Protective structure for motor of coal mining machine

Abstract

The utility model discloses a protection structure for a motor of a coal mining machine. The protection structure comprises a safety valve and a cooling protection unit, the cooling protection unit comprises a protection jacket and a cooling water channel; the protective jacket comprises two protective jacket semi-rings and a protective positioning plate, the cooling water channel comprises a plurality of cooling partition plates, and a snakelike water channel for cooling water to flow is formed between every two adjacent cooling partition plates. According to the utility model, the outer side of the motor of the coal mining machine is provided with the protective outer sleeve semi-ring and the protective positioning plate which are connected in a welded manner, so that local deformation of the outer water jacket caused by the fact that the pressure on the unit area of the motor cooling outer water jacket exceeds the compressive strength of the steel plate of the outer water jacket can be avoided; the pressure of the cooling water can be prevented from exceeding the designed bearing maximum pressure of the motor, so that the swelling phenomenon in use can be avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal mining equipment, and particularly relates to a protection structure for a coal mining machine motor. Background Art

[0002] Under the harsh working environment conditions of coal mines, as an important part of coal mining machines, explosion-proof motors for mines are inevitably damaged. However, due to local "swelling and bulging" of the motor and rust between the motor positioning surface and the component housing, it is difficult to disassemble the motor, and in some cases, it is even impossible to disassemble. Only the housing or a part of the motor can be cut off destructively for removal. Replacing the motor takes a long time, which not only increases the labor intensity of underground workers but also causes significant economic losses to the mine. The "swelling and bulging" phenomenon often occurs in coal mining machine motors, mainly because the pressure per unit area on the outer water jacket for motor cooling exceeds the pressure resistance strength of the outer water jacket steel plate, resulting in local deformation of the outer water jacket. On the one hand, the main reasons for the deformation are the unreasonable welding structure and process of the cooling water channels. On the other hand, there is no safety valve designed in the motor water inlet, and the cooling water pressure exceeds the maximum designed bearing pressure of the motor. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a protection structure for a coal mining machine motor aiming at the deficiencies in the above-mentioned prior art. By arranging a protective jacket half-ring and a protective positioning plate connected by welding on the outside of the coal mining machine motor, it is possible to avoid the pressure per unit area on the outer water jacket for motor cooling exceeding the pressure resistance strength of the outer water jacket steel plate, resulting in local deformation of the outer water jacket. At the same time, a safety valve is arranged at the water inlet of the motor cooling water path to prevent the cooling water pressure from exceeding the maximum designed bearing pressure of the motor, thereby avoiding the "swelling and bulging" phenomenon during use. A safety valve is arranged at the water inlet of the motor cooling water path, and the set value of the safety valve is less than or equal to the rated pressure of the motor design to prevent overpressure of the inlet water pressure and damage and deformation of the motor housing.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is: a protection structure for a coal mining machine motor, characterized in that: it includes a safety valve arranged at the water inlet of the motor cooling water path and a cooling protection unit arranged on the outside of the coal mining machine motor;

[0005] The cooling protection unit includes a protective jacket arranged on the outside of the coal mining machine motor and a cooling water channel arranged between the protective jacket and the coal mining machine motor;

[0006] The protective jacket includes two protective jacket half-rings symmetrically arranged on the outside of the coal mining machine motor and a protective positioning plate arranged at the ends of the two protective jacket half-rings. The two protective jacket half-rings and the protective positioning plate enclose a protective cavity for protecting the coal mining machine motor. The two protective jacket half-rings are connected by welding, and the protective jacket half-ring and the protective positioning plate are connected by welding;

[0007] The cooling water channels include a plurality of cooling partition plates arranged between the semi-circular protective jacket and the shearer motor. The plurality of cooling partition plates are arranged along the circumferential direction of the shearer motor, and a serpentine water channel for the cooling water to flow is formed between two adjacent cooling partition plates.

[0008] The above-mentioned protective structure for a shearer motor is characterized in that: the semi-circular protective jacket includes a plurality of protective arc plates connected in sequence. Adjacent two protective arc plates are connected by welding, and the plurality of protective arc plates enclose a semi-circular structure.

[0009] The above-mentioned protective structure for a shearer motor is characterized in that: a water inlet is formed on the protective positioning plate, and the water inlet is communicated with one of the serpentine water channels.

