A new type of double-end cartridge mechanical seal for mud pumps
By adopting a double-end-faced integrated mechanical seal and P 1 an54 flushing solution in the mud pump, the problems of leakage, high power consumption and short service life of mud pump sealing equipment in the prior art are solved, and a more efficient and environmentally friendly sealing effect is achieved.
Patent Information
- Application Number
- CN202421493367.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-27
AI Technical Summary
The packing seals and standard component mechanical seals used in existing mud pumps have problems such as large leakage, high power consumption, wear shafts, short service life and waste of water resources.
The dual-end surface integrated mechanical seal is adopted, including shaft sleeve, positioning ring, inner shaft sleeve, gland, static ring and inlay assembly. Through the dual-end surface seal and P 1 an54 flushing scheme, pure water is used as the circulation isolation liquid to achieve the sealing annular liquid film provided by pure isolation liquid, and adopts technical means such as double balance design, back-to-back structure and silicon carbide friction pair.
Effectively reduce leakage, extend sealing life, save water resources, prevent environmental pollution caused by medium leakage, and take away the heat from the friction pair, reducing cooling and consumption.
Smart Images
Figure CN222717444U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mechanical seals, in particular to a novel double-end-surface container-type mechanical seal for mud pumps. Background Art
[0002] Mechanical seals are a type of sealing method widely used in transmission machinery. Their main function is to control the flow of fluid inside the machine to avoid leakage. Mechanical seals can also play such a role in mud pumps, such as controlling mud flow and avoiding internal leakage of mud pumps. Of course, mechanical seals also have disadvantages. The sealing materials they use are easy to wear, and the machine needs to be disassembled and repaired when replacing mechanical seals.
[0003] The packing seals or standard component mechanical seals used in the mud pumps in the prior art have certain disadvantages. The packing seals have large leakage, high power consumption, wear shafts, and short service life. At the same time, cooling water is required to continuously flush and cool the packing, and the failure of cooling water to circulate will lead to waste of water resources. The standard component mechanical seal has a single spring external structure, and the spring is prone to blockage and seal failure over time. In addition, the installation is cumbersome and the accuracy is poor. Therefore, a new double-end container mechanical seal for mud pumps is proposed. Utility Model Content
[0004] The purpose of the utility model is to solve the problem that the packing seal or standard component type mechanical seal used in the mud pump in the prior art has certain disadvantages. The utility model provides a new type of double-end container type mechanical seal for mud pumps.
[0005] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:
[0006] A new type of double-end face containerized mechanical seal for mud pumps includes a sleeve, an outer sleeve of the sleeve is provided with a locating ring, an inner sleeve is inserted at one end of the sleeve away from the locating ring, two static rings are provided on the outer sleeve, and a gland is provided on the outer side of the two static rings. The outer sides of the sleeve are respectively provided with inlay components on both sides of the gland, and an O-ring three is inlaid and installed on one side of the gland close to the inner sleeve. Four plug-in cylindrical pins one are evenly distributed on the side of the locating ring close to the gland, four plug-in cylindrical pins one are evenly distributed on the outer wall of the sleeve, four plug-in cylindrical pins two are evenly distributed between the two static rings, and four clamped locating blocks are evenly distributed on the side of the gland away from the inner sleeve, each locating block is threadedly connected with a locating screw one at one end away from the gland, and the bottom end of each locating screw one is threadedly connected to the inside of the locating ring, and a locating screw two is provided at the inside of the locating ring corresponding to the bottom end of each locating screw one, and the bottom end of each locating screw two is threadedly connected to the inside of the sleeve.
[0007] Furthermore, an expansion sleeve inner ring is sleeved on the end of the outer part of the sleeve away from the inner sleeve, an expansion sleeve fixing ring is sleeved on the end of the outer part of the expansion sleeve inner ring close to the inner sleeve, an expansion sleeve pressure ring is sleeved on the end of the outer part of the expansion sleeve inner ring away from the inner sleeve, the expansion sleeve fixing ring and the expansion sleeve pressure ring are connected by a number of evenly distributed external hexagonal positioning screws, and each external hexagonal positioning screw is threadedly connected to the inside of the expansion sleeve fixing ring and the expansion sleeve pressure ring.
[0008] Furthermore, an O-ring 1 is embedded in the outer wall of the inner sleeve, and an O-ring 7 is embedded in the inner wall of the inner sleeve.
[0009] Furthermore, the inner wall surface of the shaft sleeve is embedded with an O-ring 2, and the inner wall surface of the positioning ring is embedded with an O-ring 4.
