CN108533378B - novel mechanical seal structure of cooling water pump of diesel locomotive - Google Patents
novel mechanical seal structure of cooling water pump of diesel locomotive Download PDFInfo
- Publication number
- CN108533378B CN108533378B CN201810320638.1A CN201810320638A CN108533378B CN 108533378 B CN108533378 B CN 108533378B CN 201810320638 A CN201810320638 A CN 201810320638A CN 108533378 B CN108533378 B CN 108533378B
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- China
- Prior art keywords
- sealing ring
- sealed
- water pump
- shaft
- movable sealing
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/06—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a novel mechanical sealing structure of a cooling water pump of an internal combustion locomotive.A straight port platform on the inner side of an impeller is fixedly connected with the large end of a tower spring, the small end of the tower spring is fixedly connected with one side of a convex pushing frame, the outer diameter of the other side of the convex pushing frame is provided with two bosses in the axial direction, the two bosses are clamped in a straight groove of the outer diameter of a movable sealing ring, a concave shaft seal is arranged between the convex pushing frame and the movable sealing ring, the concave shaft seal is sealed with the movable sealing ring, the surface between the grinding surface of the movable sealing ring and the bottom surface of a fixed sealing ring is sealed, the bottom surface of the fixed sealing ring is sealed with a pump body, the movable sealing ring is sealed with. The invention has simple structure, good processing economy and high sealing performance, can be used for a long time in high-temperature, high-pressure and acid-alkali water quality environments, greatly reduces the water leakage frequency of the water pump applied to ships or plateau internal combustion locomotives, and prolongs the service life and the maintenance period of the engines of the ships or plateau internal combustion locomotives.
Description
Technical Field
The invention relates to the technical field of mechanical seal, in particular to a novel mechanical seal structure of a cooling water pump of an internal combustion locomotive.
Background
Whether on ships traveling in the vast sea or on diesel locomotives rushing at the vast, at the very least, the power source is the engine. When the engine burns fuel, the temperature of the engine body is continuously raised, and particularly when a ship runs against the wind and against the waves and an internal combustion locomotive climbs a slope, the engine needs to rotate at a high speed, so that the generated heat is higher. If the temperature of the engine is allowed to drop or the engine is kept at a constant temperature, heat is only transferred out by air cooling and water cooling methods. The air cooling is realized by exhausting air for heat dissipation, and the water cooling is realized by water pump cold and hot circulation for heat dissipation. The water pump is required to continuously and circularly work, so that the mechanical performance of the water pump is required to be small in vibration and low in noise. The sealing properties must ensure that water, gas, etc. are not allowed to leak for a long time. The water circulating pump is continuously researched and explored by domestic and foreign industry people for many years, a complete structural system is basically formed, but the problem of water leakage of the water pump is not effectively solved, and the water circulating pump has no great breakthrough particularly to a high-power diesel locomotive, even causes difficulty in maintenance, and causes the locomotive to be stopped.
Disclosure of Invention
The invention aims to solve the problems and provides a novel mechanical seal structure of a cooling water pump of an internal combustion locomotive, which ensures that the water pump does not leak water frequently in the use process, increases the sealing property of a water seal and prolongs the service life.
In order to solve the technical problems, the technical scheme of the invention is as follows: the novel mechanical seal structure of the cooling water pump of the diesel locomotive comprises a concave shaft seal, a convex pushing frame, a movable seal ring, a fixed seal ring and a pump body, wherein a shaft is installed in the pump body, an impeller is installed at the end part of the shaft, a straight opening platform in the impeller is fixedly connected with the large end of a tower spring, and the small end of the tower spring is fixedly connected with one side of the convex pushing frame. The tower spring is adopted because of the good stability of the tower spring. The outer diameter of the other side of the convex pushing frame is provided with two bosses in the axial direction, the two bosses are clamped in the outer diameter straight groove of the movable sealing ring, and the concave shaft seal is arranged between the convex pushing frame and the movable sealing ring. The concave shaft seal is sleeved on the shaft and is made of rubber material and forms surface seal with the shaft through the extrusion of the tower spring. The surface of the concave shaft seal, which is contacted with the movable sealing ring, is provided with a sealing line to ensure that surface sealing is formed between the concave shaft seal and the movable sealing ring. The grinding surface of the dynamic seal ring and the fixed seal ring form surface seal due to the extrusion of the tower spring, so that the dynamic seal ring is ensured not to have the leakage problem. The inner diameter of the movable sealing ring is provided with a sealing groove and is provided with an upper line sealing ring, and the movable sealing ring and the shaft form line sealing due to the extrusion of radial force. The linear sealing ring and the concave shaft seal form double sealing, and the stability is better.
