CN107120316A - A kind of horizontal-type high temperature pump - Google Patents

A kind of horizontal-type high temperature pump Download PDF

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Publication number
CN107120316A
CN107120316A CN201710522726.5A CN201710522726A CN107120316A CN 107120316 A CN107120316 A CN 107120316A CN 201710522726 A CN201710522726 A CN 201710522726A CN 107120316 A CN107120316 A CN 107120316A
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CN
China
Prior art keywords
temperature
mechanical seal
pump
horizontal
sealed letter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201710522726.5A
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Chinese (zh)
Other versions
CN107120316B (en
Inventor
孙敏
牛红军
高国红
卢昭
周太勇
赵亮
李波
赵芳
孙德臣
孔令杰
徐晓冬
商丽
李娟娟
许德忠
屈婷婷
尤洋
司洪超
谷云鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHENYANG BLOWER WORKS GROUP NUCLEAR POWER PUMP CO Ltd
Original Assignee
SHENYANG BLOWER WORKS GROUP NUCLEAR POWER PUMP CO Ltd
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Publication date
Application filed by SHENYANG BLOWER WORKS GROUP NUCLEAR POWER PUMP CO Ltd filed Critical SHENYANG BLOWER WORKS GROUP NUCLEAR POWER PUMP CO Ltd
Priority to CN201710522726.5A priority Critical patent/CN107120316B/en
Publication of CN107120316A publication Critical patent/CN107120316A/en
Application granted granted Critical
Publication of CN107120316B publication Critical patent/CN107120316B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/58Cooling; Heating; Diminishing heat transfer
    • F04D29/586Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/08Sealings
    • F04D29/10Shaft sealings
    • F04D29/106Shaft sealings especially adapted for liquid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/08Sealings
    • F04D29/10Shaft sealings
    • F04D29/12Shaft sealings using sealing-rings
    • F04D29/126Shaft sealings using sealing-rings especially adapted for liquid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts

Abstract

The present invention discloses a kind of horizontal-type high temperature pump, is related to the structure-design technique field of high-temperature pump, cooling chamber is internally provided with sealed letter body;Main shaft is provided with axle sleeve through sealed letter body, and mechanical seal and connection and drive device are run through in one end, and the other end is provided with impeller, and impeller is respectively arranged at the both sides of sealed letter body with drive device;High-temperature medium chamber is the first space that impeller is encircled into sealed letter body;Mechanical seal chamber is that mechanical seal surrounds the second space to be formed with sealed letter body;Sealing ring is provided between axle sleeve on main shaft and sealed letter body between high-temperature medium chamber and mechanical seal chamber, the first pre-determined distance is provided between sealing ring and axle sleeve, sealing ring is axially provided with the first preset length along main shaft.The horizontal-type high temperature pump of the present invention can effectively suppress the rise of mechanical seal chamber temperature under stand-by state, ensure the sealing effectiveness and the safety of production of mechanical seal.

Description

A kind of horizontal-type high temperature pump
Technical field
The present invention relates to the structure-design technique field of high-temperature pump, in particular to a kind of horizontal-type high temperature pump.
Background technology
The high-temperature pump of high temperature fluid medium is conveyed, when it runs, in the mechanical seal chamber formed including mechanical seal High temperature fluid medium be sent in the external cooler of high-temperature pump and carry out heat exchange, the high temperature fluid medium backflow after cooling Into mechanical seal chamber, the circulation of fluid medium of temperature reduction takes away the heat that friction is produced, and maintains mechanical seal chamber relatively low Temperature levels;When equipment is in stand-by state, the medium transfixion of mechanical seal intracavitary, at this moment, due to high temperature in pump Fluid media (medium) it is temperature-resistant, the high temperature fluid medium of mechanical seal intracavitary is cooled without external cooler, high temperature High temperature fluid medium in pump can carry out microfluidic in each intracavitary of connection and (flow into/flow including high temperature fluid medium among these Go out mechanical seal chamber), the temperature of mechanical seal chamber can cool down with the stopping of external cooler and persistently raise even more than machine The sealed alarm temperature of tool, and if the o-ring in the mechanical seal that is closely related with mechanical seal chamber is constantly in the condition of high temperature It can then accelerate its aging to deform, so as to reduce the sealing effectiveness of mechanical seal, the service life of mechanical seal be shortened, to life Production causes a certain degree of danger.
