CN112228537A

CN112228537A - Gear box structure for horizontal centrifugal pump

Info

Publication number: CN112228537A
Application number: CN202011287114.0A
Authority: CN
Inventors: 陈永良; 陈小光; 吴万旺; 李林锋; 杨春野; 张祥; 杨国军; 曹军伟; 陈晓秦; 聂小林
Original assignee: Ebara Great Pumps Co Ltd
Current assignee: Ebara Great Pumps Co Ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-01-15

Abstract

The invention relates to the technical field of centrifugal pumps and discloses a gear box structure for a horizontal centrifugal pump, wherein a box body with an inner cavity, a driving assembly arranged in the inner cavity and a cooling structure for cooling the driving assembly in the inner cavity are arranged on a bottom plate, the bottom plate is used for supporting and mounting the gear box structure for the horizontal centrifugal pump, the cooling structure is used for cooling the driving assembly in the inner cavity so as to ensure the performance of a gear, an oil cavity for containing lubricating oil is arranged at the bottom of the inner cavity, an oil separation sleeve is arranged between the oil cavity and the low-speed shaft, an avoiding groove for avoiding the rotation of the large gear is arranged on the oil separation sleeve, scraps generated by the abrasion of the gear and the like can be deposited at the bottom of the oil cavity, through setting up the oil removal cover, can prevent that the slow-speed shaft from driving piece and the impurity of stirring oil pocket bottom when gear wheel rotates, and then guarantee the reliability of gear box system, reduce the frequency of the change of shutting down.

Description

Gear box structure for horizontal centrifugal pump

Technical Field

The invention relates to the technical field of centrifugal pumps, in particular to a gear box structure for a horizontal centrifugal pump.

Background

Centrifugal pumps operate by causing water to move centrifugally as a result of the rotation of an impeller. The centrifugal pump is generally driven by a gear box, a low-speed shaft in the gear box is connected with a driving source, the high-speed shaft is driven to operate by meshing transmission of a large gear and a small gear, lubricating oil needs to be arranged in the gear box for ensuring good transmission between the gears, and the lubricating oil and the gears in the prior art share an inner cavity space.

Disclosure of Invention

The invention aims to provide a gear box structure for a horizontal centrifugal pump, which aims to solve the problem that the reliability of a hydraulic system is influenced because the conventional gear of the gear box is easy to stir debris in lubricating oil to be attached to the gear or a shaft during operation.

In order to solve the problems, the invention provides a gear box structure for a horizontal centrifugal pump, which comprises a bottom plate, wherein a box body with an inner cavity, a driving assembly arranged in the inner cavity and a cooling structure for cooling the driving assembly in the inner cavity are arranged on the bottom plate;

the cooling structure includes gear pump, motor, cooler and filter, the motor with the gear pump is connected, the input of gear pump through return oil pipe with the oil pocket intercommunication, the output of gear pump through first oil pipe that send with the cooler intercommunication, the cooler with the filter intercommunication, the filter send oil pipe through the second with the box intercommunication.

Furthermore, the second oil delivery pipe comprises a first branch and a second branch, one end of the first branch is connected with the filter, the other end of the first branch is communicated with the inner cavity through the top of the box body, one end of the second branch is connected with the filter, and the other end of the second branch is communicated with the inner cavity through the side wall of the box body.

Furthermore, the box body comprises a body, and an end cover and a box cover which are arranged on two sides of the body, the end cover and the box cover enclose to form the inner cavity, the upper end of the body is provided with an oil inlet connected with the first branch, and the lower end of the body is provided with an oil outlet connected with the second branch.

Further, the cooling structure further comprises cooling fins arranged on the peripheral wall of the box body.

Further, still include the controller and with vibration sensor and alarm are connected to the controller electricity, the output of high-speed shaft pass through flange with the box is connected, vibration sensor locates on the flange.

Furthermore, the bottom of the box body is provided with a temperature sensor for detecting the temperature of the oil cavity, and the temperature sensor is electrically connected with the controller.

Further, the box body is also provided with an air relief plug communicated with the inner cavity.

The invention provides a gear box structure for a horizontal centrifugal pump, wherein a box body with an inner cavity, a driving assembly arranged in the inner cavity and a cooling structure for cooling the driving assembly in the inner cavity are arranged on a bottom plate, the bottom plate is used for supporting and installing the gear box structure for the horizontal centrifugal pump, the cooling structure is used for cooling the driving assembly in the inner cavity so as to ensure the performance of a gear, an oil cavity for containing lubricating oil is arranged at the bottom of the inner cavity, an oil separation sleeve is arranged between the oil cavity and a low-speed shaft, an avoiding groove for avoiding a large gear to rotate is arranged on the oil separation sleeve, and scraps generated by abrasion and the like of the gear can be deposited at the bottom of the oil cavity.

Drawings

Fig. 1 is a schematic structural view of a gear box structure for a horizontal centrifugal pump in an embodiment of the present invention.

