Ceramic shell and ceramic pump

Abstract

The utility model relates to the technical field of ceramic pumps, in particular to a ceramic shell and a ceramic pump, the ceramic shell comprises a middle sleeve shell assembly, a front cover plate assembly, a rear cover plate assembly and a fixing piece, the front cover plate assembly and the rear cover plate assembly cover the two ends of the middle sleeve shell assembly, and the fixing piece is used for fixing the front cover plate assembly and the rear cover plate assembly to the middle sleeve shell assembly; the rear cover plate assembly comprises a metal rear cover plate and a ceramic rear protection plate fixed to the metal rear cover plate, a guide face with the diameter gradually increased in the direction away from the front cover plate assembly is arranged on the outer side wall of the ceramic rear protection plate, and a sealing face matched with the guide face is arranged on the middle sleeve shell assembly. According to the ceramic pump, the corrosion resistance of the ceramic pump body and the integrity of other functions can be guaranteed through independent replacement, and then the effect of reducing the maintenance cost is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of ceramic pumps, and in particular to a ceramic housing and a ceramic pump. Background Art

[0002] Ceramic pump is a kind of pump with ceramic material as the main body, which has good corrosion resistance, wear resistance and high temperature and high pressure capability. Its structure mainly includes pump body, impeller, bearing, mechanical seal and other components.

[0003] At present, ceramic pumps such as the Chinese patent with patent publication number CN117212179A disclose a slurry pump with a ductile iron combined with silicon carbide ceramic pump body, which belongs to the field of fluid equipment technology. The pump body includes a silicon carbide ceramic pump body blank, a front pump shell, a rear pump shell, a silicon carbide wear-resistant block, bolts and nuts. Among them, the silicon carbide ceramic pump body blank is placed inside the front pump shell and the rear pump shell, and the silicon carbide wear-resistant block is located in the groove of the silicon carbide ceramic pump body blank and sintered into one body with the silicon carbide ceramic pump body blank; the front pump shell and the rear pump shell are fastened and connected by bolts and nuts; the front pump shell and the rear pump shell are respectively assembled with gaps between the silicon carbide ceramic blank, and the assembly gaps are filled with resin to completely combine the front / rear pump shell with the ceramic pump body blank into a whole.

[0004] With respect to the above-mentioned related technologies, the inventors found that the above-mentioned silicon carbide ceramic pump body blank is made by one-piece sintering. Therefore, if one part is worn during use, the entire pump body needs to be replaced, which leads to higher maintenance costs. Utility Model Content

[0005] In order to solve the above technical problems, the present application provides a ceramic shell, which has the advantage of being able to be replaced separately to ensure the corrosion resistance of the ceramic pump body and the integrity of other functions, thereby reducing maintenance costs.

[0006] In order to achieve the above object, the technical solution of the utility model is as follows:

[0007] A ceramic shell comprises a middle shell assembly, a front cover assembly and a rear cover assembly provided at two ends of the middle shell, and a fixing member for fixing the front cover assembly and the rear cover assembly to the middle shell assembly;

[0008] The rear cover assembly includes a metal rear cover and a ceramic rear guard fixed on the metal rear cover. The outer wall of the ceramic rear guard is provided with a guide surface whose diameter gradually increases in the direction away from the front cover assembly. The middle shell assembly is provided with a sealing surface that cooperates with the guide surface.

[0009] The above technical solution is implemented so that the ceramic pump body is composed of three parts as a whole. When any one of the front cover assembly, the rear cover assembly and the middle shell assembly is worn, they can be replaced separately to ensure the corrosion resistance of the ceramic pump body and the integrity of other functions, and the metal rear cover is fixed and locked on the lug by fixings, so that the ceramic rear guard plate is gradually pressed against the ceramic inner tank, and the guide surface and the sealing surface are gradually pressed close to each other, thereby ensuring the sealing between the two, thereby ensuring the sealing and improving the durability at the same time.

[0010] As a preferred solution of the present application, the middle shell assembly includes a metal shell and a ceramic liner sintered and fixed on the metal shell.