The content of the invention
It is an object of the invention to solve above-mentioned deficiency of the prior art there is provided one kind in the stand-by state to slow down The elevated horizontal-type high temperature pump of mechanical seal chamber temperature.
The purpose of the present invention is by following technical solution:A kind of horizontal-type high temperature pump, for conveying high temperature fluid medium, bag Include:The pump housing;Sealed letter body, is arranged at pump body, and cooling chamber is internally provided with sealed letter body;Main shaft, is provided with axle sleeve, passes through Sealed letter body is worn, mechanical seal and connection and drive device are run through in one end, and the other end is provided with impeller, impeller and drive device point The both sides of sealed letter body are not arranged at;High-temperature medium chamber, the first space that impeller is encircled into sealed letter body;Mechanical seal chamber, Mechanical seal surrounds the second space to be formed with sealed letter body;The axle on main shaft between high-temperature medium chamber and mechanical seal chamber Sealing ring is provided between set and sealed letter body, the first pre-determined distance is provided between sealing ring and axle sleeve, sealing ring is along main shaft It is axially arranged to have the first preset length.
In such scheme preferably, sealing ring is fixedly mounted in the passage of the main shaft of sealed letter body.
In any of the above-described scheme preferably, mechanical seal is coaxially fixedly installed on sealed letter body with main shaft, in machinery Sealing is internal to be circumferentially provided with pumping ring along main shaft.
In any of the above-described scheme preferably, pumping installations is provided with pumping ring, will during for horizontal-type high temperature pump operation High temperature fluid in mechanical seal chamber is pumped to cooler and carries out heat exchange.
In any of the above-described scheme preferably, the first keyway is provided with main shaft, is provided with axle sleeve and the first key The slotted eye that groove matches, sets organic envelope axle sleeve in mechanical seal, and pumping ring is fixed on machine envelope axle sleeve, on machine envelope axle sleeve Be provided with the second keyway, main shaft by key sealed respectively with axle sleeve, machine axle sleeve be connected and with axle sleeve, pump ring synchronous axial system.
In any of the above-described scheme preferably, coolant inlet runner, cooling liquid outlet stream are provided with sealed letter body Road, cooling liquid inlet runner and cooling liquid outlet flow passage cooling chamber and sealed letter body exterior space.
It is preferably in any of the above-described scheme, in addition to bearing, it is arranged between sealed letter body and drive device, for holding By the radial load and axial load of main shaft.
In any of the above-described scheme preferably, bearing is provided with fixed seat, and bearing is fixedly connected on fixation by fastener On seat.
In any of the above-described scheme preferably, pumping installations is provided with pumping ring, will during for horizontal-type high temperature pump operation High temperature fluid in mechanical seal chamber is pumped to the cooler of peripheral hardware and carries out returning to mechanical seal chamber formation loop after heat exchange.
The horizontal-type high temperature pump that the present invention is provided sets sealing ring in the passage of the main shaft of sealed letter body, is sealed by adjusting The length of gap and sealing ring along main-shaft axis direction between ring and axle sleeve, so as to adjust mechanical seal chamber and high-temperature medium High temperature fluid medium in the circulation of high temperature fluid medium between chamber, limitation horizontal-type high temperature pump high temperature dielectric cavity is close to machinery Seal in chamber and flow, fitted seal letter body cut-off high-temperature medium chamber carries out heat transfer into mechanical seal chamber, it is to avoid horizontal-type high temperature The mechanical seal chamber of pump raises the accelerated ageing of O-ring in caused mechanical seal due to temperature in the stand-by state, extends The service life of horizontal-type high temperature pump, has heightened the security of production.