[0010] The utility model has the following advantages compared with the prior art:

[0011] 1. By arranging the semi-circular protective jacket and the protective positioning plate connected by welding on the outer side of the shearer motor, the utility model can avoid the local deformation of the outer water jacket of the motor cooling caused by the pressure per unit area of the outer water jacket exceeding the pressure resistance strength of the outer water jacket steel plate. At the same time, a safety valve is arranged at the water inlet of the motor cooling water circuit to prevent the cooling water pressure from exceeding the maximum designed bearing pressure of the motor, thereby avoiding the phenomenon of "swelling and bulging" during use.

[0012] 2. A safety valve is arranged at the water inlet of the motor cooling water circuit in the utility model, and the set value of the safety valve is less than or equal to the designed rated pressure of the motor, preventing the inlet water pressure from exceeding the pressure and causing damage and deformation to the motor housing.

[0013] In summary, by arranging the semi-circular protective jacket and the protective positioning plate connected by welding on the outer side of the shearer motor, the utility model can avoid the local deformation of the outer water jacket of the motor cooling caused by the pressure per unit area of the outer water jacket exceeding the pressure resistance strength of the outer water jacket steel plate. At the same time, a safety valve is arranged at the water inlet of the motor cooling water circuit to prevent the cooling water pressure from exceeding the maximum designed bearing pressure of the motor, thereby avoiding the phenomenon of "swelling and bulging" during use; a safety valve is arranged at the water inlet of the motor cooling water circuit, and the set value of the safety valve is less than or equal to the designed rated pressure of the motor, preventing the inlet water pressure from exceeding the pressure and causing damage and deformation to the motor housing.

[0014] Next, through the drawings and embodiments, the technical solutions of the utility model will be further described in detail. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the connection relationship between the protective jacket and the cooling water channels of the utility model.

[0016] Figure 2Schematic diagram of the layout positions of the semi-circular protective jacket and the cooling water channels of the present utility model.

[0017] Explanation of reference numerals in the drawings:

[0018] 1 - Semi-circular protective jacket; 2 - Protective arc plate; 3 - Cooling partition plate;

[0019] 4 - Serpentine water channel; 5 - Protective positioning plate; 6 - Water inlet;

[0020] 7 - Weld seam; 8 - Isolation ring. Specific implementation manner

[0021] As Figure 1 and Figure 2 shown, the present utility model includes a safety valve provided on the water inlet 6 of the motor cooling water circuit and a cooling protection unit provided outside the coal shearer motor;

[0022] The cooling protection unit includes a protective jacket provided outside the coal shearer motor and a cooling water channel provided between the protective jacket and the coal shearer motor;

[0023] The protective jacket includes two semi-circular protective jackets 1 symmetrically provided outside the coal shearer motor and a protective positioning plate 5 provided at the ends of the two semi-circular protective jackets 1. The two semi-circular protective jackets 1 and the protective positioning plate 5 enclose a protective cavity for protecting the coal shearer motor. The two semi-circular protective jackets 1 are connected by welding, and the semi-circular protective jacket 1 and the protective positioning plate 5 are connected by welding;

[0024] The cooling water channel includes a plurality of cooling partition plates 3 provided between the semi-circular protective jacket 1 and the coal shearer motor. The plurality of cooling partition plates 3 are arranged along the circumferential direction of the coal shearer motor, and a serpentine water channel 4 for the cooling water to flow is formed between two adjacent cooling partition plates 3.

[0025] During actual use, by providing a semi-circular protective jacket 1 and a protective positioning plate 5 connected by welding on the isolation ring 8 outside the coal shearer motor, it is possible to prevent the pressure per unit area of the outer water jacket of the motor cooling from exceeding the pressure resistance strength of the outer water jacket steel plate, resulting in local deformation of the outer water jacket. At the same time, by providing a safety valve on the water inlet 6 of the motor cooling water circuit, it is possible to prevent the cooling water pressure from exceeding the maximum designed bearing pressure of the motor, thereby avoiding the phenomenon of "swelling and bulging" during use.

[0026] Among them, by providing a safety valve on the water inlet 6 of the motor cooling water circuit, the set value of the safety valve is less than or equal to the designed rated pressure of the motor, preventing overpressure of the inlet pressure and causing damage and deformation to the motor housing.

