CN210484074U - Middle-open two-stage pump - Google Patents

Abstract

The utility model provides a well open secondary pump, which comprises a pump body, pump shaft and impeller, still open the autologous water supply port of inner chamber intercommunication on the pump body, pipeline intercommunication water seal pipe part on the autologous water supply port, the pipeline one end and the autologous water supply port intercommunication of water seal pipe part, the other end has the mouth of pipe that washes, wash the mouth of pipe and peg graft and correspond packing structure department and communicate with packing structure at the pump body, the pump shaft tip is connected with seal housing through the bearing rotation, pump shaft both ends tip still stretches out seal housing respectively and rotates and be connected with the fan, seal housing outer end is sealed with the pump shaft through labyrinth seal structure. The utility model has the advantages of reasonable design, adopt the self power of during operation pump shaft, drive the fan and rotate and dispel the heat, usable autologous water supply simultaneously effectively washes packing position department, and washes convenient operation swiftly, causes the condition of pump shaft wearing and tearing after avoiding silt dust to get into, effectively prolongs the life of well opening secondary pump.

Description

Middle-open two-stage pump

Technical Field

The utility model relates to a well open pump technical field especially relates to a well open secondary pump.

Background

The split pump has large medium conveying flow, and can be applied to occasions needing to convey medium with large flow, such as mines, underground and the like. Generally, a mid-open pump impeller is mounted in a pump casing and fastened to a pump shaft, and the pump shaft is directly driven by a motor. When the pump is used in mines and underground wells, the working environment usually has more dust, silt and the like due to severe environment, and meanwhile, the quantity of clean water sources is less, and the clean water sources need to be additionally introduced from the ground or the outside. The heat dissipation at two ends of a pump shaft of a common split pump adopts water cooling heat dissipation, a large amount of clean water sources need to be consumed, and the condition of insufficient supply exists. The connection between the pump cover and the pump shaft is typically sealed with packing. However, under the condition that a large amount of dust and silt in mines and underground are not polluted, the inward erosion of the dust and the silt from the position of the filler cannot be completely avoided due to the filler sealing, and after the dust and the silt enter from the filler, when the pump shaft rotates, the abrasion is easy to occur, so that the service life is shortened.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: in order to overcome prior art not enough, the utility model provides an utilize pump shaft rotation power to drive the fan and carry out the forced air cooling heat dissipation to the pump body, utilize the autologous water supply to wash filler department simultaneously, reduce dust silt and erode the well second grade pump of the pump shaft wearing and tearing that cause connecting filler department.

The utility model provides a technical scheme that its technical problem adopted is: a middle-open secondary pump comprises a pump body and a pump shaft, wherein the pump body is hollow inside and provided with an inner cavity, the pump shaft penetrates through the pump body, an impeller is fixed on the pump shaft, one side of the pump body is provided with a water inlet, the other side of the pump body is provided with a water outlet, two ends of the pump body and the pump shaft are rotationally sealed through bearings, inner rings of the bearings are fixed with the pump shaft, outer rings of the bearings are connected with bushings, and the bushings are hermetically connected with the pump body through a packing structure; the pump body is also provided with an autologous water supply port with an inner cavity communicated, a pipeline on the autologous water supply port is communicated with a water seal pipe component, one end of the pipeline of the water seal pipe component is communicated with the autologous water supply port, the other end of the pipeline of the water seal pipe component is provided with a flushing pipe port, the flushing pipe port is inserted in the position of the pump body corresponding to the packing structure and is communicated with the packing structure, the packing structure comprises a packing ring, a packing layer and a packing press ring, the packing ring and the corresponding ring are arranged at the lower position of the flushing pipe port in a surrounding manner, the packing layer is positioned between the inner wall of the pump body and the outer ring of the bearing, and the packing press ring is positioned at two ends of the packing layer along the axial direction; the end part of the pump shaft is rotationally connected with a sealing shell through a bearing, the end parts of the two ends of the pump shaft respectively extend out of the sealing shell and are rotationally connected with a fan, the outer end of the sealing shell is sealed with the pump shaft through a labyrinth sealing structure, the labyrinth sealing structure comprises an inner sealing element and an outer sealing element, the outer peripheral surface of the inner sealing element is embedded and matched with the sealing shell, the inner peripheral surface of the inner sealing element is in clearance fit with the outer peripheral surface of the pump shaft, the outer sealing piece is pressed at the outer end of the inner sealing piece in a pressing mode, the radial length of the outer sealing piece along the pump shaft is larger than that of the inner sealing piece, the outer edge outer buckle of the outer sealing piece is in labyrinth seal with the outer end of the inner sealing piece, and the outer sealing piece and the inner sealing piece are in labyrinth seal, and the labyrinth clearance positions of the outer sealing piece and the inner sealing piece are symmetrically and concavely provided with embedded grooves, and an O-shaped ring for sealing the labyrinth clearance between the outer sealing element and the inner sealing element is arranged in the embedded groove.

Furthermore, in order to facilitate the sealing of the inner sealing element and the outer sealing element, the outer peripheral surface of the inner sealing element is also provided with an inner groove, and an O-shaped ring which is connected between the inner sealing element and the sealing shell in a sealing way is arranged in the inner groove; the inner peripheral surface of the outer sealing piece is in clearance fit with the pump shaft, the inner peripheral surface of the outer sealing piece is provided with an inner groove, and an O-shaped ring which is connected between the outer sealing piece and the pump shaft in a sealing mode is arranged in the inner groove.

Furthermore, in order to facilitate the flushing of the position of the filler according to the requirement, a valve for controlling the on-off of the pipeline is arranged on the pipeline of the water seal pipe component.

The beneficial effects of the utility model are that, the utility model provides a well open secondary pump, structural design is reasonable, adopts the self power of during operation pump shaft, drives the fan and rotates and dispel the heat, and usable autologous water supply effectively washes packing position department simultaneously, and washes convenient operation swiftly, causes the condition of pump shaft wearing and tearing after avoiding silt dust to get into, effectively prolongs the life of well open secondary pump.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of the preferred embodiment of the present invention.

Fig. 2 is an enlarged schematic view at a in fig. 1.

Fig. 3 is an enlarged schematic view at B in fig. 1.

In the figure, the device comprises a pump body 1, a water seal pipe component 3, a pump shaft 4, a flushing pipe orifice 5, a packing ring 6, a packing layer 7, a packing press ring 8, a sealing shell 9, an inner sealing element 10, an outer sealing element 11, an O-shaped ring 12, an embedded groove 13, a valve 14, an autologous water supply port 15 and a fan.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

The middle-open two-stage pump as shown in fig. 1 to 3 is the most preferred embodiment of the present invention, and includes a pump body 1 with an inner cavity in the inner cavity and a pump shaft 3 disposed through the pump body 1. The pump shaft 3 on be fixed with the impeller, pump body 1 one side have the water inlet, the opposite side has the delivery port, pump body 1 both ends and pump shaft 3 between through bearing rotation seal, the bearing inner race fixed with pump shaft 3, the bearing outer lane be connected with the bush, the bush passes through packing structure and pump body 1 sealing connection.

The pump body 1 on still open autologous water supply mouth 14 that the inner chamber communicates, pipeline intercommunication water seal pipe part 2 is gone up to autologous water supply mouth 14, in order to wash filler position department according to the demand for the convenience, the pipeline of water seal pipe part 2 on be equipped with the valve 13 of control pipeline break-make.

In the actual design, the autologous water supply port 14 can be connected with a four-way joint, two sides of the four-way joint respectively correspond to the water seal pipe parts 2 at two ends of the pump shaft 3, and the other end of the four-way joint can be correspondingly connected with a pipeline which is also provided with a valve 13, so that the inside and the outside of the pump body 1 can be communicated as required.

The pipeline one end of water seal pipe part 2 and 14 intercommunications of autologous feed water inlet, the other end have and wash mouth of pipe 4, wash mouth of pipe 4 peg graft and correspond the filler structure department and communicate with the filler structure at the pump body 1, the filler structure then include from filler ring 5, packing layer 6 and packing clamping ring 7, filler ring 5 with correspond to encircle to set up and wash mouth of pipe 4 below position department, packing layer 6 be located between 1 inner wall of the pump body and the bearing outer lane, packing clamping ring 7 be located packing layer 6 along 3 axial both ends of pump shaft and with 6 crimping of packing layer in the space that the pump body 1, packing ring 5 and bush outer peripheral face formed.

The end part of the pump shaft 3 is rotatably connected with a sealing shell 8 through a bearing, the end parts of the two ends of the pump shaft 3 respectively extend out of the sealing shell 8 and are rotatably connected with a fan 15, the outer end of the sealing shell 8 is sealed with the pump shaft 3 through a labyrinth sealing structure, the labyrinth sealing structure comprises an inner sealing piece 9 and an outer sealing piece 10, the outer peripheral surface of the inner sealing element 9 is embedded and matched with the sealing shell 8, the inner peripheral surface is in clearance fit with the outer peripheral surface of the pump shaft 3, the outer sealing piece 10 is pressed at the outer end of the inner sealing piece 9 in a pressing mode, the length of the outer sealing piece 10 in the radial direction of the pump shaft 3 is larger than that of the inner sealing piece 9, the outer edge of the outer sealing piece 10 is buckled with the outer end of the inner sealing piece 9, the outer sealing piece 10 and the inner sealing piece 9 are in labyrinth seal, and the labyrinth clearance positions of the outer sealing element 10 and the inner sealing element 9 are symmetrically and internally provided with embedded grooves 12, the insertion groove 12 has therein an O-ring 11 which seals the labyrinth gap between the outer seal 10 and the inner seal 9. In order to facilitate the sealing of the inner sealing element 9 and the outer sealing element 10, the outer circumferential surface of the inner sealing element 9 is also provided with an inner groove, and an O-shaped ring 11 which is connected between the inner sealing element 9 and the sealing shell 8 in a sealing way is arranged in the inner groove; the inner peripheral surface of the outer sealing piece 10 is in clearance fit with the pump shaft 3, an inner groove is formed in the inner peripheral surface of the outer sealing piece 10, and an O-shaped ring 11 which is connected between the outer sealing piece 10 and the pump shaft 3 in a sealing mode is arranged in the inner groove.

The middle-open secondary pump designed in this way is reasonable in structural design, and in the actual use process, the self power of the pump shaft 3 in the working process is adopted to drive the fan 15 to rotate for heat dissipation. Because the adoption labyrinth seal structure of 3 tip of pump shaft, can effectively avoid 15 when rotating of fan, the entering of 3 tip of pump shaft is followed to dust silt, and labyrinth seal structure has prolonged the circuit length that dust silt got into 8 required marchs of sealed casing on the one hand, and the O type circle 11 that still designs separately in labyrinth seal structure inside simultaneously can further improve sealed effect, improves dustproof ability. And when the position of packing silt is more, then usable autologous water supply, open valve 13, the rivers of the pump body 1 inner chamber get into water seal pipe part 2 from autologous water supply port 14 to effectively wash position department of packing, wash convenient operation is swift. Can wash away the silt of filler position department clean, avoid silt dust to get into the back and cause the condition of pump shaft 3 wearing and tearing, effectively prolong the life of well second grade pump. The valve 13 is opened according to the flushing requirement, when the pump body 1 works normally and is not opened for flushing, the valve 13 is in a closed state, and the normal use of the split secondary pump cannot be influenced.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (3)

1. The utility model provides a well open secondary pump, includes that inside cavity has pump body (1) of inner chamber and runs through pump shaft (3) that pump body (1) set up, pump shaft (3) on be fixed with the impeller, pump body (1) one side water inlet has, the opposite side has delivery port, its characterized in that: the pump is characterized in that the two ends of the pump body (1) are rotationally sealed with the pump shaft (3) through bearings, the inner ring of each bearing is fixed with the pump shaft (3), the outer ring of each bearing is connected with a bushing, and the bushing is hermetically connected with the pump body (1) through a packing structure; the pump body (1) on still open autologous supply port (14) that has the inner chamber intercommunication, pipeline intercommunication water seal pipe part (2) on autologous supply port (14), the pipeline one end and autologous supply port (14) intercommunication, the other end of water seal pipe part (2) have and wash mouth of pipe (4), wash mouth of pipe (4) peg graft and correspond filler structure department and communicate with filler structure at the pump body (1), filler structure then include from filler ring (5), packing layer (6) and packing clamping ring (7), filler ring (5) and correspond to encircle to set up and wash mouth of pipe (4) below position department, packing layer (6) be located between pump body (1) inner wall and bearing inner race, packing clamping ring (7) be located pump shaft (3) axial both ends and with packing layer (6) crimping in pump body (1), packing layer (6) are pressed on pump body (1), The packing ring (5) and the outer peripheral surface of the bushing form a space; the pump shaft (3) tip be connected with seal housing (8) through the bearing rotation, pump shaft (3) both ends tip still stretch out seal housing (8) respectively and swivelling joint has fan (15), seal housing (8) outer end is sealed with pump shaft (3) through labyrinth seal structure, labyrinth seal structure include interior sealing member (9) and outer sealing member (10), interior sealing member (9) outer peripheral face and seal housing (8) embedding cooperation, inner peripheral face then with pump shaft (3) outer peripheral face clearance fit, outer sealing member (10) crimping in sealing member (9) outer end and outer sealing member (10) be greater than interior sealing member (9) radial length along pump shaft (3) radial length, the outer fringe of outer sealing member (10) is detained outward and is sealed for the labyrinth with interior sealing member (9) outer end and outer sealing member (10) and interior sealing member (9), and labyrinth clearance positions of the outer sealing piece (10) and the inner sealing piece (9) are symmetrically and concavely provided with embedded grooves (12), and O-shaped rings (11) for sealing the labyrinth clearance between the outer sealing piece (10) and the inner sealing piece (9) are arranged in the embedded grooves (12).

2. The split-start secondary pump of claim 1, wherein: the outer peripheral surface of the inner sealing piece (9) is also provided with an inner groove, and an O-shaped ring (11) which is connected between the inner sealing piece (9) and the sealing shell (8) in a sealing way is arranged in the inner groove; the inner circumferential surface of the outer sealing piece (10) is in clearance fit with the pump shaft (3), an inner groove is formed in the inner circumferential surface of the outer sealing piece (10), and an O-shaped ring (11) which is connected between the outer sealing piece (10) and the pump shaft (3) in a sealing mode is arranged in the inner groove.

3. The split-start secondary pump of claim 1, wherein: and a valve (13) for controlling the on-off of the pipeline is arranged on the pipeline of the water seal pipe component (2).

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