CN117889081A - Gear pump with improved sealing performance - Google Patents
Gear pump with improved sealing performance Download PDFInfo
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- CN117889081A CN117889081A CN202311700454.5A CN202311700454A CN117889081A CN 117889081 A CN117889081 A CN 117889081A CN 202311700454 A CN202311700454 A CN 202311700454A CN 117889081 A CN117889081 A CN 117889081A
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- Prior art keywords
- sealing
- cavity
- seal
- motor shaft
- gear pump
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- 238000007789 sealing Methods 0.000 title claims abstract description 168
- 239000007788 liquid Substances 0.000 claims abstract description 44
- 230000005540 biological transmission Effects 0.000 claims abstract description 3
- 238000007906 compression Methods 0.000 claims description 19
- 230000006835 compression Effects 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 2
- 230000000670 limiting effect Effects 0.000 abstract description 12
- 230000002829 reductive effect Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 230000002411 adverse Effects 0.000 abstract description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The invention discloses a gear pump with improved sealing performance, which comprises a pump shell, a driving assembly, a motor assembly and a sealing assembly, wherein the pump shell is provided with a containing cavity, a liquid inlet channel, a liquid outlet channel and a shaft hole, wherein the liquid inlet channel, the liquid outlet channel and the shaft hole are communicated with the containing cavity, the driving assembly is arranged in the containing cavity and is used for driving liquid to flow into the containing cavity from the liquid inlet channel and flow out from the liquid outlet channel, the motor assembly comprises an end cover and a motor shaft extending out from the end cover, the motor shaft extends into the containing cavity from the shaft hole and is in transmission connection with the driving assembly, the sealing assembly comprises a sealing element and an elastic element, the sealing element is arranged on the periphery of the motor shaft in a surrounding manner and is used for sealing the shaft hole, and the elastic element elastically supports the sealing element so as to limit the sealing element. According to the invention, the elastic piece is used for limiting the sealing piece and absorbing vibration generated in the motor operation, so that adverse effects of the motor vibration on the sealing piece are reduced, the situations of loosening and sealing failure of the sealing ring are reduced, and the service life of the pump body is prolonged.
Description
Technical Field
The invention relates to the technical field of pump body sealing, in particular to a gear pump with improved sealing performance.
Background
The pump body mainly realizes the pumping of fluid through the volume change of the liquid inlet cavity and the liquid outlet cavity in the cavity when in operation, and particularly can adopt the motor shaft to drive the driving component in the cavity to move so as to achieve the purpose of driving the fluid to flow. The motor shaft typically extends into the cavity through a shaft hole formed in the pump housing.
In the prior art, a sealing ring can be sleeved outside a motor shaft to seal the shaft hole, however, vibration generated by the motor in operation is inevitably conducted to the sealing ring, and the sealing ring is often loosened and sealed to lose efficacy after the pump body is used for a long time, so that the service life of the pump body is influenced.
Disclosure of Invention
The invention mainly aims to provide a gear pump with improved sealing performance, and aims to solve the problem that a pump body in the prior art is easy to seal and lose efficacy due to vibration after being used for a long time.
In order to achieve the above purpose, the pump shell provided by the invention is provided with a containing cavity, and the pump shell is provided with a liquid inlet channel, a liquid outlet channel and a shaft hole which are communicated with the containing cavity;
the driving component is arranged in the containing cavity and used for driving liquid to flow into the containing cavity from the liquid inlet channel and flow out from the liquid outlet channel;
the motor assembly comprises an end cover and a motor shaft extending from the end cover, and the motor shaft extends into the accommodating cavity from the shaft hole and is in transmission connection with the driving assembly; the method comprises the steps of,
the sealing assembly comprises a sealing element and an elastic element, wherein the sealing element is arranged on the periphery of the motor shaft in a surrounding mode and used for sealing the shaft hole, and the elastic element elastically supports the sealing element so as to limit the sealing element.
In an embodiment, the pump casing has a casing plate facing the end cover, the casing plate is provided with the shaft hole, the elastic part comprises a compression spring extending along the axial direction, one end of the compression spring is elastically abutted against the sealing part, and the other end of the compression spring is connected with the motor assembly.
