terminal surface series connection contact formula mechanical seal device for sewage pump.
Background
The mechanical seal is a device for solving the sealing between a rotating shaft and a machine body, and mainly depends on the pre-tightening of an elastic element to a movable ring and a static ring end face sealing pair and the pressing of medium pressure and the elastic element to achieve the sealing of an axial end face sealing device. The mechanical seal is widely applied to rotary machines such as compressors, pumps, reaction kettles and the like with the advantages of low leakage, low power consumption, long service life and the like, and has higher requirements on low power consumption and high reliability of the seal along with the application of the mechanical seal to high and new technical equipment such as nuclear main pumps, space shuttles, high-power aircraft engines, deep sea robots and the like.
The sewage pump is a device for conveying municipal domestic sewage and industrial process sewage to a sewage treatment station at regular time for purification treatment, and sealing is needed for controlling leakage of a polluted medium, so that the design of the mechanical sealing structure for the sewage pump is significant.
At present, most of domestic sewage pump sealing devices use end face sealing. Although the end face seal is more reliable than the packing seal, the performance of the common end face seal can not meet the requirement in a series of practical difficulties. Generally, in the sealing occasions with high-pollution and high-risk process fluids, common contact type double-end-face mechanical sealing is mainly adopted at home and abroad, and blocking fluid with pressure higher than that of a sealed medium is injected between the two seals through a blocking fluid auxiliary system to prevent the sealed medium from leaking to the outside. However, in practical engineering applications, the leakage of the sealed medium cannot be effectively prevented due to various reasons, especially the failure of the blocking fluid auxiliary system, and especially for the process pump which is used for conveying the medium with high solid particle content, is frequently started and stopped and is easy to evacuate, the sealing reliability is far from satisfactory.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned problem that exists among the prior art, the utility model aims to provide a two-stage conical surface-terminal surface series connection contact formula mechanical seal device has improved sealed security, and can reduce the adhesion wear degree of suspension medium on sealed face, and the sealed face of protection further improves sealed stability.
The utility model provides a following technical scheme: a two-stage conical surface-end surface series contact type mechanical sealing device for a sewage pump comprises a rotating shaft; the method is characterized in that: a shaft sleeve is sleeved on the outer side of the rotating shaft, a main seal assembly body and a secondary seal assembly body are sleeved on the outer side of the shaft sleeve in series, and a main seal side gland and a secondary seal side gland are respectively and correspondingly arranged on the outer sides of the main seal assembly body and the secondary seal assembly body;
a sealing device fixing body is arranged on one side of the main sealing side gland, the other side of the main sealing side gland is matched with the secondary sealing side gland, and the main sealing side gland, the sealing device fixing body and the sealing side gland are fixedly connected to form a whole;
a conical surface seal is arranged in the main seal assembly body, and an end face seal is arranged in the main seal side gland;
the main seal assembly body is sequentially provided with a main seal spring seat, a main seal push ring, a main seal movable ring and a main seal static ring along the axial direction of the rotating shaft, a main cylindrical compression spring is arranged between the main seal spring seat and the main seal push ring, a conical surface seal fit is arranged between the main seal movable ring and the main seal static ring, the main seal static ring is connected with the main seal side pressure cover in a positioning mode, and seal structures are arranged between the main seal push ring and the main seal movable ring and between the main seal static ring and the main seal side pressure cover;
the main seal push ring, the main seal movable ring and the main seal static ring are in interference fit with the shaft sleeve.
The utility model provides a two-stage conical surface-terminal surface series connection contact formula mechanical seal device for sewage pump, its characterized in that inferior seal assembly body has set gradually inferior sealing spring seat, inferior sealing throw-out collar, inferior sealing rotating ring and inferior sealing quiet ring along the axial of rotation axis, be provided with inferior cylinder compression spring between inferior sealing spring seat and the inferior sealing throw-out collar, be provided with secondary end face seal cooperation between inferior sealing rotating ring and the inferior sealing quiet ring, inferior sealing quiet ring and inferior sealing side gland location are connected, between inferior sealing throw-out collar and the inferior sealing rotating ring, all there is seal structure between inferior sealing quiet ring and the inferior sealing side gland.
The two-stage conical surface-end surface series contact type mechanical sealing device for the sewage pump is characterized in that the secondary sealing push ring, the secondary sealing movable ring and the secondary sealing static ring are in interference fit with the shaft sleeve.
The two-stage conical surface-end surface series contact type mechanical sealing device for the sewage pump is characterized in that sealing structures are arranged between a sealing device fixing body and a main sealing side gland and between the main sealing side gland and a secondary sealing side gland.
The two-stage conical surface-end surface series contact type mechanical sealing device for the sewage pump is characterized in that an eccentric piece is installed at the outer end of one side of the secondary sealing side gland.
