Grease lubrication bearing body structure with high inlet pressure

Abstract

The utility model relates to a grease lubricated bearing body structure with high inlet pressure. The grease lubricated bearing body structure comprises a shaft, a bearing body, a grease adding hole, a bearing temperature measuring element, a bearing body outer barrel, a bearing body vibration measuring element, a deflation valve, a rear dustproof disc, an angular contact ball bearing, a water drainage hole, a cylindrical roller bearing, a grease discharging hole, a cavity and the like, the angular contact ball bearing and the cylindrical roller bearing are both located between the bearing body and the shaft, and the angular contact ball bearing is located at the driving end. The cylindrical roller bearing is located at the non-driving end. A cavity is formed between the angular contact ball bearing and the cylindrical roller bearing, the ester adding hole, the bearing temperature measuring element, the bearing body vibration measuring element, the deflation valve, the rear bearing gland and the water discharging hole are all fixedly installed on the bearing body outer barrel, and the ester discharging hole is matched with the ester adding hole. Bearing temperature measurement and vibration measurement elements are added, and real-time temperature measurement and vibration measurement feedback is matched. The overall structure is compact and simple, the overall rigidity is good, and operation is more stable and reliable.

Description

Technical Field

[0001] The utility model relates to a grease lubricated bearing body structure, in particular to a grease lubricated bearing body structure with a high inlet pressure and a back-to-back angular contact bearing having an angular contact bearing connected in series, which has a simple and compact structure, stable performance, high reliability and a high-inlet pressure. Background Art

[0002] The emergency cooling system pump is mainly used to transport high-temperature condensate water for cooling other equipment in emergency situations. The conveying medium is condensate water, the medium temperature is 130°, the maximum inlet pressure of the pump is 9MPa, and grease lubrication is required.

[0003] Currently, there are single-stage, single-suction, horizontal cantilever centrifugal pumps with horizontal axial suction inlet and vertical center-upward discharge outlet. The pump body is volute-type, radially split, and horizontally supported. The impeller is integrally cast with a rear sealing ring and a balancing hole to balance the axial force of the pump. The residual axial force is borne by a pair of back-to-back angular contact ball bearings.

[0004] The inlet pressure of the existing product is less than 3.5MPa, and the ordinary back-to-back angular contact bearing with the impeller balance hole structure can balance the axial force. The inlet pressure of the existing product is small, which does not meet the requirement of inlet pressure of 9MPa; the air cooling of the bearing body structure of the existing product does not meet the requirements; the bearing body of the existing product lacks temperature and vibration measurement requirements; the existing product is an oil lubrication structure, which needs to be adjusted to ester lubrication, and the ester addition hole, ester discharge hole, and air release hole are designed. Utility Model Content

[0005] In view of the above problems, the main purpose of the utility model is to provide a grease-lubricated bearing body structure with high inlet pressure, which is simple and compact in structure, stable in performance, and highly reliable, and is connected in series with an angular contact bearing based on back-to-back angular contact bearings.

[0006] The utility model solves the above technical problems through the following technical scheme: a grease-lubricated bearing body structure with high inlet pressure, the grease-lubricated bearing body structure with high inlet pressure comprising: a shaft, a bearing body, a front bearing pressure cover, a grease adding hole, a bearing temperature measuring element, a bearing body outer cylinder, a bearing body vibration measuring element, an air release valve, a rear bearing pressure cover, a rear dustproof plate, a bracket, an angular contact ball bearing, a drain hole, a sealing cover, a cylindrical roller bearing, a front dustproof plate, a grease discharge hole, and a cavity.

[0007] The angular contact ball bearing and the cylindrical roller bearing are both located between the bearing body and the shaft, the angular contact ball bearing is located at the driving end; the cylindrical roller bearing is located at the non-driving end; there is a cavity between the angular contact ball bearing and the cylindrical roller bearing, and the driving end is fixed on the bracket.

[0008] The front bearing pressure cover and the rear bearing pressure cover respectively fix the cylindrical roller bearing and the angular contact ball bearing. A sealing cover is arranged between the cylindrical roller bearing and the cavity, and a sealing cover is arranged between the angular contact ball bearing and the cavity.