In an embodiment, the sealing member comprises a sleeve, a first sealing ring and a second sealing ring, wherein the sleeve is sleeved on the periphery of the motor shaft and is provided with a first end close to the shell plate and a second end close to the end cover, a sealing cavity is defined between the inner periphery of the sleeve and the periphery of the motor shaft, the sealing cavity is communicated with the containing cavity, the first sealing ring is arranged between the first end and the shell plate, the second sealing ring is arranged between the second end and the motor shaft, and the first sealing ring and the second sealing ring are used for jointly sealing the sealing cavity.
In an embodiment, a sealing groove is formed in one side, facing the end cover, of the shell plate, the sealing groove is arranged on the periphery of the shaft hole in a surrounding mode, an annular step is arranged at the first end of the sealing groove in an inserted mode, the first sealing groove is sleeved on the periphery of the annular step in a sleeved mode, and the first sealing groove abuts against the bottom wall and the side wall of the sealing groove.
In an embodiment, the sleeve is disposed at the second end in an open manner, and the second sealing ring is disposed in the sealing cavity and is sandwiched between an inner side wall of the sealing cavity and an outer periphery of the motor shaft.
In an embodiment, a bearing is arranged on the end cover, the motor shaft extends out of the bearing, a part of the bearing is inserted into the opening, and one side, facing away from the sealing cavity, of the second sealing ring is abutted to the bearing.
In an embodiment, the end side of the bearing facing the shell plate is provided with a gasket against which the second sealing ring is pressed.
In an embodiment, the first spacing groove has been seted up to the periphery side of bearing, the second spacing groove has been seted up to telescopic week side, first spacing groove with the second spacing groove extends along the axial respectively, seal assembly still including insert locate first spacing groove with the spacing post of second spacing groove.
In an embodiment, a bearing surface facing the end cover is arranged on the periphery of the sleeve in a surrounding manner, one end of the pressure spring is abutted against the bearing surface, and the other end of the pressure spring is abutted against the motor assembly.
In an embodiment, the end cover is provided with a bearing, the bearing is provided with an open slot facing the shell plate, the open slot is annularly arranged on the periphery of the motor shaft, and one end of the pressure spring, which is abutted to the motor assembly, is inserted into the open slot and is abutted to the bottom of the open slot.
In an embodiment, a third sealing ring is further sleeved on the motor shaft, and the third sealing ring is clamped between the inner periphery of the shaft hole and the outer periphery of the motor shaft.
In an embodiment, the elastic piece further comprises a clamp spring, the clamp spring extends along the circumferential direction and is in an annular arrangement with a notch, and the clamp spring is sleeved on the periphery of the sleeve and is connected with the motor assembly.
In an embodiment, the motor assembly further comprises a wall portion arranged between the shell plate and the end cover, the wall portion is arranged around the periphery of the sealing piece and connected with the end cover, a mounting groove extending along the circumferential direction is concavely formed in the inner periphery of the wall portion, and the outer portion Zhou Qian of the clamp spring is arranged in the mounting groove.
In an embodiment, the driving assembly comprises a driving gear and a driven gear which are meshed with each other, the motor shaft is connected with the driving gear in a key way, and the driving gear and the driven gear divide the containing cavity into a liquid inlet cavity adjacent to the liquid inlet channel and a liquid outlet cavity adjacent to the liquid outlet channel.
According to the technical scheme provided by the invention, the motor shaft of the pump body is sleeved with the sealing element for blocking the shaft hole, and the sealing element is elastically supported by the elastic element to realize limit. Therefore, on one hand, the elastic piece is utilized to realize reliable limit of the sealing piece, and meanwhile, the purpose that the sealing component is convenient to disassemble and assemble is achieved, on the other hand, the elastic piece can absorb vibration energy generated in motor work, adverse effect of motor vibration on the sealing piece is reduced, the situation that the sealing ring is loosened and the sealing is invalid is reduced, and therefore the service life of the pump body is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of an embodiment of a gear pump with improved sealing performance provided by the present invention;
FIG. 2 is a front view of the pump body of FIG. 1;
FIG. 3 is a cross-sectional view of the pump body of FIG. 2;
FIG. 4 is an enlarged schematic view of FIG. 3 at A;
FIG. 5 is an exploded perspective view of the pump body of FIG. 1;
FIG. 6 is a schematic perspective view of an embodiment of the sealing structure in FIG. 5;
fig. 7 is an exploded perspective view of the sealing structure of fig. 6.