[0010] Furthermore, the outer part of the positioning ring is sleeved with an O-ring five, the outer end of the shaft sleeve away from the positioning ring is sleeved with an O-ring five, and the outer parts of the two stationary rings are sleeved with O-ring six respectively.
[0011] Furthermore, a spring is sleeved on the outside of each of the cylindrical pins, and the spring is made of Hastelloy C276.
[0012] The beneficial effects of the utility model are as follows:
[0013] 1. The utility model adopts a containerized mechanical seal to replace packing and component seals, which is easy to install and repair, and the sleeve will not wear during operation; it adopts double-end seal and Plan54 flushing scheme, uses pure water as the circulating isolation liquid, makes the isolation liquid pressure greater than the medium side pressure, and realizes that the sealing ring surface liquid film is provided by pure isolation liquid instead of mud medium, which can prevent the friction surface from being worn out by mud particles and fail, and prevent the medium from leaking to the atmosphere end and causing environmental pollution, and can also effectively take away the heat of the friction pair, so that the seal cools down, thereby improving the seal life; the mechanical seal friction surface should adopt a double balance design, which can withstand the two-way pressure on the medium side and the isolation side, effectively resist pressure fluctuations, and prevent the ring surface from opening due to pressure fluctuations, so that the mud will not pollute the isolation cavity; The mechanical seal adopts a back-to-back structure and increases the inner diameter of the friction pair to make the isolation chamber space large enough, which is conducive to the isolation fluid to wash away the possible particle accumulation on the back of the friction pair; the mechanical seal friction pair uses silicon carbide to silicon carbide, which has a low friction coefficient and high hardness, and is very suitable for use in mud conditions; each sealing ring is driven by four pins or bosses, which is reliable and can effectively prevent stress concentration from damaging the silicon carbide sealing ring; compared with packing, the leakage is reduced, the shaft or sleeve has no wear, and water resources are saved. Compared with the existing component seal, the double balance design is resistant to pressure fluctuations and the mechanical seal has a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1It is a cross-sectional view of the internal structure of the utility model;
[0015] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;
[0016] Figure 3 This utility model Figure 2 The enlarged view of point A in the middle;
[0017] Figure 4 It is a side view of the three-dimensional structure of the utility model;
[0018] : Reference numerals: 1. sleeve; 2. locating ring; 3. inner sleeve; 4. gland; 5. stationary ring; 6. inlaid assembly; 7. inner ring of expansion sleeve; 8. fixing ring of expansion sleeve; 9. pressure ring of expansion sleeve; 10. O-ring one; 11. O-ring two; 12. O-ring three; 13. O-ring four; 14. cylindrical pin one; 15. cylindrical pin two; 16. O-ring five; 17. O-ring six; 18. locating block; 19. locating screw one; 20. locating screw two; 21. hexagonal locating screw; 22. spring; 23. O-ring seven. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Generally, the components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0021] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0022] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0023] like Figures 1 to 4As shown, a new type of double-end face cartridge mechanical seal for mud pumps includes a sleeve 1, a positioning ring 2 is sleeved on the outside of the sleeve 1, an inner sleeve 3 is inserted at the end of the sleeve 1 away from the positioning ring 2, two static rings 5 are sleeved on the outside of the sleeve 1, and a gland 4 is sleeved on the outside of the two static rings 5. The outside of the sleeve 1 is located on both sides of the gland 4 and is respectively sleeved with an inlay component 6. An O-ring 3 12 is inlaid and installed on one side of the gland 4 close to the inner sleeve 3. Four plug-in cylindrical pins 14 are evenly distributed on the side of the positioning ring 2 close to the gland 4. Four plug-in cylindrical pins 14 are evenly distributed on the outer wall of the sleeve 1. The middle of the two static rings 5 is evenly spaced. There are four plug-in cylindrical pins 15, and four clamping positioning blocks 18 are evenly distributed on the side of the gland 4 away from the inner sleeve 3. Each positioning block 18 is threadedly connected with a positioning screw 19 at one end away from the gland 4. The bottom end of each positioning screw 19 is threadedly connected to the inside of the positioning ring 2. The inside of the positioning ring 2 is provided with a positioning screw 20 corresponding to the bottom end of each positioning screw 19. The bottom end of each positioning screw 20 is threadedly connected to the inside of the sleeve 1. It should be noted that a container-type mechanical seal is used instead of a packing and a component-type seal, which is easy to install and maintain, and the sleeve 1 will not wear during operation; a double-end seal and P l are used The an54 flushing solution uses pure water as the circulating isolation fluid, making the isolation fluid pressure greater than the medium side pressure, so that the sealing ring surface liquid film is provided by pure isolation fluid instead of mud medium, which can prevent the friction surface from being worn out by mud particles and causing failure, and prevent the medium from leaking to the atmosphere and causing environmental pollution. It can also effectively take away the heat of the friction pair and cool the seal, thereby increasing the seal life; the mechanical seal friction surface should adopt a double balance design, which can withstand the two-way pressure on the medium side and the isolation side, effectively resist pressure fluctuations, and prevent the ring surface from opening due to pressure fluctuations, causing mud to pollute the isolation cavity; The mechanical seal adopts a back-to-back structure and increases the inner diameter of the friction pair so that the isolation chamber space is large enough, which is conducive to the isolation fluid to wash away the possible particle accumulation on the back of the friction pair; the mechanical seal friction pair uses silicon carbide to silicon carbide, which has a low friction coefficient and high hardness and is very suitable for use in mud conditions; each sealing ring is driven by four pins or bosses, which is reliable and can effectively prevent stress concentration from damaging the silicon carbide sealing ring; compared with packing, the leakage is reduced, the shaft or sleeve 1 has no wear, and water resources are saved. Compared with the existing component seal, the double balance design is resistant to pressure fluctuations and the mechanical seal has a longer service life.
