CN201401335Y

CN201401335Y - High-performance mechanical canned motor pump

Info

Publication number: CN201401335Y
Application number: CN2009200128086U
Authority: CN
Inventors: 臧克; 靖永毅; 杨德乾; 栾晓颖; 柴鹏举
Original assignee: Dandong Kelong Group Co Ltd
Current assignee: Dandong Colossus Group Co Ltd; Dandong Kelong Group Co Ltd
Priority date: 2009-04-07
Filing date: 2009-04-07
Publication date: 2010-02-10
Anticipated expiration: 2019-04-07

Abstract

The utility model relates to a high-performance mechanical canned motor pump, which comprises a pump body (1), a pump cover (2), an impeller (13), a pump shaft (4) and a bearing box (5) and is mainlycharacterized in that a mechanical seal device (7) is arranged between the front end of the bearing box (5) and an impeller hub or the pump shaft, a mechanical seal device (8) is arranged between therear end of the bearing box (5) and the pump shaft (4), a pressure balancer (20) is arranged on the front end plate (50) of the bearing box (5) to enable the pressure of the internal chamber (B) of the bearing box (5) to be balanced with the pressure of the internal chamber (A) of the pump cover (2), and screw pumping rings (3, 6) and recirculation holes (53, 56) corresponding to the two mechanical seal devices are arranged to enable the mechanical seal devices and rolling bearings to be fully cooled so as to dissipate the heat. The utility model has the advantages that the sealing performanceis good, the service life is long, the use is safe and reliable, the functionality is good, the adaptability is high, the pump is suitable for all kinds of working pressures, and the pump fully satisfies the requirements on the use under the conditions of high-pressure mediums, toxic mediums, inflammable mediums, explosive mediums and the like.

Description

High performance mechanical canned motor pump

Technical field

The utility model relates to liquid delivery pump, as gear pump, cam pump, centrifugal pump, particularly centrifugal pump.

Background technique

Gear pump; cam pump; centrifugal pump is mainly by the pump housing; pump cover; pump impeller; pump shaft; bearing housing constitutes; bearing housing is fixedlyed connected with pump cover by the suspension of its front end; in order to prevent that medium from leaking from pump shaft; between pump shaft and pump cover, be provided with seal arrangement; particularly adopt mechanical seal device; because relative pressure is bigger in the pump chamber; or when requiring sealing effect very high; requirement to mechanical seal device is also very high; as adopt the single mechanical end face seal device; to form a large amount of dielectric leakages in case lose efficacy, though as adopting double end-face mechanical sealing device to improve the reliability of sealing, double end-face mechanical sealing device must be furnished with complicated auxiliary protection system support and use; particularly solve heat dissipation problem; fitting operation, safeguard all very inconvenient, and cost height.In addition, even adopted mechanical seal device still to have a spot of medium can constantly leak into the pump cover opposite side, promptly leak into outside the pump, cause environmental pollution, the leakage environmental pollution of particularly poisonous, inflammable, explosive medium and the influence of safety in production are very big.

The model utility content

The purpose of this utility model provides a kind of good airproof performance, and is functional good, high pressure resistant, long service life, safe and reliable high performance mechanical canned motor pump.

The utility model includes the pump housing, pump cover, pump impeller, pump shaft, bearing housing, pump shaft is by the installation that is rotatably assorted of rolling bearing system and bearing housing front end and back end, in pump cover inner chamber A, promptly between the front end-plate of bearing housing and pump impeller wheel hub or and pump shaft between be provided with mechanical seal device-----front end robot seal arrangement, between bearing housing end plate and pump shaft, be provided with another mechanical seal device----rear robot seal arrangement, form airtight bearing housing inner chamber B, offer the pressure balance through hole and connection is provided with pressurizer on bearing housing front end-plate face, pressurizer is made of the piston cylinder structure; In bearing housing inner chamber B, promptly between bearing housing front end-plate and pump shaft, be provided with the spiral pump ring, on the bearing housing front end-plate, offer the return port that communicates with front end robot seal arrangement installation cavity C, the spiral pump ring is fixedly mounted on the pump shaft, sleeve inner ring surface on offering spiral chute on the outer ring surface of spiral pump ring and being fixedly mounted on the bearing housing front end-plate cooperates the formation volute pump, the cooling medium of front end robot seal arrangement installation cavity C and bearing housing inner chamber B is carried out pumping circulation, the heat that the rolling bearing of front end robot seal arrangement friction ring and front end the is produced cooling of dispelling the heat; Between bearing housing end plate and pump shaft, be provided with another spiral pump ring, on the bearing housing end plate, offer the backflow/throttle orifice that communicates with rear robot seal arrangement installation cavity D, the spiral pump ring is fixedly mounted on the pump shaft, sleeve inner ring surface on offering spiral chute on the outer ring surface of spiral pump ring and being fixedly mounted on the bearing housing end plate cooperates formation volute pump/reversing pump square auger pump, the cooling medium of rear robot seal arrangement installation cavity D and bearing housing inner chamber B is carried out pumping circulation, the heat that the rolling bearing of rear robot seal arrangement friction ring and rear end the is produced cooling of dispelling the heat; And when this pump inlet pressure is higher, when promptly doing two stage pump, because the pressure in the bearing housing inner chamber B is higher, the spiral pump ring of this rear end can form anti-pushing force pumping, under the cooperation of backflow/throttle orifice, control reduces the pressure in rear robot seal arrangement installation cavity (the being rear robot seal arrangement gland inner chamber) D, make rear robot seal arrangement installation cavity D keep the lower pressure of relative bearing housing inner chamber B, reduce rear robot seal arrangement working pressure, improve working environment, the pressure difference of rear robot seal arrangement massage seal face front end and back end is reduced greatly, effectively control and prevent rear robot seal arrangement generation seepage, and reduce requirement greatly to the rear robot seal arrangement, fully improve the sealability of pump.

