Stress structure of transmission device for pump

Abstract

The utility model relates to the technical field of pumps, in particular to a stress structure of a transmission device for a pump. 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 two ends of the connecting shaft are connected with an alloy sleeve and a bearing respectively, and the end, close to the alloy sleeve, of the connecting shaft is connected with a rotating mechanism. A shaft hole is formed in the end, close to the output shaft, of the connecting shaft, a groove hole is formed in the inner wall of the shaft hole, and a protruding edge matched with the groove hole is arranged at the end, close to the connecting shaft, of the output shaft. When the motor rotates, only the connecting shaft is driven to slightly move together, the output shaft cannot move, the axial force of the output shaft is only transferred to the shaft hole and the slotted hole and cannot be transferred to the motor, the load and stress of the motor are reduced, energy consumption can be reduced, and the service life of the motor can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of pumps, in particular to a stress structure of a transmission device for a pump. Background Technique

[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-base solutions, emulsions, suspension liquids, and liquid metals, and can also transport liquid-gas mixtures and liquids containing suspended solids. Pumps can generally 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 slurry 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] At present, the pump structure generally includes a motor, an output shaft, a shaft transmission mechanism, and an impeller. In the prior art, the motor is connected to the output shaft, and the other end of the output shaft is directly connected to the shaft transmission mechanism. However, when the pump is working, the impeller will have a slight displacement in the water absorption state, causing the output shaft to move outwards, pulling the motor, causing the motor to generate load and stress, which will increase the power of the motor and thus increase energy consumption. Moreover, in the long run, the service life of the motor will be reduced, thereby reducing the use quality of the pump. For this reason, we propose a stress structure of a transmission device for a pump. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a stress structure of a transmission device for a pump. After improvement, the pump can effectively solve the problems raised in the above background technique.

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

[0006] A stress structure of a transmission device for a pump, including a driving device, an output shaft, a connecting shaft, a shaft transmission mechanism, and a rotating mechanism;

[0007] The driving device is connected with an output shaft, and the other end of the output shaft is connected with a connecting shaft. The connecting shaft is located inside the shaft transmission mechanism. Both ends of the connecting shaft are respectively connected with an alloy sleeve and a bearing for supporting the connecting shaft. One end of the connecting shaft close to the alloy sleeve is connected with a rotating mechanism; the alloy sleeve abuts against and limits the rotating mechanism; one end of the connecting shaft close to the output shaft is provided with a shaft hole, and a slot hole is arranged on the inner wall of the shaft hole. One end of the output shaft close to the connecting shaft is provided with a convex rib adapted to the slot hole. The output shaft is inserted into the shaft hole of the connecting shaft, and the convex rib abuts inside the slot hole.

[0008] Further, the shaft transmission mechanism includes a housing. Inside the housing, there are several layers of oil cavities, mechanical oil seals and skeleton oil seals. The several layers of oil cavities are arranged alternately or in sequence with the mechanical oil seals and the skeleton oil seals. The connecting shaft communicates with the several layers of oil cavities, mechanical oil seals and skeleton oil seals respectively. Both the alloy sleeve and the bearing are located inside the housing.

[0009] Further, the mechanical oil seal, the skeleton oil seal and the several layers of oil cavities are arranged between the alloy sleeve and the bearing.

[0010] Further, 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.

[0011] Further, the driving device is a motor, the rotating mechanism is an impeller, and the impeller is detachably connected with the connecting shaft.

[0012] Further, the force-bearing structure further includes a pump casing. The open end of the housing is detachably connected with 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.

[0013] Further, 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.

