CN213298368U - Mechanical sealing device for hot water pump - Google Patents
Mechanical sealing device for hot water pump Download PDFInfo
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- CN213298368U CN213298368U CN202021975403.5U CN202021975403U CN213298368U CN 213298368 U CN213298368 U CN 213298368U CN 202021975403 U CN202021975403 U CN 202021975403U CN 213298368 U CN213298368 U CN 213298368U
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Abstract
The utility model provides a mechanical seal device for hot-water pump belongs to the mechanical seal field, can solve the problem that the mechanical seal cooling effect of current hot-water pump is not good. A gland bush of the mechanical sealing device is sleeved on the shaft sleeve and is axially fixed on the pump cover; the pumping ring is sleeved on the shaft sleeve and fixed; the outer wall of the pumping ring is circumferentially limited on the inner wall of the gland; the pumping ring is provided with a first annular groove, and the movable ring is arranged in the first annular groove and fixedly connected with the pumping ring; the static ring assembly is fixedly connected with the gland, and two ends of the elastic piece are abutted between the static ring assembly and the gland so that the end face of the static ring assembly is always attached to the end face of the movable ring; the axis of the first input port on the gland is vertical to the axis of the shaft sleeve and is communicated with the first annular groove; the axis of the first output port and the axis of the shaft sleeve form a preset angle; the second ring groove communicates the first output port with the position of the pumping ring where the notch is formed. The utility model is used for improve the mechanical seal's of hot-water pump cooling effect.
Description
Technical Field
The utility model relates to a mechanical seal technical field especially relates to a mechanical seal device for hot-water pump.
Background
In the industries of electric power, petroleum, chemical industry and the like, a high-temperature high-pressure hot water pump is important equipment for conveying high-temperature high-pressure deoxygenated water. During operation of the hot water pump, a sealing device is required between the pump housing and the shaft in order to prevent the medium from directly flowing out of the pump housing. A commonly used sealing method for a hot water pump is mechanical sealing. In practice, if the heat energy of the medium in the sealing cavity of the mechanical seal of the hot water pump is not timely dissipated, the overall temperature inside the sealing cavity is increased, so that the saturated vapor pressure of the medium exceeds the tolerable value, the heat crack of the sealing end face, the vaporization of the end face liquid film, the aging and abrasion of auxiliary elements are aggravated, and the mechanical seal is finally disabled.
The mechanical seal of the existing hot water pump realizes the cooling in the seal cavity through external circulation, and the cooling effect is not good.
Disclosure of Invention
An object of the utility model is to provide a mechanical seal device for hot-water pump can solve the not good problem of mechanical seal cooling effect of current hot-water pump.
Realize the utility model discloses the technical scheme of purpose as follows:
the embodiment of the utility model provides a mechanical sealing device for a hot water pump, which comprises a gland, a static ring component, a movable ring, a pumping ring and an elastic part; the gland bush is sleeved on the shaft sleeve and is axially fixed on the pump cover through a fixing piece; the pumping ring is sleeved on the shaft sleeve and is fixed with the shaft sleeve; the outer wall of the pumping ring is circumferentially limited on the inner wall, close to the pump cover, of the gland; a first annular groove is formed in the inner wall of one end, far away from the pump cover, of the pumping ring, and a movable ring is arranged in the first annular groove and fixedly connected with the pumping ring; the static ring assembly is fixedly connected with the gland, and two ends of the elastic element are abutted between the static ring assembly and the gland, so that the end face of the static ring assembly is always attached to the end face of the movable ring; the pressure cover is provided with a first ring groove, a second ring groove, a first input port and a first output port; the axis of the first input port is vertical to the axis of the shaft sleeve and is communicated with the first annular groove; the axis of the first output port and the axis of the shaft sleeve form a preset angle; and the second ring groove is used for communicating the first output port with the position of the pumping ring, which is provided with the notch.
