CN102606519A - Boric acid recirculation pump - Google Patents
Boric acid recirculation pump Download PDFInfo
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- CN102606519A CN102606519A CN201210083375XA CN201210083375A CN102606519A CN 102606519 A CN102606519 A CN 102606519A CN 201210083375X A CN201210083375X A CN 201210083375XA CN 201210083375 A CN201210083375 A CN 201210083375A CN 102606519 A CN102606519 A CN 102606519A
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Abstract
The invention discloses a boric acid recirculation pump, belonging to the field of the nuclear power equipment. The boric acid recirculation pump comprises a pump shaft, a pump body, an impeller, a pump cover and an air cooling bearing body; the impeller, the pump cover and the air cooling bearing body are sequentially sleeved along the axial direction of the pump shaft; the pump body, the pump cover and the air cooling bearing body are axially fixed; the impeller is embedded in a volute chamber; a mechanical seal and a bearing body are sequentially arranged along the axial direction of the pump shaft between the air cooling bearing body and the pump shaft in the radial direction; a shaft sleeve is arranged between the pump cover and the pump shaft and between the mechanical seal and the pump shaft in the radial direction; a mechanical seal chamber is formed among the pump cover, the shaft sleeve and the mechanical seal; the mechanical seal comprises a movable ring seat and a mechanical seal cover; the movable ring seat is fixed with the pump shaft and the shaft sleeves in the radial direction; the mechanical seal cover is fixed with the pump cover in the axial direction; a movable ring is fixed on the movable ring seat in the radial direction; a static ring is fixed on the mechanical seal cover in the radial direction; a spring is arranged between the static ring and the mechanical seal cover in the axial direction in order to enable the movable ring and the static ring to be in contact with each other in the radial direction and to act on each other.
Description
Technical field
The present invention relates to a kind of boric acid recirculating pump that is used for nuclear power equipment field.
Background technique
The boric acid recirculating pump is a kind of recirculating pump that often uses in the nuclear power station; The effect of boric acid recirculating pump is: at the nuclear power station run duration; For preventing that boric acid from injecting the boric acid crystallization in the case; By the boric acid recirculating pump, the BAS that boric acid is injected in the case continuously circulates, and guarantees BAS concentration and temperature constant.The another one effect of this pump is to accomplish the first topping up that boric acid injects case.
There is following point in the boric acid recirculating pump of existing technology pump: because the BAS temperature is higher, and more than 80 ℃, the non-homogeneous expansion of the pump housing and said air cooling bearing support; When the sealing section in the mechanical seal chamber being washed cooling; The sealing section can lose efficacy because of the crystallization of boric acid and corrosive action; The boundary dimension of boric acid recirculating pump can't be effectively controlled in addition, and causes it to exceed the maximum value that nuclear power plant system allows.
Summary of the invention
The objective of the invention is in order to overcome the deficiency of existing technology; A kind of boric acid recirculating pump that can effectively prevent boric acid at mechanical seal chamber intercrystalline is provided; Prevent that effectively boric acid from following the mechanical seal inefficacy of pump again, and the safe operation that jeopardizes said boric acid recirculating pump.
A kind of technological scheme that realizes above-mentioned purpose is: a kind of boric acid recirculating pump; Comprise pump shaft; The pump housing, and along said pump shaft axial impeller, pump cover and the air cooling bearing support of socket successively, and the said pump housing, pump cover and said air cooling bearing support are axial restraints;
The said pump housing is divided into suction chamber and spiral case chamber, and said suction chamber one end is provided with outlet(discharge) flange, and an other end axially is connected with said spiral case chamber through joint; On the outer wall of said spiral case chamber outer pipe is set, the end of said outer pipe is provided with outlet(discharge) flange;
Said impeller is built in the said spiral case chamber, the front end of said impeller and said joint socket, and said impeller rear end is socketed in the anti-drive end of said pump shaft;
Between said air cooling bearing support and the said pump shaft, along said pump shaft axially set gradually mechanical seal and bearing support, the axial two ends of said bearing support are provided with bearing respectively, form the oil storage chamber between these two said bearings;
The axial both sides of said bearing support are arranged the oil sealing system respectively, and these two said oil sealing systems are mirror image symmetric arrangement, form the loop oil pocket respectively between these two said oil sealing systems and the said bearing support;
Said pump cover and said mechanical seal and said pump shaft radially between axle sleeve is set; Said pump cover forms the mechanical seal chamber between said axle sleeve and the said mechanical seal;
Said mechanical seal; Comprise rotating seat, machine capping, rotating ring and stationary ring, said rotating seat and said pump shaft and said axle sleeve are radially fixing, said machine capping and said pump cover axial restraint; Said rotating ring radially is fixed on the said rotating seat, and said stationary ring radially is fixed in the said machine capping; Between said stationary ring and the said machine capping spring is set, said rotating ring is axially contacted and stressed each other with said stationary ring.
