CN2480592Y

CN2480592Y - Ammonia-shielding pump

Info

Publication number: CN2480592Y
Application number: CN 01241764
Authority: CN
Inventors: 谭福生
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-05-24
Filing date: 2001-05-24
Publication date: 2002-03-06
Anticipated expiration: 2011-05-24

Abstract

The utility model relates to a screening ammonia pump utilized in transporting liquid ammonia, which comprises a pump body and a motor. Wherein, an impeller in the pump body is arranged on a rotary shaft of a motor rotor. Two ends of the rotary shaft are respectively supported on a front bearing seat and a rear bearing seat by bearings. Two sides of the bearing are provided with shaft glands. The utility model employs a full-enclosed type, avoids leakage and damaging the motor when operating lack of liquid ammonia, and ensures a normal operating of the liquid ammonia in the process of pumpability.

Description

A kind of Ammonia-shielding pump

The utility model relates to the employed Ammonia-shielding pump of a kind of conveying ammoniacal liquor.

As everyone knows, in the feed liquid pipeline in refrigeration system, all must be fitted with ammonia pump.This class ammonia pump has two kinds usually: a kind of is gear pump, and pump shaft is not coaxial with motor shaft, but links to each other with coupling, and mechanical seal is adopted in the sealing on the pump shaft, because pump shaft rotates friction for a long time, causes the gap to increase, and makes seal failure.Another kind is the slip ammonia pump, and pump shaft and motor coaxle have added a sealing cover on the ammonia pump, though this pump has been avoided the problem of leaking, because pump shaft is to be rotated by the flip sleeve supporting, when no ammoniacal liquor moves in the pump, can produce heat with burn-down of electric motor, this brings loss to production undoubtedly.

The purpose of this utility model provides and a kind ofly do not leak, uses reliably, a kind of Ammonia-shielding pump of fragile motor not.

The utility model is achieved in that a kind of Ammonia-shielding pump, comprise the airtight continuous pump housing and motor, impeller in the pump housing is installed in the rotating shaft of rotor, it is characterized in that: the rotating shaft at rotor two ends is bearing on the forward and backward bearing support by bearing respectively, the axle envelope is equipped with in the both sides of bearing, described front-end bearing pedestal is provided with the string liquid hole that pump chamber communicates with rotor internal cavity, and rear bearing block is provided with string liquid hole and the exhaust port that rotor internal cavity communicates with storage ammonia jar reflow pipe.Described forward and backward bearing support is provided with flange, and is fastened on the two side ends of motor respectively with screw.

The utility model mainly is to have set up bearing support at the two ends of motor, makes shaft support on the rotor on the bearing of bearing support, makes the rotating shaft rotation flexibly, has reduced the heat generation, avoids lacking liquid in the system and burns motor.The both sides of described bearing are provided with the axle envelope, and the impurity in the system is difficult to enter in the bearing like this, plays buffer action, guarantee the working life of bearing.

The utility model compared with prior art has following advantage: what this pump adopted is totally enclosed type, and it has not only solved the problem of ammoniacal liquor from emerging easily between pump shaft and the Sealing, has avoided the injury of ammonia to surrounding environment and operator.Simultaneously,, solved original ammonia pump, can reduce maintenance and economic loss like this, guaranteed the normal operation of ammoniacal liquor in the process of pumping because of lacking the phenomenon that ammoniacal liquor burns motor because pump shaft can be used when no ammoniacal liquor for a long time by bearing supporting rotation.

Below in conjunction with accompanying drawing the utility model is done further narration.

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

See also accompanying drawing, as can be seen from the figure, the utility model comprises that has import and export 1,4 the pump housing 3 and motor 10, be provided with seal ring 7 between the pump housing 3 and the motor 10, and fasten as one by screw 8, impeller 2 in the pump housing is installed in the rotating shaft 21 of rotor 11, this rotating shaft 21,12 respectively by bearing 20,13 be bearing in before, rear bearing block 24, on 18, before, rear bearing block is provided with end flange, and with screw 23,16 are fastened on the two side ends of motor respectively, front-end bearing pedestal 24 is provided with string liquid hole 6, pump chamber 5 is communicated with rotor internal cavity 9, rear bearing block 18 is provided with string liquid hole 17 and exhaust port 14, makes rotor internal cavity 9 communicate described bearing 20 with storage ammonia jar reflow pipe 15, axle envelope 22 is equipped with in 13 both sides, 19.During work, ammoniacal liquor is from import 1 inspiration, under the effect of impeller 2, discharge from exporting 4, and deliver in the system and go, wherein air in the system and part ammoniacal liquor enter the 9 pairs of motors of rotor internal cavity operation cooling by the string liquid hole 6 on the front-end bearing pedestal 24, after exhaust port 14 on the rear bearing block 18 and string liquid hole 17 enter reflow pipe 15 flows back in the storage ammonia jar.

Claims

1, a kind of Ammonia-shielding pump, comprise the airtight continuous pump housing (3) and motor (10), impeller (2) in the pump housing is installed in the rotating shaft (21) of rotor (11), it is characterized in that: the rotating shaft (21 at rotor (11) two ends, 12) respectively by bearing (20,13) be bearing in before, rear bearing block (24,18) on, bearing (20,13) axle envelope (22 is equipped with in both sides, 19), described front-end bearing pedestal (24) is provided with the string liquid hole (6) that pump chamber (5) communicates with rotor internal cavity (9), and rear bearing block (18) is provided with string liquid hole (17) and the exhaust port (14) that rotor internal cavity (9) communicates with storage ammonia jar reflow pipe (15).

2, Ammonia-shielding pump according to claim 1 is characterized in that: described forward and backward bearing support (24,18) is provided with flange, and is fastened on the two side ends of motor respectively with screw (23,16).