CN113217368B - Reciprocating oil seal assembly for emulsion pump - Google Patents
Reciprocating oil seal assembly for emulsion pump Download PDFInfo
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- CN113217368B CN113217368B CN202110275891.1A CN202110275891A CN113217368B CN 113217368 B CN113217368 B CN 113217368B CN 202110275891 A CN202110275891 A CN 202110275891A CN 113217368 B CN113217368 B CN 113217368B
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- seal
- annular groove
- peripheral surface
- piston
- axial direction
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- 239000000839 emulsion Substances 0.000 title claims abstract description 36
- 238000007789 sealing Methods 0.000 claims abstract description 39
- 230000002093 peripheral effect Effects 0.000 claims description 70
- 229920000459 Nitrile rubber Polymers 0.000 claims description 4
- 229910000906 Bronze Inorganic materials 0.000 claims description 3
- 239000010974 bronze Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 35
- 239000010687 lubricating oil Substances 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/02—Packing the free space between cylinders and pistons
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses a reciprocating oil seal assembly for an emulsion pump. A piston rod of the emulsion pump is adapted to be capable of passing through the piston hole, and a gap is provided between the circumferential surface of the piston rod and the wall surface of the piston hole. The first annular groove and the third annular groove are arranged at intervals in the axial direction of the piston bore, and the third annular groove is located between the first annular groove and the second annular groove in the axial direction of the piston bore. The first sealing element is arranged in the first annular groove, the second sealing element is arranged in the second annular groove, and the third sealing element is arranged in the third annular groove so as to seal a gap between the circumferential surface of the piston rod and the wall surface of the piston hole. The reciprocating oil seal assembly for the emulsion pump has the advantages of good reliability and long service life.
Description
Technical Field
The invention relates to the technical field of oil sealing, in particular to a reciprocating oil seal assembly for an emulsion pump.
Background
The oil seal is a mechanical element used for sealing lubricating oil (lubricating oil is the most common lubricating medium in a transmission system), and the oil seal isolates parts needing lubrication from stressed parts in a transmission part so as not to allow the lubricating oil to leak. The piston rod of the emulsion pump continuously reciprocates at a high speed, the oil seal of the related art is arranged between the piston rod and the seal shell, and the oil seal is easy to wear and short in service life under the continuous high-speed reciprocating motion of the piston rod.
Disclosure of Invention
The present invention is based on the discovery and recognition by the inventors of the following facts and problems:
an oil seal of an emulsion pump of the related art is provided on a mount case, and an inner peripheral surface of the oil seal is in contact with a peripheral surface of a piston rod to block lubricating oil, thereby preventing leakage of the lubricating oil. However, the piston rod of the emulsion pump can form local high pressure between the piston rod and the sealing shell in the reciprocating motion process, so that the friction force of an oil seal can be increased, the abrasion of the oil seal is aggravated, the service life of the oil seal is further shortened, once the oil seal is seriously abraded, lubricating oil leakage can be caused, and the labor intensity under a mine is increased.
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the embodiment of the invention provides a reciprocating oil seal assembly for an emulsion pump, which has the advantages of good reliability and long service life.
The reciprocating oil seal assembly for the emulsion pump according to the embodiment of the invention comprises:
the sealing housing is provided with a piston hole, the piston hole is suitable for being communicated with a piston cavity of the emulsion pump and the outside, a piston rod of the emulsion pump is suitable for being capable of penetrating through the piston hole, and a gap is formed between the peripheral surface of the piston rod and the wall surface of the piston hole;
a first annular groove, a second annular groove and a third annular groove,
each of the first annular groove, the second annular groove, and the third annular groove is provided on a bore wall of the piston bore, the first annular groove and the third annular groove being arranged at intervals in an axial direction of the piston bore, the third annular groove being located between the first annular groove and the second annular groove in the axial direction of the piston bore; and
a first seal, a second seal and a third seal,
the first seal member is provided in the first annular groove, an inner peripheral surface of the first seal member is adapted to be in contact with a peripheral surface of the piston rod, an outer peripheral surface of the first seal member is in contact with a bottom wall surface of the first annular groove so as to seal a gap between the peripheral surface of the piston rod and a bore wall surface of the piston bore,
the second seal member is provided in the second annular groove, an inner peripheral surface of the second seal member is adapted to be in contact with a peripheral surface of the piston rod, an outer peripheral surface of the second seal member is in contact with a bottom wall surface of the second annular groove so as to seal a gap between the peripheral surface of the piston rod and a bore wall surface of the piston bore,
the third seal member is provided in the third annular groove, a part of an inner peripheral surface of the third seal member is adapted to be in contact with a peripheral surface of the piston rod, and a part of an outer peripheral surface of the third seal member is in contact with a bottom wall surface of the third annular groove so as to seal a gap between the peripheral surface of the piston rod and a bore wall surface of the piston bore.
