Pump with shaft transmission device having drainage function

Abstract

The utility model relates to the technical field of pumps, in particular to a pump with a shaft transmission device having a drainage function. Comprising a driving device; the driving device is connected with an output shaft, the other end of the output shaft is connected with a connecting shaft, the connecting shaft is located in the shaft transmission mechanism, and the other end of the connecting shaft is connected with a rotating mechanism. The shaft transmission mechanism comprises a shell, a standby cavity is formed in the shell, one end of the standby cavity communicates with the connecting shaft, and the other end of the standby cavity communicates with the shell; compared with the prior art, one end of the standby cavity is communicated with the connecting shaft, and the other end of the standby cavity is provided with the water drainage pipe, so that the shaft transmission mechanism has a water drainage function, and when liquid enters the standby cavity through the oil seal and the mechanical seal in the front, the liquid flows into the standby cavity and then is drained through the water drainage pipe. Therefore, the liquid is effectively prevented from flowing into the next layer of oil seal or mechanical seal through the standby cavity, and excellent sealing and waterproof effects are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pumps, in particular to a pump with a shaft drive device having a water drainage function. Background Art

[0002] A pump is a machine that transports fluids or increases the pressure of fluids. It transfers the mechanical energy of the prime mover or other external energy to the liquid, increasing the energy of the liquid. Pumps are mainly used to transport liquids such as water, oil, acid and alkali solutions, emulsions, suspension liquids, and liquid metals, and can also transport liquid-gas mixtures and liquids containing suspended solids. Pumps can usually be classified into three categories according to the working principle: positive displacement pumps, dynamic pumps, and other types of pumps. In addition to classification by working principle, they can also be classified and named by other methods. For example, according to the driving method, they can be divided into electric pumps and water turbine pumps, etc.; according to the structure, they can be divided into single-stage pumps and multi-stage pumps; according to the use, they can be divided into boiler feed pumps and metering pumps, etc.; according to the nature of the transported liquid, they can be divided into water pumps, oil pumps, and mud pumps, etc. According to the presence or absence of a shaft structure, they can be divided into linear pumps and traditional pumps. A water pump can only transport logistics with fluid as the medium and cannot transport solids.

[0003] Currently, the pump structure generally includes a motor, an output shaft, a shaft drive mechanism, and an impeller. The motor is connected to the output shaft, and the other end of the output shaft is inserted into the shaft drive mechanism and connected to the impeller. However, in the prior art, when the pump is working, the liquid will flow along the output shaft to the motor (through the shaft drive mechanism), resulting in the motor getting water and being prone to failure problems, or the liquid splashing out of the shaft drive mechanism. The main problem in this situation is the poor sealing performance of the shaft drive mechanism, which greatly reduces the use effect and quality of the pump; based on this, we propose a pump with a shaft drive device having a water drainage function. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a pump with a shaft drive device having a water drainage function. After improvement, this pump can effectively solve the problems raised in the above background art.

[0005] The technical solution of the utility model is as follows:

[0006] A pump with a shaft drive device having a water drainage function includes a driving device, an output shaft, a connecting shaft, a shaft drive mechanism, and a rotating mechanism;

[0007] The driving device is connected to an output shaft, the other end of the output shaft is connected to a connecting shaft, the connecting shaft is located inside the shaft drive mechanism, and the other end of the connecting shaft is connected to a rotating mechanism;

[0008] The shaft drive mechanism includes a housing, a spare cavity is arranged inside the housing, one end of the spare cavity is communicated with the connecting shaft, and the other end of the spare cavity is communicated with the housing.

[0009] Furthermore, several layers of oil chambers, mechanical oil seals, and skeleton oil seals are also arranged inside the housing. The several layers of oil chambers are arranged alternately or sequentially with the mechanical oil seals, the standby chamber, and the skeleton oil seals. The connecting shaft is respectively communicated with the several layers of oil chambers, the standby chamber, the mechanical oil seal, and the skeleton oil seal.

[0010] Furthermore, the housing is provided with a notch at the position of the standby chamber, and a drain pipe is installed on the notch.

[0011] Furthermore, an alloy sleeve is installed at one end of the connecting shaft close to the rotating mechanism, and a bearing is installed at the other end of the connecting shaft far from the rotating mechanism. Both the alloy sleeve and the bearing are located inside the housing.

