Novel shield pump bearing

Abstract

The utility model discloses a novel shield pump bearing, which relates to the technical field of shield pump bearings and comprises a bearing body which is a sliding bearing and is mounted on a rotating shaft of a shield pump during use. The bearing body is made of tungsten-nickel-iron alloy. According to the novel shield pump bearing provided by the utility model, a silicon carbide material in the bearing is transformed into a tungsten-nickel-iron alloy material, so that the surface hardness of the bearing is improved, the defect that the original silicon carbide material is fragile after being impacted is overcome, and after self-transformation, the operation cycle of an evaporator circulating pump and an evaporator filtering pump is prolonged from about one month to eight months; and the period is still prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of shielded pump bearings, in particular to a novel shielded pump bearing. Background Art

[0002] At present, the evaporator circulation pump and evaporator filter pump of the DMF unit are often clogged with impeller balance holes due to high solid content in the medium, which causes axial force imbalance (mainly forward).

[0003] Due to the leakage-free characteristic of the shielded pump, it uses the motor stator and rotor to energize to form a magnetic field. The rotor and impeller are connected by a shaft, and a very thin shielding sleeve is used to separate the coils of the stator and rotor from the conveying medium, thereby converting the dynamic seal into a static seal, eliminating the structure of the traditional centrifugal pump's external motor and shaft seal, and using the pressure difference to make the medium flow to the medium between the stator and the rotor to form a circulation, cooling the motor and bearings and lubricating the bearings, so the shielded pump does not require external lubrication.

[0004] Therefore, when an unbalanced axial force occurs and the shaft moves forward or backward, the friction pair between the sliding bearing and the thrust plate bears most of the unbalanced axial force. Since the friction pair between the sliding bearing and the thrust plate is made of silicon carbide, which is a ceramic material, it has the advantages of wear resistance, chemical corrosion resistance, self-lubrication, and high temperature resistance. At the same time, it has the characteristics of brittleness. Therefore, when it is subjected to instantaneous impact or excessive thrust, it will cause components to break, thereby causing equipment failure. Utility Model Content

[0005] The purpose of the utility model is to provide a novel shielded pump bearing to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A novel shielded pump bearing comprises a bearing body, wherein the bearing body is a sliding bearing and is installed on the rotating shaft of the shielded pump when in use; the bearing body is made of tungsten-nickel-iron alloy.

[0008] As a further improvement of the above solution, a notch is provided at the end portion of the bearing body.

[0009] As a further improvement of the above solution, the number of the notches is four, and the four notches are distributed in a ring array.

[0010] As a further improvement of the above solution, guide grooves are provided on the inner wall of the bearing body, and the number of the guide grooves is consistent with the number of the notches.

[0011] As a further improvement of the above solution, the guide groove is spiral, and each guide groove is connected to the corresponding notch.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model provides a new shielded pump bearing. By transforming the silicon carbide material in the bearing into a tungsten-nickel-iron alloy material, not only the surface hardness is improved, but also the weakness of the original silicon carbide material that is easily brittle under impact is solved. After the transformation, the operating cycle of the evaporator circulation pump and the evaporator filter pump is extended from about 1 month to 8 months, and the cycle is still being extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of a new type of shielded pump bearing.

[0015] Figure 2 This is a top view of a new type of shielded pump bearing.

[0016] In the figure: 1. bearing body; 2. notch; 3. guide groove. DETAILED DESCRIPTION

[0017] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0018] Example, see Figure 1 and Figure 2 A novel shielded pump bearing includes a bearing body 1, which is a sliding bearing and is installed on the rotating shaft of the shielded pump when in use; the bearing body 1 is made of tungsten-nickel-iron alloy. The tungsten-nickel-iron alloy is an alloy based on tungsten (about 90-98%) and added with nickel, iron, copper or other components, and has a specific gravity of 17.0-18.5.

[0019] By transforming the silicon carbide material in the bearing into tungsten-nickel-iron alloy material, not only its surface hardness is improved, but also the weakness of the original silicon carbide material that is easily brittle under impact is solved. Since the transformation, the operating cycle of the evaporator circulation pump and the evaporator filter pump has been extended from about 1 month to 8 months, and the cycle is still being extended.

[0020] The end portion of the bearing body 1 is provided with a notch 2. The number of the notches 2 is four, and the four notches 2 are distributed in a circular array. The inner wall of the bearing body 1 is provided with a guide groove 3, and the number of the guide grooves 3 is the same as the number of the notches 2; the guide groove 3 is spiral, and each guide groove 3 is connected to the corresponding notch 2.

[0021] By providing four slots 2 at the end portion of the bearing body 1 and providing a spiral guide groove 3 on the inner wall of the bearing body 1 corresponding to each slot 2, the medium can flow from the slot 2 into the guide groove 3, which can increase the cooling effect on the motor and the bearing and play a role in bearing lubrication.

Claims

1. A new type of shielded pump bearing, characterized in that: It comprises a bearing body (1), which is a sliding bearing and is installed on the rotating shaft of a shielded pump when in use; the bearing body (1) is made of tungsten-nickel-iron alloy.

2. A new canned motor pump bearing according to claim 1, characterized in that: The end portion of the bearing body (1) is provided with a notch (2).

3. A new canned motor pump bearing according to claim 2, characterized in that: The number of the notches (2) is four, and the four notches (2) are distributed in a ring array.

4. A new canned motor pump bearing according to claim 3, characterized in that: The inner wall of the bearing body (1) is provided with guide grooves (3), and the number of the guide grooves (3) is consistent with the number of the notches (2).

5. A new canned motor pump bearing according to claim 4, characterized in that: The guide groove (3) is spiral-shaped, and each guide groove (3) is connected to the corresponding notch (2).

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