[0009] The grease adding hole, the bearing temperature measuring element, the bearing body vibration measuring element, the air release valve, the rear bearing gland and the water drain hole are all fixedly mounted on the outer cylinder of the bearing body, and the grease drain hole is a grease drain hole matched with the grease adding hole.

[0010] There are two grease adding holes, namely a first grease adding hole for adding grease to the cylindrical roller bearing at the non-driving end and a second grease adding hole for adding grease to the angular contact ball bearing at the driving end; there are two grease discharge holes, namely a first row of grease holes located below the cylindrical roller bearing at the non-driving end and cooperating with the first grease adding hole, and a second row of grease holes located below the angular contact ball bearing at the driving end and cooperating with the second grease adding hole.

[0011] The front bearing cover and the front dust plate are pressed together, and the rear bearing cover and the rear dust plate are pressed together. The front dust plate is located at the end of the cylindrical roller bearing away from the cavity, and the rear dust plate is located at the end of the angular contact ball bearing away from the cavity.

[0012] In a specific implementation example of the utility model, the outer cylinder of the bearing body is also provided with a cooling water inlet and a cooling water outlet.

[0013] In a specific implementation example of the present utility model, the high inlet pressure grease lubricated bearing body structure also includes an exhaust hole, which is an exhaust hole of the internal cavity, and the gas extends from the internal cavity to the rear bearing gland for discharge.

[0014] In a specific implementation example of the utility model, a groove is arranged on the front bearing cover, and a protrusion is arranged on the front dustproof plate, and the two are pressed together through the cooperation of the groove and the protrusion.

[0015] In a specific implementation example of the utility model, a groove is arranged on the rear bearing cover, and a protrusion is arranged on the rear dustproof plate, and the two are pressed together through the cooperation of the groove and the protrusion.

[0016] The positive progressive effect of the utility model is that the new through-flow pump structure provided by the utility model has the following advantages: compared with the oil lubrication structure of the existing products, the utility model is a grease lubrication structure, and is equipped with grease adding holes, grease draining holes, and air release holes.

[0017] The utility model adds bearing temperature and vibration measuring elements, and provides matching real-time temperature and vibration measurement feedback.

[0018] The utility model has a compact and simple overall structure, good overall rigidity, and more stable and reliable operation.

[0019] The bearing body component of the utility model has a simple and compact structure, stable performance, high reliability and low failure risk.

[0020] The utility model considers that the temperature of the conveying medium is high, and the bearing body is added with a water cooling structure according to the design requirements, and is designed with a water cooling cavity, two cooling water inlets and outlets, a water cooling cavity exhaust hole, and a water cooling cavity drain hole.

[0021] The utility model connects an angular contact bearing in series on the basis of the back-to-back angular contact bearings, thereby meeting the bearing life requirement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0023] Figure 2 It is a three-dimensional diagram of the product after molding of the utility model.

[0024] The following are the names corresponding to the label numbers in this utility model:

[0025] Shaft 1, bearing body 2, front bearing pressure cover 3, ester addition hole 4, bearing temperature measuring element 5, bearing body outer cylinder 6, bearing body vibration measuring element 7, bleed valve 8, rear bearing pressure cover 9, rear dustproof plate 10, bracket 11, angular contact ball bearing 12, drain hole 13, sealing cover 14, cylindrical roller bearing 15, front dustproof plate 16, ester discharge hole 17, cavity 18, cooling water inlet 19, cooling water outlet 20, exhaust hole 21. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to illustrate the technical solution of the present invention in detail.

