CN209294064U - A kind of high revolving speed cartridge type centrifugal pump of high pressure - Google Patents

Abstract

The utility model discloses a kind of high revolving speed cartridge type centrifugal pumps of high pressure, outer barrel including being equipped with suction inlet and discharge opening, core pack assembly is installed in outer barrel, one end that outer barrel is axially located at suction inlet is installed with suction side stuffing box body, suction side stuffing box body outer end is equipped with transverse bearing body component, one end that outer barrel is axially located at discharge opening is equipped with pump cover, pump cover outer end is installed with exhaust end stuffing box body, exhaust end stuffing box body outer end is equipped with thrust bearing body component, the first stage impeller of core pack assembly, each secondary impeller and impeller with main shaft close-fitting；Divide main shaft circumference for installing all keyways of flat key one etc. on main shaft；Impeller snap ring cross section is circle；Chopped-off head middle section, secondary middle section and final stage middle section are connected as one by thru-bolt；Axial thrust balancing devices are being installed at pump cover on main shaft, axial thrust balancing devices include forward horizontal stand drum, rear balancing drum, and forward horizontal stand is bulging and the adjacent end face of rear balancing drum has gap.

Description

A kind of high revolving speed cartridge type centrifugal pump of high pressure

Technical field

The utility model relates to high speed centrifugation pump technical field, specially a kind of high revolving speed cartridge type centrifugal pump of high pressure.

Background technique

Pump is the machinery for conveying liquid or being pressurized liquid, it passes the mechanical energy of prime mover or other external energies Liquid is given, liquid energy is increased, is mainly used to convey liquid to include the fluids such as water, oil, acid & alkali liquid, emulsion, suspended emulsion. Prior art multistage pump usually includes multi-stage impeller, and the series connection of these impeller slide fits is sleeved on main shaft, passes through impeller axis To first stage impeller and tightly to be linked together, torque is transmitted by the flat key being arranged in a linear being arranged in main shaft, in main shaft It is upper that balance hole progress axial force balance is set positioned at the single balancing drum of exhaust end rear end setting or on impeller.It designs in this way The shortcomings that be, the pump axial force that impeller generates at work will transmit and concentrate on the junction of first stage impeller and main shaft, produce Raw very big cumulative stress, while same counterbalancing power is also generated in the connection place of balancing drum and main shaft, it be easy to cause master The failure of axis early fracture, reduces the service life of pump, and the mode of balance hole is arranged on impeller, then reduces the efficiency of pump； Simultaneously because main shaft installation in same arranged in a straight line, leading to main shaft to the flat key for transmitting torque between impellers at different levels Dynamic balance difference shakes big in high speed and is easy to produce waterpower exciting, influences on pump service life big.

Summary of the invention

The purpose of this utility model is to provide a kind of high revolving speed cartridge type centrifugal pump of high pressure, the rigidly good, property with main shaft Energy stabilization, high reliablity, assembly maintenance is convenient, intermittent duty operating condition is adaptable, high speed and high pressure ability is good, the service life is long, effect The high advantage of rate, solves the problems of the prior art.

To achieve the above object, the utility model provides the following technical solutions: a kind of high revolving speed cartridge type centrifugal pump of high pressure, Including outer barrel 7, the outer barrel 7 is equipped with suction inlet 6 and discharge opening 58, is installed with core pack assembly, institute in the outer barrel 7 It states the axial one end for being located at the suction inlet 6 of outer barrel 7 and is installed with suction side stuffing box body 3, outside the suction side stuffing box body 3 End is equipped with transverse bearing body component 2, and the axial one end for being located at the discharge opening 58 of the outer barrel 7 is equipped with pump cover 25, institute It states 25 outer end of pump cover and is installed with exhaust end stuffing box body 27,27 outer end of exhaust end stuffing box body is equipped with thrust bearing body group Part 29, the core pack assembly include main shaft 1, chopped-off head middle section 8, first stage impeller 10, guide vane 14, secondary middle section 18, final stage guide vane 19, Impeller 20, final stage middle section 21,1 both ends of main shaft extend through the suction side stuffing box body 3, the transverse bearing body Component 2, the pump cover 25 and the exhaust end stuffing box body 27, set between the first stage impeller 10 and the final stage guide vane 19 There are several secondary impellers 15；The first stage impeller 10, each secondary impeller 15 and the impeller 20 with it is described 1 close-fitting of main shaft；Between the first stage impeller 10, each secondary impeller 15 and the impeller 20 and the main shaft 1 It is equipped with flat key 1, is used to that 1 circumference of main shaft described in 53 equal part of all keyways of the flat key 1 be installed on the main shaft 1； The first stage impeller 10, each secondary impeller 15 and the impeller 20 are respectively by being set on the main shaft 1 Impeller snap ring 46 carry out axially position on the main shaft 1,46 cross section of impeller snap ring is circle, on the main shaft 1 60 cross section of impeller annular groove for installing the impeller snap ring 46 is circle compatible with 46 cross section of impeller snap ring Arc；The chopped-off head middle section 8 is installed in 10 suction side of first stage impeller, the first stage impeller 10 and each secondary leaf It takes turns 15 exhaust ends and is mounted on the guide vane 14, be arranged with secondary middle section 18, the final stage guide vane outside each guide vane 14 19 are mounted on 20 exhaust end of impeller, are arranged with final stage middle section 21 outside the final stage guide vane 19；The chopped-off head middle section 8, The secondary middle section 18 and the final stage middle section 21 are connected as one by thru-bolt 22；