According to the reciprocating oil seal assembly for the emulsion pump, disclosed by the embodiment of the invention, the first sealing element, the second sealing element and the third sealing element can seal the gap between the peripheral surface of the piston rod and the wall surface of the hole of the piston hole, double sealing is carried out on oil in the piston cavity, and the reliability and the service life are improved.
Therefore, the reciprocating oil seal assembly for the emulsion pump has the advantages of being good in reliability and long in service life.
In some embodiments, the third seal comprises:
the inner peripheral surface of the main body is suitable for forming a gap with the peripheral surface of the piston rod, and a gap is formed between the outer peripheral surface of the main body and the bottom wall surface of the third annular groove;
a first annular lip and a second annular lip, each of the first annular lip and the second annular lip being provided on a side of the main body adjacent to the second seal member in an axial direction of the piston hole, the second annular lip being located outside the first annular lip in a radial direction of the piston hole,
at least a part of an inner peripheral surface of the first annular lip is adapted to be in contact with a peripheral surface of the piston rod, a side of the first annular lip, which is away from the second seal member in the axial direction of the piston bore, is connected to the main body,
at least a part of an outer peripheral surface of the second annular lip is in contact with a bottom wall surface of the third annular groove, and a side of the second annular lip, which is away from the second seal member in the axial direction of the piston bore, is connected to the main body; and
an annular groove formed between an outer circumferential surface of the first annular lip and an inner circumferential surface of the second annular lip.
In some embodiments, the annular groove is V-shaped in cross-section.
In some embodiments, a first clearance is provided between a side of the first annular lip adjacent to the second seal in the axial direction of the piston bore and a side surface of the second annular groove adjacent to the second seal in the axial direction of the piston bore, a second clearance is provided between a side of the second annular lip adjacent to the second seal in the axial direction of the piston bore and a side surface of the second annular groove adjacent to the second seal in the axial direction of the piston bore, and the first clearance is larger than the second clearance.
In some embodiments, the first seal is adjacent the environment in an axial direction of the piston bore and the second seal is adjacent the piston cavity in the axial direction of the piston bore.
In some embodiments, the first seal comprises:
the inner circumferential surface of the first sealing ring is suitable for being in contact with the circumferential surface of the piston rod; and
first and second O-rings arranged at an interval in an axial direction of the piston bore, each of the first and second O-rings being provided between an outer peripheral surface of the first seal ring and a bottom wall surface of the first annular groove, an inner peripheral surface of each of the first and second O-rings being in contact with the outer peripheral surface of the first seal ring, and an outer peripheral surface of each of the first and second O-rings being in contact with the bottom wall surface of the first annular groove.
In some embodiments, the second seal comprises:
the inner circumferential surface of the second sealing ring is suitable for being in contact with the circumferential surface of the piston rod; and
and the third O-shaped ring is arranged between the outer peripheral surface of the second sealing ring and the bottom wall surface of the second annular groove, the inner peripheral surface of the third O-shaped ring is in contact with the outer peripheral surface of the second sealing ring, and the outer peripheral surface of the third O-shaped ring is in contact with the bottom wall surface of the second annular groove.
