Ultra-short distance tight coupling end suction pump

Abstract

The utility model relates to the technical field of mechanical engineering pumps, in particular to an ultra-short-distance tight coupling end suction pump which comprises a pump body, an impeller, a pump shaft and a mechanical seal, a connecting cover is arranged on one side of the pump body, a mechanical seal cavity is formed in the connecting cover, one end of the connecting cover is connected with the pump shaft through a bearing bush, and the other end of the connecting cover is connected with the pump shaft through a bearing. The connecting cover comprises a pump cover and a bearing body, the pump cover is arranged on one side of the pump body, one end of the pump cover is fixedly connected with the pump body, the bearing body is arranged at the other end of the pump cover, a mechanical seal cavity is formed in the end, close to the pump cover, of the bearing body, the mechanical seal is located in the mechanical seal cavity, and a water inlet channel and a water outlet channel are formed in the bearing body. One end of the pump cover close to the bearing body is provided with a mechanical seal cavity ', and the pump cover is connected with the pump shaft through a mechanical seal'. According to the utility model, the axial length of the pump shaft is short, the single-bearing structure is adopted, the use cost is low, and the mechanical seal cooling effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical engineering pumps, in particular to an ultra-short distance tightly coupled end-suction pump. Background Art

[0002] Common water pumps usually have a pump shaft, a pump body, a pump cover, a suspension and an impeller. The existing water pump has redundant axial arrangements and high operating costs. The applicant applied for an application number of 2023107803734 on June 29, 2023, and the application name is a high-pressure hot water pump with a cooling structure. The pump is provided with a pump body, an impeller, a pump cover, a pump shaft, a suspension, a mechanical seal and a cooling structure. The suspension, the pump cover and the pump body are arranged in sequence from back to front. The pump shaft passes through the suspension and the pump cover in sequence and extends into the impeller cavity of the pump body. The pump shaft is fixedly sleeved with the impeller in the impeller cavity. The cooling structure adopts a water-cooled shell. The hollow interior of the water-cooled shell is sleeved outside the pump cover. The water-cooling shell is limited by a limiting member or connected to the pump cover, a water-cooling cavity is formed between the inside of the water-cooling shell and the pump cover, and a water inlet and a water outlet connected to the water-cooling cavity are provided on the water-cooling shell; a suspension cavity is provided inside the suspension, and the machine seal is provided in the suspension cavity and sleeved on the pump shaft. The shortcomings of the above patent are: first, a pump cover and a suspension are provided in the above patent, and both ends of the suspension are fixed to the pump shaft through bearings, and the pump cover and the suspension are sleeved on the pump shaft, which extends the axial length of the pump shaft. During installation, the pump shaft is long and occupies a large installation space on site; second, the machine seal cavity lacks a cooling mechanism, the temperature in the machine seal cavity is still high, and the machine seal is easily damaged. Summary of the invention

[0003] The utility model aims to solve the deficiencies in the prior art and to provide an ultra-short distance tightly coupled end suction pump with a simple structure, short axial length of the pump shaft, small occupied space, single bearing structure, low use cost and good mechanical seal cooling effect.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] An ultra-short-distance tightly coupled end-suction pump comprises a pump body, an impeller, a pump shaft and a machine seal, wherein the pump shaft is fixedly connected to the impeller hub and is characterized in that: a connecting cover is provided on one side of the pump body, a machine seal cavity is provided in the connecting cover, a bearing is provided at one end of the connecting cover, and a bearing is provided at the other end, one end of the connecting cover is connected to the pump shaft via the bearing, and the other end is connected to the pump shaft via the bearing, the connecting cover is fixedly connected to the pump body, the bearing is sleeved on the pump shaft and connected with the pump shaft with a clearance fit, one end of the bearing abuts against the impeller hub, and the other end abuts against the connecting cover, the machine seal is located in the machine seal cavity, the machine seal is connected to the pump shaft to balance the radial force through the bearing and the bearing, and at the same time a connecting cover effectively reduces the axial length, realizes ultra-short-distance tightly coupling, saves costs, and reduces on-site installation space.