With the above arrangement, impeller close-fitting generates compression to main shaft outer round surface on main shaft, the rigid of main shaft is improved Property；The keyway being adapted on main shaft with impellers at different levels is circumferentially angularly uniformly distributed, to make the blade phase of impellers at different levels Circumferentially there is certain angle to be staggered, improve the dynamic balance performance of main shaft, suitable for height turn operating condition, and work when impeller To main shaft generate radial reaction force on main shaft circumference distributing equilibrium, improve the service life of main shaft；It avoids simultaneously The hidden danger for the waterpower exciting that the blade phase of impellers at different levels is easy to produce when identical；Impellers at different levels pass through impeller snap ring independently Axially position is carried out on main shaft, the pump axial force that each impeller generates at work passes through impeller snap ring respectively and transmits to main shaft, It is uniformly distributed on main shaft, avoids the phenomenon that axial force accumulation is at one, prevent main shaft early fracture from failing；Impeller snap ring is horizontal Section is the stress concentration effect that circle further reduced main shaft Yu impeller snap ring joint, further increases the stabilization of main shaft Property and service life；The chopped-off head middle section of core pack assembly, secondary middle section and final stage middle section are connected as one by thru-bolt, this Sample simultaneously also will first stage impeller, guide vane of the assembly in chopped-off head middle section, be assemblied in secondary impeller in secondary middle section, guide vane, dress The main shaft for fitting over the impeller in final stage middle section, final stage guide vane and installation impellers at different levels is configured to an entirety, so as to It splits out or is packed into from outer barrel together, it is convenient to overhaul.

Axial thrust balancing devices, the axial thrust balancing devices are being installed at the pump cover 25 on the main shaft 1 Including forward horizontal stand drum 37, rear balancing drum 34, perforation both ends are equipped in 34 outer circle of the forward horizontal stand drum 37 and the rear balancing drum Helicla flute 47, the forward horizontal stand drum 37 and rear balancing drum 34 are set on the main shaft 1 and by flat key 2 41 and institutes State the linkage of main shaft 1；The impeller 20 is closed in described 37 one end of forward horizontal stand drum, and 37 other end of forward horizontal stand drum is coaxially provided with 4th stepped hole 3701 and the 5th stepped hole 3702 are installed with gasket between the 4th stepped hole 3701 and the main shaft 1 2 38, be installed with adjusting pad 2 39 between the 5th stepped hole 3702 and the main shaft 1,2 39 outer end of adjusting pad with point Half snap ring 2 40 is engaged, and the bisecting snap ring 2 40 is installed in the second annular groove 42 being located on the main shaft 1；It is described Balancing drum 34 is adapted to the bisecting snap ring 2 40 equipped with third stepped hole 3403 and is fixed on the bisecting snap ring 2 40 afterwards In second annular groove 42, the rear balancing drum 34 is coaxially provided with second step hole far from one end of the bisecting snap ring 2 40 3402 and first step hole 3401, it is installed with gasket 1 between the second step hole 3402 and the main shaft 1, described Adjusting pad 1, one 32 outer end of adjusting pad and bisecting snap ring 1 are installed between one stepped hole 3401 and the main shaft 1 It is engaged, the bisecting snap ring 1 is installed in the first annular groove 43 being located on the main shaft 1；The forward horizontal stand drum 37 It is arranged with balance set 36 with slide fit in 34 outer circle of the rear balancing drum, the balance set 36 is fixed on the pump cover 25, The forward horizontal stand drum 37 and the rear adjacent end face of balancing drum 34 have gap 59, and the gap 59 is 5 ~ 40mm；