Optionally, the gland comprises an outer gland and an inner gland; the outer gland is sleeved on the shaft sleeve, the inner gland is arranged between the outer gland and the pump cover, and the outer wall of the pumping ring is axially limited on the inner wall of the inner gland; the first ring groove, the first input port and the first output port are arranged on the outer gland; a second annular groove is formed in one end, close to the inner gland, of the outer gland, and a third annular groove is formed in one end, close to the outer gland, of the inner gland; the second annular groove and the third annular groove are matched to form the second annular groove.
Optionally, the stationary ring assembly includes a stationary ring seat, a stationary ring support frame and a stationary ring; a fourth annular groove is formed in the inner wall of one end, close to the movable ring, of the static ring seat; the static ring is arranged in the fourth annular groove after being sleeved on the static ring supporting frame, and the outer side wall of the static ring is abutted against the inner wall of the fourth annular groove; the end surface of the static ring is always attached to the end surface of the dynamic ring; the static ring seat is fixedly connected with the gland, and two ends of the elastic piece are abutted between the static ring seat and the gland.
Optionally, the stationary ring is a graphite ring.
Optionally, a fifth annular groove is formed in an outer wall of one end, close to the moving ring, of the stationary ring.
Optionally, a sixth annular groove is formed in the inner wall of one end, far away from the moving ring, of the static ring; a first annular boss matched with the sixth annular groove is arranged on the outer wall, close to the static ring, of the static ring support frame; the sixth annular groove is disposed on the first annular boss.
Optionally, 3 to 4 third ring grooves are formed in the position of the gland for circumferentially limiting the outer wall of the pumping ring; a gap of 0.3 mm-0.5 mm is arranged between the gland and the pumping ring.
Optionally, a second annular boss is arranged at one end of the pumping ring close to the second ring groove; the second annular boss is provided with bevel grooves at equal intervals; the bottom surface of bevel connection groove with the axis of pumping ring is preset the acute angle, just the bottom surface runs through the annular boss of second.
Optionally, a half slot is arranged between adjacent bevel slots; the semi-open groove extends from the end surface of the second annular boss to the bottom surface and does not penetrate through the bottom surface.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a pair of a mechanical seal device for hot-water pump, through with pumping ring and rotating ring fixed connection after again with axle sleeve fixed connection, when the pump shaft rotates, can drive the axle sleeve and rotate to drive pumping ring and rotating ring and rotate. Quiet ring subassembly and gland fixed connection to the rotating ring can rotate quiet ring subassembly relatively, and the setting of elastic component can make the terminal surface of quiet ring subassembly laminate with the terminal surface of rotating ring all the time. When the cooling device works, the first input port, the first annular groove and the movable ring which are arranged on the gland are matched for use, so that pressure balance can be achieved, the first output port, the second annular groove and the pumping ring are matched for use, an effective volute effect can be achieved, and therefore cooling liquid can continuously circulate in the sealing cavity. Compare in the mechanical seal of current hot-water pump and realize the cooling in the sealed cavity through the extrinsic cycle, the utility model discloses on the basis of extrinsic cycle, still improved mechanical seal's internal circulation to mechanical seal's cooling effect is better.
Drawings
Fig. 1 is a schematic structural diagram of a mechanical sealing device for a hot water pump according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a stationary ring assembly according to an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 1 at A;
fig. 4 is a cross-sectional view of a pumping ring provided by an embodiment of the present invention;
fig. 5 is a perspective view of a pumping ring provided by an embodiment of the present invention.
Icon: 1-a fixing piece; 2-a stationary ring assembly; 21-stationary ring; 211-fifth annular groove; 22-stationary ring support; 221-a first annular boss; 23-stationary ring seat; 3-pressing the cover; 31-front gland; 311-a first ring groove; 312-a second ring groove; 313-a first input port; 314-a first output port; 315-second input port; 316-second output port; 32-rear gland; 321-a third ring groove; 4-moving ring; 41-a first annular groove; 42-a second annular boss; 421-bevel groove; 422-half slotting; 5-a pumping ring; 6-an elastic member; 7-shaft sleeve; 8-pump cover.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that the functions, methods, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
In the description of the present embodiments, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
Referring to fig. 1, fig. 1 is a schematic structural view of a mechanical sealing device for a hot water pump according to the present invention. The mechanical sealing device for the hot water pump comprises a gland 3, a static ring component 2, a movable ring 4, a pumping ring 5 and an elastic piece 6. The gland 3 is sleeved on the shaft sleeve 7 and is axially fixed on the pump cover 8 through the fixing piece 1. The inner wall of the gland 3 and the outer wall of the shaft sleeve 7 form a sealing cavity of the mechanical sealing device. The fixing part 1 can be a stud and a nut, the front end of the bolt penetrates through the gland 3 and then is fixed on the pump cover 8, and the nut is sleeved at the rear end of the bolt.