The fixed sealing ring is flange-shaped and is fixed on the pump body through a self-locking bolt, and the bottom surface of the fixed sealing ring and the pump body are sealed through silica gel.
Furthermore, the material of the fixed sealing ring is high-nickel nodular cast alloy.
Furthermore, the dynamic seal ring is made of graphite alloy.
furthermore, the concave shaft seal is made of rubber.
The invention has simple structure, good processing economy and high sealing performance, can be used for a long time in high-temperature, high-pressure and acid-alkali water quality environments, greatly reduces the water leakage frequency of the water pump applied to ships or plateau internal combustion locomotives, and prolongs the service life and the maintenance period of the engines of the ships or plateau internal combustion locomotives.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a stationary seal ring;
FIG. 3 is a schematic structural diagram of a dynamic seal ring;
Fig. 4 is a sectional view of the dynamic seal ring.
Wherein: 1. the device comprises a fixed sealing ring, 2 a movable sealing ring, 3 a concave shaft seal, 4 a convex pushing frame, 5 a tower spring, 6 an impeller, 7 a linear sealing ring, 8 a pump body, 9 and a shaft.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings 1 to 4.
The novel mechanical seal structure of the cooling water pump of the diesel locomotive comprises an impeller 6, a pump body 8 and a shaft 9, wherein the shaft 9 is installed in the pump body 8, the impeller 6 is installed at the end part of the shaft 9, because the stability of a tower spring is good, the tower spring is adopted, a straight port platform at the inner side of the impeller 6 is fixedly connected with the large end of the tower spring 5, the small end of the tower spring 5 is fixedly connected with one side of a convex pushing frame 4, the outer diameter of the other side of the convex pushing frame 4 is provided with two bosses in the axial direction, the two bosses are clamped in a straight groove at the outer diameter of a dynamic seal ring 2, a concave shaft seal 3 is installed between the convex pushing frame 4 and the dynamic seal ring 2, the concave shaft seal 3 and the dynamic seal ring 2 are sealed through a seal line processed by the concave shaft seal 3, when the tower spring 5 is compressed, the stress point and the stress surface of the dynamic seal ring 2 are all in the tower spring 5 ring, and, the fixed seal ring 1 is fixed on the pump body 8 through a self-locking bolt, the bottom surface of the fixed seal ring 1 and the pump body 8 are sealed through silica gel, the fixed seal ring 1, the movable seal ring 2 and the concave shaft seal 3 are all sleeved on the shaft 9, the movable seal ring 2 and the shaft 9 are sealed through a line seal ring 7, and the concave shaft seal 3 and the shaft 9 are sealed at the upper surface; the material of the fixed seal ring 1 is high nickel ball ink casting alloy, the material of the movable seal ring 2 is graphite alloy, and the material of the concave shaft seal 3 is rubber.
The fixed sealing ring 1 is made into a flange type, so that the purpose is that the large end of the tower spring 5 is compressed into the pump body 8, a certain space needs to be occupied, more importantly, water flowing from the space between the impeller 6 and the pump body 8 forms a water film on the surface of the movable sealing ring 2 under the action of centrifugal force, the water film flows out uniformly and smoothly, and resistance cannot be formed on the drainage of the impeller 6 to influence the drainage. Experiments prove that compared with the common traditional straight fixed sealing ring, the flange type fixed sealing ring 1 has the advantage that the water discharge of the water pump 8 is 20m3/h larger. The output power of the motor is effectively converted into useful work. The flange-type stationary seal ring 1 is fixed to the pump body 8. When the sealing device works, the movable sealing ring 2 and the fixed sealing ring 1 rotate relatively at the joint surface.
A sealing groove is designed on the inner diameter of the movable sealing ring 2, and an upper sealing ring 7 is arranged to form double sealing, so that no water leakage on the shaft diameter can be completely ensured. Through repeated tests, the fixed sealing ring 1 is made of a high-nickel nodular cast alloy material, and the movable sealing ring 2 is made of a graphite alloy material. Preparing a heat treatment process and a mechanical processing process: firstly, the pump body 8 is processed, then the joint surface of the fixed seal ring 1 and the pump body 8 is processed, then the grinding surface of the fixed seal ring 1 is superfinished by taking the joint surface as a reference, and form and position tolerance and surface finish are strictly ensured. When the fixed seal ring 1 is installed, the joint surface of the fixed seal ring 1 and the pump body 8 is sealed by high-temperature-resistant and corrosion-resistant silicon rubber and is pressed tightly by bolts. As mentioned above, the combined surface of the stationary seal ring 1 is superfinished, and the ground surface of the movable seal ring 2 is ground by the superfinished surface. The dynamic seal ring 2 is made of graphite alloy materials, has good hardness, good wear resistance and plasticity and good toughness, and the graphite dynamic seal ring 2 is extruded by the tower spring 5 to seal the space between the dynamic seal ring 2 and the fixed seal ring 1.