With the above arrangement, devising double balancing drum structures on main shaft, that is, it is designed to former and later two balancing drums, passes through The helicla flute at setting perforation both ends on the bulging and rear balance drum of outer of forward horizontal stand, and have 5 between forward horizontal stand drum and rear balancing drum ~ The gap 40mm, so when pump work, on the one hand high-pressure fluid generates axial thrust to forward horizontal stand drum (direction and impeller are generated Axial force it is opposite) simultaneously segment fluid flow enter in the gap between forward horizontal stand drum and rear balancing drum along helicla flute to rear balancing drum Generate axial thrust (consistent with the axial thrust direction of forward horizontal stand drum)；Forward horizontal stand is bulging and rear balancing drum passes through bisecting snap ring respectively Two and bisecting snap ring one axial thrust that highly pressurised liquid generates is transmitted on main shaft, shared by main shaft different location, to change It has been apt to the stress condition of main shaft；Having grown fluid due to helicla flute edge has apparent save in forward horizontal stand drum and rear balancing drum upper pathway Stream effect reduces leakage amount of fluid, and when containing granule medium in the fluid of pumping, this kind of granule medium can be smooth Be discharged via helicla flute, granule medium is stuck by the bulging and rear balancing drum of forward horizontal stand and balance set when avoiding pump work, to protect Demonstrate,prove the reliability and stability of pump；Since forward horizontal stand is bulging and rear balancing drum is respectively by bisecting snap ring two and bisecting snap ring one in main shaft On carried out axially position, therefore there is no axial gap when balancing the axial force of wheel member, avoid frequent start-stop machine or Abrasion caused by rotor axial play when being changes in flow rate, suitable for the operating condition of continuous operation, especially suitable for intermittent duty Operating condition.

The transverse bearing body component 2 includes bearing block 201, and the thrust bearing body component 29 includes shell 2901, institute It states and is installed with bearing shell 48 in bearing block 201 and the shell 2901 pivoting support is carried out to the main shaft 1, in the bearing shell 48 It is symmetrically arranged with the first oil film wedge 4801 and the second oil film wedge 4803, the bearing shell 48 is interior oily close to described first on main shaft gyration direction The side of wedge 4801 is equipped with pressure dam 4802, be equipped on the bearing block 201 and the shell 2901 lubricating oil interface 51 to The bearing shell 48 is 0.1 ~ 0.2Mpa for lubricating oil, the pressure of the lubricating oil.

By upper arrangement above, 0.1 ~ 0.2Mpa pressure lubrication oil is supplied to bearing shell by lubricating oil interface, on pressure dam With symmetric double oil wedge action, keep pump same with good stability in the case where the operation of high revolving speed.

It is further: pad 5, the suction side stuffing-box are equipped between the suction side stuffing box body 3 and the outer barrel 7 Mechanical sealing parts 1 are equipped between body 3 and the main shaft 1, the mechanical sealing parts 1 close on described 6 one end of suction inlet Cooperate equipped with suction side throat axle sleeve 54 and the main shaft 1；54 outer circle of suction side throat axle sleeve and the suction side filler Suction side throat bushing 55 is installed between 3 inner hole of letter body.

With the above arrangement, improving the leakproofness between suction side stuffing box body and outer barrel, pass through suction side throat The synergistic effect of axle sleeve and suction side throat bushing improves the sealing performance and stability of mechanical sealing parts one, is conducive to mention Height pump bears the high-revolving ability of high pressure.

It is further: mechanical sealing parts 2 2701 are equipped between the exhaust end stuffing box body 27 and the main shaft 1, The mechanical sealing parts 2 2701 are equipped with exhaust end throat bushing 28 with the adjacent one end of the discharge opening 58.

With the above arrangement, improving the sealing performance and stability of mechanical sealing parts two, be conducive to improve pump receiving The high-revolving ability of high pressure.

It is further: on the first stage impeller 10, each secondary impeller 15 and the impeller 20 with institute It states the adjacent one end of suction inlet 6 and is equipped with impeller ring 9,9 outer circle of impeller ring is equipped with middle section sealing ring 11, described Middle section sealing ring 11 is adapted with the inner hole in the corresponding chopped-off head middle section 8, the secondary middle section 18 respectively；The first stage impeller 10 and each secondary impeller 15 with the adjacent one end outer circle of the discharge opening 58 be equipped with hub seal ring 17, the wheel hub Guide blade sleeve 16 is installed between sealing ring 17 and the guide vane 14.