In some embodiments, each of the first and second seal rings is made of a polytetrafluoroethylene bronze composite, each of the first, second, and third O-rings is made of nitrile rubber, and the third seal is made of polyurethane.
In some embodiments, an end face of the seal housing, which is remote from the second seal in the axial direction of the piston bore, has a plurality of connecting holes for mounting the seal housing on a cylinder of the emulsion pump.
In some embodiments, the reciprocating oil seal assembly for an emulsion pump further comprises a fourth O-ring and a fourth annular groove, the fourth annular groove being provided on the outer circumferential surface of the seal housing, the fourth O-ring being provided in the fourth annular groove so as to seal a gap between the outer circumferential surface of the seal housing and the inner circumferential surface of the cylinder block.
Drawings
Fig. 1 is a schematic structural view of an oil seal assembly of an embodiment of the present invention.
Fig. 2 is a partially enlarged view of fig. 1.
Reference numerals:
a piston rod 100;
a hermetic case 200; a piston bore 201; a first annular groove 210; a second annular groove 220; a third annular groove 230; a fourth annular groove 240; a connection hole 250;
a first seal 300; a first seal ring 310; a first O-ring 320; a second O-ring 330;
a second seal 400; a second seal ring 410; a third O-ring 420;
a third seal 500; a main body 510; a first annular lip 520; a second annular lip 530; an annular groove 540;
a fourth O-ring 600.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A reciprocating oil seal assembly for an emulsion pump according to an embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1 and 2, the reciprocating oil seal assembly for an emulsion pump according to an embodiment of the present invention includes a seal housing 200, a first annular groove 210, a second annular groove 220, a third annular groove 230, a first seal 300, a second seal 400, and a third seal 500.
As shown in fig. 1 and 2, the seal housing 200 has a piston hole 201, the piston hole 201 is adapted to be able to communicate a piston chamber (not shown) of the emulsion pump with the outside, the piston rod 100 of the emulsion pump is adapted to be able to pass through the piston hole 201, and a gap is provided between the circumferential surface of the piston rod 100 and the hole wall surface of the piston hole 201. It is understood that one end of the piston rod 100 is located at the outside, the other end of the piston rod 100 is located in the piston cavity, and the piston rod 100 can reciprocate in the piston hole 201.
As shown in fig. 1 and 2, each of the first, second, and third annular grooves 210, 220, 230 is provided on the bore wall of the piston bore 201. The first annular groove 210 and the third annular groove 230 are arranged at intervals in the axial direction of the piston bore 201, and the third annular groove 230 is located between the first annular groove 210 and the second annular groove 220 in the axial direction (left-right direction in fig. 1) of the piston bore 201. That is, the first, second, and third annular grooves 210, 220, and 230 are sequentially disposed from left to right.
As shown in fig. 1 and 2, the first seal 300 is disposed within the first annular groove 210. The inner circumferential surface of the first seal 300 is adapted to be in contact with the circumferential surface of the piston rod 100, and the outer circumferential surface of the first seal 300 is in contact with the bottom wall surface of the first annular groove 210. Therefore, the first seal 300 can seal the gap between the circumferential surface of the piston rod 100 and the hole wall surface of the piston hole 201. Specifically, the first sealing member 300 is adjacent to the outside in the axial direction of the piston hole 201, that is, the first sealing member 300 is located at the leftmost side, and the first sealing member 300 can block outside coal dust from entering the piston hole 201, thereby performing a dust-proof sealing function.
As shown in fig. 1 and 2, the second seal 400 is disposed within the second annular groove 220. The inner circumferential surface of the second seal 400 is adapted to be in contact with the circumferential surface of the piston rod 100, and the outer circumferential surface of the second seal 400 is in contact with the bottom wall surface of the second annular groove 220. Therefore, the second seal 400 can seal the gap between the circumferential surface of the piston rod 100 and the hole wall surface of the piston hole 201. Specifically, the second seal 400 is adjacent to the piston cavity in the axial direction of the piston hole 201, that is, the second seal 400 is located on the left and right sides, and the first seal 300 can play a main sealing role for oil in the piston cavity, so as to prevent oil leakage.