[0011] To implement the above technical solution, the ceramic liner is fixed on the metal shell to ensure the precision of the connection between the ceramic liner and the metal shell, and to prevent the ceramic liner from being separated from the metal shell due to unreliable fixation, thereby causing a gap between the liner and the front cover assembly and the rear cover assembly, resulting in leakage. A plurality of lugs for mounting the fixing parts are provided on the outer peripheral side of the metal shell.

[0012] As a preferred solution of the present application, the front cover plate assembly includes a metal front cover plate and a ceramic front guard plate sintered and fixed on the metal front cover plate, and a seal is provided between the ceramic front guard plate and the ceramic inner tank.

[0013] To implement the above technical solution, the metal front cover is locked on the lug by means of screws and nuts, thereby completing the locking and fixing of the metal front cover on the middle housing assembly.

[0014] The present application also provides a ceramic pump, comprising the above-mentioned ceramic housing, an impeller arranged in the ceramic housing, and a drive shaft connected to the impeller, wherein a mechanical seal is arranged between the drive shaft and the housing.

[0015] The above technical solution can be implemented and then connected to an external driving member (motor or engine) through a coupling, so that the external driving member can drive the driving shaft to rotate, and then drive the impeller to rotate, so as to achieve the effect of extracting liquid.

[0016] As a preferred solution of the present application, the mechanical seal includes a sleeve mounted on the drive shaft and a transmission sleeve mounted on the sleeve, the transmission sleeve is provided with a dynamic ring seat, the dynamic ring seat is provided with a dynamic sealing ring, the transmission sleeve is provided with a sealing housing, the sealing housing is provided with a static ring seat, the static ring seat is provided with a static sealing ring that fits with the dynamic sealing ring, and a labyrinth sealing ring is provided between the sealing housing and the transmission sleeve.

[0017] To implement the above technical solution, the driving shaft drives the transmission sleeve and the dynamic sealing ring arranged on the transmission sleeve to fit against the static sealing ring for relative rotation and friction, thereby forming a dynamic seal to ensure the sealing effect between the driving shaft and the ceramic housing, thereby preventing leakage; and a gap is set between the transmission sleeve and the ceramic rear guard plate to prevent the liquid medium's debris from wearing the ceramic rear guard plate, thereby ensuring the service life.

[0018] As a preferred solution of the present application, a connecting column is provided at the end of the impeller, a connecting groove for inserting the driving shaft is provided on the connecting column, and a ring sleeve is provided on the stationary ring seat and is sleeved on the connecting column.

[0019] The above technical solution is implemented to prevent impurities in the medium from entering between the transmission sleeve and the drive shaft, causing wear and leakage between the two.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. The ceramic pump body is composed of three parts. When any one of the front cover plate assembly, the rear cover plate assembly and the middle shell assembly is worn, it can be replaced separately to ensure the corrosion resistance of the ceramic pump body and the integrity of other functions. The metal rear cover plate is fixed and locked on the lug by a fixing piece, so that the ceramic rear guard plate is gradually pressed against the ceramic liner, and the guide surface and the sealing surface are gradually pressed close to each other, thereby ensuring the sealing between the two, thereby ensuring the sealing and improving the durability;

[0022] 2. The driving shaft drives the transmission sleeve and the dynamic sealing ring arranged on the transmission sleeve to fit against the static sealing ring for relative rotation and friction, thereby forming a dynamic seal to ensure the sealing effect between the driving shaft and the ceramic housing, thereby preventing leakage; and a gap is set between the transmission sleeve and the ceramic rear guard plate to prevent the liquid medium's debris from wearing the ceramic rear guard plate, thereby ensuring the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application.

[0025] Figure 2 It is a schematic diagram of the internal structure of Example 1 of the present application.

[0026] Figure 3 It is a schematic diagram of the overall structure of Example 2 of the present application.

[0027] Figure 4 It is a cross-sectional view of Example 2 of the present application.

[0028] Figure 5 yes Figure 4 Schematic diagram of the structure of part A.

