Internal gear pump
By fixing the driven gear to the driven shaft and equipping it with lubricating components and a rolling support structure, the wear and noise problems of traditional internal gear pumps are solved, improving the durability and ease of maintenance of internal gear pumps.
Patent Information
- Application Number
- CN202423258809.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Traditional internal gear pumps are prone to wear, generate a lot of noise, and are difficult to maintain when conveying poorly lubricated materials.
It adopts a driven gear and a driven shaft fixedly connected, and is equipped with a first lubricating element and a first rolling support structure, including a first bearing and a bearing bracket, and is detachably connected to the end cover.
This prevents materials from seeping into the driven unit, reduces wear and noise, and improves operational stability and ease of maintenance.
Smart Images
Figure CN223648035U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of gear pump, more particularly to an internal gear pump. BACKGROUND
[0002] The internal meshing gear pump can be applied to conveying Newtonian liquid or non-Newtonian liquid in the industries of petroleum, chemical industry, paint, dye, food, oil and fat, medicine and the like, and the type of the conveyed liquid can be from light and volatile liquid to heavy and viscous liquid, and even semi-solid liquid. The conventional internal meshing gear pump drives the idler wheel to rotate through the driving gear, and the idler wheel gap is sleeved on the idler wheel pin. However, when conveying some poorly lubricated materials, it is impossible to avoid the material entering the gap between the idler wheel and the idler wheel pin, which will cause abnormal wear between the idler wheel and the idler wheel pin, resulting in problems such as short running cycle, loud noise and unstable operation of the equipment. In addition, the idler wheel pin of the conventional structure is installed by interference fit, and when maintenance or repair is required, the idler wheel pin needs to be damaged, making the installation and maintenance of the internal meshing gear pump more difficult and complex. SUMMARY
[0003] The utility model discloses a kind of internal gear pumps, which can reduce abnormal wear, improve running stability, and improve the convenience of installation and maintenance.
[0004] To solve the above technical problems, the utility model adopts the technical scheme of:
[0005] An internal gear pump is provided, comprising a driving unit, a driven unit, a pump housing, and an end cover. The end cover is arranged on the pump housing, and the driving unit is connected to the driven unit. The driving unit includes a driving shaft inserted into the pump housing and a driving internal gear arranged in the pump housing. The driving internal gear is connected to the driving shaft. The driven unit includes a driven shaft inserted into the end cover and a driven gear arranged in the pump housing. The driven gear is fixedly connected to the driven shaft, and the driven gear is engaged with the driving internal gear. A first lubricating member is arranged between the end cover and the driven shaft. The driven shaft is further connected to a first rolling support structure. The fixed end of the first rolling support structure is detachably connected to the end cover.
[0006] The utility model discloses an internal gear pump, the driven gear and driven shaft fixed connection's setting can avoid material infiltration driven unit, avoid the possibility of abnormal wear at driven unit place, and then can improve the durability of internal gear pump, the setting of first lubricating member can be used for the lubrication of internal gear pump, reduces the operating noise of internal gear pump, the setting of first rolling support structure can be used for supporting driven unit, improves the operating stability of internal gear pump, first rolling support structure and end cover detachable connection's setting can improve the convenience of internal gear pump installation and maintenance.
[0007] Preferably, the end cover is provided with a first insertion hole, the driven shaft passes through the first insertion hole, and the first lubricating member is located at the first insertion hole; the first insertion hole is filled with a lubricating medium, and the driven shaft is further connected with a first sealing member for sealing the first insertion hole.
[0008] Preferably, the first lubricating member comprises a first bearing bush sleeved on the driven shaft, the end cover is provided with a first flow channel in communication with the first insertion hole, and the first flow channel is in communication with the outside.
[0009] Preferably, one side of the first lubricating member in contact with the driven shaft is provided with a wear-resistant coating.
[0010] Preferably, the position of the driven shaft in contact with the first lubricating member is provided with a hardening coating.
[0011] Preferably, the first rolling support structure comprises a first bearing and a first bearing support connected with the first bearing, the first bearing is connected with the driven shaft, and the first bearing support is connected with the end cover through a connecting flange.
[0012] Preferably, the driven gear and the driven shaft are integrally formed.
[0013] Preferably, the driving unit further comprises a second rolling support structure connected with the driving shaft and a lubricating seat assembly, and the lubricating seat assembly is connected with the pump shell.