The two-stage conical surface-end surface series contact type mechanical sealing device for the sewage pump is characterized in that the shaft sleeve is fixedly arranged on the outer side of the rotating shaft through a fixing piece, and an end cover retaining ring is arranged at the outer end of the fixing piece.
Through adopting above-mentioned technique, compare with prior art, the beneficial effects of the utility model are as follows:
in the utility model, the movable main seal ring and the static main seal ring are in conical surface sealing fit, the conical surface sealing fit determines the fit of a friction pair which can well keep a seal surface even if the friction pair is worn, and the conical surface sealing contact surface is small, so that the heat dissipation is good, the adhesion wear degree is reduced, and suspended solid particles in a medium are not easy to reside in the conical surface seal surface; in addition, the cooperation of the end face seal adopted between the secondary seal push ring and the secondary seal static ring forms the secondary seal in series connection, effectively reduces the leakage rate, and improves the safety and the stability of the seal.
Drawings
FIG. 1 is a schematic sectional view of the present invention;
FIG. 2 is a schematic cross-sectional view of the main seal assembly of the present invention;
FIG. 3 is a schematic view of the sectional structure of the main seal side pressure cover of the present invention;
fig. 4 is a schematic cross-sectional structure view of the secondary seal assembly of the present invention;
fig. 5 is the schematic view of the sectional structure of the secondary sealing side gland of the present invention.
In the figure: 1. a shaft sleeve; 2. a primary seal assembly; 21. a main seal spring seat; 22. a main cylindrical compression spring; 23. a main seal push ring; 25. A main seal movable ring; 26. a main seal static ring; 4. positioning pins; 5. a main seal side gland; 6. a secondary seal assembly; 61. a secondary seal spring seat; 62. a secondary cylindrical compression spring; 63. secondary sealing push ring; 65. A secondary sealing movable ring; 66. a secondary sealing static ring; 7. a secondary seal side gland; 8. a connecting screw; 9. an eccentric plate; 10. an end cover baffle ring; 11. and a fixing member.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments of the specification. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
On the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in order to provide a better understanding of the present invention to the public, certain specific details are set forth in the following detailed description of the invention. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details.
Referring to fig. 1-5, a two-stage conical surface-end surface series contact type mechanical sealing device for a sewage pump includes a rotating shaft, a shaft sleeve 1 is fixedly installed on the outer side of the rotating shaft through a fixing member 11, the fixing member 11 generally adopts a set screw, and an end cover stop ring 10 is installed on the outer end of the set screw.
The outside series connection of axle sleeve 1 closely overlaps and is equipped with main seal assembly body 2 and inferior seal side gland 7, main seal assembly body 2, the outside correspondence of inferior seal side gland 7 is provided with main seal side gland 5, inferior seal side gland 7, main seal side gland 5 and inferior seal side gland 7 pass through connecting screw 8 fixed mounting on the sealing device fixed body, three part forms a fixed whole, between sealing device fixed body and main seal side gland 5, all be equipped with O type sealing washer between main seal side gland 5 and the inferior seal side gland 7.
As shown in fig. 2, the main seal assembly 2 is sequentially provided with a main seal spring seat 21, a main seal push ring 23, a main seal moving ring 25 and a main seal static ring 26 along the axial direction of the rotating shaft, a main cylindrical compression spring 22 is arranged between the main seal spring seat 21 and the main seal push ring 23, a conical surface seal fit is arranged between the main seal moving ring 25 and the main seal static ring 26, the main seal static ring 26 and the main seal side gland 5 are in positioning connection through a positioning pin 4, and O-shaped seal rings are respectively arranged between the main seal push ring 23 and the main seal moving ring 25 and between the main seal static ring 26 and the main seal side gland 5.
As shown in fig. 4, the secondary seal assembly 6 is provided with a secondary seal spring seat 61, a secondary seal push ring 63, a secondary seal moving ring 65 and a secondary seal static ring 66 in sequence along the axial direction of the rotating shaft, a secondary cylindrical compression spring 62 is provided between the secondary seal spring seat 61 and the secondary seal push ring 63, a secondary end face seal fit is provided between the secondary seal moving ring 65 and the secondary seal static ring 66, the secondary seal static ring 66 and the secondary seal side gland 7 are connected in a positioning manner through a positioning pin 4, and O-shaped seal rings are provided between the secondary seal push ring 63 and the secondary seal moving ring 65, and between the secondary seal static ring 66 and the secondary seal side gland 7.
In the initial stage, the sealing structure of the conical surface seal and the secondary end surface seal in series generates proper pressing force on the contact end surfaces of the main seal moving ring 25 rotating along with the rotating shaft and the main seal static ring 26 not rotating along with the rotating shaft, and generates proper pressing force on the contact end surfaces of the secondary seal moving ring 65 and the secondary seal static ring 66 not rotating along with the rotating shaft, so that the two contact end surfaces are tightly attached, and because the series seal has lower leakage amount and better safety compared with single-stage seal, a layer of extremely thin liquid film is maintained between the end surfaces, thereby achieving the purpose of sealing.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (6)