Brief description of the drawings
Fig. 1 is the part-structure schematic diagram of the horizontal-type high temperature pump preferred embodiment of the present invention;
Fig. 2 is the temperature difference in the prior art between the mechanical seal chamber and high-temperature medium chamber of horizontal-type high temperature pump with stand-by state Figure is moved towards in the change of time;
Fig. 3 is shown in horizontal-type high temperature pump Fig. 1 of the present invention between preferred embodiment mechanical seal chamber and high-temperature medium chamber The temperature difference moves towards figure with the change of stand-by state time;
Fig. 4 is preferred embodiment mechanical seal chamber shown in horizontal-type high temperature pump Fig. 1 of the present invention under different gap length Temperature change moves towards figure, wherein, solid line represents the temperature change compared with short air gap, and dotted line represents the temperature change compared with long gap;
Fig. 5 is shown in horizontal-type high temperature pump Fig. 1 of the present invention between preferred embodiment mechanical seal chamber and high-temperature medium chamber Figure is moved towards in change of the temperature difference under different gap orifice size, wherein, the length of sealing ring is identical.
Reference:
1- sealed letter bodies;2- main shafts;3- mechanical seals;4- bearings;
5- impellers;6- sealing rings;7- keys;The external coolers of 8-;
11- cooling chambers;12- high-temperature medium chambers;13- coolant inlet runners;
14- cooling liquid outlet runners;21- axle sleeves;31- mechanical seal chambers;
41- fixed seats.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the preferred embodiments of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is further described in more detail.In the accompanying drawings, it is identical from beginning to end or Similar label represents same or similar element or the element with same or like function.Described embodiment is this hair Bright a part of embodiment, rather than whole embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to For explaining the present invention, and it is not considered as limiting the invention.Based on the embodiment in the present invention, ordinary skill The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention. Embodiments of the invention are described in detail below in conjunction with the accompanying drawings.
In the description of the present embodiment, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", "front", "rear", The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer " is based on accompanying drawing institutes The orientation or position relationship shown, is for only for ease of description the present embodiment and simplifies description, rather than indicate or imply meaning Device or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the present embodiment The limitation of protection domain.
High-temperature pump for conveying high-temperature medium, wherein most typical is industrial pump, used in nuclear power station pump, wherein for fire Group of motors feed pump, fore pump, the residual heat removal pump of used in nuclear power station, main feed pump, drainage pump etc. are all conveying high-temperature mediums High-temperature pump.The present embodiment can be stepped up influence to solve high-temperature pump mechanical annular seal space temperature in stand-by state in the prior art There is provided a kind of horizontal-type high temperature pump for the technical problem of high-temperature pump service life and production safety.
Reference picture 1, the horizontal-type high temperature pump that the present embodiment is provided, for conveying high temperature fluid medium, including:The pump housing;Sealing Letter body 1, is arranged at pump body, and cooling chamber 11 is internally provided with sealed letter body 1;Main shaft 2, is provided with axle sleeve 21, through close Packing body 1, one end is through mechanical seal 3 and connects and drive device, and the other end is provided with impeller 5, impeller 5 and drive device point The both sides of sealed letter body 1 are not arranged at;High-temperature medium chamber 12, the first space that impeller 5 is encircled into sealed letter body 1;Machinery is close Chamber 31 is sealed, mechanical seal 3 surrounds the second space to be formed with sealed letter body 1;High-temperature medium chamber 12 and mechanical seal chamber 31 it Between main shaft 2 on axle sleeve 21 and sealed letter body 1 between be provided with sealing ring 6, be provided with first between sealing ring 6 and axle sleeve 2 Pre-determined distance, sealing ring 6 has the first preset length along main shaft 2 is axially arranged.