Reference numerals illustrate:
1-a pump body; 10-a pump shell; 110-a cavity; 111-shaft holes; 11-shells; 12-sealing the groove; 20-a drive assembly; 21-a drive gear; 22-driven gear; 30-a motor assembly; 31-a motor shaft; 32-end caps; 33-bearings; 331-a gasket; 40-a seal assembly; 41-a seal; 410-sealing the cavity; 411-sleeve; 4111-first end; 4112-second end; 4113-annular step; 4114-bearing surface; 412-a first seal ring; 413-a second sealing ring; 42-elastic member; 421-compression spring; 422-snap springs; 43-limit posts; 431-a first limit groove; 432-a second limit groove; 50-wall portion; 51-mounting groove.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Referring to fig. 1 to 3, the present invention discloses a pump body 1, and in particular, provides a gear pump with improved sealing performance. Specifically, the pump body 1 includes a pump housing 10, a drive assembly 20, a motor assembly 30, and a seal assembly 40. The pump casing 10 is not limited in shape and material, and has a cavity 110, and the pump casing 10 has a liquid inlet channel, a liquid outlet channel and a shaft hole 111 communicating with the cavity 110. The driving assembly 20 is disposed in the pump housing 10, and is used for driving the liquid to flow into the cavity 110 from the liquid inlet channel and flow out from the liquid outlet channel. The specific structure of the driving assembly 20 may be set according to the type of the pump body 1, and may include, for example, two gears engaged with each other or an external gear ring and an internal gear engaged with each other, etc.
In this embodiment, the drive assembly 20 is driven in motion by a motor assembly 30. Specifically, the motor assembly 30 includes an end cover 32 and a motor shaft 31 extending from the end cover 32, where the motor shaft 31 extends from the shaft hole 111 into the cavity 110 and is in driving connection with the driving assembly 20, so that the driving assembly 20 can flow liquid, and the purpose of pumping the liquid is achieved. In one embodiment, the driving assembly 20 includes an impeller, and the motor shaft 31 is drivingly connected to the impeller to drive the impeller to rotate.
In another embodiment, referring to fig. 3, the driving assembly 20 includes a driving gear 21 and a driven gear 22 meshed with each other, the motor shaft 31 is keyed to the driving gear 21, and the driving gear 21 and the driven gear 22 divide the cavity 110 into a liquid inlet cavity adjacent to the liquid inlet channel and a liquid outlet cavity adjacent to the liquid outlet channel. When the motor shaft 31 rotates, the driving gear 21 and the driven gear 22 are driven to rotate, the volume of the liquid inlet cavity is reduced, liquid is sucked from the liquid inlet channel, the volume of the liquid outlet cavity is increased, and the liquid is discharged to the liquid outlet channel. In this embodiment, the pump body 1 is a gear pump, and has the advantages of simple structure and stable operation.
Further, with continued reference to fig. 3 and 4, the seal assembly 40 includes a seal 41 and an elastic member 42, where the seal 41 is disposed around the outer periphery of the motor shaft 31, and the structure may be various, so long as the structure can be used to seal the shaft hole 111, and the elastic member 42 elastically supports the seal 41 to limit the seal 41. The type of the elastic member 42 is not limited, and may be, for example, a compression spring 421, a coil spring, an elastic rubber pad, or the like. Preferably, the elastic member 42 has a structure capable of stably supporting the sealing member 41 without interfering with the rotation of the motor shaft 31. The elastic member 42 may elastically support the sealing member 41 in the axial direction to absorb vibration of the motor shaft 31 in the axial direction, and the elastic member 42 may elastically support the sealing member 41 in the radial direction to absorb vibration of the motor shaft 31 in the radial direction. In this embodiment, on the one hand, the elastic member 42 is utilized to realize reliable limiting of the sealing member 41, and meanwhile, the purpose of facilitating disassembly and assembly of the sealing assembly 40 is achieved, on the other hand, vibration energy generated in motor operation can be absorbed through the elastic member 42, adverse effects of motor vibration on the sealing member 41 are reduced, situations of loosening and sealing failure of the sealing ring are reduced, and therefore the service life of the pump body 1 is prolonged.