[0012] Furthermore, the mechanical oil seal, the skeleton oil seal, the standby chamber, and the several layers of oil chambers are arranged between the alloy sleeve and the bearing.

[0013] Furthermore, the mechanical oil seal is fixedly connected with the connecting shaft, and the skeleton oil seal, the alloy sleeve, and the bearing are respectively in transmission connection with the connecting shaft.

[0014] Furthermore, the driving device adopts a motor, the rotating mechanism adopts an impeller, and the impeller is detachably connected with the connecting shaft.

[0015] Furthermore, the pump with the function of regulating the oil temperature of the oil chamber of the transmission shaft further includes a pump housing. The open end of the housing is detachably connected with the pump housing. The impeller is located inside the pump housing. One end of the pump housing is provided with a water inlet, and the other end is provided with a water outlet.

[0016] Furthermore, the output shaft can be connected with the connecting shaft through a coupling or the output shaft and the connecting shaft are of an integrally formed structure.

[0017] The beneficial effects of the present utility model are as follows:

[0018] Compared with the prior art, the present utility model has a standby chamber. One end of the standby chamber is communicated with the connecting shaft, and the other end is installed with a drain pipe, so that the shaft transmission mechanism has the function of draining water. When the liquid enters the standby chamber after passing through the previous oil seal and mechanical seal, at this time, the liquid will flow into the interior of the standby chamber and then be discharged through the drain pipe, thereby effectively preventing the liquid from flowing into the next layer of oil seal or mechanical seal through the standby chamber, achieving an excellent sealing and waterproof effect; at the same time, several layers of oil chambers, mechanical oil seals, skeleton oil seals, alloy sleeves, and bearings are arranged in the shaft transmission mechanism. The several layers of oil chambers, mechanical oil seals, skeleton oil seals, and alloy sleeves realize the function of multi-point sealing, and the sealing effect is excellent, which can effectively prevent the liquid from flowing through the connecting shaft into the motor or splashing out of the connecting shaft. Description of the Drawings

[0019] Figure 1This is a schematic structural diagram (cross-sectional view) of the present utility model.

[0020] In the figure, 1 is the driving device; 2 is the output shaft; 3 is the connecting shaft; 4 is the shaft transmission mechanism; 5 is the rotating mechanism; 6 is the housing; 7 is the spare cavity; 8 is the oil cavity; 9 is the mechanical oil seal; 10 is the skeleton oil seal; 11 is the drain pipe; 12 is the alloy sleeve; 13 is the bearing; 14 is the pump casing; 15 is the water inlet; 16 is the water outlet. Specific embodiments

[0021] The following further describes the specific embodiments of the present utility model with reference to the accompanying drawings:

[0022] As Figure 1 shown,

[0023] A pump with a shaft transmission device having a water drainage function includes a driving device 1, an output shaft 2, a connecting shaft 3, a shaft transmission mechanism 4 and a rotating mechanism 5; the driving device 1 is connected to the output shaft 2, the other end of the output shaft 2 is connected to the connecting shaft 3, the connecting shaft 3 is located inside the shaft transmission mechanism 4, and the other end of the connecting shaft 3 is connected to the rotating mechanism 5; the shaft transmission mechanism 4 includes a housing 6, a spare cavity 7 is provided inside the housing 6, one end of the spare cavity 7 is communicated with the connecting shaft 3, and the other end of the spare cavity 7 is communicated with the housing 6; in this embodiment, the shaft transmission mechanism 4 has the function of draining water. When the liquid passes through the front oil seal and mechanical seal and enters the spare cavity 7, at this time, the liquid will flow into the spare cavity 7 and then be discharged through the drain pipe 11, thereby effectively preventing the liquid from flowing from the spare cavity 7 to the next layer of oil seal or mechanical seal, achieving an excellent sealing and waterproof effect;

[0024] In addition, the spare cavity 7 can also be used as the oil cavity 8, and butter can be injected, which can lubricate the mechanical oil seal 9 and the skeleton oil seal 10 and has a spare supplementary function.