1. A two-stage conical surface-end surface series contact type mechanical sealing device for a sewage pump comprises a rotating shaft; the method is characterized in that: the outer side of the rotating shaft is sleeved with a shaft sleeve (1), the outer side of the shaft sleeve (1) is sleeved with a main sealing assembly body (2) and a secondary sealing assembly body (6) in series, and the outer sides of the main sealing assembly body (2) and the secondary sealing assembly body (6) are respectively and correspondingly provided with a main sealing side gland (5) and a secondary sealing side gland (7);
a sealing device fixing body is arranged on one side of the main sealing side gland (5), the other side of the main sealing side gland is matched with the secondary sealing side gland (7), and the main sealing side gland (5), the sealing device fixing body and the sealing side gland (7) are fixedly connected to form a whole;
a conical surface seal is arranged in the main seal assembly body (2), and an end face seal is arranged in the main seal side gland (5);
the main seal assembly body (2) is sequentially provided with a main seal spring seat (21), a main seal push ring (23), a main seal moving ring (25) and a main seal static ring (26) along the axial direction of a rotating shaft, a main cylindrical compression spring (22) is arranged between the main seal spring seat (21) and the main seal push ring (23), a conical surface seal fit is arranged between the main seal moving ring (25) and the main seal static ring (26), the main seal static ring (26) is connected with the main seal side gland (5) in a positioning manner, and seal structures are arranged between the main seal push ring (23) and the main seal moving ring (25) and between the main seal static ring (26) and the main seal side gland (5);
the main sealing push ring (23), the main sealing movable ring (25) and the main sealing static ring (26) are in interference fit with the shaft sleeve (1).
2. The two-stage conical surface-end surface series contact type mechanical sealing device for the sewage pump according to claim 1, wherein the secondary sealing assembly (6) is provided with a secondary sealing spring seat (61), a secondary sealing push ring (63), a secondary sealing movable ring (65) and a secondary sealing static ring (66) in sequence along the axial direction of the rotating shaft, a secondary cylindrical compression spring (62) is arranged between the secondary sealing spring seat (61) and the secondary sealing push ring (63), a secondary end surface sealing fit is arranged between the secondary sealing movable ring (65) and the secondary sealing static ring (66), the secondary sealing static ring (66) is connected with the secondary sealing side gland (7) in a positioning manner, and sealing structures are respectively arranged between the secondary sealing push ring (63) and the secondary sealing movable ring (65) and between the secondary sealing static ring (66) and the secondary sealing side gland (7).
3. The two-stage conical surface-end surface series contact type mechanical sealing device for the sewage pump according to claim 2, wherein the secondary sealing push ring (63), the secondary sealing movable ring (65) and the secondary sealing static ring (66) are in interference fit with the shaft sleeve (1).
4. The two-stage conical surface-end surface series contact type mechanical sealing device for the sewage pump according to claim 1, wherein sealing structures are arranged between the sealing device fixing body and the main sealing side gland (5) and between the main sealing side gland (5) and the secondary sealing side gland (7).
5. The two-stage mechanical sealing device with conical surface-end surface series contact for the sewage pump according to claim 1, wherein an eccentric blade (9) is installed at the outer end of one side of the secondary sealing side gland (7).
6. The two-stage mechanical sealing device with conical surface-end surface series contact for the sewage pump according to claim 1, wherein the shaft sleeve (1) is fixedly installed at the outer side of the rotating shaft through a fixing piece (11), and an end cover retaining ring (10) is installed at the outer side end of the fixing piece (11).
CN202022446106.8U 2020-10-29 2020-10-29 Two-stage conical surface-end surface series contact type mechanical sealing device for sewage pump Active CN213575526U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022446106.8U CN213575526U (en) 2020-10-29 2020-10-29 Two-stage conical surface-end surface series contact type mechanical sealing device for sewage pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022446106.8U CN213575526U (en) 2020-10-29 2020-10-29 Two-stage conical surface-end surface series contact type mechanical sealing device for sewage pump

