CN202659898U - Pull rod sealing device of vertical medium speed coal mill - Google Patents
Pull rod sealing device of vertical medium speed coal mill Download PDFInfo
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- CN202659898U CN202659898U CN 201220333507 CN201220333507U CN202659898U CN 202659898 U CN202659898 U CN 202659898U CN 201220333507 CN201220333507 CN 201220333507 CN 201220333507 U CN201220333507 U CN 201220333507U CN 202659898 U CN202659898 U CN 202659898U
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- seal
- sealing
- pull rod
- pull bar
- sleeve
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Abstract
The utility model relates to a mechanical sealing device, in particular to a pull rod sealing device of a vertical medium speed coal mill, which comprises an upper seal and a lower seat which surround a pull rod, wherein the upper seal comprises an upper sealing rubber sleeve enclasped with the pull rod and a movable sealing ring synchronously moving together with the pull rod in the radial direction. Another sealing device also comprises an upper sealing sleeve, wherein the movable sealing ring is limited by an upper sealing pressing ring, and the upper sealing pressing ring is fixedly connected with a housing through a bolt. The lower seal comprises a lower sealing rubber sleeve enclasped with the pull rod, a lower sealing sleeve and a lower sealing flange, after the lower sealing sleeve is fixed on the housing, the lower sealing rubber sleeve is pressed in the lower sealing sleeve, and is pressed by the lower sealing flange; and the upper seal, the lower seal and the housing form a sealing cavity, and sealing air is introduced into the cavity to form a sealing air cavity. The pull rod sealing device has no abrasion to the pull rod, has a simple structure, is convenient for disassembly, and can play a role in effectively sealing.
Description
Technical field
The utility model relates to a kind of mechanical seal device, particularly a kind of vertical middle-speed coal-grinding machine pull rod seal device.
Background technique
Vertical middle-speed coal-grinding machine is pulverized coal preparation equipment important in thermal power plant, the cement plant, and the coal grinding machine tie-rod device is that loading force is sent to vitals on the grinding roller.Pull bar existingly moved up and down and horizontal jitter is arranged in when work, and sealing is difficulty comparatively.
Existing vertical middle-speed coal-grinding machine pull rod seal device mainly contains two kinds of structures (as depicted in figs. 1 and 2).
Pull rod seal device structure shown in Figure 1 is divided into top seal and lower seal two-part.Top seal adopts the slip annulus to cooperate with pull bar, and pull bar moves in the slip annulus.Because slip annulus and pull bar are all steel, all easily wearing and tearing of slip annulus and pull bar in the movement process; And the upper surface of top seal is the plane, piles up easily the foreign material such as rubble, broken coal, slug, has aggravated the wearing and tearing of pull bar and slip annulus, causes axially and the increasing of radial seal gap.The sealed core endoporus of its underpart sealing adopts packing to twine, and the easy extrusion of packing during the pull bar motion causes the gap to become large.The deadweight of lower seal core is bigger than normal, and very fast to the lower flange wearing and tearing, radial clearance is ground larger and larger.
Tie-rod sealing structure shown in Figure 2 is divided into top seal and lower seal two-part.The doublejointed bearing structure is adopted in top seal, and pull bar moves in the doublejointed brearing bore.On the one hand, pull bar and direct rigid contact of brearing bore, the wearing and tearing that especially produce when pull bar moves up and down progressively attenuate pull bar, cause pull bar and brearing bore gap to be strengthened.On the other hand, it is little that the doublejointed bearing seal structure causes pull bar to radially wobble amplitude, and restricted gender is large, is prone to other strength phenomenon, the one-sided wearing and tearing of pull bar strengthened form groove, carries easily foreign material secretly and enter, and then strengthen the pull bar wearing and tearing.Its underpart sealing is identical with the lower seal shortcoming of the first sealing configuration.
When coal pulverizer normally moved, the inner logical sealing air of pull rod seal device formed the sealing air cavity when sealing air pressure is higher than coal pulverizer internal pressure 2kPa, and it is external not leak into coal pulverizer with the wind powder mixture that guarantees coal pulverizer inside.
Because there is unreasonable factor in the design of original two kinds of seal arrangements, cause coal grinding machine tie-rod and sealed member to produce larger gap, the powder phenomenon of leaking out is serious, and befouling environment; On the other hand, more serious leakage can affect pulverizer capacity; Simultaneously pull bar is subject to heavy wear, and after diameter diminished, the pull bar fracture parking that causes the accident appearred in strength decreased easily.
Summary of the invention
The purpose of this utility model is to remedy the prior art deficiency, and a kind of favorable sealing property, easy-disassembling-assembling pull rod seal device are provided.
The utility model is achieved by the following technical solution:
A kind of vertical middle-speed coal-grinding machine pull rod seal device, comprise top seal and the lower seal of surrounding pull bar, it is characterized in that: described top seal comprises: the upper seal rubber sleeve of holding tightly with pull bar and the loose gland that radially is synchronized with the movement with pull bar, in some seal arrangement, as shown in Figure 4, also comprise the upper sleeve gasket cylinder; Described loose gland is spacing by upper seal joint; Described sealer comprises: lower seal gum cover, lower seal sleeve and the lower seal flange of holding pull bar tightly.