The pumping ring 5 is sleeved on the shaft sleeve 7 and fixed with the shaft sleeve 7, generally fixed by a cylindrical head set screw, and the axial positions of the pumping ring 5 and the shaft sleeve 7 are positioned by two positioning pins, so that the connection strength of the pumping ring 5 and the shaft sleeve 7 and the axial positioning of the pumping ring 5 are enhanced, and further when the pump works, the pump drives the shaft sleeve 7 to rotate, and the shaft sleeve 7 can drive the pumping ring 5 to rotate around the axis of the shaft sleeve 7.
The outer wall of the pumping ring 5 is circumferentially limited on the inner wall of the gland 3 close to the pump cover 8. The inner wall of one end, far away from the pump cover 8, of the pumping ring 5 is provided with a first annular groove 41, and the movable ring 4 is arranged in the first annular groove 41 and is fixedly connected with the pumping ring 5. Generally, the pumping ring 5 is connected with the moving ring 4 through four set screws to transmit power, so that the moving ring 4 does not rotate relative to the pumping ring 5, and the moving ring 4 is fixedly connected with the pumping ring 5, and the pumping ring 5 is fixedly connected with the shaft sleeve 7, so that when the pump works, the pump drives the shaft sleeve 7 to rotate, and the shaft sleeve 7 can drive the pumping ring 5 and the moving ring 4 to rotate along the axis of the shaft sleeve 7, so that the forced circulation of cooling liquid can be realized. In practical application, the end face of the joint of the movable ring 4 and the pumping ring 5 is provided with tetrafluoroethylene material, and the tetrafluoroethylene material is favorable for installing a sealing ring between the pumping ring 5 and the movable ring 4.
This elastic component 6 sets up in the outside of rotating ring 4 and quiet ring subassembly 2 to elastic component 6 does not rotate along with the rotation of pump shaft, can make this elastic component 6 stable good, and then better to the compensation effect of 2 axial motion of quiet ring subassembly, makes quiet ring subassembly 2 better laminate mutually with rotating ring 4.
The fixed connection mode of the stationary ring component 2 and the gland 3 can be as follows: as shown in fig. 1, a fixing member mounting hole is formed in an inner wall of the gland 3 close to the stationary ring assembly 2, a through hole is formed in the stationary ring assembly 2, and the front end of the fixing member 1 is fixed in the fixing member mounting hole after passing through the through hole. Wherein the fixing member 1 may include two rotation-preventing pins. With continued reference to fig. 1, the manner in which the two ends of the elastic element 6 are abutted between the stationary ring component 2 and the gland 3 may be: an elastic piece mounting hole is further formed in the inner wall, close to the stationary ring component 2, of the gland 3, one end of the elastic piece 6 abuts against the bottom of the elastic piece mounting hole, and the other end of the elastic piece abuts against the end face, close to the gland 3, of the stationary ring component 2. The elastic member 6 may be a compression spring or a rubber spring. When the spring is a compression spring, the spring with the larger outer diameter is adopted, so that the compression spring can be ensured to have certain stability, and the uniform distribution of the circumferential elasticity can be ensured, so that the mechanical sealing device can be normally used under a high-pressure working condition.
The gland 3 is provided with a first annular groove 311, a second annular groove 312, a first inlet 313 and a first outlet 314. The first input port 313 has an axis perpendicular to that of the hub 7 for inputting washing water, and communicates with the first ring groove 311. The first input port 313, the first ring groove 311 and the rotating ring 4 are used in cooperation, so that pressure balance can be achieved.