[0014] Preferably, the lubricating seat assembly comprises a lubricating seat sleeved with the driving shaft, a second bearing bush arranged between the lubricating seat and the driving shaft, one end of the lubricating seat is detachably connected with the pump shell, the other end is provided with a second sealing member, and the lubricating seat and the driving shaft are filled with a lubricating medium.
[0015] Preferably, the second rolling support structure comprises a second bearing connected with the driving shaft and a second bearing support connected with the second bearing, and the second bearing support is used for supporting the ground.
[0016] Compared with the prior art, the utility model has the advantages of
[0017] 1, the setting that from driving gear is fixedly connected with driven shaft, can avoid material seepage into driven unit, avoid the possibility that abnormal wear and tear is generated at driven unit, and then can improve the durability of internal gear pump, the setting of first lubricating part can be used for lubrication of internal gear pump, reduce the operating noise of internal gear pump, the setting of first rolling support structure can be used for supporting driven unit, improve the operating stability of internal gear pump, the setting that first rolling support structure is detachably connected with end cover, can improve the convenience of internal gear pump installation and maintenance,
[0018] 2, the setting of first bearing, first bearing support and connecting flange, can guarantee the support of driven shaft's axial thrust and radial force, improve the operating stability of internal gear pump,
[0019] 3, the setting of first bearing bush between driven shaft and end cover, and the setting that first insertion hole is filled with lubricating medium, can be used for lubrication and cooling of internal gear pump, reduce the operating noise of internal gear pump, can also improve the durability of internal gear pump. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is the structure schematic view of a kind of internal gear pump of the utility model;
[0021] Figure 2 It is the internal structure schematic view of a kind of internal gear pump of the utility model;
[0022] Figure 3 It is Figure 2 the enlarged schematic view of I part in it.
[0023] In the drawing: 100, drive unit;110, drive shaft;120, drive internal gear;130, lubricating seat;131, second flow channel;140, second bearing bush;150, second sealing member;160, second bearing;170, second bearing support;171, second bearing seat;172, support seat;200, driven unit;210, driven shaft;220, driven gear;300, pump shell;400, end cover;410, first insertion hole;420, first flow channel;500, first lubricating part;600, first rolling support structure;610, first bearing;620, first bearing support;621, first bearing seat;622, extension;630, connecting flange;700, first sealing member. DETAILED DESCRIPTION
[0024] The utility model makes further explanation in combination with specific implementation. Among them, the drawing is only for example explanation, and the representation is only a schematic diagram, and cannot be understood as the limitation of the patent; in order to better explain the embodiment of the utility model, some components of the drawing can be omitted, enlarged or reduced, and the size of actual product is not represented; for those skilled in the art, it is understandable that some well-known structures and their description in the drawing can be omitted.
[0025] The same or similar reference numerals in the drawings of the embodiments of the utility model correspond to the same or similar components; in the description of the utility model, it is understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawing, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0026] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.
[0027] In the utility model, unless otherwise specifically defined and limited, the terms "installation", "connection", "connection", "fixing" and the like should be understood broadly, for example, can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0028] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.
[0029] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.
[0030] Embodiment one
[0031] As Figures 1 to 3 The first embodiment of the internal gear pump of the present application is shown, which comprises a driving unit 100, a driven unit 200, a pump housing 300, an end cover 400, the end cover 400 is provided on the pump housing 300, and the driving unit 100 is connected with the driven unit 200; the driving unit 100 comprises a driving shaft 110 inserted with the pump housing 300, a driving internal gear 120 arranged in the pump housing 300, and the driving internal gear 120 is connected with the driving shaft 110; the driven unit 200 comprises a driven shaft 210 inserted with the end cover 400, a driven gear 220 arranged in the pump housing 300, and the driven gear 220 is fixedly connected with the driven shaft 210, and the driven gear 220 is engaged with the driving internal gear 120; a first lubricating member 500 is arranged between the end cover 400 and the driven shaft 210, and a first rolling support structure 600 is further connected on the driven shaft 210, and the fixed end of the first rolling support structure 600 is detachably connected with the end cover 400.
[0032] The fixed connection of the driven gear 220 and the driven shaft 210 can avoid the material from penetrating into the driven unit 200, avoid the possibility of abnormal wear at the driven unit 200, and further improve the durability of the internal gear pump; the first lubricating part 500 can be used for lubricating the internal gear pump and reducing the operation noise of the internal gear pump; the first rolling support structure 600 can be used for supporting the driven unit 200 and improving the operation stability of the internal gear pump; and the detachable connection of the first rolling support structure 600 and the end cover 400 can improve the convenience of the installation and maintenance of the internal gear pump. The internal gear pump can be used for conveying general fluid and conveying fluid with poor lubricity.
