CN212600020U - Plasma surfacing cladding structure for outer side surface of middle spiral sleeve of self-balancing pump - Google Patents
Plasma surfacing cladding structure for outer side surface of middle spiral sleeve of self-balancing pump Download PDFInfo
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- CN212600020U CN212600020U CN202020581573.9U CN202020581573U CN212600020U CN 212600020 U CN212600020 U CN 212600020U CN 202020581573 U CN202020581573 U CN 202020581573U CN 212600020 U CN212600020 U CN 212600020U
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- plasma surfacing
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- spiral shell
- middle spiral
- outer side
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Abstract
The utility model discloses a spiral shell lateral surface plasma surfacing cladding structure in middle of self-balancing pump, including middle spiral shell (1), rectangle labyrinth recess (2) and plasma surfacing cladding (3), wherein adopt the machining mode to set up a plurality of rectangle labyrinth recess (2) at the lateral surface of middle spiral shell (1), the mode that adopts the plasma surfacing welds Ni60 metal powder in the protruding position of rectangle labyrinth recess (2), wherein the width of rectangle labyrinth recess (2) is 2.5mm, the degree of depth is 1.5mm, distance between two adjacent rectangle labyrinth recesses (2) is 5~8mm, the thickness of plasma surfacing cladding (3) is 1 mm. The coating structure has good wear resistance and simple preparation process.
Description
Technical Field
The utility model belongs to the technical field of plasma surface modification, concretely relates to spiral shell lateral surface plasma surfacing cladding structure in middle of self-balancing pump.
Background
The rotor system of radial type stator self-balancing multistage centrifugal pump mainly includes pump shaft, axle sleeve and parts such as impeller, and goes out the water section and install in the intermediate position of whole pump unit, wherein the screw shell in the middle of rotor system's intermediate position installation, this middle screw shell forms friction pair with the spiral section of thick bamboo of going out water section medial surface installation with clearance fit's mode, and this friction pair plays two effects: firstly, high-pressure water and low-pressure water are respectively arranged on two sides of the friction pair, and the friction pair has a small and long gap, so that the sealing effect is achieved, the high-pressure water is prevented from flowing towards the direction of the low-pressure water, and the interstage sealing effect is achieved; secondly, when the radial guide vane self-balancing multistage centrifugal pump operates, a friction effect is formed between the middle spiral sleeve and the spiral cylinder of the pump shaft so as to limit radial runout of the pump shaft and play a role in supporting bending of the pump shaft. At present, the friction and the abrasion between the middle spiral casing and the spiral cylinder of the radial guide vane self-balancing multistage centrifugal pump show that the outer surface of the middle spiral casing is abraded seriously, and once the gap between the friction pair is larger than the designed gap size, the effect of supporting a pump shaft cannot be played, so that the serious vibration of the pump shaft is caused, and the safe and stable operation of a mine drainage system is threatened.
In view of this, it is urgently needed to improve the wear resistance of the outer surface of the middle spiral casing of the radial guide vane self-balancing multistage centrifugal pump, so that the service life of the whole pump unit is prolonged, and the safe and stable operation of the pump unit is ensured.
Disclosure of Invention
An object of the utility model is to provide a spiral shell lateral surface plasma build-up welding coating structure in middle of self-balancing pump adopts labyrinth structure and plasma build-up welding coating matched with mode, improves the purpose of spiral shell lateral surface wear resistance in the middle of the self-balancing pump.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the utility model provides a spiral shell lateral surface plasma surfacing cladding layer structure in middle of self-balancing pump, includes middle spiral shell, rectangle maze recess and plasma surfacing cladding, wherein adopts the machining mode to set up a plurality of rectangle maze recess at the lateral surface of middle spiral shell, adopts the mode of plasma surfacing to pile up Ni60 metal powder in the protruding position of rectangle maze recess.
The width of rectangle maze recess be 2.5mm, the degree of depth be 1.5mm, the distance between two adjacent rectangle maze recesses is 5~8 mm.
The thickness of the plasma surfacing coating is 1 mm.
Drawings
Fig. 1 is the utility model discloses a schematic diagram of a helical casing lateral surface plasma surfacing coating structure in middle of self-balancing pump.
Labeled as: 1: a middle spiral sleeve; 2: a rectangular labyrinth groove; 3: plasma overlaying the cladding.
Detailed Description
An embodiment of the present invention is further described below with reference to fig. 1:
the utility model provides a spiral shell lateral surface plasma surfacing cladding layer structure in middle of self-balancing pump, includes middle spiral shell 1, rectangle maze recess 2 and plasma surfacing cladding layer 3, wherein adopts the machining mode to set up a plurality of rectangle maze recess 2 at the lateral surface of middle spiral shell 1, adopts the mode of plasma surfacing to build up Ni60 metal powder in the protruding position of rectangle maze recess 2.
The width of the rectangular labyrinth grooves 2 is 2.5mm, the depth is 1.5mm, and the distance between every two adjacent rectangular labyrinth grooves 2 is 5-8 mm.
The thickness of the plasma surfacing coating 3 is 1 mm.
Claims (3)
1. The utility model provides a spiral shell lateral surface plasma surfacing cladding structure in middle of self-balancing pump, includes middle spiral shell (1), rectangle labyrinth recess (2) and plasma surfacing cladding (3), its characterized in that: a plurality of rectangular labyrinth grooves (2) are formed in the outer side face of the middle spiral sleeve (1) in a machining mode, and Ni60 metal powder is welded on the protruding positions of the rectangular labyrinth grooves (2) in a plasma surfacing mode.
2. The outer side surface plasma surfacing coating structure of the middle spiral sleeve of the self-balancing pump according to claim 1 is characterized in that: the width of the rectangular labyrinth grooves (2) is 2.5mm, the depth of the rectangular labyrinth grooves is 1.5mm, and the distance between every two adjacent rectangular labyrinth grooves (2) is 5-8 mm.
3. The outer side surface plasma surfacing coating structure of the middle spiral sleeve of the self-balancing pump according to claim 1 is characterized in that: the thickness of the plasma surfacing coating (3) is 1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020581573.9U CN212600020U (en) | 2020-04-18 | 2020-04-18 | Plasma surfacing cladding structure for outer side surface of middle spiral sleeve of self-balancing pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020581573.9U CN212600020U (en) | 2020-04-18 | 2020-04-18 | Plasma surfacing cladding structure for outer side surface of middle spiral sleeve of self-balancing pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212600020U true CN212600020U (en) | 2021-02-26 |
Family
ID=74703006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020581573.9U Active CN212600020U (en) | 2020-04-18 | 2020-04-18 | Plasma surfacing cladding structure for outer side surface of middle spiral sleeve of self-balancing pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212600020U (en) |
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2020
- 2020-04-18 CN CN202020581573.9U patent/CN212600020U/en active Active
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