[0014] The beneficial effects of the present utility model are as follows:

[0015] Compared with the prior art, the present utility model is provided with an output shaft and a connecting shaft. The connecting shaft is provided with a shaft hole and a slot hole, and the output shaft is provided with a convex rib. The output shaft and the connecting shaft are inserted. When the impeller works and absorbs water and moves slightly, it will only drive the connecting shaft to move slightly together, and will not cause the output shaft to move. Its axial force will only be transferred to the shaft hole and the slot hole, rather than to the motor, reducing the load and force on the motor, and thus being able to reduce energy consumption and improve the service life of the motor. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram (sectional view) of the present utility model;

[0017] Figure 2 This is a schematic structural view (cross-sectional view) of the shaft drive mechanism of the present utility model;

[0018] Figure 3 This is a schematic structural view of the shaft drive mechanism of the present utility model connecting to the pump housing.

[0019] In the figure, 1 is the driving device; 2 is the output shaft; 3 is the connecting shaft; 4 is the shaft drive mechanism; 5 is the rotating mechanism; 6 is the alloy sleeve; 7 is the bearing; 8 is the shaft hole; 9 is the slot hole; 10 is the convex rib; 11 is the housing; 12 is the oil chamber; 13 is the mechanical oil seal; 14 is the skeleton oil seal; 15 is the pump housing; 16 is the water inlet; 17 is the water outlet. Specific embodiments

[0020] The following further describes the specific embodiments of the present utility model with reference to the accompanying drawings:

[0021] As Figures 1-3 shown,

[0022] A force-bearing structure of a transmission device for a pump, comprising a driving device 1, an output shaft 2, a connecting shaft 3, a shaft drive 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 drive mechanism 4, both ends of the connecting shaft 3 are respectively connected to an alloy sleeve 6 and a bearing 7 for supporting the connecting shaft 3, and one end of the connecting shaft 3 close to the alloy sleeve 6 is connected to the rotating mechanism 5; the alloy sleeve 6 abuts against and limits the rotating mechanism 5; a shaft hole 8 is provided at one end of the connecting shaft 3 close to the output shaft 2, a slot hole 9 is provided on the inner wall of the shaft hole 8, and a convex rib 10 adapted to the slot hole 9 is provided at one end of the output shaft 2 close to the connecting shaft 3, the output shaft 2 is inserted into the shaft hole 8 of the connecting shaft 3, and the convex rib 10 abuts against the inside of the slot hole 9 in the horizontal direction. In other words, the convex rib 10 and the slot hole 9 can move in the vertical direction; in this embodiment, when the rotating mechanism 5 works and absorbs water and undergoes a slight displacement, it will only drive the connecting shaft 3 to undergo a slight displacement together (the connecting shaft 3 is limited by the rotating mechanism 5 and the alloy sleeve 6 and can only undergo a slight displacement), and will not cause the output shaft 2 to move, so that the axial force will only be transferred to the shaft hole 8 and the slot hole 9, rather than to the driving device 1, thereby reducing the load and force on the driving device 1.

[0023] As a preferred embodiment, the shaft drive mechanism 4 includes a housing 11, and several layers of oil chambers 12 are arranged inside the housing 11 (the inside of the oil chamber 12 is mainly filled with grease to form a grease layer for lubricating the mechanical oil seal 13 and the skeleton oil seal 14, and having a sealing effect of blocking liquid), a mechanical oil seal 13 and a skeleton oil seal 14. The several layers of oil chambers 12 are arranged alternately or sequentially with the mechanical oil seal 13 and the skeleton oil seal 14. The connecting shaft 3 communicates with several layers of oil chambers 12, the mechanical oil seal 13 and the skeleton oil seal 14 respectively. The alloy sleeve 6 and the bearing 7 are both located inside the housing 11. It can be understood that the several layers of oil chambers 12, the mechanical oil seal 13 and the skeleton oil seal 14 can realize multi-point support of the connecting shaft 3, so that the connecting shaft 3 will not move and is more stable during operation. Moreover, the several layers of oil chambers 12, the mechanical oil seal 13, the skeleton oil seal 14 and the alloy sleeve 6 realize the function of multi-point sealing, and the sealing effect is excellent, which can effectively prevent liquid from flowing to the motor through the connecting shaft 3 or splashing out of the connecting shaft 3.