[0025] As a preferred embodiment; several layers of oil cavities 8 (the inside of the oil cavity 8 is mainly filled with butter to form a butter layer for lubricating the mechanical oil seal 9 and the skeleton oil seal 10 and having a sealing function of blocking liquid), a mechanical oil seal 9 and a skeleton oil seal 10 are also provided inside the housing 6. The several layers of oil cavities 8 are arranged alternately or sequentially with the mechanical oil seal 9, the spare cavity 7 and the skeleton oil seal 10, and the connecting shaft 3 is respectively communicated with the several layers of oil cavities 8, the spare cavity 7, the mechanical oil seal 9 and the skeleton oil seal 10; it can be understood that the several layers of oil cavities 8, the mechanical oil seal 9 and the skeleton oil seal 10 realize the function of multi-point sealing, and the sealing effect is excellent, which can effectively prevent the liquid from flowing through the connecting shaft 3 into the motor or splashing out of the connecting shaft 3 (cooperating with the water drainage function of the spare cavity 7, so that the liquid will not flow out of the shaft transmission mechanism 4 at all).

[0026] As another preferred embodiment; the connecting shaft 3 is connected to the alloy sleeve 12, the oil chamber 8, the mechanical oil seal 9, the spare chamber 7, the skeleton oil seal 10, the oil chamber 8 and the bearing 13 in sequence; the preferred hierarchical structure of the utility model is the alloy sleeve 12, the oil chamber 8, the mechanical oil seal 9, the spare chamber 7, the skeleton oil seal 10, the oil chamber 8 and the bearing 13, the purpose of which is to achieve the best waterproof effect under a limited sealing layer structure and to reduce costs at the same time.

[0027] As a preferred embodiment; the housing 6 is provided with a notch at the spare chamber 7, and a drain pipe 11 is installed on the notch; during the drainage process, the liquid flowing on the connecting shaft 3 will enter the spare chamber 7 and then be discharged through the drain pipe 11. The drain pipe 11 can be connected to the liquid storage tank through a pipeline so that the liquid can flow back again.

[0028] As a preferred embodiment; an alloy sleeve 12 is installed at one end of the connecting shaft 3 close to the rotating mechanism 5, and a bearing 13 is installed at one end of the connecting shaft 3 away from the rotating mechanism 5, and the alloy sleeve 12 and the bearing 13 are both located inside the outer shell 6; by providing the alloy sleeve 12 and the bearing 13, it not only has the function of supporting the connecting shaft 3 (cooperating with the mechanical oil seal 9 and the skeleton oil seal 10 to form multi-point support), but also has a sealing effect, the gap between the alloy sleeve 12 and the connecting shaft 3 and the gap between the bearing 13 and the connecting shaft 3 are very small (within 50 microns), which can effectively perform sealing.

[0029] As a preferred embodiment; the mechanical oil seal 9, skeleton oil seal 10, spare cavity 7 and several layers of the oil cavity 8 are arranged between the alloy sleeve 12 and the bearing 13; it can be understood that the alloy sleeve 12 is the first to contact the water instead of the mechanical oil seal 9 or the skeleton oil seal 10. The structure of the traditional pump is that the mechanical oil seal 9 or the skeleton oil seal 10 is arranged close to one end of the impeller. The water and dirt in the dirty water can easily enter the mechanical oil seal 9 or the skeleton oil seal 10, which can easily cause damage to the mechanical oil seal 9 or the skeleton oil seal 10. The present application uses the alloy sleeve 12 for the first sealing, which can block more than 95% of the water and dirt in the dirty water, thereby effectively protecting the mechanical oil seal 9 or the skeleton oil seal 10; moreover, the alloy sleeve 12 is made of alloy, which can extend its service life.

[0030] As a preferred embodiment, the mechanical oil seal 9 is fixedly connected to the connecting shaft 3, and the skeleton oil seal 10, the alloy sleeve 12 and the bearing 13 are respectively connected to the connecting shaft 3 in a transmission manner. It can be understood that the alloy sleeve 12 and the bearing 13 are first fixedly connected to the housing 6, and then connected to the connecting shaft 3 in a transmission manner, while the mechanical oil seal 9 rotates together with the connecting shaft 3.

[0031] As a preferred embodiment, the driving device 1 is a motor, the rotating mechanism 5 is an impeller, and the impeller is detachably connected to the connecting shaft 3. It can be understood that during disassembly, the motor and the output shaft 2 can be first removed from the connecting shaft 3, and then the pump casing 14 is opened, and the screws on the impeller and the connecting shaft 3 are removed, so that the connecting shaft 3 can be removed, which is convenient for future maintenance.

