CN210240552U - A collection dress formula mechanical seal device for sealing oil pump - Google Patents

Abstract

The utility model discloses a collection dress formula mechanical seal device for sealing oil pump belongs to sealing device technical field for solve the sealing device's of current sealing oil pump sealed effect not good, oil leakage appears from quiet ring department in oil, appears the oil leak even, gets rid of the problem of the phenomenon of oil. The utility model discloses a pivot, the cover is equipped with the axle sleeve in the pivot, the axle sleeve overcoat is equipped with the end cover, the through-hole coaxial with the pivot is seted up to the diapire of end cover, the outside bending type of one end of axle sleeve becomes the kink, be provided with annular rotating ring between kink and the axle sleeve outer wall, the axle sleeve still overlaps outward and is equipped with quiet ring, the diapire annular of end cover is provided with a plurality of standing grooves, the inslot all is provided with the compression spring with quiet ring lateral wall interconnect, the end cover inner wall is provided with the arch, the outer wall and the quiet ring of axle sleeve, form first sealed chamber between the inner wall of arch and end cover, it is equipped with the drive ring that is located the.

Description

A collection dress formula mechanical seal device for sealing oil pump

Technical Field

The utility model relates to a quick-witted sealing device technical field, more specifically relate to a collection dress formula mechanical seal device for sealing oil pump.

Background

A coal-fired power generating set is a mechanical device for converting chemical energy of fossil fuels such as coal and the like into electric energy. Each unit is provided with a set of sealing oil control system, which is an auxiliary system configured by the motor, and provides continuous sealing oil for a generator shaft seal device, and monitors and protects the sealing oil. The sealing oil control system mainly comprises an air side alternating-current pump, an air side direct-current pump, a hydrogen side alternating-current pump, a hydrogen side direct-current pump and the like.

The conventional oil pump adopts a common large-spring single-end-face mechanical seal, a transmission ring I, a movable ring I and a stationary ring I are sleeved on a rotating shaft, the stationary ring I is fixedly connected with one end of an end cover, the transmission ring I and the movable ring I are mutually connected through a spring I, the movable ring I and the stationary ring I are in close contact to realize the sealing of the single end face, a pin hole is formed in the transmission ring I, a positioning pin is arranged on the rotating shaft, and the pin hole is matched with the positioning pin to realize the fixing of the transmission ring; although the requirement on the axial positioning size of the large spring single-end-face mechanical seal is not strict, the large spring single-end-face mechanical seal also has the defects that a pin hole on a transmission ring is difficult to align a shaft to a positioning pin, the rotation direction of a spring is not easy to distinguish and the like, and after the large spring single-end-face mechanical seal is operated for a period of time, the oil leakage condition occurs from a static ring, maintenance personnel are required to regularly clean accumulated oil, the field civilized production is seriously influenced, and the labor intensity of workers is greatly increased; and the conditions of oil leakage, oil throwing and the like are seriously generated, the machine seal needs to be replaced on line, and the risk of the running of the unit is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in order to solve the current sealing device's of sealed oil pump sealed effect not good, oil leakage appears from quiet ring department, appears the oil leak even, gets rid of the problem of the phenomenon of oil, the utility model provides a collection dress formula mechanical seal device for sealed oil pump.

The utility model discloses a realize above-mentioned purpose and specifically adopt following technical scheme:

the utility model discloses a collection dress formula mechanical seal device for sealing oil pump, including the pivot, the cover is equipped with the axle sleeve in the pivot, the axle sleeve overcoat is equipped with the end cover, the through-hole coaxial with the pivot is seted up to the bottom wall of end cover, the inner wall of end cover is parallel to each other with the axis of pivot, the one end of axle sleeve outwards buckles and forms the kink, be provided with annular rotating ring between kink and the axle sleeve outer wall, the axle sleeve is still overlapped and is equipped with quiet ring outward, quiet ring is located between the bottom wall of rotating ring and end cover, the bottom wall of end cover is annular to be provided with a plurality of standing grooves, all be provided with compression spring in the arbitrary standing groove, compression spring interconnects with quiet ring lateral wall, the end cover inner wall is provided with the annular arch that, a first sealing cavity is formed between the protrusion and the inner wall of the end cover, a transmission ring located on the outer side of the end cover is further sleeved on the shaft sleeve, and a positioning plate is arranged between the transmission ring and the end cover.