The axis of the first outlet 314 is at a predetermined angle with respect to the axis of the shaft sleeve 7 for discharging the washing water, and the second annular groove 312 connects the first outlet 314 with the position of the pumping ring 5 where the notch is formed, and the position of the pumping ring 5 where the notch is formed is generally located opposite to the center line of the first outlet 314.
In this case, according to actual needs, a person skilled in the art can set the size of the preset angle, as shown in fig. 1, the axis of the shaft sleeve 7 is taken as a starting edge of the preset angle, the axis of the first output port 314 is taken as a final edge of the preset angle, and the preset angle may be 135 °. The first outlet 314, the second ring groove 312 and the pumping ring 5 cooperate to achieve an effective volute effect.
The embodiment of the utility model provides a pair of mechanical seal device for hot-water pump, through with pumping ring 5 with 4 fixed connection of rotating ring after again with axle sleeve 7 fixed connection, when the pump shaft rotates, can drive axle sleeve 7 and rotate to drive pumping ring 5 and rotating ring 4 and rotate. Quiet ring subassembly 2 and gland 3 fixed connection to quiet ring subassembly 2 rotates relatively for rotating ring 4, and the setting up of elastic component 6 can make the terminal surface of quiet ring subassembly 2 laminate with the terminal surface of rotating ring 4 all the time. When the cooling device works, the first input port 313, the first annular groove 311 and the moving ring 4 which are arranged on the gland 3 are matched for use, so that pressure balance can be achieved, the first output port 314, the second annular groove 312 and the pumping ring 5 are matched for use, an effective volute effect can be achieved, and therefore cooling liquid can continuously circulate in the sealing cavity. Compare in the mechanical seal of current hot-water pump and realize the cooling in the sealed cavity through the extrinsic cycle, the utility model discloses on the basis of extrinsic cycle, still improved mechanical seal's internal circulation to mechanical seal's cooling effect is better.
As shown in fig. 1, the gland 3 includes an outer gland 31 and an inner gland 32. The outer gland 31 is sleeved on the shaft sleeve 7, and the inner gland 32 is arranged between the outer gland 31 and the pump cover 8. When the fixing member 1 is a bolt and a nut, the front end of the bolt sequentially penetrates through the outer gland 31 and the inner gland 32 and then is fixed on the pump cover 8, and the rear end of the bolt is sleeved with the nut, so that the gland 3 is axially fixed on the pump cover 8 through the fixing member 1.
The outer wall of the pumping ring 5 is axially limited on the inner wall of the inner gland 3; the first ring groove 311, the first input port 313 and the first output port 314 are disposed on the outer gland 3. A second annular groove is formed in one end, close to the inner gland 3, of the outer gland 3, and a third annular groove is formed in one end, close to the outer gland 3, of the inner gland 3; the second annular groove and the third annular groove cooperate to form the second annular groove 312, that is, when the fixing member 1 fixes the outer gland 31 and the inner gland 32, the second annular groove 312 is formed by the second annular groove and the third annular groove.
In practical application, the gland 3 is provided with the outer gland 3 and the inner gland 3, so that the assembly of the whole mechanical sealing device can be facilitated.
As shown in fig. 1 and 2, the stationary ring assembly 2 includes a stationary ring seat 23, a stationary ring support bracket 22, and a stationary ring 21. A fourth annular groove is formed in the inner wall of one end, close to the movable ring 4, of the static ring seat 23; after the quiet ring 21 cover was located quiet ring support frame 22, installed in fourth annular groove, and the lateral wall of quiet ring 21 supports in the inner wall of fourth annular groove to the structural design who makes quiet ring subassembly 2 is interior outer mosaic form, and then makes the intensity of quiet ring subassembly 2 obtain very big promotion. The stationary ring seat 23 is generally made of stainless steel, and the inner diameter of the fourth annular groove of the stationary ring seat 23 is in interference fit with the outer wall of the stationary ring 21, so that the stationary ring 21 is more firmly mounted. The end face of the static ring 21 is always attached to the end face of the movable ring 4, so that the sealing effect is better.