Specifically, referring to fig. 4 to 7, in one embodiment, the pump housing 10 has a housing plate 11 facing the end cap 32, and the housing plate 11 is provided with the shaft hole 111. The housing plate 11 may be integrally formed with the pump body 1 or may be assembled with the pump housing 10, as long as the sealing performance of the cavity 110 is maintained. The pump housing 10 is integrally formed, so that the cavity 110 has good sealing performance, and the assembly of the pump housing 10 to the cavity 110 is convenient for mounting the driving assembly 20 inside the cavity 110. In the present embodiment, the casing plate 11 is a part of the pump casing 10, and is provided with a shaft hole 111. The end cap 32 of the motor assembly 30 is axially spaced from the housing plate 11 with the motor shaft 31 extending from the end cap 32 through the shaft bore 111 past the seal assembly 40 and into the cavity 110.
The elastic member 42 includes a compression spring 421 extending along an axial direction, one end of the compression spring 421 is elastically abutted against the sealing member 41, and the other end is connected to the motor assembly 30. In this way, the compression spring 421 elastically presses the seal 41 against the shaft hole 111 in the direction extending from the end cap 32 toward the shell plate 11 to achieve the sealing effect. In this embodiment, the pump body 1 can be installed by sleeving the compression spring 421 and the sealing member 41 on the periphery of the motor shaft 31 one by one, and then installing the pump housing 10, so that the operation is simple. After the installation is finished, the elastic pressure of the pressure spring 421 reliably presses the sealing element 41 against the shaft hole 111 to seal the shaft hole 111, the pressure spring 421 can well absorb the vibration of the motor assembly 30 in the axial direction when the pump body 1 works, the shaking effect of the vibration of the motor assembly 30 on the sealing element 41 is reduced, the probability of loosening the sealing element 41 due to vibration is reduced, the sealing performance of the sealing assembly 40 is improved, and the service life of the pump body 1 is prolonged.
On the basis of the above embodiment, the sealing member 41 may be directly provided as a sealing ring which is accommodated in the shaft hole 111 and directly abuts against the compression spring 421. In this way, the seal ring is axially movable in the axial direction, but will cause leakage once released from the shaft hole 111, although the structure is simple.
To this end, in a preferred embodiment, the sealing member 41 includes a sleeve 411, a first sealing ring 412 and a second sealing ring 413, the sleeve 411 is sleeved on the outer periphery of the motor shaft 31 and has a first end 4111 close to the housing plate 11 and a second end 4112 close to the end cover 32, a sealing cavity 410 is defined between the inner periphery of the sleeve 411 and the outer periphery of the motor shaft 31, the sealing cavity 410 is communicated with the cavity 110, the first sealing ring 412 is disposed between the first end 4111 and the housing plate 11, the second sealing ring 413 is disposed between the second end 4112 and the motor shaft 31, and the first sealing ring 412 and the second sealing ring 413 are used for jointly sealing the sealing cavity 410. In the present embodiment, the sleeve 411 is directly contacted with the compression spring 421, and a sealing cavity 410 communicating with the cavity 110 is formed therein, and the first sealing ring 412 and the second sealing ring 413 are respectively disposed at two ends of the sleeve 411 in the axial direction, so as to seal the sealing cavity 410 from the two ends, respectively, to achieve a good sealing effect. By the arrangement, the sealing ring is prevented from being easily displaced and deformed in the axial direction due to direct contact of the pressure spring 421 and the sealing ring, so that sealing failure is avoided.
Based on the above embodiment, referring to fig. 4 to 7, a side of the shell 11 facing the end cover 32 has a sealing groove 12 annularly disposed on the outer periphery of the shaft hole 111, the first end 4111 is provided with an annular step 4113 inserted into the sealing groove 12, and the first sealing ring 412 is sleeved on the outer periphery of the annular step 4113 and abuts against the bottom wall and the side wall of the sealing groove 12. In this way, the first seal ring 412 is axially restrained by the sleeve 411, and is not easily moved or deformed in the axial direction. And the inner periphery, the upper side and the lower side of the first sealing ring 412 in the radial direction play a role in sealing, the sealing contact surface is larger, the sealing effect is better, when the hydraulic pressure in the sealing cavity 410 is increased, the first sealing ring 412 is tightly pressed against the shell plate 11, the sealing effect is enhanced, and the sealing performance of the sealing assembly 40 is improved.