Further, said spring places in second latch, is provided with in the said machine capping and radially connects fluid through-hole.
Further, said suction chamber is the straight-tapered suction chamber, and said suction chamber is provided with the section area of the section area of said outlet(discharge) flange one end greater than said joint one end.
Further again, said spiral case chamber is single volute type spiral case chamber, and said outlet pipe is arranged at the top of said spiral case chamber; Between the front end of said impeller and the said joint preceding seal ring is set, between the rear end of said impeller and the said pump cover increasing back sealing ring is set, between said impeller and the said pump shaft impeller nut is set.
Further, on the said pump cover axial hole is set, is communicated with said spiral case chamber and said mechanical seal chamber.
Further, said oil sealing system comprises oil baffle disc, bearing cap and dustproof dish, said oil baffle disc and the socket successively on said pump shaft of said dustproof dish, and said dustproof dish and said pump shaft are radially fixed; Said dustproof dish comprises dish axle and dish seat, and said bearing cap is socketed on the outer wall of dish axle of said dustproof dish, and with said air cooling bearing support axial restraint; The center of said bearing cap is provided with boss, on the circumference of said boss end face flange is set, and the limit cover is set on the circumference of said oil baffle disc, makes and forms the oil circuit collection cavity between said oil baffle disc, said bearing cap and the said dustproof dish.
Further again, between said pump shaft and said dustproof disc radial, O-ring seals is set, said bearing cap and said dustproof dish radially between, along said bearing cap oil seal structure is set axially.
Further, said air cooling bearing support and said pump cover axially between fastening screw is set.
Further, the sidewall of said axle sleeve is provided with hierarchic structure, make said axle sleeve near the section area of said pump cover one end greater than the section area of said axle sleeve near said mechanical seal one end.
Further, the bottom of said air cooling bearing support is provided with the bearings pin, and the bottom of said spiral case chamber is provided with the pump pin.
Adopted the technological scheme of a kind of boric acid recirculating pump of the present invention, promptly said boric acid follow again spring in the mechanical seal of pump be arranged on said stationary ring and machine capping axially between.Its technique effect is: in the process of boric acid recirculating pump operation, spring can not damage because receiving alternating stress, thereby causes the inefficacy of said mechanical seal, and influences the safe operation of said boric acid recirculating pump.
Description of drawings
Fig. 1 is the structural representation of a kind of boric acid recirculating pump of the present invention;
Fig. 2 is the enlarged diagram of the A part of a kind of boric acid recirculating pump of the present invention.
Fig. 3 is the structural representation of the mechanical seal of a kind of boric acid recirculating pump of the present invention.
Embodiment
See also Fig. 1 to Fig. 3,, pass through embodiment particularly below, and combine accompanying drawing at length to explain in order to understand technological scheme of the present invention better:
See also Fig. 1; A kind of boric acid recirculating pump of the present invention comprises pump shaft 100, the pump housing 1; And along said pump shaft 100 axial impeller 2, pump cover 3 and the air cooling bearing suppories 5 of socket successively, and be axial restraint between the said pump housing 1, pump cover 3 and the said air cooling bearing support 5.