The utility model relates to a further preferred, the outer wall cover of end cover is equipped with annular casing, and the casing is sunken formation recess outward, forms the sealed chamber of second between the outer wall of recess and end cover, sets up the first leakage hole that communicates the sealed chamber of first sealed chamber of intercommunication and second on the end cover, and the outer wall of casing is provided with the second and lets out the leakage hole, and the second lets out the leakage hole and sets the plug.

The utility model relates to a further preferred, seted up the cooperation ladder between rotating ring and the kink, be provided with first sealing washer between rotating ring and the kink.

The utility model relates to a further preferred, be provided with the second sealing washer between the outer wall of arch and quiet ring.

The utility model relates to a further preferred, be provided with a plurality of annular throttle grooves between the diapire of end cover and the outer wall of axle sleeve.

The utility model relates to a further preferred, the outer wall of axle sleeve still is provided with annular bearing board, and rotating ring and quiet ring are located the both sides of bearing board respectively to rotating ring and quiet ring in close contact with, the inboard of quiet ring is seted up and is held the groove with the bearing of the mutual adaptation of bearing board.

The utility model relates to a further preferred, the rotating ring adopts the carborundum preparation to form, and quiet ring adopts the graphite preparation to form.

The utility model has the advantages as follows:

1. the utility model adopts a balanced single-end face cartridge mechanical seal structure, which assembles the shaft sleeve, the end cover, the movable ring, the static ring, the compression spring, the first seal ring, the second seal ring, the positioning plate, the transmission ring and other modules together, the assembly precision is high, and the installation and the disassembly are simple and easy to understand; the medium is positioned between the inner wall of the end cover and the outer walls of the movable ring and the static ring, the first sealing cavity is positioned between the inner side walls of the movable ring and the static ring and the shaft sleeve, the medium permeates into the first sealing cavity through the combined surface of the movable ring and the static ring, the seepage direction of the medium is opposite to the centrifugal force direction when the rotating shaft rotates, and the seepage can be effectively inhibited; the transmission ring is positioned on the outer side of the end cover, the positioning plate is arranged on the outer wall of the end cover, and the transmission ring is provided with the positioning groove which is matched with the positioning plate, so that the positioning and fixing of the transmission ring are realized, and the problem that a pin hole in the transmission ring is difficult to position a positioning pin on a rotating shaft in the prior art is effectively solved; the integration of the transmission ring, the shaft sleeve and the end cover is ensured; the balance type design can bear higher pressure in the pump, and the application range is wide; the shell is easy to adjust, easy to install and detach, and the position and the angle of the shell can be flexibly adjusted according to the field space.

2. A shell is additionally arranged on the outer side of the end cover, the shell is sunken outwards to form a groove, a second sealing cavity is formed between the groove and the outer wall of the end cover, and the first leakage hole and the second leakage hole are both vertically downward during installation; the working principle is that the more the medium infiltrated into the first sealing cavity is accumulated, the more the medium is, the medium can enter the second sealing cavity through the first leakage hole under the action of gravity and centrifugal force, and when the second sealing cavity is in a working state, the second leakage hole is blocked through the plug, and only the plug needs to be unscrewed periodically to clean the medium inside; through above-mentioned structure, collect the medium of seepage, effectively solved the medium from quiet ring department appear the oil leakage even after the oil leak, get rid of the condition of oil, can effectually prevent that tiny oil drips to get rid of pump case, backplate and subaerial, guarantee on-the-spot clean and clean, accomplish civilized production, also increased the reliability of unit safety and stability operation simultaneously.

3. Cooperate through the ladder between rotating ring and the kink to still be provided with first sealing washer between rotating ring and the kink, effectively avoid the medium to enter into the outer wall of axle sleeve through the space between rotating ring and the kink, improve sealing device's sealed effect.

4. The inner wall of end cover sets up annular arch, and the outer wall of arch and quiet ring is in close contact with each other to set up the sealing washer between the outer wall of arch and quiet ring, guarantee the compactness of arch and quiet ring outer wall, avoid the medium to enter into first sealed intracavity through the clearance between arch and the quiet ring, improve sealed effect.