As shown in fig. 1 and 2, a third seal 500 is disposed within the third annular groove 230. A part of the inner circumferential surface of the third seal 500 is adapted to be in contact with the circumferential surface of the piston rod 100, and a part of the outer circumferential surface of the third seal 500 is in contact with the bottom wall surface of the third annular groove 230. Therefore, the third seal 500 can seal the gap between the circumferential surface of the piston rod 100 and the hole wall surface of the piston hole 201. Specifically, the third seal 500 is located between the first seal 300 and the second seal 400, and the third seal 500 can perform an auxiliary sealing function on oil in the piston cavity, so as to further prevent oil leakage.
According to the reciprocating oil seal assembly for the emulsion pump, disclosed by the embodiment of the invention, the first seal 300, the second seal 400 and the third seal 500 can seal gaps between the peripheral surface of the piston rod 100 and the wall surface of the piston hole 201, double sealing is realized on oil in the piston cavity, and the reliability and the service life are improved. Further, the plurality of seals seal the gap between the circumferential surface of the piston rod 100 and the hole wall surface of the piston hole 201, so that the degree of damage of the piston rod 100 to the seals can be reduced, and the wear of the seals can be reduced.
Therefore, the reciprocating oil seal assembly for the emulsion pump has the advantages of being good in reliability and long in service life.
In some embodiments, as shown in fig. 2, the third seal 500 includes a body 510, a first annular lip 520, a second annular lip 530, and an annular groove 540.
The inner circumferential surface of the main body 510 is adapted to have a gap with the circumferential surface of the piston rod 100, and the outer circumferential surface of the main body 510 has a gap with the bottom wall surface of the third annular groove 230.
Each of the first and second annular lips 520 and 530 is provided on a side of the main body 510 adjacent to the second seal 400 in the axial direction of the piston bore 201, and the second annular lip 530 is located outside the first annular lip 520 in the radial direction of the piston bore 201.
At least a part of the inner circumferential surface of the first annular lip 520 is adapted to contact the circumferential surface of the piston rod 100, and the side of the first annular lip 520 remote from the second seal 400 in the axial direction of the piston bore 201 is connected to the main body 510.
At least a part of the outer peripheral surface of the second annular lip 530 is in contact with the bottom wall surface of the third annular groove 230, and the side of the second annular lip 530 remote from the second seal 400 in the axial direction of the piston bore 201 is connected to the main body 510.
The annular groove 540 is formed between an outer circumferential surface of the first annular lip 520 and an inner circumferential surface of the second annular lip 530, and the annular groove 540 has a V-shaped cross section.
Specifically, the third seal 500 is made of polyurethane. Therefore, the third sealing element 500 has the advantages of wear resistance, oil resistance and good elasticity.
According to the reciprocating oil seal assembly for emulsion pump in the embodiment of the present invention, the local high pressure formed between the piston rod 100 and the piston hole 201 of the seal housing 200 may press the first annular lip 520, so that the first annular lip 520 expands outwards, the volume of the annular groove 540 decreases, and the pressure between the piston rod 100 and the piston hole 201 of the seal housing 200 decreases, therefore, the third seal 500 performs a pressure relief function, and further the friction force between the seal and the piston rod 100 reduces the wear of the seal caused by the piston rod 100.
In some embodiments, as shown in fig. 2, there is a first gap between a side of the first annular lip 520 adjacent the second seal 400 in the axial direction of the piston bore 201 and a side of the second annular groove 220 adjacent the second seal 400 in the axial direction of the piston bore 201. A second clearance is provided between a side of the second annular lip 530 adjacent to the second seal 400 in the axial direction of the piston bore 201 and a side of the second annular groove 220 adjacent to the second seal 400 in the axial direction of the piston bore 201. Wherein the first gap is larger than the second gap. When the third sealing member 500 performs the auxiliary sealing function, the annular groove 540 is filled with oil, and when the first annular lip 520 is compressed, the volume of the annular groove 540 is reduced, and the oil in the annular groove 540 flows out from the first gap. Therefore, the first gap is larger than the second gap, which facilitates the oil in the annular groove 540 to flow out from the first gap, thereby facilitating the improvement of the sealing effect of the third sealing member 500.