The materials are moderate in price, good in stability and wear-resistant, and are the first initiative in the industry. Can replace imported materials, and practice proves that the dynamic sealing ring 2 and the fixed sealing ring 1 can be continuously used for more than 3-5 years under severe environment. Effectively solving the problem of water leakage of the cooling circulating water pump.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (6)
1. The novel mechanical seal structure of the cooling water pump of the diesel locomotive comprises an impeller (6), a pump body (8) and a shaft (9), wherein the shaft (9) is installed in the pump body (8), the impeller (6) is installed at the end part of the shaft (9), and is characterized in that an inner side straight port platform of the impeller (6) is fixedly connected with the large end of a tower spring (5), the small end of the tower spring (5) is fixedly connected with one side of a convex pushing frame (4), the outer diameter of the other side of the convex pushing frame (4) is provided with two bosses in the axial direction, the two bosses are clamped in an outer diameter straight groove of a movable sealing ring (2), a concave shaft seal (3) is installed between the convex pushing frame (4) and the movable sealing ring (2), the concave shaft seal (3) is sealed with the movable sealing ring (2), the surface between the grinding surface of the movable sealing ring (2) and the bottom surface of a fixed sealing ring (1) is sealed, the bottom surface of the fixed sealing ring (1) is sealed with the pump body (8), the fixed sealing ring (1), the movable sealing ring (2) and the concave shaft seal (3) are all sleeved on the shaft (9), the movable sealing ring (2) and the shaft (9) are sealed through the line sealing ring (7), and the surface between the concave shaft seal (3) and the shaft (9) is sealed.
2. The novel mechanical seal structure of the diesel locomotive cooling water pump according to claim 1, characterized in that the material of the fixed seal ring (1) is high-nickel nodular cast alloy.
3. The novel mechanical seal structure of the diesel locomotive cooling water pump according to claim 1, characterized in that the dynamic seal ring (2) is made of graphite alloy.
4. The novel mechanical seal structure of the diesel locomotive cooling water pump according to claim 1, characterized in that the concave shaft seal (3) is made of rubber.
5. The novel mechanical seal structure of the diesel locomotive cooling water pump is characterized in that the fixed seal ring (1) is fixed on the pump body (8) through a self-locking bolt.
6. The novel mechanical seal structure of the diesel locomotive cooling water pump is characterized in that the bottom surface of the fixed seal ring (1) is sealed with the pump body (8) through silica gel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810320638.1A CN108533378B (en) | 2018-04-08 | 2018-04-08 | novel mechanical seal structure of cooling water pump of diesel locomotive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810320638.1A CN108533378B (en) | 2018-04-08 | 2018-04-08 | novel mechanical seal structure of cooling water pump of diesel locomotive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108533378A CN108533378A (en) | 2018-09-14 |
| CN108533378B true CN108533378B (en) | 2019-12-17 |
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ID=63479728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810320638.1A Active CN108533378B (en) | 2018-04-08 | 2018-04-08 | novel mechanical seal structure of cooling water pump of diesel locomotive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108533378B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008115730A1 (en) * | 2007-03-16 | 2008-09-25 | Vrc, Inc. | Centrifugal water pump |
| CN204082638U (en) * | 2014-09-01 | 2015-01-07 | 浙江维新汽车配件有限公司 | The water pump of good seal performance |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6929449B2 (en) * | 2003-04-25 | 2005-08-16 | Electro-Motive Diesel, Inc. | Diesel engine water pump with improved oil control |
| US6918746B2 (en) * | 2003-04-25 | 2005-07-19 | Electro-Motive Diesel, Inc. | Diesel engine water pump with thrust bearing preload |
-
2018
- 2018-04-08 CN CN201810320638.1A patent/CN108533378B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008115730A1 (en) * | 2007-03-16 | 2008-09-25 | Vrc, Inc. | Centrifugal water pump |
| CN204082638U (en) * | 2014-09-01 | 2015-01-07 | 浙江维新汽车配件有限公司 | The water pump of good seal performance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108533378A (en) | 2018-09-14 |
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