5. A plurality of throttle grooves between the inner wall of through-hole and the outer wall of axle sleeve will carry out multistage collection through the medium in clearance between end cover and the axle sleeve, and the medium that can effectual suppression infiltration in first sealed chamber flows outside the sealing surface.

6. The movable ring and the static ring are divided at the bearing plate, and when a medium leaks, the medium permeates into the first sealing cavity through the joint surface of the movable ring and the static ring; play the effect of bearing to quiet ring through the bearing board to the opposite side of quiet ring is connected with the standing groove through a plurality of little springs, and the atress is even, and the floatability is good.

7. The mechanical seal dynamic ring adopts SiC, the static ring adopts M120D, and the dynamic and static rings adopt a 'soft-hard' friction pair, so that the pairing is reasonable and the sealing performance is good. The rotating ring is made of SiC materials, and has high strength, small friction coefficient, self-lubrication and high stability. The static ring adopts M120D, and has good self-lubricating property and heat resistance and heat conduction performance.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of the end cap of FIG. 1;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 4 is a prior art schematic;

reference numerals: 1-rotating shaft, 110-medium, 2-shaft sleeve, 210-bending part, 3-end cover, 310-through hole, 4-moving ring, 5-static ring, 6-bulge, 7-placing groove, 710-compression spring, 8-first sealing cavity, 9-driving ring, 10-positioning plate, 11-shell, 12-second sealing cavity, 13-first leakage hole, 14-second leakage hole, 1410-plug, 15-first sealing ring, 16-second sealing ring, 17-throttling groove, 18-supporting plate, 19-driving ring I, 20-spring I, 21-moving ring I, 22-static ring I.

Detailed Description

For a better understanding of the present invention, the present invention will be described in further detail with reference to the following embodiments and the accompanying drawings of fig. 1 to 4.

As shown in fig. 4, the reference numerals are 19-driving ring i, 20-spring i, 21-moving ring i, 22-static ring i, corresponding to the prior art in the background art.

Example 1

The utility model discloses a collection dress formula mechanical seal device for sealing oil pump, including pivot 1, the cover is equipped with axle sleeve 2 on the pivot 1, axle sleeve 2 overcoat is equipped with end cover 3, the through-hole 310 coaxial with pivot 1 is seted up to the bottom wall of end cover 3, the inner wall of end cover 3 is parallel to each other with the axis of pivot 1, the outside bending type of one end of axle sleeve 2 forms bending portion 210, be provided with annular rotating ring 4 between bending portion 210 and the axle sleeve 2 outer wall, axle sleeve 2 still overlaps outward and is equipped with quiet ring 5, quiet ring 5 is located between the rotating ring 4 and the bottom wall of end cover 3, the bottom wall of end cover 3 is annular to be provided with a plurality of standing grooves 7, all be provided with compression spring 710 in the arbitrary standing groove 7, compression spring 710 and quiet ring 5 lateral wall interconnect, the inner wall of end cover 3 is provided with the annular arch 6 that closely contacts with the outer wall of quiet ring 5, form first seal chamber 8 between the outer wall of axle sleeve, the shaft sleeve 2 is further sleeved with a transmission ring 9 located on the outer side of the end cover 3, and a positioning plate 10 is arranged between the transmission ring 9 and the end cover 3.

After the technical scheme is adopted, the utility model discloses a balanced type single-ended face cartridge-type mechanical seal structure, with axle sleeve 2, end cover 3, rotating ring 4, quiet ring 5, compression spring 710, first sealing washer 15, second sealing washer 16, locating plate 10 and driving ring 9 etc. modular assembly together, the assembly precision is high, and installation and dismantlement are simple and understandable; the medium 110 is positioned between the inner wall of the end cover 3 and the outer walls of the movable ring 4 and the static ring 5, the medium 110 mentioned in the application is oil, the first sealing cavity 8 is positioned between the inner side walls of the movable ring 4 and the static ring 5 and the shaft sleeve 2, the medium 110 penetrates through the joint surface of the movable ring 4 and the static ring 5 to permeate into the first sealing cavity 8, the seepage direction of the medium is opposite to the centrifugal force direction when the rotating shaft 1 rotates, and seepage can be effectively inhibited; the transmission ring 9 is positioned on the outer side of the end cover 3, the positioning plate 10 is arranged on the outer wall of the end cover 3, the transmission ring 9 is provided with a positioning groove which is matched with the positioning plate 10, positioning and fixing of the transmission ring 9 are achieved, and the problem that pin holes in the transmission ring 9 are difficult to position pins on the rotating shaft 1 in the prior art is effectively solved; the integration of the transmission ring 9 with the shaft sleeve 2 and the end cover 3 is ensured; the balance type design can bear higher pressure in the pump, and the application range is wide; the shell 11 is easy to adjust, easy to install and detach, and the position and the angle of the shell 11 can be flexibly adjusted according to the field space.

