Wear-resistant centrifugal fan shell with lining

Abstract

The wear-resistant centrifugal fan shell with the lining comprises a volute, the volute comprises a main shell body, the front side of the main shell body is fixedly connected with a shell cover, an air inlet is formed in the middle of the shell cover, and an air outlet is formed in one side of the shell cover and one side of the main shell body in a surrounding mode; a ceramic lining plate abuts against the inner wall of the main shell, the rear end face of the ceramic lining plate abuts against the rear end face of the inner side of the main shell, a plurality of annularly-distributed tooth grooves are formed in the front end face of the ceramic lining plate, a positioning boss is formed on the rear end face of the shell cover, and the positioning boss is inserted into the ceramic lining plate and abuts against the inner wall of the ceramic lining plate. And a plurality of positioning insertion teeth are formed on the outer ring of the positioning boss and are respectively inserted into the tooth grooves of the ceramic lining plate. According to the shell, the ceramic lining is arranged on the inner wall of the shell, the ceramic lining can be effectively positioned and arranged in the shell to resist abrasion based on the structure of the shell, meanwhile, the shell can be detached, replacement of the ceramic lining is facilitated, and the service life of the fan can be prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of centrifugal volute, more specifically to a wear -resisting centrifugal fan casing with lining. BACKGROUND

[0002] The centrifugal fan is a kind of driven fluid machinery, which can improve the pressure of gas and discharge gas by input mechanical energy. At present, the centrifugal fan can not only realize the conveying of airflow, but also can discharge dust or convey powdery material. For example, coal powder is conveyed by airflow. The particles in the conveying of powdery material or the discharge of dust will impact on the inner wall of the centrifugal volute under the centrifugal force and be output from the air outlet along the inner wall of the centrifugal volute. Therefore, the inner wall of the centrifugal volute is worn to different degrees.

[0003] To solve the problem of wear, the wall thickness of the casing can be thickened to improve the service life of the centrifugal fan. However, wear still exists. Therefore, some people propose to use wear-resistant material as the lining of the volute to reduce wear. Therefore, a suitable lining is needed to improve the wear resistance of the volute. The positioning and replacement of the lining should be considered during design, so as to greatly prolong the service life of the fan. SUMMARY

[0004] The utility model discloses a wear -resisting centrifugal fan casing with lining, which is provided with a ceramic lining arranged on the inner wall of the casing. Based on the structure of the casing, the ceramic lining can be effectively positioned and arranged in the casing to resist wear, thereby improving the service life of the fan.

[0005] A wear -resisting centrifugal fan casing with lining, comprising a volute, the volute comprising a main casing, a casing cover is fixed to the front side of the main casing, a circular air inlet is formed in the middle part of the casing cover, and an air outlet is formed around the casing cover and one side of the main casing. An arc-shaped ceramic lining plate is arranged on the inner wall of the main casing, and linear upper and lower link plates are formed at both ends of the ceramic lining plate. The ends of the upper and lower link plates are arranged on the upper and lower bottom surfaces of the air outlet.

[0006] A plurality of annular tooth grooves are formed on the rear end surface and the front end surface of the ceramic lining plate, and a circular positioning boss is formed on the rear end surface of the casing cover. The positioning boss is inserted into the ceramic lining plate and abuts against the inner wall of the ceramic lining plate. A plurality of positioning teeth are formed on the outer circle of the positioning boss, and the positioning teeth are inserted into the tooth grooves of the ceramic lining plate.

[0007] Preferably, the outer wall of the main shell is formed with a plurality of longitudinally arranged lugs, the front end surface of the lug is formed with a threaded hole, the outer side of the shell cover is formed with a plurality of supporting lugs corresponding to the lugs, a screw is inserted into the supporting lug, and the screw is screwed into the threaded hole of the lug.

[0008] Preferably, the outer wall of the main shell is formed with a plurality of longitudinally arranged lugs, the front end surface of the lug is formed with a threaded hole, the outer side of the shell cover is formed with a plurality of supporting lugs corresponding to the lugs, a screw is inserted into the supporting lug, and the screw is screwed into the threaded hole of the lug.

[0009] Preferably, the center axis of the air inlet on the shell cover coincides with the center axis of the positioning boss.

[0010] Preferably, the front end surface of the shell cover around the air inlet is formed with a circular annular recess, and a protective net is inserted and fixed in the recess.