[0006] The connecting cover of the utility model comprises a pump cover and a bearing body, wherein the pump cover is provided on one side of the pump body, one end of the pump cover is fixedly connected to the pump body, and the other end is provided with a bearing body, the pump cover is connected to the pump shaft via a bearing shell, the bearing body is fixedly connected to the pump cover, an end of the bearing body close to the pump cover is provided with a machine seal cavity, the machine seal is located in the machine seal cavity, one end of the bearing body is connected to the pump shaft via the machine seal, and the other end is connected to the pump shaft via a bearing, so that the machine seal is arranged at one end of the bearing body, the bearing body space is effectively utilized, the length of the pump cover and the bearing body is shortened, and the axial length of the entire pump shaft is shortened.

[0007] The bearing body of the utility model is provided with a water inlet channel and a water outlet channel, so that cold water can be connected through the water inlet channel to cool the mechanical seal, and the cooling effect is good.

[0008] The pump cover of the utility model is provided with a machine seal cavity' at one end close to the bearing body, and a machine seal' is provided in the machine seal cavity'. The pump cover is connected to the pump shaft via the machine seal' to form a double-end machine seal through the machine seal' and the machine seal, which effectively isolates the medium end from leaking toward the bearing and prolongs the service life of the bearing.

[0009] The utility model has the advantages of simple structure, short axial length of the pump shaft, small occupied space, single bearing structure, low use cost, good mechanical seal cooling effect, etc. due to the adoption of the above structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model.

[0011] Reference numerals: pump body 1, impeller 2, pump shaft 3, mechanical seal 4, connecting cover 5, bearing bush 6, bearing 7, pump cover 8, bearing body 9, water inlet channel 10, water outlet channel 11, mechanical seal 12. DETAILED DESCRIPTION

[0012] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0013] An ultra-short-distance tightly coupled end-suction pump comprises a pump body 1, an impeller 2, a pump shaft 3, and a machine seal 4, wherein the pump shaft 3 is fixedly connected to the hub of the impeller 2, and is characterized in that: a connecting cover 5 is provided on one side of the pump body 1, a machine seal cavity is provided in the connecting cover 5, a bearing bush 6 is provided at one end of the connecting cover 5, and a bearing 7 is provided at the other end, one end of the connecting cover 5 is connected to the pump shaft 3 via the bearing bush 6, and the other end is connected to the pump shaft 3 via the bearing 7, the connecting cover 5 is fixedly connected to the pump body 1, the bearing bush 6 is sleeved on the pump shaft 3 and connected with the pump shaft 3 with a clearance fit, one end of the bearing bush 6 abuts against the hub of the impeller 2, and the other end abuts against the connecting cover 5, the machine seal 4 is located in the machine seal cavity, the machine seal 4 is connected to the pump shaft 3 to balance the radial force through the bearing bush and the bearing, and at the same time, a connecting cover effectively reduces the axial length, realizes ultra-short-distance tightly coupling, saves costs, and reduces on-site installation space.

[0014] The connecting cover 5 of the utility model comprises a pump cover 8 and a bearing body 9. A pump cover 8 is provided on one side of the pump body 1. One end of the pump cover 8 is fixedly connected to the pump body 1, and a bearing body 9 is provided on the other end. The pump cover 8 is connected to the pump shaft 3 via a bearing bush 6. The bearing body 9 is fixedly connected to the pump cover 8. An engine seal cavity is provided at one end of the bearing body 9 close to the pump cover 8. The engine seal 4 is located in the engine seal cavity. One end of the bearing body 9 is connected to the pump shaft 3 via the engine seal 4, and the other end is connected to the pump shaft 3 via a bearing 7, so that the engine seal is set at one end of the bearing body, the bearing body space is effectively utilized, the length of the pump cover and the bearing body is shortened, and the axial length of the entire pump shaft is shortened.

[0015] The bearing body 9 of the utility model is provided with a water inlet channel 10 and a water outlet channel 11, so that cold water can be connected through the water inlet channel to cool the mechanical seal, and the cooling effect is good.

[0016] The pump cover 8 of the utility model is provided with a mechanical seal cavity ' at one end close to the bearing body 9, and a mechanical seal '12 is provided in the mechanical seal cavity '. The pump cover 8 is connected to the pump shaft 3 via the mechanical seal '12 to form a double-end mechanical seal through the mechanical seal ' and the mechanical seal, which effectively isolates the medium from leaking toward the bearing at the medium end and prolongs the service life of the bearing.