Fig. 2 is a structural schematic diagram of another view of the structure of the gearbox for the horizontal centrifugal pump in the embodiment of the invention.

Fig. 3 is a schematic sectional view of a structure of a gear box for a horizontal centrifugal pump according to an embodiment of the present invention.

In the figure, 1, a bottom plate; 2. a box body; 3. a drive assembly; 4. a cooling structure; 5. a vibration sensor; 6. a temperature sensor; 21. a body; 22. an end cap; 23. a box cover; 201. an oil chamber; 202. an oil separating sleeve; 203. avoiding the groove; 204. an oil inlet; 205. an oil discharge port; 206. a connecting flange; 207. a gas release plug; 208. a seal ring; 209. a dust-proof sleeve; 210. a bearing; 31. a low speed shaft; 32. a high speed shaft; 33. a bull gear; 34. a pinion gear; 41. a gear pump; 42. a motor; 43. a cooler; 44. a filter; 45. an oil return pipe; 46. a first oil delivery pipe; 47. a second oil delivery pipe; 48. a heat sink; 471. a first branch; 472. a second branch.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Referring to fig. 1 to 3, schematically showing a horizontal centrifugal pump gearbox structure according to an embodiment of the present invention, including a bottom plate 1, a box 2 having an inner cavity, a driving assembly 3 disposed in the inner cavity, and a cooling structure 4 for cooling the driving assembly 3 in the inner cavity are disposed on the bottom plate 1, the driving assembly 3 includes a low-speed shaft 31, a high-speed shaft 32, a large gear 33 disposed on the low-speed shaft 31, and a small gear 34 disposed on the high-speed shaft 32 and engaged with the large gear 33, wherein the low-speed shaft 31 is connected to a power source, the low-speed shaft 31 is driven by the power source to rotate so as to achieve an accelerated output of the high-speed shaft 32 under the action of the gear, the high-speed shaft 32 and the low-speed shaft 31 are disposed in parallel from top to bottom to form the horizontal centrifugal pump gearbox structure, an oil cavity 201 for containing lubricating oil is disposed at the bottom of the inner cavity, an oil separation sleeve, the oil separation sleeve 202 is provided with an avoiding groove 203 for avoiding the rotation of the large gear 33.

Specifically, be equipped with the box 2 that has the inner chamber on bottom plate 1, locate drive assembly 3 in the inner chamber and be arranged in carrying out the cooling structure 4 of cooling treatment to drive assembly 3 in the inner chamber, bottom plate 1 is used for supporting and installing horizontal centrifugal pump gear box structure, cooling structure 4 is used for carrying out the cooling treatment in order to guarantee the performance of gear to drive assembly 3 in the inner chamber, the bottom in the inner chamber has an oil pocket 201 that holds lubricating oil, be equipped with oil separating sleeve 202 between oil pocket 201 and low-speed axle 31, be equipped with on the oil separating sleeve 202 and dodge gear wheel 33 pivoted and dodge recess 203, the piece that the gear produced because of wearing and tearing etc. can deposit in the bottom of oil pocket 201, can prevent to stir the piece and the impurity of oil pocket 201 bottom when low-speed axle 31 drives gear wheel 33 and rotates through setting up oil separating sleeve 202, and then guarantee hydraulic system's reliability, reduce the.

Further, the cooling structure 4 includes a gear pump 41, a motor 42, a cooler 43 and a filter 44, the motor 42 is connected to the gear pump 41, an input end of the gear pump 41 is communicated with the oil chamber 201 through an oil return pipe 45, an output end of the gear pump 41 is communicated with the cooler 43 through a first oil delivery pipe 46, the cooler 43 is communicated with the filter 44, the filter 44 is communicated with the box 2 through a second oil delivery pipe 47, that is, high-temperature lubricating oil in the oil chamber 201 enters the gear pump 41 through the oil return pipe 45 and then is cooled by the cooler 43, the filter 44 is filtered and then flows back to the box 2 again, the cooled lubricating oil can play a role in cooling the driving assembly 3 on one hand, on the other hand, the driving assembly 3 can be lubricated, and the performance of the driving assembly 3 is ensured. Preferably, the second oil feeding pipe 47 includes a first branch 471 and a second branch 472, one end of the first branch 471 is connected to the filter 44, the other end of the first branch 471 is communicated with the inner cavity through the top of the box 2, the cooling lubricant of the first branch 471 can flow in from the top of the box 2 and sequentially flows through the high-speed shaft 32, the small gear 34, the low-speed shaft 31 and the large gear 33, the cooling range is large, one end of the second branch 472 is connected to the filter 44, the other end of the second branch 472 is communicated with the inner cavity through the side wall of the box 2, the cooling lubricant of the second branch 472 flows through the low-speed shaft 31 and the large gear 33, and the cooling lubricant of the first branch 471 and the cooling lubricant realize cooling and lubricating effects.