[0011] The protective net comprises a "cross" shaped main protective support, the ends of the main protective support are fixed to the shell cover, a plurality of circular annular protective rings are fixed to the main protective support, and the protective rings are inserted into the air inlet of the shell cover.

[0012] Preferably, the diameter of the recess on the shell cover is smaller than the diameter of the positioning boss.

[0013] The beneficial effects of the present application are as follows:

[0014] The shell body proposes a ceramic lining arranged at the inner wall of the shell body, based on the structure of the shell body, the ceramic lining can be effectively positioned and arranged in the shell body to resist wear, thereby improving the service life of the fan; at the same time, the shell body can be disassembled, and the ceramic lining is convenient to replace. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional structure schematic diagram of the present application;

[0016] Figure 2 It is a front view cross-sectional structure schematic diagram of the present application;

[0017] Figure 3 It is a side view cross-sectional structure schematic diagram of the present application;

[0018] Figure 4 It is a rear view structure schematic diagram of the shell cover of the present application.

[0019] In the drawing: 1, main shell; 11, lug; 12, rib; 2, shell cover; 21, positioning boss; 22, positioning gear; 23, air inlet; 24, recess; 25, supporting lug; 3, ceramic lining plate; 31, gear groove; 4, screw; 5, protective net. PREFERRED EMBODIMENT

[0020] Embodiment: see Figures 1 to 4As shown in the figure, a wear-resistant centrifugal fan casing with a lining comprises a volute, the volute comprises a main casing 1, a casing cover 2 is fixed to the front side of the main casing 1, a circular air inlet 23 is formed in the middle of the casing cover 2, an air outlet is formed in one side of the casing cover 2 and the main casing 1; a circular arc-shaped ceramic lining plate 3 is abutted to the inner wall of the main casing 1, linear upper and lower link plates 32 and 33 are respectively formed in the two ends of the ceramic lining plate 3, and the ends of the upper and lower link plates 32 and 33 are respectively abutted to the upper and lower bottom surfaces inside the air outlet.

[0021] A rear end surface of the ceramic lining plate 3 is abutted to the rear end surface inside the main casing 1, a plurality of annularly distributed tooth grooves 31 are formed in the front end surface, a circular ring-shaped positioning boss 21 is formed in the rear end surface of the casing cover 2, the positioning boss 21 is inserted into the ceramic lining plate 3 and abutted to the inner wall of the ceramic lining plate 3; a plurality of positioning teeth 22 are formed in the outer circle of the positioning boss 21, and the positioning teeth 22 are respectively inserted into the tooth grooves 31 of the ceramic lining plate 3.

[0022] A plurality of longitudinally arranged ear seats 11 are formed in the outer wall of the main casing 1, threaded holes are formed in the front end surface of the ear seats 11, a plurality of supporting ears 25 opposite to the ear seats 11 are respectively formed in the outer side edges of the casing cover 2, screws 4 are inserted into the supporting ears 25, and the screws 4 are screwed and fixed into the threaded holes of the ear seats 11. Figure 1 、 2 As shown in the figure, the main casing 1 comprises a rear panel with the same shape as the casing cover 2, a longitudinal surrounding plate is formed in the rear panel except the outer side edge of the air outlet side, the surrounding plate comprises a circular arc plate and two horizontal plates, the ear seats 11 are formed not only in the outer wall of the circular arc plate but also in the outer walls of the two horizontal plates; in the above structure, the connection between the main casing 1 and the casing cover 2 is realized by the screws 4, which can facilitate the disassembly and replacement of the ceramic lining plate 3.

[0023] A plurality of transversely arranged ribs 12 are formed in the outer wall of the main casing 1, the ribs 12 and the ear seats 11 are formed together, and the ribs 12 can enhance the strength of the volute.

[0024] The central axis of the air inlet 23 and the central axis of the positioning boss 21 of the casing cover 2 coincide; meanwhile, as shown in the above figure, the surrounding plate of the main casing 1 comprises a circular arc plate, and the central axis of the circular arc plate and the central axis of the air inlet 23 also coincide.

[0025] A circular ring-shaped recess 24 is formed in the front end surface of the casing cover 2 around the air inlet 23, a protective net 5 is inserted and fixed in the recess 24, and the protective net 5 is arranged in the casing cover 2.