Described upper seal rubber sleeve and lower seal gum cover is characterized in that adopting special rubber type of material to make.
Described upper seal rubber sleeve is installed in the described loose gland, with the direct contact friction of pull bar.
Described loose gland is detachable structure, can carry out dismounting in coal pulverizer; Two-part of loose gland are combined into an annulus, are bolted, again the top of two sections described upper seal joints is inserted in the described loose gland lower recess, be combined into annular; Described loose gland and described upper seal joint consist of the radial seal form, and described loose gland swings with pull bar in the horizontal direction.
Described loose gland and described upper seal rubber sleeve combination are installed, and cone structure is formed on its top, can avoid foreign material to pile up.
Described lower seal sleeve is fixed on the casing, and lower seal gum cover cramping interior, is passed through the lower seal flange screw again.
After installing, described lower seal gum cover forms Elastic Contact, and can compensate for clearance.
The beneficial effects of the utility model are as follows: (one) good sealing effect: the rubber material Sealing is for the coal pulverizer internal condition is special, and is high temperature resistant, wear-resistant, toughness is strong.Rubber seal can realize that with pull bar gapless contacts, and is conducive to guarantee that sealing air pressure is higher than the setting value formation sealing air chamber of system pressure, reduces the leakage of wind powder, is conducive to keep the coal pulverizer environment of neat and tidy on every side.(2) rate of wear is slow: upper seal rubber sleeve and loose gland combination are installed, and cone structure is made at its top, has not only avoided material, the superincumbent accumulation of impurity, and the situation of avoiding it to cause wearing and tearing to accelerate.(3) to pull bar without wearing and tearing: rubber element directly contacts with the steel pull bar, and the pull bar wear extent reduces almost nil greatly, and pull bar prolongs working life, produces safer stablizing.(4) installation workload is little: each assembly of pull bar top seal is the split-type design, can carry out the replacing of rubber element in the situation of not dismantling pull bar.Only need open the lower seal flange when changing the lower seal gum cover and get final product, simple and practical, greatly improved working efficiency.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described further.
Accompanying drawing 1 is one of existing vertical middle-speed coal-grinding machine pull rod seal device structural representation;
Accompanying drawing 2 is one of existing vertical middle-speed coal-grinding machine pull rod seal device structural representation;
Among Fig. 1,1 pull bar, 12 casings, 13 sealing air cavitys seal slide block, 15 lower seal cores on 14;
Among Fig. 2,1 pull bar, 22 casings, 23 sealing air cavitys, 24 doublejointed bearing top seals, 25 lower seal cores;
Among Fig. 3,1 pull bar, seal rubber sleeve on 2,3 loose glands, seal joint on 5,6 lower seal gum covers, 7 lower seal sleeves, 8 lower seal flanges, 12 casings, 13 sealing air cavitys;
Among Fig. 4,1 pull bar, seal rubber sleeve on 2,3 loose glands, 4 upper sleeve gasket cylinders, seal joint on 5,6 lower seal gum covers, 7 lower seal sleeves, 8 lower seal flanges, 22 casings, 23 sealing air cavitys, 24 doublejointed bearing top seals.
Embodiment
The utility model is applied in the existing seal arrangement shown in Figure 1, and this example structure schematic representation is shown in Figure 3, and implementation is as follows:
(1), in coal pulverizer, the assemblys such as upper sealing slide block 14, lower seal core 15 and lower seal flange 8 that removal is shown in Figure 1 are in order to install all parts of the present utility model.
(2), top seal is installed: in coal pulverizer, upper seal rubber sleeve 2 is sleeved on the pull bar 1, two semi-rings with loose gland 3 are fitted on the seal rubber sleeve again, and loose gland 3 two-part are bolted composition one annulus; Secondly, be combined into annular in top insertion loose gland 3 lower recess with two sections upper seal joints 5; By bolt upper seal joint 5 is fixedly connected with casing 12 at last.
(3), lower seal is installed: outside coal pulverizer, at first lower seal sleeve 7 is directly connected to (but Site Welding) on the engine housing 12, then lower seal gum cover 6 covers are installed on the pull bar 1, again with lower seal gum cover 6 crampings in lower seal sleeve 7, by bolt lower seal flange 8 is fixedly connected with lower seal sleeve 7 at last.
The utility model is applied in the existing seal arrangement shown in Figure 2, and this example structure schematic representation is shown in Figure 4, and implementation is as follows:
(1), in coal pulverizer, doublejointed bearing top seal 24, lower seal core 25 and lower seal flange 8 that removal is shown in Figure 2.
(2), top seal is installed: at first, at the corresponding position of casing 22, install seal sleeve 4 by Site Welding; Again upper seal rubber sleeve 2 is sleeved on the pull bar 1; Then, two semi-rings of loose gland 3 are fitted on the seal rubber sleeve, and loose gland 3 two-part are bolted form an annulus; Secondly, be combined into annular in top insertion loose gland 3 lower recess with two sections upper seal joints 5; By bolt upper seal joint 5 is fixedly connected with upper sleeve gasket cylinder 4 at last.