In this embodiment, the box body 2 includes the body 21 and locates end cover 22 and case lid 23 of body 21 both sides, enclose between body 21, end cover 22 and the case lid 23 and close and form the inner chamber, generally, end cover 22 and case lid 23 pass through the bolt and are connected with body 21 fixedly, so that the installation is dismantled and is maintained, body 21 upper end is equipped with the oil inlet 204 of being connected with first branch circuit 471, body 21 lower extreme is equipped with the oil drain 205 of being connected with second branch circuit 472, the takeover intercommunication of cooling structure 4 is realized through oil inlet 204 and oil drain 205. In order to ensure the sealing performance between the end cap 22 and the body 21, a sealing ring 208 is provided at the joint of the end cap 22 and the body 21. The low-speed shaft 31 is installed between the end cover 22 and the body 21, the high-speed shaft 32 is installed between the box cover 23 and the body 21, a dustproof sleeve 209 is further arranged at the joint of the low-speed shaft 31 and the end cover 22, and bearings 210 are arranged between the low-speed shaft 31 and the end cover 22 and the body 21 and between the high-speed shaft 32 and the box cover 23 and the body 21 in order to ensure the rotation of the low-speed shaft 31 and the high-speed shaft 32.

In order to further enhance the cooling effect, the cooling structure 4 further includes a cooling fin 48 disposed on the outer peripheral wall of the case 2.

The gear box structure for the horizontal centrifugal pump in the embodiment further comprises a controller, and a vibration sensor 5 and an alarm are electrically connected with the controller, the output end of the high-speed shaft 32 is connected with the box body 2 through the connecting flange 206, the vibration sensor 5 is arranged on the connecting flange 206, the vibration condition on the high-speed shaft 32 is detected through the vibration sensor 5, when the vibration frequency on the high-speed shaft 32 exceeds a threshold value, the controller controls the alarm to alarm, and therefore the normal working performance of the gear box is guaranteed. Further, the bottom of the box body 2 is provided with a temperature sensor 6 for detecting the temperature of the oil cavity 201, the temperature sensor 6 is electrically connected with the controller, the temperature of the lubricating oil in the inner cavity of the box body 2 is detected through the temperature sensor 6, and when the oil temperature exceeds a threshold value, the controller controls the cooling structure 4 to be started so as to realize cooling and recycling of the lubricating oil.

In this embodiment, the box body 2 is further provided with a gas release plug 207 communicated with the inner cavity to ensure the pressure inside the inner cavity of the box body 2, so as to ensure the safety performance of the gear box.

It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A gear box structure for a horizontal centrifugal pump is characterized by comprising a bottom plate, wherein a box body with an inner cavity, a driving assembly arranged in the inner cavity and a cooling structure used for cooling the driving assembly in the inner cavity are arranged on the bottom plate, the driving assembly comprises a low-speed shaft, a high-speed shaft, a gear wheel arranged on the low-speed shaft and a pinion arranged on the high-speed shaft and in meshing transmission with the gear wheel, the high-speed shaft and the low-speed shaft are arranged in an up-and-down parallel mode, an oil cavity for containing lubricating oil is formed in the bottom of the inner cavity, an oil separation sleeve is arranged between the oil cavity and the low-speed shaft, and an avoiding groove for avoiding rotation of the gear wheel is formed in the oil separation sleeve;

the cooling structure comprises a gear pump, a motor, a cooler and a filter, wherein the motor is connected with the gear pump, the input end of the gear pump is communicated with the oil cavity through an oil return pipe, the output end of the gear pump is communicated with the cooler through a first oil delivery pipe, the cooler is communicated with the filter, and the filter is communicated with the box body through a second oil delivery pipe;

the vibration sensor is arranged on the connecting flange;

the bottom of the box body is provided with a temperature sensor for detecting the temperature of the oil cavity, and the temperature sensor is electrically connected with the controller.

2. The gear box structure for the horizontal centrifugal pump according to claim 1, wherein the second oil feed pipe comprises a first branch and a second branch, one end of the first branch is connected with the filter, the other end of the first branch is communicated with the inner cavity through the top of the box body, one end of the second branch is connected with the filter, and the other end of the second branch is communicated with the inner cavity through the side wall of the box body.

3. The gearbox structure for the horizontal centrifugal pump according to claim 2, wherein the box body comprises a body, and an end cover and a box cover which are arranged on two sides of the body, the end cover and the box cover enclose to form the inner cavity, the upper end of the body is provided with an oil inlet connected with the first branch, and the lower end of the body is provided with an oil outlet connected with the second branch.

4. The gear box structure for a horizontal centrifugal pump according to claim 3, wherein the cooling structure further comprises cooling fins provided on an outer peripheral wall of the case.

5. A gearbox structure for a horizontal centrifugal pump according to claim 4, wherein the casing is further provided with a gas release plug for communicating with the inner cavity.