With the above arrangement, improving the sealing performance between impellers at different levels and middle section, reverse leakage is avoided, improves pump Efficiency, and be conducive to improve the pump receiving high-revolving ability of high pressure.

It is further: the final stage guide vane 19 and the guide vane 14 close to the suction inlet 6 end face and it is adjacent described in Between secondary middle section 18 correspond be equipped with positioning pin 1, wherein be located at 10 exhaust end of first stage impeller the guide vane 14 with The same positioning pin 1 also is provided between the adjacent end in the chopped-off head middle section 8；The final stage middle section 21 and 25 phase of pump cover Face between end face equipped with positioning pin 2 23.

With the above arrangement, preventing guide vane, middle section by positioning pin, producing between pump cover component circumferentially displaced, improve each Positional stability between component is conducive to improve the pump receiving high-revolving ability of high pressure.

Further: the pump cover 25 is equipped with pipe joint 2501, between the pump cover 25 and the final stage middle section 21 It is installed with core packet pad 24；Gasket 26 is equipped between the pump cover 25 and the exhaust end stuffing box body 27；25 He of pump cover Pump cover gasket 45 is installed between the outer barrel 7: chopped-off head middle section is equipped between the chopped-off head middle section 8 and the outer barrel 7 Gasket 12.

With the above arrangement, pipeline (not shown) passes through the pipe joint being arranged on pump cover for pump cover inside and inhales when work Entrance connection makes to keep low pressure inside pump cover, that is, the outer end of rear balancing drum is made to keep low pressure, keeps forward horizontal stand bulging and rear balance Drum generates stable longitudinal balance thrust；Not only there is sealing to make and again with damping effect, improve the stability of pump for core packet pad； Gasket, pump cover gasket, chopped-off head middle section gasket ensure the sealing performance between corresponding component, are conducive to improve pump receiving height The high-revolving ability of pressure.

It is further: O-ring seal 35 to be arranged in 36 outer circle of balance set, the O-ring seal 35 has twice.

With the above arrangement, the sealing performance between ensuring corresponding component, is conducive to improve the pump receiving high revolving speed of high pressure Ability.

It is further: snap ring set 30 to be arranged on the main shaft 1, the snap ring set 30 is fastened on institute by turnbuckle 44 It states and the bisecting snap ring 1 is pressed in first annular groove 43 on rear balancing drum 34.

Bisecting snap ring one is pressed in the first annular groove with the above arrangement, facilitating, keeps the firm of bisecting snap ring one, Ensure that the axially position of rear balancing drum stablizes gapless, improves the high stability of pump and be applicable in the energy of the operating condition of intermittent duty Power.

It is further: thrust being installed on the main shaft 1 in the shell 2901 and positioned at the outside of the bearing shell 48 Disk 50,50 both ends of thrust button are equipped with thrust bearing 49, and the seat piece of the thrust bearing 49 is fixedly mounted on the shell In 2901,2901 outer end of shell is equipped with end cap 2902, and sensor 2903 is equipped on the end cap 2902 to main shaft 1 Axial displacement is detected.

With the above arrangement, axial bearing is carried out to main shaft by thrust button and thrust bearing, by sensor to axial direction Displacement is continued to monitor, and is exported monitoring signals to the monitoring system (not shown) of pump by sensor, is found main shaft in time Abnormal operating condition, or assess and make preventive maintenance in advance according to monitoring data, further increase the reliability of pump.

It is further: to correspond to the first stage impeller 10, each secondary impeller 15 and the end on the main shaft 1 The impeller channel circular arc 57 of grade impeller 20, which is adapted to, is provided with circular arc annular groove 56.

With the above arrangement, circular arc annular groove becomes guide face when fluid enters impeller at different levels, guarantee that hydraulic performance is excellent, Improve the efficiency of pump.

In conclusion a kind of high revolving speed cartridge type centrifugal pump of high pressure of the utility model has, main shaft is rigidly good, performance is steady Fixed, high reliablity, assembly maintenance is convenient, intermittent duty operating condition is adaptable, high speed and high pressure ability is good, the service life is long, high-efficient The advantages of.

Detailed description of the invention

FIG. 1 is a schematic structural view of the utility model.

Fig. 2 is the forward horizontal stand drum cut-away view of the utility model.

Fig. 3 is the rear balancing drum cut-away view of the utility model.