[0027] Figure 1 It is a schematic diagram of the overall structure of the utility model. Figure 2 It is a three-dimensional diagram of the product after molding of the utility model, such as Figure 1-2 As shown: the utility model provides a high inlet pressure grease lubricated bearing body structure, including: shaft 1, bearing body 2, front bearing gland 3, grease adding hole 4, bearing temperature measuring element 5, bearing body outer cylinder 6, bearing body vibration measuring element 7, air release valve 8, rear bearing gland 9, rear dust plate 10, bracket 11, angular contact ball bearing 12, drain hole 13, sealing cover 14, cylindrical roller bearing 15, front dust plate 16, grease discharge hole 17, cavity 18; angular contact ball bearing 12 and cylindrical roller bearing 15 They are all located between the bearing body 2 and the shaft 1, the angular contact ball bearing 12 is located at the driving end; the cylindrical roller bearing 15 is located at the non-driving end; there is a cavity 18 between the angular contact ball bearing 12 and the cylindrical roller bearing 15, the driving end is fixed on the bracket 11, the front bearing pressure cover 3 and the rear bearing pressure cover 9 fix the cylindrical roller bearing 15 and the angular contact ball bearing 12 respectively, a sealing cover 14 is provided between the cylindrical roller bearing 15 and the cavity 18, and a sealing cover 14 is provided between the angular contact ball bearing 12 and the cavity 18.

[0028] The ester adding hole 4, the bearing temperature measuring element 5, the bearing body vibration measuring element 7, the air release valve 8, the rear bearing gland 9, and the water drain hole 13 are all fixedly mounted on the bearing body outer cylinder 6, and the ester discharge hole 17 is an ester discharge hole that cooperates with the ester adding hole 4.

[0029] The grease adding holes 4 include two, namely, a first grease adding hole for grease adding to the cylindrical roller bearing at the non-driving end and a second grease adding hole for grease adding to the angular contact ball bearing at the driving end; the grease discharge holes 17 include two, namely, a first row of grease holes cooperating with the first grease adding holes and located below the cylindrical roller bearing at the non-driving end, and a second row of grease holes cooperating with the second grease adding holes and located below the angular contact ball bearing at the driving end.

[0030] The front bearing cover 3 and the front dust plate 16 are pressed together, and the rear bearing cover 9 and the rear dust plate 10 are pressed together. The front dust plate 16 is located at the end of the cylindrical roller bearing 15 away from the cavity 18, and the rear dust plate 10 is located at the end of the angular contact ball bearing 12 away from the cavity 18.

[0031] The outer cylinder 6 of the bearing body of the present invention is also provided with a cooling water inlet 19 and a cooling water outlet 20 .

[0032] The high inlet pressure grease lubricated bearing body structure proposed in the utility model further comprises an exhaust hole 21 , which is an exhaust hole of the internal cavity, and the gas extends from the internal cavity to the rear bearing gland 9 for discharge.

[0033] The front bearing cover 3 of the utility model is provided with a groove, and the front dust plate 16 is provided with a protrusion, and the two are pressed together by the cooperation of the groove and the protrusion. The rear bearing cover 9 is provided with a groove, and the rear dust plate 10 is provided with a protrusion, and the two are pressed together by the cooperation of the groove and the protrusion.

[0034] The ester lubricated bearing body structure proposed in the utility model lubricates cylindrical roller bearings and angular contact ball bearings, and is equipped with two ester adding holes 4, two ester draining holes 17, and an exhaust hole 21 of a cavity 18, so as to ensure the reliable operation and maintenance of the bearings and the addition of lubricating grease.

[0035] In order to solve the axial force when the inlet pressure is 9MPa, the ordinary back-to-back angular contact bearings with the impeller balancing hole structure can no longer meet the requirement of balancing the axial force, and the shaft head force increases exponentially. The utility model needs to cancel the impeller balancing hole structure and connect an angular contact bearing in series on the basis of the back-to-back angular contact bearings to meet the bearing life requirements.

[0036] The bearing body 2 and the outer cylinder 6 of the bearing body in the utility model provide a water cooling chamber for two groups of bearings, and are equipped with a cooling water inlet and a cooling water outlet to cool the bearings. In addition, the water cooling chamber is equipped with an air release valve 8 and a water drain hole 13 to ensure the normal operation of the cooling water and convenient maintenance.

[0037] The utility model provides three bearing temperature measuring elements 5 for cylindrical roller bearings and angular contact ball bearings, so as to detect and feed back the operating temperature information of the bearings in real time.