In an embodiment, referring to fig. 4, the sleeve 411 is disposed at the second end 4112 with an opening, and the second sealing ring 413 is disposed in the sealing cavity 410 and is sandwiched between an inner side wall of the sealing cavity 410 and an outer periphery of the motor shaft 31. In this embodiment, the sleeve 411 plays a role in tightening the second seal ring 413, and enhances the sealing performance of the second seal ring 413. The sleeve 411 is preferably made of rubber or silica gel having a certain elasticity, and thus, plays a role of increasing friction resistance to the second seal 413 and reducing rotation of the second seal 413 along with the motor shaft 31. Preferably, the sleeve 411 may be made of graphite or metal with good heat conductivity, so as to reduce the temperature rise caused by friction to the second sealing ring 413 when the motor shaft 31 rotates, and improve the service life of the second sealing ring 413.
Further, as shown in fig. 4 to 7, the end cover 32 is provided with a bearing 33, the motor shaft 31 extends from the bearing 33, a portion of the bearing 33 is inserted into the opening, and a side of the second sealing ring 413 facing away from the sealing cavity 410 abuts against the bearing 33. In the present embodiment, the second seal ring 413 is supported in the axial direction by the bearing 33 toward the end side of the shell plate 11, which plays a role of limiting the second seal ring 413 in the axial direction, and when the hydraulic pressure in the seal chamber 410 increases, the second seal ring 413 can be pressed more tightly against the bearing 33, further enhancing the sealing performance of the second seal ring 413 by the hydraulic pressure.
Optionally, a spacer 331 is provided on the end side of the bearing 33 facing the shell plate 11, and the second seal 413 is pressed against the spacer 331. In this way, the gasket 331 on the one hand plays a role in making the contact surface between the bearing 33 and the second sealing ring 413 smooth, avoiding the abrasion of the second sealing ring 413, on the other hand, also plays a role in heat conduction, reducing the frictional heating generated by the relative rotation of the second sealing ring 413 on the motor shaft 31, and prolonging the service life of the second sealing ring 413.
On the basis of the above embodiment, as shown in fig. 4 to 7, the outer circumferential side of the bearing 33 is provided with a first limiting groove 431, the circumferential side of the sleeve 411 is provided with a second limiting groove 432, the first limiting groove 431 and the second limiting groove 432 extend along the axial direction, and the sealing assembly 40 further includes a limiting post 43 inserted into the first limiting groove 431 and the second limiting groove 432. In this embodiment, the limit of the sleeve 411 in the circumferential direction is realized by using the cooperation of the limit post 43 and the first limit groove 431 and the second limit groove 432, so as to prevent the sleeve 411 from rotating relative to the bearing 33 in the circumferential direction, so as to improve the sealing performance of the sealing member 41. Meanwhile, the first limiting groove 431 and the second limiting groove 432 are elongated and extend along the axial direction along the length direction, so that the elastic supporting effect of the pressure spring 421 in the axial direction is not affected.
On the basis of the above embodiment, the outer circumference of the sleeve 411 is provided with a bearing surface 4114 facing the end cover 32, one end of the compression spring 421 abuts against the bearing surface 4114, and the other end abuts against the motor assembly 30. The sleeve 411 thus acts as a guide, so that the compression spring 421 is compressed in the axial direction.
Further, the end cover 32 is provided with a bearing 33, the bearing 33 has an open groove (not shown) facing the shell plate 11, the open groove is annularly arranged on the periphery of the motor shaft 31, and the pressure spring 421 abuts against one end of the motor assembly 30, is inserted into the open groove, and abuts against the bottom of the open groove. In this way, the opening groove is used to further guide the compression spring 421, so as to avoid the compression spring 421 from being deviated.
Optionally, a third sealing ring (not shown in the drawing) is further sleeved on the motor shaft 31, and the third sealing ring is sandwiched between the inner periphery of the shaft hole 111 and the outer periphery of the motor shaft 31. Thus, the dual sealing function is achieved on the shaft hole 111, after the sealing failure of the third sealing ring, the first sealing ring 412 and the second sealing ring 413 continue to achieve the sealing function, the sealing performance of the pump body 1 is enhanced, and the service life of the pump body 1 is prolonged.