Those skilled in the art know that mechanical seal 3 is by a pair or several to perpendicular to main shaft 2 and relative slip End face keeps fitting under the elastic force or magneticaction of Fluid pressure and compensation mechanism and is equipped with auxiliary seal and reaches Drain Resistance Gland seal device.In horizontal-type high temperature pump operation, this pair or it is several to end face operationally because friction generates heat, heat is by machinery Pumping ring in sealing 3, which is pumped into external cooler 8, to be exchanged heat, and the cold water after heat exchange returns mechanical seal intracavitary, is formed One independent circulation, reduces the temperature of annular seal space.In high-temperature pump running, the one side of mechanical seal 3 is by high-temperature pump Friction generates heat between the influence temperature rise of interior high temperature fluid medium, the inner part of another aspect mechanical seal 3, in order to The operational efficiency of high-temperature pump and the safety of equipment are ensured, external at mechanical seal 3 cooler 8 can be provided with, in horizontal height Cooler 8 runs and mechanical seal 3 is cooled simultaneously during warm pump operation, so that the temperature in mechanical seal chamber 31 can be maintained Within the scope of one relatively low temperature, the apparatus structure at mechanical seal 3 will not be subjected to the too high caused poor sealing of temperature Or structural failure.But when high-temperature pump is stopped or during in stand-by state, still have high temperature fluid Jie in high-temperature pump Matter, high temperature fluid medium is placed in high-temperature medium chamber 12.When high-temperature pump shuts down, the temperature in mechanical seal chamber 31 is less than height Temperature in warm dielectric cavity 12.But it is due to that contain in the high-temperature pump pump housing is high temperature fluid medium, the high temperature fluid medium leads to Crossing the gap between sealed letter body 1 and axle sleeve 21 and flowing into mechanical seal chamber 31 causes the temperature in mechanical seal chamber 31 to raise, The temperature difference reduces, even more than the alarming value of mechanical seal.Temperature rise in mechanical seal chamber 31 will be to the close of mechanical seal 3 Envelope produces influence, can reduce the service life of mechanical seal 3 in the condition of high temperature for a long time, influences sealing effectiveness.
A sealing ring 6, sealing are provided with the horizontal-type high temperature pump that the present embodiment is provided between axle sleeve 21 and sealed letter body 1 In the passage that the main shaft 2 that ring 6 is arranged on sealed letter body 1 passes through, and sealing ring 6 is arranged in the passage close to impeller 5 One end.It can be by fixation in the passage passed through with main shaft 2 of the interference fits installation set on sealed letter body 1 that sealing ring 6, which is, In the passage that part or the mode of spot welding pass through the main shaft 2 that sealing ring 6 is fixed on sealed letter body 1.Installed by interference fits Being arranged on the mode that spot welding is fixed on sealed letter body 1 can exempt using other connectors, save the horizontal of the present embodiment The production material cost and installation cost of high-temperature pump;Sealing ring 6 is arranged on sealed letter body 1 by using connector, torn open Dress is convenient,, can be by more in order to ensure that the spacing between sealing ring 6 and axle sleeve 21 is constant when using different-diameter main shaft Change the axle sleeve 2 of various outer diameter or the sealing ring 6 of different inner diameters to complete matching, it is to avoid the whole sealed letter body 1 of replacing or The sealing ring 6 matched with the diameter of axle sleeve 21 is changed by more cumbersome process meanses.
When main shaft 2 is installed on sealed letter body 1 in order to avoid sealed letter body 1 and main shaft 2 axle sleeve 21 in horizontal-type high temperature pump Interference is produced during operating, gap is provided between sealed letter body 1 and axle sleeve 21.Gap connection high-temperature medium chamber 12 and machinery Annular seal space 31, when horizontal-type high temperature pump is operated, high temperature fluid medium can produce microfluidic along the gap, from high-temperature medium chamber 12 In flow in mechanical seal chamber 31, cause the temperature of mechanical seal chamber 31 to raise.In horizontal-type high temperature pump operation, mechanical seal 3 It can be cooled by the external cooler 8 of horizontal-type high temperature pump, the temperature in mechanical seal chamber 31 is maintained relatively low level; Horizontal-type high temperature pump is when shutting down or in stand-by state, and high temperature fluid medium still flows to mechanical seal from high-temperature medium chamber 12 The external cooler 8 of horizontal-type high temperature pump has shut down under chamber 31, but this state, and this will result in mechanical seal chamber 31 not Disconnected to have high temperature fluid medium to flow into and the implementation without cooling measure, the temperature in mechanical seal chamber 31 can be with high temperature fluid The entrance of medium and constantly raised by the heat transfer that high temperature fluid medium is produced, the height in final and high-temperature medium chamber 12 The temperature of warm fluid media (medium) is approached.