Example 2

The present embodiment is further optimized on the basis of embodiment 1 as follows: the outer wall cover of end cover 3 is equipped with annular casing 11, and casing 11 is sunken outward and is formed the recess, forms second sealed chamber 12 between the outer wall of recess and end cover 3, has seted up the first leakage hole 13 of the first sealed chamber 8 of intercommunication and second sealed chamber 12 on the end cover 3, and the outer wall of casing 11 is provided with second leakage hole 14, and second leakage hole 14 sets plug 1410.

After the technical scheme is adopted, the shell 11 is additionally arranged on the outer side of the end cover 3, the shell 11 is sunken outwards to form a groove, a second sealing cavity 12 is formed between the groove and the outer wall of the end cover 3, and the first leakage hole 13 and the second leakage hole 14 are both vertically downward during installation; the working principle is that the more the medium 110 seeping into the first sealed cavity 8 is accumulated, the more the medium 110 is, the medium enters the second sealed cavity 12 through the first leakage hole 13 under the action of gravity and centrifugal force, when the medium is in a working state, the second leakage hole 14 is blocked through the plug 1410, and only the plug 1410 needs to be unscrewed periodically to clean the medium 110 inside; through above-mentioned structure, collect the medium 110 of seepage, effectively solved medium 110 from quiet ring 5 the condition back that the oil seepage appears even the oil leak, get rid of oil, can effectually prevent that tiny oil drips to get rid of pump case, backplate and subaerial, guarantee that the scene is clean, accomplish civilized production, also increased the reliability of unit safety and stability operation simultaneously.

Example 3

The present embodiment is further optimized on the basis of embodiment 1 as follows: a matching step is arranged between the movable ring 4 and the bending part 210, and a first sealing ring 15 is arranged between the movable ring 4 and the bending part 210.

After the technical scheme is adopted, the movable ring 4 is matched with the bent part 210 through the ladder, the first sealing ring 15 is further arranged between the movable ring 4 and the bent part 210, the medium 110 is effectively prevented from entering the outer wall of the shaft sleeve 2 through the space between the movable ring 4 and the bent part 210, and the sealing effect of the sealing device is improved.

Example 4

The present embodiment is further optimized on the basis of embodiment 1 as follows: a second sealing ring 16 is arranged between the bulge 6 and the outer wall of the static ring 5.

After adopting above-mentioned technical scheme, the inner wall of end cover 3 sets up annular arch 6, and the outer wall of arch 6 and quiet ring 5 each other in close contact with to set up the sealing washer between arch 6 and the outer wall of quiet ring 5, guarantee the compactness of arch 6 and the outer wall of quiet ring 5, avoid medium 110 to enter into first seal chamber 8 through the clearance between arch 6 and the quiet ring 5 in, improve sealed effect.

Example 5

The present embodiment is further optimized on the basis of embodiment 1 as follows: a plurality of annular throttling grooves 17 are arranged between the bottom wall of the end cover 3 and the outer wall of the shaft sleeve 2.

After adopting above-mentioned technical scheme, a plurality of throttle grooves 17 between the inner wall of through-hole 310 and the outer wall of axle sleeve 2 will carry out multistage collection through the medium 110 in the clearance between end cover 3 and the axle sleeve 2, can effectually restrain the medium 110 that infiltrates in first seal chamber 8 and flow outside the sealed face.

Example 6

The present embodiment is further optimized on the basis of embodiment 1 as follows: the outer wall of the shaft sleeve 2 is also provided with an annular bearing plate 18, the movable ring 4 and the static ring 5 are respectively positioned at two sides of the bearing plate 18, the movable ring 4 is in close contact with the static ring 5, and the inner side of the static ring 5 is provided with a bearing groove matched with the bearing plate 18.