With continued reference to fig. 4 and 5, the elastic member 42 further includes a clamp spring 422, where the clamp spring 422 is in a ring shape with a notch and extends along a circumferential direction, and the clamp spring 422 is sleeved on the outer periphery of the sleeve 411 and is connected to the motor assembly 30. In this embodiment, the elastic member 42 further includes a clamp spring 422, where the clamp spring 422 elastically supports the sealing member 41 in a radial direction to absorb the vibration action of the motor in the radial direction, so as to further improve the vibration resistance of the sealing member 41 and reduce the probability of sealing failure caused by loosening of the vibration.
Based on the above embodiment, the motor assembly 30 further includes a wall portion 50 disposed between the shell plate 11 and the end cover 32, the wall portion 50 is disposed around the outer periphery of the seal member 41 and is connected to the end cover 32, a mounting groove 51 extending along the circumferential direction is concavely formed in the inner periphery of the wall portion 50, and the outer portion Zhou Qian of the snap spring 422 is disposed in the mounting groove 51. In this embodiment, the sleeve 411 is firmly supported by fixing the support clip 422 in the radial direction by the annular mounting groove 51 formed in the wall 50. Preferably, screw holes and/or studs for mounting the pump body 1 may also be provided on the wall 50.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (13)
1. A gear pump with improved sealing performance, comprising:
the pump shell is provided with a containing cavity, and the pump shell is provided with a liquid inlet channel, a liquid outlet channel and a shaft hole which are communicated with the containing cavity;
the driving component is arranged in the containing cavity and used for driving liquid to flow into the containing cavity from the liquid inlet channel and flow out from the liquid outlet channel;
the motor assembly comprises an end cover and a motor shaft extending from the end cover, and the motor shaft extends into the accommodating cavity from the shaft hole and is in transmission connection with the driving assembly; the method comprises the steps of,
the sealing assembly comprises a sealing element and an elastic element, wherein the sealing element is arranged on the periphery of the motor shaft in a surrounding mode and used for sealing the shaft hole, and the elastic element elastically supports the sealing element so as to limit the sealing element.
2. The gear pump with improved sealing performance according to claim 1, wherein the pump housing is provided with a housing plate facing the end cover, the housing plate is provided with the shaft hole, the elastic piece comprises a compression spring extending along the axial direction, one end of the compression spring is elastically abutted against the sealing piece, and the other end of the compression spring is connected with the motor assembly.
3. The improved seal gear pump of claim 2 wherein said seal member comprises a sleeve, a first seal ring and a second seal ring, said sleeve being disposed about the outer periphery of said motor shaft and having a first end adjacent said housing plate and a second end adjacent said end cap, a seal cavity being defined between the inner periphery of said sleeve and the outer periphery of said motor shaft, said seal cavity being in communication with said cavity, said first seal ring being disposed between said first end and said housing plate, said second seal ring being disposed between said second end and said motor shaft, said first seal ring and said second seal ring being adapted to co-seal said seal cavity.
4. The gear pump with improved sealing performance according to claim 3, wherein one side of the shell plate facing the end cover is provided with a sealing groove which is annularly arranged on the periphery of the shaft hole, the first end is provided with an annular step which is inserted into the sealing groove, and the first sealing ring is sleeved on the periphery of the annular step and is abutted against the bottom wall and the side wall of the sealing groove.
5. The gear pump of claim 3, wherein the sleeve is open at the second end, and the second seal ring is disposed within the seal cavity and sandwiched between an inner sidewall of the seal cavity and an outer periphery of the motor shaft.
6. The gear pump with improved sealing performance according to claim 5, wherein a bearing is arranged on the end cover, the motor shaft extends out of the bearing, a part of the bearing is inserted into the opening, and one side of the second sealing ring, which is opposite to the sealing cavity, is abutted against the bearing.
7. The improved seal gear pump of claim 6, wherein an end side of said bearing facing said housing plate is provided with a gasket against which said second seal ring is pressed.