[0017] As attached Figure 1 In the utility model, the pump cover 8 and the bearing body 9 can be a component, that is, a connecting cover 5. One end of the connecting cover 5 is connected to the pump shaft 3 through a bearing bush 6, and the other end is fixedly connected to the pump shaft 3 through a bearing 7. The axial length of a connecting cover 5 is relatively short, which shortens the axial length of the pump shaft, realizes ultra-short-distance tight coupling, and reduces the on-site installation space. In addition, only one bearing is used in the utility model, and the use cost is low. The bearing bush 6 can act as a sliding bearing, effectively alleviating the radial force of the non-driving end. The mechanical seal 4 is arranged in the bearing body 9, making full use of the space of the bearing body 9. The bearing body 9 is provided with a water inlet channel 10 and a water outlet channel 11. The water inlet channel 10 is connected to a water source, such as a faucet, through a water pipe, and the water outlet channel 11 is connected to a pool or a water tank through a water pipe. , convenient for drainage, cold water enters the machine seal cavity through the water inlet channel 10, cools the machine seal 4, and then flows out from the water outlet channel 11. In the utility model, the machine seal 4 is far away from the impeller 2, and with cold water cooling, the cooling effect is good, which extends the service life of the machine seal 4 and the bearing body 9. In addition, the utility model also arranges a machine seal '12 on one side of the machine seal 4, and the machine seal 4 and the machine seal '12 form a double-end machine seal, which effectively isolates the medium leakage from the medium end to the bearing, thereby extending the service life of the bearing. In addition, in the utility model, the pump cover 8 can be detachably connected to the pump body 1 through bolts and nuts, and the pump cover 8 and the bearing body 9 can be detachably connected through bolts and nuts, which is convenient for installation and replacement, and the pump cover 8 and the bearing body 9 are detachable, and the machine seal 4 and the machine seal '12 are very convenient for disassembly and maintenance.

[0018] The utility model has the advantages of simple structure, short axial length of the pump shaft, small occupied space, single bearing structure, low use cost, good mechanical seal cooling effect, etc. due to the adoption of the above structure.

Claims

1. An ultra-short distance tightly coupled end-suction pump, comprising a pump body (1), an impeller (2), a pump shaft (3), and a mechanical seal (4), characterized in that: A connecting cover (5) is provided on one side of the pump body (1), a machine seal cavity is provided in the connecting cover (5), a bearing bush (6) is provided at one end of the connecting cover (5), and a bearing (7) is provided at the other end, one end of the connecting cover (5) is connected to the pump shaft (3) via the bearing bush (6), and the other end is connected to the pump shaft (3) via the bearing (7), the connecting cover (5) is fixedly connected to the pump body (1), one end of the bearing bush (6) abuts against the impeller (2), and the other end abuts against the connecting cover (5), the machine seal (4) is located in the machine seal cavity, and the machine seal (4) is connected to the pump shaft (3).

2. The ultra-short distance tightly coupled end suction pump according to claim 1, characterized in that: The connecting cover (5) comprises a pump cover (8) and a bearing body (9); the pump cover (8) is provided on one side of the pump body (1); one end of the pump cover (8) is fixedly connected to the pump body (1); and the other end is provided with a bearing body (9); the pump cover (8) is connected to the pump shaft (3) via a bearing bush (6); the bearing body (9) is fixedly connected to the pump cover (8); a machine seal cavity is provided at one end of the bearing body (9) close to the pump cover (8); one end of the bearing body (9) is connected to the pump shaft (3) via a machine seal (4); and the other end is connected to the pump shaft (3) via a bearing (7).

3. The ultra-short distance tightly coupled end suction pump according to claim 2, characterized in that: The bearing body (9) is provided with a water inlet channel (10) and a water outlet channel (11).

4. An ultra-short distance tightly coupled end suction pump according to claim 2 or 3, characterized in that: A mechanical seal cavity ' is provided at one end of the pump cover (8) close to the bearing body (9), a mechanical seal ' (12) is provided in the mechanical seal cavity ', and the pump cover (8) is connected to the pump shaft (3) via the mechanical seal ' (12).

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