[0032] As a preferred embodiment, the pump with an oil cavity temperature regulating function for the transmission shaft further includes a pump casing 14. The open end of the outer casing 6 is detachably connected to the pump casing 14. The impeller is located inside the pump casing 14. One end of the pump casing 14 is provided with a water inlet 15, and the other end is provided with a water outlet 16. The pump casing 14 and the outer casing 6 can be installed by bolts, which is convenient for disassembling the pump casing 14. Secondly, driven by the impeller, water can enter through the water inlet 15 and be discharged through the water outlet 16.

[0033] As a preferred embodiment, the output shaft 2 can be connected to the connecting shaft 3 through a coupling or the output shaft 2 and the connecting shaft 3 are of an integrally formed structure.

[0034] It is worth mentioning that the outer casing 6 can be divided into multiple connecting casings. The alloy sleeve 12, the oil cavity 8, the mechanical oil seal 9, the spare cavity 7, the skeleton oil seal 10 and the bearing 13 can all be separately provided with connecting casings. Each connecting casing is provided with a suitable connecting groove and step, so that each layer of structure can be detachably connected in a laminated manner, so that each part of the shaft transmission mechanism 4 can be disassembled, which is more convenient for future maintenance work. At the same time, a sealing ring can be installed at the connection between adjacent connecting casings to enhance its sealing effect.

[0035] In this application, during operation, the motor is started to drive the output shaft 2 and the connecting shaft 3 to rotate, and then drive the impeller to rotate to realize the pumping work of the pump; during operation, water will flow along the connecting shaft 3. Since the shaft transmission mechanism 4 is provided with a multi-layer sealing structure, the alloy sleeve 12 structure at the first place can block 95% of the dirty water, and the multi-layer oil seals and multiple mechanical seals behind make it extremely difficult for water to penetrate; if there is penetration in the previous layers, the liquid can also be discharged in the spare cavity 7.

[0036] The above embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention should fall within the protection scope determined by the claims of the present invention.

Claims

1. A pump with a shaft transmission device having a water discharge function, comprising a driving device, an output shaft, a connecting shaft, a shaft transmission mechanism and a rotating mechanism; the driving device is connected to the output shaft, the other end of the output shaft is connected to the connecting shaft, the connecting shaft is located inside the shaft transmission mechanism, and the other end of the connecting shaft is connected to the rotating mechanism; characterized in that: The shaft transmission mechanism includes a shell, a spare cavity is arranged inside the shell, one end of the spare cavity is connected to the connecting shaft, and the other end of the spare cavity is connected to the shell; the shell is provided with a notch at the spare cavity, and a drain pipe is installed on the notch.

2. A pump with a shaft transmission device having a water discharge function according to claim 1, characterized in that: The interior of the shell is also provided with several layers of oil chambers, mechanical oil seals and skeleton oil seals. The several layers of oil chambers, mechanical oil seals, spare chambers and skeleton oil seals are arranged alternately or sequentially. The connecting shaft is connected to the several layers of oil chambers, spare chambers, mechanical oil seals and skeleton oil seals respectively.

3. A pump with a shaft transmission device having a water discharge function according to claim 2, characterized in that: An alloy sleeve is installed at one end of the connecting shaft close to the rotating mechanism, and a bearing is installed at one end of the connecting shaft away from the rotating mechanism. Both the alloy sleeve and the bearing are located inside the housing.

4. A pump with a shaft transmission device having a water discharge function according to claim 3, characterized in that: The mechanical oil seal, the skeleton oil seal, the spare cavity and the plurality of layers of the oil cavity are arranged between the alloy sleeve and the bearing.

5. A pump with a shaft transmission device having a water discharge function according to claim 4, characterized in that: The mechanical oil seal is fixedly connected to the connecting shaft, and the skeleton oil seal, the alloy sleeve and the bearing are respectively drivingly connected to the connecting shaft.

6. A pump with a shaft transmission device and a water discharge function according to claim 5, characterized in that: The driving device adopts a motor, the rotating mechanism adopts an impeller, and the impeller is detachably connected to the connecting shaft.

7. A pump with a shaft transmission device and a water discharge function according to claim 6, characterized in that: The pump with the shaft transmission device having the water discharge function also includes a pump casing, the open end of the casing is detachably connected to the pump casing, the impeller is located inside the pump casing, one end of the pump casing is provided with a water inlet, and the other end is provided with a water outlet.

8. A pump with a shaft transmission device and a water discharge function according to claim 7, characterized in that: The output shaft can be connected to the connecting shaft via a coupling, or the output shaft and the connecting shaft can be an integrally formed structure.

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