8. The gear pump of claim 6, wherein the bearing has a first limit groove formed in an outer circumferential side thereof, a second limit groove formed in a circumferential side thereof, the first limit groove and the second limit groove extending in an axial direction, and the seal assembly further comprises a limit post inserted into the first limit groove and the second limit groove.
9. A gear pump with improved sealing performance according to claim 3, wherein the outer circumference of the sleeve is provided with a bearing surface facing the end cover, one end of the compression spring is abutted against the bearing surface, and the other end is abutted against the motor assembly.
10. The gear pump with improved sealing performance according to claim 9, wherein a bearing is arranged on the end cover, the bearing is provided with an open groove facing the shell plate, the open groove is annularly arranged on the periphery of the motor shaft, and the pressure spring is abutted against one end of the motor assembly, inserted into the open groove and abutted against the bottom of the open groove.
11. The gear pump with improved sealing performance according to claim 3, wherein the elastic piece further comprises a clamp spring, the clamp spring is in an annular arrangement extending along the circumferential direction and provided with a notch, and the clamp spring is sleeved on the periphery of the sleeve and connected with the motor assembly.
12. The enhanced seal gear pump of claim 11 wherein said motor assembly further comprises a wall portion disposed between said housing plate and said end cap, said wall portion being disposed around the periphery of said seal member and connecting said end cap, said wall portion having a circumferentially extending mounting groove recessed in the inner periphery thereof, said snap spring having an outer portion Zhou Qian disposed in said mounting groove.
13. A gear pump with improved sealing performance according to any one of claims 1 to 12, wherein the drive assembly comprises a driving gear and a driven gear meshed with each other, the motor shaft is in key connection with the driving gear, and the driving gear and the driven gear divide the cavity into a liquid inlet cavity adjacent to the liquid inlet channel and a liquid outlet cavity adjacent to the liquid outlet channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311700454.5A CN117889081A (en) | 2023-12-12 | 2023-12-12 | Gear pump with improved sealing performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311700454.5A CN117889081A (en) | 2023-12-12 | 2023-12-12 | Gear pump with improved sealing performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117889081A true CN117889081A (en) | 2024-04-16 |
Family
ID=90640102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311700454.5A Pending CN117889081A (en) | 2023-12-12 | 2023-12-12 | Gear pump with improved sealing performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117889081A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3735351A1 (en) * | 1986-10-17 | 1988-04-21 | Sihi Gmbh & Co Kg | Centrifugal pump |
| WO2008141377A1 (en) * | 2007-05-18 | 2008-11-27 | Apc Company Pty Ltd | Seal assembly |
| EP2400159A1 (en) * | 2010-06-25 | 2011-12-28 | Walrus Pump Co., Ltd. | Sealing device for a pump |
| CN104074741A (en) * | 2013-03-26 | 2014-10-01 | 德昌电机(深圳)有限公司 | Fluid pump |
| CN206129596U (en) * | 2016-10-26 | 2017-04-26 | 杭州好达威机电有限公司 | Gear pump |
| CN106996387A (en) * | 2016-01-26 | 2017-08-01 | 格兰富控股联合股份公司 | Centrifugal pump |
| CN114352534A (en) * | 2021-12-21 | 2022-04-15 | 昆山奥兰克泵业制造有限公司 | Pump structure |
-
2023
- 2023-12-12 CN CN202311700454.5A patent/CN117889081A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3735351A1 (en) * | 1986-10-17 | 1988-04-21 | Sihi Gmbh & Co Kg | Centrifugal pump |
| WO2008141377A1 (en) * | 2007-05-18 | 2008-11-27 | Apc Company Pty Ltd | Seal assembly |
| EP2400159A1 (en) * | 2010-06-25 | 2011-12-28 | Walrus Pump Co., Ltd. | Sealing device for a pump |
| CN104074741A (en) * | 2013-03-26 | 2014-10-01 | 德昌电机(深圳)有限公司 | Fluid pump |
| CN106996387A (en) * | 2016-01-26 | 2017-08-01 | 格兰富控股联合股份公司 | Centrifugal pump |
| CN206129596U (en) * | 2016-10-26 | 2017-04-26 | 杭州好达威机电有限公司 | Gear pump |
| CN114352534A (en) * | 2021-12-21 | 2022-04-15 | 昆山奥兰克泵业制造有限公司 | Pump structure |
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