[0024] It is worth mentioning that the mechanical oil seal 13 and the skeleton oil seal 14 can also be set to several. According to actual application requirements, multiple mechanical oil seals 13 and skeleton oil seals 14 can be set, and they are arranged alternately or sequentially with several layers of oil chambers 12.

[0025] More specifically, the connecting shaft 3 is sequentially connected to the alloy sleeve 6, the oil chamber 12, the mechanical oil seal 13, the oil chamber 12, the skeleton oil seal 14, the oil chamber 12 and the bearing 7. However, due to the fact that the oil chamber 12 is arranged in several layers and the mechanical oil seal 13 and the skeleton oil seal 14 can be multiple, the oil chambers 12, the mechanical oil seal 13 and the skeleton oil seal 14 inside the shaft drive mechanism 4 can be increased or decreased according to actual situations, and their positions can be adjusted.

[0026] As a preferred embodiment, the mechanical oil seal 13, the skeleton oil seal 14 and several layers of the oil chambers 12 are arranged between the alloy sleeve 6 and the bearing 7. It can be understood that the purpose of this design is that the alloy sleeve 6 first contacts water instead of the mechanical oil seal 13 or the skeleton oil seal 14. In the structure of a traditional pump, the mechanical oil seal 13 or the skeleton oil seal 14 is arranged near the impeller end, and water and dirt in the dirty water easily enter the inside of the mechanical oil seal 13 or the skeleton oil seal 14, which easily causes damage to the mechanical oil seal 13 or the skeleton oil seal 14. However, in this application, the alloy sleeve 6 is used for the first-stage seal, which can block more than 95% of the water and dirt in the dirty water, thereby effectively protecting the mechanical oil seal 13 or the skeleton oil seal 14. Moreover, the material of the alloy sleeve 6 is alloy, which can extend its service life.

[0027] As a preferred embodiment, the mechanical oil seal 13 is fixedly connected to the connecting shaft 3, and the skeleton oil seal 14, the alloy sleeve 6 and the bearing 7 are respectively in transmission connection with the connecting shaft 3. It can be understood that the alloy sleeve 6 and the bearing 7 are first fixedly connected to the outer shell 11 and then in transmission connection with the connecting shaft 3, while the mechanical oil seal 13 rotates together with the connecting shaft 3. The gaps between the alloy sleeve 6 and the connecting shaft 3 and between the bearing 7 and the connecting shaft 3 are very small (within 50 microns), which can effectively seal.

[0028] As another preferred embodiment, the main function of the bearing 7 is to support and drive the connecting shaft 3. Therefore, the bearing 7 can be disassembled, and another alloy sleeve 6 can be installed below the shaft hole 8 of the connecting shaft 3. In this way, not only the supporting effect can be strengthened, but also the cost can be reduced, because the diameter at the shaft hole 8 of the connecting shaft 3 will be larger than that of other parts, and using the alloy sleeve 6 can save materials.

[0029] As a preferred embodiment, the driving device 1 uses a motor, the rotating mechanism 5 uses an impeller, and the impeller is detachably connected to the connecting shaft 3. It can be understood that when disassembling, the motor and the output shaft 2 can be first removed from the connecting shaft 3, and then the pump casing 15 is opened, and the screws on the impeller and the connecting shaft 3 are removed, and then the connecting shaft 3 can be removed, which is convenient for future maintenance.

[0030] As a preferred embodiment, the force-bearing structure of the pump transmission device further includes a pump casing 15. The open end of the outer shell 11 is detachably connected to the pump casing 15. The impeller is located inside the pump casing 15. One end of the pump casing 15 is provided with a water inlet 16, and the other end is provided with a water outlet 17. The water inlet 16 and the water outlet 17 are communicated. The pump casing 15 and the outer shell 11 can be installed by bolts, which is convenient for disassembling the pump casing 15. Secondly, driven by the impeller, water can enter through the water inlet 16 and be discharged through the water outlet 17.

[0031] 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 integrally formed. It can be understood that in addition to the way of inserting the output shaft 2 and the connecting shaft 3, the above two ways can also be adopted in this application.