[0024] like Figures 1 to 4As shown, an expansion sleeve inner ring 7 is sleeved on the end of the outer part of the sleeve 1 away from the inner sleeve 3, an expansion sleeve fixing ring 8 is sleeved on the end of the outer part of the expansion sleeve inner ring 7 close to the inner sleeve 3, and an expansion sleeve pressure ring 9 is sleeved on the end of the outer part of the expansion sleeve inner ring 7 away from the inner sleeve 3. The expansion sleeve fixing ring 8 and the expansion sleeve pressure ring 9 are connected by a number of evenly distributed external hexagonal positioning screws 21, and each external hexagonal positioning screw 21 is threadedly connected to the inside of the expansion sleeve fixing ring 8 and the expansion sleeve pressure ring 9. It should be noted that the expansion sleeve structure is adopted instead of the traditional set screw structure, so that the sleeve 1 can be tightly clamped on the shaft to achieve effective transmission and positioning.
[0025] like Figures 1 to 4 As shown, the outer wall of the inner sleeve 3 is embedded with an O-ring 10, and the inner wall of the inner sleeve 3 is embedded with an O-ring 7 23. It should be noted that the O-ring 10 and the O-ring 7 23 cooperate with each other to enhance the sealing effect of the inner sleeve 3.
[0026] like Figures 1 to 4 As shown, the inner wall of the sleeve 1 is embedded with an O-ring 2 11, and the inner wall of the positioning ring 2 is embedded with an O-ring 4 13. It should be noted that the O-ring 2 11 and the O-ring 4 13 cooperate with each other to further enhance the sealing effect between the sleeve 1 and the inner sleeve 3 and between the sleeve 1 and the positioning ring 2.
[0027] like Figures 1 to 4 As shown, the outer part of the locating ring 2 is sleeved with an O-ring 5 16, the outer end of the sleeve 1 away from the locating ring 2 is sleeved with an O-ring 5 16, and the outer parts of the two stationary rings 5 are respectively sleeved with O-rings 6 17. It should be noted that the O-ring 5 16 is mainly used to strengthen the sealing effect between the two embedded components 6 and the sleeve 1 and the locating ring 2 respectively, and the O-ring 6 17 is mainly used to strengthen the sealing effect between the pressure cover 4 and the two stationary rings 5.
[0028] like Figures 1 to 4 As shown, each cylindrical pin 14 is sleeved with a spring 22 on the outside. The spring 22 is made of Hastelloy C276. It should be noted that a multi-spring structure is used and is placed in an isolation chamber without contact with the mud medium. Due to the large isolation chamber, the isolation liquid can quickly clean the spring 22. The spring 22 is made of Hastelloy C276 to ensure its fatigue strength and increase the service life of the mechanical seal.