After the technical scheme is adopted, the movable ring 4 and the static ring 5 are divided at the bearing plate 18, and when the medium 110 leaks, the medium permeates into the first sealing cavity 8 through the joint surface of the movable ring 4 and the static ring 5; play the effect of bearing to quiet ring 5 through bearing board 18 to the opposite side of quiet ring 5 is connected with standing groove 7 through a plurality of little springs, and the atress is even, and the floatability is good.

Example 7

The present embodiment is further optimized on the basis of embodiment 1 as follows: the moving ring 4 is made of silicon carbide, and the static ring 5 is made of graphite.

After the technical scheme is adopted, the mechanical seal moving ring 4 is made of SiC, the static ring 5 is made of M120D, and the moving ring 5 and the static ring 5 are made of a 'soft and hard' friction pair, so that the mechanical seal moving ring and the static ring are reasonable in pairing and good in sealing performance. The moving ring 4 is made of SiC material, and has high strength, small friction coefficient, self-lubrication and high stability. The static ring 5 adopts M120D, and has good self-lubricating property and heat resistance and heat conduction property.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The container type mechanical sealing device for sealing the oil pump comprises a rotating shaft (1) and is characterized in that a shaft sleeve (2) is sleeved on the rotating shaft (1), an end cover (3) is sleeved outside the shaft sleeve (2), a through hole (310) coaxial with the rotating shaft (1) is formed in the bottom wall of the end cover (3), the inner wall of the end cover (3) is parallel to the axis of the rotating shaft (1), one end of the shaft sleeve (2) is outwards bent to form a bent part (210), an annular movable ring (4) is arranged between the bent part (210) and the outer wall of the shaft sleeve (2), a static ring (5) is further sleeved outside the shaft sleeve (2), the static ring (5) is located between the movable ring (4) and the bottom wall of the end cover (3), a plurality of placing grooves (7) are annularly arranged on the bottom wall of the end cover (3), and a compression spring (710) is optionally arranged in each placing groove (7), compression spring (710) and quiet ring (5) lateral wall interconnect, end cover (3) inner wall be provided with quiet ring (5) outer wall in close contact with annular protruding (6), form first sealed chamber (8) between the outer wall of axle sleeve (2) and the inner wall of quiet ring (5), protruding (6) and end cover (3), it is equipped with drive ring (9) that are located the end cover (3) outside still to overlap on axle sleeve (2), be provided with locating plate (10) between drive ring (9) and end cover (3).

2. The cartridge type mechanical sealing device for sealing the oil pump according to claim 1, wherein an annular housing (11) is sleeved on the outer wall of the end cover (3), the housing (11) is recessed outwards to form a groove, a second sealing cavity (12) is formed between the groove and the outer wall of the end cover (3), a first leakage hole (13) communicating the first sealing cavity (8) with the second sealing cavity (12) is formed in the end cover (3), a second leakage hole (14) is formed in the outer wall of the housing (11), and a plug (1410) is arranged in the second leakage hole (14).

3. The cartridge type mechanical sealing device for sealing an oil pump according to claim 1, wherein a matching step is provided between the rotating ring (4) and the bending part (210), and a first sealing ring (15) is provided between the rotating ring (4) and the bending part (210).

4. A unit-type mechanical sealing device for sealing an oil pump according to claim 1, characterized in that a second sealing ring (16) is arranged between the protrusion (6) and the outer wall of the stationary ring (5).

5. A unit-type mechanical seal for sealing an oil pump according to claim 1, characterized in that a plurality of annular throttling grooves (17) are provided between the bottom wall of the end cover (3) and the outer wall of the shaft sleeve (2).

6. The integrated mechanical sealing device for sealing the oil pump according to claim 1, wherein an annular bearing plate (18) is further disposed on an outer wall of the shaft sleeve (2), the moving ring (4) and the stationary ring (5) are respectively located on two sides of the bearing plate (18), the moving ring (4) is in close contact with the stationary ring (5), and a bearing groove adapted to the bearing plate (18) is formed in an inner side of the stationary ring (5).

7. The integrated mechanical seal device for sealing an oil pump according to claim 1, wherein the rotating ring (4) is made of silicon carbide, and the stationary ring (5) is made of graphite.

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