In order to not influence the normal operation of horizontal-type high temperature pump, and shut down in horizontal-type high temperature pump or during in stand-by state The temperature of mechanical seal chamber 31 do not raise excessively, maintain within mechanical seal alarm temperature, during horizontal-type high temperature pump operation Temperature, it is to avoid temperature raises the structural damage and the sealing effectiveness of whole horizontal-type high temperature pump to mechanical seal 3, the present embodiment Horizontal-type high temperature pump is provided with sealing ring 6 between axle sleeve 21 and sealed letter body.It is mounted with after sealing ring 6, axle sleeve 21 and sealing Spacing between letter body reduces, but the size in this gap should ensure antidetonation demand (the horizontal height that especially nuclear power station is used Warm pump) and the equipment operation demand such as natural bow of rotor in the case of determine, will not both produce axle sleeve 21 and sealed letter body 1 it Between interference, while can also reduce high temperature fluid medium from high-temperature medium chamber 12 flow to the flowing of mechanical seal chamber 31. The normal operation of horizontal-type high temperature pump so can have both been ensured, the heat between high-temperature medium chamber 12 and mechanical seal chamber 31 is also reduced Exchange.
The distance between sealing ring 6 and axle sleeve 21 are the first pre-determined distance, and length of the sealing ring 6 along main shaft axial direction is first Preset length.By adjusting the combination of the first pre-determined distance and the first preset length, and fitted seal letter on horizontal-type high temperature pump The cooling of body 1 can make the temperature of mechanical seal chamber 31 of the horizontal-type high temperature pump in shutdown or stand-by state be maintained at relatively low water It is flat, for the reduced levels are the temperature of the mechanical seal chamber 31 when sealing ring 6 is not installed.The horizontal height of the present embodiment Warm pump includes to reducing the elevated measure of the temperature of mechanical seal chamber 31:First, cooling chamber 11 is provided with sealed letter body 1, is cooled down Coolant is passed through in chamber 11 can reduce the heat transfer between mechanical seal chamber 31 and high-temperature medium chamber 12, i.e. high-temperature medium chamber 12 Interior high temperature fluid medium is transferred to when the heat energy of mechanical seal chamber 31 is transmitted in sealed letter body 1 by sealed letter body 1 to be passed through Cooling liquid part in cooling chamber 11 absorbs and discharged outside sealed letter body 1, so that it is close with machinery to play barrier high-temperature medium chamber 12 The effect of heat transfer between envelope chamber 31;Secondth, the distance between sealing ring 6 and axle sleeve 21 are the first pre-determined distance;3rd, sealing Length of the ring 6 along main shaft axial direction is the first preset length.
Further, sealing ring 6 is fixedly mounted in the passage of the main shaft 2 of sealed letter body 1.Due to horizontal-type high temperature pump Operationally main shaft 2 is around its center axis high-speed rotation, if sealing ring 6 is arranged on axle sleeve 21, it is necessary to be equipped with specific The sealed letter body 1 of model, if plan reaches the first pre-determined distance of different numerical value, then need to be changed sealed letter body or Person's changing main-spindle, not only wastes time and energy, but also to reserve the sealed letter body 1 or main shaft 2 of Multiple Type.In order to save manpower Cost and the means of production, sealing ring, which is arranged in the passage of the main shaft 2 of sealed letter body 1, can save production cost, Sealing ring 6 need to only be disassembled to the sealing ring 6 for changing another respective thickness when adjusting the first pre-determined distance of different numerical value , it is to avoid change sealed letter body 1 and main shaft 2, time and labour saving and need to only possess several various sizes of sealing rings 6, Production cost can be more saved relative to sealed letter body 1 or changing main-spindle 2 is changed.