In some embodiments, as shown in fig. 2, the first seal 300 includes a first seal ring 310, a first O-ring 320, and a second O-ring 330.
The inner circumferential surface of the first sealing ring 310 is adapted to contact the circumferential surface of the piston rod 100. The first and second O- rings 320 and 330 are spaced apart in the axial direction of the piston bore 201. Each of the first and second O- rings 320 and 330 is provided between the outer peripheral surface of the first seal ring 310 and the bottom wall surface of the first annular groove 210, the inner peripheral surface of each of the first and second O- rings 320 and 330 is in contact with the outer peripheral surface of the first seal ring 310, and the outer peripheral surface of each of the first and second O- rings 320 and 330 is in contact with the bottom wall surface of the first annular groove 210.
As shown in fig. 2, the second seal 400 includes a second seal ring 410 and a third O-ring 420. The inner circumferential surface of the second sealing ring 410 is adapted to contact the circumferential surface of the piston rod 100. The third O-ring 420 is provided between the outer peripheral surface of the second seal ring 410 and the bottom wall surface of the second annular groove 220, the inner peripheral surface of the third O-ring 420 is in contact with the outer peripheral surface of the second seal ring 410, and the outer peripheral surface of the third O-ring 420 is in contact with the bottom wall surface of the second annular groove 220.
Specifically, each of the first and second seal rings 310, 410 is made of a polytetrafluoroethylene bronze composite, and each of the first, second and third O- rings 320, 330, 420 is made of nitrile rubber.
Therefore, the first seal ring 310 and the second seal ring 410 have a low friction coefficient, and can perform a lubricating function while performing a sealing function, without affecting the reciprocating movement of the piston rod 100. The first O-ring 320 and the second O-ring 330 can press the first seal ring 310 to closely attach the inner circumferential surface of the first seal ring 310 to the circumferential surface of the piston rod 100, and the third O-ring 420 can press the second seal ring 410 to closely attach the inner circumferential surface of the second seal ring 410 to the circumferential surface of the piston rod 100, thereby ensuring a good sealing effect.
As shown in fig. 1, the seal housing 200 has a plurality of connection holes 250 on an end surface thereof remote from the second seal 400 in the axial direction of the piston bore 201. Specifically, the connection hole 250 is a threaded hole. The seal housing 200 is connected to the cylinder of the emulsion pump by bolts that engage threaded holes.
As shown in fig. 1 and 2, the reciprocating oil seal assembly for an emulsion pump further includes a fourth O-ring 600 and a fourth annular groove 240, the fourth annular groove 240 is provided on the outer circumferential surface of the seal housing 200, and the fourth O-ring 600 is provided in the fourth annular groove 240. The fourth O-ring 600 is also made of nitrile rubber. The fourth O-ring 600 can seal a gap between the outer circumferential surface of the seal housing 200 and the inner circumferential surface of the cylinder.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (7)
1. The utility model provides a reciprocal oil blanket subassembly is used to emulsion pump which characterized in that includes:
the sealing housing is provided with a piston hole, the piston hole is suitable for being communicated with a piston cavity of the emulsion pump and the outside, a piston rod of the emulsion pump is suitable for being capable of penetrating through the piston hole, and a gap is formed between the peripheral surface of the piston rod and the wall surface of the piston hole;
a first annular groove, a second annular groove and a third annular groove,
each of the first annular groove, the second annular groove, and the third annular groove is provided on a bore wall of the piston bore, the first annular groove and the third annular groove being arranged at intervals in an axial direction of the piston bore, the third annular groove being located between the first annular groove and the second annular groove in the axial direction of the piston bore; and
a first seal, a second seal and a third seal,
the first seal member is provided in the first annular groove, an inner peripheral surface of the first seal member is adapted to be in contact with a peripheral surface of the piston rod, an outer peripheral surface of the first seal member is in contact with a bottom wall surface of the first annular groove so as to seal a gap between the peripheral surface of the piston rod and a bore wall surface of the piston bore,
