Chemical internal gear pump adopting external rolling bearing as idle wheel bearing
By using external rolling bearings and adding seals in chemical internal gear pumps, the problems of easy corrosion and rapid wear of idler gear bearings are solved, the service life of chemical internal gear pumps is extended and the solidification or carbonization of the medium is prevented.
Patent Information
- Application Number
- CN202422582851.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-10-25
AI Technical Summary
The idler bearings in chemical internal gear pumps are prone to corrosion, difficult to lubricate, wear quickly, have a short life, and are damaged by solidification or carbonization of high-temperature media.
External rolling bearings are used to replace traditional built-in sliding bearings. The rolling bearings outside the medium are lubricated by grease or lubricating oil, and a seal is set between the idler shaft and the front cover to prevent the medium from entering.
Effectively prevent medium corrosion, reduce friction and heat generation, extend bearing life, avoid medium solidification or carbonization, and increase pump service life.
Smart Images
Figure CN223359398U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of chemical internal gear pumps, in particular to a chemical internal gear pump with an idler bearing adopting an external rolling bearing. Background Art
[0002] The internal gear pump has the advantages of small size, light weight, simple structure, easy manufacturing, low price, reliable operation, good self-priming performance, insensitive to oil contamination, and easy maintenance.
[0003] For chemical media applications, idler bearings usually use built-in sliding bearings that do not react with the media, such as copper, alloy steel, graphite, ceramic, silicon carbide, and tungsten carbide. However, for high-viscosity and temperature-sensitive applications, the idler bearing's surface friction surface carries a large load and produces high friction. In addition, the media has high viscosity, poor lubricity, and is difficult to enter the bearing for lubrication and to remove the heat generated by friction. This can lead to wear and damage to the idler pin and the paired sliding bearing, shortening their service life. In severe cases, the high temperature generated by friction can cause the high-viscosity media to solidify or carbonize, damaging the idler bearing. Utility Model Content
[0004] In response to the problems in the related art, the present application discloses a chemical internal gear pump with an idler bearing using an external rolling bearing, which solves the problems in the related art that the idler bearing is easy to corrode, difficult to lubricate, wears out quickly, has a short life, and the high-temperature medium solidifies or carbonizes and damages the idler bearing.
[0005] To achieve the above objectives, this application provides the following technical solutions:
[0006] A chemical internal gear pump with an idler gear bearing using an external rolling bearing includes a pump body, a main shaft is provided in the pump body, the main shaft is dynamically connected to a driving gear, the inner side of the driving gear is meshedly connected to the outer side of the idler gear, a front cover is fixedly provided on one side of the pump body, an idler gear shaft is fixedly connected to the center of the idler gear, the idler gear shaft passes through the front cover, the outer end of the idler gear shaft is connected to the front cover via a rolling bearing, and the idler gear and the idler gear shaft are integrally connected to the front cover via the rolling bearing and are rotatable.
[0007] As a further solution of the present application: a mounting groove is provided on the outer side of the front cover, and the rolling bearing is fully positioned in the mounting groove.
[0008] As a further solution of the present application: a locking nut is fixedly provided at the outer end of the idler shaft, and the locking nut fixes the inner ring of the rolling bearing and the idler shaft as a whole.
[0009] As a further solution of the present application: a bearing pressure cover is fixed on the outer side of the front cover by screws, and the bearing pressure cover presses and fixes the outer ring of the rolling bearing, and the outer ring of the rolling bearing and the front cover are positioned as a whole through the bearing pressure cover.
[0010] As a further solution of the present application: a seal is provided on the front cover and the inner contact end of the rolling bearing.
[0011] In summary, the beneficial effects of this application are:
[0012] The idler bearing of the chemical internal gear pump adopts an external rolling bearing. For chemical media, the built-in sliding idler bearing that is lubricated by the medium is replaced with an external rolling bearing arranged outside the medium. The idler shaft and the idler rotate together, and the idler shaft and the front cover are sealed to prevent the medium in the pump from entering the external rolling bearing, avoiding corrosion of the medium and preventing the medium from entering the rolling bearing and raising the temperature. At the same time, grease or oil is used to lubricate the rolling bearing, reducing the friction of the idler bearing and the heat generated by friction, solving the problem of easy solidification or carbonization of the medium in the idler bearing of traditional chemical internal gear pumps.
[0013] It avoids the corrosion of the medium on the bearing, greatly reduces the wear of the bearing and reduces the heat generated by friction, thereby extending the life of the pump and preventing the medium in the pump from solidifying and carbonizing. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The accompanying drawings are used to provide further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application.
[0015] In the attached figure:
[0016] Figure 1 This is a schematic diagram of the structure of a traditional chemical internal gear pump.
[0017] Figure 2 This is a schematic diagram of the internal structure of the internal gear pump with an external idler rolling bearing of the present invention.
[0018] Notes on reference numerals:
[0019] 1. Front cover; 2. Idle pulley; 3. Pump body; 4. Sliding bearing; 5. Idle pulley pin; 6. Idle pulley shaft; 7. Rolling bearing; 8. Bearing gland; 9. Lock nut; 10. Seal; 11. Screws; 12. Mounting slot; DETAILED DESCRIPTION
[0020] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatuses and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
[0021] It should be noted that all directional indications in the embodiments (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0022] In addition, the descriptions of "first" and "second" in the embodiments are only for descriptive purposes and do not specifically refer to the order or ranking, nor are they used to limit the present application. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0023] In order to further understand the content, features and effects of the present application, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:
[0024] like Figure 1 The following is a schematic diagram of the structure of a traditional chemical internal gear pump:
[0025] The sliding bearing 4 is shrink-fitted into the idler 2 and into the pump body 3; the idler pin 5 is shrink-fitted into the front cover 1. The idler 2 and the sliding bearing 4 rotate together on the fixed idler pin 5. Their rotation mainly adopts the sliding friction pair composed of the inner ring of the sliding bearing 4 and the outer ring of the idler pin 5. Their lubrication mainly relies on the medium lubrication in the pump body 3.