[0027] It should be noted that the protective positioning plate 5 adopts the spraying stainless steel process, and the thickness of its stainless steel is ≥0.3 mm, which is several times the thickness of the stainless steel plating of the existing motor positioning plate. Its rust prevention ability is greatly improved, and the rust prevention effect is excellent. It can solve the problem that after the existing motor positioning plate is used for a period of time in the harsh environment of the coal mine, the stainless steel plating will be corroded or fall off, so that the motor positioning plate and the shearer shell are rusted together and difficult to disassemble.

[0028] Particularly, for the existing shearer motor, its outer water jacket is formed by welding two half rings; in terms of the welding process, it is only arranged at both ends of the outer water jacket half ring, and anti-expansion plug welds are locally arranged in the middle. Such a motor protection structure has the problems that on the one hand, the welding strength between the outer water jacket and the partition plate is insufficient or the contact between the two is not dense, there are gaps, and the water between the middle parts of the two partition plate ribs communicates with each other, reducing the cooling effect; on the other hand, due to the insufficient strength of the welds in the middle of the motor and the excessive cooling water pressure on the local unit area of the outer water jacket under the rated pressure (≤3 MPa), the outer water jacket is deformed, resulting in the "bloating and bulging" of the motor. In the present utility model, the cooling partition plate 3 is provided and widened, and the cooling partition plate 3 adopts continuous fillet welds 7 and is welded on the overall cylindrical surface of the inner wall of the machine shell. The protective arc plate 2 overlaps on the cooling partition plate 3, and the adjacent protective arc plates 2 are welded full with "U" - shaped welds 7, welding the arc plate, the cooling partition plate 3 and the adjacent arc plates into a whole. Each waterway is surrounded by an independent peripheral weld, with large welding strength, and the middle parts between adjacent waterways will not communicate with each other, and the pressure resistance ability is greatly improved. After testing, under a water pressure of 6 MPa for 15 minutes, the motor shell has no deformation. This new motor waterway manufacturing process structure can effectively solve the "bloating and bulging" problem of the motor shell.

[0029] In this embodiment, the protective outer jacket half ring 1 includes a plurality of protective arc plates 2 connected in sequence, and the adjacent two protective arc plates 2 are welded together, and the plurality of protective arc plates 2 enclose a half - ring structure.

[0030] In this embodiment, a water inlet 6 is opened on the protective positioning plate 5, and the water inlet 6 is communicated with one of the serpentine waterways 4.

[0031] The above - mentioned is only a preferred embodiment of the present utility model, and does not impose any limitation on the present utility model. Any simple modification, change and equivalent structural change made to the above - mentioned embodiments according to the technical essence of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A coal mining machine motor protection structure, characterized in that: It comprises a safety valve arranged on a water inlet (6) of a motor cooling water circuit and a cooling protection unit arranged on the outside of the coal mining machine motor; The cooling and protection unit comprises a protective jacket arranged outside the coal mining machine motor, and a cooling water channel arranged between the protective jacket and the coal mining machine motor; The protective jacket comprises two protective jacket half rings (1) symmetrically arranged on the outside of the coal mining machine motor and a protective positioning plate (5) arranged at the ends of the two protective jacket half rings (1); the two protective jacket half rings (1) and the protective positioning plate (5) enclose a protective cavity for protecting the coal mining machine motor; the two protective jacket half rings (1) are welded to each other, and the protective jacket half rings (1) and the protective positioning plate (5) are welded to each other; The cooling water channel comprises a plurality of cooling baffles (3) arranged between the protective outer casing half ring (1) and the coal mining machine motor. The plurality of cooling baffles (3) are arranged along the circumferential direction of the coal mining machine motor, and a serpentine water channel (4) for cooling water to flow is formed between two adjacent cooling baffles (3).

2. A coal mining machine motor protection structure according to claim 1, characterized in that: The protective outer jacket semi-ring (1) comprises a plurality of protective arc plates (2) connected in sequence, wherein two adjacent protective arc plates (2) are welded together, and the plurality of protective arc plates (2) form a semi-ring structure.

3. A coal mining machine motor protection structure according to claim 1, characterized in that: The protective positioning plate (5) is provided with a water inlet (6), and the water inlet (6) is connected to one of the serpentine water channels (4).

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