Publications (1)

Publication Number Publication Date
CN213575526U true CN213575526U (en) 2021-06-29

Family

ID=76530587

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202022446106.8U Active CN213575526U (en) 2020-10-29 2020-10-29 Two-stage conical surface-end surface series contact type mechanical sealing device for sewage pump

Country Status (1)

Country Link
CN (1) CN213575526U (en)

Similar Documents

Publication Publication Date Title
CN111577649A (en) Magnetic fluid sealing device for slurry pump
CN213575526U (en) Two-stage conical surface-end surface series contact type mechanical sealing device for sewage pump
CN210715949U (en) Bomb type mechanical sealing device
CN112161064A (en) Two-stage conical surface-end surface series contact type mechanical sealing device for sewage pump
CN111810642A (en) Dynamic sealing structure suitable for low-pressure small-motion-amplitude working condition
CN210716072U (en) Fixed ball valve
CN202690410U (en) Sealing piece structure of pump
CN211599079U (en) Mechanical sealing device
CN208619666U (en) A kind of pump uses double sealing structure
CN211975487U (en) Novel self-cleaning dry gas sealing combined system for pump
CN201844025U (en) Blockage-preventive mechanical sealing device
CN213899878U (en) Sealing device for water pump shaft
CN112065767A (en) Centrifugal pump magnetic sealing system suitable for high-temperature, high-pressure and non-clean working conditions
CN208330827U (en) Salt chemical engineering mechanical sealing device used for pump
CN220185422U (en) Novel shaft seal structure of high-pressure slurry pump
CN213017711U (en) Anti-leakage double-end-face mechanical seal
CN2451817Y (en) Self-tightening endodynamic seal ring
CN211975884U (en) Air film non-contact double-end-face mechanical seal for kettle
CN212868448U (en) Mechanical sealing device of flash tank
CN213685267U (en) Shaft sealing structure
CN213655224U (en) Sealed bearing mechanism for vertical double-suction pump
CN217603352U (en) High-speed fluid dynamic pressure sealing structure for new energy vehicle
CN219159241U (en) Corrosion-resistant and particle-resistant chemical pump sealing device
CN216812116U (en) Hydraulic pump sealing device
CN213451694U (en) Mechanical sealing structure suitable for medium containing particles

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant