CN115045831B - Dynamic temperature-regulating mechanical sealing element of asphalt pump and assembling method thereof - Google Patents
Dynamic temperature-regulating mechanical sealing element of asphalt pump and assembling method thereof Download PDFInfo
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- CN115045831B CN115045831B CN202210717131.6A CN202210717131A CN115045831B CN 115045831 B CN115045831 B CN 115045831B CN 202210717131 A CN202210717131 A CN 202210717131A CN 115045831 B CN115045831 B CN 115045831B
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- ring
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- oil
- ring seat
- movable ring
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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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
- F04C15/003—Sealings for working fluid between radially and axially moving parts
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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
- F04C2/02—Rotary-piston machines or pumps of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C2/025—Rotary-piston machines or pumps of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents the moving and the stationary member having co-operating elements in spiral form
Abstract
The invention discloses a dynamic temperature-regulating mechanical seal of an asphalt pump and an assembly method thereof, wherein the dynamic temperature-regulating mechanical seal comprises a static ring seat and a movable ring seat, a cooling and coagulation-preventing space is formed between the static ring seat and the movable ring seat, an elastic transmission element is arranged in the cooling and coagulation-preventing space of a pump body rotating shaft, the elastic transmission element is used as a compensation element for driving the transmission element to synchronously start with the movable ring seat, the static ring seat comprises a gland and a circular static ring, an extension ring is arranged at the end part of the circular static ring, the movable ring seat is arranged in the circular space surrounded by the extension ring, at least two oil inlets and oil outlets distributed along the diameter of the circular static ring are formed on the side curved surface of the circular static ring, low-temperature oil for cooling is introduced into the oil inlets, and the oil outlets discharge high-temperature oil subjected to heat exchange and temperature rise; the cooling anti-condensation space is formed between the static ring and the movable ring and is used for reducing the height Wen Qingkuang caused by the rotation of the movable ring and the rotation between the sealing ring and the pump body rotating shaft, so that the metal fatigue phenomenon caused by the high temperature condition is reduced.
Description
Technical Field
The invention relates to the technical field of sealing elements, in particular to a dynamic temperature-regulating mechanical sealing element of an asphalt pump and an assembly method thereof.
Background
At present, the mechanical sealing device is widely applied to fluid mechanical chemical pumps with rotary equipment in the industries of oil refining, chemical industry and the like. The medium of the sealing device in the asphalt pump is asphalt, and the asphalt pump has stronger corrosiveness.
Most of the existing mechanical sealing elements are tightly attached between the movable ring and the static ring when the pump body rotating shaft rotates, so that asphalt medium is prevented from leaking to damage other pump body components, but the movable ring synchronously rotates along with the pump body rotating shaft, and due to the application of the movable ring sealing ring, the temperature of the mechanical sealing element is quickly increased, the temperature is high, and the mechanical sealing element is easily damaged.
Disclosure of Invention
The invention aims to provide a dynamic temperature-regulating mechanical seal of an asphalt pump and an assembly method thereof, which are used for solving the technical problems that the temperature of a mechanical seal part in the prior art is fast to rise, the temperature is high, and the mechanical seal part is easy to damage.
In order to solve the technical problems, the invention specifically provides the following technical scheme:
the dynamic temperature-regulating mechanical sealing element of the asphalt pump comprises a static ring seat sleeved on a pump body rotating shaft and a moving ring seat synchronously rotating with the pump body rotating shaft, wherein the moving ring seat comprises a metal moving ring, a temperature-reducing and coagulation-preventing space is formed between the static ring seat and the moving ring seat, an elastic transmission element is arranged in the temperature-reducing and coagulation-preventing space of the pump body rotating shaft, the elastic transmission element is connected with the inner surface of the moving ring seat, the elastic transmission element is used as a compensation element for driving the transmission element to synchronously start with the moving ring seat, and the elastic transmission element is used for keeping the moving ring seat relatively moving when the pump body rotating shaft rotates so as to buffer impact;
the static ring seat comprises a gland sleeved outside the pump body rotating shaft, and a circular static ring which is positioned inside the gland and is fixedly arranged with the gland through bolts, an extension ring surrounding the outer side surface of the movable ring seat is arranged on the outer side of the circular static ring, the movable ring seat is arranged in a circular space surrounded by the extension ring, and the circular static ring, the extension ring and the movable ring seat form a cooling and anti-condensation space;
the side curved surface of the extension ring is provided with at least two oil inlets and oil outlets which are distributed along the diameter of the extension ring, low-temperature oil for cooling is introduced into the oil inlets, and the oil outlets discharge high-temperature oil subjected to heat exchange and temperature rise.
As a preferable scheme of the invention, a heat insulation gasket is arranged between the outer surface of the gland and the pump body shell, and the gland is fixedly connected with the pump body shell through a bolt by the heat insulation gasket;
the heat insulation gasket is provided with grooves corresponding to the oil inlet and the oil outlet, funnel cavities are arranged at the positions of the oil inlet and the oil outlet, the funnel cavities penetrate through the grooves of the heat insulation gasket and are connected with the pump body shell, an oil storage cavity is arranged at the position corresponding to the oil inlet, a backflow cavity is arranged at the position corresponding to the oil outlet, the oil storage cavity is connected with the backflow cavity through a one-way valve, and high-temperature oil heated in the backflow cavity is returned to the oil storage cavity to be cooled so as to generate low-temperature oil and is subjected to circulating cooling in the cooling and condensation preventing space.
As a preferable scheme of the invention, electromagnetic valves are respectively arranged in funnel cavities connected with the oil inlet and the oil outlet, and the electromagnetic valves are used for controlling the on-off of the oil inlet and the oil outlet so that the electromagnetic valves are in a closed state when the pump body is powered off, and the circular stationary ring, the extension ring and the movable ring seat form a cooling and anti-condensation space.
As a preferable scheme of the invention, a concave groove is arranged on a side curved surface of the movable ring seat, a sinking groove matched with the movable ring seat is arranged on an opening wall surface of the extension ring, a convex ring positioned in the concave groove is arranged in the sinking groove, a first special-shaped sealing ring is sleeved on the sinking groove and the outer side of the convex ring, and the movable ring seat rotates around the extension ring in a sealing manner through the first special-shaped sealing ring;
the side surface of the first special-shaped sealing ring is fixedly stuck on the wall surface of the opening of the extension ring, and the part of the first special-shaped sealing ring, which is positioned in the sinking groove, is in an active state.
As a preferable mode of the invention, the thickness of the extension ring is larger than the thickness of the movable ring seat, the groove width of the sinking groove is larger than the thickness of the movable ring seat, and the width of the protruding ring is smaller than the groove width of the concave groove, so that the movable ring seat can relatively move in a sealing state on the surface of the extension ring.
As a preferable scheme of the invention, the outer side surfaces of the sinking groove and the protruding ring are provided with an inflation ring, the inner surface of the inflation ring is fixedly adhered with the first special-shaped sealing ring, and the outer surface of the inflation ring is fixedly adhered with the sinking groove and the protruding ring respectively;
the extension ring is equipped with towards the surface in cooling anti-condensation space with the inflation valve that the charging collar is connected, oil inlet or oil drain is equipped with the inflation line, the inflation line be used for to inflate in the inflation valve, so that first dysmorphism sealing washer all the time with extend the ring closely laminating, with the compensation first dysmorphism sealing washer's wearing and tearing volume.
As a preferable scheme of the invention, the elastic transmission element comprises a spring seat fixedly arranged on the pump body rotating shaft through a fastening screw, and a plurality of extension springs uniformly arranged on the spring seat, and the other end of each extension spring is arranged on the surface of the movable ring seat through a spring pin;
the spring seat is provided with a perforation at the position where the extension spring is arranged, a transmission rod is arranged in the extension spring, one end of the transmission rod penetrates through the perforation, the other end of the transmission rod is fixedly arranged together with the spring pin, and the spring seat drives the movable ring seat to synchronously rotate with the pump body rotating shaft through the transmission rod.
As a preferable scheme of the invention, the circular stationary ring comprises a sealing disc and a cylindrical assembly block which is arranged on the side curved surface of the sealing disc through a fastening bolt, and the cylindrical assembly block is wrapped on the movable ring seat to form a whole;
the surface of the sealing disc facing the gland forms a temporary whole with the sink groove on the gland through the protruding block, the surface of the sealing disc facing the movable ring seat is provided with a circular groove, the diameter of the circular groove is the same as the circular diameter surrounded by the transmission rod, the groove diameter of the circular groove is the same as the diameter of the transmission rod, and the sealing disc is secondarily fixed with the gland through the fastening bolt.
As a preferable scheme of the invention, the side curved surface of the sealing disc is provided with an O-shaped sealing ring, the O-shaped sealing ring is used for preventing leakage between the sealing disc and the gland, and the side curved surface of the gland, the side curved surface of the sealing disc and the side curved surface of the cylindrical assembly block are provided with a plurality of fastening bolts penetrating through the O-shaped sealing ring.
In order to solve the technical problems, the invention further provides the following technical scheme: a method of assembling a dynamic temperature regulating mechanical seal for an asphalt pump comprising the steps of:
step 100, forming a first assembly body by a cylindrical assembly block in a circular static ring and a movable ring seat, and installing the movable ring seat of the first assembly body on a pump body rotating shaft, wherein the surface of the movable ring seat is seated on a horizontal table top so that the first assembly body and the center of the pump body rotating shaft are concentrically arranged;
step 200, integrally mounting a spring seat in the inner space of the first assembly body, and establishing a synchronous driving relationship between the spring seat and the movable ring seat;
step 300, forming a temporary whole by a sealing disc of a circular static ring and a gland, sleeving the sealing disc on a pump body rotating shaft, and moving the sealing disc to the first assembly until the sealing disc is limited by a transmission rod in the spring seat to a maximum movement position;
step 400, a plurality of assembling tools work synchronously so as to fix a sealing disc and a gland through fastening bolts, wherein the sealing disc and the gland form a secondarily fixed whole;
and 500, distributing the sealing disc, the cylindrical assembly blocks and the gland in sequence from inside to outside, and fixedly mounting the sealing disc, the cylindrical assembly blocks and the side curved surfaces of the gland by using fastening bolts, wherein the gland and the sealing disc form a whole which is fixed relative to the pump body rotating shaft.
Compared with the prior art, the invention has the following beneficial effects:
the invention ensures the sealing state between the movable ring and the static ring, ensures that the medium cannot leak, and simultaneously forms a cooling and anti-condensation space between the static ring and the movable ring, which is used for reducing the high Wen Qingkuang caused by the rotation of the movable ring and the rotation between the sealing ring and the pump body rotating shaft, thereby reducing the metal fatigue phenomenon caused by the high temperature condition.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
FIG. 1 is a schematic side sectional view of a seal provided in an embodiment of the present invention;
fig. 2 is a schematic diagram of a front structure of a cooling and anti-condensation space according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an installation structure of a first special-shaped seal ring according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an elastic transmission element according to an embodiment of the present invention;
fig. 5 is a flow chart illustrating a seal assembly sequence according to an embodiment of the present invention.
Reference numerals in the drawings are respectively as follows:
1-a movable ring seat; 2-a stationary ring seat; 3-an elastic transmission element; 4-an oil inlet; 5-an oil drain port; 6-a heat insulating gasket; 7-a funnel cavity; 8-an oil storage cavity; 9-a reflow chamber; 10-an electromagnetic valve; 11-concave grooves; 12-sinking grooves; 13-a raised ring; 14-a first special-shaped sealing ring; 15-an inflatable ring; 16-an inflation valve;
21-gland; 22-a circular stationary ring; 23-extension ring;
31-spring seat; 32-stretching a spring; 33-spring pins; 34-a transmission rod; 35-perforating;
221-sealing disc; 222-cylindrical assembled blocks; 223-circular groove; 224-O-ring seal.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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.
As shown in FIG. 1, the invention provides a dynamic temperature-regulating mechanical seal of an asphalt pump, wherein the medium of a sealing device in the asphalt pump is asphalt, so that the dynamic temperature-regulating mechanical seal has stronger corrosiveness, and most of the existing mechanical seals prevent asphalt medium leakage from damaging other pump body components by tightly attaching a movable ring and a static ring when a pump body rotating shaft rotates, but because the movable ring synchronously rotates along with the pump body rotating shaft, and because of the application of a movable ring sealing ring, the temperature of the mechanical seal part is quickly increased, the temperature is very high, and the mechanical seal is easy to damage.
In order to solve the above problems, the present embodiment ensures a sealing state between the movable ring and the stationary ring, ensures that the medium does not leak, and forms a cooling and anti-condensation space between the stationary ring and the movable ring for reducing a high Wen Qingkuang caused by rotation of the movable ring and rotation between the seal ring and the pump body rotating shaft, thereby reducing a metal fatigue phenomenon caused by a high temperature condition.
The mechanical seal in this embodiment specifically includes the cover and establishes at the epaxial quiet ring seat 2 of pump body pivot to and with the synchronous rotatory movable ring seat 1 of pump body pivot, form the cooling between quiet ring seat 2 and the movable ring seat 1 and prevent the congealing space, install elastic transmission element 3 in the cooling space of preventing congealing of pump body pivot, elastic transmission element 3 is connected with the internal surface of movable ring seat 1, elastic transmission element 3 is as the compensation element that drives the synchronous start-up of transmission and movable ring seat 1, and elastic transmission element 3 is used for keeping the movable ring seat 1 relatively movable in order to cushion the impact when the pump body pivot rotates.
The stationary ring seat 2 comprises a gland 21 sleeved outside the pump body rotating shaft and a circular stationary ring 22 which is positioned inside the gland 21 and fixedly arranged with the gland 21 through bolts, an extension ring 23 surrounding the outer side surface of the movable ring seat 1 is arranged on the outer side of the circular stationary ring 22, the movable ring seat 1 is arranged in a circular space surrounded by the extension ring 23, and the circular stationary ring 22, the extension ring 23 and the movable ring seat 1 form a cooling and anti-condensation space.
At least two oil inlets 4 and oil outlets 5 distributed along the diameter of the extension ring 23 are formed on the side curved surface of the extension ring 23, low-temperature oil for cooling is introduced into the oil inlets 4, and the oil outlets 5 discharge high-temperature oil subjected to heat exchange and temperature rise.
As the innovation point of this embodiment, this embodiment forms the cooling and prevents congealing space between quiet ring seat 2 and movable ring seat 1, carries out the heat exchange through the circulating oil body between cooling and prevents congealing space, realizes cooling to quiet ring seat 2, movable ring seat 1 and the pump body pivot between quiet ring seat 2 and the movable ring seat 1 to reduce quiet ring seat 2 and movable ring seat 1 and be heated the circumstances that appears the crack, extension mechanical seal spare's life and sealed effect, and get into the inside pitch of cooling and prevent congealing space and can discharge from oil drain port 5 with the oil body is synchronous, sets up the mode to oil body filtration outside the pump body, filters out the pitch medium, improves the effect that prevents leaking.
In addition, in order to realize sealing effect, the existing mechanical sealing element utilizes the elastic element to tightly attach the movable ring and the static ring, so that the elastic element is often directly exposed, the spring is easy to corrode and damage, thereby the compression-resistant buffering capacity of the movable ring is reduced, the service life of the sealing element is reduced, the elastic transmission element 3 is arranged in the cooling and anti-condensation space, the effect of compensating and buffering impact of the movable ring seat 1 is improved, the service life of the elastic transmission element 3 is prolonged, the corrosion problem is reduced, and meanwhile, the compensation, pre-tightening and buffering effects and the transmission effects of the elastic element in the prior art are combined to form the elastic transmission element 3, so that on one hand, the torque of a shaft is transmitted to the movable ring, and on the other hand, the impact force of the movable ring is reduced.
As the preference of this embodiment, another effect in the cooling anti-condensation space is the heat preservation effect, because the easy solidification that takes place during pitch cooling, then the sealing washer that contacts with pitch takes place to glue easily, therefore when the pump body does not work, this embodiment keeps high temperature oil in the cooling anti-condensation space, carries out the heat preservation operation to the pump body pivot on one hand, avoids pitch to cool down completely and produces the solidification, on the other hand at the pump body during operation, plays lubricated effect in advance to the pump body pivot.
As shown in fig. 1 and 2, a heat insulating washer 6 is arranged between the outer surface of the gland 21 and the pump body shell, and the gland 21 and the pump body shell are fixedly connected through bolts by the heat insulating washer 6.
The position that insulating washer 6 corresponds to oil inlet 4 and oil drain port 5 is equipped with the fluting, all is equipped with funnel cavity 7 in the position that goes into oil port 4 and oil drain port 5, and funnel cavity 7 passes the fluting of insulating washer 6 and is connected with the pump body shell, and the pump body shell is equipped with oil storage chamber 8 in the position that corresponds into oil port 4, and the pump body shell is equipped with backward flow chamber 9 in the position that corresponds oil drain port 5, is connected through the check valve between oil storage chamber 8 and the backward flow chamber 9, and the high temperature oil of the interior intensification of backward flow chamber 9 returns to the oil storage chamber 8 and cools off in order to produce low temperature oil to the cooling is prevented congealing the space and is circulated the cooling.
The temperature-reducing and anti-condensation space is internally cooled through the circularly flowing oil body, high-temperature oil heated in the backflow cavity 9 moves upwards and is transferred to the oil storage cavity 8 through the one-way valve, and the oil enters the temperature-reducing and anti-condensation space through the oil inlet 4 again after the oil storage cavity 8 is cooled, so that the circulating continuous cooling operation is realized.
The funnel cavity 7 that the oil inlet 4 and the oil drain 5 are connected is equipped with solenoid valve 10 respectively, and solenoid valve 10 is used for controlling the break-make of oil inlet 4 and oil drain 5 to make solenoid valve 10 be the closed condition when the pump body outage, circular quiet ring 22, extension ring 23 and movable ring seat 1 form the cooling space of preventing congealing.
The circulation continuous cooling operation in this embodiment is stopped when the pump body is powered off, at this moment, the electromagnetic valve 10 in the funnel cavity 7 connected by the oil inlet 4 and the oil outlet 5 is closed, and the high-temperature oil in the cooling anti-condensation space is reserved, so as to reduce the cooling speed of asphalt, and ensure that the sealing rings used on the movable ring seat 1 and the static ring seat 2 can normally rotate when the pump body is driven.
In order to realize cooling of the mechanical sealing element in the working process of the pump body, and realize heat preservation operation of the sealing element when the pump body stops working, the movable ring and the stationary ring are not tightly attached, but a cooling and anti-condensation space is formed between the stationary ring seat 2 and the movable ring seat 1, so that in order to ensure normal sealing work, the contact surface of the movable ring seat 1 and the stationary ring seat 2 needs to be kept in a sealing state.
As shown in fig. 1, a concave groove 11 is formed in a side curved surface of a movable ring seat 1, a sinking groove 12 matched with the movable ring seat 1 is formed in an opening wall surface of an extension ring 23, a convex ring 13 positioned in the concave groove 11 is arranged in the sinking groove 12, first special-shaped sealing rings 14 are sleeved on the outer sides of the sinking groove 12 and the convex ring 13, and the movable ring seat 1 rotates around the extension ring 23 in a sealing mode through the first special-shaped sealing rings 14.
The thickness of the extension ring 23 is greater than that of the movable ring seat 1, and the groove width of the sinking groove 12 is greater than that of the movable ring seat 1, and the width of the protruding ring 13 is smaller than that of the concave groove 11, so that the movable ring seat 1 can maintain the relative movement of the sealing state on the surface of the extension ring 23.
In this embodiment, the moving ring seat 1 includes a metal moving ring and an O-ring seal ring disposed on the metal moving ring, which is the same as the prior art, and the O-ring seal ring and the first special-shaped seal ring 14 both ensure a sealing effect, so as to ensure the buffer operation of the moving ring seat 1, the moving ring seat 1 can perform a sealing type movement along the extension ring 23, and the specific implementation principle is as follows:
the movable ring seat 1 and the extension ring 23 are mutually clamped through the convex ring 13 and the concave groove 11, so that stable movement of the movable ring seat 1 along the pump body rotating shaft is ensured, and the movable ring seat 1 linearly moves in the pump body rotating shaft because the width of the convex ring 13 is smaller than the groove width of the concave groove 11, so that the range of the movable ring seat 1 is as follows: the difference between the groove width of the concave groove 11 and the width of the convex ring 13.
In order to ensure the sealing effect, the difference between the groove width of the sinking groove 12 and the thickness of the movable ring seat 1 is the same as the difference between the groove width of the concave groove 11 and the width of the convex ring 13, so that the movable ring seat 1 is completely wrapped in the range of the first special-shaped sealing ring 14, and the sealing effect is good.
However, since the friction between the rotating ring and the first special-shaped sealing ring 14 is large, the surface of the first special-shaped sealing ring 14 is worn, and the sealing effect is affected, in order to solve the problems:
as shown in fig. 3, the outer side surfaces of the sinking groove 12 and the protruding ring 13 are provided with an inflation ring 15, the inner surface of the inflation ring 15 is fixedly adhered with the first special-shaped sealing ring 14, and the outer surface of the inflation ring 15 is fixedly adhered with the sinking groove 12 and the protruding ring 13 respectively.
The surface of the extension ring 23 facing the cooling and anti-condensation space is provided with an inflation valve 16 connected with the inflation ring 15, the oil inlet 4 or the oil outlet 5 is provided with an inflation pipeline, and the inflation pipeline is used for inflating the inflation valve 16, so that the first special-shaped sealing ring 14 is tightly attached to the extension ring 23 all the time to compensate the abrasion loss of the first special-shaped sealing ring 14.
The first special-shaped sealing ring 14 keeps close contact with the movable ring seat 1 through the charging ring 15, so that the sealing effect is enhanced to compensate the abrasion loss of the first special-shaped sealing ring 14, in addition, as the side surface of the first special-shaped sealing ring 14 is fixedly stuck on the wall surface of the opening of the extension ring 23, and the part of the first special-shaped sealing ring 14, which is in the sinking groove 12, is in an active state, when the movable ring seat 1 is stressed to linearly move along the pump body rotating shaft, the first special-shaped sealing ring 14 can deform under the action of the charging ring 15, and the gas in the charging ring 15 can ensure that the movable ring seat 1 always keeps a sealing state with the first special-shaped sealing ring 14, so that the sealing effect is ensured.
As shown in fig. 4, the elastic transmission element 3 integrates the compensation buffer function of the elastic element with the transmission function of the torque transmission moving ring of the shaft, the elastic transmission element 3 comprises a spring seat 31 fixedly installed on the rotating shaft of the pump body through a fastening screw, and a plurality of extension springs 32 uniformly arranged on the spring seat 31, and the other end of the extension spring 32 is installed on the surface of the moving ring seat 1 through a spring pin 33.
The spring seat 31 is provided with a through hole 35 at the position where the extension spring 32 is arranged, a transmission rod 34 is arranged in the extension spring 32, one end of the transmission rod 34 penetrates through the through hole 35, the other end of the transmission rod 34 is fixedly arranged with the spring pin 33, and the spring seat 31 drives the movable ring seat 1 to synchronously rotate with the pump body rotating shaft through the transmission rod 34.
In this embodiment, the elastic transmission element 3 is installed in the cooling anti-condensation space, so that the problem of asphalt corrosion is reduced, and when the spring seat 31 and the pump body rotating shaft synchronously rotate, the movable ring seat 1 and the pump body rotating shaft are driven to synchronously rotate by the transmission rod 34.
As another innovation point of the present embodiment, the transmission rod 34 may also be used as a reference platform for installing the stationary ring seat 2, when installing the gland 21 and the circular stationary ring 22, the bolts should be evenly supported after the alignment of the coupling, so as to prevent the end faces of the gland and the stationary ring from deflecting, check the fit clearance between the gland and the stationary ring and the outer diameter of the pump body rotating shaft, that is, concentricity, and the periphery should be even, that is, the gland and the stationary ring should be concentrically arranged with the pump body rotating shaft, so in the present embodiment, the transmission rod 34 may be used as a reference fulcrum for installing the gland 21.
It should be noted in advance that, as shown in fig. 1, since the movable ring seat 1 and the extension ring 23 are mutually locked by the convex ring 13 and the concave groove 11, the circular stationary ring 22 includes the sealing disc 221 and the cylindrical assembly block 222 mounted on the curved surface of the sealing disc 221 by the fastening bolt, and the cylindrical assembly block 222 is wrapped on the movable ring seat 1 to form a whole.
As can be seen from fig. 1 and fig. 4, the surface of the sealing disc 221 facing the gland 21 is formed into a temporary whole with the sink groove on the gland 21 through the protruding block, the surface of the sealing disc 221 facing the moving ring seat 1 is provided with a circular groove 223, the diameter of the circular groove 223 is the same as the circular diameter surrounded by the transmission rod 34, the groove diameter of the circular groove 223 is the same as the diameter of the transmission rod 34, and the sealing disc 221 and the gland 21 are secondarily fixed through the fastening bolt.
The side curved surface of the sealing disc 221 is provided with an O-ring 224, the O-ring 224 is used for preventing leakage between the sealing disc 221 and the gland 21, and the side curved surface of the gland 21, the side curved surface of the sealing disc 221 and the side curved surface of the cylindrical assembly block 222 are provided with a plurality of fastening bolts penetrating through the O-ring 224.
That is, when the mechanical seal is assembled, the first special-shaped sealing ring 14 is arranged at the end of the cylindrical assembly block 222, the cylindrical assembly block 222 and the movable ring seat 1 form a first assembly body, a joint plate is directly generated during production, then the sealing disc 221 and the cylindrical assembly block 222 are fixed through bolts, so that the installation is convenient, and the sealing effect of the first special-shaped sealing ring 14 is ensured.
The transmission rods 34 are uniformly distributed on the movable ring seat 1, and the transmission rods 34 are used as supporting points for mounting the sealing disc 221, so that the sealing disc 221, the gland 21 and the pump body rotating shaft can be ensured to be concentrically arranged.
This embodiment is further with circular quiet ring 22 split for sealing disk 221 to and install the cylindricality package assembly 222 at sealing disk 221 side curved surface through fastening bolt, when guaranteeing the whole leakproofness between movable ring seat 1 and the quiet ring seat 2, easy to assemble and production, guarantee the sealed effect of the first dysmorphism sealing washer 14 between movable ring seat 1 and the quiet ring seat 2, guarantee the sealed effect of the sealing washer of movable ring seat 1 itself simultaneously.
As shown in fig. 5, the method for assembling the dynamic seal ring 1 and the static seal ring 2 in the dynamic temperature adjustment mechanical seal of the asphalt pump according to the present embodiment includes the steps of:
step 100, forming a first assembly body by a cylindrical assembly block in a circular static ring and a movable ring seat, and installing the movable ring seat of the first assembly body on a pump body rotating shaft, wherein the surface of the movable ring seat is seated on a horizontal table surface so that the first assembly body and the center of the pump body rotating shaft are concentrically arranged;
step 200, integrally mounting a spring seat in the inner space of the first assembly, and establishing a synchronous driving relationship between the spring seat and the movable ring seat;
step 300, forming a temporary whole by the sealing disc of the circular static ring and the gland, sleeving the temporary whole on the pump body rotating shaft, and moving the sealing disc to the first assembly until the sealing disc is limited by a transmission rod in the spring seat to the maximum movement position;
step 400, a plurality of assembling tools work synchronously so as to fix the sealing disc and the gland through fastening bolts, and the sealing disc and the gland form a secondarily fixed whole;
and 500, distributing the sealing disc, the cylindrical assembly blocks and the gland in sequence from inside to outside, fixedly mounting the sealing disc, the cylindrical assembly blocks and the side curved surfaces of the gland by using fastening bolts, and forming a fixed whole relative to the pump body rotating shaft by the gland and the sealing disc 221.
It is apparent that the assembly of this embodiment ensures the tightness and also the concentric arrangement of the sealing disc 221, the gland 21 and the pump body spindle.
The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application, the scope of which is defined by the claims. Various modifications and equivalent arrangements may be made to the present application by those skilled in the art, which modifications and equivalents are also considered to be within the scope of the present application.
Claims (7)
1. The dynamic temperature-regulating mechanical sealing element of the asphalt pump is characterized by comprising a static ring seat (2) sleeved on a pump body rotating shaft and a movable ring seat (1) synchronously rotating with the pump body rotating shaft, wherein the movable ring seat (1) comprises a metal movable ring, a temperature-reducing and coagulation-preventing space is formed between the static ring seat (2) and the movable ring seat (1), an elastic transmission element (3) is arranged in the temperature-reducing and coagulation-preventing space of the pump body rotating shaft, the elastic transmission element (3) is connected with the inner surface of the movable ring seat (1), the elastic transmission element (3) is used as a compensation element for driving the transmission element to synchronously start with the movable ring seat (1), and the elastic transmission element (3) is used for keeping the movable ring seat (1) relatively moving to buffer impact when the pump body rotating shaft rotates;
the static ring seat (2) comprises a gland (21) sleeved outside the pump body rotating shaft, and a circular static ring (22) which is positioned inside the gland (21) and fixedly arranged with the gland (21) through bolts, an extension ring (23) surrounding the outer side surface of the movable ring seat (1) is arranged on the outer side of the circular static ring (22), the movable ring seat (1) is arranged in a circular space surrounded by the extension ring (23), and the circular static ring (22), the extension ring (23) and the movable ring seat (1) form a cooling and anti-condensation space;
the side curved surface of the extension ring (23) is provided with at least two oil inlets (4) and oil outlets (5) distributed along the diameter of the extension ring (23), low-temperature oil for cooling is introduced into the oil inlets (4), and the oil outlets (5) discharge high-temperature oil subjected to heat exchange and temperature rise.
2. A dynamic temperature regulating mechanical seal for an asphalt pump according to claim 1,
a heat insulation gasket (6) is arranged between the outer surface of the gland (21) and the pump body shell, and the gland (21) is fixedly connected with the pump body shell through bolts by the heat insulation gasket (6);
the heat insulation gasket (6) is provided with a slot corresponding to the positions of the oil inlet (4) and the oil outlet (5), funnel cavities (7) are formed in the positions of the oil inlet (4) and the oil outlet (5), the funnel cavities (7) penetrate through the slot of the heat insulation gasket (6) and are connected with the pump body shell, the pump body shell is provided with an oil storage cavity (8) corresponding to the position of the oil inlet (4), the pump body shell is provided with a backflow cavity (9) corresponding to the position of the oil outlet (5), the oil storage cavity (8) is connected with the backflow cavity (9) through a one-way valve, and high-temperature oil heated in the backflow cavity (9) returns to the oil storage cavity (8) to be cooled to generate low-temperature oil and circularly cooled in the cooling and anti-condensation space.
3. A dynamic temperature regulating mechanical seal for an asphalt pump according to claim 2,
the novel cooling anti-condensation device is characterized in that an electromagnetic valve (10) is arranged in a funnel cavity (7) connected with the oil inlet (4) and the oil outlet (5) respectively, and the electromagnetic valve (10) is used for controlling the on-off of the oil inlet (4) and the oil outlet (5), so that the electromagnetic valve (10) is in a closed state when a pump body is powered off, and a cooling anti-condensation space is formed by the circular static ring (22), the extension ring (23) and the movable ring seat (1).
4. A dynamic temperature regulating mechanical seal for an asphalt pump according to claim 1,
a concave groove (11) is formed in a side curved surface of the movable ring seat (1), a sinking groove (12) matched with the movable ring seat (1) is formed in an opening wall surface of the extension ring (23), a convex ring (13) positioned in the concave groove (11) is arranged in the sinking groove (12), first special-shaped sealing rings (14) are sleeved on the sinking groove (12) and the outer side of the convex ring (13), and the movable ring seat (1) rotates around the extension ring (23) in a sealing mode through the first special-shaped sealing rings (14);
the side surface of the first special-shaped sealing ring (14) is fixedly stuck on the wall surface of the opening of the extension ring (23), and the part of the first special-shaped sealing ring (14) which is positioned in the sinking groove (12) is in an active state.
5. A dynamic temperature regulating mechanical seal for an asphalt pump according to claim 4,
the thickness of the extension ring (23) is larger than that of the movable ring seat (1), the groove width of the sinking groove (12) is larger than that of the movable ring seat (1), and the width of the protruding ring (13) is smaller than that of the concave groove (11), so that the movable ring seat (1) can relatively move in a sealing state on the surface of the extension ring (23).
6. A dynamic temperature regulating mechanical seal for an asphalt pump according to claim 4,
the outer side surfaces of the sinking groove (12) and the protruding ring (13) are provided with an inflation ring (15), the inner surface of the inflation ring (15) is fixedly adhered with the first special-shaped sealing ring (14), and the outer surface of the inflation ring (15) is fixedly adhered with the sinking groove (12) and the protruding ring (13) respectively;
the surface of extension ring (23) orientation cooling anti-condensation space be equipped with inflation valve (16) that charging collar (15) are connected, oil inlet (4) or oil drain (5) are equipped with the inflation line, the inflation line be used for to aerify in inflation valve (16), so that first dysmorphism sealing washer (14) all the time with extend ring (23) closely laminating, in order to compensate the wearing and tearing volume of first dysmorphism sealing washer (14).
7. A dynamic temperature regulating mechanical seal for an asphalt pump according to claim 1,
the elastic transmission element (3) comprises a spring seat (31) fixedly arranged on the pump body rotating shaft through a fastening screw and a plurality of extension springs (32) uniformly arranged on the spring seat (31), and the other end of the extension spring (32) is arranged on the surface of the movable ring seat (1) through a spring pin (33);
the spring seat (31) is provided with a perforation (35) at the position where the extension spring (32) is arranged, a transmission rod (34) is arranged in the extension spring (32), one end of the transmission rod (34) penetrates through the perforation (35), the other end of the transmission rod (34) is fixedly arranged together with the spring pin (33), and the spring seat (31) drives the movable ring seat (1) to synchronously rotate with the pump body rotating shaft through the transmission rod (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210717131.6A CN115045831B (en) | 2022-06-23 | 2022-06-23 | Dynamic temperature-regulating mechanical sealing element of asphalt pump and assembling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210717131.6A CN115045831B (en) | 2022-06-23 | 2022-06-23 | Dynamic temperature-regulating mechanical sealing element of asphalt pump and assembling method thereof |
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| CN115045831A CN115045831A (en) | 2022-09-13 |
| CN115045831B true CN115045831B (en) | 2023-05-26 |
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| CN2575340Y (en) * | 2002-10-21 | 2003-09-24 | 宜兴市工程塑料设备厂 | Vanes of centrifugal pressure fan and centrifugal pressure fan with the same vanes |
| CN202834067U (en) * | 2012-09-06 | 2013-03-27 | 苏州市东立机械有限公司 | Mechanical seal device |
| CN212054696U (en) * | 2020-04-10 | 2020-12-01 | 中建八局轨道交通建设有限公司 | Sealing device for hinged part of shield tunneling machine |
| CN112253535A (en) * | 2020-10-28 | 2021-01-22 | 芜湖市中天密封件有限公司 | High-temperature screw asphalt pump mechanical sealing element |
| CN216142970U (en) * | 2021-06-29 | 2022-03-29 | 青岛思远化工有限公司 | Mechanical seal cooling device for centrifugal pump |
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