In the present embodiment; Said pump cover 3 and said air cooling bearing support 5 is provided with fastening screw 32 between axially; The purpose of design is like this: guarantee the conformity that said pump cover 3 and said air cooling bearing support 5 expand; Preventing at said boric acid recirculating pump because the expansion of said pump cover 3 and said air cooling bearing support 5 is inconsistent, influences the safe operation of said boric acid recirculating pump when the transmission temperature surpasses 80 ℃ BAS.
In the present embodiment, the axial restraint between said pump cover 3 and the said air cooling bearing support 5 is accomplished through screw, also is to adopt screw between the said pump cover 3 and the said pump housing 1.In order to strengthen fixing between the said pump housing 1 and the said pump cover 3, the said pump housing 1 and said pump cover 3 are provided with pad between axially.
Between said air cooling bearing support 5 and said pump shaft 100; Axially socket mechanical seal 6 and bearing support 50 successively along said pump shaft 100; Said bearing support 50 axial two ends are provided with the clutch shaft bearing and second bearing respectively, form oil storage chamber 55 between said clutch shaft bearing and said second bearing.
In the present embodiment, said clutch shaft bearing is positioned at the anti-drive end of said bearing support 50, and promptly the left end of bearing support described in Fig. 1 50 is roller bearings; Said second bearing is positioned at the drive end of said bearing support 50, and promptly the right-hand member of bearing support described in Fig. 1 50 is a pair of angular contact ball bearing.The purpose of design is like this: said pump shaft 100 axial forces are born by angular contact ball bearing, and radial force is born by roller bearing.
The axial both sides of said bearing support 50 are arranged oil sealing system 4 respectively, and these two said oil sealing systems 4 are mirror image symmetric arrangement, and these two said oil sealing systems 4 are in said bearing support both sides, and form loop oil pocket 40 between the said bearing support 50 respectively;
Said pump cover 3 and said mechanical seal 6 and said pump shaft 100 radially between axle sleeve 101 is set, said pump cover 3, said axle sleeve 101 and said mechanical seal 6 surround mechanical seal chamber 61.
The said pump housing 1 is divided into suction chamber 11 and spiral case chamber 12, and said suction chamber 11 1 ends are provided with outlet(discharge) flange 111, and an other end axially is connected with said spiral case chamber 121 through joint 112; On the outer wall of said spiral case chamber 12 outer pipe 121 is set, the end of said outer pipe 121 is provided with outlet(discharge) flange 122.
In the present embodiment, said suction chamber 11 is the straight-tapered suction chamber, and said suction chamber 11 is provided with the section area of the section area of said outlet(discharge) flange 112 1 ends greater than said joint 112 1 ends.Said spiral case chamber 12 is single volute type spiral case chambers, and said outlet pipe 121 is arranged at the top of said spiral case chamber 12.
Said impeller 2 is built in the said spiral case chamber 12, the front end of said impeller 2 and 112 sockets of said joint.The rear end of said impeller 2 is socketed in the anti-drive end of said pump shaft 100.Front end described here is meant the end that impeller inlet 21 is set on the said impeller 2.The medium that the boric acid recirculating pump is transmitted is through said suction chamber 11, flows into said impeller 22 from said impeller inlet 21, and the impeller outlet 25 from the circumference of said impeller 2 flows out again.Form pumping chamber between the inwall of the circumference of said impeller 2 and said spiral case chamber 12 and the pump cover 3.
In the present embodiment, in order to improve the efficient of said boric acid recirculating pump, said impeller 2 is an enclosed impeller.
Said suction chamber is that the reason of taper suction chamber is: water in said suction chamber 11 from said suction flange 111 when said joint 112 flows; The flow velocity of water slows down gradually; Therefore the hydraulic loss of BAS in said suction chamber 11 is little; And then guarantee that BAS flows into said impeller inlet 21 with even flow, can effectively improve like this boric acid recirculating pump efficient and anti-cavitation performance.
Said spiral case chamber 12 adopts the purpose of single volute type pumping chamber to be: the section area that helps to reduce said outlet pipe 121 ends; Reduce the bore of said outlet(discharge) flange 122; Reduce the flow velocity of BAS in said outer pipe 122 tail ends; Reduce the local resistance loss of BAS, improve the efficient of boric acid recirculating pump, avoid the adapted motor of said boric acid recirculating pump to be burnt out in said outer pipe 121 tail ends.