the second seal member is provided in the second annular groove, an inner peripheral surface of the second seal member is adapted to be in contact with a peripheral surface of the piston rod, an outer peripheral surface of the second seal member is in contact with a bottom wall surface of the second annular groove so as to seal a gap between the peripheral surface of the piston rod and a bore wall surface of the piston bore,
the third sealing element is arranged in the third annular groove, part of the inner peripheral surface of the third sealing element is suitable for being in contact with the peripheral surface of the piston rod, and part of the outer peripheral surface of the third sealing element is in contact with the bottom wall surface of the third annular groove so as to seal a gap between the peripheral surface of the piston rod and the hole wall surface of the piston hole;
the first seal member includes:
the inner circumferential surface of the first sealing ring is suitable for being in contact with the circumferential surface of the piston rod; and
first and second O-rings arranged at an interval in an axial direction of the piston bore, each of the first and second O-rings being provided between an outer peripheral surface of the first seal ring and a bottom wall surface of the first annular groove, an inner peripheral surface of each of the first and second O-rings being in contact with the outer peripheral surface of the first seal ring, an outer peripheral surface of each of the first and second O-rings being in contact with the bottom wall surface of the first annular groove;
the second seal member includes:
the inner circumferential surface of the second sealing ring is suitable for being in contact with the circumferential surface of the piston rod; and
a third O-shaped ring, which is arranged between the outer peripheral surface of the second sealing ring and the bottom wall surface of the second annular groove, wherein the inner peripheral surface of the third O-shaped ring is in contact with the outer peripheral surface of the second sealing ring, and the outer peripheral surface of the third O-shaped ring is in contact with the bottom wall surface of the second annular groove;
the third seal member includes:
the inner peripheral surface of the main body is suitable for forming a gap with the peripheral surface of the piston rod, and a gap is formed between the outer peripheral surface of the main body and the bottom wall surface of the third annular groove;
a first annular lip and a second annular lip, each of the first annular lip and the second annular lip being provided on a side of the main body adjacent to the second seal member in an axial direction of the piston hole, the second annular lip being located outside the first annular lip in a radial direction of the piston hole,
at least a part of an inner peripheral surface of the first annular lip is adapted to be in contact with a peripheral surface of the piston rod, a side of the first annular lip, which is away from the second seal member in an axial direction of the piston bore, is connected to the main body,
at least a part of an outer peripheral surface of the second annular lip is in contact with a bottom wall surface of the third annular groove, and a side of the second annular lip, which is away from the second seal member in the axial direction of the piston bore, is connected to the main body; and
an annular groove formed between an outer circumferential surface of the first annular lip and an inner circumferential surface of the second annular lip.
2. The reciprocating oil seal assembly for emulsion pump according to claim 1, wherein the annular groove is V-shaped in cross section.
3. The reciprocating oil seal assembly for an emulsion pump according to claim 1, wherein a first clearance is provided between a side of the first annular lip adjacent to the second seal in the axial direction of the piston bore and a side surface of the second annular groove adjacent to the second seal in the axial direction of the piston bore, a second clearance is provided between a side of the second annular lip adjacent to the second seal in the axial direction of the piston bore and a side surface of the second annular groove adjacent to the second seal in the axial direction of the piston bore, and the first clearance is larger than the second clearance.
4. A reciprocating oil seal assembly for an emulsion pump as defined in claim 3 wherein said first seal is adjacent said outer periphery in the axial direction of said piston bore and said second seal is adjacent said piston chamber in the axial direction of said piston bore.
5. The reciprocating oil seal assembly for emulsion pumps of claim 1, wherein each of said first and second seal rings is made of a polytetrafluoroethylene bronze composite, each of said first, second and third O-rings is made of nitrile rubber, and said third seal is made of polyurethane.