The stationary ring seat 23 is fixedly connected with the gland 3, and two ends of the elastic element 6 are abutted between the stationary ring seat 23 and the gland 3. Specifically, the inner wall of the gland 3, which is close to the stationary ring seat 23, is provided with a fixing member mounting hole, the stationary ring seat 23 is provided with a through hole, and the front end of the fixing member 1 is fixed in the fixing member mounting hole after passing through the through hole, so that the stationary ring seat 23 and the gland 3 are fixedly connected. An elastic piece mounting hole is further formed in the inner wall, close to the stationary ring seat 23, of the gland 3, one end of the elastic piece 6 abuts against the bottom of the elastic piece mounting hole, the other end of the elastic piece abuts against the end face, close to the gland 3, of the stationary ring seat 23, and therefore the two ends of the elastic piece 6 abut against between the stationary ring seat 23 and the gland 3.
In practical application, because the terminal surface of laminating mutually of quiet ring subassembly 2 and rotating ring 4 is easy wearing and tearing part, compare in current quiet ring subassembly 2 a body structure, the quiet ring seat 23 is made into with quiet ring subassembly 2 to this embodiment, the components of a whole that can function independently structure of quiet ring support frame 22 and quiet ring 21, when quiet ring 21 was worn and torn, only need to trade quiet ring 21 can, need not all trade quiet ring subassembly 2 to mechanical seal device's cost has been practiced thrift.
Optionally, the stationary ring 21 is a graphite ring. The graphite ring has better lubricating effect, and the movable ring 4 can rotate more smoothly relative to the static ring 21.
In practical application, as shown in fig. 2, the outer wall of the stationary ring 21 near one end of the movable ring 4 is provided with a fifth annular groove 211. When the pressure of the gas or the liquid on the end surface and the side wall of the stationary ring component 2 close to the moving ring 4 is increased, the end surface of the fifth annular groove 211 and the end surface of the stationary ring seat 23 are simultaneously pressurized, so that the stationary ring 21 and the stationary ring seat 23 move together in the direction away from the moving ring 4, and the stationary ring 21 is not easy to fall off.
With continued reference to fig. 2, a sixth annular groove is formed on the inner wall of the end of the stationary ring 21 away from the movable ring 4; a first annular boss 221 matched with the sixth annular groove is arranged on the outer wall of the static ring support frame 22 close to the static ring 21; the sixth annular groove is disposed on the first annular protrusion 221. Thus when the pressure of the end face and the side wall of the static ring component 2 close to the moving ring 4 is increased by gas or liquid, the end face of the first annular boss 221 close to the static ring 21 and the end face of the static ring seat 23 are simultaneously pressurized, so that the static ring support frame 22, the static ring seat 23 and the static ring 21 move together in the direction away from the moving ring 4, and the static ring 21 is not easy to fall off from the static ring support frame 22. In practical application, the stationary ring support frame 22 is made of stainless steel with good strength, and the wall thickness and the height of the first annular boss 221 are both 2 mm.
As shown in fig. 3, the position of the inner wall of the circumferential limiting pumping ring 5 of the gland 3 is provided with 3-4 third ring grooves 321, specifically, the third ring grooves 321 are arranged at the position of the inner wall of the circumferential limiting pumping ring 5 of the inner gland 3, so that labyrinth sealing can be formed, a damping flow state is formed at the position of the hot fluid entering the sealing cavity, the hot fluid in the pump cavity is prevented from entering the sealing cavity of the mechanical sealing device, the temperature in the sealing cavity is prevented from being excessively high, and a good environment is provided for circulation of the cooling fluid in the mechanical sealing device. In practical application, the distance between the inner end surface of the inner gland 3 adjacent to the third ring groove 321 and the end surface of the inner gland 3 close to the pump cover 8 is 8 mm-12 mm, so that the position and the width of the third ring groove 321 are better designed.
Meanwhile, a gap of 0.3 mm-0.5 mm is arranged between the gland 3 and the pumping ring 5, so that the situation that cooling liquid cannot circulate due to the fact that a vacuum state is formed in a sealing cavity of the mechanical sealing device can be prevented.