Said outlet pipe 121 is perpendicular to the reason that the level ground is provided with on 12 tops, said spiral case chamber: reduce the axial dimension of said boric acid recirculating pump, prevent that the boundary dimension of said boric acid recirculating pump from surpassing the maximum value that nuclear power plant system allowed.
Because said spiral case chamber 12 is single volute type spiral case chambers; In order to make said impeller 2 have the stable rotation center; Seal ring 22 before being provided with between the said joint 112 of the front end of said impeller 2; Between the rear end of said impeller 2 and the said pump cover 3 increasing back sealing ring 23 is set, between said impeller 2 and the said pump shaft 100 impeller nut 24 is set.Simultaneously, rotate with said pump shaft 4 synchronously in order to guarantee said axle sleeve 101 and said impeller 2, said axle sleeve 101 and said impeller 2 axially between also increased pad.
In the present embodiment, for the pump housing that prevents said boric acid recirculating pump is corroded, the therefore said pump housing 1 is processed by nichrome.
Among the present invention; The structure of said axle sleeve 101 has been done improvement: the outer wall of said axle sleeve 101 is provided with hierarchic structure; Said axle sleeve 101 is: when guaranteeing said mechanical seal chamber 61 sizes near the section area of the said pump cover one end purpose greater than said axle sleeve 101; Reduce the size of said pump cover 3, said air cooling bearing support 5 and said mechanical seal 6, the boundary dimension that guarantees said boric acid recirculating pump is in the scope that nuclear power plant system allowed.In addition on the one hand, also can prevent to take place between said axle sleeve 101 and the said mechanical seal 6 size interferes.
See also Fig. 3; In the present embodiment, said mechanical seal 6 is integrated mechanical sealing, comprises rotating seat 62, machine capping 63, rotating ring 64 and stationary ring 65; Said rotating seat 62 is radially fixing with said axle sleeve 101 through O-ring seals and said pump shaft 100; Said machine capping 63 with through said pump cover 3 axial restraints of bolt, said rotating ring 64 radially is fixed on the said rotating seat 62, said stationary ring 65 radially is fixed in the said machine capping 63.Said rotating ring 64 axially contacts with said stationary ring 65 and is stressed each other.Surface of contact between said rotating ring 64 and the said stationary ring 65 is the seal face of said mechanical seal 6.Said rotating seat 62 and said rotating ring 64 is provided with first latch 66 along the circumference of said rotating ring between axially, said machine capping 63 and said stationary ring 65 axially between the circumference of the said stationary ring in edge second latch 67 is set, said second latch, 67 built-in springs 68.
The purpose of design is like this: said spring 68 can not produce alternating stress in the process of boric acid recirculating pump operation; Therefore after the long-time use of said boric acid recirculating pump; Said spring 68 can not lose efficacy yet, thereby guarantees the validity of said mechanical seal 6.And said spring 68 is placed in said second latch 67, its purpose is to prevent that BAS from producing corrosive action to said spring 68.
In said mechanical seal 6; Said machine capping 63 and said rotating seat 62 axially between, said stationary ring 63 and said pump cover 3 axially between, said rotating seat 62 and axle sleeve 101 radially between; Said machine capping 63 and said stationary ring 65 all are provided with O-ring seals between radially; These said O-ring seals are all processed by ethylene propylene diene rubber, and ethylene propylene diene rubber can be aging for a long time under radiation condition, thereby prevent said mechanical seal 6 inefficacies.
In addition; In said machine capping 63, also be provided with and radially connect fluid through-hole 69; The said lower end that radially connects fluid through-hole 69 connects said mechanical seal chamber 61, and the said effect that radially connects fluid through-hole 69 is to receive the BAS that 61 leakages of said mechanical seal chamber are come out on the one hand, is to feed saturated vapour to said mechanical seal chamber 61 in addition on the one hand; Thereby prevent BAS at said mechanical seal chamber 61 intercrystallines, thereby cause mechanical seal to be lost efficacy.