(3), lower seal is installed: outside coal pulverizer, at first lower seal sleeve 7 is directly connected on the relevant position of casing 12 (but Site Welding), then lower seal gum cover 6 covers are installed on the pull bar 1, again with 8 extruding of lower seal flange, lower seal gum cover 6 crampings in lower seal sleeve 7, are fixedly connected with lower seal flange 8 by bolt at last with lower seal sleeve 7.
Above-mentioned two embodiments after top seal and the lower seal installation, form the tie-rod sealing chamber, and logical sealing air forms the sealing air cavity in the Seal cage.The sealing air cavity internal pressure is higher than coal pulverizer internal pressure 2KP and just forms effective sealing when above.Its advanced person's design and effectively solved by the black box that rubber type of material is made is revealed and because revealing the serious problems that may cause.
Claims (5)
1. a vertical middle-speed coal-grinding machine pull rod seal device comprises top seal and the lower seal of surrounding pull bar (1), it is characterized in that:
Described top seal comprises: the upper seal rubber sleeve (2) of holding tightly with pull bar (1) and the loose gland (3) that radially is synchronized with the movement with pull bar (1), and described loose gland (3) is spacing by upper seal joint (5);
Described lower seal comprises: lower seal gum cover (6), lower seal sleeve (7) and the lower seal flange (8) held tightly with pull bar (1).
2. vertical middle-speed coal-grinding machine pull rod seal device according to claim 1, it is characterized in that: described top seal also comprises upper sleeve gasket cylinder (4).
3. vertical middle-speed coal-grinding machine pull rod seal device according to claim 1 is characterized in that: described upper seal rubber sleeve (2) and lower seal gum cover (6), the making of employing rubber type of material.
4. vertical middle-speed coal-grinding machine pull rod seal device according to claim 1 is characterized in that:
Described loose gland (3) is detachable structure, can carry out dismounting in vertical middle-speed coal-grinding machine;
Two-part of described loose gland (3) are combined into an annulus, are bolted, again the top of two sections described upper seal joints (5) is inserted in described loose gland (3) lower recess, be combined into annular;
Described loose gland (3) consists of the radial seal form with described upper seal joint (5), and described loose gland (3) swings with pull bar in the horizontal direction.
5. vertical middle-speed coal-grinding machine pull rod seal device according to claim 1 is characterized in that: described loose gland (3) and described upper seal rubber sleeve (2) combination installation, its top formation cone structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220333507 CN202659898U (en) | 2012-07-11 | 2012-07-11 | Pull rod sealing device of vertical medium speed coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220333507 CN202659898U (en) | 2012-07-11 | 2012-07-11 | Pull rod sealing device of vertical medium speed coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202659898U true CN202659898U (en) | 2013-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220333507 Expired - Fee Related CN202659898U (en) | 2012-07-11 | 2012-07-11 | Pull rod sealing device of vertical medium speed coal mill |
Country Status (1)
| Country | Link |
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| CN (1) | CN202659898U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267127A (en) * | 2013-05-23 | 2013-08-28 | 郭瑜 | Pull rod sealing structure of load-variable coal mill |
| CN103322203A (en) * | 2013-07-09 | 2013-09-25 | 艾志（南京）环保管接技术股份有限公司 | Interference designed shaft rubber seal provided with fixing rings and helical teeth |
| CN106812949A (en) * | 2017-02-14 | 2017-06-09 | 陕西渤兴电力科技有限公司 | A kind of corrugated pull rod seal device of coal pulverizer |
| CN113958713A (en) * | 2021-10-29 | 2022-01-21 | 华能秦煤瑞金发电有限责任公司 | Hydraulic pull rod sealing device of medium-speed coal mill |
-
2012
- 2012-07-11 CN CN 201220333507 patent/CN202659898U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267127A (en) * | 2013-05-23 | 2013-08-28 | 郭瑜 | Pull rod sealing structure of load-variable coal mill |
| CN103322203A (en) * | 2013-07-09 | 2013-09-25 | 艾志（南京）环保管接技术股份有限公司 | Interference designed shaft rubber seal provided with fixing rings and helical teeth |
| CN106812949A (en) * | 2017-02-14 | 2017-06-09 | 陕西渤兴电力科技有限公司 | A kind of corrugated pull rod seal device of coal pulverizer |
| CN113958713A (en) * | 2021-10-29 | 2022-01-21 | 华能秦煤瑞金发电有限责任公司 | Hydraulic pull rod sealing device of medium-speed coal mill |
| CN113958713B (en) * | 2021-10-29 | 2023-10-10 | 华能秦煤瑞金发电有限责任公司 | Hydraulic pull rod sealing device of medium-speed coal mill |
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| 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: 20130109 Termination date: 20180711 |
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| CF01 | Termination of patent right due to non-payment of annual fee |