As shown in fig. 4 and 5, one end of the pumping ring 5 close to the second annular groove 312 is provided with a second annular boss 42, and bevel grooves 421 are equidistantly distributed on the second annular boss 42; the bottom surface of the bevel groove 421 and the axis of the pumping ring 5 form a preset acute angle, and the bottom surface penetrates through the second annular boss 42. Wherein, according to the actual requirement, the skilled person sets the angle of the preset acute angle, which is generally 45 °, that is, the bevel of the bevel groove 421 is 45 °. The bevel groove 421 is provided to enable a large flow rate of coolant to be delivered.
With continued reference to fig. 4 and 5, a half slot 422 is disposed between adjacent bezel slots 421; the half slot 422 extends from the end face of the second annular ledge 42 to the bottom face and does not extend through the bottom face. The semi-open slots 422 are arranged to make the centrifugal force of the cooling fluid stronger.
When the pumping ring 5 has the bevel groove 421 and the half slot 422, the flow field generated by the pumping ring 5 can compensate the situation that the sealing end face of the static ring 21 and the movable ring 4 which cannot be washed due to the arrangement of the internal structure of the mechanical sealing device is not attached to each other, and the pumping ring 5 can enable bubbles generated in the circulation process to be forcibly thrown into the second ring groove 312 and the first output port 314 under the action of centrifugal force and then be discharged, so that the vaporization phenomenon of the sealing end face is not easily caused, and the sealing failure caused by the vaporization of the sealing end face in the hot water conveying process is further inhibited.
In practical applications, the outer gland 3 is further provided with a second input port 315 and a second output port 316 for quenching and draining in emergency situations.
As shown in fig. 1, sealing rings are further disposed at the joints between the components of the mechanical sealing device for sealing, thereby preventing leakage. Specifically, seal rings are provided between the front and rear glands 31 and 32, respectively, and between the rear gland 32 and the pump cover 8, respectively, so as to prevent the coolant from leaking radially. Sealing rings are respectively arranged between the front gland 31 and the shaft sleeve 7, between the static ring seat 23 and the front gland 31, between the outer side wall of the movable ring 4 and the inner wall of the first annular groove 41 of the pumping ring 5, between the pumping ring 5 and the shaft sleeve 7, and between the shaft sleeve 7 and the pump shaft, so that the axial leakage of the cooling liquid is prevented.
When the mechanical seal is used for conveying liquid, a liquid film layer is generated on the sealing end face of the static ring 21 and the movable ring 4 which are jointed by the mechanical seal. However, for the high-temperature and high-pressure superheated water, when the temperature rises, the self-lubricity thereof is reduced, and when the high-temperature and high-pressure superheated water flows through the sealing end face rotating at high speed, an effective liquid film layer cannot be formed, so that the high-temperature and high-pressure superheated water flows out. The embodiment of the utility model provides a hot-fluid that reduces hot water through labyrinth seal and forms gets into sealed chamber, and on the basis of external circulation, improves mechanical seal's inner loop to make mechanical seal's cooling effect better, and then make the seal end face can produce the liquid film layer all the time, sealed effect has obtained great improvement.
The embodiment of the utility model provides a mechanical seal device for hot-water pump can satisfy API 682 "the pump-bearing seal system that is used for centrifugal pump and rotary pump" and JB/T6614-2011 "mechanical seal technical condition for boiler feed water pump" and JB/T4127.1-2013 "mechanical seal technical condition" requirement. The high-temperature high-pressure water pump is suitable for long-time use of high-temperature high-pressure water pumps such as boiler feed pumps with the temperature of less than or equal to 270 ℃ and the delivery pressure of less than or equal to 7.5MPa, can meet the special working condition that a medium with lower viscosity needs to circulate in a sealing cavity, and is simple to install on site and reliable in performance.