[0029] Figure numerals: 1. middle shell assembly; 11. metal shell; 12. ceramic liner; 13. sealing surface; 2. front cover assembly; 21. metal front cover; 22. ceramic front guard; 3. rear cover assembly; 31. metal rear cover; 32. ceramic rear guard; 33. guide surface; 4. impeller; 41. connecting column; 5. drive shaft; 6. mechanical seal; 61. shaft sleeve; 62. transmission sleeve; 63. dynamic ring seat; 64. dynamic sealing ring; 65. sealing shell; 66. static ring seat; 67. static sealing ring; 68. ring sleeve. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-5 This application is described in further detail.

[0031] Example 1

[0032] The present application embodiment discloses a ceramic housing. Figure 1 The ceramic pump body includes a middle casing assembly 1, a front cover assembly 2 and a rear cover assembly 3 covering both ends of the middle casing, and a fixing member for fixing the front cover assembly 2 and the rear cover assembly 3 to the middle casing assembly 1. That is, the ceramic pump body as a whole is composed of three parts, among which any one of the front cover assembly 2, the rear cover assembly 3 and the middle casing assembly 1 can be replaced separately when it is worn, so as to ensure the corrosion resistance of the ceramic pump body and the integrity of other functions.

[0033] The middle shell assembly 1 includes a metal shell 11 and a ceramic liner 12 sintered and fixed on the metal shell 11. That is, the ceramic liner 12 is fixed on the metal shell 11 to ensure the precision of its connection with the metal shell 11, and to prevent the ceramic liner 12 from being separated from the metal shell 11 due to unreliable fixation, thereby causing a gap between the liner and the front cover assembly 2 and the rear cover assembly 3, resulting in leakage. A number of lugs for mounting fixings are provided on the outer peripheral side of the metal shell 11.

[0034] The front cover assembly 2 includes a metal front cover 21 and a ceramic front guard 22 sintered and fixed on the metal front cover 21. A seal is provided between the ceramic front guard 22 and the ceramic liner 12. The seal is a sealing ring. The fixing member is a screw nut, that is, the metal front cover 21 is locked on the lug by the screw nut, so that the metal front cover 21 is locked and fixed on the middle shell assembly 1.

[0035] The rear cover assembly 3 includes a metal rear cover 31 and a ceramic rear guard plate 32 fixed on the metal rear cover 31. The outer wall of the ceramic rear guard plate 32 is provided with a guide surface 33 whose diameter gradually increases in the direction away from the front cover assembly 2, and the ceramic inner liner 12 is provided with a sealing surface 13 that cooperates with the guide surface 33. The metal rear cover 31 is fixed and locked on the lug by a fixing member, so that the ceramic rear guard plate 32 is gradually pressed against the ceramic inner liner 12, and the guide surface 33 and the sealing surface 13 are gradually pressed close to each other, thereby ensuring the sealing between the two. That is, the ceramic shell is composed of three parts, so that each part can be replaced separately when part of it is worn, so as to ensure the service life of the ceramic shell and prevent the situation where the whole needs to be replaced once part of it is worn.

[0036] The implementation principle of a ceramic shell in the embodiment of the present application is as follows: the metal rear cover plate 31 is fixed and locked on the lug through a fixing piece, so that the ceramic rear guard plate 32 is gradually pressed against the ceramic inner liner 12, and the guide surface 33 and the sealing surface 13 are gradually pressed close to each other, thereby ensuring the sealing between the two. That is, the entire ceramic shell is spliced ​​from three parts, so that when parts thereof are worn, each part can be replaced separately, so as to ensure the service life of the ceramic shell and prevent the situation where the entire shell needs to be replaced once a part is worn.

[0037] The present application also provides a ceramic pump, comprising the above-mentioned ceramic housing, an impeller 4 disposed in the ceramic housing, and a drive shaft 5 connected to the impeller 4, and a mechanical seal 6 is disposed between the drive shaft 5 and the housing. A coupling is disposed at the end of the drive shaft 5, and then the drive shaft 5 can be connected to an external drive member (motor or engine) through the coupling, so that the external drive member can drive the drive shaft 5 to rotate, and then drive the impeller 4 to rotate, so as to achieve the effect of extracting liquid.