[0033] As shown in Figure 2 and Figure 3 , the end cover 400 is provided with a first insertion hole 410, the driven shaft 210 passes through the first insertion hole 410, and the first insertion hole 410 and the driven shaft 210 have a gap, and the gap constitutes a first lubricating cavity, and the first lubricating part 500 is located in the first lubricating cavity. The first lubricating cavity is also filled with lubricating medium, which can be used for lubricating the internal gear pump and reducing the operation noise of the internal gear pump. In order to avoid the outflow of the lubricating medium, the first sealing part 700 is further connected to the driven shaft 210, and the first sealing part 700 is in sealing connection with the end cover 400, which can be used for sealing the first lubricating cavity. In the embodiment, the first lubricating part 500 includes a first bearing bush sleeved on the driven shaft 210, the first sealing part 700 is a mechanical sealing part, and the lubricating medium can be a mixed solution of styrene and ethylbenzene. As shown in Figure 3 , the end cover 400 is further provided with a first flow channel 420, one end of the first flow channel 420 is in communication with the first lubricating cavity, and the other end of the first flow channel 420 is in communication with the outside. The setting of the first flow channel 420 can facilitate the delivery of the lubricating medium. After the delivery of the lubricating medium is completed, a plug can be arranged at the end of the first flow channel 420 in communication with the outside to block the end.
[0034] As shown in Figure 1 and Figure 2As shown, the first rolling support structure 600 is located outside the first seal 700, i.e. the first seal 700 is located between the end cover 400 and the first rolling support structure 600. In the embodiment, the first rolling support structure 600 comprises a first bearing 610, a first bearing bracket 620 connected to the first bearing 610, the first bearing 610 is connected to the driven shaft 210, and the first bearing bracket 620 is connected to the end cover 400 through a connecting flange 630. The first bearing 610, the first bearing bracket 620 and the connecting flange 630 can ensure the support of the axial thrust and radial force of the driven shaft 210, and improve the operation stability of the internal gear pump. Specifically, the first bearing bracket 620 comprises a first bearing seat 621 and an extension 622 connected to the outer wall of the first bearing seat 621, and the extension 622 is fixedly connected to the connecting flange 630; the extension 622 can provide installation space for the first seal 700. In the embodiment, the extension 622 can be a connecting plate, a connecting rod or other connecting structure that can achieve connection.
[0035] In the embodiment, the driven gear 220 is integrally formed with the driven shaft 210, and the integral formation can avoid material penetration into the driven unit 200 and abnormal wear between the driven gear 220 and the driven shaft 210, thereby improving the operation stability of the internal gear pump.
[0036] Embodiment Two
[0037] The embodiment is a second embodiment of an internal gear pump, which is similar to the first embodiment, except that in the embodiment, one side of the first lubricating member 500 in contact with the driven shaft 210 is provided with a wear-resistant coating. Figure 2 As shown, the first lubricating member 500 is a first bearing bush, and the inner side of the first bearing bush is provided with a wear-resistant coating, specifically, the wear-resistant coating can be a tungsten carbide coating. In the embodiment, the position of the driven shaft 210 in contact with the first bearing bush is provided with a hardening coating. The wear-resistant coating and the hardening coating can improve the durability of the internal gear pump.
[0038] Embodiment Three
[0039] The embodiment is a third embodiment of an internal gear pump, which is similar to the first embodiment or the second embodiment, except that as shown in Figure 1 and Figure 2 The driving unit 100 further comprises a second rolling support structure connected to the driving shaft 110 and a lubricating seat assembly, and the lubricating seat assembly is connected to the pump housing 300.
[0040] As shown in Figure 1 and Figure 2As shown, the lubricating seat assembly comprises a lubricating seat 130, the lubricating seat 130 is provided with a second insertion hole, the driving shaft 110 passes through the second insertion hole; the lubricating seat assembly further comprises a second bearing bush 140 arranged between the lubricating seat 130 and the driving shaft 110, one end of the lubricating seat 130 is detachably connected with the pump shell 300, and the other end is provided with a second sealing element 150; the lubricating seat 130 and the driving shaft 110 have a gap, the gap forms a second lubricating cavity, and the second lubricating cavity is also filled with lubricating medium. Specifically, the second bearing bush 140 is sleeved on the driving shaft 110, and the second bearing bush 140 is located at one end close to the driving inner gear 120, that is, the second bearing bush 140 is also located at the connection position of the lubricating seat 130 and the pump shell 300. In the embodiment, the lubricating seat 130 is provided with a second flow channel 131, one end of the second flow channel 131 is in communication with the second lubricating cavity, and the other end is in communication with the outside; the second flow channel 131 is arranged to facilitate the filling of the lubricating medium. The end of the second flow channel 131 in communication with the outside is also provided with a plug for plugging. In the embodiment, the second sealing element 150 is a mechanical sealing element.
[0041] As shown in Figure 1 and Figure 2 Figure 1 Figure 2 As shown, the second rolling support structure comprises a second bearing 160 connected with the driving shaft 110, and further comprises a second bearing bracket 170 connected with the second bearing 160, the second bearing bracket 170 is used for supporting the ground. In the embodiment, the second bearing bracket 170 comprises a second bearing seat 171 and a support seat 172 connected with the outer wall of the second bearing seat 171, the second bearing 160 is connected in the second bearing seat 171, and the support seat 172 is used for supporting the ground.
[0042] In the specific content of the above specific embodiments, any inconsistent combination of technical features can be combined, in order to make the description simple, not all possible combinations of the above technical features are described, however, as long as the combination of these technical features does not exist, it should be considered that it is within the scope of the present application.
[0043] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not a limitation on the embodiments of the present application. For ordinary skilled in the art, on the basis of the above description, other different forms of changes or variations can be made. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.
Claims
1. An internal gear pump, comprising a driving unit (100), a driven unit (200), a pump housing (300), an end cover (400) covering the pump housing (300), the driving unit (100) being connected with the driven unit (200); the driving unit (100) comprising a driving shaft (110) being inserted into the pump housing (300), a driving internal gear (120) being arranged in the pump housing (300), the driving internal gear (120) being connected with the driving shaft (110), characterized in that, The driven unit (200) comprises a driven shaft (210) inserted with the end cover (400), a driven gear (220) arranged in the pump shell (300), the driven gear (220) is fixedly connected with the driven shaft (210), and the driven gear (220) is engaged with the driving internal gear (120); a first lubricating part (500) is arranged between the end cover (400) and the driven shaft (210), and a first rolling support structure (600) is further connected to the driven shaft (210), and a fixed end of the first rolling support structure (600) is detachably connected with the end cover (400).
2. The internal gear pump of claim 1, wherein, The end cover (400) is provided with a first insertion hole (410), the driven shaft (210) passes through the first insertion hole (410), and the first lubricating part (500) is located at the first insertion hole (410); the first insertion hole (410) is filled with a lubricating medium, and a first sealing part (700) for sealing the first insertion hole (410) is further connected to the driven shaft (210).
3. The internal gear pump of claim 2, wherein, The first lubricating part (500) comprises a first bearing bush sleeved on the driven shaft (210), and the end cover (400) is provided with a first flow channel (420) in communication with the first insertion hole (410), and the first flow channel (420) is in communication with the outside.
4. The internal gear pump of claim 1, wherein, One side of the first lubricating part (500) in contact with the driven shaft (210) is provided with a wear-resistant coating.
5. The internal gear pump of claim 1, wherein, The position of the driven shaft (210) in contact with the first lubricating part (500) is provided with a hardening coating.
6. The internal gear pump of claim 1, wherein, The first rolling support structure (600) comprises a first bearing (610) and a first bearing support (620) connected with the first bearing (610), the first bearing (610) is connected with the driven shaft (210), and the first bearing support (620) is connected with the end cover (400) through a connecting flange (630).
7. The internal gear pump according to any one of claims 1 to 6, characterized in that The driven gear (220) is integrally formed with the driven shaft (210).
8. The internal gear pump according to any one of claims 1 to 6, characterized in that The driving unit (100) further comprises a second rolling support structure connected to the driving shaft (110) and a lubricating seat assembly connected with the pump shell (300).
9. The internal gear pump of claim 8, wherein, The lubricating seat assembly comprises a lubricating seat (130) sleeved with the driving shaft (110), and a second bearing bush (140) arranged between the lubricating seat (130) and the driving shaft (110), one end of the lubricating seat (130) is detachably connected with the pump shell (300), the other end is provided with a second sealing part (150), and the lubricating seat (130) and the driving shaft (110) are filled with a lubricating medium.
10. The internal gear pump of claim 8, wherein, The second rolling support structure comprises a second bearing (160) connected with the driving shaft (110), and a second bearing support (170) connected with the second bearing (160), and the second bearing support (170) is used for supporting the ground.