Fig. 4 is the impellers at different levels and spindle mounted structural schematic diagram of the utility model.

Fig. 5 is the bearing bush structure schematic diagram of the utility model.

Fig. 6 is fragmentary sectional view at Fig. 1 A.

Fig. 7 is fragmentary sectional view at Fig. 1 B.

Fig. 8 is the main shaft partial enlarged view of the utility model.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Fig. 1-8, a kind of high revolving speed cartridge type centrifugal pump of high pressure, including outer barrel 7 are please referred to, outer barrel 7 is equipped with sucking Mouthfuls 6 and discharge opening 58, core pack assembly is installed in outer barrel 7, and the axial one end for being located at suction inlet 6 of outer barrel 7 is installed with sucking Side stuffing box body 3,3 outer end of suction side stuffing box body are equipped with transverse bearing body component 2, and outer barrel 7 is axial to be located at discharge opening 58 One end pump cover 25 is installed, 25 outer end of pump cover is installed with exhaust end stuffing box body 27, the installation of 27 outer end of exhaust end stuffing box body Have a thrust bearing body component 29, core pack assembly include main shaft 1, chopped-off head middle section 8, first stage impeller 10, guide vane 14, secondary middle section 18, Final stage guide vane 19, impeller 20, final stage middle section 21,1 both ends of main shaft extend through suction side stuffing box body 3, transverse bearing body Component 2, pump cover 25 and exhaust end stuffing box body 27 are equipped with several secondary impellers between first stage impeller 10 and final stage guide vane 19 15；First stage impeller 10, each secondary impeller 15 and impeller 20 with 1 close-fitting of main shaft；First stage impeller 10, each secondary leaf It is equipped with flat key 1 between wheel 15 and impeller 20 and main shaft 1, is used to install all keyways of flat key 1 on main shaft 1 53 etc. divide main shaft 1 circumference；First stage impeller 10, each secondary impeller 15 and impeller 20 are respectively by being set on main shaft 1 Impeller snap ring 46 carry out axially position on main shaft 1,46 cross section of impeller snap ring is circle, for installing impeller on main shaft 1 60 cross section of impeller annular groove of snap ring 46 is compatible with 46 cross section of impeller snap ring arc-shaped；Chopped-off head middle section 8 is installed in 10 suction side of first stage impeller, first stage impeller 10 and 15 exhaust end of each secondary impeller are mounted on guide vane 14, each guide vane 14 It is arranged with secondary middle section 18 outside, final stage guide vane 19 is mounted on 20 exhaust end of impeller, final stage is arranged with outside final stage guide vane 19 Middle section 21；Chopped-off head middle section 8, secondary middle section 18 and final stage middle section 21 are connected as one by thru-bolt 22；

Axial thrust balancing devices are being installed at pump cover 25 on main shaft 1, axial thrust balancing devices include forward horizontal stand drum 37, rear balancing drum 34 is equipped with the helicla flute 47 at perforation both ends, forward horizontal stand drum 37 in 34 outer circle of forward horizontal stand drum 37 and rear balancing drum It is set on main shaft 1 with rear balancing drum 34 and is linked by flat key 2 41 and main shaft 1；Final stage is closed in 37 one end of forward horizontal stand drum Impeller 20,37 other end of forward horizontal stand drum are coaxially provided with the 4th stepped hole 3701 and the 5th stepped hole 3702, the 4th stepped hole 3701 It is installed with gasket 2 38 between main shaft 1, adjusting pad 2 39, adjusting pad are installed between the 5th stepped hole 3702 and main shaft 1 2 39 outer ends are engaged with bisecting snap ring 2 40, and bisecting snap ring 2 40 is installed in the second annular groove 42 being located on main shaft 1； Balancing drum 34 is adapted to bisecting snap ring 2 40 equipped with third stepped hole 3403 bisecting snap ring 2 40 being fixed on the second snap ring afterwards In slot 42, rear balancing drum 34 is coaxially provided with second step hole 3402 and first step hole far from one end of bisecting snap ring 2 40 3401, it is installed with gasket 1 between second step hole 3402 and main shaft 1, is installed between first step hole 3401 and main shaft 1 There is adjusting pad 1, one 32 outer end of adjusting pad is engaged with bisecting snap ring 1, and bisecting snap ring 1, which is installed in, is located at main shaft 1 On the first annular groove 43 in；Slide fit is arranged with balance set 36 in 34 outer circle of forward horizontal stand drum 37 and rear balancing drum, and balance set 36 is solid Surely it being installed on pump cover 25, forward horizontal stand drum 37 and the adjacent end face of rear balancing drum 34 have gap 59, and gap 59 is 5 ~ 40mm, as Preferred embodiment gap 59 is 10mm；