On the said pump cover 3 axial hole 21 is set; Be communicated with said mechanical seal chamber 61; The purpose of design is like this: the BAS of directly the boric acid recirculating pump being carried is introduced said mechanical seal chamber 61, and the seal face of said mechanical seal 6 is washed and cools off.Owing to do not need exterior line; When simplifying the bearing support mounting structure; On the other hand, guaranteed that also the BAS that gets into said mechanical seal chamber 61 can keep original temperature, thereby prevented that said BAS is at said mechanical seal chamber 61 intercrystallines.
After the entry into service of boric acid recirculating pump; Lubricant oil in the said oil storage chamber 55 is through after being arranged at the effect of the disc 102 on the said pump shaft 100; Get rid of said clutch shaft bearing in both sides and said second bearing on the said bearing support 50 respectively, said clutch shaft bearing and said second bearing are lubricated, after said clutch shaft bearing and said second bearing are lubricated; Lubricant oil is oil pocket 40 through said loop, flows back to said oil storage chamber 55.
In said oil storage chamber 55, also be provided with oil ga(u)ge 56 and permanent position lubricating cup 57, in order to monitor the variation of lubricant oil reserves in the said oil storage chamber 55.
The effect of said oil sealing system 4 is to prevent that oil leak from arriving the outside of said boric acid recirculating pump.See also Fig. 2, in the present embodiment, said oil sealing system 4 comprises oil baffle disc 41, bearing cap 42 and dustproof dish 43, and said oil baffle disc 41 is socketed on the said pump shaft 100 with said dustproof dish 43 successively; Said dustproof dish 43 is radially fixing through bolt and said pump shaft 100.Said dustproof dish 43 comprises dish axle and dish seat; Said bearing cap 42 is socketed on the outer wall of dish axle of said dustproof dish 43; And through air relief cock 48 and said air cooling bearing support 5 axial restraints, the center of said bearing cap 42 end faces is provided with boss, and flange 421 is set on the circumference of said boss end face; Limit cover 411 is set on the circumference of said oil baffle disc 41; Form oil circuit collection cavity 44 between said oil baffle disc 41, said bearing cap 42 and the said dustproof dish 43.
The purpose of design is like this: the lubricant oil that is splashed on the said oil baffle disc 41 by said disc 102 can be introduced into said oil circuit collection cavity 44, passes back into said loop oil pocket 40 again, finally returns said oil storage chamber 55.
In the present embodiment, also be provided with chamfering 412 on the circumference of said oil baffle disc 41, said chamfering 412 is in the process through turning and the said limit of Bending Processing cover 411, to form.
In the present embodiment, said oil sealing system 4 also comprises and is arranged on said pump shaft 100 and said dustproof dish 43 O-ring seals 45 between radially; And said bearing cap 42 and said dustproof dish 43 radially between, along the oil seal structures 46 that said bearing cap 42 axially is provided with, in the present embodiment, said oil seal structure 46 belongs to mazy type mechanical seal.
The effect of said O-ring seals 45 is: prevent lubricant oil from leakage between said dustproof dish 43 and the said pump shaft 100, and when preventing again to adopt the outside framework oil seal structure simultaneously, the seize phenomenon that causes owing to spring pressure is excessive.The effect of said oil seal structure 46 is: prevent that lubricant oil is from leaking between said dustproof dish 43 and the said bearing cap 42.
The bottom surface of said bearing cap 42 and said dustproof dish 43 axially between; Annular oil seal structure 47 is set; Form by circular groove 422 and the annular boss 431 on the dish seat end face that is arranged at said dustproof dish 43 on said bearing cap 42 bottom surfaces by being arranged at for this annular oil seal structure 47; They on the one hand can be with said bearing cap 42 axial restraints; Can also prevent on the one hand lubricant oil in addition from leaking between said bearing cap 42 and the said dustproof dish 43, can also prevent that dust from getting into said oil sealing system 4.
Said clutch shaft bearing on said bearing support 50 and said second bearing all are provided with bearing interstage sleeve 58 to the one side of said oil storage chamber 55; The purpose that said bearing interstage sleeve 58 is set is: with the said second bearing axial restraint in said clutch shaft bearing river.