The utility model is rational in infrastructure, the front end robot seal arrangement cuts off pump cover inner chamber A and bearing housing inner chamber B, before, the rear robot seal arrangement makes bearing housing inner chamber B form Seal cage, in bearing housing inner chamber B, inject cutting oil, on bearing housing front end-plate face, offer through hole and connection is provided with pressurizer, can make pump cover inner chamber A and the bearing housing inner chamber B balance that keep-ups pressure, when the pressure of pump cover inner chamber A is big, pass through in the bearing housing inner chamber B that pressurizer-----piston cylinder is delivered to opposite side, be that the piston that the pressure of pump cover inner chamber A promotes pressurizer when big moves to opposite side, make propagation of pressure in the bearing housing inner chamber B of opposite side, make pump cover inner chamber A keep equating with the pressure of bearing housing inner chamber B, make the pressure of front end robot seal arrangement massage seal face front end and back end equate, almost there is not pressure reduction, so there is not leakage, therefore can adopt simple, the mechanical seal device that cost is low, and can guarantee sealing and working life, medium in the pump chamber can not leak among the bearing housing inner chamber B, can be to the cutting oil composite pollution among the bearing housing inner chamber B; The heat that the spiral pump ring produces front end and back end mechanical seal device friction ring and the rolling bearing cooling of dispelling the heat provides guarantee to using rolling bearing, and uses rolling bearing can improve the axial carrying capacity of pump shaft, the working life of raising pump; When this pump inlet pressure is higher, rear end spiral pump ring can be realized reverse pumping, make rear robot seal arrangement chamber D keep the lower pressure of relative bearing housing inner chamber B, the friction sealed end face of rear robot seal arrangement front end and back end is kept than small pressure difference, improve the working environment of mechanical seal device, adopt the mechanical seal device simple, that cost is low, increase the service life, and improved sealing.

The utility model good airproof performance, long service life, safe and reliable, functional good, adaptive capacity is strong, uses applicable to low, high pressure operating mode, fully satisfies operating mode occasions such as high pressure, poisonous, inflammable, explosive medium and uses.

Description of drawings

Fig. 1 is the utility model example structure schematic representation.

Fig. 2 is front end robot seal arrangement and the spiral pump ring structure signal enlarged view among Fig. 1.

Fig. 2 is rear robot seal arrangement and the spiral pump ring structure signal enlarged view among Fig. 1.

Embodiment

Be centrifugal pump shown in the accompanying drawing embodiment.The utility model includes the pump housing 1, impeller 13, pump cover 2, pump shaft 4, bearing housing 5, bearing housing 5 is by front end-plate 50, cylindrical shell 58, end plate 55 constitutes, pump shaft 4 is by rolling bearing 61,62 with the installation that is rotatably assorted of bearing housing 5 front and back end plates, in pump cover 2 inner chamber A, promptly between the front end-plate 50 of bearing housing and pump impeller wheel hub or 4 of pump shafts be provided with mechanical seal device-----front end robot seal arrangement 7, be provided with another mechanical seal device----rear robot seal arrangement 8 at bearing

housing end plate

55 and 4 of pump shafts, before, rear robot seal arrangement 7,8 make bearing housing 5 inner chamber B form airtight inner chamber, in bearing housing inner chamber B, inject cutting oil, on bearing housing front end-plate 50 plate faces, offer pressure balance through hole 52 and connection and be provided with pressurizer 20, make bearing housing inner chamber B and pump cover 2 inner chamber A pressure balances, pressurizer is made of the piston cylinder structure; Be provided with spiral pump ring 3 at bearing housing 5 inner chamber B middle (center) bearing case front end-

plates

50 and 4 of pump shafts, on bearing housing front end-plate 50, offer the return port 53 that communicates with front end robot seal arrangement installation cavity C, spiral pump ring 3 is fixedly mounted on the pump shaft 4, sleeve 51 inner ring surfaces on offering spiral chute 31 on the outer ring surface of spiral pump ring 3 and being fixedly mounted on bearing housing front end-plate 50 cooperate and form volute pump, and the cooling medium of front end robot seal arrangement installation cavity C and bearing housing inner chamber B is carried out pumping circulation; Be provided with another spiral pump ring 6 at bearing

housing end plate

55 and 4 of pump shafts, on bearing housing end plate 55, offer the backflow/throttle orifice 56 that communicates with rear robot seal arrangement installation cavity D, spiral pump ring 6 is fixedly mounted on the pump shaft 4, sleeve 54 inner ring surfaces on offering spiral chute 60 on the outer ring surface of spiral pump ring 6 and being fixedly mounted on bearing housing end plate 55 cooperate formation volute pump/reversing pump square auger pump, the cooling medium of rear robot seal arrangement installation cavity D and bearing housing inner chamber B is carried out pumping circulation, and realize that control reduces the pressure in the rear robot seal arrangement installation cavity D.

The mechanical seal device 7,8 of the utility model front and back ends is the single mechanical end face seal device, or double end-face mechanical sealing device; Be the bellows type mechanical seal device, or spring type mechanical sealing device.

Mutual bolt seal is fixedly connected constitutes by front end-plate 50, cylindrical shell 58, end plate 55 for the utility model bearing housing 5, offers cutting oil into and out of the mouth of pipe on cylindrical shell 58; On the cylindrical shell 58 of bearing housing 5, be provided with coolant jacket 59, form cooling chamber E, on cylindrical shell 58, offer cooling chamber E cooling liquid into and out of the mouth of pipe.

The utility model is provided with deflection plate 81 on the gland 80 of rear robot seal arrangement 8, to strengthen rear robot seal arrangement installation cavity D medium flow process, improve radiating effect.

The utility model is provided with sealing cover 9 in bearing housing end plate 55 outsides, and sealing cover 9 is connected by the sealing gasket bolt with bearing housing end plate 55, and the axis hole of sealing cover 9 is provided with seal ring 91 and seals with pump shaft 4, further improves sealing.

This bright returning can be gear pump, cam pump.

Claims

1, high performance mechanical canned motor pump, centrifugal pump particularly, include the pump housing (1), impeller (13), pump cover (2), pump shaft (4), bearing housing (5), it is characterized in that bearing housing (5) is by front end-plate (50), cylindrical shell (58), end plate (55) constitutes, pump shaft (4) is by rolling bearing (61,62) with bearing housing (5) before and after the end plate installation that is rotatably assorted, between the front end-plate (50) of bearing housing and pump impeller wheel hub or and pump shaft (4) between be provided with front end robot seal arrangement 7, between bearing housing end plate (55) and pump shaft (4), be provided with rear robot seal arrangement (8), before, rear robot seal arrangement (7,8) make bearing housing (5) inner chamber (B) form airtight inner chamber, on bearing housing front end-plate (50) plate face, offer pressure balance through hole (52) and connection is provided with pressurizer (20), make bearing housing inner chamber (B) and pump cover (2) inner chamber (A) pressure balance, between bearing housing inner chamber middle (center) bearing case front end-plate (50) and pump shaft (4), be provided with spiral pump ring (3), on bearing housing front end-plate (50), offer the return port (53) that communicates with front end robot seal arrangement installation cavity (C), spiral pump ring (3) is fixedly mounted on the pump shaft (4), sleeve (51) inner ring surface on offering spiral chute (31) on the outer ring surface of spiral pump ring (3) and being fixedly mounted on bearing housing front end-plate (50) cooperates the formation volute pump, the cooling medium of front end robot seal arrangement installation cavity (C) and bearing housing inner chamber (B) is carried out pumping circulation, between bearing housing end plate (55) and pump shaft (4), be provided with another spiral pump ring (6), on bearing housing end plate (55), offer the backflow/throttle orifice (56) that communicates with rear robot seal arrangement installation cavity (D), spiral pump ring (6) is fixedly mounted on the pump shaft (4), sleeve (54) inner ring surface on offering spiral chute (60) on the outer ring surface of spiral pump ring (6) and being fixedly mounted on bearing housing end plate (55) cooperates formation volute pump/reversing pump square auger pump, the cooling medium of rear robot seal arrangement installation cavity (D) and bearing housing inner chamber (B) is carried out pumping circulation, and realize that control reduces the pressure in the rear robot seal arrangement installation cavity (D).

2, high performance mechanical canned motor pump according to claim 1, it is characterized in that, bearing housing (5) offers cutting oil into and out of the mouth of pipe by front end-plate (50), cylindrical shell (58), the mutual fixedly connected formation of bolt seal of end plate (55) on cylindrical shell (58); On the cylindrical shell (58) of bearing housing (5), be provided with coolant jacket (59), form cooling chamber (E), on cylindrical shell (58), offer cooling chamber (E) cooling liquid into and out of the mouth of pipe.

3, high performance mechanical canned motor pump according to claim 1 and 2 is characterized in that, inside and outside mechanical seal device (7,8) is the single mechanical end face seal device, or double end-face mechanical sealing device; Be the bellows type mechanical seal device, or spring type mechanical sealing device.

4, high performance mechanical canned motor pump according to claim 1 and 2, it is characterized in that, be provided with sealing cover (9) in bearing housing end plate (55) outside, sealing cover (9) is connected by the sealing gasket bolt with bearing housing end plate (55), and the axis hole of sealing cover (9) is provided with seal ring (91) and seals with pump shaft (4).