CN204755914U - Medium speed pulverizer pull rod sealing device - Google Patents
Medium speed pulverizer pull rod sealing device Download PDFInfo
- Publication number
- CN204755914U CN204755914U CN201520349512.9U CN201520349512U CN204755914U CN 204755914 U CN204755914 U CN 204755914U CN 201520349512 U CN201520349512 U CN 201520349512U CN 204755914 U CN204755914 U CN 204755914U
- Authority
- CN
- China
- Prior art keywords
- cast iron
- pull rod
- pull bar
- seal
- speed pulverizer
- 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.)
- Expired - Fee Related
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- Crushing And Grinding (AREA)
Abstract
The utility model discloses a medium speed pulverizer pull rod sealing device belongs to thermal power coal -grinding equipment technical field. This sealing device includes the upper seal body, the upper seal body including the cast iron shell, the cast iron shell on be provided with vestibule in circular, circular mesopore intracavity is provided with the rubber circle, the internal diameter of rubber circle is greater than the diameter of pull rod, is connected with the fender skirt on the top pull rod of the upper seal body, the fender skirt be loudspeaker forms to the under shed, cast iron shell surface be the toper, the lower limb that keeps off the skirt is located below the last outside of surface of cast iron shell. This device is used and can prolong sealed life on the upper seal of medium speed pulverizer pull rod, avoids the coal pulverizer to leak the emergence of powder phenomenon.
Description
Technical field
The utility model relates to a kind of medium-speed pulverizer seal arrangement, particularly a kind of medium-speed pulverizer pull rod seal device, belongs to thermal power generation coal-grinding equipment technical field.
Background technique
Medium-speed pulverizer is the nucleus equipment of current thermal power plant coal-grinding, coal pulverizer is provided with bottom and is connected to pull bar in hydraulic system, pull bar is upward through housing and is connected to part tripod becoming deceleration loading device, coal pulverizer adopts sealing air to seal, it is the basis preventing coal dust from leaking in the sealing that pull bar place is good, the principle of tie-rod sealing controls wind powder by the pressure reduction of sealing air and First air to leak, in the process of coal-grinding, namely pull bar has axial motion, there is again the movement of substantially horizontal, in order to realize good tie-rod sealing, general slip on pull bar arranges seal and lower seal, upper seal and lower seal are two ironwares freely placed through pull bar, self gravitation is relied on to block the gap that pull bar passes shell place and bottom place, sealing air chamber, horizontal motion can be made with pull bar, but seal does not allow there is displacement in the vertical direction, once the situation having above-below direction to move inclusion particles will to occur and drop from gap, in general, 2mm gap is had between upper sealing and pull bar, sleeping in lower seal have packing, and it is very close to each other between pull bar, foreign material in coal pulverizer are very many, during the material of comparatively attaching most importance to when having iron filings, sillar etc., the gap be stuck between seal and pull bar can be entered, on driving when pull bar rises again, seal moves up and down together, make seal leave sealing surface, make the seal failure of system, occur to leak powder phenomenon, moreover the inner face of upper seal and pull bar are metal covering, larger pull bar wearing and tearing can be caused in the process used.
Summary of the invention
The purpose of this utility model is the above-mentioned technical problem overcome in coal grinding machine tie-rod sealing, provides a kind of medium-speed pulverizer pull rod seal device.
For realizing the purpose of this utility model, the technological scheme that the utility model adopts is: a kind of medium-speed pulverizer pull rod seal device, comprise seal, described upper seal comprises cast iron housing, described cast iron housing is provided with vestibule in circle, rubber ring is provided with in vestibule in circle, the internal diameter of rubber ring is greater than the diameter of pull bar, above upper seal, pull bar is connected with gear skirt, described gear skirt is horn-like under shed, described cast iron housing outer surface is taper, the lower limb of gear skirt is positioned at the outer side-lower of upper surface of cast iron housing, further, described gear skirt upper periphery is connected on retainer ring, described retainer ring is fixedly connected with or is bonded on pull bar, described gear skirt is flexible, further, described gear skirt following peripheral is equipped with pendant circle, described pendant loop diameter is between the maximum diameter and minimum diameter of taper cast iron housing.
Positive Advantageous Effects of the present utility model is: upper seal adopts shell to be cast iron, inside is rubber ring, can effectively protect pull bar not frayed, pull bar is fixedly connected with gear skirt, gear skirt does not affect the running degrees of freedom of pull bar, resistance is not produced to pull bar motion, but gear skirt can block the gap between pull bar and upper seal, make any foreign material cannot enter in this gap, the sealing reliability of seal is increased greatly, be flexible material due to gear skirt and be provided with pendant circle in bottom, any type of motion can be adapted to, the probability of seal failure on the utility model is adopted greatly to reduce, be conducive to realizing the good upper sealing of pull bar.This application of installation seals the working life that can extend sealing on medium-speed pulverizer pull bar, avoids coal pulverizer to leak the generation of powder phenomenon.