Further, mechanical seal 3 with main shaft 2 is coaxial is fixedly installed on sealed letter body 1, the wherein rotating ring of mechanical seal Be connected with the axle sleeve 21 of main shaft 2 and with the synchronous axial system of axle sleeve 21, the internal circumferential of mechanical seal 3 is provided with pumping ring, in main shaft 2 On be provided with the first keyway, the slotted eye matched with the first keyway is provided with axle sleeve 21, for be fixedly mounted pumping ring Machine envelope axle sleeve on be provided with the second keyway, main shaft is sealed axle sleeve and is connected with axle sleeve 21, machine respectively by key 7.Mechanical seal 3 with it is close Packing body 1 constitutes mechanical seal chamber 31.Be provided with pumping ring in mechanical seal 3, horizontal-type high temperature pump in the process of running, machine The higher coolant of temperature is pumped to external cooler 8 and carries out heat exchange in tool annular seal space 31, and then temperature reduction pumps again Return in mechanical seal chamber 31, circulating cooling liquid takes away the heat for the generation that rubs between the internal structure end face of mechanical seal 3 to keep Mechanical seal chamber 31 maintains relatively low temperature, it is to avoid produces influence to the O-shaped sealing ring set in mechanical seal 3, thinks O-shaped close Seal ring is in the easy aging of the condition of high temperature for a long time, influences the sealing effectiveness and service life of mechanical seal 3.
The first keyway set on main shaft 2 is slotted eye, and not through main shaft 2, the slotted eye set on axle sleeve 21 is set In the inner side of axle sleeve 21, the size of the slotted eye is identical with the size of the first keyway on main shaft 2.The first keyway, axle on main shaft 2 Slotted eye on set 21, the hole of the second keyway on pumping ring are fixed to it and by key 7, make main shaft 2, axle sleeve 21, pumping Ring can synchronous axial system, efficiently mechanical seal chamber 31 is cooled in horizontal-type high temperature pump operation.
Further, coolant inlet runner 13, cooling liquid outlet runner 14, coolant are provided with sealed letter body 1 Inlet channel 13 connects cooling chamber 11 and the exterior space of sealed letter body 1 with cooling liquid outlet runner 14.Cooling in sealed letter body 1 It is the coolant flowed in chamber 11, by coolant the bulk temperature of sealed letter body 1 can be made to be maintained at a relatively low level, though The temperature of whole horizontal-type high temperature pump can not be reduced, but the high temperature in high-temperature medium chamber 12 can be prevented to a certain extent through close Packing body 1, which is transferred to, causes the temperature in mechanical seal chamber 31 to raise in mechanical seal chamber 31, cause mechanical sealing effect to decline. It is connected with cooling chamber 11 and is provided with coolant inlet runner 13, cooling liquid outlet runner 14, its position connected with cooling chamber 11 Put at 2 maximum positions of the distance being arranged in cooling chamber 11, coolant is flowing in cooling chamber 11, and coolant can not Interruption enters cooling chamber 11 from coolant inlet runner 13, then flows out cooling chamber 11 from cooling liquid outlet runner 14, so enters The heat of sealed letter body 1 can be absorbed to greatest extent (heat is by high-temperature medium chamber 12 by entering the coolant of cooling chamber 11 Interior high temperature fluid medium is through heat transfer to sealed letter body 1), sealed letter body 1 can prevent the heat in high-temperature medium chamber 12 It is transferred in mechanical seal chamber 31.
Further, the horizontal-type high temperature pump that the present embodiment is provided also includes bearing 4, is arranged at sealed letter body 1 and is filled with driving Between putting, radial load and axial load for bearing main shaft 2.Bearing 4 is provided with fixed seat 41, and bearing logical 4 crosses fastener It is fixedly connected in fixed seat 41.The effect of bearing 4 is that main shaft 2 is played a supportive role, and reduces resistance when main shaft 2 is rotated Power, sets fixed seat 41 to avoid bearing 4 on bearing 4 and rocks the main shaft 2 that caused horizontal-type high temperature pump is operationally caused Radial deflection, causes structure operation troubles.