Transverse bearing body component 2 includes bearing block 201, and thrust bearing body component 29 includes shell 2901,201 He of bearing block It is installed with bearing shell 48 in shell 2901, pivoting support is carried out to main shaft 1, the first oil film wedge 4801 and the are symmetrically arranged in bearing shell 48 Two oil film wedges 4803, bearing shell 48 is interior to be equipped with pressure dam 4802, bearing close to the side of the first oil film wedge 4801 on main shaft gyration direction Lubricating oil interface 51 is equipped on seat 201 and shell 2901 to bearing shell 48 for lubricating oil, the pressure of lubricating oil is 0.1 ~ 0.2Mpa, Pressure as preferred embodiment lubricating oil is 0.15Mpa.

It is preferred: pad 5 to be equipped between suction side stuffing box body 3 and outer barrel 7, between suction side stuffing box body 3 and main shaft 1 Equipped with mechanical sealing parts 1, mechanical sealing parts 1 close on 6 one end of suction inlet equipped with suction side throat axle sleeve 54 and main shaft 1 Cooperation；Suction side throat bushing 55 is installed between 54 outer circle of suction side throat axle sleeve and 3 inner hole of suction side stuffing box body.

It is preferred: mechanical sealing parts 2 2701, mechanical sealing part are equipped between exhaust end stuffing box body 27 and main shaft 1 Part 2 2701 and the adjacent one end of discharge opening 58 are equipped with exhaust end throat bushing 28.

It is preferred: in one end adjacent with suction inlet 6 on first stage impeller 10, each secondary impeller 15 and impeller 20 Be equipped with impeller ring 9,9 outer circle of impeller ring is equipped with middle section sealing ring 11, middle section sealing ring 11 respectively with corresponding head Grade middle section 8, secondary middle section 18 inner hole be adapted；First stage impeller 10 and each secondary impeller 15 are adjacent with discharge opening 58 one It holds outer circle to be equipped with hub seal ring 17, guide blade sleeve 16 is installed between hub seal ring 17 and guide vane 14.

It is preferred: final stage guide vane 19 and guide vane 14 a pair between the end face and adjacent secondary middle section 18 of suction inlet 6 It should be equipped with positioning pin 1, wherein also being provided between being located at the adjacent end of guide vane 14 and chopped-off head middle section 8 of 10 exhaust end of first stage impeller same The positioning pin 1 of sample；Positioning pin 2 23 is equipped between final stage middle section 21 and the adjacent end face of pump cover 25.

Preferred: pump cover 25 is equipped with pipe joint 2501, and core packet pad 24 is installed between pump cover 25 and final stage middle section 21； Gasket 26 is equipped between pump cover 25 and exhaust end stuffing box body 27；Pump cover gasket is installed between pump cover 25 and outer barrel 7 45: chopped-off head middle section gasket 12 is equipped between chopped-off head middle section 8 and outer barrel 7.

It is preferred: O-ring seal 35 to be arranged in 36 outer circle of balance set, O-ring seal 35 has twice.

It is preferred: snap ring set 30 to be arranged on main shaft 1, snap ring set 30 is fastened on rear balancing drum 34 by turnbuckle 44 Bisecting snap ring 1 is pressed in the first annular groove 43.

It is preferred: in shell 2901 and it is located at the outside of bearing shell 48 on main shaft 1 thrust button 50 is installed, 50 liang of thrust button End is equipped with thrust bearing 49, and the seat piece of thrust bearing 49 is fixedly mounted in shell 2901, and 2901 outer end of shell is equipped with end Lid 2902 is equipped with sensor 2903 on end cap 2902 and detects to the axial displacement of main shaft 1.