[0032] As another preferred embodiment, the outer shell 11 can be divided into multiple connecting shells. The alloy sleeve 6, the oil chamber 12, the mechanical oil seal 13, the oil chamber 12, the skeleton oil seal 14, the oil chamber 12 and the bearing 7 can all be separately provided with connecting shells. Each connecting shell is provided with a matching connecting groove and a step, so that each layer structure can be detachably connected in a laminated manner, and thus each part of the shaft transmission mechanism 4 can be made detachable, which is more convenient for future maintenance work. At the same time, a sealing ring can be installed at the connection between adjacent connecting shells to enhance its sealing effect.

[0033] In this application, during operation, the motor is started, driving the output shaft 2 and the connecting shaft 3 to rotate, and then driving the impeller to rotate, realizing 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 6 structure at the first place can block 95% of the dirty water, and the subsequent multi-layer oil seals and multiple mechanical seals make it extremely difficult for water to penetrate, thereby effectively protecting the motor and preventing water leakage and splashing. In addition, the multi-functional pump of this application can be used in various different environments such as in water or not in water, and the use effect is good.

[0034] It should be pointed out that the main problems in the prior art are as follows: when the pump is working, the impeller will have a slight displacement in the water absorption state, causing the output shaft to move outwards, pulling the motor, causing the motor to generate load and stress, and then increasing the power of the motor, thereby increasing energy consumption. Moreover, if this continues for a long time, the service life of the motor will be reduced;

[0035] Therefore, after the improvement of this application, by providing the output shaft 2 and the connecting shaft 3, the output shaft 2 and the connecting shaft 3 are inserted. When the impeller works and has a slight displacement during water absorption, only the connecting shaft 3 will be driven to move slightly together, and the output shaft 2 will not move, so that the axial force will only be transferred to the shaft hole 8 and the slot hole 9, rather than to the motor, reducing the load and stress on the motor, and thus being able to reduce energy consumption and improve the service life of the motor.

[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 shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A force bearing structure of a pump transmission device, comprising a driving device, an output shaft, a connecting shaft, a shaft transmission mechanism and a rotating mechanism; characterized in that: The driving device is connected to an output shaft, and the other end of the output shaft is connected to a connecting shaft, and the connecting shaft is located inside the shaft transmission mechanism. Both ends of the connecting shaft are respectively connected to an alloy sleeve and a bearing for supporting the connecting shaft, and the end of the connecting shaft close to the alloy sleeve is connected to a rotating mechanism; the alloy sleeve and the rotating mechanism are abutted against each other for limiting position; an axial hole is provided at the end of the connecting shaft close to the output shaft, and a slot hole is provided on the inner wall of the axial hole, and a convex ridge matched with the slot hole is provided at the end of the output shaft close to the connecting shaft, and the output shaft is inserted into the axial hole of the connecting shaft, and the convex ridge abuts against the inside of the slot hole.

2. The force bearing structure of a pump transmission device according to claim 1, characterized in that: The shaft transmission mechanism includes a shell, and several layers of oil chambers, mechanical oil seals and skeleton oil seals are arranged inside the shell. The several layers of oil chambers and mechanical oil seals and skeleton oil seals are arranged alternately or in sequence. The connecting shaft is connected to the several layers of oil chambers, mechanical oil seals and skeleton oil seals respectively, and the alloy sleeve and bearing are both located inside the shell.

3. The force bearing structure of a pump transmission device according to claim 2, characterized in that: The mechanical oil seal, the skeleton oil seal and the plurality of layers of the oil chambers are arranged between the alloy sleeve and the bearing.

4. The force bearing structure of a pump transmission device according to claim 3, 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.

5. The force bearing structure of a pump transmission device according to claim 4, 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.

6. The force bearing structure of a pump transmission device according to claim 5, characterized in that: The force-bearing structure also includes a pump casing, the open end of the outer 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.

7. The force bearing structure of a pump transmission device according to claim 6, 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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