[0029] In summary:
[0030] The containerized mechanical seal is used to replace the packing and component seal, which is easy to install and repair, and the sleeve 1 will not wear during operation; the double-end seal and Plan54 flushing scheme are used, and pure water is used as the circulating isolation liquid, so that the isolation liquid pressure is greater than the medium side pressure, and the sealing ring surface liquid film is provided by the pure isolation liquid instead of the mud medium, which can prevent the friction surface from being worn out by mud particles and fail, and prevent the medium from leaking to the atmosphere and causing environmental pollution, and can also effectively take away the heat of the friction pair, so that the seal cools down, thereby increasing the seal life; the mechanical seal friction surface should adopt a double balance design, which can withstand the two-way pressure on the medium side and the isolation side, effectively resist pressure fluctuations, and prevent the ring surface from opening due to pressure fluctuations, so that the mud will not pollute the isolation cavity; The mechanical seal adopts a back-to-back structure and increases the inner diameter of the friction pair so that the isolation chamber space is large enough, which is conducive to the isolation fluid to wash away the possible particle accumulation on the back of the friction pair; the mechanical seal friction pair uses silicon carbide to silicon carbide, which has a low friction coefficient and high hardness and is very suitable for use in mud conditions; each sealing ring is driven by four pins or bosses, which is reliable and can effectively prevent stress concentration from damaging the silicon carbide sealing ring; compared with packing, the leakage is reduced, the shaft or sleeve 1 has no wear, and water resources are saved. Compared with the existing component seal, the double balance design is resistant to pressure fluctuations and the mechanical seal has a longer service life.
[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A new type of double-end cartridge mechanical seal for mud pumps, characterized in that: The invention comprises a shaft sleeve (1), wherein a positioning ring (2) is sleeved on the outside of the shaft sleeve (1), an inner shaft sleeve (3) is inserted at one end of the shaft sleeve (1) away from the positioning ring (2), two stationary rings (5) are sleeved on the outside of the two stationary rings (5), a pressure cover (4) is sleeved on the outside of the shaft sleeve (1), an inlay component (6) is sleeved on both sides of the pressure cover (4), an O-ring three (12) is inlaid and installed on one side of the pressure cover (4) close to the inner shaft sleeve (3), four plug-in cylindrical pins one (14) are evenly distributed on one side of the positioning ring (2) close to the pressure cover (4), and four outer wall surfaces of the shaft sleeve (1) are evenly distributed. A plug-in cylindrical pin one (14), four plug-in cylindrical pins two (15) are evenly distributed between the two stationary rings (5), four clamping positioning blocks (18) are evenly distributed on the side of the gland (4) away from the inner sleeve (3), and one end of each positioning block (18) away from the gland (4) is threadedly connected to a positioning screw one (19), and the bottom end of each positioning screw one (19) is threadedly connected to the inside of the positioning ring (2), and a positioning screw two (20) is arranged inside the positioning ring (2) corresponding to the bottom end of each positioning screw one (19), and the bottom end of each positioning screw two (20) is threadedly connected to the inside of the sleeve (1).
2. According to claim 1, a new type of double-end cartridge mechanical seal for mud pumps is characterized in that: An expansion sleeve inner ring (7) is sleeved on the end of the outer side of the sleeve (1) away from the inner sleeve (3), an expansion sleeve fixing ring (8) is sleeved on the end of the outer side of the expansion sleeve inner ring (7) close to the inner sleeve (3), and an expansion sleeve pressure ring (9) is sleeved on the end of the outer side of the expansion sleeve inner ring (7) away from the inner sleeve (3). The expansion sleeve fixing ring (8) and the expansion sleeve pressure ring (9) are connected by a plurality of evenly distributed external hexagonal positioning screws (21), and each external hexagonal positioning screw (21) is threadedly connected to the inside of the expansion sleeve fixing ring (8) and the expansion sleeve pressure ring (9).
3. According to claim 1, a new type of double-end cartridge mechanical seal for mud pumps is characterized in that: The outer wall of the inner shaft sleeve (3) is embedded with an O-ring 1 (10), and the inner wall of the inner shaft sleeve (3) is embedded with an O-ring 7 (23).
4. According to claim 1, a new type of double-end cartridge mechanical seal for mud pumps is characterized in that: The inner wall surface of the shaft sleeve (1) is embedded with an O-ring 2 (11), and the inner wall surface of the positioning ring (2) is embedded with an O-ring 4 (13).
5. According to claim 1, a novel double-end cartridge mechanical seal for a mud pump is characterized in that: The outer part of the positioning ring (2) is sleeved with an O-ring five (16), the outer end of the shaft sleeve (1) away from the positioning ring (2) is sleeved with an O-ring five (16), and the outer parts of the two stationary rings (5) are respectively sleeved with O-ring six (17).
6. A novel double-end cartridge mechanical seal for a mud pump according to claim 1, characterized in that: The outside of each cylindrical pin (14) is sleeved with a spring (22), and the spring (22) is made of Hastelloy C276 material.