6. The reciprocating oil seal assembly for an emulsion pump according to claim 1, wherein an end surface of said seal housing, which is remote from said second seal in an axial direction of said piston bore, has a plurality of connection holes for mounting said seal housing on a cylinder of said emulsion pump.
7. The reciprocating oil seal assembly for emulsion pump according to claim 6, further comprising a fourth O-ring and a fourth annular groove, said fourth annular groove being provided on the outer peripheral surface of said seal housing, said fourth O-ring being provided in said fourth annular groove so as to seal a gap between the outer peripheral surface of said seal housing and the inner peripheral surface of said cylinder block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110275891.1A CN113217368B (en) | 2021-03-15 | 2021-03-15 | Reciprocating oil seal assembly for emulsion pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110275891.1A CN113217368B (en) | 2021-03-15 | 2021-03-15 | Reciprocating oil seal assembly for emulsion pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113217368A CN113217368A (en) | 2021-08-06 |
| CN113217368B true CN113217368B (en) | 2022-12-27 |
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| CN202110275891.1A Active CN113217368B (en) | 2021-03-15 | 2021-03-15 | Reciprocating oil seal assembly for emulsion pump |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2881159Y (en) * | 2005-12-09 | 2007-03-21 | 天津理工大学 | Improved high pressure sealing structure |
| CN101793273A (en) * | 2009-01-30 | 2010-08-04 | 日立汽车系统株式会社 | Cylinder assembly |
| CN208024660U (en) * | 2018-02-27 | 2018-10-30 | 上海威纳工程技术有限公司 | Hydraulic reciprocating cylinder sealing device |
| CN110296175A (en) * | 2019-07-19 | 2019-10-01 | 娄底市中兴液压件有限公司 | Pneumatic cylinder and vehicle |
| CN211259200U (en) * | 2019-12-24 | 2020-08-14 | 四川欣悦精工科技有限公司 | Oil cylinder system for mold |
| CN211501632U (en) * | 2019-12-19 | 2020-09-15 | 广州市阪上橡胶制品有限公司 | Novel SY type sealing member for reciprocating motion |
| CN212564387U (en) * | 2020-06-22 | 2021-02-19 | 中石化石油机械股份有限公司 | Piston sealing structure and sealing piece for hydraulic oscillator |
-
2021
- 2021-03-15 CN CN202110275891.1A patent/CN113217368B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2881159Y (en) * | 2005-12-09 | 2007-03-21 | 天津理工大学 | Improved high pressure sealing structure |
| CN101793273A (en) * | 2009-01-30 | 2010-08-04 | 日立汽车系统株式会社 | Cylinder assembly |
| CN208024660U (en) * | 2018-02-27 | 2018-10-30 | 上海威纳工程技术有限公司 | Hydraulic reciprocating cylinder sealing device |
| CN110296175A (en) * | 2019-07-19 | 2019-10-01 | 娄底市中兴液压件有限公司 | Pneumatic cylinder and vehicle |
| CN211501632U (en) * | 2019-12-19 | 2020-09-15 | 广州市阪上橡胶制品有限公司 | Novel SY type sealing member for reciprocating motion |
| CN211259200U (en) * | 2019-12-24 | 2020-08-14 | 四川欣悦精工科技有限公司 | Oil cylinder system for mold |
| CN212564387U (en) * | 2020-06-22 | 2021-02-19 | 中石化石油机械股份有限公司 | Piston sealing structure and sealing piece for hydraulic oscillator |
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| CN113217368A (en) | 2021-08-06 |
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Address after: 101320 No.27, Linhe Avenue, Shunyi District, Beijing (Science and technology innovation function zone) Applicant after: CCTEG Beijing Tianma Intelligent Control Technology Co.,Ltd. Applicant after: Shenhua Shendong Coal Group Corp.,Ltd. Address before: 101320 No.27, Linhe Avenue, Shunyi District, Beijing (Science and technology innovation function zone) Applicant before: BEIJING TIANDI-MARCO ELECTRO-HYDRAULIC CONTROL SYSTEM Co.,Ltd. Applicant before: Shenhua Shendong Coal Group Corp.,Ltd. |
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