[0038] The bearing body 2 and the outer cylinder 6 of the bearing body are equipped with a bearing body vibration measuring element 7 in both horizontal and vertical directions of the outer cylinder of the bearing body to detect and feedback the vibration information of the bearing body in real time.

[0039] Compared with the oil lubrication structure of the existing products, the utility model has a grease lubrication structure and is equipped with grease adding holes, grease draining holes and air releasing holes.

[0040] The utility model adds bearing temperature and vibration measuring elements, and provides matching real-time temperature and vibration measurement feedback.

[0041] The utility model has a compact and simple overall structure, good overall rigidity, and more stable and reliable operation.

[0042] The bearing body component of the utility model has a simple and compact structure, stable performance, high reliability and low failure risk.

[0043] The utility model considers that the temperature of the conveying medium is high, and the bearing body is added with a water cooling structure according to the design requirements, and is designed with a water cooling cavity, two cooling water inlets and outlets, a water cooling cavity exhaust hole, and a water cooling cavity drain hole.

[0044] The utility model connects an angular contact bearing in series on the basis of the back-to-back angular contact bearings, thereby meeting the bearing life requirement.

[0045] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A grease-lubricated bearing body structure with high inlet pressure, the grease-lubricated bearing body structure with high inlet pressure comprising: Shaft, bearing body, front bearing gland, grease adding hole, bearing temperature measuring element, bearing body outer cylinder, bearing body vibration measuring element, air release valve, rear bearing gland, rear dust plate, bracket, angular contact ball bearing, drain hole, sealing cover, cylindrical roller bearing, front dust plate, grease drain hole, cavity; Both the angular contact ball bearing and the cylindrical roller bearing are located between the bearing body and the shaft. The angular contact ball bearing is located at the drive end; the cylindrical roller bearing is located at the non-drive end. There is a cavity between the angular contact ball bearing and the cylindrical roller bearing, and the drive end is fixed on the bracket. The front bearing gland and the rear bearing gland fix the cylindrical roller bearing and the angular contact ball bearing respectively. A sealing cover is provided between the cylindrical roller bearing and the cavity, and a sealing cover is provided between the angular contact ball bearing and the cavity. The grease adding hole, bearing temperature measuring element, bearing body vibration measuring element, air release valve, rear bearing gland, and water drain hole are all fixedly installed on the outer cylinder of the bearing body. The grease drain hole is a grease drain hole that cooperates with the grease adding hole. The grease adding holes include two, namely, a first grease adding hole for adding grease to the cylindrical roller bearing at the non-driving end and a second grease adding hole for adding grease to the angular contact ball bearing at the driving end; the grease discharging holes include two, namely, a first row of grease holes located below the cylindrical roller bearing at the non-driving end and cooperating with the first grease adding hole, and a second row of grease holes located below the angular contact ball bearing at the driving end and cooperating with the second grease adding hole; The front bearing cover and the front dust plate are pressed together, and the rear bearing cover and the rear dust plate are pressed together. The front dust plate is located at the end of the cylindrical roller bearing away from the cavity, and the rear dust plate is located at the end of the angular contact ball bearing away from the cavity.

2. The high inlet pressure grease lubricated bearing body structure according to claim 1 is characterized in that: The outer cylinder of the bearing body is also provided with a cooling water inlet and a cooling water outlet.

3. The high inlet pressure grease lubricated bearing body structure according to claim 1, characterized in that: The grease lubricated bearing body structure with high inlet pressure also includes an exhaust hole, which is an exhaust hole of the internal cavity, and the gas extends from the internal cavity to the rear bearing gland for discharge.

4. The high inlet pressure grease lubricated bearing body structure according to claim 1, characterized in that: A groove is arranged on the front bearing pressure cover, and a protrusion is arranged on the front dustproof plate, and the two are pressed together through the cooperation of the groove and the protrusion.

5. The high inlet pressure grease lubricated bearing body structure according to claim 1, characterized in that: A groove is arranged on the rear bearing pressure cover, and a protrusion is arranged on the rear dustproof plate, and the two are pressed together through the cooperation of the groove and the protrusion.

Images