The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. A mechanical sealing device for a hot water pump is characterized by comprising a gland, a static ring component, a dynamic ring, a pumping ring and an elastic piece;
the gland bush is sleeved on the shaft sleeve and is axially fixed on the pump cover through a fixing piece;
the pumping ring is sleeved on the shaft sleeve and is fixed with the shaft sleeve; the outer wall of the pumping ring is circumferentially limited on the inner wall, close to the pump cover, of the gland;
a first annular groove is formed in the inner wall of one end, far away from the pump cover, of the pumping ring, and a movable ring is arranged in the first annular groove and fixedly connected with the pumping ring;
the static ring assembly is fixedly connected with the gland, and two ends of the elastic element are abutted between the static ring assembly and the gland, so that the end face of the static ring assembly is always attached to the end face of the movable ring;
the pressure cover is provided with a first ring groove, a second ring groove, a first input port and a first output port; the axis of the first input port is vertical to the axis of the shaft sleeve and is communicated with the first annular groove; the axis of the first output port and the axis of the shaft sleeve form a preset angle; and the second ring groove is used for communicating the first output port with the position of the pumping ring, which is provided with the notch.
2. The mechanical seal of claim 1, wherein the gland includes an outer gland and an inner gland;
the outer gland is sleeved on the shaft sleeve, and the inner gland is arranged between the outer gland and the pump cover;
the outer wall of the pumping ring is axially limited on the inner wall of the inner gland;
the first ring groove, the first input port and the first output port are arranged on the outer gland;
a second annular groove is formed in one end, close to the inner gland, of the outer gland, and a third annular groove is formed in one end, close to the outer gland, of the inner gland; the second annular groove and the third annular groove are matched to form the second annular groove.
3. The mechanical seal of claim 1, wherein the stationary ring assembly includes a stationary ring seat, a stationary ring support bracket, and a stationary ring;
a fourth annular groove is formed in the inner wall of one end, close to the movable ring, of the static ring seat; the static ring is arranged in the fourth annular groove after being sleeved on the static ring supporting frame, and the outer side wall of the static ring is abutted against the inner wall of the fourth annular groove;
the end surface of the static ring is always attached to the end surface of the dynamic ring; the static ring seat is fixedly connected with the gland, and two ends of the elastic piece are abutted between the static ring seat and the gland.
4. A mechanical seal according to claim 3 wherein the stationary ring is a graphite ring.
5. A mechanical seal according to claim 3 or 4 wherein a fifth annular groove is provided in the outer wall of the stationary ring at the end thereof adjacent the rotating ring.
6. The mechanical sealing device according to claim 3 or 4, wherein a sixth annular groove is arranged on the inner wall of one end of the static ring away from the dynamic ring;
a first annular boss matched with the sixth annular groove is arranged on the outer wall, close to the static ring, of the static ring support frame; the sixth annular groove is disposed on the first annular boss.
7. The mechanical sealing device according to claim 1, wherein 3-4 third ring grooves are arranged at the position of the gland for circumferentially limiting the inner wall of the pumping ring;
a gap of 0.3 mm-0.5 mm is arranged between the gland and the pumping ring.
8. The mechanical seal of claim 1, wherein an end of the pumping ring proximate the second ring groove is provided with a second annular ledge;
the second annular boss is provided with bevel grooves at equal intervals; the bottom surface of bevel connection groove with the axis of pumping ring is preset the acute angle, just the bottom surface runs through the annular boss of second.
9. The mechanical seal of claim 8, wherein a half slot is disposed between adjacent ones of said bevel slots;
the semi-open groove extends from the end surface of the second annular boss to the bottom surface and does not penetrate through the bottom surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021975403.5U CN213298368U (en) | 2020-09-11 | 2020-09-11 | Mechanical sealing device for hot water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021975403.5U CN213298368U (en) | 2020-09-11 | 2020-09-11 | Mechanical sealing device for hot water pump |
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| CN213298368U true CN213298368U (en) | 2021-05-28 |
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| CN202021975403.5U Active CN213298368U (en) | 2020-09-11 | 2020-09-11 | Mechanical sealing device for hot water pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023000477A1 (en) * | 2021-07-23 | 2023-01-26 | 华工(江门)机电有限公司 | Mounting seat, electric-motor mounting structure, and inline pump |
-
2020
- 2020-09-11 CN CN202021975403.5U patent/CN213298368U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023000477A1 (en) * | 2021-07-23 | 2023-01-26 | 华工(江门)机电有限公司 | Mounting seat, electric-motor mounting structure, and inline pump |
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