The horizontal-type high temperature pump that the present embodiment is provided sets sealing ring 6 to reduce in mechanical seal chamber 31 on sealed letter body 1 Excessive temperature rise cause the sealing effectiveness of mechanical seal 3 reduce, the embodiment in actual production implementation, and The effect cooled to its mechanical seal chamber 31 using the horizontal-type high temperature pump being related in above-described embodiment is clearly.
The horizontal-type high temperature pump that the present embodiment is provided is in specific implementation process, due to technical know-how demand, the present embodiment pair Specific engineering project and the concrete model of horizontal-type high temperature pump do not give disclosure, but this has no effect on those skilled in the art couple The understanding of the present embodiment technical scheme.The horizontal height of the present embodiment is illustrated with the specific implementation process of certain model horizontal-type high temperature pump as follows The influence to the temperature of mechanical seal chamber 31 that warm pump can reach.
Table 1 installs comparative experimental data before and after sealing ring on horizontal-type high temperature pump
It can be contrasted and drawn by the test data described in table 1:First, when sealing ring 6 being installed not in horizontal-type high temperature pump As the temperature in horizontal-type high temperature pump in the temperature rise mechanical seal chamber 31 of high temperature fluid medium is increased, mechanical seal chamber The temperature difference in 31 with high temperature fluid medium also gradually increases.The difference is that being mounted with after sealing ring 6 in mechanical seal chamber 31 Temperature is low compared with temperature when not installing sealing ring 6, and is mounted with mechanical seal chamber 31 and high temperature fluid medium after sealing ring 6 The temperature difference be gradually increased with the rise of high temperature fluid medium temperature, the elevated effect of the temperature of limit mechanical annular seal space 31 is brighter It is aobvious.
Medium temperature meaning is the temperature of the high temperature fluid medium in high-temperature medium chamber 12 in pump in listed data in table 1 Degree, refers to that horizontal-type high temperature pump is not provided with temperature change of the sealing ring 6 under shutdown or stand-by state before changing, refers to after change The temperature change for being horizontal-type high temperature pump after sealing ring 6 is installed under shutdown or stand-by state, before changing the temperature difference refer to Horizontal-type high temperature pump is not provided with temperature of the sealing ring 6 under shutdown or stand-by state between mechanical seal chamber 31 and high-temperature medium chamber 12 Spend difference, after change the temperature difference refer to horizontal-type high temperature pump set sealing ring 6 after under shutdown or stand-by state mechanical seal chamber Temperature gap between 31 and high-temperature medium chamber 12.
Reference picture 2 and Fig. 3, when horizontal-type high temperature pump enters stand-by state, temperature is relatively low in the prior art, with standby shape The state time gradually extends, and the temperature in mechanical seal chamber 31 gradually rises, and maximum temperature reaches 107 DEG C, if mechanical seal 3 is long-term Structural damage aging is easily caused in the temperature, mechanical sealing effect is influenceed;After the horizontal-type high temperature pump provided using the present invention, The temperature of mechanical seal chamber 31 is raised, highest with the extension of stand-by state time after horizontal-type high temperature pump enters stand-by state Temperature reaches 60.2 DEG C, can be controlled in a relatively low temperature, mechanical seal 3 compared to mechanical seal chamber 31 of the prior art Being in can use the good time to extend relative to prior art at this temperature.
In addition to above-mentioned horizontal-type high temperature pump can suppress the elevated factor of the temperature of mechanical seal chamber 31 under stand-by state, ginseng According to the data provided in Fig. 4-Fig. 5, the length (axial length of the sealing ring 6 along main shaft 2) and sealing ring 6 of sealing ring 6 with Distance (i.e. the first distance) can also influence the temperature change of mechanical seal chamber 31 under stand-by state between axle sleeve 21.