In addition, increase vent rib 54 on the outer wall of said air cooling bearing support 5, long-pending with the outer wall surface that increases said air cooling bearing support 5, when guaranteeing said air cooling bearing support 5 heat dispersions, make the structure of said air cooling bearing support 5 more simple.A screw 59 is arranged at said air cooling bearing support 5 tops.
The bottom of said air cooling bearing support 5 is provided with bearing support and supports 53, and said bearing support support 53 is fixing through screw and said air cooling bearing support 5.The bottom of said spiral case chamber 12 is provided with pump pin 13, and said pump pin 13 is cast as one with said spiral case chamber 12.Said pump pin 13 supports the said boric acid recirculating pump of 53 together support with said bearing support.Simplify the supporting frame of boric acid recirculating pump so greatly, reduced the boundary dimension of said boric acid recirculating pump.
In addition, above said pump pin 13, also be provided with a pipe plug 14 on the outer wall of said spiral case chamber 12, be used for when the boric acid recirculating pump overhauls the BAS emptying in the spiral case chamber 12.
A kind of boric acid recirculating pump in the present embodiment; Through above-mentioned technological means; Solved between the boric acid recirculating pump pump housing 1 and the air cooling bearing support 5 the inconsistent problem that expands, solved BAS and be prone to the problem that causes mechanical seal to be lost efficacy in 61 crystallizations of mechanical seal chamber, lubricant oil are prone to the problem of leaking in the oil sealing system 4; Reduced the boundary dimension of said boric acid recirculating pump simultaneously, made it meet the requirement of nuclear power plant system for boric acid recirculating pump boundary dimension.
Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the present invention; And be not with opposing qualification of the present invention; As long as in connotation scope of the present invention, all will drop in claims scope of the present invention the above embodiment's variation, modification.
Claims (10)
1. boric acid recirculating pump; Comprise pump shaft (100); The pump housing (1), and along said pump shaft (100) the axial impeller of socket (2), pump cover (3) and air cooling bearing support (5) successively, and the said pump housing (1), pump cover (3) and said air cooling bearing support (5) they are axial restraints;
The said pump housing (1) is divided into suction chamber (11) and spiral case chamber (12), and said suction chamber (11) one ends are provided with outlet(discharge) flange (111), and an other end axially is connected with said spiral case chamber (12) through joint (112); Outer pipe (121) is set on the outer wall of said spiral case chamber (12), and the end of said outer pipe (121) is provided with outlet(discharge) flange (122);
Said impeller (2) is built in the said spiral case chamber (12), the front end of said impeller (2) and said joint (112) socket, and said impeller (2) rear end is socketed in the anti-drive end of said pump shaft (100);
Between said air cooling bearing support (5) and the said pump shaft (100); Axially set gradually mechanical seal (6) and bearing support (50) along said pump shaft (100); Said bearing support (50) axially is provided with the clutch shaft bearing and second bearing respectively in two ends, forms oil storage chamber (55) between said clutch shaft bearing and said second bearing;
The axial both sides of said bearing support (50) are arranged oil sealing system (4) respectively, and these two said oil sealing systems (4) are the mirror image symmetric arrangement, form loop oil pocket (40) respectively between these two said oil sealing systems (4) and the said bearing support (50);
Said pump cover (3) and said mechanical seal (6) and said pump shaft (100) radially between axle sleeve (101) is set; Said pump cover (3) forms mechanical seal chamber (61) between said axle sleeve (5) and the said mechanical seal (6); It is characterized in that:
Said mechanical seal (6); Comprise rotating seat (62), machine capping (63), rotating ring (64) and stationary ring (65); Said rotating seat (62) is radially fixing with said pump shaft (100), said axle sleeve (101); Said machine capping (63) and said pump cover (3) axial restraint, said rotating ring (64) radially is fixed on the said rotating seat (62), and said stationary ring (65) radially is fixed in the said machine capping (63); Between said stationary ring (65) and the said machine capping (63) spring (68) is set, said rotating ring (64) is axially contacted and stressed each other with said stationary ring (65).
2. according to the described a kind of boric acid recirculating pump of claim 1, it is characterized in that: said spring (68) places in second latch (67), and said machine capping (63) is gone up setting and radially connect fluid through-hole (69).
3. a kind of boric acid recirculating pump according to claim 1 and 2 is characterized in that: said spiral case chamber (12) is single volute type spiral case chamber, and said outlet pipe (121) is arranged at the top of said spiral case chamber (12); Between the front end of said impeller (2) and the said joint (112) preceding seal ring (22) is set, between the rear end of said impeller (2) and the said pump cover (3) increasing back sealing ring (23) is set, between said impeller (2) and the said pump shaft (100) impeller nut (24) is set.
4. a kind of boric acid recirculating pump according to claim 3; It is characterized in that: said suction chamber (11) is the straight-tapered suction chamber, and said suction chamber (11) is provided with the section area of the section area of said outlet(discharge) flange (111) one ends greater than said joint (112) one ends.
5. a kind of boric acid recirculating pump according to claim 1 and 2 is characterized in that: axial hole (31) is set on the said pump cover (3), is communicated with said spiral case chamber (12) and said mechanical seal chamber (61).
6. a kind of boric acid recirculating pump according to claim 1 and 2; It is characterized in that: said oil sealing system (4) comprises oil baffle disc (41), bearing cap (42) and dustproof dish (43); Said oil baffle disc (41) and said dustproof dish (43) socket successively on said pump shaft (100), said dustproof dish (43) is radially fixing with said pump shaft (100); Said dustproof dish (43) comprises dish axle and dish seat, and said bearing cap (42) is socketed on the outer wall of dish axle of said dustproof dish (43), and with said air cooling bearing support (3) axial restraint; The center of said bearing cap (42) is provided with boss; Flange (421) is set on the circumference of said boss end face; Limit cover (411) is set on the circumference of said oil baffle disc (41), forms oil circuit collection cavity (44) between said oil baffle disc (41), said bearing cap (42) and the said dustproof dish (43).
7. a kind of boric acid recirculating pump according to claim 6; It is characterized in that: O-ring seals (45) is set between radially at said pump shaft (100) and said dustproof dish (43); Said bearing cap (42) and said dustproof dish (43) radially between, along said bearing cap (42) oil seal structure (46) is set axially.
8. a kind of boric acid recirculating pump according to claim 1 and 2 is characterized in that: said air cooling bearing support (5) and said pump cover (3) axially between fastening screw (32) is set.
9. a kind of boric acid recirculating pump according to claim 1 and 2; It is characterized in that: the sidewall of said axle sleeve (101) is provided with hierarchic structure, make said axle sleeve (101) near the section area of said pump cover (3) one sides greater than the section area of said axle sleeve (101) near said mechanical seal (6) one sides.
10. a kind of boric acid recirculating pump according to claim 1 and 2 is characterized in that: the bottom of said air cooling bearing support (5) is provided with bearing support supporting foot (53), and the bottom of said spiral case chamber (12) is provided with pump pin (13).
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| CN 201210083375 CN102606519B (en) | 2012-03-27 | 2012-03-27 | Boric acid recirculation pump |
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| CN 201210083375 CN102606519B (en) | 2012-03-27 | 2012-03-27 | Boric acid recirculation pump |
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| CN104265678A (en) * | 2014-09-26 | 2015-01-07 | 浙江理工大学 | Sealing mechanism for gap between impeller and volute |
| CN105971888A (en) * | 2016-01-11 | 2016-09-28 | 欧技工业设备（江苏）有限公司 | Forced circulation pump with protective shaft sleeve |
| CN106930972A (en) * | 2017-03-16 | 2017-07-07 | 武汉船用机械有限责任公司 | A kind of associated sealing arrangement for bearings for Cargo Oil Pump |
| CN108343614A (en) * | 2018-01-31 | 2018-07-31 | 陕西科技大学 | A kind of efficient sealed methanol oil pump |
| CN108343615A (en) * | 2018-01-31 | 2018-07-31 | 陕西科技大学 | A kind of methanol feed pump |
| CN108916068A (en) * | 2018-08-08 | 2018-11-30 | 陕西科技大学 | A kind of methanol feed pump |
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