[0026] The protective net 5 comprises a main protective support in the shape of a cross, the middle part of the main protective support is a circular ring, and linear ventilation grooves are formed on the periphery of the support; the ends of the main protective support are fixedly connected to the shell cover 2, a plurality of circular protective rings are fixedly connected to the main protective support, the protective rings are inserted into the air inlet 23 of the shell cover 2, and the centers of all the protective rings coincide.

[0027] The diameter of the recessed platform 24 on the shell cover 2 is smaller than the diameter of the positioning boss 21, the positioning boss 21 can supplement the cutting of the recessed platform 24, and the strength of the shell cover 2 is not weakened.

[0028] Working principle: the structure is a wear-resistant centrifugal fan shell with a lining, which mainly inserts a ceramic lining plate 3 adhering to the inner wall of the main shell 1 in the main shell 1 of the volute, the ceramic lining plate 3 is radially and axially constrained based on the positioning boss 21 and the positioning gear 22 on the shell cover 2, and the ceramic lining plate 3 is stably fixed in the volute; the characteristics of the ceramic material of the ceramic lining plate 3 can enhance the wear resistance of the centrifugal fan shell.

[0029] The embodiments are used to illustrate the utility model, and are not used to limit the utility model. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the utility model, and therefore the protection scope of the utility model should be as listed in the claims of the utility model.

Claims

1. A wear-resistant centrifugal fan casing with a lining, comprising a volute, the volute comprising a main casing (1), a casing cover (2) being fixed to the front side of the main casing (1), a circular air inlet (23) being formed in the middle of the casing cover (2), and an air outlet being formed in the side of the casing cover (2) and the main casing (1); characterized in that: The inner wall of the main shell (1) is provided with a circular arc-shaped ceramic lining plate (3), the two ends of the ceramic lining plate (3) are respectively provided with linear upper and lower link plates (32, 33), and the ends of the upper and lower link plates (32, 33) are respectively abutted on the upper and lower bottom surfaces on the inner side of the air outlet; The rear end surface of the ceramic lining plate (3) is abutted on the rear end surface on the inner side of the main shell (1), and the front end surface is provided with a plurality of annularly distributed tooth grooves (31), the rear end surface of the shell cover (2) is provided with a circular ring-shaped positioning boss (21), the positioning boss (21) is inserted in the ceramic lining plate (3) and abutted on the inner wall of the ceramic lining plate (3), and the outer circle of the positioning boss (21) is provided with a plurality of positioning teeth (22), and the positioning teeth (22) are respectively inserted in the tooth grooves (31) of the ceramic lining plate (3).

2. A wear resistant centrifugal fan housing with a liner as defined in claim 1, characterized in that: The outer wall of the main shell (1) is provided with a plurality of longitudinally arranged ear seats (11), the front end surface of the ear seat (11) is provided with a threaded hole, the outer side of the shell cover (2) is respectively provided with a plurality of supporting ears (25) opposite to the ear seats (11), the supporting ears (25) are inserted and connected with screws (4), and the screws (4) are screwed and fixed in the threaded holes of the ear seats (11).

3. A wear resistant centrifugal fan housing with a liner as defined in claim 2, characterized in that: The outer wall of the main shell (1) is provided with a plurality of transversely arranged ribs (12), and the ribs (12) and the ear seats (11) are formed together.

4. A wear resistant centrifugal fan housing with a liner as defined in claim 1, characterized in that: The central axis of the air inlet (23) and the central axis of the positioning boss (21) of the shell cover (2) coincide.

5. A wear resistant centrifugal fan housing with a liner as defined in claim 4, characterized in that: The front end surface of the shell cover (2) around the air inlet (23) is provided with a circular ring-shaped recess (24), and the recess (24) is inserted and fixed with a protective net (5). The protective net (5) comprises a "cross"-shaped main protective support, the ends of the main protective support are fixedly connected to the shell cover (2), a plurality of circular ring-shaped protective rings are fixedly connected to the main protective support, and the protective rings are inserted in the air inlet (23) of the shell cover (2).

6. A wear-resistant centrifugal fan housing with a liner according to claim 5, characterized in that: The diameter of the recess (24) of the shell cover (2) is smaller than the diameter of the positioning boss (21).

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