Data in above chart data and accompanying drawing are that the application applicant selects after numerous experiments have been carried out The partial data taken, wherein, the temperature setting of the high temperature fluid medium in experiment high temperature dielectric cavity 12 is Celsius for 180 every time Degree, is enough to illustrate the beneficial effect that the present invention can be brought by experiment many times.Learnt by the analysis of mass data, Set sealing ring 6 effectively to suppress the rise of the temperature of mechanical seal chamber 31 between axle sleeve 21 and sealed letter body 1, and seal Gap length between the length and sealing ring 6 and axle sleeve 21 of ring 6 can also further influence mechanical seal under stand-by state The temperature change of chamber 31, and effect is substantially, is capable of the service life of effective prolonged mechanical sealing 3, raising horizontal-type high temperature pump Sealing effectiveness and the safety of production.
Finally it should be noted that:The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations;Although The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that:It still may be used To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic; And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and Scope.

Claims (8)

1. a kind of horizontal-type high temperature pump, for conveying high temperature fluid medium, it is characterised in that including:
The pump housing;
Sealed letter body (1), is arranged at the pump body, and cooling chamber (11) is internally provided with the sealed letter body (1);
Main shaft (2), is provided with axle sleeve (21), through the sealed letter body (1), and one end is through mechanical seal (3) and connects with driving Dynamic device, the other end is provided with impeller (5), and the impeller (5) is respectively arranged at the sealed letter body (1) with the drive device Both sides;
High-temperature medium chamber (12), the first space that the impeller (5) is encircled into the sealed letter body (1);
Mechanical seal chamber (31), the mechanical seal (3) surrounds the second space to be formed with the sealed letter body (1);
Axle sleeve (21) on the main shaft (2) between the high-temperature medium chamber (12) and the mechanical seal chamber (31) with it is close Sealing ring (6) is provided between packing body (1), be provided between the sealing ring (6) and the axle sleeve (2) first it is default away from From the sealing ring (6) has the first preset length along the main shaft (2) is axially arranged.
2. horizontal-type high temperature pump as claimed in claim 1, it is characterised in that the sealing ring (6) is fixedly mounted on through described In the passage of the main shaft (2) of sealed letter body (1).
3. horizontal-type high temperature pump as claimed in claim 1, it is characterised in that the mechanical seal (3) and the main shaft (2) are coaxial It is fixedly installed on the sealed letter body (1), pump is circumferentially provided with along the main shaft (2) in the mechanical seal (3) inside Send ring.
4. horizontal-type high temperature pump as claimed in claim 3, it is characterised in that be provided with pumping installations on the pumping ring, be used for The high temperature fluid in the mechanical seal chamber (31) is pumped to the cooler (8) during the horizontal-type high temperature pump operation and carries out heat Exchange.
5. horizontal-type high temperature pump as claimed in claim 3, it is characterised in that be provided with the first keyway on the main shaft (2), The slotted eye matched with first keyway is provided with the axle sleeve, organic envelope axle sleeve is set in the mechanical seal (3), The pumping ring is fixed on the machine envelope axle sleeve, is provided with the second keyway on machine envelope axle sleeve, the main shaft (2) passes through Key (7) respectively with the axle sleeve (21), the machine envelope axle sleeve be connected and with the axle sleeve (21), it is described pump ring synchronous axial system.
6. horizontal-type high temperature pump as claimed in claim 1, it is characterised in that be provided with coolant in the sealed letter body (1) Entrance channel (13), cooling liquid outlet runner (14), the cooling liquid inlet runner (13) and the cooling liquid outlet runner (14) cooling chamber (11) and sealed letter body (1) exterior space are connected.
7. horizontal-type high temperature pump as claimed in claim 1, it is characterised in that also including bearing (4), is arranged at the sealed letter body (1) between the drive device, radial load and axial load for bearing the main shaft (2).
8. horizontal-type high temperature pump as claimed in claim 7, it is characterised in that the bearing (4) is provided with fixed seat (41), described Bearing logical (4) is crossed fastener and is fixedly connected in the fixed seat (41).
CN201710522726.5A 2017-06-30 2017-06-30 A kind of horizontal-type high temperature pump Active CN107120316B (en)

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* Cited by examiner, † Cited by third party
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