It is preferred: to correspond to the impeller channel of first stage impeller 10, each secondary impeller 15 and impeller 20 on main shaft 1 Circular arc 57 is adapted to and is provided with circular arc annular groove 56.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (10)

1. a kind of high revolving speed cartridge type centrifugal pump of high pressure, including outer barrel (7), the outer barrel (7) be equipped with suction inlet (6) and Discharge opening (58), the outer barrel (7) is interior to be installed with core pack assembly, and the outer barrel (7) is axially located at the suction inlet (6) One end is installed with suction side stuffing box body (3), and suction side stuffing box body (3) outer end is equipped with transverse bearing body component (2), One end that the outer barrel (7) is axially located at the discharge opening (58) is equipped with pump cover (25), pump cover (25) the outer end installing Have exhaust end stuffing box body (27), exhaust end stuffing box body (27) outer end is equipped with thrust bearing body component (29), special Sign is:

The core pack assembly includes main shaft (1), chopped-off head middle section (8), first stage impeller (10), guide vane (14), secondary middle section (18), end Grade guide vane (19), impeller (20), final stage middle section (21), main shaft (1) both ends extend through the suction side stuffing-box Body (3), the transverse bearing body component (2), the pump cover (25) and the exhaust end stuffing box body (27), the chopped-off head leaf It takes turns and is equipped with several secondary impellers (15) between (10) and the final stage guide vane (19)；It is the first stage impeller (10), each described time Grade impeller (15) and the impeller (20) with the main shaft (1) close-fitting；It is the first stage impeller (10), each described time Flat key one (52) is equipped between grade impeller (15) and the impeller (20) and the main shaft (1), on the main shaft (1) For installing main shaft (1) circumference described in all keyways (53) equal part of the flat key one (52)；It is the first stage impeller (10), each The secondary impeller (15) and the impeller (20) pass through the impeller snap ring (46) on the main shaft (1) respectively Axially position is carried out on the main shaft (1), impeller snap ring (46) cross section is circle, is used to pacify on the main shaft (1) Impeller annular groove (60) cross section for filling the impeller snap ring (46) is circle compatible with impeller snap ring (46) cross section Arc；The chopped-off head middle section (8) is installed in the first stage impeller (10) suction side, the first stage impeller (10) and each described Secondary impeller (15) exhaust end is mounted on the guide vane (14), and each guide vane (14) is arranged with secondary middle section outside (18), the final stage guide vane (19) is mounted on the impeller (20) exhaust end, and end is arranged with outside the final stage guide vane (19) Grade middle section (21)；The chopped-off head middle section (8), the secondary middle section (18) and the final stage middle section (21) pass through thru-bolt (22) it is connected as one；

Axial thrust balancing devices, the axial thrust balancing devices are being installed at the pump cover (25) on the main shaft (1) Including forward horizontal stand drum (37), rear balancing drum (34), it is equipped in the forward horizontal stand drum (37) and described rear balancing drum (34) outer circle Penetrate through the helicla flute (47) at both ends, forward horizontal stand drum (37) and rear balancing drum (34) are set on the main shaft (1) and equal It is linked by flat key two (41) and the main shaft (1)；The forward horizontal stand drum (37) one end is closed on the impeller (20), described Forward horizontal stand drum (37) other end is coaxially provided with the 4th stepped hole (3701) and the 5th stepped hole (3702), the 4th stepped hole (3701) be installed with gasket two (38) between the main shaft (1), the 5th stepped hole (3702) and the main shaft (1) it Between be installed with adjusting pad two (39), adjusting pad two (39) outer end is engaged with bisecting snap ring two (40), described point half card Ring two (40) is installed in the second annular groove (42) being located on the main shaft (1)；Balancing drum (34) is equipped with third after described Stepped hole (3403) is adapted to the bisecting snap ring two (40) bisecting snap ring two (40) being fixed on second annular groove (42) in, it is described after balancing drum (34) far from the bisecting snap ring two (40) one end be coaxially provided with second step hole (3402) and First step hole (3401) is installed with gasket one (33) between the second step hole (3402) and the main shaft (1), described Be installed with adjusting pad one (32) between first step hole (3401) and the main shaft (1), adjusting pad one (32) outer end with point Half snap ring one (31) is engaged, and the bisecting snap ring one (31) is installed in the first annular groove being located on the main shaft (1) (43) in；Slide fit is arranged with balance set (36), the balance on the forward horizontal stand drum (37) and described rear balancing drum (34) outer circle Set (36) is fixed on the pump cover (25), and the forward horizontal stand drum (37) and described rear balancing drum (34) adjacent end face have Gap (59), the gap (59) are 5 ~ 40mm；

The transverse bearing body component (2) includes bearing block (201), and the thrust bearing body component (29) includes shell (2901), bearing shell (48) is installed in the bearing block (201) and the shell (2901) to turn round the main shaft (1) Bearing, the bearing shell (48) is interior to be symmetrically arranged with the first oil film wedge (4801) and the second oil film wedge (4803), and the bearing shell (48) is interior in master On axis (1) gyratory directions close to first oil film wedge (4801) side be equipped with pressure dam (4802), the bearing block (201) and Lubricating oil interface (51) Xiang Suoshu bearing shell (48) is equipped on the shell (2901) for lubricating oil, the pressure of the lubricating oil is 0.1~0.2Mpa。