[0038] The mechanical seal 6 includes a sleeve 61 sleeved on the drive shaft 5 and a transmission sleeve 62 sleeved on the sleeve 61, a dynamic ring seat 63 is provided on the transmission sleeve 62, a dynamic sealing ring 64 is provided on the dynamic ring seat 63, a sealing housing 65 is sleeved on the transmission sleeve 62, a static ring seat 66 is provided on the sealing housing 65, a static sealing ring 67 that fits with the dynamic sealing ring 64 is provided on the static ring seat 66, and a labyrinth seal is provided between the sealing housing 65 and the transmission sleeve 62. That is, the drive shaft 5 drives the transmission sleeve 62 and the dynamic sealing ring 64 provided on the transmission sleeve 62 to fit with the static sealing ring 67 for relative rotation and friction, thereby forming a dynamic seal to ensure the sealing effect between the drive shaft 5 and the ceramic housing, thereby preventing leakage. And a gap is set between the transmission sleeve 62 and the ceramic rear guard plate 32 to prevent the debris of the liquid medium from wearing the ceramic rear guard plate 32, thereby ensuring the service life.

[0039] A connecting column 41 is provided at the end of the impeller 4, and a connecting groove for inserting the drive shaft 5 is provided on the connecting column 41. A ring sleeve 68 is provided on the static ring seat 66 and is sleeved on the connecting column 41. A sealing ring is provided between the ring sleeve 68 and the connecting column 41 to prevent impurities in the medium from entering between the transmission sleeve 62 and the drive shaft 5, resulting in wear and leakage between the two.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A ceramic housing, characterized in that: It comprises a middle shell assembly (1), a front cover assembly (2) and a rear cover assembly (3) which are arranged on both ends of the middle shell, and a fixing member used for fixing the front cover assembly (2) and the rear cover assembly (3) on the middle shell assembly (1); The rear cover plate assembly (3) comprises a metal rear cover plate (31) and a ceramic rear guard plate (32) fixed on the metal rear cover plate (31); a guide surface (33) whose diameter gradually increases in a direction away from the front cover plate assembly (2) is provided on the outer wall of the ceramic rear guard plate (32); and a sealing surface (13) cooperating with the guide surface (33) is provided on the middle shell assembly (1).

2. A ceramic housing according to claim 1, characterized in that: The middle shell assembly (1) comprises a metal shell (11) and a ceramic liner (12) sintered and fixed on the metal shell (11).

3. The ceramic housing according to claim 1, characterized in that: The front cover plate assembly (2) comprises a metal front cover plate (21) and a ceramic front guard plate (22) sintered and fixed on the metal front cover plate (21), and a sealing member is provided between the ceramic front guard plate (22) and the ceramic inner container (12).

4. A ceramic pump, characterized in that: It comprises the ceramic shell according to any one of claims 1 to 3, an impeller (4) arranged in the ceramic shell, and a drive shaft (5) connected to the impeller (4), wherein a mechanical seal (6) is arranged between the drive shaft (5) and the shell.

5. A ceramic pump according to claim 4, characterized in that: The mechanical seal (6) comprises a shaft sleeve (61) sleeved on the drive shaft (5) and a transmission sleeve (62) sleeved on the shaft sleeve (61); a dynamic ring seat (63) is arranged on the transmission sleeve (62); a dynamic sealing ring (64) is arranged on the dynamic ring seat (63); a sealing housing (65) is sleeved on the transmission sleeve (62); a static ring seat (66) is arranged on the sealing housing (65); a static sealing ring (67) which is in contact with the dynamic sealing ring (64) is arranged on the static ring seat (66); and a labyrinth sealing ring is arranged between the sealing housing (65) and the transmission sleeve (62).

6. A ceramic pump according to claim 5, characterized in that: The end of the impeller (4) is provided with a connecting column (41), the connecting column (41) is provided with a connecting groove for inserting the drive shaft (5), and the stationary ring seat (66) is provided with a ring sleeve (68) sleeved on the connecting column (41).

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