[0026] like Figure 2 The figure shows the internal structure of the internal gear pump with the idler rolling bearing externally mounted in this application:
[0027] The idler gear bearing adopts an external rolling bearing for the chemical internal gear pump, which includes a pump body 3. A main shaft is provided inside the pump body 3, which is dynamically connected to the driving gear. The inner side of the driving gear is meshed with the outer side of the idler gear 2. A front cover 1 is fixedly provided on one side of the pump body 3. An idler shaft 6 is fixedly connected to the center of the idler gear 2. The idler shaft 6 passes through the front cover 1. A mounting groove 12 is provided on the outer side of the front cover 1. A rolling bearing 7 is fully positioned in the mounting groove 12. The outer end of the idler shaft 6 is connected to the front cover 1 through the rolling bearing 7. The idler gear 2 and the idler shaft 6 are integrally connected to the front cover 1 through the rolling bearing 7 and are rotatable.
[0028] A locking nut 9 is fixedly provided on the outer end of the idler shaft 6 , and the locking nut 9 fixes the inner ring of the rolling bearing 7 and the idler shaft 6 as a whole.
[0029] A bearing cover 8 is fixed to the outside of the front cover 1 by screws 11 . The bearing cover 8 compresses and fixes the outer ring of the rolling bearing 7 . The outer ring of the rolling bearing 7 and the front cover 1 are positioned as a whole through the bearing cover 8 .
[0030] A seal 10 is provided at the contact end between the front cover 1 and the inner side of the rolling bearing 7 .
[0031] In practical applications:
[0032] Idler 2, inside pump body 3, is fixed to idler shaft 6. Locknut 9 positions the inner ring of rolling bearing 7 on idler shaft 6. The outer ring of rolling bearing 7 is mounted on the outer inner ring of front cover 1. Screws 11 are used to press bearing cover 8 against the outer ring of rolling bearing 7, fully positioning the outer ring of rolling bearing 7 against the outer inner ring of front cover 1. When idler 2 rotates, it drives idler shaft 6, the inner ring of rolling bearing 7, and locknut 9 to rotate together. Thus, the bearing of idler 2 becomes rolling bearing 7.
[0033] In order to prevent the medium in the pump body 3 from entering the rolling bearing 7 along the gap between the idler shaft 6 and the front cover 1 and corroding the bearing, a seal 10 is installed in the front cover 1 on the rear side of the rolling bearing 7 to seal the gap between the idler shaft 6 and the front cover 1.
[0034] The conventional built-in sliding bearing is changed to an external rolling bearing. In order to better lubricate the rolling bearing 7 , grease can be added to the rolling bearing 7 or lubricating oil can be added to the pressure cover 8 .
[0035] In this way, the traditional built-in sliding idler bearing lubricated by the medium is replaced by an external rolling bearing arranged outside the medium and lubricated by oil or grease, thereby solving the problems of idler bearings being easy to corrode, difficult to lubricate, fast bearing wear, short life, and damage to the idler bearings caused by solidification of high-temperature media.
[0036] It avoids the corrosion of the medium on the bearing, greatly reduces the wear of the bearing and reduces the heat generated by friction, thereby extending the life of the pump and preventing the medium in the pump from solidifying and carbonizing.
[0037] Finally, it should be noted that the above disclosure is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application. The scope of the present application is limited only by the appended claims.
Claims
1. A chemical internal gear pump with an idler bearing using an external rolling bearing, comprising a pump body (3), wherein a main shaft is provided in the pump body (3), the main shaft is dynamically connected to a driving gear, the inner side of the driving gear is meshedly connected to the outer side of the idler (2), and a front cover (1) is fixedly provided on one side of the pump body (3), characterized in that: The center of the idler wheel (2) is fixedly connected to an idler wheel shaft (6), the idler wheel shaft (6) passes through the front cover (1), the outer end of the idler wheel shaft (6) is connected to the front cover (1) via a rolling bearing (7), and the idler wheel (2) and the idler wheel shaft (6) are integrally connected to the front cover (1) via the rolling bearing (7) and are rotatable.
2. A chemical internal gear pump with an idler bearing using an external rolling bearing according to claim 1, characterized in that: The outer side of the front cover (1) is provided with a mounting groove (12), and the rolling bearing (7) is fully positioned in the mounting groove (12).
3. The chemical internal gear pump with an idler bearing using an external rolling bearing according to claim 1, characterized in that: A locking nut (9) is fixedly provided on the outer end of the idler shaft (6), and the locking nut (9) fixes the inner ring of the rolling bearing (7) and the idler shaft (6) as a whole.
4. The chemical internal gear pump with an idler bearing using an external rolling bearing according to claim 1, characterized in that: A bearing pressure cover (8) is fixed to the outside of the front cover (1) by screws (11), and the bearing pressure cover (8) compresses and fixes the outer ring of the rolling bearing (7). The outer ring of the rolling bearing (7) and the front cover (1) are positioned as a whole through the bearing pressure cover (8).
5. The chemical internal gear pump with an idler bearing using an external rolling bearing according to claim 1, characterized in that: A seal (10) is provided at the contact end between the front cover (1) and the inner side of the rolling bearing (7).