Accompanying drawing explanation
Fig. 1 is vertical section schematic diagram of the present utility model.
Embodiment
In order to explain enforcement of the present utility model more fully, provide embodiment of the present utility model.These embodiments are only to elaboration of the present utility model, do not limit scope of the present utility model.
By reference to the accompanying drawings elaboration detailed is further done to the utility model, be respectively labeled as in accompanying drawing: 1: pull bar; 2: retainer ring; 3: gear skirt; 4: pendant circle; 5: cast iron housing; 6: rubber ring; 7: base.The utility model is the improvement carried out the upper seal in tie-rod sealing, as shown in drawings, in a kind of medium-speed pulverizer pull rod seal device, comprise seal, upper seal comprises cast iron housing 5, cast iron housing 5 is provided with vestibule in circle, rubber ring 6 is provided with in vestibule in circle, the internal diameter of rubber ring 6 is greater than the diameter of pull bar, the diameter difference of rubber ring and pull bar should ensure that gap is between the two at about 2mm, pull bar is connected with gear skirt 3 above upper seal, the upper periphery of gear skirt 3 is connected on retainer ring 2, retainer ring 2 is fixedly connected with or is bonded on pull bar 1, gear skirt 3 is horn-like under shed, cast iron housing 5 outer surface is taper, the lower limb of gear skirt 3 is positioned at the outer side-lower of upper surface of cast iron housing 5, gear skirt adopts flexible material to make, adopt high-abrasive material better, pendant circle 4 is equipped with in gear skirt following peripheral, the diameter of pendant circle 4 is between the maximum diameter and minimum diameter of taper cast iron housing.The lower seal be equipped with this device can adopt packing_seal, considers that packing is wear-resisting but deformability is bad, can consider to adopt packing and rubber mutually to make up formation lower seal in radial direction.This device does not have any impact to the motion of pull bar as upper seal, upper seal adopts shell to be cast iron, inside is rubber ring, can effectively protect pull bar not frayed in motion, pull bar is fixedly connected with gear skirt, gear skirt does not affect the running degrees of freedom of pull bar, resistance is not produced to pull bar motion, but gear skirt can block the gap between pull bar and upper seal, make any foreign material cannot enter in this gap, the sealing reliability of seal is increased greatly, be flexible material due to gear skirt and be provided with pendant circle in bottom, any type of motion can be adapted to, the probability of seal failure on the utility model is adopted greatly to reduce, be conducive to realizing the good upper sealing of pull bar.
After detailed description mode of execution of the present utility model, the personage being familiar with this technology can be well understood to, do not departing under above-mentioned claim and spirit and can carry out various change and amendment, all above embodiment is done according to technical spirit of the present utility model any simple modification, equivalent variations and modification, all belong to the scope of technical solutions of the utility model, and the utility model is not also limited to the mode of execution of example in specification.
Claims (3)
1. a medium-speed pulverizer pull rod seal device, comprise seal, it is characterized in that: described upper seal comprises cast iron housing, described cast iron housing is provided with vestibule in circle, is provided with rubber ring in circle in vestibule, the internal diameter of rubber ring is greater than the diameter of pull bar, above upper seal, pull bar is connected with gear skirt, described gear skirt is horn-like under shed, and described cast iron housing outer surface is taper, and the lower limb of gear skirt is positioned at the outer side-lower of upper surface of cast iron housing.
2. a kind of medium-speed pulverizer pull rod seal device according to claim 1, is characterized in that: described gear skirt upper periphery is connected on retainer ring, and described retainer ring is fixedly connected with or is bonded on pull bar, and described gear skirt is flexible.
3. a kind of medium-speed pulverizer pull rod seal device according to claim 1, is characterized in that: described gear skirt following peripheral is equipped with pendant circle, and described pendant loop diameter is between the maximum diameter and minimum diameter of taper cast iron housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520349512.9U CN204755914U (en) | 2015-05-27 | 2015-05-27 | Medium speed pulverizer pull rod sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520349512.9U CN204755914U (en) | 2015-05-27 | 2015-05-27 | Medium speed pulverizer pull rod sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204755914U true CN204755914U (en) | 2015-11-11 |
Family
ID=54470622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520349512.9U Expired - Fee Related CN204755914U (en) | 2015-05-27 | 2015-05-27 | Medium speed pulverizer pull rod sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204755914U (en) |
-
2015
- 2015-05-27 CN CN201520349512.9U patent/CN204755914U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151111 Termination date: 20180527 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |