Novel friction pair structure for shield pump

Abstract

The utility model discloses a novel friction pair structure for a shield pump, which comprises a thrust disc, a shaft sleeve and a bearing, the shaft sleeve is sleeved on a shaft, the thrust disc and the bearing are sequentially sleeved on the shaft sleeve, the bearing is sleeved in a bearing seat, the thrust disc is sleeved in a thrust disc seat, the thrust disc seat is sleeved on the shaft, and the thrust disc seat is sleeved on the shaft. A crescent key is arranged between the shaft sleeve and the thrust disc, the crescent key is arranged on the thrust disc seat, the arc-shaped surface of the crescent key is in corresponding contact with the inner wall of the thrust disc, a crescent groove corresponding to the crescent key is formed in the edge of the end surface of one end, located on the thrust disc, of the shaft sleeve, and the plane of the crescent key is in corresponding contact with the plane of the crescent groove. The utility model has the characteristics that the shaft sleeve and the thrust disc are connected by adopting the crescent key, the connection mode is surface contact, the connection strength and load of the shaft sleeve and the thrust disc are improved, the stability is high, and the service life of the shaft sleeve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field related to electric pumps, and in particular to a novel friction pair structure for a shielded pump. Background Art

[0002] The canned motor pump has the advantages of no leakage, fully sealed structure, no need for external lubrication, compact structure and small size. The canned motor pump uses the conveying medium to cool the motor and lubricate the bearings. Under the working condition of highly corrosive medium, its friction pair uses bearings, sleeves and thrust plates. The existing friction pair uses point contact, which makes the connection strength and load of the sleeve and thrust plate low, the stability is poor, the service life of the sleeve is short, and the cost of use is increased. Utility Model Content

[0003] The utility model aims to overcome the above-mentioned shortcomings and provide a novel friction pair structure for a canned motor pump.

[0004] The technical solution adopted by the utility model to achieve the above-mentioned purpose is:

[0005] A novel friction pair structure for a shielded pump comprises a thrust plate, a sleeve and a bearing, wherein the sleeve is sleeved on the shaft, the thrust plate and the bearing are sleeved on the sleeve in sequence, the bearing is sleeved in a bearing seat, the thrust plate is sleeved in a thrust plate seat, the thrust plate seat is sleeved on the shaft, a crescent key is arranged between the sleeve and the thrust plate, the crescent key is mounted on the thrust plate seat, the arc surface of the crescent key is in corresponding contact with the inner wall of the thrust plate, the end face edge of the sleeve located at one end of the thrust plate is provided with a crescent groove corresponding to the crescent key, and the plane of the crescent key is in corresponding contact with the plane of the crescent groove.

[0006] A crescent hole is provided on the thrust disc seat, and one end of the crescent key is inserted into the crescent hole and welded into one body.

[0007] Two groups of crescent keys are symmetrically arranged between the shaft sleeve and the thrust plate, and the shaft sleeve is provided with two groups of crescent grooves corresponding to the crescent keys.

[0008] A cylindrical pin is installed between the outer wall of the thrust disc and the inner wall of the thrust disc seat, and the cylindrical pin is inserted in the thrust disc seat.

[0009] The shaft sleeve, thrust plate and bearing are all made of SiC material.

[0010] The utility model is characterized in that the shaft sleeve and the thrust plate are connected by a crescent-shaped key, the connection mode is surface contact, the connection strength and load of the shaft sleeve and the thrust plate are improved, the stability is high, and the service life of the shaft sleeve is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] Figure 2 It is a schematic diagram of the installation of the half-moon key of the present utility model.

[0013] Figure 3 It is a schematic diagram of the structure of the thrust disk seat of the present utility model.

[0014] Figure 4 It is a schematic diagram of the structure of the shaft sleeve of the present utility model.

[0015] Figure 5 is Figure 4 side view of

[0016] Wherein: 1. Thrust disk; 2. Bearing; 3. Shaft sleeve; 4. Bearing seat; 5. Half-moon key; 6. Thrust disk seat; 7. Shaft; 8. Cylindrical pin. Specific embodiments

[0017] As Figures 1-5 shown, the present utility model is a friction pair structure for a new type of canned motor pump, including a thrust disk 1, a shaft sleeve 3, and a bearing 2. The thrust disk 1, the bearing 2, and the shaft sleeve 3 are all made of SiC material, thereby improving the wear resistance and corrosion resistance of the friction pair. The shaft sleeve 2 is sleeved on the shaft 7, the thrust disk 1 and the bearing 2 are sequentially sleeved on the shaft sleeve 3, the bearing 2 is sleeved in the bearing seat 4, the thrust disk 1 is sleeved in the thrust disk seat 6, a cylindrical pin 8 is installed between the outer wall of the thrust disk 1 and the inner wall of the thrust disk seat 6, the cylindrical pin 8 is inserted into the thrust disk seat 6, and the cylindrical pin 8 plays a fixing role during the hot fitting of the thrust disk seat 6 and the thrust disk 1. The thrust disk seat 6 is sleeved on the shaft 1, a half-moon key 5 is arranged between the shaft sleeve 3 and the thrust disk 1, a half-moon hole 61 is formed in the thrust disk seat 6, one end of the half-moon key 5 is inserted into the half-moon hole 61 and welded into one body, the arc surface of the extending end of the half-moon key 5 is in corresponding contact with the inner wall of the thrust disk 1, a half-moon groove 31 corresponding to the half-moon key 5 is formed at the end face edge of the shaft sleeve 3 at one end of the thrust disk 1, and the plane of the extending end of the half-moon key 5 is in corresponding contact with the plane of the half-moon groove 31. Preferably, two groups of half-moon keys 5 are symmetrically arranged between the shaft sleeve 3 and the thrust disk 1, and two groups of half-moon grooves 31 corresponding to the half-moon keys 5 are arranged on the shaft sleeve 3.

[0018] The shaft sleeve 3 and the thrust disk 1 of the present utility model are connected by a half-moon key 5, and the connection method is surface contact, which improves the connection strength and load between the shaft sleeve 3 and the thrust disk 1, has high stability, and improves the service life of the shaft sleeve 3.

[0019] The above is only the preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present utility model, making equivalent substitutions or changes should be covered within the protection scope of the present utility model.

Claims

1. A novel friction pair structure for a canned motor pump, characterized in that: It includes a thrust plate, a sleeve and a bearing, wherein the sleeve is sleeved on the shaft, the thrust plate and the bearing are sleeved on the sleeve in sequence, the bearing is sleeved in a bearing seat, the thrust plate is sleeved in a thrust plate seat, the thrust plate seat is sleeved on the shaft, a crescent key is arranged between the sleeve and the thrust plate, the crescent key is installed on the thrust plate seat, the arc surface of the crescent key is in corresponding contact with the inner wall of the thrust plate, the end face edge of the sleeve located at one end of the thrust plate is provided with a crescent groove corresponding to the crescent key, and the plane of the crescent key is in corresponding contact with the plane of the crescent groove.

2. A novel friction pair structure for a canned motor pump as claimed in claim 1, characterized in that: A crescent hole is provided on the thrust disc seat, and one end of the crescent key is inserted into the crescent hole and welded into one body.

3. A novel friction pair structure for a canned motor pump as claimed in claim 1, characterized in that: Two groups of crescent keys are symmetrically arranged between the shaft sleeve and the thrust plate, and the shaft sleeve is provided with two groups of crescent grooves corresponding to the crescent keys.

4. A novel friction pair structure for a canned motor pump as claimed in claim 1, characterized in that: A cylindrical pin is installed between the outer wall of the thrust disc and the inner wall of the thrust disc seat, and the cylindrical pin is inserted in the thrust disc seat.

5. A novel friction pair structure for a canned motor pump as claimed in claim 1, characterized in that: The shaft sleeve, thrust plate and bearing are all made of SiC material.

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