2. the high revolving speed cartridge type centrifugal pump of a kind of high pressure according to claim 1, it is characterised in that: the suction side filler It is equipped with pad (5) between letter body (3) and the outer barrel (7), is set between the suction side stuffing box body (3) and the main shaft (1) There are mechanical sealing parts one (4), the mechanical sealing parts one (4) close on the suction inlet (6) one end equipped with suction side throat Axle sleeve (54) and the main shaft (1) cooperate；In suction side throat axle sleeve (54) outer circle and the suction side stuffing box body (3) Suction side throat bushing (55) are installed between hole.

3. the high revolving speed cartridge type centrifugal pump of a kind of high pressure according to claim 1, it is characterised in that: the exhaust end filler Between letter body (27) and the main shaft (1) be equipped with mechanical sealing parts two (2701), the mechanical sealing parts two (2701) with The adjacent one end of the discharge opening (58) is equipped with exhaust end throat bushing (28).

4. the high revolving speed cartridge type centrifugal pump of a kind of high pressure according to claim 1, it is characterised in that: the first stage impeller (10), equal in one end adjacent with the suction inlet (6) on each secondary impeller (15) and the impeller (20) Equipped with impeller ring (9), impeller ring (9) outer circle is equipped with middle section sealing ring (11), the middle section sealing ring (11) It is adapted respectively with the inner hole of the corresponding chopped-off head middle section (8), the secondary middle section (18)；The first stage impeller (10) and every A secondary impeller (15) is being equipped with hub seal ring (17) with the adjacent one end outer circle of the discharge opening (58), the wheel hub Guide blade sleeve (16) are installed between sealing ring (17) and the guide vane (14).

5. the high revolving speed cartridge type centrifugal pump of a kind of high pressure according to claim 1, it is characterised in that: the final stage guide vane (19) and the guide vane (14) is corresponded between the end face and the adjacent secondary middle section (18) of the suction inlet (6) and is set There is positioning pin one (13), wherein the guide vane (14) and the chopped-off head middle section (8) positioned at the first stage impeller (10) exhaust end The same positioning pin one (13) also is provided between adjacent end；Between the final stage middle section (21) and the pump cover (25) adjacent end face Equipped with positioning pin two (23).

6. the high revolving speed cartridge type centrifugal pump of a kind of high pressure according to claim 1, it is characterised in that: on the pump cover (25) Equipped with pipe joint (2501), core packet pad (24) is installed between the pump cover (25) and the final stage middle section (21)；The pump It covers between (25) and the exhaust end stuffing box body (27) and is equipped with gasket (26)；The pump cover (25) and the outer barrel (7) Between be installed with pump cover gasket (45): between the chopped-off head middle section (8) and the outer barrel (7) be equipped with chopped-off head middle section gasket (12).

7. the high revolving speed cartridge type centrifugal pump of a kind of high pressure according to claim 1, it is characterised in that: the balance set (36) It is arranged in outer circle O-ring seal (35), the O-ring seal (35) has twice.

8. the high revolving speed cartridge type centrifugal pump of a kind of high pressure according to claim 1, it is characterised in that: on the main shaft (1) It is arranged with snap ring set (30), the snap ring set (30) is fastened on by turnbuckle (44) will be described on the rear balancing drum (34) Bisecting snap ring one (31) is pressed in first annular groove (43).

9. the high revolving speed cartridge type centrifugal pump of a kind of high pressure according to claim 1, it is characterised in that: on the main shaft (1) It is equipped with thrust button (50) in the shell (2901) and on the outside of the bearing shell (48), thrust button (50) both ends It is equipped with thrust bearing (49), the seat piece of the thrust bearing (49) is fixedly mounted in the shell (2901), the shell (2901) outer end is equipped with end cap (2902), and sensor (2903) is equipped on the end cap (2902) to the axial direction of main shaft (1) Displacement is detected.

10. the high revolving speed cartridge type centrifugal pump of a kind of high pressure according to claim 1, it is characterised in that: on the main shaft (1) Impeller channel circular arc corresponding to the first stage impeller (10), each secondary impeller (15) and the impeller (20) (57) adaptation is provided with circular arc annular groove (56).